KR20100044420A - Apparatus and mthod for supplying fuel gas in lng carrier - Google Patents

Apparatus and mthod for supplying fuel gas in lng carrier Download PDF

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KR20100044420A
KR20100044420A KR1020080103550A KR20080103550A KR20100044420A KR 20100044420 A KR20100044420 A KR 20100044420A KR 1020080103550 A KR1020080103550 A KR 1020080103550A KR 20080103550 A KR20080103550 A KR 20080103550A KR 20100044420 A KR20100044420 A KR 20100044420A
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South Korea
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fuel gas
gas supply
supply line
engine
lng
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KR1020080103550A
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Korean (ko)
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KR101049229B1 (en
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조익규
권순빈
김남수
조완희
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대우조선해양 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0242—Shut-off valves; Check valves; Safety valves; Pressure relief valves
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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

Abstract

PURPOSE: A device and a method for supplying fuel gas of an LNG carrier are provided to use a fuel gas for propulsion as the fuel gas for generation by forcedly vaporizing and compressing the fuel gas for propulsion with a high pressure pump and a high pressure vaporizer. CONSTITUTION: A fuel gas supply apparatus of an LNG carrier includes a propulsion fuel gas supply line(L1), a high pressure pump(6), a high pressure vaporizer(7), a fuel gas supplying line for generation, and a pressure control unit. The fuel gas supplying line for generation is connected from the lower side of an LNG storage tank(1) to an engine(2) for ship propulsion. A high pressure pump is installed in the fuel gas supply line for the propulsion. The high pressure vaporizer is installed in the fuel gas supply line for the propulsion of the rear side of the high pressure pump. The fuel gas supply line for generation is connected from the fuel gas supply line for propulsion to the engine for generation. A pressure control is installed in the fuel gas supply line for generation.

Description

ＬＮＧ 운반선의 연료가스 공급 장치 및 방법{APPARATUS AND MTHOD FOR SUPPLYING FUEL GAS IN LNG CARRIER}Apparatus and method for supplying fuel gas for LNK carriers {APPARATUS AND MTHOD FOR SUPPLYING FUEL GAS IN LNG CARRIER}

본 발명은 LNG 운반선의 연료가스 공급 장치 및 방법에 관한 것으로서, 더욱 상세하게는, LNG 운반선에서 선박추진용 엔진과 발전용 엔진에 연료가스를 공급하기 위한 장치에 관한 것이다.The present invention relates to a fuel gas supply apparatus and method for an LNG carrier, and more particularly, to an apparatus for supplying fuel gas to a ship propulsion engine and a power generation engine in an LNG carrier.

일반적으로, 천연가스는 생산지에서 극저온으로 액화된 액화천연가스(Liquefied Natural Gas, 이하 LNG라 함)의 상태로 만들어진 후 LNG 운반선에 의해 목적지까지 원거리에 걸쳐 수송된다.In general, natural gas is made in the form of liquefied natural gas (Liquefied Natural Gas, hereinafter referred to as LNG) at the production site, and then transported to a destination by an LNG carrier over a long distance.

LNG 운반선에서는 항해 중에 선박에 필요한 전기를 발생시키기 위해서 발전용 엔진이 설치되어 있다. 발전용 엔진은 오일(Oil) 만을 연료로서 사용하는 디젤 엔진과 오일과 가스를 모두 연료로서 사용하는 DFDE(Dual Fuel Diesel Electric, 이중 연료 디젤-전기 방식) 엔진으로 분류된다.In LNG carriers, power generation engines are installed to generate electricity for ships during navigation. Power generation engines are classified into diesel engines using only oil as fuel and dual fuel diesel electric (DFDE) engines using both oil and gas as fuel.

