WO2015126119A1 - Système et procédé permettant de traiter un gaz d'évaporation - Google Patents

Système et procédé permettant de traiter un gaz d'évaporation Download PDF

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Publication number
WO2015126119A1
WO2015126119A1 PCT/KR2015/001546 KR2015001546W WO2015126119A1 WO 2015126119 A1 WO2015126119 A1 WO 2015126119A1 KR 2015001546 W KR2015001546 W KR 2015001546W WO 2015126119 A1 WO2015126119 A1 WO 2015126119A1
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WIPO (PCT)
Prior art keywords
gas
lng
boil
storage tank
line
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PCT/KR2015/001546
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English (en)
Korean (ko)
Inventor
이창우
문영식
유병용
김낙현
장재호
김지은
Original Assignee
대우조선해양 주식회사
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Priority to CN201580010000.2A priority Critical patent/CN106029490B/zh
Priority to SG11201607024RA priority patent/SG11201607024RA/en
Priority to JP2016553528A priority patent/JP6366727B2/ja
Publication of WO2015126119A1 publication Critical patent/WO2015126119A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D9/00—Apparatus or devices for transferring liquids when loading or unloading ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/021—Control of components of the fuel supply system
    • F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/029—Arrangement on engines or vehicle bodies; Conversion to gaseous fuel supply systems
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/036—Very high pressure, i.e. above 80 bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • 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
    • F17C2265/05—Regasification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F17C2270/011—Barges
    • F17C2270/0113—Barges floating
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the present invention relates to a boil-off gas treatment system and method, and more particularly, to supply boil-off gas generated in the LNG storage tank while supplying natural gas to the land and the like through a regasification line for regasifying LNG stored in the LNG storage tank.
  • the present invention relates to a boil-off gas treatment system and method that can be compressed to high pressure and fed downstream of a regasification line to be fed to land and treated with regasified natural gas.
  • Liquefied Natural Gas (hereinafter referred to as "LNG”) is a colorless and transparent liquid obtained by liquefying natural gas containing methane as its main component at about -162 °C. It has a volume of about / 600. Therefore, when liquefied into LNG when transporting natural gas can be transported very efficiently.
  • LNG storage tanks provided in LNG carriers, LNG-FPSOs, RVs, etc. are insulated, but the external heat is continuously transferred to the LNG storage tanks. Natural vaporization generates boil-off gas (BOG) in the LNG storage tank.
  • BOG boil-off gas
  • BOG is a kind of LNG loss, which is an important problem in LNG transportation efficiency, and if boil-off gas accumulates in LNG storage tank, the pressure in LNG storage tank may be excessively increased and the tank may be damaged.
  • Various ways to deal with this have been studied.
  • the present invention is to propose a system and method that can effectively and safely treat the boil off gas generated in the storage tank of the vessel or offshore structures, such as LNG-RV and LNG-FSRU.
  • a boil-off gas treatment system including a high-pressure compression line for compressing the boil-off gas generated in the LNG storage tank to a high pressure to supply downstream of the regasification line.
  • the system comprises a recondenser provided in the regasification line to receive the supercooled LNG from the LNG storage tank, and the boil-off gas generated in the LNG storage tank is compressed to a low pressure and supplied to the recondenser. It may further include a low pressure condensation line to condense by heat exchange with the LNG.
  • the system includes a high pressure pump provided in the regasification line for supplying and compressing LNG from a recondenser, a vaporizer provided in the regasification line to vaporize LNG compressed by the high pressure pump, and provided in the high pressure compression line. It may further include a high pressure compressor for receiving the boil-off gas from the LNG storage tank and compresses at high pressure.
  • the boil-off gas compressed at high pressure in the compressor may be supplied downstream of the vaporizer in the regasification line.
  • the system is provided in the low pressure condensation line, the low pressure compressor supplied with the boil-off gas from the LNG storage tank and compressed to low pressure and supplied to the recondensing unit, and provided in the LNG storage tank pumped LNG by the supercooled state It may further include an LNG feed pump for supplying to the recondensing furnace.
  • the system includes a fuel supply line for supplying the boil-off gas compressed from the high-pressure compression line and the low-pressure condensation line to a gas consumer including a gas engine, a gas compression unit (GCU), and a boiler of the vessel or offshore structure. It may further include.
  • a gas consumer including a gas engine, a gas compression unit (GCU), and a boiler of the vessel or offshore structure. It may further include.
  • GCU gas compression unit
  • the vessel or offshore structure may include a LNG Regasification Vessel (LV-RV) and a Floating Storage Regasification Unit (FSRU) for supplying natural gas to the land by regasifying LNG.
  • LV-RV LNG Regasification Vessel
  • FSRU Floating Storage Regasification Unit
  • Regasifying LNG stored in the LNG storage tank and supplying natural gas to the land, while compressing the boil-off gas generated in the LNG storage tank to a high pressure to supply to the land with the regasified natural gas Provided is a method for treating boil-off gas.
  • the boil-off gas generated in the LNG storage tank may be compressed to low pressure, mixed with the LNG to be regasified, and condensed.
  • the boil-off gas generated in the LNG storage tank is mixed with the LNG to be regasified after low-pressure compression and recondensed, while re-condensed by cold heat of the LNG and the remaining boil-off gas is compressed to high pressure to recover It can be supplied to the land with natural gas.
  • Compressed gas can be compressed to low pressure and recondensed with cold heat of supercooled LNG to be regasified. If the amount of LNG to be regasified is small, the boiled gas can be compressed to high pressure and supplied to the land through a regasification line. It can effectively treat the boil-off gas.
  • FIG. 1 schematically shows an example of an evaporative gas treatment system.
