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CN111918817A - Gas treatment system and ship comprising same - Google Patents

Gas treatment system and ship comprising same Download PDF

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Publication number
CN111918817A
CN111918817A CN201980022626.3A CN201980022626A CN111918817A CN 111918817 A CN111918817 A CN 111918817A CN 201980022626 A CN201980022626 A CN 201980022626A CN 111918817 A CN111918817 A CN 111918817A
Authority
CN
China
Prior art keywords
gas
boil
filling
storage tank
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201980022626.3A
Other languages
Chinese (zh)
Inventor
俞炳瑢
朴宰薰
李勳熙
朴锡俊
李申求
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HD Korea Shipbuilding and Offshore Engineering Co Ltd
HD Hyundai Heavy Industries Co Ltd
Original Assignee
Hyundai Heavy Industries Co Ltd
Korea Shipbuilding and Offshore Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hyundai Heavy Industries Co Ltd, Korea Shipbuilding and Offshore Engineering Co Ltd filed Critical Hyundai Heavy Industries Co Ltd
Publication of CN111918817A publication Critical patent/CN111918817A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F17C9/04—Recovery of thermal energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F25J1/0025—Boil-off gases "BOG" from storages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0045—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by vaporising a liquid return stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/007—Primary atmospheric gases, mixtures thereof
    • F25J1/0072—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
    • F25J1/0202—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal refrigeration loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0204—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0229—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock
    • F25J1/023—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock for the combustion as fuels, i.e. integration with the fuel gas system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0262—Details of the cold heat exchange system
    • F25J1/0264—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0262—Details of the cold heat exchange system
    • F25J1/0264—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
    • F25J1/0265—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams comprising cores associated exclusively with the cooling of a refrigerant stream, e.g. for auto-refrigeration or economizer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • F17C2205/0367—Arrangements in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/043—Localisation of the removal point in the gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F17C2223/047—Localisation of the removal point in the liquid with a dip tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/035—High pressure, i.e. between 10 and 80 bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/036—Very high pressure, i.e. above 80 bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
    • F17C2225/042—Localisation of the filling point
    • F17C2225/043—Localisation of the filling point in the gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0323—Heat exchange with the fluid by heating using another fluid in a closed loop
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0327—Heat exchange with the fluid by heating with recovery of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0339—Heat exchange with the fluid by cooling using the same fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • F17C2227/0355—Heat exchange with the fluid by cooling using another fluid in a closed loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0365—Heat exchange with the fluid by cooling with recovery of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/046—Enhancing energy recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/031—Treating the boil-off by discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2265/00—Effects achieved by gas storage or gas handling
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    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/037—Treating the boil-off by recovery with pressurising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/065—Fluid distribution for refuelling vehicle fuel tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/34—Details about subcooling of liquids

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

According to the present invention, a gas treatment system for delivering liquefied gas from a storage tank of a filling vessel to a C-type fuel tank provided in a gas-propelled vessel, and a vessel including the gas treatment system, includes: a filling line for supplying the liquefied gas in the storage tank to the fuel tank; a charge management unit that adjusts the internal pressure of the storage tank by liquefying the boil-off gas in the storage tank with a refrigerant and then refluxing the liquefied boil-off gas; and an evaporation gas return line that delivers evaporation gas generated in the fuel tank when filling is performed through the filling line to the filling vessel, the filling management portion reducing an internal pressure of the storage tank to a preset pressure or less before filling, maintaining the internal pressure of the storage tank to be less than an internal pressure of the fuel tank during filling, thereby eliminating the need for an additional compressor to compress the evaporation gas when delivered through the evaporation gas return line.

Description

气体处理系统及包括该气体处理系统的船舶Gas handling system and ship including the same

技术领域technical field

本发明涉及一种气体处理系统及包括该气体处理系统的船舶。The present invention relates to a gas processing system and a ship including the gas processing system.

背景技术Background technique

船舶是装载大量的矿物、原油、天然气体或者几千个以上的集装箱等在海洋上航行的运输手段，它由钢制成，在借助浮力漂浮于水面上的状态下，利用螺旋桨旋转所产生的推力进行移动。A ship is a means of transportation that carries a large amount of minerals, crude oil, natural gas or thousands of containers on the ocean. It is made of steel and floats on the water with the help of buoyancy. thrust to move.

这种船舶通过驱动诸如引擎或燃气轮机等来产生推力，此时引擎使用诸如汽油或柴油等燃料来移动活塞，使得曲轴通过活塞的往复运动而旋转，使连接于曲轴的轴旋转，从而螺旋桨被驱动，而燃气轮机使用的方式是，与压缩空气一同燃烧燃料，通过燃烧空气的温度/压力来旋转涡轮叶片，从而发电并将动力传递给螺旋桨。This type of ship generates thrust by driving an engine such as an engine or a gas turbine, where the engine uses fuel such as gasoline or diesel to move the pistons, causing the crankshaft to rotate through the reciprocating motion of the pistons, causing the shaft connected to the crankshaft to rotate, and the propeller to be driven , while gas turbines use the way that they combust fuel with compressed air, and the temperature/pressure of the combustion air rotates the turbine blades, which generate electricity and transmit power to the propeller.

然而，最近，在运输作为一种液化气体的液化天然气(Liquefied Natural Gas)的LNG运输船上，采用了通过将LNG作为燃料来驱动引擎或涡轮等的需求端的LNG燃料供应方式，并且由于LNG是洁净燃料且储存量也比石油丰富，因此使用LNG作为需求端的燃料的方式也适用于除了LNG运输船之外的其他船舶上。However, recently, on an LNG carrier that transports liquefied natural gas (Liquefied Natural Gas), which is a liquefied gas, a demand-side LNG fuel supply method is adopted by using LNG as a fuel to drive an engine, a turbine, etc., and since LNG is clean Fuel and storage are also more abundant than oil, so the way of using LNG as the fuel on the demand side is also applicable to other ships except LNG carriers.

但是，与柴油不同，LNG具有必须将其保持在超低温状态以在装载/卸载期间保持液相的特性。因此，有必要研究和开发一种将LNG稳定地加注到除应用LNG推进方法的LNG运输船以外的船舶的技术。However, unlike diesel, LNG has the property that it must be kept at an ultra-low temperature to maintain the liquid phase during loading/unloading. Therefore, it is necessary to research and develop a technique for stably bunkering LNG to ships other than the LNG carrier to which the LNG propulsion method is applied.

发明内容SUMMARY OF THE INVENTION

发明要解决的问题Invention to solve problem

本发明是为了解决如上所述的问题而提出，本发明的目的在于，在将液化气体加注到燃气推进船舶的过程中实现稳定和快速的液化气体的输送，从而能够提高加注效率。The present invention is made to solve the above-mentioned problems, and an object of the present invention is to realize stable and fast delivery of liquefied gas in the process of bunkering liquefied gas into a gas-propelled ship, thereby improving bunkering efficiency.

用于解决问题的手段means to solve the problem

根据本发明一方面的气体处理系统，作为从加注船舶的储存罐向设置在燃气推进船舶的C型燃料罐输送液化气体的气体处理系统，其特征在于，包括：加注线，将所述储存罐的液化气体供给到所述燃料罐；加注管理部，利用制冷剂使所述储存罐的蒸发气体液化后回流，从而调节所述储存罐的内压；以及蒸发气体回流线，将通过所述加注线进行加注时在所述燃料罐中产生的蒸发气体输送到所述加注船舶，所述加注管理部在加注之前将所述储存罐的内压降低到预设压力以下，在加注期间将所述储存罐的内压保持在小于所述燃料罐的内压，从而使蒸发气体在通过所述蒸发气体回流线进行输送时不需要由额外的压缩机压缩。A gas processing system according to an aspect of the present invention, as a gas processing system for transporting liquefied gas from a storage tank of a refueling ship to a C-type fuel tank installed in a gas-propelled ship, is characterized by comprising: a refilling line for adding the The liquefied gas in the storage tank is supplied to the fuel tank; the filling management part uses the refrigerant to liquefy the boil-off gas in the storage tank and returns it, so as to adjust the internal pressure of the storage tank; and the boil-off gas return line The boil-off gas generated in the fuel tank when refueling through the refueling line is delivered to the refueling ship, and the refueling management section reduces the internal pressure of the storage tank to a preset value before refueling below pressure, the internal pressure of the storage tank is kept less than the internal pressure of the fuel tank during refill, so that boil-off gas does not need to be compressed by an additional compressor as it is delivered through the boil-off gas return line .

具体而言，所述储存罐可以是隔膜型或C型的罐，所述预设压力可以为0.04barG或0.2barG。Specifically, the storage tank may be a diaphragm-type or C-type tank, and the preset pressure may be 0.04 barG or 0.2 barG.

具体而言，所述加注管理部可以包括使蒸发气体液化的再液化装置，所述蒸发气体回流线可以将蒸发气体输送到所述再液化装置。Specifically, the filling management section may include a reliquefaction device that liquefies the boil-off gas, and the boil-off gas return line may deliver the boil-off gas to the reliquefaction device.

具体而言，所述加注管理部可以在加注期间使通过所述蒸发气体回流线输送的蒸发气体再液化后返回到所述储存罐，以将所述储存罐的内压保持在小于所述燃料罐的内压。Specifically, the filling management part may reliquefy boil-off gas sent through the boil-off gas return line and return it to the storage tank during filling, so as to maintain the internal pressure of the storage tank at less than The internal pressure of the fuel tank.

具体而言，当向加注之前的内压为第一压力且加注期间由于液化气体的流入而导致内压降低的所述燃料罐进行加注时，所述加注管理部可以将加注之前和加注期间的所述储存罐的内压保持在所述燃料罐完成加注时的内压以下。Specifically, when filling the fuel tank in which the internal pressure before filling is the first pressure and the internal pressure is lowered due to the inflow of liquefied gas during filling, the filling management section may refill the fuel tank. The internal pressure of the storage tank before and during filling is kept below the internal pressure of the fuel tank when filling is completed.

具体而言，当向加注之前的内压为第二压力且加注期间由于蒸发气体的产生而导致内压升高的所述燃料罐进行加注时，所述加注管理部可以将加注之前和加注期间的所述储存罐的内压保持在所述燃料罐开始加注时的内压以下。Specifically, when filling the fuel tank whose internal pressure before filling is the second pressure and whose internal pressure is increased due to the generation of boil-off gas during filling, the filling management section may The internal pressure of the storage tank before and during refilling is maintained below the internal pressure of the fuel tank at the start of refilling.

具体而言，所述第一压力可以是比所述预设压力大0.05barG至0.1barG的值以上的压力，所述第二压力可以是小于比所述预设压力大0.05barG至0.1barG的值的压力。Specifically, the first pressure may be a pressure greater than the preset pressure by a value of 0.05 barG to 0.1 barG or more, and the second pressure may be less than 0.05 barG to 0.1 barG greater than the preset pressure value pressure.

具体而言，所述第一压力可以为0.5barG至8barG，所述第二压力可以为0.5barG以下。Specifically, the first pressure may be 0.5 barG to 8 barG, and the second pressure may be 0.5 barG or less.

根据本发明一方面的气体处理系统，作为从加注船舶的储存罐向设置在燃气推进船舶的燃料罐输送液化气体的气体处理系统，其特征在于，包括：加注线，将所述储存罐的液化气体供给到所述燃料罐；加注管理部，将所述储存罐的蒸发气体在没有与制冷剂进行热交换的情况下进行压缩、冷却和减压后回流，从而调节所述储存罐的内压；以及蒸发气体回流线，将通过所述加注线进行加注时在所述燃料罐中产生的蒸发气体输送到所述加注船舶，所述加注管理部在加注之前将所述储存罐的内压降低到预设压力以下，在加注期间阻断蒸发气体通过所述蒸发气体回流线的输送，以使所述燃料罐储压，或者将所述储存罐的内压保持在小于所述燃料罐的内压，从而使蒸发气体在通过所述蒸发气体回流线输送时不需要由额外的压缩机压缩。A gas processing system according to an aspect of the present invention, as a gas processing system for transporting liquefied gas from a storage tank of a refueling ship to a fuel tank installed in a gas-propelled ship, is characterized by comprising: a refilling line for connecting the storage tank to The liquefied gas is supplied to the fuel tank; the filling management part compresses, cools and decompresses the evaporated gas of the storage tank without exchanging heat with the refrigerant, and then returns it to adjust the storage tank and a boil-off gas return line to deliver boil-off gas generated in the fuel tank during bunkering through the bunker line to the bunkering vessel, the bunkering management department prior to bunkering The internal pressure of the storage tank is reduced below a preset pressure, and the delivery of boil-off gas through the boil-off gas return line is blocked during filling, so that the fuel tank is pressurized, or the storage tank is under pressure. The internal pressure is maintained below the internal pressure of the fuel tank so that the boil-off gas does not need to be compressed by an additional compressor as it is conveyed through the boil-off gas return line.

具体而言，所述储存罐可以是隔膜型或C型的罐，所述预设压力可以为0.04barG或0.2barG。Specifically, the storage tank may be a diaphragm-type or C-type tank, and the preset pressure may be 0.04 barG or 0.2 barG.

具体而言，所述加注管理部包括蒸发气体换热器，用于使被压缩的蒸发气体和从所述储存罐排出到蒸发气体进行热交换，所述蒸发气体回流线可以将蒸发气体输送到所述储存罐和所述蒸发气体换热器之间。Specifically, the filling management part includes a boil-off gas heat exchanger for exchanging heat between the compressed boil-off gas and the boil-off gas discharged from the storage tank, and the boil-off gas return line can convert the boil-off gas to the boil-off gas. delivered between the storage tank and the boil-off gas heat exchanger.

