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KR20110012919A - Fuel gas supply system for ships equipped with LNK storage tanks - Google Patents

Fuel gas supply system for ships equipped with LNK storage tanks Download PDF

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Publication number
KR20110012919A
KR20110012919A KR1020090070832A KR20090070832A KR20110012919A KR 20110012919 A KR20110012919 A KR 20110012919A KR 1020090070832 A KR1020090070832 A KR 1020090070832A KR 20090070832 A KR20090070832 A KR 20090070832A KR 20110012919 A KR20110012919 A KR 20110012919A
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South Korea
Prior art keywords
lng
storage tank
lng storage
recondenser
gas
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KR1020090070832A
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Korean (ko)
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송길달
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삼성중공업 주식회사
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Priority to KR1020090070832A priority Critical patent/KR20110012919A/en
Publication of KR20110012919A publication Critical patent/KR20110012919A/en
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    • 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
    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F17C2265/034—Treating the boil-off by recovery with cooling with condensing the gas phase
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

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

Abstract

본 발명은 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치에 관한 것으로서, LNG 저장탱크로부터 LNG 및 증발 가스를 배출시키는 배출부와, 배출부로부터 배출되는 LNG 및 증발 가스를 응축시키는 재응축기와, 재응축기에 의해 응축된 LNG를 추진기에 연료 가스로서 공급하는 연료공급부와, 재응축기에 의해 응축된 LNG를 회수하여 LNG 저장탱크에 저장된 LNG로 분사하는 분사공급부를 포함한다. 따라서, 본 발명은 응축된 LNG를 회수하여 LNG 저장탱크 내의 LNG에 분사시킴으로써 LNG 저장탱크 내의 액체부 및 기체부에 존재하는 열적 성층화를 제거하여 증발 가스의 발생을 억제하고, 이로 인해 LNG의 소모를 줄이며, 증발 가스의 연소에 필요한 장치의 규모 및 설비 비용을 감소시키도록 하는 효과를 가진다.The present invention relates to a fuel gas supply apparatus for a ship having an LNG storage tank, comprising: a discharge unit for discharging LNG and boil-off gas from the LNG storage tank, a recondenser for condensing LNG and boil-off gas discharged from the discharge unit; A fuel supply unit for supplying the LNG condensed by the recondenser as a fuel gas, and an injection supply unit for recovering the LNG condensed by the recondenser and injects the LNG stored in the LNG storage tank. Therefore, the present invention recovers the condensed LNG and injects the LNG in the LNG storage tank to remove the thermal stratification present in the liquid portion and the gas portion in the LNG storage tank to suppress the generation of evaporated gas, thereby reducing the consumption of LNG It has the effect of reducing the size and equipment cost of the apparatus required for the combustion of the boil-off gas.

Description

ＬＮＧ 저장탱크를 구비한 선박의 연료 가스 공급 장치{APPARATUS FOR SUPPLYING FUEL GAS OF A SHIP HAVING LIQUEFIED NATURAL GAS TANK}FUEL GAS TANK WITH A LNK STORAGE TANK {APPARATUS FOR SUPPLYING FUEL GAS OF A SHIP HAVING LIQUEFIED NATURAL GAS TANK}

본 발명은 LNG 저장탱크 내의 증발 가스 발생을 억제하여 LNG의 소모를 줄이는 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치에 관한 것이다.The present invention relates to a fuel gas supply apparatus of a ship having an LNG storage tank to reduce the consumption of LNG by suppressing the generation of evaporated gas in the LNG storage tank.

일반적으로, 액화천연가스(liquefied natural gas, 이하, "LNG"라 함)는 메탄(methane)을 주성분으로 하는 천연가스를 -162℃로 냉각해 그 부피를 6백분의 1로 줄인 무색 투명한 초저온 액체를 말한다. 이러한 LNG가 에너지 자원으로 사용됨에 따라 이 가스를 생산기지로부터 수요지의 인수지까지 대량으로 수송할 수 있는 효율적인 운송 방안이 검토되어 왔으며, 이에 따라 대량의 LNG를 해상으로 수송할 수 있는 LNG 운반선이 개발되었다.In general, liquefied natural gas (hereinafter referred to as "LNG") is a colorless, transparent cryogenic liquid that cools natural gas containing methane as -162 ℃ to reduce its volume to one hundredth. Say. As such LNG is used as an energy resource, an efficient transportation method for transporting this gas in large quantities from the production base to the acquisition site of the demand site has been considered. Accordingly, an LNG carrier capable of transporting a large amount of LNG by sea has been developed. It became.

