WO2023120031A1 - 浮体及び浮体の不活性ガス排出方法 - Google Patents
浮体及び浮体の不活性ガス排出方法 Download PDFInfo
- Publication number
- WO2023120031A1 WO2023120031A1 PCT/JP2022/043530 JP2022043530W WO2023120031A1 WO 2023120031 A1 WO2023120031 A1 WO 2023120031A1 JP 2022043530 W JP2022043530 W JP 2022043530W WO 2023120031 A1 WO2023120031 A1 WO 2023120031A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ammonia
- mixed gas
- inert gas
- tank
- gas
- 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.)
- Ceased
Links
Images
Classifications
-
- 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
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
- B63J2/14—Heating; Cooling of liquid-freight-carrying 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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under pressure
-
- 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
- F17C13/005—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
-
- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- 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
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4525—Gas separation or purification devices adapted for specific applications for storage and dispensing systems
-
- 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
- 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
- F17C2205/0341—Filters
-
- 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
- F17C2221/01—Pure fluids
-
- 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
-
- 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
- F17C2223/03—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
- 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
- F17C2227/04—Methods for emptying or filling
- F17C2227/044—Methods for emptying or filling by purging
-
- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
-
- 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
- F17C2260/05—Improving chemical properties
- F17C2260/056—Improving fluid characteristics
-
- 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
- F17C2265/01—Purifying the fluid
- F17C2265/015—Purifying the fluid by separating
-
- 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
- F17C2265/032—Treating the boil-off by recovery
- F17C2265/033—Treating the boil-off by recovery with cooling
- F17C2265/034—Treating the boil-off by recovery with cooling with condensing the gas phase
-
- 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
- F17C2265/032—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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
Definitions
- the present disclosure relates to a floating body and an inert gas discharge method for the floating body.
- This application claims priority based on Japanese Patent Application No. 2021-207357 filed in Japan on December 21, 2021, the content of which is incorporated herein.
- Patent Document 1 discloses a technique for liquefying and separating ammonia gas from a product gas obtained by reacting a mixed gas of nitrogen and hydrogen under pressure. However, liquefying and separating ammonia gas consumes a large amount of energy. Therefore, Patent Document 1 proposes synthesizing ammonia by electrolysis and separating and recovering ammonia using an ammonia separation membrane. ing.
- ammonia which is a decarbonized fuel
- BOG Boil Off Gas
- inert gas such as seal gas used in devices such as pumps and purge gas used to replace the atmosphere in piping may be mixed into the BOG.
- contamination of the BOG with an inert gas causes a decrease in the reliquefaction efficiency of the BOG and a decrease in the amount of heat when the BOG is used as a fuel.
- the present disclosure has been made in view of the above circumstances, and provides a floating body capable of easily discharging inert gas and an inert gas discharge method for the floating body.
- a floating body main body floating on water a tank in which ammonia is stored together with an inert gas, and a mixed gas introduction part into which a mixed gas of the inert gas and the ammonia is introduced.
- a cooling section for cooling the mixed gas in the mixed gas introduction section at a temperature at which only the ammonia in the mixed gas can be condensed; and an atmosphere opening line for opening the inert gas in the mixed gas introduction section to the atmosphere.
- a pressure regulating valve that adjusts the pressure in the mixed gas introducing portion when the inert gas is released to the atmosphere to a pressure that can maintain the ammonia in a liquid phase.
- the inert gas discharge method for a floating body in which ammonia is stored together with the inert gas, wherein the mixed gas of the inert gas and the ammonia is introduced. Inside the mixed gas introduction part, the mixed gas is cooled to condense only the ammonia, and the inert gas is released into the atmosphere. The pressure inside the mixed gas introduction part is adjusted to a pressure that can maintain the condensed ammonia in a liquid phase.
- the inert gas can be discharged easily.
- FIG. 1 is a diagram showing schematic configurations of a fuel supply system, a purge system, and a BOG processing system in the first embodiment of the present disclosure
- FIG. 2 is a Mollier diagram of ammonia with pressure on the vertical axis and specific enthalpy on the horizontal axis.
- FIG. 4 is a diagram showing the configuration of a BOG processing system in a modified example of the first embodiment of the present disclosure
- FIG. 5 is a diagram showing the configuration of a BOG processing system in the second embodiment of the present disclosure
- FIG. FIG. 10 is a diagram showing an inert gas separator and cooling device in a first modification of the second embodiment of the present disclosure;
- FIG. 10 is a diagram showing the configuration of a BOG processing system in a second modified example of the second embodiment of the present disclosure
- FIG. 10 is a diagram showing the configuration of a BOG processing system in the third embodiment of the present disclosure
- FIG. 9 is a diagram corresponding to FIG. 8 in the fourth embodiment of the present disclosure
- FIG. 10 is a diagram corresponding to FIG. 9 in the fifth embodiment of the present disclosure
- FIG. 11 is a diagram corresponding to FIG. 10 in a modified example of the fifth embodiment of the present disclosure;
- the floating body 1 of the first embodiment includes a floating body body 2, an upper structure 4, a combustion device 8, an ammonia tank 10, a fuel supply system 20, and a gas supply system 30. , a purge system 40 , an ammonia recovery system 50 , and a BOG treatment system 60 .
- a ship using ammonia as a fuel will be described as an example.
- the type of ship of this floating body 1 is not limited to a specific one. Examples of ship types of the floating body 1 include liquefied gas carriers, ferries, RO-RO ships, car carriers, and passenger ships.
- the floating body body 2 has a pair of shipboard sides 5A and 5B and a ship bottom 6 that form its outer shell.
- the shipboard sides 5A, 5B are provided with a pair of shipboard skins forming the starboard and port sides, respectively.
- the ship's bottom 6 includes a ship's bottom shell plate that connects the sides 5A and 5B.
- the pair of sides 5A and 5B and the ship bottom 6 form a U-shaped outer shell of the floating body 2 in a cross section perpendicular to the fore-aft direction FA.
- the floating body body 2 further includes an upper deck 7 which is a through deck arranged in the uppermost layer.
- the superstructure 4 is formed on this upper deck 7 .
- a living quarter and the like are provided in the upper structure 4 .
- a cargo space (not shown) for loading cargo is provided on the bow 3a side in the fore-aft direction FA from the superstructure 4. As shown in FIG.
- the combustion device 8 is a device that generates thermal energy by burning fuel, and is provided inside the floating body main body 2 described above.
- Examples of the combustion device 8 include an internal combustion engine used as a main engine for propelling the floating body 1, an internal combustion engine used for power generation equipment that supplies electricity to the ship, a boiler that generates steam as a working fluid, and the like.
- the combustion device 8 of the present embodiment can switch between ammonia and another fuel different from ammonia, such as light oil, as fuel.
- the ammonia tank 10 is a tank that stores liquid ammonia (in other words, liquefied ammonia).
- the ammonia tank 10 is installed on the upper deck 7 on the stern 3b side of the superstructure 4. As shown in FIG.
- the arrangement of the ammonia tank 10 is an example, and is not limited to the upper deck 7 on the stern 3b side of the superstructure 4.
- the ammonia tank 10 of this embodiment stores liquefied ammonia as fuel for the combustion device 8 .
- the fuel supply system 20 connects the combustion device 8 and the ammonia tank 10 and is configured to supply at least ammonia stored in the ammonia tank 10 to the combustion device 8 .
- the fuel supply system 20 includes a supply line 21 and a return line 22.
- the supply line 21 is a pipe connecting the ammonia tank 10 and the combustion device 8 .
- Ammonia as fuel flows through the supply line 21 from the ammonia tank 10 toward the combustion device 8 . That is, ammonia stored in the ammonia tank 10 is introduced into the combustion device 8 through the supply line 21 .
- the supply line 21 includes a pump (not shown) for pressure-feeding ammonia from the ammonia tank 10 to the combustion device 8, and a heat source for adjusting the temperature of the ammonia in the supply line 21 guided to the combustion device 8 by the pump.
- An exchanger (not shown) and the like are provided.
- the return line 22 is a pipe connecting the combustion device 8 and the ammonia tank 10 . One end of the return line 22 is connected to the combustion device 8 and the other end is connected to the ammonia tank 10 . A return line 22 returns excess ammonia left unburned in the combustion device 8 to the ammonia tank 10 .
- the gas supply system 30 is a system that supplies an inert gas for performing so-called purging, in which the ammonia in the distribution route R through which ammonia as the fuel of the combustion device 8 flows is replaced with an inert gas (purge gas) such as nitrogen.
- the gas supply system 30 includes an inert gas supply section 34 , an inert gas supply pipe 35 and an inert gas supply valve 36 .
- the inert gas include an inert gas generated inside the floating body 2 by an inert gas generator (not shown), and an inert gas stored in an inert gas tank (not shown) provided in the floating body 2. Any inert gas can be used.
- the inert gas may be any gas that does not chemically react when it comes into contact with ammonia, and nitrogen is used as the inert gas in this embodiment.
- the inert gas supply unit 34 supplies inert gas to the inert gas supply pipe 35 .
- the inert gas supply pipe 35 connects the inert gas supply section 34 and the distribution route R. More specifically, the inert gas supply pipe 35 connects the inert gas supply section 34 and the purge target region of the distribution route R through which ammonia as fuel flows.
- the regions to be purged exemplified in this embodiment are the supply line 21 , the return line 22 , and the distribution route R formed inside the combustion device 8 .
- the inert gas supply pipe 35 exemplified in this embodiment is connected to the purge target region of the supply line 21 among the purge target regions.
- the inert gas supply valve 36 is provided on the inert gas supply pipe 35 .
- the inert gas supply valve 36 is normally closed to block the supply of inert gas from the inert gas supply unit 34 to the purge target region.
- the normal time is when ammonia can be supplied to the combustion device 8, such as when the combustion device 8 is in operation. In this normal state, ammonia can be supplied from the ammonia tank 10 through the supply line 21 to the combustion device 8 , and excess ammonia is returned from the combustion device 8 through the return line 22 to the ammonia tank 10 .
- the inert gas supply valve 36 is opened from the closed state when the combustion device 8 is stopped for an emergency or for a long period of time. In other words, it is operated from the closed state to the open state when purging ammonia remaining in the purge target area. At this time, the supply of ammonia from the ammonia tank 10 to the combustion device 8 is stopped. Next, when the inert gas supply valve 36 is opened from the closed state, the inert gas can be supplied from the inert gas supply unit 34 to the purge target region.
- the purge system 40 is a system that guides ammonia remaining in the distribution path R of the supply line 21 , the combustion device 8 , and the return line 22 to the ammonia tank 10 .
- the purge system 40 in this embodiment includes a purge line 37 and a purge valve 38 .
- the purge line 37 includes a first purge line 37 a connected to the supply line 21 and a second purge line 37 b connected to the return line 22 . These purge lines 37 guide the fluid discharged from the supply line 21 and the return line 22 by purging to the ammonia recovery system 50 . In this embodiment, the fluid discharged through the purge line 37 is introduced into the temporary reservoir 51 of the ammonia recovery system 50 .
- One purge valve 38 is provided in each of the purge lines 37 .
- the purge valve 38 is normally closed.
- the purge valve 38 is opened at the timing when the gas supply system 30 starts supplying the inert gas or at a predetermined timing after the gas supply system 30 starts supplying the inert gas.
- a mixed fluid of inert gas and ammonia is introduced into the temporary reservoir 51 through the purge line 37 . Then, the ammonia remaining in the supply line 21, the combustion device 8, and the distribution path R of the return line 22 is replaced with inert gas.
- the ammonia recovery system 50 is a system that returns ammonia discharged from the fuel supply system 20 via the purge system 40 together with the inert gas to the ammonia tank 10 .
- the ammonia recovery system 50 includes a temporary storage section 51 and a recovery line 52 .