具体而言，所述蒸发气体回流线可以设置成经由所述蒸发气体换热器或绕过所述蒸发气体换热器而将蒸发气体输送到所述储存罐和所述蒸发气体换热器之间。Specifically, the boil-off gas return line may be arranged to deliver boil-off gas to the storage tank and the boil-off gas heat exchanger via the boil-off gas heat exchanger or bypassing the boil-off gas heat exchanger between.

具体而言，所述加注管理部包括：并联设置的复数个低压压缩机，压缩所述储存罐的蒸发气体并供给到发电引擎；多级的增压压缩机，设置在从所述低压压缩机与所述发电引擎之间分支的位置，将多余的蒸发气体压缩到150barG以上；以及减压阀，对由所述增压压缩机压缩后的蒸发气体进行减压和液化，所述蒸发气体换热器可以在所述增压压缩机和所述减压阀之间利用从所述储存罐排出的蒸发气体来冷却高压的蒸发气体。Specifically, the refueling management unit includes: a plurality of low-pressure compressors installed in parallel to compress the boil-off gas in the storage tank and supply it to a power generation engine; The position of the branch between the compressor and the power generation engine, to compress the excess boil-off gas to more than 150 barG; and a pressure reducing valve to decompress and liquefy the boil-off gas compressed by the booster compressor, and the boil-off gas A heat exchanger may cool high-pressure boil-off gas with boil-off gas discharged from the storage tank between the booster compressor and the pressure-reducing valve.

具体而言，所述加注管理部能够并联地运行复数个所述低压压缩机而吸入所述储存罐的蒸发气体，以在加注之前将所述储存罐的内压降低到预设压力以下。Specifically, the filling management part can operate a plurality of the low-pressure compressors in parallel to suck boil-off gas of the storage tank, so as to reduce the internal pressure of the storage tank to below a preset pressure before filling .

具体而言，所述加注管理部包括：低压压缩机，压缩所述储存罐的蒸发气体并供给到发电引擎；多级的高压压缩机，与所述低压压缩机并联设置，将所述储存罐的蒸发气体压缩到150barG以上；以及减压阀，对由所述高压压缩机压缩后的蒸发气体进行减压和液化，所述蒸发气体换热器可以在所述高压压缩机和所述减压阀之间利用从所述储存罐排出的蒸发气体来冷却高压的蒸发气体，所述高压压缩机可以将中间级的蒸发气体供给到所述发电引擎。Specifically, the filling management unit includes: a low-pressure compressor, which compresses the boil-off gas in the storage tank and supplies it to a power generation engine; The boil-off gas in the tank is compressed to more than 150 barG; and a pressure reducing valve, which decompresses and liquefies the boil-off gas compressed by the high-pressure compressor, and the boil-off gas heat exchanger can be installed between the high-pressure compressor and the reducer. The boil-off gas discharged from the storage tank is used between the pressure valves to cool the high-pressure boil-off gas, and the high-pressure compressor can supply the boil-off gas of the intermediate stage to the power generation engine.

具体而言，所述加注管理部可以根据所述储存罐的液化气体储存量来独立地运行所述低压压缩机和所述高压压缩机。Specifically, the filling management part may operate the low-pressure compressor and the high-pressure compressor independently according to the storage amount of the liquefied gas in the storage tank.

根据本发明一方面的气体处理系统，作为从加注船舶的储存罐向设置在燃气推进船舶的燃料罐输送液化气体的气体处理系统，其特征在于，包括：加注线，将所述储存罐的液化气体供给到所述燃料罐；加注管理部，利用制冷剂使所述储存罐的液化气体过冷后回流，从而调节所述储存罐的内压；以及蒸发气体回流线，将通过所述加注线进行加注时在所述燃料罐中产生的蒸发气体输送到所述加注船舶，所述加注管理部在加注之前将所述储存罐的内压降低到预设压力以下，在加注期间阻断蒸发气体通过所述蒸发气体回流线的输送，以使所述燃料罐储压，或者将所述储存罐的内压保持在小于所述燃料罐的内压，从而使蒸发气体在通过所述蒸发气体回流线输送时不需要由额外的压缩机压缩。A gas processing system according to an aspect of the present invention, as a gas processing system for transporting liquefied gas from a storage tank of a refueling ship to a fuel tank installed in a gas-propelled ship, is characterized by comprising: a refilling line for connecting the storage tank to The liquefied gas is supplied to the fuel tank; the filling management part uses the refrigerant to supercool the liquefied gas in the storage tank and then return it to adjust the internal pressure of the storage tank; and the boil-off gas return line will pass through The boil-off gas generated in the fuel tank when the bunkering line is bunkered is delivered to the bunkering ship, and the bunkering management part reduces the internal pressure of the storage tank to a preset pressure before bunkering Hereinafter, the delivery of boil-off gas through the boil-off gas return line is blocked during refilling to store pressure in the fuel tank, or keep the internal pressure of the storage tank lower than the internal pressure of the fuel tank, Thereby, the boil-off gas does not need to be compressed by an additional compressor when being conveyed through the boil-off gas return line.

具体而言，所述储存罐可以是隔膜型或C型的罐，所述预设压力可以为0.04barG或0.2barG。Specifically, the storage tank may be a diaphragm-type or C-type tank, and the preset pressure may be 0.04 barG or 0.2 barG.

具体而言，所述加注管理部包括：过冷装置，利用制冷剂对液化气体进行过冷；以及制冷剂供给部，向所述过冷装置供给制冷剂，所述制冷剂供给部可以包括制冷剂换热器，所述制冷剂换热器利用从所述储存罐向发电引擎供给的液化气体或蒸发气体来冷却制冷剂。Specifically, the filling management part includes: a subcooling device for subcooling the liquefied gas with a refrigerant; and a refrigerant supply part for supplying the refrigerant to the subcooling device, and the refrigerant supplying part may include A refrigerant heat exchanger that cools a refrigerant by using liquefied gas or boil-off gas supplied from the storage tank to the power generation engine.

具体而言，所述制冷剂供给部可以包括：制冷剂压缩机；制冷剂间换热器，使被压缩的制冷剂和在所述过冷装置中被加热的制冷剂进行热交换；制冷剂膨胀器，使压缩后经由所述制冷剂间换热器的制冷剂膨胀；以及所述制冷剂换热器，利用向所述发电引擎供给的液化气体或蒸发气体来冷却被压缩的制冷剂。Specifically, the refrigerant supply part may include: a refrigerant compressor; an inter-refrigerant heat exchanger for exchanging heat between the compressed refrigerant and the refrigerant heated in the subcooling device; the refrigerant The expander expands the refrigerant compressed and passed through the inter-refrigerant heat exchanger, and the refrigerant heat exchanger cools the compressed refrigerant with the liquefied gas or boil-off gas supplied to the power generation engine.

具体而言，所述制冷剂供给部可以包括：制冷剂压缩机；所述制冷剂换热器，使被压缩的制冷剂、在所述过冷装置中被加热的制冷剂和供给到所述发电引擎的液化气体或蒸发气体进行热交换；以及制冷剂膨胀器，使压缩后经由所述制冷剂换热器的制冷剂膨胀。Specifically, the refrigerant supply part may include: a refrigerant compressor; the refrigerant heat exchanger for supplying the compressed refrigerant, the refrigerant heated in the subcooling device, and the refrigerant to the The liquefied gas or boil-off gas of the power generation engine exchanges heat; and a refrigerant expander expands the refrigerant passing through the refrigerant heat exchanger after being compressed.

根据本发明一方面的气体处理系统的特征在于，作为一种加注船舶，其具有所述气体处理系统。A gas treatment system according to an aspect of the present invention is characterized in that, as a bunkering ship, it has the gas treatment system.

发明效果Invention effect

根据本发明的气体处理系统及包括该气体处理系统的船舶，考虑到从加注船舶向燃气推进船舶输送液化气体时会由液化气体产生蒸发气体，因此提出了一种用于缩短加注时间和效率的技术，从而可以保证安全和稳定的加注。According to the gas processing system of the present invention and the ship including the gas processing system, considering that boil-off gas is generated from the liquefied gas when the liquefied gas is transported from the bunkering ship to the gas-propelled ship, a method for shortening the bunkering time and Efficient technology, thus guaranteeing a safe and stable filling.

附图说明Description of drawings

图1是根据本发明的第一和第二实施例的气体处理系统的工艺流程图。1 is a process flow diagram of a gas processing system according to first and second embodiments of the present invention.

图2是根据本发明的第一实施例的气体处理系统的概念图。FIG. 2 is a conceptual diagram of a gas processing system according to a first embodiment of the present invention.

图3是根据本发明的第一实施例的气体处理系统中的内压变化的曲线图。3 is a graph of changes in internal pressure in the gas processing system according to the first embodiment of the present invention.

图4是根据本发明的第二实施例的气体处理系统的概念图。4 is a conceptual diagram of a gas processing system according to a second embodiment of the present invention.

图5是根据本发明的第二实施例的气体处理系统中的内压变化的曲线图。5 is a graph of changes in internal pressure in a gas processing system according to a second embodiment of the present invention.

图6是根据本发明的第三实施例的气体处理系统的工艺流程图。6 is a process flow diagram of a gas processing system according to a third embodiment of the present invention.

图7是根据本发明的第四实施例的气体处理系统的工艺流程图。7 is a process flow diagram of a gas processing system according to a fourth embodiment of the present invention.

图8是根据本发明的第五实施例的气体处理系统的工艺流程图。8 is a process flow diagram of a gas processing system according to a fifth embodiment of the present invention.

图9是根据本发明的第六实施例的气体处理系统的工艺流程图。9 is a process flow diagram of a gas processing system according to a sixth embodiment of the present invention.

图10是根据本发明的第七实施例的气体处理系统的工艺流程图。10 is a process flow diagram of a gas processing system according to a seventh embodiment of the present invention.

图11是根据本发明的第八实施例的气体处理系统的工艺流程图。11 is a process flow diagram of a gas processing system according to an eighth embodiment of the present invention.

图12是根据本发明的第九实施例的气体处理系统的工艺流程图。12 is a process flow diagram of a gas processing system according to a ninth embodiment of the present invention.

图13是根据本发明的第十实施例的气体处理系统的工艺流程图。13 is a process flow diagram of a gas processing system according to a tenth embodiment of the present invention.

具体实施方式Detailed ways

本发明的目的、特定的优点以及新颖的特征可通过与附图相关的以下详细说明和优选实施例得以更加明确。在本说明书中，在对各个附图的构成要素赋予附图标记时，对于同一构成要素，即使表示在不同的附图中，也尽可能地赋予相同的附图标记。另外，在说明本发明的过程中，若判断针对相关的公知技术的说明不必要地混淆本发明的宗旨，则省略其详细说明。Objects, particular advantages, and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments in connection with the accompanying drawings. In this specification, when assigning reference numerals to components in the respective drawings, the same components are assigned the same reference numerals as much as possible even if they are shown in different drawings. In addition, in the course of describing the present invention, if it is judged that the description of the related known technology unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

以下，参照附图详细描述本发明的优选实施例。作为参考，在本说明书中，液化气体可以是LNG，但不限于此，可以包括由于沸点低于常温而强制液化以用于储存且具有热值的所有物质。Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, in this specification, the liquefied gas may be LNG, but is not limited thereto, and may include all substances that are forced to be liquefied for storage due to a lower boiling point than normal temperature and have a calorific value.

另外，在本说明书中，液化气体/蒸发气体基于罐内部中的状态进行区分，并且不必因名称而限制液相或气相。另外，在本说明书中，高压/低压是相对的，不由数值来限定。In addition, in this specification, liquefied gas/boil off gas is distinguished based on the state in the tank interior, and it is not necessary to limit liquid phase or gas phase by name. In addition, in this specification, high pressure/low pressure is relative, and is not limited by a numerical value.

作为参考，以下通过图1至图5说明的第一、第二实施例将基于以下思想：利用制冷For reference, the first and second embodiments described below with reference to FIGS. 1 to 5 will be based on the idea of utilizing refrigeration 剂使蒸发气体完全再液化以降低加注船舶BV的罐内压，从而减少在加注期间蒸发气体的产The agent can completely reliquefy the boil-off gas to reduce the tank pressure in the BV of the bunkering vessel, thereby reducing the production of boil-off gas during bunkering. 生。pregnancy.

在下文中，将详细说明各个实施例。Hereinafter, various embodiments will be described in detail.

图1是根据本发明的第一和第二实施例的气体处理系统的工艺流程图，图2是根据本发明的第一实施例的气体处理系统的概念图，图3是根据本发明的第一实施例的气体处理系统中的内压变化的曲线图。1 is a process flow diagram of a gas treatment system according to first and second embodiments of the present invention, FIG. 2 is a conceptual diagram of a gas treatment system according to the first embodiment of the present invention, and FIG. 3 is a second embodiment of the present invention. A graph of the change in internal pressure in a gas processing system of an embodiment.

参照图1至图3，根据本发明的第一实施例的气体处理系统是从加注船舶BV的储存罐110向设置于燃气推进船舶GFS的燃料罐210a输送液化气体的加注系统。1 to 3 , the gas processing system according to the first embodiment of the present invention is a refueling system for delivering liquefied gas from a storage tank 110 of a refueling ship BV to a fuel tank 210a provided in a gas-propelled ship GFS.

