KR101661938B1 - Fuel gas supplying system in ships - Google Patents

Fuel gas supplying system in ships Download PDF

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Publication number
KR101661938B1
KR101661938B1 KR1020150071952A KR20150071952A KR101661938B1 KR 101661938 B1 KR101661938 B1 KR 101661938B1 KR 1020150071952 A KR1020150071952 A KR 1020150071952A KR 20150071952 A KR20150071952 A KR 20150071952A KR 101661938 B1 KR101661938 B1 KR 101661938B1
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KR
South Korea
Prior art keywords
gas
line
calorific value
component
fuel gas
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Application number
KR1020150071952A
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Korean (ko)
Inventor
이원두
윤호병
최재웅
Original Assignee
삼성중공업 주식회사
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Priority to KR1020150071952A priority Critical patent/KR101661938B1/en
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Publication of KR101661938B1 publication Critical patent/KR101661938B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
    • F02D19/021—Control of components of the fuel supply system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—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
    • F02M21/0287—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F02M2025/0863—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 with means dealing with condensed fuel or water, e.g. having a liquid trap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off

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

Abstract

Disclosed is a fuel gas supplying system which can improve efficiency of reliquefaction, and can efficiently utilize and manage fuel gas. The system for supplying fuel gas in accordance with an embodiment of the present invention, comprises: a storage tank which receives liquefied gas and evaporation gas; an evaporation gas supplying line including a compression part that pressurizes the evaporation gas of the storage tank; a nitrogen separator which passes through the compression part to separate a nitrogen ingredient contained in the pressurized evaporation gas; a first fuel gas supplying line which supplies a first gas flow containing a nitrogen ingredient with a first concentration separated by the nitrogen separator to a first engine; and a reliquefaction line which receives a second gas flow containing a nitrogen ingredient with a second concentration separated by the nitrogen separator for reliquefaction. In regards to this, the reliquefaction line includes: a cooling part which cools the second gas flow; a first expansion valve which primarily decompresses the second gas flow passing through the cooling part; a first gas-liquid separator which passes through the first expansion valve to separate evaporation gas in a mixed state of gas and liquid into a gas ingredient and a liquid ingredient; and an evaporation gas circulation line which supplies the gas ingredient separated by the first gas-liquid separator to a second engine.

Description

[0001] FUEL GAS SUPPLYING SYSTEM IN SHIPS [0002]

The present invention relates to a fuel gas supply system, and more particularly, to a fuel gas supply system for a ship capable of efficiently using and managing fuel gas.

As IMO regulations on the emission of greenhouse gases and various air pollutants are strengthened, shipbuilding and marine industries are replacing the use of conventional oil and diesel oil with natural gas, which is a clean energy source, In many cases.

Natural gas is typically a liquefied natural gas (Liquefied Natural Gas), a colorless transparent cryogenic liquid with a volume reduced to 1/600 by cooling the natural gas to about -162 degrees Celsius for ease of storage and transportation. Management and operation.

Such liquefied natural gas is contained in a storage tank installed in an insulated manner on the hull and stored and transported. However, since it is virtually impossible to completely contain the liquefied natural gas, the external heat is continuously transferred to the inside of the storage tank, and the evaporated gas generated by naturally vaporizing the liquefied natural gas is accumulated in the storage tank . It is necessary to treat and remove the evaporated gas since the evaporated gas may increase the internal pressure of the storage tank and cause deformation and damage of the storage tank.

Conventionally, evaporation gas is flowed into a vent mast provided on the upper side of a storage tank, or a method of burning evaporation gas by using a GCU (Gas Combustion Unit) has been used. However, this is not desirable from the viewpoint of energy efficiency. Therefore, a method of re-liquefying the evaporation gas by supplying the evaporation gas with the liquefied natural gas or the fuel gas to the engine of the ship respectively, or using the re- .

Natural gas, on the other hand, is a mixture containing not only methane but also ethane, propane, butane, nitrogen and the like. The nitrogen boiling point is about -195.8 degrees Celsius, which is much lower than that of methane (boiling point -161.5 degrees) and ethane (boiling point-89 degrees Celsius).

Accordingly, the evaporation gas generated by naturally vaporizing in the storage tank contains a large amount of nitrogen component having a relatively low boiling point, which causes deterioration of the re-liquefaction efficiency of the evaporation gas, thereby affecting the utilization and treatment of the evaporation gas I am crazy.

In addition, when the evaporation gas is supplied to the engine of the ship as the fuel gas, the nitrogen component of the evaporation gas affects the decrease in the calorific value of the fuel gas, thereby improving the liquefaction efficiency of the evaporation gas and the calorific value of the fuel gas, It is necessary to plan for citation and management.

Korean Patent Publication No. 10-2010-0035223 (published on Apr. 05, 2010)

An embodiment of the present invention is to provide a fuel gas supply system capable of improving the re-liquefaction efficiency of evaporation gas.

An embodiment of the present invention seeks to provide a fuel gas supply system that can efficiently use and manage fuel gas.

An embodiment of the present invention is intended to provide a fuel gas supply system capable of effectively regulating and maintaining the calorific value of the fuel gas supplied to the engine.

The embodiment of the present invention is intended to provide a fuel gas supply system that can achieve efficient facility operation with a simple structure.

An embodiment of the present invention is to provide a fuel gas supply system capable of improving energy efficiency.

According to one aspect of the present invention, there is provided an evaporation apparatus comprising: a storage tank for storing a liquefied gas and an evaporation gas; an evaporation gas supply line having a compression section for pressurizing the evaporation gas of the storage tank; A first fuel gas feed line for feeding a first gas stream containing a nitrogen component of a first concentration separated by said nitrogen separator to a first engine and a second fuel gas feed line for supplying a second gas stream containing nitrogen components separated by said nitrogen separator to said second fuel gas feed line, Liquefaction line for supplying and re-liquefying a second gas flow containing a nitrogen component at a concentration of at least a portion of the second gas flow, wherein the re-liquefaction line comprises a cooling section for cooling the second gas flow, And a second gas-liquid separator for separating the gas-liquid mixture into a gas component and a liquid component, the first gas- , It may be provided, including the boil-off gas circulating line for supplying the gas component separated in the first gas-liquid separator to the second engine.