- the temporary storage portion 51 is a container that temporarily stores the fluid discharged from the fuel supply system 20 by the purge system 40 .
- the liquid ammonia stored in the temporary storage section 51 may be vaporized.
- the recovery line 52 is a pipe for guiding the mixed fluid containing ammonia from the temporary reservoir 51 to the ammonia tank 10 .
- the recovery line 52 communicates the internal space of the temporary reservoir 51 and the gas phase of the ammonia tank 10 .
- the mixed fluid of the inert gas and ammonia stored in the temporary reservoir 51 is transferred to the recovery line using the pressure of the fluid discharged by the purge system 40, the differential pressure between the ammonia tank 10 and the temporary reservoir 51, and the like. 52 into the ammonia tank 10 .
- the mixed fluid may be introduced into the ammonia tank 10 using a pump, blower, or the like.
- ammonia recovery system 50 includes an oil catch tank that extracts and recovers the oil stored in the temporary storage section 51 to the outside of the temporary storage section 51, and a recovery line 52 that flows together with ammonia and other gases.
- An oil mist separator may be included for collecting oil mist in the oil catch tank.
- the BOG treatment system 60 is a system for treating a mixed gas of inert gas and ammonia.
- the mixed gas in the present embodiment is a gas present in the gas phase of the ammonia tank 10, and is mainly composed of BOG (boil off gas) generated by vaporization of the liquefied ammonia in the ammonia tank 10, and the ammonia recovery system 50. and gas of the mixed fluid flowing from.
- BOG blow off gas
- the mixed gas of the ammonia gas and the inert gas existing in the gas phase of the ammonia tank 10 is simply referred to as mixed gas.
- the BOG treatment system 60 includes a first treatment line 61, a mist separator 62, a second treatment line 63, a compressor 64, a third treatment line 65, a condenser 66, a reliquefaction line 67, and an expansion valve. 68 , an atmosphere release line 69 , a pressure regulating valve 70 , a cutoff valve 71 , a pressure detection section 72 and an ammonia detection section 73 .
- the first treatment line 61 is a pipe that guides the mixed gas in the ammonia tank 10 to the mist separator 62 .
- the mist separator 62 removes droplets from the mixed gas introduced into the first processing line 61 .
- the mixed gas from which droplets have been removed by the mist separator 62 is substantially gas only.
- the droplets removed by the mist separator 62 are returned to a tank such as the ammonia tank 10 in which liquefied ammonia is stored via a pipe (not shown). Note that the mist separator 62 may be omitted when the mixed gas flowing through the first processing line 61 does not contain liquid droplets, or when the mist separator 62 is not required.
- the second processing line 63 is a pipe that guides the mixed gas from which droplets have been removed by the mist separator 62 to the compressor 64 .
- Compressor 64 compresses the mixed gas introduced by second processing line 63 .
- the mixed gas compressed by the compressor 64 rises in temperature to become a high-temperature and high-pressure mixed gas.
- a compressor used in an engine or the like different from the combustion device 8 (main engine) or a gas compressor of a reliquefaction device can be exemplified.
- the third processing line 65 is a pipe that guides the mixed gas compressed by the compressor 64 to the condenser 66 .
- the condenser 66 cools the high-pressure mixed gas compressed by the compressor 64 to condense only ammonia. In other words, only the ammonia gas is condensed (liquefied) without condensing the inert gas in the mixed gas.
- the condenser 66 includes a casing (mixed gas introduction section) 75 and a heat exchange section (cooling section) 76 .
- the casing 75 defines a cooling space 77 for cooling the mixed gas introduced from the first processing line 61 .
- a reliquefaction line 67 is connected to the casing 75 .
- the heat exchange unit 76 is installed in the cooling space 77 of the casing 75, and cools the mixed gas by exchanging heat between the mixed gas introduced into the cooling space 77 and the refrigerant supplied from the outside of the condenser 66. .
- the heat exchange section 76 cools the mixed gas in the casing 75 to a temperature at which only ammonia in the mixed gas can be condensed. More specifically, the heat exchange section 76 cools the mixed gas introduced into the cooling space 77 of the casing 75 to a temperature at which only ammonia can be condensed under the pressure of the mixed gas.
- water around the floating body 1 for example, seawater
- fresh water stored in a fresh water tank inside the floating body 1, or the like can be exemplified.
- an air release line 69 is connected to the upper portion of the casing 75 .
- the atmosphere release line 69 allows the gas inside the casing 75 to be released to the atmosphere. More specifically, one end of the open-to-air line 69 is connected to the uppermost position in the cooling space 77 formed in the casing 75 where uncondensed gas accumulates. Also, the other end of the atmosphere release line 69 can be connected to, for example, a vent post (not shown) or the like.
- the casing 75 of this embodiment includes a casing main body 78 that covers the heat exchange section 76 and a tower space (storage space) 79 that protrudes upward from the casing main body 78 and forms a part of the cooling space 77 inside.
- a vessel tower section 80 is provided.
- the casing 75 of the present embodiment is intentionally provided with the condenser tower section 80 to provide a place where the gas that has not been condensed even after being cooled by the heat exchange section 76 (a gas consisting essentially of an inert gas) is accumulated. ing. As a result, the inert gas remaining in the casing 75 without being condensed can be released into the atmosphere through the atmosphere release line 69 .
- the condenser tower section 80 of this embodiment is formed to have a diameter larger than that of the atmosphere release line 69 .
- the height of the condenser tower section 80 may be any height that allows the position of the upper end of the tower space 79 to be above the top of the space within the casing 75 .
- the pressure detection section 72 detects the pressure inside the casing 75 .
- the pressure detection unit 72 of this embodiment detects the internal pressure of the tower space 79 , in other words, the gas phase pressure of the tower space 79 .
- the pressure detector 72 of this embodiment outputs the detection result to the pressure regulating valve 70 .
- the pressure regulating valve 70 is provided in the atmosphere release line 69, and is capable of adjusting the pressure inside the casing 75 when the inert gas is released to the atmosphere to a pressure that can maintain the ammonia in the liquid phase.
- the pressure regulating valve 70 of this embodiment automatically adjusts the opening degree of the valve based on the detection result of the pressure detection unit 72 so that the pressure inside the casing 75 is within a pressure range capable of maintaining ammonia in the liquid phase. are doing. That is, the pressure regulating valve 70 regulates the pressure in the cooling space 77 and the tower space 79 so that the pressure in the casing 75 does not drop too much and the condensed ammonia does not evaporate again.
- FIG. 3 is a Mollier diagram of ammonia with pressure on the vertical axis and specific enthalpy on the horizontal axis.
- the condenser 66 of the present embodiment cools the mixed gas and condenses ammonia in a state in which the pressure inside the casing 75 is set to 23 bar (hereinafter simply referred to as high pressure).
- the pressure regulating valve 70 is arranged so that the pressure in the casing 75 does not drop below 21 bar (hereinafter simply referred to as "low pressure") when the inert gas is released to the atmosphere through the atmosphere release line 69.
- the valve opening is adjusted to As a result, when the inert gas is released to the atmosphere, the width of the decrease in the specific enthalpy at high pressure (the width of supercooling in FIG. 3) can be minimized, and at low pressure, the liquefied ammonia Since it is not vaporized again, it is possible to release only the inert gas to the atmosphere.
- the ammonia detection unit 73 is capable of detecting the gas phase ammonia concentration inside the casing 75 .
- the ammonia detection unit 73 of the present embodiment detects the gas phase ammonia concentration in the tower space 79 .
- the ammonia detection unit 73 of this embodiment outputs the detection result to the cutoff valve 71 .
- the ammonia detection unit 73 is not limited to detecting the concentration of ammonia, and for example, a density meter capable of measuring the density of ammonia may be used.
- the shutoff valve 71 shuts off the atmosphere release line 69 when the gas phase ammonia concentration inside the casing 75 is higher than a predetermined upper limit value.
- the shutoff valve 71 opens the atmosphere release line 69 when the gas phase ammonia concentration inside the casing 75 is lower than the predetermined lower threshold.
- the shutoff valve 71 of the present embodiment automatically shuts off the atmosphere release line 69 when the ammonia concentration is higher than a predetermined upper limit value based on the detection result of the ammonia detection unit 73, while the ammonia concentration exceeds a predetermined value.
- the atmosphere release line 69 is automatically opened. In other words, when uncondensed ammonia gas remains in the gas phase inside the casing 75, the shutoff valve 71 prevents this ammonia gas from being released into the atmosphere together with the inert gas.
- the reliquefaction line 67 is a pipe that returns the ammonia (liquid) condensed by the condenser 66 to the ammonia tank 10 via the expansion valve 68 .
- the expansion valve 68 reduces the pressure of the ammonia condensed by the condenser 66 to adiabatically expand the ammonia to lower the temperature. This temperature-lowered liquid ammonia is returned to the ammonia tank 10 via a reliquefaction line 67 .
- the compressor 64, the condenser 66, and the expansion valve 68 described above constitute a reliquefying device for reliquefying BOG.
- the casing 75 further includes a casing main body 78 and a condenser tower section that protrudes upward from the upper portion of the casing main body 78 and forms a tower space 79 capable of storing inert gas. 80 and .
- the atmospheric release line 69 is then connected to the condenser tower section 80 .
- the inert gas can be discharged from the tower space 79 arranged higher in the space inside the casing 75 . Therefore, it is possible to prevent condensed ammonia from being mixed into the gas discharged through the atmosphere release line 69 .
- the pressure detecting section 72 that detects the pressure in the tower space 79 is further provided, and the pressure regulating valve 70 detects that the internal pressure of the casing 75 is ammonia based on the detection result of the pressure detecting section 72.
- the valve opening is adjusted so that the pressure range can be maintained in the liquid phase.
- the ammonia detector 73 capable of detecting the concentration of ammonia in the tower space 79 and the cutoff valve 71 capable of opening and closing the atmospheric release line 69 are further provided. Then, based on the detection result of the ammonia detector 73, the shutoff valve 71 shuts off the atmosphere release line 69 when the ammonia concentration is higher than a predetermined upper limit value, and when the ammonia concentration is lower than a predetermined lower limit threshold value. opens the atmosphere release line 69 .
- the concentration of ammonia in the tower space 79 is high, it is possible to suppress the release of ammonia-containing gas into the atmosphere through the atmosphere release line 69 . Further, when the concentration of ammonia is sufficiently low, the inert gas contained in the gas phase inside the casing 75 can be removed by discharging the inert gas into the atmosphere through the atmosphere release line 69. .
- the mixed gas is cooled inside the casing 75 of the condenser 66 into which the mixed gas of the inert gas and ammonia is introduced to remove only ammonia.
- the pressure inside the casing 75 of the condenser 66 is set to a pressure that can maintain the condensed ammonia in the liquid phase when releasing the inert gas into the atmosphere. is adjusted to As a result, only the ammonia present in the gas phase inside the casing 75 of the condenser 66 can be liquefied and only the inert gas can remain in the gas phase inside the casing 75 .
- FIG. 4 is a diagram showing the configuration of the BOG processing system in the modified example of the first embodiment of the present disclosure.
- the gas-phase mixed gas is cooled by the heat exchange section 76 provided inside the casing main body section 78 to condense ammonia.
- a cooling device 81 that cools the gas in the tower space 79 may be provided separately from the heat exchange section 76 .
- the mixed gas existing in the tower space 79 which is separated upward from the liquid phase in the ammonia tank 10 is cooled, and the ammonia gas contained in the gas is cooled. can be condensed and moved below the tower space 79 by its own weight. Therefore, ammonia contained in the gas released into the atmosphere from the atmosphere release line 69 can be further reduced.
- FIG. 5 is a diagram showing the configuration of the BOG processing system in the second embodiment of the present disclosure. As shown in FIGS.