이와 같은 LNG 운반선은 LNG 저장탱크 내의 압력을 일정한 수준으로 유지하기 위해 자연적으로 증발 가스(boil-off gas, BOG)가 발생하는데, 이러한 증발 가스는 LNG와 함께 DFDE(Dual Fuel Diesel Eelectric propulsion system), ME-GI 엔진(MAN B&W Diesel사 제품), SSD(Slow Speed Diesel) 엔진 등의 연료로 사용된다.Such LNG carriers naturally generate boil-off gas (BOG) to maintain the pressure in the LNG storage tank at a constant level. The boil-off gas, together with the LNG, uses the Dual Fuel Diesel Eelectric propulsion system (DFDE), It is used as fuel for ME-GI engine (man B & W Diesel) and SSD (Slow Speed Diesel) engine.

종래의 LNG 운반선에 마련되는 연료 가스의 공급 장치를 첨부된 도면을 참조하여 설명하면 다음과 같다.Referring to the accompanying drawings, a fuel gas supply apparatus provided in a conventional LNG carrier is as follows.

도 1은 종래의 기술에 따른 LNG 운반선의 연료 가스 공급 장치를 도시한 구성도이다. 도시된 바와 같이, 종래의 기술에 따른 LNG 운반선의 연료 가스 공급 장치는 대한민국 특허청에 특허등록된 제0850833호의 "LNG 운반선의 연료가스 공급 시스템 및 방법"으로서, LNG 공급라인(L1), 증발가스 공급라인(L2), 재응축기(3), 그리고 연료가스 공급라인(L3)을 포함한다.1 is a block diagram showing a fuel gas supply apparatus of the LNG carrier according to the prior art. As shown, the fuel gas supply apparatus of the LNG carrier according to the prior art is "fuel gas supply system and method of the LNG carrier" No. 0850833 patented to the Republic of Korea Patent Office, LNG supply line (L1), evaporation gas supply Line L2, recondenser 3, and fuel gas supply line L3.

LNG 공급라인(L1)은 LNG 공급 펌프(2)에 의해 LNG 저장탱크(1)의 LNG를 재응축기(3)로 공급하도록 한다. The LNG supply line L1 is configured to supply LNG from the LNG storage tank 1 to the recondenser 3 by the LNG supply pump 2.

증발가스 공급라인(L2)은 증발가스용 압축기(6)가 설치되며, 가스 연소기(9)로 증발 가스를 공급하기 위한 소각용 증발가스 공급라인(L5)이 분기된다.The boil-off gas supply line L2 is provided with a boil-off compressor 6, and the boil-off boil-off gas supply line L5 for supplying boil-off gas to the gas combustor 9 is branched.

연료가스 공급라인(L3)은 재응축기(3)에서 발생된 응축된 LNG를 고압으로 압축하여 고압가스 분사엔진(10)으로 공급하도록 고압 펌프(4)가 설치되고, 고압 펌프(4)에 의해 고압으로 압축된 LNG를 기화시켜서 고압가스 분사엔진(10)으로 공급되도록 고압 기화기(5)가 설치되며, 기화된 LNG를 가열시키는 히터(7)가 설치되고, 밸브(11)의 개방에 의해 응축된 LNG를 LNG 저장탱크(1)로 공급하기 위한 응축 LNG 복귀라인(L4)이 분기되어 LNG 저장탱크(1)의 하부까지 연결된다.The fuel gas supply line L3 is provided with a high pressure pump 4 so as to compress the condensed LNG generated in the recondenser 3 to a high pressure and supply it to the high pressure gas injection engine 10, and by the high pressure pump 4. A high pressure vaporizer 5 is installed to vaporize the compressed LNG at high pressure and supply it to the high pressure gas injection engine 10, and a heater 7 for heating the vaporized LNG is installed and condensed by opening the valve 11. The condensed LNG return line L4 for supplying the LNG to the LNG storage tank 1 is branched and connected to the lower portion of the LNG storage tank 1.

