KR20160068178A - Fuel supply system - Google Patents

Fuel supply system Download PDF

Info

Publication number
KR20160068178A
KR20160068178A KR1020140173548A KR20140173548A KR20160068178A KR 20160068178 A KR20160068178 A KR 20160068178A KR 1020140173548 A KR1020140173548 A KR 1020140173548A KR 20140173548 A KR20140173548 A KR 20140173548A KR 20160068178 A KR20160068178 A KR 20160068178A
Authority
KR
South Korea
Prior art keywords
nitrogen
tank
gas
liquefied gas
fuel supply
Prior art date
Application number
KR1020140173548A
Other languages
Korean (ko)
Other versions
KR102173909B1 (en
Inventor
조민규
문성재
유호연
전춘식
정일웅
조정관
최병윤
최성훈
Original Assignee
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to KR1020140173548A priority Critical patent/KR102173909B1/en
Publication of KR20160068178A publication Critical patent/KR20160068178A/en
Application granted granted Critical
Publication of KR102173909B1 publication Critical patent/KR102173909B1/en

Links

Images

Classifications

    • 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
    • F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
    • F02M21/0224—Secondary gaseous fuel storages
    • 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
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F25J1/0025—Boil-off gases "BOG" from storages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/007—Primary atmospheric gases, mixtures thereof
    • F25J1/0072—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0204—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0229—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock
    • F25J1/023—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock for the combustion as fuels, i.e. integration with the fuel gas system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0251—Intermittent or alternating process, so-called batch process, e.g. "peak-shaving"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0292—Refrigerant compression by cold or cryogenic suction of the refrigerant gas
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0369—Localisation of heat exchange in or on a vessel
    • F17C2227/0374—Localisation of heat exchange in or on a vessel in the liquid
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/08—Cold compressor, i.e. suction of the gas at cryogenic temperature and generally without afterstage-cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/60—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being (a mixture of) hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/34—Details about subcooling of liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank

Abstract

Disclosed is a fuel supply system. The fuel supply system can improve liquefaction efficiency by liquefying evaporation gas generated in a storage tank using liquefied gas and liquid nitrogen. According to an embodiment of the present invention, the fuel supply system includes: a storage tank storing the liquefied gas; an auxiliary tank receiving the liquefied gas from the storage tank and storing the liquefied gas; a fuel supply line treating the liquefied gas stored in the auxiliary tank and supplying the treated liquefied gas to an engine; a nitrogen tank storing the liquid nitrogen; a reliquefaction line liquefying the evaporation gas of the storage tank by heat-exchanging with a heat exchanger and the liquefied gas in the auxiliary tank and returning the liquefied evaporation gas to the storage tank; and a nitrogen circulation line heat-exchanging the liquid nitrogen of the nitrogen tank with the heat exchanger and the liquefied gas in the auxiliary tank and returning the heat-exchanged liquid nitrogen to the nitrogen tank.

Description

연료공급시스템{FUEL SUPPLY SYSTEM}[0001] FUEL SUPPLY SYSTEM [0002]

본 발명은 저장탱크에서 발생하는 증발가스를 질소탱크의 액체질소를 이용하여 재액화할 수 있는 연료공급시스템에 관한 것이다.The present invention relates to a fuel supply system capable of re-liquefying evaporative gas generated in a storage tank using liquid nitrogen in a nitrogen tank.

액화천연가스(LNG) 운반선 또는 액화가스 추진선박은 액화가스 연료 또는 액화화물을 저장하는 저장탱크에서 증발가스가 발생하기 때문에 이 증발가스를 재액화하기 위한 재액화장치를 갖추고 있다.A liquefied natural gas (LNG) carrier or a liquefied gas propulsion ship is equipped with a liquefaction device for liquefying the evaporated gas since the evaporative gas is generated in a storage tank storing liquefied gas fuel or liquefied gas.

대한민국 공개특허공보 10-2008-0104110호(2008. 12. 01. 공개)에 개시된 선박의 연료가스 공급시스템은 증발가스를 재액화시키는 재액화장치의 예를 제시한 바 있다. 이 재액화장치는 저장탱크에서 발생하는 증발가스를 압축기로 압축한 상태에서 저장탱크로부터 엔진으로 공급 중인 액화가스와 열교환시켜 액화하는 방식이다.A fuel gas supply system for a ship disclosed in Korean Patent Laid-Open Publication No. 10-2008-0104110 (published on Dec. 01, 2008) has provided an example of a re-liquefying apparatus for re-liquefying evaporated gas. This liquefaction apparatus is a system in which liquefied gas is heat-exchanged with a liquefied gas supplied from a storage tank to an engine while the evaporation gas generated in a storage tank is compressed by a compressor.

그러나 이러한 재액화장치는 연료로 공급 중인 액화가스와 열교환을 통해 증발가스의 액화를 구현하는 방식이기 때문에 액화효율을 높이는데 한계가 있었다.However, such a liquefaction device has a limitation in heightening liquefaction efficiency because it is a method of implementing liquefaction of evaporated gas through heat exchange with liquefied gas being supplied as fuel.

대한민국 공개특허공보 10-2008-0104110호(2008. 12. 01. 공개)Korean Patent Publication No. 10-2008-0104110 (published Dec. 01, 2008)

본 발명의 실시 예는 저장탱크에서 발생하는 증발가스를 액화가스와 액체질소를 이용해 액화함으로써 액화효율을 높일 수 있는 연료공급시스템을 제공하고자 한다.An embodiment of the present invention is to provide a fuel supply system capable of increasing liquefaction efficiency by liquefying evaporative gas generated from a storage tank using liquefied gas and liquid nitrogen.

본 발명의 실시 예는 질소탱크의 질소가스를 재액화하여 이용함과 동시에 질소가스로 연료계통의 퍼징을 수행할 수 있는 연료공급시스템을 제공하고자 한다. An embodiment of the present invention is to provide a fuel supply system capable of re-liquefying and using nitrogen gas in a nitrogen tank and purifying the fuel system with nitrogen gas.