本发明可以包括具有以下说明的气体处理系统的加注船舶BV。当然，本发明还包括为了实现气体处理系统而结构被特定的燃气推进船舶GFS。作为一例，本发明是应用了以下气体处理系统的燃气推进船舶GFS，可以包括未设置用于将加注期间产生的蒸发气体回流到加注船舶BV的压缩机(尤其H/D compressor：H/D压缩机)的燃气推进船舶GFS。The present invention may include a bunkering vessel BV with a gas treatment system as described below. Of course, the present invention also includes a gas-propelled ship GFS whose structure is specific in order to realize the gas processing system. As an example, the present invention is a gas-propelled ship GFS to which the following gas treatment system is applied, and may include a compressor (especially H/D compressor: H/D compressor: H/ D compressor) gas propulsion ship GFS.

作为参考，燃气推进船舶GFS可以是诸如液化气体运输船以外的商船的散货船、集装箱运输船、矿物运输船等船型，并且可以设置使燃料罐210a中储存的液化气体或蒸发气体在经由燃料处理部220(泵、压缩机、换热器等)而被诸如压缩/加压/加热等之后，通过气体供给线L6供给到推进引擎230的设备。For reference, the gas-propelled ship GFS may be a ship type such as a merchant ship other than a liquefied gas carrier, a bulk carrier, a container carrier, a mineral carrier, and the like, and may be provided so that the liquefied gas or boil-off gas stored in the fuel tank 210a is passed through the fuel tank 210a. After the processing section 220 (pump, compressor, heat exchanger, etc.) is compressed/pressurized/heated, for example, it is supplied to the equipment of the propulsion engine 230 through the gas supply line L6.

气体处理系统可以包括从储存罐110向燃料罐210a供给液化气体的构成。此时，储存罐110是隔膜型或C型的罐，借助设置在储存罐110中的移送泵111，液化气体可以沿着连接储存罐110和燃料罐210a的加注线L1被输送到燃料罐210a。The gas processing system may include a configuration in which liquefied gas is supplied from the storage tank 110 to the fuel tank 210a. At this time, the storage tank 110 is a diaphragm type or C-type tank, and by means of the transfer pump 111 provided in the storage tank 110, the liquefied gas can be transferred to the fuel tank along the filling line L1 connecting the storage tank 110 and the fuel tank 210a 210a.

另外，气体处理系统包括使在向燃料罐210a供给液化气体时在燃料罐210a中产生的蒸发气体回流到加注船舶BV的构成。此时，在本实施例的情况下，燃料罐210a可以是具有约5barG至10barG左右的设计压力的C型，并且可以设置在诸如燃气推进船舶GFS的甲板上部或船内等各种位置处。在燃料罐210a中产生的蒸发气体可以通过蒸发气体回流线L2回流到加注船舶BV，并且可以直接或间接地输送到储存罐110。In addition, the gas processing system includes a configuration in which boil-off gas generated in the fuel tank 210a when the liquefied gas is supplied to the fuel tank 210a is returned to the refueling vessel BV. At this time, in the case of the present embodiment, the fuel tank 210a may be a C-type having a design pressure of about 5 barG to 10 barG, and may be provided in various positions such as the upper deck of the gas-propelled ship GFS or inside the ship. The boil-off gas generated in the fuel tank 210a may be returned to the bunkering vessel BV through the boil-off gas return line L2, and may be directly or indirectly delivered to the storage tank 110.

另外，气体处理系统包括加注管理部120。加注管理部120调节储存罐110的内压，作为一例，可以利用制冷剂(没有限制，诸如氮气、混合制冷剂等)将储存罐110的蒸发气体液化，然后回流到储存罐110以降低储存罐110的内压。In addition, the gas processing system includes a refill management section 120 . The filling management part 120 adjusts the internal pressure of the storage tank 110. As an example, the boil-off gas in the storage tank 110 may be liquefied with a refrigerant (without limitation, such as nitrogen, mixed refrigerant, etc.), and then returned to the storage tank 110 to reduce storage The internal pressure of the tank 110 .

本发明通过提供以下将要详细描述的加注管理部120，对比现有技术可以改善以下部分：在通过加注线L1将储存罐110的液化气体供给到燃料罐210a的加注期间燃料罐210a中的蒸发气体的产生，以及燃料罐210a中生成的蒸发气体向加注船舶BV的回流。The present invention can improve the following part compared to the prior art by providing the filling management part 120 to be described in detail below: during filling of the fuel tank 210a by supplying the liquefied gas of the storage tank 110 through the filling line L1 into the fuel tank 210a The production of boil-off gas in the fuel tank 210a and the backflow of the boil-off gas generated in the fuel tank 210a to the bunkering vessel BV.

具体而言，加注管理部120可以在加注之前将储存罐110的内压降低到预设压力以下。作为一例，加注管理部120可以在通过加注线L1输送液化气体之前，预先将储存罐110的内压降低到诸如0.04barG或0.2barG等预设压力。当然，如果储存罐110的内压已经达到预设压力以下，则可以省略蒸发气体的液化回流。Specifically, the filling management part 120 may reduce the internal pressure of the storage tank 110 to below a preset pressure before filling. As an example, the filling management part 120 may lower the internal pressure of the storage tank 110 to a preset pressure such as 0.04 barG or 0.2 barG in advance before delivering the liquefied gas through the filling line L1. Of course, if the internal pressure of the storage tank 110 has reached below the preset pressure, the liquefied reflux of the boil-off gas may be omitted.

即，本发明通过预先降低加注船舶BV的储存罐110的内压，使得从储存罐110向燃料罐210a输送的液化气体处于充分稳定的液体状态(作为一例，过冷(subcooled)状态)，从而能够减少向燃料罐210a供给液化气体时产生的蒸发气体的量。That is, the present invention reduces the internal pressure of the storage tank 110 for refueling the ship BV in advance, so that the liquefied gas sent from the storage tank 110 to the fuel tank 210a is in a sufficiently stable liquid state (for example, a subcooled state), Therefore, the amount of boil-off gas generated when the liquefied gas is supplied to the fuel tank 210a can be reduced.

此后，当开始加注时，加注管理部120将储存罐110的内压保持在小于燃料罐210a的内压。在这种情况下，燃料罐210a中产生的蒸发气体在通过蒸发气体回流线L2输送到加注船舶BV的过程中不需要由额外的压缩机压缩。即，本发明在加注过程中从燃气推进船舶GFS回流到加注船舶BV的蒸发气体NBOG在不压缩的情况下进行输送(Freeflow：自由流动)。After that, when filling is started, the filling management part 120 keeps the internal pressure of the storage tank 110 lower than the internal pressure of the fuel tank 210a. In this case, the boil-off gas generated in the fuel tank 210a does not need to be compressed by an additional compressor during delivery to the bunkering vessel BV through the boil-off gas return line L2. That is, in the present invention, the boil-off gas NBOG returned from the gas-propelled ship GFS to the bunkering ship BV during the bunkering process is transported without compression (Freeflow).

具体而言，本发明在加注过程中持续处理储存罐110的蒸发气体，从而将储存罐110的内压保持在低于燃料罐210a的内压，以允许蒸发气体在不压缩的情况下从燃料罐210a输送到储存罐110，由此可以省略在加注期间为了蒸发气体回流而设置在燃气推进船舶GFS的高负载压缩机(High-Duty Compressor)。当然，为此，用于测量内压的压力计(未图示)分别设置在储存罐110和燃料罐210a中。Specifically, the present invention continues to process the boil-off gas of the storage tank 110 during the filling process, thereby maintaining the internal pressure of the storage tank 110 lower than the internal pressure of the fuel tank 210a to allow the boil-off gas to escape from the The fuel tank 210a is delivered to the storage tank 110, whereby a high-duty compressor (High-Duty Compressor) provided in the gas-propelled ship GFS for boil-off gas return during refueling can be omitted. Of course, for this purpose, pressure gauges (not shown) for measuring the internal pressure are provided in the storage tank 110 and the fuel tank 210a, respectively.

用于实现这种效果的加注管理部120利用使蒸发气体液化的再液化装置122，并在再液化装置122的上游以并联的形式设置有复数个蒸发气体压缩机121以便能够彼此备用，在再液化装置122的下游设置有压力调节阀123和气液分离器124。The refill management section 120 for achieving this effect utilizes a reliquefaction device 122 that liquefies boil-off gas, and a plurality of boil-off gas compressors 121 are provided in parallel upstream of the reliquefaction device 122 so as to be able to stand by each other. A pressure regulating valve 123 and a gas-liquid separator 124 are provided downstream of the reliquefaction device 122 .

蒸发气体压缩机121、再液化装置122、压力调节阀123以及气液分离器124可以依次设置在以储存罐110为基准形成循环流路的压力调节线L3上，由此，加注管理部120可以压缩和液化储存罐110的蒸发气体，并使其回流到储存罐110，从而能够降低储存罐110的内压。The boil-off gas compressor 121 , the reliquefaction device 122 , the pressure regulating valve 123 , and the gas-liquid separator 124 may be arranged in this order on the pressure regulating line L3 that forms the circulation flow path with the storage tank 110 as a reference, whereby the filling management unit 120 The boil-off gas of the storage tank 110 may be compressed and liquefied and returned to the storage tank 110, so that the internal pressure of the storage tank 110 can be reduced.

另外，本发明为了将储存罐110的内压保持在低压，可以使通过蒸发气体回流线L2输送到加注船舶BV的蒸发气体输送到再液化装置122而再液化之后返回到储存罐110，或可以绕过再液化装置122输送到储存罐110。或者，从燃气推进船舶GFS输送的蒸发气体也可以用于启动发电引擎130，该发电引擎130用于加注船舶BV内的电力消耗。In addition, in the present invention, in order to keep the internal pressure of the storage tank 110 at a low pressure, the boil-off gas sent to the bunkering vessel BV through the boil-off gas return line L2 can be sent to the reliquefaction device 122, and then returned to the storage tank 110 after reliquefaction. Alternatively, it may be delivered to the storage tank 110 bypassing the reliquefaction unit 122 . Alternatively, the boil-off gas delivered from the gas-propelled vessel GFS may also be used to start the power generation engine 130 used to refuel the power consumption within the vessel BV.

为了使储存罐110的内压达到燃料罐210a的内压以下，即，为了使燃料罐210a的内压高于储存罐110的内压，加注管理部120可以使用再液化装置122，从而不会因通过蒸发气体回流线L2输送的蒸发气体直接流入储存罐110而导致储存罐110的内压升高。In order to make the internal pressure of the storage tank 110 be lower than the internal pressure of the fuel tank 210a, that is, to make the internal pressure of the fuel tank 210a higher than the internal pressure of the storage tank 110, the refill management unit 120 may use the reliquefaction device 122 so as not to The internal pressure of the storage tank 110 may increase due to the direct inflow of the boil-off gas sent through the boil-off gas return line L2 into the storage tank 110 .

即，加注管理部120使加注期间回流的蒸发气体再液化并返回到储存罐110，从而能够将储存罐110的内压保持在小于燃料罐210a的内压。此时，蒸发气体回流线L2可以设置成与位于再液化装置122的上游的蒸发气体压缩机121的流入端合流或直接与再液化装置122连接，并当燃料罐210a的内压对应于蒸发气体压缩机121下游的压力时，蒸发气体可以直接从蒸发气体回流线L2输送到再液化装置122。That is, the refueling management part 120 reliquefies the boil-off gas flowing back during refueling and returns it to the storage tank 110 , so that the internal pressure of the storage tank 110 can be kept lower than the internal pressure of the fuel tank 210a. At this time, the boil-off gas return line L2 may be set to merge with the inflow end of the boil-off gas compressor 121 located upstream of the reliquefaction device 122 or directly connected to the reliquefaction device 122, and when the internal pressure of the fuel tank 210a corresponds to the evaporation At the pressure downstream of the gas compressor 121 , the boil-off gas can be sent directly from the boil-off gas return line L2 to the reliquefaction device 122 .

如果储存罐110的内压越低，则移送泵111的负载越大，因此，加注管理部120可以在储存罐110的内压为燃料罐210a的内压以下时，使回流的蒸发气体不被再液化并供给到储存罐110，从而可以使储存罐110的内压升高。The lower the internal pressure of the storage tank 110 is, the greater the load on the transfer pump 111 is. Therefore, when the internal pressure of the storage tank 110 is equal to or lower than the internal pressure of the fuel tank 210a, the refilling management unit 120 can prevent the recirculated boil-off gas from flowing back. It is reliquefied and supplied to the storage tank 110 so that the internal pressure of the storage tank 110 can be raised.

加注船舶BV为了加注而处于停泊的状态下，需要确保较大的电力以启动诸如再液化装置122、蒸发气体压缩机121、移送泵111等，因此，发电引擎130需要在停泊期间启动。此时，发电引擎130可以通过在压力调节线L3中从蒸发气体压缩机121的下游分支出的蒸发气体消耗线L4接收蒸发气体并将其消耗，为此，蒸发气体压缩机121的吐出压力可以对应于发电引擎130的所需压力。When the bunkering vessel BV is berthed for bunkering, it is necessary to secure a large amount of power to start the reliquefaction device 122, boil-off gas compressor 121, transfer pump 111, etc. Therefore, the power generation engine 130 needs to be started during berthing. At this time, the power generation engine 130 may receive and consume the boil-off gas through the boil-off gas consumption line L4 branched from the downstream of the boil-off gas compressor 121 in the pressure regulation line L3, and for this purpose, the discharge pressure of the boil-off gas compressor 121 may be corresponds to the desired pressure of the generator engine 130 .

