CN107407231A - The gas supply system of ship - Google Patents

The gas supply system of ship Download PDF

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Publication number
CN107407231A
CN107407231A CN201680008497.9A CN201680008497A CN107407231A CN 107407231 A CN107407231 A CN 107407231A CN 201680008497 A CN201680008497 A CN 201680008497A CN 107407231 A CN107407231 A CN 107407231A
Authority
CN
China
Prior art keywords
gas
boil
line
liquefied
supplied
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201680008497.9A
Other languages
Chinese (zh)
Other versions
CN107407231B (en
Inventor
姜镐淑
李元斗
崔在雄
尹虎炳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Heavy Industries Co Ltd
Original Assignee
Samsung Heavy Industries Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Heavy Industries Co Ltd filed Critical Samsung Heavy Industries Co Ltd
Priority claimed from PCT/KR2016/000576 external-priority patent/WO2016126025A1/en
Publication of CN107407231A publication Critical patent/CN107407231A/en
Application granted granted Critical
Publication of CN107407231B publication Critical patent/CN107407231B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • 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
    • 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
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • 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
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0239—Pressure or flow regulators therefor
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/089—Layout of the fuel vapour installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
    • Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

Landscapes

  • 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)
  • Analytical Chemistry (AREA)

Abstract

The present invention discloses a kind of gas supply system of ship.According to an embodiment of the invention, the gas supply system of ship includes being used for the holding vessel for accommodating the combustion gas being made up of liquid gas and boil-off gas, the compression unit of boil-off gas comprising pressurized storage tank, and the boil-off gas by compression unit is supplied to the boil-off gas supply line of engine, heat exchange and re-liquefied re-liquefied line will be carried out by a part of boil-off gas of compression unit, re-liquefied line includes further pressurization by the presser unit of the boil-off gas of compression unit, the heat-exchange device of heat exchange will be carried out by the boil-off gas of presser unit and the boil-off gas of compression unit front end, the expansion valve that will have been depressurized by the boil-off gas of heat-exchange device, re-liquefied boil-off gas by expansion valve is separated into the gas-liquid separator of gas componant and liquid component.

Description

The gas supply system of ship
【Technical field】
The present invention relates to the gas supply system of ship, is exactly specifically that one kind effectively can handle and manage boil-off gas The gas supply system of the ship of body.
【Background technology】
As supervision of the International Maritime Organization (IMO) to greenhouse gases and various Air Pollutant Emissions is strengthened, in shipbuilding Combustion gas with clean energy resource natural gas to be used for ship more and more in shipping world, instead of the heavy oil and diesel oil used in the past Deng conventional fuel.
The valuable source natural gas (Natural Gas) being widely used in combustion gas, main component is methane (methane), storing and transport for convenience, natural gas is typically cooled to -162 degrees Celsius, volume is reduced to 1/600, Phase transformation turns to the super-low liquid i.e. liquefied natural gas (Liquefied Natural Gas) of water white transparency to take care of and use.
This liquefied natural gas is accommodated in the holding vessel through heat-insulated processing on hull and is stored and transports.However, because Liquefied natural gas is substantially hardly possible completely by heat-insulated accommodate, and outside heat is constantly transferred in holding vessel, storage Liquefied natural gas vaporization will be accumulated in tank and caused boil-off gas.
Because such boil-off gas can improve holding vessel internal pressure so as to trigger the deformation of holding vessel and damage, Vibration in the transportation of liquefied natural gas because of ship may trigger the structural issue of holding vessel and ship, it is necessary to suppress The generation or processing of boil-off gas and removal boil-off gas.
Commonly used approach has, and is arranged boil-off gas by the exhaust mast (Vent mast) provided on the upside of holding vessel Run out or by gas combustion apparatus GCU (Gas combustion Unit) burn boil-off gas method.However, from energy From the point of view of imitating angle, these methods are unsatisfactory, and have the danger that fire and blast occurs during the boil-off gas that burns. Therefore, it is necessary to which a kind of can effectively utilize and handle boil-off gas and the easily side using boil-off gas as ship fuel gas supply Method.
【Detailed description of the invention】
【Technical task】
Embodiments of the invention, which provide one kind, to improve boil-off gas while effectively handling or using boil-off gas The gas supply system of the ship of the re-liquefied efficiency of body.
Embodiments of the invention provide a kind of combustion gas that efficient and stable operation ship can be realized with simple structure Feed system.
Embodiments of the invention provide a kind of gas supply system for the ship that can improve energy efficiency.
Embodiments of the invention provide a kind of combustion of the ship for the composition quality that can improve boil-off gas or liquid gas Gas feed system.
【Problem solves method】
According to an aspect of the present invention, the gas supply system of ship may include to be used to accommodate by liquid gas and evaporation The gas storage tank of gas composition, the compression unit of the boil-off gas comprising the holding vessel that pressurizes, and the compression unit will be passed through Boil-off gas be supplied to the boil-off gas supply line of engine, a part of boil-off gas that will pass through the compression unit carries out hot friendship Change and re-liquefied re-liquefied line；The re-liquefied line may include further pressurization by the boil-off gas of the compression unit Presser unit, the heat that heat exchange will be carried out by the boil-off gas of the presser unit and the boil-off gas of the compression unit front end Switch, by the expansion valve depressurized by the boil-off gas of the heat-exchange device, by by described swollen The re-liquefied boil-off gas of swollen valve is separated into the gas-liquid separator of gas componant and liquid component.
The gas supply system of ship also includes the nitrogen point for the presser unit front end being arranged on the re-liquefied line From device, for the boil-off gas for being supplied to the re-liquefied line to be separated into the 1st gas stream containing the 1st concentration nitrogen component and contained 2nd gas stream of the 2nd concentration nitrogen component, the 1st gas stream is supplied to the boil-off gas supply line or the engine, described 2nd gas stream is supplied to the presser unit.
The caloric value that gas supply system can also include measuring and adjusting the combustion gas caloric value for being supplied to the engine is adjusted Section portion, the caloric value adjustment portion include measuring measurement of calorific value device and the regulation of the caloric value for the combustion gas for being supplied to the engine The flow regulator of the re-liquefied line boil-off gas quantity delivered, the flow regulator can be according to the measurement of calorific value The combustion gas caloric value information of device measurement controls its operation.
The gas supply system of ship can also include measuring and adjusting the hair for the combustion gas caloric value for being supplied to the engine Heat regulation portion, the caloric value adjustment portion include measurement be supplied to the engine combustion gas caloric value measurement of calorific value device, Entrance side one end is connected to the nitrogen separator front end on the re-liquefied line, and outlet side one end is connected to the re-liquefied line On the nitrogen separator rear end boil-off gas along caloric value regulation line conveying of caloric value regulation line and regulation The flow control valve of quantity delivered, the combustion gas caloric value information control that the flow control valve can measure according to the measurement of calorific value device Make its operation.
The gas supply system of ship can also include measuring and adjusting the hair for the combustion gas caloric value for being supplied to the engine Heat regulation portion, the caloric value adjustment portion include measurement be supplied to the engine combustion gas caloric value measurement of calorific value device, The caloric value regulation line that the nitrogen separator rear end of re-liquefied line described in a part of 1st gas flow is circulated and regulation Along the flow control valve of the quantity delivered of the 1st gas stream of caloric value regulation line conveying, the flow control valve can basis The combustion gas caloric value information of the measurement of calorific value device measurement controls its operation.
The gas supply system of ship can include being used to accommodate the gas storage being made up of liquid gas and boil-off gas Tank, the compression unit of the boil-off gas comprising the holding vessel that pressurizes, and the boil-off gas by the compression unit is supplied to and started The boil-off gas supply line of machine and and from the boil-off gas supply line formed branch re-liquefied line, the re-liquefied line bag Include the boil-off gas compressed by the compression unit is pressurizeed presser unit, by by the steaming of the presser unit Oil removing portion that the oil contained in body of getting angry removes, by by the evaporation of the boil-off gas in the oil removing portion and the compression unit front end Gas carries out the heat-exchange device of heat exchange, the expansion that will have been depressurized by the boil-off gas of the heat-exchange device Valve, the boil-off gas being depressurized by the expansion valve is separated into the gas-liquid separation of gas componant and liquid component Device.
The gas supply system of ship can include being used to accommodate the gas storage being made up of liquid gas and boil-off gas Tank, the compression unit of the boil-off gas comprising the holding vessel that pressurizes, and the boil-off gas by the compression unit is supplied to the 1st The boil-off gas supply line of engine and it will be carried out by a part in the boil-off gas of the compression unit re-liquefied Re-liquefied line, the re-liquefied line include the boil-off gas by the compression unit is pressurizeed presser unit, will pass through Cooling end that the boil-off gas of the presser unit is cooled down, the cooled boil-off gas by the cooling end carried out 1 time decompression the 1st expansion valve and the boil-off gas by the gas-liquid mixture phase of the 1st expansion valve is separated into gas componant The 1st gas-liquid separator with liquid component, the 2nd engine will be supplied to from the gas componant of the 1st gas-liquid separator separates Boil-off gas circular route, the 2nd expansion valves of 2 decompressions will be carried out from the liquid component of the 1st gas-liquid separator separates and will be incited somebody to action Gas componant and the 2nd gas-liquid point of liquid component are separated into by the boil-off gas of the gas-liquid mixture phase of the 2nd expansion valve From device.
The gas supply system of ship also includes the nitrogen separator of the presser unit front end on the re-liquefied line, For the boil-off gas for being supplied to the re-liquefied line to be separated into the 1st gas stream containing the 1st concentration nitrogen component and dense containing the 2nd Spend the 2nd gas stream of nitrogen component.
The gas supply system of ship is also including will be supplied to what the oil contained in the boil-off gas of the re-liquefied line removed Oil removing portion.
The gas supply system of ship can include measuring and adjusting the hair for the combustion gas caloric value for being supplied to the 1st engine Heat regulation portion, the caloric value adjustment portion include the measurement of calorific value that measurement is supplied to the combustion gas caloric value of the 1st engine Device and the flow control valve for adjusting the steam gas quantity delivered to the re-liquefied line supply, the flow control valve can be according to institute The combustion gas caloric value for stating the measurement of measurement of calorific value device controls its operation.
The oil removing portion can be arranged on the rear end of the presser unit on the re-liquefied line.
The re-liquefied line also include by the gas componant from the 2nd gas-liquid separator separates be supplied to the holding vessel or The boil-off gas exhausting line of the compression unit front end of the boil-off gas supply line, and by from the liquid of the 2nd gas-liquid separator separates Composition is supplied to the liquid gas exhausting line of the holding vessel.
The presser unit may be configured as the boil-off gas by the compression unit being pressurized to 50bar to 150bar.
The nitrogen separator may include membrane filter, cyclone separator (Cyclone), gas centrifuge (Gas Centrifuge it is at least one) and in vortex tube (Vortex tube).
The nitrogen component of 1st concentration contains the nitrogen component of higher concentration than the nitrogen component of the 2nd concentration.
【The effect of invention】
The gas supply system of the related ship of embodiments of the invention is with effectively processing or using boil-off gas and carries The effect of the re-liquefied efficiency of high boil-off gas.
The gas supply system of the related ship of embodiments of the invention, which has, improves energy efficiency, can use simple knot Structure is effectively and the effect stably used.
The gas supply system of the related ship of embodiments of the invention has and prevented in processing boil-off gas or liquefied gas The effect of composition Quality Down occurs during body.
【The simple declaration of accompanying drawing】
Fig. 1 is the concept map of the related ship gas supply system of the 1st embodiment of the present invention.
Fig. 2 is the concept map of the related ship gas supply system of the 2nd embodiment of the present invention.
Fig. 3 is the concept map of the related ship gas supply system of the 3rd embodiment of the present invention.
Fig. 4 is the concept map of the related ship gas supply system of the 4th embodiment of the present invention.
Fig. 5 is the concept map of the related ship gas supply system of the 5th embodiment of the present invention.
Fig. 6 is the concept map of the related ship gas supply system of the 6th embodiment of the present invention.
Fig. 7 is the concept map of the related ship gas supply system of the 7th embodiment of the present invention.
Fig. 8 is the concept map of the related ship gas supply system of the 8th embodiment of the present invention.
【Invent the form implemented】
Embodiments of the invention are described in detail hereinafter with reference to accompanying drawing.Following embodiments be in order to will the present invention Technological thought is fully conveyed to the people with general knowledge in the technical field of the invention and provided.It is of the invention and unlimited In examples provided below, it can also be embodied in other forms.Accompanying drawing in order to clearly present invention omits with explanation The diagram of irrelevant portions, and in order to help to understand, the description to inscape size is more or less exaggerated.
According to an embodiment of the invention, in the description of the gas supply system of ship, ship can be understood as including Various marine structures.These ships not only include the liquefied gas carrier of carrying liquefied gases, but also including various energy Enough liquid gas are as fuel driven or the marine structure of generating.In addition, any ship that liquid gas can be used as to fuel Oceangoing ship, no matter which kind of form, can all be included in the ship of meaning of the invention.For example, the ship of the present invention should be interpreted to include such as The ships such as LNG cargo ships, LNG RV, in addition to such as LNG FPSO, LNG FSRU oceans factory etc..
In an embodiment of the present invention, in order to help to understand the present invention, produced using liquefied natural gas and liquefied natural gas Boil-off gas illustrate, but the invention is not restricted to this, using various liquid gas, such as liquefied ethane gas, liquefaction hydro carbons When gas etc. and resulting boil-off gas, same technological thought all should be equally understood to.
Fig. 1 is the concept map of the related ship gas supply system (1100) of the 1st embodiment of the displaying present invention.
Reference picture 1, the related ship gas supply system (1100) of the 1st embodiment of the invention include holding vessel (1110) boil-off gas of holding vessel (1110), is supplied to the liquefied gas supplying line (1140) of engine, boil-off gas will be passed through The part boil-off gas of body supply line (1120) carries out re-liquefied re-liquefied line (1130) and the liquefaction by holding vessel (1110) Gas is supplied to the liquefied gas supplying line (1140) of engine.
Holding vessel (1110) is used to accommodating or storing liquefied natural gas and boil-off gas.In order that outside heat intrusion causes Liquefied natural gas vaporization minimize as far as possible, holding vessel (1110) can be the film-type cargo hold by heat-insulated processing.Storage Tank (1110) accommodates or stored the liquefied natural gas by supplies such as the grown places of natural gas, right untill arriving at unloading Liquefied natural gas and boil-off gas carry out stablizing keeping, described further below, can also be used as the driving of ship with starting The combustion gas of the dynamo engine of machine or ship.
