KR101711951B1 - Fuel gas supply system - Google Patents

Fuel gas supply system Download PDF

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KR101711951B1
KR101711951B1 KR1020150090966A KR20150090966A KR101711951B1 KR 101711951 B1 KR101711951 B1 KR 101711951B1 KR 1020150090966 A KR1020150090966 A KR 1020150090966A KR 20150090966 A KR20150090966 A KR 20150090966A KR 101711951 B1 KR101711951 B1 KR 101711951B1
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South Korea
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gas
line
pressure
liquid separator
heat
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KR1020150090966A
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Korean (ko)
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KR20170001250A (en
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한준희
강호숙
박수율
이원두
이종철
이효은
황예림
윤호병
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삼성중공업 주식회사
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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
    • 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
    • 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
    • F02M21/0203—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
    • F02M21/0287—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
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • 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
    • F17C2265/032—Treating the boil-off by recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • 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
    • 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

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

Abstract

연료가스 공급시스템을 개시한다. 본 발명의 실시 예에 따른 연료가스 공급시스템은 액화가스의 증발가스를 압축하는 1차 압축부와 1차 압축부를 통과한 증발가스를 압축하는 2차 압축부를 포함하는 다단 압축부; 다단 압축부를 통과한 증발가스를 액화시키는 제1열교환부; 제1열교환부를 통과한 증발가스를 기체 및 액체 성분으로 1차 분리시키는 제1기액분리기; 다단 압축부 및 엔진을 연결하는 연료공급라인; 연료공급라인의 2차 압축부 후단에서 분기되어, 제1열교환부, 및 제1기액분리기를 연결하는 제1재액화라인; 제1기액분리기에서 분리된 액체 성분을 기체 및 액체 성분으로 2차 분리시키는 제2기액분리기; 연료공급라인의 1차 압축부 후단에서 분기되어, 1차 압축부를 통과한 증발가스를 제1열교환부를 거쳐 제2기액분리기로 공급하는 제2재액화라인; 및 제2재액화라인의 제1열교환부 후단에 마련되고, 제1기액분리기에서 분리된 기체 성분과 제1열교환부를 통과한 증발가스 간 열교환을 수행하는 제2열교환부;를 포함한다.A fuel gas supply system is disclosed. A fuel gas supply system according to an embodiment of the present invention includes a multi-stage compression unit including a primary compression unit for compressing the evaporated gas of the liquefied gas and a secondary compression unit for compressing the evaporated gas passing through the primary compression unit; A first heat exchanger for liquefying the evaporated gas that has passed through the multi-stage compression unit; A first gas-liquid separator for primarily separating the vaporized gas that has passed through the first heat exchange unit into gas and liquid components; A fuel supply line connecting the multi-stage compression unit and the engine; A first redistribution line branching from a downstream end of the secondary compression section of the fuel supply line and connecting the first heat exchange section and the first gas-liquid separator; A second gas-liquid separator for secondarily separating the liquid component separated in the first gas-liquid separator into gas and liquid components; A second redistribution line branching from a downstream end of the primary compression section of the fuel supply line and supplying the evaporated gas that has passed through the primary compression section to the second gas-liquid separator through the first heat exchange section; And a second heat exchanger provided at a stage subsequent to the first heat exchanger of the second redistribution line for performing heat exchange between the gas component separated in the first gas-liquid separator and the evaporated gas passing through the first heat exchanger.

Description

연료가스 공급시스템{FUEL GAS SUPPLY SYSTEM}FUEL GAS SUPPLY SYSTEM [0002]

본 발명은 연료가스 공급시스템에 관한 것이다.The present invention relates to a fuel gas supply system.

온실가스 및 각종 대기오염 물질의 배출에 대한 국제해사기구(IMO)의 규제가 강화됨에 따라 조선 및 해운업계에서는 기존 연료인 중유, 디젤유의 이용을 대신하여, 청정 에너지원인 천연가스를 선박의 연료가스로 이용하는 경우가 많아지고 있다.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.

연료가스 중에서 널리 이용되고 있는 천연가스(Natural Gas)는 메탄(Methane)을 주성분으로 하며, 통상적으로 그 부피를 1/600로 줄인 액화가스(Liquefied Gas) 상태로 변화되어 저장 및 운반되고 있다.Natural gas, which is widely used in fuel gas, is mainly stored as methane and is stored and transported in a liquefied gas state where the volume thereof is reduced to 1/600.