发电引擎130可以从储存罐110通过液化气体消耗线L5接收经由燃料供给泵112、气化器113的液化气体并将其消耗，但是，在诸如发电引擎130无法启动的情况等状况下，为了消耗储存罐110的蒸发气体，蒸发气体消耗线L4可以追加地与气体燃烧装置140(或锅炉等)连接。The power generation engine 130 may receive and consume the liquefied gas via the fuel supply pump 112 and the vaporizer 113 from the storage tank 110 through the liquefied gas consumption line L5, but, in a situation such as the case where the power generation engine 130 cannot be started, in order to consume The boil-off gas in the storage tank 110 and the boil-off gas consumption line L4 may be additionally connected to the gas combustion device 140 (or a boiler or the like).

通过蒸发气体回流线L2回流的蒸发气体也可以用作诸如发电引擎130等的燃料，此时，蒸发气体回流线L2可以连接到蒸发气体压缩机121的上游，但不限于此。The boil-off gas returned through the boil-off gas return line L2 may also be used as a fuel such as the power generation engine 130, and at this time, the boil-off gas return line L2 may be connected upstream of the boil-off gas compressor 121, but is not limited thereto.

在下文中，参照图3说明加注过程。作为参考，图3中的实线表示初始内压不同的燃料罐210a在加注期间的内压，斜虚线表示被加注的液化气体的量，水平虚线是指储存罐110的内压。Hereinafter, the filling process is explained with reference to FIG. 3 . For reference, the solid line in FIG. 3 represents the internal pressure of the fuel tank 210 a with different initial internal pressures during filling, the oblique dashed line represents the amount of liquefied gas to be filled, and the horizontal dashed line represents the internal pressure of the storage tank 110 .

首先，在加注之前，气体处理系统可以利用再液化装置122将加注船舶BV的储存罐110的内压降低到预设压力以下。此时，预设压力在图3(A)中为0.2barG左右，在图3(B)中为0.04barG左右。First, prior to bunkering, the gas processing system may utilize the reliquefaction device 122 to reduce the internal pressure of the storage tank 110 of the bunkering vessel BV to below a preset pressure. At this time, the preset pressure is about 0.2 barG in FIG. 3(A) and about 0.04 barG in FIG. 3(B).

当储存罐110的内压充分降低时，通过在储存罐110和燃料罐210a之间连接加注线L1来开始加注。燃料罐210a内部可以处于冷却的状态(cool-down)以便接收超低温液化气体，但是，诸如在加注过程中由于热量渗透到燃料罐210a中等因素，燃料罐210a中可能会产生大量的蒸发气体。When the internal pressure of the storage tank 110 is sufficiently reduced, the filling is started by connecting the filling line L1 between the storage tank 110 and the fuel tank 210a. The interior of the fuel tank 210a may be cool-down to receive ultra-low temperature liquefied gas, however, a large amount of boil-off gas may be generated in the fuel tank 210a due to factors such as heat penetration into the fuel tank 210a during refilling.

此时，为了保护燃料罐210a，必须将蒸发气体返回到加注船舶BV，如图3所示，本发明在加注期间始终将储存罐110的内压保持在燃料罐210a的内压以下，从而回流的蒸发气体能够在不压缩的情况下进行输送。At this time, in order to protect the fuel tank 210a, the boil-off gas must be returned to the bunkering vessel BV. As shown in FIG. 3, the present invention always keeps the internal pressure of the storage tank 110 below the internal pressure of the fuel tank 210a during bunkering, The refluxed boil-off gas can thus be transported without compression.

在进行加注的燃料罐210a中，作为一例，加注之前的内压可以是0.2/3.0/6.5barG，但如图3(A)所示，当燃料罐210a的初始压力是3.0barG或6.5barG的情况下，随着供给液化气体，燃料罐210a的内压会逐渐降低。因此，加注完成后的燃气推进船舶GFS处于无需处理燃料罐210a的蒸发气体而可以直接推进的状态。这是因为储存罐110在加注之前降低内压后执行了加注。In the fuel tank 210a to be refilled, as an example, the internal pressure before refilling may be 0.2/3.0/6.5 barG, but as shown in FIG. 3(A), when the initial pressure of the fuel tank 210a is 3.0 barG or 6.5 barG In the case of barG, the internal pressure of the fuel tank 210a gradually decreases as the liquefied gas is supplied. Therefore, the gas-propelled ship GFS after refueling is in a state in which it can be directly propelled without processing the boil-off gas in the fuel tank 210a. This is because the filling of the storage tank 110 is performed after the internal pressure is lowered before filling.

然而，在图3(A)中，燃料罐210a的初始内压可以是0.2barG，这与储存罐110的预设压力相同，在这种情况下，由于燃料罐210a在接收具有相同内压的储存罐110的液化气体的同时生成蒸发气体，因此在加注过程中，所述燃料罐210a的内压会略有升高。However, in FIG. 3(A), the initial internal pressure of the fuel tank 210a may be 0.2 barG, which is the same as the preset pressure of the storage tank 110, in this case, since the fuel tank 210a is receiving a The liquefied gas in the storage tank 110 generates boil-off gas at the same time, so during the filling process, the internal pressure of the fuel tank 210a is slightly increased.

另一方面，在图3(B)的情况下，可以确认到：即使在燃料罐210a的初始内压为0.2barG的情况下，由于将储存罐110的加注之前的内压预设为小于该内压的0.04barG，因此具有三种初始内压的燃料罐210a在加注过程中内压都会降低。On the other hand, in the case of FIG. 3(B), it was confirmed that even when the initial internal pressure of the fuel tank 210a was 0.2 barG, since the internal pressure before the filling of the storage tank 110 was preset to be less than The internal pressure is 0.04 barG, so the internal pressure of the fuel tank 210a with the three initial internal pressures will decrease during the filling process.

在上述所有情况下，加注管理部120都可以保持储存罐110与燃料罐210a之间的压力差，以使蒸发气体可以在不压缩的情况下从燃气推进船舶GFS回流到加注船舶BV。In all of the above cases, the bunker management 120 can maintain the pressure difference between the storage tank 110 and the fuel tank 210a so that the boil-off gas can flow back from the gas-propelled vessel GFS to the bunker vessel BV without compression.

具体而言，当向加注之前的内压为第一压力且在加注期间因液化气体的流入而导致内压降低的燃料罐210a进行加注时(图3(A)，燃料罐210a的内压为3.0/6.5barG的情况和图3(B)的所有情况)，加注管理部120可以在加注之前和加注期间将储存罐110的内压保持在燃料罐210a加注完成时的内压(约0.5bar左右)以下。Specifically, when refilling is performed to the fuel tank 210a whose internal pressure before refilling is the first pressure and whose internal pressure is lowered due to the inflow of liquefied gas during refilling ( FIG. 3(A) , the pressure of the fuel tank 210a is The case where the internal pressure is 3.0/6.5 barG and all the cases of FIG. 3(B)), the filling management part 120 can maintain the internal pressure of the storage tank 110 before and during the filling at the time when the filling of the fuel tank 210a is completed The internal pressure (about 0.5bar) or less.

另一方面，当向加注之前的内压为第二压力且在加注期间因产生蒸发气体而导致内压升高的燃料罐210a进行加注时(图3(A)中，燃料罐210a的内压为0.2barG时)，加注管理部120可以在加注之前和加注期间将储存罐110的内压保持在燃料罐210a开始加注时的内压(0.2barG)以下。On the other hand, when filling is performed to the fuel tank 210a in which the internal pressure before the filling is the second pressure and the internal pressure is increased due to the generation of boil-off gas during the filling (in FIG. 3(A), the fuel tank 210a When the internal pressure of the fuel tank 210a is 0.2 barG), the filling management part 120 can keep the internal pressure of the storage tank 110 below the internal pressure (0.2 barG) when the fuel tank 210a starts filling before and during the filling.

此时，第一压力是比预设压力大0.05barG至0.1barG的值以上的压力，即可以是0.5barG至8barG，第二压力是小于比预设压力大0.05barG至0.1barG的值的压力，即可以是0.5barG以下，但是数值不限于此。At this time, the first pressure is a pressure higher than the preset pressure by a value of 0.05barG to 0.1barG or more, that is, it may be 0.5barG to 8barG, and the second pressure is a pressure smaller than the preset pressure by a value of 0.05barG to 0.1barG , that is, it may be 0.5 barG or less, but the value is not limited to this.

如上所述，在本实施例中，通过在加注之前预先降低储存罐110的内压，从而可以减少加注期间在燃料罐210a产生的蒸发气体，并且，通过将储存罐110的内压保持在燃料罐210a的内压以下，使得燃料罐210a的蒸发气体在不压缩的情况下回流到加注船舶BV，从而可以省略燃气推进船舶GFS的H/D压缩机。As described above, in the present embodiment, by reducing the internal pressure of the storage tank 110 in advance before filling, the boil-off gas generated in the fuel tank 210a during the filling can be reduced, and by maintaining the internal pressure of the storage tank 110 Below the internal pressure of the fuel tank 210a, the boil-off gas of the fuel tank 210a is allowed to flow back to the bunkering vessel BV without being compressed, so that the H/D compressor of the gas propulsion vessel GFS can be omitted.

图4是根据本发明的第二实施例的气体处理系统的概念图，图5是根据本发明的第二实施例的气体处理系统中的内压变化的曲线图。4 is a conceptual diagram of a gas processing system according to a second embodiment of the present invention, and FIG. 5 is a graph of changes in internal pressure in the gas processing system according to the second embodiment of the present invention.

参照图1、图4以及图5，本发明的第二实施例与上述实施例相比不同之处在于燃料罐210b以隔膜型设置。在下文中，主要根据与上述实施例不同的方面来说明本实施例，并且以下省略的说明由上述内容代替，并且这在后述的其他实施例中也是相同的。Referring to FIGS. 1 , 4 and 5 , the second embodiment of the present invention is different from the above-described embodiments in that the fuel tank 210 b is provided in a diaphragm type. Hereinafter, the present embodiment will be mainly described in terms of different aspects from the above-described embodiment, and the description omitted below is replaced by the above-described content, and this is also the same in other embodiments described later.

如图4所示，本实施例的燃气推进船舶GFS可以是诸如集装箱运输船等，并可以在船内搭载燃料罐210b，此时，燃料罐210b可以是隔膜型。或者，也可以是作为具有与隔膜型的设计压力相同/相似的设计压力的独立式罐的B型(作为自立方型的SPB等)。As shown in FIG. 4 , the gas-propelled ship GFS of the present embodiment may be, for example, a container carrier, and may carry a fuel tank 210b in the ship. In this case, the fuel tank 210b may be of a diaphragm type. Alternatively, it may be a B-type (such as a self-cubic-type SPB) that is an independent tank having the same/similar design pressure as the diaphragm type.

在下文中，参照图5说明本实施例的加注过程。作为参考，类似于图3，在图5中，实线表示初始内压不同的燃料罐210b在加注期间的内压，斜虚线表示被加注的液化气体的量，水平虚线是指储存罐110的内压。Hereinafter, the filling process of the present embodiment will be explained with reference to FIG. 5 . For reference, similar to FIG. 3 , in FIG. 5 , the solid line represents the internal pressure of the fuel tank 210b during filling with different initial internal pressures, the oblique dashed line represents the amount of liquefied gas to be filled, and the horizontal dashed line refers to the storage tank 110 internal pressure.

气体处理系统可以在加注之前将储存罐110的内压降低到预设压力以下，此时，预设压力在图5(A)中为0.2barG左右，在图5(B)中为0.04barG左右。The gas processing system can reduce the internal pressure of the storage tank 110 to below the preset pressure before filling, and at this time, the preset pressure is about 0.2 barG in FIG. 5(A) and 0.04 barG in FIG. 5(B) about.

预先降低储存罐110的内压，然后开始加注，然而在第二实施例的情况下，与第一实施例相同，加注期间，始终将储存罐110的内压保持在燃料罐210b的内压以下，由此，蒸发气体可以在不需要由HD压缩机压缩的情况下从燃料罐210b回流到加注船舶BV。The internal pressure of the storage tank 110 is reduced in advance, and then the filling is started, however, in the case of the second embodiment, the internal pressure of the storage tank 110 is always maintained within the fuel tank 210b during the filling, as in the first embodiment. pressure, whereby boil-off gas can flow back from the fuel tank 210b to the bunkering vessel BV without being compressed by the HD compressor.

这里，在燃料罐210b的内压中，加注之前的内压可以是0.63/0.2/0.05barG，当在储存罐110的加注之前的内压为0.2barG的图5(A)中燃料罐210b的内压为0.63barG的情况下，以及在储存罐110的加注之前的内压为0.04barG的图5(B)中燃料罐210b的内压为0.63/0.2barG的情况下，随着供给液化气体，燃料罐210b的内压逐渐降低。Here, among the internal pressures of the fuel tank 210b, the internal pressure before filling may be 0.63/0.2/0.05 barG, when the internal pressure before filling of the storage tank 110 is 0.2 barG in the fuel tank of FIG. 5(A) When the internal pressure of the fuel tank 210b is 0.63 barG and the internal pressure of the fuel tank 210b is 0.63/0.2 barG in FIG. 5(B) where the internal pressure before the filling of the storage tank 110 is 0.04 barG, as When the liquefied gas is supplied, the internal pressure of the fuel tank 210b gradually decreases.