- the floating body of the second embodiment includes a floating body body 2, an upper structure 4, a combustion device 8, an ammonia tank 10, a fuel supply system 20, a gas supply system 30, A purge system 40 , an ammonia recovery system 50 and a BOG treatment system 260 are provided.
- the BOG treatment system 260 includes a first treatment line (mixed gas delivery line) 61, a mist separator 62, a second treatment line 63, a compressor 64, a third treatment line 65, Condenser 266, reliquefaction line 67, expansion valve 68, inert gas separator (mixed gas introduction section) 280, condenser communication line 82, atmosphere release line 69, pressure control valve 70, shut off A valve 71 , a pressure detector 72 , and an ammonia detector 73 are provided.
- the inert gas separator 280 is arranged above the condenser 266 and forms a storage space 279 capable of storing the mixed gas.
- the inert gas separator 280 of this embodiment has a vertically long shape.
- the volume of reservoir space 279 within inert gas separator 280 is smaller than the volume of the gas phase within casing 75 .
- the inert gas separator 280 of this embodiment has a cylindrical separator main body 83 and end plate parts 84 closing the upper and lower edges of the separator main body 83 .
- the atmosphere release line 69 of this embodiment is connected to the upper end plate portion 84 of the inert gas separator 280 .
- the condenser communication line 82 is a pipe that communicates between the gas phase inside the casing 75 of the condenser 266 and the storage space 279 of the inert gas separator 280 .
- One end of the condenser communication line 82 of this embodiment is connected to the upper wall of the casing 75, and the other end of the condenser communication line 82 is connected to the lower end plate portion 84 of the inert gas separator 280.
- the condenser communication line 82 of this embodiment has a smaller diameter than the horizontal cross-sectional profile of the separator body 83 of the inert gas separator 280 .
- a plurality of condenser communication lines 82 may be provided in parallel.
- the pressure detector 72 detects the pressure inside the inert gas separator 280 .
- the pressure detector 72 of this embodiment detects the pressure in the reservoir space 279 of the inert gas separator 280 .
- the pressure detector 72 outputs the detection result to the pressure regulating valve 70, like the pressure detector 72 of the first embodiment.
- the pressure regulating valve 70 is provided in the atmosphere release line 69, and is capable of adjusting the pressure inside the inert gas separator 280 when the inert gas is released to the atmosphere to a pressure that can maintain the ammonia in the liquid phase. ing.
- the pressure regulating valve 70 of the present embodiment automatically adjusts the opening degree of the valve based on the detection result of the pressure detection unit 72 so that the pressure in the storage space 279 is within a pressure range capable of maintaining ammonia in the liquid phase. ing. That is, the pressure regulating valve 70 prevents the pressure in the casing 75 from dropping too much and the condensed ammonia from re-vaporizing.
- the ammonia detection unit 73 is capable of detecting the gas phase ammonia concentration inside the inert gas separator 280 .
- the ammonia detection unit 73 of this embodiment detects the gas phase ammonia concentration in the storage space 279 .
- the ammonia detection unit 73 outputs the detection result to the shutoff valve 71, like the ammonia detection unit 73 of the first embodiment.
- the ammonia detection unit 73 is not limited to detecting the concentration of ammonia, and for example, a density meter capable of measuring the density of ammonia may be used.
- the shutoff valve 71 shuts off the atmosphere release line 69 when the gas phase ammonia concentration inside the inert gas separator 280 is higher than a predetermined upper limit value.
- the shutoff valve 71 opens the atmosphere relief line 69 when the gas phase ammonia concentration inside the inert gas separator 280 is lower than the predetermined lower threshold.
- the shutoff valve 71 of the present embodiment shuts off the atmosphere release line 69 when the ammonia concentration is higher than a predetermined upper limit based on the detection result of the ammonia detector 73, while the ammonia concentration is higher than the predetermined lower limit threshold. is also low, the atmosphere release line 69 is opened. In other words, when uncondensed ammonia gas remains in the gas phase inside the inert gas separator 280, the shut-off valve 71 prevents this ammonia gas from being released to the atmosphere together with the inert gas.
- an inert gas separator 280 is provided at a remote location above the condenser 266 to separate the gas phase in the casing 75 of the condenser 266 from the reservoir space 279 of the inert gas separator 280. They are communicated by a condenser communication line 82 .
- the inert gas that has not been condensed in the gas phase within the casing 75 of the condenser 266 is guided to the storage space 279 of the inert gas separator 280 via the condenser communication line 82, and It is possible to release the gas from the storage space 279 of 280 to the atmosphere through the atmosphere release line 69 .
- the inert gas cooled by the condenser 266 causes the storage space of the inert gas separator 280 to Space 279 can also condense ammonia. Then, the ammonia condensed in the storage space 279 can be moved by its own weight into the casing 75 of the condenser 266 via the condenser communication line 82 . Therefore, by separating the condenser 266 and the atmosphere release line 69, it is possible to further suppress the discharge of ammonia through the atmosphere release line 69, so that the inert gas remaining in the gas phase of the ammonia tank 10 can be efficiently removed. can be removed well.
- the storage space 279 can be easily added to the casing 75 of the existing condenser. It becomes possible.
- the mixed gas is cooled inside the inert gas separator 280 into which the mixed gas of the inert gas and ammonia is introduced to remove only ammonia.
- the pressure inside the inert gas separator 280 is set to a pressure that can maintain the condensed ammonia in the liquid phase when releasing the inert gas to the atmosphere. is adjusted to As a result, only the ammonia present in the gas phase inside the inert gas separator 280 can be liquefied and only the inert gas can remain in the gas phase inside the inert gas separator 280 .
- FIG. 6 is a diagram showing an inert gas separator and cooling device in a first modification of the second embodiment of the present disclosure.
- the mixed gas is cooled by the heat exchange section 76 provided in the cooling space 77 of the casing 75 to condense the ammonia, but the configuration is not limited to this.
- This cooling device 281 cools the mixed gas at a temperature equivalent to that of the heat exchange section 76 of the condenser 266 .
- the gas present in the storage space 279 of the inert gas separator 280 is actively cooled, and the ammonia gas contained in the gas is removed. It can be condensed and moved into the casing 75 of the condenser 266 through the condenser communication line 82 by its own weight. Therefore, ammonia contained in the gas released into the atmosphere from the atmosphere release line 69 can be further reduced.
- FIG. 7 is a diagram showing the configuration of the BOG processing system in the second modified example of the second embodiment of the present disclosure.
- the ammonia condensed in the storage space 279 of the inert gas separator 280 moves into the casing 75 of the condenser 266 through the condenser communication line 82 was explained.
- a liquefied gas confluence line 85 may be provided to allow the gas to flow.
- the end connected to the inert gas separator 280 is connected to the separator body 83 of the inert gas separator 280. connected to the bottom. Furthermore, the upper end of the liquefied gas merging line 85 is connected to the lower end plate portion 84 of the inert gas separator 280, and the lower end of the liquefied gas merging line 85 is connected to the re-liquefaction line 67. It should be noted that the cooling device 281 may be provided in this second modification as well as in the first modification.
- the mixed gas is smoothly introduced from the vapor phase of the condenser 266 into the storage space 279 of the inert gas separator 280 through the condenser communication line 82.
- the ammonia condensed in the storage space 279 of the inert gas separator 280 is allowed to smoothly join the reliquefaction line 67 through the liquefied gas joining line 85 by its own weight, and stored in the ammonia tank 10.
- the ammonia tank 10 is provided with the same structure as the condenser tower section 80 provided in the condenser 66 of the modified example of the first embodiment described above. Therefore, in this third embodiment, FIG. 1 is used, and the same parts as those in the modified example of the first embodiment described above are given the same reference numerals for description, and overlapping descriptions are omitted.
- FIG. 8 is a diagram showing the configuration of the BOG processing system in the third embodiment of the present disclosure.
- the floating body 1 in the third embodiment includes a floating body body 2, an upper structure 4, a combustion device 8, an ammonia tank 310, a fuel supply system 20, and a gas supply system 30. , a purge system 40 , an ammonia recovery system 50 , and a BOG treatment system 360 . That is, in the vapor phase of the ammonia tank 310 of this third embodiment, as in the first embodiment, an inert gas is introduced.
- the BOG processing system 360 includes a tank tower section (mixed gas introduction section) 90, a cooling section 95, an atmosphere release line 69, a pressure regulating valve 70, a cutoff valve 71, and a pressure detection section. 72 and an ammonia detector 73 .
- the tank tower portion 90 is formed to protrude upward from the upper wall 91 of the ammonia tank 310 .
- the tank tower section 90 forms a tower space (storage space) 92 that communicates with the gas phase inside the ammonia tank 310 . That is, the tower space 92 of the tank tower section 90 can store the mixed gas present in the gas phase of the ammonia tank 310 .
- the tank tower portion 90 exemplified in the third embodiment includes a tower main body portion 93 that cylindrically extends upward from the upper wall of the ammonia tank 310, and an end plate portion 94 that closes the upper edge of the tower main body portion 93. I have.
- the tower body portion 93 of this embodiment is formed to have a diameter larger than that of the atmosphere release line 69 .
- the height of the tank tower section 90 may be any height that allows the position of the upper end of the tower space 92 to be above the top of the vapor phase of the ammonia tank 310 .
- the tank tower portion 90 is arranged at the center of the upper wall 91 of the ammonia tank 310, but the tank tower portion 90 is arranged at the center of the upper wall 91. not limited to departments.
- the cooling section 95 cools the mixed gas in the tower space 92 in the tank tower section 90 to liquefy the ammonia contained in the mixed gas.
- the pressure in the tower space 92 in the tank tower section 90 is lower than the pressure in the casing 75 of the condenser 66 of the first embodiment (for example, slightly higher than the atmospheric pressure). Therefore, the cooling unit 95 of the third embodiment has cooling performance higher than that of each of the cooling devices 81 of the modified example of the first embodiment and the first modified example of the second embodiment. In other words, the cooling unit 95 has a cooling performance capable of cooling the mixed gas to a temperature at which the ammonia contained in the mixed gas can be condensed under the gas phase pressure of the ammonia tank 310 .
- an absorption chiller, a vapor compression chiller, or the like can be exemplified.
- the atmosphere release line 69 is capable of releasing the gas in the tower space 92 to the atmosphere.
- the atmosphere release line 69 of this embodiment is connected to the uppermost position of the cooling space 77 formed in the tower space 92 .
- the gas substantially composed of only inert gas
- the atmosphere release line 69 can be released into the atmosphere from the top of the tower space 92 through the atmosphere release line 69.
- the pressure detection section 72 detects the pressure inside the tank tower section 90 .
- the pressure detector 72 of this embodiment detects the internal pressure of the tower space 92 .
- the internal pressure of the tower space 92 in this embodiment is substantially the same as the gas phase pressure of the ammonia tank 310 .
- the pressure detector 72 of this embodiment outputs the detection result to the pressure regulating valve 70 .
- the pressure regulating valve 70 is provided in the atmosphere release line 69, and is capable of adjusting the pressure in the tank tower portion 90 when releasing the inert gas into the atmosphere to a pressure that can maintain the ammonia in the liquid phase. .
- the pressure regulating valve 70 of the present embodiment automatically adjusts the valve opening degree based on the detection result of the pressure detection unit 72 so that the pressure in the tower space 92 is within a pressure range capable of maintaining ammonia in the liquid phase. ing. That is, the pressure regulating valve 70 prevents the ammonia condensed by the cooling section 95 from being vaporized again in the tower space 92 when the pressure in the tower space 92 is too low.
- the vapor-phase mixed gas inside the ammonia tank 310 can be introduced into the tower space 92 of the tank tower section 90 and the mixed gas in the tower space 92 can be cooled by the cooling section 95. can. Therefore, only the ammonia contained in the mixed gas can be condensed in the tower space 92 and the condensed ammonia can be moved to the ammonia tank 310 by its own weight. In addition, since only the inert gas can remain in the tower space 92, the inert gas remaining in the tower space 92 can be released to the atmosphere through the atmosphere release line 69.
