JPH04171398A - Cargo handling system for lng - Google Patents

Cargo handling system for lng

Info

Publication number
JPH04171398A
JPH04171398A JP2294057A JP29405790A JPH04171398A JP H04171398 A JPH04171398 A JP H04171398A JP 2294057 A JP2294057 A JP 2294057A JP 29405790 A JP29405790 A JP 29405790A JP H04171398 A JPH04171398 A JP H04171398A
Authority
JP
Japan
Prior art keywords
lng
tank
gas
line
branched
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.)
Granted
Application number
JP2294057A
Other languages
Japanese (ja)
Other versions
JPH0633873B2 (en
Inventor
Yoshiaki Miyata
宮田　嘉明
Masakazu Hanamure
花牟礼　雅一
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 JP29405790A priority Critical patent/JPH0633873B2/en
Publication of JPH04171398A publication Critical patent/JPH04171398A/en
Publication of JPH0633873B2 publication Critical patent/JPH0633873B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, 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
    • F17C2223/01—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
    • 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
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/0393—Localisation of heat exchange separate using a vaporiser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/01—Purifying the fluid
    • F17C2265/015—Purifying the fluid by separating
    • 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)

Abstract

PURPOSE:To get a cargo handling system for LNG which does not need so much expense for facility, and manhour and expense for maintenance and administration by constituting a system in which LNG branched from a delivery line is vapourized through pressure reducing operation and is returned into a delivering ship tank. CONSTITUTION:Pressure of LNG in a branch line 6 branched from a delivery line 4 at a berth is reduced by means of a pressure reducing valve 7 and then the branched LNG is sent to a vaporizer 8. At this vaporizer 8, the branched LNG cools the LNG being delivered, which flows through the delivery line 4, by evaporative latent heat and then evaporates. The vaporized gas is sent to a gas-liquid separator 10 through a gas line 9 and is separated to gas and liquid. Then, the separated gas alone is sent into a ship tank 2 through a vacuum compressor 12 and a line 11. On the other hand, the separated liquid is returned to the delivery line 4 through a drain pump 13 and a line 14, and is sent to a receiving tank 3. By this constitution, it is possible to reduce expense for facility and personnel. In addition, facility for processing BOG in the side of the receiving tank 3 and the expense for it can be reduced.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、ＬＮＧタンカーから陸上の受入タンク内に運
搬して来たＬＮＧを受は入れる荷役システムに関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cargo handling system for receiving LNG transported from an LNG tanker into a receiving tank on land.

［従来の技術〕 ＬＮＧの荷役時、払出液量に見合フた量の約７０％のＢ
ＯＧを船タンク内にリターンして船タンクの負圧発生を
制御している。このため、従来は第２図に示すように、
バースに横付けされたＬＮＧタンカーｌ内の船タンク２
と受入タンク３間には、払出ライン４とは別に、受入タ
ンク３内に発生したＢＯＧをリターンガスブロア５ａで
昇圧して船タンク２内に戻すリターンガス用低温配ｖ５
を設けている。[Conventional technology] When unloading LNG, about 70% of the amount of B corresponding to the amount of discharged liquid is
OG is returned into the ship's tank to control negative pressure generation in the ship's tank. For this reason, conventionally, as shown in Figure 2,
Ship tank 2 inside LNG tanker l next to the berth
In addition to the discharging line 4, between the receiving tank 3 and the receiving tank 3, there is a low-temperature pipe v5 for return gas that pressurizes the BOG generated in the receiving tank 3 with a return gas blower 5a and returns it to the ship tank 2.
has been established.

［従来技術の課題］ このため、リターンガス用低温配管５に多大の設備費か
かかるという問題かある。[Problems with the Prior Art] Therefore, there is a problem in that the return gas low-temperature pipe 5 requires a large amount of equipment cost.

又、荷役中も含めて、通常数百メートルから数千メート
ルに及ぶリターンガス配管については、ガス洩れの防止
等を目的とした保守、管理が必要となり、この人件費も
多大である。Furthermore, the return gas piping, which normally extends from several hundred meters to several thousand meters, including during cargo handling, requires maintenance and management for the purpose of preventing gas leaks, and the labor costs involved are considerable.

本発明の目的は、設備費が安く、保守、管理に手数と費
用のかからないＬＮＧの荷役システムを提供することで
ある。An object of the present invention is to provide an LNG cargo handling system that has low equipment costs and requires no trouble and cost for maintenance and management.

［ｆｆ題を解決するための手段］ 本文明の構成は次のとおりである。[Means for solving the ff problem] The composition of this civilization is as follows.

ハースに横付けされたＬＮＧタンカーから陸上の受入タ
ンクに至る払出ラインをバースにおいて分岐し、この分
岐して得たＬＮＧを減圧することにより気化し、この気
化しＣ得たガスを払出中の船タンク内に戻して船タンク
内か払出により負圧化するのを防ｌ）−するＬＮＧの荷
役システム。The delivery line from the LNG tanker next to the hearth to the receiving tank on land is branched at the berth, and the LNG obtained by this branching is vaporized by reducing the pressure, and the gas obtained by vaporization is transferred to the tank on the ship being delivered. An LNG cargo handling system that prevents negative pressure from building up in a ship's tank by returning it to the ship's tank.