这种情况是向加注之前的内压为第一压力(0.5barG至1barG，是比预设压力大0.05barG至0.1barG的值以上的压力)且在加注期间因液化气体的流入而导致内压降低的燃料罐210b进行加注的情况，加注管理部120可以将加注之前和加注期间的储存罐110的内压保持在燃料罐210b完成加注时的内压(约0.5bar左右)以下。This is the case when the internal pressure before filling is the first pressure (0.5 barG to 1 barG, which is a pressure greater than the preset pressure by a value of 0.05 barG to 0.1 barG or more) and is caused by the inflow of liquefied gas during filling When the fuel tank 210b whose internal pressure is lowered is filled, the filling management unit 120 may maintain the internal pressure of the storage tank 110 before and during the filling at the internal pressure (about 0.5 bar) when the fuel tank 210b is filled. left and right) or below.

另一方面，当在储存罐110的加注之前的内压为0.2barG的图5(A)中燃料罐210b的内压为0.2barG的情况下，以及在储存罐110的加注之前的内压为0.04barG的图5(B)中燃料罐210b的内压为0.05barG的情况下，燃料罐210b在接收内压相同/相似的储存罐110的液化气体的同时产生蒸发气体，因此在加注过程中，所述燃料罐210b的内压可能会略有升高。On the other hand, when the internal pressure of the fuel tank 210b is 0.2 barG in FIG. 5(A) where the internal pressure before the filling of the storage tank 110 is 0.2 barG, and the internal pressure before the filling of the storage tank 110 is 0.2 barG In the case where the internal pressure of the fuel tank 210b in FIG. 5(B) is 0.05 barG with a pressure of 0.04 barG, the fuel tank 210b generates boil-off gas while receiving the liquefied gas from the storage tank 110 with the same/similar internal pressure. During the injection process, the internal pressure of the fuel tank 210b may slightly increase.

这种情况是向加注之前的内压为第二压力(0.5barG以下，是小于比预设压力大0.05barG至0.1barG的值的压力)且在加注期间因蒸发气体的产生而导致内压升高的燃料罐210b进行加注的情况，加注管理部120可以将加注之前和加注期间的储存罐110的内压保持在燃料罐210b开始加注时的内压(0.2barG)以下。This is the case when the internal pressure before the filling is the second pressure (0.5 barG or less, which is a pressure smaller than the preset pressure by a value of 0.05 to 0.1 barG) and the internal pressure is caused by the generation of boil-off gas during the filling In the case where the fuel tank 210b whose pressure is raised is filled, the filling management section 120 can maintain the internal pressure of the storage tank 110 before and during the filling at the internal pressure (0.2 barG) at the time when the fuel tank 210b starts filling the following.

然而，在本实施例中，在储存罐110的加注之前的内压为0.2barG的图5(A)中，存在燃料罐210b的加注之前的内压为0.05barG以下的情况，并且在这种情况下，处于在加注之前内压降低到预设压力以下的储存罐110的压力大于加注之前的燃料罐210b的内压的压力的情况，因此执行与第一实施例不同的处理。However, in the present embodiment, in FIG. 5(A) where the internal pressure before the filling of the storage tank 110 is 0.2 barG, there is a case where the internal pressure before the filling of the fuel tank 210 b is 0.05 barG or less, and in FIG. In this case, in the case where the pressure of the storage tank 110 whose internal pressure has dropped below the preset pressure before the filling is greater than the pressure of the internal pressure of the fuel tank 210b before the filling, a process different from that of the first embodiment is performed. .

此时，在加注初始阶段，储存罐110的内压形成为高于燃料罐210b的内压，因此蒸发气体不能实现freeflow(自由流动)回流。因此，在本实施例中，从开始加注到预定时刻为止，将阻断蒸发气体通过蒸发气体回流线L2的输送，以使燃料罐210b储压。At this time, in the initial stage of filling, the internal pressure of the storage tank 110 is formed to be higher than the internal pressure of the fuel tank 210b, so that the boil-off gas cannot achieve freeflow backflow. Therefore, in the present embodiment, from the start of filling to a predetermined time, the delivery of the boil-off gas through the boil-off gas return line L2 is blocked, so that the fuel tank 210b is pressurized.

当蒸发气体的回流被阻断时，燃料罐210b的内压由于蒸发气体的产生而逐渐升高，并且从燃料罐210b的内压超过储存罐110的内压时的预定时间开始到完成加注时为止，与上述实施例相同，可以利用加注管理部120将储存罐110的内压保持在小于燃料罐210b的内压，以使蒸发气体在不需要压缩的情况下通过蒸发气体回流线L2输送。When the backflow of the boil-off gas is blocked, the internal pressure of the fuel tank 210b is gradually increased due to the generation of the boil-off gas, and starts from a predetermined time when the internal pressure of the fuel tank 210b exceeds the internal pressure of the storage tank 110 until the filling is completed As in the above-mentioned embodiment, the internal pressure of the storage tank 110 can be kept lower than the internal pressure of the fuel tank 210b by the refueling management unit 120, so that the boil-off gas can pass through the boil-off gas return line without being compressed. L2 delivery.

即，在本实施例中，考虑到当向设计压力为大气压水平的燃料罐210b加注时，在即使预先降低了储存罐110的内压也会高于燃料罐210b的加注之前的内压的状况下开始加注的情况发生，可以控制成使燃料罐210b的内压在开始加注的一定时间内因储压而升高，并超过储存罐110的内压。That is, in the present embodiment, it is considered that when the fuel tank 210b whose design pressure is at the atmospheric pressure level is filled, the internal pressure of the storage tank 110 is higher than the internal pressure before the filling of the fuel tank 210b even if the internal pressure of the storage tank 110 is lowered in advance. In the case of starting the filling under the same conditions, the internal pressure of the fuel tank 210b can be controlled so that the internal pressure of the fuel tank 210b increases due to the accumulating pressure within a certain period of time when the filling is started, and exceeds the internal pressure of the accumulating tank 110 .

具体而言，加注管理部120可以从加注开始到预定时刻为止将蒸发气体的回流阻断，并在从预定时刻起至加注完成时刻之间，使回流的蒸发气体再液化后返回到储存罐110，从而将储存罐110的内压保持在小于燃料罐210b的内压。Specifically, the refilling management unit 120 may block the backflow of boil-off gas from the start of refilling to a predetermined time, and reliquefy the reflowed boil-off gas from the predetermined time to the completion time of refilling and return it to the storage tank 110, thereby maintaining the internal pressure of the storage tank 110 lower than the internal pressure of the fuel tank 210b.

如上所述，本实施例用于对隔膜型的燃料罐210b实施加注，并且当在加注开始时的储存罐110的内压高于燃料罐210b的内压的情况下，可以对燃料罐210b实施部分储压控制，从而在蒸发气体回流时不需要使用压缩机。As described above, the present embodiment is used to perform refilling of the diaphragm-type fuel tank 210b, and when the internal pressure of the storage tank 110 at the start of refilling is higher than the internal pressure of the fuel tank 210b, it is possible to refill the fuel tank 210b. 210b implements partial storage pressure control so that no compressor is required for the boil-off gas return.

作为参考，以下参考图6和图7说明的第三、第四实施例将基于以下思想：通过压For reference, the third and fourth embodiments described below with reference to FIGS. 6 and 7 will be based on the following idea: 缩/热交换/减压使蒸发气体部分再液化以降低加注船舶BV的罐的内压，从而减少在加注期Shrinkage/heat exchange/decompression to partially reliquefy the boil-off gas to reduce the internal pressure of the tank bunkering the ship's BV, thereby reducing the bunkering period 间产生蒸发气体。Evaporate gas is produced.

在下文中，将详细说明每个实施例。Hereinafter, each embodiment will be described in detail.

图6是根据本发明的第三实施例的气体处理系统的工艺流程图。6 is a process flow diagram of a gas processing system according to a third embodiment of the present invention.

参照图6，在根据本发明的第三实施例的气体处理系统中，代替设置了利用制冷剂使蒸发气体液化后回流的再液化装置122的加注管理部120(或除此之外)，可以设置在没有与制冷剂进行热交换的情况下对储存罐110的蒸发气体进行压缩、冷却、减压后回流以调节储存罐110的内压的加注管理部120。Referring to FIG. 6, in the gas processing system according to the third embodiment of the present invention, in place of the refill management section 120 (or in addition to this) provided with a reliquefaction device 122 that liquefies boil-off gas with refrigerant and returns it, The charging management unit 120 may be provided to adjust the internal pressure of the storage tank 110 by compressing, cooling, decompressing and then returning the boil-off gas in the storage tank 110 without exchanging heat with the refrigerant.

但是，在包括本实施例的以下实施例中，加注管理部120的以下控制与上述实施例相同：在加注之前，将储存罐110的内压降低到预设压力(0.04/0.2barG左右)以下，并在加注时阻断蒸发气体的回流，以使燃料罐210a、210b被储压，或者保持储存罐110内压＜燃料罐210a、210b内压，以便蒸发气体在加注期间被输送时无需压缩。However, in the following embodiments including the present embodiment, the following control of the filling management section 120 is the same as the above-mentioned embodiment: before filling, the internal pressure of the storage tank 110 is lowered to a preset pressure (about 0.04/0.2 barG) ) or below, and block the backflow of boil-off gas during filling, so that the fuel tanks 210a, 210b are stored under pressure, or keep the internal pressure of the storage tank 110 < the internal pressure of the fuel tanks 210a, 210b, so that the boil-off gas is stored during filling No compression required for delivery.

加注管理部120包括低压压缩机121a、增压压缩机121b、蒸发气体换热器125、减压阀123、气液分离器124，并且压力调节线L3以储存罐110为基准形成循环流路，并且上述构成可以依次串联连接。The filling management unit 120 includes a low-pressure compressor 121a, a booster compressor 121b, a boil-off gas heat exchanger 125, a pressure-reducing valve 123, and a gas-liquid separator 124, and the pressure regulating line L3 forms a circulation flow path based on the storage tank 110 , and the above structures can be sequentially connected in series.

复数个低压压缩机121a以并联的形式设置，压缩储存罐110的蒸发气体后供给到发电引擎130。为此，从低压压缩机121a的下游分支出蒸发气体消耗线L4并与诸如发电引擎130等连接，低压压缩机121a可以具有适合于发电引擎130所需压力的吐出压力。A plurality of low-pressure compressors 121 a are provided in parallel, and the boil-off gas in the storage tank 110 is compressed and supplied to the power generation engine 130 . To this end, the boil-off gas consumption line L4 is branched from the downstream of the low pressure compressor 121a, which may have a discharge pressure suitable for the pressure required by the power generation engine 130, and is connected to, for example, the power generation engine 130.

增压压缩机121b可以设置成多级，并且设置在低压压缩机121a和发电引擎130之间的分支位置(以压力调节线L3为基准的低压压缩机121a的下游)，以将多余的蒸发气体压缩到150barG以上。The booster compressor 121b may be provided in multiple stages, and is provided at a branch position between the low-pressure compressor 121a and the power generation engine 130 (downstream of the low-pressure compressor 121a with reference to the pressure regulation line L3) to remove excess boil-off gas Compression above 150barG.

本实施例在不进行与制冷剂的热交换的情况下将蒸发气体压缩后减压，为了液化而利用焦耳-汤姆森效应，为此，蒸发气体减压之前的压力应在150barG以上。因此，在本实施例中，为了向发电引擎130供给蒸发气体而设置了低压压缩机121a的同时，另外设置增压压缩机121b，以借助减压使蒸发气体液化。In this embodiment, the boil-off gas is compressed and then decompressed without exchanging heat with the refrigerant, and the Joule-Thomson effect is used for liquefaction. Therefore, the pressure of the boil-off gas before decompression should be 150 barG or more. Therefore, in the present embodiment, the low-pressure compressor 121a is provided to supply the boil-off gas to the generator engine 130, and the booster compressor 121b is also provided to liquefy the boil-off gas by decompression.

蒸发气体换热器125可以使由增压压缩机121b压缩的蒸发气体与从储存罐110排出的蒸发气体进行热交换，以冷却被压缩的高压蒸发气体。另一方面，从储存罐110排出的蒸发气体在蒸发气体换热器125中通过热交换而被稍微加热，因此低压压缩机121a的流入温度升高，从而可以升高低压压缩机121a应承受的温度。The boil-off gas heat exchanger 125 may exchange heat between the boil-off gas compressed by the booster compressor 121b and the boil-off gas discharged from the storage tank 110 to cool the compressed high-pressure boil-off gas. On the other hand, the boil-off gas discharged from the storage tank 110 is slightly heated by heat exchange in the boil-off gas heat exchanger 125, so that the inflow temperature of the low-pressure compressor 121a increases, so that it is possible to increase the amount of the low-pressure compressor 121a to withstand. temperature.

蒸发气体换热器125具备具有至少两个流的结构，以使从储存罐110向低压压缩机121a输送的蒸发气体流和从增压压缩机121b向减压阀123输送的高压蒸发气体流彼此进行热交换。The boil-off gas heat exchanger 125 has a structure having at least two flows so that the boil-off gas flow sent from the storage tank 110 to the low-pressure compressor 121a and the high-pressure boil-off gas flow sent from the booster compressor 121b to the pressure reducing valve 123 are mutually heat exchange.

此时，由于蒸发气体回流线L2设置成将蒸发气体输送到储存罐110和蒸发气体换热器125之间，因此，从储存罐110向低压压缩机121a输送的流可以是由储存罐110的蒸发气体与燃料罐210a、210b的蒸发气体混合而形成的。At this time, since the boil-off gas return line L2 is set to deliver the boil-off gas between the storage tank 110 and the boil-off gas heat exchanger 125, the flow sent from the storage tank 110 to the low-pressure compressor 121a may be the flow delivered by the storage tank 110 to the low-pressure compressor 121a. The boil-off gas is mixed with the boil-off gas of the fuel tanks 210a and 210b.