- the atmospheric release line 69 is connected to the tank tower portion 90, the inert gas can be discharged from above. Therefore, it is possible to prevent BOG generated from the liquid phase of the ammonia tank 310 from being mixed into the gas discharged through the atmosphere release line 69 .
- the pressure detecting section 72 that detects the pressure in the tower space 92 is further provided, and the pressure regulating valve 70 detects that the pressure in the tower space 92 is ammonia based on the detection result of the pressure detecting section 72.
- the valve opening is adjusted so that the pressure range can be maintained in the liquid phase.
- the ammonia detector 73 capable of detecting the concentration of ammonia in the tower space 92 and the cutoff valve 71 capable of opening and closing the atmospheric release line 69 are further provided. Then, based on the detection result of the ammonia detector 73, the shutoff valve 71 shuts off the atmosphere release line 69 when the ammonia concentration is higher than a predetermined upper limit value, and when the ammonia concentration is lower than a predetermined lower limit threshold value. opens the atmosphere release line 69 .
- the concentration of ammonia in the tower space 92 is high, it is possible to suppress the gas containing ammonia from being released into the atmosphere through the atmosphere release line 69 . Further, when the concentration of ammonia is sufficiently low, the inert gas contained in the gas phase inside the casing 75 can be removed by discharging the inert gas into the atmosphere through the atmosphere release line 69. .
- the mixed gas is cooled inside the tank tower section 90 into which the mixed gas of the inert gas and ammonia is introduced to condense only ammonia.
- the inert gas is released into the atmosphere, and the pressure inside the tank tower part 90 is adjusted to a pressure that can maintain the condensed ammonia in the liquid phase when releasing the inert gas into the atmosphere.
- the pressure inside the tank tower part 90 is adjusted to a pressure that can maintain the condensed ammonia in the liquid phase when releasing the inert gas into the atmosphere.
- FIG. 9 is a diagram corresponding to FIG. 8 in the fourth embodiment of the present disclosure.
- the BOG treatment system 460 includes a tank communication line 97, an inert gas separator (mixed gas introduction section) 490, a cooling section 95, an atmosphere release line 69, a pressure control valve 70, A shutoff valve 71 , a pressure detection section 72 and an ammonia detection section 73 are provided.
- the inert gas separator 490 is arranged above the ammonia tank 10 and forms a storage space 492 capable of storing the mixed gas. Like the inert gas separator 280 of the second embodiment, the inert gas separator 490 of this embodiment also has a vertically elongated shape. The volume of storage space 492 in inert gas separator 490 is smaller than the volume of the gas phase in ammonia tank 10 . Further, the inert gas separator 490 of this embodiment has a cylindrical separator main body 493 and end plate parts 494 closing the upper and lower edges of the separator main body 493 . The atmosphere release line 69 of this embodiment is connected to the upper end plate portion 494 of the inert gas separator 490 .
- the tank communication line 97 is a pipe that connects the gas phase of the ammonia tank 310 and the storage space 492 of the inert gas separator 490 .
- One end of the tank communication line 97 of this embodiment is connected to the upper wall 91 of the ammonia tank 310, and the other end of the tank communication line 97 is connected to the lower end plate portion 494 of the inert gas separator 490.
- the tank communication line 97 of this embodiment has a smaller diameter than the horizontal cross-sectional profile of the separator main body 493 of the inert gas separator 490 .
- the atmosphere release line 69, the pressure regulating valve 70, the cutoff valve 71, the pressure detection unit 72, and the ammonia detection unit 73 have the same configurations as in the above-described second embodiment, so a detailed description will be given. omitted.
- the inert gas separator 490 is provided above the ammonia tank 310, and the gas phase of the ammonia tank 310 and the storage space 492 of the inert gas separator 490 are connected by the tank communication line. 97 communicates with each other.
- the mixed gas present in the gas phase of the ammonia tank 310 is led to the storage space 492 of the inert gas separator 490 via the tank communication line 97, and mixed in the storage space 492 of the inert gas separator 490.
- Ammonia contained in the gas can be condensed by the cooling unit 95 .
- the inert gas remaining in the storage space 492 of the inert gas separator 490 without being condensed can be discharged through the atmosphere release line 69 .
- the ammonia condensed in the storage space 492 can be moved by its own weight to the ammonia tank 310 via the tank communication line 97 . Therefore, it is possible to further suppress the ammonia from being discharged through the atmosphere release line 69, so that the inert gas remaining in the gas phase of the ammonia tank 310 can be efficiently removed.
- the mixed gas is cooled inside the inert gas separator 490 into which the mixed gas of the inert gas and ammonia is introduced to remove only ammonia.
- the pressure inside the inert gas separator 490 is set to a pressure that can maintain the condensed ammonia in the liquid phase when releasing the inert gas to the atmosphere. is adjusted to As a result, only the ammonia present in the gas phase inside the inert gas separator 490 can be liquefied, and only the inert gas can remain in the gas phase inside the inert gas separator 490 .
- the floating body of the fifth embodiment is used as a pressure tank, and liquefied ammonia stored in a storage tank, which is another ammonia tank, is used as a coolant of the cooling unit 95. is different from the floating body of the third embodiment only. Therefore, referring to FIG. 1, the same parts as in the above-described third embodiment are denoted by the same reference numerals, and overlapping descriptions are omitted.
- FIG. 10 is a diagram corresponding to FIG. 9 in the fifth embodiment of the present disclosure.
- the floating body 1 of the fifth embodiment includes a floating body body 2, an upper structure 4, a combustion device 8, an ammonia tank 510, a storage tank 101, a fuel supply system 20, A gas supply system 30 , a purge system 40 , an ammonia recovery system 50 and a BOG processing system 560 are provided.
- tanks for storing ammonia an ammonia tank (high pressure tank) 510 that stores ammonia at a pressure higher than the atmospheric pressure, and a storage tank (low pressure tank) that stores ammonia at a lower temperature and pressure than the ammonia tank 510. 101 and .
- the ammonia tank 510 is a so-called pressure tank that can store liquefied ammonia at a pressure higher than the atmospheric pressure and at a higher temperature (for example, normal temperature) than the storage tank 101 .
- Examples of the ammonia tank 510 include service tanks and mixing chambers.
- at least the ammonia tank 510 is configured such that the mixed fluid of the inert gas and ammonia discharged by the purge system 40 of the first embodiment flows through the recovery line 52. ing.
- the storage tank 101 is, for example, a cargo tank or the like, and can be exemplified by a tank that stores liquefied ammonia in a predetermined pressure range close to atmospheric pressure. Such a storage tank 101 is generally covered with a heat insulating material that suppresses heat input from the outside, and the ammonia stored in the storage tank 101 has a temperature (low temperature ). Note that the ammonia tank 10 capable of reliquefying BOG by the BOG treatment system 60 of the first embodiment may be used as the storage tank 101 .
- the BOG processing system 560 of the fifth embodiment includes a tank tower section (mixed gas introduction section) 90, a cooling section 595, an atmosphere release line 69, a pressure regulating valve 70, a cutoff valve 71, and a pressure detection section 72. , and an ammonia detection unit 73 .
- the atmospheric release line 69, the pressure regulating valve 70, the cutoff valve 71, the pressure detecting section 72, and the ammonia detecting section 73 are configured in the same manner as in the third embodiment, so detailed description thereof will be omitted.
- the tank tower portion 90 projects upward from the upper wall 591 of the ammonia tank 510 .
- the tank tower section 90 forms a tower space (storage space) 92 that communicates with the gas phase inside the ammonia tank 10 . That is, the tower space 92 of the tank tower section 90 can store the mixed gas present in the gas phase of the ammonia tank 510 .
- the tank tower portion 90 exemplified in the fifth embodiment has the same configuration as the tank tower portion 90 of the third embodiment. and an end plate portion 94 closing the upper edge of the portion 93 .
- the cooling section 595 cools the mixed gas in the tank tower section 90 to a temperature at which only ammonia in the mixed gas can be condensed.
- the cooling section 595 includes a coolant pump 102 , a coolant supply line 103 , a cooling section main body 104 and a coolant introduction line 105 .
- the refrigerant pump 102 pressure-feeds the low-temperature ammonia stored in the storage tank 101 toward the cooling unit main body 104 .
- the refrigerant supply line 103 is a pipe that guides the low-temperature ammonia discharged from the refrigerant pump 102 .
- the refrigerant supply line 103 supplies the low-temperature ammonia discharged from the refrigerant pump 102 to the cooling unit main body 104 .
- the cooling unit main body 104 is a so-called heat exchanger and is arranged in the tower space 92 .
- the cooling unit main body 104 exchanges heat between the low-temperature ammonia supplied through the refrigerant supply line 103 and the mixed gas in the tower space 92 . Thereby, only the ammonia contained in the mixed gas in the tower space 92 is condensed.
- the refrigerant introduction line 105 supplies ammonia as a refrigerant that has undergone heat exchange with the mixed gas by the cooling unit main body 104 into the ammonia tank 510 .
- the mixed gas in the tower space 92 of the tank tower section 90 can be cooled by using the low-temperature ammonia stored in the storage tank 101 as a coolant, and only ammonia can be condensed. Further, since the ammonia used as the refrigerant can be stored in the liquid phase of the ammonia tank 510, the temperature rise of the liquid phase of the ammonia tank 510 can be suppressed. Therefore, energy can be saved as compared with the case of using the cooling unit 95 having a refrigerating cycle as in the third embodiment.
- FIG. 11 is a diagram corresponding to FIG. 10 in the modification of the fifth embodiment of the present disclosure.
- the BOG treatment system 560 includes the tank tower section 90 having the tower space 92 communicating with the gas phase of the ammonia tank 510, and the cooling section main body 104 is arranged in the tower space 92.
- the cooling unit 595 of the fifth embodiment can also be applied to a configuration including the inert gas separator 490 as in the fourth embodiment.
- the cooling unit main body 104 of the unit 595 may be installed.
- the fifth embodiment can be used. As with the form, it is possible to save energy.
- the present disclosure is not limited to the configurations of the above-described embodiments and modifications, and can be modified in design without departing from the gist thereof.
- the condenser tower section 80, the tank tower section 90, and the inert gas separators 280 and 490 may have any shape as long as they can form the tower spaces 79 and 92 and the storage spaces 279 and 492, respectively. It is not limited to the form and the shape of each modification.
- the case where the casing 75 has the condenser tower portion 80 has been described.
- the space is used as the tower space 79, and the condenser tower section 80 is omitted. good too.
- the closed shutoff valve 71 is opened when the ammonia concentration drops below the lower limit threshold.
- the atmosphere release line 69 of each embodiment and each modification may be provided with a sensor for detecting the flow of inert gas downstream of the cutoff valve 71 .
- the floating body 1 is a ship that can be navigated by the main engine or the like
- the floating body is not limited to a ship as long as it can store ammonia.
- the case of removing the inert gas mixed in the gas phase of the ammonia tank by fuel purging has been described, but the inert gas mixed in the gas phase of the ammonia tank It is not limited to the purge.
- it may be seal gas of a compressor or the like.
- the pressure regulating valve 70 and the cutoff valve 71 provided in the atmosphere release line 69 are automatically controlled based on the detection results of the pressure detection unit 72 and the ammonia detection unit 73.
- an operator may manually operate the pressure regulating valve 70 and the cutoff valve 71 based on the detection results of the pressure detection unit 72 and the ammonia detection unit 73. .
