WO2016174706A1 - ガス回収システム、圧縮機システム及び冷凍サイクルシステム - Google Patents
ガス回収システム、圧縮機システム及び冷凍サイクルシステム Download PDFInfo
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- WO2016174706A1 WO2016174706A1 PCT/JP2015/062656 JP2015062656W WO2016174706A1 WO 2016174706 A1 WO2016174706 A1 WO 2016174706A1 JP 2015062656 W JP2015062656 W JP 2015062656W WO 2016174706 A1 WO2016174706 A1 WO 2016174706A1
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- gas
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- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/04—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases
- F25B43/043—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases for compression type systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
- F04D29/104—Shaft sealings especially adapted for elastic fluid pumps the sealing fluid being other than the working fluid or being the working fluid treated
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- 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
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- 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
- F25J1/0047—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 an "external" refrigerant stream in a closed vapor compression cycle
- F25J1/0052—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 an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
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- 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
- F25J1/0235—Heat exchange integration
- F25J1/0236—Heat exchange integration providing refrigeration for different processes treating not the same feed stream
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- 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
- F25J1/0244—Operation; Control and regulation; Instrumentation
- F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
- F25J1/0249—Controlling refrigerant inventory, i.e. composition or quantity
- F25J1/025—Details related to the refrigerant production or treatment, e.g. make-up supply from feed gas itself
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- 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
- F25J1/0268—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 using a dedicated refrigeration means
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- 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
- F25J1/0278—Unit being stationary, e.g. on floating barge or fixed platform
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- 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
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/0605—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the feed stream
- F25J3/062—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/0635—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 1 carbon atom or more
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/0645—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 3 carbon atoms or more
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/065—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 4 carbon atoms or more
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/066—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of nitrogen
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- 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
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/0685—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of noble gases
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- 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
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- 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
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/62—Liquefied natural gas [LNG]; Natural gas liquids [NGL]; Liquefied petroleum gas [LPG]
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- 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
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- 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
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- 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
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- F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
- F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open loop
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- 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
- F25J2280/00—Control of the process or apparatus
- F25J2280/02—Control in general, load changes, different modes ("runs"), measurements
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- 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
- F25J2290/72—Processing device is used off-shore, e.g. on a platform or floating on a ship or barge
Definitions
- the present invention relates to a gas recovery system, a compressor system including the same, and a refrigeration cycle system.
- the compressor is provided with a dry gas seal to prevent the gas compressed inside (process gas) from leaking outside through the gap between the rotating body (rotor) and stationary body (stator) at both ends of the casing. ing.
- the dry gas seal is supplied with a clean process gas that has passed through a filter and an inert gas for sealing so that a trace amount of process gas does not leak from the dry gas seal to the outer bearing.
- a gas hereinafter, referred to as a mixed gas in which a small amount of process gas leaking outside from the dry gas seal and the above-described inert gas are mixed is discharged from the compressor as a vent gas.
- Patent Document 1 discloses a method for regenerating recovered CFC that removes impurities such as oil and water contained in the recovered CFC.
- this regeneration method the recovered chlorofluorocarbon in a liquid state is heated in an evaporator, and the chlorofluorocarbon contained in the recovered chlorofluorocarbon is gasified to be separated from impurities such as liquid oil and moisture.
- the present invention provides a gas recovery system capable of reducing the amount of process gas additionally supplied to the compressor and suppressing the running cost of the compressor, and a compressor system and a refrigeration cycle system including the gas recovery system.
- the gas recovery system provides a mixed gas in which a process gas compressed by a compressor and an inert gas supplied to a seal portion of the compressor are mixed with the process gas.
- a gas recovery system that separates and collects the inert gas and cools the mixed gas at a temperature that is higher than the condensation temperature of the inert gas and lower than the condensation temperature of the process gas.
- a cooling unit that cools and liquefies the process gas contained in the gas; a separation unit that separates the mixed gas cooled by the cooling unit from the liquid process gas and the inert gas in a gaseous state;
- a process gas recovery line that is connected to the separation unit and circulates and vaporizes the process gas in a liquid state and supplies the process gas into the compressor.
- the mixed gas is cooled until the process gas is liquefied in the cooling unit, and the process gas is recovered by separating the liquid process gas and the inert gas in the gaseous state in the separation unit. Collected by line.
- the process gas and the inert gas in the mixed gas can be separated by deeply cooling the mixed gas by the cooling unit and the separation unit. Therefore, the recovered process gas can be returned to the compressor and reused. Therefore, the amount of process gas additionally supplied to the compressor can be reduced.
- the cooling unit may cool the mixed gas by exchanging heat between the liquefied natural gas and the mixed gas.
- the cooling unit heats the process gas in a liquid state flowing through the process gas recovery line and the mixed gas.
- the mixed gas may be cooled by replacement.
- a gas recovery system includes, in any one of the first to third aspects, a first compressor that compresses the mixed gas before being supplied to the cooling unit. May be.
- the condensing temperature of the process gas contained in the mixed gas can be increased by increasing the pressure of the mixed gas with the first compressor before being supplied to the cooling unit. Therefore, the cooling temperature for condensing the gaseous process gas in the cooling unit can be suppressed. Therefore, the efficiency at the time of liquefying process gas in a cooling part can be improved.
- a gas recovery system is the gas recovery system according to any one of the first to fourth aspects, comprising: a second compressor that compresses the process gas in a gas state flowing through the process gas recovery line. You may have.