상기한 바와 같이, 종래의 기술에 따른 LNG 운반선의 연료 가스 공급 장치는 LNG 저장탱크에서 증발 가스가 계속적으로 발생함으로써 많은 양을 연소시키게 되며, 이로 인해 카고인 LNG의 낭비를 초래하는 문제점을 가지고 있었다.As described above, the fuel gas supply apparatus of the LNG carrier according to the prior art is to burn a large amount by the continuous generation of evaporated gas in the LNG storage tank, thereby causing a problem of waste of cargo LNG. .

이러한 문제점은 LNG 운반선에서 운반의 대상인 LNG가 저장되는 LNG 저장탱크 뿐만 아니라, 선박에서 연료인 LNG가 저장하는 LNG 저장탱크나 그 밖의 선박에 LNG를 저장하기 위하여 마련되는 저장탱크의 증발 가스 처리에도 마찬가지로 적용된다 하겠다.This problem is similar to the LNG storage tank in which LNG is transported in LNG carriers, as well as in the evaporation gas treatment of LNG storage tanks stored in LNG as fuel in ships or storage tanks provided for storing LNG in other vessels. Will apply.

본 발명은 상기한 문제점들을 해결하기 위하여 안출된 것으로서, 증발 가스의 발생을 억제함으로써 연소되는 증발 가스의 양을 감소시키고, 이로 인해 연소기 등과 같은 증발 가스의 처리에 필요한 장치의 규모 및 설비 비용을 줄이도록 한다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and reduces the amount of burnt evaporated gas by suppressing the generation of evaporated gas, thereby reducing the size and equipment cost of a device required for the treatment of evaporated gas such as a combustor. To be.

본 발명에 따른 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치는, LNG 저장탱크를 구비한 선박의 추진기에 연료 가스를 공급하는 장치에 있어서, LNG 저장탱크로부터 LNG 및 증발 가스를 배출시키는 배출부와, 배출부로부터 배출되는 LNG 및 증발 가스를 응축시키는 재응축기와, 재응축기에 의해 응축된 LNG를 추진기에 연료 가스로서 공급하는 연료공급부와, 재응축기에 의해 응축된 LNG를 회수하여 LNG 저장탱크에 저장된 LNG로 분사하는 분사공급부를 포함한다.A fuel gas supply apparatus for a ship having an LNG storage tank according to the present invention is an apparatus for supplying fuel gas to a propeller of a ship having an LNG storage tank, the discharge unit for discharging LNG and evaporated gas from the LNG storage tank And a LNG storage tank recovering the LNG condensed by the recondenser, a recondenser for condensing the LNG and the evaporated gas discharged from the discharge unit, a fuel supply unit supplying the LNG condensed by the recondenser as fuel gas, and a LNG condensed by the recondenser. It includes an injection supply for injecting into the LNG stored in.

본 발명은, 응축된 LNG를 회수하여 LNG 저장탱크 내의 LNG에 분사시킴으로써 LNG 저장탱크 내의 액체부 및 기체부에 존재하는 열적 성층화를 제거하여 증발 가스의 발생을 억제하고, 이로 인해 LNG의 소모를 줄이며, 증발 가스의 연소에 필요 한 장치의 규모 및 설비 비용을 감소시키도록 하는 효과를 가진다.The present invention, by recovering the condensed LNG and injecting the LNG in the LNG storage tank to remove the thermal stratification present in the liquid and gas in the LNG storage tank to suppress the generation of evaporated gas, thereby reducing the consumption of LNG This has the effect of reducing the size and equipment costs of the apparatus required for the combustion of the boil-off gas.

이하, 본 발명의 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다. 아울러 본 발명을 설명함에 있어서, 관련된 공지 구성 또는 기능에 대한 구체적인 설명이 본 발명의 요지를 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

도 2는 본 발명의 일 실시예에 따른 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치를 도시한 구성도이다. 도시된 바와 같이, 본 발명의 일 실시예에 따른 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치(100)는 LNG 저장탱크(210)로부터 추진기(220), 예를 들면 추진력 발생을 위한 DFDE(Dual Fuel Diesel Electric propulsion system), ME-GI 엔진(MAN B&W Diesel사 제품), SSD(Slow Speed Diesel) 엔진 등과 같은 고압가스 분사엔진으로 연료 가스를 공급하는 장치로서, LNG 저장탱크(210)로부터 LNG 및 증발 가스를 배출시키는 배출부(110)와, 배출부(110)로부터 배출되는 LNG 및 증발 가스를 응축시키는 재응축기(120)와, 재응축기(120)에 의해 응축된 LNG를 추진기(220)에 연료 가스로서 공급하는 연료공급부(130)와, 재응축기(120)에 의해 응축된 LNG를 회수하여 LNG 저장탱크(210)에 저장된 LNG로 분사하는 분사공급부(140)를 포함할 수 있다.2 is a block diagram illustrating a fuel gas supply apparatus of a ship having an LNG storage tank according to an embodiment of the present invention. As shown, the fuel gas supply apparatus 100 of the ship having the LNG storage tank according to an embodiment of the present invention is a DFDE (for generating propulsion force), for example, the propulsion force 220 from the LNG storage tank 210 ( A device that supplies fuel gas to a high-pressure gas injection engine such as Dual Fuel Diesel Electric propulsion system), ME-GI engine (manufactured by MAN B & W Diesel), SSD (Slow Speed Diesel) engine, etc. And a discharge unit 110 for discharging the evaporated gas, a recondenser 120 for condensing the LNG and the evaporated gas discharged from the discharge unit 110, and a LNG condensed by the recondenser 120. It may include a fuel supply unit 130 for supplying as a fuel gas to the injection supply unit 140 for recovering the LNG condensed by the recondenser 120 to the LNG stored in the LNG storage tank 210.

본 발명의 일 실시예에 따른 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치(100)는 LNG 운반선에서 운반의 대상인 LNG가 저장되는 LNG 저장탱크 뿐만 아니라, 선박의 연료인 LNG가 저장하는 LNG 저장탱크나 그 밖의 다양한 용도의 LNG 저장탱크를 가지는 모든 선박에 적용될 수 있다. The fuel gas supply apparatus 100 of a ship provided with an LNG storage tank according to an embodiment of the present invention is not only an LNG storage tank in which LNG for transportation is stored in an LNG carrier but also an LNG storage tank storing LNG as a fuel of a ship. Applicable to all vessels with tanks or other various LNG storage tanks.

배출부(110)는 LNG 저장탱크(210)로부터 LNG 및 증발 가스를 배출시키기 위하여, 일례로, LNG 저장탱크(210)의 하부로부터 재응축기(120)까지 연결되는 제 1 배출라인(111)과, 제 1 배출라인(111)의 하단에 설치되어 제 1 배출라인(111)을 통해서 배출되는 LNG가 재응축기(120)에 공급되도록 펌핑력을 제공하는 배출펌프(112)와, LNG 저장탱크(210)의 상부로부터 재응축기(120)까지 연결되는 제 2 배출라인(113)과, 제 2 배출라인(113)에 설치되어 제 2 배출라인(113)을 통해서 배출되는 증발 가스를 압축시키는 압축기(114)를 포함할 수 있다.The discharge unit 110 is, for example, to discharge the LNG and the boil-off gas from the LNG storage tank 210, for example, the first discharge line 111 is connected to the recondenser 120 from the lower portion of the LNG storage tank 210 and And a discharge pump 112 installed at a lower end of the first discharge line 111 to provide a pumping force so that LNG discharged through the first discharge line 111 is supplied to the recondenser 120, and an LNG storage tank ( A second discharge line 113 connected to the recondenser 120 from the top of the 210, and a compressor installed in the second discharge line 113 to compress the evaporated gas discharged through the second discharge line 113 ( 114).

배출부(110)는 LNG 저장탱크(210)로부터 배출되는 증발 가스를 연소기(230)로 공급시키는 연소라인(115)을 더 포함할 수 있다.The discharge unit 110 may further include a combustion line 115 which supplies the boil-off gas discharged from the LNG storage tank 210 to the combustor 230.

연소라인(115)은 일례로 제 2 배출라인(113)으로부터 분기되어 연소기(230)에 연결됨으로써 제 2 배출라인(113)을 통해 배출되는 증발 가스를 연소기(230)에 공급되도록 한다. The combustion line 115 is, for example, branched from the second discharge line 113 to be connected to the combustor 230 so that the boil-off gas discharged through the second discharge line 113 is supplied to the combustor 230.

