JP2909269B2 - How to maintain low pressure cooling of low temperature liquid transfer tube - Google Patents
How to maintain low pressure cooling of low temperature liquid transfer tubeInfo
- Publication number
- JP2909269B2 JP2909269B2 JP3202896A JP20289691A JP2909269B2 JP 2909269 B2 JP2909269 B2 JP 2909269B2 JP 3202896 A JP3202896 A JP 3202896A JP 20289691 A JP20289691 A JP 20289691A JP 2909269 B2 JP2909269 B2 JP 2909269B2
- Authority
- JP
- Japan
- Prior art keywords
- low
- temperature liquid
- pipe
- horizontal
- liquid transfer
- 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 - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Description
【０００１】[0001]
【産業上の利用分野】本発明は、新規な低温液搬送管の
微圧冷却保持方法に係り、特に距離が長く且つ高低差の
大きい低温液搬送管の移送停止中の温度保持方法として
微圧冷却保持方法を管の異常な振動を発生させることな
く用いることを可能にする低温液搬送管の微圧冷却保持
方法である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel low-temperature cooling / holding method for a low-temperature liquid transfer pipe, and more particularly to a low-pressure cooling method for holding a low-temperature liquid transfer pipe having a long distance and a large difference in height during a transfer stop. This is a low-pressure cooling and holding method for a low-temperature liquid transfer tube that enables the cooling and holding method to be used without generating abnormal vibration of the tube.
【０００２】[0002]
【従来の技術】先に本出願人は、低温液搬送管の移送停
止中の温度保持方法として微圧冷却保持方法を提供し
た。この微圧冷却保持方法は図２に示されるようにＬＰ
ＧあるいはＬＮＧ等の低温液を移送する低温液搬送管１
に低温液を移送した後も低温液を残留させて冷却してお
くものである。また、低温液搬送管１の外周部に保冷材
が被覆されているが外熱を受けて管内に残留された低温
液は蒸発して蒸発ガスが発生することになる。そこで、
低温液搬送管１にその一部を立ち上げて所定の高さ位置
に水平管部２を形成し、この水平管部２内に低温液搬送
管１内に発生する蒸気ガスを捕捉して蒸発ガスの発生量
を検出すると共に捕捉された蒸気ガスを再液化処理を施
すことにより、水平管部１以外の低温液搬送管１内に常
時低温液を残留させることで冷却保持を達成するもので
ある。具体的には低温液搬送管１にはこれを上方に折り
返して立ち上げ管部３を形成し、これら立ち上げ管部３
内に上記水平管部２が連続されて形成されることにな
る。この水平管部２の上部には蒸気ガス抜出し管５が接
続される。また、この蒸気抜出し管５には圧力調整弁６
が設けられて水平管部２内の蒸気圧の制御ができるよう
に構成されている。蒸気ガス抜出し管５は図示されない
が蒸気ガス還流ラインを介して再液化処理系等へと接続
されている。2. Description of the Related Art The applicant of the present invention has provided a micro-pressure cooling and holding method as a method for holding a temperature while the transfer of a low-temperature liquid transfer pipe is stopped. As shown in FIG.
Low temperature liquid transfer pipe 1 for transferring low temperature liquid such as G or LNG
After the low-temperature liquid has been transferred, the low-temperature liquid remains and is cooled. Further, although the outer periphery of the low-temperature liquid transfer pipe 1 is covered with a cooling material, the low-temperature liquid remaining in the pipe due to external heat evaporates to generate evaporative gas. Therefore,
A part of the low-temperature liquid transfer pipe 1 is raised to form a horizontal pipe 2 at a predetermined height, and the horizontal pipe 2 captures vapor gas generated in the low-temperature liquid transfer pipe 1 and evaporates. By detecting the amount of generated gas and performing a reliquefaction process on the captured vapor gas, the low-temperature liquid is always left in the low-temperature liquid transport pipe 1 other than the horizontal pipe section 1 to achieve cooling and holding. is there. More specifically, the low-temperature liquid transfer pipe 1 is turned upward to form a rising pipe section 3, and these rising pipe sections 3 are formed.
The horizontal tube portion 2 is formed continuously therein. A steam gas extraction pipe 5 is connected to an upper portion of the horizontal pipe section 2. Further, a pressure regulating valve 6 is connected to the steam extraction pipe 5.
Is provided so that the vapor pressure in the horizontal pipe section 2 can be controlled. Although not shown, the steam gas extraction pipe 5 is connected to a reliquefaction processing system or the like via a steam gas reflux line.