Wherein the liquid recycle line includes a liquefied gas circulation line supplied with the liquid component separated by the first gas-liquid separator, a second expansion valve for secondarily depressurizing the liquid component flowing along the liquefied gas circulation line, A second gas-liquid separator for separating the vaporized gas passing through the valve into a gas component and a liquid component, and a second gas-liquid separator for separating the gas component separated in the second gas-liquid separator from the upstream side of the compression section on the storage tank or the evaporation gas supply line And a liquefied gas recovery line for supplying the separated liquid components from the second gas-liquid separator to the storage tank.

The cooling unit may be provided with a heat exchanger for heat-exchanging the second gas flow with an evaporated gas before the compression unit and a gas component separated from the first gas-liquid separator.

Further comprising a second fuel gas supply line branched from a middle portion of the compression section and supplying an evaporation gas partially pressurized by the compression section to the second engine, wherein an outlet end of the evaporation gas circulation line is connected to the second And may be provided and provided to join with the fuel gas supply line.

The nitrogen separator may be provided including a membrane filter.

A first calorific value adjuster for measuring and adjusting the calorific value of the fuel gas supplied to the first engine, and a second calorific value adjuster for measuring and controlling the calorific value of the fuel gas supplied to the second engine .

The first heat emission control unit includes a first heating calorimeter measuring a calorific value of the fuel gas supplied to the first engine and a calorific value ascending line for directly supplying the pressurized evaporative gas to the first fuel gas supply line through the compression unit May be provided.

The first calorific value adjustment unit may further include a first calorific value adjustment line for circulating the first gas flow flowing along the first fuel gas supply line to the redistribution line.

The heating value increasing line and the first heating value adjusting line are respectively provided with a flow rate adjusting valve for adjusting the supply amount of the pressurized evaporating gas and the first gas flow flowing along the heating value increasing line and the first heating value adjusting line , And each of the flow rate control valves may be provided so that its operation is controlled based on the calorific value information of the fuel gas measured by the first calorimeter.

The first calorific value adjustment line may be provided with a pressure control valve for regulating the pressure of the first gas flow corresponding to the pressure difference between the first gas flow and the second gas flow by the membrane filter.

The second calorific value adjustment unit may include a second calorific value measuring device for measuring a calorific value of the fuel gas supplied to the second engine and a second calorific value measuring device for circulating the gas component of the first gas-liquid separator flowing along the evaporative gas circulation line to the liquefied gas circulation line And a second calorific value adjustment line.

Wherein the second fuel gas supply line is provided with a flow rate control valve for controlling the supply amount of the partially pressurized gas flowing along the second fuel gas supply line, The operation can be controlled so as to be controlled based on the calorific value information of the fuel gas.

The evaporation gas circulation line and the second calorific value adjustment line are respectively provided with flow rate control valves for regulating supply amounts of gas components of the first gas-liquid separator flowing through the evaporative gas circulation line and the second calorific value adjustment line, The flow rate control valve may be arranged to control the operation of the flow rate control valve based on the calorific value information of the fuel gas measured by the second calorific value measuring device.

The nitrogen component of the first concentration may be provided so as to contain a nitrogen component at a higher concentration than the nitrogen component of the second concentration.

A compression section for pressurizing the evaporation gas of the storage tank; an evaporation gas that has passed through the compression section and is pressurized to be separated into a first gas flow containing a first concentration of nitrogen component and a second gas flow containing a second concentration of nitrogen component A first expansion valve for first reducing the second gas flow that is cooled by passing through the cooling section, a second expansion valve for passing the first reduced pressure through the first expansion valve, A first gas-liquid separator for separating a gas flow into a gas component and a liquid component, a first fuel gas supply line for supplying a first gas flow separated from the first gas-liquid separator to a first engine, The liquefaction line may be provided with an evaporative gas circulation line for supplying a gas component of the first reduced-pressure second gas stream to the second engine.

The fuel gas supply system according to the embodiment of the present invention has the effect of improving the efficiency and performance of re-liquefaction of the evaporation gas.

The fuel gas supply system according to the embodiment of the present invention has the effect of efficiently utilizing and managing the fuel gas.

The fuel gas supply system according to the embodiment of the present invention has the effect of effectively controlling and maintaining the calorific value of the fuel gas.

The fuel gas supply system according to the embodiment of the present invention has an effect of improving the energy efficiency.

The fuel gas supply system according to the embodiment of the present invention has an effect of enabling efficient facility operation as a simple structure.

1 is a conceptual diagram showing a fuel gas supply system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

1 is a conceptual diagram showing a fuel gas supply system 100 according to an embodiment of the present invention.

1, a fuel gas supply system 100 according to an embodiment of the present invention includes a storage tank 110, an evaporation gas supply line 120 having a compression unit 121 for pressurizing the evaporation gas of the storage tank 110, A nitrogen separator 130 for separating a nitrogen component contained in the evaporated gas pressurized by the compression unit 121, a first gas containing a nitrogen component of a first concentration separated by the nitrogen separator 130, A refueling line 150 for re-liquefying a second gas stream separated by the nitrogen separator 130 and containing a nitrogen component of a second concentration, a first fuel gas supply line 140 for supplying a flow to the first engine, A second fuel gas supply line 160 branched from the stop of the compression unit 121 to supply an evaporated gas partially pressurized by the compression unit 121 to the second engine, And the amount of heat generated by the fuel gas supplied to the first engine and the second engine And a calorific value adjustment unit for measuring and adjusting the calorific value.