- the floating body 1 consists of a floating body body 2 floating on water, tanks 10, 310, 510 in which ammonia is stored together with an inert gas, and a mixed gas of the inert gas and the ammonia. are introduced from the tanks 10, 310, 510, and the mixed gas introduction ports 75, 80, 80, 75, 80, 80 at a temperature at which only the ammonia in the mixed gas can be condensed.
- An example of the floating body 1 is a ship.
- An example of the floating body main body 2 is a hull.
- inert gases include nitrogen gas.
- the floating body 1 is the floating body 1 of (1), and includes mixed gas delivery lines 61, 63, and 65 for guiding the mixed gas from the inside of the tank to the mixed gas introduction portion, A compressor 64 for compressing the mixed gas guided by the mixed gas delivery lines 61, 63, 65, and the mixed gas introduction for condensing ammonia gas contained in the mixed gas compressed by the compressor 64. and a re-liquefaction line 67 for returning the liquefied ammonia condensed in the condensers 66, 266 to the tank 10.
- the atmospheric release line 69 is connected to the condensers 66, 266 is communicated with the gas phase inside the casing 75 of the .
- the floating body 1 is the floating body 1 of (2), wherein the casing 75 includes a casing main body portion 78 and an upper portion of the casing main body portion 78 that protrudes upward from the inert a condenser tower section 80 forming a storage space 79 capable of storing gas, and the atmospheric release line 69 is connected to the condenser tower section 80 .
- the inert gas can be discharged from the storage space 79 arranged higher in the space inside the casing 75 .
- the floating body 1 is the floating body 1 of (1), and the mixed gas delivery lines 61, 63 for guiding the mixed gas from the inside of the tank 10 to the mixed gas introduction parts 66, 266 , 65, a compressor 64 for compressing the mixed gas introduced by the mixed gas delivery lines 61, 63, 65, and condensing the ammonia gas contained in the mixed gas compressed by the compressor 64.
- a condenser 266, a reliquefaction line 67 for returning the liquefied ammonia condensed in the condenser 266 to the tank 10, and a storage space 279 arranged above the condenser 266 and capable of storing the inert gas are formed.
- the floating body 1 is the floating body 1 of (4), wherein the ammonia liquefied in the inert gas separator 280 is joined to the re-liquefaction line 67.
- a line 85 is provided. This allows the ammonia condensed in the storage space 279 of the inert gas separator 280 to smoothly join the reliquefaction line 67 via the liquefied gas joining line 85 .
- the floating body 1 is the floating body 1 of (3) to (5), wherein the mixed gas in the storage spaces 79 and 279 is cooled to remove the ammonia contained in the mixed gas. is provided with a cooling device 81, 281 for liquefying the As a result, the mixed gas present in the storage spaces 79 and 279 located away from the liquid phase can be cooled, and the ammonia gas contained in the mixed gas can be condensed.
- the floating body 1 is the floating body 1 of (1), wherein the tank 310 protrudes upward from the upper walls 91 and 591 of the tank 310, and the air inside the tank 310 is A tank tower section 90 as the mixed gas introduction section that forms a storage space 92 capable of storing the inert gas communicated with the phase is provided, and the cooling section 95, 595 removes the mixed gas in the storage space 92.
- the cooling and atmosphere release line 69 is connected to the tank tower section 90 .
- the floating body 1 is the floating body 1 of (1), wherein the mixed gas is disposed above the tank 310 and forms a storage space 492 capable of storing the inert gas. Equipped with an inert gas separator 490 as an introduction part, and a tank communication line 97 that communicates the gas phase inside the tank 310 with the storage space 492. and the atmosphere release line 69 is connected to the inert gas separator 490 .
- the mixed gas existing in the gas phase of the ammonia tank is led to the storage space 492 of the inert gas separator 490 via the tank communication line 97, and the mixed gas is stored in the storage space 492 of the inert gas separator 490.
- the floating body 1 is the floating body 1 of (7) or (8), and the tank is a high-pressure tank 510 that stores the ammonia at a pressure higher than atmospheric pressure. , and further includes a low-pressure tank 101 that stores the ammonia at a lower temperature and pressure than the high-pressure tank 510, and the cooling unit 95 cools the mixed gas using the ammonia stored in the low-pressure tank 101 as a coolant. The ammonia obtained by cooling the mixed gas is introduced into the high pressure tank 510 .
- the mixed gas in the storage space 92 of the tank tower portion 90 can be cooled by using the low-temperature ammonia stored in the low-pressure tank 101 as a coolant, and only the ammonia can be condensed. Further, since the ammonia used as the refrigerant can be stored in the liquid phase of the high pressure tank 510, the temperature rise of the liquid phase of the high pressure tank 510 can be suppressed.
- the floating body 1 is any one of (1) to (9), and the pressure inside the mixed gas introduction part 75, 80, 90, 280, 490
- the pressure regulating valve 70 detects the ammonia Adjust the valve opening so that the pressure can be maintained in the liquid phase.
- the internal pressure of the mixed gas introducing portions 75, 80, 90, 280, 490 can be suppressed from decreasing.
- the floating body 1 is the floating body 1 according to any one of (1) to (10), and the gas inside the mixed gas introduction section 75, 80, 90, 280, 490 is An ammonia detection unit 73 capable of detecting the ammonia concentration of the phase, and based on the detection result of the ammonia detection unit 73, when the ammonia concentration is higher than a predetermined upper limit value, while blocking the atmosphere release line 69, and a shutoff valve 71 that opens the atmosphere release line 69 when the ammonia concentration is lower than a predetermined lower limit threshold.
- the concentration of ammonia in the mixed gas introducing portions 75, 80, 90, 280, 490 is high, it is possible to suppress the gas containing ammonia from being released into the atmosphere through the atmosphere release line 69.
- an inert gas discharge method for a floating body 1 in which ammonia is stored together with an inert gas, wherein a mixed gas of the inert gas and the ammonia is introduced.
- the mixed gas is cooled to condense only the ammonia, and the inert gas is released to the atmosphere, and the inert gas is released to the atmosphere.
- the pressure inside the mixed gas introduction part is adjusted to a pressure that can maintain the condensed ammonia in a liquid phase.
- An example of the floating body 1 is a ship.
- inert gases include nitrogen gas.
