KR20170062227A - BOG treatment system for LNG tank ship - Google Patents

BOG treatment system for LNG tank ship Download PDF

Info

Publication number
KR20170062227A
KR20170062227A KR1020150167769A KR20150167769A KR20170062227A KR 20170062227 A KR20170062227 A KR 20170062227A KR 1020150167769 A KR1020150167769 A KR 1020150167769A KR 20150167769 A KR20150167769 A KR 20150167769A KR 20170062227 A KR20170062227 A KR 20170062227A
Authority
KR
South Korea
Prior art keywords
bog
line
gas
fuel tank
heat exchanger
Prior art date
Application number
KR1020150167769A
Other languages
Korean (ko)
Inventor
배찬효
박승하
허정호
Original Assignee
주식회사 동화엔텍
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 주식회사 동화엔텍 filed Critical 주식회사 동화엔텍
Priority to KR1020150167769A priority Critical patent/KR20170062227A/en
Publication of KR20170062227A publication Critical patent/KR20170062227A/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
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • 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
    • F25J1/0032—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • 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
    • F25J1/005—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 expansion of a gaseous refrigerant stream with extraction of work
    • 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
    • F25J1/0203—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
    • F25J1/0208—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 in combination with an internal quasi-closed refrigeration loop, e.g. with deep flash recycle loop
    • 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
    • F25J1/0247—Different modes, i.e. 'runs', of operation; Process control start-up of the process
    • 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
    • F25J1/0262—Details of the cold heat exchange system
    • F25J1/0264—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams
    • F25J1/0265—Arrangement of heat exchanger cores in parallel with different functions, e.g. different cooling streams comprising cores associated exclusively with the cooling of a refrigerant stream, e.g. for auto-refrigeration or economizer
    • 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
    • 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
    • F17C2227/0348—Water 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
    • F17C2265/01—Purifying the fluid
    • F17C2265/015—Purifying the fluid by separating
    • F17C2265/017—Purifying the fluid by separating different phases of a same 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
    • 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
    • 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
    • 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream

Abstract

본 발명은 가스추진선박의 연료탱크 BOG처리 시스템에 관한 것으로, 내부에 발생된 BOG(Boil Off Gas)가 입구에서 출구로 순환되는 BOG순환라인이 구비된 LNG연료탱크; 열교환기, 쿨러, 응축기, 팽창기로 냉매가 순환되게 연결되게 구성되며, 상기 열교환기에서 상기 냉매와 상기 BOG가 열교환되어 상기 BOG를 냉각하게 하는 냉매라인이 구비된 저온측액화장비; 및 상기 BOG순환라인에 설치되어 상기 열교환기에 의해 냉각된 상기 BOG를 액체와 기체를 분리하되, 액체는 상기 입구측 BOG순환라인으로 연결되어 상기 LNG연료탱크로 회수되게 하고, 기체는 상기 출구측 BOG순환라인으로 연결되어 상기 열교환기로 재냉각되게 하는 바이패스라인이 구비된 기액분리기;가 포함된 것을 특징으로 한다.The present invention relates to a fuel tank BOG treatment system for a gas propulsion vessel, comprising: an LNG fuel tank having a BOG circulation line in which BOG (Boil Off Gas) generated therein is circulated from an inlet to an outlet; A low temperature side liquefying equipment having a refrigerant line circulated through a heat exchanger, a cooler, a condenser, and an expander, and a refrigerant line for cooling the BOG by heat exchange between the refrigerant and the BOG in the heat exchanger; And separating the liquid and gas from the BOG installed in the BOG circulation line and cooled by the heat exchanger, the liquid being connected to the inlet side BOG circulation line to be recovered to the LNG fuel tank, And a gas-liquid separator connected to the circulation line and having a bypass line to be re-cooled by the heat exchanger.

Description

가스추진선박의 연료탱크 BOG처리 시스템{BOG treatment system for LNG tank ship}[0001] The present invention relates to a BOG treatment system for an LNG tank ship,

본 발명은 가스추진선박의 연료탱크 BOG처리 시스템에 관한 것으로, 연료탱크 내부에 발생된 BOG를 냉각하여 처리하고, 냉각효율을 향상시킬 수 있는 가스추진선박의 연료탱크 BOG처리 시스템에 관한 기술이다.TECHNICAL FIELD The present invention relates to a fuel tank BOG treatment system for a gas propulsion vessel, and relates to a fuel tank BOG treatment system of a gas propulsion vessel capable of cooling and treating BOG generated in a fuel tank to improve cooling efficiency.