Holding vessel (1110) is generally thermally insulated, however, blocking outside heat intrusion to be virtually impossible to completely , therefore will have liquefied natural gas in holding vessel (1110) and vaporize and caused boil-off gas naturally.Because such steaming Body of getting angry can improve holding vessel (1110) internal pressure so as to there is the danger of the deformation for triggering holding vessel (1110) and blast, It is necessary that boil-off gas is removed and handled from holding vessel (1110).Therefore boil-off gas caused by holding vessel (1110) inside is such as 1st embodiment of the invention, the combustion gas that engine can be used as by boil-off gas supply line (1120) use or by re-liquefied line (1130) it is supplied to after re-liquefied in holding vessel (1110).It is different from methods described, although not illustrated in accompanying drawing, storage can also be passed through Deposit exhaust mast (not shown) on the upside of tank (1110) or by gas combustion apparatus GCU (Gas combustion Unit, not Diagram) boil-off gas is further processed or consumed.
Engine can be supplied to the combustion gas such as the liquefied natural gas for being contained in holding vessel (1110) and boil-off gas, and by its For producing the driving force of ship or generating power supply for producing ship internal unit.Engine can be relative by being provided 1st engine of high-pressure gas and power output and be provided relatively low pressure combustion gas simultaneously power output the 2nd cluster engine into.Example Such as, the 1st engine can be by being formed using the X-DF engines (about 16bar) of high-pressure gas power output, and the 2nd engine can be by making Formed with the DFDE engines (3bar to 5bar) of low-pressure fuel gas power output.However, the invention is not restricted to this, various numbers are used It should also be understood in the same manner when the engine of amount and the engine of various species.
Boil-off gas supply line (1120) is used to caused boil-off gas in holding vessel (1110) being supplied to as combustion gas Engine.One end of boil-off gas supply line (1120) is connected with the inside of holding vessel (1110), and the other end is retouched with will be detailed below The liquefied gas supplying line (1140) stated is connected after merging with engine.Boil-off gas supply line (1120) is in order to being supplied to The internal boil-off gas of holding vessel (1110), its arrival end is arranged on the internal upside of holding vessel (1110), in order to be supplied to Boil-off gas be adjusted to the pressure and temperature conditionss of engine calls, also comprising the compression unit for possessing multiple compressors (1121)。
Compression unit (1121) includes the compressor 1121a of Compression Evaporation gas and will carried out by the boil-off gas of compression heating The cooler 1121b of cooling.Compression unit (1121) is arranged on boil-off gas supply line (1120), and will describe below The front end for the position that re-liquefied line (1130) is branched off, boil-off gas is pressurizeed.If engine is by with multiple pressure conditions Multiple cluster engines into, such as Fig. 1, boil-off gas supply line can from the center section of compression unit (1121) again branch to 2nd engine supplies combustion gas.
In Fig. 1, compression unit (1121) is made up of 3 sections of compressor 1121a and cooler 1121b, but this is an implementation Example, compression unit (1121) can be according to the different pressure conditions and temperature of engine calls, by multiple compressors and cooling unit Into.
Meanwhile the front end of the compression unit (1121) on boil-off gas supply line (1120), it can set what is be described below The heat-exchange device (1132) of re-liquefied line (1130), this will will be described in detail below.
Re-liquefied line (1130) may include further pressurization by the presser unit of the boil-off gas of compression unit 1131 (1131), the heat-exchange device (1132) of heat exchange and cooling will be carried out, by by the boil-off gas of presser unit (1131) The expansion valve (1133) that is depressurized through the boil-off gas by the heat-exchange device, accommodate by expansion valve (1133) Re-liquefied boil-off gas gas-liquid separator (1134), will from gas-liquid separator (1134) separate liquid component evaporation The gas componant that gas is supplied to the exhausting line (1135) of holding vessel (1110) and will separated from gas-liquid separator (1134) again Boil-off gas is supplied to the re-circulation line (1136) of holding vessel (1110) or boil-off gas supply line (1120).
Re-liquefied line (1130) can go out from compression unit (1121) the rear end branch on boil-off gas supply line (1120) Formed.Re-liquefied line (1130) and the bifurcation of boil-off gas supply line (1120) can set triple valve (not shown), threeway Valve can adjust the boil-off gas quantity delivered to the 1st engine or re-liquefied line (1130) supply.Triple valve can be by operator's hand Dynamic operation, with the degree of the opening and closing of controlling switch and opening and closing, or it can be grasped automatically by controller (not shown) Make, to control the operation.
Presser unit (1131) is arranged to the boil-off gas that further compression passes through compression unit (1121).Presser unit (1131) by the further compressor (1131a) for the boil-off gas that compression passes through compression unit (1121) and by by the steaming of compression heating Cooler (1131b) composition that body of getting angry is cooled down.
Presser unit (1131) will can be supplied to behind the heat-exchange device to be described (1132) and expansion valve (1133) Boil-off gas is pressurized to 50bar to 150bar pressure limit.Boil-off gas is pressurized to 50bar to 150bar pressure limit When being cooled down and depressurized again, the re-liquefied of boil-off gas is very easy to, therefore presser unit (1131) can be according to being supplied to hair The different condition of the pressure condition of the boil-off gas of motivation, you can with according to the pressure strip for improving re-liquefied efficiency or re-liquefied amount Part is further pressurizeed to boil-off gas.
Fig. 1 is illustrated, and presser unit (1131) is made up of 1 compressor (1131a) and a cooler (1131b), But quantity is not limited thereto, if boil-off gas can be pressurized to 50bar to 150bar pressure limit, it is more use can be included The situation of individual compressor and cooler composition.
Heat-exchange device (1132) is arranged to make by the boil-off gas that presser unit (1131) is pressurized with passing through evaporation The boil-off gas of compression unit (1121) front end of gas feed line (1120) carries out heat exchange.Pass through the steaming of presser unit (1131) Body of getting angry is pressurizeed by compressor (1131a) and is in the state of temperature rising, with the pressure by boil-off gas supply line (1120) The mutual heat exchange of boil-off gas of the low temperature of contracting portion (1121) front end, can be cooled down by the pressurized of re-liquefied line (1130) Boil-off gas.As described above, without separately setting cooling device, by the boil-off gas being pressurized by presser unit (1131) with passing through The boil-off gas of boil-off gas supply line (1120) carries out heat exchange and cooled down, and can prevent unnecessary power supply from wasting and improve The operation efficiency of equipment.
Expansion valve (1133) may be provided at the rear end of heat-exchange device (1132).Expansion valve (1133) can will pass through pressurization The boil-off gas of the pressurization cooling of unit (1131) and heat-exchange device (1132) depressurize and further cooling expansion, makes steaming Body of getting angry is re-liquefied.For example, expansion valve (1133) can be by Joule-Thomson valve (Joule-Thomson Valve) structure Into.
Gas-liquid separator (1134) accommodates re-liquefied by the re-liquefied boil-off gas of expansion valve (1133), separation Boil-off gas gas componant and liquid component.When the boil-off gas of pressurization is by expansion valve (1133), most evaporation Gas is re-liquefied, but because producing flash gas, it is possible to create the gas componant of re-liquefied boil-off gas.Therefore from gas-liquid point The liquid component for the re-liquefied boil-off gas isolated from device (1134), supplied again by the exhausting line to be described below (1135) To holding vessel (1110), the gas componant of the re-liquefied boil-off gas of separation, pass through the re-circulation line to be described below (1136) holding vessel (1110) or boil-off gas supply line (1120) are supplied to again.
Exhausting line (1135) is in order to the liquid component for the boil-off gas isolated from gas-liquid separator (1134) is supplied again To holding vessel (1110), it is arranged to connect gas-liquid separator (1134) and holding vessel (1110).The arrival end of exhausting line (1135) It is connected with the lower end of gas-liquid separator (1134), the port of export is connected with the inside of holding vessel (1110).Can on exhausting line (1135) To set the switch valve (not shown) that can adjust the re-liquefied boil-off gas quantity delivered for being recycled to holding vessel (1110).
Re-circulation line (1136) is in order to will be from the gas for the re-liquefied boil-off gas that gas-liquid separator (1134) are isolated Composition is supplied to holding vessel (1110) or boil-off gas supply line (1120) again, is arranged to connect gas-liquid separator (1134) and storage Tank (1110) or connection gas-liquid separator (1134) and boil-off gas supply line (1120).Re-circulation line (1136) figure in Fig. 1 It is shown as the boil-off gas of the internal gas componant of gas-liquid separator (1134) being supplied to the pressure of boil-off gas supply line (1120) again The front end in contracting portion (1121), in addition to the situation, should also include from gas-liquid separator (1134) be supplied to again holding vessel (1110) or It is supplied to the situation of boil-off gas supply line (1120) and holding vessel (1110) again simultaneously.
The liquefied natural gas that liquefied gas supplying line (1140) is arranged to accommodate holding vessel (1110) or store is as combustion Gas is supplied to engine.Liquefied gas supplying line (1140) may be configured as the inside that one end is connected to holding vessel (1110), the other end Engine is connected to after merging with the boil-off gas supply line (1120) to be described below.Liquefied gas supplying line (1140) enter Mouth end is arranged on the interior lower end of holding vessel (1110), and in order to supply liquefied natural gas to engine side, delivery pump can be set (1141)。
As it was previously stated, if engine is by being provided the 1st engine of relatively high pressure combustion gas and power output and being provided phase To the 2nd cluster engine of low-pressure fuel gas and power output into when, liquefied gas supplying line (1140) can be arranged to include the 1st liquid Change gas feed line (1140a) and the 2nd liquefied gas supplying line (1140b), to be handled according to the combustion gas requirement of each engine Liquid gas.
The liquefied natural gas conveyed by delivery pump (1141) can be supplied to by the 1st liquefied gas supplying line (1140a) to be needed To use the 2nd engine of relatively low pressure combustion gas and power output.During delivery pump (1141) transportation of liquefied natural gas Liquefied natural gas is compressed to low pressure (3bar to 5bar), the 2nd engine by DFDE cluster engines into when, without separately setting pressurization Pump, the liquefied natural gas forced vaporization that vaporizer (1144) will can also be conveyed by delivery pump (1141), and start according to the 2nd The combustion gas condition supply combustion gas that machine needs.
The rear end of vaporizer (1144) can set gas-liquid separator (1145).2nd engine by DFDE cluster engines into When, combustion gas needs to supply to produce under gaseous state stably to export and prevent engine breakdown.Therefore will pass through The liquefied natural gas of vaporizer (1144) is supplied to gas-liquid separator (1145), from gas-liquid separator (1145) only by gaseous state Combustion gas is supplied to the 2nd engine, so as to improve the reliability of the gas supply system 1100 of ship.
The liquefied natural gas conveyed by delivery pump (1141) can be supplied to by the 2nd liquefied gas supplying line (1140b) to be needed To use the 1st engine of relatively high pressure combustion gas and power output.Therefore, it can be set on the 2nd liquefied gas supplying line (1140b) Compress and liquefy the force (forcing) pump (1142) of natural gas.The pressure condition for the combustion gas that force (forcing) pump (1142) can need according to the 1st engine Compress and liquefy natural gas, for example, the 1st engine by X-DF cluster engines into when, force (forcing) pump (1142) can compress liquefied natural gas Supplied to about 16bar pressure condition.The liquefied natural gas compressed by force (forcing) pump (1142) passes through vaporizer the last 1143 After system vaporization, merge with boil-off gas supply line (1120), the 1st engine is supplied to as combustion gas.
Meanwhile because force (forcing) pump (1142) need repairing maintenance or force (forcing) pump (1142) load aggravate need to cut off the electricity supply when, If cutting off the power supply of force (forcing) pump (1142) immediately, the liquefied natural gas compressed be present and force (forcing) pump (1142) or other compositions are made Into influence, cause the failure of force (forcing) pump (1142) or the hidden danger of other security incidents.And force (forcing) pump (1142) needs also be present Maintenance or force (forcing) pump (1142) load aggravate needs and cut off the electricity supply, but still require that the situation for maintaining engine continuous work.
Therefore, by-pass line (1140c) can be set on the 2nd liquefied gas supplying line (1140b).By-pass line (1140c) Arrival end be connected to the 2nd liquefied gas supplying line (1140b) force (forcing) pump (1142) front end, the port of export is connected to the 2nd liquid Change the rear end of the force (forcing) pump (1142) of gas feed line (1140b), and other force (forcing) pump (1142) is set, make force (forcing) pump (1142) connection side by side.
By the by-pass line (1140c) of the force (forcing) pump (1142) additionally set, multiple force (forcing) pumps (1142) are in the 2nd liquefied gas Arranged in parallel on body supply line (1140b), therefore even if in the previous case, be also possible to prevent force (forcing) pump (1142) failure or Other security incidents occur, and can realize engine long time continuous firing.
The related ship gas supply system (2100) of the 2nd embodiment to the present invention illustrates below.
Fig. 2 is the concept map of the related ship gas supply system (2100) of the 2nd embodiment of the displaying present invention.
Reference picture 2, the related ship gas supply system (2100) of the 2nd embodiment of the invention include holding vessel (2110) boil-off gas of holding vessel (2110), is supplied to the liquefied gas supplying line (2140) of engine, boil-off gas will be passed through The part boil-off gas of body supply line (2120) carries out re-liquefied re-liquefied line (2130) and the liquefaction by holding vessel (2110) Gas is supplied to the liquefied gas supplying line (2140) of engine, for the boil-off gas for being supplied to re-liquefied line (2130) to be separated into The nitrogen separator (2150) of the 1st gas stream containing the 1st concentration nitrogen component and the 2nd gas stream containing the 2nd concentration nitrogen component, survey Measure and adjust the caloric value adjustment portion for the combustion gas caloric value for being supplied to engine.
Holding vessel (2110) is used to accommodating or storing liquefied natural gas and boil-off gas.In order that outside heat intrusion causes Liquefied natural gas vaporization minimize as much as possible, holding vessel (2110) can be the film-type cargo hold by heat-insulated processing.Storage Deposit tank (2110) to accommodate or store the liquefied natural gas by supplies such as the grown places of natural gas, untill arriving at unloading Liquefied natural gas and boil-off gas are carried out stablizing keeping, it is as described below, it can also be used as the driving hair of ship The combustion gas of the dynamo engine of motivation or ship.