【０００３】図２のように形成された低温液搬送管３に
おいては、主に低温液搬送管１内に滞留する低温液は外
部からの入熱を受けて一部が沸騰し、その蒸気ガスが気
泡となって立上げ管部３を浮上して水平管部２内に溜ま
ることになる。水平管部２内に液面が形成される。この
液面は特に気化が盛んとなり気化面７として働く。ま
た、水平管部２内に所定圧以上の蒸気ガスが捕捉された
場合には圧力調整弁６を開放作動させ再液化処理系へ排
出されると共に低温液搬送源あるいは低温液タンクから
低温液を低温液搬送管１に補充することにより、冷却保
持を達成することができる。In the low-temperature liquid transport pipe 3 formed as shown in FIG. 2, the low-temperature liquid mainly staying in the low-temperature liquid transport pipe 1 receives a heat input from the outside, and a part of the low-temperature liquid boils. Becomes air bubbles and floats up the rising tube portion 3 and accumulates in the horizontal tube portion 2. A liquid surface is formed in the horizontal tube 2. This liquid level is particularly active for vaporization and serves as a vaporizing surface 7. When the vapor gas having a predetermined pressure or more is trapped in the horizontal pipe section 2, the pressure regulating valve 6 is opened to be discharged to the reliquefaction processing system, and the low temperature liquid is supplied from the low temperature liquid transport source or the low temperature liquid tank. By replenishing the low-temperature liquid transport tube 1, cooling and holding can be achieved.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、その距
離が長く且つ高低差の大きい低温液搬送管においては、
図２の微圧冷却保持方法を用いると水平管部２の落差が
大きくなり、この落差が低温液搬送管３の水頭圧を大き
くする。このため、低温液搬送管３内で入熱を受けて沸
騰した低温液の蒸気が気泡となって立上げ管部３を浮上
する時、気泡が断熱膨張して成長することになる。ま
た、上記水平管部２は低温液搬送管にかなり大きな距離
を隔てて形成することになり、低温液搬送管に発生する
気泡が立上げ管部３を成長しながら浮上する際に管の異
常な振動を発生させるという問題があった。However, in a low-temperature liquid transfer pipe having a long distance and a large height difference,
When the micro-pressure cooling and holding method shown in FIG. 2 is used, the head of the horizontal tube portion 2 becomes large, and this head increases the head pressure of the low-temperature liquid transport tube 3. For this reason, when the vapor of the low-temperature liquid that has received heat and boiled in the low-temperature liquid transfer pipe 3 becomes bubbles and floats on the riser section 3, the bubbles grow adiabatically and expand. In addition, since the horizontal pipe section 2 is formed at a large distance from the low-temperature liquid transport pipe, when bubbles generated in the low-temperature liquid transport pipe rise while growing up the riser pipe section 3, an abnormality in the pipe occurs. There was a problem of generating a great vibration.
【０００５】本発明の目的は、上記課題を解決し、距離
が長く且つ高低差の大きい低温液搬送管において、管の
異常な振動を発生させることなく微圧冷却保持方法を用
いる方法を提供することにある。An object of the present invention is to solve the above-mentioned problems and to provide a method of using a low-pressure cooling and holding method without causing abnormal vibration of a low-temperature liquid transfer tube having a long distance and a large difference in height. It is in.
【０００６】[0006]
【課題を解決するための手段】低温液搬送管と水平管部
とを接続している低温液搬送管の立上げ管部を階段状に
屈曲させ、且つその各段の水平部に開閉弁を設けて上記
水平管部とは別に独立した水平管部を複数形成し、上記
低温液搬送管の不使用時に上記開閉弁を閉作動して各独
立した水平管部に別の系統から低温液を供給しつつ各水
平管部から蒸気ガスを排出させるようにした。 The rising pipe section of the low-temperature liquid transfer pipe connecting the low-temperature liquid transfer pipe and the horizontal pipe section is bent stepwise, and an open / close valve is provided at the horizontal section of each stage. And a plurality of independent horizontal pipe sections are formed separately from the horizontal pipe sections. When the low-temperature liquid transfer pipe is not used, the on-off valve is closed to operate independently.
The vapor gas is discharged from each horizontal tube while the low-temperature liquid is supplied from another system to the standing horizontal tube .
【０００７】[0007]
【作用】上記方法によれば、低温液搬送管の移送停止中
は各開閉弁を閉作動してあるため、各段の水平管部には
各々次段の開閉弁より上流の低温液搬送管内で気化した
蒸気が溜まってそれぞれ気化面を形成する。各独立した
水平管部には別の系統から低温液を供給しつつ各水平管
部から蒸気を排出させるように構成してあるので、各段
が独立して微圧冷却保持されることになる。According to the above-mentioned method, since the on-off valves are closed while the transfer of the low-temperature liquid transfer pipe is stopped, the horizontal pipes of each stage are provided inside the low-temperature liquid transfer pipe upstream of the next-stage on-off valve. The vaporized vapor accumulates in each of them to form vaporized surfaces. Each independent horizontal pipe section is configured to supply low-temperature liquid from another system while discharging steam from each horizontal pipe section, so that each stage is independently held under low pressure cooling. Will be.