보통은 발전만을 목적으로 하는 경우에 디젤 엔진을 사용하지만, OPEX 절감을 위해 DFDE 엔진을 사용할 수 있는데, 이 경우 별도의 압축기와 기타 열교환 장비가 필요하므로 설비 비용이 증가하는 문제점이 있다. Usually, a diesel engine is used for the purpose of power generation only, but a DFDE engine can be used to reduce OPEX. In this case, a separate compressor and other heat exchange equipment are required, thereby increasing the installation cost.

따라서, 본 발명은, 이러한 종래기술의 문제점을 해결하기 위한 것으로서, 발전용 DFDE 엔진으로 연료가스를 공급하기 위해 별도의 압축기와 기타 열교환 장비를 사용하지 않고 LNG 운반선에 선박의 추진을 위해 기존에 설치된 구성요소들을 이용할 수 있도록 구성된 LNG 운반선의 연료가스 공급 장치 및 방법을 제공하는 것을 그 목적으로 한다.Therefore, the present invention, which is to solve the problems of the prior art, is conventionally installed for the propulsion of the vessel in the LNG carrier without using a separate compressor and other heat exchange equipment to supply fuel gas to the power generation DFDE engine It is an object of the present invention to provide a fuel gas supply apparatus and method for LNG carriers configured to use the components.

전술한 목적을 달성하기 위해, 본 발명의 LNG 운반선의 연료가스 공급 장치는, LNG 저장탱크에 LNG를 적재하여 운반하는 LNG 운반선에서 선박추진용 엔진과 발전용 엔진에 연료가스를 공급하는 장치로서, 상기 LNG 저장탱크 내의 하부로부터 상기 선박추진용 엔진까지 연결된 추진용 연료가스 공급라인과, 상기 추진용 연료가스 공급라인의 도중에 설치된 고압 펌프와, 상기 고압 펌프의 후단의 상기 추진용 연료가스 공급라인에 설치된 고압 기화기와, 상기 고압 기화기의 후단의 상기 추진용 연료가스 공급라인의 도중에서 분기되어 상기 발전용 엔진까지 연결된 발전용 연료가스 공급라인과, 상기 발전용 연료가스 공급라인의 도중에 설치된 압력조절수단을 포함하는 것을 특징으로 한다.In order to achieve the above object, the fuel gas supply apparatus of the LNG carrier of the present invention is a device for supplying fuel gas to the ship propulsion engine and the power generation engine in the LNG carrier to load and transport the LNG in the LNG storage tank, A propulsion fuel gas supply line connected from a lower portion of the LNG storage tank to the ship propulsion engine, a high pressure pump installed in the middle of the propulsion fuel gas supply line, and a propulsion fuel gas supply line at a rear end of the high pressure pump. A high pressure vaporizer installed, a power generation fuel gas supply line branched in the middle of the propulsion fuel gas supply line at a rear end of the high pressure vaporizer, and connected to the power generation engine, and a pressure regulating means provided in the middle of the power generation fuel gas supply line Characterized in that it comprises a.

또한, 본 발명의 LNG 운반선의 연료가스 공급 방법은, LNG 저장탱크에 LNG를 적재하여 운반하는 LNG 운반선에서 선박추진용 엔진과 발전용 엔진에 연료가스를 공급하는 방법으로서, 상기 LNG 운반선의 LNG 저장탱크로부터 LNG를 빼내어서 고압 으로 압축시키고 강제 기화시켜서 상기 선박추진용 엔진에 추진용 연료가스로서 공급하되 상기 고압으로 압축되어 강제 기화된 추진용 연료가스의 일부를 감압시켜 상기 발전용 엔진으로 공급하는 것을 특징으로 한다.In addition, the fuel gas supply method of the LNG carrier of the present invention is a method for supplying fuel gas to the ship propulsion engine and the power generation engine in the LNG carrier that loads and transports LNG in the LNG storage tank, LNG storage of the LNG carrier It extracts LNG from the tank, compresses it to high pressure, forcibly vaporizes it, and supplies it to the ship propulsion engine as a propulsion fuel gas. It is characterized by.

