KR102297865B1 - Boil-off gas management system of the lng-fpso and the lng-fpso with the same - Google Patents

Boil-off gas management system of the lng-fpso and the lng-fpso with the same Download PDF

Info

Publication number
KR102297865B1
KR102297865B1 KR1020150012349A KR20150012349A KR102297865B1 KR 102297865 B1 KR102297865 B1 KR 102297865B1 KR 1020150012349 A KR1020150012349 A KR 1020150012349A KR 20150012349 A KR20150012349 A KR 20150012349A KR 102297865 B1 KR102297865 B1 KR 102297865B1
Authority
KR
South Korea
Prior art keywords
natural gas
unloading
storage
storage tank
liquefied natural
Prior art date
Application number
KR1020150012349A
Other languages
Korean (ko)
Other versions
KR20160091784A (en
Inventor
이수호
배재류
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 KR1020150012349A priority Critical patent/KR102297865B1/en
Publication of KR20160091784A publication Critical patent/KR20160091784A/en
Application granted granted Critical
Publication of KR102297865B1 publication Critical patent/KR102297865B1/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 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines
    • 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
    • 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
    • F17C2265/031—Treating the boil-off by discharge
    • 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
    • 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
    • F17C2265/07—Generating electrical power as side effect
    • 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
    • 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
    • F17C2270/0118—Offshore
    • F17C2270/0121—Platforms

Landscapes

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

Abstract

본 발명의 부유식 액화천연가스 생산저장하역시설은, 가스전으로부터 천연가스를 인입하는 가스인입시스템, 상기 가스인입시스템에 의해 인입된 천연가스를 전처리하는 전처리시스템, 상기 전처리시스템에 의해 전처리된 천연가스를 액화하는 액화시스템, 상기 액화시스템에 의해 액화된 액화천연가스를 저장하는 LNG 저장탱크 및 상기 LNG 저장탱크로부터 발생되는 증발가스(Boil-off gas, BOG)를 회수하여 저장하는 증발가스 처리시스템을 포함함으로써, 본 발명에 의하면, LNG 저장탱크에서 발생되는 BOG를 보다 효율적으로 회수 처리 가능한 부유식 액화천연가스 생산저장하역시설을 운용할 수 있다.The floating liquefied natural gas production, storage and unloading facility of the present invention includes a gas inlet system for introducing natural gas from a gas field, a pretreatment system for pretreating the natural gas introduced by the gas inlet system, and natural gas pretreated by the pretreatment system A liquefaction system that liquefies By including, according to the present invention, it is possible to operate a floating liquefied natural gas production, storage and unloading facility capable of more efficiently recovering and processing BOG generated in the LNG storage tank.

Description

부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템 및 이를 포함하는 부유식 액화천연가스 생산저장하역시설{BOIL-OFF GAS MANAGEMENT SYSTEM OF THE LNG-FPSO AND THE LNG-FPSO WITH THE SAME}BOG treatment system for floating liquefied natural gas production, storage and unloading facilities and floating liquefied natural gas production, storage and unloading facilities including the same

본 발명은 LNG(Liquefied Natural Gas) 저장 탱크로부터 발생되는 증발가스(Boil-off Gas, BOG)를 처리하기 위한 시스템과 방법으로서, 구체적으로는 부유식 액화천연가스 생산저장하역시설(LNG-FPSO, LNG-Floating, Production, Storage and Offloading)에서의 증발가스 처리 시스템 및 이를 포함하는 부유식 액화천연가스 생산저장하역시설에 관한 것이다.The present invention is a system and method for processing boil-off gas (BOG) generated from a LNG (Liquefied Natural Gas) storage tank, specifically, a floating liquefied natural gas production, storage and offloading facility (LNG-FPSO, It relates to a BOG treatment system in LNG-Floating, Production, Storage and Offloading) and a floating liquefied natural gas production, storage and unloading facility including the same.

환경적, 경제적 이유에 의해서 자연적으로 오일 이외에 천연 가스 자원의 개발에 관심이 증대되어 왔다.For environmental and economic reasons, there has been an increasing interest in the development of natural gas resources other than oil.

종래에 가스전으로부터의 천연가스는 해상플랫폼에 의해서 생산되어 파이프라인을 통해 육상으로 운송되고, 육상에서 육상 액화, 저장설비에 의해서 액화 및 저장되어, 저장된 액화천연가스(LNG, Liquefied natural gas)는 LNG 운반선(LNGC, LNG Carrier)에 의해서 수요처로 수출이 이루어지는 형태로 공급되어 왔다.
Conventionally, natural gas from a gas field is produced by an offshore platform and transported to land through a pipeline, and liquefied and stored on land by land liquefaction and storage facilities, and stored liquefied natural gas (LNG, Liquefied natural gas) is LNG. It has been supplied in the form of export to demand by carrier (LNGC, LNG Carrier).

근래에 들어 개발되어 제작되는 부유식 액화천연가스 생산저장하역시설(FLNG, LNG-FPSO, LNG-Floating, Production, Storage and Offloading)은 시추된 가스전으로부터 직접 천연가스를 인입, 생산하는 시설을 갖추고 있고, 이를 액화시켜 저장하는 설비 또한 갖추고 있는 선박이다.Floating liquefied natural gas production, storage and offloading facilities (FLNG, LNG-FPSO, LNG-Floating, Production, Storage and Offloading) that have been developed and manufactured in recent years are equipped with facilities that directly import and produce natural gas from drilled gas fields. , it is a ship equipped with facilities to liquefy and store it.

FLNG에는 하역시설 또한 갖추고 있어서, 생산 및 액화되어 저장된 액화천연가스는 해상에서 곧바로 LNG 운반선(LNGC, LNG Carrier)에 의해서 수요처로 수출이 이루어지는 형태로 공급될 수 있게 하므로, FLNG에 의하면 육상에 액화, 저장설비의 구축이 필요없고, 해상에서 육상까지의 긴 파이프라인이 필요없게 된다.
FLNG also has loading and unloading facilities, so that the liquefied natural gas produced and liquefied and stored can be supplied directly from the sea in the form of export to demand by LNG carriers (LNGC, LNG Carrier). There is no need to build a storage facility, and a long pipeline from sea to land is not required.

