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JPS6132557B2 - - Google Patents
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JPS6132557B2 - - Google Patents

Info

Publication number
JPS6132557B2
JPS6132557B2 JP16971081A JP16971081A JPS6132557B2 JP S6132557 B2 JPS6132557 B2 JP S6132557B2 JP 16971081 A JP16971081 A JP 16971081A JP 16971081 A JP16971081 A JP 16971081A JP S6132557 B2 JPS6132557 B2 JP S6132557B2
Authority
JP
Japan
Prior art keywords
bog
storage tank
liquefied gas
amount
ejector
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
JP16971081A
Other languages
English (en)
Other versions
JPS5872800A (ja
Inventor
Juzo Sugawara
Atsushi Kubota
Yasuhiro Takagishi
Makoto Tashimo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Gas Co Ltd
Original Assignee
Tokyo Gas Co Ltd
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 Tokyo Gas Co Ltd filed Critical Tokyo Gas Co Ltd
Priority to JP16971081A priority Critical patent/JPS5872800A/ja
Publication of JPS5872800A publication Critical patent/JPS5872800A/ja
Publication of JPS6132557B2 publication Critical patent/JPS6132557B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/126—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for large storage containers for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0119—Shape cylindrical with flat end-piece
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/043—Localisation of the removal point in the gas
    • F17C2223/045—Localisation of the removal point in the gas with a dip tube
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F17C2223/047—Localisation of the removal point in the liquid with a dip tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

【発明の詳細な説明】 （以下利用分野、従来技術等発明の目的） 本発明は、低温液体、例えば液化天然ガス（以
下LNGという）を貯蔵する貯槽内に於いて、自
然蒸発により発生するガス（以下BOGという）
を一時的に減少させる方法に係るものである。従
来、例えば需要等の減少により、貯槽内BOGの
量を一時的に減少する必要が生じた場合、その
BOGを貯槽１内から取出してそれを冷却液化装
置により液化していた。このため設備費高くなる
上に、液化装置の運転維持にも費用がかかり、コ
ストアツプにもつながつていた。本発明は、貯槽
内で発生したBOGを同一貯槽内の液化ガス中に
混入することにより、液化するようにしたもので
あり、以つて前記した従来の欠点を一挙に解決し
たものである。
以下図について詳述すると次の通りである。
（以下発明の構成作用） 図に於いて、符号１は、例えばLNGを貯蔵す
る貯槽であつて、該貯槽１内には、その上部に
BOG吸引部Ａを設けると共にその下部にはBOG
排出部Ｂを設けたBOG混入手段Ｃを設ける構成
とする。第１図の実施例に於いては、BOG吸引
部Ａは、排出管４、コンプレツサ５、ガス量コン
トロール弁６並びにBOG噴射管３等を介して、
ノズル２として構成したBOG排出管Ｂと接続し
た例であり、かかる構成によりBOG混入手段Ｃ
が構成される。第２図は、貯槽１内の縦方向にエ
ジエクタ８を設置し、このエジエクタ８の上端部
をBOG吸引部Ａに構成すると共に前記エジエク
タ８の下端部をBOG排出部Ｂに構成し、前記エ
ジエクタ８の上端部にはLNGをエジエクタ８内
に噴出するLNG噴出管１３を装置してBOG混入
手段Ｃが構成される例である。しかして、第１図
に於いて、例えば、一時的にBOG発生量を減少
する必要が生じた場合、コンプレツサ５によつて
貯槽１内のBOGを、BOG吸引部Ａから吸引し、
それをコントロール弁６を介して噴射管３に導
き、BOG排出部Ｂであるノズル２から液化ガス
中に噴射混入すると、液化ガスによつてBOGは
冷却されて液化する。BOGの混入によつて液化
ガス７は加熱されるが、液化ガスの熱容量が大き
いため、液温の上昇はゆるやかであり、液化ガス
の発生量の増加は微増であり、一時的にはBOG
の量を減少することができる。第２図は、LNG
噴出管１３から、エジエクタ８内に、エジエクタ
流量制御弁９を介して、液化ガスを噴出させ、エ
ジエクタ８内の圧力を貯槽１内のBOGの圧力よ
りも下げることによつて、図中矢印の通り、
BOGを吸引して液化ガス７中にBOGを混入し液
化する方法である。エジエクタ８に噴出する液化
ガスは、液化ガス取出管１０からその一部を取出
して行うものである。本発明は実操業に於いて、
例えば60000Kl貯槽でタンカーより受け入れをし
ている場合に於いて、本発明を適用しない場合に
は貯槽外に於いて約8000Nm3／ｈのBOGを液化処
理しなければならなかつたが、本発明のように貯
槽内で液化処理すると、貯槽外に於けるBOGの
液化処理量は、一時的に約0Nm3／ｈ〜7000Nm3／
ｈに減少させることができた。１１は液化ガス送
出ポンプである。以上の第１図及び第２図に於い
て、液化ガス取出管１０からジエツトミキシング
ノズル１２へ、液化ガスの一部を導き、貯槽１内
の液化ガス中へ液化ガスを噴出させて液化ガス７
の表面温度を下げてBOGの発生を抑制する方法
を併用してもよい。
（以下発明の効果） 本発明は以上の通りであるので、貯槽とは別個
に冷却液化装置を設ける必要がなく、従つてそれ
の設備維持費用がなくなるだけでなく、簡単な操
作で且つ短時間でBOGの量を減少することがで
き、一時的にBOGの量を減少する事態に即応で
きる大きなメリツトがある。
【図面の簡単な説明】
第１図及び第２図は全体の系統説明図である。 符号１……貯槽、２……ノズル、３……噴射
管、４……BOG排出管、５……コンプレツサ、
６……ガス量コントロール弁、７……液化ガス、
８……エジエクタ、９……エジエクタ流量制御
弁、１０……液化ガス取出管、１１……液化ガス
送出ポンプ。