액화가스를 운반하는 선박은 액화가스를 저장할 수 있도록 단열 처리된 저장탱크를 구비한다. 또, 이러한 선박은 저장탱크에서 자연적으로 발생하는 증발가스(Boiled Off Gas) 또는 저장탱크의 액화가스를 기화시켜 엔진의 연료로 공급하는 연료가스 공급시스템을 마련할 수 있다. 선박의 엔진에는 DFDE(Dual Fuel Disel Electric) 엔진 등과 같은 저압(약 5~8bar)의 분사엔진, ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압(약 150~700bar)의 분사엔진 및 중압(약 16~18bar)의 연료가스로 연소가 가능한 중압가스 분사엔진이 이용될 수 있다.The ship carrying the liquefied gas has a storage tank which is insulated to store the liquefied gas. In addition, such a vessel can provide a fuel gas supply system that vaporizes naturally occurring boiling off gas in the storage tank or liquefied gas in the storage tank and supplies it to the fuel of the engine. The engine of the ship is equipped with a low-pressure (about 5-8 bar) injection engine such as a DFDE (Dual Fuel Disel Electric) engine, a high-pressure (about 150-700 bar) injection engine such as the ME-GI engine (Man B & W's Gas Injection engine) A medium pressure gas injection engine capable of combusting with medium pressure (about 16-18 bar) fuel gas may be used.

한편, 상술한 연료가스 공급시스템은 예컨대 ME-GI 엔진이 필요로 하는 연료 소모량보다 많은 증발가스가 공급된 경우, 해당 잉여분의 증발가스를 저장탱크로부터 공급된 증발가스와 열교환시키는 방법으로 재액화시켜 저장탱크에 저장할 수 있다. On the other hand, the above-mentioned fuel gas supply system resolidifies the surplus evaporated gas by heat exchange with the evaporated gas supplied from the storage tank, for example, when the evaporated gas is supplied in excess of the fuel consumption amount required by the ME-GI engine Can be stored in a storage tank.

그러나, 잉여분의 증발가스(압축된 증발가스)와 저장탱크로부터 공급된 증발가스 간 열교환을 수행하는 열교환부 내에는 액화 잠열이 발생하고, 이와 상응하는 열용량 변화에 의해 핀치 포인트(Pinch Point)가 형성될 수 있다. 이로 인해 저장탱크로부터 공급된 증발가스의 냉열을 효과적으로 잉여분의 증발가스로 전달하지 못하여 액화 효율이 낮아질 수 있다. 이와 관련된 기술로서 한국공개특허 제10-2014-0052898호(2014.05.07. 공개)를 참조하기 바란다.However, latent heat of liquefaction is generated in the heat exchanging unit for performing the heat exchange between the surplus evaporation gas (compressed evaporation gas) and the evaporation gas supplied from the storage tank, and a pinch point is formed . As a result, the liquefaction efficiency can be lowered because the cold heat of the evaporated gas supplied from the storage tank can not be efficiently transferred to the excess evaporated gas. As a related art, refer to Korean Patent Laid-Open No. 10-2014-0052898 (published on May 31, 2014).

한국공개특허 제10-2014-0052898호(2014.05.07. 공개)Korean Patent Laid-Open No. 10-2014-0052898 (published on May 4, 2014)

본 발명의 실시 예는 액화 효율을 향상시킬 수 있는 연료가스 공급시스템을 제공하고자 한다.An embodiment of the present invention is to provide a fuel gas supply system capable of improving liquefaction efficiency.

본 발명의 일 측면에 따르면, 액화가스의 증발가스를 압축하는 1차 압축부와 상기 1차 압축부를 통과한 증발가스를 압축하는 2차 압축부를 포함하는 다단 압축부; 상기 다단 압축부를 통과한 증발가스를 액화시키는 제1열교환부; 상기 제1열교환부를 통과한 증발가스를 기체 및 액체 성분으로 1차 분리시키는 제1기액분리기; 상기 다단 압축부 및 엔진을 연결하는 연료공급라인; 상기 연료공급라인의 2차 압축부 후단에서 분기되어, 상기 제1열교환부, 및 상기 제1기액분리기를 연결하는 제1재액화라인; 상기 제1기액분리기에서 분리된 액체 성분을 기체 및 액체 성분으로 2차 분리시키는 제2기액분리기; 상기 연료공급라인의 1차 압축부 후단에서 분기되어, 상기 1차 압축부를 통과한 증발가스를 상기 제1열교환부를 거쳐 상기 제2기액분리기로 공급하는 제2재액화라인; 및 상기 제2재액화라인의 제1열교환부 후단에 마련되고, 상기 제1기액분리기에서 분리된 기체 성분과 상기 제1열교환부를 통과한 증발가스 간 열교환을 수행하는 제2열교환부;를 포함하는 연료가스 공급시스템이 제공될 수 있다.According to an aspect of the present invention, there is provided a multi-stage compression apparatus comprising: a multi-stage compression section including a primary compression section for compressing an evaporative gas of liquefied gas and a secondary compression section for compressing an evaporative gas passing through the primary compression section; A first heat exchanger for liquefying the evaporated gas that has passed through the multi-stage compression unit; A first gas-liquid separator for primarily separating the vaporized gas passing through the first heat exchange unit into a gas and a liquid component; A fuel supply line connecting the multi-stage compression unit and the engine; A first redistribution line branching from a downstream end of the secondary compression section of the fuel supply line and connecting the first heat exchange section and the first gas-liquid separator; A second gas-liquid separator for secondarily separating the liquid component separated in the first gas-liquid separator into gas and liquid components; A second redistribution line branching from a downstream end of the primary compression section of the fuel supply line and supplying the evaporated gas that has passed through the primary compression section to the second gas-liquid separator through the first heat exchange section; And a second heat exchanger provided at a stage subsequent to the first heat exchanger of the second redistribution line for performing heat exchange between the gas component separated by the first gas-liquid separator and the evaporated gas passing through the first heat exchanger, A fuel gas supply system may be provided.

상기 제1기액분리기에서 분리된 기체 성분을 상기 제2열교환부를 거쳐 상기 연료공급라인의 다단 압축부 전단으로 합류시키는 합류라인과,A joining line for joining the gas components separated in the first gas-liquid separator to the front end of the multi-stage compression section of the fuel supply line via the second heat exchanging section,

상기 합류라인의 제2열교환부 후단에 마련되며, 상기 열교환이 수행된 기체 성분을 감압시키는 제1감압밸브와, 상기 제2기액분리기에 의해 분리된 기체 성분을 상기 합류라인의 제1감압밸브 후단에 합류시키는 재순환라인을 더 포함할 수 있다.A first pressure reducing valve provided at a downstream end of the second heat exchanging portion of the merging line for reducing the pressure of the heat exchanged gas component and a second reducing valve disposed downstream of the first reducing valve of the merging line As shown in FIG.

상기 제1기액분리기에 의해 분리된 액체 성분을 감압시키는 제2감압밸브와, 상기 제1기액분리기, 상기 제2감압밸브 및 상기 제2기액분리기를 연결하는 연결라인을 더 포함할 수 있다.A second pressure reducing valve for reducing the pressure of the liquid component separated by the first gas-liquid separator, and a connection line connecting the first gas-liquid separator, the second pressure-reducing valve, and the second gas-liquid separator.

상기 제1재액화라인의 제1열교환부 전단에 마련되며, 상기 2차 압축부를 통과한 증발가스를 감압시키는 제1조절밸브와, 상기 제2재액화라인의 상기 제1열교환부 전단에 마련되며, 상기 1차 압축부를 통과한 증발가스를 감압시키는 제2조절밸브와, 상기 제1재액화라인의 상기 제1열교환부 후단에 마련되며, 상기 제1열교환부를 통과한 증발가스를 감압시키는 제3조절밸브와, 상기 제2재액화라인의 상기 제2열교환부 후단에 마련되며, 상기 제2열교환부를 통과한 증발가스를 감압시키는 제4조절밸브를 더 포함할 수 있다.A first regulating valve provided at a front end of the first heat exchanging portion of the first resupply line to reduce the pressure of the evaporation gas that has passed through the secondary compression portion and a second regulating valve provided at a front end of the first heat exchanging portion of the second resuming line A second regulating valve for decompressing the evaporated gas which has passed through the primary compression section and a second regulating valve provided downstream of the first heat exchanging section of the first redistribution line for decompressing the evaporated gas passing through the first heat exchanging section, And a fourth control valve provided downstream of the second heat exchange unit of the second redistribution line for reducing the pressure of the evaporation gas passing through the second heat exchange unit.

본 발명의 실시 예에 따른 연료가스 공급시스템은 액화 효율을 향상시킬 수 있다.The fuel gas supply system according to the embodiment of the present invention can improve the liquefaction efficiency.

본 발명의 효과들은 이상에서 언급한 효과들로 제한되지 않으며, 언급되지 않은 또 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

도 1은 본 발명의 실시 예에 따른 연료가스 공급시스템을 나타낸다.1 shows a fuel gas supply system according to an embodiment of the present invention.

이하에서는 본 발명의 실시 예들을 첨부 도면을 참조하여 상세히 설명한다. 이하에 소개되는 실시 예들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상이 충분히 전달될 수 있도록 하기 위해 예로서 제공되는 것이다. 본 발명은 이하 설명되는 실시 예들에 한정되지 않고 다른 형태로 구체화될 수도 있다. 본 발명을 명확하게 설명하기 위하여 설명과 관계없는 부분은 도면에서 생략하였으며 도면들에 있어서, 구성요소의 폭, 길이, 두께 등은 편의를 위하여 과장되어 표현될 수 있다. 명세서 전체에 걸쳐서 동일한 참조번호들은 동일한 구성요소들을 나타낸다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

도 1을 참조하면, 본 발명의 실시 예에 따른 연료가스 공급시스템(100)은 엔진으로 연료가스를 공급하며, 각종 액화연료 운반선, 액화연료 RV(Regasification Vessel), 컨테이너선, 일반상선, LNG FPSO(Floating, Production, Storage and Off-loading), LNG FSRU(Floating Storage and Regasification Unit) 등을 포함하는 선박에 적용될 수 있다. Referring to FIG. 1, a fuel gas supply system 100 according to an embodiment of the present invention supplies fuel gas to an engine and is used for various liquefied fuel carriers, liquefied fuel RV (Regasification Vessel), container ship, general merchant vessel, LNG FPSO (Floating, Production, Storage and Off-loading), LNG FSRU (Floating Storage and Regasification Unit) and so on.

구체적으로 연료가스 공급시스템(100)은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크(101)와, 증발가스를 공급받아 엔진(E1)의 연료가스 공급조건에 맞게 제1압력으로 압축하는 다단 압축부(110)와, 압축된 증발가스를 액화시키는 제1열교환부(120)와, 액화된 증발가스를 기체 및 액체 성분으로 분리시키는 제1기액분리기(130)와, 저장탱크(101), 압축부(110) 및 엔진(E1)을 연결하는 연료공급라인(L1)과, 연료공급라인(L1)의 압축부(110) 후단으로부터 분기되어, 제1열교환부(120), 및 제1기액분리기(130)를 연결하는 제1재액화라인(L2)과, 제1기액분리기(130)로부터 공급된 유체를 기체 및 액체 성분으로 분리시키는 제2기액분리기(140)와, 연료공급라인(L1)의 압축부(110) 내 설정 지점으로부터 분기되어, 상술한 제1압력보다 낮은 제2압력으로 압축된 증발가스를 제1열교환부(120)를 거쳐 제2기액분리기(140)로 공급하는 제2재액화라인(L3)과, 제2재액화라인(L3)의 제1열교환부(120) 후단에 마련되고, 제1기액분리기(130)로부터 공급된 기체 성분과 제1열교환부(120)를 거친 상술한 제2압력으로 압축된 증발가스 간 열교환을 수행하는 제2열교환부(150)를 포함한다. 제2재액화라인(L3)은 예컨대 압축부(110)에 의해 4단 이상의 압축을 거친 지점으로부터 분기될 수 있다.Specifically, the fuel gas supply system 100 includes a storage tank 101 for storing the evaporated gas of the liquefied gas and the liquefied gas, a compression tank 101 for compressing the evaporated gas to the first pressure according to the fuel gas supply conditions of the engine E1 A first gas-liquid separator 130 for separating the liquefied evaporated gas into gas and liquid components, a second gas-liquid separator 130 for separating the liquefied evaporated gas into gas and liquid components, A fuel supply line L1 for connecting the compression unit 110 and the engine E1 and a fuel supply line L1 branched from the rear end of the compression unit 110 of the fuel supply line L1 and connected to the first heat exchanging unit 120, Liquid separator 130 for separating the fluid supplied from the first gas-liquid separator 130 into gas and liquid components, a second gas-liquid separator 140 for separating the fluid supplied from the first gas- L1 from the set point in the compression section 110 and supplies the evaporated gas compressed at the second pressure lower than the first pressure to the first Liquid separator 140 via the heat exchanging unit 120 and a second reclaiming line L3 provided at the rear end of the first heat exchanging unit 120 of the second reclaiming line L3, And a second heat exchanger 150 for performing heat exchange between the gas component supplied from the gas-liquid separator 130 and the evaporated gas compressed through the first heat exchanger 120 by the second pressure. The second redistribution line L3 can be branched from a point having undergone more than four stages of compression by the compression unit 110, for example.

또, 연료가스 공급시스템(100)은 제1기액분리기(130)로부터 공급된 기체 성분을 제2열교환부(150)를 거쳐 연료공급라인(L1)의 제1열교환부(120) 전단으로 합류시키는 합류라인(L4)과, 합류라인(L4)의 제2열교환부(150) 후단에 마련되며, 열교환이 수행된 기체 성분을 감압시키는 제1감압밸브(160)와, 제2기액분리기(140)에 의해 분리된 기체 성분을 합류라인(L4)의 제1감압밸브(160) 후단에 합류시키는 재순환라인(L5)을 포함한다.The fuel gas supply system 100 is configured to cause the gas component supplied from the first gas-liquid separator 130 to flow to the upstream side of the first heat exchanging unit 120 of the fuel supply line L1 via the second heat exchanging unit 150 A first pressure reducing valve 160 provided at the downstream end of the second heat exchanging unit 150 of the merging line L4 to reduce the pressure of the heat exchanged gas component, And a recirculation line L5 for joining the gas components separated by the first pressure reducing valve 160 to the downstream end of the first reducing valve 160 of the confluent line L4.

또, 연료가스 공급시스템(100)은 제1기액분리기(130)에 의해 분리된 액체 성분을 감압시키는 제2감압밸브(170)와, 감압된 액체 성분을 제2기액분리기(140)로 공급하기 위해, 제1기액분리기(130), 제2감압밸브(170) 및 제2기액분리기(140)를 연결하는 연결라인(L6)을 포함한다. 이때, 상술한 제2재액화라인(L3)은 연결라인(L6)의 제2감압밸브(170) 후단에 연결될 수 있다.The fuel gas supply system 100 further includes a second pressure reducing valve 170 for reducing the pressure of the liquid component separated by the first gas-liquid separator 130 and a second pressure reducing valve 170 for supplying the reduced pressure liquid component to the second gas- And a connection line L6 connecting the first gas-liquid separator 130, the second pressure-reducing valve 170, and the second gas-liquid separator 140 to each other. At this time, the second re-liquefaction line L3 may be connected to the rear end of the second pressure reducing valve 170 of the connection line L6.

또, 연료가스 공급시스템(100)은 제1재액화라인(L2)의 제1열교환부(120) 전단에 마련되며, 상술한 제1압력으로 압축된 증발가스를 감압시키는 제1조절밸브(V1)와, 제2재액화라인(L3)의 제1열교환부(120) 전단에 마련되며, 제2압력으로 압축된 증발가스를 감압시키는 제2조절밸브(V2)와, 제1재액화라인(L2)의 제1열교환부(120) 후단에 마련되며, 제1열교환부(120)를 거쳐 액화된 증발가스를 감압시키는 제3조절밸브(V3)와, 제2재액화라인(L3)의 제2열교환부(150) 후단에 마련되며, 제2열교환부(150)를 거친 증발가스를 감압시키는 제4조절밸브(V4)를 포함한다.The fuel gas supply system 100 is provided at the upstream end of the first heat exchanging unit 120 of the first remanufacturing line L2 and includes a first control valve V1 for reducing the pressure of the evaporation gas compressed by the first pressure, A second regeneration valve V2 provided at a front end of the first heat exchanging unit 120 of the second reclosing line L3 for reducing the pressure of the evaporation gas compressed by the second pressure, A third regulating valve V3 provided downstream of the first heat exchanging part 120 of the second regenerating line L2 and reducing the pressure of the evaporated gas liquefied through the first heat exchanging part 120, And a fourth control valve (V4) provided downstream of the second heat exchanging part (150) for reducing the pressure of the evaporation gas passing through the second heat exchanging part (150).

상술한 저장탱크(101)는 단열상태를 유지하면서 연료를 액화상태로 저장하는 멤브레인형 탱크, SPB형 탱크 등을 포함할 수 있다. 저장탱크(101)에 저장된 액화가스는 액화상태로 저장할 수 있는 LNG(Liquefied Natural Gas), LPG(Liquefied Petroleum Gas), DME(Dimethylether), 에탄(Ethane) 중 어느 하나일 수 있으나 이에 한정되는 것은 아니다. The above-described storage tank 101 may include a membrane type tank, an SPB type tank, and the like, which store the fuel in a liquefied state while maintaining an adiabatic state. The liquefied gas stored in the storage tank 101 may be any one of Liquefied Natural Gas (LNG), Liquefied Petroleum Gas (LPG), Dimethylether (DME), and Ethane which can be stored in a liquefied state, but is not limited thereto .

