WO2015126116A1 - 증발가스 처리 시스템 및 방법 - Google Patents
증발가스 처리 시스템 및 방법 Download PDFInfo
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- WO2015126116A1 WO2015126116A1 PCT/KR2015/001539 KR2015001539W WO2015126116A1 WO 2015126116 A1 WO2015126116 A1 WO 2015126116A1 KR 2015001539 W KR2015001539 W KR 2015001539W WO 2015126116 A1 WO2015126116 A1 WO 2015126116A1
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- gas
- boil
- compressed
- storage tank
- heat exchanger
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
- F25J1/0025—Boil-off gases "BOG" from storages
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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
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- 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
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- 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
- F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
- F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
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- 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
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- 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
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- 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
- F02M21/0287—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers characterised by the transition from liquid to gaseous phase ; Injection in liquid phase; Cooling and low temperature storage
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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
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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
- F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
- F17C9/04—Recovery of thermal energy
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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
- 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
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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
- 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
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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
- 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
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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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
- F17C2223/042—Localisation of the removal point
- F17C2223/043—Localisation of the removal point in the gas
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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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
- F17C2223/042—Localisation of the removal point
- F17C2223/046—Localisation of the removal point in the liquid
- F17C2223/047—Localisation of the removal point in the liquid with a dip tube
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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
- 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
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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
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
- F17C2225/035—High pressure, i.e. between 10 and 80 bars
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0302—Heat exchange with the fluid by heating
- F17C2227/0309—Heat exchange with the fluid by heating using another fluid
- F17C2227/0316—Water heating
- F17C2227/0318—Water heating using seawater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0367—Localisation of heat exchange
- F17C2227/0388—Localisation of heat exchange separate
- F17C2227/0393—Localisation of heat exchange separate using a vaporiser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/02—Mixing fluids
- F17C2265/022—Mixing fluids identical fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
- F17C2265/037—Treating the boil-off by recovery with pressurising
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/05—Regasification
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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
- 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
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- 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 a compressor for compressing the boil-off gas generated in a storage tank provided in a vessel or offshore structure, and the boil-off gas provided downstream of the compressor is sea water or fresh water and A compressed gas heat exchanger and a boil-off gas heat exchanger provided downstream of the compressed gas heat exchanger and the compressed boil-off gas is heat-exchanged with the boil-off gas to be introduced into the compressor.
- 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.
- the compressor for compressing the boil-off gas generated in the storage tank provided in the ship or offshore structure
- a compressed gas heat exchanger provided downstream of the compressor, wherein the compressed boil-off gas is heat-exchanged with sea water or fresh water;
- a boil-off gas treatment system is provided downstream of the compressed gas heat exchanger and includes an boil-off gas heat exchanger in which the compressed boil-off gas is heat-exchanged with the boil-off gas to be introduced into the compressor.
- a recondenser for recondensing the boil-off gas compressed in the compressor, a compressed gas supply line connected to the re-condenser downstream of the compressor and provided with the compressed gas heat exchanger and the boil-off gas heat exchanger, compressed
- the apparatus may further include a bypass line branched from the compressed gas supply line downstream of the compressed gas heat exchanger to bypass the boil-off gas heat exchanger to be introduced into the recondensate.
- a first control valve provided after the branch point of the bypass line in the compressed gas supply line, and a second control valve provided in the bypass line, the first and second control valve
- the liquefied natural gas supply line for supplying the liquefied natural gas supercooled from the storage tank to the recondensation, and the transfer pump provided in the storage tank for pumping the liquefied natural gas to the liquefied natural gas supply line further It may include.
- the apparatus may further include a high pressure pump provided downstream of the recondenser to compress the liquefied natural gas, and a vaporizer for receiving and vaporizing the liquefied natural gas compressed from the high pressure pump.
- a high pressure pump provided downstream of the recondenser to compress the liquefied natural gas
- a vaporizer for receiving and vaporizing the liquefied natural gas compressed from the high pressure pump.
- the gas may further include a gas line for supplying the boil-off gas branched from the compressed gas supply line downstream of the compressed gas heat exchanger and compressed to the gas consumer of the ship or offshore structure.
- the compressor when the temperature of the boil-off gas generated in the storage tank is high to mix the liquefied natural gas of the storage tank with the boil-off gas to cool the boil-off gas to be introduced into the compressor It may further include an in-line mixer.
- the vessel or offshore structure may include a regasification vessel (LNG-RV) and a floating storage and regasification unit (LNG-FSRU).
- LNG-RV regasification vessel
- LNG-FSRU floating storage and regasification unit
- the compressed boil-off gas is provided, wherein the boil-off gas treatment method can be cooled by heat exchange with the boil-off gas to be generated and compressed in the storage tank.
- the boil-off gas treatment system of the present invention compresses and cools the boil-off gas generated in the storage tank of a ship or offshore structure and recondenses it with the cold heat of the supercooled liquefied natural gas from the storage tank, but compresses the compressed boil-off gas in the storage tank. Generated and cooled by heat exchange with the boil-off gas to be compressed.
- the compressed boil-off gas is cooled with sea water or fresh water in the compressed gas heat exchanger, and further cooled with boil-off gas to be introduced into the compressor and introduced into the recondenser, thereby increasing the efficiency of condensation of the boil-off gas in the recondenser.
- 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 a boil-off gas is generated from the storage tank by providing an LNG storage tank.
- LNG-RV (Regasification) for supplying natural gas to the land by regasifying LNG It can be applied to a vessel and a floating storage regasification unit (LNG-FSRU).
- 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 liquefied natural gas is pumped from the storage tank T to the recondenser 20, and the pump 40 and the vaporizer 50 are compressed to a high pressure, and the land is used. While supplying the natural gas, the evaporated gas generated in the storage tank T is compressed by the compressor 10 and then supplied to the recondenser 20 for processing.
- the boil-off gas is supplied from the supercondensed liquefied natural gas supplied from the storage tank T by the pump 30 from the recondenser 20 to be recondensed and then supplied to the pump 40 in a liquid state.
- 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 boil-off gas treatment system of the present embodiment includes a compressor 100 for compressing boil-off gas generated in a storage tank T provided in a ship or an offshore structure, and provided downstream of the compressor 100.
- the compressed gas heat exchanger 300 is a heat exchanged with the sea water or fresh water and the evaporated gas is provided downstream of the compressed gas heat exchanger 300, and the compressed boil-off gas is exchanged with the boil-off gas to be introduced into the compressor 100.
- a gas heat exchanger 200 and a recondenser 400 for recondensing the boil-off gas compressed by the compressor 100.
- a compressed gas heat exchanger 300 and an evaporative gas heat exchanger 200 are provided in the compressed gas supply line GL connected to the recondenser 400 from the downstream of the compressor 100, and the compressed gas heat exchanger 300 is provided.
- a bypass line BL branching downstream from the compressed gas supply line GL is provided so that the boil-off gas compressed through the bypass line BL bypasses the boil-off gas heat exchanger 200 to recondenser 400. Can be introduced.
- the first control valve 430 is provided at the compressed gas supply line GL after the branch point of the bypass line BL, and the second control valve 450 is provided at the bypass line BL.
- the first and second control valves 430 and 450 are controlled to control the flow rate of the compressed boil-off gas flowing into the recondenser 400 through the compressed gas supply line GL and the bypass line BL, respectively. As a result, the temperature of the compressed boil-off gas introduced into the recondenser 400 may be adjusted.
- the first control valve 430 is blocked to pass the entire amount of the compressed boil-off gas without passing through the boil-off gas heat exchanger 200. ) Can be supplied to the recondenser 400.
- the compressed boil-off gas may be recondensed without passing through the boil-off gas heat exchanger 200, and evaporated before being introduced into the compressor 100. Since the gas is not heated through heat exchange in the boil-off gas heat exchanger 200, the temperature of the boil-off gas compressed downstream of the compressor 100 is lowered, thereby reducing the load of the compressed gas heat exchanger 300.
- the temperature of the boil-off gas generated in the storage tank (T) is about -120 ° C
- the boil-off gas compressed by the compressor 100 passes through the compressed gas heat exchanger 300 and then passes through the boil-off gas heat exchanger 200 It may be cooled to -50 to -100 °C to be introduced into the recondenser 400.
- the boil-off gas generated in the storage tank T through heat exchange with the compressed boil-off gas is introduced into the compressor 100 at an elevated temperature, compressed through the compressor 100, and compressed with sea water or fresh water of about 10 to 40 ° C. After being cooled in the compressed gas heat exchanger 300 through heat exchange, it is further cooled in the boil-off gas heat exchanger 200.
- the liquefied natural gas supercooled from the storage tank T is supplied to the recondenser 400 through the liquefied natural gas supply line LL, and the storage tank T is supplied to the liquefied natural gas supply line LL for this purpose.
- a transfer pump 500 for pumping liquefied natural gas is provided.
- the compressed and cooled boil-off gas is mixed with the supercooled liquefied natural gas and recondensed into a liquid liquefied natural gas.
- Downstream of the recondenser 400 is provided with a high pressure pump 600 and a vaporizer 700, the liquefied natural gas supplied from the recondenser 400 is compressed and then vaporized and natural gas is supplied to the land (G).
- the boil-off gas compressed by branching the gas line SL from the compressed gas supply line GL downstream of the compressed gas heat exchanger 300 may be supplied to the gas consumers S1, S2 and S3 of the ship or offshore structure.
- gas consumers include gas engines such as DFDE or DFDG, boilers, gas compression units (GCUs), and the like.
- the pressure at the rear of the compressor 100 may be 5 to 10 bara, preferably 6 to 7 bara, and 4.5 to 6 bara (3 to 5.5 barg) in the recondenser 400. have.
- the boil-off gas generated from the storage tank T is first supplied to and consumed by the gas consumers S1, S2, and S3 in the ship or offshore structure through the gas line SL, and the remaining boil-off gas is sent to the recondenser 400.
- the system can be operated to recondense to subcooled LNG.
- an in-line mixer (not shown) may be provided upstream of the compressor 100.
- the liquefied natural gas in the storage tank (T) is mixed with the boil-off gas by the in-line mixer to the compressor 100.
- the boil-off gas to be introduced may be cooled and then supplied to the compressor.
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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)
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- Thermal Sciences (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims (9)
- 선박 또는 해상 구조물에 마련된 저장탱크에서 발생하는 증발가스를 압축하는 압축기;상기 압축기의 하류에 마련되어 압축된 상기 증발가스가 해수 또는 청수와 열교환되는 압축가스 열교환기; 및상기 압축가스 열교환기의 하류에 마련되며 압축된 상기 증발가스가 상기 압축기로 도입될 증발가스와 열교환되는 증발가스 열교환기;를 포함하는, 증발가스 처리 시스템.
- 제 1항에 있어서,상기 압축기에서 압축된 상기 증발가스를 재응축시키는 재응축기;상기 압축기의 하류에서 상기 재응축기로 연결되며 상기 압축가스 열교환기 및 상기 증발가스 열교환기가 마련되는 압축가스 공급라인; 및압축된 상기 증발가스가 상기 증발가스 열교환기를 바이패스하여 상기 재응축기로 도입되도록 상기 압축가스 열교환기의 하류에서 상기 압축가스 공급라인으로부터 분기되는 바이패스 라인;을 더 포함하는, 증발가스 처리 시스템.
- 제 2항에 있어서,상기 압축가스 공급라인에서 상기 바이패스 라인의 분기점 이후에 마련되는 제1 제어밸브; 및상기 바이패스 라인에 마련되는 제2 제어밸브;를 더 포함하며,상기 제1 및 제2 제어밸브를 제어하여 상기 재응축기로 유입되는 압축된 상기 증발가스의 온도를 조절할 수 있는 것을 특징으로 하는, 증발가스 처리 시스템.
- 제 2항에 있어서,상기 저장탱크로부터 상기 재응축기로 과냉된 액화천연가스를 공급하는 액화천연가스 공급라인; 및상기 저장탱크에 마련되어 상기 액화천연가스 공급라인으로 상기 액화천연가스를 펌핑하는 이송펌프;를 더 포함하는, 증발가스 처리 시스템.
- 제 4항에 있어서,상기 재응축기의 하류에 마련되어 상기 액화천연가스를 압축하는 고압펌프; 및상기 고압펌프로부터 압축된 상기 액화천연가스를 공급받아 기화시키는 기화기;를 더 포함하는, 증발가스 처리 시스템.
- 제 2항에 있어서,상기 압축가스 열교환기의 하류에서 상기 압축가스 공급라인으로부터 분기되어 압축된 상기 증발가스를 상기 선박 또는 해양구조물의 가스 소비처로 공급하는 가스 라인을 더 포함하는, 증발가스 처리 시스템.
- 제 1항에 있어서,상기 압축기의 상류에 마련되어, 상기 저장탱크에서 발생하는 상기 증발가스의 온도가 높을 경우 상기 저장탱크의 액화천연가스를 상기 증발가스에 혼합하여 상기 압축기로 도입될 상기 증발가스를 냉각하는 인라인 믹서(in-line mixer)를 더 포함하는, 증발가스 처리 시스템.
- 제 1항에 있어서,상기 선박 또는 해양구조물은 LNG-RV(Regasification Vessel) 및 LNG-FSRU(Floating Storage and Regasification Unit) 중 어느 하나인, 증발가스 처리 시스템.
- 1) 선박 또는 해상 구조물에 마련된 저장탱크에서 발생하는 증발가스를 압축하는 단계;2) 압축된 상기 증발가스를 냉각하는 단계; 및3) 압축 및 냉각된 상기 증발가스에 상기 저장탱크로부터 과냉된 액화천연가스를 공급하여 재응축하는 단계;를 포함하되,상기 단계 2)에서 상기 압축된 증발가스는, 상기 저장탱크에서 발생하여 압축될 증발가스와 열교환으로 냉각될 수 있는 것을 특징으로 하는, 증발가스 처리 방법.
Priority Applications (4)
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US15/121,003 US20170067685A1 (en) | 2014-02-24 | 2015-02-16 | System and method for processing boil-off gas |
JP2016570750A JP6334004B2 (ja) | 2014-02-24 | 2015-02-16 | 蒸発ガス処理システム及び方法 |
EP15752537.9A EP3112248A4 (en) | 2014-02-24 | 2015-02-16 | System and method for processing boil-off gas |
CN201580010007.4A CN106061829B (zh) | 2014-02-24 | 2015-02-16 | 用于处理蒸发气体的系统和方法 |
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KR1020140021095A KR101726668B1 (ko) | 2014-02-24 | 2014-02-24 | 증발가스 처리 시스템 및 방법 |
KR10-2014-0021095 | 2014-02-24 |
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US (1) | US20170067685A1 (ko) |
EP (1) | EP3112248A4 (ko) |
JP (1) | JP6334004B2 (ko) |
KR (1) | KR101726668B1 (ko) |
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CN110997474A (zh) * | 2017-07-31 | 2020-04-10 | 大宇造船海洋株式会社 | 蒸发气体再液化系统、用于排放蒸发气体再液化系统中的润滑油的方法以及发动机燃料供应方法 |
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JP6815213B2 (ja) * | 2017-01-30 | 2021-01-20 | 株式会社神戸製鋼所 | ボイルオフガス回収システム |
FR3066248B1 (fr) * | 2017-05-12 | 2020-12-11 | Gaztransport Et Technigaz | Procede et systeme de traitement de gaz d'une installation de stockage de gaz pour un navire de transport de gaz |
KR101957322B1 (ko) * | 2017-07-31 | 2019-03-12 | 대우조선해양 주식회사 | 증발가스 재액화 시스템 및 증발가스 재액화 시스템 내의 윤활유 배출 방법 |
KR101852132B1 (ko) * | 2017-09-21 | 2018-04-25 | (주)발맥스기술 | 액화천연가스 공급 시스템 |
US10961109B2 (en) * | 2018-11-16 | 2021-03-30 | China Energy Investment Corporation Limited | Fluid bypass method and system for controlling the temperature of a non-petroleum fuel |
CN109404079A (zh) * | 2018-11-27 | 2019-03-01 | 大连理工大学 | 一种用于lng接收站的bog再冷凝与lng冷能发电集成系统 |
CN109812357B (zh) * | 2019-01-25 | 2020-08-18 | 太平洋海洋工程(舟山)有限公司 | 一种柴油和天然气双燃料发电系统 |
KR102267481B1 (ko) * | 2019-09-06 | 2021-06-22 | 한국조선해양 주식회사 | 가스 처리 시스템 및 이를 포함하는 선박 |
KR20230154381A (ko) * | 2022-04-29 | 2023-11-08 | 에이치디한국조선해양 주식회사 | 가스 처리 시스템을 포함하는 선박 |
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Also Published As
Publication number | Publication date |
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EP3112248A4 (en) | 2017-12-06 |
CN106061829A (zh) | 2016-10-26 |
JP2017507079A (ja) | 2017-03-16 |
KR101726668B1 (ko) | 2017-04-13 |
JP6334004B2 (ja) | 2018-05-30 |
CN106061829B (zh) | 2018-06-08 |
US20170067685A1 (en) | 2017-03-09 |
EP3112248A1 (en) | 2017-01-04 |
KR20150099930A (ko) | 2015-09-02 |
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