上記構成において、減圧によりＬＮＧを気化する際の気
化潜熱を利用して、払出ＬＮＧを冷却することができる
。この冷却は、受入タンク内において発生するＢＯＧの
制御を図る上で極めて有効である。In the above configuration, the delivered LNG can be cooled by using the latent heat of vaporization when LNG is vaporized by reducing the pressure. This cooling is extremely effective in controlling BOG generated within the receiving tank.

［作用］ 払出ラインから分岐したＬＮＧは、減圧作用により気化
され、このようにして気化されたガスは払出中の船タン
ク内に戻される。この結果、払出に基づく船タンク内の
減圧は防止される。[Operation] The LNG branched from the discharge line is vaporized by the depressurizing action, and the gas vaporized in this way is returned to the tank of the ship that is being discharged. As a result, depressurization in the ship's tank due to discharging is prevented.

又、前記気化時の潜熱を払出中のＬＮＧに与えることに
より、この払出中のＬ　Ｎ　Ｇを冷却する場合、受入タ
ンク内において発生ずるＢＯＧを抑制する。Furthermore, when the LNG being discharged is cooled by imparting the latent heat during vaporization to the LNG being discharged, BOG generated in the receiving tank is suppressed.

［天施例］ 第１図に本発明の実施例を示す。[Heavenly example] FIG. 1 shows an embodiment of the present invention.

符号の１はＬＮＧタンカー、２は船タンク、３は陸上の
受入タンク、４は払出ラインにして、ＬＮＧタンカー１
から払出ポンプ４ａて払出されたＬＮＧは、払出ライン
４を経由して受入タンク３内に受は入れられるもので、
通常の受入（荷役）は１２時間〜２４時間で行なわれる
。The code 1 is the LNG tanker, 2 is the ship tank, 3 is the onshore receiving tank, 4 is the delivery line, and the LNG tanker 1
The LNG discharged from the discharge pump 4a is received into the receiving tank 3 via the discharge line 4.
Normal receiving (cargo handling) takes place within 12 to 24 hours.

６は払出ライン４をハースにおいて分岐した分岐ライン
にして、この分岐ライン６て分岐したＬＮＧは、減圧弁
７て減圧され、気化器８に至る。Reference numeral 6 designates a branch line that branches off the delivery line 4 at the hearth, and the LNG branched off through this branch line 6 is depressurized through a pressure reducing valve 7 and reaches a vaporizer 8 .

この気化器８ては、前記払出ライン４内を流れる払出中
のＬＮＧを気化潜熱て冷却しながら気化し、気化したガ
スはガスライン９から気液分離器１０に至り、ここで気
液に分離され、ガスのみか真空コンプレッサー１２、ラ
イン１１を経由して船タンク２内に送り込まれる。一方
、液体はトレーンポンプ１３、ライン１４を経由して払
出ライン４に戻され、受入タンク３に至る。This vaporizer 8 vaporizes the LNG flowing through the delivery line 4 while being cooled by the latent heat of vaporization, and the vaporized gas reaches the gas-liquid separator 10 from the gas line 9, where it is separated into gas and liquid. Only gas is sent into the ship's tank 2 via a vacuum compressor 12 and a line 11. On the other hand, the liquid is returned to the dispensing line 4 via the train pump 13 and line 14, and reaches the receiving tank 3.

［本発明の効果］ 本発明は以−Ｌ、のように、受入タンク内に発生するＢ
ＯＧを船タンク内にリターンさせて該船タンク内の負圧
化を防止するのてはなく、払出中のＬＮＧの一部を船タ
ンクに近いバースにおいて分岐し、これを気化させ、こ
の気化したガスを船タンク内に戻して負圧化を防止する
ようにした。[Effects of the present invention] The present invention has the following advantages:
Instead of returning OG into the ship's tank to prevent negative pressure inside the ship's tank, a part of the LNG being discharged is branched off at a berth close to the ship's tank, and it is vaporized. Gas was returned to the ship's tank to prevent negative pressure.

この結果、従来のように船タンクと受入タンク間をリタ
ーンガス用低温配管て結ふ必要はなく。As a result, there is no need to connect the ship's tank and the receiving tank with low-temperature piping for return gas, as was the case in the past.

この分設備費の削減を図ることができると共に保守、管
理も船タンクとバース間で行うたけでよく、人件費の削
減を図ることかできる。As a result, equipment costs can be reduced, and maintenance and management only need to be carried out between the ship's tanks and the berth, resulting in a reduction in personnel costs.