In the following examples, liquefied natural gas and evaporative gas generated therefrom are used as an example to help understand the present invention. However, the present invention is not limited thereto, and various liquefied gases such as liquefied ethane gas and liquefied hydrocarbon gas, The same technical idea should be understood in the same way.

The storage tank 110 is provided to receive or store the liquefied natural gas and the evaporative gas generated therefrom. The storage tank 110 may be provided with a membrane-type cargo hold that is heat-treated to minimize vaporization of liquefied natural gas due to external heat penetration. The storage tank 110 stores the liquefied natural gas and the evaporation gas in a stable manner until the liquefied natural gas is received from the production site of the natural gas, The power generation engine of the present invention can be used as a fuel gas.

Since the storage tank 110 is generally installed in a heat-treated state, it is practically difficult to shut off the intrusion of external heat completely. Therefore, there is an evaporative gas generated by naturally vaporizing the liquefied natural gas in the storage tank 110 do. Such evaporated gas raises the internal pressure of the storage tank 110, and there is a risk of deformation and explosion of the storage tank 110. Therefore, it is necessary to remove or treat the evaporated gas from the storage tank 110. [ The evaporated gas generated in the storage tank 110 may be used as the fuel gas of the engine by the first fuel gas supply line 140 or the second fuel gas supply line 160 as in the embodiment of the present invention, Liquefied by the liquefaction line 150 and re-supplied to the storage tank 110. In addition, although not shown in the drawing, the evaporation gas may be supplied or consumed by supplying a vent mast (not shown) provided at an upper portion of the storage tank 110.

The engine may be supplied with fuel gas such as liquefied natural gas and vaporized gas stored in the storage tank 110 to generate propulsive force of the ship or generate electric power for power generation such as internal equipment of the ship. The engine may include a first engine that generates an output by receiving a relatively high-pressure fuel gas, and a second engine that generates an output by receiving a relatively low-pressure fuel gas. For example, the first engine may be an ME-GI engine or an X-DF engine capable of generating an output with a relatively high-pressure fuel gas, and the second engine may include a DFDE An engine, or the like. However, the present invention is not limited thereto, and it should be equally understood that various numbers of engines and various kinds of engines are used.

The evaporation gas supply line 120 pressurizes the evaporation gas present in the storage tank 110 and supplies it as fuel gas to the second engine or to the first engine and refueling line 150 via the nitrogen separator 130 . The evaporation gas supply line 120 is provided with an inlet side end connected to the inside of the storage tank 110 and an outlet side end is connected to the first fuel gas supply line 140 through the nitrogen separator 130, Line 150 as shown in FIG. The evaporation gas supply line 120 is provided with a compression unit 121 having a plurality of stages of compressors 121a so that the evaporation gas can be processed according to the conditions required by the engine.

The compression unit 121 may include a compressor 121a for compressing the evaporated gas and a cooler 121b for cooling the heated evaporated gas while being compressed. In the case where the engine is composed of a plurality of engines having different pressure conditions, the second fuel gas supply line 160, which will be described later, is branched from the intermediate portion of the compression portion 121 to supply the partially pressurized evaporative gas to the second engine .

The pressure of the compressed gas that has been pressurized by the compressing unit 121 may pass through the nitrogen separator 130 as described later so that the pressure of the compressed gas may decrease. It is possible to pressurize and supply the evaporation gas to a pressure higher than the pressure condition by a predetermined magnitude.

1, the compression unit 121 is composed of five compressors 121a and a cooler 121b. However, the compression unit 121 may have various numbers of compressors A compressor 121a and a cooler 121b. Further, a heat exchanging unit 141 of a re-liquefaction line 150, which will be described later, may be installed on the upstream side of the compression unit 121 on the evaporation gas supply line 120, and a detailed description thereof will be described later.

The nitrogen separator 130 may be provided at the outlet side end of the evaporation gas supply line 120 so as to separate nitrogen components contained in the pressurized evaporated gas passing through the compression section 121. The nitrogen separator 130 classifies the pressurized evaporation gas into a first gas flow containing a first concentration of nitrogen component and a second gas flow containing a second concentration of nitrogen component, Gas supply line 140 to be used as the fuel gas to the first engine, and the second gas flow is provided to supply the re-liquefaction line 150, which will be described later.

The nitrogen component of the first concentration and the nitrogen component of the second concentration, which are described in this embodiment, refer to a nitrogen component of a high concentration and a nitrogen component of a low concentration, respectively. The nitrogen component of the first concentration is compared with the nitrogen component of the second concentration And the nitrogen component of the second concentration has a relatively low nitrogen component as compared with the nitrogen component of the first concentration. The first concentration and the second concentration are not limited to a specific value but should be understood as relative terms depending on the concentration difference between the first concentration and the second concentration.

Natural gas is a mixture containing ethane, propane, butane, nitrogen and the like in addition to the main component methane. Among them, the boiling point of nitrogen is about -195.8 degrees Celsius, which is much lower than that of methane (boiling point -161.5 degrees Celsius) and ethane (boiling point -89 degrees Celsius). Accordingly, the natural evaporation gas generated by spontaneously vaporizing in the storage tank 110 is relatively vaporized with a relatively low boiling point nitrogen component, thereby containing a large amount of nitrogen component. When the evaporation gas is to be re-liquefied, the re-liquefaction efficiency becomes lower as the concentration of the nitrogen component of the evaporation gas increases, because the nitrogen component has a low boiling point and is thus difficult to re-cure.