전술한 바와 같이, 본 발명에 의하면, 발전용 DFDE 엔진에 연료가스를 공급함에 있어 추진용 연료가스 공급라인에서 고압 펌프와 고압 기화기를 거치면서 고압으로 압축되어 강제 기화된 추진용 연료가스를 발전용 연료가스로서 사용하므로, 별도의 압축기와 기타 열교환 장비를 사용하지 않고서도 발전용 엔진인 DFDE 엔진에 발전용 연료가스를 공급할 수 있게 되어, 척당 약 30만불의 비용 절감 효과가 있다.As described above, according to the present invention, in supplying fuel gas to the power generation DFDE engine, the fuel gas for propulsion is compressed to high pressure while being forcibly vaporized through a high pressure pump and a high pressure vaporizer in a propulsion fuel gas supply line for power generation. Since it is used as fuel gas, it is possible to supply fuel gas for power generation to the DFDE engine, which is a power generation engine, without using a separate compressor and other heat exchange equipment, resulting in a cost reduction of about $ 300,000 per chuck.

또한, 본 발명에 의하면, 고압으로 압축되어 강제 기화된 후 감압된 추진용 연료가스와 LNG 저장탱크의 상부의 증발가스를 가스 이젝터를 통해 혼합 분사하여 연료가스 DFDE 엔진의 발전용 연료가스로서 사용함으로써 LNG 저장탱크 내에서 발생된 증발가스가 처리되므로, LNG 저장탱크 내의 압력이 적절하게 조절될 수 있는 효과가 있다.In addition, according to the present invention, by mixing and spraying the fuel gas for compression and the vaporization of the reduced pressure of the propulsion fuel gas and the upper portion of the LNG storage tank through a gas ejector to be used as the fuel gas for power generation of the fuel gas DFDE engine Since the boil-off gas generated in the LNG storage tank is processed, there is an effect that the pressure in the LNG storage tank can be properly adjusted.

이하, 첨부된 도면을 참조로 하여 본 발명의 바람직한 실시예를 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 LNG 운반선의 연료가스 공급 장치를 개략적으로 나타낸 도면이다.1 is a view schematically showing a fuel gas supply apparatus of an LNG carrier according to an embodiment of the present invention.

본 실시예에 따른 LNG 운반선의 연료가스 공급 장치는, LNG 운반선의 선박추진용 엔진으로서 고압가스 분사엔진, 예를 들어, ME-GI 엔진(MAN B&W Diesel사 제품)을 사용하고 있다.The fuel gas supply apparatus of the LNG carrier according to the present embodiment uses a high-pressure gas injection engine, for example, a ME-GI engine (manufactured by MAN B & W Diesel) as the engine for ship propulsion of the LNG carrier.

본 발명의 LNG 운반선의 연료가스 공급 장치는 LNG 운반선의 LNG 저장탱크(1)로부터 LNG를 빼내어서 고압으로 압축시키고 고압으로 강제 기화시켜서 ME-GI 엔진(2)에 추진용 연료로서 공급한다. 이를 위해, 본 발명에서는 LNG 저장탱크(1) 내에 설치된 스프레이용 펌프(4)로부터 ME-GI 엔진(2)까지 추진용 연료가스 공급라인(L1)을 연결하고, 이 추진용 연료가스 공급라인(L1)의 도중에 버퍼 탱크(5)를 설치하고, 이 버퍼 탱크(5)의 후단의 추진용 연료가스 공급라인(L1)에 고압 펌프(6)를 설치하고, 이 고압 펌프(6)의 후단의 추진용 연료가스 공급라인(L1)에 고압 기화기(7)를 설치한 것이다.The fuel gas supply apparatus of the LNG carrier of the present invention extracts LNG from the LNG storage tank 1 of the LNG carrier, compresses it to high pressure, forcibly vaporizes it to high pressure, and supplies it to the ME-GI engine 2 as a fuel for propulsion. To this end, in the present invention, the propulsion fuel gas supply line (L1) is connected from the spray pump (4) installed in the LNG storage tank (1) to the ME-GI engine (2), and the propulsion fuel gas supply line ( A buffer tank 5 is provided in the middle of L1, and a high pressure pump 6 is provided in the propulsion fuel gas supply line L1 at the rear end of the buffer tank 5, and the rear end of the high pressure pump 6 is provided. The high pressure vaporizer 7 is installed in the propulsion fuel gas supply line L1.

