JPS62237200A - Gas generation method - Google Patents

Gas generation method

Info

Publication number
JPS62237200A
JPS62237200A JP61078144A JP7814486A JPS62237200A JP S62237200 A JPS62237200 A JP S62237200A JP 61078144 A JP61078144 A JP 61078144A JP 7814486 A JP7814486 A JP 7814486A JP S62237200 A JPS62237200 A JP S62237200A
Authority
JP
Japan
Prior art keywords
gas
pipe
liquefied gas
heated
navigation
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
JP61078144A
Other languages
Japanese (ja)
Inventor
Yoshiharu Tanaka
田中　嘉春
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.)
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Mitsui Engineering and Shipbuilding 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 Mitsui Engineering and Shipbuilding Co Ltd filed Critical Mitsui Engineering and Shipbuilding Co Ltd
Priority to JP61078144A priority Critical patent/JPS62237200A/en
Publication of JPS62237200A publication Critical patent/JPS62237200A/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
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • 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
    • 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
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • 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

Landscapes

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

Abstract

PURPOSE:To make it possible to perform continuous running for a long time and reduce failure by making the same kind of heated gas as liquefied gas spout into the liquefied gas. CONSTITUTION:The LNG gas or the like having collected in the top section of a cargo tank 1 is compressed by a gas compressor 3 through a pipe 2 and then heated by a gas heating device 4. A blowoff device 11 for loading navigation is arranged to a position lower than a loading navigation liquid level L1 and a blowoff device 12 for ballast navigation to a position lower than a ballast navigation liquid level L2 in the tank 1. Heated gas is fed to the device 11 through the pipe 13 forked from a pipe 2A and in addition the device 12 through a pipe 14. During loading navigation, a valve 16 opens to blow gas off from the device 11 into the liquefied gas in the tank 1 gasifying the liquefied gas enforcedly. And during ballast navigation, the valve 16 closes and a valve 7 opens to blow gas off from the device 12 into the liquefied gas gasifying the liquefied gas enforcedly.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はガス発生方法、特に、ＬＮＧ船のカーゴタンク
（Ｃａｒｇｏ　ｔａｎｋ）内のＬＮＧ　（液化天然ガス
）を機関燃料の一部に使用する際に前記カーゴタンク内
で強制的にボイルオフガスを発生させる方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gas generation method, particularly when LNG (liquefied natural gas) in a cargo tank of an LNG ship is used as part of the engine fuel. The present invention relates to a method for forcibly generating boil-off gas within the cargo tank.

〔従来技術〕[Prior art]

ＬＮＧ船では、燃料油よりＬＮＧの方が安価な場合、第
３図に示すように、カーゴタンク１で発生したＬＮＧガ
スを管２を経てガスコンプレッサー３に送り、更に、ガ
ス加熱器４によって加熱したあと、機関燃料の一部とし
て図示しないボイラに供給している。In an LNG ship, when LNG is cheaper than fuel oil, the LNG gas generated in the cargo tank 1 is sent to the gas compressor 3 through the pipe 2, and then heated by the gas heater 4, as shown in Figure 3. After that, it is supplied to a boiler (not shown) as part of the engine fuel.

ところで、例えばボイラの負荷が増加した場合に、カー
ゴタンクｌの頂部に溜ったＬＮＧガスだけでは絶対量が
不足する場合はカーゴタンク１内に設けたポンプ５で汲
み上げたＬＮＧ液をベーパライザー６でガス化して補充
することが行われている。By the way, for example, when the load on the boiler increases and the absolute amount of LNG gas accumulated at the top of the cargo tank 1 is insufficient, the LNG liquid pumped up by the pump 5 installed in the cargo tank 1 is pumped up by the vaporizer 6. Gasification and replenishment are being carried out.

しかし、この方法ではベーパライザー６にＬＮＧ液を送
るためにＬＮＧポンプ５を稼動させる必要があるが、こ
のＬＮＧポンプ５は故障することが多々ある。また、Ｌ
ＮＧポンプ５の軸受の寿命が短いことから長期間連続運
転ができないという問題があった。However, in this method, it is necessary to operate the LNG pump 5 in order to send the LNG liquid to the vaporizer 6, but this LNG pump 5 often breaks down. Also, L
Since the life of the bearing of the NG pump 5 is short, there is a problem that continuous operation cannot be performed for a long period of time.

〔発明の目的〕[Purpose of the invention]

そこで、本発明は既存の設備を大幅に改造することなく
、長期間の連続運転が可能であり、かつ、故障の少ない
ガス発生方法を提供することを目的とするものである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a gas generation method that allows continuous operation for a long period of time without significantly modifying existing equipment and is less likely to cause failures.

〔発明の構成〕[Structure of the invention]

すなわち、本発明にかかるガス発生方法は、液化ガス中
に該ガスと同質の加熱ガスを吹き出させて前記液化ガス
を強制的にガス化させることを特徴とするものである。That is, the gas generation method according to the present invention is characterized in that the liquefied gas is forcibly gasified by blowing out a heated gas of the same quality as the liquefied gas.

〔実施例〕〔Example〕

以下、図面により本発明の方法について説明する。 The method of the present invention will be explained below with reference to the drawings.

第１図に示すように、カーゴタンクｌの頂部に溜ったＬ
ＮＧガスは管２を経てガスコンプレッサー３で圧縮され
たあと、ガス加熱器４によって加熱され、機関燃料の一
部として図示しないボイラに供給されることは従来例と
同様である。As shown in Figure 1, L accumulated at the top of the cargo tank L
As in the conventional example, the NG gas is compressed by a gas compressor 3 through a pipe 2, heated by a gas heater 4, and then supplied to a boiler (not shown) as part of engine fuel.

本発明は上記ガス加熱器４によって加熱されたＬＮＧガ
スの一部を使用することに特徴があるものである。The present invention is characterized in that a portion of the LNG gas heated by the gas heater 4 is used.

上記カーゴタンク１内に積荷航液位Ｌ１より、若干、下
方に積荷肌用吹出し装置１１を設置し、更にバラスト航
液位Ｌ２より、若干、下方にバラスト肌用吹出し装置１
２を配設する。また、上記ガス加熱器４で加熱されたＬ
ＮＧガスをボイラに供給する管２Ａから分岐された管１
３を前記積荷肌用吹出し装置１１に連通させ、更に、前
記分岐管１３から分岐させた管１４を前記バラスト肌用
吹出し装置１２に連通させる。前記分岐管１３にはガス
コンプレッサー３の入口管のガス圧を一定にする流量制
御弁１５および開閉弁１６が、この順序に配置されてい
る。また、分岐管１４には開閉弁１７が配設されている
。A cargo skin blowing device 11 is installed in the cargo tank 1 slightly below the cargo liquid level L1, and a ballast skin blowing device 1 is installed slightly below the ballast liquid level L2.
2 will be placed. In addition, L heated by the gas heater 4
Pipe 1 branched from pipe 2A that supplies NG gas to the boiler
3 is communicated with the load skin blowing device 11, and further, a pipe 14 branched from the branch pipe 13 is communicated with the ballast skin blowing device 12. A flow control valve 15 and an on-off valve 16 for keeping the gas pressure in the inlet pipe of the gas compressor 3 constant are arranged in this order in the branch pipe 13. Further, an on-off valve 17 is provided in the branch pipe 14 .

さて、積荷航行時には、分岐管１３の開閉弁１６が開放
され、分岐管１４の開閉弁１７は閉じられる。上記ガス
加熱器４によって加熱されたＬＮＧガスの一部は分岐管
工３を通って積荷肌用吹出し装置１１に達し、該積荷肌
用吹出し装置１１に設けられた図示しない細孔からカー
ゴタンク１内のＬＮＧ液中に吹き出される。積荷肌用吹
出し装置１１の細孔から吹き出された加熱ＬＮＧガスに
触れてカーゴタンク１内のＬＮＧ液の一部は気化してカ
ーゴタンク１の頂部に溜まったのち、その大部分は機関
燃料としてボイラに供給される。Now, during cargo voyage, the on-off valve 16 of the branch pipe 13 is opened, and the on-off valve 17 of the branch pipe 14 is closed. A part of the LNG gas heated by the gas heater 4 passes through the branch pipework 3 and reaches the cargo skin blowing device 11, and passes through a not-shown pore provided in the cargo skin blowing device 11 into the cargo tank 1. It is blown out into the LNG liquid inside. A portion of the LNG liquid in the cargo tank 1 is vaporized by contact with the heated LNG gas blown out from the pores of the cargo skin blow-off device 11 and accumulated at the top of the cargo tank 1, and most of it is used as engine fuel. Supplied to the boiler.

他方、バラスト航行時は、分岐管１３の開閉弁１６が閉
じられ、分岐管１４の開閉弁１７が　−開放される。そ
して、上記ガス加熱器４によって加熱されたＬＮＧガス
の一部は分岐管１４を通ってバラスト肌用吹出し装置１
２に至り、該バラスト肌用吹出し装置１２に設けられた
細孔（図示せず）からカーゴタンク１内のＬＮＧ液中に
吹き出される。そして、積荷航行時と同様に加熱ＬＮＧ
ガスに触れて気化したＬＮＧガスの大部分は機関燃料と
してボイラに供給される。On the other hand, during ballast navigation, the on-off valve 16 of the branch pipe 13 is closed, and the on-off valve 17 of the branch pipe 14 is opened. A part of the LNG gas heated by the gas heater 4 passes through the branch pipe 14 to the ballast skin blowing device 1.
2, and is blown into the LNG liquid in the cargo tank 1 from the pores (not shown) provided in the ballast skin blowing device 12. Then, as in the case of cargo voyage, heated LNG
Most of the LNG gas that vaporizes upon contact with the gas is supplied to the boiler as engine fuel.