본 발명의 일 측면에 따르면, 액화가스를 저장하는 저장탱크; 상기 저장탱크로부터 액화가스를 공급받아 저장하는 보조탱크; 상기 보조탱크에 저장된 액화가스를 처리하여 엔진으로 공급하는 연료공급라인; 액체질소를 저장하는 질소탱크; 상기 저장탱크의 증발가스를 상기 보조탱크 내부의 액화가스 및 열교환기와 열교환을 통해 액화시킨 후 상기 저장탱크로 복귀시키는 재액화라인; 및 상기 질소탱크의 액체질소를 상기 열교환기 및 상기 보조탱크 내부의 액화가스와 열교환 후에 상기 질소탱크로 복귀시키는 질소순환라인을 포함하는 연료공급시스템이 제공될 수 있다.According to an aspect of the present invention, there is provided a storage tank for storing liquefied gas; An auxiliary tank for receiving and storing liquefied gas from the storage tank; A fuel supply line which processes the liquefied gas stored in the auxiliary tank and supplies it to the engine; A nitrogen tank for storing liquid nitrogen; A re-liquefaction line for liquefying the evaporation gas of the storage tank through heat exchange with a liquefied gas and a heat exchanger in the auxiliary tank and returning the liquefied gas to the storage tank; And a nitrogen circulation line for returning the liquid nitrogen of the nitrogen tank to the nitrogen tank after heat exchange with the liquefied gas inside the heat exchanger and the auxiliary tank.

상기 재액화라인은 상기 보조탱크 내부의 액화가스에 잠긴상태로 설치되는 열교환부를 포함할 수 있다.And the re-liquefaction line may include a heat exchanger installed in a state of being submerged in liquefied gas in the auxiliary tank.

상기 질소순환라인은 상기 질소탱크 내부의 액체질소를 압송하는 질소펌프와, 상기 열교환기 및 상기 보조탱크를 거쳐 상기 질소탱크로 복귀하는 질소가스를 감압 팽창시키는 팽창장치를 포함할 수 있다.The nitrogen circulation line may include a nitrogen pump that pressurizes liquid nitrogen in the nitrogen tank and an expansion device that decompressively expands the nitrogen gas returned to the nitrogen tank through the heat exchanger and the auxiliary tank.

상기 질소순환라인은 상기 보조탱크 내부의 액화가스에 잠긴상태로 설치되는 열교환부와, 상기 질소탱크 내부의 액체질소에 잠긴상태로 설치되는 스파이럴형 열교환부를 포함할 수 있다.The nitrogen circulation line may include a heat exchange unit installed in a state of being submerged in liquefied gas in the auxiliary tank, and a spiral heat exchange unit installed in a state of being submerged in liquid nitrogen in the nitrogen tank.

상기 연료공급시스템은 상기 질소탱크의 질소가스를 압축기에서 압축한 후 상기 열교환기에서 열교환시키고, 팽창장치에서 액화한 후 상기 질소탱크로 복귀시키는 질소액화라인을 더 포함할 수 있다.The fuel supply system may further include a nitrogen liquefaction line for compressing the nitrogen gas in the nitrogen tank in the compressor, heat-exchanging the heat in the heat exchanger, liquefying it in the expansion device, and returning the nitrogen gas to the nitrogen tank.

상기 연료공급시스템은 상기 질소탱크의 질소가스를 압축기에서 압축한 후 상기 보조탱크 내부의 액화가스와 열교환시키고, 팽창장치에서 액화한 후 상기 질소탱크로 복귀시키는 질소액화라인을 더 포함할 수 있다.The fuel supply system may further include a nitrogen liquefaction line for compressing the nitrogen gas in the nitrogen tank in the compressor, then performing heat exchange with the liquefied gas in the auxiliary tank, liquefying the liquefied gas in the expansion tank, and returning the liquefied gas to the nitrogen tank.

상기 질소액화라인은 상기 압축기에서 압축된 질소가스를 상기 연료공급라인 외측을 포위하는 겹층배관 내부를 통과시켜 상기 겹층배관의 퍼징(Purging)을 수행할 수 있다. The nitrogen liquefaction line may perform purging of the double layer pipe by passing nitrogen gas compressed in the compressor through the inside of the double layer pipe enclosing the outside of the fuel supply line.

본 발명의 실시 예에 따른 연료공급시스템은 저장탱크에서 발생하는 증발가스를 보조탱크 내부의 액화가스를 이용해 냉각시킨 후 열교환기에서 질소탱크로부터 공급된 액체질소를 이용해 액화할 수 있기 때문에 증발가스의 액화효율을 높일 수 있다. Since the fuel supply system according to the embodiment of the present invention can cool liquefied gas generated in the storage tank using the liquefied gas in the auxiliary tank and then liquefy using the liquid nitrogen supplied from the nitrogen tank in the heat exchanger, The liquefaction efficiency can be increased.

본 발명의 실시 예에 따른 연료공급시스템은 질소탱크의 질소가스를 질소액화라인을 통해 재액화시킬 수 있기 때문에 질소의 보충이 없이도 증발가스의 연속적인 재액화를 수행할 수 있다.The fuel supply system according to the embodiment of the present invention can perform the continuous re-liquefaction of the evaporated gas without supplementing nitrogen because the nitrogen gas in the nitrogen tank can be resuspended through the nitrogen liquefaction line.

본 발명의 실시 예에 따른 연료공급시스템은 질소가스를 액화시키는 과정에서 질소액화라인의 질소가스가 엔진 연료계통의 겹층배관을 통과하도록 하기 때문에 질소가스의 액화과정에서 연료계통 겹층배관의 퍼징을 수행할 수 있다.The fuel supply system according to the embodiment of the present invention performs purging of the fuel system overlapped pipe in the liquefaction process of the nitrogen gas since the nitrogen gas of the nitrogen liquefaction line passes through the double layer pipe of the engine fuel system in the process of liquefying the nitrogen gas can do.

도 1은 본 발명의 제1실시 예에 따른 연료공급시스템을 나타낸다.
도 2는 본 발명의 제2실시 예에 따른 연료공급시스템을 나타낸다.1 shows a fuel supply system according to a first embodiment of the present invention.
2 shows a fuel supply system according to a second embodiment of the present invention.