The nitrogen separator 130 separates the nitrogen component contained in the pressurized evaporated gas through the evaporation gas supply line 120 so that the first gas stream containing the nitrogen component of the first concentration passes through the fuel gas And the second gas flow containing the nitrogen component of the second concentration is supplied to the re-liquefaction line 150, thereby improving the liquefaction performance and efficiency of the re-liquefaction line 150. [

The nitrogen separator 130 may be a membrane filter. The membrane filter has a substance having high affinity with the nitrogen component and the pressurized evaporation gas passes through the membrane filter by the pressure so that the nitrogen component is filtered by the membrane filter and supplied to the first fuel gas supply line 140 And components other than nitrogen such as methane can be passed through and supplied to the refueling line 150.

The first fuel gas supply line 140 may be separated by the nitrogen separator 130 to use a first gas flow containing a high concentration of nitrogen component as the fuel gas in the first engine. As described above, the pressurized evaporation gas is separated into a first gas flow containing a nitrogen component of a first concentration and a second gas flow containing a nitrogen component of a second concentration through the nitrogen separator 130, The first fuel gas supply line 140 is supplied with the first gas flow having a low re-liquefaction efficiency and supplied to the first engine as the fuel gas, thereby making efficient use of the fuel gas, The re-liquefaction efficiency can be increased.

The liquefying line 150 is provided to separate and re-liquefy the second gas flow containing the nitrogen component of the second concentration by the nitrogen separator 130. As the nitrogen content in the evaporative gas to be liquefied increases, the re-liquefaction efficiency of the evaporation gas is lowered due to the low boiling point of the nitrogen component. Thus, the re-liquefaction line 150 is formed by the low concentration nitrogen component separated by the nitrogen separator 130 And the second gas flow containing the second gas flow is supplied to the second gas flow channel, thereby improving the re-liquefaction efficiency of the evaporation gas.

The redistribution line 150 includes a cooling section 151 for cooling the second gas flow, a first expansion valve 152 for primarily reducing the second gas flow passing through the cooling section 151, A first gas-liquid separator 153 for separating the vaporized gas in the vapor-liquid mixed state from the gas-liquid mixed gas passing through the first gas-liquid separator 152 into a gas component and a liquid component, A circulation line 154, a second expansion valve 156 for secondarily depressurizing the liquid component separated by the first gas-liquid separator 153, and a second expansion valve 156 to supply a vapor- Liquid separator 157 and the second gas-liquid separator 157 to the storage tank 110 or the first fuel gas supply line 120. The first gas-liquid separator 157 and the second gas- Liquid separator 157, the line 158 and the second gas-liquid separator 157 to the storage tank 110, It can may include a line 159.

The cooling unit 151 is provided to cool the second gas flow supplied to the refueling line 150. [ The cooling unit 151 circulates the second gas flow through the first fuel gas supply line 120 to the evaporation gas at the upstream side of the compression unit 121 and the first gas liquid transferred along the evaporation gas circulation line 154 And a heat exchanger for exchanging heat with gas components separated in the separator 153. Since the second gas flow is pressurized by the compression section 121 and the temperature and pressure are increased, the low-temperature evaporation gas before passing through the compression section 121 of the first fuel gas supply line 120, Temperature gas supplied to the liquid refining line 150 can be cooled by heat exchange with the low-temperature gas component conveyed along the liquid refining line 154. By providing the cooling section 151 as a heat exchanger in this way, the second gas flow can be cooled without any additional cooling device, so unnecessary waste of electric power can be prevented, facilities can be simplified, and facility operation efficiency can be improved.

The first expansion valve 152 may be provided at the rear end of the cooling unit 151. [ The first expansion valve 152 is capable of realizing re-liquefaction by cooling and expanding by primarily depressurizing the second gas flow that has passed through the cooling section 151. The first expansion valve 152 may be, for example, a Joule-Thomson valve. The first expansion valve 152 can reduce the pressure of the second gas flow passing through the cooling portion 151 to a pressure level corresponding to the fuel gas pressure condition required by the second engine. A detailed description thereof will be described later.

The first gas-liquid separator 153 is provided to separate the gas component and the liquid component from the vaporized gas in the vapor-liquid mixed state through the first expansion valve 152 and primarily cooled and decompressed. While the pressurized evaporated gas passes through the first expansion valve 152, it is cooled and decompressed to perform re-liquidization, but a flash gas may be generated during the decompression process. Accordingly, the first gas-liquid separator 153 receives the evaporated gas that has passed through the first expansion valve 152 and is in a gas-liquid mixed state, separates the gas and liquid components to thereby achieve reliability of the re-liquefaction process, The components can be handled separately.

On the other hand, after the evaporation gas pressurization by the compression section 121 and the evaporation gas pressurization by the cooling section 151 are performed for re-liquefaction of the evaporation gas, the pressure of the evaporation gas pressurized by the first expansion valve 152 A gas component such as a flash gas separated by the first gas-liquid separator 153 contains a nitrogen component having a low boiling point at a high concentration. When the gaseous component containing the nitrogen component at a high concentration is circulated again in the fuel gas system 100, not only the re-liquefaction efficiency of the evaporation gas is lowered, but also the compressor 121a of the compression section 121, There is a problem that a load is generated on the back of the compressor 121 or the installation of a high-compression compressor 121a is required, resulting in inefficiency of facility operation.

The evaporation gas circulation line 154 is provided to supply the gas component to the second engine as fuel gas, which is separated from the first gas-liquid separator 153 and contains a nitrogen component at a high concentration. As described above, a nitrogen component at a high concentration is contained relative to the gas component generated in the process of decompressing the evaporated gas cooled and pressurized through the first expansion valve 152. [ The evaporation gas circulation line 154 is supplied with a gas component having a low re-liquefaction efficiency and supplies the gas component to the second engine as a fuel gas. Thus, the first gas-liquid separator 153 can efficiently utilize the fuel gas, So that the re-liquefaction efficiency of the liquid component containing the relatively low concentration nitrogen component can be increased.

The first expansion valve 152 is provided to depressurize the second gas flow passing through the cooling section 151 to a level corresponding to the pressure condition required by the second engine, The gas component separated by the first gas-liquid separator 153 can be directly supplied to the second engine as the fuel gas.