재응축기(120)는 배출부(110)에 의해 LNG 저장탱크(210)로부터 배출되는 LNG와 증발 가스를 혼합 및 액화시켜서 응축되도록 한다.The recondenser 120 mixes and liquefies the LNG and the evaporated gas discharged from the LNG storage tank 210 by the discharge unit 110 to condense.

연료공급부(130)는 재응축기(120)에 의해 응축된 LNG를 추진기(220)에 연료 가스로서 공급하기 위하여, 일례로 재응축기(120)로부터 배출되는 응축된 LNG를 추진기(220)로 이송되기 위한 경로를 제공하는 공급라인(131)과, 공급라인(131)에 설치되는 고압펌프(132), 고압기화기(133) 및 히터(134)를 포함할 수 있다. 따라서, 재응축기(120)에 의해 응축된 LNG가 고압펌프(132)의 펌핑에 의해 고압으로 압축되 어 공급라인(131)을 따라 이동하여 고압기화기(133)에 의해 기화됨과 아울러 히터(134)에 의해 가열되어 추진기(220)에 공급된다.The fuel supply unit 130 transfers the condensed LNG discharged from the recondenser 120 to the propeller 220, for example, to supply LNG condensed by the recondenser 120 as fuel gas to the propeller 220. It may include a supply line 131 to provide a path for, and a high pressure pump 132, a high pressure vaporizer 133 and a heater 134 installed in the supply line 131. Therefore, the LNG condensed by the recondenser 120 is compressed to high pressure by the pumping of the high pressure pump 132 and moves along the supply line 131 to be vaporized by the high pressure vaporizer 133 and the heater 134. Is heated and supplied to the propeller 220.

분사공급부(140)는 재응축기(120)에 의해 응축된 LNG를 회수하여 LNG 저장탱크(210)로 분사하기 위하여, 일례로 재응축기(120)로부터 응축되어 배출되는 LNG가 LNG 저장탱크(210)로 회수되기 위한 경로를 제공하는 회수라인(141)과, 회수라인(141)에 연결되는 분사관(143)과, 분사관(143)에 설치되는 분사노즐(144)을 포함할 수 있다.The injection supply unit 140 collects LNG condensed by the recondenser 120 and injects the LNG storage tank 210 into, for example, LNG that is condensed and discharged from the recondenser 120 in the LNG storage tank 210. It may include a recovery line 141 to provide a path for the recovery to, the injection pipe 143 connected to the recovery line 141, and the injection nozzle 144 installed in the injection pipe 143.

회수라인(141)은 재응축기(120) 후단의 공급라인(131)으로부터 분기될 수 있고, LNG의 흐름을 개폐시키기 위하여 개폐밸브(142)가 설치될 수 있으며, LNG 저장탱크(210)가 다수로 이루어질 경우 각각의 LNG 저장탱크(210)까지 도달하도록 일측이 다수로 분기될 수 있다.The recovery line 141 may be branched from the supply line 131 at the rear end of the recondenser 120, an opening / closing valve 142 may be installed to open and close the flow of LNG, and the LNG storage tank 210 may be plural. If made of one side can be branched into a plurality to reach each LNG storage tank (210).

분사관(143)은 LNG 저장탱크(210) 내의 상부에 설치되고, LNG 저장탱크(210)가 다수로 이루어지는 경우 회수라인(141)의 분기 끝단마다 연결되도록 다수로 이루어질 수 있으며, LNG 저장탱크(210) 내의 상부 전체에 걸쳐서 배열되도록 다양한 구조를 가질 수 있다.The injection pipe 143 is installed at an upper portion in the LNG storage tank 210, and when the LNG storage tank 210 is formed in plural, the injection pipe 143 may be formed in plural so as to be connected to each branch end of the recovery line 141. It may have a variety of structures to be arranged throughout the upper portion in 210.

분사노즐(144)은 분사관(143)에 다수로 설치될 수 있고, 하방을 향하도록 설치됨으로써 분사관(143)을 통해 공급되는 LNG를 LNG 저장탱크(210) 내에 저장된 LNG를 향하여 하방으로 원활하게 분사하도록 한다.Injection nozzle 144 may be installed in a plurality of injection pipe 143, it is installed to face downwards to smoothly downward the LNG supplied through the injection pipe 143 toward the LNG stored in the LNG storage tank 210 To spray.

