JPH0633872B2 - Precooling method for LNG receiving piping - Google Patents
Precooling method for LNG receiving pipingInfo
- Publication number
- JPH0633872B2 JPH0633872B2 JP62277671A JP27767187A JPH0633872B2 JP H0633872 B2 JPH0633872 B2 JP H0633872B2 JP 62277671 A JP62277671 A JP 62277671A JP 27767187 A JP27767187 A JP 27767187A JP H0633872 B2 JPH0633872 B2 JP H0633872B2
- Authority
- JP
- Japan
- Prior art keywords
- lng
- bog
- tank
- pipe
- receiving pipe
- 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 - Lifetime
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
- F17C13/004—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
- 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
- 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
- F17C2227/0157—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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/07—Actions triggered by measured parameters
- F17C2250/072—Action when predefined value is reached
- F17C2250/077—Action when predefined value is reached when empty
-
- 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
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、ＬＮＧ基地で使用されるＬＮＧ受入配管の
予冷保持方法の改良に関し、設備費および運転費の低減
と安全性の向上等をはかるようにしたものである。Description: [Industrial field of application] The present invention relates to an improvement of a pre-cooling holding method for an LNG receiving pipe used in an LNG base, and is intended to reduce equipment cost and operation cost and improve safety. It was done like this.
〔従来の技術〕 ＬＮＧ（液化天然ガス）基地にあっては、ＬＮＧ貯蔵用
のＬＮＧ低温タンク（以下、単にＬＮＧタンクとす
る。）が設置され、ＬＮＧ船との間に設けられたＬＮＧ
受入配管を介して輸送されたＬＮＧ低温液をＬＮＧタン
クに入れるようにしている。[Prior Art] In an LNG (liquefied natural gas) base, an LNG low temperature tank for storing LNG (hereinafter, simply referred to as an LNG tank) is installed, and an LNG provided between the LNG carrier and the LNG carrier.
The LNG low temperature liquid transported via the receiving pipe is put in the LNG tank.
このようなＬＮＧ基地のＬＮＧ受入配管は、ＬＮＧ受入
れの際、内部を流れるＬＮＧが１６０℃程度の極低温で
あるため、ＬＮＧ船と接続後、常温状態のＬＮＧ受入配
管を使用して受入れを行なうことができない。The LNG receiving pipe of such an LNG base receives the LNG receiving pipe at room temperature after connecting with the LNG ship because the LNG flowing inside the LNG receiving pipe has an extremely low temperature of about 160 ° C. I can't.
このため従来、ＬＮＧ受入配管内にＬＮＧタンクの低温
ＬＮＧをそのヘッドを利用して満液状態として常時冷却
保持するようにしたり、ＬＮＧタンクの低温ＬＮＧを循
環ポンプを設置してＬＮＧ受入配管内を循環させてＬＮ
Ｇタンクに回収するようにしている。Therefore, conventionally, the low temperature LNG of the LNG tank is kept in a liquid-filled state by using the head so that it is constantly cooled and held, or the low temperature LNG of the LNG tank is installed in the LNG receiving pipe by a circulation pump. Circulate and LN
It collects in the G tank.
〔発明が解決しようとする問題点〕 ところが、いずれの予冷保持方法にあってもＬＮＧ受入
配管内にＬＮＧの低温液を満液状態とするため外部から
の熱でＢＯＧとなり易く、多量のＢＯＧの発生によって
ＬＮＧ中のメタンのみが気化して組成が変化するという
問題がある。[Problems to be Solved by the Invention] However, in any of the pre-cooling holding methods, since the LNG low-temperature liquid is filled in the LNG receiving pipe, heat from the outside easily causes BOG, and a large amount of BOG There is a problem that only methane in LNG is vaporized and the composition changes due to generation.
また、低温液を循環する場合には、相当大容量の循環ポ
ンプが必要となり、設備費が嵩むとともに、運転経費も
嵩んでしまうという問題がある。Further, when circulating the low-temperature liquid, a circulation pump having a considerably large capacity is required, which causes a problem that the facility cost and the operating cost increase.
特に、ＬＮＧ船からの受入れての頻度が１〜２ヶ月に１
回程度と少ない場合には、上記の２つの問題が一層大き
くなってしまう。In particular, the frequency of acceptance from LNG vessels is 1 to every 1 to 2 months.
