KR102333068B1 - Lng-fpso - Google Patents

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KR102333068B1
KR102333068B1 KR1020150012350A KR20150012350A KR102333068B1 KR 102333068 B1 KR102333068 B1 KR 102333068B1 KR 1020150012350 A KR1020150012350 A KR 1020150012350A KR 20150012350 A KR20150012350 A KR 20150012350A KR 102333068 B1 KR102333068 B1 KR 102333068B1
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natural gas
storage tank
gas
storage
lng
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KR20160091785A (en
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이수호
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대우조선해양 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed 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
    • 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 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • 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]
    • 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
    • F17C2265/032—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
    • 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

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 선박을 추진하기 위한 주동력장치를 포함하고, 상기 가스인입시스템과 상기 주동력장치는 선수 또는 선미 중 동일한 측에 배치되는 것을 특징으로 함으로써, 본 발명에 의하면, 생산설비의 관점에서 보다 효율적으로 배치 설계 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 for liquefying the liquefaction system, an LNG storage tank for storing the liquefied natural gas liquefied by the liquefaction system, and a main power device for propulsion of a ship, wherein the gas inlet system and the main power device are the same among bow or stern By characterized in that it is arranged on the side, according to the present invention, it is possible to operate a floating liquefied natural gas production, storage and unloading facility that can be arranged more efficiently in terms of production facilities.

Figure R1020150012350
Figure R1020150012350

Description

부유식 액화천연가스 생산저장하역시설{LNG-FPSO}Floating liquefied natural gas production, storage and unloading facility {LNG-FPSO}

본 발명은 천연가스를 인입하여 생산, 저장 및 하역하기 위한 설비인 부유식 액화천연가스 생산저장하역시설(LNG-FPSO, FLNG, LNG-Floating, Production, Storage and Offloading)에 관한 것이고, 구체적으로는 그것의 효율적인 운용을 위한 최적화 배치에 관한 것이다.The present invention relates to a floating liquefied natural gas production, storage and offloading facility (LNG-FPSO, FLNG, LNG-Floating, Production, Storage and Offloading), which is a facility for introducing, producing, storing and unloading natural gas, and specifically It relates to an optimized arrangement for its efficient operation.

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 추진기관(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 propulsion 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.

이와 같이, LNG 저장탱크에서 발생된 증발가스를 재액화하여 다시 LNG 저장탱크로 복귀시키는 방식은 복잡한 시스템의 증발가스 재액화 장치를 설치해야 하는 문제점이 있었다.As described above, 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 reliquefaction device must be installed.

그러나, 이와 같이 LNG에서 발생하는 증발가스를 재액화하여 다시 LNG 저장탱크에 저장하는 등의 고려는, 사실 LNG RV (Regasification Vessel), LNG FSRU (Floating Storage and Regasification Unit)나 LNGC(LNG Carrier)와 같이 저장 및 운송이 주목적인 선박에서의 주요 관점일 수는 있지만, FLNG와 같이 직접 천연가스를 생산하는 설비에는 적합하지 않은 면이 있다.However, the consideration of re-liquefying boil-off gas generated from LNG and storing it in an LNG storage tank is, in fact, a combination of LNG RV (Regasification Vessel), LNG FSRU (Floating Storage and Regasification Unit), or LNGC (LNG Carrier). Although storage and transportation may be the main aspects of ships, it is not suitable for facilities that directly produce natural gas such as FLNG.

그런데, 기존의 FLNG는 이 같은 고려 없이 LNG RV, LNG FSRU 또는 LNGC의 배치 구조에 근거하여 설계가 됨으로써 비효율적인 측면이 있었다.However, the existing FLNG was designed based on the arrangement structure of an LNG RV, an LNG FSRU, or an LNGC without such consideration, and thus was inefficient.

본 발명은 상술한 문제점을 해결하고자 안출된 것으로서, 본 발명은 생산설비의 관점에서 보다 효율적으로 배치 설계 가능한 부유식 액화천연가스 생산저장하역시설을 제공하는 데 그 목적이 있다.The present invention has been devised to solve the above problems, and an object of the present invention is to provide a floating liquefied natural gas production, storage and unloading facility that can be designed more efficiently in terms of production facilities.

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 선박의 운용에 필요한 동력을 생산하는 주동력장치를 포함하고, 상기 가스인입시스템과 상기 주동력장치는 선수 또는 선미 중 동일한 측에 배치되는 것을 특징으로 한다.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 the liquefied natural gas liquefied by the liquefaction system, and a main power device for generating power required for the operation of a ship, wherein the gas inlet system and the main power device include It is characterized in that it is arranged on the same side of the bow or the stern.

여기서, 상기 가스인입시스템에 의해 인입된 천연가스를 가압하는 제1 가압장치를 더 포함하여, 상기 제1 가압장치에 의해 압축된 압축천연가스(Compressed natural gas, CNG)가 상기 주동력장치에 공급되는 것을 구체적인 특징으로 한다.Here, further comprising a first pressurizing device for pressurizing the natural gas introduced by the gas inlet system, the compressed natural gas compressed by the first pressurizing device (Compressed natural gas, CNG) is supplied to the main power unit to be a specific feature.

그리고, 상기 가스인입시스템에 의해 인입된 천연가스를 외부로 배출시키기 위한 제1 외기배출장치를 더 포함할 수 있다.And, it may further include a first outdoor air discharge device for discharging the natural gas introduced by the gas introduction system to the outside.

한편, 본 발명에 따른 부유식 액화천연가스 생산저장하역시설은, 상기 LNG 저장탱크로부터 발생되는 증발가스(Boil-off gas, BOG)를 회수하여 저장하는 증발가스 처리시스템을 더 포함할 수 있다.Meanwhile, the floating liquefied natural gas production, storage and unloading facility according to the present invention may further include a boil-off gas treatment system for recovering and storing boil-off gas (BOG) generated from the LNG storage tank.

상기 증발가스 처리시스템은, 상기 LNG 저장탱크로부터 발생되는 증발가스를 압축하기 위한 제2 가압장치 및 상기 제2 가압장치에 의해 압축된 압축천연가스를 저장하기 위한 압축천연가스 저장탱크(CNG Storage tank)를 포함하는 것을 특징으로 한다.The BOG treatment system includes a second pressurizing device for compressing BOG generated from the LNG storage tank and a compressed natural gas storage tank for storing the compressed natural gas compressed by the second pressurizing device. ), characterized in that it contains.

또한, 상기 증발가스 처리시스템은, 상기 LNG 저장탱크로부터 발생되는 증발가스를 외부로 배출시키기 위한 제2 외기배출장치를 더 포함할 수 있다.In addition, the BOG treatment system may further include a second outdoor air exhaust device for discharging BOG generated from the LNG storage tank to the outside.

그리고, 상기 압축천연가스 저장탱크로부터 압축천연가스를 공급받는 보조동력장치를 더 포함할 수 있고, 상기 압축천연가스 저장탱크로부터 압축천연가스를 공급받는 보일러장치를 더 포함할 수 있다.And, it may further include an auxiliary power device for receiving the compressed natural gas from the compressed natural gas storage tank, may further include a boiler device for receiving the compressed natural gas from the compressed natural gas storage tank.

여기서, 상기 보조동력장치는 선체 내부에 설치되고, 상기 보조동력장치의 상측으로 거주구 및 조종실이 배치될 수 있다.Here, the auxiliary power unit may be installed inside the hull, and a residence and a cockpit may be disposed above the auxiliary power unit.

상기 압축천연가스 저장탱크는 선수 또는 선미 중 상기 주동력장치와 다른 측에 배치되는 것을 또한 특징으로 하며, 상기 가스인입시스템과 상기 주동력장치는 상기 LNG 저장탱크를 기준으로 선수측 또는 선미측 중 어느 일 측에에 배치되는 것을 또한 특징으로 한다.The compressed natural gas storage tank is further characterized in that it is disposed on the other side of the main power device of the bow or stern, and the gas inlet system and the main power device are either on the bow side or the stern side based on the LNG storage tank. It is also characterized in that it is disposed on either side.

그리고, 상기 압축천연가스 저장탱크는 상기 LNG 저장탱크를 기준으로 선수측 또는 선미측 중 상기 주동력장치와 다른 측에 배치되는 것을 또 다른 특징으로 한다.And, the compressed natural gas storage tank is further characterized in that it is disposed on the other side of the main power device among the bow side or the stern side with respect to the LNG storage tank.

다음으로, 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, 선박의 운용에 필요한 동력을 생산하는 주동력장치 및 상기 LNG 저장탱크로부터 발생되는 증발가스(Boil-off gas, BOG)를 압축하여 저장하는 압축천연가스 저장탱크를 포함한 증발가스 처리시스템을 포함하고, 상기 압축천연가스 저장탱크와 상기 주동력장치는 선수 또는 선미 중 다른 측에 배치되는 것을 특징으로 한다.Next, 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 pretreatment system. A liquefaction system for liquefying the pretreated natural gas, an LNG storage tank for storing the liquefied natural gas liquefied by the liquefaction system, a main power device for generating power required for the operation of a ship, and boil-off gas generated from the LNG storage tank ( Boil-off gas (BOG) comprising a boil-off gas treatment system including a compressed natural gas storage tank for compressing and storing, wherein the compressed natural gas storage tank and the main power device are disposed on the other side of the bow or the stern do it with

상기 증발가스 처리시스템은, 상기 LNG 저장탱크로부터 발생되는 증발가스를 외부로 배출시키기 위한 외기배출장치를 더 포함하고, 상기 외기배출장치 및 상기 압축천연가스 저장탱크로부터 압축천연가스를 공급받는 보조동력장치 또는 보일러장치를 통해 증발가스를 처리하는 것을 구체적인 특징으로 한다.The BOG treatment system further includes an outdoor air exhaust device for discharging BOG generated from the LNG storage tank to the outside, and an auxiliary power receiving compressed natural gas from the outside air exhaust device and the compressed natural gas storage tank. It is specifically characterized in that the boil-off gas is treated through a device or a boiler device.

여기서, 상기 가스인입시스템과 상기 주동력장치는 상기 LNG 저장탱크를 기준으로 선수측 또는 선미측 중 어느 일 측에 배치되는 것을 또 다른 특징으로 한다.Here, it is another feature that the gas inlet system and the main power device are arranged on either side of the bow side or the stern side with respect to the LNG storage tank.

그리고, 상기 보조동력장치는 선체 내부에 설치되고, 상기 보조동력장치의 상측으로 거주구 및 조종실이 배치될 수 있다.In addition, the auxiliary power unit may be installed inside the hull, and a residence and a cockpit may be disposed above the auxiliary power unit.

본 발명의 부유식 액화천연가스 생산저장하역시설에 의하면,According to the floating liquefied natural gas production, storage and unloading facility of the present invention,

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, 가스인입시스템과 주동력장치를 인접 배치시킴으로써, 인입되는 가스의 주동력장치로의 경로를 단순화하여 보다 효율을 높일 수 있다.And, by arranging the gas inlet system and the main power unit adjacent to each other, it is possible to simplify the path of the introduced gas to the main power unit, thereby increasing the efficiency more.

또한, 무게 중심의 변화가 작은 주동력장치를 가스인입시스템과 연결되는 터렛에 인접 배치하기 때문에 선박동요에 대해 보다 안정적이다.In addition, since the main power unit with a small change in the center of gravity is disposed adjacent to the turret connected to the gas inlet system, it is more stable against ship sway.

그리고, 발생하는 증발가스를 압축천연가스(CNG, Compressed Natural Gas)의 형태로 전용탱크에 저장함으로써, LNG 저장탱크에서 발생되는 BOG의 낭비를 줄일 수 있다.And, by storing the generated boil-off gas in a dedicated tank in the form of compressed natural gas (CNG), the waste of BOG generated in the LNG storage tank can be reduced.

또한, 회수된 CNG를 보조동력장치나 보일러장치를 통해 사용이 가능하여 전량 사용할 수 있는 등으로 보다 효율적이다.In addition, the recovered CNG can be used through an auxiliary power device or a boiler device, so that it can be used in its entirety, which is more efficient.

도 1은 종래의 부유식 액화천연가스 생산저장하역시설을 도시한 것이다.
도 2는 본 발명의 부유식 액화천연가스 생산저장하역시설을 개념적으로 도시한 것이다.
도 3은 본 발명의 부유식 액화천연가스 생산저장하역시설을 실제 배치에 가깝도록 측면을 기준으로 도시한 것이다.1 shows a conventional floating liquefied natural gas production, storage and unloading facility.
2 is a conceptual view of the floating liquefied natural gas production, storage and unloading facility of the present invention.
3 is a view showing the floating liquefied natural gas production, storage and unloading facility of the present invention from the side to be close to the actual arrangement.

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 을 도시한 것이고, 도 3은 본 발명의 부유식 액화천연가스 생산저장하역시설을 실제 배치에 가깝도록 측면을 기준으로 도시한 것이다.2 shows a floating liquefied natural gas production, storage and unloading facility according to an embodiment of the present invention, and FIG. 3 is a side view of the floating liquefied natural gas production, storage and unloading facility of the present invention close to the actual arrangement. it will be shown

도 2 및 도 3을 참조하면, 본 발명의 일 실시예에 따른 부유식 액화천연가스 생산저장하역시설(100)은, 가스인입시스템(110), 전처리시스템(120), 액화시스템(130), LNG 저장탱크(140), 주동력장치(150) 및 증발가스 처리시스템 등을 포함한다.2 and 3, 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, It includes an LNG storage tank 140 , a main power unit 150 , and a boil-off gas treatment system.

부유식 액화천연가스 생산저장하역시설에서의 가스인입시스템(110)은 해저로부터 가스를 인입하기 위한 수단을 포함함으로써, 해저 가스전으로부터 천연가스를 시추하여 선박으로 끌어올리기 위한 시스템이다. 이는 계류를 위한 터렛(turret)과 함께 대체로 선수 또는 선미에 배치시킨다.The gas inlet system 110 in the floating liquefied natural gas production, storage and offloading facility includes means for drawing in gas from the seabed, and is a system for drilling natural gas from a seabed gas field and pulling it up to a ship. It is usually placed in the bow or stern with a turret for mooring.

그리고, 전처리시스템(120)은 가스인입시스템(110)에 의해서 인입한 천연가스를 액화공정을 거치기 전 정제하여 전처리하는 과정을 수행하는 시스템이다.In addition, the pretreatment system 120 is a system for performing a pretreatment process by refining the natural gas introduced by the gas introduction system 110 before going through the liquefaction process.

다음으로, 액화시스템(130)은 인입되어 정제된 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, heat exchange, etc. to store the incoming and purified natural gas as liquefied natural gas.

이렇게 액화된 천연가스는 LNG 저장탱크(140)에 저장되고, 저장된 액화천연가스는 LNG 운반선에 하역함으로써 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.

또한, 주동력장치(150)는 선박의 운용에 필요한, 즉 플랜트의 가동에 필요한 동력을 생산하기 위한 주요 동력장치에 해당한다.
In addition, the main power unit 150 corresponds to the main power unit for producing power required for the operation of the ship, that is, the power required for the operation of the plant.

본 발명에 따른 부유식 액화천연가스 생산저장하역시설(100)은 가스인입시스템(110)과 주동력장치(150)가 동시에 선수측에 배치되거나, 또는 동시에 선미측에 배치된다.In the floating liquefied natural gas production, storage and unloading facility 100 according to the present invention, the gas inlet system 110 and the main power device 150 are disposed on the bow side at the same time, or are disposed on the stern side at the same time.

그리고, 가스인입시스템(110)에 의해서 인입된 천연가스는 제1 가압장치(111)에 의해 가압되어 압축천연가스(Compressed natural gas, CNG))로서 주동력장치(150)에 공급될 수 있게 한다.And, the natural gas introduced by the gas inlet system 110 is pressurized by the first pressurizing device 111 to be supplied to the main power unit 150 as compressed natural gas (Compressed natural gas, CNG)). .

이를 위해 제1 가압장치(111)는 주동력장치(150)의 요구 사양에 맞게 압력을 조절하여 천연가스를 연료로서 제공될 수 있게 한다.To this end, the first pressurization device 111 adjusts the pressure according to the required specifications of the main power device 150 so that natural gas can be provided as a fuel.

바람직하게는, 200 bar 내지 300 bar의 고압일 수 있다.Preferably, it may be a high pressure of 200 bar to 300 bar.

본 발명에 따른 부유식 액화천연가스 생산저장하역시설(100)은 이와 같이 배치되어 가스연료를 공급함으로써, 배관라인을 축소시키는 등의 배치상의 효율을 극대화한 것이다.The floating liquefied natural gas production, storage and unloading facility 100 according to the present invention is arranged in this way to supply gas fuel, thereby maximizing arrangement efficiency, such as reducing the pipe line.

또한, 무게중심의 변화가 작은 주동력장치(150)가 가스인입시스템(110)과 연결되는 터렛(turret)에 근접하게 배치됨으로써, 선박동요에 대한 안정성이 높아지게 된다.In addition, since the main power device 150 having a small change in the center of gravity is disposed close to a turret connected to the gas inlet system 110 , stability against ship sway is increased.

추가로, 제1 외기배출장치(112)를 가스인입시스템(110) 후단에 연결시킴으로써, 경우에 따라 인입된 천연가스를 외부로 배출시켜 운용할 수 있게 한다.
In addition, by connecting the first outdoor air exhaust device 112 to the rear end of the gas inlet system 110, in some cases, the introduced natural gas can be discharged to the outside and operated.

다음으로, 본 발명의 부유식 액화천연가스 생산저장하역시설의 증발가스 처리시스템은 LNG 저장탱크(140)에서 필연적으로 발생되는 증발가스(Boil-off gas, BOG)를 회수하여 처리하기 위한 시스템이다.Next, the boil-off gas treatment system of the floating liquefied natural gas production, storage and offloading 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, 제2 가압장치(161), 압축천연가스 저장탱크(162)를 포함하고, 제2 외기배출장치(163)를 더 포함할 수 있다.The BOG treatment system according to an embodiment of the present invention includes a second pressurization device 161 , a compressed natural gas storage tank 162 , and may further include a second outdoor air exhaust device 163 .

제2 가압장치(161)는 LNG 저장탱크(140)로부터 발생되는 증발가스(BOG)를 압축시키기 위한 것이다.The second pressurization device 161 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, 가압장치에 의해서 압축시켜서 처리하게 한다.The boil-off gas processing system according to an embodiment of the present invention does not re-liquefy the generated boil-off gas, but compresses it by a pressurizing device to process it.

이러한 가압장치는 발생되는 증발가스를 탱크 인입부의 요구 압력에 맞춰서 압력을 높임으로써, 증발가스를 압축천연가스(Compressed natural gas, CNG)로 변형시킨다.Such a pressurization device transforms the BOG into compressed natural gas (CNG) by increasing the pressure of the generated BOG in accordance with the required pressure of the tank inlet.

이렇게 가압된 압축천연가스는 이를 저장하기 위한 압축천연가스 저장탱크(CNG Storage tank)에 저장되게 할 수 있고, 저장된 압축천연가스는 CNG 운반선에 하역함으로써 CNG 형태의 천연가스를 근거리에 위치한 연안역이나 도서지역 등의 수요처로 운송될 수 있게 하고, 수요처에서는 이를 다시 기화시킬 필요없이 저장 및 사용될 수 있게 함으로써 육상설비도 간소화를 도모할 수도 있다.This pressurized natural gas can be stored in a compressed natural gas storage tank for storing it, and the stored compressed natural gas is unloaded on a CNG carrier so that natural gas in the form of CNG is transported to a nearby coastal area or island. The onshore facility can also be simplified by allowing it to be transported to a demanding place such as an area, and to be stored and used without the need to re-vaporize it in the demanding place.

이를 위한 압축천연가스 저장탱크는 압축된 천연가스를 저장할 수 있도록 고압전용 탱크인 것이 바람직하고, 압축천연가스 저장탱크의 요구 압력은 대략 150 bar 내지 350 bar이고, 250 bar 내지 300 bar로 가압하는 것이 바람직하다.For this purpose, the compressed natural gas storage tank is preferably a high-pressure dedicated tank to store compressed natural gas, and the required pressure of the compressed natural gas storage tank is approximately 150 bar to 350 bar, and pressurizing to 250 bar to 300 bar desirable.

한편, 본 발명의 일 실시예에서는 가압된 압축천연가스는 보조동력장치(151)에 의해서 증발가스를 보조추진연료로 소모할 수 있게 하거나, 보일러장치(170)에 의해서 별도의 온수공급시스템 등에 이용함으로써, 증발가스를 전량 회수, 사용될 수 있게 한다.On the other hand, in an embodiment of the present invention, the pressurized compressed natural gas can be consumed as auxiliary propulsion fuel by the auxiliary power device 151 or used in a separate hot water supply system by the boiler device 170 . By doing so, the entire amount of boil-off gas can be recovered and used.

또한, 증발가스 처리시스템은 제2 외기배출장치(163)를 더 포함하여, 제2 외기배출장치(163)에 의해서 증발가스를 외부로 배출시키도록 구현시킬 수도 있다.
In addition, the BOG treatment system may further include a second outdoor air exhaust device 163 to discharge the BOG to the outside by the second outdoor air exhaust device 163 .

한편, 본 발명에 따른 부유식 액화천연가스 생산저장하역시설(100)은 압축천연가스 저장탱크(162)가 선수 또는 선미 중 주동력장치(150) 및 가스인입시스템(110)이 배치된 측과 다른 측에 배치되는 것을 또 다른 특징으로 한다.On the other hand, the floating liquefied natural gas production, storage and unloading facility 100 according to the present invention has a compressed natural gas storage tank 162 at the fore or stern of the main power device 150 and the gas inlet system 110 are disposed side and Another feature is that it is disposed on the other side.

이와 같은 배치에 의해서 부유식 액화천연가스 생산저장하역시설의 공간 활용 및 공정의 효율을 극대화할 수 있다.By such arrangement, it is possible to maximize the space utilization and process efficiency of the floating liquefied natural gas production, storage and unloading facility.

이는 또한 도3에 도시된 바와 같이, LNG 저장탱크(140)를 기준으로 하여 선수측 또는 선미측으로도 충족될 수 있다.This may also be satisfied by the bow side or the stern side with respect to the LNG storage tank 140 as shown in FIG. 3 .

즉, 부유식 액화천연가스 생산저장하역시설의 운용계획 및 여건에 따라서 최선수측이나 최선미측이 아닌, LNG 저장탱크(140)를 기준으로 선수측 또는 선미측으로 주동력장치(150) 및 가스인입시스템(110)이 배치되고, 이와 반대측으로 압축천연가스 저장탱크(162)가 배치될 수도 있는 것이다.That is, the main power unit 150 and the gas inlet system to the bow side or the stern side based on the LNG storage tank 140, not the best water side or the most aft side, depending on the operation plan and conditions of the floating liquefied natural gas production, storage and unloading facility. 110 is disposed, the compressed natural gas storage tank 162 may be disposed on the opposite side to this.

계속해서 도3에서 참조되는 바와 같이, 거주구 및 조종실(180)은 보조동력장치(151)의 상측으로 배치되는 것이 구조상, 안정상 보다 유리할 수 있다.
Continuing to refer to FIG. 3 , it may be advantageous in terms of structure and stability if the living quarters and the cockpit 180 are disposed above the auxiliary power unit 151 .

이상과 같이 본 발명에 따른 부유식 액화천연가스 생산저장하역시설은 재액화장치의 구비가 필요치 않으므로, 천연가스를 생산하고 이를 연료로써 추진하는 측면에서 각 시스템 및 장치를 배치할 수 있어, 기존과 같이 저장에만 관점이 맞춰진 배치에 비해서 보다 효율적으로 증발가스를 회수하고, 에너지 소모를 최소화할 수 있게 한다.As described above, the floating liquefied natural gas production, storage and unloading facility according to the present invention does not require a re-liquefaction device, so each system and device can be arranged in terms of producing natural gas and propelling it as a fuel. It makes it possible to recover BOG more efficiently and minimize energy consumption compared to a batch focusing only on storage.

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: 부유식 액화천연가스 생산저장하역시설
110: 가스인입시스템
111: 제1 가압장치
112: 제1 외기배출장치
120: 전처리시스템
130: 액화시스템
140: LNG 저장탱크
150: 주동력장치
151: 보조동력장치
161: 제2 가압장치
162: 압축천연가스 저장탱크
163: 제2 외기배출장치
170: 보일러장치
180: 거주구 및 조종실100: Floating liquefied natural gas production, storage and unloading facility
110: gas inlet system
111: first pressurizing device
112: first outdoor air exhaust device
120: pretreatment system
130: liquefaction system
140: LNG storage tank
150: main power unit
151: auxiliary power unit
161: second pressurizing device
162: compressed natural gas storage tank
163: second outdoor air exhaust device
170: boiler device
180: living quarters and cockpit

Claims (16)

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;
상기 LNG 저장탱크로부터 발생되는 증발가스(Boil-Off Gas, BOG)를 압축하기 위한 제2 가압장치와, 상기 제2 가압장치에 의해 압축된 압축천연가스를 저장하기 위한 압축천연가스 저장탱크(CNG Storage tank)를 포함하여 증발가스를 회수하여 저장하는 증발가스 처리 시스템;
선박의 운용에 필요한 동력을 생산하는 주동력장치; 및
상기 압축천연가스 저장탱크로부터 압축천연가스를 공급받는 보조동력장치:를 포함하고,
상기 가스인입시스템과 상기 주동력장치는 선수 또는 선미 중 동일한 측에 배치되고, 상기 가스인입시스템에 의해 인입된 천연가스는 상기 주동력장치에 연료로 공급되며,
상기 압축천연가스 저장탱크는 선수 또는 선미 중 상기 주동력장치와 다른 측에 배치되는 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;
A second pressurizing device for compressing boil-off gas (BOG) generated from the LNG storage tank, and a compressed natural gas storage tank (CNG) for storing the compressed natural gas compressed by the second pressurizing device BOG treatment system for recovering and storing BOG, including a storage tank;
A main power device that produces power necessary for the operation of a ship; and
Auxiliary power device receiving compressed natural gas from the compressed natural gas storage tank: includes,
The gas inlet system and the main power device are disposed on the same side of the bow or stern, and the natural gas introduced by the gas inlet system is supplied as fuel to the main power device,
The compressed natural gas storage tank is characterized in that it is disposed on the other side of the main power device of the bow or stern,
Floating liquefied natural gas production, storage and unloading facility. 청구항 1에 있어서,
상기 가스인입시스템에 의해 인입된 천연가스를 가압하는 제1 가압장치를 더 포함하여,
상기 제1 가압장치에 의해 압축된 압축천연가스(Compressed natural gas, CNG)가 상기 주동력장치에 공급되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.The method according to claim 1,
Further comprising a first pressurizing device for pressurizing the natural gas introduced by the gas inlet system,
Compressed natural gas (CNG) compressed by the first pressurizing device, characterized in that the supply to the main power device,
Floating liquefied natural gas production, storage and unloading facility. 청구항 2에 있어서,
상기 가스인입시스템에 의해 인입된 천연가스를 외부로 배출시키기 위한 제1 외기배출장치를 더 포함하는,
부유식 액화천연가스 생산저장하역시설.3. The method according to claim 2,
Further comprising a first outdoor air exhaust device for discharging the natural gas introduced by the gas intake system to the outside,
Floating liquefied natural gas production, storage and unloading facility. 삭제delete 삭제delete 청구항 1에 있어서,
상기 증발가스 처리시스템은,
상기 LNG 저장탱크로부터 발생되는 증발가스를 외부로 배출시키기 위한 제2 외기배출장치를 더 포함하는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.The method according to claim 1,
The boil-off gas treatment system,
Characterized in that it further comprises a second outdoor air exhaust device for discharging the boil-off gas generated from the LNG storage tank to the outside,
Floating liquefied natural gas production, storage and unloading facility. 삭제delete 청구항 1에 있어서,
상기 압축천연가스 저장탱크로부터 압축천연가스를 공급받는 보일러장치를 더 포함하는,
부유식 액화천연가스 생산저장하역시설.The method according to claim 1,
Further comprising a boiler device receiving the compressed natural gas from the compressed natural gas storage tank,
Floating liquefied natural gas production, storage and unloading facility. 삭제delete 청구항 1에 있어서,
상기 가스인입시스템과 상기 주동력장치는 상기 LNG 저장탱크를 기준으로 선수측 또는 선미측 중 어느 일 측에 동시에 배치되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.The method according to claim 1,
The gas inlet system and the main power device are characterized in that they are simultaneously disposed on either side of the bow side or the stern side with respect to the LNG storage tank,
Floating liquefied natural gas production, storage and unloading facility. 청구항 10에 있어서,
상기 압축천연가스 저장탱크는 상기 LNG 저장탱크를 기준으로 선수측 또는 선미측 중 상기 주동력장치와 다른 측에 배치되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.11. The method of claim 10,
The compressed natural gas storage tank is characterized in that it is disposed on the other side of the main power device of the bow side or the stern side with respect to the LNG storage tank,
Floating liquefied natural gas production, storage and unloading facility. 청구항 1에 있어서,
상기 보조동력장치는 선체 내부에 설치되고,
상기 보조동력장치의 상측으로 거주구 및 조종실이 배치되는 것을 특징으로 하는,
부유식 액화천연가스 생산저장하역시설.The method according to claim 1,
The auxiliary power device is installed inside the hull,
Characterized in that the residence and the cockpit are disposed above the auxiliary power unit,
Floating liquefied natural gas production, storage and unloading facility. 삭제delete 삭제delete 삭제delete 삭제delete
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