- the inert gas can be discharged easily.
- Expansion valve 69 ... Atmospheric release line 70... Pressure regulating valve 71... Shutoff valve 72... Pressure detector 73... Ammonia detector 75... Casing 76... Heat exchanging part 77... Cooling space 78... Casing body 79... Tower space 80... Condenser tower 81, 281... Cooling device 82... Condenser communication line 83... Separator body part 84... Head plate part 85... Liquefied gas merging line 90... Tank tower part 91... Upper wall 92... Tower space 93... Tower main body part 94, 494... Head plate part 95... Cooling part 97... Tank communication line 101... Storage tank 102... Refrigerant pump 279, 492... Storage space 280, 490... Inert gas separator 493... Separator body R... Distribution path
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
本願は、2021年12月21日に、日本に出願された特願2021-207357号に基づき優先権を主張し、その内容をここに援用する。
本開示の一態様の浮体によれば、水上に浮かぶ浮体本体と、不活性ガスとともにアンモニアが貯留されたタンクと、前記不活性ガスと前記アンモニアとの混合ガスが導入される混合ガス導入部と、前記混合ガスのうち前記アンモニアのみを凝縮可能な温度で前記混合ガス導入部内の前記混合ガスを冷却する冷却部と、前記混合ガス導入部内の前記不活性ガスを大気開放可能な大気開放ラインと、前記不活性ガスを大気開放する際の前記混合ガス導入部内の圧力を、前記アンモニアを液相に維持可能な圧力に調整する圧力調整弁と、を備える。
《第一実施形態》
(浮体の構成)
図1、図2に示すように、第一実施形態の浮体1は、浮体本体2と、上部構造4と、燃焼装置8と、アンモニアタンク10と、燃料供給系統20と、ガス供給系統30と、パージ系統40と、アンモニア回収系統50と、BOG処理系統60と、を備えている。本実施形態における浮体1として、アンモニアを燃料とする船舶を一例にして説明する。この浮体1の船種は、特定のものに限られない。浮体1の船種としては、液化ガス運搬船、フェリー、RO-RO船、自動車運搬船、客船等を例示できる。
燃料供給系統20は、燃焼装置8とアンモニアタンク10とを接続し、少なくともアンモニアタンク10に貯留されたアンモニアを燃焼装置8へ供給可能に構成されている。
ガス供給系統30は、燃焼装置8の燃料としてのアンモニアが流通する流通経路Rのアンモニアを窒素等の不活性ガス(パージガス)に置き換える、いわゆるパージを行うための不活性ガスを供給する系統である。ガス供給系統30は、不活性ガス供給部34と、不活性ガス供給管35と、不活性ガス供給弁36と、を備えている。不活性ガスとしては、例えば、不活性ガス生成装置(図示せず)により浮体本体2の内部で生成した不活性ガスや、浮体本体2に設けられた不活性ガスタンク(図示せず)に予め貯留した不活性ガスを用いることができる。なお、不活性ガスは、アンモニアに接触した際に化学反応しない気体であればよく、本実施形態では不活性ガスとして窒素を用いている。
不活性ガス供給管35は、不活性ガス供給部34と、流通経路Rとを接続している。より具体的には、不活性ガス供給管35は、不活性ガス供給部34と、燃料としてのアンモニアが流通する流通経路Rのパージ対象領域とを接続している。本実施形態で例示するパージ対象領域は、供給ライン21、リターンライン22、及び、燃焼装置8内に形成される流通経路Rである。本実施形態で例示する不活性ガス供給管35は、パージ対象領域のうち供給ライン21のパージ対象領域に接続されている。
パージ系統40は、供給ライン21、燃焼装置8、及びリターンライン22の流通経路Rに残留するアンモニアをアンモニアタンク10に導く系統である。本実施形態におけるパージ系統40は、パージライン37と、パージ弁38と、を含んでいる。
BOG処理系統60は、不活性ガスとアンモニアとの混合ガスを処理する系統である。本実施形態における混合ガスは、アンモニアタンク10の気相に存在する気体であって、主に、アンモニアタンク10内の液化アンモニアが気化することによって生じるBOG(Boil Off Gas)と、アンモニア回収系統50から流入する混合流体の気体とを含んでいる。以下、アンモニアタンク10の気相に存在するアンモニアガスと不活性ガスとが混合された気体を単に混合ガスと称する。
ミストセパレータ62は、第一処理ライン61に導入された混合ガスから液滴を除去する。ミストセパレータ62によって液滴を除去された混合ガスは、実質的に気体のみとなっている。ミストセパレータ62により除去された液滴は、図示しない配管を介して、液化アンモニアが貯留されているアンモニアタンク10等のタンクに戻される。なお、第一処理ライン61を流れる混合ガスに液滴が含まれない場合など、ミストセパレータ62を必要としない場合には、ミストセパレータ62を省略してもよい。
圧縮機64は、第二処理ライン63により導入された混合ガスを圧縮する。この圧縮機64により圧縮された混合ガスは、温度上昇して高温高圧の混合ガスとなる。本実施形態の圧縮機64としては、燃焼装置8(主機)とは異なるエンジン等に用いられる圧縮機又は再液化装置のガス圧縮機を例示できる。
凝縮器66は、圧縮機64によって圧縮された高圧の混合ガスを冷却してアンモニアのみを凝縮させる。言い換えれば、混合ガスのうち不活性ガスを凝縮させずにアンモニアガスのみを凝縮(液化)させる。凝縮器66は、ケーシング(混合ガス導入部)75と、熱交換部(冷却部)76と、を備えている。ケーシング75は、第一処理ライン61から導入された混合ガスを冷却する冷却空間77を区画している。ケーシング75には、再液化ライン67が接続されている。
本実施形態の凝縮器66は、一例として、ケーシング75内の圧力を23bar(以下、単に高圧時と称する)とした状態で混合ガスを冷却してアンモニアを凝縮させている。そして、圧力調整弁70は、一例として、大気開放ライン69を介して不活性ガスを大気へ放出する際に、ケーシング75内の圧力が21bar(以下、単に低圧時と称する)よりも下がらないように弁開度を調整している。これにより、不活性ガスを大気開放する際には、高圧時の比エンタルピーを低下させる幅(図3中、過冷却の幅)を最小限にすることができ、低圧時には、液化されたアンモニアが再度気化されないため、不活性ガスのみを大気開放することが可能となる。
膨張弁68は、凝縮器66により凝縮されたアンモニアを減圧することで、当該アンモニアを断熱膨張させて温度低下させる。この温度低下された液体のアンモニアは、再液化ライン67を介してアンモニアタンク10内に戻される。なお、上述した圧縮機64、凝縮器66、膨張弁68により、BOGを再液化させる再液化装置が構成されている。
上記の第一実施形態によれば、不活性ガスとアンモニアとの混合ガスが導入される凝縮器66と、混合ガスのうちアンモニアのみを凝縮可能な温度で凝縮器66のケーシング75の混合ガスを冷却する熱交換部76と、凝縮器66のケーシング75内の不活性ガスを大気開放可能な大気開放ライン69と、不活性ガスを大気開放する際のケーシング75内の圧力を、アンモニアを液相に維持可能な圧力に調整する圧力調整弁70と、を備えている。
このように構成することで、凝縮器66のケーシング75内の気相に存在するアンモニアのみを液化させて不活性ガスのみをケーシング75内の気相に残存させることができる。そして、この気相に残存させた不活性ガスを、大気開放ライン69を介して大気中へ放出することができるため、アンモニアタンク10の気相に含まれる不活性ガスのみを除去することができる。
したがって、作業員の熟練を要することなく、アンモニアタンク10の気相に存在する不活性ガスを容易に排出することが可能になる。そして、不活性ガスを排出することで、BOGの再液化効率や、BOGを燃料とした場合の熱量低下を抑制することができる。
これにより、ケーシング75内の空間のうち、より上方に配置されるタワー空間79から不活性ガスを排出することが可能となる。
したがって、大気開放ライン69を介して排出される気体に、凝縮されたアンモニアが混入することを抑制できる。
これにより、大気開放ライン69を介して不活性ガスを大気中へ放出する場合に、ケーシング75の内部圧力が低下して、凝縮したアンモニアが気化したり、アンモニアが冷却されても凝縮しなかったりすることを抑制できる。
これにより、タワー空間79のアンモニア濃度が高い場合に、大気開放ライン69を介して大気中へアンモニアを含む気体が放出されることを抑制できる。また、アンモニア濃度が十分に低い場合には、大気開放ライン69を介して不活性ガスを大気中へ放出することで、ケーシング75の内部の気相に含まれる不活性ガスを除去することができる。
これにより、凝縮器66のケーシング75内の気相に存在するアンモニアのみを液化させて不活性ガスのみをケーシング75内の気相に残存させることができる。そして、この気相に残存させた不活性ガスを、大気中へ放出することができるため、混合ガスに含まれる不活性ガスのみを除去することができる。
したがって、作業員の熟練を要することなく、混合ガスから不活性ガスを分離して、不活性ガスを大気中に容易に排出することが可能になる。
図4は、本開示の第一実施形態の変形例におけるBOG処理系統の構成を示す図である。
上述した第一実施形態では、ケーシング本体部78の内部に設けられた熱交換部76によって気相の混合ガスを冷却してアンモニアを凝縮させる場合について説明した。しかし、この構成に限られない。図4に示す第一実施形態の変形例のように、例えば、タワー空間79の気体を冷却する冷却装置81を、熱交換部76とは別に設けるようにしてもよい。
この第一実施形態の変形例のように構成することで、アンモニアタンク10内の液相から上方に離れたタワー空間79に存在する混合ガスを冷却して、当該気体に含まれているアンモニアガスを凝縮させて自重によりタワー空間79よりも下方へ移動させることができる。
したがって、大気開放ライン69から大気中に放出される気体に含まれるアンモニアを、より一層低減することができる。
次に、本開示の第二実施形態の浮体を図面に基づき説明する。この第二実施形態の浮体は、凝縮器の上方の離れた位置に不活性ガス分離器を備えている点でのみ相違する。そのため、図1を援用し、上述した第一実施形態と同一部分に同一符号を付して説明すると共に、重複する説明を省略する。
図5は、本開示の第二実施形態におけるBOG処理系統の構成を示す図である。
図1、図5に示すように、第二実施形態の浮体は、浮体本体2と、上部構造4と、燃焼装置8と、アンモニアタンク10と、燃料供給系統20と、ガス供給系統30と、パージ系統40と、アンモニア回収系統50と、BOG処理系統260と、を備えている。
第二実施形態によれば、凝縮器266の上方の離れた位置に不活性ガス分離器280を備え、凝縮器266のケーシング75内の気相と不活性ガス分離器280の貯め空間279とを凝縮器連通ライン82により連通させている。
これにより、凝縮器266のケーシング75内の気相で凝縮されなかった不活性ガスを、凝縮器連通ライン82を介して不活性ガス分離器280の貯め空間279へ導き、この不活性ガス分離器280の貯め空間279から大気開放ライン69を介して大気中へ放出することが可能となる。また、凝縮されていないアンモニアが不活性ガスと共に不活性ガス分離器280の貯め空間279に流入した場合であっても、凝縮器266で冷却された不活性ガスにより不活性ガス分離器280の貯め空間279でもアンモニアを凝縮させることができる。そして、貯め空間279で凝縮したアンモニアは、凝縮器連通ライン82を介して凝縮器266のケーシング75内に自重により移動させることができる。
したがって、凝縮器266と大気開放ライン69とを離間させて、大気開放ライン69を介してアンモニアが排出されることをより一層抑制できるため、アンモニアタンク10の気相に残存する不活性ガスを効率よく除去することができる。
これにより、不活性ガス分離器280内の気相に存在するアンモニアのみを液化させて不活性ガスのみを不活性ガス分離器280内の気相に残存させることができる。そして、この気相に残存させた不活性ガスを、大気中へ放出することができるため、混合ガスに含まれる不活性ガスのみを除去することができる。
したがって、作業員の熟練を要することなく、混合ガスから不活性ガスを分離して、不活性ガスを大気中に容易に排出することが可能になる。
図6は、本開示の第二実施形態の第一変形例における不活性ガス分離器及び冷却装置を示す図である。
上述した第二実施形態では、ケーシング75の冷却空間77に設けられた熱交換部76によって混合ガスを冷却してアンモニアを凝縮させる場合について説明したが、この構成に限られない。図6に示す第二実施形態の第一変形例のように、例えば、不活性ガス分離器280の貯め空間279の混合ガスを冷却する冷却装置281を、凝縮器266の熱交換部76とは別に設けるようにしてもよい。この冷却装置281は、凝縮器266の熱交換部76と同等の温度で混合ガスを冷却する。
この第二実施形態の第一変形例のように構成することで、不活性ガス分離器280の貯め空間279に存在する気体を積極的に冷却して、当該気体に含まれているアンモニアガスを凝縮させて自重により凝縮器連通ライン82を介して凝縮器266のケーシング75内へ移動させることができる。
したがって、大気開放ライン69から大気中に放出される気体に含まれるアンモニアを、より一層低減することができる。
図7は、本開示の第二実施形態の第二変形例におけるBOG処理系統の構成を示す図である。
上述した第二実施形態では、不活性ガス分離器280の貯め空間279で凝縮したアンモニアが凝縮器連通ライン82を介して凝縮器266のケーシング75内へ移動する場合について説明した。しかし、この構成に限られるものではない。例えば、図7に示す第二実施形態の第二変形例のように、凝縮器連通ライン82とは別に、不活性ガス分離器280の貯め空間279で凝縮したアンモニアを、再液化ライン67に合流させる液化ガス合流ライン85を設けるようにしてもよい。この第二実施形態の第二変形例では、凝縮器連通ライン82の両端部のうち、不活性ガス分離器280に接続される端部は、不活性ガス分離器280の分離器本体部83の下部に接続されている。さらに、液化ガス合流ライン85の上端は、不活性ガス分離器280の下部の鏡板部84に接続されており、液化ガス合流ライン85の下端は、再液化ライン67に合流接続されている。なお、この第二変形例においても第一変形例と同様に冷却装置281を備えていてもよい。
次に、本開示の第三実施形態を図面に基づき説明する。この第三実施形態の浮体は、上述した第一実施形態の変形例の凝縮器66に設けていた凝縮器タワー部80と同様の構成をアンモニアタンク10に設けたものである。そのため、この第三実施形態では、図1を援用し、上述した第一実施形態の変形例と同一部分に同一符号を付して説明すると共に、重複する説明を省略する。