한편, 천연가스의 액화온도는 상압에서 약 -163℃의 극저온이므로, LNG는 그 온도가 상압에서 -163℃ 보다 약간만 높아도 증발된다. LNG 재기화 설비가 마련된 LNG RV (Regasification Vessel)와 같은 선박이나 LNG FSRU (Floating Storage and Regasification Unit)와 같은 해상 구조물 이외에 FLNG나 LNGC와 같이 LNG를 LNG 저장탱크에 의해 저장하는 선박의 경우에는, LNG 저장탱크가 단열처리가 되어 있기는 하지만, 외부의 열이 LNG에 지속적으로 전달되므로, LNG를 저장 또는 수송하는 도중에 LNG가 LNG 저장탱크 내에서 지속적으로 기화되어 LNG 저장 탱크 내에 증발가스(Boil-Off Gas)가 발생한다.On the other hand, 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. In the case of ships that store LNG by LNG storage tanks, such as FLNG or LNGC, in addition to ships such as LNG Regasification Vessels (RVs) equipped with LNG regasification facilities or offshore structures such as LNG FSRUs (Floating Storage and Regasification Units), Although the storage tank is insulated, external heat is continuously transferred to the LNG, so the LNG is continuously vaporized in the LNG storage tank during storage or transportation of LNG and boil-off gas in the LNG storage tank. gas) is generated.

이렇게 LNG 저장 탱크 내에서 지속적으로 증발가스가 발생하면, LNG 저장탱크의 압력이 상승하여 위험하게 된다.
If boil-off gas is continuously generated in the LNG storage tank in this way, the pressure in the LNG storage tank rises and becomes dangerous.

도1은 종래의 부유식 액화천연가스 생산저장하역시설(FLNG)의 천연가스 및 증발가스의 처리시스템을 개략적으로 도시한 것이다.1 schematically shows a processing system for natural gas and boil-off gas of a conventional floating liquefied natural gas production, storage and offloading facility (FLNG).

도시된 바와 같이, 종래에는 이러한 증발가스를 LNG 저장탱크의 압력을 안전한 상태로 유지하기 위해서 LNG를 연료로 하는 발전기관(1)에서 소비시키고, 소비되지 못하고 남은 양은 외기배출장치(Vent,2)를 통해 연소시켰다. 그렇지 않으면, 별도의 재액화장치(3)를 통해서 재액화한 후 다시 LNG 저장탱크(4)에 저장하여 처리하였다.As shown, conventionally, in order to maintain the pressure of the LNG storage tank in a safe state, such BOG is consumed by the power generation engine 1 using LNG as fuel, and the remaining amount that is not consumed is the outdoor air exhaust device (Vent, 2). burned through. Otherwise, it was re-liquefied through a separate re-liquefaction device (3) and then stored in the LNG storage tank (4) again for processing.

즉, 탱크 내의 LNG 온도를 -163℃ 내외에서 거의 상압 (ambient pressure)을 유지, 거의 동일한 온도와 동일한 압력으로 유지하는 것을 기본 개념으로 하고 있기 때문에 발생하는 BOG를 외부로 배출하여 처리하고 있었다.In other words, since the basic concept is to maintain the LNG temperature in the tank at ambient pressure at around -163°C and at almost the same temperature and the same pressure, the generated BOG was discharged to the outside and treated.

그러나, LNG 저장탱크에서 발생된 증발가스를 선박 구동용 스팀 터빈에서 연료로서 사용하는 경우에는 추진 효율이 낮은 문제점이 있었다.However, when the boil-off gas generated from the LNG storage tank is used as a fuel in a steam turbine for driving a ship, there is a problem in that the propulsion efficiency is low.

또한, LNG 저장탱크에서 발생된 증발가스를 압축하여 디젤 엔진의 연료로 사용하는 이중 연료 디젤 전기 추진 시스템(dual fuel diesel electric propulsion system)은, 스팀 터빈 추진 방식에 비해 효율은 높아지나 중속 엔진과 전기 추진 장치가 복잡하여 장비의 유지 보수에 많은 어려움이 있었다.In addition, the dual fuel diesel electric propulsion system, which compresses the boil-off gas generated in the LNG storage tank and uses it as fuel for a diesel engine, has higher efficiency than the steam turbine propulsion method, but Because the propulsion device was complicated, there were many difficulties in the maintenance of the equipment.

또한, 이러한 방식은 증발가스를 연료로 공급해야 하므로 액체압축에 비해 설치비 및 운전비가 큰 기체압축 방법이 적용될 수밖에 없었다. 그리고, 이렇게 증발가스를 추진용 연료로서 사용하는 방식은, 어떠한 경우에도 일반선박에 사용되는 2행정 저속 디젤 엔진의 효율에는 미치지 못한다.In addition, since this method has to supply boil-off gas as fuel, a gas compression method having a higher installation and operating cost than liquid compression was inevitably applied. And, this method of using boil-off gas as a fuel for propulsion does not reach the efficiency of a two-stroke low-speed diesel engine used in general ships in any case.

또 다른 방법으로, LNG 저장탱크에서 발생된 증발가스를 재액화하여 다시 LNG 저장탱크로 복귀시키는 방식은 복잡한 시스템의 증발가스 재액화 장치를 설치해야 하는 문제점이 있었다.As another method, the method of re-liquefying the boil-off gas generated in the LNG storage tank and returning it to the LNG storage tank has a problem in that a complex system of boil-off gas re-liquefaction device must be installed.

그리고, 추진 장치에서 연료로 사용할 수 있거나 증발가스 재액화 장치에서 처리할 수 있는 양 이상의 증발 가스가 발생하는 경우에는, 잉여의 증발가스를 가스 연소기나 플레어 등에서 소각 또는 방출하여 처리해야 하므로, 잉여의 증발가스의 처리를 위한 가스 연소기나 플레어 등의 별도의 장비들이 추가되는 문제점도 있었다.In addition, when the amount of BOG that can be used as fuel in the propulsion device or that can be processed by the BOG reliquefaction device is generated, the surplus BOG must be incinerated or discharged in a gas burner or flare to process the excess BOG. There was also a problem in that additional equipment such as a gas burner or flare for the treatment of boil-off gas was added.

1. 한국 공개특허공보 제10-2010-0047387호1. Korean Patent Publication No. 10-2010-0047387 2. 한국 등록특허공보 제10-1413544호2. Korean Patent Publication No. 10-1413544 3. 한국 공개특허공보 제10-2013-0052937호3. Korean Patent Publication No. 10-2013-0052937 4. 한국 공개특허공보 제10-2009-0117336호4. Korean Patent Publication No. 10-2009-0117336

본 발명은 상술한 문제점을 해결하고자 안출된 것으로서, 본 발명은 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크에서 발생되는 BOG를 보다 효율적으로 회수 처리하기 위한 시스템 및 이를 포함하는 부유식 액화천연가스 생산저장하역시설을 제공하는 데 그 목적이 있다.The present invention has been devised to solve the above problems, and the present invention is a system for more efficiently recovering and processing BOG generated from an LNG storage tank of a floating liquefied natural gas production, storage and offloading facility, and a floating liquefied natural gas including the same The purpose is to provide a gas production, storage and unloading facility.