한편, 본 발명에 따른 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치(100)는 재응축기(120)에 의해 응축된 LNG를 LNG 저장탱크(210)의 하부로 공급하 는 하부공급부(150)를 더 포함할 수 있다.On the other hand, the fuel gas supply device 100 of the ship having a LNG storage tank according to the present invention is a lower supply unit 150 for supplying the LNG condensed by the recondenser 120 to the lower portion of the LNG storage tank 210 It may further include.

하부공급부(150)는 일례로 재응축기(120) 후단의 공급라인(131)으로부터 분기되어 LNG 저장탱크(210) 내의 하부까지 연장되도록 설치되는 재공급라인(151)과, 재공급라인(151)에 설치되어 회수되는 LNG의 흐름을 개폐시키는 개폐밸브(152)를 포함할 수 있다.The lower supply unit 150 is, for example, a resupply line 151 which is branched from the supply line 131 at the rear end of the recondenser 120 to extend to the lower portion of the LNG storage tank 210, and the resupply line 151. It may include an on-off valve 152 to open and close the flow of the LNG is installed and recovered in.

하부공급부(150)는 응축되어 회수되는 LNG를 분사공급부(140)와 선택적으로 LNG 저장탱크(210)에 공급하는 역할을 수행할 수 있으며, 이와 달리, 분사공급부(140)와 함께 응축되어 회수되는 LNG를 LNG 저장탱크(210)로 공급하는 역할을 수행할 수 있다.The lower supply unit 150 may serve to supply LNG, which is condensed and recovered, to the injection supply unit 140 and the LNG storage tank 210 selectively. Alternatively, the lower supply unit 150 may condense and recover the LNG that is condensed together with the injection supply unit 140. It may serve to supply LNG to the LNG storage tank 210.

이와 같은 구성을 가지는 본 발명에 따른 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치의 작동을 예로 들어 설명하면 다음과 같다.Referring to the operation of the fuel gas supply device of a ship having an LNG storage tank according to the present invention having such a configuration as an example.

LNG 저장탱크(210)로부터 LNG가 배출펌프(112)의 펌핑에 의해 제 1 배출라인(111)을 따라 재응축기(120)로 공급됨과 아울러 증발 가스가 압축기(114)에 의해 압축되어 제 2 배출라인(113)을 따라 재응축기(120)로 공급됨으로써 재응축기(120)에 의해 LNG와 증발 가스가 서로 혼합 및 응축되어 공급라인(131)으로 공급된다.LNG is supplied from the LNG storage tank 210 to the recondenser 120 along the first discharge line 111 by the pumping of the discharge pump 112 and the boil-off gas is compressed by the compressor 114 to discharge the second discharge. By supplying the recondenser 120 along the line 113, the LNG and the boil-off gas are mixed and condensed with each other by the recondenser 120 and supplied to the supply line 131.

한편, LNG 저장탱크(210)로부터 제 2 배출라인(113)을 통해 배출되는 증발 가스의 일부는 연소라인(115)을 따라 연소기(230)로 이동하여 연소된다.Meanwhile, a part of the boil-off gas discharged from the LNG storage tank 210 through the second discharge line 113 is moved to the combustor 230 along the combustion line 115 and combusted.

공급라인(131)으로 공급되는 응축된 LNG는 고압펌프(132)의 펌핑에 의해 선박의 추진력을 발생시키는 추진기(220)로 공급되는데, 이 때, 고압기화기(133) 및 히터(134)에 의해 기화 및 가열되어 추진기(220)로 공급되어 연료로서 사용된다.The condensed LNG supplied to the supply line 131 is supplied to the propeller 220 generating the propulsion force of the ship by the pumping of the high pressure pump 132, at this time, by the high pressure vaporizer 133 and the heater 134. It is vaporized and heated and supplied to the propeller 220 to be used as fuel.