Holding vessel (2110) is generally thermally insulated, however, the intrusion for blocking outside heat completely is actually can not Can, therefore will have liquefied natural gas in holding vessel (2110) and vaporize and caused boil-off gas naturally.It is because such Boil-off gas may lift holding vessel (2110) internal pressure, so as in the presence of the hidden of the deformation and blast for triggering holding vessel (2110) Suffer from, it is necessary to boil-off gas is removed and handled from holding vessel (2110).Therefore boil-off gas caused by holding vessel (2110) inside Such as the 2nd embodiment of the invention, the combustion gas that engine can be used as by boil-off gas supply line (2120) uses or by liquid again body It is supplied to after change line (2130) is re-liquefied in holding vessel (2110).It is different from methods described, although not illustrated in accompanying drawing, can also lead to The exhaust mast (not shown) crossed on the upside of holding vessel (2110) will be steamed by GCU (Gas combustion Unit, not shown) Body of getting angry is further processed or consumed.
Engine can be supplied to the combustion gas such as the liquefied natural gas for being contained in holding vessel (2110) and boil-off gas, and by its For producing the driving force of ship or generating power supply for producing ship internal unit.Engine can be relative by being provided 1st engine of high-pressure gas and power output and be provided relatively low pressure combustion gas simultaneously power output the 2nd cluster engine into.Example Such as, the 1st engine can be by being formed using the X-DF engines (about 16bar to 18bar) of high-pressure gas power output, and the 2nd starts Machine can be by being formed using the DFDE engines (about 5bar to 8bar) of low-pressure fuel gas power output.However, the invention is not restricted to this, It should also be understood in the same manner during using multiple engines and all kinds of engines.
Boil-off gas supply line (2120) using caused boil-off gas in holding vessel (2110) as combustion gas for giving to hair Motivation.One end of boil-off gas supply line (2120) is connected with the inside of holding vessel (2110), and the other end is with being described below Liquefied gas supplying line (2140) merge after be connected with engine.Boil-off gas supply line (2120) stores up in order to be supplied to Deposit the gas supply system of the internal ship according to claim 7 of tank (2110), it is characterised in that contracting portion (2121) are set Put on boil-off gas supply line (2120), and before the position that is branched off of the re-liquefied line (2130) that will be described below End, pressurizes to boil-off gas.If engine is by multiple cluster engines with multiple pressure different conditions into such as Fig. 2, steaming Combustion gas can be supplied from the further branch in center section of compression unit (2121) to the 2nd engine by sending out gas feed line.
In Fig. 2, compression unit (2121) is made up of 3 sections of compressors (2121a) and cooler (2121b), but this is one Embodiment, compression unit (2121) can be according to the different pressure conditions and temperature of engine calls, by multiple compressors and cooling Machine forms.
Meanwhile the front end of the compression unit (2121) on boil-off gas supply line (2120), it can set what is be described below The heat-exchange device (2132) of re-liquefied line (2130), this will will be described in detail below.
Re-liquefied line (2130) may include the presser unit for being further forced through the boil-off gas of compression unit (2131) (2131), the heat-exchange device (2132) of heat exchange and cooling will be carried out, by by the boil-off gas of presser unit (2131) The expansion valve (2133) that is depressurized through the boil-off gas by the heat-exchange device, accommodate by expansion valve (2133) Re-liquefied boil-off gas gas-liquid separator (2134), will be from the steaming for the liquid component that gas-liquid separator (2134) are isolated Body of getting angry be supplied to again the exhausting line of holding vessel (2110) (2135) and will from the gas that gas-liquid separator (2134) are isolated into The boil-off gas divided is supplied to the re-circulation line (2136) of holding vessel (2110) or boil-off gas supply line (2120).
Re-liquefied line (2130) can be branched off from compression unit (2121) rear end on boil-off gas supply line (2120) Formed.The flow to be described is adjusted behind the bifurcation of re-liquefied line (2130) and boil-off gas supply line (2120) can be set Regulating device (2161), this will be detailed below to describe in detail.
Presser unit (2131) is arranged to further compress the boil-off gas by compression unit (2121).Pressurization is single First (2131) are by the compressor (2131a) that is further compressed the boil-off gas by compression unit (2121) and will be compressed Cooler (2131b) composition that the boil-off gas of heating is cooled down.
Presser unit (2131) will can be supplied to behind the heat-exchange device to be described (2132) and expansion valve (2133) Boil-off gas is pressurized to 50bar to 150bar pressure limit.Boil-off gas is pressurized to 50bar to 150bar pressure limit When being cooled down and depressurized again, the re-liquefied of boil-off gas is very easy to, therefore presser unit (2131) can be according to being supplied to hair The different condition of the pressure condition of the boil-off gas of motivation, you can with according to the pressure strip for improving re-liquefied efficiency or re-liquefied amount Part is further pressurizeed to boil-off gas.
Fig. 2 is illustrated, and presser unit (2131) is made up of 1 compressor (2131a) and a cooler (2131b), But quantity is not limited thereto, if boil-off gas can be pressurized to 50bar to 150bar pressure limit, it is more use can be included The situation of individual compressor and cooler composition.
Heat-exchange device (2132) is arranged to make by the boil-off gas that presser unit (2131) is pressurized with passing through evaporation The boil-off gas of compression unit (2121) front end of gas feed line (2120) carries out heat exchange.Pass through the steaming of presser unit (2131) Body of getting angry is pressurizeed by compressor (2131a) and is in the state of temperature rising, with the pressure by boil-off gas supply line (2120) The mutual heat exchange of boil-off gas of low temperature before contracting portion (2121), can cool down the pressurized steaming by re-liquefied line (2130) Get angry body.As described above, without separately setting cooling device, by the boil-off gas being pressurized by presser unit (2131) and pass through steaming The boil-off gas of hair gas feed line (2120) carries out heat exchange and cooled down, and can prevent unnecessary power supply from wasting and improving to set Standby operation efficiency.
Expansion valve (2133) may be provided at the rear end of heat-exchange device (2132).Expansion valve (2133) can will pass through pressurization The boil-off gas of the pressurization cooling of unit (2131) and heat-exchange device (2132) depressurize and further cooling expansion, makes steaming Body of getting angry is re-liquefied.For example, expansion valve (2133) can be made up of Joule-Thomson valve (Joule-Thomson Valve).
Gas-liquid separator (2134) accommodates re-liquefied by the re-liquefied boil-off gas of expansion valve (2133), separation Boil-off gas gas componant and liquid component.When the boil-off gas of pressurization is by expansion valve (2133), most evaporation Gas is re-liquefied, but because producing flash gas, it is possible to create the gas componant of re-liquefied boil-off gas.Therefore from gas-liquid point The liquid component for the re-liquefied boil-off gas isolated from device (2134), supplied again by the exhausting line to be described below (2135) To holding vessel (2110), the gas componant of the re-liquefied boil-off gas of separation, pass through the re-circulation line to be described below (2136) holding vessel (2110) or boil-off gas supply line (2120) are supplied to again.
Exhausting line (2135) is in order to which the liquid component of boil-off gas that will be separated from gas-liquid separator (2134) is to holding vessel (2110) resupply, be arranged to connect gas-liquid separator (2134) and holding vessel (2110).The arrival end of exhausting line (2135) with The lower end connection of gas-liquid separator (2134), the port of export are connected with the inside of holding vessel (2110).Can be with exhausting line (2135) Regulation is set to the switch valve (not shown) of the re-liquefied boil-off gas quantity delivered of holding vessel (2110) recovery.
Re-circulation line (2136) is in order to will be from the gas for the re-liquefied boil-off gas that gas-liquid separator (2134) are isolated Composition is supplied to holding vessel (2110) or boil-off gas supply line (2120) again, is arranged to connect gas-liquid separator (2134) and storage Tank (2110) or connection gas-liquid separator (2134) and boil-off gas supply line (2120).Re-circulation line (2136) figure in Fig. 2 It is shown as the boil-off gas of the internal gas componant of gas-liquid separator (2134) being supplied to the pressure of boil-off gas supply line (2120) again The front end in contracting portion (2121), in addition to the situation, should also include from gas-liquid separator (2134) be supplied to again holding vessel (2110) or It is supplied to the situation of boil-off gas supply line (2120) and holding vessel (2110) again simultaneously.
The front end of presser unit (2131) on re-liquefied line (2130) can be set decomposition and be conducted to re-liquefied line (2130) Boil-off gas in nitrogen component nitrogen separator (2150), this is illustrated more detail below.
The liquefied natural gas that liquefied gas supplying line (2140) is arranged to accommodate holding vessel (2110) or store is as combustion Gas is supplied to engine.Liquefied gas supplying line (2140) may be configured as the inside that one end is connected to holding vessel (2110), the other end Engine is connected to after merging with the boil-off gas supply line (2120) to be described below.Liquefied gas supplying line (2140) enter Mouth end is arranged on the internal lower end of holding vessel (2110), in order to which delivery pump can be set to engine side supply liquefied natural gas (2141)。
As it was previously stated, if engine is by being provided the 1st engine of relatively high pressure combustion gas and power output and being provided phase To the 2nd cluster engine of low-pressure fuel gas and power output into when, liquefied gas supplying line (2140) can be arranged to include the 1st liquid Change gas feed line (2140a) and the 2nd liquefied gas supplying line (2140b), to be handled according to the combustion gas requirement of each engine Liquid gas.
The liquefied natural gas conveyed by delivery pump (2141) can be supplied to by the 1st liquefied gas supplying line (2140a) to be needed To use the 2nd engine of relatively low pressure combustion gas and power output.During delivery pump (2141) transportation of liquefied natural gas Liquefied natural gas is compressed to low pressure (about 5bar to 8bar), the 2nd engine by DFDE cluster engines into when, without separately setting pressurization Pump, the liquefied natural gas forced vaporization that vaporizer (2144) will can also be conveyed by delivery pump (2141), and start according to the 2nd The combustion gas condition supply combustion gas that machine needs.
The rear end of vaporizer (2144) can set gas-liquid separator (2145).2nd engine by DFDE cluster engines into When, combustion gas needs to supply to produce under gaseous state stably to export and prevent engine breakdown.Therefore will pass through The liquefied natural gas of vaporizer (2144) is supplied to gas-liquid separator (2145), and from gas-liquid separator (2145) only by gaseous state Combustion gas be supplied to the 2nd engine, so as to improve the reliability of the gas supply system of ship (2100).
The liquefied natural gas conveyed by delivery pump (2141) can be supplied to by the 2nd liquefied gas supplying line (2140b) to be needed To use the 1st engine of relatively high pressure combustion gas and power output.Therefore, it can be set on the 2nd liquefied gas supplying line (2140b) Compress and liquefy the force (forcing) pump (2142) of natural gas.The pressure condition for the combustion gas that force (forcing) pump (2142) can need according to the 1st engine Compress and liquefy natural gas, for example, the 1st engine by X-DF cluster engines into when, force (forcing) pump (2142) can compress liquefied natural gas Supplied to about 16bar to 18bar pressure condition.The liquefied natural gas compressed by force (forcing) pump (2142) passes through vaporizer (2143) after being forced vaporization, merge with boil-off gas supply line (2120), the 1st engine is supplied to as combustion gas.
Meanwhile because force (forcing) pump (2142) need repairing maintenance or force (forcing) pump (2142) load aggravate need to cut off the electricity supply when, If cutting off the power supply of force (forcing) pump (2142) immediately, the liquefied natural gas compressed be present and force (forcing) pump (2142) or other compositions are made Cause the failure of force (forcing) pump (2142) or the hidden danger of other security incidents into influence.And force (forcing) pump (2142) also be present needs to tie up Repair maintenance or force (forcing) pump (2142) load aggravates needs and cut off the electricity supply, but still require that the situation for maintaining engine continuous work.
Therefore, by-pass line (2140c) can be set on the 2nd liquefied gas supplying line (2140b).By-pass line (2140c) Arrival end be connected to the 2nd liquefied gas supplying line (2140b) force (forcing) pump (2142) front end, the port of export is connected to the 2nd liquid Change the rear end of the force (forcing) pump (2142) of gas feed line (2140b), and other force (forcing) pump (2142) is set, make force (forcing) pump (2142) connection side by side.
By setting the another by-pass line (2140c) for setting force (forcing) pump (2142), multiple force (forcing) pumps (2142) are in the 2nd liquid gas Arranged in parallel on supply line (2140b), therefore even if in the previous case, be also possible to prevent force (forcing) pump (2142) failure or its He occurs security incident, and can realize engine long time continuous firing.
Nitrogen separator (2150) is arranged to be separated the nitrogen component being supplied in the boil-off gas of re-liquefied line (2130).
Nitrogen separator (2150) can be arranged on the front end of the presser unit (2131) on re-liquefied line (2130).Nitrogen separates The boil-off gas for flowing into or being supplied to re-liquefied line (2130) is separated into the 1st gas containing the 1st concentration nitrogen component by device (2150) Stream and the 2nd gas stream containing the 2nd concentration nitrogen component, the 1st gas stream are incorporated to boil-off gas supply line (2120) or as combustion gas Engine is supplied to, the 2nd gas stream is directly supplied to presser unit (2131).
The nitrogen component of the 1st concentration and the nitrogen component of the 2nd concentration illustrated in the present embodiment, represent high concentration nitrogen component and The nitrogen component of low concentration, the nitrogen component of the 1st concentration nitrogen component containing higher concentration compared with the nitrogen component of the 2nd concentration, the 2nd is dense The nitrogen component of degree nitrogen component containing lower concentration compared with the nitrogen component of the 1st concentration.1st concentration and the 2nd concentration are not limited to spy Fixed number value, it is thus understood that the concentration difference between the 1st concentration and the 2nd concentration and caused relative meaning.
Natural gas is in addition to containing main component methane (Methane), also containing ethane (Ethane), propane (Propane), the mixture of butane (Butane), nitrogen (Nitrogen) etc..Wherein, the boiling point of nitrogen is about -195.8 Celsius Degree, than other compositions such as methane (boiling point：- 161.5 degrees Celsius) and ethane (boiling point：- 89 degrees Celsius) it is much lower.Therefore, store Vaporize in tank (2110) in caused natural evaporation gas, contain big because the nitrogen component relatively large amount of low boiling point is evaporated naturally The nitrogen component of amount.If the boil-off gas is re-liquefied, because the boiling point of nitrogen component is very low, so it is difficult to re-liquefied, therefore, With the increase of nitrogen content in boil-off gas, re-liquefied efficiency reduces.