본 발명에 따른 부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템은, 가스전으로부터 생산되는 천연가스를 액화하여, 저장 및 하역하는 부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템에 있어서, 상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크로부터 발생되는 증발가스(Boil-off gas, BOG)를 회수하여 저장하는 것을 특징으로 한다.The BOG treatment system of a floating liquefied natural gas production, storage and unloading facility according to the present invention is a BOG treatment system of a floating liquefied natural gas production, storage and unloading facility that liquefies, stores and unloads natural gas produced from a gas field. , It is characterized in that the boil-off gas (BOG) generated from the LNG storage tank of the floating liquefied natural gas production, storage and offloading facility is recovered and stored.

이는 상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크로부터 발생되는 증발가스를 압축하기 위한 제1 압력조절장치 및 상기 제1 압력조절장치에 의해 압축된 압축천연가스를 저장하기 위한 압축천연가스 저장탱크(CNG Storage tank)에 의해 가능하다.This is a first pressure regulating device for compressing boil-off gas generated from the LNG storage tank of the floating liquefied natural gas production, storage and offloading facility, and compressed natural gas for storing the compressed natural gas compressed by the first pressure regulating device. It is possible by a CNG storage tank.

또한, 상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크로부터 발생되는 증발가스를 연료로 소모시키기 위한 발전기관 및 상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크로부터 발생되는 증발가스를 외부로 배출시키기 위한 외기배출장치를 더 포함할 수 있다.In addition, the power generation engine for consuming the boil-off gas generated from the LNG storage tank of the floating LNG production, storage and offloading facility as fuel and the boil-off gas generated from the LNG storage tank of the floating LNG production, storage and offloading facility. It may further include an outdoor air exhaust device for discharging to the outside.

그리고, 상기 압축천연가스 저장탱크는 자체 하역 가능하여, CNG 운반선으로 하역되는 것을 보다 구체적인 특징으로 한다.In addition, the compressed natural gas storage tank is capable of unloading itself, and it is characterized in that it is unloaded by a CNG carrier.

아울러, 상기 부유식 액화천연가스 생산저장하역시설의 액화시스템 후단에 마련되는 제2 압력조절장치를 더 포함하여, 상기 제2 압력조절장치에 의해 압축된 압축천연가스는 상기 압축천연가스 저장탱크에 저장되는 것을 또한 특징으로 한다.In addition, further comprising a second pressure regulating device provided at the rear end of the liquefaction system of the floating liquefied natural gas production, storage and offloading facility, the compressed natural gas compressed by the second pressure regulating device is stored in the compressed natural gas storage tank. It is also characterized in that it is stored.

상기 제2 압력조절장치는 상기 액화시스템에 의해 액화되지 않은 잔류 천연가스를 압축하거나 상기 액화시스템을 거치지 않고 전처리시스템의 후단에 직접 연결되어 천연가스를 공급받아 압축할 수도 있다.The second pressure regulating device may compress the residual natural gas not liquefied by the liquefaction system or may be directly connected to the rear end of the pretreatment system without going through the liquefaction system to receive and compress the natural gas.

또한, 상기 압축천연가스 저장탱크에 저장된 압축천연가스를 CNG 운반선에 하역하기 위한 CNG 하역장치를 더 포함할 수 있다.In addition, it may further include a CNG unloading device for loading and unloading the compressed natural gas stored in the compressed natural gas storage tank to the CNG carrier.

여기서, 상기 CNG 하역장치는 상기 부유식 액화천연가스 생산저장하역시설의 좌현 또는 우현의 어느 일 측에 배치되는 것을 특징으로 한다.Here, the CNG unloading device is characterized in that it is disposed on either side of the port or starboard of the floating liquefied natural gas production, storage and unloading facility.

그리고, 상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크에 저장된 액화천연가스를 LNG 운반선에 하역하기 위한 LNG 하역장치는, 선현(船舷) 중 상기 CNG 하역장치가 배치되는 측과 다른 측에 배치되는 것을 추가적인 특징으로 한다.And, the LNG unloading device for loading and unloading the liquefied natural gas stored in the LNG storage tank of the floating LNG production, storage and offloading facility to the LNG carrier is disposed on the other side of the shipboard than the side where the CNG unloading device is disposed. to be an additional feature.

상기 CNG 하역장치는 운반선의 CNG 추진연료저장탱크에 직접 하역할 수도 있다.The CNG unloading device may directly unload the CNG propulsion fuel storage tank of the carrier.

한편, 상기 제1 압력조절장치에 의해 압축된 압축천연가스는, 상기 부유식 액화천연가스 생산저장하역시설의 액화시스템으로 재순환되는 것을 또 다른 특징으로 한다.
On the other hand, it is another feature that the compressed natural gas compressed by the first pressure regulating device is recycled to the liquefaction system of the floating liquefied natural gas production, storage and offloading facility.

본 발명에 따른 부유식 액화천연가스 생산저장하역시설은, 가스전으로부터 천연가스를 인입하는 가스인입시스템, 상기 가스인입시스템에 의해 인입된 천연가스를 전처리하는 전처리시스템, 상기 전처리시스템에 의해 전처리된 천연가스를 액화하는 액화시스템, 상기 액화시스템에 의해 액화된 액화천연가스를 저장하는 LNG 저장탱크 및 상기 LNG 저장탱크로부터 발생되는 증발가스(Boil-off gas, BOG)를 회수하여 저장하는 증발가스 처리시스템을 포함한다.The floating liquefied natural gas production, storage and unloading facility according to the present invention includes a gas inlet system for introducing natural gas from a gas field, a pretreatment system for pretreating the natural gas introduced by the gas inlet system, and the natural gas pretreated by the pretreatment system. A liquefaction system for liquefying gas, an LNG storage tank for storing liquefied natural gas liquefied by the liquefaction system, and a boil-off gas treatment system for recovering and storing boil-off gas (BOG) generated from the LNG storage tank includes

상기 증발가스 처리시스템은, 상기 LNG 저장탱크로부터 발생되는 증발가스를 압축하기 위한 제1 압력조절장치 및 상기 제1 압력조절장치에 의해 압축된 압축천연가스를 저장하기 위한 압축천연가스 저장탱크(CNG Storage tank)를 포함하는 것을 특징으로 한다.The BOG treatment system includes a first pressure regulating device for compressing BOG generated from the LNG storage tank and a compressed natural gas storage tank (CNG) for storing compressed natural gas compressed by the first pressure regulating device. It is characterized in that it includes a storage tank).

그리고, 상기 압축천연가스 저장탱크는 자체 하역 가능하여, CNG 운반선으로 하역되는 것을 보다 구체적인 특징으로 한다.In addition, the compressed natural gas storage tank is capable of unloading itself, and it is characterized in that it is unloaded by a CNG carrier.

또한, 상기 증발가스 처리시스템은 상기 액화시스템 후단에 마련되는 제2 압력조절장치를 더 포함하여, 상기 제2 압력조절장치에 의해 압축된 압축천연가스는 상기 압축천연가스 저장탱크에 저장되는 것을 추가적인 특징으로 한다.In addition, the BOG treatment system further includes a second pressure regulating device provided at the rear end of the liquefaction system, so that the compressed natural gas compressed by the second pressure regulating device is stored in the compressed natural gas storage tank. characterized.