이하에서는 본 발명의 실시 예를 첨부 도면을 참조하여 상세히 설명한다. 이하의 실시 예는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상을 충분히 전달하기 위해 제시하는 것이다. 본 발명은 여기서 제시한 실시 예만으로 한정되지 않고 다른 형태로 구체화될 수도 있다. 도면은 본 발명을 명확히 하기 위해 설명과 관계 없는 부분의 도시를 생략하고, 이해를 돕기 위해 구성요소의 크기를 다소 과장하여 표현할 수 있다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

도 1은 본 발명의 제1실시 예에 연료공급시스템을 나타낸다. 도시한 바와 같이, 액화가스 추진선박이나 액화가스 운송선의 연료계통은 액화가스를 저장하는 저장탱크(1)와, 저장탱크(1)로부터 액화가스를 공급받아 저장하며 저장탱크(1)보다 높은 압력을 유지하는 보조탱크(2)를 구비한다.1 shows a fuel supply system according to a first embodiment of the present invention. As shown in the figure, a fuel system of a liquefied gas propulsion vessel or a liquefied gas transportation line includes a storage tank 1 for storing liquefied gas, a storage tank 1 for storing and storing liquefied gas, And an auxiliary tank (2) for holding the auxiliary tank (2).

또 이 연료계통은 저장탱크(1)의 액화가스를 보조탱크(2)로 공급하기 위한 제1연료공급라인(10)과, 보조탱크(2)에 저장된 액화가스를 처리하여 고압가스엔진(3)으로 공급하기 위한 제2연료공급라인(20)과, 저장탱크(1)의 증발가스를 고압가스엔진(3)의 공급조건으로 압축하여 고압가스엔진(3)으로 공급하기 위한 제3연료공급라인(30), 제3연료공급라인(30)으로부터 분기되며 상대적으로 낮은 압력으로 압축된 증발가스를 저압가스엔진(4)으로 공급하기 위한 제4연료공급라인(40), 제1연료공급라인(10)으로부터 분기되며 액화가스를 처리하여 저압가스엔진(4)으로 공급하기 위한 제5연료공급라인(50), 그리고 외부로부터 저장탱크(10)로 액화가스를 공급하기 위한 벙커링라인(60)을 포함할 수 있다.The fuel system further includes a first fuel supply line 10 for supplying the liquefied gas of the storage tank 1 to the auxiliary tank 2 and a second fuel supply line 10 for processing the liquefied gas stored in the auxiliary tank 2, A second fuel supply line 20 for supplying the third fuel supply line 20 to the high pressure gas engine 3 by compressing the evaporation gas of the storage tank 1 under the supply conditions of the high pressure gas engine 3, A fourth fuel supply line 40 for supplying the evaporated gas branched from the third fuel supply line 30 and compressed to a relatively low pressure to the low pressure gas engine 4, A fifth fuel supply line 50 branched from the first fuel supply line 10 for supplying liquefied gas to the low pressure gas engine 4 and a bunkering line 60 for supplying liquefied gas from the outside to the storage tank 10, . ≪ / RTI >

저장탱크(1)에 저장되는 액화가스는 액화상태로 저장할 수 있는 LNG, LPG, DME(Dimethylether), 에탄(Ethane) 중 어느 하나일 수 있으나 이에 한정되는 것은 아니다. 저장탱크(1)는 단열상태를 유지하면서 연료를 액화상태로 저장하는 탱크다. 예를 들어, 저장탱크(1)는 액화가스가 LNG일 경우 내부압력이 1bar를 유지하거나 연료공급조건을 고려해 그보다 높은 압력으로 유지할 수 있고, 액화상태 유지를 위해 내부온도가 -163도 정도를 유지할 수 있다. The liquefied gas stored in the storage tank 1 may be any one of LNG, LPG, DME (Dimethylether) and Ethane which can be stored in a liquefied state, but is not limited thereto. The storage tank 1 is a tank for storing the fuel in a liquefied state while maintaining an adiabatic state. For example, the storage tank 1 can maintain an internal pressure of 1 bar when the liquefied gas is LNG or maintain it at a higher pressure in view of the fuel supply conditions, and maintain an internal temperature of about -163 degrees .

저압가스엔진(4)은 대략 5 ~ 6bar의 연료가스를 공급받는 엔진 일 수 있고, 고압가스엔진(3)은 대략 300~400bar의 연료가스를 공급받는 엔진일 수 있다. 물론, 엔진들(3,4)은 다양한 방식이 채용될 수 있을 것이므로 엔진들의 형태가 이에 한정되는 것은 아니다. The low-pressure gas engine 4 may be an engine supplied with fuel gas of approximately 5 to 6 bar, and the high-pressure gas engine 3 may be an engine supplied with fuel gas of approximately 300 to 400 bar. Of course, the types of the engines are not limited thereto, as the engines 3 and 4 may be employed in various ways.

제1연료공급라인(10)은 저장탱크(1) 내부로부터 보조탱크(2) 내부로 연장되어 액화가스를 공급할 수 있는 배관으로 구성될 수 있고, 저장탱크(1)의 바닥과 근접하는 제1연료공급라인(10)의 입구에는 상대적으로 압력이 높은 보조탱크(2)로 액화가스를 압송할 수 있는 펌프(11)가 설치된다.The first fuel supply line 10 may be a pipe extending from the interior of the storage tank 1 to the interior of the auxiliary tank 2 and capable of supplying liquefied gas, At the inlet of the fuel supply line 10, there is installed a pump 11 capable of feeding the liquefied gas to the auxiliary tank 2 having a relatively high pressure.

보조탱크(2)는 국제해사기구(IMO, International Maritime Organization)의 분류에 따른 압력식 C형 탱크일 수 있다. 여기서는 일 예로써 보조탱크(2)로 C형 탱크가 채용된 경우를 제시하고 있지만, 보조탱크(2)의 형태가 이에 한정되는 것은 아니다. The auxiliary tank (2) may be a pressure type C tank according to the International Maritime Organization (IMO) classification. Here, as an example, the case where the C tank is employed as the auxiliary tank 2 is shown, but the form of the auxiliary tank 2 is not limited thereto.