図1、図8に示すように、第三実施形態における浮体1は、浮体本体2と、上部構造4と、燃焼装置8と、アンモニアタンク310と、燃料供給系統20と、ガス供給系統30と、パージ系統40と、アンモニア回収系統50と、BOG処理系統360と、を備えている。すなわち、この第三実施形態のアンモニアタンク310の気相には、第一実施形態と同様に、不活性ガスが流入する構成となっている。
図8に示すように、BOG処理系統360は、タンクタワー部(混合ガス導入部)90と、冷却部95と、大気開放ライン69と、圧力調整弁70と、遮断弁71と、圧力検出部72と、アンモニア検出部73と、を備えている。
第三実施形態の浮体によれば、アンモニアタンク310の内部の気相の混合ガスをタンクタワー部90のタワー空間92に導入させて、タワー空間92の混合ガスを冷却部95で冷却することができる。そのため、混合ガスに含まれるアンモニアのみをタワー空間92で凝縮させて、この凝縮させたアンモニアを、自重によりアンモニアタンク310へ移動させることができる。また、タワー空間92には、不活性ガスのみを残存させることができるため、このタワー空間92に残存している不活性ガスを、大気開放ライン69を介して大気中へ放出することができる。
したがって、作業員の熟練を要することなく、アンモニアタンク310の気相に存在する不活性ガスを容易に排出することが可能になる。そして、アンモニアタンク310の気相から不活性ガスを排出することで、BOGの再液化効率や、BOGを燃料とした場合の熱量低下を抑制することができる。
これにより、大気開放ライン69を介して不活性ガスを大気中へ放出する場合に、タワー空間92の圧力が低下して、凝縮したアンモニアが気化したり、アンモニアが冷却されても凝縮しなかったりすることを抑制できる。
これにより、タワー空間92のアンモニア濃度が高い場合に、大気開放ライン69を介して大気中へアンモニアを含む気体が放出されることを抑制できる。また、アンモニア濃度が十分に低い場合には、大気開放ライン69を介して不活性ガスを大気中へ放出することで、ケーシング75の内部の気相に含まれる不活性ガスを除去することができる。
これにより、タンクタワー部90内の気相に存在するアンモニアのみを液化させて不活性ガスのみをタンクタワー部90内の気相に残存させることができる。そして、この気相に残存させた不活性ガスを、大気中へ放出することができるため、混合ガスに含まれる不活性ガスのみを除去することができる。
したがって、作業員の熟練を要することなく、混合ガスから不活性ガスを分離して、不活性ガスを大気中に容易に排出することが可能になる。
次に、本開示の第四実施形態の浮体を図面に基づき説明する。この第四実施形態の浮体は、第三実施形態のタンクタワー部に代えてアンモニアタンクの上方の離れた位置に不活性ガス分離器を備えている点でのみ相違する。そのため、上述した第三実施形態と同一部分に同一符号を付して説明すると共に、重複する説明を省略する。
図9に示すように、BOG処理系統460は、タンク連通ライン97と、不活性ガス分離器(混合ガス導入部)490と、冷却部95と、大気開放ライン69と、圧力調整弁70と、遮断弁71と、圧力検出部72と、アンモニア検出部73と、を備えている。
上記第四実施形態によれば、アンモニアタンク310の上方の離れた位置に不活性ガス分離器490を備え、アンモニアタンク310の気相と不活性ガス分離器490の貯め空間492とをタンク連通ライン97により連通させている。
これにより、アンモニアタンク310の気相に存在する混合ガスを、タンク連通ライン97を介して不活性ガス分離器490の貯め空間492へ導き、この不活性ガス分離器490の貯め空間492で、混合ガスに含まれるアンモニアを冷却部95によって凝縮させることができる。そのため、不活性ガス分離器490の貯め空間492に凝縮せずに残った不活性ガスのみを大気開放ライン69を介して排出することが可能となる。また、貯め空間492で凝縮したアンモニアは、タンク連通ライン97を介してアンモニアタンク310に自重により移動させることができる。
したがって、大気開放ライン69を介してアンモニアが排出されることをより一層抑制できるため、アンモニアタンク310の気相に残存する不活性ガスを効率よく除去することができる。
これにより、不活性ガス分離器490内の気相に存在するアンモニアのみを液化させて不活性ガスのみを不活性ガス分離器490内の気相に残存させることができる。そして、この気相に残存させた不活性ガスを、大気中へ放出することができるため、混合ガスに含まれる不活性ガスのみを除去することができる。
したがって、作業員の熟練を要することなく、混合ガスから不活性ガスを分離して、不活性ガスを大気中に容易に排出することが可能になる。
次に、本開示の第五実施形態の浮体を図面に基づき説明する。この第五実施形態の浮体では、上述した第三実施形態のアンモニアタンクを圧力タンクとし、更に、他のアンモニアタンクであるストレージタンクに貯留されている液化アンモニアを、冷却部95の冷媒として用いる点でのみ第三実施形態の浮体と相違している。そのため、図1を援用し、上述した第三実施形態と同一部分に同一符号を付して説明すると共に、重複する説明を省略する。
図10は、本開示の第五実施形態における図9に相当する図である。
図1、図10に示すように、第五実施形態の浮体1は、浮体本体2と、上部構造4と、燃焼装置8と、アンモニアタンク510と、ストレージタンク101と、燃料供給系統20と、ガス供給系統30と、パージ系統40と、アンモニア回収系統50と、BOG処理系統560と、を備えている。この第五実施形態では、アンモニアを貯留するタンクとして、大気圧よりも高い圧力で貯留するアンモニアタンク(高圧タンク)510と、アンモニアタンク510よりも低温低圧でアンモニアを貯留するストレージタンク(低圧タンク)101と、を備えている。
第五実施形態のBOG処理系統560は、タンクタワー部(混合ガス導入部)90と、冷却部595と、大気開放ライン69と、圧力調整弁70と、遮断弁71と、圧力検出部72と、アンモニア検出部73と、を備えている。なお、大気開放ライン69と、圧力調整弁70と、遮断弁71と、圧力検出部72と、アンモニア検出部73とは、第三実施形態と同様の構成であるため、詳細説明を省略する。
冷媒供給ライン103は、冷媒ポンプ102から吐出された低温のアンモニアを導く配管である。冷媒供給ライン103は、冷媒ポンプ102から吐出された低温のアンモニアを、冷却部本体104へ供給する。
冷媒導入ライン105は、冷却部本体104により混合ガスと熱交換した冷媒としてのアンモニアを、アンモニアタンク510内に供給する。
上記第五実施形態によれば、ストレージタンク101に貯留された低温のアンモニアを冷媒としてタンクタワー部90のタワー空間92の混合ガスを冷却してアンモニアのみを凝縮させることができる。また、冷媒として使用したアンモニアを、アンモニアタンク510の液相に貯留することができるため、アンモニアタンク510の液相の温度上昇を抑制することもできる。
したがって、第三実施形態のように冷凍サイクルを有した冷却部95等を用いる場合と比較して、省エネルギー化を図ることができる。
図11は、本開示の第五実施形態の変形例における図10に相当する図である。
上述した第五実施形態では、BOG処理系統560が、アンモニアタンク510の気相と連通するタワー空間92を有したタンクタワー部90を備え、冷却部本体104がタワー空間92に配置される場合を一例にして説明した。しかし、第五実施形態の冷却部595は、第四実施形態のように不活性ガス分離器490を備えた構成にも適用可能である。具体的には、図11に示す第五実施形態の変形例のBOG処理系統660のように、アンモニアタンク510の上方の離れた位置に設けられた不活性ガス分離器490の貯め空間492に冷却部595の冷却部本体104を設置すればよい。
この第五実施形態の変形例のように構成することで、タンクタワー部90に代えてアンモニアタンク510の上方の離れた位置に不活性ガス分離器490を備える場合であっても、第五実施形態と同様に、省エネルギー化を図ることが可能となる。
本開示は上述した各実施形態及び各変形例の構成に限られるものではなく、その要旨を逸脱しない範囲で設計変更可能である。
例えば、凝縮器タワー部80、タンクタワー部90、不活性ガス分離器280,490の形状は、タワー空間79,92、貯め空間279,492をそれぞれ形成可能な形状であれば良く上述した各実施形態及び各変形例の形状に限られない。
さらに、各実施形態及び各変形例の大気開放ライン69には、遮断弁71の下流側に不活性ガスの流れを検知するセンサーを設けるようにしてもよい。
さらに、上記各実施形態及び各変形例においては、燃料パージによりアンモニアタンクの気相に混入した不活性ガスを除去する場合について説明したが、アンモニアタンクの気相に混入する不活性ガスは、燃料パージによるものに限られない。例えば、圧縮機のシールガス等であってもよい。
実施形態に記載の浮体は、例えば以下のように把握される。
浮体1の例としては、船舶が挙げられる。浮体本体2の例としては、船体が挙げられる。不活性ガスの例としては、窒素ガスが挙げられる。
これにより、混合ガス送出ライン61と、圧縮機64と、凝縮器66と、再液化ライン67とを具備したいわゆる再液化装置を備えた浮体1において、凝縮器66によりアンモニアのみを凝縮させて不活性ガスをケーシング75内の気相に残存させて、大気開放ライン69を介して不活性ガスを大気へ放出することができる。
これにより、ケーシング75内の空間のうち、より上方に配置される貯め空間79から不活性ガスを排出することが可能となる。
これにより、凝縮器66のケーシング75内の気相で凝縮されずに残存する不活性ガスを、凝縮器連通ライン82を介して不活性ガス分離器280の貯め空間279へ導き、不活性ガス分離器280の貯め空間279から大気開放ライン69を介して不活性ガスを排出することが可能となる。
これにより、不活性ガス分離器280の貯め空間279で凝縮されたアンモニアを、液化ガス合流ライン85を介して円滑に再液化ライン67に合流させることができる。
これにより、液相から離れた位置の貯め空間79,279に存在する混合ガスを冷却して、当該混合ガスに含まれているアンモニアガスを凝縮させることができる。
これにより、混合ガスに含まれるアンモニアのみをタワー空間92で凝縮させて、この凝縮させたアンモニアを、自重によりアンモニアタンク310へ移動させることができる。また、タワー空間92には、不活性ガスのみを残存させることができるため、このタワー空間92に残存している不活性ガスを、大気開放ライン69を介して大気へ放出することができる。
これにより、アンモニアタンクの気相に存在する混合ガスを、タンク連通ライン97を介して不活性ガス分離器490の貯め空間492へ導き、この不活性ガス分離器490の貯め空間492で、混合ガスに含まれるアンモニアを冷却部95,595によって凝縮させることができる。そのため、不活性ガス分離器490の貯め空間492に凝縮せずに残った不活性ガスのみを大気開放ライン69を介して排出することが可能となる。さらに、貯め空間492で凝縮したアンモニアは、タンク連通ライン97を介してタンク310に自重により移動させることができる。
これにより、低圧タンク101に貯留された低温のアンモニアを冷媒としてタンクタワー部90の貯め空間92の混合ガスを冷却してアンモニアのみを凝縮させることができる。また、冷媒として使用したアンモニアを、高圧タンク510の液相に貯留することができるため、高圧タンク510の液相の温度上昇を抑制することができる。
これにより、大気開放ライン69を介して不活性ガスを大気中へ放出する場合に、混合ガス導入部75,80,90,280,490の内部圧力が低下することを抑制できる。
これにより、混合ガス導入部75,80,90,280,490内のアンモニア濃度が高い場合に、大気開放ライン69を介して大気中へアンモニアを含む気体が放出されることを抑制できる。
浮体1の例としては、船舶が挙げられる。不活性ガスの例としては、窒素ガスが挙げられる。
Claims (12)
- 水上に浮かぶ浮体本体と、
不活性ガスとともにアンモニアが貯留されたタンクと、
前記不活性ガスと前記アンモニアとの混合ガスが導入される混合ガス導入部と、
前記混合ガスのうち前記アンモニアのみを凝縮可能な温度で前記混合ガス導入部内の前記混合ガスを冷却する冷却部と、
前記混合ガス導入部内の前記不活性ガスを大気開放可能な大気開放ラインと、
前記不活性ガスを大気開放する際の前記混合ガス導入部内の圧力を、前記アンモニアを液相に維持可能な圧力に調整する圧力調整弁と、
を備える浮体。 - 前記タンク内から前記混合ガス導入部へ前記混合ガスを導く混合ガス送出ラインと、
前記混合ガス送出ラインにより導かれた前記混合ガスを圧縮する圧縮機と、
前記圧縮機で圧縮された前記混合ガスに含まれているアンモニアガスを凝縮する前記混合ガス導入部としての凝縮器と、
前記凝縮器で凝縮された液化アンモニアを前記タンクに戻す再液化ラインと、
を備え、
前記大気開放ラインは、前記凝縮器のケーシングの内部の気相と連通されている
請求項1に記載の浮体。 - 前記ケーシングは、
ケーシング本体部と、前記ケーシング本体部の上部から上方に突出して前記不活性ガスを貯留可能な貯め空間を形成する凝縮器タワー部と、を備え、
前記大気開放ラインは、前記凝縮器タワー部に接続されている
請求項2に記載の浮体。 - 前記タンク内から前記混合ガス導入部へ前記混合ガスを導く混合ガス送出ラインと、
前記混合ガス送出ラインにより導かれた前記混合ガスを圧縮する圧縮機と、
前記圧縮機で圧縮された前記混合ガスに含まれているアンモニアガスを凝縮する凝縮器と、
前記凝縮器で凝縮された液化アンモニアを前記タンクに戻す再液化ラインと、
前記凝縮器の上方に配置されて前記不活性ガスを貯留可能な貯め空間を形成する前記混合ガス導入部としての不活性ガス分離器と、
前記凝縮器のケーシング内の気相と前記貯め空間とを連通する凝縮器連通ラインと、
を備える
請求項1に記載の浮体。 - 前記不活性ガス分離器で液化された前記アンモニアを、前記再液化ラインへ合流させる液化ガス合流ラインを備える
請求項4に記載の浮体。 - 前記貯め空間の前記混合ガスを冷却して前記混合ガスに含まれる前記アンモニアを液化させる冷却装置を備える
請求項3から5の何れか一項に記載の浮体。 - 前記タンクは、前記タンクの上壁から上方に突出し、前記タンクの内部の気相と連通された前記不活性ガスを貯留可能な貯め空間を形成する前記混合ガス導入部としてのタンクタワー部を備え、
前記冷却部は、前記貯め空間の前記混合ガスを冷却し、
前記大気開放ラインは、前記タンクタワー部に接続されている
請求項1に記載の浮体。 - 前記タンクの上方に配置されて前記不活性ガスを貯留可能な貯め空間を形成する前記混合ガス導入部としての不活性ガス分離器と、
前記タンクの内部の気相と前記貯め空間とを連通するタンク連通ラインと、
を備え、
前記冷却部は、前記貯め空間の前記混合ガスを冷却し、
前記大気開放ラインは、前記不活性ガス分離器に接続されている
請求項1に記載の浮体。 - 前記タンクは、大気圧よりも高い圧力で前記アンモニアを貯留する高圧タンクであって、
前記高圧タンクよりも低温低圧で前記アンモニアを貯留する低圧タンクをさらに備え、
前記冷却部は、
前記低圧タンクに貯留された前記アンモニアを冷媒として前記混合ガスを冷却するとともに、前記混合ガスを冷却した前記アンモニアを前記高圧タンクに導入する
請求項7又は8に記載の浮体。 - 前記混合ガス導入部の内部の圧力を検出する圧力検出部を備え、
前記圧力調整弁は、前記圧力検出部の検出結果に基づいて、前記混合ガス導入部の内部の圧力が前記アンモニアを液相に維持可能な圧力範囲となるように弁開度を調整する
請求項1から5の何れか一項に記載の浮体。 - 前記混合ガス導入部の内部の気相のアンモニア濃度を検出可能なアンモニア検出部と、
前記アンモニア検出部の検出結果に基づいて、前記アンモニア濃度が所定の上限値よりも高い場合に前記大気開放ラインを遮断する一方で、前記アンモニア濃度が所定の下限閾値よりも低い場合に前記大気開放ラインを開放する遮断弁と、