The evaporation gas circulation line 154 is provided so as to pass through a cooling section 151 formed of a heat exchanger. The cooling of the second gas flow flowing along the redistribution line 150 is performed using the cold component of the gas component containing the high concentration nitrogen component flowing along the evaporation gas circulation line 154, Temperature heat of the second gas flow flowing along the evaporation gas circulation line 154 to the temperature of the gas component flowing along the evaporation gas circulation line 154 to a level corresponding to the temperature condition of the fuel gas required by the second engine.

The evaporation gas circulation line 154 is provided with a flow rate regulating valve 182 of the second calorific value regulator described later so that the supply amount of the fuel gas transferred along the evaporation gas circulation line 154 can be adjusted, Will be described later.

The liquid component containing the low concentration nitrogen component separated by the first gas-liquid separator 153 is conveyed along the liquefied gas circulation line 155 and is supplied to the second expansion valve 156 provided with the liquefied gas circulation line 155, Lt; RTI ID = 0.0 > re-liquefied < / RTI > As described above, the liquefaction efficiency of the evaporation gas is improved as the nitrogen component of low concentration is contained, so that the liquid component separated by the first gas-liquid separator 153 contains the nitrogen component of low concentration, so that the second expansion valve 156 ), The generation of gas components such as flash gas is reduced and the liquefaction efficiency can be improved. The second expansion valve 156 may be a Joule-Thomson valve, for example, and the second expansion valve 156 may be evacuated to a pressure level corresponding to the internal pressure of the storage tank 110. have.

The second gas-liquid separator 157 is provided to separate the gas component and the liquid component from the evaporation gas in the vapor-liquid mixed state through the second expansion valve 156 and then cooled and depressurized. The liquid component of the first gas-liquid separator 153, which is further depressurized by the second expansion valve 156, contains a low concentration of nitrogen component, so that most of the liquid component is re-liquidized. However, not only a small amount of nitrogen component exists, Is practically impossible. Accordingly, the evaporated gas that has passed through the second expansion valve 156 and becomes the gas-liquid mixed state is separated into the gas component and the liquid component by the second gas-liquid separator 157 to improve the reliability of the re-liquefaction process, can do.

The evaporated gas recovery line 158 is connected to the second gas-liquid separator 157 and the second gas-liquid separator 157 so as to be supplied again to the storage tank 110 or the first fuel gas supply line 120 by the gas- And may be provided between the tank 110 or the second gas-liquid separator 157 and the first fuel gas supply line 120. 1, the vaporized gas recovery line 158 is shown as supplying the gas component of the second gas-liquid separator 157 to the upstream side of the compression section 121 on the first fuel gas supply line 120. However, 2 gas-liquid separator 157 to the storage tank 110, or re-supplied to the first fuel gas supply line 120 and the storage tank 110 together.

The liquefied gas recovery line 159 may be provided between the second gas-liquid separator 157 and the storage tank 110 so as to re-supply the liquid component separated by the second gas-liquid separator 157 to the storage tank 110 . The liquefied gas recovery line 159 may be provided so that its inlet-side end communicates with the lower side of the second gas-liquid separator 157 and its outlet-side end communicates with the interior of the storage tank 110. The liquefied gas recovery line 159 may be provided with an on-off valve (not shown) for regulating the supply amount of the re-liquefied liquefied natural gas recovered to the storage tank 110.

The second fuel gas supply line 160 is branched from the intermediate portion of the compression unit 121 of the evaporation gas supply line 120 and is provided to supply a partially pressurized evaporative gas to the second engine. The second fuel gas supply line 160 has an inlet end connected to the intermediate portion of the compression section 121 and an outlet end joined to the evaporation gas circulation line 154 to be connected to the second engine .

Since the second engine generates the output by receiving the relatively low-pressure fuel gas, the second engine is branched from the intermediate portion of the compression unit 121 that compresses the evaporated gas, And can be supplied with the fuel gas along with the gas component containing the nitrogen component at a high concentration conveyed along the evaporation gas circulation line 154 described above. Although not shown in FIG. 1, when the supply amount of the fuel gas supplied through the second fuel gas supply line 160 and the evaporation gas circulation line 154 is larger than the supply amount of the fuel gas required by the second engine, And the outlet side end of the second fuel gas supply line 160 may be branched and connected to the GCU together.

The first calorific value adjuster is provided to measure and adjust the calorific value of the fuel gas supplied to the first engine.

The heating value means the amount of heat released when the fuel gas of a unit mass is completely burned. Methane, butane, and propane in natural gas have a relatively high calorific value, which increases the calorific value of the fuel gas (the calorific value of methane is about 12,000 kcal / kg, the calorific value of butane is about 11,863 kcal / kg and the calorific value of propane is about 2,000 kcal / kg), whereas the calorific value of nitrogen is very low (calorific value of nitrogen: about 60 kcal / kg). The higher the absolute content or concentration of nitrogen component, the lower the total calorific value of the fuel gas. If the total calorific value of the fuel gas supplied to the engine is too low to meet the minimum calorific value required by the engine, it affects the output of the engine and causes an unnecessary load on the engine.

As described above, the second gas flow containing the nitrogen component of the second concentration in the pressurized vaporized gas to which the nitrogen separator 130 is pressurized for increasing the liquefaction efficiency of the liquefaction line 150 is introduced into the liquefaction line 150 And the first gas flow is supplied to the first fuel gas supply line 140 so that the amount of heat generated by the first gas flow due to the nitrogen component at a high concentration contained in the first gas flow is reduced by the amount of heat There is a possibility that it is lowered.

The first calorific value adjustment unit 170 includes a first calorific value measurement unit 170 for measuring or calculating the calorific value of the fuel gas supplied to the first engine, a second calorific value measurement unit 170 for calculating the calorific value of the fuel gas supplied to the first fuel gas supply line 140 A first calorific value adjustment line 173 for circulating the first gas flow supplied along the directly supplied calorific value increase line 171 and the first fuel gas supply line 140 to the refill line 150 .