제2연료공급라인(20)에는 보조탱크(2)에 저장된 액화가스를 고압가스엔진(3)의 공급압력으로 압축해 송출하는 고압펌프(21)와, 고압펌프(21)로부터 송출된 고압의 액화가스를 기화하여 고압가스엔진(3) 쪽으로 보내는 고압기화기(22)가 설치된다. 고압기화기(22)로부터 고압가스엔진(3) 쪽으로 공급되는 연료가스는 고압가스엔진(3)의 공급조건(압력, 온도)에 부합하도록 조절될 수 있다. 이를 위해 도면에 나타내지는 않았지만, 고압기화기(22)와 고압가스엔진(3) 사이에는 가열 등을 통해 온도를 조절할 수 있는 수단과, 버퍼탱크나 압력조절용 밸브처럼 압력을 조절할 수 있는 수단이 마련될 수 있다.The second fuel supply line 20 is provided with a high pressure pump 21 for compressing and discharging the liquefied gas stored in the auxiliary tank 2 to the supply pressure of the high pressure gas engine 3, A high-pressure vaporizer 22 for vaporizing the liquefied gas and sending it to the high-pressure gas engine 3 is provided. The fuel gas supplied from the high-pressure vaporizer 22 to the high-pressure gas engine 3 can be adjusted to match the supply conditions (pressure, temperature) of the high-pressure gas engine 3. Although not shown in the drawing, a means for adjusting the temperature through heating or the like and a means for adjusting the pressure such as a buffer tank or a pressure adjusting valve are provided between the high-pressure vaporizer 22 and the high-pressure gas engine 3 .

제3연료공급라인(30)에는 다단 압축기(31)가 설치된다. 따라서 저장탱크(1)에서 발생한 증발가스를 고압가스엔진(3)의 공급조건에 부압하도록 가압한 상태에서 고압가스엔진(3)으로 공급함으로써 저장탱크(1)의 증발가스를 고압가스엔진(3)의 연료로 이용할 수 있다. 도면에 나타내지는 않았지만, 제3연료공급라인(30)에도 공급되는 연료가스의 온도조절을 위한 열교환기 등이 설치될 수 있다.A multi-stage compressor (31) is installed in the third fuel supply line (30). Therefore, the evaporated gas generated from the storage tank 1 is supplied to the high-pressure gas engine 3 while being pressurized so as to be negative pressure to the supply condition of the high-pressure gas engine 3, ). ≪ / RTI > Although not shown, a heat exchanger for controlling the temperature of the fuel gas supplied to the third fuel supply line 30 may also be provided.

제4연료공급라인(40)은 저장탱크(1)의 증발가스를 저압가스엔진(4)의 공급압력으로 압축한 상태에서 저압가스엔진(4)으로 공급할 수 있도록 다단 압축기(31)의 중간단계에서 분기되어 저압가스엔진(4)에 연결된다. 제4연료공급라인(40)에는 저압가스엔진(4)으로 공급되는 연료가스의 온도조절을 위한 열교환기(41)가 설치될 수 있다.The fourth fuel supply line 40 is connected to the low pressure gas engine 4 so that the evaporation gas of the storage tank 1 can be supplied to the low pressure gas engine 4 while being compressed by the supply pressure of the low pressure gas engine 4. [ And is connected to the low-pressure gas engine 4. The fourth fuel supply line 40 may be provided with a heat exchanger 41 for regulating the temperature of the fuel gas supplied to the low-pressure gas engine 4.

제5연료공급라인(50)은 제1연료공급라인(10)으로부터 분기되어 저압가스엔진(4)으로 연결된다. 제5연료공급라인(50)에는 제1연료공급라인(10)의 액화가스를 기화하기 위한 기화기(51)와, 기화된 연료가스를 저압가스엔진(4)의 공급조건에 부합하도록 열교환하는 열교환기(52)가 설치될 수 있다.The fifth fuel supply line 50 branches from the first fuel supply line 10 and is connected to the low-pressure gas engine 4. The fifth fuel supply line 50 is provided with a vaporizer 51 for vaporizing the liquefied gas of the first fuel supply line 10 and a heat exchanger 51 for exchanging the vaporized fuel gas with the supply conditions of the low- A base 52 may be provided.

이처럼 제1실시 예에 따른 액화가스 추진선박의 연료계통은 저장탱크(1)에서 발생하는 증발가스를 처리하여 고압가스엔진(3)이나 저압가스엔진(4)의 연료로 이용할 수 있다. 또 저장탱크(1)의 증발가스 양이 연료로 이용하기에 부족할 경우에는 저장탱크(1)의 액화가스를 처리하여 역시 고압가스엔진(3)이나 저압가스엔진(4)의 연료로 이용할 수 있다.As such, the fuel system of the liquefied gas propulsion vessel according to the first embodiment can treat the evaporated gas generated in the storage tank 1 and use it as fuel for the high-pressure gas engine 3 or the low-pressure gas engine 4. When the amount of evaporated gas in the storage tank 1 is insufficient for use as fuel, the liquefied gas in the storage tank 1 can be treated as fuel for the high-pressure gas engine 3 or the low-pressure gas engine 4 .

벙커링라인(60)은 선박에 마련된 벙커링스테이션으로부터 저장탱크(1)까지 연장된다. 벙커링라인(60)은 저장탱크(1)와 연결되면서 제1관(61)과 제2관(62)으로 분기될 수 있다. 제1관(61)은 저장탱크(1) 내부 하측으로 연장되고, 제2관(62)은 저장탱크(1) 내측 상부에 마련되는 분사헤드(63)에 연결될 수 있다. 제2관(62) 및 분사헤드(63)를 통해 샤워방식으로 공급되는 액화가스가 저장탱크(1) 내측 상부의 증발가스를 액화시키는 효과를 발휘하여 저장탱크(1)로 연료를 공급하는 과정에서 발생하는 증발가스를 줄일 수 있다. The bunkering line 60 extends from the bunkering station provided on the vessel to the storage tank 1. The bunkering line 60 may be branched into the first pipe 61 and the second pipe 62 while being connected to the storage tank 1. The first pipe 61 extends to the lower side of the storage tank 1 and the second pipe 62 is connected to the injection head 63 provided on the upper inside of the storage tank 1. [ The liquefied gas supplied through the second pipe 62 and the spray head 63 in a showering manner exerts the effect of liquefying the evaporation gas in the upper portion of the storage tank 1 and supplying fuel to the storage tank 1 Can be reduced.