통상적으로 천연 가스(Natural Gas)는 액화 상태에서 선박에 의해 장거리 수송된다. 이를 위해 액화 천연가스(Liquefied Natural Gas, 이하 'LNG'라 칭하도록 한다.)는 극저온, 예를 들어, -160 ℃이하의 온도에서 액화되어 LNG 운반선을 이용하여 이송된다.Natural gas is typically transported long distances by the ship in the liquefied state. For this purpose, Liquefied Natural Gas (hereinafter referred to as "LNG") is liquefied at a cryogenic temperature, for example, -160 ° C. or lower, and transported using an LNG carrier.

액화된 LNG의 수송시 액화된 LNG가 저장되는 LNG 운반선의 저장탱크는 외부로부터 지속적으로 열전달을 받기 때문에, 저장탱크 안의 LNG는 지속적으로 기화되며, 이와 같이 기화된 가스는 재액화하여 다시 저장탱크로 돌려보낼 필요가 있기 때문에, 이를 위하여 기화된 가스를 냉각하여 재액화하는 시스템이 종래 등록특허 제10-1010329호 'ＬＮＧ 운반선 내 ＬＮＧ 저장 탱크의 증발가스 냉각 시스템'으로 개시되어 있다.The LNG carrier in the liquefied LNG storage tank is continuously transferred from the outside, so that the LNG in the storage tank is continuously vaporized, and the vaporized gas is re-liquefied and returned to the storage tank A system for cooling the vaporized gas to re-liquefy it is disclosed as a conventional evaporation gas cooling system of LNG storage tank in LNG carrier.

그러나, LNG 저장탱크의 용량도 크고 그에 따라 기화된 가스(BOG, Boil Off Gas)도 많이 발생하게 된다. 이를 냉각화하는 시스템도 대형화되어야 하므로 비용이 많이 들므로 냉각효율을 최대한 향상시킬 수 있는 기술 개발이 지속적으로 요구되고 있다.However, the capacity of the LNG storage tank is large, and accordingly, many boil-off gases (BOG) are generated. And the system for cooling it must be enlarged. Therefore, there is a continuing need to develop a technology that can maximize the cooling efficiency because it is expensive.

KRKR 10-101032910-1010329 B1B1

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, BOG 냉각효과를 극대화하고 효율적으로 처리할 수 있는 가스추진선박의 연료탱크 BOG처리 시스템을 제공하고자 하는데 그 목적이 있다.SUMMARY OF THE INVENTION It is an object of the present invention to provide a fuel tank BOG treatment system for a gas propulsion vessel capable of maximizing a BOG cooling effect and efficiently processing the same.

상기와 같은 목적을 달성하기 위하여 본 발명은 내부에 발생된 BOG(Boil Off Gas)가 입구에서 출구로 순환되는 BOG순환라인이 구비된 LNG연료탱크; 열교환기, 쿨러, 응축기, 팽창기로 냉매가 순환되게 연결되게 구성되며, 상기 열교환기에서 상기 냉매와 상기 BOG가 열교환되어 상기 BOG를 냉각하게 하는 냉매라인이 구비된 저온측액화장비; 및 상기 BOG순환라인에 설치되어 상기 열교환기에 의해 냉각된 상기 BOG를 액체와 기체를 분리하되, 액체는 상기 입구측 BOG순환라인으로 연결되어 상기 LNG연료탱크로 회수되게 하고, 기체는 상기 출구측 BOG순환라인으로 연결되어 상기 열교환기로 재냉각되게 하는 바이패스라인이 구비된 기액분리기;가 포함된 것을 특징으로 한다.In order to accomplish the above object, the present invention provides an LNG fuel tank having a BOG circulation line in which BOG generated from the inside is circulated from an inlet to an outlet; A low temperature side liquefying equipment having a refrigerant line circulated through a heat exchanger, a cooler, a condenser, and an expander, and a refrigerant line for cooling the BOG by heat exchange between the refrigerant and the BOG in the heat exchanger; And separating the liquid and gas from the BOG installed in the BOG circulation line and cooled by the heat exchanger, the liquid being connected to the inlet side BOG circulation line to be recovered to the LNG fuel tank, And a gas-liquid separator connected to the circulation line and having a bypass line to be re-cooled by the heat exchanger.

상기 BOG순환라인에는 상기 쿨러와 순환되어 상기 열교환기측으로 연결되게 하는 쿨러라인이 더 구비되는 것을 특징으로 한다.The BOG circulation line is further provided with a cooler line circulated to the cooler and connected to the heat exchanger.

상기 냉매라인은 상기 응축기와 상기 팽창기 사이에서 상기 쿨러와 더 연결되게 구비된 것을 특징으로 한다.And the refrigerant line is connected to the cooler between the condenser and the inflator.

상기 바이패스라인은, 외측으로 보일러 또는 엔진으로 연결되어 연료 공급되는 것을 특징으로 한다.The bypass line is connected to the outside through a boiler or an engine and is supplied with fuel.

상기와 같은 구성의 본 발명에 따르면, 다음과 같은 효과를 기대할 수 있을 것이다.According to the present invention having the above-described configuration, the following effects can be expected.

먼저, 가스추진선박 특히 LNG 연료탱크가 설치된 선박에서 연료탱크에서 발생하는 BOG를 냉각함으로써, 기존에 연소 후 배출되는 에너지 절감할 수 있다.First, by cooling the BOG generated from the fuel tank in a ship equipped with a gas propulsion vessel, in particular, an LNG fuel tank, it is possible to save energy after combustion.

그리고, LNG 연료탱크에서는 외부 열에 의해 BOG가 발생하고, 이 BOG는 탱크 내부의 압력을 상승시켜, 상승된 압력으로 인해 탱크가 파괴될 수 있다. 따라서 BOG를 배출하여 탱크 압력을 유지할 수 있다. In the LNG fuel tank, BOG is generated by the external heat, and the BOG raises the pressure inside the tank, so that the tank can be destroyed due to the increased pressure. Therefore, the tank pressure can be maintained by discharging the BOG.

탱크 압력을 일정하게 유지할 수 있기 때문에 저압의 멤브레인 형태의 LNG 연료탱크에서부터 압력용기 형태의 C형(실린더 형태)과 격자형태의 탱크에 모두 사용이 가능하다. Because the tank pressure can be kept constant, it can be used in low pressure membrane LNG fuel tanks, pressure vessel type C (cylinder type) and lattice type tanks.

그리고, 쿨러 사용에 의해 사용시 냉각 효율 높고, 냉매(N2) 유량을 저감할 수 있다.By using the cooler, the cooling efficiency at the time of use is high, and the flow rate of the refrigerant (N2) can be reduced.

도 1은 종래에 따른
도 2는 본 발명의 실시예에 가스추진선박의 연료탱크 BOG처리 시스템의 시스템도이다.Fig. 1 is a cross-
2 is a system diagram of a fuel tank BOG treatment system of a gas propulsion vessel according to an embodiment of the present invention.

이하, 첨부된 도면을 참고로 본 발명의 바람직한 실시예에 대하여 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

도 2는 본 발명의 실시예에 가스추진선박의 연료탱크 BOG처리 시스템의 시스템도이다.2 is a system diagram of a fuel tank BOG treatment system of a gas propulsion vessel according to an embodiment of the present invention.

도 2를 참조하면, 본 발명인 가스추진선박의 연료탱크 BOG처리 시스템은 LNG연료탱크(100)와, 저온측액화장비(200) 및 기액분리기(300)로 그 구성이 이루어지고, LNG연료탱크(100)에는 BOG순환라인(A)과, 저온측액화장비(200)에는 냉매라인(B) 및 기액분리기(300)에는 바이패스라인(C)으로 이루어져 LNG연료탱크(100)에서 발생하는 BOG(Boil Off Gas)를 처리할 수 있다.Referring to FIG. 2, the fuel tank BOG treatment system of the gas propulsion vessel of the present invention is constituted by an LNG fuel tank 100, a low temperature side liquefier 200 and a gas-liquid separator 300, and an LNG fuel tank BOG circulation line A in the LNG fuel tank 100 and a refrigerant line B in the low temperature side liquefier 200 and a bypass line C in the gas-liquid separator 300, Boil Off Gas) can be processed.

먼저, 상기 LNG연료탱크(100)는 내부에 LNG를 저장하고 상부에는 출구가 형성되고 하부에는 입구가 형성된다.First, the LNG fuel tank 100 stores LNG therein, an outlet is formed at an upper portion, and an inlet is formed at a lower portion.

상기 LNG연료탱크내(100)에는 BOG가 발생하여 상승하게 되어 출구측으로 이동되고, 순환되어 입구로 다시 유입되게 하는 BOG순환라인(A)이 구비되게 된다.A BOG circulation line A is provided in the LNG fuel tank 100 to cause BOG to rise and move to the outlet side so that the BOG circulation line A circulates and flows back to the inlet.

상기 저온측액화장비(200)는 상기 BOG를 열교환에 의해 냉각할 수 있는 장비이다.The low temperature side liquefier 200 is a device that can cool the BOG by heat exchange.

상기 저온측액화장비(200)는 그 구성을 열교환기(220), 쿨러(240), 응축기(260), 팽창기(280)로 냉매가 순환되게 연결되게 구성되며, 상기 열교환기에서 상기 냉매와 상기 BOG가 열교환되어 상기 BOG를 냉각하게 하는 냉매라인(B)이 구비된다.The low temperature side liquefier 200 is configured such that the refrigerant is circulated through the heat exchanger 220, the cooler 240, the condenser 260 and the inflator 280 so that the refrigerant is circulated in the heat exchanger 220, And a refrigerant line (B) for allowing the BOG to heat-exchange and cool the BOG.

상기 기액분리기(300)는 냉각된 BOG를 액체와 기체를 분리하여 처리하는 기기이다.The gas-liquid separator 300 separates and processes the cooled BOG from the liquid and the gas.

상기 기액분리기(300)는 상기 BOG순환라인(A)에 설치되어 상기 열교환기(220)에 의해 냉각된 상기 BOG를 액체와 기체를 분리하게 된다.The gas-liquid separator 300 is installed in the BOG circulation line A to separate the liquid and the gas from the BOG cooled by the heat exchanger 220.

여기서, 분리된 액체는 상기 입구측 BOG순환라인(A)으로 연결되어 상기 LNG연료탱크(100)로 회수되게 하고, 기체는 상기 출구측 BOG순환라인으로 연결되어 상기 열교환기로 재냉각되게 하는 바이패스라인(C)이 구비된다.Here, the separated liquid is connected to the inlet side BOG circulating line (A) to be recovered to the LNG fuel tank (100), and the gas is bypassed to the outlet side BOG circulating line A line C is provided.

따라서, BOG가 액화되어 상기 LNG연료탱크(100)로 보충되므로 기존에 BOG가 연소 후 배출되는 정도의 에너지를 절감할 수 있게 된다. 그리고, 상기 바이패스라인(C)에 의해 기체화된 BOG는 상기 LNG연료탱크(100)에서 배출되는 BOG보다 상대적으로 낮은 온도와 되어 합쳐지게 되어 온도는 하강하여 응축이 용이하게 된다. 온도와 응축이 쉽게 되기 때문에 상기 저온측액화장비(200)의 에너지 소모가 더 줄어들게 되는 장점이 있다.Accordingly, since the BOG is liquefied and replenished to the LNG fuel tank 100, it is possible to save energy to the extent that the BOG is discharged after the combustion. The BOG gasified by the bypass line C is relatively lower than the BOG discharged from the LNG fuel tank 100, so that the temperature is lowered and condensation is facilitated. Temperature and condensation can be easily performed. Therefore, the energy consumption of the low-temperature side liquefier 200 is further reduced.

그리고, 상기 BOG순환라인(B)에는 상기 쿨러(240)와 순환되어 상기 열교환기측으로 연결되게 하는 쿨러라인(D)이 더 구비되게 하여 저온측 기동을 원활히 할 수 있다. 정상운전시에는 쿨러라인(D)의 Valve1,2를 잠근다. The BOG circulation line (B) is further provided with a cooler line (D) circulated to the cooler (240) and connected to the heat exchanger side, so that the low temperature side start operation can be smoothly performed. Lock the valves 1 and 2 of the cooler line (D) during normal operation.

그리고, 상기 냉매라인(B)은 상기 응축기(260)와 상기 팽창기(280) 사이에서 상기 쿨러(240)와 더 연결되게 구비되어 냉매의 온도를 한번 더 쿨러(240)에 의해 냉각하여 응축이 잘 되게 할 수 있다.The refrigerant line B is further connected to the cooler 240 between the condenser 260 and the inflator 280 so that the temperature of the coolant is further cooled by the cooler 240, .