除此之外，蒸发气体换热器125可以进一步包括经由蒸发气体回流线L2的流，以使通过蒸发气体回流线L2输送的燃料罐210a、210b的蒸发气体能够进行热交换。即，蒸发气体回流线L2在经由蒸发气体换热器125之后，可以与储存罐110和低压压缩机121a之间的压力调节线L3合流。In addition to this, the boil-off gas heat exchanger 125 may further include a flow via the boil-off gas return line L2 to enable heat exchange of the boil-off gas of the fuel tanks 210a, 210b conveyed through the boil-off gas return line L2. That is, after passing through the boil-off gas heat exchanger 125, the boil-off gas return line L2 may merge with the pressure regulating line L3 between the storage tank 110 and the low-pressure compressor 121a.

然而，蒸发气体回流线L2可以设置成绕过蒸发气体换热器125，因此蒸发气体回流线L2可以设置成经由或绕过蒸发气体换热器125以将蒸发气体输送到储存罐110和蒸发气体换热器125之间。However, the boil-off gas return line L2 may be provided to bypass the boil-off gas heat exchanger 125, and thus the boil-off gas return line L2 may be provided to pass through or bypass the boil-off gas heat exchanger 125 to deliver the boil-off gas to the storage tank 110 and Between the boil-off gas heat exchangers 125 .

此时，蒸发气体回流线L2绕过蒸发气体换热器125的情况是不需要利用从燃气推进船舶GFS被回收的蒸发气体的冷热的情况，因此可以是诸如不向发电引擎130供给所述蒸发气体且剩余的多余蒸发气体少或没有的情况等。At this time, when the boil-off gas return line L2 bypasses the boil-off gas heat exchanger 125, it is not necessary to utilize the heat and cold of the boil-off gas recovered from the gas-propelled ship GFS, and therefore, for example, the power generation engine 130 may not be supplied with all the heat and cold. The case where the boil-off gas is described and the remaining excess boil-off gas is little or no, etc.

减压阀123对由增压压缩机121b压缩且由蒸发气体换热器125冷却的蒸发气体进行减压后液化。减压阀123可以将压缩至150barG以上后冷却的蒸发气体减压至1至10barG，以使蒸发气体的至少一部分液化。The decompression valve 123 decompresses and liquefies the boil-off gas compressed by the booster compressor 121b and cooled by the boil-off gas heat exchanger 125 . The decompression valve 123 may decompress the cooled boil-off gas compressed to 150 barG or more to 1 to 10 barG to liquefy at least a part of the boil-off gas.

气液分离器124对液化的蒸发气体进行气液分离，使得液相(LBOG)回流到储存罐110，而气相(flash gas)可以与从储存罐110输送到蒸发气体换热器125的蒸发气体混合。The gas-liquid separator 124 performs gas-liquid separation on the liquefied boil-off gas, so that the liquid phase (LBOG) is returned to the storage tank 110 , and the flash gas can be mixed with the boil-off gas sent from the storage tank 110 to the boil-off gas heat exchanger 125 mix.

或者，由气液分离器124分离出的气相不与蒸发气体合流，而是在蒸发气体换热器125中通过单独的流来流动并进行热交换，然后可以在低压压缩机121a的上游与蒸发气体合流或由诸如发电引擎130或锅炉等消耗。Alternatively, the gas phase separated by the gas-liquid separator 124 is not combined with the boil-off gas, but flows and exchanges heat in a separate stream in the boil-off gas heat exchanger 125, and can then be combined with the boil-off gas upstream of the low pressure compressor 121a The gas is combined or consumed by, for example, a power generation engine 130 or a boiler.

这种本实施例的加注管理部120构成包括由复数个并联配置的低压压缩机121a加上增压压缩机121b的蒸发气体压缩机121，为了在加注之前将储存罐110的内压降低到预设压力以下，可以通过并联地运行复数个低压压缩机121a以充分吸入储存罐110的蒸发气体，从而快速降低储存罐110的内压。The refill management unit 120 of the present embodiment constitutes a boil-off gas compressor 121 including a plurality of low-pressure compressors 121a and a booster compressor 121b arranged in parallel, in order to reduce the internal pressure of the storage tank 110 before refilling Below the preset pressure, the internal pressure of the storage tank 110 can be rapidly reduced by operating a plurality of low-pressure compressors 121a in parallel to sufficiently suck the boil-off gas of the storage tank 110 .

因此，本实施例可以在加注之前快速且充分地降低储存罐110的内压，从而减少加注期间在储存罐110中产生的蒸发气体的量，以提高加注效率。Therefore, the present embodiment can quickly and sufficiently reduce the internal pressure of the storage tank 110 before filling, thereby reducing the amount of boil-off gas generated in the storage tank 110 during filling to improve filling efficiency.

图7是根据本发明的第四实施例的气体处理系统的工艺流程图。7 is a process flow diagram of a gas processing system according to a fourth embodiment of the present invention.

参照图7，在根据本发明的第四实施例的气体处理系统中，加注管理部120的蒸发气体压缩机121可以以与上述第三实施例不同的方式构成。Referring to FIG. 7 , in the gas processing system according to the fourth embodiment of the present invention, the boil-off gas compressor 121 of the filling management section 120 may be configured in a manner different from that of the third embodiment described above.

本实施例的加注管理部120设置了用于向发电引擎130供给蒸发气体的低压压缩机121a，以及利用焦耳-汤姆森效应使蒸发气体液化的高压压缩机121c，且可以将低压压缩机121a和高压压缩机121c并联地设置。The filling management part 120 of the present embodiment is provided with a low-pressure compressor 121a for supplying boil-off gas to the power generation engine 130, and a high-pressure compressor 121c for liquefying boil-off gas using the Joule-Thomson effect, and the low-pressure compressor 121a can It is provided in parallel with the high pressure compressor 121c.

此时，高压压缩机121c的中间级连接有蒸发气体消耗线L4，以从中间级将压缩的蒸发气体供给到发电引擎130，由此，低压压缩机121a可以利用以多级设置的高压压缩机121c的一部分作为备用。At this time, boil-off gas consumption line L4 is connected to the intermediate stage of the high-pressure compressor 121c to supply the compressed boil-off gas from the intermediate stage to the power generation engine 130, whereby the low-pressure compressor 121a can utilize high-pressure compressors provided in multiple stages Part of 121c as a spare.

本实施例的加注管理部120可以利用高压压缩机121c将蒸发气体加压至150barG以上，然后在蒸发气体换热器125中利用从储存罐110排出的蒸发气体进行冷却，并且经由减压阀123、气液分离器124回流到储存罐110。The filling management part 120 of the present embodiment can use the high-pressure compressor 121c to pressurize the boil-off gas to 150 barG or more, and then use the boil-off gas discharged from the storage tank 110 for cooling in the boil-off gas heat exchanger 125, and pass through the pressure reducing valve. 123. The gas-liquid separator 124 is returned to the storage tank 110.

此时，加注管理部120可以根据储存罐110的液化气体的储存量，选择低压压缩机121a和高压压缩机121c中的一个并独立地运行。作为一例，当储存罐110的液化气体的储存量多时(诸如蒸发气体量多的Laden voyage(满载航行)等)，可以利用高压压缩机121c将中间级的一部分蒸发气体供给到发电引擎130，并且可以使最终级的蒸发气体再液化后回流到储存罐110，另一方面，当储存罐110的液化气体的储存量少时(诸如蒸发气体量少的Ballast voyage(压载航行)等)，可以利用低压压缩机121a使蒸发气体被诸如发电引擎130等消耗并防止所述蒸发气体回流到储存罐110。At this time, the filling management part 120 may select one of the low-pressure compressor 121a and the high-pressure compressor 121c according to the storage amount of the liquefied gas in the storage tank 110 and operate independently. As an example, when the storage volume of the liquefied gas in the storage tank 110 is large (such as Laden voyage (full load voyage) with a large amount of boil-off gas), a part of the boil-off gas in the intermediate stage may be supplied to the power generation engine 130 by the high-pressure compressor 121c, and The final stage boil-off gas can be re-liquefied and returned to the storage tank 110. On the other hand, when the storage volume of the liquefied gas in the storage tank 110 is small (such as Ballast voyage (ballast voyage) with a small boil-off gas volume), it is possible to The low pressure compressor 121a is used to consume the boil-off gas by, for example, the power generation engine 130 and prevent the back-flow of the boil-off gas to the storage tank 110 .

如上所述，本实施例可以将用于利用减压来实现蒸发气体的液化的高压压缩机121c和用于向发电引擎130供给蒸发气体的低压压缩机121a并联设置，并根据航行状态选择高压压缩机121c和低压压缩机121a中的任一个来运行，从而提高蒸发气体压缩机121的运行效率。As described above, in this embodiment, the high-pressure compressor 121c for liquefying boil-off gas by decompression and the low-pressure compressor 121a for supplying boil-off gas to the generator engine 130 can be arranged in parallel, and the high-pressure compressor can be selected according to the sailing state Either one of the compressor 121c and the low-pressure compressor 121a is operated, thereby improving the operation efficiency of the boil-off gas compressor 121.

作为参考，以下参考图8至图10说明的第五至第七实施例将基于以下思想：利用制For reference, the fifth to seventh embodiments described below with reference to FIGS. 8 to 10 will be based on the following idea: 冷剂对液化气体进行过冷回流，降低加注船舶BV的罐的内压，从而减少在加注期间产生的The refrigerant reflows the liquefied gas with subcooling, reducing the internal pressure of the tank in which the ship's BV is filled, thereby reducing the amount of gas generated during the bunkering. 蒸发气体。Evaporate gas.

在下文中，将详细说明每个实施例。Hereinafter, each embodiment will be described in detail.

图8是根据本发明的第五实施例的气体处理系统的工艺流程图。8 is a process flow diagram of a gas processing system according to a fifth embodiment of the present invention.

参照图8，在根据本发明的第五实施例的气体处理系统中，代替加注管理部120使蒸发气体利用制冷剂完全再液化或通过压缩/冷却/减压而部分地再液化，可以通过利用制冷剂对液化气体进行过冷后回流来调节储存罐110的内压。Referring to FIG. 8 , in the gas processing system according to the fifth embodiment of the present invention, instead of the charging management part 120, the boil-off gas is completely reliquefied with a refrigerant or partially reliquefied by compression/cooling/decompression, which can be achieved by The internal pressure of the storage tank 110 is adjusted by subcooling the liquefied gas with the refrigerant and returning it.

为此，加注管理部120包括过冷装置126和制冷剂供给部127。过冷装置126可以用制冷剂对液化气体进行过冷，被过冷的液化气体的温度可以是低于在大气压下的液化气体的沸点(-163摄氏度)的温度(作为一例，-170摄氏度左右)。To this end, the charging management part 120 includes a subcooling device 126 and a refrigerant supply part 127 . The subcooling device 126 may supercool the liquefied gas with a refrigerant, and the temperature of the supercooled liquefied gas may be lower than the boiling point (-163 degrees Celsius) of the liquefied gas under atmospheric pressure (for example, about -170 degrees Celsius). ).

制冷剂供给部127可以将诸如氮气或混合制冷剂之类的不受限制的物质作为制冷剂供给到过冷装置126，以实现液化气体的过冷。制冷剂供给部127包括制冷剂压缩机1271、制冷剂冷却器1272、制冷剂膨胀器1273、制冷剂换热器1274、制冷剂间换热器1275，并且制冷剂循环线L7依次连接上述构成而形成制冷剂循环的流路。The refrigerant supply part 127 may supply an unrestricted substance such as nitrogen gas or mixed refrigerant as a refrigerant to the subcooling device 126 to achieve subcooling of the liquefied gas. The refrigerant supply unit 127 includes a refrigerant compressor 1271, a refrigerant cooler 1272, a refrigerant expander 1273, a refrigerant heat exchanger 1274, and an inter-refrigerant heat exchanger 1275, and the refrigerant circulation line L7 is sequentially connected to the above-mentioned structures. A flow path for the refrigerant circulation is formed.

制冷剂压缩机1271压缩制冷剂。被压缩的制冷剂的压力可以是10barG左右，但不限于此，可以使用各种数值的压力来提高过冷效率。The refrigerant compressor 1271 compresses the refrigerant. The pressure of the compressed refrigerant may be about 10 barG, but it is not limited to this, and various values of pressure can be used to improve the supercooling efficiency.

制冷剂冷却器1272可以利用各种冷能来冷却由制冷剂压缩机1271压缩并被加热的制冷剂。制冷剂冷却器1272设置在制冷剂压缩机1271的下游，并且当制冷剂压缩机1271设置成多级时，所述制冷剂冷却器1272也可以设置在制冷剂压缩机1271的每一级中。The refrigerant cooler 1272 may cool the refrigerant compressed and heated by the refrigerant compressor 1271 using various cold energy. The refrigerant cooler 1272 is disposed downstream of the refrigerant compressor 1271, and when the refrigerant compressor 1271 is disposed in multiple stages, the refrigerant cooler 1272 may also be disposed in each stage of the refrigerant compressor 1271.

制冷剂膨胀器1273可以使被压缩的制冷剂膨胀。与在上述减压阀123中类似，被压缩之后通过膨胀而减压的制冷剂可以使制冷剂的温度充分降低，并且膨胀的制冷剂被输送到过冷装置126，以在对液化气体进行过冷时使用。The refrigerant expander 1273 may expand the compressed refrigerant. Similar to in the above-mentioned decompression valve 123, the refrigerant decompressed by expansion after being compressed can sufficiently reduce the temperature of the refrigerant, and the expanded refrigerant is sent to the subcooling device 126 to be used in the cooling of the liquefied gas. Use when cold.