Nitrogen separator (2150) will be flowed into or be supplied to the steaming of re-liquefied line (2130) by boil-off gas supply line (2120) The nitrogen component got angry in body is separated, and the 1st gas stream of the 1st concentration nitrogen component containing rather high concentration passes through boil-off gas Resupply line (2151) with boil-off gas supply line (2120) to merge, or engine is supplied to consume nitrogen component as combustion gas, contain The 2nd gas stream for having the 2nd concentration nitrogen component of relatively low concentration directly passes through re-liquefied process by re-liquefied line (2130), So as to improve the re-liquefied performance and efficiency of re-liquefied line (2130).
Nitrogen separator (2150) can be included in membrane filter, cyclone separator, gas centrifuge and vortex tube extremely It is few one.
Membrane filter has the material for having high-affinity with nitrogen component, and pressurized boil-off gas is because its pressure is through thin Film filter, the 1st gas stream of the nitrogen component containing high concentration are retained by membrane filter, and line is resupplied by boil-off gas (2151) boil-off gas supply line (2120) or the 1st engine are transported to, the 2nd of composition such as methane beyond the nitrogen containing high concentration Gas stream is directly through filter and is supplied to the presser unit (2131) of re-liquefied line (2130).
Cyclone separator (Cyclone) makes the boil-off gas for being supplied to nitrogen separator (2150) form eddy flow, in boil-off gas Upper effect centrifugal force, composition such as methane and ethane beyond nitrogen component and nitrogen are separated, boil-off gas is separated into containing relatively high Concentration is the 1st gas stream of the 1st concentration nitrogen component and contains relative lower concentration i.e. the 2nd gas stream of the 2nd concentration nitrogen component.
Gas centrifuge (Gas centrifuge) is arranged to separate a part of mixed gas by centrifugal separation The composition of state, pressurized boil-off gas.Gas centrifuge can will be supplied to nitrogen separation device by centrifugal force (2150) boil-off gas is separated into the composition beyond nitrogen component and nitrogen component, so as to which boil-off gas is separated into the 1st gas stream With the 2nd gas stream.
Vortex tube (Vortex tube) is a kind of device with narrow pipe, and it is carried by the tangential direction into narrow pipe road Come separating high-temp air-flow and low-temperature airflow for gases at high pressure.When nitrogen separator (2150) is made up of vortex tube, boil-off gas conveying Separated in vortex tube beyond the nitrogen such as nitrogen component and the of a relatively high methane of boiling point, the ethane of the relatively low low temperature of boiling point into Point, make boil-off gas be separated into the 1st gas stream and with the 2nd gas stream.
As described above, nitrogen separator (2150) could be arranged to comprising membrane filter, cyclone separator, gas centrifuge With it is at least one in vortex tube, the boil-off gas for being supplied to re-liquefied line (2130) is separated into the 1st according to the concentration of nitrogen component Gas stream and the 2nd gas stream, the 2nd gas stream containing NITROGEN IN LOW CONCENTRATION composition is directly subjected to liquid again by re-liquefied line (2130) Chemical industry journey, so as to improve the re-liquefied efficiency of re-liquefied line (2130).At the same time, the 1st gas containing high concentration N composition Circulation pervaporation gas resupplies line (2151) and merged with boil-off gas supply line (2120), or is directly supplied to and starts as combustion gas Machine consumes nitrogen component, the nitrogen total content in gas supply system (2100) is gradually reduced with this, there is provided the efficiency of operation of equipment.
In Fig. 2, the port of export that boil-off gas resupplies line (2151) is illustrated as closing again with boil-off gas supply line (2120) And but if being directly supplied to engine, the position of its port of export can have a variety of changes.
Caloric value adjustment portion can measure and adjust the combustion gas caloric value for being supplied to engine especially the 1st engine.
Caloric value (Heating value) refers to the heat discharged during unit combustion gas completely burned.In natural gas, first Alkane, butane and propane have higher caloric value, are composition (the methane caloric values for the caloric value for increasing combustion gas：About 12,000kcal/ Kg, butane caloric value：About 11,863kcal/kg, propane caloric value：2,000kcal/kg), very low (the nitrogen heating of nitrogen caloric value Amount：About 60kcal/kg), therefore the absolute content of nitrogen component or concentration are higher, the gross calorific power of combustion gas is lower.Provided that give The gross calorific power of the combustion gas of engine is too low, it is impossible to meets the minimum caloric value needed for engine, it can influence the defeated of engine Go out, and unnecessary load is brought to engine.
As it was previously stated, in order to improve the re-liquefied efficiency of re-liquefied line (2130), nitrogen separator (2150), which allows, to be flowed into or supplies To re-liquefied line (2130) boil-off gas in containing low concentration be the 2nd concentration nitrogen component the 2nd gas stream by and be supplied to again Liquefy line (2130), and is trapped containing the 1st gas stream that high concentration is the 1st concentration nitrogen component and is supplied to boil-off gas supply line (2120) or engine, therefore the high concentration N composition contained due to the 1st gas stream be present, cause what is supplied to the 1st engine Misgivings of the combustion gas caloric value less than the caloric value condition that the 1st engine needs.
Reference picture 2, the caloric value adjustment portion of the ship gas supply system (2100) of the 2nd embodiment of the invention include measurement And calculate the measurement of calorific value device (2160) for the combustion gas caloric value for being supplied to the 1st engine and adjust to re-liquefied line (2130) The flow regulator (2161) of the steam gas quantity delivered of supply.
Measurement of calorific value device (2160) can measure in real time to be supplied again by boil-off gas supply line (2120) or boil-off gas The combustion gas caloric value comprising boil-off gas and the 1st gas stream of the 1st engine is supplied to line (2151).Measurement of calorific value device (2160) by the combustion gas caloric value information of display unit (not shown) transmission measurement such as including display and it can notify that ship is superior The combustion gas caloric value of measurement is sent to controller (not shown) by visitor, and the controller can be by the way that the inputted the 1st be started The combustion gas caloric value information that the caloric value condition of machine is sent with measurement of calorific value device (2160) is analyzed, and control will be rear The opening and closing degree for the flow regulator (2161) that face is introduced.
Flow regulator (2161) can be arranged on re-liquefied line (2130) from boil-off gas supply line (2120) branch Bifurcation out.Flow regulator (2161) can be triple valve (3way valve), adjust to re-liquefied line (2130) The boil-off gas quantity delivered of supply, but this is also not necessarily limited to, flow regulator (2161) can also pass through measurement of calorific value device (2160) the caloric value conditional information of combustion gas caloric value information and the 1st engine of measurement, it is manually operated or can be by by operator Controller is automatically brought into operation to control its opening and closing degree.
For example, when the caloric value of the combustion gas of measurement of calorific value device (2160) measurement is less than the caloric value condition of the 1st engine, Flow regulator (2161) with Operation switch, can reduce the quantity delivered for the boil-off gas for being supplied to re-liquefied line (2130), increase Directly the quantity delivered to the boil-off gas of the 1st engine is provided by boil-off gas supply line (2120).With by being arranged on The nitrogen separator (2150) of re-liquefied line (2130) and the flow that the 1st gas stream of line (2151) supply is resupplied to boil-off gas Reduce, the combustion gas caloric value supplied to the 1st engine can be increased.
In contrast, when the caloric value of the combustion gas of measurement of calorific value device (2160) measurement exceedes or fully meets that the 1st starts During the caloric value condition of machine, flow regulator (2161) can increase the evaporation for being supplied to re-liquefied line (2130) with Operation switch The quantity delivered of gas, reduce and directly provide the supply to the boil-off gas of the 1st engine by boil-off gas supply line (2120) Amount.With for flowing into re-liquefied line (2130) and resupplying that line (2151) supplies to boil-off gas by nitrogen separator (2150) The flow increase of 1 gas stream, the caloric value regulation of combustion gas can be arrived proper level, meanwhile, increase to re-liquefied line (2130) Presser unit (2131) supply NITROGEN IN LOW CONCENTRATION composition the 2nd gas stream flow, the re-liquefied amount of boil-off gas can be increased.
The related ship gas supply system (2200) of the 3rd embodiment to the present invention illustrates below.
Below in the explanation of the related ship gas supply system (2200) of the 3rd embodiment to the present invention, except increase is another Except in the case of if drawing code illustrates, the ship gas supply system related to foregoing the 2nd embodiment of the invention (2100) explanation is identical, in order to prevent content from repeating to omit related description herein.
The caloric value adjustment portion of the related ship gas supply system (2200) of the 3rd embodiment of the present invention includes measurement simultaneously Calculate the measurement of calorific value device (2260) for the combustion gas caloric value for being supplied to the 1st engine and by the nitrogen on re-liquefied line (2130) The boil-off gas of separator (2150) front end is recycled to the caloric value regulation line (2261) of nitrogen separator (2150) rear end and set Flow control valve (2262) on caloric value regulation line (2261).
Measurement of calorific value device (2260) can measure in real time to be supplied again by boil-off gas supply line (2120) and boil-off gas The combustion gas caloric value comprising boil-off gas and the 1st gas stream of the 1st engine is supplied to line (2151).Measurement of calorific value device (2260) by the combustion gas caloric value information of display unit (not shown) transmission measurement such as including display and it can notify that ship is superior The combustion gas caloric value of measurement is sent to controller (not shown) by visitor, and the controller can be by the way that the inputted the 1st be started The combustion gas caloric value information that the caloric value condition of machine is sent with measurement of calorific value device (2260) is analyzed, and control will be The opening and closing degree of the flow control valve (2262) for the caloric value regulation line (2261) introduced below.
Caloric value adjusts line (2261) by nitrogen separator in the boil-off gas for flowing into or being supplied to re-liquefied line (2130) (2150) boil-off gas of front end is directly supplied to the rear end of nitrogen separator (2150).Therefore, caloric value regulation line (2261) enters Mouth end is connected to the front end of the nitrogen separator (2150) of re-liquefied line (2130), and the port of export is connected to the nitrogen of re-liquefied line (2130) The rear end of separator (2150).Caloric value regulation line (2261) will flow into or be supplied to a part of boil-off gas of re-liquefied line (2130) Body is not supplied to the presser unit (2131) of re-liquefied line (2130) directly by nitrogen separator (2150), reduces from nitrogen separator (2150) flow of the 1st gas stream of separation, so as to increase the caloric value for the combustion gas for being supplied to the 1st engine.On the other hand, it will carry below For describing in detail.
Flow control valve (2262) is arranged on caloric value regulation line (2261), and regulation is defeated by caloric value regulation line (2261) The quantity delivered of the boil-off gas sent.The combustion gas caloric value that flow control valve (2262) is measured by measurement of calorific value device (2260) is believed Breath and the caloric value conditional information of the 1st engine, by operator it is manually operated or can be automatically brought into operation by controller (not shown) with Control its opening and closing degree.
For example, when the caloric value of the combustion gas of measurement of calorific value device (2260) measurement is less than the caloric value condition of the 1st engine, Flow control valve (2262) can open, and increase the supply that the boil-off gas that line (2261) transmits is adjusted by caloric value with this Amount.While increase adjusts the quantity delivered of the boil-off gas of line (2261) transmission by caloric value, on re-liquefied line (2130) to The flow of the steam gas of nitrogen separator (2150) supply is relative to be reduced, and is passed through so as to reduce after nitrogen separator (2150) separation The quantity delivered of the 1st gas stream of containing high concentration N composition of re-liquefied line (2151) transmission.It is thus possible to increase it is supplied to the 1st The caloric value of the combustion gas of engine.
In contrast, the caloric value of the combustion gas of measurement of calorific value device (2260) measurement exceedes or fully met the 1st engine Caloric value condition when, flow control valve (2262) can close, with this reduce by caloric value adjust line (2261) transmit The quantity delivered of boil-off gas.When the caloric value of combustion gas fully meets the caloric value condition of the 1st engine, allow and flow into re-liquefied line (2130) boil-off gas passes through nitrogen separator (2150), so as to increase the flow of the 1st gas stream containing high concentration N composition, Effectively consumed with this and handle nitrogen component.
The related ship gas supply system (2300) of the 4th embodiment to the present invention illustrates below.
In the explanation of the related ship gas supply system (2300) of the 4th embodiment described below to the present invention, remove Increase is another to be set except in the case of drawing code illustrates, the ship fuel gas supply related to foregoing the 2nd embodiment of the invention The explanation of system (2100) is identical, in order to prevent content from repeating to omit related description herein.
The caloric value adjustment portion of the related ship gas supply system (2300) of the 4th embodiment of the present invention includes measurement simultaneously Calculate be supplied to the 1st engine combustion gas caloric value measurement of calorific value device (2360) and by nitrogen separator (2150) separation A part for 1st gas stream is recycled to the caloric value regulation line (2361) of nitrogen separator (2150) rear end and is arranged on caloric value tune Flow control valve (2362) on nodel line (2361).
Measurement of calorific value device (2360) can measure in real time to be supplied again by boil-off gas supply line (2120) and boil-off gas The combustion gas caloric value comprising boil-off gas and the 1st gas stream of the 1st engine is supplied to line (2151).Measurement of calorific value device (2260) by the combustion gas caloric value information of display unit (not shown) transmission measurement such as including display and it can notify that ship is superior The combustion gas caloric value of measurement is sent to controller (not shown) by visitor, and the controller can be by the way that the inputted the 1st be started The combustion gas caloric value information that the caloric value condition of machine is sent with measurement of calorific value device (2360) is analyzed, and control will be rear The opening and closing degree of the flow control valve (2362) for the caloric value regulation line (2361) that face is introduced.
The 1st gas containing high concentration N composition that caloric value regulation line (2361) will be separated by nitrogen separator (2150) A part for stream is recycled to the rear end of the nitrogen separator (2150) on re-liquefied line (2130).Therefore, caloric value adjusts line (2361) boil-off gas that arrival end is connected to the 1st gas stream of transmission is resupplied on line (2151), and the port of export is connected to liquid again Change the rear end of the nitrogen separator (2150) of line (2130).Caloric value regulation line (2361) will resupply line by boil-off gas (2151) part for the 1st gas stream containing high concentration N composition of transmission is recycled on re-liquefied line (2130), is reduced and is supplied To the flow of the 1st gas stream of the 1st engine, so as to increase the caloric value for the combustion gas for being supplied to the 1st engine.On the other hand, below will There is provided and describe in detail.