Claims (1)

    【特許請求の範囲】
  1. １ 貯槽内の上部にBOG吸引部を設けると共に
    前記貯槽内下部にはBOG排出部を設けたBOG混
    入手段を貯槽内に設け、貯槽内で発生したBOG
    を、前記BOG混入手段により、同一貯槽内の液
    化ガス中に混入することにより液化して、一時的
    にタンク内のBOGの量を減少させることを特徴
    とする貯槽内液化ガスのBOG量減少方法。
JP16971081A 1981-10-23 1981-10-23 貯槽内液化ガスのｂｏｇ量減少方法 Granted JPS5872800A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16971081A JPS5872800A (ja) 1981-10-23 1981-10-23 貯槽内液化ガスのｂｏｇ量減少方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16971081A JPS5872800A (ja) 1981-10-23 1981-10-23 貯槽内液化ガスのｂｏｇ量減少方法

Publications (2)

Publication Number Publication Date
JPS5872800A JPS5872800A (ja) 1983-04-30
JPS6132557B2 true JPS6132557B2 (ja) 1986-07-28

Family

ID=15891428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16971081A Granted JPS5872800A (ja) 1981-10-23 1981-10-23 貯槽内液化ガスのｂｏｇ量減少方法

Country Status (1)

Country Link
JP (1) JPS5872800A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0713744U (ja) * 1993-08-13 1995-03-07 矢野 嘉一 シ−ト状連続体を収容した袋

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0005709D0 (en) * 2000-03-09 2000-05-03 Cryostar France Sa Reliquefaction of compressed vapour
NO315293B1 (no) * 2001-10-31 2003-08-11 Procyss As Fremgangsmåte for absorbering av damper og gasser ved kontroll av overtrykki lagertanker for v¶sker samt anvendelse av fremgangsmåten
KR100805022B1 (ko) * 2007-02-12 2008-02-20 대우조선해양 주식회사 Ｌｎｇ 운반선용 ｌｎｇ 저장탱크 및 이를 이용한 증발가스처리 방법
US8028724B2 (en) 2007-02-12 2011-10-04 Daewoo Shipbuilding & Marine Engineering Co., Ltd. LNG tank and unloading of LNG from the tank
US20090199591A1 (en) 2008-02-11 2009-08-13 Daewoo Shipbuilding & Marine Engineering Co., Ltd. Liquefied natural gas with butane and method of storing and processing the same
KR20090107805A (ko) 2008-04-10 2009-10-14 대우조선해양 주식회사 천연가스 발열량 저감방법 및 장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0713744U (ja) * 1993-08-13 1995-03-07 矢野 嘉一 シ−ト状連続体を収容した袋

Also Published As

Publication number Publication date
JPS5872800A (ja) 1983-04-30

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