재응축기(120)에서 응축되어 배출되는 LNG는 개폐밸브(142)의 개방에 의해 회수라인(141) 및 분사관(143)을 따라 이동하여 분사노즐(144)에 의해 LNG 저장탱크(210)에 저장된 LNG로 분사되고, 이로 인해 LNG 저장탱크(210) 내부의 액체부 및 기체부에 존재하는 열적 성층화를 제거함으로써 증발 가스의 발생을 억제하여 불필요하게 연소로 인해 소모되는 증발 가스의 양을 감소시켜서 LNG의 낭비를 최소화하며, 증발 가스의 연소에 필요한 장치의 규모 및 설비 비용을 절약하도록 한다.LNG condensed and discharged from the recondenser 120 is moved along the recovery line 141 and the injection pipe 143 by the opening and closing of the valve 142 to the LNG storage tank 210 by the injection nozzle 144. It is injected into the stored LNG, thereby removing the thermal stratification present in the liquid portion and the gas portion in the LNG storage tank 210 to suppress the generation of evaporated gas to reduce the amount of evaporated gas consumed unnecessarily due to combustion It minimizes the waste of LNG and saves the size and equipment cost of the equipment required for the combustion of boil-off gas.

한편, 하부공급부(150)의 개폐밸브(152)의 개방에 의해 재응축기(120)에 의해 응축되어 배출되는 LNG가 재공급라인(151)을 통해 LNG 저장탱크(210)의 하부로 공급되며, 이는 분사공급부(140)와 함께 또는 선택적으로 응축된 LNG를 LNG 저장탱크(210)로 공급되도록 할 수 있다.Meanwhile, LNG condensed and discharged by the recondenser 120 by the opening and closing valve 152 of the lower supply unit 150 is supplied to the lower portion of the LNG storage tank 210 through the resupply line 151. This may be supplied to the LNG storage tank 210 with the injection supply unit 140 or optionally condensed LNG.

이상과 같은 본 발명의 실시예에 따르면, 응축된 LNG를 회수하여 LNG 저장탱크 내의 LNG에 분사시킴으로써 LNG 저장탱크 내의 액체부 및 기체부에 존재하는 열적 성층화를 제거하여 증발 가스의 발생을 억제하고, 이로 인해 LNG의 소모를 줄이며, 증발 가스의 연소에 필요한 장치의 규모 및 설비 비용을 감소시키도록 한다.According to the embodiment of the present invention as described above, by collecting the condensed LNG and injecting the LNG in the LNG storage tank to remove the thermal stratification present in the liquid portion and the gas portion in the LNG storage tank to suppress the generation of evaporated gas, This reduces the consumption of LNG and reduces the size and equipment costs of the equipment required for the combustion of the boil-off gas.

이상에서와 같이, 본 발명의 상세한 설명에서 구체적인 실시예에 관해 설명하였으나, 본 발명의 기술이 당업자에 의하여 용이하게 변형 실시될 가능성이 자명하며, 이러한 변형된 실시예들은 본 발명의 특허청구범위에 기재된 기술사상에 포함된다할 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. And will be included in the described technical idea.

도 1은 종래의 기술에 따른 LNG 운반선의 연료 가스 공급 장치를 도시한 구성도이고,1 is a block diagram showing a fuel gas supply apparatus of the LNG carrier according to the prior art,

도 2는 본 발명의 일 실시예에 따른 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치를 도시한 구성도이다.2 is a block diagram illustrating a fuel gas supply apparatus of a ship having an LNG storage tank according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

110 : 배출부 111 : 제 1 배출라인110: discharge part 111: first discharge line

112 : 배출펌프 113 : 제 2 배출라인112: discharge pump 113: second discharge line

114 : 압축기 115 : 연소라인114: compressor 115: combustion line

120 : 재응축기 130 : 연료공급부120: recondenser 130: fuel supply unit

131 : 공급라인 132 : 고압펌프131: supply line 132: high pressure pump

133 : 고압기화기 134 : 히터133: high pressure vaporizer 134: heater

140 : 분사공급부 141 : 회수라인140: injection supply unit 141: recovery line

142 : 개폐밸브 143 : 분사관142: on-off valve 143: injection pipe

144 : 분사노즐 150 : 하부공급부144: injection nozzle 150: lower supply unit

151 : 재공급라인 152 : 개폐밸브151: resupply line 152: on-off valve

210 : LNG 저장탱크 220 : 추진기210: LNG storage tank 220: propeller

230 : 연소기230: burner

Claims (4)