저장탱크(101) 내부압력은 저장하는 액화가스가 LNG일 경우 1bar로 유지되거나 연료공급조건을 고려해 그보다 높은 압력으로 유지될 수 있다. 저장탱크(101) 내부온도는 LNG의 액화상태 유지를 위해 ―163℃도 정도로 유지될 수 있다. 저장탱크(101)에 저장된 액화가스의 증발가스는 연료공급라인(L1)을 통해 엔진(E1)으로 공급된다.The internal pressure of the storage tank 101 may be maintained at 1 bar when the liquefied gas to be stored is LNG, or may be maintained at a pressure higher than the 1 bar considering the fuel supply conditions. The internal temperature of the storage tank 101 may be maintained at about -163 DEG C to maintain the liquefied state of the LNG. The evaporated gas of the liquefied gas stored in the storage tank 101 is supplied to the engine E1 through the fuel supply line L1.

압축부(110)는 교대로 배치된 복수의 압축기(111)와 냉각기(112)를 포함하도록 구성될 수 있으며, 저장탱크(101)로부터 공급된 액화가스의 증발가스를 엔진(E1)의 연료가스 공급조건에 맞게 압축시킨다. 엔진(E1)은 예컨대 ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압가스 분사엔진일 수 있다. 엔진(E1)에서 필요로 하는 연료 소모량보다 많은 압축된 증발가스가 공급된 경우, 잉여분의 압축된 증발가스는 제1재액화라인(L2)으로 흘러 들어간다.The compression unit 110 may be configured to include a plurality of alternately arranged compressors 111 and a cooler 112 and may supply the evaporated gas of the liquefied gas supplied from the storage tank 101 to the fuel gas Compress to meet supply conditions. The engine E1 may be, for example, a high-pressure gas injection engine such as an ME-GI engine (Gas Injection engine manufactured by Man B & W). If more compressed evaporative gas is supplied than the fuel consumption required by the engine E1, the surplus compressed evaporative gas flows into the first resupply line L2.

제1열교환부(120)는 연료공급라인(L1)을 통해 저장탱크(101)로부터 공급된 증발가스와, 제1재액화라인(L2)을 통해 공급된 상술한 제1압력으로 압축된 증발가스와, 제2재액화라인(L3)을 통해 공급된 상술한 제2압력으로 압축된 증발가스 간 열교환이 수행되도록 한다. The first heat exchanging unit 120 is connected to the evaporation gas supplied from the storage tank 101 through the fuel supply line L1 and the evaporation gas compressed through the first re-liquefaction line L2, And the evaporated gas compressed at the above-mentioned second pressure supplied through the second redistribution line (L3).

이때, 제1재액화라인(L2)을 통해 공급받은 제1압력으로 압축된 증발가스와 제2재액화라인(L3)을 통해 공급받은 제2압력으로 압축된 증발가스는 서로 다른 압력을 가지면서 제1열교환부(120)를 거치게 된다. 그리고, 제1열교환부(120)에서 저장탱크(101)로부터 공급된 증발가스와 열교환을 수행하여 액화되며, 이를 통해 핀치 포인트(Pinch Point)를 완화하여 액화 효율을 향상시킬 수 있다. At this time, the evaporated gas compressed at the first pressure supplied through the first re-liquefaction line (L2) and the evaporated gas compressed at the second pressure supplied through the second remelting line (L3) have different pressures And passes through the first heat exchanging part (120). In addition, heat exchange with the evaporation gas supplied from the storage tank 101 in the first heat exchanging unit 120 is performed and liquefied, thereby improving the liquefaction efficiency by alleviating the pinch point.

또, 제1재액화라인(L2)을 통해 공급받은 제1압력으로 압축된 증발가스와 제2재액화라인(L3)을 통해 공급받은 제2압력으로 압축된 증발가스는 제1열교환부(120) 전단에서 각각 제1조절밸브(V1)와 제2조절밸브(V2)에 의해 감압될 수 있으며, 이를 통해 액화 효율을 높일 수 있다.The evaporated gas compressed at the first pressure supplied through the first re-liquefaction line (L2) and compressed at the second pressure supplied through the second remelting line (L3) are supplied to the first heat exchanger 120 ) Can be reduced by the first control valve V1 and the second control valve V2 at the front end, respectively, thereby improving the liquefaction efficiency.