〔発明の効果〕〔Effect of the invention〕

上記のように、本発明は、液化ガス中に該ガスと同質の
加熱ガスを吹き出させて前記液化ガスを強制的にガス化
させるので、カーゴタンク内のＬＮＧポンプを稼動させ
る必要が全くなく、当初から装備され、使用されている
ガスコンプレッサーやガス加熱器を使用して加熱された
ＬＮＧガスをＬＮＧ液中に吹き出させて強制的にボイル
オフガスを発生させるものであるから長期間の連続運転
が可能であり、また、故障がほとんど生じないという利
点がある。As described above, the present invention forcibly gasifies the liquefied gas by blowing out a heated gas of the same quality as the liquefied gas, so there is no need to operate the LNG pump in the cargo tank. It is equipped from the beginning and uses the gas compressor and gas heater used to blow heated LNG gas into the LNG liquid to forcibly generate boil-off gas, so it can be operated continuously for a long period of time. possible, and has the advantage of almost no failures.

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

第１図は本発明方法の実施に使用する装置の概略図、第
２図はその要部拡大図、第３図は従来の装置の概略図で
ある。 １・・・カーゴタンク、３・・・ガスコンプレッサー、
４・・・ガス加熱器、１１・・・積荷肌用吹出し装置、
１２・・・バラスト肌用吹出し装置。FIG. 1 is a schematic diagram of an apparatus used to carry out the method of the present invention, FIG. 2 is an enlarged view of the main part thereof, and FIG. 3 is a schematic diagram of a conventional apparatus. 1... Cargo tank, 3... Gas compressor,
4... Gas heater, 11... Cargo skin blowing device,
12...Ballast skin blowing device.

Claims (1)

【特許請求の範囲】[Claims] 液化ガス中に該ガスと同質の加熱ガスを吹き出させて前
記液化ガスを強制的にガス化させることを特徴とするガ
ス発生方法。A gas generation method comprising: blowing out a heated gas of the same quality as the liquefied gas into the liquefied gas to forcibly gasify the liquefied gas.
JP61078144A 1986-04-07 1986-04-07 Gas generation method Pending JPS62237200A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61078144A JPS62237200A (en) 1986-04-07 1986-04-07 Gas generation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61078144A JPS62237200A (en) 1986-04-07 1986-04-07 Gas generation method

Publications (1)

Publication Number Publication Date
JPS62237200A true JPS62237200A (en) 1987-10-17

Family

ID=13653691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61078144A Pending JPS62237200A (en) 1986-04-07 1986-04-07 Gas generation method

Country Status (1)

Country Link
JP (1) JPS62237200A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003175891A (en) * 2001-08-24 2003-06-24 Cryostar-France Sa Natural gas fuel supply system
US7438012B2 (en) 2004-03-17 2008-10-21 Wartsila Finland Oy Gas supply arrangement of a marine vessel and method of providing gas in a marine vessel
CN103443435A (en) * 2011-03-11 2013-12-11 大宇造船海洋株式会社 Method for driving system for supplying fuel to marine structure having re-iquefying device and high-<wbr/>pressure natural gas injection engine
CN104121114A (en) * 2013-04-24 2014-10-29 现代重工业株式会社 System for supplying liquefied natural gas fuel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003175891A (en) * 2001-08-24 2003-06-24 Cryostar-France Sa Natural gas fuel supply system
US7438012B2 (en) 2004-03-17 2008-10-21 Wartsila Finland Oy Gas supply arrangement of a marine vessel and method of providing gas in a marine vessel
CN103443435A (en) * 2011-03-11 2013-12-11 大宇造船海洋株式会社 Method for driving system for supplying fuel to marine structure having re-iquefying device and high-<wbr/>pressure natural gas injection engine
EP2685077A1 (en) * 2011-03-11 2014-01-15 Daewoo Shipbuilding & Marine Engineering Co., Ltd. Method for driving system for supplying fuel to marine structure having re-liquefying device and high-pressure natural gas injection engine
EP2685077A4 (en) * 2011-03-11 2014-11-05 Daewoo Shipbuilding & Marine Method for driving system for supplying fuel to marine structure having re-liquefying device and high-pressure natural gas injection engine
CN104121114A (en) * 2013-04-24 2014-10-29 现代重工业株式会社 System for supplying liquefied natural gas fuel
JP2014215032A (en) * 2013-04-24 2014-11-17 ヒュンダイ ヘビー インダストリーズ カンパニー リミテッド LNG fuel supply system

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