を備える
請求項1から5の何れか一項に記載の浮体。 - 不活性ガスと共にアンモニアが貯留される浮体の不活性ガス排出方法であって、
前記不活性ガスと前記アンモニアとの混合ガスが導入される混合ガス導入部の内部で、前記混合ガスを冷却して前記アンモニアのみを凝縮させ、前記不活性ガスを大気中に放出すると共に、
前記不活性ガスを大気中に放出する際に、前記混合ガス導入部の内部の圧力を、前記凝縮させた前記アンモニアを液相に維持可能な圧力に調整する浮体の不活性ガス排出方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22910749.5A EP4434871A4 (en) | 2021-12-21 | 2022-11-25 | FLOATING BODY AND METHOD FOR EVACUATING INERT GAS FROM A FLOATING BODY |
| CN202280083412.9A CN118401433A (zh) | 2021-12-21 | 2022-11-25 | 浮体及浮体的非活性气体排放方法 |
| KR1020247020060A KR20240107332A (ko) | 2021-12-21 | 2022-11-25 | 부체 및 부체의 불활성 가스 배출 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-207357 | 2021-12-21 | ||
| JP2021207357A JP2023092231A (ja) | 2021-12-21 | 2021-12-21 | 浮体及び浮体の不活性ガス排出方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023120031A1 true WO2023120031A1 (ja) | 2023-06-29 |
Family
ID=86902342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2022/043530 Ceased WO2023120031A1 (ja) | 2021-12-21 | 2022-11-25 | 浮体及び浮体の不活性ガス排出方法 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4434871A4 (ja) |
| JP (1) | JP2023092231A (ja) |
| KR (1) | KR20240107332A (ja) |
| CN (1) | CN118401433A (ja) |
| WO (1) | WO2023120031A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4269779A4 (en) * | 2020-12-28 | 2024-06-19 | Dalian Shipbuilding Industry Co. Ltd | Marine liquid ammonia fuel supply and fuel recycling system |
| WO2025190761A1 (en) * | 2024-03-13 | 2025-09-18 | Lge Ip Management Company Ltd | Method and system for recovering fuel from an engine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025034068A1 (ko) | 2023-08-10 | 2025-02-13 | 주식회사 엘지에너지솔루션 | 전고체 전지용 양극 및 이를 포함하는 전고체 전지 |
| WO2025253864A1 (ja) * | 2024-06-04 | 2025-12-11 | 株式会社Ihi | 回収装置 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017149718A1 (ja) | 2016-03-03 | 2017-09-08 | 日揮株式会社 | アンモニアの製造方法 |
| KR20200049933A (ko) * | 2018-10-29 | 2020-05-11 | 삼성중공업 주식회사 | 부유식 플랫폼 |
| JP6859475B1 (ja) * | 2020-08-06 | 2021-04-14 | 三菱造船株式会社 | 船舶 |
| CN112696289A (zh) * | 2020-12-28 | 2021-04-23 | 大连船舶重工集团有限公司 | 一种船用液氨燃料供给及燃料回收利用系统 |
| CN113719385A (zh) * | 2021-09-09 | 2021-11-30 | 大连船舶重工集团有限公司 | 一种船用管线液氨回收系统 |
| WO2022249799A1 (ja) * | 2021-05-24 | 2022-12-01 | 三菱造船株式会社 | 船舶 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060156758A1 (en) * | 2005-01-18 | 2006-07-20 | Hyung-Su An | Operating system of liquefied natural gas ship for sub-cooling and liquefying boil-off gas |
| KR100638925B1 (ko) * | 2005-01-18 | 2006-10-26 | 대우조선해양 주식회사 | 엘엔지선의 증발가스 과냉액화 운전시스템 |
| CN103459912B (zh) * | 2011-02-28 | 2015-04-08 | 韩国科学技术院 | Lng注入系统及蒸发气体处理方法 |
| KR102082362B1 (ko) * | 2013-09-27 | 2020-02-27 | 익셀러레이트 에너지 리미티드 파트너쉽 | 극저온 저장 선박에 있는 보일 오프 가스 속의 잠열의 수집, 이용, 배출을 위한 장치, 시스템, 방법 |
| JP6694645B2 (ja) * | 2016-03-01 | 2020-05-20 | 国立研究開発法人産業技術総合研究所 | 塩基性ガス吸収剤及び塩基性ガス分離回収方法 |
| KR102265257B1 (ko) * | 2016-03-07 | 2021-06-16 | 현대중공업 주식회사 | 증발가스 재액화 시스템 및 선박 |
| KR102377799B1 (ko) * | 2020-02-17 | 2022-03-23 | 한국조선해양 주식회사 | 가스 처리 시스템 및 이를 포함하는 선박 |
| KR102776645B1 (ko) * | 2020-05-07 | 2025-03-10 | 삼성중공업 주식회사 | 암모니아 연료 공급 장치 |
| KR102755885B1 (ko) * | 2020-05-22 | 2025-01-20 | 한화오션 주식회사 | 선박용 연료 공급 시스템 |
| JP6934555B1 (ja) * | 2020-08-25 | 2021-09-15 | 三菱造船株式会社 | 船舶 |
-
2021
- 2021-12-21 JP JP2021207357A patent/JP2023092231A/ja active Pending
-
2022
- 2022-11-25 KR KR1020247020060A patent/KR20240107332A/ko active Pending
- 2022-11-25 WO PCT/JP2022/043530 patent/WO2023120031A1/ja not_active Ceased
- 2022-11-25 CN CN202280083412.9A patent/CN118401433A/zh active Pending
- 2022-11-25 EP EP22910749.5A patent/EP4434871A4/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017149718A1 (ja) | 2016-03-03 | 2017-09-08 | 日揮株式会社 | アンモニアの製造方法 |
| KR20200049933A (ko) * | 2018-10-29 | 2020-05-11 | 삼성중공업 주식회사 | 부유식 플랫폼 |
| JP6859475B1 (ja) * | 2020-08-06 | 2021-04-14 | 三菱造船株式会社 | 船舶 |
| CN112696289A (zh) * | 2020-12-28 | 2021-04-23 | 大连船舶重工集团有限公司 | 一种船用液氨燃料供给及燃料回收利用系统 |
| WO2022249799A1 (ja) * | 2021-05-24 | 2022-12-01 | 三菱造船株式会社 | 船舶 |
| CN113719385A (zh) * | 2021-09-09 | 2021-11-30 | 大连船舶重工集团有限公司 | 一种船用管线液氨回收系统 |
Non-Patent Citations (2)
| Title |
|---|
| .: " MAN B&W Ammonia fueld engine development status", MAN ENERGY SOLUTIONS, MAN ENERGY SOLUTIONS, 24 June 2021 (2021-06-24), pages 1 - 23, XP093073771, Retrieved from the Internet <URL:https://www.maritimes-zentrum.de/fileadmin/data/contentgrafiken/Aufgaben_und_Aktivitaeten/Weiterbildung_und_Veranstaltungen/ISF_Tagung/2021/Vortraege/Bidstrup_MAN_Ammonia_fueled_engine_development.pdf> [retrieved on 20230815] * |
| See also references of EP4434871A4 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4269779A4 (en) * | 2020-12-28 | 2024-06-19 | Dalian Shipbuilding Industry Co. Ltd | Marine liquid ammonia fuel supply and fuel recycling system |
| WO2025190761A1 (en) * | 2024-03-13 | 2025-09-18 | Lge Ip Management Company Ltd | Method and system for recovering fuel from an engine |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240107332A (ko) | 2024-07-09 |
| EP4434871A4 (en) | 2025-09-03 |
| JP2023092231A (ja) | 2023-07-03 |
| EP4434871A1 (en) | 2024-09-25 |
| CN118401433A (zh) | 2024-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2023120031A1 (ja) | 浮体及び浮体の不活性ガス排出方法 | |
| KR102474922B1 (ko) | 가스 처리 시스템 및 이를 포함하는 선박 | |
| JP7357670B2 (ja) | ガス処理システム及びこれを含む船舶 | |
| EP4353584A1 (en) | Ship | |
| KR102649335B1 (ko) | 가스 처리 시스템 및 이를 포함하는 선박 | |
| JP7684322B2 (ja) | ガス処理システム及びそれを含む船舶 | |
| KR101941314B1 (ko) | 액화가스 처리 시스템 | |
| KR100912169B1 (ko) | 응축액 순환장치 및 순환방법 | |
| KR20100137758A (ko) | 선박용 이산화탄소 이송탱크의 증발기체 배출장치 | |
| KR20180049929A (ko) | 액화가스 급유선 | |
| KR102712750B1 (ko) | 선박의 암모니아 연료공급시스템 | |
| KR102018745B1 (ko) | 외기독립추진 시스템이 탑재된 잠수함 | |
| KR20250170674A (ko) | 선박, 선박의 이산화 탄소 하역 방법 | |
| KR20230165989A (ko) | 선박의 암모니아 연료공급시스템 | |
| Wieczorek | The Problem of Carrying Insufficiently Optimal Gassing-up Operation after Tanks Inerting with Reference to Ethylene Carriers | |
| KR102808422B1 (ko) | 선박의 연료전지용 암모니아 연료 공급 시스템 | |
| JP2004100862A (ja) | 液化co2貯蔵装置 | |
| KR102705010B1 (ko) | 선박의 암모니아 연료공급시스템 | |
| KR102705014B1 (ko) | 선박의 암모니아 연료공급시스템 | |
| KR102869447B1 (ko) | 선박용 엔진의 연소용 공기 냉각 시스템 및 방법 | |
| WO2024018768A1 (ja) | 浮体 | |
| KR20250071790A (ko) | 연료 처리 시스템 및 이를 포함하는 선박 | |
| KR20240106574A (ko) | 연료전지용 암모니아 회수 시스템 및 방법 | |
| KR20230165990A (ko) | 선박의 암모니아 연료공급시스템 | |
| KR20250110416A (ko) | 암모니아연료추진선박 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22910749 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 20247020060 Country of ref document: KR Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202280083412.9 Country of ref document: CN Ref document number: 2022910749 Country of ref document: EP Ref document number: 1020247020060 Country of ref document: KR |
|
| ENP | Entry into the national phase |
Ref document number: 2022910749 Country of ref document: EP Effective date: 20240617 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |