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
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。Detailed Description of the Invention (Hereinafter, Field of Application, Prior Art, etc. Object of the Invention) The present invention is directed to the use of gas generated by natural evaporation in a storage tank for storing low-temperature liquids, such as liquefied natural gas (hereinafter referred to as LNG). (hereinafter referred to as BOG)
This relates to a method for temporarily reducing Conventionally, when it became necessary to temporarily reduce the amount of BOG in the storage tank due to a decrease in demand, etc.,
BOG was taken out from storage tank 1 and liquefied by a cooling liquefaction device. This not only increases equipment costs, but also costs money to operate and maintain the liquefaction equipment, leading to an increase in costs. The present invention liquefies BOG generated in a storage tank by mixing it with liquefied gas in the same storage tank, thereby solving the above-mentioned conventional drawbacks at once.
以下図について詳述すると次の通りである。 The details of the figure are as follows.
（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。(Hereinafter, the structure and operation of the invention) In the figure, reference numeral 1 denotes a storage tank for storing, for example, LNG, and inside the storage tank 1 there is a
A BOG suction part A is provided, and a BOG
The configuration is such that a BOG mixing means C provided with a discharge section B is provided. In the embodiment shown in FIG. 1, the BOG suction section A is connected to the exhaust pipe 4, the compressor 5, the gas amount control valve 6, the BOG injection pipe 3, etc.
This is an example in which the BOG discharge pipe B configured as the nozzle 2 is connected, and with this configuration, the BOG mixing means C
is configured. FIG. 2 shows that an ejector 8 is installed in the vertical direction within the storage tank 1, the upper end of the ejector 8 is configured as a BOG suction section A, and the lower end of the ejector 8 is configured as a BOG discharge section B. In this example, the BOG mixing means C is configured by installing an LNG ejection pipe 13 for ejecting LNG into the ejector 8 at the upper end of the ejector 8. In FIG. 1, for example, if it is necessary to temporarily reduce the amount of BOG generated, the BOG in the storage tank 1 is sucked out from the BOG suction part A by the compressor 5,
When it is introduced into the injection pipe 3 via the control valve 6 and injected into the liquefied gas from the nozzle 2 which is the BOG discharge section B, the BOG is cooled by the liquefied gas and liquefied. The liquefied gas 7 is heated by the mixing of BOG, but since the heat capacity of liquefied gas is large, the temperature of the liquid rises slowly, and the increase in the amount of liquefied gas generated is only a slight increase.
can be reduced. Figure 2 shows LNG
By jetting liquefied gas from the jet pipe 13 into the ejector 8 via the ejector flow rate control valve 9 and lowering the pressure inside the ejector 8 below the pressure of the BOG inside the storage tank 1, the temperature indicated by the arrow in the figure is achieved. street,
This is a method of sucking BOG and mixing it into the liquefied gas 7 to liquefy it. A portion of the liquefied gas is ejected to the ejector 8 from a liquefied gas extraction pipe 10. In actual operation, the present invention
For example, in a case where a 60,000Kl storage tank receives from a tanker, if the present invention was not applied, approximately 8,000Nm 3 /h of BOG would have to be liquefied outside the storage tank, but with the present invention, When the BOG is liquefied inside the storage tank, the amount of BOG liquefied outside the storage tank is temporarily approximately 0Nm 3 /h to 7000Nm 3 /h.
h. 11 is a liquefied gas delivery pump. In FIGS. 1 and 2 above, a part of the liquefied gas is guided from the liquefied gas extraction pipe 10 to the jet mixing nozzle 12, and the liquefied gas is spouted into the liquefied gas in the storage tank 1. 7
A method for suppressing the generation of BOG by lowering the surface temperature may also be used.
（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。(Hereinafter, the effects of the invention) Since the present invention is as described above, there is no need to provide a cooling liquefaction device separately from the storage tank, and therefore, not only is the equipment maintenance cost eliminated, but the operation is simple and short. This has the great advantage of being able to reduce the amount of BOG, and being able to respond immediately to situations where the amount of BOG is temporarily reduced.
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。
FIG. 1 and FIG. 2 are diagrams explaining the entire system. Code 1... Storage tank, 2... Nozzle, 3... Injection pipe, 4... BOG discharge pipe, 5... Compressor,
6... Gas amount control valve, 7... Liquefied gas,
8... Ejector, 9... Ejector flow rate control valve, 10... Liquefied gas take-off pipe, 11... Liquefied gas delivery pump.
Claims (1)
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。1 A BOG mixing means is provided in the storage tank, which includes a BOG suction section in the upper part of the storage tank and a BOG discharge part in the lower part of the storage tank, and BOG generated in the storage tank is removed.
A method for reducing the amount of BOG in liquefied gas in a storage tank, characterized in that the amount of BOG in the liquefied gas in a storage tank is temporarily reduced by mixing it into the liquefied gas in the same storage tank by the BOG mixing means to liquefy it, thereby temporarily reducing the amount of BOG in the tank. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16971081A JPS5872800A (en) | 1981-10-23 | 1981-10-23 | Bog reducing method of liquefied gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16971081A JPS5872800A (en) | 1981-10-23 | 1981-10-23 | Bog reducing method of liquefied gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5872800A JPS5872800A (en) | 1983-04-30 |
| JPS6132557B2 true JPS6132557B2 (en) | 1986-07-28 |
Family
ID=15891428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16971081A Granted JPS5872800A (en) | 1981-10-23 | 1981-10-23 | Bog reducing method of liquefied gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5872800A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0713744U (en) * | 1993-08-13 | 1995-03-07 | 矢野 嘉一 | A bag containing a sheet-like continuous body |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0005709D0 (en) * | 2000-03-09 | 2000-05-03 | Cryostar France Sa | Reliquefaction of compressed vapour |
| NO315293B1 (en) * | 2001-10-31 | 2003-08-11 | Procyss As | Process for absorbing vapors and gases in the control of overpressure storage tanks for liquids and application of the process |
| KR100805022B1 (en) * | 2007-02-12 | 2008-02-20 | 대우조선해양 주식회사 | LNK storage tank for LNK carriers and evaporation gas treatment method using the same |
| 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 (en) | 2008-04-10 | 2009-10-14 | 대우조선해양 주식회사 | Natural gas calorific value reduction method and device |
-
1981
- 1981-10-23 JP JP16971081A patent/JPS5872800A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0713744U (en) * | 1993-08-13 | 1995-03-07 | 矢野 嘉一 | A bag containing a sheet-like continuous body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5872800A (en) | 1983-04-30 |
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