제1기액분리기(130)에 의해 분리된 기체 성분은 제2열교환부(150)를 통해 제1열교환부(120)를 거친 제2압력으로 압축된 증발가스와 열교환을 수행하여 냉열을 전달한다. 그리고, 제1감압밸브(160)를 거친 후, 연료공급라인(L1)의 제1열교환부(120) 전단으로 공급되어 저장탱크(101)로부터 공급된 증발가스에 합류된다.The gas component separated by the first gas-liquid separator 130 is heat-exchanged with the evaporated gas compressed by the second pressure through the first heat exchanging unit 120 through the second heat exchanging unit 150 to transfer cold heat. After passing through the first pressure reducing valve 160, the refrigerant is supplied to the front end of the first heat exchanging unit 120 of the fuel supply line L1 and merged with the evaporated gas supplied from the storage tank 101. [

이때, 제2기액분리기(140)에 의해 분리된 기체 성분은 합류라인(L4)의 제1감압밸브(160) 후단으로 공급되어 제1기액분리기(130)에 의해 분리된 기체 성분과 합류될 수 있다. 제2기액분리기(140)에 의해 분리된 기체 성분은 질소 성분의 함유량이 적으므로, 제1열교환부(120)의 액화 효율이 향상될 수 있다.At this time, the gas component separated by the second gas-liquid separator 140 may be supplied to the downstream end of the first pressure reducing valve 160 of the merging line L4 and may be combined with the gas component separated by the first gas-liquid separator 130 have. Since the gas component separated by the second gas-liquid separator 140 has a small content of the nitrogen component, the liquefaction efficiency of the first heat exchanging unit 120 can be improved.

제2기액분리기(140)에 의해 분리된 액체 성분은 회수라인(L7)을 통해 저장탱크(101)로 공급될 수 있다.The liquid component separated by the second gas-liquid separator 140 may be supplied to the storage tank 101 through the recovery line L7.

이상에서는 특정의 실시 예에 대하여 도시하고 설명하였다. 그러나, 본 발명은 상기한 실시 예에만 한정되지 않으며, 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하의 청구범위에 기재된 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경 실시할 수 있을 것이다.The foregoing has shown and described specific embodiments. However, it is to be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the scope of the technical idea of the present invention described in the following claims It will be possible.

101: 저장탱크 110: 압축부
120, 150: 열교환부 130, 140: 기액분리기
160, 170: 감압밸브 L1: 연료공급라인
L2: 제1재액화라인 L3: 제2재액화라인
L4: 합류라인 L5: 재순환라인
V1~V4: 조절밸브101: storage tank 110: compression section
120, 150: heat exchanger 130, 140: gas-liquid separator
160, 170: Reducing valve L1: Fuel supply line
L2: first redistribution line L3: second redistribution line
L4: Merge line L5: Recirculation line
V1 ~ V4: Regulating valve

Claims (4)

액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크;
상기 증발가스를 압축하는 다단 압축부;
상기 저장탱크, 상기 압축부 및 엔진을 연결하는 연료공급라인;
상기 연료공급라인의 상기 압축부 후단에서 분기되어, 상기 압축부에 의해 제1압력으로 압축된 증발가스를 공급하는 제1재액화라인;
상기 압축부 내 설정 지점으로부터 분기되어, 상기 제1압력보다 낮은 제2압력으로 압축된 증발가스를 공급하는 제2재액화라인;
상기 압축부를 거쳐 상기 제1재액화라인 및 상기 제2재액화라인을 통해 각각 다른 압력으로 공급되는 증발가스와 상기 저장탱크로부터 공급된 증발가스 간 열교환을 수행하는 제1열교환부;
상기 제1재액화라인의 상기 열교환부 후단에 마련되고, 상기 제1재액화라인을 통해 상기 제1열교환부를 통과한 증발가스를 기체 및 액체 성분으로 1차 분리시키는 제1기액분리기;
상기 제2재액화라인의 상기 열교환부 후단에 마련되고, 상기 제1기액분리기에서 분리된 기체 성분과 상기 제2재액화라인을 통해 상기 제1열교환부를 통과한 증발가스 간 열교환을 수행하는 제2열교환부; 및
상기 제1기액분리기에 의해 분리된 액체 성분과 상기 제2재액화라인을 통해 상기 제2열교환부를 거친 증발가스의 혼합물을 기체 및 액체 성분으로 2차 분리시키는 제2기액분리기;를 포함하는 연료가스 공급시스템.A storage tank for storing a liquefied gas and an evaporation gas of the liquefied gas;
A multi-stage compression unit for compressing the evaporation gas;
A fuel supply line connecting the storage tank, the compression unit, and the engine;
A first redistribution line branching at a downstream end of the compression section of the fuel supply line and supplying an evaporation gas compressed by the compression section to a first pressure;
A second re-liquefaction line branching from a set point in the compression section, for supplying an evaporated gas compressed at a second pressure lower than the first pressure;
A first heat exchanger for performing heat exchange between the evaporated gas supplied at different pressures through the first redistribution line and the second redistribution line through the compression unit and the evaporated gas supplied from the storage tank;
A first gas-liquid separator provided at a downstream end of the heat exchanging portion of the first re-liquefaction line for primarily separating the vaporized gas passed through the first heat-exchanging portion into gas and liquid components through the first re-liquefaction line;
And a second gas-liquid separator provided at a downstream end of the heat exchanging section of the second redistribution line for performing heat exchange between the gas component separated by the first gas-liquid separator and the evaporating gas passing through the first redistribution line through the second redistribution line, A heat exchange unit; And
And a second gas-liquid separator for secondarily separating the mixture of the liquid component separated by the first gas-liquid separator and the evaporation gas passed through the second heat-exchanging section through the second remelting line into a gas and a liquid component, Supply system. 제1항에 있어서,
상기 제1기액분리기에서 분리된 기체 성분을 상기 제2열교환부를 거쳐 상기 연료공급라인의 다단 압축부 전단으로 합류시키는 합류라인과,
상기 합류라인의 제2열교환부 후단에 마련되며, 상기 제2열교환부를 거친 상기 기체 성분을 감압시키는 제1감압밸브와,
상기 제2기액분리기에 의해 분리된 기체 성분을 상기 합류라인의 제1감압밸브 후단에 합류시키는 재순환라인을 더 포함하는 연료가스 공급시스템.The method according to claim 1,
A joining line for joining the gas components separated in the first gas-liquid separator to the front end of the multi-stage compression section of the fuel supply line via the second heat exchanging section,
A first pressure reducing valve provided downstream of the second heat exchanging portion of the merging line for reducing the pressure of the gas component passing through the second heat exchanging portion,
And a recirculation line for joining the gas component separated by the second gas-liquid separator to a downstream end of the first pressure reducing valve of the merging line. 제1항에 있어서,
상기 제1기액분리기에 의해 분리된 액체 성분을 감압시키는 제2감압밸브와,
상기 제1기액분리기, 상기 제2감압밸브 및 상기 제2기액분리기를 연결하는 연결라인을 더 포함하는 연료가스 공급시스템.The method according to claim 1,
A second pressure reducing valve for reducing the pressure of the liquid component separated by the first gas-liquid separator,
And a connection line connecting the first gas-liquid separator, the second pressure-reducing valve, and the second gas-liquid separator. 제1항에 있어서,
상기 제1재액화라인의 제1열교환부 전단에 마련되며, 상기 압축부를 거쳐 상기 제1압력으로 압축된 증발가스를 감압시키는 제1조절밸브와,
상기 제2재액화라인의 상기 제1열교환부 전단에 마련되며, 상기 압축부를 거쳐 상기 제2압력으로 압축된 증발가스를 감압시키는 제2조절밸브와,
상기 제1재액화라인의 상기 제1열교환부 후단에 마련되며, 상기 제1재액화라인을 통해 상기 제1열교환부를 통과한 증발가스를 감압시키는 제3조절밸브와,
상기 제2재액화라인의 상기 제2열교환부 후단에 마련되며, 상기 제2재액화라인을 통해 상기 제2열교환부를 통과한 증발가스를 감압시키는 제4조절밸브를 더 포함하는 연료가스 공급시스템.The method according to claim 1,
A first regulating valve provided upstream of the first heat exchange unit of the first resupply line for reducing the pressure of the evaporation gas compressed by the first pressure through the compression unit,
A second control valve provided at a front end of the first heat exchange unit of the second redistribution line for reducing the pressure of the evaporation gas compressed by the second pressure via the compression unit,
A third regulating valve provided downstream of the first heat exchanging portion of the first resupplying line for reducing the pressure of the evaporation gas passing through the first heat exchanging portion through the first resuming line,
Further comprising a fourth control valve provided downstream of the second heat exchanger of the second redistribution line for reducing the pressure of the evaporative gas passing through the second redistribution line through the second redistribution line.
KR1020150090966A 2015-06-26 2015-06-26 Fuel gas supply system KR101711951B1 (en)

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