【０００８】また、上記方法によれば、低温液搬送管の
立上げ管部を階段状に屈曲させて形成することにより、
各段の落差が十分に小さくなる。したがって各段の水頭
圧は十分に小さく気泡の成長による管の異常な振動を発
生させるおそれがない。Further, according to the above method, the rising pipe portion of the low-temperature liquid transport pipe is formed by bending in a stepwise manner.
The head of each step becomes sufficiently small. Therefore, the head pressure of each stage is sufficiently small, and there is no possibility that abnormal vibration of the pipe due to the growth of bubbles will occur.
【０００９】[0009]
【実施例】以下、本発明の実施例を添付図面に基づいて
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１０】図１において、低温液搬送管１は階段状に
屈曲されて主に複数の水平管部１１と複数の立上げ管部
１０とを有することになる。各段の水平部には開閉弁１
２が設けられ独立した水平管部１１が複数形成されてい
ると共に低い水平管部１６が複数形成されている。各段
の水平管部１１には低温液を微量補給するための低温液
注入管１３がそれぞれ接続されている。低温液注入管１
３はそれぞれ補給弁１４を介して低温液補給ライン１５
へ接続され、補給ライン１５は図示されないが低温液供
給源に接続されている。また、各段の水平管部１１の上
側管壁には蒸気を個別に排出するための蒸気抜出し管５
が導入されている。蒸気抜出し管５にはそれぞれ圧力調
整弁６が設けられ、圧力調整弁６の下流側はそれぞれ蒸
気還流ラインを介して処理系へと接続されている。In FIG. 1, the low-temperature liquid transfer pipe 1 is bent in a stepwise manner and mainly has a plurality of horizontal pipes 11 and a plurality of riser pipes 10. On-off valve 1 at the horizontal part of each stage
2, a plurality of independent horizontal tube portions 11 are formed, and a plurality of low horizontal tube portions 16 are formed. A low-temperature liquid injection pipe 13 for replenishing a small amount of low-temperature liquid is connected to the horizontal pipe section 11 at each stage. Low temperature liquid injection tube 1
3 is a low-temperature liquid supply line 15 via a supply valve 14 respectively.
The supply line 15 is connected to a low-temperature liquid supply source (not shown). In addition, a steam extraction pipe 5 for individually discharging steam is provided on the upper pipe wall of the horizontal pipe section 11 of each stage.
Has been introduced. Each of the steam extraction pipes 5 is provided with a pressure regulating valve 6, and the downstream side of the pressure regulating valve 6 is connected to a processing system via a steam recirculation line.
【００１１】上記のように各段に区画された低温液補給
ライン１５においては、各段が独立して以下のような働
きをすることになる。即ち、下流側の開閉弁１２の上流
側で入熱を受けて蒸発した蒸気ガスは上流側の開閉弁１
２の下流の水平管部１１に溜まって気化面７を形成す
る。圧力調整弁６を開放作動させ蒸気ガスの一部を処理
系へ排出すると共に補給弁１４を開放作動させて微量の
低温液を補給することにより、気化面７を一定の高さに
保持することができる。水平管部１１内に気化面を保持
させることにより、気化面の面積が十分に大きく保たれ
るので、区画内での気化に伴う低温液搬送管３内圧の上
昇を防ぐことができる。このような働きが各段において
独立に働くことにより、低温液搬送管３全体に亘って低
温液搬送管の移送停止中の温度保持が達成されることに
なる。In the low-temperature liquid replenishment line 15 divided into each stage as described above, each stage operates independently as follows. That is, the steam gas evaporated by receiving heat on the upstream side of the downstream on-off valve 12 is supplied to the upstream on-off valve 1.
The vaporization surface 7 is formed in the horizontal pipe section 11 downstream of the pipe 2. Opening the pressure regulating valve 6 to discharge a part of the vapor gas to the processing system and opening the replenishing valve 14 to supply a small amount of low-temperature liquid, thereby maintaining the vaporized surface 7 at a constant height. Can be. By holding the vaporizing surface in the horizontal tube portion 11, the area of the vaporizing surface is kept sufficiently large, so that it is possible to prevent the internal pressure of the low-temperature liquid transport pipe 3 from increasing due to vaporization in the compartment. Such a function works independently in each stage, so that the temperature of the low-temperature liquid transport pipe 3 can be maintained while the transfer of the low-temperature liquid transport pipe is stopped.
【００１２】また、各段において立上げ管部１０の落差
は十分に小さく、低い水平管部１６にかかる水頭圧は十
分に小さい。したがって、各段において気泡の成長によ
る管の異常な振動を発生させるおそれがない。即ち、低
温液搬送管１全体に亘って気泡の成長による管の異常な
振動を発生させるおそれがない。In each stage, the head of the rising pipe 10 is sufficiently small, and the head pressure applied to the low horizontal pipe 16 is sufficiently small. Therefore, there is no possibility of generating abnormal vibration of the tube due to the growth of bubbles in each stage. That is, there is no possibility that abnormal vibration of the pipe due to the growth of bubbles will occur over the entire low-temperature liquid transport pipe 1.
【００１３】[0013]
【発明の効果】本発明は、次の如き優れた効果を発揮す
る。The present invention exhibits the following excellent effects.
【００１４】（１）工場の高いフェンス、一般道路等を
越える落差の高い低温液搬送管において、管の異常な振
動を発生させることなく微圧冷却保持方法を採用でき
る。(1) In a low-temperature liquid transfer pipe having a high head over a high fence, a general road, or the like in a factory, a low-pressure cooling and holding method can be adopted without generating abnormal vibration of the pipe.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の方法を説明するための概略図である。FIG. 1 is a schematic diagram for explaining a method of the present invention.
【図２】従来の微圧冷却保持方法を説明するための概略
図である。FIG. 2 is a schematic diagram for explaining a conventional method of maintaining and maintaining a low-pressure cooling.
１ 低温液搬送管 １０ 立上げ管部 １１ 水平管部 １２ 開閉弁 DESCRIPTION OF SYMBOLS 1 Low-temperature liquid conveyance pipe 10 Start-up pipe part 11 Horizontal pipe part 12 On-off valve
───────────────────────────────────────────────────── フロントページの続き (72)発明者 扇 弘将 東京都江東区豊洲三丁目２番16号 石川 島播磨重工業株式会社 豊洲総合事務所 内 (58)調査した分野(Int.Cl.6，ＤＢ名) F17D 1/08 F17D 1/20 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiromasa Ogi 3-2-16-1 Toyosu, Koto-ku, Tokyo Ishikawa-jima-Harima Heavy Industries, Ltd. Toyosu General Office (58) Field surveyed (Int. Cl. 6 , (DB name) F17D 1/08 F17D 1/20
Claims (1)
残留させて保冷するに際して上記低温液搬送管の一部を
立ち上げて水平管部を形成すると共にこの水平管部に蒸
気ガスを捕捉するようにした低温液搬送管の微圧冷却保
持方法において、上記低温液搬送管の立上げ管部を階段
状に屈曲させ、且つその各段の水平管部に開閉弁を設け
て上記水平管部とは別に独立した水平管部を複数形成
し、上記低温液搬送管の不使用時に上記開閉弁を閉作動
して各独立した水平管部に別の系統から低温液を供給し
つつ各水平管部から蒸気ガスを排出させるようにしたこ
とを特徴とする低温液搬送管の微圧冷却保持方法。When a low-temperature liquid is retained or left in a low-temperature liquid transfer pipe to keep it cool, a part of the low-temperature liquid transfer pipe is started up to form a horizontal pipe portion, and the horizontal pipe section captures vapor gas. in the fine pressure cooling holding method of low-temperature liquid-conveying tube which is adapted, by bending the startup pipe section of the cold fluid transport pipe stepwise, and the horizontal pipe part provided with a closing valve in the horizontal pipe portion of the respective stages Separately, a plurality of independent horizontal pipes are formed, and when the low-temperature liquid transport pipe is not used, the on-off valve is closed to supply the low-temperature liquid to the independent horizontal pipes from another system to each horizontal pipe. A low-pressure liquid conveying pipe having a low-pressure cooling and holding method, wherein a vapor gas is discharged from a section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3202896A JP2909269B2 (en) | 1991-08-13 | 1991-08-13 | How to maintain low pressure cooling of low temperature liquid transfer tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3202896A JP2909269B2 (en) | 1991-08-13 | 1991-08-13 | How to maintain low pressure cooling of low temperature liquid transfer tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0544900A JPH0544900A (en) | 1993-02-23 |
| JP2909269B2 true JP2909269B2 (en) | 1999-06-23 |
Family
ID=16464997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3202896A Expired - Fee Related JP2909269B2 (en) | 1991-08-13 | 1991-08-13 | How to maintain low pressure cooling of low temperature liquid transfer tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2909269B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948912B (en) * | 2015-05-21 | 2018-08-28 | 上海理工大学 | A kind of liquid self-propelled carrying method |
-
1991
- 1991-08-13 JP JP3202896A patent/JP2909269B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0544900A (en) | 1993-02-23 |
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