制冷剂换热器1274利用从储存罐110向发电引擎130供应的蒸发气体来冷却由制冷剂压缩机1271压缩的制冷剂。此时，制冷剂换热器1274可以设置在如图所示的制冷剂压缩机1271和过冷装置126之间，但是与此不同，制冷剂换热器1274也可以设置在制冷剂压缩机1271和过冷装置126之间的任何位置，并且可以代替制冷剂冷却器1272。The refrigerant heat exchanger 1274 cools the refrigerant compressed by the refrigerant compressor 1271 using boil-off gas supplied from the storage tank 110 to the power generation engine 130 . At this time, the refrigerant heat exchanger 1274 may be disposed between the refrigerant compressor 1271 and the subcooling device 126 as shown in the figure, but different from this, the refrigerant heat exchanger 1274 may also be disposed in the refrigerant compressor 1271 and subcooling device 126, and can replace refrigerant cooler 1272.

制冷剂间换热器1275可以使被压缩的制冷剂和在过冷装置126中被加热的制冷剂进行热交换。具体而言，制冷剂间换热器1275可以使压缩后且膨胀前的制冷剂与在过冷装置126中被加热且压缩前的制冷剂进行热交换。The inter-refrigerant heat exchanger 1275 may exchange heat between the compressed refrigerant and the refrigerant heated in the subcooling device 126 . Specifically, the inter-refrigerant heat exchanger 1275 can exchange heat between the refrigerant after compression and before expansion and the refrigerant before being heated and compressed in the subcooling device 126 .

本实施例中，制冷剂供给部127以N2 Bryton cycle(布雷顿循环)设置，从而可以包括制冷剂间换热器1275，但是也可以省略制冷剂间换热器1275。In the present embodiment, the refrigerant supply unit 127 is provided in an N2 Bryton cycle, so that the inter-refrigerant heat exchanger 1275 may be included, but the inter-refrigerant heat exchanger 1275 may be omitted.

如上所述，本实施例为了在加注之前降低储存罐110的内压而利用液化气体的过冷回流，并且用于过冷的制冷剂利用向发电引擎130供应的蒸发气体的冷热，由此可以提高能源使用效率。As described above, the present embodiment utilizes the subcooled return flow of the liquefied gas in order to reduce the internal pressure of the storage tank 110 before filling, and the refrigerant for subcooling utilizes the cold and heat of the boil-off gas supplied to the power generation engine 130, and is This can improve energy efficiency.

图9是根据本发明的第六实施例的气体处理系统的工艺流程图。9 is a process flow diagram of a gas processing system according to a sixth embodiment of the present invention.

参照图9，在根据本发明的第六实施例的气体处理系统中，与上述第五实施例相比，制冷剂供给部127可以利用从储存罐110向发电引擎130供应的液化气体来冷却制冷剂。Referring to FIG. 9 , in the gas processing system according to the sixth embodiment of the present invention, compared with the above-described fifth embodiment, the refrigerant supply part 127 can use the liquefied gas supplied from the storage tank 110 to the power generation engine 130 to cool and refrigerate agent.

储存罐110的液化气体经由气化器113供给到发电引擎130，在本实施例中，应被汽化的液化气体用于冷却制冷剂，从而可以提高液化气体在加注之前的过冷效果，同时可以降低气化器113的负载或省略气化器113。The liquefied gas in the storage tank 110 is supplied to the power generation engine 130 via the vaporizer 113. In this embodiment, the liquefied gas that should be vaporized is used to cool the refrigerant, so that the supercooling effect of the liquefied gas before filling can be improved, and at the same time The load on the gasifier 113 may be reduced or omitted.

本实施例的制冷剂换热器1274与经由制冷剂循环线L7和蒸发气体消耗线L4的上述实施例不同，设置成经由制冷剂循环线L7和液化气体消耗线L5。另外，在上述实施例中，用于对液化气体进行过冷的泵可以是移送泵111或额外的泵，而在本实施例中，可以将燃料供给泵112用作用于使液化气体过冷的泵。The refrigerant heat exchanger 1274 of the present embodiment is provided so as to pass through the refrigerant circulation line L7 and the liquefied gas consumption line L5, unlike the above-described embodiments that pass through the refrigerant circulation line L7 and the boil-off gas consumption line L4. In addition, in the above-described embodiment, the pump for supercooling the liquefied gas may be the transfer pump 111 or an additional pump, while in this embodiment, the fuel supply pump 112 may be used as the pump for supercooling the liquefied gas Pump.

另外，本发明可以组合本实施例和上述实施例而包括利用向发电引擎130供应的蒸发气体和液化气体中的任一个来冷却制冷剂的实施例，在这种情况下，可以单独设置具备制冷剂/液化气体/蒸发气体的流的制冷剂换热器1274，或者可以设置制冷剂/液化气体的流的制冷剂换热器1274和制冷剂/蒸发气体的流的制冷剂换热器1274。In addition, the present invention may combine the present embodiment and the above-described embodiment to include an embodiment in which the refrigerant is cooled by either of the boil-off gas and the liquefied gas supplied to the power generation engine 130, and in this case, it is possible to separately provide a cooling system. The refrigerant heat exchanger 1274 for the flow of refrigerant/liquefied gas/boil off gas, or the refrigerant heat exchanger 1274 for the flow of refrigerant/liquefied gas and the refrigerant heat exchanger 1274 for the flow of refrigerant/boil off gas may be provided.

图10是根据本发明的第七实施例的气体处理系统的工艺流程图。10 is a process flow diagram of a gas processing system according to a seventh embodiment of the present invention.

参照图10，根据本发明的第七实施例的气体处理系统可以设置制冷剂换热器1274来代替制冷剂间换热器1275。10 , the gas processing system according to the seventh embodiment of the present invention may be provided with a refrigerant heat exchanger 1274 instead of the inter-refrigerant heat exchanger 1275 .

即，制冷剂换热器1274可以设置成由使被压缩的制冷剂、在过冷装置126中被加热的制冷剂以及向发电引擎130供应的液化气体或蒸发气体进行热交换的至少三个流构成，由此，制冷剂换热器1274包括了制冷剂间热交换的结构。That is, the refrigerant heat exchanger 1274 may be configured to exchange heat with at least three streams of the compressed refrigerant, the refrigerant heated in the subcooling device 126 , and the liquefied gas or boil-off gas supplied to the power generation engine 130 . Thus, the refrigerant heat exchanger 1274 includes a structure for exchanging heat between refrigerants.

因此，在本实施例中，由于不额外设置制冷剂间换热器1275，因此可以减小制冷剂供给部127的构成以实现紧凑。Therefore, in the present embodiment, since the inter-refrigerant heat exchanger 1275 is not additionally provided, the configuration of the refrigerant supply portion 127 can be reduced and compact.

作为参考，以下参考图11至图13说明的第八至第十一实施例中，考虑到加注船舶For reference, in the eighth to eleventh embodiments described below with reference to Figs. BV为了在加注期间使移送泵111工作，需要充分地运行发电引擎130，因此与燃气推进船舶In order to operate the transfer pump 111 during bunkering, the BV needs to fully operate the power generation engine 130, so it is different from the gas propulsion vessel. GFS不同，在停泊状态下燃料的消耗量高，并且有效地优化了整个系统。Unlike GFS, fuel consumption is high in parked conditions and the entire system is effectively optimized.

在下文中，将详细说明每个实施例。Hereinafter, each embodiment will be described in detail.

图11是根据本发明的第八实施例的气体处理系统的工艺流程图。11 is a process flow diagram of a gas processing system according to an eighth embodiment of the present invention.

参照图11，根据本发明的第八实施例的气体处理系统，类似于上述实施例所公开的内容，包括加注管理部120，该加注管理部120利用冷却装置122、126来调节储存罐110的内压，该冷却装置122、126利用制冷剂来冷却储存罐110的液化气体或蒸发气体后使其回流。11, a gas treatment system according to an eighth embodiment of the present invention, similar to that disclosed in the above-described embodiments, includes a refill management section 120 that utilizes cooling devices 122, 126 to condition storage tanks The cooling devices 122 and 126 cool the liquefied gas or boil-off gas in the storage tank 110 with a refrigerant and return it to the internal pressure of the storage tank 110 .

在本实施例中，假设启动了使液化气体过冷后回流以使储存罐110接收更多的蒸发气体的冷却装置122、126，或者假设启动了使从燃料罐210a、210b回流的蒸发气体液化回流的冷却装置122、126，因此，可以直接或间接地导出储存罐110能够从燃气推进船舶GFS接收的蒸发气体最大回流量，可以将这种蒸发气体最大回流量设定为小于在加注期间通过蒸发气体回流线L2输送的蒸发气体流量。In the present embodiment, it is assumed that the cooling devices 122, 126 for subcooling and recirculating the liquefied gas so that the storage tank 110 receives more boil-off gas is activated, or it is assumed that the liquefaction of the boil-off gas returning from the fuel tanks 210a, 210b is activated. The cooling devices 122, 126 of the return flow, therefore, may directly or indirectly derive the maximum return flow of boil-off gas that the storage tank 110 can receive from the gas-propelled vessel GFS, which maximum return flow of boil-off gas may be set to be less than during bunkering The boil-off gas flow delivered through boil-off gas return line L2.

即，在本实施例中，仅启动冷却装置122、126的话，不能消化从燃气推进船舶GFS回流到加注船舶BV的所有蒸发气体。但是，如上所述，考虑到加注船舶BV在停泊时需要比燃气推进船舶GFS更大的电力，在本实施例中，可以使蒸发气体压缩机121的蒸发气体处理量(即，对储存罐110的蒸发气体进行压缩后供给到发电引擎130的量)与考虑了冷却装置122、126的储存罐110的蒸发气体最大回流量之和为加注期间回流的蒸发气体流量以上。That is, in the present embodiment, if only the cooling devices 122 and 126 are activated, all the boil-off gas flowing back from the gas-propelled ship GFS to the bunkering ship BV cannot be digested. However, as mentioned above, considering that the bunkering vessel BV requires more power than the gas-propelled vessel GFS when berthed, in this embodiment, the boil-off gas processing capacity of the boil-off gas compressor 121 (ie, the capacity of the boil-off gas compressor 121 (that is, to the storage tank) can be The sum of the boil-off gas of 110 after being compressed and supplied to the generator engine 130 ) and the maximum return flow of boil-off gas in the storage tank 110 taking into account the cooling devices 122 and 126 is equal to or greater than the boil-off gas flow rate during refilling.

将这些整理如下。Arrange these as follows.

考虑了冷却装置122、126的最大回流量＜加注期间的回流量＜考虑了冷却装置122、126的最大回流量+压缩机的处理量Taking into account the maximum return flow of the cooling devices 122, 126 <the return flow during the filling period < taking into account the maximum return flow of the cooling devices 122, 126 + the processing capacity of the compressor

即，本实施例考虑到加注期间由蒸发气体压缩机121将足够的蒸发气体供给到发电引擎130，从而可以通过减小冷却装置122、126的规格来减少CAPEX。但是，蒸发气体压缩机121由于并联地设置了复数个，因此可以并联运行，在上式中，压缩机的处理量可以是当所有并联的蒸发气体压缩机121都启动时的处理量。That is, the present embodiment takes into account that sufficient boil-off gas is supplied to the power generation engine 130 by the boil-off gas compressor 121 during refilling, so that CAPEX can be reduced by reducing the size of the cooling devices 122, 126. However, since a plurality of boil-off gas compressors 121 are provided in parallel, they can be operated in parallel. In the above formula, the throughput of the compressors may be the throughput when all the boil-off gas compressors 121 connected in parallel are activated.

图12是根据本发明的第九实施例的气体处理系统的工艺流程图。12 is a process flow diagram of a gas processing system according to a ninth embodiment of the present invention.

参照图12，根据本发明的第九实施例的气体处理系统在与上述实施例不同的方向上优化了整个系统。Referring to FIG. 12, the gas processing system according to the ninth embodiment of the present invention optimizes the entire system in a direction different from that of the above-described embodiments.

具体而言，本实施例使得考虑了冷却装置122、126的储存罐110的蒸发气体最大回流量为加注期间的蒸发气体的回流流量以上。即，如下。Specifically, in the present embodiment, the maximum return flow rate of boil-off gas in the storage tank 110 considering the cooling devices 122 and 126 is made to be equal to or more than the return flow rate of boil-off gas during the filling period. That is, as follows.

加注期间的回流量＜考虑了冷却装置122、126的最大回流量Return flow during filling < maximum return flow taking into account cooling devices 122, 126

在这种情况下，在本实施例中，可以省略用于对储存罐110的蒸发气体进行压缩后供给到发电引擎130的蒸发气体压缩机121，而是通过对储存罐110的液化气体进行泵送、汽化后供给到发电引擎130。In this case, in the present embodiment, the boil-off gas compressor 121 for compressing the boil-off gas in the storage tank 110 and then supplying it to the power generation engine 130 can be omitted, and the liquefied gas in the storage tank 110 can be pumped by pumping It is supplied to the power generation engine 130 after being vaporized.

即，在本实施例中，能够使冷却装置122、126的规格覆盖加注期间回流的蒸发气体流量，并省略蒸发气体压缩机121，从而可以简化整体系统。That is, in the present embodiment, the specifications of the cooling devices 122, 126 can be made to cover the flow rate of boil-off gas returned during filling, and the boil-off gas compressor 121 can be omitted, so that the overall system can be simplified.

图13是根据本发明的第十实施例的气体处理系统的工艺流程图。13 is a process flow diagram of a gas processing system according to a tenth embodiment of the present invention.

参照图13，根据本发明的第十实施例的气体处理系统在与上述第八、第九实施例不同的方向上优化了系统。13, a gas processing system according to a tenth embodiment of the present invention optimizes the system in a different direction from the eighth and ninth embodiments described above.

具体而言，本实施例类似于第九实施例，使考虑了冷却装置122、126的储存罐110的蒸发气体最大回流量为加注期间蒸发气体的回流流量以上，并将储存罐110的蒸发气体供给到发电引擎130，整理如下。Specifically, this embodiment is similar to the ninth embodiment in that the maximum return flow rate of the boil-off gas in the storage tank 110 considering the cooling devices 122 and 126 is equal to or more than the return flow rate of boil-off gas during the filling period, and the boil-off gas in the storage tank 110 is reduced. The gas is supplied to the power generation engine 130 and is arranged as follows.

加注期间的回流量＜考虑了冷却装置122、126的最大回流量＜考虑了冷却装置122、126的最大回流量+压缩机的处理量Return volume during filling < maximum return volume considering cooling devices 122, 126 < maximum return volume considering cooling devices 122, 126 + throughput of compressor

但是，在本实施例中，可以单独设置将储存罐110的蒸发气体压缩后供给到发电引擎130的蒸发气体压缩机121。即，与蒸发气体压缩机121之间可以彼此备用的第八实施例不同，本实施例不可以实现蒸发气体压缩机121之间的备用。However, in this embodiment, the boil-off gas compressor 121 that compresses the boil-off gas in the storage tank 110 and supplies it to the power generation engine 130 may be provided separately. That is, unlike the eighth embodiment in which the boil-off gas compressors 121 can be backed up with each other, the present embodiment cannot implement the stand-by between the boil-off gas compressors 121 .

然而，由于本实施例已经构成为考虑了冷却装置122、126的蒸发气体的最大回流量超过加注期间蒸发气体的回流流量，因此不需要保障蒸发气体压缩机121之间的备用。However, since the present embodiment has been constructed to take into account that the maximum return flow of boil-off gas of the cooling devices 122, 126 exceeds the return flow of boil-off gas during filling, there is no need to ensure backup between boil-off gas compressors 121.

但是，为了实现作为供给到发电引擎130的燃料的备用，本实施例可以设置成蒸发气体和液化气体中的至少任一个供给到发电引擎130，使得蒸发气体的供给可以由液化气体的供给来备用。However, in order to achieve backup as the fuel supplied to the power generation engine 130, the present embodiment may be configured such that at least any one of boil-off gas and liquefied gas is supplied to the power generation engine 130, so that the supply of boil-off gas can be backed up by the supply of liquefied gas .

如上所述，在本实施例中，可以在能够充分地处理加注期间回流的蒸发气体的同时，单独构成蒸发气体压缩机121且可以将液化气体作为燃料供给的备用，从而可以减少设置和运营的成本。As described above, in the present embodiment, the boil-off gas compressor 121 can be independently constructed and the liquefied gas can be supplied as a backup for fuel supply while the boil-off gas flowing back during refilling can be sufficiently handled, so that installation and operation can be reduced the cost of.

除了上述实施例之外，本发明涵盖由至少两个上所述实施例的组合或者至少一个以上所述实施例和公知技术的组合的所有实施例。In addition to the above-described embodiments, the present invention covers all embodiments consisting of a combination of at least two of the above-described embodiments or a combination of at least one of the above-described embodiments and known techniques.

以上通过具体实施例对本发明进行了详细的说明，但这仅仅是为了具体地说明本发明而已，本发明并不限定于此，在不背离本发明的技术思想的范围内，本发明所属的技术领域的一般技术人员能够对其进行变形或者改进。The present invention has been described in detail above through specific embodiments, but this is only for the purpose of specifically explaining the present invention, and the present invention is not limited to this. Those skilled in the art can modify or improve it.

本发明的单纯的变形乃至变更均属于本发明的保护范围，通过所附的权利要求书将更加明确本发明的具体的保护范围。Simple deformations and even changes of the present invention belong to the protection scope of the present invention, and the specific protection scope of the present invention will be more clarified by the appended claims.

附图标记说明Description of reference numerals

BV：加注船舶 GFS：燃气推进船舶BV: Bunkered Vessels GFS: Gas Propelled Vessels

110：储存罐 111：移送泵110: Storage Tank 111: Transfer Pump

112：燃料供给泵 113：气化器112: Fuel supply pump 113: Carburettor

120：加注管理部 121：蒸发气体压缩机120: Filling Management Department 121: Boil-off Gas Compressor

121a：低压压缩机 121b：增压压缩机121a: Low pressure compressor 121b: Booster compressor

121c：高压压缩机 122：再液化装置、冷却装置121c: High pressure compressor 122: Reliquefaction unit, cooling unit

123：压力调节阀、减压阀 124：气液分离器123: Pressure regulating valve, pressure reducing valve 124: Gas-liquid separator

125：蒸发气体换热器 126：过冷装置、冷却装置125: Evaporative gas heat exchanger 126: Subcooling device, cooling device

127：制冷剂供给部 130：发电引擎127: Refrigerant supply unit 130: Power generation engine

140：气体燃烧装置 210a、210b：燃料罐140: Gas combustion device 210a, 210b: Fuel tank

220：燃料处理部 230：推进引擎220: Fuel Handling Division 230: Propulsion Engines

L1：加注线 L2：蒸发气体回流线L1: Filling line L2: Boil off gas return line

L3：压力调节线 L4：蒸发气体消耗线L3: Pressure regulation line L4: Evaporated gas consumption line

L5：液化气体消耗线 L6：气体供给线L5: Liquefied gas consumption line L6: Gas supply line

L7：制冷剂循环线L7: Refrigerant circulation line

Claims (22)

1. A gas treatment system for delivering liquefied gas from a storage tank of a filling vessel to a C-type fuel tank provided in a gas-propelled vessel, the gas treatment system comprising:
a filling line for supplying the liquefied gas in the storage tank to the fuel tank;
a charge management unit that adjusts the internal pressure of the storage tank by liquefying the boil-off gas in the storage tank with a refrigerant and then refluxing the liquefied boil-off gas; and
an evaporation gas return line that conveys evaporation gas generated in the fuel tank when filling is performed through the filling line to the filling vessel,
the fill manager reduces the internal pressure of the storage tank below a preset pressure prior to filling, maintaining the internal pressure of the storage tank at less than the internal pressure of the fuel tank during filling, thereby eliminating the need for additional compressor compression of the boil-off gas as it is delivered through the boil-off gas return line.
2. The gas processing system of claim 1,
the storage tank is a diaphragm type or C type tank,
the predetermined pressure is 0.04barG or 0.2 barG.
3. The gas processing system of claim 1,
the filling management part comprises a reliquefaction device for liquefying the evaporation gas,
the boil-off gas return line delivers boil-off gas to the reliquefaction device.
4. The gas processing system of claim 3,
the filling management unit returns the boil-off gas delivered through the boil-off gas return line to the storage tank after reliquefying the boil-off gas during filling to maintain the internal pressure of the storage tank at a level lower than the internal pressure of the fuel tank.
5. The gas processing system of claim 1,
when filling the fuel tank in which the internal pressure before filling is the first pressure and the internal pressure is reduced due to inflow of liquefied gas during filling, the filling management portion maintains the internal pressure of the storage tank before and during filling at an internal pressure at which filling of the fuel tank is completed or less.
6. The gas processing system of claim 5,
when filling the fuel tank in which the internal pressure before filling is the second pressure and the internal pressure is increased due to the generation of the evaporation gas during filling, the filling management portion maintains the internal pressure of the storage tank before and during filling at an internal pressure at or below the internal pressure at which filling of the fuel tank is started.
7. The gas processing system of claim 6,
said first pressure is a pressure above a value of 0.05 to 0.1barG greater than said preset pressure,
the second pressure is a pressure less than a value of 0.05 to 0.1barG greater than the preset pressure.
8. The gas processing system of claim 6,
the first pressure is between 0.5barG and 8barG,
the second pressure is less than 0.5 barG.
9. A gas treatment system for delivering liquefied gas from a storage tank of a filling vessel to a fuel tank provided in a gas propulsion vessel, the gas treatment system comprising:
a filling line for supplying the liquefied gas in the storage tank to the fuel tank;
a charge management unit that compresses, cools, and decompresses the vapor in the storage tank without exchanging heat with a refrigerant, and then returns the vapor to adjust the internal pressure of the storage tank; and
an evaporation gas return line that conveys evaporation gas generated in the fuel tank when filling is performed through the filling line to the filling vessel,
the fill manager reduces the internal pressure of the storage tank below a preset pressure prior to filling, blocks delivery of boil-off gas through the boil-off gas return line during filling to pressurize the fuel tank, or maintains the internal pressure of the storage tank at less than the internal pressure of the fuel tank, thereby eliminating the need for additional compressor compression of the boil-off gas as it is delivered through the boil-off gas return line.
10. The gas processing system of claim 9,
the storage tank is a diaphragm type or C type tank,
the predetermined pressure is 0.04barG or 0.2 barG.
11. The gas processing system of claim 9,
the filling management part comprises an evaporation gas heat exchanger for exchanging heat between the compressed evaporation gas and the evaporation gas discharged from the storage tank,
the boil-off gas return line delivers boil-off gas between the storage tank and the boil-off gas heat exchanger.
12. The gas processing system of claim 11,
the boil-off gas return line is arranged to convey boil-off gas between the storage tank and the boil-off gas heat exchanger via or bypassing the boil-off gas heat exchanger.
13. The gas processing system of claim 11,
the filling management part includes:
a plurality of low-pressure compressors provided in parallel to compress the boil-off gas in the storage tank and supply the compressed boil-off gas to a power generation engine;
a multistage booster compressor disposed at a position branched from between the low-pressure compressor and the power generation engine, and compressing excess boil-off gas to 150barG or more; and
a pressure reducing valve for reducing pressure and liquefying the vapor compressed by the booster compressor,
the boil-off gas heat exchanger cools the high-pressure boil-off gas between the booster compressor and the pressure reducing valve using the boil-off gas discharged from the storage tank.
14. The gas processing system of claim 13,
the filling management part operates the plurality of low pressure compressors in parallel to suck the evaporation gas of the storage tank to reduce the internal pressure of the storage tank below a preset pressure before filling.
15. The gas processing system of claim 11,
the filling management part includes:
a low-pressure compressor for compressing the boil-off gas in the storage tank and supplying the compressed boil-off gas to a power generation engine;
a multi-stage high pressure compressor arranged in parallel with the low pressure compressor to compress the boil-off gas from the storage tank to above 150 barG; and
a pressure reducing valve for reducing pressure and liquefying the vapor compressed by the high-pressure compressor,
the boil-off gas heat exchanger cools the high-pressure boil-off gas between the high-pressure compressor and the pressure reducing valve using the boil-off gas discharged from the storage tank,
the high-pressure compressor supplies the boil-off gas of the intermediate stage to the power generation engine.
16. The gas processing system of claim 15,
the filling management unit operates the low-pressure compressor and the high-pressure compressor independently according to a liquefied gas storage amount of the storage tank.
17. A gas treatment system for delivering liquefied gas from a storage tank of a filling vessel to a fuel tank provided in a gas propulsion vessel, the gas treatment system comprising:
a filling line for supplying the liquefied gas in the storage tank to the fuel tank;
a filling management unit that adjusts the internal pressure of the storage tank by subcooling the liquefied gas in the storage tank with a refrigerant and then refluxing the subcooled liquefied gas; and
an evaporation gas return line that conveys evaporation gas generated in the fuel tank when filling is performed through the filling line to the filling vessel,
the fill manager reduces the internal pressure of the storage tank below a preset pressure prior to filling, blocks delivery of boil-off gas through the boil-off gas return line during filling to pressurize the fuel tank, or maintains the internal pressure of the storage tank at less than the internal pressure of the fuel tank, thereby eliminating the need for additional compressor compression of the boil-off gas as it is delivered through the boil-off gas return line.
18. The gas processing system of claim 17,
the storage tank is a diaphragm type or C type tank,
the predetermined pressure is 0.04barG or 0.2 barG.
19. The gas processing system of claim 17,
the filling management part includes:
a supercooling device for supercooling the liquefied gas by using a refrigerant; and
a refrigerant supply unit for supplying a refrigerant to the supercooling unit,
the refrigerant supply unit includes a refrigerant heat exchanger that cools the refrigerant using the liquefied gas or the evaporated gas supplied from the storage tank to the power generation engine.
20. The gas processing system of claim 17,
the refrigerant supply unit includes:
a refrigerant compressor;
an inter-refrigerant heat exchanger for exchanging heat between the compressed refrigerant and the refrigerant heated by the subcooling device;
a refrigerant expander that expands the refrigerant compressed by the inter-refrigerant heat exchanger; and
the refrigerant heat exchanger cools the compressed refrigerant by the liquefied gas or the evaporated gas supplied to the power generation engine.
21. The gas processing system of claim 17,
the refrigerant supply unit includes:
a refrigerant compressor;
a refrigerant heat exchanger that exchanges heat between the compressed refrigerant, the refrigerant heated by the subcooling device, and the liquefied gas or the evaporated gas supplied to the power generation engine; and
and a refrigerant expander that expands the refrigerant compressed by the refrigerant heat exchanger.
22. A filling vessel, characterized in that,
having the gas treatment system of any one of claims 1 to 21.
CN201980022626.3A 2018-04-06 2019-04-08 Gas treatment system and ship comprising same Pending CN111918817A (en)

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