  • Figure 2 schematically shows a boil-off gas treatment system according to an embodiment of the present invention.
  • the boil-off gas treatment system to be described later may be applied to a ship or offshore structure in which an LNG storage tank is provided to generate boil-off gas from the storage tank.
  • LNG-RV Registered Landing Vessel
  • LNG And LNG-FSRU Floating Storage Regasification Unit
  • the amount of BOG generated in the LNG storage tank is 3 to 4 ton / h in Laden condition, 0.3 to 0.4 in the ballast condition, for example, 150,000m3 capacity vessel It is known to reach ton / h.
  • BOR Bit Off Rate
  • FIG. 1 schematically shows an example of an evaporative gas treatment system.
  • the boil-off gas treatment system shown in FIG. 1 pumps LNG from the storage tank T to the recondenser 20 and supplies natural gas to the land via a pump 30 and a vaporizer 40 for compression at high pressure.
  • the vaporized gas generated in the storage tank is compressed at low pressure by the compressor 10 and then supplied to the recondenser 20 for processing.
  • the boil-off gas is recondensed in the recondenser 20 by receiving cooling heat from the supercooled LNG supplied by the pump P from the storage tank T and processed.
  • the condensed gas may be treated by recondensing with cold heat supplied from LNG.
  • the amount of LNG to be regasified is small, sufficient cold heat may not be transmitted to the boiled gas.
  • the system shown in FIG. 2 is an improved boil-off gas treatment system for solving this problem, and a boil-off gas treatment system according to one embodiment of the present invention is schematically illustrated.
  • the system shown in FIG. 2 is a system for treating boil-off gas generated in an LNG storage tank T of a ship or an offshore structure.
  • the system of the present embodiment re-gasifies LNG stored in an LNG storage tank T, thereby recovering natural gas. It includes a regasification line (L1) for supplying a gas, the regasification line (L1) is a high pressure pump 200 for receiving and compressing the LNG supplied from the recondenser (recondenser, 100), and the high pressure pump 200 A vaporizer 300 for vaporizing LNG is provided, and natural gas regasified at high pressure is supplied to the land via the high pressure pump 200 and the vaporizer 300 (GS).
  • L1 for supplying a gas
  • the regasification line (L1) is a high pressure pump 200 for receiving and compressing the LNG supplied from the recondenser (recondenser, 100)
  • the high pressure pump 200 A vaporizer 300 for vaporizing LNG is provided, and natural gas regasified at high pressure is supplied to the land
  • the high-pressure compression to compress the boil-off gas generated in the LNG storage tank (T) to a high pressure to supply downstream of the regasification line (L1) Line L2.
  • the high pressure compression line (L2) is provided with a high pressure compressor 400 for receiving the boil-off gas from the LNG storage tank (T) and compresses it to a high pressure, the boil-off gas compressed to high pressure in the high pressure compressor 400 is regasification line (L1) Is supplied downstream of the vaporizer 300.
  • the boil-off gas may be compressed by the supply pressure of the natural gas supplied to the land via the high-pressure pump 200 and the vaporizer 300.
  • supplying it downstream of the vaporizer 300 may further heat the regasified natural gas, thereby reducing the required amount of heat source of the vaporizer 300.
  • the regasification line L1 is provided with a recondenser 100 for receiving supercooled LNG from the LNG storage tank T, and compresses the evaporated gas generated in the LNG storage tank T to low pressure.
  • the low pressure condensation line (L3) to supply to the recondenser 100 is included in the system, it can be condensed by heat exchange with the low-pressure compressed boil-off gas and supercooled LNG introduced into the recondenser 100.
  • the low pressure condensation line (L3) is provided with a low pressure compressor (500) for receiving the boil-off gas from the LNG storage tank (T) and compresses to low pressure and supplies it to the recondenser (100), the LNG storage tank (T) is LNG supply pump (P) is provided to pump the LNG to supply to the recondenser 100 in a supercooled state.
  • a low pressure compressor 500 for receiving the boil-off gas from the LNG storage tank (T) and compresses to low pressure and supplies it to the recondenser (100)
  • the LNG storage tank (T) is LNG supply pump (P) is provided to pump the LNG to supply to the recondenser 100 in a supercooled state.
  • Treatment of the boil-off gas through the high pressure compression line (L2) and the low-pressure condensation line (L3) may be performed at the same time, or may be selected from the two depending on the amount of boil-off gas and the amount of LNG to be regasified.
  • the low-pressure condensation line L3 is used to recondense and treat the boil-off gas, and If the amount is small, the high-pressure compression line (L2) to compress the boil-off gas can be treated to supply directly to the land with the regasified natural gas.
  • the high-pressure compressor 400 compresses the evaporated gas generated in the LNG storage tank to a low pressure and mixes it with LNG to be regasified in the recondenser 100. While re-condensing with the cold heat of the supercooled LNG, while the re-condensed by the cold heat of LNG is condensed through the high-pressure compressor (400) and supplied to the vaporizer downstream of the regasification line to supply to the land with natural gas. Treatment can effectively treat the evaporated gas while reducing power consumption.
  • the compression pressure of the high pressure pump 300 and the high pressure compressor 400 of the high pressure compression line L2 is 50 to 100 bar
  • the compression pressure of the low pressure compressor 500 of the low compression line L3 is 2 to 10 bar. Can be.
  • Such gas consumers C1, C2, C3 may be, for example, gas engines such as dual fuel diesel electric (DFDE) engines, tri fuel diesel electric (TFDE) engines, and ME-GI engines.
  • DFDE dual fuel diesel electric
  • TFDE tri fuel diesel electric
  • ME-GI engines gas engines such as dual fuel diesel electric (DFDE) engines, tri fuel diesel electric (TFDE) engines, and ME-GI engines.
  • the present embodiment is a method of treating boil-off gas generated in an LNG storage tank T of a ship or an offshore structure, and regasifies LNG stored in the LNG storage tank T to bring natural gas to land. While supplying, the boil-off gas generated in the LNG storage tank (T) is compressed to high pressure and supplied to the land with regasified natural gas for treatment.
  • the boil-off gas generated in the LNG storage tank T may be compressed to low pressure, mixed with LNG to be regasified, and recondensed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

La présente invention concerne un système et un procédé permettant de traiter un gaz d'évaporation. Un système de traitement de gaz d'évaporation, qui est généré dans un réservoir de stockage de GNL dans un navire ou une structure marine, selon la présente invention, comprend : une conduite de regazéification pour la fourniture de gaz naturel en regazéifiant du GNL stocké dans le réservoir de stockage de GNL ; et une conduite de compression à haute pression permettant de comprimer le gaz d'évaporation généré dans le réservoir de stockage de GNL à une haute pression et de le fournir à un point en aval de la conduite de regazéification.
PCT/KR2015/001546 2014-02-24 2015-02-16 Système et procédé permettant de traiter un gaz d'évaporation WO2015126119A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201580010000.2A CN106029490B (zh) 2014-02-24 2015-02-16 用于处理蒸发气体的系统和方法
SG11201607024RA SG11201607024RA (en) 2014-02-24 2015-02-16 System and method for processing boil-off gas
JP2016553528A JP6366727B2 (ja) 2014-02-24 2015-02-16 蒸発ガスの処理システム及びその方法

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KR1020140021094A KR101788749B1 (ko) 2014-02-24 2014-02-24 증발가스 처리 시스템 및 방법
KR10-2014-0021094 2014-02-24

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WO (1) WO2015126119A1 (fr)

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JP6876826B2 (ja) * 2017-01-02 2021-05-26 サムスン・ヘヴィー・インダストリーズ・カンパニー・リミテッド 燃料ガス供給システム
CN107940497A (zh) * 2017-11-01 2018-04-20 南通中远川崎船舶工程有限公司 Lng加注过程中自然蒸发燃气处理装置及处理方法
KR102387172B1 (ko) * 2017-12-29 2022-04-15 대우조선해양 주식회사 액화가스 재기화 시스템의 증발가스 처리 장치 및 방법

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SG11201607024RA (en) 2016-10-28
JP2017511767A (ja) 2017-04-27
JP6366727B2 (ja) 2018-08-01
KR20150099929A (ko) 2015-09-02
CN106029490A (zh) 2016-10-12
KR101788749B1 (ko) 2017-10-20

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