If the number of times is small, the above two problems become more serious.
さらに、ＬＮＧ受入配管は径が大きく長さも長いことが
多く、内部に入る低温液の量も相当多くなるため、保安
や安全についても相当な注意が必要である。Further, the LNG receiving pipe is often large in diameter and long in length, and the amount of the low temperature liquid that enters the LNG receiving pipe is considerably large. Therefore, great care must be taken regarding safety and safety.
この発明はかかる従来技術に鑑みてなされたもので、Ｌ
ＮＧタンクから発生する低温ＢＯＧを利用して予冷保持
を行なうことで、設備費や運転費が低減でき、ＬＮＧの
組成変化が少なく、保安や安全上も有利なＬＮＧ受入配
管の予冷保持方法を提供しようとするものである。The present invention has been made in view of the above-mentioned prior art.
By pre-cooling and holding using low temperature BOG generated from NG tank, equipment cost and operating cost can be reduced, LNG composition change is small, and a pre-cooling holding method for LNG receiving pipe that is advantageous in safety and safety is provided. Is what you are trying to do.
上記問題点を解決するためこの発生のＬＮＧ受入配管の
予冷保持方法は、ＬＮＧ受入配管を介してＬＮＧ低温液
をＬＮＧタンクに受入れたのち、ＬＮＧの受入端からＬ
ＮＧタンクに至るＬＮＧ受入配管内に入っている全ての
ＬＮＧ低温液を排出回収して、このＬＮＧ受入配管にＬ
ＮＧタンクで発生するＢＯＧを吸引するＢＯＧ圧縮機の
吸引側を接続してＬＮＧタンクで発生する低温のＢＯＧ
を導入して低温気体で保冷するようにしたことを特徴と
するものである。In order to solve the above-mentioned problems, the pre-cooling holding method of the LNG receiving pipe of this occurrence is as follows. After receiving the LNG low temperature liquid into the LNG tank through the LNG receiving pipe,
All the LNG low temperature liquid contained in the LNG receiving pipe leading to the NG tank is discharged and collected, and L is put into this LNG receiving pipe.
Low temperature BOG generated in LNG tank by connecting the suction side of BOG compressor that sucks BOG generated in NG tank
Is introduced to keep cold with a low temperature gas.
ＬＮＧ受入配管内を空にし、この中にＬＮＧタンクで発
生する低温のＢＯＧを導いて予冷保持に利用するように
しており、ＬＮＧ受入配管内に残留した低温液を回収す
るための小型ポンプを設置し、ＢＯＧの吸引側の流路を
変えるバルブの切替えだけで予冷ができ、既にＢＯＧと
なったものを利用するのでＬＮＧの組成変化が少なく、
ＬＮＧ受入配管内の可燃物も少なく安全である。The inside of the LNG receiving pipe is emptied, and the low temperature BOG generated in the LNG tank is introduced into this to be used for pre-cooling maintenance, and a small pump is installed to collect the low temperature liquid remaining in the LNG receiving pipe. However, precooling can be done simply by switching the valve that changes the flow path on the suction side of BOG, and since the one that has already become BOG is used, the composition change of LNG is small,
It is safe because there are few combustibles in the LNG receiving pipe.
以下、この発明の一実施例を図面を参照しながら具体的
に説明する。An embodiment of the present invention will be specifically described below with reference to the drawings.
第１図はこの発明のＬＮＧ受入配管の予冷保持方法の一
実施例にかかる予冷状態の説明図である。FIG. 1 is an explanatory view of a precooling state according to an embodiment of a method for precooling an LNG receiving pipe of the present invention.
この発明のＬＮＧ受入配管の予冷保持方法が適用される
ＬＮＧ基地では、第１図に示すように、二重殻構造等の
低温タンクであるＬＮＧタンク１が設置されており、Ｌ
ＮＧ受入配管２を介してＬＮＧタンク１の下部および上
部からＬＮＧを受入れることができるように下部受入配
管２ａおよび上部受入配管２ｂが分岐して設けてある。At the LNG base to which the method for precooling and holding the LNG receiving pipe of the present invention is applied, as shown in FIG. 1, an LNG tank 1 which is a low temperature tank such as a double shell structure is installed, and
A lower receiving pipe 2a and an upper receiving pipe 2b are provided in a branched manner so that LNG can be received from the lower and upper parts of the LNG tank 1 via the NG receiving pipe 2.
また、ＬＮＧタンク１の上部には、ＬＮＧタンク１内の
ＢＯＧ（蒸発ガス）を排出するためのＢＯＧ配管３が接
続され、他端部は２つに分岐されてＢＯＧ圧縮機４への
ＢＯＧ排出配管３ａとＬＮＧ船へのＢＯＧ戻し配管３ｂ
とで構成されている。In addition, a BOG pipe 3 for discharging BOG (evaporated gas) in the LNG tank 1 is connected to the upper part of the LNG tank 1, and the other end is branched into two to discharge the BOG to the BOG compressor 4. Piping 3a and BOG return piping 3b to the LNG carrier
It consists of and.
これらＬＮＧ受入配管２およびＢＯＧ配管３には、それ
ぞれＬＮＧ船との接続部にＬＮＧ用受入弁５およびＢＯ
Ｇ用戻し弁６が設けられている。The LNG receiving pipe 2 and the BOG pipe 3 are respectively connected to the LNG ship at the connection part with the LNG receiving valve 5 and the BO.
A G return valve 6 is provided.
また、ＬＮＧ受入配管２の下部受入配管２ａのＬＮＧタ
ンク１の近傍には、ＬＮＧ受入弁７が設けられる一方、
ＢＯＧ配管３のＢＯＧ排出配管３ａとＢＯＧ戻し配管３
ｂの分岐部よりＬＮＧタンク１側には、ＢＯＧ排出弁８
が設けられている。Further, an LNG receiving valve 7 is provided near the LNG tank 1 on the lower receiving pipe 2a of the LNG receiving pipe 2, while
BOG discharge pipe 3a of BOG pipe 3 and BOG return pipe 3
The BOG discharge valve 8 is provided on the LNG tank 1 side from the branch portion of b.
Is provided.
さらに、ＬＮＧ受入配管２とＢＯＧ配管３のＬＮＧ船と
の接続部近傍のＬＮＧ用受入弁５およびＢＯＧ用戻し弁
６のＬＮＧタンク１側には、予冷保持用のバイパス配管
９が連結されて両配管２，３を連通できるようになって
おり、中間部に予冷用弁１０が介装してある。Further, a bypass pipe 9 for precooling is connected to both sides of the LNG receiving valve 5 and the BOG return valve 6 in the vicinity of the connection between the LNG receiving pipe 2 and the BOG pipe 3 to the LNG vessel, and a precooling holding bypass pipe 9 is connected. The pipes 2 and 3 can be communicated with each other, and a precooling valve 10 is provided in an intermediate portion.
また、ＬＮＧ受入配管２の中間部には、小型のＬＮＧ回
収ポンプ１１が接続してあり、ＬＮＧ船からのＬＮＧ受
入後、ＬＮＧ受入配管２のＬＮＧ用受入弁５とＬＮＧ受
入弁７との間に入っているＬＮＧをＬＮＧタンク１等に
回収できるようになっている。Further, a small LNG recovery pump 11 is connected to an intermediate portion of the LNG receiving pipe 2 and, after receiving the LNG from the LNG ship, between the LNG receiving valve 5 and the LNG receiving valve 7 of the LNG receiving pipe 2. The LNG in the tank can be collected in the LNG tank 1 or the like.
このようなＬＮＧ基地において、ＬＮＧ船等からＬＮＧ
をＬＮＧタンク１に受入れる場合には、ＬＮＧ受入配管
２のＬＮＧ用受入弁５およびＬＮＧ受入弁７を開くとと
もに、ＢＯＧ配管３のＢＯＧ用戻し弁６およびＢＯＧ排
出弁８を開く一方、予冷用弁１０を閉じた状態とする。At such an LNG base, LNG ships, etc.
When the LNG tank 1 is received, the LNG receiving valve 5 and the LNG receiving valve 7 of the LNG receiving pipe 2 are opened, and the BOG return valve 6 and the BOG discharge valve 8 of the BOG pipe 3 are opened, while the precooling valve is opened. 10 is closed.