LNG 저장탱크(1)의 온도를 낮추기 위해, LNG 저장탱크(1) 내의 하부의 LNG를 LNG 저장탱크(1) 내의 상부로 보내어서 분사하게 되는데, LNG 저장탱크(1) 내의 하부에는 LNG 저장탱크(1) 내의 하부의 LNG를 LNG 저장탱크(1) 내의 상부로 보내기 위한 스프레이용 펌프(4)가 기본적으로 설치되어 있다.In order to lower the temperature of the LNG storage tank (1), the lower LNG in the LNG storage tank (1) is sent to the upper portion in the LNG storage tank (1) and injected, the lower portion in the LNG storage tank (1) LNG storage tank The spray pump 4 for sending the lower LNG in (1) to the upper part in the LNG storage tank 1 is basically provided.

본 실시예에서는 발전용 엔진으로서 DFDE 엔진(3)을 사용하며, 고압 기화기(7)의 후단의 추진용 연료가스 공급라인(L1)의 도중에서 발전용 연료가스 공급라인(L2)을 분기하여 DFDE 엔진(3)까지 연결하고 있다. 이에 의해, DFDE 엔진(3)에는 추진용 연료가스 공급라인(L1)의 고압 펌프(6)와 고압 기화기(7)를 거치면서 고압으로 압축되어 강제 기화된 추진용 연료가스가 발전용 연료가스로서 공급된다.In this embodiment, the DFDE engine 3 is used as the engine for power generation, and the fuel gas supply line L2 for power generation is branched in the middle of the propulsion fuel gas supply line L1 at the rear end of the high-pressure vaporizer 7. The engine 3 is also connected. As a result, the DFDE engine 3 is a fuel gas for power generation which is compressed and forced vaporized at high pressure while passing through the high pressure pump 6 and the high pressure vaporizer 7 of the propulsion fuel gas supply line L1. Supplied.

DFDE 엔진(3)에 발전용으로 공급되는 연료가스는 ME-GI 엔진에 추진용으로 공급되는 연료가스보다 압력이 낮아야 하므로, 발전용 연료가스 공급라인(L2)의 도중에는 압력조절밸브(8)가 설치되어 있다. 추진용 연료가스 공급라인(L1)에서 고압 펌프(6)와 고압 기화기(7)를 거치면서 고압으로 압축되어 강제 기화된 추진용 연료가스는, 압력조절밸브(8)에 의해 DFDE 엔진(3)에 적합한 압력으로 감압되어 DFDE 엔진(3)으로 공급된다. 본 실시예에서는 발전용 연료가스 공급라인(L2)의 도중에 압력조절밸브(8)가 2개 설치된 것으로 예시되어 있다.Since the fuel gas supplied to the DFDE engine 3 for power generation must have a lower pressure than the fuel gas supplied to the ME-GI engine for propulsion, the pressure regulating valve 8 is provided in the middle of the fuel gas supply line L2 for power generation. It is installed. The propulsion fuel gas compressed and forced vaporized at a high pressure while passing through the high pressure pump 6 and the high pressure vaporizer 7 in the propulsion fuel gas supply line L1 is supplied to the DFDE engine 3 by the pressure regulating valve 8. It is supplied to the DFDE engine 3 after being decompressed to a suitable pressure. In this embodiment, two pressure control valves 8 are illustrated in the middle of the fuel gas supply line L2 for power generation.

