WO2015159790A1 - 液化ガスタンクの残液排出方法 - Google Patents
液化ガスタンクの残液排出方法 Download PDFInfo
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- WO2015159790A1 WO2015159790A1 PCT/JP2015/061092 JP2015061092W WO2015159790A1 WO 2015159790 A1 WO2015159790 A1 WO 2015159790A1 JP 2015061092 W JP2015061092 W JP 2015061092W WO 2015159790 A1 WO2015159790 A1 WO 2015159790A1
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- WIPO (PCT)
- Prior art keywords
- liquefied gas
- gas tank
- liquid
- water
- residual liquid
- Prior art date
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- 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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage 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
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/035—Propane butane, 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
-
- 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
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. 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
- 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
- F17C2227/0302—Heat exchange with the fluid by heating
-
- 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
- F17C2227/0302—Heat exchange with the fluid by heating
- F17C2227/0309—Heat exchange with the fluid by heating using another fluid
- F17C2227/0316—Water heating
-
- 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
- F17C2227/04—Methods for emptying or filling
-
- 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
- F17C2227/04—Methods for emptying or filling
- F17C2227/044—Methods for emptying or filling by purging
-
- 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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/015—Facilitating maintenance
-
- 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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/048—Refurbishing
Definitions
- the present invention relates to a method for discharging residual liquid from a liquefied gas tank.
- open inspections may be conducted to confirm the effects of aging deterioration in liquefied gas tanks that store liquefied natural gas (LNG: Liquefied Natural Gas), liquefied petroleum gas (LPG: Liquefied Petroleum Gas), etc. .
- LNG Liquefied Natural Gas
- LPG Liquefied Petroleum Gas
- patent document 1 and patent document 2 as what shows the general technical level relevant to the residual liquid discharge method of a liquefied gas tank, for example.
- Patent Document 1 In the method disclosed in Patent Document 1, a large amount of nitrogen gas is required to heat the liquefied gas. Further, in the method disclosed in Patent Document 2, water is used as a pressurizing medium in the process of expelling the remaining gas, so that a pressurized water injection pump has to be specially prepared.
- the present invention has been made in view of the above-described conventional problems, and the discharge operation of the liquefied gas remaining in the liquefied gas tank can be efficiently performed in a short period of time without using a special device. It is another object of the present invention to provide a method for discharging a residual liquid from a liquefied gas tank that can significantly shorten the period during which the liquefied gas tank is stopped.
- the present invention relates to a method for discharging a residual liquid from a liquefied gas tank by injecting a liquid into the liquefied gas tank, evaporating a stored liquid remaining in the liquefied gas tank by the heat of the injected liquid, and discharging the liquid from the liquefied gas tank. It is.
- the liquid is water
- a water injection step of injecting water into the liquefied gas tank from above A residual liquid vaporization exhausting step of vaporizing the stored liquid remaining in the liquefied gas tank by the heat of water injected in the water injection step, and exhausting from the upper part of the liquefied gas tank; Even after all of the stored liquid has been vaporized in the residual liquid vaporizing step, water is continuously injected into the liquefied gas tank, and in the residual liquid vaporizing step, the cold ice of the stored liquid is taken away and the solidified ice is melted.
- a hot-up process for returning the temperature inside the liquefied gas tank to room temperature It is preferable that a draining step is performed in which an inert gas is supplied to the inside of the liquefied gas tank from the top while draining from the bottom of the liquefied gas tank whose interior has been returned to room temperature in the hot-up step.
- the vaporized gas discharged from the upper part of the liquefied gas tank in the residual liquid vaporization exhaust process is burned in a flare stack.
- the liquefied gas remaining inside the liquefied gas tank can be discharged efficiently without using special equipment in a short period of time. It is possible to achieve an excellent effect that the period for stopping the operation can be greatly shortened.
- FIG. 1 and 2 show an embodiment of a method for discharging a residual liquid from a liquefied gas tank according to the present invention.
- the feature of this embodiment is that liquid is injected into the liquefied gas tank 1 and the injected liquid is discharged. A liquid remaining in the liquefied gas tank 1 is vaporized by heat and discharged from the liquefied gas tank 1.
- the liquid is water
- a water injection process, a residual liquid vaporization exhaust process, a hot-up process, and a drainage process are performed.
- the water injection step normal temperature water is injected into the inside of the liquefied gas tank 1 from above. Since the upper part of the liquefied gas tank 1 is normally provided with a nozzle 2 such as a safety valve connecting nozzle and various spare nozzles, water injection is performed using the nozzle 2.