또 제1실시 예의 연료공급시스템은 저장탱크(1)에서 발생하는 증발가스의 양이 저압가스엔진(4) 및 고압가스엔진(3)의 사용량을 초과할 경우 이를 액화하여 다시 저장탱크(1)로 공급하기 위한 재액화시스템을 구비한다.In the fuel supply system of the first embodiment, when the amount of the evaporative gas generated in the storage tank 1 exceeds the usage amount of the low-pressure gas engine 4 and the high-pressure gas engine 3, it is liquefied and returned to the storage tank 1, And a re-liquefaction system for supplying the re-liquefaction system.

재액화시스템은 액체질소를 저장하는 질소탱크(5), 질소탱크(5)의 액체질소와 저장탱크(1)의 증발가스를 열교환시켜 증발가스를 액화시키는 열교환기(6), 저장탱크(1)의 증발가스가 보조탱크(2) 내부의 액화가스 및 열교환기(6)를 거쳐 액화된 후 저장탱크(1)로 복귀할 수 있도록 하는 재액화라인(70), 질소탱크(5)의 액체질소가 열교환기(6) 및 보조탱크(2) 내부의 액화가스와 열교환 한 후 다시 질소탱크(5)로 복귀할 수 있도록 하는 질소순환라인(80)을 구비한다. 또 재액화시스템은 질소탱크(5) 내부의 질소가스를 액화한 후 다시 질소탱크(5)로 복귀시키는 질소액화라인(90)을 포함한다.The re-liquefaction system includes a nitrogen tank 5 for storing liquid nitrogen, a heat exchanger 6 for liquefying the evaporation gas by exchanging liquid nitrogen of the nitrogen tank 5 and the evaporation gas of the storage tank 1, Liquid refining line 70 for allowing the evaporated gas of the nitrogen tank 5 to return to the storage tank 1 after being liquefied through the liquefied gas and heat exchanger 6 in the auxiliary tank 2, And a nitrogen circulation line 80 for allowing the nitrogen to return to the nitrogen tank 5 after heat exchange with the liquefied gas in the heat exchanger 6 and the auxiliary tank 2. The re-liquefaction system also includes a nitrogen liquefaction line 90 for liquefying the nitrogen gas in the nitrogen tank 5 and then returning it to the nitrogen tank 5.

재액화라인(70)은 제4연료공급라인(40)으로부터 분기되어 보조탱크(2) 내부의 액화가스에 잠긴상태로 설치되는 스파이럴형 열교환부(2a) 및 열교환기(6)를 거친 후 벙커링라인(60)에 연결될 수 있다. 또 재액화라인(70)에는 저장탱크(1) 내부압력을 고려해 열교환기(6)에서 액화된 액화가스가 감압상태에서 저장탱크(1)로 공급될 수 있도록 하는 감압밸브(71)가 설치될 수 있다. The re-liquefaction line 70 is branched from the fourth fuel supply line 40 and passes through the spiral heat exchanger 2a and the heat exchanger 6, which are installed in a state of being immersed in the liquefied gas in the auxiliary tank 2, Line < / RTI > The re-liquefaction line 70 is provided with a pressure reducing valve 71 for allowing the liquefied gas liquefied in the heat exchanger 6 to be supplied from the depressurized state to the storage tank 1 in consideration of the internal pressure of the storage tank 1 .

재액화라인(70)은 다단 압축기(31)에서 압축된 증발가스가 보조탱크(2)의 열교환부(2a)를 거치면서 1차 열교환하여 냉각되고, 열교환기(6)에서 2차 열교환을 하며 재 냉각되기 때문에 증발가스의 액화효율을 높일 수 있다. The re-liquefaction line 70 is cooled by the primary heat exchange while the evaporated gas compressed by the multi-stage compressor 31 passes through the heat exchanging section 2a of the auxiliary tank 2 and is subjected to the secondary heat exchange in the heat exchanger 6 The liquefaction efficiency of the evaporation gas can be increased.

질소순환라인(80)은 질소탱크(5) 내부로부터 연장되어 열교환기(6) 및 보조탱크(2) 내부의 액화가스에 잠긴상태로 설치되는 스파이럴형 열교환부(2b)를 거친 후 다시 질소탱크(5) 내부로 연장되는 형태로 구성될 수 있다. 질소순환라인(80)에는 질소탱크(5) 내부의 액체질소를 열교환기(6) 쪽으로 압송하는 질소펌프(81)와, 열교환기(6) 및 보조탱크(2)의 열교환부(2b)를 거쳐 질소탱크(5)로 복귀하는 질소가스를 감압 팽창시켜 일부 액화시키는 팽창장치(82)를 포함할 수 있다.The nitrogen circulation line 80 is passed through a spiral heat exchanger 2b which extends from the inside of the nitrogen tank 5 and is installed in a state of being immersed in the liquefied gas in the heat exchanger 6 and the auxiliary tank 2, (Not shown). The nitrogen circulation line 80 is provided with a nitrogen pump 81 for feeding liquid nitrogen in the nitrogen tank 5 toward the heat exchanger 6 and a heat exchanger 2b of the heat exchanger 6 and the auxiliary tank 2 And an expansion device 82 for decompressing and expanding the nitrogen gas returned to the nitrogen tank 5 to partially liquefy.