すると、ＬＮＧ船等から送られるＬＮＧの低温液がＬＮ
Ｇ受入配管２を介してＬＮＧタンク１に貯められる。そ
して、ＬＮＧタンク１内の上部空間のＢＯＧはＢＯＧ配
管３を介してＬＮＧ船等に戻され、ＬＮＧの運転圧力が
上昇しないようにする。Then, the low temperature liquid of LNG sent from the LNG carrier etc.
It is stored in the LNG tank 1 via the G receiving pipe 2. Then, the BOG in the upper space in the LNG tank 1 is returned to the LNG ship or the like via the BOG pipe 3 so that the operating pressure of the LNG does not rise.
次に、ＬＮＧ船等から受入完了後、次回の受入れに備え
てＬＮＧ受入配管２を予冷保持する場合には、従来のよ
うに、低温液を循環したり、満液状態とせず、ＬＮＧタ
ンク１で発生する低温のＢＯＧを利用する。Next, when the LNG receiving pipe 2 is pre-cooled and held in preparation for the next receiving after the completion of receiving from the LNG ship or the like, the LNG tank 1 is not circulated or filled with the low temperature liquid as in the conventional case. The low temperature BOG generated in the above is used.
そこで、ＬＮＧの受入時とは逆に開いていた弁を閉じる
とともに、閉じていた弁を開く。すなわち、ＬＮＧ受入
配管２のＬＮＧ用受入弁５およびＬＮＧ受入弁７を閉じ
るとともに、ＢＯＧ配管３のＢＯＧ用戻し弁６およびＢ
ＯＧ排出弁８も閉じる一方、バイパス配管９の予冷用弁
１０を開いた状態とする。Therefore, the opened valve is closed and the closed valve is opened, contrary to the time of receiving the LNG. That is, the LNG receiving valve 5 and the LNG receiving valve 7 of the LNG receiving pipe 2 are closed, and the BOG return valve 6 and B of the BOG pipe 3 are closed.
While the OG discharge valve 8 is also closed, the precooling valve 10 of the bypass pipe 9 is kept open.
そして、まず、ＬＮＧ受入配管２のＬＮＧ用受入弁５と
ＬＮＧ受入弁７との間に満液状態となっているＬＮＧを
ＬＮＧ回収ポンプ１１によりＬＮＧタンク１等に回収
し、空の状態とする。Then, first, LNG that is in a liquid-filled state between the LNG receiving valve 5 and the LNG receiving valve 7 of the LNG receiving pipe 2 is collected in the LNG tank 1 or the like by the LNG collecting pump 11 and made empty. .
この後、ＬＮＧタンク１で発生する低温（−１２０〜−
１４０℃）のＢＯＧをＬＮＧ受入配管２の上部受入配管
２ｂから導入し、ＬＮＧ受入配管２からバイパス配管９
を介してＢＯＧ戻し配管３ｂおよびＢＯＧ排出管３ａか
らＢＯＧ圧縮機４に送り、系外に排出し燃料等として利
用する。Then, the low temperature (-120 to-) generated in the LNG tank 1 is generated.
140 ° C.) BOG is introduced from the upper receiving pipe 2b of the LNG receiving pipe 2 and the LNG receiving pipe 2 to the bypass pipe 9
Via the BOG return pipe 3b and the BOG discharge pipe 3a to the BOG compressor 4 and discharged to the outside of the system for use as fuel or the like.
すると、ＬＮＧ受入配管２のＬＮＧ用受入弁５とＬＮＧ
受入弁７との間にＬＮＧが流入するため低温状態に保持
される。Then, the LNG receiving valve 5 of the LNG receiving pipe 2 and the LNG
Since LNG flows in between the receiving valve 7 and the receiving valve 7, the temperature is kept low.