아울러, 상기 증발가스 처리시스템은 상기 압축천연가스 저장탱크에 저장된 압축천연가스를 CNG 운반선에 하역하기 위한 CNG 하역장치를 더 포함하고, 상기 CNG 하역장치는 좌현 또는 우현의 어느 일 측에 배치될 수 있다.In addition, the BOG treatment system further includes a CNG unloading device for loading and unloading the compressed natural gas stored in the compressed natural gas storage tank to a CNG carrier, and the CNG unloading device may be disposed on either side of port or starboard. .

그리고, 상기 제1 압력조절장치에 의해 압축된 압축천연가스는 상기 액화시스템으로 재순환되는 것을 또 다른 특징으로 한다.And, it is another feature that the compressed natural gas compressed by the first pressure control device is recirculated to the liquefaction system.

본 발명의 부유식 액화천연가스 생산저장하역시설의 증발가스 처리 시스템 및 이를 포함하는 부유식 액화천연가스 생산저장하역시설에 의하면,According to the BOG treatment system of the floating liquefied natural gas production, storage and unloading facility of the present invention and the floating liquefied natural gas production, storage and unloading facility including the same,

부유식 액화천연가스 생산저장하역시설에서 별도의 재액화장치를 구비할 필요가 없다.There is no need to provide a separate re-liquefaction device in the floating liquefied natural gas production, storage and unloading facility.

그리고, 발생하는 증발가스를 압축천연가스(CNG, Compressed Natural Gas)의 형태로 전용탱크에 저장함으로써 LNG 저장탱크에서 발생되는 BOG를 전량 회수할 수 있게 된다.And, by storing the generated boil-off gas in a dedicated tank in the form of compressed natural gas (CNG), it is possible to recover the entire amount of BOG generated in the LNG storage tank.

회수된 CNG는 연료추진 선박에 직접 공급되게 하거나 CNG 운반선을 통해 근거리의 연안역, 도서 지역 등에 위치한 수요지에 직접 공급되게 할 수 있고, 수요지에서는 재기화시설을 구축할 필요가 없어 보다 경제적이다.Recovered CNG can be directly supplied to fuel-propelled ships or directly supplied to demanding sites located near coastal stations and island areas through CNG carriers.

도 1은 종래의 부유식 액화천연가스 생산저장하역시설에서 천연가스 및 증발가스의 처리를 도식화한 것이다.
도 2는 본 발명의 부유식 액화천연가스 생산저장하역시설 및 이를 구성하는 증발가스 처리시스템의 일 실시예를 도시한 것이다.
도 3 내지 도 5는 본 발명의 부유식 액화천연가스 생산저장하역시설 및 이를 구성하는 증발가스 처리시스템의 응용 실시예를 도시한 것이다.1 is a schematic view of the treatment of natural gas and boil-off gas in a conventional floating liquefied natural gas production, storage and unloading facility.
2 shows an embodiment of the floating liquefied natural gas production, storage and unloading facility of the present invention and the boil-off gas treatment system constituting the same.
3 to 5 show an application embodiment of the floating liquefied natural gas production, storage and unloading facility of the present invention and the boil-off gas treatment system constituting the same.

본 발명과 본 발명의 동작상의 이점 및 본 발명의 실시에 의하여 달성되는 목적을 충분히 이해하기 위해서는 본 발명의 바람직한 실시 예를 예시하는 첨부 도면 및 첨부 도면에 기재된 내용을 참조하여야만 한다.In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

이하에서 본 발명에 따른 실시예를 도면을 참조하여 설명하기로 한다.
Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

도 2는 본 발명의 일 실시예에 따른 부유식 액화천연가스 생산저장하역시설 및 이를 구성하는 증발가스 처리시스템을 도시한 것이다.2 shows a floating liquefied natural gas production, storage and unloading facility and a boil-off gas treatment system constituting the same according to an embodiment of the present invention.

도 2를 참조하면, 본 발명의 일 실시예에 따른 부유식 액화천연가스 생산저장하역시설(100)은, 가스인입시스템(110), 전처리시스템(120), 액화시스템(130), LNG 저장탱크(140) 및 증발가스 처리시스템을 포함한다.Referring to FIG. 2 , the floating liquefied natural gas production, storage and unloading facility 100 according to an embodiment of the present invention includes a gas inlet system 110 , a pretreatment system 120 , a liquefaction system 130 , and an LNG storage tank. (140) and a boil-off gas treatment system.

부유식 액화천연가스 생산저장하역시설에서의 가스인입시스템(110)은 해저로부터 가스를 인입하기 위한 수단을 포함함으로써, 해저 가스전으로부터 천연가스를 인입하여 선박으로 끌어올리기 위한 시스템이다.The gas inlet system 110 in the floating liquefied natural gas production, storage and offloading facility includes a means for introducing gas from the seabed, and is a system for introducing natural gas from a seabed gas field and pulling it up to a ship.

그리고, 전처리시스템(120)은 가스인입시스템(110)에 의해서 인입한 천연가스를 액화공정을 거치기 전 수소, 물, 머드(mud) 및 절단물(driliing cuttings) 등을 분리하는 등으로 전처리하여 정제하는 과정을 수행하는 시스템이다.In addition, the pretreatment system 120 pre-treats and refines the natural gas introduced by the gas introduction system 110 by separating hydrogen, water, mud, and drilling cuttings before going through a liquefaction process. It is a system that carries out the process.

다음으로 액화시스템(130)은 인입된 천연가스를 액화천연가스로서 저장하기 위해서 압축, 응축, 팽창, 열교환 등의 액화사이클을 위한 시스템이다.Next, the liquefaction system 130 is a system for a liquefaction cycle such as compression, condensation, expansion, and heat exchange in order to store the introduced natural gas as liquefied natural gas.

이렇게 액화된 천연가스는 LNG 저장탱크(140)에 저장되고, 저장된 액화천연가스는 LNG 운반선에 하역하므로써 수요처에 공급되게 한다.
The liquefied natural gas is stored in the LNG storage tank 140 , and the stored liquefied natural gas is unloaded on an LNG carrier so that it is supplied to a consumer.

본 발명의 부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템은 LNG 저장탱크(140)에서 필연적으로 발생되는 증발가스(Boil-off gas, BOG)를 회수하여 처리하기 위한 시스템이다.The boil-off gas treatment system of the floating liquefied natural gas production, storage and unloading facility of the present invention is a system for recovering and processing boil-off gas (BOG) that is inevitably generated in the LNG storage tank 140 .