또 질소탱크(1)에는 내부를 설정한 압력으로 유지할 수 있도록 하는 압력조절부(5a)가 설치될 수 있다. 압력조절부(5a)는 질소탱크(5) 내부의 액체질소를 가열하여 기화시킨 후 질소탱크(5) 내부로 공급함으로써 질소탱크(5)의 압력을 상승시키는 방식이다.In addition, the nitrogen tank 1 may be provided with a pressure regulating portion 5a for maintaining the inside of the nitrogen tank 1 at a set pressure. The pressure regulating part 5a is a method of heating the liquid nitrogen in the nitrogen tank 5 to vaporize it and then feeding it into the nitrogen tank 5 to raise the pressure of the nitrogen tank 5. [

질소순환라인(80)으로 공급되는 액체질소는 열교환기(6)로 공급되어 열교환을 통해 재액화라인(70)의 증발가스를 액화시키면서 기화되지만, 이러한 질소가 보조탱크(2)의 열교환부(2b)를 거치며 액화가스와 열교환하여 다시 냉각되고, 이 상태에서 팽창장치(82)를 거쳐 감압 팽창되는 과정에서 상당부분 액화된 후 질소탱크(5)로 복귀한다. 따라서 질소탱크(5)로 복귀하는 질소의 기화량을 최소화할 수 있다.The liquid nitrogen supplied to the nitrogen circulation line 80 is supplied to the heat exchanger 6 and is vaporized while liquefying the evaporation gas of the re-liquefaction line 70 through heat exchange. However, this nitrogen is supplied to the heat exchanger 2b, and is cooled again. In this state, the liquid is largely liquefied in the process of decompression expansion through the expansion device 82, and then returned to the nitrogen tank 5. Therefore, the amount of nitrogen to be returned to the nitrogen tank 5 can be minimized.

질소탱크(5) 내부로 진입하는 질소순환라인(80)의 종단에는 액체질소에 잠긴상태로 설치되는 스파이럴형 열교환부(5a)가 마련될 수 있다. 이 열교환부(5a)는 질소탱크(5)로 복귀하는 질소가 질소탱크(5a) 내부로 배출되는 과정에서 질소탱크(5) 내부의 액체질소와 열교환하여 액화되도록 할 수 있다.At the end of the nitrogen circulation line (80) entering into the nitrogen tank (5), a spiral heat exchanger (5a) installed in a state of being immersed in liquid nitrogen may be provided. The heat exchanging unit 5a may heat the nitrogen returning to the nitrogen tank 5 to heat with the liquid nitrogen in the nitrogen tank 5 during the discharge of the nitrogen into the nitrogen tank 5a.

질소액화라인(90)은 질소탱크(5) 내부의 질소가스가 질소압축기(91), 열교환기(6), 감압 팽창장치(92)를 순차적으로 거친 후 질소탱크(5)로 복귀하는 유로를 구성하도록 마련될 수 있다. 이는 질소가스를 질소압축기(91)에서 고압으로 압축한 후 열교환기(6)와 열교환을 통해 냉각시키고, 이를 팽창장치(92)에서 감암 팽창시킴으로써 질소가스를 액화시킬 수 있도록 한 것이다. 질소액화라인(90)에는 필요시 질소압축기(91)를 거친 질소가스의 냉각을 위한 열교환기(93)가 설치될 수 있다.The nitrogen liquefaction line 90 is a line for returning the nitrogen gas in the nitrogen tank 5 to the nitrogen tank 5 after passing through the nitrogen compressor 91, the heat exchanger 6 and the decompression expansion device 92 in sequence As shown in FIG. This is because the nitrogen gas is compressed to a high pressure in the nitrogen compressor 91 and then cooled through heat exchange with the heat exchanger 6 and the nitrogen gas is liquefied by expanding and expanding it in the expansion device 92. The nitrogen liquefaction line (90) may be equipped with a heat exchanger (93) for cooling nitrogen gas through a nitrogen compressor (91), if necessary.

또 질소액화라인(90)은 질소압축기(91)에서 압축된 질소가스가 제2연료공급라인(20) 외측을 포위하는 겹층배관(25) 내부를 통과하면서 이 겹층배관(25)의 퍼징(Purging)을 수행하도록 할 수 있다. 고압가스엔진(3)과 연결되는 제2연료공급라인(20)은 안전을 위해 2중 또는 3중의 겹층배관(25)으로 구성되고, 이 겹층배관(25)으로 질소와 같은 불활성가스를 공급해 퍼징을 수행하는데, 질소액화라인(90)의 질소가스가 열교환기(6) 쪽으로 공급되는 과정에서 겹층배관(25)을 통과하며 퍼징을 수행할 수 있도록 한 것이다.The nitrogen liquefaction line 90 is also connected to the second fuel supply line 20 so that the nitrogen gas compressed by the nitrogen compressor 91 passes through the inside of the double layer pipe 25 surrounding the outside of the second fuel supply line 20, ). ≪ / RTI > The second fuel supply line 20 connected to the high pressure gas engine 3 is composed of double or triple double layer piping 25 for safety and an inert gas such as nitrogen is supplied to the double layer piping 25, The nitrogen gas in the nitrogen liquefaction line 90 is supplied to the heat exchanger 6 and passes through the laminar pipe 25 to perform purging.

이처럼 제1실시 예의 연료공급시스템은 질소탱크(1)의 질소가스를 질소액화라인(90)을 통해 재액화시킬 수 있기 때문에 질소의 보충이 없이도 증발가스의 연속적인 재액화를 수행할 수 있다. 또 질소가스를 액화시키는 과정에서 질소액화라인(90)의 질소가스가 엔진 연료계통의 겹층배관(25)을 통과하도록 하기 때문에 질소가스의 액화과정에서 연료계통 겹층배관(25)의 퍼징을 수행할 수 있다.As described above, the fuel supply system of the first embodiment can perform continuous liquefaction of the evaporated gas without supplementing nitrogen since the nitrogen gas in the nitrogen tank 1 can be resuspended through the nitrogen liquefaction line 90. Further, in the process of liquefying the nitrogen gas, since the nitrogen gas of the nitrogen liquefaction line 90 is allowed to pass through the double-layer piping 25 of the engine fuel system, the purging of the fuel system laminar piping 25 is performed in the liquefaction process of the nitrogen gas .

도 2는 본 발명의 제2실시 예에 따른 연료공급시스템을 나타낸다. 제2실시 예는 질소액화라인(190)의 질소가스가 보조탱크(2) 내부의 액화가스와 열교환을 하도록 한 점에서 제1실시 예와 차별된다. 2 shows a fuel supply system according to a second embodiment of the present invention. The second embodiment is different from the first embodiment in that the nitrogen gas in the nitrogen liquefaction line 190 makes heat exchange with the liquefied gas in the auxiliary tank 2.

즉 제2실시 예에서 질소액화라인(190)은 질소탱크(5)의 질소가스가 질소압축기(91)에서 압축된 후, 제2연료공급라인(20)의 겹층배관(25)을 통과하면서 퍼징을 하고, 보조탱크(2) 내부의 열교환부(2c)를 통과하면서 액화가스에 의해 냉각되며, 이어 팽창장치(92)를 거치면서 액화된 후 질소탱크(5)로 복귀하도록 구성될 수 있다. 나머지는 전술한 제1실시 예와 동일하게 구성될 수 있다. That is, in the second embodiment, the nitrogen liquefaction line 190 is configured such that the nitrogen gas in the nitrogen tank 5 is compressed by the nitrogen compressor 91 and then passed through the double layer piping 25 of the second fuel supply line 20, Is cooled by the liquefied gas while passing through the heat exchanging section 2c in the auxiliary tank 2 and is then liquefied through the expansion device 92 and then returned to the nitrogen tank 5. The remainder can be configured in the same manner as in the first embodiment described above.

1: 저장탱크, 2: 보조탱크,
3: 고압가스엔진, 4: 저압가스엔진,
5: 질소탱크, 6: 열교환기,
10: 제1연료공급라인, 20: 제2연료공급라인,
21: 고압펌프, 25: 겹층배관,
30: 제3연료공급라인, 31: 다단 압축기,
40: 제4연료공급라인, 50: 제5연료공급라인,
60: 벙커링라인, 70: 재액화라인,
80: 질소순환라인, 81: 질소펌프,
82: 팽창장치, 90: 질소액화라인,
91: 질소압축기, 92: 팽창장치.1: storage tank, 2: auxiliary tank,
3: high pressure gas engine, 4: low pressure gas engine,
5: nitrogen tank, 6: heat exchanger,
10: first fuel supply line, 20: second fuel supply line,
21: high pressure pump, 25: double layer piping,
30: Third fuel supply line, 31: Multistage compressor,
40: fourth fuel supply line, 50: fifth fuel supply line,
60: bunkering line, 70: refill line,
80: nitrogen circulation line, 81: nitrogen pump,
82: expansion device, 90: nitrogen liquefaction line,
91: nitrogen compressor, 92: expansion device.

Claims (7)

액화가스를 저장하는 저장탱크;
상기 저장탱크로부터 액화가스를 공급받아 저장하는 보조탱크;
상기 보조탱크에 저장된 액화가스를 처리하여 엔진으로 공급하는 연료공급라인;
액체질소를 저장하는 질소탱크;
상기 저장탱크의 증발가스를 상기 보조탱크 내부의 액화가스 및 열교환기와 열교환을 통해 액화시킨 후 상기 저장탱크로 복귀시키는 재액화라인; 및
상기 질소탱크의 액체질소를 상기 열교환기 및 상기 보조탱크 내부의 액화가스와 열교환 후에 상기 질소탱크로 복귀시키는 질소순환라인을 포함하는 연료공급시스템.A storage tank for storing liquefied gas;
An auxiliary tank for receiving and storing liquefied gas from the storage tank;
A fuel supply line which processes the liquefied gas stored in the auxiliary tank and supplies it to the engine;
A nitrogen tank for storing liquid nitrogen;
A re-liquefaction line for liquefying the evaporation gas of the storage tank through heat exchange with a liquefied gas and a heat exchanger in the auxiliary tank and returning the liquefied gas to the storage tank; And
And a nitrogen circulation line for returning the liquid nitrogen of the nitrogen tank to the nitrogen tank after heat exchange with the liquefied gas inside the heat exchanger and the auxiliary tank. 제1항에 있어서,
상기 재액화라인은 상기 보조탱크 내부의 액화가스에 잠긴상태로 설치되는 열교환부를 포함하는 연료공급시스템.The method according to claim 1,
And the re-liquefaction line includes a heat exchanger installed in a state of being submerged in liquefied gas in the auxiliary tank. 제1항에 있어서,
상기 질소순환라인은 상기 질소탱크 내부의 액체질소를 압송하는 질소펌프와, 상기 열교환기 및 상기 보조탱크를 거쳐 상기 질소탱크로 복귀하는 질소가스를 감압 팽창시키는 팽창장치를 포함하는 연료공급시스템.The method according to claim 1,
Wherein the nitrogen circulation line includes a nitrogen pump that pressurizes liquid nitrogen in the nitrogen tank and an expansion device that decompressively expands the nitrogen gas returned to the nitrogen tank through the heat exchanger and the auxiliary tank. 제2항에 있어서
상기 질소순환라인은 상기 보조탱크 내부의 액화가스에 잠긴상태로 설치되는 열교환부와, 상기 질소탱크 내부의 액체질소에 잠긴상태로 설치되는 스파이럴형 열교환부를 포함하는 연료공급시스템.The method according to claim 2, wherein
Wherein the nitrogen circulation line includes a heat exchange unit installed in a state of being submerged in the liquefied gas in the auxiliary tank and a spiral heat exchange unit installed in a state of being immersed in liquid nitrogen in the nitrogen tank. 제1항에 있어서,
상기 질소탱크의 질소가스를 압축기에서 압축한 후 상기 열교환기에서 열교환시키고, 팽창장치에서 액화한 후 상기 질소탱크로 복귀시키는 질소액화라인을 더 포함하는 연료공급시스템.The method according to claim 1,
Further comprising a nitrogen liquefaction line for compressing nitrogen gas in the nitrogen tank in a compressor and then performing heat exchange in the heat exchanger, liquefying in an expansion device, and returning the nitrogen gas to the nitrogen tank. 제1항에 있어서,
상기 질소탱크의 질소가스를 압축기에서 압축한 후 상기 보조탱크 내부의 액화가스와 열교환시키고, 팽창장치에서 액화한 후 상기 질소탱크로 복귀시키는 질소액화라인을 더 포함하는 연료공급시스템.The method according to claim 1,
Further comprising a nitrogen liquefaction line for compressing the nitrogen gas in the nitrogen tank with a compressor and then performing heat exchange with the liquefied gas in the auxiliary tank, liquefying the liquefied gas in the expansion tank, and returning the liquefied gas to the nitrogen tank. 제5항 또는 제6항에 있어서,
상기 질소액화라인은 상기 압축기에서 압축된 질소가스를 상기 연료공급라인 외측을 포위하는 겹층배관 내부를 통과시켜 상기 겹층배관의 퍼징(Purging)을 수행하는 연료공급시스템.The method according to claim 5 or 6,
Wherein the nitrogen liquefaction line passes the compressed nitrogen gas in the compressor through the inside of the double layer pipe enclosing the outside of the fuel supply line to perform the purging of the double layer pipe.
KR1020140173548A 2014-12-05 2014-12-05 Fuel supply system KR102173909B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140173548A KR102173909B1 (en) 2014-12-05 2014-12-05 Fuel supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140173548A KR102173909B1 (en) 2014-12-05 2014-12-05 Fuel supply system

Publications (2)

Publication Number Publication Date
KR20160068178A true KR20160068178A (en) 2016-06-15
KR102173909B1 KR102173909B1 (en) 2020-11-05

Family

ID=56134915

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140173548A KR102173909B1 (en) 2014-12-05 2014-12-05 Fuel supply system

Country Status (1)

Country Link
KR (1) KR102173909B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102132151B1 (en) * 2019-05-24 2020-07-10 송달호 Ship propelled by liquefied petroleum gas
FR3101408A1 (en) * 2019-09-30 2021-04-02 Gaztransport Et Technigaz System for treating a gas contained in a gas storage and / or transport tank in the liquid and gaseous state
RU2808506C1 (en) * 2019-09-30 2023-11-28 Газтранспорт Эт Технигаз System for processing gas contained in tank for storing and/or transporting gas in liquid and gaseous state

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050094798A (en) * 2005-09-08 2005-09-28 주식회사 동화엔텍 Pre-cooling system of boil-off gas from lng
KR100699163B1 (en) * 2005-11-17 2007-03-23 신영중공업주식회사 Reliquefaction apparatus of lng bog and reliquefaction method
KR20070038668A (en) * 2005-10-06 2007-04-11 삼성중공업 주식회사 Lng reliquefaction method and apparatus in lng carrier
KR20080104110A (en) 2007-05-08 2008-12-01 대우조선해양 주식회사 System and method for supplying fuel gas in ships
JP2013209000A (en) * 2012-03-30 2013-10-10 Mitsubishi Heavy Ind Ltd Vessel, liquefied fuel gas transfer device and liquefied fuel gas transfer method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050094798A (en) * 2005-09-08 2005-09-28 주식회사 동화엔텍 Pre-cooling system of boil-off gas from lng
KR20070038668A (en) * 2005-10-06 2007-04-11 삼성중공업 주식회사 Lng reliquefaction method and apparatus in lng carrier
KR100699163B1 (en) * 2005-11-17 2007-03-23 신영중공업주식회사 Reliquefaction apparatus of lng bog and reliquefaction method
KR20080104110A (en) 2007-05-08 2008-12-01 대우조선해양 주식회사 System and method for supplying fuel gas in ships
JP2013209000A (en) * 2012-03-30 2013-10-10 Mitsubishi Heavy Ind Ltd Vessel, liquefied fuel gas transfer device and liquefied fuel gas transfer method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102132151B1 (en) * 2019-05-24 2020-07-10 송달호 Ship propelled by liquefied petroleum gas
FR3101408A1 (en) * 2019-09-30 2021-04-02 Gaztransport Et Technigaz System for treating a gas contained in a gas storage and / or transport tank in the liquid and gaseous state
WO2021064319A1 (en) * 2019-09-30 2021-04-08 Gaztransport Et Technigaz System for treating a gas contained in a tank for storing and/or transporting gas in the liquid and gaseous state
RU2808506C1 (en) * 2019-09-30 2023-11-28 Газтранспорт Эт Технигаз System for processing gas contained in tank for storing and/or transporting gas in liquid and gaseous state

Also Published As

Publication number Publication date
KR102173909B1 (en) 2020-11-05

Similar Documents

Publication Publication Date Title
KR101711997B1 (en) Fuel supply system
KR102189792B1 (en) Reliquefaction system of liquified fuel propulsion ship
KR101726668B1 (en) System And Method For Treatment Of Boil Off Gas
KR101344774B1 (en) Fuel gas supply and re-liquefaction system of lng/lpg combined carrier
KR101701713B1 (en) Fuel supply system
KR102189715B1 (en) Fuel supply system
KR20170041406A (en) Fuel gas supplying system in ships
KR20110019156A (en) Liquefied natural gas reliquefaction apparatus
KR101164087B1 (en) Apparatus and method for treating boil-off gas to reduce reliquefaction power consumption
KR101711955B1 (en) Fuel gas supplying system in ships
KR101751331B1 (en) Fuel gas supplying system in ships
KR20170041411A (en) Fuel gas supplying system in ships
KR101722372B1 (en) Fuel gas supplying system in ships
KR101505796B1 (en) Venting apparatus for engine and fuel gas supply system in ships
KR20150101619A (en) System for supplying fuel gas in ships
KR101732554B1 (en) Fuel gas supplying system in ships
KR20170031429A (en) Fuel gas supplying system in ships
KR101661929B1 (en) Fuel gas supplying system in ships
KR20160068178A (en) Fuel supply system
KR20160120878A (en) Fuel gas supply system
KR101722369B1 (en) Fuel gas supplying system in ships
KR101732551B1 (en) Fuel gas supplying system in ships
KR20160099211A (en) Fuel gas supplying system in ships
KR20160068179A (en) Reliquefaction system
KR20150062382A (en) System for supplying fuel gas in ships

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right