LNG 저장탱크를 구비한 선박의 추진기에 연료 가스를 공급하는 장치에 있어서,An apparatus for supplying fuel gas to a propeller of a ship having an LNG storage tank, 상기 LNG 저장탱크로부터 LNG 및 증발 가스를 배출시키는 배출부와,A discharge part for discharging LNG and evaporated gas from the LNG storage tank; 상기 배출부로부터 배출되는 LNG 및 증발 가스를 응축시키는 재응축기와,A recondenser for condensing LNG and boil-off gas discharged from the discharge unit; 상기 재응축기에 의해 응축된 LNG를 상기 추진기에 연료 가스로서 공급하는 연료공급부와,A fuel supply unit supplying the LNG condensed by the recondenser to the propeller as fuel gas; 상기 재응축기에 의해 응축된 LNG를 회수하여 상기 LNG 저장탱크에 저장된 LNG로 분사하는 분사공급부Injection supply unit for recovering the LNG condensed by the recondenser to inject into the LNG stored in the LNG storage tank 를 포함하는 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치.Fuel gas supply apparatus of a ship having an LNG storage tank comprising a. 제 1 항에 있어서,The method of claim 1, 상기 배출부는,The discharge portion, 상기 LNG 저장탱크로부터 배출되는 증발 가스를 연소기에 공급하는 연소라인Combustion line for supplying boil-off gas discharged from the LNG storage tank to the combustor 을 더 포함하는 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치.Fuel gas supply device of a ship having an LNG storage tank further comprising. 제 1 항에 있어서,The method of claim 1, 상기 분사공급부는,The injection supply unit, 상기 재응축기로부터 응축되는 LNG가 상기 LNG 저장탱크로 회수되기 위한 경로를 제공하며, LNG의 흐름을 개폐시키는 개폐밸브가 설치되는 회수라인과,A recovery line providing a path for the LNG condensed from the recondenser to be recovered to the LNG storage tank, and having an on / off valve for opening and closing the flow of LNG; 상기 회수라인에 연결되며, 상기 LNG 저장탱크 내의 상부에 설치되는 분사관과,An injection pipe connected to the recovery line and installed in an upper portion of the LNG storage tank; 상기 분사관에 설치되며, 상기 분사관을 통해 공급되는 LNG를 하방으로 분사하는 분사노즐An injection nozzle installed in the injection pipe and spraying LNG supplied through the injection pipe downward; 을 포함하는 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치.Fuel gas supply apparatus of a ship having an LNG storage tank comprising a. 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,4. The method according to any one of claims 1 to 3, 상기 재응축기에 의해 응축된 LNG를 상기 LNG 저장탱크의 하부로 공급하는 하부공급부Lower supply unit for supplying the LNG condensed by the recondenser to the lower portion of the LNG storage tank 를 더 포함하는 LNG 저장탱크를 구비한 선박의 연료 가스 공급 장치.Fuel gas supply device of a ship having an LNG storage tank further comprising.
KR1020090070832A 2009-07-31 2009-07-31 Fuel gas supply system for ships equipped with LNK storage tanks Ceased KR20110012919A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150051189A (en) * 2014-12-29 2015-05-11 현대중공업 주식회사 A Liquefied Gas Treatment System
CN104955727A (en) * 2013-02-22 2015-09-30 三菱重工业株式会社 Natural gas fuel evaporator, natural gas fuel supply device, and method for supplying natural gas fuel to ships and motors
KR20150120729A (en) * 2014-04-18 2015-10-28 삼성중공업 주식회사 System For Reducing Volatile Organic Compound
KR20200002564A (en) * 2018-06-29 2020-01-08 한국조선해양 주식회사 liquefied gas tank, fuel gas supply system, and ship having the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104955727A (en) * 2013-02-22 2015-09-30 三菱重工业株式会社 Natural gas fuel evaporator, natural gas fuel supply device, and method for supplying natural gas fuel to ships and motors
KR20150120729A (en) * 2014-04-18 2015-10-28 삼성중공업 주식회사 System For Reducing Volatile Organic Compound
KR20150051189A (en) * 2014-12-29 2015-05-11 현대중공업 주식회사 A Liquefied Gas Treatment System
KR20200002564A (en) * 2018-06-29 2020-01-08 한국조선해양 주식회사 liquefied gas tank, fuel gas supply system, and ship having the same
KR20200002560A (en) * 2018-06-29 2020-01-08 한국조선해양 주식회사 liquefied gas tank, fuel gas supply system, and ship having the same
KR20200002565A (en) * 2018-06-29 2020-01-08 한국조선해양 주식회사 liquefied gas tank, fuel gas supply system, and ship having the same

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