The first calorific value measurer 170 can measure the calorific value of the fuel gas including the first gas flow supplied to the first engine to the first fuel gas supply line 150 in real time. The first calorific value measuring device 170 transmits the calorific value information of the fuel gas measured by the display unit (not shown) such as a display to notify the occupant of the ship or the calorific value information of the measured fuel gas to a control unit The control unit compares the conditional calorific value of the first engine and the calorific value information of the fuel gas transmitted from the first calorific value measuring device 170 and outputs the calorific value increase line 171 and the first calorific value adjustment line 173 The degree of opening and closing of the flow rate control valves 172 and 174, respectively,

1, the first heating calorimeter 170 is provided on the first fuel gas supply line 140 to measure the calorific value of the fuel gas. However, if the calorific value of the fuel gas supplied to the first engine can be measured The position can be varied in various ways.

The heating amount raising line 171 may be provided such that the inlet side end portion is connected to the downstream end of the compression portion 121 on the evaporation gas supply line 120 and the outlet side end portion is connected to the first fuel gas supply line 140. The heating amount increase line 171 allows the evaporated gas passed through the compression section 121 to merge into the first gas flow flowing through the first fuel gas supply line 140 without passing through the nitrogen separator 130. Thereby, the concentration of the nitrogen component of the fuel gas composed of the first gas flow supplied to the first engine and the pressurized evaporation gas is lowered, and the concentration of the component having a high calorific value such as methane and butane is increased to increase the total calorific value of the fuel gas .

The heating amount increase line 171 may be provided with a flow rate control valve 172 for controlling the supply amount of the pressurized evaporation gas flowing along the heating amount increase line 171. The flow control valve 172 is automatically controlled by the operator or controlled by the operator on the basis of the calorific value information of the fuel gas measured by the first calorific value measuring instrument 170 and the condition calorific value information of the first engine The supply amount of the pressurized evaporation gas flowing along the heat generation amount rise line 171 can be controlled.

The first heating calorific value adjustment line 173 is connected to the first fuel gas supply line 140 at the inlet side end and to the front end of the point where the heating value raising line 171 joins, (Not shown). As described above, the first gas flow contains a nitrogen component at a high concentration, and thus the calorific value is lower than that of the pressurized evaporated gas. Accordingly, a part of the first gas flow flowing along the first fuel gas supply line 140 can be circulated to the refueling line 150 side to increase and adjust the total calorific value of the fuel gas supplied to the first engine. At the same time, the first calorific value adjustment line 173 recovers a part of the first gas flow to the refueling line 150, thereby controlling the pressurization through the heating value increase line 171 corresponding to the required supply amount of the fuel gas of the first engine It is possible to prevent the excessive increase of the total supply amount of the fuel gas due to the merging of the evaporated gases and to efficiently regulate the supply amount of the fuel gas.

The first calorific value adjustment line 173 may be provided with a flow rate regulating valve 174 for regulating the supply amount of a part of the first gas flow flowing along the first calorific value adjustment line 173. The flow control valve 174 is automatically controlled by the operator or controlled by the operator on the basis of the calorific value information of the fuel gas measured by the first calorific value measurer 170 and the calorific value information of the first engine The amount of the first gas flow that flows along the first calorific value adjustment line 173 can be controlled. Alternatively, although not shown in the drawings, the first heating value adjustment line 173 (not shown) may be provided on the basis of the fuel gas supply amount information measured by the first fuel gas supply line 140 or the flow rate sensing unit The degree of opening and closing of the flow rate control valve 174 provided in the flow control valve 174 may be controlled.

The second calorific value adjuster is provided to measure and adjust the calorific value of the fuel gas supplied to the second engine.

As described above, in order to increase the re-liquefaction efficiency of the re-liquefaction line 150, the liquid component containing the relatively low concentration nitrogen component separated by the first gas-liquid separator 153 is supplied to the second expansion valve 156 side , A gas component containing a relatively high concentration of nitrogen component is supplied to the second engine through the evaporation gas circulation line 154 and is supplied to the second engine by the high concentration nitrogen component flowing along the evaporation gas circulation line 154 There is a possibility that the calorific value of the supplied fuel gas becomes lower than the calorific value required by the second engine.

The second calorific value adjustment unit includes a second calorific value measuring unit 180 for measuring or calculating the calorific value of the fuel gas supplied to the second engine, a gas component supplied along the evaporative gas circulation line 154 to the liquefied gas circulation line 155 The flow control valves 181, 182 and 184 installed in the second heating calorific value adjustment line 183 and the second fuel gas supply line 160, the evaporation gas circulation line 154 and the calorific value adjustment line 183, .

The second calorific value measuring device 180 is connected to the first gas-liquid separator 180, which is supplied to the second engine through the second pressurized evaporative gas and the evaporative gas circulation line 154 supplied to the second engine through the second fuel gas supply line 140, The calorific value of the fuel gas containing the gas component of the fuel gas 153 can be measured in real time. The second calorific value measurer 180 transmits the calorific value information of the fuel gas measured by a display unit (not shown) such as a display to notify the occupant of the vessel or the calorific value information of the measured fuel gas to a control unit The control unit can control the degree of opening and closing of the flow rate control valve, which will be described later, by comparing and analyzing the conditionally calorific value of the input second engine and the calorific value information of the fuel gas transmitted from the second calorific value measuring device 180.

1, the second calorific value measuring device 180 is provided at the rear end of the point where the evaporative gas circulation line 154 on the second fuel gas supply line 160 joins to measure the calorific value of the fuel gas, If the calorific value of the fuel gas supplied to the engine can be measured, the position can be variously modified.

The second calorific value adjustment line 183 is provided such that the inlet side end is connected to the evaporation gas circulation line 154 and the outlet side end is connected to the front end of the second expansion valve 156 on the liquefied gas circulation line 155 . As described above, the gas component flowing along the evaporation gas circulation line 154 contains a nitrogen component at a high concentration, so that the calorific value is lower than that of some pressurized evaporation gas flowing along the second fuel gas supply line 160. Therefore, a part of the gas component flowing along the evaporation gas circulation line 154 can be recovered to the liquefied gas circulation line 155 side, and the total calorific value of the fuel gas supplied to the second engine can be raised and adjusted. At the same time, the second calorific value adjustment line 183 recovers a part of the gas component flowing through the evaporative gas circulation line 154 to the liquefied gas circulation line 155, The supply amount of the gas can be efficiently controlled.

The flow rate control valves 181, 182 and 184 may be respectively installed in the second fuel gas supply line 160, the evaporation gas circulation line 154 and the second heating value regulating line 183. Each of the flow control valves 181, 182 and 184 is manually or manually controlled by the operator on the basis of the calorific value information of the fuel gas measured by the second calorific value measurer 180 and the calorific value information of the second engine. The amount of heating of the fuel gas can be controlled.

For example, when the calorific value of the fuel gas measured by the second calorimeter 180 is smaller than the calorific value of the second engine, the flow regulating valve 181 provided in the second fuel gas supply line 160 is opened, The flow regulating valve 182 provided in the gas circulation line 154 may be closed or partially closed to increase the calorific value of the fuel gas. The flow regulating valve 184 on the second calorific value adjustment line 183 is opened to supply a gas component containing a relatively high concentration of nitrogen component flowing along the evaporative gas circulation line 154 to the liquefied gas circulation line 155, . When the calorific value of the fuel gas measured by the second calorimeter 180 is larger than the calorific value of the second engine, the nitrogen gas component of the evaporative gas in the fuel gas supply system 100 is preferentially consumed, The flow regulating valve 182 provided in the line 154 is opened while the second calorific value adjusting line 183 is closed and the flow regulating valve 184 provided in the second fuel gas supplying line 160 is closed 181 may be fully closed or partially closed.

The fuel gas supply system 100 according to an embodiment of the present invention having such a configuration uses a first gas flow containing a nitrogen component of a first concentration through a nitrogen separator 130 as a fuel gas in a first engine At the same time, by using the gas component containing a high concentration of nitrogen component generated in the process of reducing the second gas flow for the liquefaction process of the evaporation gas as the fuel gas to the second engine by using the evaporation gas circulation line 154 The efficient consumption of the nitrogen component in the fuel gas supply system 100 and the continuous reduction of the total nitrogen content in the fuel gas system 100 improve the refueling efficiency of the evaporation gas and the refueling performance of the refueling line 150 .

Also, by measuring and adjusting the calorific value of the fuel gas by the first calorific value adjuster and the second calorific value adjuster, the heating value of the fuel gas is adjusted in accordance with the calorific value required by each engine to efficiently utilize and manage the fuel gas .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of the invention should be determined only by the appended claims.

100: fuel gas supply system 110: storage tank
120: evaporation gas supply line 121: compression section
130: nitrogen separator 140: first fuel gas supply line
150: Re-liquefaction line 151: Cooling unit
152: first expansion valve 153: first gas-liquid separator
154: Evaporative gas circulation line 155: Liquefied gas circulation line
156: second expansion valve 157: second gas-liquid separator
158: Evaporative gas recovery line 159: Liquefied gas recovery line
160: second fuel gas supply line 170: first heating calorimeter
171: heat generation amount increase line 173: first heat generation amount adjustment line
180: second calorific value measuring device 183: second calorific value adjusting line

Claims (15)

A storage tank for storing the liquefied gas and the evaporated gas;
An evaporation gas supply line having a compression section for pressurizing the evaporation gas of the storage tank;
A nitrogen separator for separating the nitrogen component contained in the pressurized evaporated gas passing through the compression section;
A first fuel gas supply line for supplying a first gas flow containing a nitrogen component of a first concentration separated by the nitrogen separator to a first engine;
A re-liquefaction line for receiving and re-liquefying a second gas flow containing a nitrogen component of a second concentration separated by said nitrogen separator; And
And a first calorific value adjustment unit for measuring and adjusting the calorific value of the fuel gas supplied to the first engine,
The re-liquefaction line
A first expansion valve that primarily reduces the second gas flow that has passed through the cooling section, and a second expansion valve that passes the vaporized gas in a gas-liquid mixed state through the first expansion valve to a liquid Liquid separator for separating the liquid component into a gas component containing a nitrogen component at a higher concentration than the liquid component, a liquefied gas circulation line for receiving the liquid component separated from the first gas-liquid separator, A second gas-liquid separator for separating the vaporized gas passing through the second expansion valve into a gas component and a liquid component; and a second gas-liquid separator for separating the gas- An evaporation gas circulation line for supplying a separated gas component containing the nitrogen component at a high concentration to the second engine so as to be consumed as a fuel gas; The ridoen the gas component comprises a storage tank or the boil-off gas recovery line for supplying to the boil-off gas feed line,
The first calorific value adjustment unit
A first calorific value measuring device for measuring a calorific value of the fuel gas supplied to the first engine and a calorific value ascending line for directly supplying the pressurized evaporated gas passed through the compressed portion to the first fuel gas supply line, . The method according to claim 1,
The re-liquefaction line
And a liquefied gas recovery line for supplying the liquid component separated in the second gas-liquid separator to the storage tank. 3. The method of claim 2,
The cooling unit
And a heat exchanger for heat-exchanging the second gas flow with an evaporation gas at a front end of the compression section and a gas component separated at the first gas-liquid separator. The method of claim 3,
Further comprising a second fuel gas supply line branched from a middle portion of the compression section and supplying an evaporated gas partially pressurized by the compression section to the second engine,
And an outlet side end of the evaporation gas circulation line is arranged to join with the second fuel gas supply line. 5. The method of claim 4,
The nitrogen separator
A fuel gas supply system comprising a membrane filter. 6. The method of claim 5,
And a second calorific value adjuster for measuring and regulating the calorific value of the fuel gas supplied to the second engine. delete The method according to claim 6,
The first calorific value adjustment unit
And a first calorific value adjustment line for circulating the first gas flow flowing along the first fuel gas supply line to the refill liquefaction line. 9. The method of claim 8,
The heating value raising line and the first heating calorie adjusting line
And a flow control valve for controlling the supply amount of the pressurized evaporation gas and the first gas flow flowing along the heating value increasing line and the first heating value adjusting line,
Wherein the operation of each of the flow rate control valves is controlled based on the calorific value information of the fuel gas measured by the first calorimeter. 9. The method of claim 8,
The first calorific value adjustment line
And a pressure regulating valve is provided for regulating the pressure of the first gas flow corresponding to a pressure difference between the first gas flow and the second gas flow by the membrane filter. The method according to claim 6,
The second calorific value adjustment unit
A second calorific value measuring device for measuring a calorific value of the fuel gas supplied to the second engine,
And a second calorific value adjustment line for circulating the gas component of the first gas-liquid separator flowing along the evaporative gas circulation line to the liquefied gas circulation line. 12. The method of claim 11,
The second fuel gas supply line
A flow control valve for regulating a supply amount of the partially pressurized gas flowing along the second fuel gas supply line is provided,
Wherein the operation of the flow rate control valve is controlled on the basis of the calorific value information of the fuel gas measured by the second calorimeter. 13. The method of claim 12,
The evaporative gas circulation line and the second calorific value adjustment line
A flow control valve for controlling the supply amount of the gas component of the first gas-liquid separator flowing through the evaporative gas circulation line and the second calorific value adjustment line,
Wherein the operation of each of the flow rate control valves is controlled based on the calorific value information of the fuel gas measured by the second calorimeter. The method according to claim 1,
The nitrogen component of the first concentration
And a nitrogen component at a higher concentration than the nitrogen component at the second concentration. A compression unit for pressurizing the evaporation gas of the storage tank;
A nitrogen separator for separating the pressurized evaporated gas passing through the compression section into a first gas flow containing a first concentration of nitrogen component and a second gas flow containing a second concentration of nitrogen component;
A cooling unit for cooling the second gas flow;
A first expansion valve that primarily reduces the second gas flow that has passed through the cooling section and is cooled;
A first gas-liquid separator for separating a second gas flow that is firstly reduced in pressure through the first expansion valve into a gas component containing a liquid component and a nitrogen component at a higher concentration than the liquid component;
A first fuel gas supply line for supplying a first gas flow separated in the first gas-liquid separator to a first engine;
A re-liquefaction line for re-liquefying the second gas flow; And
And a first calorific value adjustment unit for measuring and adjusting the calorific value of the fuel gas supplied to the first engine,
The re-liquefaction line
A second expansion valve for secondarily reducing the pressure of the liquid component flowing along the liquefied gas circulation line, a second expansion valve for passing the liquid component separated through the second expansion valve, A second gas-liquid separator for secondarily separating the vaporized gas in a mixed state from a gas component and a liquid component; a second gas-liquid separator for separating the gas component containing the high- A gas circulation line and an evaporation gas recovery line for supplying a gas component separated from the second gas-liquid separator to the storage tank or an evaporation gas supply line,
The first calorific value adjustment unit
A first calorific value measuring device for measuring a calorific value of the fuel gas supplied to the first engine and a calorific value ascending line for directly supplying the pressurized evaporated gas passed through the compressed portion to the first fuel gas supply line, .


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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101864151B1 (en) * 2017-06-02 2018-06-05 삼성중공업 주식회사 Fuel gas supply system
KR20200050481A (en) * 2018-10-31 2020-05-12 삼성중공업 주식회사 Fuel gas treating system in ships

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080057421A (en) * 2006-12-20 2008-06-25 삼성중공업 주식회사 Gas fuel supply device for controlling methane number in lngc
KR20100035223A (en) 2008-09-26 2010-04-05 현대중공업 주식회사 Fuel gas supply system for lng carrier using duel fuel diesel electric propulsion engine
KR101459962B1 (en) * 2013-10-31 2014-11-07 현대중공업 주식회사 A Treatment System of Liquefied Gas
KR20150001601A (en) * 2013-06-26 2015-01-06 대우조선해양 주식회사 Method for building a ship
KR101485685B1 (en) * 2013-07-23 2015-01-22 현대중공업 주식회사 A Treatment System of Liquefied Gas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080057421A (en) * 2006-12-20 2008-06-25 삼성중공업 주식회사 Gas fuel supply device for controlling methane number in lngc
KR20100035223A (en) 2008-09-26 2010-04-05 현대중공업 주식회사 Fuel gas supply system for lng carrier using duel fuel diesel electric propulsion engine
KR20150001601A (en) * 2013-06-26 2015-01-06 대우조선해양 주식회사 Method for building a ship
KR101485685B1 (en) * 2013-07-23 2015-01-22 현대중공업 주식회사 A Treatment System of Liquefied Gas
KR101459962B1 (en) * 2013-10-31 2014-11-07 현대중공업 주식회사 A Treatment System of Liquefied Gas

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101864151B1 (en) * 2017-06-02 2018-06-05 삼성중공업 주식회사 Fuel gas supply system
KR20200050481A (en) * 2018-10-31 2020-05-12 삼성중공업 주식회사 Fuel gas treating system in ships
KR102379500B1 (en) 2018-10-31 2022-03-31 삼성중공업 주식회사 Fuel gas treating system in ships

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