따라서, 본 실시예에 의하면, 추진용 연료가스 공급라인(L1)에서 고압 펌프(6)와 고압 기화기(7)를 거치면서 고압으로 압축되어 강제 기화된 추진용 연료가스를 압력조절밸브(8)에 의해 감압시킨 후 DFDE 엔진에 공급하여 발전용 연료가스로서 사용하므로, 별도의 압축기와 기타 열교환 장비를 사용하지 않고서도 발전용 엔진인 DFDE 엔진에 발전용 연료가스를 공급할 수 있게 되어, 척당 약 30만불의 비용 절감 효과가 있게 된다.Therefore, according to the present embodiment, the pressure control valve 8 receives the pressure-enhanced fuel gas compressed by high pressure while passing through the high-pressure pump 6 and the high-pressure vaporizer 7 in the propulsion fuel gas supply line L1. After depressurizing the gas, it is supplied to the DFDE engine and used as fuel gas for power generation. Thus, it is possible to supply the fuel gas for power generation to the DFDE engine, which is a power engine, without using a separate compressor and other heat exchange equipment. It will cost $ 10,000.

한편, 천연가스의 액화온도는 상압 -163℃의 극저온이므로, LNG는 그 온도가 상압 -163℃ 보다 약간만 높아도 증발된다. LNG 운반선의 LNG 저장탱크(1)의 경우 단열처리가 되어 있기는 하지만, 외부의 열이 LNG에 지속적으로 전달되므로, LNG 운반선에 의해 LNG를 수송하는 도중에 LNG가 LNG 저장탱크(1) 내에서 지속적으로 자연 기화되어 LNG 저장탱크(1) 내에 증발가스(Boil-Off Gas)가 발생한다.On the other hand, since the liquefaction temperature of natural gas is a cryogenic temperature of atmospheric pressure -163 ℃, LNG is evaporated even if the temperature is only slightly higher than the atmospheric pressure -163 ℃. The LNG storage tank (1) of the LNG carrier is insulated, but since the external heat is continuously transmitted to the LNG, LNG is continuously maintained in the LNG storage tank (1) while the LNG is being transported by the LNG carrier. Naturally vaporized into the LNG storage tank (1) generates boil-off gas (Boil-Off Gas).

LNG 운반선에서는, LNG 저장탱크(1) 내에 증발가스가 축적되면 LNG 저장탱크(1) 내의 압력이 과도하게 상승하므로, LNG 저장탱크(1) 내에서 발생하는 증발가 스를 처리해야 한다.In an LNG carrier, when the boil-off gas accumulates in the LNG storage tank 1, the pressure in the LNG storage tank 1 rises excessively, and thus the evaporation gas generated in the LNG storage tank 1 must be treated.

이를 위해, 고압 기화기(7)의 후단의 추진용 연료가스 공급라인(L1)의 도중에는 증발가스 혼합용 연료가스 공급라인(L3)이 분기되어 발전용 연료가스 공급라인(L2)의 도중에 연결되고, 증발가스 혼합용 연료가스 공급라인(L3)의 도중에는 가스 이젝터(9)가 설치되어 있으며, LNG 저장탱크(1)의 상부로부터 가스 이젝터(9)에는 증발가스 공급라인(L4)이 연결되어 있다. 증발가스 혼합용 연료가스 공급라인(L3)은 추진용 연료가스 공급라인(L1)의 도중에서 발전용 연료가스 공급라인(L2)과의 분기점 전단으로부터 분기되는 것이 바람직하다.To this end, in the middle of the propulsion fuel gas supply line (L1) of the rear end of the high-pressure vaporizer (7) is branched fuel gas supply line (L3) for mixing boil-off gas is connected in the middle of the fuel gas supply line (L2) for power generation, A gas ejector 9 is provided in the middle of the fuel gas supply line L3 for mixing the boil-off gas, and an boil-off gas supply line L4 is connected to the gas ejector 9 from the upper portion of the LNG storage tank 1. The boil-off gas mixing fuel gas supply line L3 is preferably branched from a branch point front end with the power generation fuel gas supply line L2 in the middle of the propellant fuel gas supply line L1.