Flow control valve (2362) is arranged on caloric value regulation line (2361), and regulation adjusts line (2361) by caloric value The quantity delivered of 1st gas stream of conveying.The combustion gas that flow control valve (2362) is measured by measurement of calorific value device (2360) is generated heat The caloric value conditional information of information and the 1st engine is measured, it is manually operated or can be grasped automatically by controller (not shown) by operator Make to control its opening and closing degree.
For example, when the caloric value of the combustion gas of measurement of calorific value device (2360) measurement is less than the caloric value condition of the 1st engine, Flow control valve (2362) can be opened, and increase the supply that the 1st gas stream that line (2361) transmits is adjusted by caloric value with this Amount.While increase adjusts the quantity delivered for the 1st gas stream that line (2361) transmits by caloric value, resupplied by boil-off gas The quantity delivered of 1st gas stream of line (2151) conveying is relative to be reduced, so as to increase the heating for the combustion gas for being supplied to the 1st engine Amount.
In contrast, the caloric value of the combustion gas of measurement of calorific value device (2360) measurement exceedes or fully met the 1st engine Caloric value condition when, flow control valve (2362) can close, with this reduce by caloric value adjust line (2361) transmit The quantity delivered of 1st gas stream.When the caloric value of combustion gas fully meets the caloric value condition of the 1st engine, nitrogen separator is allowed (2150) the 1st gas stream containing high concentration N composition of separation is more transported to boil-off gas and resupplies line (2151) and make Combustion gas for the 1st engine is consumed, and is effectively consumed with this and is handled nitrogen component.
The related ship gas supply system (3100) of the 5th embodiment to the present invention illustrates below.
Fig. 5 is the concept map of the related ship gas supply system (3100) of the 5th embodiment of the present invention.
Reference picture 5, the related ship gas supply system (3100) of the 5th embodiment of the invention include holding vessel (3110) boil-off gas of holding vessel (3110), is supplied to the liquefied gas supplying line (3140) of engine, boil-off gas will be passed through The part boil-off gas of body supply line (3120) carries out re-liquefied re-liquefied line (3130) and the liquefaction by holding vessel (3110) Gas is supplied to the liquefied gas supplying line (3140) of engine, contained for that will be supplied in the boil-off gas of re-liquefied line (3130) Oil remove oil removing portion (3150).
Holding vessel (3110) is used to accommodating or storing liquefied natural gas and boil-off gas.In order that outside heat intrusion causes Liquefied natural gas vaporization minimizes as far as possible, and holding vessel (3110) can be the film-type cargo hold by heat-insulated processing.Holding vessel (3110) liquefied natural gas is supplied to from grown place of natural gas etc., is accommodated or stored, be until arriving at unloading Only liquefied natural gas and boil-off gas are carried out stablizing keeping, as described below, the driving that can also use it for ship is used The combustion gas of the dynamo engine of engine or ship.
Holding vessel (3110) is typically thermally insulated, however, blocking outside heat intrusion to be virtually impossible to completely , therefore will have liquefied natural gas in holding vessel (3110) and vaporize and caused boil-off gas naturally.Because such steaming Body of getting angry can improve holding vessel (3110) internal pressure so as to there is the danger of the deformation for triggering holding vessel (3110) and blast, It is necessary that boil-off gas is removed and handled from holding vessel (3110).Therefore boil-off gas caused by holding vessel (3110) inside is such as 5th embodiment of the invention, the combustion gas that engine can be used as by boil-off gas supply line (3120) use or by re-liquefied line (3130) it is supplied to after re-liquefied in holding vessel (3110).It is different from methods described, although not shown in drawing, storage can also be passed through Deposit exhaust mast (not shown) on the upside of tank (3110) or by GCU (Gas combustion Unit, not shown) by boil-off gas Body is further processed or consumed.
Engine can be supplied to the combustion gas such as the liquefied natural gas for being contained in holding vessel (3110) and boil-off gas, and by its For producing the driving force of ship or generating power supply for producing ship internal unit.Engine can be relative by being provided 1st engine of high-pressure gas and power output and be provided relatively low pressure combustion gas simultaneously power output the 2nd cluster engine into. For example, the 1st engine can be by being formed using the X-DF engines (about 16bar to 18bar) of high-pressure gas power output, the 2nd hair Motivation can be by being formed using the DFDE engines (about 5bar to 8bar) of low-pressure fuel gas power output.However, the invention is not restricted to This, using various quantity engine and various species engine when should also be understood in the same manner.
Boil-off gas supply line (3120) is used to caused boil-off gas in holding vessel (3110) being supplied to as combustion gas Engine.One end of boil-off gas supply line (3120) is connected with the inside of holding vessel (3110), and the other end is retouched with will be detailed below The liquefied gas supplying line (3140) stated is connected after merging with engine.Boil-off gas supply line (3120) is in order to being supplied to The internal boil-off gas of holding vessel (3110), its arrival end is arranged on the internal upside of holding vessel (3110), in order to be supplied to Boil-off gas be adjusted to the pressure and temperature conditionss of engine calls, also comprising the compression unit for possessing multiple compressors (3121)。
Compression unit (3121) includes the compressor (3121a) of Compression Evaporation gas and will entered by the boil-off gas of compression heating The cooler (3121b) of row cooling.Compression unit (3121) is arranged on boil-off gas supply line (3120), and will be retouched below The front end for the position that the re-liquefied line (3130) stated is branched off, is pressurizeed to boil-off gas.If engine is by with multiple Multiple cluster engines of different pressures condition are into such as Fig. 5, boil-off gas supply line can be from the center section of compression unit (3121) Further branch supplies combustion gas to the 2nd engine.
In Fig. 5, compression unit (3121) is made up of 3 sections of compressors (3121a) and cooler (3121b), but this is one Embodiment, compression unit (3121) can be according to the different pressure conditions and temperature of engine calls, by multiple compressors and cooling Machine forms.
Meanwhile the front end of the compression unit (3121) on boil-off gas supply line (3120), it can set what is be described below The heat-exchange device (3132) of re-liquefied line (3130), this will will be described in detail below.
Re-liquefied line (3130) may include the presser unit for being further forced through the boil-off gas of compression unit (3131) (3131), the heat-exchange device (3132) of heat exchange and cooling will be carried out, by by the boil-off gas of presser unit (3131) The expansion valve (3133) that is depressurized through the boil-off gas by the heat-exchange device, accommodate by expansion valve (3133) Re-liquefied boil-off gas gas-liquid separator (3134), will from gas-liquid separator (3134) separate liquid component evaporation The exhausting line 3135 and the steaming for the gas componant that will be separated from gas-liquid separator (3134) that gas resupplies to holding vessel (3110) Get angry the re-circulation line (3136) that body supplies to holding vessel (3110) or boil-off gas supply line (3120).
Re-liquefied line (3130) can be branched off from compression unit (3121) rear end on boil-off gas supply line (3120) Formed.In the bifurcation of re-liquefied line (3130) and boil-off gas supply line (3120), triple valve (not shown) can be set, three Port valve can adjust the boil-off gas quantity delivered to the 1st engine or re-liquefied line (3130) supply.Triple valve can be by operator It is manually operated, with the degree of the opening and closing of controlling switch and opening and closing, or can be automatic by controller (not shown) Operation, to control the operation.
Presser unit (3131) is arranged to further compress the boil-off gas by compression unit (3121).Pressurization is single First (3131) are by the compressor (3131a) that is further compressed the boil-off gas by compression unit (3121) and will be compressed Cooler (3131) b compositions that the boil-off gas of heating is cooled down.
Presser unit (3131) will can be supplied to behind the heat-exchange device to be described (3132) and expansion valve (3133) Boil-off gas is pressurized to 50bar to 150bar pressure limit.Boil-off gas is pressurized to 50bar to 150bar pressure limit When being cooled down and depressurized again, the re-liquefied of boil-off gas is very easy to, therefore presser unit (3131) can be according to being supplied to hair The different condition of the pressure condition of the boil-off gas of motivation, you can with according to the pressure strip for improving re-liquefied efficiency or re-liquefied amount Part is further pressurizeed to boil-off gas.
Fig. 5 is illustrated, and presser unit (3131) is made up of 1 compressor (3131a) and cooler (3131) b, But quantity is not limited thereto, if boil-off gas can be pressurized to 50bar to 150bar pressure limit, it is more use can be included The situation of individual compressor and cooler composition.
Heat-exchange device (3132) is arranged to make by the boil-off gas that presser unit (3131) is pressurized with passing through evaporation The boil-off gas of compression unit (3121) front end of gas feed line (3120) carries out heat exchange.Pass through the steaming of presser unit (3131) Body of getting angry is pressurizeed by compressor (3131a) and is in the state of temperature rising, with the pressure by boil-off gas supply line (3120) The mutual heat exchange of boil-off gas of low temperature before contracting portion (3121), can cool down the pressurized steaming by re-liquefied line (3130) Get angry body.As described above, without separately setting cooling device, by the boil-off gas being pressurized by presser unit (3131) and pass through steaming The boil-off gas of hair gas feed line (3120) carries out heat exchange and cooled down, and can prevent unnecessary power supply from wasting and improving to set Standby operation efficiency.
Expansion valve (3133) may be provided at the rear end of heat-exchange device (3132).Expansion valve (3133) can will pass through pressurization The boil-off gas of the pressurization cooling of unit (3131) and heat-exchange device (3132) depressurize and further cooling expansion, makes steaming Body of getting angry is re-liquefied.Expansion valve (3133) can be for example made up of Joule-Thomson valve (Joule-Thomson Valve).
Gas-liquid separator (3134) accommodates re-liquefied by the re-liquefied boil-off gas of expansion valve (3133), separation Boil-off gas gas componant and liquid component.When the boil-off gas of pressurization is by expansion valve (3133), most evaporation Gas is re-liquefied, but because producing flash gas, it is possible to create the gas componant of re-liquefied boil-off gas.Therefore from gas-liquid point From the liquid component of the re-liquefied boil-off gas of device (3134) separation, storage is supplied to by the exhausting line 3135 to be described below again Deposit tank (3110), the gas componant of the re-liquefied boil-off gas of separation, by the re-circulation line to be described below (3136) again It is supplied to holding vessel (3110) or boil-off gas supply line (3120).
Exhausting line 3135 is in order to which the liquid component of boil-off gas that will be separated from gas-liquid separator (3134) is to holding vessel (3110) resupply, be arranged to connect gas-liquid separator (3134) and holding vessel (3110).The arrival end and gas of exhausting line 3135 The lower end connection of liquid/gas separator (3134), the port of export are connected with the inside of holding vessel (3110).It can be set on exhausting line 3135 Adjust the switch valve (not shown) of the re-liquefied boil-off gas quantity delivered reclaimed to holding vessel (3110).
Re-circulation line (3136) in order to will from gas-liquid separator (3134) separate re-liquefied boil-off gas gas into Divide and be supplied to holding vessel (3110) or boil-off gas supply line (3120) again, be arranged to connect gas-liquid separator (3134) and holding vessel (3110) or connection gas-liquid separator (3134) with boil-off gas supply line (3120).Re-circulation line (3136) diagram in Fig. 5 For the boil-off gas of the internal gas componant of gas-liquid separator (3134) to be supplied to the compression of boil-off gas supply line (3120) again The front end in portion (3121), in addition to the situation, it should also include being supplied to holding vessel (3110) or same again from gas-liquid separator (3134) When be supplied to the situation of boil-off gas supply line (3120) and holding vessel (3110) again.
The liquefied natural gas that liquefied gas supplying line (3140) is arranged to accommodate holding vessel (3110) or store is as combustion Gas supplies to engine.Liquefied gas supplying line (3140) may be configured as the inside that one end is connected to holding vessel (3110), another End merges with the boil-off gas supply line (3120) to be described below is connected to engine.Liquefied gas supplying line (3140) enter Mouth end is arranged on the interior lower end of holding vessel (3110), in order to which delivery pump can be set to engine side supply liquefied natural gas (3141)。
As it was previously stated, if engine is by being provided the 1st engine of relatively high pressure combustion gas and power output and being provided 2nd cluster engine of relatively low pressure combustion gas and power output into when, liquefied gas supplying line (3140) can be arranged to include the 1st Liquefied gas supplying line (3140a) and the 2nd liquefied gas supplying line (3140b), at the combustion gas requirement according to each engine Manage liquid gas.
The liquefied natural gas conveyed by delivery pump (3141) can be supplied to by the 1st liquefied gas supplying line (3140a) to be needed To use the 2nd engine of relatively low pressure combustion gas and power output.During delivery pump (3141) transportation of liquefied natural gas Liquefied natural gas is compressed to low pressure (about 5bar to 8bar), the 2nd engine by DFDE cluster engines into when, without separately setting pressurization Pump, the liquefied natural gas forced vaporization that vaporizer (3144) will can also be conveyed by delivery pump (3141), and start according to the 2nd The combustion gas condition supply combustion gas that machine needs.
The rear end of vaporizer (3144) can set gas-liquid separator (3145).2nd engine by DFDE cluster engines into When, combustion gas, which needs to be produced with gaseous state supply, stably to be exported and prevents engine breakdown.Therefore vapour will be passed through The liquefied natural gas for changing device (3144) is supplied to gas-liquid separator (3145), and from gas-liquid separator (3145) only by gaseous state Combustion gas is supplied to the 2nd engine, so as to improve the Reliability of the gas supply system of ship (3100).
The liquefied natural gas conveyed by delivery pump (3141) can be supplied to by the 2nd liquefied gas supplying line (3140b) to be needed To use the 1st engine of relatively high pressure combustion gas and power output.Therefore, it can be set on the 2nd liquefied gas supplying line (3140b) Compress and liquefy the force (forcing) pump (3142) of natural gas.The pressure condition for the combustion gas that force (forcing) pump (3142) can need according to the 1st engine Compress and liquefy natural gas, for example, the 1st engine by X-DF cluster engines into when, force (forcing) pump (3142) can compress liquefied natural gas Supplied to about 16bar to 18bar pressure condition.The liquefied natural gas compressed by force (forcing) pump (3142) passes through vaporizer (3143) after being forced vaporization, merge with boil-off gas supply line (3120), the 1st engine is supplied to as combustion gas.