본 발명의 일 실시예에 의한 증발가스 처리시스템은, 제1 압력조절장치(10), 압축천연가스 저장탱크(20), 제2 압력조절장치(11)를 포함하고, 발전기관(30) 및 외기배출장치(40)를 더 포함할 수 있다.The BOG treatment system according to an embodiment of the present invention includes a first pressure regulating device 10 , a compressed natural gas storage tank 20 , and a second pressure regulating device 11 , and a power generation engine 30 and It may further include an outdoor air exhaust device (40).

제1 압력장치(10)는 LNG 저장탱크(140)로부터 발생되는 증발가스(BOG)를 압축시키기 위한 것이다.The first pressure device 10 is for compressing boil-off gas (BOG) generated from the LNG storage tank 140 .

본 발명의 일 실시예에 의한 증발가스 처리시스템은 발생되는 증발가스를 재액화시키지 않고, 압력조절장치에 의해서 압축시켜서 처리하게 한다.The boil-off gas treatment system according to an embodiment of the present invention does not re-liquefy the generated boil-off gas, but compresses and processes the boil-off gas by a pressure control device.

이러한 압력조절장치는 발생되는 증발가스를 탱크 인입부의 요구 압력에 맞춰서 압력을 높임으로써, 증발가스를 압축천연가스(Compressed natural gas, CNG)로 변형시킨다.Such a pressure regulator transforms the boil-off gas into compressed natural gas (CNG) by increasing the pressure of the generated boil-off gas according to the required pressure of the tank inlet.

압축천연가스 저장탱크의 요구 압력은 대략 150 bar 내지 350 bar이고, 250 bar 내지 300 bar로 가압하는 것이 바람직하다.The required pressure of the compressed natural gas storage tank is approximately 150 bar to 350 bar, and it is preferable to pressurize it to 250 bar to 300 bar.

이렇게 가압된 압축천연가스는 이를 저장하기 위한 압축천연가스 저장탱크(CNG Storage tank, 20)에 저장되게 하고, 이를 CNG 운반선(C)에 하역함으로써 CNG 형태의 천연가스를 근거리에 위한 연악역이나 도서지역 등의 수요처로 운송될 수 있게 하고, 수요처에서는 이를 다시 기화시킬 필요없이 저장 및 사용될 수 있게 함으로써 육상설비도 간소화를 도모할 수 있다.This pressurized natural gas is stored in a compressed natural gas storage tank (CNG storage tank, 20) for storing it, and by loading it on a CNG carrier (C), the CNG type natural gas is stored in the Yeonak station or island for a short distance. By enabling it to be transported to a demanding place such as an area, and storing and using it without the need to re-vaporize it in the demanding place, the onshore facility can also be simplified.

이를 위한 압축천연가스 저장탱크(20)는 압축된 천연가스를 저장할 수 있도록 고압전용 탱크인 것이 바람직하다.The compressed natural gas storage tank 20 for this purpose is preferably a high-pressure dedicated tank to store the compressed natural gas.

이러한 압축천연가스 저장탱크(20)는 도시와 같이 자체적으로 이동이 가능하도록 마련됨으로써, 각 탱크 단위로 CNG 운반선(C)에 하역될 수 있게 마련될 수 있다.The compressed natural gas storage tank 20 is provided to be movable by itself, as shown in the figure, so that it can be provided to be unloaded onto the CNG carrier C in units of each tank.

본 발명의 증발가스 처리시스템은 발생된 증발가스를 가압 후 전용탱크에 저장하고 이를 하역함으로써 전량 회수가 가능하게 하며, 경우에 따라서는 이를 모두 하역하지 않고 부유식 액화천연가스 생산저장하역시설에서 처리하는 것도 가능하다.The BOG treatment system of the present invention enables the total amount to be recovered by storing the BOG after pressurization and unloading it in a dedicated tank. It is also possible to

즉, 필요에 따라 발전기관(30)에 의해서 증발가스를 연료로 소모할 수 있게 하거나, 외기배출장치(40)에 의해서 증발가스를 외부로 배출시키도록 구현시킬 수도 있다.That is, if necessary, the BOG may be consumed as fuel by the power generation engine 30 or may be implemented to discharge the BOG to the outside by the outdoor air exhaust device 40 .

발전기관(30)은 증발가스를 추진연료로서 사용하여 선박을 추진시킬 수 있게 하는 것이고, 이를 발전용으로도 사용 가능할 것이다.The power generation engine 30 is to use the boil-off gas as a propulsion fuel to propel the vessel, and it will also be available for power generation.

그리고, 외기배출장치(40)는 증발가스를 연소시켜서 선박 외부로 배출시키게 된다.And, the outdoor air exhaust device 40 burns the boil-off gas and discharges it to the outside of the ship.

제2 압력조절장치(11)는 액화시스템(130) 후단에 마련되고, 상기 액화시스템(130)에 의해 액화되지 않은 잔류 천연가스를 압축하거나 상기 액화시스템(130)을 거치지 않고 전처리시스템(120)의 후단에 직접 연결되어 천연가스를 공급받아 압축할 수도 있다.
The second pressure control device 11 is provided at the rear end of the liquefaction system 130 and compresses the residual natural gas not liquefied by the liquefaction system 130 or pre-treatment system 120 without going through the liquefaction system 130 . It can be directly connected to the rear end of the tube to receive natural gas and compress it.

본 발명의 증발가스처리시스템은 이와 같이 구성됨에 의해서, 필요에 따라 액화천연가스와 압축천연가스의 생산량을 조절하여 유연한 공급이 될 수 있게 한다.
By configuring the BOG treatment system of the present invention as described above, it enables flexible supply by controlling the production volume of liquefied natural gas and compressed natural gas as needed.

다음으로, 도 3 내지 도 5에서는 앞서 설명된 본 발명의 일 실시예에 의한 부유식 액화천연가스 생산저장하역시설에 대한 다른 응용예를 도시한 것이다.Next, FIGS. 3 to 5 show another application example for the floating liquefied natural gas production, storage and unloading facility according to an embodiment of the present invention described above.

각 응용예에서의 특징적인 부가 구성 이외에 앞선 실시예에서 설명된 사항에 대해서는 그 설명을 줄이거나 생략하도록 한다.In addition to the characteristic additional configuration in each application example, the description of the matters described in the previous embodiment will be reduced or omitted.

도 3에 도시된 부유식 액화천연가스 생산저장하역시설(200)에서의 증발가스처리시스템은, 앞선 실시예에서의 이동 가능한 저장탱크와 달리 고정식의 압축천연가스 저장탱크(21)가 구비되고, 이를 압축천연가스 운반선(C)에 하역시키기 위한 CNG 하역장치(50)를 더 포함하는 것을 특징으로 한다.The BOG treatment system in the floating liquefied natural gas production, storage and unloading facility 200 shown in FIG. 3 is provided with a fixed compressed natural gas storage tank 21, unlike the movable storage tank in the previous embodiment, It is characterized in that it further comprises a CNG unloading device 50 for loading and unloading the compressed natural gas carrier (C).