가스 이젝터(9)의 전단의 증발가스 혼합용 연료가스 공급라인(L3)에도 압력조절밸브(8)가 설치되어 있다.The pressure regulating valve 8 is also provided in the fuel gas supply line L3 for mixing the boil-off gas at the front end of the gas ejector 9.

가스 이젝터(9)는 추진용 연료가스 공급라인(L1)에서 고압 펌프(6)와 고압 기화기(7)를 거치면서 고압으로 압축되어 강제 기화된 후 압력조절밸브(8)에 의해 감압된 추진용 연료가스와 LNG 저장탱크(1)의 상부의 증발가스를 혼합한 후 발전용 연료가스 공급라인(L2)으로 분사하여 공급한다. 이에 의해, LNG 저장탱크(1) 내에서 발생된 증발가스가 DFDE 엔진(3)의 발전용 연료가스로서 사용되어 처리되므로, LNG 저장탱크(1) 내의 압력이 적절하게 조절될 수 있다.The gas ejector 9 is compressed to high pressure through the high pressure pump 6 and the high pressure vaporizer 7 in the propulsion fuel gas supply line L1, and is forcibly vaporized and then depressurized by the pressure regulating valve 8. After the fuel gas and the boil-off gas of the upper portion of the LNG storage tank 1 are mixed, the fuel gas is injected and supplied to the fuel gas supply line L2 for power generation. Thereby, since the boil-off gas generated in the LNG storage tank 1 is used and processed as the fuel gas for power generation of the DFDE engine 3, the pressure in the LNG storage tank 1 can be adjusted appropriately.

이상에서는 본 발명이 특정 실시예를 중심으로 하여 설명되었지만, 본 발명의 취지 및 첨부된 특허청구범위 내에서 다양한 변형, 변경 또는 수정이 당해 기술분야에서 있을 수 있으며, 따라서, 전술한 설명 및 도면은 본 발명의 기술사상을 한정하는 것이 아닌 본 발명을 예시하는 것으로 해석되어져야 한다.While the invention has been described above with reference to specific embodiments, various modifications, changes or modifications may be made in the art within the spirit and scope of the appended claims, and thus, the foregoing description and drawings It should be construed as illustrating the present invention rather than limiting the technical spirit of the present invention.

도 1은 본 발명의 실시예에 따른 LNG 운반선의 연료가스 공급 장치를 개략적으로 나타낸 도면이다.1 is a view schematically showing a fuel gas supply apparatus of an LNG carrier according to an embodiment of the present invention.

<도면의 주요부분에 대한 부호 설명><Description of Signs of Major Parts of Drawings>

1 : LNG 저장탱크1: LNG Storage Tank

2 : ME-GI 엔진2: ME-GI engine

3 : DFDE 엔진3: DFDE engine

4 : 스프레이용 펌프4: Pump for spray

5 : 버퍼 탱크5: buffer tank

6 : 고압 펌프6: high pressure pump

7 : 고압 기화기7: high pressure vaporizer

8 : 압력조절밸브8: Pressure regulating valve

9 : 가스 이젝터9: gas ejector

L1 : 추진용 연료가스 공급라인L1: propulsion fuel gas supply line

L2 : 발전용 연료가스 공급라인L2: Fuel Gas Supply Line for Power Generation

L3 : 증발가스 혼합용 연료가스 공급라인L3: Fuel gas supply line for boil-off gas mixture

L4 : 증발가스 공급라인L4: Boil off gas supply line

Claims (11)