又、気化潜熱で払出ＬＮＧを冷却することにより、受入
タンク内に発生するＢＯＧ輩を抑制することがてきるの
で、受入タンク側におけるＢＯＧの処Ｆ！！設備、経費
の削減も図ることがてきる。In addition, by cooling the discharged LNG with latent heat of vaporization, it is possible to suppress BOG generated in the receiving tank, so the disposal of BOG on the receiving tank side can be reduced. ! It is also possible to reduce equipment and expenses.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に係る荷役システムの説明［Ｌ第２図は
従来の荷役システムの説明図である。FIG. 1 is an explanation of a cargo handling system according to the present invention [LFIG. 2 is an explanatory diagram of a conventional cargo handling system.

Claims (1)

【特許請求の範囲】 １、バースに横付けされたＬＮＧタンカーから陸上の受
入タンクに至る払出ラインをバースにおいて分岐し、こ
の分岐して得たＬＮＧを減圧することにより気化し、こ
の気化して得たガスを払出中の船タンク内に戻して船タ
ンク内が払出により負圧化するのを防止するＬＮＧの荷
役システム。 ２、分岐して得たＬＮＧの気化潜熱により払出中のＬＮ
Ｇを冷却することにより受入タンク内に発生するＢＯＧ
の発生を制御する請求項１記載のＬＮＧの荷役システム
。[Claims] 1. A discharge line from an LNG tanker next to a berth to a receiving tank on land is branched at the berth, and the LNG obtained by this branch is vaporized by reducing the pressure, and the LNG obtained by this vaporization is vaporized. This is an LNG cargo handling system that prevents the inside of a ship's tank from becoming negative pressure by returning the gas that is being discharged into the ship's tank. 2. LN being discharged due to latent heat of vaporization of LNG obtained by branching
BOG generated in the receiving tank by cooling G
The LNG cargo handling system according to claim 1, which controls generation of LNG.
JP29405790A 1990-10-31 1990-10-31 LNG cargo handling equipment Expired - Lifetime JPH0633873B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29405790A JPH0633873B2 (en) 1990-10-31 1990-10-31 LNG cargo handling equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29405790A JPH0633873B2 (en) 1990-10-31 1990-10-31 LNG cargo handling equipment

Publications (2)

Publication Number Publication Date
JPH04171398A true JPH04171398A (en) 1992-06-18
JPH0633873B2 JPH0633873B2 (en) 1994-05-02

Family

ID=17802727

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29405790A Expired - Lifetime JPH0633873B2 (en) 1990-10-31 1990-10-31 LNG cargo handling equipment

Country Status (1)

Country Link
JP (1) JPH0633873B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002349793A (en) * 2001-05-23 2002-12-04 Mitsubishi Heavy Ind Ltd Device for storage and discharge of liquefied carbon dioxide, and system for charging liquefied carbon dioxide into sea
KR101138401B1 (en) * 2010-04-16 2012-04-26 대우조선해양 주식회사 LNG FPSO and method for treating flash gas generated in LNG carrier when LNG is unloaded form LNG FPSO to LNG carrier
JP2012207681A (en) * 2011-03-29 2012-10-25 Chugoku Electric Power Co Inc:The Boil-off gas control method for liquefied gas storage facility
JP2013152029A (en) * 2013-05-16 2013-08-08 Chugoku Electric Power Co Inc:The Method of controlling boil-off gas in liquefied gas storage facility
KR20200086965A (en) * 2019-01-10 2020-07-20 대우조선해양 주식회사 Method and system for transferring liquefied gas

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5846298A (en) * 1981-09-11 1983-03-17 Nippon Kokan Kk <Nkk> Method of unloading liquefied gas
JPS6111099U (en) * 1984-06-26 1986-01-22 石川島播磨重工業株式会社 Storage tank negative pressure prevention device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5846298A (en) * 1981-09-11 1983-03-17 Nippon Kokan Kk <Nkk> Method of unloading liquefied gas
JPS6111099U (en) * 1984-06-26 1986-01-22 石川島播磨重工業株式会社 Storage tank negative pressure prevention device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002349793A (en) * 2001-05-23 2002-12-04 Mitsubishi Heavy Ind Ltd Device for storage and discharge of liquefied carbon dioxide, and system for charging liquefied carbon dioxide into sea
KR101138401B1 (en) * 2010-04-16 2012-04-26 대우조선해양 주식회사 LNG FPSO and method for treating flash gas generated in LNG carrier when LNG is unloaded form LNG FPSO to LNG carrier
JP2012207681A (en) * 2011-03-29 2012-10-25 Chugoku Electric Power Co Inc:The Boil-off gas control method for liquefied gas storage facility
JP2013152029A (en) * 2013-05-16 2013-08-08 Chugoku Electric Power Co Inc:The Method of controlling boil-off gas in liquefied gas storage facility
KR20200086965A (en) * 2019-01-10 2020-07-20 대우조선해양 주식회사 Method and system for transferring liquefied gas

Also Published As

Publication number Publication date
JPH0633873B2 (en) 1994-05-02

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