즉, 증발가스로부터 압축된 천연가스는 대용량의 고정식 압축천연가스 저장탱크(21)에 저장되게 하고, 이를 CNG 하역장치(50)에 의해서 CNG 운반선(C)에 하역될 수 있게 하는 것이다.That is, the natural gas compressed from the boil-off gas is stored in the large-capacity fixed compressed natural gas storage tank 21 , and it can be unloaded onto the CNG carrier C by the CNG unloading device 50 .

이를 위해 압축천연가스 저장탱크(21)에는 하역을 위한 노즐 등의 하역을 위한 수단이 구비될 수 있음은 물론이다.For this purpose, it goes without saying that the compressed natural gas storage tank 21 may be provided with means for unloading, such as a nozzle for unloading.

여기서 부유식 액화천연가스 생산저장하역시설에서의 액화천연가스와 압축천연가스가 하역되는 구역은 각각 구분되게 배치되는 것이 바람직하다.Here, in the floating liquefied natural gas production, storage and unloading facility, it is preferable that the liquefied natural gas and compressed natural gas are unloaded separately from each other.

즉, CNG 하역장치(50)와 LNG하역장치(51)는 구분되어 배치되는 것이 바람직하며, 도시에는 CNG 하역장치(50)가 좌현(Port, P)에 배치되어 CNG 운반선(C)이 좌현 측에 계류되게 하고, LNG 하역장치(51)는 우현(Starboard, S)에 배치되어 LNG 운반선(L)은 우현 측에 계류된 것을 도시하였다.That is, it is preferable that the CNG unloading device 50 and the LNG loading and unloading device 51 are arranged separately. and the LNG unloading device 51 is arranged on the starboard (S), so that the LNG carrier (L) is moored on the starboard side.

이와 같이 구분되어 배치되는 것으로 족하고, 좌우현에 배치되는 것은 위와 반대로 배치될 수 있으며, CNG 하역장치는 우현이나 좌현에 배치되고, LNG 하역장치는 선수나 선미에 배치시킬 수도 있다.
It suffices to be separated and arranged in this way, and those arranged on the left and right sides may be arranged opposite to the above.

도 4에 도시된 부유식 액화천연가스 생산저장하역시설(300)에서의 증발가스처리시스템은, 앞서 설명된 실시예와 달리 CNG 하역장치(50)가 CNG 저장탱크(21)에 저장된 압축천연가스를 CNG 운반선(C)에 하역하는 대신, CNG를 사용하여 추진되는 선박의 CNG 추진연료저장탱크(60)에 직접 하역되게 하는 것을 특징으로 한다.Unlike the embodiment described above, the BOG treatment system in the floating liquefied natural gas production, storage and unloading facility 300 shown in FIG. Instead of unloading the CNG carrier (C), it is characterized in that it is directly unloaded into the CNG propulsion fuel storage tank (60) of a ship propelled using CNG.

도시에는 LNG 운반선에 구비된 CNG 추진연료저장탱크(60)에 CNG 하역장치(50)가 CNG 저장탱크(21)에 저장된 압축천연가스를 공급하는 것을 도시하였고, 대신 CNG 운반선이나 다른 선박일 수도 있다.
In the city, it is shown that the CNG unloading device 50 supplies the compressed natural gas stored in the CNG storage tank 21 to the CNG propulsion fuel storage tank 60 provided in the LNG carrier, and instead it may be a CNG carrier or other vessel. .

도 5에 도시된 부유식 액화천연가스 생산저장하역시설(400)에서의 증발가스처리시스템은, 앞서 설명된 실시예와 달리 제1 압력조절장치(10)에 의해 압축된 압축천연가스를 액화시스템(130)으로 재순환시키는 것을 특징으로 한다.Unlike the embodiment described above, the BOG treatment system in the floating liquefied natural gas production, storage and unloading facility 400 shown in FIG. 5 liquefies the compressed natural gas compressed by the first pressure control device 10 . It is characterized in that it is recycled to (130).

이와 같이 CNG 저장탱크의 용량 및 CNG 운반선에의 하역 스케쥴 등에 따라서 증발가스가 압축된 천연가스를 저장하는 대신 액화시스템(130)으로 재순환되게 하는 것이다.In this way, the boil-off gas is recycled to the liquefaction system 130 instead of storing the compressed natural gas according to the capacity of the CNG storage tank and the schedule for loading and unloading the CNG carrier.

다시 재액화된 천연가스는 LNG 저장탱크(140)에 저장될 수 있음은 물론이다.
Of course, the re-liquefied natural gas may be stored in the LNG storage tank 140 .

이상과 같이 본 발명에 따른 부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템 및 이를 포함하는 부유식 액화천연가스 생산저장하역시설에 의하면, 발생된 증발가스를 압축천연가스의 형태로 전량 회수하여 처리가 가능하고, 부유식 액화천연가스 생산저장하역시설이나 기타 여건에 의해 다양한 변형이 가능함을 설명하였다.As described above, according to the BOG treatment system of the floating liquefied natural gas production, storage and unloading facility according to the present invention and the floating liquefied natural gas production, storage and unloading facility including the same, the total amount of the generated BOG is recovered in the form of compressed natural gas. It was explained that various modifications are possible depending on the floating liquefied natural gas production, storage and unloading facilities or other conditions.

이는 예시된 도면을 참조하여 설명하였으나, 본 발명은 이상에서 설명된 실시 예와 도면에 의해 한정되지 않으며, 특허청구범위 내에서 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자들에 의해 다양한 수정 및 변형이 이루어질 수 있음은 물론이다.This has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings described above, and various modifications and Of course, variations can be made.

100, 200, 300, 400: 부유식 액화천연가스 생산저장하역시설
110: 가스인입시스템
120: 전처리시스템
130: 액화시스템
140: LNG 저장탱크
10: 제1 압력조절장치 11: 제2 압력조절장치
20: 압축천연가스 저장탱크
30: 발전기관
40: 외기배출장치
50: CNG 하역장치 51: LNG 하역장치
60: CNG 추진연료저장탱크100, 200, 300, 400: Floating liquefied natural gas production, storage and unloading facilities
110: gas inlet system
120: pretreatment system
130: liquefaction system
140: LNG storage tank
10: first pressure regulating device 11: second pressure regulating device
20: compressed natural gas storage tank
30: power plant
40: outdoor air exhaust device
50: CNG unloading device 51: LNG unloading device
60: CNG propulsion fuel storage tank

Claims (15)

