WO2012153886A1 - Dispositif de reliquéfaction utilisant du gaz naturel liquéfié et système d'alimentation de combustible de gaz naturel - Google Patents

Dispositif de reliquéfaction utilisant du gaz naturel liquéfié et système d'alimentation de combustible de gaz naturel Download PDF

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Publication number
WO2012153886A1
WO2012153886A1 PCT/KR2011/003643 KR2011003643W WO2012153886A1 WO 2012153886 A1 WO2012153886 A1 WO 2012153886A1 KR 2011003643 W KR2011003643 W KR 2011003643W WO 2012153886 A1 WO2012153886 A1 WO 2012153886A1
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Prior art keywords
natural gas
reliquefaction
storage tank
vapor
liquid
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Ceased
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PCT/KR2011/003643
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English (en)
Korean (ko)
Inventor
전정도
김병수
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YUYOUNG METAL CO Ltd
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YUYOUNG METAL CO Ltd
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Publication of WO2012153886A1 publication Critical patent/WO2012153886A1/fr
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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
    • 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
    • F02M21/0224—Secondary gaseous fuel storages
    • 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 natural gas fuel supply system including a reliquefaction apparatus and a reliquefaction apparatus using liquefied natural gas, and more particularly, a reliquefaction apparatus for reliquefying a natural gas vapor (Boiled off gas, BOG) in a storage tank;
  • a natural gas fuel supply system comprising a reliquefaction unit.
  • LNG liquid natural gas
  • NG natural gas
  • NBOG low-temperature natural gas vapor
  • FBOG forced vaporized natural vapor
  • Liquid natural gas is stored and transported in a liquid state in a storage tank because it can store more than the gaseous state at once.
  • liquid natural gas is stored in a cryogenic liquid state in a storage tank, pressurized with a high pressure pump and vaporized in a vaporizer, and the vaporized gas is heated in a gas heater and consumed as a high pressure gas at a constant temperature through a pipe. Supplied to the sieve.
  • the natural gas supply system is often unable to re-liquefy the natural gas vapor (BOG) in the storage tank, even in the case of re-liquefying natural gas vapor, natural gas vapor to be substantially liquefied
  • the liquid natural gas (LNG) to be circulated with respect to the unit amount of the excessive supply or a large amount of power for heat exchange.
  • the natural gas supply system according to the prior art was not able to store the reliquefied liquefied natural gas in the storage tank, even if the natural gas vapor liquefied, there was a problem that must be forcibly consumed.
  • An object of the present invention is to provide a reliquefaction unit capable of reliquefying natural gas vapor generated in a storage tank for storing liquid natural gas, thereby reusing the reliquefied liquefied natural gas while maintaining the pressure inside the storage tank.
  • the present invention provides a natural gas fuel supply system including a reliquefaction apparatus and a reliquefaction apparatus using liquefied natural gas.
  • Another object of the present invention is to use a liquid natural gas itself as a refrigerant to re-liquefy the natural gas vapor without the need for a separate refrigerant material, including a reliquefaction and reliquefaction using liquefied natural gas that can realize environmental protection To provide a natural gas fuel supply system.
  • Another object of the present invention is to re-liquefy a natural gas vapor and to re-liquefy the natural gas vapor by using a re-liquefier having a significantly increased contact area in order to increase the efficiency for re-liquefying natural gas vapor It is to provide a natural gas fuel supply system including a fire.
  • Another object of the present invention is connected to a plurality of storage tanks, while maintaining the internal pressure of the storage tank, including natural reliquefaction and reliquefaction using liquefied natural gas that can reuse the liquefied natural gas To provide a gas fuel supply system.
  • Natural gas fuel supply system for achieving the above object, to increase the pressure of the liquid natural gas and the storage tank in which the natural gas vapor is stored in the upper layer, and the liquid natural gas transferred from the storage tank It includes a pressurizer, an expansion valve provided with natural gas vapor from a storage tank, into which a natural gas at high pressure is introduced by the pressurizer, and a natural gas vapor reliquefaction pipe for guiding the liquid natural gas to expand inside the reliquefaction machine. But includes a reliquefaction unit for reliquefaction of natural gas vapor.
