JPH04171399A - Cargo handling system for lng - Google Patents

Cargo handling system for lng

Info

Publication number
JPH04171399A
JPH04171399A JP2294058A JP29405890A JPH04171399A JP H04171399 A JPH04171399 A JP H04171399A JP 2294058 A JP2294058 A JP 2294058A JP 29405890 A JP29405890 A JP 29405890A JP H04171399 A JPH04171399 A JP H04171399A
Authority
JP
Japan
Prior art keywords
gas
lng
line
separated
returned
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.)
Pending
Application number
JP2294058A
Other languages
Japanese (ja)
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 JP2294058A priority Critical patent/JPH04171399A/en
Publication of JPH04171399A publication Critical patent/JPH04171399A/en
Pending 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
    • 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
    • F17C2227/03—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

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 separated to gas and liquid after evaporative cooling, and then the separated gas is returned to a delivering ship tank and the separated liquid is returned to the delivery line. CONSTITUTION:LNG which has been branched from a delivery line 4 at a berth and arrived at the inside of a vaporizer 7 is vaporized by heat exchanging with the sea water suctioned by means of a sea water pump 8 and a sea water line 9. Then, the LNG branched at a cooling line 10 cools the gas delivered from the vaporizer 7 by being mixed with the gas in the mixer 11. The gas cooled in this way is sent to a gas-liquid separator 12 and is separated to gas and liquid there. The separated gas is returned to a delivering ship tank 2 through a return gas line 13 and prevents negative pressure of the ship tank 2. On the other hand, the separated liquid is returned to the delivery line 4 through a drain line 14. By this constitution, expense for facility and personnel can be reduced. Furthermore, it is possible to suppress amount of BOG to be generated in the ship tank 2.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、ＬＮＧタンカーから陸りの受入タンク内に連
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 [Field of Industrial Application] The present invention relates to a cargo handling system for receiving LNG carried from an LNG tanker into a receiving tank on land.

［従来の技術］ ＬＮＧの荷役時、払出液是に見合った量の約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て
昇圧して船タンク２内に戻すリターンガス用低温配管５
を設けている。[Prior art] When unloading LNG, about 70% of the amount of B corresponding to the 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 5 for return gas that pressurizes the BOG generated in the receiving tank 3 using a return gas blower 5a and returns it to the ship's 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に多大の設備費が
かかるという問題がある。[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、管理か必要となり、この人件費も
多大である。In addition, 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 for this are also large.

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.

［課題を解決するための手段］ 本発明の構成は次のとおりである。[Means to solve the problem] The configuration of the present invention is as follows.

バースに横付けされたＬＮＧタンカーから陸りの受入タ
ンクに１ら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を海水等を熱源とする気化器に導い
て気化すると共にこの気化したガスにＬＮＧを混合ｌ、
て冷却し、この冷却したガスを気液分離器に導いて２液
の分離を行い、ガスは払出中の船タンクに戻してこの負
圧化を防止し、分離液は払出ラインに戻すＬＮＧの荷役
システム。A discharge line from the LNG tanker next to the berth to the receiving tank on land is branched at the berth, and the LNG obtained by this branch is led to a vaporizer that uses seawater as a heat source to vaporize it. Mixing LNG with gas,
The cooled gas is led to a gas-liquid separator to separate the two liquids, the gas is returned to the ship's tank being discharged to prevent this negative pressure, and the separated liquid is returned to the LNG discharge line. Cargo handling system.

［竹田］ 払出ラインから分岐したＬＮＧは、気化器に導かれ、こ
こで海水等により気化される。このようにして気化した
ガスの温度は高いので、直接船タンク内に戻すと船タン
ク内の温度か上封し、ＢＯＧの発生を促進させるのて、
ＬＮＧをガス中に混合しノ”（ガスの温度を下げる。但
し、このように１゜て温度を一部けたガス中には、重質
炭化水素分のミス１−化し・たものか含まれＣいるので
、これを気液分離器に導き、ここて気液の分離を行い、
ガスのみ？払出中の船タンクに戻し、分離液は払出ライ
ンに戻す。[Takeda] LNG branched from the delivery line is led to a vaporizer, where it is vaporized by seawater or the like. The temperature of the gas vaporized in this way is high, so if it is directly returned to the ship's tank, the temperature inside the ship's tank will be sealed, promoting the generation of BOG.
By mixing LNG into the gas, the temperature of the gas is lowered. However, the gas whose temperature has been lowered by 1° in this way may contain some of the heavy hydrocarbons that have been converted into Since there is C, this is led to a gas-liquid separator, where the gas and liquid are separated.
Gas only? The separated liquid is returned to the ship's tank where it is being discharged, and the separated liquid is returned to the discharge line.

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

符号の１はバースに横付けされたＬＮＧタンカー、２は
船タンク、３は陸−Ｌの受入タンク、４は払出ライン、
４ａは払出ポンプにして、船タンク２内のＬＮＧは、払
出ポンプ４ａで汲み上げられ、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。The code 1 is the LNG tanker next to the berth, 2 is the ship tank, 3 is the land-L receiving tank, 4 is the delivery line,
4a is a delivery pump, and the LNG in the ship's tank 2 is pumped up by the delivery pump 4a, and received into the receiving tank 3 via the delivery line 4.

６は払出ライン４をパースにおいて分岐した分岐ライン
、７は気化器にして、この気化器７内に至った分岐ＬＮ
Ｇは、海水ポンプ８、海水ライン９て汲み上げられた海
水と熱交換して気化する。6 is a branch line that branches from the payout line 4 at Perth, 7 is a vaporizer, and a branch LN that reaches inside this vaporizer 7
G is vaporized by exchanging heat with seawater pumped up by a seawater pump 8 and a seawater line 9.

１０は分岐ライン６を更に分岐した冷却ラインに１ノで
、この冷却ライン１０て分岐されたＬＮＧは、前記気化
器７から出たガス中に混合器１１で混合されてガスを冷
却する。このようにして冷却されたガスは、気液分離器
１２に奎り、ここて気液に分離され、ガスはリターンカ
スライン１３から払出中の船タンク２内に戻され、この
負圧化を防止する。一方、分離液は、ドレーンライン１
４から払出ライン４に戻される。10 is a cooling line further branched from the branch line 6, and the LNG branched through this cooling line 10 is mixed with the gas discharged from the vaporizer 7 in a mixer 11 to cool the gas. The thus cooled gas is sent to the gas-liquid separator 12, where it is separated into gas and liquid, and the gas is returned from the return gas line 13 into the ship's tank 2, which is being discharged, to reduce the pressure. To prevent. On the other hand, the separated liquid is drain line 1
4 and then returned to the payout line 4.

［本発明の効果］ 本発明は以−Ｙ、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１トするのではなく、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゛〔負圧化な防
止するようにした、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で結ぶ必要はな
く、この分設備費の削減を図ることかできると共に保守
、／１′理も船タンクとバース間で行うたけてよく、人
件費の削減を図ることかできる。[Effects of the present invention] The present invention has the following advantages:
Rather than returning OG to the ship's tank to prevent negative pressure inside the ship's tank, a portion of the LNG being discharged is branched off at a berth close to the ship's tank, and it is vaporized. The returned gas is returned to the ship's tank to prevent negative pressure.As a result, there is no need to connect the ship's tank and the receiving tank with low-temperature piping for return gas, which is required in the past, which reduces equipment costs. In addition to this, maintenance and maintenance can be done between the ship's tank and the berth, and labor costs can be reduced.

又、気化したガスを冷却してから船タンク内に戻すため
、船タンク内に発生するＢＯＧ量を抑制することができ
る。Furthermore, since the vaporized gas is cooled and then returned to the ship's tank, the amount of BOG generated in the ship's tank can be suppressed.

【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図。 第２図は従来の荷役システムの説明図である。 FIG. 1 is an explanatory diagram of a cargo handling system according to the present invention. FIG. 2 is an explanatory diagram of a conventional cargo handling system.

Claims (1)

【特許請求の範囲】[Claims] 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を海水等を熱源とする気化器に導いて
気化すると共にこの気化したガスにＬＮＧを混合して冷
却し、この冷却したガスを気液分離器に導いて気液の分
離を行い、ガスは払出中の船タンクに戻してこの負圧化
を防止し、分離液は払出ラインに戻すＬＮＧの荷役シス
テム。The delivery line from the LNG tanker next to the berth to the receiving tank on land is branched at the berth, and the LNG obtained by this branch is guided to a vaporizer that uses seawater as a heat source to vaporize it, and this vaporized gas is converted into LNG. This cooled gas is led to a gas-liquid separator to separate the gas and liquid, and the gas is returned to the ship tank being discharged to prevent this negative pressure, and the separated liquid is passed to the discharge line. A cargo handling system for returning LNG.
JP2294058A 1990-10-31 1990-10-31 Cargo handling system for lng Pending JPH04171399A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2294058A JPH04171399A (en) 1990-10-31 1990-10-31 Cargo handling system for lng

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2294058A JPH04171399A (en) 1990-10-31 1990-10-31 Cargo handling system for lng

Publications (1)

Publication Number Publication Date
JPH04171399A true JPH04171399A (en) 1992-06-18

Family

ID=17802741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2294058A Pending JPH04171399A (en) 1990-10-31 1990-10-31 Cargo handling system for lng

Country Status (1)

Country Link
JP (1) JPH04171399A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013253623A (en) * 2012-06-05 2013-12-19 Jgc Corp Method and equipment for receiving liquid material
KR20140143038A (en) * 2013-06-05 2014-12-15 현대중공업 주식회사 A Treatment System Of Liquefied Natural Gas
EP1838991B2 (en) † 2005-01-21 2017-02-15 Cryostar SAS Natural gas supply method and apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1838991B2 (en) † 2005-01-21 2017-02-15 Cryostar SAS Natural gas supply method and apparatus
JP2013253623A (en) * 2012-06-05 2013-12-19 Jgc Corp Method and equipment for receiving liquid material
KR20140143038A (en) * 2013-06-05 2014-12-15 현대중공업 주식회사 A Treatment System Of Liquefied Natural Gas

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