가스전으로부터 생산되는 천연가스를 액화하여, 저장 및 하역하는 부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템에 있어서,
상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크로부터 발생되는 증발가스를 압축하기 위한 제1 압력조절장치;
상기 제1 압력조절장치에 의해 압축된 압축천연가스를 저장하기 위한 압축천연가스 저장탱크(CNG Storage tank); 및
상기 부유식 액화천연가스 생산저장하역시설의 액화시스템 또는 전처리시스템의 후단에 마련되어 천연가스를 압축하는 제2 압력조절장치:를 포함하며,
상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크로부터 발생되는 증발가스(Boil-off gas, BOG)를 회수하여 저장하고, 상기 제2 압력조절장치에서 압축된 압축천연가스를 상기 압축천연가스 저장탱크에 저장하여,
액화천연가스와 압축천연가스의 생산량을 조절하여 공급할 수 있는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템.In the BOG treatment system of a floating liquefied natural gas production, storage and unloading facility that liquefies, stores and unloads natural gas produced from a gas field,
a first pressure regulating device for compressing the boil-off gas generated from the LNG storage tank of the floating liquefied natural gas production, storage and unloading facility;
a compressed natural gas storage tank (CNG Storage tank) for storing the compressed natural gas compressed by the first pressure control device; and
A second pressure regulating device for compressing natural gas provided at the rear end of the liquefaction system or pretreatment system of the floating liquefied natural gas production, storage and unloading facility includes:
Boil-off gas (BOG) generated from the LNG storage tank of the floating liquefied natural gas production, storage and unloading facility is recovered and stored, and the compressed natural gas compressed in the second pressure control device is converted into the compressed natural gas. stored in a storage tank,
characterized in that it can be supplied by controlling the production volume of liquefied natural gas and compressed natural gas,
BOG treatment system of floating liquefied natural gas production, storage and unloading facilities. 청구항 1에 있어서,
상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크로부터 발생되는 증발가스를 연료로 소모시키기 위한 발전기관; 및
상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크로부터 발생되는 증발가스를 외부로 배출시키기 위한 외기배출장치를 더 포함하는,
부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템.The method according to claim 1,
a power generation engine for consuming boil-off gas generated from the LNG storage tank of the floating liquefied natural gas production, storage and offloading facility as fuel; and
Further comprising an outdoor air exhaust device for discharging the boil-off gas generated from the LNG storage tank of the floating liquefied natural gas production, storage and offloading facility to the outside,
BOG treatment system of floating liquefied natural gas production, storage and unloading facilities. 청구항 1에 있어서,
상기 압축천연가스 저장탱크는 자체 하역 가능하여, CNG 운반선으로 하역되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템.The method according to claim 1,
The compressed natural gas storage tank is capable of unloading itself, characterized in that it is unloaded by a CNG carrier,
BOG treatment system of floating liquefied natural gas production, storage and unloading facilities. 삭제delete 청구항 1에 있어서,
상기 압축천연가스 저장탱크에 저장된 압축천연가스를 CNG 운반선에 하역하기 위한 CNG 하역장치를 더 포함하는,
부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템.The method according to claim 1,
Further comprising a CNG unloading device for loading and unloading the compressed natural gas stored in the compressed natural gas storage tank to the CNG carrier,
BOG treatment system of floating liquefied natural gas production, storage and unloading facilities. 청구항 5에 있어서,
상기 CNG 하역장치는 상기 부유식 액화천연가스 생산저장하역시설의 좌현 또는 우현의 어느 일 측에 배치되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템.6. The method of claim 5,
The CNG unloading device is characterized in that it is disposed on either side of the port side or the starboard side of the floating liquefied natural gas production, storage and unloading facility,
BOG treatment system of floating liquefied natural gas production, storage and unloading facilities. 청구항 6에 있어서,
상기 부유식 액화천연가스 생산저장하역시설의 LNG 저장탱크에 저장된 액화천연가스를 LNG 운반선에 하역하기 위한 LNG 하역장치는, 선현(船舷) 중 상기 CNG 하역장치가 배치되는 측과 다른 측에 배치되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템.7. The method of claim 6,
The LNG unloading device for loading and unloading liquefied natural gas stored in the LNG storage tank of the floating LNG production, storage and unloading facility to an LNG carrier is disposed on a side different from the side on which the CNG unloading device is disposed among the shipboard. characterized by,
BOG treatment system of floating liquefied natural gas production, storage and unloading facilities. 청구항 5에 있어서,
상기 CNG 하역장치는 운반선의 CNG 추진연료저장탱크에 직접 하역할 수 있는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템.6. The method of claim 5,
The CNG unloading device is characterized in that it can be directly unloaded into the CNG propulsion fuel storage tank of the carrier,
BOG treatment system of floating liquefied natural gas production, storage and unloading facilities. 청구항 1에 있어서,
상기 제1 압력조절장치를 통과한 압축천연가스는, 상기 부유식 액화천연가스 생산저장하역시설의 액화시스템으로 재순환되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템.The method according to claim 1,
The compressed natural gas that has passed through the first pressure control device is characterized in that it is recycled to the liquefaction system of the floating liquefied natural gas production, storage and unloading facility,
BOG treatment system of floating liquefied natural gas production, storage and unloading facilities. 가스전으로부터 천연가스를 인입하는 가스인입시스템;
상기 가스인입시스템에 의해 인입된 천연가스를 전처리하는 전처리시스템;
상기 전처리시스템에 의해 전처리된 천연가스를 액화하는 액화시스템;
상기 액화시스템에 의해 액화된 액화천연가스를 저장하는 LNG 저장탱크; 및
상기 LNG 저장탱크로부터 발생되는 증발가스(Boil-off gas, BOG)를 회수하여 저장하는 증발가스 처리시스템을 포함하되,
상기 증발가스 처리시스템은, 상기 LNG 저장탱크로부터 발생되는 증발가스를 압축하기 위한 제1 압력조절장치; 상기 제1 압력조절장치에 의해 압축된 압축천연가스를 저장하기 위한 압축천연가스 저장탱크(CNG Storage tank); 및 상기 액화시스템 또는 상기 전처리시스템의 후단에 마련되는 제2 압력조절장치:를 포함하며, 상기 제2 압력조절장치에 의해 압축된 압축천연가스는 상기 압축천연가스 저장탱크에 저장되어,
액화천연가스와 압축천연가스의 생산량을 조절하여 공급할 수 있는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.a gas inlet system for introducing natural gas from a gas field;
a pretreatment system for pretreating the natural gas introduced by the gas introduction system;
a liquefaction system for liquefying the natural gas pretreated by the pretreatment system;
an LNG storage tank for storing liquefied natural gas liquefied by the liquefaction system; and
Including a boil-off gas treatment system for recovering and storing boil-off gas (BOG) generated from the LNG storage tank,
The boil-off gas treatment system includes: a first pressure regulating device for compressing the boil-off gas generated from the LNG storage tank; a compressed natural gas storage tank (CNG Storage tank) for storing the compressed natural gas compressed by the first pressure control device; and a second pressure regulating device provided at the rear end of the liquefaction system or the pretreatment system, wherein the compressed natural gas compressed by the second pressure regulating device is stored in the compressed natural gas storage tank,
characterized in that it can be supplied by controlling the production volume of liquefied natural gas and compressed natural gas,
Floating liquefied natural gas production, storage and unloading facility. 삭제delete 청구항 10에 있어서,
상기 압축천연가스 저장탱크는 자체 하역 가능하여, CNG 운반선으로 하역되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.11. The method of claim 10,
The compressed natural gas storage tank is capable of unloading itself, characterized in that it is unloaded by a CNG carrier,
Floating liquefied natural gas production, storage and unloading facility. 삭제delete 청구항 10에 있어서,
상기 증발가스 처리시스템은 상기 압축천연가스 저장탱크에 저장된 압축천연가스를 CNG 운반선에 하역하기 위한 CNG 하역장치를 더 포함하고,
상기 CNG 하역장치는 좌현 또는 우현의 어느 일 측에 배치되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.11. The method of claim 10,
The boil-off gas treatment system further includes a CNG unloading device for unloading the compressed natural gas stored in the compressed natural gas storage tank to a CNG carrier,
The CNG unloading device is characterized in that it is disposed on either side of the port or starboard,
Floating liquefied natural gas production, storage and unloading facility. 청구항 10에 있어서,
상기 제1 압력조절장치에 의해 압축된 압축천연가스는 상기 액화시스템으로 재순환되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.11. The method of claim 10,
The compressed natural gas compressed by the first pressure regulating device is characterized in that it is recirculated to the liquefaction system,
Floating liquefied natural gas production, storage and unloading facility.
KR1020150012349A 2015-01-26 2015-01-26 Boil-off gas management system of the lng-fpso and the lng-fpso with the same KR102297865B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150012349A KR102297865B1 (en) 2015-01-26 2015-01-26 Boil-off gas management system of the lng-fpso and the lng-fpso with the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150012349A KR102297865B1 (en) 2015-01-26 2015-01-26 Boil-off gas management system of the lng-fpso and the lng-fpso with the same

