WO2023112913A1 - 液化水素荷役システム、及びボイルオフガス移送システム - Google Patents

液化水素荷役システム、及びボイルオフガス移送システム Download PDF

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Publication number
WO2023112913A1
WO2023112913A1 PCT/JP2022/045825 JP2022045825W WO2023112913A1 WO 2023112913 A1 WO2023112913 A1 WO 2023112913A1 JP 2022045825 W JP2022045825 W JP 2022045825W WO 2023112913 A1 WO2023112913 A1 WO 2023112913A1
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WO
WIPO (PCT)
Prior art keywords
gas
seal
boil
hydrogen
cargo handling
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
Application number
PCT/JP2022/045825
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English (en)
French (fr)
Japanese (ja)
Inventor
智教 高瀬
邦裕 山本
健太 木元
義亜 合志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kawasaki Heavy Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kawasaki Jukogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Heavy Industries Ltd, Kawasaki Jukogyo KK filed Critical Kawasaki Heavy Industries Ltd
Priority to JP2023567787A priority Critical patent/JP7792968B2/ja
Priority to CN202280078045.3A priority patent/CN118302630A/zh
Priority to KR1020247018897A priority patent/KR20240104151A/ko
Publication of WO2023112913A1 publication Critical patent/WO2023112913A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • 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
    • F17C13/06—Closures, e.g. cap, breakable member
    • 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
    • F17C2221/012—Hydrogen
    • 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

Definitions

  • the present disclosure relates to a liquefied hydrogen cargo handling system for cargo handling of liquefied hydrogen and a boil-off gas transfer system for transferring boil-off gas.
  • the cargo handling system of Patent Literature 1 is provided, for example, at an LNG receiving terminal.
  • the cargo handling system includes cargo handling equipment.
  • LNG is discharged from a discharge side tank (for example, a tank of an LNG ship) to a receiving side tank (for example, a tank at a base) by cargo handling equipment.
  • the boil-off gas in the receiving side tank is returned to the dispensing side tank as the return gas when it is dispensed.
  • the discharge side tank is prevented from becoming negative pressure.
  • the cargo handling equipment provided in the cargo handling system of Patent Document 1 has various configurations. Each arrangement is provided with a sealing device to prevent gas from escaping between the parts. Sealing devices use seal gas together with mechanical seals such as gaskets. Nitrogen is used as the seal gas.
  • the liquefied gas that is loaded and unloaded in the cargo handling system of Patent Document 1 is LNG, but the liquefied gas that is loaded and unloaded includes hydrogen in addition to LNG.
  • the liquefaction temperature of hydrogen is lower than the solidification temperature of nitrogen. Therefore, when hydrogen is unloaded using the same cargo handling system as LNG, the nitrogen seal gas solidifies. Then, it is conceivable that the sealing device will not function.
  • a boil-off gas transfer system including transfer equipment for transferring boil-off gas it is conceivable that the sealing device of the transfer equipment will not function.
  • an object of the present disclosure is to provide a liquefied hydrogen cargo handling system and a boil-off gas transfer system that can prevent the solidification of the seal gas and the failure of the seal device to function.
  • a liquefied hydrogen cargo handling system includes a hydrogen tank for storing liquefied hydrogen, cargo handling equipment for cargo handling of the liquefied hydrogen in the hydrogen tank, and a cargo handling equipment provided in the cargo handling equipment to provide a second line between the inside of the cargo handling equipment and the atmosphere. and a seal gas supply system for supplying boil-off gas vaporized in the hydrogen tank as a first seal gas to the seal device.
  • the liquefaction of the seal gas can be suppressed by using the hydrogen, which is the boil-off gas, as the seal gas of the seal device.
  • the hydrogen which is the boil-off gas
  • the boil-off gas transfer system of the present disclosure includes a hydrogen tank when liquefied hydrogen is stored, a transfer facility for transferring the boil-off gas vaporized in the hydrogen tank, and a transfer facility provided in the transfer facility, between the transfer facility and the atmosphere. a sealing device for sealing with a first sealing gas, the sealing device being supplied with a boil-off gas as the first sealing gas.
  • the liquefaction of the seal gas can be suppressed by using hydrogen, which is the boil-off gas, as the seal gas of the seal device.