그리고, 상기 바이패스라인(C)은 외측으로 보일러 또는 엔진으로 연결되어 기체화된 NG(Natural Gas)를 연료 공급할 수 있다. 여기서 NG는 비교적 순수 메탄에 가까워 엔진연료 및 보일러 연료 사용시에는 중탄화수소(Heavy Hydrocarbon)을 별도로 분리하지 않아도 되는 이점이 있다.The bypass line (C) is connected to the outside by a boiler or an engine to supply gas (NG) gasified. In this case, since NG is relatively pure methane, there is an advantage that heavy hydrocarbon is not separated separately when engine fuel and boiler fuel are used.

이상과 같이 본 발명은 가스추진선박의 연료탱크 BOG처리 시스템을 제공하는 것을 기본적인 기술적인 사상으로 하고 있음을 알 수 있으며, 이와 같은 본 발명의 기본적인 사상의 범주내에서, 당업계의 통상의 지식을 가진 자에게 있어서는 다른 많은 변형이 가능함은 물론이다.As described above, it can be seen that the present invention is based on the basic technical idea of providing a fuel tank BOG treatment system of a gas propulsion vessel, and within the scope of the basic idea of the present invention, Of course, many other variations are possible for those who have.

A: BOG순환라인 B: 냉각라인
C: 바이패스라인 D: 쿨러라인
100: 연료탱크 200: 저옥측액화장비
220: 열교환기 240: 쿨러
260: 응축기 280: 팽창기
300: 기액분리기A: BOG circulation line B: Cooling line
C: Bypass line D: Cooler line
100: fuel tank 200: low side liquefaction equipment
220: heat exchanger 240: cooler
260: condenser 280: inflator
300: gas-liquid separator

Claims (4)

내부에 발생된 BOG(Boil Off Gas)가 입구에서 출구로 순환되는 BOG순환라인(A)이 구비된 LNG(Liquefied Natural Gas)연료탱크(100);
열교환기(220), 쿨러(240), 응축기(260), 팽창기(280)로 냉매가 순환되게 연결되게 구성되며, 상기 열교환기에서 상기 냉매와 상기 BOG가 열교환되어 상기 BOG를 냉각하게 하는 냉매라인(B)이 구비된 저온측액화장비(200); 및
상기 BOG순환라인에 설치되어 상기 열교환기에 의해 냉각된 상기 BOG를 액체와 기체를 분리하되, 액체는 상기 입구측 BOG순환라인으로 연결되어 상기 LNG연료탱크로 회수되게 하고, 기체는 상기 출구측 BOG순환라인으로 연결되어 상기 열교환기로 재냉각되게 하는 바이패스라인(C)이 구비된 기액분리기(300);가 포함된 것을 특징으로 하는 가스추진선박의 연료탱크 BOG처리 시스템.An LNG (Liquefied Natural Gas) fuel tank 100 equipped with a BOG circulation line (A) in which BOG (Boil Off Gas) generated therein is circulated from an inlet to an outlet;
The refrigerant is circulated through the heat exchanger 220, the cooler 240, the condenser 260 and the inflator 280 so that the refrigerant and the BOG are heat-exchanged in the heat exchanger to cool the BOG. (200) having a low-temperature side liquefying unit (B); And
Wherein the BOG circulation line is connected to the inlet side BOG circulation line so that the liquid is withdrawn to the LNG fuel tank and the gas is circulated through the outlet side BOG circulation line And a gas-liquid separator (300) having a bypass line (C) connected to the line to be re-cooled by the heat exchanger. 제1항에 있어서,
상기 BOG순환라인(B)에는,
상기 쿨러와 순환되어 상기 열교환기측으로 연결되게 하는 쿨러라인(D)이 더 구비되는 것을 특징으로 하는 가스추진선박의 연료탱크 BOG처리 시스템.The method according to claim 1,
In the BOG circulation line (B)
Further comprising a cooler line (D) circulated to the cooler and connected to the heat exchanger side. 제1항에 있어서,
상기 냉매라인(B)은,
상기 응축기와 상기 팽창기 사이에서 상기 쿨러와 더 연결되게 구비된 것을 특징으로 하는 가스추진선박의 연료탱크 BOG처리 시스템.The method according to claim 1,
The refrigerant line (B)
And a cooler connected to the cooler between the condenser and the inflator. 제1항에 있어서,
상기 바이패스라인(C)은,
외측으로 보일러 또는 엔진으로 연결되어 연료 공급되는 것을 특징으로 하는 가스추진선박의 연료탱크 BOG처리 시스템.The method according to claim 1,
The bypass line (C)
And the fuel tank is connected to the outside by a boiler or an engine and is supplied with fuel.
KR1020150167769A 2015-11-27 2015-11-27 BOG treatment system for LNG tank ship KR20170062227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150167769A KR20170062227A (en) 2015-11-27 2015-11-27 BOG treatment system for LNG tank ship

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150167769A KR20170062227A (en) 2015-11-27 2015-11-27 BOG treatment system for LNG tank ship

Publications (1)

Publication Number Publication Date
KR20170062227A true KR20170062227A (en) 2017-06-07

Family

ID=59223748

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150167769A KR20170062227A (en) 2015-11-27 2015-11-27 BOG treatment system for LNG tank ship

Country Status (1)

Country Link
KR (1) KR20170062227A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102162163B1 (en) * 2019-04-18 2020-10-06 현대중공업 주식회사 Ethylene sub-cooling system and ship having the same
KR20210118140A (en) * 2019-02-27 2021-09-29 미쓰비시주코마린마시나리 가부시키가이샤 Boil-off gas treatment systems and vessels
KR20240003183A (en) 2022-06-30 2024-01-08 부산대학교 산학협력단 Boil Off Gas treatment system using liquid air
KR20240008986A (en) 2022-07-12 2024-01-22 부산대학교 산학협력단 Adsorption-storage and treatment system for Boil Off Gas of liquefied gas

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210118140A (en) * 2019-02-27 2021-09-29 미쓰비시주코마린마시나리 가부시키가이샤 Boil-off gas treatment systems and vessels
KR102162163B1 (en) * 2019-04-18 2020-10-06 현대중공업 주식회사 Ethylene sub-cooling system and ship having the same
KR20240003183A (en) 2022-06-30 2024-01-08 부산대학교 산학협력단 Boil Off Gas treatment system using liquid air
KR20240008986A (en) 2022-07-12 2024-01-22 부산대학교 산학협력단 Adsorption-storage and treatment system for Boil Off Gas of liquefied gas

Similar Documents

Publication Publication Date Title
US11242123B2 (en) Boil-off gas re-liquefying system
KR101629198B1 (en) Vessel
KR101459962B1 (en) A Treatment System of Liquefied Gas
RU2719540C1 (en) Ship
KR101122548B1 (en) Liquefied natural gas reliquefaction apparatus
KR101726668B1 (en) System And Method For Treatment Of Boil Off Gas
JP2013087911A (en) Pressure rise suppression device for storage tank, pressure rise suppression system provided therewith, suppression method therefor, liquefied gas carrying vessel provided therewith, and liquefied gas storage facility provided therewith
RU2659858C2 (en) Single cascade process for vaporization and recovery of residual liquefied natural gas in application related to floating tanks
KR20170062227A (en) BOG treatment system for LNG tank ship
KR20170057393A (en) Boil-off gas reliquefaction device
KR101525664B1 (en) A treatment System of Liquefied Gas and A Method for the same
KR102020968B1 (en) BOG Reliquefaction System for Vessels and Method of Discharging Lubrication Oil in the Same
KR20140075581A (en) BOG Multi-Step Reliquefaction System And Method For Boiled Off Gas
KR101742285B1 (en) BOG Re-liquefaction Apparatus and Method for Vessel
KR20150049986A (en) A Treatment System of Liquefied Gas
JP6909229B2 (en) Ship
KR101883466B1 (en) Boil Off Gas Processing System and Method of Ship
KR20210122922A (en) Hydrogen reliquefaction system
KR20140146802A (en) Regasification System and Method of LNG
KR101438323B1 (en) A treatment System of Liquefied Gas and A Method for the same
KR101623092B1 (en) Method and apparatus for reliquefying boil-off gas using cold-heat power generation
KR20140049800A (en) Lpg reliquefaction apparatus using lng production apparatus
KR101496576B1 (en) A Treatment System of Liquefied Gas
KR101399759B1 (en) A treatment System of Liquefied Gas and A Method for the same
KR20150030938A (en) Apparatus for the reliquefaction of boil-off gas

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application