- the pressure of the low-pressure mixed gas supplied from the compressor can be set to a pressure condition that optimizes the cryogenic separation, and the separated process gas can be returned to the high-pressure compressor.
- the gas recovery system is the gas recovery system according to any one of the first to fifth aspects, wherein the separation unit stores the separated process gas in the liquid state, and the process gas in the liquid state
- a supply adjustment unit that supplies the process gas in a liquid state to the process gas recovery line may be provided so that the liquid level is maintained at a certain position in the separation unit.
- a compressor system includes a compressor and the gas recovery system according to any one of the first to sixth aspects.
- the refrigeration cycle system according to the eighth aspect of the present invention includes the compressor system according to the seventh aspect.
- the process gas is separated from the mixed gas discharged from the seal portion of the compressor and returned to the compressor, thereby reducing the amount of process gas additionally supplied to the compressor and Running costs can be reduced.
- the refrigerating cycle system 1 which concerns on 1st embodiment of this invention is a system for cooling the cooling target which is not shown in figure.
- the refrigeration cycle system 1 of the present embodiment is used in, for example, a liquefied natural gas (hereinafter, LNG) plant.
- LNG liquefied natural gas
- the refrigeration cycle system 1 includes a compressor 3, a condenser 4, a storage unit 5, and an evaporator 6. These configurations are connected by piping in the order described above.
- the compressor 3 compresses a refrigerant in a gaseous state (hereinafter referred to as process gas G1).
- a drive machine 7 such as a motor for driving the rotor 11 (see FIG. 2) of the compressor 3 is connected.
- the condenser 4 cools and condenses the high-temperature and high-pressure process gas G1 compressed in the compressor 3.
- the storage unit 5 stores the process gas G ⁇ b> 1 made liquid in the condenser 4.
- the evaporator 6 performs heat exchange between the liquid process gas G10 supplied in a state where the pressure and temperature are reduced by adiabatic expansion from the reservoir 5 by the valve 8 and a cooling target (not shown), The process gas G10 in the liquid state is evaporated (vaporized). The vaporized process gas G1 is sent to the compressor 3 again.
- the process gas G1 may be, for example, Freon, but the process gas G1 of the present embodiment is a hydrocarbon (hydrocarbon).
- the hydrocarbon used as the process gas G1 may be, for example, one or more types of hydrocarbons appropriately selected from methane, ethane, propane, butane, and the like.
- the rotor 11 of the compressor 3 includes a rotating shaft 13 and an impeller (not shown) attached thereto.
- the stator 12 of the compressor 3 includes a casing (not shown) that houses the impeller of the rotor 11.
- the rotary shaft 13 has both first end 13 ⁇ / b> A and second end 13 ⁇ / b> B, which are both ends in the axial direction, protruding outside the casing.
- the rotating shaft 13 is rotatably supported with respect to the stator 12 by a bearing 14 outside the casing.
- a seal portion 10 is provided in a gap between the stator 12 and the rotor 11 at the first end portion 13A and the second end portion 13B of the rotating shaft 13.
- the seal portion 10 includes a leakage suppression seal portion 15 that suppresses the above-described process gas G1 from leaking from the inside to the outside of the casing.
- the leakage suppressing seal portion 15 is located inside the casing with respect to the bearing 14 in the axial direction of the rotary shaft 13.
- the leak suppression seal portion 15 has a plurality of dry gas seals 17.
- the leakage suppression seal portion 15 for example, another seal may not be provided between the plurality of dry gas seals 17, but in this embodiment, the labyrinth seal 16 is provided. Therefore, the leak suppressing seal portion 15 of this embodiment includes the labyrinth seal 16 and the dry gas seal 17.
- the first labyrinth seal 16 ⁇ / b> A, the first dry gas seal 17 ⁇ / b> A, the second labyrinth seal 16 ⁇ / b> B, and the second dry gas seal 17 ⁇ / b> B are sequentially arranged from the inside to the outside of the casing along the axial direction of the rotating shaft 13. It is arranged.
- a first space S1 is formed between the first labyrinth seal 16A and the first dry gas seal 17A.
- a part of the process gas G1 compressed in the compressor 3 is supplied to the first space S1 as the first seal gas through the filter.
- the pressure of the first space S1 increases, and leakage of the process gas G1 from the inside of the casing to the first space S1 is suppressed.
- a second space S2 is formed between the first dry gas seal 17A and the second labyrinth seal 16B.
- the process gas G1 leaked from the first dry gas seal 17A and the second seal gas G2 described later leaked from the second labyrinth seal 16B are mixed.
- a primary vent 18 Connected to the second space S2 is a primary vent 18 that discharges the mixed gas G3, which is a mixture of the gaseous process gas G1 and the second seal gas G2, to the gas recovery system 30.
- a third space S3 is formed between the second labyrinth seal 16B and the second dry gas seal 17B.
- a second seal gas (inert gas) G2 is supplied to the third space S3 from the external supply source 21 illustrated in FIG.
- the pressure in the third space S3 increases, and the process gas G1 leaked from the first space S1 into the second space S2 through the first dry gas seal 17A leaks into the third space S3 through the second labyrinth seal 16B. Prevent it from coming out.
- the second seal gas G2 supplied to the third space S3 leaks from the second labyrinth seal 16B and flows into the second space S2.
- the second seal gas G2 may be an inert gas having a lower condensation temperature than the process gas G1.