Meanwhile because force (forcing) pump (3142) need repairing maintenance or force (forcing) pump (3142) load aggravate need to cut off the electricity supply when, If cutting off the power supply of force (forcing) pump (3142) immediately, the liquefied natural gas compressed be present and force (forcing) pump (3142) or other compositions are made Cause the failure of force (forcing) pump (3142) or the hidden danger of other security incidents into influence.And force (forcing) pump (3142) also be present needs to tie up Repair maintenance or force (forcing) pump (3142) load aggravates needs and cut off the electricity supply, but still require that the situation for maintaining engine continuous work.
Therefore, by-pass line (3140c) can be set on the 2nd liquefied gas supplying line (3140b).By-pass line (3140c) Arrival end be connected to the 2nd liquefied gas supplying line (3140b) force (forcing) pump (3142) front end, the port of export is connected to the 2nd liquid Change the rear end of the force (forcing) pump (3142) of gas feed line (3140b), and other force (forcing) pump (3142) is set, make force (forcing) pump (3142) connection side by side.
By setting the another by-pass line (3140c) for setting force (forcing) pump (3142), multiple force (forcing) pumps (3142) are in the 2nd liquid gas Arranged in parallel on supply line (3140b), therefore even if in the previous case, be also possible to prevent force (forcing) pump (3142) failure or its He occurs security incident, and can realize engine long time continuous firing.
Oil removing portion (3150), which is arranged to remove, flows into or is supplied to oil contained in the boil-off gas of re-liquefied line (3130).
In the compression unit (3121) of boil-off gas supply line (3120) and the presser unit (3131) of re-liquefied line (3130) In compressor (3121a and 131a) work when use the oil such as lubricating oil (Lubrication Oil).This oil helps to compress The even running of machine and effective pressure process, but mixed in the pressure process of boil-off gas with boil-off gas, and in liquid again Change in the pipeline such as line or the equipment such as expansion valve in accumulate, hinder boil-off gas smoothly to transmit or cause equipment fault, particularly dislike Change the composition quality of re-liquefied boil-off gas.
Therefore oil removing portion (3150) can be arranged on the rear end of the compression unit (3131) of re-liquefied line (3130), remove warp Lubricating oil contained in the boil-off gas of the compressor of overcompression portion (3121) and presser unit (3131) (3121a and 131a) etc. Oil.With this, ensure the stability of even running and the equipment operation of ship gas supply system (3100), evaporation can be improved again The composition quality of gas and liquefied natural gas.Oil removing portion (3150) can include but is not limited to filter or filter membrane, and can By in a manner of various or the device of form is formed.
Fig. 6 is the concept map of the related ship gas supply system (4100) of the 6th embodiment of the present invention.
Reference picture 6, the related ship gas supply system (4100) of the 6th embodiment of the invention include holding vessel (4110) boil-off gas of holding vessel (4110), is supplied to the liquefied gas supplying line (4140) of engine, boil-off gas will be passed through The part boil-off gas of body supply line (4120) carries out re-liquefied re-liquefied line (4130) and the liquefaction by holding vessel (4110) Gas is supplied to the liquefied gas supplying line (4140) of engine.
Holding vessel (4110) is used to accommodating or storing liquefied natural gas and boil-off gas.In order that outside heat intrusion causes Liquefied natural gas vaporization minimizes as far as possible, and holding vessel (4110) can be the film-type cargo hold by heat-insulated processing.Holding vessel (4110) liquefied natural gas is supplied to from grown place of natural gas etc., is accommodated or stored, be until arriving at unloading Only liquefied natural gas and boil-off gas are carried out stablizing keeping, as described below, the driving that can also use it for ship is used The combustion gas of the dynamo engine of engine or ship.
Holding vessel (4110) is typically thermally insulated, however, blocking outside heat intrusion to be virtually impossible to completely , therefore will have liquefied natural gas in holding vessel (4110) and vaporize and caused boil-off gas naturally.Because such steaming Body of getting angry can improve holding vessel (4110) internal pressure so as to there is the danger of the deformation for triggering holding vessel (4110) and blast, It is necessary that boil-off gas is removed and handled from holding vessel (4110).Therefore boil-off gas caused by holding vessel (4110) inside is such as The embodiment of the present invention, the combustion gas that engine can be used as by boil-off gas supply line (4120) use or by re-liquefied line (4130) it is supplied to after re-liquefied in holding vessel (4110).It is different from methods described, although not shown in drawing, storage can also be passed through The exhaust mast (not shown) that there is provided on the upside of tank (4110) is provided or will be steamed by GCU (Gas combustion Unit, not shown) Body of getting angry is further processed or consumed.
Engine can be supplied to the combustion gas such as the liquefied natural gas for being contained in holding vessel (4110) and boil-off gas, and by its For producing the driving force of ship or generating power supply for producing ship internal unit.Engine can be relative by being provided 1st engine of high-pressure gas and power output and be provided relatively low pressure combustion gas simultaneously power output the 2nd cluster engine into. For example, the 1st engine can be by being formed using the X-DF engines (about 16bar to 18bar) of high-pressure gas power output, the 2nd hair Motivation can be by being formed using the DFDE engines (about 5bar to 8bar) of low-pressure fuel gas power output.However, the invention is not restricted to This, using various quantity engine and various species engine when should also be understood in the same manner.
Boil-off gas supply line (4120) is used to caused boil-off gas in holding vessel (4110) being supplied to as combustion gas 1st engine.One end of boil-off gas supply line (4120) is connected with the inside of holding vessel (4110), and the other end is with will be detailed below The liquefied gas supplying line (4140) of description is connected after merging with the 1st engine.Boil-off gas supply line (4120) in order to The boil-off gas being supplied to inside holding vessel (4110), its arrival end are arranged on the internal upside of holding vessel (4110), in order to incite somebody to action The boil-off gas being supplied to is adjusted to the pressure and temperature conditionss of engine calls, also comprising the compression unit for possessing multiple compressors (4121)。
Compression unit (4121) includes the compressor (4121a) of Compression Evaporation gas and will entered by the boil-off gas of compression heating The cooler (4121b) of row cooling.Compression unit (4121) is arranged on boil-off gas supply line (4120), and will be retouched below The front end for the position that the re-liquefied line (4130) stated is branched off, is pressurizeed to boil-off gas.If engine is by with multiple Multiple cluster engines of different pressures condition are into such as Fig. 6, boil-off gas supply line can be from the center section of compression unit (4121) Further branch supplies combustion gas to the 2nd engine.
In Fig. 6, compression unit (4121) is made up of 3 sections of compressors (4121a) and cooler (4121b), but this is one Embodiment, compression unit (4121) can be according to the different pressure conditions and temperature of engine calls, by multiple compressors and cooling Machine forms.
Meanwhile the front end of the compression unit (4121) on boil-off gas supply line (4120), it can set what is be described below The cooling end (4132) of re-liquefied line (4130), this will will be described in detail below.
Re-liquefied line (4130) may include the presser unit for being further forced through the boil-off gas of compression unit (4131) (4131) cooling end (4132) that, is cooled down the boil-off gas by presser unit (4131), by by described cold But the boil-off gas of portion (4132) carries out the 1st expansion valve (4133) of the 1st decompression, receiving passes through the 1st expansion valve (4133) the 1st gas-liquid separator (4134) of the boil-off gas of gas-liquid mixture phase, will be from the 1st gas-liquid separator (4134) point From gas componant be supplied to the boil-off gas circular route (4135) of the 2nd engine and will be separated from the 1st gas-liquid separator (4134) The 2nd expansion valve (4136) that is depressurized again of liquid component, will pass through the gas-liquid mixture phase of the 2nd expansion valve (4136) Boil-off gas be separated into the 2nd gas-liquid separator (4137) of gas componant and liquid component, will be from the 2nd gas-liquid separator (4137) the boil-off gas exhausting line that the gas componant of separation supplies to holding vessel (4110) or boil-off gas supply line (4120) (4138) liquid gas that the liquid component separated from the 2nd gas-liquid separator (4137), is supplied to holding vessel (4110) again reclaims Line (4139).
Re-liquefied line (4130) can be from the rear end branch shape of the compression unit (4121) on boil-off gas supply line (4120) Into.The bifurcation of re-liquefied line (4130) and boil-off gas supply line (4120) can set behind the flow control valve to be described 4161, this is illustrated more detail below.
Presser unit (4131) is arranged to the boil-off gas to being supplied by compression unit (4121) to re-liquefied line (4130) Further compressed.Presser unit (4131) is by the pressure of further being compressed the boil-off gas by compression unit (4121) Contracting machine (4131a) and cooler (4131b) composition that will be cooled down by the boil-off gas of compression heating.
The boil-off gas for being supplied to re-liquefied line (4130) can be pressurized to 50bar to 150bar's by presser unit (4131) Pressure limit.When boil-off gas being pressurized into 50bar to 150bar pressure limit being cooled down and depressurized again, boil-off gas It is re-liquefied to be very easy to, therefore presser unit (4131) can be according to the pressure condition of the re-liquefied efficiency of raising or re-liquefied amount to steaming Body of getting angry further is pressurizeed.
Fig. 6 illustrates presser unit (4131) and is made up of 1 compressor (4131a) and a cooler (4131b), but number Amount is not limited thereto, if boil-off gas can be pressurized to 50bar to 150bar pressure limit, can be included with multiple pressures The situation of contracting machine and cooler composition.
Cooling end (4132) be arranged to by presser unit (4131), the boil-off gas that is further pressurizeed carry out it is cold But.Cooling end (4132) could be arranged to by the boil-off gas of presser unit (4131) and by boil-off gas supply line (4120) transmission compression unit (4121) front end boil-off gas and to be described below by boil-off gas circular route (4135) gas componant from the separation of the 1st gas-liquid separator (4134) of transmission carries out the heat-exchange device of heat exchange.By adding The state for pressing the boil-off gas of unit (4131) to be pressurizeed and risen in temperature by compression unit (4121) and presser unit (4131), Circulated with the boil-off gas of the low temperature before the compression unit (4121) by boil-off gas supply line (4120) and by boil-off gas The gas componant of the low temperature of line (4135) transmission carries out heat exchange, can cool down being added by the high temperature of re-liquefied line (4130) The boil-off gas of pressure., can be to prevent without separately setting cooling device as described above, cooling end (4132) is arranged into heat-exchange device Only unnecessary power supply wastes, and can simplify equipment and improve the operation efficiency of equipment.
1st expansion valve (4133) may be provided at the rear end of cooling end (4132).1st expansion valve (4133) can will be by cold But the boil-off gas of the pressurization of portion (4132) carries out the 1st decompression and cools down expansion, makes boil-off gas re-liquefied.1st expansion valve (4133) can be for example made up of Joule-Thomson valve (Joule-Thomson Valve).1st expansion valve (4133) can incite somebody to action The boil-off gas cooled down by cooling end (4132) enters according to the corresponding stress level of gaseous-pressure condition of the 2nd engine calls Row decompression.On the other hand, illustrate more detail below.
1st gas-liquid separator (4134) mixes the 1st gas-liquid for cooling down and depressurizing by the 1st expansion valve (4133) The boil-off gas of conjunction state is separated into gas componant and liquid component.When the boil-off gas of cooling is by the 1st expansion valve (4133) Further cooling and decompression, it is re-liquefied, but the process depressurized can produce flash gas (Flash Gas).Therefore it is swollen by the 1st Swollen valve (4133) is accommodated as the boil-off gas of gas-liquid mixture phase by the 1st gas-liquid separator (4134) afterwards, and is separated into gas Composition and liquid component, improve the Reliability of re-liquefied engineering, and handle various composition respectively.
Natural gas is in addition to containing main component methane (Methane), also containing ethane (Ethane), propane (Propane), the mixture of butane (Butane), nitrogen (Nitrogen) etc..Wherein, the boiling point of nitrogen is about -195.8 Celsius Degree, than other compositions methane (boiling point：- 161.5 degrees Celsius) and ethane (boiling point：- 89 degrees Celsius) it is much lower.Due to nitrogen component Boiling point is very low, and holding vessel vaporizes and caused boil-off gas naturally in (4110), contains because of the relatively large amount evaporation of nitrogen component elder generation Substantial amounts of nitrogen component, exist with the increase of nitrogen content in boil-off gas, the problem of re-liquefied efficiency of boil-off gas reduces.
Especially for boil-off gas it is re-liquefied by compression unit (4121) and presser unit (4131) to boil-off gas Pressurizeed, after being depressurized by cooling end (4132) to pressurized boil-off gas, by the 1st expansion valve (4133) to quilt When the boil-off gas of pressurization is depressurized, also have in the gas componants such as the flash gas of the 1st gas-liquid separator (4134) separation The lower boiling nitrogen component of high concentration.By the gas componant of the nitrogen component containing high concentration again in gas supply system (4100) During circulation, not only make the re-liquefied efficiency of boil-off gas reduce, can also cause because of the gas componant of circulation to compression unit (4121) Compressor (4121a) produce load or need to set the compressor (4121a) of higher configuration, make equipment with losing efficiency.
Boil-off gas circular route (4135) separates from the 1st gas-liquid separator (4134), by the nitrogen component containing high concentration Gas componant is supplied to the 2nd engine as combustion gas.As before told, pass through the 1st expansion valve (4133), the boil-off gas for the pressurization that is cooled Body, the nitrogen component containing high concentration in caused gas componant during being depressurized.Therefore boil-off gas circular route (4135) the low gas componant of the re-liquefied efficiency being provided is supplied to the 2nd engine as combustion gas, realizes effective profit of combustion gas With while, improve the liquid component containing relative lower concentration nitrogen component separated by the 1st gas-liquid separator (4134) Re-liquefied efficiency.
The boil-off gas that 1st expansion valve (4133) is arranged to be pressurized by cooling end (4132) is according to the 2nd engine The corresponding level of required pressure condition is depressurized, therefore boil-off gas circular route (4135) also may be used without separately setting compression set With the gas ingredients for separating the 1st gas-liquid separator (4134) the 2nd engine is supplied to directly as combustion gas.
Boil-off gas circular route (4135) is arranged through the cooling end (4132) being made up of heat-exchange device.Using along The cold and hot amount of the gas componant containing high concentration N composition of boil-off gas circular route (4135) flowing, is cooled down along re-liquefied line (4130) while the pressurized boil-off gas of the high temperature of flowing, the quilt of the high temperature along re-liquefied line (4130) flowing is received The heat of the boil-off gas of pressurization, the temperature of the gas componant flowed along boil-off gas circular route (4135) is brought up to the 2nd The temperature conditionss of the combustion gas of engine calls are horizontal accordingly.