LNG 저장탱크에 LNG를 적재하여 운반하는 LNG 운반선에서 선박추진용 엔진과 발전용 엔진에 연료가스를 공급하는 장치로서,As a device for supplying fuel gas to a ship propulsion engine and a power generation engine in an LNG carrier that loads and transports LNG in an LNG storage tank, 상기 LNG 저장탱크 내의 하부로부터 상기 선박추진용 엔진까지 연결된 추진용 연료가스 공급라인과,A propulsion fuel gas supply line connected from a lower portion of the LNG storage tank to the ship propulsion engine; 상기 추진용 연료가스 공급라인의 도중에 설치된 고압 펌프와,A high pressure pump installed in the middle of the propulsion fuel gas supply line; 상기 고압 펌프의 후단의 상기 추진용 연료가스 공급라인에 설치된 고압 기화기와,A high pressure vaporizer installed in the propulsion fuel gas supply line at a rear end of the high pressure pump; 상기 고압 기화기의 후단의 상기 추진용 연료가스 공급라인의 도중에서 분기되어 상기 발전용 엔진까지 연결된 발전용 연료가스 공급라인과,A power generation fuel gas supply line branched from the middle of the propulsion fuel gas supply line at the rear end of the high pressure vaporizer and connected to the power generation engine; 상기 발전용 연료가스 공급라인의 도중에 설치된 압력조절수단을 포함하는 것을 특징으로 하는 LNG 운반선의 연료가스 공급 장치.Fuel gas supply apparatus of the LNG carrier, characterized in that it comprises a pressure adjusting means installed in the middle of the fuel gas supply line for power generation. 청구항 1에 있어서,The method according to claim 1, 상기 선박추진용 엔진은 ME-GI 엔진이고, 상기 발전용 엔진은 DFDE 엔진인 것을 특징으로 하는 LNG 운반선의 연료가스 공급 장치.The ship propulsion engine is a ME-GI engine, and the power generation engine is a fuel gas supply apparatus of the LNG carrier, characterized in that the DFDE engine. 청구항 1에 있어서,The method according to claim 1, 상기 압력조절수단은 압력조절밸브인 것을 특징으로 하는 LNG 운반선의 연료 가스 공급 장치.Fuel pressure supply device of the LNG carrier, characterized in that the pressure regulating means is a pressure regulating valve. 청구항 3에 있어서,The method according to claim 3, 상기 발전용 연료가스 공급라인의 도중에는 상기 압력조절밸브가 2개 설치된 것을 특징으로 하는 LNG 운반선의 연료가스 공급 장치.The fuel gas supply apparatus of the LNG carrier, characterized in that the two pressure control valves are installed in the middle of the power supply fuel gas supply line. 청구항 1에 있어서,The method according to claim 1, 상기 고압 기화기의 후단의 상기 추진용 연료가스 공급라인의 도중에서 분기되어 상기 발전용 연료가스 공급라인의 도중에 연결된 증발가스 혼합용 연료가스 공급라인과,An evaporative gas mixing fuel gas supply line branched in the middle of the propulsion fuel gas supply line at the rear end of the high pressure vaporizer and connected in the middle of the power generation fuel gas supply line; 상기 증발가스 혼합용 연료가스 공급라인의 도중에 설치된 가스 이젝터와,A gas ejector installed in the middle of the fuel gas supply line for mixing the boil-off gas, 상기 가스 이젝터의 전단의 상기 증발가스 혼합용 연료가스 공급라인에 설치된 압력조절밸브와,A pressure regulating valve installed at the fuel gas supply line for mixing the boil-off gas in front of the gas ejector; 상기 LNG 저장탱크의 상부로부터 상기 가스 이젝터까지 연결된 증발가스 공급라인을 더 포함하는 것을 특징으로 하는 LNG 운반선의 연료가스 공급 장치.Fuel gas supply apparatus of the LNG carrier further comprises a boil-off gas supply line connected from the upper portion of the LNG storage tank to the gas ejector. 