このように低温のＢＯＧを用いてＬＮＧ受入配管２の予
冷保持を行なうようにしているので、ＬＮＧ受入配管２
からの熱侵入があってもＢＯＧ圧縮機４に入る前のＢＯ
Ｇ温度が上昇するだけであり、ＬＮＧタンク１内のＬＮ
Ｇに熱が伝達されず、従来の低温液で予冷保持する場合
に比べ、ＢＯＧの発生を減少でき、ＬＮＧタンク１のＬ
ＮＧの組成変化を少なくすることができる。Since the LNG receiving pipe 2 is precooled and held by using the low-temperature BOG as described above, the LNG receiving pipe 2
BO before entering the BOG compressor 4 even if there is heat intrusion from the
The G temperature only rises, and the LN in the LNG tank 1
Since heat is not transferred to G, the amount of BOG generated can be reduced compared to the case of precooling and holding with a conventional low temperature liquid, and L of the LNG tank 1
The change in composition of NG can be reduced.
また、ＬＮＧの低温液で予冷保持する場合に比べ、気体
であるＢＯＧで予冷保持を行なうので、ＬＮＧ受入配管
２内に入っている可燃性流体の量が大幅に減少でき、保
安上安全性が増大する。In addition, as compared with the case of precooling and holding with a low temperature liquid of LNG, precooling and holding is performed with gas BOG, so the amount of flammable fluid in the LNG receiving pipe 2 can be greatly reduced, and safety is improved for safety. Increase.
さらに、ＬＮＧの低温液を循環ポンプで循環する場合に
は、大容量の循環ポンプを設置し、常時運転しなければ
ならないが、ＢＯＧで予冷保持する場合には、小型のＬ
ＮＧ回収ポンプ１１を設置し、ＬＮＧ受入配管２内のＬ
ＮＧを回収する間だけ使用すれば良く、設置費および運
転費を大幅に削減でき、特に、ＬＮＧの受入頻度が１〜
２月に１度程度と少ない場合に有効である。Furthermore, when circulating a low temperature liquid of LNG with a circulation pump, a large capacity circulation pump must be installed and always operated, but when precooling is maintained with BOG, a small L pump is used.
NG recovery pump 11 is installed and L in LNG receiving pipe 2
It can be used only while collecting NG, which can significantly reduce installation costs and operating costs.
It is effective when it is as small as once in February.
なお、上記実施例では、ＬＮＧ船からのＬＮＧの受入れ
の場合で説明したが、この場合に限らず低温液の受入れ
の場合に広く適用できる。In addition, in the said Example, although the case of receiving LNG from an LNG ship was demonstrated, it is not limited to this case and can be widely applied to the case of receiving a low temperature liquid.
以上、一実施例とともに具体的に説明したようにこの発
明のＬＮＧ受入配管の予冷保持方法によれば、ＬＮＧ受
入配管を空にし、この中にＬＮＧタンクで発生する低温
のＢＯＧを導入して予冷保持するようにしたので、ＬＮ
Ｇタンク内のＬＮＧの組成変化を少なくできるととも
に、ＬＮＧ受入配管内の可燃物を大幅に減少でき、保安
上安全性が向上する。As described above in detail with reference to the embodiment, according to the precooling holding method of the LNG receiving pipe of the present invention, the LNG receiving pipe is emptied, and low temperature BOG generated in the LNG tank is introduced into the precooling. I decided to hold it, so LN
The composition change of LNG in the G tank can be reduced, and the combustibles in the LNG receiving pipe can be significantly reduced, which improves safety and security.
また、設備の変更をほとんど必要とせず、小型の回収ポ
ンプを設置するだけで良く、設備費や運転費が少なくて
済む。In addition, there is almost no need to change the equipment, only a small recovery pump needs to be installed, and the equipment and operating costs can be reduced.
第１図はこの発明のＬＮＧ受入配管の予冷保持方法の一
実施例にかかる予冷状態の説明図である。 １……ＬＮＧタンク、２……ＬＮＧ受入配管、２ａ……
下部受入配管、２ｂ……上部受入配管、３……ＢＯＧ配
管、３ａ……ＢＯＧ排出管、３ｂ……ＢＯＧ戻し管、４
……ＢＯＧ圧縮機、５……ＬＮＧ用受入弁、６……ＢＯ
Ｇ用戻し弁、７……ＬＮＧ受入弁、８……ＢＯＧ排出
弁、９……バイパス配管、１０……予冷用弁、１１……
ＬＮＧ回収ポンプFIG. 1 is an explanatory view of a precooling state according to an embodiment of a method for precooling an LNG receiving pipe of the present invention. 1 ... LNG tank, 2 ... LNG receiving pipe, 2a ...
Lower receiving pipe, 2b ... Upper receiving pipe, 3 ... BOG pipe, 3a ... BOG discharge pipe, 3b ... BOG return pipe, 4
...... BOG compressor, 5 ... LNG receiving valve, 6 ... BO
Return valve for G, 7 ... LNG receiving valve, 8 ... BOG discharge valve, 9 ... bypass piping, 10 ... precooling valve, 11 ...
LNG recovery pump
Claims (1)
ＮＧタンクに受入れたのち、ＬＮＧの受入端からＬＮＧ
タンクに至るＬＮＧ受入配管内に入っている全てのＬＮ
Ｇ低温液を排出回収して、このＬＮＧ受入配管にＬＮＧ
タンクで発生するＢＯＧを吸引するＢＯＧ圧縮機の吸引
側を接続してＬＮＧタンクで発生する低温のＢＯＧを導
入して低温気体で保冷するようにしたことを特徴とする
ＬＮＧ受入配管の予冷保持方法。1. A LNG low temperature liquid is passed through an LNG receiving pipe to L
After receiving in the NG tank, LNG is received from the receiving end of LNG.
All LNs in the LNG receiving pipe leading to the tank
G Low-temperature liquid is discharged and recovered, and LNG is received in this LNG receiving pipe.
A method for precooling and holding an LNG receiving pipe, characterized in that a suction side of a BOG compressor for sucking BOG generated in a tank is connected to introduce a low temperature BOG generated in an LNG tank to keep cold with a low temperature gas. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62277671A JPH0633872B2 (en) | 1987-11-02 | 1987-11-02 | Precooling method for LNG receiving piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62277671A JPH0633872B2 (en) | 1987-11-02 | 1987-11-02 | Precooling method for LNG receiving piping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01120500A JPH01120500A (en) | 1989-05-12 |
| JPH0633872B2 true JPH0633872B2 (en) | 1994-05-02 |
Family
ID=17586678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62277671A Expired - Lifetime JPH0633872B2 (en) | 1987-11-02 | 1987-11-02 | Precooling method for LNG receiving piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633872B2 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4581243B2 (en) * | 2000-12-22 | 2010-11-17 | 株式会社Ｉｈｉ | Low temperature tank equipment |
| AU2004288122B2 (en) * | 2003-11-03 | 2008-08-07 | Fluor Technologies Corporation | LNG vapor handling configurations and methods |
| JP2005299819A (en) * | 2004-04-13 | 2005-10-27 | Iwatani Internatl Corp | Low-temperature liquefied gas filling device |
| JP4838040B2 (en) * | 2006-04-25 | 2011-12-14 | 千代田化工建設株式会社 | Cooling and circulating method for liquefied gas equipment |
| JP2007298052A (en) * | 2006-04-27 | 2007-11-15 | Ihi Corp | Method and apparatus for cooling and holding liquefied gas receiving pipe |
| KR100781868B1 (en) * | 2006-08-07 | 2007-12-05 | 대우조선해양 주식회사 | Marine lng regasification system and method for interrupting its operation |
| JP5917302B2 (en) * | 2012-06-05 | 2016-05-11 | 日揮株式会社 | Liquid material receiving method and liquid material receiving equipment |
| JP6252069B2 (en) * | 2013-09-24 | 2017-12-27 | 株式会社Ihi | Tank equipment |
| CN110285322A (en) * | 2019-07-19 | 2019-09-27 | 中冶焦耐(大连)工程技术有限公司 | A kind of LNG pipeline pre-cooling technique using release igniting |
| CN111779967A (en) * | 2020-06-28 | 2020-10-16 | 中国寰球工程有限公司 | Wharf platform pipeline cold insulation system and method of offshore LNG receiving station |
| JP2023148215A (en) * | 2022-03-30 | 2023-10-13 | 川崎重工業株式会社 | Tank facility |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5997399A (en) * | 1982-11-24 | 1984-06-05 | Mitsubishi Heavy Ind Ltd | Liquid feed line pre-cooling method for lng storage apparatus |
-
1987
- 1987-11-02 JP JP62277671A patent/JPH0633872B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01120500A (en) | 1989-05-12 |
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