Boil-off gas circular route (4135) could be arranged to close with the branch point of steam gas supply line 4120 as shown in Figure 6 And but and be not so limited, directly can also be directly connected to the 2nd engine, using gas componant as fuel gas supply.
, can be by the 2nd expansion by the liquid component of the nitrogen component containing low concentration of the 1st gas-liquid separator (4134) separation The 2nd decompression of valve (4136) progress is simultaneously re-liquefied.As it was previously stated, lower containing nitrogen component, the re-liquefied efficiency of boil-off gas is got over Height, because the liquid component of the 1st gas-liquid separator (4134) separation contains NITROGEN IN LOW CONCENTRATION composition, even if passing through the 2nd expansion valve (4136) generation for carrying out the gas componants such as the 2nd decompression, flash gas is reduced, and re-liquefied efficiency improves.2nd expansion valve (4136) can be for example made up of Joule-Thomson valve (Joule-Thomson Valve), the 2nd expansion valve (4136) can be by Depressurized according to the stress level for the internal pressure for meeting holding vessel (4110).
2nd gas-liquid separator (4137) mixes the 2nd gas-liquid for cooling down and depressurizing by the 2nd expansion valve (4136) The boil-off gas of conjunction state is separated into gas componant and liquid component.The 1st gas further depressurized by the 2nd expansion valve (4136) The liquid component of liquid/gas separator (4134) contains the nitrogen component of low concentration, most of re-liquefied, but still suffer from a small amount of nitrogen into Point, it is completely re-liquefied to be practically impossible.Therefore, the evaporation of the gas-liquid mixture phase of the 2nd expansion valve (4136) is passed through Gas can improve the Reliability of re-liquefied engineering by the 2nd gas-liquid separator (4137) separates gas components and liquid component, And various composition is handled respectively.
Boil-off gas exhausting line (4138) is supplied to again in order to the gas componant for separating the 2nd gas-liquid separator (4137) Holding vessel (4110) or boil-off gas supply line (4120), be arranged on the 2nd gas-liquid separator (4137) and holding vessel (4110) it Between or be arranged between the 2nd gas-liquid separator (4137) and boil-off gas supply line (4120).In Fig. 6, boil-off gas exhausting line (4138) gas componant of the 2nd gas-liquid separator (4137) is supplied to the compression unit (4121) of boil-off gas supply line 4120 again Front end, in addition, it should also include being supplied to holding vessel (4110) again from the 2nd gas-liquid separator (4137) or being supplied to evaporation again simultaneously The situation of gas feed line (4120) and holding vessel (4110).
Liquid gas exhausting line (4139) is supplied to storage again for the liquid component for separating the 2nd gas-liquid separator (4137) Tank (4110), it is arranged between the 2nd gas-liquid separator (4137) and holding vessel (4110).Liquid gas exhausting line (4139) enter Mouth end can connect with the lower end of the 2nd gas-liquid separator (4137), and the port of export can be with the inside UNICOM of holding vessel (4110).Liquid Switch valve (not shown) can be set by changing on gas exhausting line (4139), the re-liquefied liquefaction of regulation holding vessel (4110) recovery The quantity delivered of natural gas.
The liquefied natural gas that liquefied gas supplying line (4140) is arranged to accommodate holding vessel (4110) or store is as combustion Gas supplies to engine.Liquefied gas supplying line (4140) may be configured as the inside that one end is connected to holding vessel (4110), another End is connected respectively to the 1st engine and the 2nd engine after merging with the boil-off gas supply line (4120) to be described below.Liquefaction The arrival end of gas feed line (4140) is arranged on the interior lower end of holding vessel (4110), in order to supply liquefaction day to engine side Right gas, delivery pump (4141) can be set.
As it was previously stated, if engine is by being provided the 1st engine of relatively high pressure combustion gas and power output and being provided 2nd cluster engine of relatively low pressure combustion gas and power output into when, liquefied gas supplying line (4140) can be arranged to include the 1st Liquefied gas supplying line (4140a) and the 2nd liquefied gas supplying line (4140b), at the combustion gas requirement according to each engine Manage liquid gas.
The liquefied natural gas conveyed by delivery pump (4141) can be supplied to by the 1st liquefied gas supplying line (4140a) to be needed To use the 2nd engine of relatively low pressure combustion gas and power output.During delivery pump (4141) transportation of liquefied natural gas Liquefied natural gas is compressed to low pressure (about 5bar to 8bar), the 2nd engine by DFDE cluster engines into when, without separately setting pressurization Pump, the liquefied natural gas forced vaporization that vaporizer (4144) will can also be conveyed by delivery pump (4141), and start according to the 2nd The combustion gas condition supply combustion gas that machine needs.
The rear end of vaporizer (4144) can set gas-liquid separator (4145).2nd engine by DFDE cluster engines into When, combustion gas, which needs to be produced with gaseous state supply, stably to be exported and prevents engine breakdown.Therefore vapour will be passed through The liquefied natural gas for changing device (4144) is supplied to gas-liquid separator (4145), from gas-liquid separator (4145) only by the combustion of gaseous state Gas is supplied to the 2nd engine, so as to improve the Reliability of the gas supply system of ship (4100).
The liquefied natural gas conveyed by delivery pump (4141) can be supplied to by the 2nd liquefied gas supplying line (4140b) to be needed To use the 1st engine of relatively high pressure combustion gas and power output.Therefore, it can be set on the 2nd liquefied gas supplying line (4140b) Compress and liquefy the force (forcing) pump (4142) of natural gas.The pressure condition for the combustion gas that force (forcing) pump (4142) can need according to the 1st engine Compress and liquefy natural gas, for example, the 1st engine by X-DF cluster engines into when, force (forcing) pump (4142) can compress liquefied natural gas Supplied to about 16bar to 18bar pressure condition.The liquefied natural gas compressed by force (forcing) pump (4142) passes through vaporizer After 4143 are forced vaporization, merge with boil-off gas supply line (4120), the 1st engine is supplied to as combustion gas.
Meanwhile because force (forcing) pump (4142) need repairing maintenance or force (forcing) pump (4142) load aggravate need to cut off the electricity supply when, If cutting off the power supply of force (forcing) pump (4142) immediately, the liquefied natural gas compressed be present and force (forcing) pump (4142) or other compositions are made Cause the failure of force (forcing) pump (4142) or the hidden danger of other security incidents into influence.And force (forcing) pump (4142) also be present needs to tie up Repair maintenance or force (forcing) pump (4142) load aggravates needs and cut off the electricity supply, but still require that the situation for maintaining engine continuous work.
Therefore, by-pass line (4140c) can be set on the 2nd liquefied gas supplying line (4140b).By-pass line (4140c) Arrival end be connected to the 2nd liquefied gas supplying line (4140b) force (forcing) pump (4142) front end, the port of export is connected to the 2nd liquid Change the rear end of the force (forcing) pump (4142) of gas feed line (4140b), and other force (forcing) pump (4142) is set, make force (forcing) pump (4142) connection side by side.
By setting the another by-pass line (4140c) for setting force (forcing) pump (4142), multiple force (forcing) pumps (4142) are in the 2nd liquid gas Arranged in parallel on supply line (4140b), therefore even if in the previous case, be also possible to prevent force (forcing) pump (4142) failure or its He occurs security incident, and can realize engine long time continuous firing.
The related ship gas supply system (4200) of the 7th embodiment to the present invention illustrates below.
In the explanation of the related ship gas supply system (4200) of the 7th embodiment described below to the present invention, remove Increase is another to be set except in the case of drawing code illustrates, the ship fuel gas supply related to foregoing the 6th embodiment of the invention The explanation of system (4100) is identical, in order to prevent content from repeating to omit related description herein.
Fig. 7 is the concept map of the related ship gas supply system (4200) of the 7th embodiment of the present invention.Reference picture 7, this The related ship gas supply system (4200) of 7th embodiment of invention includes holding vessel (4110), by holding vessel (4110) Boil-off gas is supplied to the liquefied gas supplying line (4140) of engine, will evaporated by the part of boil-off gas supply line (4120) Gas carries out re-liquefied re-liquefied line (4130) and the liquid gas of holding vessel (4110) is supplied to the liquid gas of engine Supply line (4140), for the boil-off gas for being supplied to re-liquefied line (4130) to be separated into the 1st gas containing the 1st concentration nitrogen component Body stream and the nitrogen separator (4250) of the 2nd gas stream containing the 2nd concentration nitrogen component, measure and adjust the combustion gas for being supplied to engine The caloric value adjustment portion of caloric value.
Nitrogen separator (4250) is arranged to be separated the nitrogen component being supplied in the boil-off gas of re-liquefied line (4130).
Nitrogen separator (4250) can be arranged on the front end of the presser unit (4131) on re-liquefied line (4130).Nitrogen separates The boil-off gas for flowing into or being supplied to re-liquefied line (4130) is separated into the 1st gas containing the 1st concentration nitrogen component by device (4250) Stream and the 2nd gas stream containing the 2nd concentration nitrogen component, the 1st gas stream merge with boil-off gas supply line (4120) or as combustions Gas is supplied to the 1st engine, and the 2nd gas stream is directly supplied to the presser unit (4131).
The nitrogen component of the 1st concentration and the nitrogen component of the 2nd concentration illustrated in the present embodiment, represent high concentration nitrogen component and The nitrogen component of low concentration, the nitrogen component of the 1st concentration nitrogen component containing higher concentration compared with the nitrogen component of the 2nd concentration, the 2nd is dense The nitrogen component of degree nitrogen component containing lower concentration compared with the nitrogen component of the 1st concentration.1st concentration and the 2nd concentration are not limited to spy Fixed number value, it is thus understood that the concentration difference between the 1st concentration and the 2nd concentration and caused relative meaning.
Natural gas is in addition to containing main component methane (Methane), also containing ethane (Ethane), propane (Propane), the mixture of butane (Butane), nitrogen (Nitrogen) etc..Wherein, the boiling point of nitrogen is about -195.8 Celsius Degree, than other compositions methane (boiling point：- 161.5 degrees Celsius) and ethane (boiling point：- 89 degrees Celsius) it is much lower.Therefore, boil-off gas The concentration of the nitrogen component of the low boiling point contained in body is higher, and re-liquefied efficiency is lower.
Nitrogen separator (4250) will be flowed into or be supplied to the steaming of re-liquefied line (4130) by boil-off gas supply line (4120) The nitrogen component got angry in body is separated, and the 1st gas stream containing relatively high concentration of 1st concentration nitrogen component passes through boil-off gas Body resupplies line (4251) and merged with boil-off gas supply line (4120), or as combustion gas be supplied to the 1st engine consume nitrogen into Point, the 2nd gas stream of the 2nd concentration nitrogen component containing relatively low concentration is directly re-liquefied by re-liquefied line (4130) process Process, so as to improve the re-liquefied performance and efficiency of re-liquefied line (4130).
Nitrogen separator (4250) can be included in membrane filter, cyclone separator, gas centrifuge and vortex tube extremely It is few one.
Membrane filter has the material for having high-affinity with nitrogen component, and pressurized boil-off gas is because its pressure is through thin Film filter, the 1st gas stream of the nitrogen component containing high concentration are retained by membrane filter, and line is resupplied by boil-off gas (4251) boil-off gas supply line (4120) or the 1st engine are transported to, the 2nd of composition such as methane beyond the nitrogen containing high concentration Gas stream is directly through filter and is supplied to the presser unit (4131) of re-liquefied line (4130).
The boil-off gas that cyclone separator (Cyclone) will be supplied to nitrogen separator (4250) forms eddy flow, in boil-off gas Upper effect centrifugal force, composition such as methane and ethane beyond nitrogen component and nitrogen are separated, boil-off gas is separated into containing relatively highly concentrated Degree is the 1st gas stream of the 1st concentration nitrogen component and is the 2nd gas stream of the 2nd concentration nitrogen component containing relative lower concentration.
Gas centrifuge (Gas centrifuge) is arranged to separate a part of mixed gas by centrifugal separation The composition of state, pressurized boil-off gas.Gas centrifuge can will be supplied to nitrogen separation device 4250 by centrifugal force Boil-off gas be separated into composition beyond nitrogen component and nitrogen component, so as to which boil-off gas is separated into the 1st gas stream and the 2nd gas Body stream.
Vortex tube (Vortex tube) is a kind of device with narrow pipe, and it is carried by the tangential direction into narrow pipe road Come separating high-temp air-flow and low-temperature airflow for gases at high pressure.When nitrogen separator (4250) is made up of vortex tube, boil-off gas conveying Separated in vortex tube beyond the nitrogen such as nitrogen component and the of a relatively high methane of boiling point, the ethane of the relatively low low temperature of boiling point into Point, make boil-off gas be separated into the 1st gas stream and with the 2nd gas stream.
As described above, nitrogen separator (4250) could be arranged to comprising membrane filter, cyclone separator, gas centrifuge With it is at least one in vortex tube, the boil-off gas for being supplied to re-liquefied line (4130) is separated into the 1st according to the concentration of nitrogen component Gas stream and the 2nd gas stream, the 2nd gas stream containing NITROGEN IN LOW CONCENTRATION composition is directly subjected to liquid again by re-liquefied line (4130) Chemical industry journey, so as to improve the re-liquefied efficiency of re-liquefied line (4130).At the same time, the 1st gas containing high concentration N composition Circulation pervaporation gas resupplies line (4251) and merged with boil-off gas supply line (4120), or is directly supplied to and starts as combustion gas Machine consumes nitrogen component, the nitrogen total content in gas supply system 4200 is gradually reduced with this, there is provided equipment efficiency of operation.
In Fig. 7, the port of export that boil-off gas resupplies line (4251) is illustrated as closing again with boil-off gas supply line (4120) And but if being directly supplied to engine, the position of its port of export can have a variety of changes.
Caloric value adjustment portion can measure and adjust the combustion gas caloric value for being supplied to engine especially the 1st engine.
Caloric value (Heating value) refers to the heat discharged during unit combustion gas completely burned.The first in natural gas Alkane, butane and propane have higher caloric value, are composition (the methane caloric values for the caloric value for increasing combustion gas：About 12,000kcal/ Kg, butane caloric value：About 11,863kcal/kg, propane caloric value：2,000kcal/kg), very low (the nitrogen heating of nitrogen caloric value Amount：About 60kcal/kg), therefore the absolute content of nitrogen component or concentration are higher, the gross calorific power of combustion gas is lower.Provided that give The gross calorific power of the combustion gas of engine is too low, it is impossible to meets the minimum caloric value needed for engine, it can influence the defeated of engine Go out, and unnecessary load is brought to engine.