청구항 5에 있어서,The method according to claim 5, 상기 증발가스 혼합용 연료가스 공급라인은 상기 추진용 연료가스 공급라인의 도중에서 상기 발전용 연료가스 공급라인과의 분기점 전단으로부터 분기되는 것을 특징으로 하는 LNG 운반선의 연료가스 공급 장치.The fuel gas supply line for the LNG carrier ship characterized in that the boil-off gas mixture fuel gas supply line is branched from the front end of the branch with the power generation fuel gas supply line in the middle of the propulsion fuel gas supply line. 청구항 1에 있어서,The method according to claim 1, 상기 LNG 저장탱크의 내에는 스프레이용 펌프가 설치되고,A spray pump is installed in the LNG storage tank, 상기 추진용 연료가스 공급라인의 일단은 상기 LNG 저장탱크의 내에서 상기 스프레이용 펌프에 연결된 것을 특징으로 하는 LNG 운반선의 연료가스 공급 장치.One end of the propulsion fuel gas supply line fuel gas supply apparatus of the LNG carrier, characterized in that connected to the spray pump in the LNG storage tank. 청구항 7에 있어서,The method according to claim 7, 상기 스프레이용 펌프와 상기 고압 펌프 사이의 상기 추진용 연료가스 공급라인에는 버퍼 탱크(5)가 설치된 것을 특징으로 하는 LNG 운반선의 연료가스 공급 장치.Fuel gas supply device for an LNG carrier, characterized in that a buffer tank (5) is installed in the propulsion fuel gas supply line between the spray pump and the high pressure pump. LNG 저장탱크에 LNG를 적재하여 운반하는 LNG 운반선에서 선박추진용 엔진과 발전용 엔진에 연료가스를 공급하는 방법으로서,As a method of supplying fuel gas to a ship propulsion engine and a power generation engine in an LNG carrier that loads and transports LNG in an LNG storage tank, 상기 LNG 운반선의 LNG 저장탱크로부터 LNG를 빼내어서 고압으로 압축시키고 강제 기화시켜서 상기 선박추진용 엔진에 추진용 연료가스로서 공급하되 상기 고압으로 압축되어 강제 기화된 추진용 연료가스의 일부를 감압시켜 상기 발전용 엔진으로 공급하는 것을 특징으로 하는 LNG 운반선의 연료가스 공급 방법.Extract the LNG from the LNG storage tank of the LNG carrier, compress it to high pressure and forcibly vaporize it, supply it as a fuel gas for propulsion to the ship propulsion engine, but depressurize a part of the fuel gas for compression that is compressed to the high pressure and forcibly vaporized. Fuel gas supply method of the LNG carrier, characterized in that supplied to the engine for power generation. 청구항 9에 있어서,The method according to claim 9, 상기 선박추진용 엔진은 ME-GI 엔진이고, 상기 발전용 엔진은 DFDE 엔진인 것을 특징으로 하는 LNG 운반선의 연료가스 공급 방법.The ship propulsion engine is a ME-GI engine, the power generation engine is a fuel gas supply method of the LNG carrier, characterized in that the DFDE engine. 청구항 9에 있어서,The method according to claim 9, 상기 고압으로 압축되어 강제 기화된 추진용 연료가스의 일부를 감압시킨 후 상기 LNG 저장탱크의 상부로부터 빼내어진 증발가스와 혼합한 후 상기 발전용 엔진으로 분사하여 공급하는 것을 특징으로 하는 LNG 운반선의 연료가스 공급 방법.The fuel of the LNG carrier, which is compressed to a high pressure and pressure-reduced a part of the fuel gas for forced vaporization and mixed with the boil-off gas extracted from the upper portion of the LNG storage tank and injected into the engine for power generation Gas supply method.
KR1020080103550A 2008-10-22 2008-10-22 Fuel gas supply apparatus and method of LKN carrier KR101049229B1 (en)

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