Publications (2)

Publication Number Publication Date
KR20160091784A KR20160091784A (en) 2016-08-03
KR102297865B1 true KR102297865B1 (en) 2021-09-03

Family

ID=56708673

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150012349A KR102297865B1 (en) 2015-01-26 2015-01-26 Boil-off gas management system of the lng-fpso and the lng-fpso with the same

Country Status (1)

Country Link
KR (1) KR102297865B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106586318B (en) * 2016-12-30 2019-03-15 南通中远船务工程有限公司 FPSO cargo tank rebreather
US20180259248A1 (en) * 2017-03-13 2018-09-13 General Electric Company System for Producing Vehicle Fuel
US11717784B1 (en) 2020-11-10 2023-08-08 Solid State Separation Holdings, LLC Natural gas adsorptive separation system and method
CA3228904A1 (en) 2021-09-09 2023-03-16 Jason G.S. Ho Portable pressure swing adsorption method and system for fuel gas conditioning
CN114776524B (en) * 2022-04-18 2023-11-07 中交机电工程局有限公司 Ship-borne cold energy and wind energy hybrid power supply system suitable for FSRU

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004051049A (en) * 2002-07-23 2004-02-19 Ishikawajima Harima Heavy Ind Co Ltd Bog processing method and device of liquefied gas carrying vessel
KR100935643B1 (en) * 2009-05-23 2010-01-07 주식회사 엔케이 Storage and transport method of cng by a container ship, and manifold apparatus for loading and unloading of gas using thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119479A (en) * 1998-12-09 2000-09-19 Air Products And Chemicals, Inc. Dual mixed refrigerant cycle for gas liquefaction
KR20090117336A (en) 2008-05-09 2009-11-12 대우조선해양 주식회사 Liquified gas carrier having pressure container for storaging boil-off gas
KR20100047387A (en) 2008-10-29 2010-05-10 삼성중공업 주식회사 Boil off gas treatment apparatus and lng carrier using the same
KR101110864B1 (en) * 2009-02-27 2012-02-16 삼성중공업 주식회사 LNG FPSO: LNG Floating Production Storage Offloading
KR20130052937A (en) 2011-11-14 2013-05-23 대우조선해양 주식회사 Liquefied gas carrier having boil-off gas tank
KR101413544B1 (en) 2013-05-06 2014-07-02 주식회사래티스테크놀로지 A Temporary Boil-off Gas Storage System

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004051049A (en) * 2002-07-23 2004-02-19 Ishikawajima Harima Heavy Ind Co Ltd Bog processing method and device of liquefied gas carrying vessel
KR100935643B1 (en) * 2009-05-23 2010-01-07 주식회사 엔케이 Storage and transport method of cng by a container ship, and manifold apparatus for loading and unloading of gas using thereof

Also Published As

Publication number Publication date
KR20160091784A (en) 2016-08-03

Similar Documents

Publication Publication Date Title
JP5801912B2 (en) Fuel supply method using liquefied fuel gas supply ship
KR101559403B1 (en) Apparatus and method for treating boil-off gas to reduce reliquefaction power consumption
EP1613529B1 (en) System and method for floating production, storage and offloading of lng
KR102297865B1 (en) Boil-off gas management system of the lng-fpso and the lng-fpso with the same
AU2017207324B2 (en) Natural gas liquefaction vessel
KR101164087B1 (en) Apparatus and method for treating boil-off gas to reduce reliquefaction power consumption
KR20160088183A (en) System for treating boil off gas of a ship
KR101748784B1 (en) Boil-off-gas treatment system of lng bunkering ship
US20170050713A1 (en) Fuel gas supply system of vessel
KR20200022869A (en) Fuel Supplying System And Method For Ship Using Liquefied Gas
KR101637450B1 (en) Boil-Off Gas Treatment System For Ship
KR102333068B1 (en) Lng-fpso
KR102539439B1 (en) Fuel Supplying System And Method For Ship Using Liquefied Gas
KR20220033068A (en) Fuel supply system for vessel and vessel including the same
KR102552635B1 (en) N2 Purging System And Method For Ship
KR101606562B1 (en) Apparatus and method for treating boil-off gas
KR102372752B1 (en) Apparatus and method for supplying electricity to outside of flng
KR102539435B1 (en) Fuel Supplying System And Method For Ship Using Liquefied Gas
KR102239826B1 (en) Offshore Natural Gas Liquefaction And Storage Method, And Stucture Using The Same
KR101707515B1 (en) Boil-off gas management system of the lng-fpso and the lng-fpso with the same
KR102333069B1 (en) FLNG and Method of Bunkering for FLNG
KR102542458B1 (en) Fuel Supplying System And Method For Ship Using Liquefied Gas
KR102487007B1 (en) System and method for treating gas of ship
KR102578399B1 (en) Fuel Supplying System For Liquefied Gas Carrier
KR101491033B1 (en) Gas Trial System And Method For Ship

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant