KR20140075579A - System for treating a liquefied gas - Google Patents

System for treating a liquefied gas Download PDF

Info

Publication number
KR20140075579A
KR20140075579A KR1020130122494A KR20130122494A KR20140075579A KR 20140075579 A KR20140075579 A KR 20140075579A KR 1020130122494 A KR1020130122494 A KR 1020130122494A KR 20130122494 A KR20130122494 A KR 20130122494A KR 20140075579 A KR20140075579 A KR 20140075579A
Authority
KR
South Korea
Prior art keywords
gas
compressor
storage tank
evaporated
supplied
Prior art date
Application number
KR1020130122494A
Other languages
Korean (ko)
Inventor
이준채
정제헌
문영식
김남수
최동규
장재호
Original Assignee
대우조선해양 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 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to KR1020140033793A priority Critical patent/KR101640768B1/en
Priority to KR1020140033792A priority patent/KR101640765B1/en
Publication of KR20140075579A publication Critical patent/KR20140075579A/en
Priority to JP2016523648A priority patent/JP6412565B2/en
Priority to ES14816835.4T priority patent/ES2674228T3/en
Priority to CN201480036272.5A priority patent/CN105324302B/en
Priority to SG11201510075VA priority patent/SG11201510075VA/en
Priority to RU2015153066A priority patent/RU2628556C2/en
Priority to PCT/KR2014/005672 priority patent/WO2014209029A1/en
Priority to US14/895,201 priority patent/US10518859B2/en
Priority to PL14816835T priority patent/PL3015357T3/en
Priority to EP14816835.4A priority patent/EP3015357B1/en
Priority to PH12015502846A priority patent/PH12015502846A1/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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • 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
    • F25J1/0032—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"
    • F25J1/0042—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 liquid expansion 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
    • F25J1/008—Hydrocarbons
    • F25J1/0082—Methane
    • 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
    • F25J1/0201—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 only internal refrigeration means, i.e. without external refrigeration
    • 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
    • F25J1/0201—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 only internal refrigeration means, i.e. without external refrigeration
    • F25J1/0202—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 only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal refrigeration loop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/12—Heating; 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • 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
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/60—Methane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00—Receptacles
    • Y10S220/901—Liquified gas content, cryogenic

Abstract

The present invention relates to a system for processing liquefied gas discharged from a storage tank which stores the liquefied gas. According to the present invention, the system for processing the liquefied gas to process evaporation gas discharged from the storage tank which stores the liquefied gas comprises a compressor for compressing the evaporation gas generated in the storage tank by receiving the evaporation gas from the storage tank; a heat exchanger for cooling the evaporation gas compressed in the compressor; an expansion unit for reducing the pressure of the evaporation gas cooled in the heat exchanger. The system for processing the liquefied gas exchanges the heat of the evaporation gas, supplied to the compressor by being discharged from the storage tank, and the evaporation gas compressed in the compressor through the heat exchanger.

Description

액화가스 처리 시스템 {SYSTEM FOR TREATING A LIQUEFIED GAS}[0001] SYSTEM FOR TREATING A LIQUEFIED GAS [0002]

본 발명은 액화가스를 저장하고 있는 저장탱크에서 배출되는 증발가스를 처리하는 액화가스 처리 시스템에 관한 것이다.The present invention relates to a liquefied gas processing system for treating evaporative gas discharged from a storage tank storing a liquefied gas.

근래, LNG(Liquefied Natural Gas)나 LPG(Liquefied Petroleum Gas) 등의 액화가스의 소비량이 전 세계적으로 급증하고 있는 추세이다. 액화가스는, 육상 또는 해상의 가스배관을 통해 가스 상태로 운반되거나, 또는, 액화된 상태로 액화가스 운반선에 저장된 채 원거리의 소비처로 운반된다. LNG나 LPG 등의 액화가스는 천연가스 혹은 석유가스를 극저온(LNG의 경우 대략 -163℃)으로 냉각하여 얻어지는 것으로 가스 상태일 때보다 그 부피가 대폭적으로 감소되므로 해상을 통한 원거리 운반에 매우 적합하다.In recent years, consumption of liquefied gas such as LNG (Liquefied Natural Gas) and LPG (Liquefied Petroleum Gas) has been rapidly increasing worldwide. The liquefied gas is transported in a gaseous state via land or sea gas piping, or is transported to a distant consumer site stored in a liquefied gas carrier in a liquefied state. Liquefied gas such as LNG or LPG is obtained by cooling natural gas or petroleum gas at a very low temperature (approximately -163 ° C. in the case of LNG), and its volume is significantly reduced compared to when it is in a gaseous state, .

LNG 운반선 등의 액화가스 운반선은, 액화가스를 싣고 바다를 운항하여 육상 소요처에 이 액화가스를 하역하기 위한 것이며, 이를 위해, 액화가스의 극저온에 견딜 수 있는 저장탱크(흔히, '화물창'이라 함)를 포함한다.The liquefied gas carrier, such as an LNG carrier, is used to load the liquefied gas with the liquefied gas to the sea and to unload the liquefied gas to the onshore site. For this purpose, a storage tank capable of withstanding the extremely low temperature of the liquefied gas ).

이와 같이 극저온 상태의 액화가스를 저장할 수 있는 저장탱크가 마련된 해상 구조물의 예로서는 액화가스 운반선 이외에도 LNG RV (Regasification Vessel)와 같은 선박이나, LNG FSRU (Floating Storage and Regasification Unit), LNG FPSO (Floating, Production, Storage and Off-loading), BMPP (Barge Mounted Power Plant)와 같은 구조물 등을 들 수 있다.Examples of maritime structures having storage tanks capable of storing liquefied gas at cryogenic temperatures include ships such as LNG RV (Regasification Vessel), LNG FSRU (Floating Storage and Regasification Unit), LNG FPSO , Storage and Off-loading), and BMPP (Barge Mounted Power Plant).

LNG RV는 자력 항해 및 부유가 가능한 액화천연가스 운반선에 LNG 재기화 설비를 설치한 것이다. LNG FSRU는 육상으로부터 멀리 떨어진 해상에서 LNG 수송선으로부터 하역되는 액화천연가스를 저장탱크에 저장한 후 필요에 따라 액화천연가스를 기화시켜 육상 수요처에 공급하는 구조물이고, LNG FPSO는 채굴된 천연가스를 해상에서 정제한 후 직접 액화시켜 저장탱크 내에 저장하고, 필요시 이 저장탱크 내에 저장된 LNG를 LNG 수송선으로 옮겨싣기 위해 사용되는 구조물이다. 그리고 BMPP는 바지선에 발전설비를 탑재하여 해상에서 전기를 생산하기 위해 사용되는 구조물이다.LNG RV is a LNG regeneration facility installed on a liquefied natural gas carrier capable of self-propulsion and floating. LNG FSRU is a structure that stores liquefied natural gas unloaded from LNG carrier offshore from offshore and then vaporizes liquefied natural gas as needed to supply to the demanding customers on land. LNG FPSO is a structure that supplies mined natural gas to sea , It is directly used for liquefaction and storage in a storage tank and, if necessary, for transferring LNG stored in this storage tank to an LNG carrier. And BMPP is a structure that is used to produce electricity at sea by installing a power plant on a barge.

본 명세서에서 해상 구조물이란, LNG 운반선과 같은 액화가스 운반선, LNG RV 등을 비롯하여, LNG FPSO, LNG FSRU, BMPP 등의 구조물까지도 모두 포함하는 개념이다.In the present specification, a marine structure is a concept including a liquefied gas carrier such as an LNG carrier, an LNG RV, and other structures including LNG FPSO, LNG FSRU, and BMPP.

천연가스의 액화온도는 상압에서 약 -163℃의 극저온이므로, LNG는 그 온도가 상압에서 -163℃ 보다 약간만 높아도 증발된다. 종래의 LNG 운반선의 경우를 예를 들어 설명하면, LNG 운반선의 LNG 저장탱크는 단열처리가 되어 있기는 하지만, 외부의 열이 LNG에 지속적으로 전달되므로, LNG 운반선에 의해 LNG를 수송하는 도중에 LNG가 LNG 저장탱크 내에서 지속적으로 기화되어 LNG 저장 탱크 내에 증발가스(BOG; Boil-Off Gas)가 발생한다.Since the liquefaction temperature of natural gas is a cryogenic temperature of about -163 ° C at normal pressure, LNG is evaporated even if its temperature is slightly higher than -163 ° C at normal pressure. For example, in the case of a conventional LNG carrier, the LNG storage tank of the LNG carrier is heat-treated, but since the external heat is continuously transferred to the LNG, LNG is transported by the LNG carrier, The LNG storage tank is constantly vaporized and boil-off gas (BOG) is generated in the LNG storage tank.

발생된 증발가스는 저장탱크 내의 압력을 증가시키며 선박의 요동에 따라 액화가스의 유동을 가속시켜 구조적인 문제를 야기시킬 수 있기 때문에, 증발가스의 발생을 억제할 필요가 있다.The generated evaporation gas increases the pressure in the storage tank and accelerates the flow of the liquefied gas in accordance with the shaking motion of the ship, which may cause a structural problem, so it is necessary to suppress the generation of the evaporation gas.

종래, 액화가스 운반선의 저장탱크 내에서의 증발가스를 억제 및 처리하기 위해, 증발가스를 저장탱크의 외부로 배출시켜 소각해 버리는 방법, 증발가스를 저장탱크의 외부로 배출시켜 재액화 장치를 통해 재액화시킨 후 다시 저장탱크로 복귀시키는 방법, 선박의 추진기관에서 사용되는 연료로서 증발가스를 사용하는 방법, 저장탱크의 내부압력을 높게 유지함으로써 증발가스의 발생을 억제하는 방법 등이 단독으로 혹은 복합적으로 사용되고 있었다.BACKGROUND ART [0002] Conventionally, in order to suppress and treat evaporation gas in a storage tank of a liquefied gas carrier, a method of discharging evaporation gas to the outside of the storage tank and incinerating it, a method of discharging evaporation gas to the outside of the storage tank, A method of returning to the storage tank after re-liquefying, a method of using evaporation gas as fuel used in a propulsion engine of the ship, a method of suppressing the generation of evaporation gas by keeping the internal pressure of the storage tank high, Have been used in combination.

증발가스 재액화 장치가 탑재된 종래의 선박의 경우, 저장탱크의 적정 압력 유지를 위해 저장탱크 내부의 증발가스를 저장탱크 외부로 배출시켜 재액화 장치를 통해 재액화시키게 된다. 이때, 배출된 증발가스는 냉동 사이클을 포함하는 재액화 장치에서 초저온으로 냉각된 냉매, 예를 들어 질소, 혼합냉매 등과의 열교환을 통해 재액화된 후 저장탱크로 복귀된다.In the case of a conventional ship equipped with an evaporation gas remelting device, the evaporation gas inside the storage tank is discharged to the outside of the storage tank and re-liquefied through the re-liquefaction device in order to maintain an appropriate pressure of the storage tank. At this time, the discharged evaporated gas is re-liquefied through a heat exchange with a refrigerant cooled at a cryogenic temperature, for example, nitrogen, mixed refrigerant, etc., in a liquefaction device including a refrigeration cycle, and then returned to the storage tank.

종래 DFDE 추진시스템을 탑재한 LNG 운반선의 경우, 재액화 설비를 설치하지 않고 증발가스 압축기와 가열만을 통해 증발가스를 처리한 후 DFDE에 연료로서 공급하여 증발가스를 소비하였기 때문에 엔진의 연료 필요량이 증발가스의 발생량보다 적을 때는 증발가스를 가스연소기(GCU; Gas Combustion Unit)에서 연소시켜 버리거나 대기중으로 버릴(venting) 수밖에 없는 문제가 있었다.In the case of the conventional LNG carriers equipped with the DFDE propulsion system, since the evaporative gas is treated through the evaporation gas compressor and the heating only without the liquefaction facility, and the evaporated gas is consumed by supplying the DFDE as fuel, When the amount of generated gas is less than the amount of generated gas, there is a problem that the evaporation gas must be burned in a gas combustion unit (GCU) or vented to the atmosphere.

그리고 종래 재액화 설비와 저속 디젤 엔진을 탑재한 LNG 운반선은 재액화 설비를 통해 BOG를 처리할 수 있음에도 불구하고 질소가스를 이용한 재액화 장치 운전의 복잡성으로 인해 전체 시스템의 제어가 복잡하고 상당한 양의 동력이 소모되는 문제가 있었다.Although the conventional Liquefaction Facility and the LNG carrier equipped with the low speed diesel engine can process the BOG through the liquefaction facility, the control of the entire system is complex due to the complexity of operation of the liquefaction device using nitrogen gas, There was a problem that the power was consumed.

결국, 저장탱크에 저장된 액화가스와, 이 액화가스로부터 자연적으로 발생하는 증발가스를 효율적으로 처리하기 위한 시스템 및 방법에 대한 연구 개발이 지속적으로 이루어질 필요가 있다.As a result, it is necessary to continuously research and develop systems and methods for efficiently treating the liquefied gas stored in the storage tank and the evaporation gas naturally generated from the liquefied gas.

본 발명은 상기한 바와 같은 종래의 문제점을 해결하기 위한 것으로서, 액화가스를 저장하고 있는 저장탱크에서 배출된 증발가스를, 대부분은 선박의 추진장치에서 연료로 사용하고 나머지 일부는 저장탱크로부터 새롭게 배출되는 증발가스의 냉열로 액화시켜 저장탱크로 복귀시킴으로써, 액화가스를 효율적으로 처리할 수 있도록 하는 액화가스 처리 시스템을 제공하고자 하는 것이다.SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and apparatus for recovering a liquefied gas from a storage tank, The liquefied gas can be efficiently treated by returning the liquefied gas to the storage tank by the cold heat of the evaporated gas.

상기 목적을 달성하기 위한 본 발명의 일 측면에 따르면, 액화가스를 저장하고 있는 저장탱크에서 배출되는 증발가스를 처리하는 액화가스 처리 시스템으로서, 상기 저장탱크 내에서 발생한 증발가스를 공급받아 압축하는 압축기와; 상기 압축기에서 압축된 증발가스를 냉각시키기 위한 열교환기와; 상기 열교환기에서 냉각된 증발가스의 압력을 감소시키기 위한 팽창수단; 을 포함하며, 상기 열교환기에서는 상기 압축기에서 압축된 증발가스와 상기 저장탱크에서 배출되어 상기 압축기에 공급되는 증발가스를 열교환시키는, 액화가스 처리 시스템이 제공된다.According to an aspect of the present invention, there is provided a liquefied gas processing system for processing an evaporated gas discharged from a storage tank storing a liquefied gas, comprising: a compressor for receiving and compressing evaporative gas generated in the storage tank; Wow; A heat exchanger for cooling the evaporated gas compressed in the compressor; Expansion means for reducing the pressure of the evaporated gas cooled in the heat exchanger; Wherein the heat exchanger exchanges heat between the evaporated gas compressed in the compressor and the evaporated gas discharged from the storage tank and supplied to the compressor.

상기 압축기는 다단압축기일 수 있다.The compressor may be a multi-stage compressor.

상기 압축기에 공급된 증발가스 중 일부는 다단압축되는 도중의 중간 단에서 분기하여 수요처에 공급되고, 나머지 증발가스는 상기 열교환기에 공급될 수 있다.Some of the evaporated gas supplied to the compressor may be branched at the middle stage of the multi-stage compression to be supplied to the customer, and the remaining evaporated gas may be supplied to the heat exchanger.

상기 열교환기에 공급되는 증발가스는, 상기 압축기의 최종 단까지 통과하여 압축된 증발가스일 수 있다.The evaporated gas supplied to the heat exchanger may be an evaporated gas compressed to pass through the final stage of the compressor.

상기 수요처는 천연가스를 연료로 사용하는 추진 시스템일 수 있다.The demander may be a propulsion system using natural gas as fuel.

상기 팽창수단을 통과하면서 감압되어 기액 혼합상태로 된 증발가스 중 기체 성분은, 상기 저장탱크로부터 배출되어 상기 압축기로 공급되는 증발가스에 합류될 수 있다.The gas component in the evaporated gas that has been reduced in pressure while passing through the expansion means and mixed in the gas-liquid mixed state may be merged into the evaporated gas discharged from the storage tank and supplied to the compressor.

상기 기체 성분은 또 다른 팽창수단을 통과하면서 더욱 감압된 후 상기 압축기로 공급되는 증발가스에 합류될 수 있다.The gaseous component may be further depressurized while passing through another expansion means and then joined to the evaporation gas supplied to the compressor.

상기 액화가스 처리 시스템은, 상기 팽창수단에 공급되는 액화된 증발가스를, 상기 팽창수단을 통과하면서 감압되어 기액 혼합상태로 된 증발가스 중 기체 성분과 열교환시켜 냉각시키기 위해 설치되는 냉각기를 더 포함할 수 있다.The liquefied gas processing system further includes a cooler installed to cool the liquefied evaporated gas supplied to the expanding means by heat exchange with the gas component in the evaporated gas that is reduced in pressure while passing through the expansion means .

상기 액화가스 처리 시스템은, 상기 팽창수단을 통과하면서 감압되어 기액 혼합상태로 된 증발가스 중 액체 성분만을 상기 저장탱크에 복귀시키기 위해 설치되는 기액분리기를 더 포함할 수 있다.The liquefied gas processing system may further include a gas-liquid separator installed to return only the liquid component of the evaporated gas, which is reduced in pressure while passing through the expansion means, into the storage tank.

상기 압축기는, 복수개의 압축 실린더와, 상기 압축 실린더에서 압축되면서 온도가 상승한 증발가스를 냉각시키기 위한 복수개의 중간 냉각기를 포함할 수 있다.The compressor may include a plurality of compression cylinders and a plurality of intermediate coolers for cooling the evaporated gas whose temperature has been increased while being compressed in the compression cylinder.

본 발명에 따르면, 액화가스를 저장하고 있는 저장탱크에서 배출된 증발가스를, 대부분은 선박의 추진장치에서 연료로 사용하고 나머지 일부는 저장탱크로부터 새롭게 배출되는 증발가스의 냉열로 액화시켜 저장탱크로 복귀시킬 수 있는 액화가스 처리 시스템이 제공될 수 있다.According to the present invention, the evaporation gas discharged from the storage tank storing the liquefied gas is mostly used as fuel in the propulsion device of the ship and the remaining part is liquefied by the cold heat of the evaporated gas newly discharged from the storage tank, It is possible to provide a liquefied gas processing system capable of returning the gas.

그에 따라 본 발명의 액화가스 처리 시스템에 의하면, 에너지 소모량이 많고 초기 설치비가 과도하게 소요되는 재액화 장치를 설치하지 않고도 저장탱크에서 발생되는 증발가스를 재액화시킬 수 있어, 재액화 장치에서 소모되는 에너지를 절감할 수 있게 된다.Therefore, according to the liquefied gas processing system of the present invention, it is possible to re-liquefy the evaporation gas generated in the storage tank without installing a re-liquefaction device which consumes a large amount of energy and requires an initial installation cost excessively, Energy can be saved.

또한 본 발명의 액화가스 처리 시스템에 의하면, 별도의 냉매를 사용하는 재액화 장치(즉, 질소냉매 냉동 사이클이나 혼합냉매 냉동 사이클 등)가 설치될 필요가 없으므로, 냉매를 공급 및 저장하기 위한 설비를 추가로 설치할 필요가 없어, 전체 시스템을 구성하기 위한 초기 설치비와 운용비용을 절감할 수 있다.Further, according to the liquefied gas processing system of the present invention, there is no need to provide a re-liquefying apparatus (that is, a nitrogen refrigerant refrigeration cycle, a mixed refrigerant refrigeration cycle, etc.) using a separate refrigerant, There is no need for additional installation, which can reduce the initial installation cost and operating cost of configuring the entire system.

또한 본 발명의 액화가스 처리 시스템에 의하면, 액화가스 운반선의 화물(예를 들어 LNG) 운반시 발생되는 모든 증발가스를, 엔진의 연료로서 사용하거나 재액화시켜 다시 저장탱크로 복귀시켜 저장할 수 있기 때문에, GCU 등에서 소모하여 버려지는 증발가스의 양을 감소시킬 수 있어, 자원 낭비를 방지할 수 있게 된다.Further, according to the liquefied gas processing system of the present invention, it is possible to use all of the evaporated gas generated when the cargo (for example, LNG) of the liquefied gas carrier is transported as fuel of the engine or to re- , GCU, etc., it is possible to reduce the amount of evaporated gas consumed and waste of resources can be prevented.

도 1은 본 발명의 바람직한 제1 실시예에 따른, 액화가스 처리 시스템을 도시한 개략 구성도, 그리고
도 2는 본 발명의 바람직한 제2 실시예에 따른, 액화가스 처리 시스템을 도시한 개략 구성도이다.1 is a schematic structural view showing a liquefied gas processing system according to a first preferred embodiment of the present invention, and Fig.
2 is a schematic configuration diagram showing a liquefied gas processing system according to a second preferred embodiment of the present invention.

일반적으로, 선박에서 배출되는 폐기가스 중 국제 해사 기구(International Maritime Organization)의 규제를 받고 있는 것은 질소산화물(NOx)과 황산화물(SOx)이며, 최근에는 이산화탄소(CO2)의 배출도 규제하려 하고 있다. 특히, 질소산화물(NOx)과 황산화물(SOx)의 경우, 1997년 해상오염 방지협약(MARPOL; The Prevention of Marine Pollution from Ships) 의정서를 통하여 제기되고, 8년이라는 긴 시간이 소요된 후 2005년 5월에 발효요건을 만족하여 현재 강제규정으로 이행되고 있다.In general, among the waste gases emitted from vessels, those regulated by the International Maritime Organization are nitrogen oxides (NOx) and sulfur oxides (SOx), and in recent years they have also been trying to regulate the emission of carbon dioxide (CO 2 ) have. Particularly, in the case of nitrogen oxide (NOx) and sulfur oxides (SOx), it was submitted through the Protocol of the Maritime Pollution Prevention Convention (MARPOL) in 1997, In May, the requirements for the fermentation were satisfied and the regulations are being implemented.

따라서, 이러한 규정을 충족시키기 위하여 질소산화물(NOx) 배출량을 저감하기 위해, 디젤유와 천연가스를 혼합하여 연료로서 사용하는 DF 엔진(예컨대 DFDG; Dual Fuel Diesel Generator)이 개발되어, 추진용이나 발전용으로 사용되고 있다. DF 엔진은 오일과 천연가스를 혼합연소하거나 오일과 천연가스 중 선택된 하나만을 연료로 사용할 수 있는 엔진으로서, 오일만을 연료로 사용하는 경우보다 연료에 포함된 황화합물이 적어 배기가스 중 황산화물의 함량이 적다.Therefore, in order to meet the above requirements, a DF engine (for example, DFDG: Dual Fuel Diesel Generator), which uses diesel oil and natural gas as a fuel, has been developed in order to reduce nitrogen oxide (NOx) . The DF engine is an engine that can mix oil and natural gas or use only one selected from oil and natural gas as fuel. The sulfur content in the exhaust gas is smaller than the sulfur content in the fuel, little.

DF 엔진은 MEGI 엔진과 같은 고압으로 연료가스를 공급할 필요가 없으며, 대략 수 내지 수십 bara 정도로 연료가스를 압축하여 공급하면 된다. DF 엔진은 엔진의 구동력에 의해 발전기를 구동시켜 전력을 얻고, 이 전력을 이용하여 추진용 모터를 구동시키거나 각종 장치나 설비를 운전한다. DFDE(혹은 DFDE 시스템)란 위와 같은 DF 엔진을 이용하여 동력을 얻는 추진 또는 발전 시스템을 의미한다.
The DF engine does not need to supply the fuel gas at a high pressure such as the MEGI engine, and can supply the fuel gas by compressing it to approximately several to several tens of bara. The DF engine obtains power by driving the generator by the driving force of the engine, and drives the propulsion motor or operates various devices or equipments by using this electric power. DFDE (or DFDE system) means a propulsion or power generation system that uses the above DF engine to get power.

이하 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대한 구성 및 작용을 상세히 설명하면 다음과 같다. 또한 하기 실시예는 여러 가지 다른 형태로 변형될 수 있으며, 본 발명의 범위가 하기 실시예에 한정되는 것은 아니다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following examples can be modified in various forms, and the scope of the present invention is not limited to the following examples.

도 1에는 본 발명의 바람직한 제1 실시예에 따른 액화가스 처리 시스템의 개략 구성도가 도시되어 있다.Fig. 1 shows a schematic configuration diagram of a liquefied gas processing system according to a first preferred embodiment of the present invention.

도 1에는, 천연가스를 연료로 사용할 수 있는 DF 엔진(즉, LNG를 연료로 사용하는 추진 시스템, 예를 들어 DFDE 추진 시스템)을 설치한 LNG 운반선에 본 발명의 액화가스 처리 시스템이 적용된 예가 도시되어 있지만, 본 발명의 증발가스 부분재액화 시스템은 액화가스 저장탱크가 설치된 모든 종류의 선박, 즉 LNG 운반선, LNG RV 등을 비롯하여, LNG FPSO, LNG FSRU, BMPP와 같은 플랜트에 적용될 수 있다.1 shows an example in which the liquefied gas processing system of the present invention is applied to an LNG carrier equipped with a DF engine capable of using natural gas as fuel (i.e., a propulsion system using LNG as fuel, for example, a DFDE propulsion system) The evaporative gas partial liquefaction system of the present invention can be applied to plants such as LNG FPSO, LNG FSRU and BMPP, as well as all kinds of ships equipped with liquefied gas storage tanks, namely LNG carriers, LNG RVs and the like.

본 발명의 제1 실시예에 따른 액화가스 처리 시스템에 따르면, 액화가스를 저장하는 저장탱크(11)에서 발생되어 배출된 증발가스(NBOG)는, 증발가스 공급라인(L1)을 따라 이송되어 압축기(13)에 공급된다. 압축기(13)는 다단 압축기일 수 있으며, 후술하는 바와 같이, 이 압축기에서 다단 압축되는 도중에 증발가스는 대략 7 bara 정도로 압축된 후 중간 단(즉, 최종 압축단계 이전의 단계)에서 분기되어 연료 공급라인(L2)을 따라 수요처, 즉 LNG를 연료로 사용하는 추진 시스템(예를 들어, DFDE)에 공급될 수 있다. DFDE에 공급되고 남는 증발가스는 압축기(13)에 의해 대략 100 내지 400 bara 정도의 고압으로 압축될 수 있으며, 그 다음, 후술하는 바와 같이, 증발가스 복귀라인(L3)을 따라 이동하면서 액화되어 저장탱크(11)에 복귀할 수 있다.According to the liquefied gas processing system according to the first embodiment of the present invention, the evaporation gas (NBOG) generated and discharged from the storage tank (11) storing the liquefied gas is conveyed along the evaporation gas supply line (L1) (13). The compressor 13 may be a multi-stage compressor, and as will be described below, during multi-stage compression in this compressor, the evaporation gas is compressed to about 7 bara and then branched in the middle stage (i.e., Along a line L2, to a propulsion system (e.g., DFDE) using a demand source, that is, an LNG as fuel. The evaporation gas supplied to and remaining in the DFDE can be compressed to a high pressure of about 100 to 400 bara by the compressor 13 and then liquefied and stored as it moves along the evaporation gas return line L3, And can return to the tank 11.

저장탱크는 LNG 등의 액화가스를 극저온 상태로 저장할 수 있도록 밀봉 및 단열 방벽을 갖추고 있지만, 외부로부터 전달되는 열을 완벽하게 차단할 수는 없다. 그에 따라 저장탱크(11) 내에서는 액화가스의 증발이 지속적으로 이루어지며, 증발가스의 압력을 적정한 수준으로 유지하기 위해 증발가스 배출라인(L1)을 통하여 저장탱크(11) 내부의 증발가스를 배출시킨다.The storage tank has a sealing and thermal barrier to store liquefied gases such as LNG in cryogenic conditions, but it can not completely block the heat transmitted from the outside. Accordingly, the evaporation of the liquefied gas is continuously performed in the storage tank 11, and the evaporation gas in the storage tank 11 is discharged through the evaporation gas discharge line L1 to maintain the pressure of the evaporation gas at an appropriate level .

저장탱크(11)의 내부에는 필요시 LNG를 저장탱크의 외부로 배출시키기 위해 배출 펌프(12)가 설치된다. 도시하지는 않았지만, 저장탱크(11)에서 배출되는 증발가스의 양이 DFDE에서 필요로 하는 연료의 양보다 적을 경우, LNG를 배출 펌프(12)에 의해 배출시킨 후 강제로 기화시킴으로써 증발가스를 생성하여 증발가스 공급라인(L1)을 통해 압축기(13)에 공급할 수 있다.A discharge pump (12) is installed in the storage tank (11) to discharge the LNG to the outside of the storage tank, if necessary. Although not shown, when the amount of the evaporated gas discharged from the storage tank 11 is smaller than the amount of the fuel required in the DFDE, the LNG is discharged by the discharge pump 12 and is forcedly vaporized to generate the evaporated gas Can be supplied to the compressor (13) through the evaporation gas supply line (L1).

압축기(13)는, 하나 이상의 압축 실린더(14)와, 압축되면서 온도가 상승한 증발가스를 냉각시키기 위한 하나 이상의 중간 냉각기(15)를 포함할 수 있다. 압축기(13)는 예를 들어 증발가스를 약 400 bara까지 압축하도록 구성될 수 있다. 도 1에서는 5개의 압축 실린더(14)와 5개의 중간 냉각기(15)를 포함하는 다단 압축의 압축기(13)가 예시되어 있지만, 압축 실린더와 중간 냉각기의 개수는 필요에 따라 변경될 수 있다. 또한, 하나의 압축기 내에 복수개의 압축 실린더가 배열된 구조 이외에, 복수개의 압축기를 직렬로 연결한 구조를 가지도록 변경될 수도 있다.The compressor 13 may include one or more compression cylinders 14 and one or more intercoolers 15 for cooling the evaporated gas as it is being compressed. The compressor 13 may be configured, for example, to compress the evaporation gas to about 400 bara. In FIG. 1, a multi-stage compression compressor 13 including five compression cylinders 14 and five intermediate coolers 15 is illustrated, but the number of compression cylinders and intercoolers can be changed as needed. Further, in addition to the structure in which a plurality of compression cylinders are arranged in one compressor, the structure may be changed to have a structure in which a plurality of compressors are connected in series.

압축기(13)의 중간 단, 예를 들어 2단 압축된 증발가스는 대략 7 bara 정도까지 압축된 후 분기되어 연료 공급라인(L2)을 통하여 수요처, 예를 들어 DF 엔진(즉, DFDE)에 공급되는데, 엔진에서 필요로 하는 연료의 필요량에 따라 증발가스 전부를 엔진에 공급할 수도 있고, 증발가스 중 일부만을 엔진에 공급할 수도 있다.The intermediate stage of the compressor 13, for example, the two-stage compressed evaporated gas is compressed to about 7 bara and then branched to supply to a customer, for example, a DF engine (i.e., DFDE) Depending on the required amount of fuel required by the engine, all of the evaporated gas may be supplied to the engine, or only a part of the evaporated gas may be supplied to the engine.

즉, 본 발명의 제1 실시예에 따르면, 저장탱크(11)로부터 배출되어 압축기(13)에 공급되는 증발가스(즉, 저장탱크에서 배출된 증발가스 전체)를 제1 스트림이라 할 때, 증발가스의 제1 스트림을 압축기(13) 내에서 제2 스트림과 제3 스트림으로 나누어, 제2 스트림은 DF 엔진(즉, DFDE)에 연료로서 공급하고 제3 스트림은 액화시켜 저장탱크로 복귀시키도록 구성할 수 있다.That is, according to the first embodiment of the present invention, when the evaporated gas discharged from the storage tank 11 and supplied to the compressor 13 (that is, the entire evaporated gas discharged from the storage tank) The first stream of gas is divided into a second stream and a third stream in compressor 13, the second stream is fed as fuel to the DF engine (i.e., DFDE) and the third stream is liquefied and returned to the storage tank Can be configured.

이때, 제2 스트림은 연료 공급라인(L2)을 통해 DFDE에 공급되고, 제3 스트림은 증발가스 복귀라인(L3)을 통해 저장탱크(11)로 복귀된다. 압축된 증발가스의 제3 스트림을 액화시킬 수 있도록 증발가스 복귀라인(L3)에는 열교환기(21)가 설치된다. 열교환기(21)에서는 압축된 증발가스의 제3 스트림을 저장탱크(11)로부터 배출된 후 압축기(13)로 공급되는 증발가스의 제1 스트림과 열교환시킨다.At this time, the second stream is supplied to the DFDE through the fuel supply line L2, and the third stream is returned to the storage tank 11 through the evaporation gas return line L3. A heat exchanger (21) is installed in the evaporation gas return line (L3) so that the third stream of the compressed evaporation gas can be liquefied. The heat exchanger 21 heat exchanges the third stream of the compressed evaporated gas with the first stream of the evaporated gas which is discharged from the storage tank 11 and then supplied to the compressor 13.

압축되기 전의 증발가스의 제1 스트림의 유량이 제3 스트림의 유량보다 많기 때문에, 압축된 증발가스의 제3 스트림은 압축되기 전의 증발가스의 제1 스트림으로부터 냉열을 공급받아 냉각(즉 적어도 부분적으로 액화)될 수 있다. 이와 같이 열교환기(21)에서는 저장탱크(11)로부터 배출된 직후의 극저온의 증발가스와 압축기(13)에서 압축된 고압 상태의 증발가스를 열교환시켜 이 고압 상태의 증발가스를 냉각(액화)시킨다.Because the flow rate of the first stream of evaporated gas before being compressed is greater than the flow rate of the third stream, the third stream of compressed evaporated gas is cooled (i.e., at least partially Liquefied). As described above, in the heat exchanger 21, the extremely low temperature evaporated gas immediately after being discharged from the storage tank 11 is exchanged with the evaporated gas in the high pressure state compressed by the compressor 13 to cool (liquefy) the evaporated gas in the high pressure state .

열교환기(21)에서 냉각된 증발가스(LBOG)는 팽창수단(22)(예를 들어, J-T 밸브 혹은 팽창기(expander))을 통과하면서 감압되고, 계속해서 기액 혼합상태로 기액분리기(23)에 공급된다. 팽창수단(22)을 통과하면서 LBOG는 대략 상압으로 감압(예컨대 300바에서 3바로 감압)될 수 있다. 액화된 증발가스는 기액분리기(23)에서 기체와 액체 성분이 분리되어, 액체성분, 즉 LNG는 증발가스 복귀라인(L3)을 통해 저장탱크(11)로 이송되고, 기체성분, 즉 증발가스는 증발가스 재순환라인(L5)을 통해 이송되어, 저장탱크(11)로부터 배출되어 압축기(13)로 공급되는 증발가스와 합류된다. 더욱 상세하게는, 증발가스 재순환라인(L5)은 기액분리기(23)의 상단으로부터 연장되어 증발가스 공급라인(L1)에서 열교환기(21)보다 상류측에 연결된다.The evaporated gas LBOG cooled in the heat exchanger 21 is reduced in pressure while passing through the expansion means 22 (for example, a JT valve or an expander), and is continuously supplied to the gas-liquid separator 23 . The LBOG can be reduced in pressure (for example, 3 bars at 300 bar) to approximately atmospheric pressure while passing through the expansion means 22. The liquefied evaporated gas is separated from the gas and liquid components in the gas-liquid separator 23, and the liquid component, that is, the LNG is transferred to the storage tank 11 through the evaporated gas return line L3, and the gas component, Is transferred through the evaporation gas recirculation line (L5) and merged with the evaporated gas discharged from the storage tank (11) and supplied to the compressor (13). More specifically, the evaporation gas recycle line L5 extends from the upper end of the gas-liquid separator 23 and is connected to the evaporation gas supply line L1 on the upstream side of the heat exchanger 21.

위에서는 설명의 편의상 열교환기(21)가 증발가스 복귀라인(L3)에 설치된 것으로 설명하였으나, 실제로 열교환기(21)에서는 증발가스 공급라인(L1)을 통해 이송되고 있는 증발가스의 제1 스트림과 증발가스 복귀라인(L3)을 통해 이송되고 있는 증발가스의 제3 스트림 사이에 열교환이 이루어지고 있으므로, 열교환기(21)는 증발가스 공급라인(L1)에 설치된 것이기도 하다.In the above description, the heat exchanger 21 is provided in the evaporation gas return line L3, but in the heat exchanger 21, the first stream of the evaporation gas being fed through the evaporation gas supply line L1 The heat exchanger 21 is installed in the evaporation gas supply line L1 since heat exchange is performed between the third stream of the evaporation gas being transferred through the evaporation gas return line L3.

증발가스 재순환라인(L5)에는 또 다른 팽창수단(24)(예를 들어, J-T 밸브 혹은 팽창기(expander), 이하 '제2 팽창수단(24)'이라 함)이 더 설치될 수 있으며, 그에 따라 기액분리기(23)로부터 배출된 기체 성분은 제2 팽창수단(24)을 통과하면서 감압될 수 있다. 이러한 제2 팽창수단(24)은, 기액분리기(23)의 내부압력을 조절하기 위해 사용될 수 있으며, 그에 따라 기액분리기(23)로부터 저장탱크(11)에 복귀하는 액체상태의 천연가스의 압력을 저장탱크의 내부압력보다 미세하게 고압으로 유지할 수 있게 된다. 그와 함께, 제2 팽창수단(24)은, 증발가스 재순환라인(L5)에 있어서 제2 팽창수단(24) 하류측의 압력을 조절함으로써, 기체상태의 천연가스가 증발가스 공급라인(L1)을 따라 이송되는 증발가스에 원활하게 합류될 수 있도록 할 수 있다.The evaporation gas recycle line L5 may be further provided with another expansion means 24 (for example, a JT valve or an expander, hereinafter referred to as a second expansion means 24) The gas component discharged from the gas-liquid separator 23 can be decompressed while passing through the second expansion means 24. This second expansion means 24 can be used to regulate the internal pressure of the gas-liquid separator 23 so that the pressure of the liquid natural gas returning from the gas-liquid separator 23 to the storage tank 11 It is possible to maintain the pressure of the storage tank at a higher level than the internal pressure of the storage tank. The second expansion means 24 adjusts the pressure on the downstream side of the second expansion means 24 in the evaporation gas recirculation line L5 so that the gaseous natural gas is supplied to the evaporation gas supply line L1, So that the gas can be smoothly joined to the evaporated gas being conveyed along the path.

또한 열교환기(21)에서 액화된 후 기액분리기(23)로 공급되는 증발가스의 제3 스트림과 기액분리기(23)에서 분리되어 증발가스 재순환라인(L5)을 통해 이송되는 기체 성분을 열교환시켜 제3 스트림을 더욱 냉각시킬 수 있도록 증발가스 재순환라인(L5)에는 냉각기(25)가 설치된다. 즉, 냉각기(25)에서는 고압 액체 상태의 증발가스를 저압 극저온 기체 상태의 천연가스로 추가 냉각시킨다.The third stream of the evaporated gas supplied to the gas-liquid separator 23 after being liquefied in the heat exchanger 21 is heat-exchanged with the gas component separated by the gas-liquid separator 23 and conveyed through the evaporation gas recycle line L5, The evaporator gas recycle line (L5) is equipped with a cooler (25) to further cool the stream. That is, in the cooler 25, the evaporation gas in the high-pressure liquid state is further cooled by the low-pressure ultra-low temperature gaseous natural gas.

여기에서, 설명의 편의상 냉각기(25)가 증발가스 재순환라인(L5)에 설치된 것으로 설명하였으나, 실제로 냉각기(25)에서는 증발가스 복귀라인(L3)을 통해 이송되고 있는 증발가스의 제3 스트림과 증발가스 재순환라인(L5)을 통해 이송되고 있는 기체 성분 사이에 열교환이 이루어지고 있으므로, 냉각기(25)는 증발가스 복귀라인(L3)에 설치된 것이기도 하다.Although the cooler 25 has been described as being installed in the evaporative gas recirculation line L5 for convenience of explanation, in the cooler 25 in reality, the third stream of the evaporative gas being fed through the evaporative gas return line L3, The cooler 25 is provided in the evaporation gas return line L3 since heat exchange is performed between the gas components being transferred through the gas recirculation line L5.

한편, 저장탱크(11)에서 발생하는 증발가스의 양이 DF 엔진에서 요구하는 연료량보다 많아 잉여의 증발가스가 발생할 것으로 예상되는 경우(예를 들어, 엔진 정지시나 저속 운항시 등)에는, 압축기(13)에서 단계적으로 압축되고 있는 도중의 증발가스를, 증발가스 분기라인(L7)을 통하여 분기시켜 증발가스 소비수단에서 사용한다. 증발가스 소비수단으로서는 천연가스를 연료로서 사용할 수 있는 GCU, 가스 터빈 등이 사용될 수 있다.On the other hand, when the amount of the evaporative gas generated in the storage tank 11 is larger than the amount of fuel required by the DF engine and it is expected that excess evaporative gas will be generated (for example, when the engine is stopped or at a low- 13) is branched in the evaporation gas branch line (L7) and used in the evaporation gas consumption means. As the evaporation gas consumption means, a GCU or a gas turbine which can use natural gas as fuel can be used.

이상 설명한 바와 같은 본 발명의 제1 실시예에 따른 천연가스 처리 시스템에 의하면, LNG 운반선의 화물(즉, LNG) 운반시 발생되는 증발가스를, 엔진의 연료로서 사용하거나 재액화시켜 다시 저장탱크로 복귀시켜 저장할 수 있기 때문에, GCU 등에서 소모하여 버려지는 증발가스의 양을 감소시키거나 없게 할 수 있게 되고, 질소 등 별도의 냉매를 사용하는 재액화 장치를 설치할 필요 없이 증발가스를 재액화하여 처리할 수 있게 된다.According to the natural gas processing system of the first embodiment of the present invention as described above, the evaporation gas generated during the transportation of the cargo (i.e., LNG) of the LNG carrier can be used as fuel for the engine or re- It is possible to reduce or eliminate the amount of evaporated gas consumed in the GCU or the like and to eliminate the need to provide a re-liquefying apparatus using a separate refrigerant such as nitrogen, .

또한 본 발명의 제1 실시예에 따른 천연가스 처리 시스템에 의하면, 별도의 냉매를 사용하는 재액화 장치(즉, 질소냉매 냉동 사이클이나 혼합냉매 냉동 사이클 등)가 설치될 필요가 없으므로, 냉매를 공급 및 저장하기 위한 설비를 추가로 설치할 필요가 없어, 전체 시스템을 구성하기 위한 초기 설치비와 운용비용을 절감할 수 있다.Further, according to the natural gas processing system of the first embodiment of the present invention, there is no need to provide a re-liquefying apparatus using a separate refrigerant (i.e., a nitrogen refrigerant refrigeration cycle or a mixed refrigerant refrigeration cycle) There is no need to install additional facilities for storing and storing data, and it is possible to reduce the initial installation cost and operating cost for constructing the entire system.

도 2에는 본 발명의 바람직한 제2 실시예에 따른 액화가스 처리 시스템의 개략 구성도가 도시되어 있다.Fig. 2 shows a schematic configuration diagram of a liquefied gas processing system according to a second preferred embodiment of the present invention.

제2 실시예에 따른 액화가스 처리 시스템은, 제1 실시예의 액화가스 처리 시스템과 비교해서, 냉각기(25)를 설치하지 않았다는 점에 있어서만 차이가 있으므로, 제1 실시예와 동일한 구성요소에는 동일한 부재번호를 부여하고 상세한 설명은 생략한다. 냉각기(25)를 설치하지 않을 경우 전체 시스템의 효율이 약간 저하될 수는 있지만, 배관의 배치와 시스템의 운용이 용이하고 냉각기의 초기 설치비 및 유지보수비가 절감되는 이점이 있다.The liquefied gas processing system according to the second embodiment is different from the liquefied gas processing system according to the first embodiment only in that the cooler 25 is not provided. And the detailed description thereof will be omitted. When the cooler 25 is not installed, the efficiency of the entire system may be slightly lowered. However, there is an advantage that the arrangement of piping and the operation of the system are easy, and the initial installation cost and the maintenance cost of the cooler are reduced.

한편, 도시하지는 않았지만, DF 엔진(DFDE)에서 요구하는 증발가스의 양이 자연적으로 발생하는 증발가스의 양보다 많을 경우, LNG를 강제로 기화시켜 사용할 수 있도록 시스템을 구성할 수 있다. 이를 위해, 저장탱크(11)에 저장된 LNG를 배출 펌프(12)에 의해 배출시킨 후 강제기화기(도시생략)에서 기화시켜 압축기(13)에 공급할 수 있도록 강제기화 라인(도시생략)을 구성한다. 이와 같이 강제기화 라인을 설치하면, 저장탱크에 저장되어 있는 LNG의 양이 적어 증발가스의 발생량이 적거나, 각종 엔진에서 요구하는 연료로서의 증발가스의 양이 자연적으로 발생하는 증발가스의 양보다 많은 경우에도 안정적으로 연료를 공급할 수 있게 된다.Meanwhile, although not shown, when the amount of the evaporation gas required by the DF engine (DFDE) is larger than the amount of the evaporation gas generated naturally, the system can be configured so that the LNG can be forcibly vaporized and used. For this purpose, a forced vaporization line (not shown) is configured so that the LNG stored in the storage tank 11 is discharged by the discharge pump 12 and then vaporized in a forced vaporizer (not shown) and supplied to the compressor 13. When the forced vaporization line is installed as described above, the amount of LNG stored in the storage tank is small and the amount of evaporated gas generated is small, or the amount of evaporated gas as fuel required by various engines is larger than the amount of evaporated gas naturally occurring It is possible to stably supply fuel.

또한, 도 1 및 도 2에는 압축기(13)가 5단 압축을 수행하는 것으로 도시하고 있지만, 이는 예시일 뿐이다. 압축기로서는 예를 들어 부카르트(Burckhardt) 사의 압축기를 사용할 수 있다. 부카르트 사의 압축기는 총 5개의 실린더를 포함하며, 전단 3개의 실린더는 무급유 윤활(oil-free) 방식으로 동작하고 후단 2개의 실린더는 급유 윤활(oil-lubricated) 방식으로 동작하는 것으로 알려져 있다. 따라서, 부카르트 사의 압축기를 BOG를 압축시키는 압축기(13)로 사용할 경우, 4단 이상에서 BOG를 분기시킬 때는 오일 필터를 거쳐 BOG가 이송되도록 구성할 필요가 있으나 3단 이하에서 분기시킬 때는 오일 필터를 사용할 필요가 없다는 점에서 유리할 수 있다.1 and 2 show that the compressor 13 performs five-stage compression, but this is only an example. As the compressor, for example, a compressor of Burckhardt can be used. The compressor of Bochard Inc. Comprises a total of five cylinders, the three cylinders in the front are operated in an oil-free manner and the two cylinders in the rear are operated in an oil-lubricated manner. Therefore, when the compressor of the subsidiary company is used as the compressor 13 for compressing the BOG, it is necessary to configure the BOG to be transferred through the oil filter when branching the BOG in four or more stages. However, It may be advantageous in that there is no need to use a filter.

본 발명에 따르면, 저장탱크의 용량이 커져 증발가스의 발생량은 많아지고 엔진의 성능이 개선되어 필요한 연료량은 감소하는 최근의 추세에도 불구하고, 엔진의 연료로서 사용하고 남는 증발가스는 재액화시켜 다시 저장탱크로 복귀시킬 수 있기 때문에 증발가스의 낭비를 막을 수 있게 된다.According to the present invention, despite the recent trend that the capacity of the storage tank is increased and the amount of evaporation gas is increased and the performance of the engine is improved and the amount of fuel required is decreased, the evaporation gas remaining as fuel of the engine is re- It is possible to return to the storage tank, thereby preventing waste of the evaporated gas.

본 명세서에서는, 압축기에서 다단압축되는 도중의 중간 단에서 분기된 증발가스를 공급받는 수요처는 천연가스를 연료로 사용하는 추진 시스템인 것으로 설명하고 있으며, 이 추진 시스템의 일례로서 DFDE를 들고 있다. 하지만, 본 발명은 DFDE 이외의, 천연가스(LNG)를 연료로 사용하는 추진 시스템에 적용될 수 있음은 물론이다.In the present specification, a customer who is supplied with evaporative gas branched at the middle stage in the course of multi-stage compression in the compressor is described as being a propulsion system that uses natural gas as a fuel, and DFDE is an example of the propulsion system. However, it goes without saying that the present invention can be applied to propulsion systems using natural gas (LNG) as a fuel other than DFDE.

본 발명은 상기 실시예에 한정되지 않고 본 발명의 기술적 요지를 벗어나지 아니하는 범위 내에서 다양하게 수정 또는 변형되어 실시될 수 있음은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 있어서 자명한 것이다.It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention will be.

11 : 저장탱크
12 : 배출펌프
13 : 압축기
14 : 압축 실린더
15 : 중간 냉각기
21 : 열교환기
22, 24 : 팽창수단
23 : 기액분리기
25 : 냉각기
L1 : 증발가스 공급라인
L2 : 연료 공급라인
L3 : 증발가스 복귀라인
L5 : 증발가스 재순환라인
L7 : 증발가스 분기라인11: Storage tank
12: Discharge pump
13: Compressor
14: Compression cylinder
15: Intermediate cooler
21: Heat exchanger
22, 24: expansion means
23: gas-liquid separator
25: Cooler
L1: Evaporative gas supply line
L2: fuel supply line
L3: Evaporative gas return line
L5: Evaporative gas recirculation line
L7: Evaporative gas branch line

Claims (9)

액화가스를 저장하고 있는 저장탱크에서 배출되는 증발가스를 처리하는 액화가스 처리 시스템으로서,
상기 저장탱크 내에서 발생한 증발가스를 공급받아 압축하는 압축기와;
상기 압축기에서 압축된 증발가스를 냉각시키기 위한 열교환기와;
상기 열교환기에서 냉각된 증발가스의 압력을 감소시키기 위한 팽창수단;
을 포함하며,
상기 열교환기에서는 상기 압축기에서 압축된 증발가스와 상기 저장탱크에서 배출되어 상기 압축기에 공급되는 증발가스를 열교환시키는, 액화가스 처리 시스템.1. A liquefied gas processing system for processing an evaporative gas discharged from a storage tank storing a liquefied gas,
A compressor for receiving and compressing evaporative gas generated in the storage tank;
A heat exchanger for cooling the evaporated gas compressed in the compressor;
Expansion means for reducing the pressure of the evaporated gas cooled in the heat exchanger;
/ RTI >
Wherein the heat exchanger exchanges heat between the evaporated gas compressed in the compressor and the evaporated gas discharged from the storage tank and supplied to the compressor. 청구항 1에 있어서,
상기 압축기는 다단압축기이며, 상기 압축기에 공급된 증발가스 중 일부는 다단압축되는 도중의 중간 단에서 분기하여 수요처에 공급되고, 나머지 증발가스는 상기 열교환기에 공급되는, 액화가스 처리 시스템.The method according to claim 1,
Wherein the compressor is a multi-stage compressor, and a part of the evaporated gas supplied to the compressor is branched at a middle stage in the multi-stage compression and supplied to the customer, and the remaining evaporated gas is supplied to the heat exchanger. 청구항 2에 있어서,
상기 열교환기에 공급되는 증발가스는, 상기 압축기의 최종 단까지 통과하여 압축된 증발가스인, 액화가스 처리 시스템.The method of claim 2,
Wherein the evaporated gas supplied to the heat exchanger is an evaporated gas compressed to pass through the final stage of the compressor. 청구항 2에 있어서,
상기 수요처는 천연가스를 연료로 사용하는 추진 시스템인, 액화가스 처리 시스템.The method of claim 2,
Wherein said customer is a propulsion system using natural gas as fuel. 청구항 1에 있어서,
상기 팽창수단을 통과하면서 감압되어 기액 혼합상태로 된 증발가스 중 기체 성분은, 상기 저장탱크로부터 배출되어 상기 압축기로 공급되는 증발가스에 합류되는, 액화가스 처리 시스템.The method according to claim 1,
Wherein the gas component in the evaporated gas that has been reduced in pressure while passing through the expansion means is mixed with the evaporated gas discharged from the storage tank and supplied to the compressor. 청구항 5에 있어서,
상기 기체 성분은 또 다른 팽창수단을 통과하면서 더욱 감압된 후 상기 압축기로 공급되는 증발가스에 합류되는, 액화가스 처리 시스템.The method of claim 5,
Wherein the gaseous component is further decompressed while passing through another expansion means and then merged into an evaporation gas supplied to the compressor. 청구항 1에 있어서,
상기 팽창수단에 공급되는 액화된 증발가스를, 상기 팽창수단을 통과하면서 감압되어 기액 혼합상태로 된 증발가스 중 기체 성분과 열교환시켜 냉각시키기 위해 설치되는 냉각기를 더 포함하는, 액화가스 처리 시스템.The method according to claim 1,
Further comprising a cooler installed to cool the liquefied evaporative gas supplied to the expanding means by heat exchange with a gas component of the evaporated gas which is reduced in pressure while passing through the expansion means and brought into a gas-liquid mixed state. 청구항 1에 있어서,
상기 팽창수단을 통과하면서 감압되어 기액 혼합상태로 된 증발가스 중 액체 성분만을 상기 저장탱크에 복귀시키기 위해 설치되는 기액분리기를 더 포함하는, 액화가스 처리 시스템.The method according to claim 1,
Further comprising a gas-liquid separator installed to return only the liquid component of the evaporated gas that has been reduced in pressure to the gas-liquid mixed state while passing through the expansion means, into the storage tank. 청구항 1에 있어서,
상기 압축기는, 복수개의 압축 실린더와, 상기 압축 실린더에서 압축되면서 온도가 상승한 증발가스를 냉각시키기 위한 복수개의 중간 냉각기를 포함하는, 액화가스 처리 시스템.The method according to claim 1,
Wherein the compressor comprises a plurality of compression cylinders and a plurality of intercoolers for cooling the evaporated gas whose temperature has risen while being compressed in the compression cylinder.
KR1020130122494A 2012-12-11 2013-10-15 System for treating a liquefied gas KR20140075579A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
KR1020140033793A KR101640768B1 (en) 2013-06-26 2014-03-24 Method for building a ship
KR1020140033792A KR101640765B1 (en) 2013-06-26 2014-03-24 System and method for treating boil-off gas for a ship
EP14816835.4A EP3015357B1 (en) 2013-06-26 2014-06-26 System and method for treating boil-off gas in ship
CN201480036272.5A CN105324302B (en) 2013-06-26 2014-06-26 Ship and boil-off gas processing system and method for ship
ES14816835.4T ES2674228T3 (en) 2013-06-26 2014-06-26 System and method of evaporation gas treatment on a ship
JP2016523648A JP6412565B2 (en) 2013-06-26 2014-06-26 Evaporative gas treatment system for ship and evaporative gas treatment method
SG11201510075VA SG11201510075VA (en) 2013-06-26 2014-06-26 System and method for treating boil-off gas in ship
RU2015153066A RU2628556C2 (en) 2013-06-26 2014-06-26 System and method for evaporating gas processing on the ship
PCT/KR2014/005672 WO2014209029A1 (en) 2013-06-26 2014-06-26 System and method for treating boil-off gas in ship
US14/895,201 US10518859B2 (en) 2013-06-26 2014-06-26 System and method for treating boil-off gas in ship
PL14816835T PL3015357T3 (en) 2013-06-26 2014-06-26 System and method for treating boil-off gas in ship
PH12015502846A PH12015502846A1 (en) 2013-06-26 2015-12-22 System and method for treating boil-off gas in ship