- a nozzle 2 such as a safety valve connecting nozzle and various spare nozzles
- the stored liquid remaining in the liquefied gas tank 1 is vaporized by the heat of the water injected in the water injection process and is exhausted from the upper part of the liquefied gas tank 1. This exhaust is also performed using the nozzle 2.
- the vaporized gas discharged from the upper part of the liquefied gas tank 1 in the residual liquid vaporizing step is burned in the flare stack 3.
- an inert gas such as nitrogen is supplied into the interior of the liquefied gas tank 1 while draining from the bottom of the liquefied gas tank 1 whose interior has been returned to room temperature in the hot-up step.
- an introduction nozzle 4 for introducing the stored liquid into the liquefied gas tank 1 and a discharge nozzle 5 for discharging the stored liquid from the liquefied gas tank 1 to the outside are usually arranged. Therefore, drainage is performed using the discharge nozzle 5.
- the stored liquid is extracted from the discharge nozzle 5 to the maximum, and the remaining liquid amount of the stored liquid is minimized.
- the stored liquid remaining in the liquefied gas tank 1 is vaporized by the heat (sensible heat and latent heat) of the water injected in the water injection step, and is exhausted from the nozzle 2 disposed on the liquefied gas tank 1 (residual liquid). Evaporative exhaust process). The vaporized gas discharged from the upper part of the liquefied gas tank 1 in the residual liquid vaporization exhaust process is burned in the flare stack 3.
- the water is continuously injected into the liquefied gas tank 1, and the ice solidified by taking away the cold heat of the stored liquid in the residual liquid vaporizing and exhausting process gradually.
- the temperature inside the liquefied gas tank 1 is returned to room temperature (hot-up process).
- the temperature inside the liquefied gas tank 1 is measured by a temperature sensor (not shown). If the temperature inside the liquefied gas tank 1 measured by the temperature sensor is higher than 0 ° C., the ice melts. It can be judged that it became water.
- the time required to discharge all the liquefied gas is significantly shortened as compared with the conventional method for discharging the remaining liquid in the liquefied gas tank that relies on natural heat input.
- the time period during which the liquefied gas tank 1 is stopped can be shortened even if the time required for the subsequent replacement with inert gas and air and the time required for the open inspection work itself are included. Therefore, the operation efficiency of the liquefied gas tank 1 is improved.
- the residual liquid amount is 800 kl
- the conventional liquid gas tank residual liquid discharge method that relies on natural heat input requires about 150 days (5 months) for the residual liquid treatment and hot up, In this embodiment, the time is shortened to about 10 to 20 days.
- the discharge operation of the liquefied gas remaining in the liquefied gas tank 1 can be efficiently performed in a short period without using a special device, and the period during which the liquefied gas tank 1 is suspended for open inspection can be greatly shortened. .
- the liquid is water
- a water injection process, a residual liquid vaporization exhaust process, a hot-up process, and a drainage process are performed.
- water injection can be performed by using a nozzle 2 such as a safety valve connection nozzle or various spare nozzles that are normally arranged at the upper part of the liquefied gas tank 1.
- the vaporized gas can also be exhausted using the nozzle 2.
- the hot-up process water can be injected using the nozzle 2 as in the water injection process.
- drainage step drainage can be performed using the discharge nozzle 5 that is normally disposed on the bottom side surface of the liquefied gas tank 1. That is, the liquefied gas can be discharged without modifying the existing liquefied gas tank 1 or additionally installing special equipment.
- the vaporized gas discharged from the upper part of the liquefied gas tank 1 in the residual liquid vaporizing and exhausting process is combusted in the flare stack 3, the vaporized gas is reliably processed, and the vaporized gas is ignited and a fire is generated. There is no worry to do.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
前記液化ガスタンクの内部にその上部から水を注入する注水工程と、
該注水工程で注入される水の熱により前記液化ガスタンク内に残る貯留液を気化させ、該液化ガスタンクの上部から排気する残液気化排気工程と、
該残液気化排気工程で前記貯留液が全て気化した後も前記液化ガスタンクの内部への水の注入を継続し、前記残液気化排気工程で貯留液の冷熱を奪って固化した氷を融かしつつ、液化ガスタンクの内部の温度を常温に戻すホットアップ工程と、
該ホットアップ工程で内部が常温に戻された液化ガスタンクの底部から排水しつつ、該液化ガスタンクの内部にその上部から不活性ガスを供給する排水工程と
が行われることが好ましい。
2 ノズル
3 フレアスタック
5 排出ノズル
Claims (3)
- 液化ガスタンクの内部に液体を注入し、該注入された液体の熱により前記液化ガスタンク内に残る貯留液を気化させて該液化ガスタンクから排出することを特徴とする液化ガスタンクの残液排出方法。
- 前記液体は水であり、
前記液化ガスタンクの内部にその上部から水を注入する注水工程と、
該注水工程で注入される水の熱により前記液化ガスタンク内に残る貯留液を気化させ、該液化ガスタンクの上部から排気する残液気化排気工程と、
該残液気化排気工程で前記貯留液が全て気化した後も前記液化ガスタンクの内部への水の注入を継続し、前記残液気化排気工程で貯留液の冷熱を奪って固化した氷を融かしつつ、液化ガスタンクの内部の温度を常温に戻すホットアップ工程と、
該ホットアップ工程で内部が常温に戻された液化ガスタンクの底部から排水しつつ、該液化ガスタンクの内部にその上部から不活性ガスを供給する排水工程と
が行われる請求項1記載の液化ガスタンクの残液排出方法。 - 前記残液気化排気工程で液化ガスタンクの上部から排出される気化ガスをフレアスタックで燃焼させる請求項2記載の液化ガスタンクの残液排出方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2015247053A AU2015247053B2 (en) | 2014-04-15 | 2015-04-09 | Method for discharging liquid remaining in liquefied gas tank |
KR1020167031440A KR101957695B1 (ko) | 2014-04-15 | 2015-04-09 | 액화 가스 탱크의 잔액 배출 방법 |
US15/291,841 US10408385B2 (en) | 2014-04-15 | 2016-10-12 | Method of discharging residual liquid in liquefied gas tank |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-083246 | 2014-04-15 | ||
JP2014083246A JP6409311B2 (ja) | 2014-04-15 | 2014-04-15 | 液化ガスタンクの残液排出方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US15/291,841 Continuation US10408385B2 (en) | 2014-04-15 | 2016-10-12 | Method of discharging residual liquid in liquefied gas tank |
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WO2015159790A1 true WO2015159790A1 (ja) | 2015-10-22 |
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PCT/JP2015/061092 WO2015159790A1 (ja) | 2014-04-15 | 2015-04-09 | 液化ガスタンクの残液排出方法 |
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US (1) | US10408385B2 (ja) |
JP (1) | JP6409311B2 (ja) |
KR (1) | KR101957695B1 (ja) |
AU (1) | AU2015247053B2 (ja) |
WO (1) | WO2015159790A1 (ja) |
Families Citing this family (1)
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WO2024105810A1 (ja) * | 2022-11-16 | 2024-05-23 | 川崎重工業株式会社 | 液化ガス設備 |
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JPH1030795A (ja) * | 1996-07-16 | 1998-02-03 | Ishikawajima Harima Heavy Ind Co Ltd | 液化ガス低温貯蔵タンクのホットアップ方法及び装置 |
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JP2011236929A (ja) | 2010-05-06 | 2011-11-24 | Shinko Engineering & Maintenance Co Ltd | Lngサテライト設備 |
-
2014
- 2014-04-15 JP JP2014083246A patent/JP6409311B2/ja active Active
-
2015
- 2015-04-09 AU AU2015247053A patent/AU2015247053B2/en not_active Ceased
- 2015-04-09 KR KR1020167031440A patent/KR101957695B1/ko active IP Right Grant
- 2015-04-09 WO PCT/JP2015/061092 patent/WO2015159790A1/ja active Application Filing
-
2016
- 2016-10-12 US US15/291,841 patent/US10408385B2/en not_active Expired - Fee Related
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JPS4863314A (ja) * | 1971-11-17 | 1973-09-03 | ||
JPH08261396A (ja) * | 1995-03-24 | 1996-10-11 | Ishikawajima Harima Heavy Ind Co Ltd | 低温貯槽の残液気化促進構造 |
JPH1030795A (ja) * | 1996-07-16 | 1998-02-03 | Ishikawajima Harima Heavy Ind Co Ltd | 液化ガス低温貯蔵タンクのホットアップ方法及び装置 |
JP2000161593A (ja) * | 1998-11-26 | 2000-06-16 | Gasuken:Kk | 液化石油ガス貯槽の残留ガス処理方法及び該処理用装置 |
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KR20160145100A (ko) | 2016-12-19 |
JP2015203455A (ja) | 2015-11-16 |
AU2015247053B2 (en) | 2018-02-08 |
AU2015247053A1 (en) | 2016-10-20 |
US10408385B2 (en) | 2019-09-10 |
JP6409311B2 (ja) | 2018-10-24 |
US20170030525A1 (en) | 2017-02-02 |
KR101957695B1 (ko) | 2019-03-14 |
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