- the second seal gas G2 of this embodiment is nitrogen.
- the seal unit 10 further includes a separation seal 19 installed between the leak suppression seal unit 15 and the bearing 14.
- the separation seal 19 prevents the lubricating oil used in the bearing 14 from being mixed into the leakage suppressing seal portion 15 including the dry gas seal 17 by supplying the gas separation gas G4.
- the separation gas G4 used in the separation seal 19 is supplied only from the external supply source 21 illustrated in FIG. 1, similarly to the second seal gas G2.
- the separation gas G4 may be an inert gas, but the separation gas G4 of the present embodiment is nitrogen, similar to the second seal gas G2.
- a fourth space S4 is formed between the second dry gas seal 17B and the separation seal 19 in the gap between the stator 12 and the rotor 11.
- a minute amount of the second seal gas G ⁇ b> 2 leaking from the leak suppression seal portion 15 and the separation gas G ⁇ b> 4 from the separation seal 19 are mixed.
- the mixed gas is discharged from the fourth space S4 to the outside (for example, in the atmosphere) through the secondary vent 20.
- FIG. 2 shows only a state in which the seal portion 10 having the above-described configuration of the leakage suppression seal portion 15 and the separation seal 19 is provided on the first end portion 13A of the rotary shaft 13.
- the seal portion 10 having the configuration such as the suppression seal portion 15 and the separation seal 19 is also provided in the same manner with respect to the second end portion 13B of the rotating shaft 13.
- the refrigeration cycle system 1 of the present embodiment separates the mixed gas G3 discharged from the primary vent 18 of the compressor 3 into a process gas G1 and a second seal gas G2.
- a gas recovery system 30 for recovery is provided.
- the gas recovery system 30 constitutes the compressor system 2 together with the compressor 3.
- the gas recovery system 30 includes a mixed gas supply line 31, a cooling unit 32, a separation unit 33, a process gas recovery line 34, a refrigerant supply line 35, and a supply adjustment unit 36.
- the mixed gas supply line 31 connects the compressor 3 and the separation unit 33.
- the mixed gas supply line 31 supplies the mixed gas G3 in which the gaseous process gas G1 and the gaseous second seal gas G2 discharged from the compressor 3 are mixed to the separation unit 33 via the cooling unit 32. .
- the mixed gas supply line 31 of the present embodiment is connected to the primary vent 18 of the compressor 3, passes through the cooling unit 32, and is connected to the separation unit 33.
- a mixed gas G3 having a pressure higher by about 0.1 to 0.2 bar than the atmospheric pressure and having a temperature of about 30 ° C. to 40 ° C. flows from the primary vent 18.
- the mixed gas supply line 31 is provided with a first compressor 37 on the upstream side (compressor 3 side) of the cooling unit 32.
- the first compressor 37 compresses the mixed gas G3 before being supplied to the cooling unit 32.
- the first compressor 37 raises the condensation temperature until the condensation temperature of the process gas G1 in the mixed gas G3 reaches a temperature at which the cooling unit 32 can efficiently condense.
- the mixed gas G3 compressed by the first compressor 37 is supplied to the cooling unit 32 via the mixed gas supply line 31.
- the temperature of the mixed gas G3 when the pressure of the mixed gas G3 is greatly increased to about 8 to 10 bar, the temperature of the mixed gas G3 also increases greatly. It is preferable to have a structure for cooling before supplying to the battery. For example, a cooler may be provided between the first compressor 37 and the cooling unit 32 of the mixed gas supply line 31 to cool the mixed gas G3 that has been compressed and whose temperature has increased.
- the cooling unit 32 gasses the second seal gas G2 contained in the mixed gas G3 by cooling the mixed gas G3 at a temperature higher than the condensation temperature of the second seal gas G2 and lower than the condensation temperature of the process gas G1.
- the process gas G1 contained in the mixed gas G3 is cooled and liquefied while remaining in the state.
- the cooling unit 32 of this embodiment is provided in the middle of the mixed gas supply line 31. Specifically, the cooling unit 32 is disposed across three of the mixed gas supply line 31, the process gas recovery line 34, and the refrigerant supply line 35.
- the cooling unit 32 cools the mixed gas G3 compressed by the first compressor 37, and liquefies the process gas G1 without liquefying most of the second seal gas G2 in the mixed gas G3.
- the cooling unit 32 supplies the second mixed gas G30, which is a mixed gas G3 of the liquefied process gas G1 and the non-liquefied second seal gas G2, to the separation unit 33. That is, the second mixed gas G30 is in a gas-liquid mixed state in which the process gas G10 in the liquid state and the second seal gas G2 in the gas state are mixed.
- the mixing state of the second seal gas G2 in the gas state in the second mixed gas G30 varies depending on the condensation pressure in the cooling unit 32. Therefore, it is preferable to increase the pressure with the compressor before passing through the cooling section 32 according to the mixing state of the second seal gas G2 in the gaseous state in the allowable second mixed gas G30, and to separate at a low pressure. In some cases, it is preferable to separate them with a compressor after the operation. Specifically, when the pressure is increased before passing through the cooling unit 32, the condensation temperature rises and it is easy to condense, but nitrogen that is the second seal gas G2 is mixed into the separated second mixed gas G30. The ratio will increase.
- the cooling unit 32 of the present embodiment cools the mixed gas G3 by exchanging heat with LNG. At the same time, the cooling unit 32 cools the mixed gas G3 by exchanging heat between the mixed process gas G10 and the process gas G10 in a liquid state that flows through a process gas recovery line 34 described later.
- the mixed gas G3 Since the temperature of the gaseous process gas G1 is higher than that of the liquid process gas G10, the mixed gas G3 is cooled by the liquid process gas G10 flowing through the process gas recovery line 34 in the cooling unit 32. Furthermore, since the condensation temperature of the process gas G1 is higher than that of LNG which is ⁇ 150 ° C. to ⁇ 160 ° C., the process gas G1 in the mixed gas G3 is cooled by the LNG flowing through the refrigerant supply line 35 in the cooling unit 32. Liquefied. As a result, the cooling unit 32 supplies, for example, the mixed gas G3 having a temperature of about 30 ° C. to 40 ° C. to the separation unit 33 as the second mixed gas G30 cooled to about ⁇ 150 ° C.
- the process gas G1 contained in the mixed gas G3 is cooled and liquefied by exchanging heat between the LNG and the process gas G10 in a liquid state and the mixed gas G3.
- the LNG flowing through the refrigerant supply line 35 and the process gas G10 in the liquid state flowing through the process gas recovery line 34 are heated and vaporized.
- the separation unit 33 is supplied with the second mixed gas G30 from the cooling unit 32 via the mixed gas supply line 31.
- the separation unit 33 separates the process gas G10 in the liquid state and the second seal gas G2 in the gas state from the second mixed gas G30 cooled by the cooling unit 32.
- the separation part 33 of the present embodiment is formed in a cylindrical shape extending in the vertical direction and closing the upper part and the lower part.
- the mixed gas supply line 31 is connected to the intermediate portion in the vertical direction of the separation unit 33, but it may be connected to an appropriate height.
- the separation unit 33 of the present embodiment is a separator that has a member that has a function of allowing gas to pass while capturing fine mist-like particles, such as a demister, and stores liquid below. . That is, in the separation unit 33 of this embodiment, the second mixed gas G30 is supplied, whereby the process gas G10 in the liquid state is separated downward, and the second seal gas G2 in the gaseous state is separated upward.
- the second seal gas G2 separated above the separation part 33 and the slightly mixed gas process gas G1 are discharged to the outside through a gas discharge line 38 connected above the separation part 33.
- the gas discharge line 38 is provided with an on-off valve 381 so that the flow rate of the second seal gas G2 to be discharged can be adjusted.
- the process gas recovery line 34 is connected to the lower part of the separation unit 33, and the liquid process gas G 10 stored in the lower part of the separation unit 33 is circulated and vaporized, and then supplied into the compressor 3.
- the process gas recovery line 34 of the present embodiment passes through the cooling unit 32 and passes between the evaporator 6 and the compressor 3 so that the process gas G1 recovered from the separation unit 33 is compressed again in the compressor 3.
- Connected to the pipe The process gas recovery line 34 passes through the cooling unit 32 and exchanges heat with the mixed gas G3, thereby heating and vaporizing the liquid process gas G10 flowing through the inside.
- the process gas G10 in a liquid state of about ⁇ 150 ° C. flowing from the separation unit 33 passes through the cooling unit 32, so that the process gas G1 in a gas state of about 20 ° C. to 30 ° C. It becomes.
- the supply adjusting unit 36 adjusts the amount of the process gas G1 in the gaseous state to be returned into the compressor 3.
- the supply adjusting unit 36 supplies the process gas G10 in the liquid state to the process gas recovery line 34 so that the liquid level of the process gas G10 in the liquid state is kept at a certain position in the separation unit 33.
- the supply adjustment unit 36 of the present embodiment directly adjusts the supply amount of the process gas G10 in the liquid state supplied from the separation unit 33 to the process gas recovery line 34, and returns the process gas G1 in the gas state to be returned to the compressor 3 Adjust the amount.
- the supply adjustment unit 36 of this embodiment adjusts the opening degree by receiving a detection unit 361 provided in the separation unit 33, a control unit 362 to which a detection result is input from the detection unit 361, and a signal from the control unit 362. Possible control valve 363.
- the detection unit 361 detects the position of the liquid level of the stored process gas G10 in a liquid state, and sends a signal to the control unit 362.
- the control unit 362 sends an opening degree instruction to the control valve 363 so that the position of the liquid level of the process gas G10 in the liquid state in the separation unit 33 is kept constant.
- the control valve 363 is provided upstream of the cooling unit 32 of the process gas recovery line 34 (on the separation unit 33 side).
- the refrigerant supply line 35 supplies LNG to the cooling unit 32 as a refrigerant for cooling the mixed gas G3 by the cooling unit 32.
- the refrigerant supply line 35 of the present embodiment uses LNG purified by the LNG plant.
- the LNG is heated and vaporized by exchanging heat with the mixed gas G3 in the cooling unit 32, and becomes boil-off gas (BOG), which is returned to the LNG plant again to the fuel gas and the like in the plant. Used.
- the refrigerant supply line 35 is provided with an on-off valve 351 so that the flow rate of LNG supplied to the cooling unit 32 can be adjusted.
- the gaseous mixed gas G3 discharged from the primary vent 18 of the compressor 3 is at a pressure higher by about 0.1 to 0.2 bar than the atmospheric pressure and has a temperature of 30. It flows into the mixed gas supply line 31 at about 40 ° C. to 40 ° C.
- the gaseous mixed gas G ⁇ b> 3 flows through the mixed gas supply line 31 and is boosted and heated by the first compressor 37. At this time, the mixed gas G3 is increased in pressure, and the condensation temperature also rises.
- the mixed gas G ⁇ b> 3 whose pressure is increased and raised in the first compressor 37 is supplied to the cooling unit 32.
- the cooling unit 32 is supplied with a process gas G10 in a liquid state via a process gas recovery line 34 and is supplied with LNG via a refrigerant supply line 35. Therefore, by passing through the cooling unit 32, the mixed gas G3 is cooled to about ⁇ 150 ° C. by the LNG in the liquid process gas G10 and the refrigerant supply line 35 flowing through the process gas recovery line 34. Specifically, the mixed gas G3 is cooled at a temperature higher than the condensation temperature of the second seal gas G2 and lower than the condensation temperature of the process gas G1, so that only the process gas G1 is liquefied. Therefore, the second mixed gas G30, which is a gas in a gas-liquid mixed state, is supplied to the separation unit 33 via the mixed gas supply line 31.
- the liquid process gas G10 is separated downward, and the gaseous second seal gas G2 is separated upward.
- the second seal gas G2 separated upward is discharged to the outside through the gas discharge line 38.
- the process gas G10 in the liquid state stored below is supplied again to the cooling unit 32 via the process gas recovery line 34.
- the liquid process gas G10 that has flowed into the process gas recovery line 34 passes through the cooling unit 32 and is heated by exchanging heat with the mixed gas G3 flowing through the mixed gas supply line 31.
- the process gas G10 in a liquid state is heated from 20 ° C. to about 30 ° C. and vaporized by exchanging heat with the mixed gas G3. Therefore, the gaseous process gas G ⁇ b> 1 is supplied to the compressor 3 via the process gas recovery line 34.
- the compressor system 2 including the same, and the refrigeration cycle system 1, the process gas G ⁇ b> 1 in the gaseous state contained in the mixed gas G ⁇ b> 3 discharged from the compressor 3 is sent by the cooling unit 32. It cools until it liquefies and is isolate
- the liquid process gas G ⁇ b> 10 separated by the process gas recovery line 34 is vaporized and returned to the compressor 3.
- the process gas G1 used as the first seal gas in the leakage suppression seal portion 15 can be returned to the compressor 3 and reused. Therefore, the amount of process gas G1 additionally supplied to the compressor 3 can be reduced. Thereby, the running cost of the compressor 3, the compressor system 2 provided with the same, and the refrigerating cycle system 1 can be suppressed.
- the cooling unit 32 By using LNG to cool and condense the mixed gas G3 in the cooling unit 32, it is possible to perform cryogenic separation at a cryogenic temperature and a low pressure. It is not necessary to increase the condensation temperature by increasing the pressure of the mixed gas G3 mixed with the inert gas, and the cryogenic separation can be performed at a low pressure. Therefore, the gaseous process gas G1 can be efficiently converted into a liquid state without liquefying most of the second seal gas G2 in the mixed gas G3. Therefore, the recovery efficiency of the process gas G1 in the mixed gas G3 can be improved.
- the mixed gas G3 in which the process gas G1 in the gaseous state and the second seal gas G2 are mixed has a lower partial pressure, and therefore the condensation temperature becomes lower than that in the case of the process gas G1 alone.
- the second seal gas G2 is nitrogen
- the ratio contained in the mixed gas G3 increases, and the condensation temperature may become very low. Therefore, by using cryogenic LNG, the mixed gas G3 can be subjected to deep cold separation without increasing the pressure.
- the gas recovery system 30 of the compressor 3 when used in the LNG plant as in this embodiment, it is possible to easily supply the cryogenic LNG to the cooling unit 32. Therefore, it is not necessary to newly prepare a cooling heat source for cooling the mixed gas G3 or to prepare a large-scale device for the cooling unit 32, and the gas recovery system of the compressor 3 with a simple configuration. 30 can be configured.
- cooling unit 32 Since the cooling unit 32 is provided across the mixed gas supply line 31 and the process gas recovery line 34, heat exchange is performed between the mixed gas G3 and the liquid process gas G10, and the mixed gas G3.
- the process gas G10 in the liquid state can be heated while cooling. Therefore, the cooling energy at the time of cooling the mixed gas G3 can be recovered and effectively used as energy for heating the process gas G10 in the liquid state.
- the cooling unit 32 By providing the cooling unit 32 across the mixed gas supply line 31, the process gas recovery line 34, and the refrigerant supply line 35, heat exchange is performed between the mixed gas G3 and not only the LNG but also the liquid process gas G10. Can be performed. Therefore, the cooling efficiency of the mixed gas G3 in the cooling unit 32 can be further improved as compared with the case of LNG alone. As a result, the supply amount of LNG supplied by the cooling unit 32 can be suppressed.
- the pressure of the mixed gas G3 is increased by the first compressor 37 before being supplied to the cooling unit 32, whereby the condensation temperature of the process gas G1 contained in the mixed gas G3 can be increased. Therefore, the temperature cooled by the cooling unit 32 in order to condense the gaseous process gas G1 can be suppressed. Therefore, the cooling efficiency when the process gas G1 is liquefied by the cooling unit 32 can be improved.
- the liquid level position of the liquid process gas G10 in the separation unit 33 is kept constant, the liquid process gas G10 can be reliably supplied from the separation unit 33 to the process gas recovery line 34. Therefore, it is possible to prevent the second seal gas G2 in the gas state in the separation part 33 from being mixed into the process gas recovery line 34.
- Second Embodiment the gas recovery system of the second embodiment will be described with reference to FIG.
- the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the gas recovery system of the second embodiment is different from the first embodiment in that a compressor is provided in the process gas recovery line instead of the mixed gas supply line.
- the gas recovery system 30A of the second embodiment includes a mixed gas supply line 31A that is not provided with the first compressor 37, a cooling unit 32, a separation unit 33, and a process gas recovery that is provided with the second compressor 39.
- a line 34, a supply adjusting unit 36 that adjusts the supply amount of the process gas G1 to the second compressor 39, and a refrigerant supply line 35 are provided.
- the mixed gas supply line 31A of the second embodiment connects the primary vent 18 of the compressor 3 and the separation unit 33 via the cooling unit 32.
- the first compressor 37 is not provided in the middle, and the mixed gas G3 discharged from the primary vent 18 passes through the cooling unit 32 without being pressurized and separated. Connected to the unit 33.
- the process gas recovery line 34A of the second embodiment is connected to the lower part of the separation unit 33 and causes the liquid process gas G10 stored in the lower part of the separation unit 33 to flow and be vaporized. Then, it is supplied into the compressor 3.
- the process gas recovery line 34 ⁇ / b> A is provided with a second compressor 39 that compresses the process gas G ⁇ b> 1 in a gaseous state downstream from the cooling unit 32 (on the compressor 3 side).
- the second compressor 39 compresses the process gas G1 in a gaseous state before being cooled by the cooling unit 32 and supplied to the compressor 3.
- the second compressor 39 increases the pressure of the process gas G1 until the pressure of the process gas G1 becomes approximately the same as the pressure in the compressor 3.
- the gaseous process gas G1 compressed by the second compressor 39 is supplied to the compressor 3 via the process gas recovery line 34A.
- the low pressure process gas G1 is pressurized by the second compressor 39 after the deep cold separation. By doing so, it can be returned to the compressor 43 system. Therefore, the low pressure mixed gas supplied from the compressor 3 can be set to a pressure condition that makes the cryogenic separation optimal, and the separated process gas can be returned to the high pressure compressor.
- the cooling unit 32 is not limited to being disposed across three of the mixed gas supply lines 31 and 31A, the process gas recovery lines 34 and 34A, and the refrigerant supply line 35. It is sufficient if the mixed gas G3 flowing through the supply lines 31 and 31A can be cooled. Moreover, the cooling unit 32 may be disposed across only two of the mixed gas supply lines 31 and 31A and the refrigerant supply line 35, and the mixed gas G3 may be cooled only by LNG. In this case, in order to vaporize the process gas G10 in the liquid state, another heater (heat source) may be prepared in the process gas recovery lines 34 and 34A.
- the cooling unit 32 is not limited to a structure that exchanges heat with LNG, and it is sufficient that the mixed gas G3 can be cooled at a temperature lower than the condensation temperature of the process gas G1.
- the cooling unit 32 may exchange heat by circulating liquefied carbon or liquefied nitrogen in the refrigerant supply line 35 instead of LNG, and the mixed gas G3 using a device such as a refrigerator without using the refrigerant supply line 35.
- the structure which cools may be sufficient.
- the gas recovery systems 30, 30A are not limited to the configuration having only the first compressor 37 as in the first embodiment or the configuration having only the second compressor 39 as in the second embodiment, Both the first compressor 37 and the second compressor 39 may be included.
- the amount of the process gas G1 that is additionally supplied to the compressor 3 is reduced by separating the process gas G1 from the mixed gas G3 and returning it to the compressor 3.
- the running cost of the compressor 3 can be suppressed.
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Abstract
Description
図1に示すように、本発明の第一実施形態に係る冷凍サイクルシステム1は、図示しない冷却対象を冷却するためのシステムである。本実施形態の冷凍サイクルシステム1は、例えば、液化天然ガス(以下、LNG)プラントに用いられる。特に、プロセスガスG1の補充が困難であり、冷却源として冷凍機を追加するスペースの確保も困難な洋上プラントや船上プラントのような海底から天然ガスを掘り出して液化するLNGプラントに適用されることが好ましい。冷凍サイクルシステム1は、圧縮機3と、凝縮器4と、貯留部5と、蒸発器6と、を備える。これらの構成は、上記した順番で配管によって接続されている。
凝縮器4は、圧縮機3において圧縮された高温高圧のプロセスガスG1を冷却して凝縮する。
蒸発器6は、貯留部5からバルブ8により断熱膨張して圧力及び温度が低下した状態で供給される液体状態のプロセスガスG10と、不図示の冷却対象との間で熱交換することで、液体状態のプロセスガスG10を蒸発させる(気化させる)。気化したプロセスガスG1は、再び圧縮機3に送り込まれる。
次に、図4を参照して第二実施形態のガス回収システムについて説明する。
第二実施形態においては第一実施形態と同様の構成要素には同一の符号を付して詳細な説明を省略する。この第二実施形態のガス回収システムは、混合ガス供給ラインではなく、プロセスガス回収ラインに圧縮機が設けられている点について第一実施形態と相違する。
2 圧縮機システム
3 圧縮機
4 凝縮器
5 貯留部
6 蒸発器
7 駆動機
8 バルブ
10 シール部
11 ロータ
12 ステータ
13 回転軸
14 軸受
15 漏れ抑制用シール部
16 ラビリンスシール
16A 第一ラビリンスシール
16B 第二ラビリンスシール
17 ドライガスシール
17A 第一ドライガスシール
17B 第二ドライガスシール
18 一次ベント
19 セパレーションシール
20 二次ベント
21 外部供給源
S1 第一空間
S2 第二空間
S3 第三空間
S4 第四空間
G1 気体状態のプロセスガス
G2 第二シールガス(不活性ガス)
G3 混合ガス
G30 第二混合ガス
G4 セパレーションガス
G10 液体状態のプロセスガス
30、30A ガス回収システム
31、31A 混合ガス供給ライン
32 冷却部
33 分離部
34、34A プロセスガス回収ライン
35 冷媒供給ライン
36 供給調整部
361 検出部
362 制御部
363 制御弁
37 第一圧縮機
38 ガス排出ライン
39 第二圧縮機
Claims (8)
- 圧縮機で圧縮されるプロセスガスと、前記圧縮機のシール部に供給される不活性ガスとが混合された混合ガスを、前記プロセスガスと前記不活性ガスとに分離して回収するガス回収システムであって、
前記混合ガスを前記不活性ガスの凝縮温度よりも高く前記プロセスガスの凝縮温度よりも低い温度で冷却することで、前記混合ガスに含まれる前記プロセスガスを冷却して液化する冷却部と、
前記冷却部で冷却した前記混合ガスを液体状態の前記プロセスガスと、気体状態の前記不活性ガスとを分離する分離部と、
前記分離部に接続され、液体状態の前記プロセスガスを流通させて気化させた上で前記圧縮機内に供給するプロセスガス回収ラインと、
を備えるガス回収システム。 - 前記冷却部は、液化天然ガスと前記混合ガスとを熱交換することで前記混合ガスを冷却する請求項1に記載のガス回収システム。
- 前記冷却部は、前記プロセスガス回収ラインを流通する液体状態の前記プロセスガスと、前記混合ガスとを熱交換することで前記混合ガスを冷却する請求項1または請求項2に記載のガス回収システム。
- 前記冷却部に供給される前の前記混合ガスを圧縮する第一圧縮機を備える請求項1から請求項3のいずれかひとつに記載のガス回収システム。
- 前記プロセスガス回収ラインを流通する気体状態の前記プロセスガスを圧縮する第二圧縮機を備える請求項1から請求項4のいずれかひとつに記載のガス回収システム。
- 前記分離部は、分離した液体状態の前記プロセスガスを貯留し、
液体状態の前記プロセスガスが前記分離部で液面を一定の位置に保つように、前記プロセスガス回収ラインに液体状態の前記プロセスガスを供給する供給調整部を備える請求項1から請求項5のいずれかひとつに記載のガス回収システム。 - 圧縮機と、
請求項1から請求項6のいずれか一項に記載のガス回収システムと、
を備える圧縮機システム。 - 請求項7に記載の圧縮機システムを備える冷凍サイクルシステム。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/062656 WO2016174706A1 (ja) | 2015-04-27 | 2015-04-27 | ガス回収システム、圧縮機システム及び冷凍サイクルシステム |
| US15/562,230 US10337779B2 (en) | 2015-04-27 | 2015-04-27 | Gas recovery system, compressor system, and refrigeration cycle system |
| EP15890690.9A EP3264011A4 (en) | 2015-04-27 | 2015-04-27 | Gas recovery system, compressor system, and refrigeration cycle system |
| JP2017515298A JP6362292B2 (ja) | 2015-04-27 | 2015-04-27 | ガス回収システム、圧縮機システム及び冷凍サイクルシステム |
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| PCT/JP2015/062656 WO2016174706A1 (ja) | 2015-04-27 | 2015-04-27 | ガス回収システム、圧縮機システム及び冷凍サイクルシステム |
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| WO2016174706A1 true WO2016174706A1 (ja) | 2016-11-03 |
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| PCT/JP2015/062656 Ceased WO2016174706A1 (ja) | 2015-04-27 | 2015-04-27 | ガス回収システム、圧縮機システム及び冷凍サイクルシステム |
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| Country | Link |
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| US (1) | US10337779B2 (ja) |
| EP (1) | EP3264011A4 (ja) |
| JP (1) | JP6362292B2 (ja) |
| WO (1) | WO2016174706A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019040521A1 (en) * | 2017-08-21 | 2019-02-28 | GE Oil & Gas, LLC | RECOVERY OF REFRIGERANT FLUID AND NITROGEN |
| JP2019044833A (ja) * | 2017-08-31 | 2019-03-22 | 三菱重工業株式会社 | 軸封装置およびタービン発電システム |
| US11209009B2 (en) * | 2017-02-02 | 2021-12-28 | Mitsubishi Heavy Industries Compressor Corporation | Rotating machine |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10989215B2 (en) | 2017-09-05 | 2021-04-27 | Solar Turbines Incorporated | Compressor system equipped for fugitive gas handling and fugitive gas system operating method |
| CN108387066A (zh) * | 2018-02-13 | 2018-08-10 | 南京优助智能科技有限公司 | 一种工业深冷的能源中心控制系统 |
| CN115210475B (zh) * | 2020-02-26 | 2025-09-30 | 西门子能源国际公司 | 在系紧螺栓中具有排流/密封布置的用于涡轮机械的转子结构 |
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| FR3140938B1 (fr) * | 2022-10-17 | 2024-11-01 | Air Liquide | Procédé et appareil de récupération de gaz pour compresseur |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3016404U (ja) * | 1995-03-31 | 1995-10-03 | 中部増成機械工業株式会社 | 冷媒回収装置 |
| JP2004028018A (ja) * | 2002-06-27 | 2004-01-29 | Mitsubishi Heavy Ind Ltd | 圧縮機の無負荷試験装置及び試験方法 |
| JP2013513776A (ja) * | 2009-12-11 | 2013-04-22 | レール・リキード−ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | 低温冷却/液化のための方法および装置 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0765585B2 (ja) | 1988-09-28 | 1995-07-19 | 株式会社日立製作所 | 半導体製造装置に用いるドライスクリュ真空ポンプ |
| JP2001107891A (ja) | 1999-10-07 | 2001-04-17 | Mitsubishi Heavy Ind Ltd | 遠心多段型圧縮機 |
| US20030073788A1 (en) | 2001-10-12 | 2003-04-17 | Golden Timothy Christopher | Recovery of olefin monomers |
| JP3729496B2 (ja) | 2002-09-26 | 2005-12-21 | 阿部化学 株式会社 | 回収冷媒再生装置 |
| JP3816066B2 (ja) | 2003-06-17 | 2006-08-30 | 大旺建設株式会社 | 回収フロンの再生方法 |
| EP2376821B1 (en) * | 2008-12-15 | 2013-07-10 | Flowserve Management Company | Seal leakage gas recovery system |
| US20120036890A1 (en) | 2009-05-14 | 2012-02-16 | Exxonmobil Upstream Research Company | Nitrogen rejection methods and systems |
| JP2011052620A (ja) * | 2009-09-03 | 2011-03-17 | Mitsubishi Heavy Industries Compressor Corp | ドライガスシールからのリークガス回収装置 |
| IT1397059B1 (it) | 2009-11-23 | 2012-12-28 | Nuovo Pignone Spa | Sistema di sigillo per gas secco a bassa emissione per compressori |
| JP5419720B2 (ja) | 2010-01-13 | 2014-02-19 | 三菱重工コンプレッサ株式会社 | ブタジエンガス圧縮機のシールガス温度制御装置 |
| GB201218949D0 (en) * | 2012-10-22 | 2012-12-05 | Bp Alternative Energy Internat Ltd | Separatiion of components from a gas mixture |
| WO2016103479A1 (ja) | 2014-12-26 | 2016-06-30 | 三菱重工コンプレッサ株式会社 | 圧縮機用のガス回収システム、圧縮機システム及び冷凍サイクルシステム |
-
2015
- 2015-04-27 JP JP2017515298A patent/JP6362292B2/ja not_active Expired - Fee Related
- 2015-04-27 US US15/562,230 patent/US10337779B2/en active Active
- 2015-04-27 WO PCT/JP2015/062656 patent/WO2016174706A1/ja not_active Ceased
- 2015-04-27 EP EP15890690.9A patent/EP3264011A4/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3016404U (ja) * | 1995-03-31 | 1995-10-03 | 中部増成機械工業株式会社 | 冷媒回収装置 |
| JP2004028018A (ja) * | 2002-06-27 | 2004-01-29 | Mitsubishi Heavy Ind Ltd | 圧縮機の無負荷試験装置及び試験方法 |
| JP2013513776A (ja) * | 2009-12-11 | 2013-04-22 | レール・リキード−ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | 低温冷却/液化のための方法および装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3264011A4 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11209009B2 (en) * | 2017-02-02 | 2021-12-28 | Mitsubishi Heavy Industries Compressor Corporation | Rotating machine |
| WO2019040521A1 (en) * | 2017-08-21 | 2019-02-28 | GE Oil & Gas, LLC | RECOVERY OF REFRIGERANT FLUID AND NITROGEN |
| KR20200033968A (ko) * | 2017-08-21 | 2020-03-30 | 쥐이 오일 & 가스, 엘엘씨 | 냉매 및 질소 회수 |
| CN111108335A (zh) * | 2017-08-21 | 2020-05-05 | 通用电气石油和天然气有限责任公司 | 制冷剂和氮气回收 |
| AU2018320785B2 (en) * | 2017-08-21 | 2021-07-15 | GE Oil & Gas, LLC | Refrigerant and nitrogen recovery |
| EP3673219A4 (en) * | 2017-08-21 | 2021-10-06 | GE Oil & Gas, LLC | REFRIGERANT AND NITROGEN RECOVERY |
| KR102391748B1 (ko) * | 2017-08-21 | 2022-04-28 | 베이커 휴즈 에너지 서비시즈 엘엘씨 | 냉매 및 질소 회수 |
| CN111108335B (zh) * | 2017-08-21 | 2022-07-05 | 贝克休斯能源服务有限责任公司 | 制冷剂和氮气回收 |
| JP2019044833A (ja) * | 2017-08-31 | 2019-03-22 | 三菱重工業株式会社 | 軸封装置およびタービン発電システム |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3264011A4 (en) | 2018-01-17 |
| US10337779B2 (en) | 2019-07-02 |
| JP6362292B2 (ja) | 2018-07-25 |
| US20180120007A1 (en) | 2018-05-03 |
| JPWO2016174706A1 (ja) | 2018-02-15 |
| EP3264011A1 (en) | 2018-01-03 |
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