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120143522A KR20130139150A (en) 2012-12-11 2012-12-11 System and method for processing boil-off gas for a marine structure
KR1020120143522 2012-12-11

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR1020140034380A Division KR102227891B1 (en) 2012-12-11 2014-03-25 System for treating boil-off gas

Publications (1)

Publication Number Publication Date
KR20140075579A true KR20140075579A (en) 2014-06-19

Family

ID=49984552

Family Applications (3)

Application Number Title Priority Date Filing Date
KR1020120143522A KR20130139150A (en) 2012-10-24 2012-12-11 System and method for processing boil-off gas for a marine structure
KR1020130122494A KR20140075579A (en) 2012-12-11 2013-10-15 System for treating a liquefied gas
KR1020140034380A KR102227891B1 (en) 2012-12-11 2014-03-25 System for treating boil-off gas

Family Applications Before (1)

Application Number Title Priority Date Filing Date
KR1020120143522A KR20130139150A (en) 2012-10-24 2012-12-11 System and method for processing boil-off gas for a marine structure

Family Applications After (1)

Application Number Title Priority Date Filing Date
KR1020140034380A KR102227891B1 (en) 2012-12-11 2014-03-25 System for treating boil-off gas

Country Status (1)

Country Link
KR (3) KR20130139150A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170104345A (en) * 2016-03-07 2017-09-15 현대중공업 주식회사 liquefaction system of boil-off gas and ship having the same
WO2017160007A1 (en) * 2016-03-15 2017-09-21 김남국 Device for partially re-liquefying boil-off gas of liquefied natural gas for ship

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140352330A1 (en) 2013-05-30 2014-12-04 Hyundai Heavy Industries Co., Ltd. Liquefied gas treatment system
KR101519541B1 (en) * 2013-06-26 2015-05-13 대우조선해양 주식회사 BOG Treatment System
KR102025939B1 (en) * 2014-01-27 2019-09-26 한국조선해양 주식회사 A Treatment System Of Boil-Off Gas
CN103851854B (en) * 2014-02-10 2016-01-13 中船重工天禾船舶设备江苏有限公司 A kind of air-cooled cold storage plant peculiar to vessel
JP6389404B2 (en) * 2014-09-12 2018-09-12 川崎重工業株式会社 Gas supply system and ship equipped with the same
JP6516430B2 (en) 2014-09-19 2019-05-22 大阪瓦斯株式会社 Boil-off gas reliquefaction plant
KR101681720B1 (en) * 2014-12-10 2016-12-01 대우조선해양 주식회사 Control System for Treating Boil-Off Gas of a Ship
KR101637450B1 (en) * 2014-12-10 2016-07-07 대우조선해양 주식회사 Boil-Off Gas Treatment System For Ship
KR101681719B1 (en) * 2014-12-10 2016-12-01 대우조선해양 주식회사 Control System for Treating Boil-Off Gas of a Ship
KR101699326B1 (en) * 2014-12-18 2017-01-24 대우조선해양 주식회사 System for treating boil-off gas for a ship
KR102189751B1 (en) 2014-12-19 2020-12-11 삼성중공업 주식회사 System for supplying fuel gas in ships
KR101707509B1 (en) * 2014-12-23 2017-02-16 대우조선해양 주식회사 System and method for treating boil-off gas for a ship
KR102186045B1 (en) * 2014-12-29 2020-12-04 삼성중공업 주식회사 Apparatus for retreating boil off gas
JP6837049B2 (en) * 2015-07-08 2021-03-03 デウ シップビルディング アンド マリン エンジニアリング カンパニー リミテッド Ship with engine
KR101883466B1 (en) * 2016-10-07 2018-07-30 대우조선해양 주식회사 Boil Off Gas Processing System and Method of Ship
KR20210000342A (en) 2019-06-24 2021-01-05 삼성중공업 주식회사 Liquefied gas cooling system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090015458A (en) * 2007-08-08 2009-02-12 신영중공업주식회사 A bog re-liquefaction system and method for lng carrier
WO2009112478A1 (en) * 2008-03-10 2009-09-17 Burckhardt Compression Ag Device and method for preparing liquefied natural gas (lng) fuel
KR101106088B1 (en) * 2011-03-22 2012-01-18 대우조선해양 주식회사 Non-flammable mixed refrigerant using for reliquifaction apparatus in system for supplying fuel for high pressure natural gas injection engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170104345A (en) * 2016-03-07 2017-09-15 현대중공업 주식회사 liquefaction system of boil-off gas and ship having the same
WO2017160007A1 (en) * 2016-03-15 2017-09-21 김남국 Device for partially re-liquefying boil-off gas of liquefied natural gas for ship

Also Published As

Publication number Publication date
KR20130139150A (en) 2013-12-20
KR102227891B1 (en) 2021-03-16
KR20140075648A (en) 2014-06-19

Similar Documents

Publication Publication Date Title
KR102227891B1 (en) System for treating boil-off gas
KR101640768B1 (en) Method for building a ship
KR101386543B1 (en) System for treating boil-off gas for a ship
KR101566267B1 (en) System for treating boil-off gas of a marine structure
KR101356003B1 (en) System for treating boil-off gas for a ship
KR101512691B1 (en) System and method for liquefying hydrocarbon gas
KR20140075574A (en) Partial reliquefaction system of boil-off gas for a ship
KR20140138015A (en) Hybrid fuel supply system for a ship engine
KR101519537B1 (en) System for treating boil-off gas for a ship
KR101356004B1 (en) Method for treating boil-off gas for a ship
KR20140075570A (en) System for processing boil-off gas for a marine structure

Legal Events

Date Code Title Description
A201 Request for examination
A302 Request for accelerated examination
A107 Divisional application of patent