  • hydrogen which is the boil-off gas
  • FIG. 1 is a configuration diagram showing a liquefied hydrogen cargo handling system according to a first embodiment of the present disclosure
  • FIG. FIG. 2 is a cross-sectional view showing a seal device of the liquefied hydrogen cargo handling system of FIG. 1
  • FIG. 2 is a configuration diagram showing the flow of boil-off gas outside the cargo handling period in the liquefied hydrogen cargo handling system of FIG. 1
  • FIG. 2 is a configuration diagram showing the flow of boil-off gas during a cargo handling period in the liquefied hydrogen cargo handling system of FIG. 1
  • Fig. 2 is a configuration diagram showing a liquefied hydrogen cargo handling system according to a second embodiment of the present disclosure
  • FIG. 11 is a configuration diagram showing a liquefied hydrogen cargo handling system according to a third embodiment of the present disclosure
  • FIG. 11 is a configuration diagram showing a boil-off gas transfer system according to a fourth embodiment of the present disclosure;
  • the liquefied hydrogen cargo handling systems 1, 1A, and 1B of the first to third embodiments and the boil-off gas transfer system 1C of the fourth embodiment according to the present disclosure will be described with reference to the aforementioned drawings.
  • the concept of direction used in the following description is used for convenience of explanation, and does not limit the direction of the disclosed configuration.
  • the liquefied hydrogen cargo handling systems 1, 1A, 1B and the boil-off gas transfer system 1C described below are merely embodiments of the present disclosure. Therefore, the present disclosure is not limited to the embodiments, and additions, deletions, and modifications can be made without departing from the gist of the disclosure.
  • a liquefied hydrogen loading/unloading system 1 shown in FIG. 1 loads/unloads liquefied hydrogen to/from a tank 2 provided on a ship or land facility.
  • the liquefied hydrogen cargo handling system 1 is provided on land such as a port.
  • the tank 2 is provided on a vessel (eg, tanker) and can store liquefied hydrogen.
  • the liquefied hydrogen cargo handling system 1 performs cargo handling with the tank 2 of the ship.
  • the liquefied hydrogen cargo handling system 1 does not necessarily have to be provided on land.
  • the liquefied hydrogen cargo handling system 1 may be provided on a ship.
  • the liquefied hydrogen cargo handling system 1 will be described in more detail.
  • the liquefied hydrogen cargo handling system 1 includes a hydrogen tank 11, cargo handling equipment 12, a seal device 13, a seal gas supply system 14, and a discharge equipment 15. .
  • the hydrogen tank 11 can store liquefied hydrogen.
  • the hydrogen tank 11 has a heat insulating structure such as a vacuum heat insulating structure.
  • the hydrogen tank 11 keeps the temperature of the liquefied hydrogen stored therein below the boiling point of the liquefied hydrogen 11a. Also, in the hydrogen tank 11, part of the liquefied hydrogen is vaporized. A portion of the hydrogen tank 11 other than the liquefied hydrogen is filled with the boil-off gas 11b.
  • the tank 2 is also constructed in the same manner as the hydrogen tank 11 .
  • the cargo handling facility 12 loads and unloads liquefied hydrogen between the hydrogen tank 11 and the tank 2 . That is, the liquefied hydrogen stored in the hydrogen tank 11 is transported to the tank 2 , or the liquefied hydrogen stored in the tank 2 is transported to the hydrogen tank 11 . More specifically, the cargo handling equipment 12 has a liquefied hydrogen pipe 21 , a return gas pipe 22 , a hydraulic pump 23 and a return gas blower 24 .
  • the liquefied hydrogen pipe 21 is a pipe that connects the hydrogen tank 11 and the tank 2 . More specifically, the liquefied hydrogen pipe 21 is connected to the hydrogen tank 11 . Also, the liquefied hydrogen pipe 21 can be connected to the tank 2 via a joint (not shown). The liquefied hydrogen pipe 21 can flow liquefied hydrogen from the hydrogen tank 11 to the tank 2 or vice versa while being connected to the tank 2 .
  • the return gas pipe 22 is a pipe that connects the hydrogen tank 11 and the tank 2 . More specifically, the return gas pipe 22 is connected to the hydrogen tank 11, for example.
  • the return gas pipe 22 can be connected to the tank 2 via a joint (not shown) like the liquefied hydrogen pipe 21 . Further, the return gas pipe 22 can flow boil-off gas (return gas) from the hydrogen tank 11 to the tank 2 or vice versa.
  • the liquid pressure pump 23 is interposed in the liquefied hydrogen pipe 21 .
  • the hydraulic pump 23 can send liquefied hydrogen from the dispensing side tank (tank 2 in this embodiment) to the receiving side tank (hydrogen tank 11 in this embodiment). Thereby, liquefied hydrogen can be loaded and unloaded between the hydrogen tank 11 and the tank 2 .
  • the hydraulic pump 23 sends liquefied hydrogen in the direction opposite to the above-described direction.
  • the hydraulic pump 23 does not necessarily have to be provided in the cargo handling equipment 12, and may be provided in the cargo handling ship. Also, the hydraulic pump 23 may be provided inside the tank 2 or the hydrogen tank 11 .
  • the return gas blower 24 is interposed in the return gas pipe 22 . Then, the return gas blower 24 can send return gas from the receiving side tank (hydrogen tank 11 in this embodiment) to the payout side tank (tank 2 in this embodiment). When the dispensing side tank is the hydrogen tank 11, the return gas blower 24 sends the return gas in the direction opposite to the direction described above. Return gas blower 24 will be described in more detail.
  • Return gas blower 24 is, for example, a compressor. That is, the return gas blower 24 compresses and sends the return gas. More specifically, the return gas blower 24 has a casing 31 and an impeller 32 as shown in FIG.
  • the casing 31 is interposed in the return gas pipe 22 . More specifically, the casing 31 is formed with a flow path 31a and a shaft insertion hole 31b.
  • the flow path 31 a is interposed in the return gas pipe 22 . That is, one side and the other side of the flow path 31a are connected to the hydrogen tank 11 and the tank 2 via the return gas pipe 22, respectively.
  • the shaft insertion hole portion 31 b is a hole formed in the casing 31 . One side of the shaft insertion hole 31b opens to the flow path 31a, and the other side opens to the atmosphere.
  • the impeller 32 has a shaft portion 32a and an impeller portion 32b.
  • the shaft portion 32a is inserted through the shaft portion insertion hole portion 31b of the casing 31 and is rotatably supported there.
  • One axial end of the shaft portion 32a is connected to a prime mover such as an engine or an electric motor (not shown) provided outside the casing 31.
  • An impeller portion 32b is provided at the other axial end portion of the shaft portion 32a.
  • the impeller portion 32b is arranged in the flow path 31a.
  • the impeller portion 32b compresses the return gas in the flow path 31a when the shaft portion 32a is rotated by the prime mover.
  • the impeller portion 32b sends the return gas to either the hydrogen tank 11 or the tank 2 according to the rotation direction of the shaft portion 32a.
  • the cargo handling facility 12 configured in this manner operates as follows during the cargo handling period in which liquefied hydrogen is handled between the hydrogen tank 11 and the tank 2. That is, in the cargo handling equipment 12, when the liquefied hydrogen is loaded and unloaded, the hydraulic pressure pump 23 operates according to the transportation direction of the liquefied hydrogen.
  • the transportation direction is the direction from the dispensing side tank to the receiving side tank.
  • the receiving side tank is the hydrogen tank 11.
  • the receiving side tank is the tank 2.
  • the cargo handling equipment 12 when transporting liquefied hydrogen, operates the return gas blower 24 together with the hydraulic pump 23 according to the transportation direction. That is, the return gas blower 24 sends return gas in the direction opposite to the transportation direction. As a result, an excessive pressure drop in the dispensing side tank is suppressed, and an excessive pressure rise in the receiving side tank is suppressed.
  • the sealing device 13 is provided in the cargo handling equipment 12 .
  • the seal device 13 seals the space between the cargo handling facility 12 and the atmosphere with a seal gas. More specifically, the seal device 13 seals the space between the interior of the cargo handling facility 12 through which cryogenic hydrogen flows and the atmosphere with a seal gas.
  • “sealing” means that the gas flowing inside the cargo handling equipment 12, that is, the boil-off gas is not released to the atmosphere.
  • the term "extremely low temperature” means a temperature below the temperature at which nitrogen solidifies.
  • the sealing device 13 is provided in the return gas blower 24 of the cargo handling equipment 12 .
  • the seal device 13 seals the space between the inside of the return gas blower 24 and the atmosphere with a seal gas.
  • the return gas blower 24 is an example of a target on which the sealing device 13 is provided, and may be provided in piping or other equipment in the cargo handling facility 12 .
  • the sealing device 13 is particularly suitable for sealing between two members that move relative to each other. However, the sealing device 13 may be used to seal between two members that do not move relative to each other.
  • the sealing device 13 constitutes a boil-off gas transfer system 60 together with the hydrogen tank 11 and the return gas blower 24, which is an example of transfer equipment.
  • the boil-off gas transfer system 60 also includes a seal gas supply system 14, which will be described later. Describing the sealing device 13 in more detail, the sealing device 13 has three sealing members 13 a - 13 c , a first sealing gas space 34 and a second sealing gas space 35 .
  • the three sealing members 13a to 13c are provided between the casing 31 and the shaft portion 32a in the return gas blower 24. More specifically, the sealing members 13a-13c are formed in an annular shape. Each seal member 13a to 13c is composed of one or more seals. A first sealing member 13a, a second sealing member 13b, and a third sealing member 13c are mounted on the shaft portion 32a in order from the inside of the return gas blower 24 with a space therebetween. The sealing members 13a to 13c are interposed between the shaft insertion hole 31b and the shaft 32a of the casing 31 to seal the space between the shaft insertion hole 31b and the shaft 32a.
  • the first sealing gas space 34 and the second sealing gas space 35 are arranged between the inside of the return gas blower 24 and the atmosphere side.
  • the boil-off gas which is the first seal gas
  • the second seal gas space 35 is provided closer to the atmosphere than the first seal gas space 34 is.
  • a second seal gas which is nitrogen gas, is supplied from the nitrogen supply device 16 to the second seal gas space 35 .
  • the seal device 13 seals the space between the inside of the return gas blower 24 and the atmosphere with the first and second seal gases supplied to the two seal gas spaces 34 and 35, respectively.
  • the second seal gas is not limited to nitrogen gas, and may be other gas such as argon gas.
  • first seal gas space 34 and the second seal gas space 35 are formed in the shaft insertion hole 31b of the casing 31.
  • a first seal gas space 34 is formed between the first seal member 13a and the second seal member 13b
  • a second seal gas space 35 is formed between the second seal member 13b and the third seal member 13c.
  • the first seal gas space 34 and the second seal gas space 35 are formed along the entire circumference of the shaft insertion hole 31b and are recessed radially outward. That is, the first sealing gas space 34 and the second sealing gas space 35 are formed in an annular shape so as to surround the shaft portion 32a over the entire circumferential direction.
  • the sealing members 13a to 13c suppress the release of the return gas in the return gas blower 24 to the atmosphere.
  • the sealing device 13 captures by means of the first sealing gas space 34 the return gas that slightly escapes through the sealing member 13a.
  • the seal device 13 prevents the return gas from leaking into the atmosphere.
  • the second seal gas space 35 captures the first seal gas leaking from the first seal gas space 34 through the second seal member 13b.
  • the sealing device 13 suppresses the leakage of the first sealing gas.
  • the first sealing gas and the second sealing gas seal the space between the inside of the return gas blower 24 and the atmosphere.
  • the seal gas supply system 14 supplies the boil-off gas vaporized in the hydrogen tank 11 to the seal device 13 as the first seal gas. More specifically, the seal gas supply system 14 has a boil-off gas recovery line 41 , a compressor 42 , a boil-off gas storage tank 43 , and a supply line 44 .
  • a boil-off gas recovery line 41 is connected to the hydrogen tank 11 .
  • the boil-off gas of the hydrogen tank 11 is introduced to the boil-off gas recovery line 41 .
  • the boil-off gas recovery line 41 is connected to the return gas pipe 22 so as to branch.
  • the compressor 42 is interposed in the boil-off gas recovery line 41.
  • the compressor 42 sucks and compresses the boil-off gas guided to the boil-off gas recovery line 41 . Then, the compressor 42 sends it to the downstream side of the boil-off gas recovery line 41 .
  • the boil-off gas storage tank 43 stores the boil-off gas transferred by the compressor 42 . More specifically, the boil-off gas storage tank 43 is connected to the boil-off gas recovery line 41 . The boil-off gas (that is, compressed gas) compressed by the compressor 42 is sent to the boil-off gas storage tank 43 via the boil-off gas recovery line 41 . Then, the boil-off gas storage tank 43 stores therein the sent compressed gas. Further, the boil-off gas storage tank 43 holds the compressed gas at room temperature.
  • the boil-off gas that is, compressed gas
  • the supply line 44 is connected to the boil-off gas storage tank 43 . Also, the supply line 44 is connected to the sealing device 13 . That is, the boil-off gas storage tank 43 is connected to the sealing device 13 via the supply line 44 . More specifically, the supply line 44 is connected to the first sealing gas space 34 in the sealing device 13 .
  • the boil-off gas of the hydrogen tank 11 is stored in the boil-off gas storage tank 43 . More specifically, in the seal gas supply system 14 , the boil-off gas of the hydrogen tank 11 is stored in the boil-off gas storage tank 43 outside the cargo handling period when the cargo handling equipment 12 is not performing cargo handling work. That is, in the seal gas supply system 14, the compressor 42 is driven outside the cargo handling period. Thereby, the boil-off gas in the hydrogen tank 11 is sucked into the compressor 42 via the boil-off gas recovery line 41 . Further, the boil-off gas is compressed by the compressor 42 and sent to the boil-off gas storage tank 43 . As a result, the compressed gas is stored in the boil-off gas storage tank 43 .
  • the boil-off gas stored in the boil-off gas storage tank 43 is sent to the seal device 13 as the first seal gas during the cargo handling period. More specifically, in the seal gas supply system 14 , the first seal gas is supplied from the boil-off gas storage tank 43 to the first seal gas space 34 of the seal device 13 . A second seal gas is supplied from the nitrogen supply device 16 to the second seal gas space 35 . That is, the sealing device 13 is supplied with the first sealing gas and the second sealing gas. Thereby, the sealing device 13 seals between the inside of the return gas blower 24 and the atmosphere.
  • the exhaust facility 15 exhausts the first seal gas supplied to the first seal gas space 34 . More specifically, exhaust facility 15 communicates with first seal gas space 34 and the atmosphere. The discharge facility 15 then discharges the first seal gas supplied to the first seal gas space 34 to the atmosphere. The exhaust facility 15 is also connected to a second seal gas space 35 in addition to the first seal gas space 34 . The exhaust facility 15 also vents the second seal gas space 35 to the atmosphere. More specifically, the discharge facility 15 discharges a mixed gas containing the first seal gas and the second seal gas to the atmosphere.
  • the discharge equipment 15 has a vent line 51 and a valve 52 .
  • the vent line 51 is connected to the first seal gas space 34 and the second seal gas space 35 and to the atmosphere.
  • the vent line 51 is provided with a valve 52 . Then, the discharge facility 15 opens the valve 52 while the return gas blower 24 is being driven. As a result, the mixed gas containing the two seal gases supplied to the respective seal gas spaces 34 and 35 is discharged to the atmosphere through the vent line 51 .
  • the liquefied hydrogen cargo handling system 1 operates as follows during the cargo handling period. That is, in the liquefied hydrogen cargo handling system 1 , cargo handling of liquefied hydrogen is started by connecting the tank 2 to the cargo handling equipment 12 . In the following, as shown by the thick line in FIG. 4, the case where the dispensing side tank is the tank 2 and the receiving side tank is the hydrogen tank 11 will be described as an example. That is, in the liquefied hydrogen cargo handling system 1, the hydraulic pump 23 operates during the cargo handling period. Then, liquefied hydrogen is transported from the tank 2 to the hydrogen tank 11 . On the other hand, in the liquefied hydrogen cargo handling system 1, the return gas blower 24 also operates during the cargo handling period.
  • the return gas blower 24 sends the boil-off gas of the hydrogen tank 11 to the tank 2 as return gas.
  • the delivery side tank is the hydrogen tank 11 and the receiving side tank is the tank 2
  • each of the liquefied hydrogen and the return gas is sent in the direction opposite to the direction described above.
  • the compressed gas stored in the boil-off gas storage tank 43 is supplied as seal gas from the seal gas supply system 14 to the seal device 13 ( See the two-dot bold line in Fig. 4). More specifically, valve 52 is opened in exhaust facility 15 while return gas blower 24 is operating. Then, the compressed gas in the boil-off gas storage tank 43 is supplied to the supply line 44 of the seal gas supply system 14 as the seal gas. The seal gas then flows to the first seal gas space 34 of the seal device 13 via the supply line 44 . In the first seal gas space 34, the first seal gas captures the return gas that slightly leaks through the seal member 13a.
  • the second seal gas space 35 is supplied with a second seal gas, which is nitrogen gas, from a supply device (not shown).
  • a second seal gas which is nitrogen gas
  • the sealing device 13 seals between the inside of the return gas blower 24 and the atmosphere with the first sealing gas and the second sealing gas.
  • the first seal gas in the first seal gas space 34 is discharged to the atmosphere through the vent line 51 .
  • the first seal gas can be constantly supplied to the first seal gas space 34, it is possible to suppress a decrease in the temperature of the first seal gas.
  • the second seal gas is discharged to the atmosphere through the vent line 51 together with the first seal gas.
  • the second seal gas can be constantly supplied to and discharged from the second seal gas space 35, thereby suppressing a decrease in the temperature of the second seal gas. That is, the solidification of nitrogen, which is the second seal gas, is further suppressed.
  • the liquefied hydrogen cargo handling system 1 of the present embodiment by using hydrogen, which is boil-off gas, as the first seal gas of the seal device 13, liquefaction of the first seal gas can be suppressed. As a result, it is possible to prevent the sealing device 13 from failing to function due to solidification of the first sealing gas.
  • the second sealing gas space 35 through which nitrogen gas flows is arranged closer to the atmosphere than the first sealing gas space 34, so the nitrogen gas in the second sealing gas space 35 may not solidify. can be suppressed. Therefore, it is possible to prevent the sealing device 13 from failing to function due to solidification of the nitrogen gas, which is the sealing gas. Further, by interposing nitrogen gas between the boil-off gas and the atmosphere, it is possible to suppress the first seal gas from being discharged to the atmosphere as it is.
  • boil gas is stored in the boil-off gas storage tank 43 outside the cargo handling period. Then, during the cargo handling period, the stored boil-off gas can be supplied to the seal device 13 as the seal gas. Thereby, a large amount of seal gas can be supplied to the seal device 13 .
  • the boil-off gas is compressed and supplied to the boil-off gas storage tank 43, so more boil-off can be stored in the boil-off gas storage tank 43. As a result, more seal gas can be supplied to the seal device 13 during the period.
  • the first seal gas in the first seal gas space 34 is discharged from the discharge equipment 15 .
  • the first seal gas can be continuously supplied from the seal gas supply system 14 to the first seal gas space 34, the first seal gas stays in the first seal gas space 34 and is cooled by the return gas. can be suppressed. That is, it is possible to suppress the temperature drop of the first seal gas. As a result, it is possible to suppress the temperature drop of the second sealing gas, so that it is possible to further suppress the non-functioning of the sealing device 13 due to the solidification of the nitrogen gas.
  • the sealing device 13 is provided in the return gas blower 24 included in the cargo handling equipment 12 . Therefore, it is possible to prevent the return gas blower 24 from becoming stuck due to solidification of the seal gas.
  • the boil-off gas transfer system 60 by using hydrogen, which is the boil-off gas, as the first seal gas of the seal device 13, liquefaction of the first seal gas can be suppressed. As a result, it is possible to prevent the sealing device 13 from failing to function due to solidification of the first sealing gas.
  • a liquefied hydrogen cargo handling system 1A of the second embodiment is similar in configuration to the liquefied hydrogen cargo handling system 1 of the first embodiment. Therefore, with regard to the configuration of the liquefied hydrogen cargo handling system 1A of the second embodiment, differences from the liquefied hydrogen cargo handling system 1 of the first embodiment will be mainly described, and the same configurations will be assigned the same reference numerals. Omitted.
  • the discharge facility 15A returns the discharged first seal gas to the seal gas supply system 14 . More specifically, the first seal gas is discharged from the first seal gas space 34 to the discharge facility 15A. Then, the discharge equipment 15A returns the discharged first seal gas to the seal gas supply system 14 . More specifically, the discharge facility 15A has a mixed gas recovery line 53, a mixed gas blower 54, a hydrogen regeneration device 55, a hydrogen recovery line 56, a vent line 51A, and a valve 52.
  • the mixed gas recovery line 53 is connected to the first sealing gas space 34 and the second sealing gas space 35 . Seal gas is discharged from each of the first seal gas space 34 and the second seal gas space 35 to the mixed gas recovery line 53 .
  • a mixed gas in which the two seal gases are mixed flows through the mixed gas recovery line 53 .
  • a mixed gas blower 54 is interposed in the mixed gas recovery line 53 . Then, the mixed gas blower 54 sends the mixed gas flowing through the mixed gas recovery line 53 to its downstream side (specifically, the hydrogen regeneration device 55 described in detail later).
  • the hydrogen regeneration device 55 is connected to the first seal gas space 34 and the second seal gas space 35. More specifically, the hydrogen regeneration device 55 is connected to the first seal gas space 34 and the second seal gas space 35 via a mixed gas recovery line 53 . The hydrogen regeneration device 55 separates the first seal gas and the second seal gas from the mixed gas. Then, the hydrogen regeneration device 55 separates the first seal gas (that is, hydrogen) from the mixed gas and returns it to the seal gas supply system 14 .
  • the hydrogen regeneration device 55 separates the first seal gas and the second seal gas from the mixed gas, for example, as follows. That is, the return gas pipe 22 is passed through the hydrogen regeneration device 55 . In the hydrogen regeneration device 55, heat is exchanged between the return gas flowing through the return gas pipe 22 and the mixed gas. Thereby, the hydrogen regeneration device 55 liquefies or solidifies the second seal gas (that is, nitrogen) of the mixed gas. On the other hand, the first seal gas, which is hydrogen, is maintained in a gaseous state. Therefore, in the hydrogen regeneration unit 55, the first seal gas and the second seal gas are separated from the mixed gas.
  • the separation method is not limited to the above-described method using cold heat, and other methods (for example, pressure swing adsorption method (PSA method)) may be used.
  • PSA method pressure swing adsorption method
  • the hydrogen regeneration device 55 re-vaporizes nitrogen, which is the second seal gas that has been liquefied or solidified outside the cargo handling period. More specifically, the nitrogen is liquefied or solidified by the return gas as described above. Therefore, when the flow of the return gas in the return gas pipe 22 stops, such as outside the cargo handling period, the liquefied or solidified nitrogen evaporates again.
  • the hydrogen recovery line 56 returns the first seal gas separated by the hydrogen regeneration device 55, ie hydrogen, to the seal gas supply system 14. More specifically, hydrogen recovery line 56 is connected to hydrogen regenerator 55 and compressor 42 . Hydrogen separated by the hydrogen regeneration device 55 is introduced into the hydrogen recovery line 56 . Hydrogen introduced to the hydrogen recovery line 56 is sucked into the compressor 42 and compressed. The compressed gas is sent to the boil-off gas storage tank 43 via the boil-off gas recovery line 41 . In this way, the hydrogen separated by the hydrogen regeneration device 55 is stored in the boil-off gas storage tank 43 as compressed gas. An opening/closing valve 56 a is interposed in the hydrogen recovery line 56 . The open/close valve 56a closes the hydrogen recovery line 56 during the cargo handling period. This prevents the boil-off gas from flowing back into the hydrogen regeneration device 55 .
  • vent line 51A discharges the gas flowing through the hydrogen recovery line 56. More specifically, vent line 51A is connected to hydrogen recovery line 56 and the atmosphere. A valve 52 is provided in the vent line 51A. The valve 52 is opened when the vaporized nitrogen is discharged outside the cargo handling period, and the valve 52 is closed during the cargo handling period. Thereby, the second seal gas separated by the hydrogen regeneration device 55 can be discharged to the atmosphere.
  • liquefied hydrogen cargo handling system 1A cargo handling is performed between the hydrogen tank 11 and the tank 2 during the cargo handling period, similar to the liquefied hydrogen cargo handling system 1 of the first embodiment.
  • the first seal gas is supplied from the seal gas supply system 14 to the seal device 13 (see the two-dot bold line in FIG. 5).
  • the mixed gas containing the sealing gas discharged from each of the first sealing gas space 34 and the second sealing gas space 35 is guided to the mixed gas recovery line 53. Further, the mixed gas is sent to the hydrogen regeneration device 55 by the mixed gas blower 54 . Then, the hydrogen regeneration device 55 separates the first seal gas and the second seal gas from the mixed gas. Also, the separated first seal gas, that is, hydrogen is sucked into the compressor 42 via the hydrogen recovery line 56 and compressed. The compressed hydrogen is stored in a boil-off gas storage tank 43 . The hydrogen stored in the boil-off gas storage device is again supplied to the first seal gas space 34 through the seal gas supply system 14 as the first seal gas. That is, the separated first seal gas is regenerated as the first seal gas.
  • the first seal gas discharged by the discharge equipment 15A is returned to the seal gas supply system 14, so the first seal gas can be reused.
  • hydrogen can be regenerated from the mixed gas discharged from the seal device 13 .
  • the liquefied hydrogen cargo handling system 1A of the second embodiment has the same effects as the liquefied hydrogen cargo handling system 1 of the first embodiment.
  • the liquefied hydrogen cargo handling system 1B includes, as shown in FIG.
  • the seal device 13B is provided in a compressor 42, which is an example of transfer equipment in this embodiment.
  • the sealing device 13B is connected to the supply line 44 of the sealing gas supply system 14 and the discharge facility 15 so as to be parallel to the sealing device 13 .
  • the sealing device 13B may be connected to the discharging equipment 15 connected to the sealing device 13 and another discharging equipment 15 .
  • a boil-off gas is supplied as the first seal gas from the seal gas supply system 14 to the seal device 13B.
  • the seal device 13B seals the space between the inside of the compressor 42 and the atmosphere with the first seal gas.
  • the structure of the sealing device 13B is similar to that of the sealing device 13. More specifically, the compressor 42 of the present embodiment transfers the boil-off gas 11b with an impeller, like the return gas blower 24 does. Therefore, the structure of the sealing device 13B is similar to that of the sealing device 13. As shown in FIG. Therefore, for the sealing device 13B, the description of the sealing device 13 is referred to, and detailed description of the sealing device 13B is omitted.
  • the seal device 13B constitutes a boil-off gas transfer system 60B together with the hydrogen tank 11 and the compressor 42 (more specifically, the seal gas supply system 14).
  • the boil-off gas transfer system 60B by using hydrogen, which is the boil-off gas 11b, as the first seal gas of the seal device 13B, liquefaction of the first seal gas can be suppressed. As a result, it is possible to prevent the sealing device 13B from failing to function due to solidification of the first sealing gas.
  • the compressor 42 that sends the boil-off gas 11b to the boil-off gas storage tank 43 is provided with the seal device 13B. Therefore, it is possible to prevent the seal gas from solidifying and causing the compressor 42 to stop working. Thereby, the boil-off gas 11b can be continuously sent to the boil-off gas storage tank 43 .
  • the liquefied hydrogen cargo handling system 1B and the boil-off gas transfer system 60B have the same effects as the liquefied hydrogen cargo handling system 1 and the boil-off gas transfer system 60 of the first embodiment.
  • the boil-off gas transfer system 60C shown in FIG. 7 transfers the boil-off gas 11b from the tank 2 to the land facility 3.
  • the land facility 3 is a facility that uses the boil-off gas 11b as a fuel or raw material, and is a power plant, a factory, or the like.
  • the land facility 3 is a power plant that generates power using hydrogen. Note that the land facility 3 does not necessarily have to include the tank 2 as described above.
  • the boil-off gas transfer system 60C includes a hydrogen tank 11, a transfer facility 12C, a seal device 13C, a seal gas supply system 14, and a discharge facility 15.
  • the transfer equipment 12C transfers the boil-off gas 11b vaporized in the hydrogen tank 11. More specifically, transfer facility 12C is connected to hydrogen tank 11 and land facility 3 . In this embodiment, the transfer facility 12C is connected to the hydrogen tank 11 so as to be parallel to the seal gas supply system 14 . Further, the transfer facility 12C compresses the boil-off gas 11b vaporized in the hydrogen tank 11 and transfers it to the land facility 3. In this embodiment, the transfer facility 12C is a compressor. It should be noted that the transfer facility 12C is similar in structure to the compressor 42 and the return gas blower 24 . Therefore, the structure of the sealing device 13C is also similar to the structure of the sealing device 13C. Therefore, for the structures of the transfer equipment 12C and the sealing device 13C, refer to the description of the structures of the return gas blower 24 and the sealing device 13, and detailed description thereof will be omitted.
  • the transfer facility 12C is a compressor that compresses the boil-off gas 11b and transfers it to the land facility 3. Therefore, it is possible to prevent the seal gas from solidifying and jamming the transfer equipment 12C. Thereby, the boil-off gas 11b can be continuously sent to the land facility 3.
  • boil-off gas transfer system 60C has the same effects as the boil-off gas transfer system 60 of the first embodiment.
  • the liquefied hydrogen cargo handling systems 1, 1A, and 1B are facilities for loading and unloading liquefied hydrogen with a cargo handling vessel (not shown). It may be a facility for loading and unloading liquefied hydrogen between.
  • the tanks mounted on the cargo handling vessel are hydrogen tanks.
  • the liquefied hydrogen cargo handling systems 1, 1A, and 1B may perform cargo handling between land facilities and transport vehicles.
  • the object to be sealed by the sealing device 13 is the return gas blower 24;
  • the above-described structures are merely examples. However, other structures are also possible.
  • the sealing device 13 may have, for example, only the first sealing gas space 34 without the second sealing gas space 35, so that at least the first sealing gas seals between the cargo handling equipment 12 and the atmosphere. Anything that does.
  • the seal gas supply system 14 has the boil-off gas storage tank 43, but it does not necessarily have to have it.
  • part of the boil-off gas may be supplied to the seal device 13 as the first seal gas during cargo handling.
  • the boil-off gas stored in the boil-off gas storage tank 43 does not necessarily have to be supplied only to the sealing devices 13, 13B, and 13C, and even if it is supplied to the land facility 3 good.
  • the return gas blower 24 and the compressor 42 are given as an example of transfer equipment in the boil-off gas transfer systems 60, 60B, and 60C of the first to fourth embodiments, pumps may also be used.
  • the transfer equipment can transfer the boil-off gas 11b, and in particular, any device that can pressurize the boil-off gas 11b to be transferred.
  • the boil-off gas transfer system 60C of the fourth embodiment includes one transfer facility 12C, it may be provided with a plurality of transfer facilities 12C.
  • a sealing device 13C is provided in all of the plurality of transfer facilities 12C or in at least one or more of the transfer facilities 12C.
  • the compressor of the transfer facility 12C is not limited to a centrifugal compressor having an impeller, and may be another type of compressor such as a reciprocating compressor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
PCT/JP2022/045825 2021-12-14 2022-12-13 液化水素荷役システム、及びボイルオフガス移送システム Ceased WO2023112913A1 (ja)

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CN202280078045.3A CN118302630A (zh) 2021-12-14 2022-12-13 液化氢装卸系统及蒸发气体移送系统
KR1020247018897A KR20240104151A (ko) 2021-12-14 2022-12-13 액화수소 하역 시스템 및 보일 오프 가스 이송 시스템

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957094A (ja) * 1982-09-27 1984-04-02 Hitachi Zosen Corp Ｌｎｇ運搬船におけるボイルオフガスの利用方法
JP2010196606A (ja) * 2009-02-25 2010-09-09 Chugoku Electric Power Co Inc:The 石炭ガス化複合発電プラント
JP2011001993A (ja) * 2009-06-17 2011-01-06 Iwatani Internatl Corp 液化水素貯蔵供給設備
JP2013024376A (ja) * 2011-07-25 2013-02-04 Air Liquide Japan Ltd 低温物質の移送装置およびこれを用いた低温液化ガス供給システム

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Publication number Priority date Publication date Assignee Title
JP2011099500A (ja) 2009-11-05 2011-05-19 Ihi Corp 防災遮断システム
CN206221200U (zh) * 2016-10-25 2017-06-06 华油天然气广安有限公司 冷剂压缩机使用bog气体作为密封气的系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957094A (ja) * 1982-09-27 1984-04-02 Hitachi Zosen Corp Ｌｎｇ運搬船におけるボイルオフガスの利用方法
JP2010196606A (ja) * 2009-02-25 2010-09-09 Chugoku Electric Power Co Inc:The 石炭ガス化複合発電プラント
JP2011001993A (ja) * 2009-06-17 2011-01-06 Iwatani Internatl Corp 液化水素貯蔵供給設備
JP2013024376A (ja) * 2011-07-25 2013-02-04 Air Liquide Japan Ltd 低温物質の移送装置およびこれを用いた低温液化ガス供給システム

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