  • the reliquefaction device is to receive and store the natural gas vapor generated by the vaporization of the liquefied natural gas from the external storage tank for storing the liquefied natural gas, the high pressure according to the pressurized natural gas
  • a natural gas fuel supply system including a reliquefaction unit and a reliquefaction unit to reliquefy natural gas vapor (Boiled off gas, BOG) in a storage tank using a liquefied natural gas.
  • BOG natural gas vapor
  • the present invention is a technology capable of re-liquefying natural gas vapor and forced vaporized natural gas vapor in the storage tank, it can be used in a vaporization facility using a natural gas of a vessel or a terminal fueled by liquefied natural gas as fuel.
  • the present invention has the advantage of using the liquefied natural gas for the reliquefaction of natural gas vapor, it is possible to reduce the operating cost and environmental pollution caused by the use of conventional refrigerant.
  • FIG. 1 is a view for explaining a natural gas fuel supply system including a reliquefaction machine and a reliquefaction machine using liquefied natural gas according to an embodiment of the present invention.
  • FIG. 2 is a view for explaining a natural gas fuel supply system including a reliquefaction apparatus according to another embodiment of the present invention.
  • FIG 3 is a view for explaining a natural gas fuel supply system including a reliquefaction apparatus according to another embodiment of the present invention.
  • FIG. 4 is a view for explaining a natural gas fuel supply system including a reliquefaction apparatus according to another embodiment of the present invention.
  • the best natural gas fuel supply system for the practice of the present invention is a liquid tank and a storage tank in which the natural gas vapor is stored in the upper layer; A pressurizer for increasing the pressure of the liquid natural gas transferred from the storage tank; And an expansion valve provided with the natural gas vapor from the storage tank, into which the natural gas at a high pressure is introduced by the pressurizer, and a natural gas vapor reliquefaction pipe that guides the liquid natural gas to expand inside the reliquefaction unit. Including, but including a re-liquefaction to re-liquefy the natural gas vapor.
  • the natural gas fuel supply system may further include a pump connected to one end of the storage tank, the other end is connected to the pressurizer so that the liquid natural gas in the storage tank can be discharged.
  • the storage tank comprises a plurality of storage tanks connected along a pipe in parallel
  • the pressurizer increases the pressure of the liquid natural gas transferred from at least one storage tank of the plurality of storage tanks
  • the reliquefaction unit receives the natural gas vapor from at least one of the plurality of storage tanks of the plurality of storage tanks, an expansion valve into which the liquid natural gas that has become a high pressure state by the pressurizer, and the liquid natural gas Natural gas vapor reliquefaction pipe for liquefying the natural gas vapor by guiding the gas to expand inside the reliquefaction unit, and liquefied natural gas according to the reliquefaction of the natural gas vapor into at least one storage tank of the plurality of storage tanks. It may be to include a pipe for transferring.
  • the natural gas fuel supply system is one end is connected to the pressurizer, the other end is connected to the re-liquefaction, to control the flow rate of the liquid natural gas in the high pressure state is transferred from the pressurizer to the re-liquefaction Control valves;
  • a pressure gauge formed at one side of a pipe through which the vaporized natural gas generated by the heat exchange process in the reliquefaction device passes, wherein the control valve is in the high pressure state according to the pressure measured by the pressure gauge. It may be to adjust the flow rate of the gas.
  • the best reliquefaction apparatus for the practice of the present invention is to receive and store the natural gas vapor generated by the vaporization of the liquefied natural gas from an external storage tank for storing the liquefied natural gas, but the high pressure according to the pressurization of the liquefied natural gas Expansion valve into which the liquefied natural gas flows;
  • a natural gas vapor reliquefaction pipe that guides the liquefied natural gas to expand to reliquefy the natural gas vapor through heat exchange; Piping for transferring the liquefied natural gas according to the reliquefaction of the natural gas steam to the storage tank;
  • the reliquefaction unit is connected to a plurality of storage tanks for storing the liquefied natural gas
  • the expansion valve is at least one of the plurality of storage tanks
  • the liquefied natural gas is introduced, and the pipe for transferring to the storage tank may be to transfer the liquefied natural gas according to the reliquefaction of the natural gas vapor to at least one storage tank of the plurality of storage tanks.
  • FIG. 1 is a view for explaining a natural gas fuel supply system including a reliquefaction machine and a reliquefaction machine using liquefied natural gas according to an embodiment of the present invention.
  • the reliquefaction device 30 using liquefied natural gas includes an expansion valve 31 into which liquid natural gas in a high pressure state is introduced, and a liquid natural gas reliquefaction device 30.
  • Natural gas vapor reliquefaction piping to guide expansion therein. Meanwhile, the expansion valve 31 and the natural gas vapor reliquefaction pipe are formed inside the reliquefaction unit 30 to reliquefy the natural gas vapor.
  • the reliquefaction unit 30 may include a pipe and a control valve through which natural gas vapor is introduced from the storage tank 10, and the like, and a pipe and a control for transferring the reliquefied liquefied natural gas to the storage tank 10. It may include a valve.
  • the reliquefaction unit 30 may include a cooling fin or a cooling plate formed around the natural gas vapor reliquefaction pipe to increase a heat exchange area with the natural gas vapor.
  • Natural gas fuel supply system includes a storage tank 10, the pressurizer 20 and the reliquefaction machine (30).
  • the storage tank 10 stores the liquid natural gas 13, and in the storage tank 10, the natural gas vapor 12 may be present in an upper layer where the liquid natural gas 13 is stored.
  • one side of the storage tank 10 may be provided with a pipe and a valve so that the liquid natural gas 13 can be discharged, the upper side of the storage tank 10 may be a natural gas vapor 12 is discharged It may be provided with a natural gas steam outlet.
  • the pressurizer 20 receives the liquid natural gas in the storage tank 10 to increase the pressure of the liquid natural gas.
  • the reliquefaction unit 30 includes an expansion valve 31 into which the high pressure liquid natural gas from the pressurizer 20 flows, and a natural gas vapor reliquefaction pipe that guides the liquid natural gas to expand inside the reliquefaction unit 30. It includes.
  • the reliquefaction unit 30 may include a pipe and a control valve through which natural gas vapor is introduced, and may receive natural gas vapor from the storage tank 10.
  • the reliquefaction unit 30 may include a pipe and a control valve for transferring the reliquefied liquefied natural gas to the storage tank 10, and may provide the reliquefied liquefied natural gas to the storage tank 10,
  • the liquefied natural gas can be reused with the liquefied natural gas 13 stored in the storage tank 10.
  • the reliquefaction unit 30 may include a cooling fin or a cooling plate formed around the natural gas vapor reliquefaction pipe to increase the heat exchange area with the natural gas vapor, and the heat exchange efficiency is improved by the cooling fin or the cooling plate. Can be maximized.
  • the operation principle of the natural gas fuel supply system including a reliquefaction machine and a reliquefaction machine using liquefied natural gas according to an embodiment of the present invention.
  • the storage tank 10 may store the natural gas 13 and the natural gas vapor 12 at an upper position of the liquid natural gas.
  • one side of the storage tank 10 may include a pipe and a valve, the other end of the valve is connected to the pressurizer 20, this pressurizer 20 is a storage tank
  • the liquid natural gas transferred from 10 is pressurized.
  • the high pressure liquid natural gas that has passed through the pressurizer 20 undergoes an expansion process in the reliquefaction apparatus 30 starting from the expansion valve 31.
  • the reliquefaction unit 30 includes a pipe and a control valve into which the natural gas vapor is introduced, and receives natural gas vapor from the storage tank 10.
  • the high-pressure liquid natural gas and the storage tank through the pressurizer 20 The natural gas vapor is reliquefied through heat exchange of the natural gas vapor provided from 10).
  • the liquid natural gas in the expansion process made in the reliquefaction apparatus 30 is lowered in pressure, receives the heat of evaporation from the outside, and undergoes a phase change process in the gas state.
  • the most characteristic feature of the natural gas fuel supply system including a reliquefaction system and a reliquefaction system using liquefied natural gas is a reliquefaction unit capable of reliquefying natural gas steam using the Jules Thompson effect.
  • the natural gas vapor 12 in the storage tank 10 is in a gaseous state
  • the pressure inside the storage tank 10 is high and a temperature slightly higher than the boiling point under the pressure, so that it is easy in the reliquefaction device 30.
  • It can be condensation (condensation)
  • the natural gas fuel supply system including the reliquefaction machine 30 and the reliquefaction using the liquefied natural gas according to an embodiment of the present invention stores the reliquefied liquefied natural gas due to the condensation It is provided to the tank 10, so that the liquefied natural gas with the liquefied natural gas 13 stored in the storage tank 10 can be reused.
  • the natural gas fuel supply system including a reliquefaction machine and a reliquefaction machine using the liquefied natural gas includes a cooling fin or a cooling plate in the reliquefaction machine 30, the reliquefaction machine 30
  • the liquid natural gas (cooling heat source) flowing inside the tube and the natural gas vapor 12 outside the tube can cause heat exchange through a large cooling fin or cooling plate on the surface, and more efficiently re-liquefy the natural gas vapor. You can get angry.
  • natural gas fuel supply system including a reliquefaction machine according to an embodiment of the present invention BOG discharge unit 90, control valve 50, pressure gauge 60, the heater 80 and the heat source 70 It may further include to provide a liquid natural gas as a fuel more effectively.
  • the BOG discharge unit 90 may discharge natural gas vapor into the atmosphere. More specifically, the BOG discharge unit 90 may discharge the natural gas vapor pressure in the storage tank 10 to the atmosphere or discharge the gas from the safety valve when the pressure is too high.
  • the control valve 50 regulates the flow rate of the high pressure liquid natural gas transferred from the pressurizer 20 to the reliquefaction unit 30.
  • the pressure gauge 60 the pressure of the vaporized natural gas that is moved from the reliquefaction apparatus 30 to the heater 80 is measured. Meanwhile, the control valve 50 may be controlled based on the pressure signal measured by the pressure gauge 60.
  • valve opening of the control valve 50 is closed by a predetermined amount, and in the case of low pressure, the valve opening is slightly opened to adjust the amount of liquid natural gas supplied to the reliquefaction device 30. Can be.
  • the energy supplied from the heat source 70 is applied to the vaporized natural gas in a low temperature state, and the vaporized natural gas supplied with the thermal energy is moved to the place of use after being in a high pressure and high temperature state.
  • liquid natural gas in the reliquefaction device 30 may be provided to the warmer 80 after the liquid natural gas is in a vaporized or saturated liquid state (hereinafter referred to as vaporized natural gas).
  • FIG. 2 a natural gas fuel supply system including a reliquefaction device according to another embodiment of the present invention will be described with reference to FIG. 2. Meanwhile, the same reference numerals are used for components that perform the same functions as the components illustrated in FIG. 1, and a detailed description of the corresponding components will be omitted.
  • FIG. 2 is a view for explaining a natural gas fuel supply system including a reliquefaction apparatus according to another embodiment of the present invention, the pump 40 when the pressure of the natural gas vapor 12 in the storage tank 10 is low An embodiment in which the liquid natural gas is moved is shown.
  • the natural gas fuel supply system including the reliquefaction apparatus includes a storage tank 10, a pump 40, a pressurizer 20, and a reliquefaction apparatus 30.
  • the storage tank 10 stores the liquid natural gas 13, and in the interior of the storage tank 10, the natural gas vapor 12 may be present in an upper layer where the liquid natural gas 13 is stored.
  • a pipe and a valve are provided at one side of the storage tank 10 to discharge the liquid natural gas 13, and a natural gas at which the natural gas vapor 12 may be discharged at the upper side of the storage tank 10.
  • a steam outlet can be provided.
  • the pump 40 is connected to the other end of the valve to pump and pressurize the liquid natural gas.
  • the pressurizer 20 is connected to the outlet side of the pump 40, which pressurizer 20 further pressurizes the liquid natural gas transferred from the pump 40.
  • the pressurizer 20 receives the liquid natural gas in the storage tank 10 to increase the pressure of the liquid natural gas.
  • the reliquefaction unit 30 includes an expansion valve 31 into which the high pressure liquid natural gas from the pressurizer 20 flows, and a natural gas vapor reliquefaction pipe that guides the liquid natural gas to expand inside the reliquefaction unit 30. It includes.
  • the reliquefaction unit 30 may include a pipe and a control valve through which natural gas vapor is introduced, and may receive natural gas vapor from the storage tank 10.
  • the reliquefaction unit 30 may include a pipe and a control valve for transferring the reliquefied liquefied natural gas to the storage tank 10, and may provide the reliquefied liquefied natural gas to the storage tank 10,
  • the liquefied natural gas can be reused with the liquefied natural gas 13 stored in the storage tank 10.
  • FIG. 3 a natural gas fuel supply system including a reliquefaction device capable of connecting with a plurality of tanks will be described.
  • FIG 3 is a view for explaining a natural gas fuel supply system including a reliquefaction apparatus according to another embodiment of the present invention.
  • a natural gas fuel supply system including a reliquefaction device includes a plurality of storage tanks 10a, 10b, and 10z, and the reliquefaction device 30 includes a plurality of storage tanks. It is connected to the (10a, 10b, 10z) respectively to re-liquefy the natural gas vapor in the plurality of storage tank (10a, 10b, 10z).
  • the storage tanks 10a, 10b, 10z are connected in parallel to provide a liquid natural gas to the pressurizer 20 and the reliquefaction apparatus 30.
  • the pressurizer 20 receives the liquid natural gas in at least one of the plurality of storage tanks 10a, 10b, and 10z to increase the pressure of the liquid natural gas.
  • the reliquefaction unit 30 includes an expansion valve 31 into which the high pressure liquid natural gas from the pressurizer 20 flows, and a natural gas vapor reliquefaction pipe that guides the liquid natural gas to expand inside the reliquefaction unit 30. Including, liquefied natural gas vapor.
  • the reliquefaction unit 30 may include a pipe and a valve through which natural gas vapor is introduced, and may receive natural gas vapor from at least one storage tank among the plurality of storage tanks 10a, 10b, and 10z.
  • a compressor 21 for pressurizing the natural gas steam may be included in the pipe and valve through which the natural gas steam is introduced.
  • the compressor 21 has one end connected to the plurality of storage tanks 10a, 10b, and 10z, and the other end connected to the reliquefaction machine 30, and thus the plurality of storage tanks 10a, 10b, and 10z.
  • the natural gas vapor is provided from at least one of the storage tanks, and the natural gas vapor may be supplied to the reliquefaction unit 30 by pressurizing the natural gas vapor.
  • the reliquefaction liquid 30 includes a pipe and a control valve for transferring the reliquefied liquefied natural gas to at least one of the plurality of storage tanks (10a, 10b, 10z), the liquefied natural liquefied natural
  • the gas can be provided to the storage tank and the liquefied liquefied natural gas can be reused along with the liquefied natural gas stored inside the storage tank.
  • the storage tanks (10a, 10b, 10z) of the plurality of storage tanks (10a, 10b, 10z) in the order of the storage tank high natural gas vapor pressure in the storage tank The liquefied natural gas may be provided to the reliquefaction unit 30 via the pressurizer 20.
  • the reliquefaction unit 30 may reliquefy the natural gas vapor through heat exchange between the high pressure liquefied natural gas and the natural gas vapor provided from the plurality of storage tanks 10a, 10b, and 10z.
  • the BOG discharge unit 90 may discharge the natural gas vapor to the atmosphere. More specifically, the BOG discharge unit 90, when the natural gas vapor pressure in the storage tank of at least one of the plurality of storage tank (10a, 10b, 10z) is too high to discharge to the atmosphere or from the safety valve You can discharge the gas that comes out.
  • the natural gas of the storage tank of the high storage pressure of the natural gas vapor in the storage tank among the plurality of storage tanks (10a, 10b, 10z) Steam may be vented first.
  • the natural gas fuel supply system including a reliquefaction device according to another embodiment of the present invention, including a reliquefaction device connected to a plurality of storage tanks, while maintaining the internal pressure of the storage tanks, Liquefied natural gas can be reused.
  • FIG. 4 is a view for explaining a natural gas fuel supply system including a reliquefaction apparatus according to another embodiment of the present invention, the pressure of the natural gas vapor in the plurality of storage tanks (10a, 10b, 10z) is low In this case, the liquid natural gas is moved by using the pumps 41, 42, and 43 connected to each of the plurality of storage tanks 10a, 10b, and 10z.
  • a natural gas fuel supply system including a reliquefaction apparatus according to another embodiment of the present invention, a plurality of storage tanks (10a, 10b, 10z), pumps (41, 42, 43), pressurizer 20 ) And a reliquefaction machine (30).
  • the plurality of storage tanks 10a, 10b and 10z respectively store liquid natural gas, and in the plurality of storage tanks 10a, 10b and 10z, natural gas vapor may be present in an upper layer where the liquid natural gas is stored. .
  • pipes and valves are provided at one side of the plurality of storage tanks 10a, 10b, and 10z to discharge liquid natural gas, respectively, and natural gas vapor is provided at the upper side of the plurality of storage tanks 10a, 10b, and 10z.
  • Each may be provided with a natural gas steam outlet that can be discharged.
  • pumps 41, 42, and 43 corresponding to the plurality of storage tanks 10a, 10b, and 10z, respectively, are connected to the other end of the valve to simultaneously pump and pressurize the liquid natural gas.
  • the pressurizer 20 is connected to the outlets of the pumps 41, 42, and 43, and the pressurizer 20 further pressurizes the liquid natural gas transferred from the pumps 41, 42, and 43.
  • the pressurizer 20 receives the liquid natural gas inside at least one of the plurality of storage tanks 10a, 10b and 10z to increase the pressure of the liquid natural gas.
  • the reliquefaction unit 30 includes an expansion valve 31 into which the high pressure liquid natural gas from the pressurizer 20 flows, and a natural gas vapor reliquefaction pipe that guides the liquid natural gas to expand inside the reliquefaction unit 30. Including, liquefied natural gas vapor.
  • the reliquefaction unit 30 may include a pipe and a control valve through which natural gas steam is introduced, and may receive natural gas steam from at least one storage tank among the plurality of storage tanks 10a, 10b, and 10z.
  • the reliquefaction unit 30 may include a pipe and a valve through which natural gas vapor is introduced, and may receive natural gas vapor from at least one storage tank among the plurality of storage tanks 10a, 10b, and 10z.
  • a compressor 21 for pressurizing the natural gas steam may be included in the pipe and valve through which the natural gas steam is introduced.
  • the compressor 21 has one end connected to the plurality of storage tanks 10a, 10b, and 10z, and the other end connected to the reliquefaction machine 30, and thus the plurality of storage tanks 10a, 10b, and 10z.
  • the natural gas vapor is provided from at least one of the storage tanks, and the natural gas vapor may be supplied to the reliquefaction unit 30 by pressurizing the natural gas vapor.
  • the reliquefaction liquid 30 includes a pipe and a control valve for transferring the reliquefied liquefied natural gas to at least one of the plurality of storage tanks (10a, 10b, 10z), the liquefied natural liquefied natural The gas may be provided to the storage tank, and the liquefied liquefied natural gas may be reused together with the liquefied natural gas stored in the plurality of storage tanks 10a, 10b, and 10z.
  • the advantages of the natural gas fuel supply system including a reliquefaction apparatus and a reliquefaction apparatus using liquefied natural gas according to an embodiment of the present invention are as follows.
  • a natural gas fuel supply system including a reliquefaction system and a reliquefaction system using liquefied natural gas is a technology capable of reliquefying natural gas vapor and forced vaporized natural gas vapor in a storage tank. It can be used in LNG fueled vessels or in gasification facilities using natural gas in terminals.It can also be used in L.CNG filling stations that store natural gas and are used under high pressure gas. By controlling the risk of damage and there is an advantage that does not need a separate container or piping according to the fuel reliquefaction.
  • the L.CNG filling station is a station that stores liquid LNG and fills it in a liquid state, or fills it in a compressed gas state with a bus or a device or transportation machine using the same as a fuel.
  • the present invention also has the advantage of using the liquefied natural gas for the reliquefaction of natural gas steam, to reduce the operating cost and environmental pollution caused by the use of conventional refrigerant.
  • the natural gas fuel supply system including a reliquefaction machine and a reliquefaction machine using liquefied natural gas includes a reliquefaction machine capable of reliquefying natural gas vapor generated in a storage tank for storing liquid natural gas.
  • the liquefied natural gas can be reused while maintaining the pressure inside the storage tank.
  • the present invention can be used in gasification facilities using natural gas of ships or terminals fueled by LNG, and can also be used in L.CNG filling stations that store natural gas and are used under high pressure gas. By controlling the pressure inside the tank to prevent the risk of damage, there is an advantage that does not need a separate container or piping according to the fuel reliquefaction.

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

Abstract

La présente invention concerne un dispositif de reliquéfaction utilisant du gaz naturel liquéfié et un système d'alimentation de combustible de gaz naturel comportant le dispositif de reliquéfaction. Selon un aspect de la présente invention, le système d'alimentation de combustible de gaz naturel comporte: un réservoir de stockage dans lequel du gaz naturel liquéfié est stocké et de la vapeur de gaz naturel est stockée dans une couche supérieure de celui-ci ; un générateur de pression qui augmente la pression du gaz naturel liquéfié transféré depuis le réservoir de stockage ; un détendeur dans lequel la vapeur de gaz naturel est fournie depuis le réservoir de stockage, et le gaz naturel liquéfié qui circule dans le détendeur est converti en un état de haute pression par le générateur de pression ; et une conduite de reliquéfaction de vapeur de gaz naturel qui guide le gaz naturel liquéfié de sorte que le gaz naturel liquéfié soit détendu à l'intérieur d'un dispositif de reliquéfaction, le dispositif de reliquéfaction effectuant une reliquéfaction de la vapeur de gaz naturel.
PCT/KR2011/003643 2011-05-06 2011-05-17 Dispositif de reliquéfaction utilisant du gaz naturel liquéfié et système d'alimentation de combustible de gaz naturel Ceased WO2012153886A1 (fr)

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KR20110042759 2011-05-06
KR10-2011-0042759 2011-05-06

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WO2012153886A1 true WO2012153886A1 (fr) 2012-11-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852692A (zh) * 2020-08-19 2020-10-30 上海燃料电池汽车动力系统有限公司 一种燃料供应装置及车辆动力系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0960799A (ja) * 1995-08-25 1997-03-04 Kobe Steel Ltd 複数成分をもつ低温液体及びそのボイルオフガスの処理装置
JPH09183989A (ja) * 1995-12-28 1997-07-15 Nippon Sanso Kk 液化天然ガス貯槽の蒸発ガス再液化装置及び方法
JP2000146430A (ja) * 1998-11-13 2000-05-26 Osaka Gas Co Ltd Ｌｎｇ利用のｂｏｇ再液化方法
KR20080031708A (ko) * 2007-05-08 2008-04-10 대우조선해양 주식회사 선박의 연료가스 공급 시스템 및 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0960799A (ja) * 1995-08-25 1997-03-04 Kobe Steel Ltd 複数成分をもつ低温液体及びそのボイルオフガスの処理装置
JPH09183989A (ja) * 1995-12-28 1997-07-15 Nippon Sanso Kk 液化天然ガス貯槽の蒸発ガス再液化装置及び方法
JP2000146430A (ja) * 1998-11-13 2000-05-26 Osaka Gas Co Ltd Ｌｎｇ利用のｂｏｇ再液化方法
KR20080031708A (ko) * 2007-05-08 2008-04-10 대우조선해양 주식회사 선박의 연료가스 공급 시스템 및 방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111852692A (zh) * 2020-08-19 2020-10-30 上海燃料电池汽车动力系统有限公司 一种燃料供应装置及车辆动力系统

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