As it was previously stated, in order to improve the re-liquefied efficiency of re-liquefied line (4130), nitrogen separator (4250), which allows, to be flowed into or supplies To re-liquefied line (4130) boil-off gas in containing low concentration be the 2nd concentration nitrogen component the 2nd gas stream by and be supplied to again Liquefy line (4130), and is trapped containing the 1st gas stream that high concentration is a concentration nitrogen component and is supplied to boil-off gas supply line (4120) or engine, therefore the high concentration N composition contained due to the 1st gas stream be present, cause to the first supply started Misgivings of the combustion gas caloric value less than the caloric value condition that the 1st engine needs.
Reference picture 7, the caloric value adjustment portion of the ship gas supply system (4200) of the 7th embodiment of the invention include measurement And calculate the measurement of calorific value device (4260) for the combustion gas caloric value for being supplied to the 1st engine and adjust to re-liquefied line (4130) The flow control valve (4261) of the steam gas quantity delivered of supply.
Measurement of calorific value device (4260) can measure in real time to be supplied again by boil-off gas supply line (4120) or boil-off gas The combustion gas caloric value comprising boil-off gas and the 1st gas stream of the 1st engine is supplied to line (4251).Measurement of calorific value device (4260) by the combustion gas caloric value information of display unit (not shown) transmission measurement such as including display and it can notify that ship is superior The combustion gas caloric value of measurement is sent to controller (not shown) by visitor, and the controller can be by the way that the inputted the 1st be started The combustion gas caloric value information that the caloric value condition of machine is sent with measurement of calorific value device (4260) is analyzed, and control will be rear The opening and closing degree for the flow control valve (4261) that face is introduced.
Flow control valve (4261) can be arranged on re-liquefied line (4130) and be branched out from boil-off gas supply line (4120) The bifurcation come.Flow control valve (4261) can be triple valve (3way valve), adjust and supplied to re-liquefied line (4130) Boil-off gas quantity delivered, flow control valve (4261) can also pass through measurement of calorific value device (4260) measure combustion gas caloric value The caloric value conditional information of information and the 1st engine, it is manually operated or can be automatically brought into operation by controller to control it by operator Opening and closing degree.
For example, when the caloric value of the combustion gas of measurement of calorific value device (4260) measurement is less than the caloric value condition of the 1st engine, Flow control valve (4261) with Operation switch, can reduce the quantity delivered for the boil-off gas for being supplied to re-liquefied line (4130), and increase is straight Connect pervaporation gas feed line (4120) and the quantity delivered to the boil-off gas of the 1st engine is provided.With by being arranged on again The nitrogen separator (4250) of liquefaction line (4130) simultaneously resupplies the flow of the 1st gas stream of line (4251) supply to boil-off gas and subtracted It is few, the combustion gas caloric value supplied to the 1st engine can be increased.
In contrast, if the caloric value of the combustion gas of measurement of calorific value device (4260) measurement exceedes or fully meets that the 1st starts During the caloric value condition of machine, flow control valve (4261) can increase the boil-off gas for being supplied to re-liquefied line (4130) with Operation switch The quantity delivered of body, reduce and provide the quantity delivered to the boil-off gas of the 1st engine by boil-off gas supply line (4120).With Flow into re-liquefied line (4130) and resupply the 1st gas stream of line (4251) supply to boil-off gas by nitrogen separator (4250) Flow increase, the regulation of the caloric value of combustion gas can be arrived proper level, meanwhile, increase the pressurization list to re-liquefied line (4130) The 2nd gas stream flow of first (4131) supply, the re-liquefied amount of boil-off gas can be increased.
The related ship gas supply system (4300) of the 8th embodiment to the present invention illustrates below.
In the explanation of the related ship gas supply system (4300) of the 8th embodiment described below to the present invention, remove Increase is another to be set except in the case of drawing code illustrates, the ship fuel gas supply related to foregoing the 6th embodiment of the invention The explanation of system (4100) is identical, in order to prevent content from repeating to omit related description herein.
Fig. 8 is the concept map of the related ship gas supply system (4300) of the 8th embodiment of the present invention.Reference picture 8, this The related ship gas supply system (4200) of 8th embodiment of invention includes holding vessel (4110), by holding vessel (4110) Boil-off gas is supplied to the liquefied gas supplying line (4140) of engine, will evaporated by the part of boil-off gas supply line (4120) Gas carries out re-liquefied re-liquefied line (4130) and the liquid gas of holding vessel (4110) is supplied to the liquid gas of engine Supply line (4140), the oil removing portion for will be supplied to the oil contained in the boil-off gas of re-liquefied line (4130) and be removed (4350)。
Oil removing portion (4350), which is arranged to remove, flows into or is supplied to oil contained in the boil-off gas of re-liquefied line (4130).
In the compression unit (4121) of boil-off gas supply line (4120) and the presser unit (4131) of re-liquefied line (4130) In compressor (4121a and 131a) work when use the oil such as lubricating oil (Lubrication Oil).This oil helps to compress The even running of machine and effective pressure process, but mixed in the pressure process of boil-off gas with boil-off gas, and in liquid again Change in the pipeline such as line or the equipment such as expansion valve in accumulate, hinder boil-off gas smoothly to transmit or cause equipment fault, particularly dislike Change the composition quality of re-liquefied boil-off gas.
Therefore oil removing portion (4350) can be arranged on the rear end of the compression unit 4131 of re-liquefied line (4130), remove and pass through Lubricating oil contained in the boil-off gas of compression unit (4121) and the compressor of presser unit (4131) (4121a and 131a) etc. Oil.With this, ensure the stability of even running and the equipment operation of ship gas supply system (4100), evaporation can be improved again The composition quality of gas and liquefied natural gas.Oil removing portion (4350) can include but is not limited to filter or filter membrane, and can By in a manner of various or the device of form is formed.
The present invention is used as to refer to by the embodiment of accompanying drawing and diagram to be illustrated, but this only represents demonstration, in the present invention The people with general knowledge is appreciated that various change or similar other embodiment is also all feasible in art. Therefore the real scope of the present invention should be determined by appended entitlement requests scope.

Claims (15)

1. a kind of gas supply system of ship, it is characterised in that including being made up of for accommodating liquid gas and boil-off gas Gas storage tank；The compression unit of boil-off gas comprising the holding vessel that pressurizes, and the boil-off gas of the compression unit will be passed through Body is supplied to the boil-off gas supply line of engine；Heat exchange and again liquid will be carried out by a part of boil-off gas of the compression unit The re-liquefied line changed；
The re-liquefied line include further pressurization by the presser unit of the boil-off gas of the compression unit, will be by described The boil-off gas of presser unit and the boil-off gas of the compression unit front end carry out the heat-exchange device of heat exchange, will passed through Expansion valve that the boil-off gas of the heat-exchange device is depressurized, it will pass through the re-liquefied boil-off gas of the expansion valve Body is separated into the gas-liquid separator of gas componant and liquid component.
2. the gas supply system of ship according to claim 1, it is characterised in that also described re-liquefied including being arranged on The nitrogen separator of the presser unit front end on line, for the boil-off gas for being supplied to the re-liquefied line to be separated into containing The 1st gas stream and the 2nd gas stream containing the 2nd concentration nitrogen component of 1 concentration nitrogen component, the 1st gas stream are supplied to the steaming Hair gas feed line or the engine, the 2nd gas stream are supplied to the presser unit.
3. the gas supply system of ship according to claim 2, it is characterised in that also include measuring and adjusting being supplied to hair The caloric value adjustment portion of the combustion gas caloric value of motivation, the caloric value adjustment portion are supplied to the combustion gas of the engine including measurement The measurement of calorific value device of caloric value and adjust boil-off gas to the re-liquefied line supply quantity delivered flow regulator, The flow regulator can control its operation according to the combustion gas caloric value information that the measurement of calorific value device measures.
4. the gas supply system of ship according to claim 2, it is characterised in that also include measuring and adjusting being supplied to institute The caloric value adjustment portion of the caloric value of the combustion gas of engine is stated, the caloric value adjustment portion includes measurement and is supplied to the engine The measurement of calorific value device of combustion gas caloric value and entrance side one end are connected to the nitrogen separator front end on the re-liquefied line, go out The caloric value for the nitrogen separator rear end that mouth side one end is connected on the re-liquefied line adjusts line and regulation along the hair The flow control valve of the quantity delivered of the boil-off gas of heat regulation line conveying, the flow control valve can measure according to the heating The combustion gas caloric value information of measuring device measurement controls its operation.
5. the gas supply system of ship according to claim 2, it is characterised in that also include measuring and adjusting being supplied to hair The caloric value adjustment portion of the combustion gas caloric value of motivation, the caloric value adjustment portion include the combustion gas hair that measurement is supplied to the engine The measurement of calorific value device of heat and the nitrogen separator rear end circulation by re-liquefied line described in a part of 1st gas flow Caloric value regulation line and regulation along the caloric value regulation line conveying the 1st gas stream quantity delivered flow control valve, The flow control valve can control its operation according to the combustion gas caloric value information that the measurement of calorific value device measures.
6. a kind of gas supply system of ship, it is characterised in that including being made up of for accommodating liquid gas and boil-off gas Gas storage tank；The compression unit of boil-off gas comprising the holding vessel that pressurizes, and the boil-off gas of the compression unit will be passed through Body is supplied to the boil-off gas supply line of engine；The re-liquefied line of branch is formed from the boil-off gas supply line；The liquid again Change presser unit that line includes being pressurizeed the boil-off gas compressed by the compression unit, will to pass through the pressurization single The oil that contains is removed in the boil-off gas of member oil removing portion, by by the boil-off gas in the oil removing portion and the compression unit The boil-off gas of front end carries out the heat-exchange device of heat exchange, will subtracted by the boil-off gas of the heat-exchange device The expansion valve of pressure, the boil-off gas being depressurized by the expansion valve is separated into the gas of gas componant and liquid component Liquid/gas separator.
7. a kind of gas supply system of ship, it is characterised in that including being made up of for accommodating liquid gas and boil-off gas Gas storage tank；The compression unit of boil-off gas comprising the holding vessel that pressurizes, and the evaporation of the compression unit will be passed through Gas is supplied to the boil-off gas supply line of the 1st engine；From by being supplied to a part in the boil-off gas of the compression unit Carry out re-liquefied re-liquefied line；
Presser unit that the re-liquefied line includes being pressurizeed the boil-off gas by the compression unit, will by described plus Cooling end that the boil-off gas of pressure unit is cooled down, the cooled boil-off gas by the cooling end subtract for 1 time Pressure the 1st expansion valve and the boil-off gas by the gas-liquid mixture phase of the 1st expansion valve is separated into gas componant and liquid 1st gas-liquid separator of body composition, the evaporation that the 2nd engine will be supplied to from the gas componant of the 1st gas-liquid separator separates Gas circulation line, the 2nd the 2nd expansion valve depressurized will be carried out from the liquid component of the 1st gas-liquid separator separates and will be led to The boil-off gas for crossing the gas-liquid mixture phase of the 2nd expansion valve is separated into the 2nd gas-liquid separation of gas componant and liquid component Device.
8. the gas supply system of ship according to claim 7, it is characterised in that also include on the re-liquefied line The presser unit front end nitrogen separator, it is dense containing the 1st for the boil-off gas for being supplied to the re-liquefied line to be separated into Spend the 1st gas stream of nitrogen component and the 2nd gas stream containing the 2nd concentration nitrogen component.
9. the gas supply system of ship according to claim 7, it is characterised in that also described re-liquefied including that will be supplied to The oil removing portion that the oil contained in the boil-off gas of line is removed.
10. the gas supply system of ship according to claim 8, it is characterised in that also include measuring and adjusting being supplied to The caloric value adjustment portion of the combustion gas caloric value of 1st engine, the caloric value adjustment portion are supplied to the 1st hair including measurement The measurement of calorific value device of the combustion gas caloric value of motivation and the flow for adjusting the steam gas quantity delivered to the re-liquefied line supply Regulating valve, the flow control valve can control its operation according to the combustion gas caloric value that the measurement of calorific value device measures.
11. the gas supply system of ship according to claim 9, it is characterised in that the oil removing portion can be arranged on The gas supply system of the ship of the rear end of presser unit on the re-liquefied line.
12. the gas supply system of ship according to claim 7, it is characterised in that the re-liquefied line also includes will Before the gas componant from the 2nd gas-liquid separator separates is supplied to the compression unit of the holding vessel or the boil-off gas supply line The boil-off gas exhausting line at end, and the liquid gas for the holding vessel being supplied to from the liquid component of the 2nd gas-liquid separator separates Exhausting line.
13. the gas supply system of ship according to claim 1, it is characterised in that the presser unit can be set For the boil-off gas by the compression unit is pressurized into 50bar to 150bar.
14. the gas supply system of ship according to claim 2, it is characterised in that the nitrogen separator can include Membrane filter, cyclone separator (Cyclone), gas centrifuge (Gas centrifuge) and vortex tube (Vortex Tube it is at least one in).
15. the gas supply system of ship according to claim 2, it is characterised in that the nitrogen component ratio of the 1st concentration The nitrogen component of 2nd concentration contains the nitrogen component of higher concentration.
CN201680008497.9A 2015-02-03 2016-01-20 Gas supply system for ship Active CN107407231B (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
KR20150016595 2015-02-03
KR10-2015-0016595 2015-02-03
KR10-2015-0128238 2015-09-10
KR1020150128238A KR20160095597A (en) 2015-02-03 2015-09-10 Fuel gas supplying system in ships
KR10-2015-0128975 2015-09-11
KR1020150128975A KR101741741B1 (en) 2015-02-03 2015-09-11 Fuel gas supplying system in ships
KR10-2015-0133613 2015-09-22
KR1020150133613A KR101763697B1 (en) 2015-02-03 2015-09-22 Fuel gas supplying system in ships
PCT/KR2016/000576 WO2016126025A1 (en) 2015-02-03 2016-01-20 Fuel gas supply system for ship

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CN107407231B (en) 2020-04-24
KR20160095598A (en) 2016-08-11

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