JPS5911075B2 - membrane tank - Google Patents

membrane tank

Info

Publication number
JPS5911075B2
JPS5911075B2 JP3076080A JP3076080A JPS5911075B2 JP S5911075 B2 JPS5911075 B2 JP S5911075B2 JP 3076080 A JP3076080 A JP 3076080A JP 3076080 A JP3076080 A JP 3076080A JP S5911075 B2 JPS5911075 B2 JP S5911075B2
Authority
JP
Japan
Prior art keywords
tank
membrane
pressure
insulation layer
cold insulation
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
Application number
JP3076080A
Other languages
Japanese (ja)
Other versions
JPS56127898A (en
Inventor
康隆 中家
淳一 仲林
一郎 河原
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP3076080A priority Critical patent/JPS5911075B2/en
Publication of JPS56127898A publication Critical patent/JPS56127898A/en
Publication of JPS5911075B2 publication Critical patent/JPS5911075B2/en
Expired 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
    • 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
    • F17C2201/0119—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
    • 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
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0142—Applications for fluid transport or storage placed underground

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】 本発明はメンブレンタンクに関するものである。[Detailed description of the invention] The present invention relates to a membrane tank.

メンブレンとは、貯槽内液と保冷とを隔てる金属製薄膜
をいう。A membrane is a thin metal film that separates the liquid in the storage tank from the cold storage.

メンブレンには大別すると２つの型式があり、まず、そ
の１は熱収縮を二軸で吸収するもの、その２は一軸だけ
にコルゲーションがあり、周方向の熱収縮はこれで吸収
し、子午線方向の吸収はメンブレン全体がづり下がるこ
とによって吸収するものである。There are two types of membranes.The first type absorbs heat shrinkage in two axes, and the second type has corrugation on only one axis, which absorbs heat shrinkage in the circumferential direction and absorbs heat shrinkage in the meridian direction. The absorption occurs when the entire membrane hangs down.

本発明は後者のメンブレンに関するものである。The present invention relates to the latter membrane.

このようなメンブレンタンクでは、従来、メンブレンを
含む内槽が保冷層に対して気密性を有していないオーブ
ンメンブレン方式が採用されてきた。Conventionally, such membrane tanks have adopted an oven membrane system in which the inner tank containing the membrane is not airtight with respect to the cold insulation layer.

しかし、この従来の構造では、開放検査時に保冷層側の
液化ガスが十分にパージできないことなどによる点検時
の安全性への不安、液化ガスによる保冷の断熱効果の劣
化などが問題となってきた。However, with this conventional structure, there have been problems such as concerns about safety during inspections due to the inability to sufficiently purge the liquefied gas on the cold insulation layer side during open inspections, and deterioration of the insulation effect of the cold insulation due to liquefied gas. .

そこで、上記の問題を解決するために、メンブレンの上
部にガスシール部メンブレンと称するものを取り付ける
ことによって内槽と保冷層を完全に分離したクローズド
メンブレン方式が考えられる。Therefore, in order to solve the above problem, a closed membrane system can be considered in which the inner tank and the cold insulation layer are completely separated by attaching what is called a gas seal part membrane to the upper part of the membrane.

このようなメンブレンでは、内圧もしくは液圧によって
押しつけられた状態、あるいは内圧と保冷層圧とが打ち
消し合っている状態で安定する。Such a membrane is stable in a state where it is pressed by internal pressure or hydraulic pressure, or in a state where the internal pressure and the cold layer pressure cancel each other out.

すなわち、〔内圧≧保冷層圧〕であることが必要である
。That is, it is necessary that [internal pressure≧cold layer pressure].

メンブレンの動きは、内槽と保冷層との差圧が小さいほ
どメンブレンと保冷層との摩擦力が小さくなり滑りやす
くなる。As for the movement of the membrane, the smaller the differential pressure between the inner tank and the cold insulation layer, the smaller the frictional force between the membrane and the cold insulation layer, making it easier to slip.

一方、保冷層圧が大気圧より下がると空気の混入により
保冷層を不活性状態に保てなくなる恐れがあるため、原
則としては〔保冷層≧大気圧〕であることが必要である
。On the other hand, if the cold insulation layer pressure falls below atmospheric pressure, there is a risk that the cold insulation layer will not be able to be kept in an inert state due to the incorporation of air, so as a general rule, it is necessary that [cold insulation layer ≧ atmospheric pressure].

従来、このようなクローズドメンブレンタンクでは、オ
ープンメンブレンタンクと同じ差圧条件、すなわち内槽
のガス圧と保冷層のガス圧を等しくコントロールする均
圧計装方式が採用されて去りトー？（フー）ト；１ｆｉ
’ｆ；：；＾クー７’ＨＮＨ’７（１＞・冫Ａａシ５、
１−）く苗犬であることおよび万が一メンブレンから液
化ガスが漏洩した場合のリーク検知が不可能といった問
題が生じる。Conventionally, such closed membrane tanks have adopted a pressure equalization instrumentation method that controls the same differential pressure conditions as open membrane tanks, that is, the gas pressure in the inner tank and the gas pressure in the cold insulation layer. (fu)t;1fi
'f;:;^ Ku7'HNH'7 (1>・冫Aaし5,
1-) Problems arise in that it is a dog seedling and in the event that liquefied gas leaks from the membrane, it is impossible to detect the leak.

本発明は上記問題点を解決し得るメンブレンタンクを提
供することを目的とする。An object of the present invention is to provide a membrane tank that can solve the above problems.

即ち、本発明は、剛性構造の外槽と、該外槽に吊持され
ると共に上方が開放された袋状の本体部メンブレン材よ
り構成された内槽と、前記外槽と内槽との間に形成され
た保冷層とを有するメンブレンタンクにおいて、前記保
冷層と内槽とは、上端が外槽からの垂設板に連結される
と共に下端が本体部メンブレン材上端に取付けられた補
強リングを有する当て板部材に連結されたガスシール部
メンブレン材により気密と成し、更に前記保冷層と大気
とをブリージングタンクを介して均圧させると共に、保
冷層とブリージングタンクとを弁を有しない配管系を介
して連通したことを特徴とするブリージングタンクで、
かかる構成によると、保冷層と内槽とを気密するガスシ
ール部メンブレン材を、補強リングを有する当て板部材
を介して本体部メンブレン材に連結したので、特にガス
シール部メンブレン材に高いガス圧による押圧力が作用
しても十分耐えることができると共に、本体部メンブレ
ン材の膨張収縮も容易に吸収でき、また保冷層とブリー
ジングタンクとを弁を有しない配管を介して連通したの
で、その構成を簡単なものにすることができると共に操
作ミスを伴なうことはない。That is, the present invention provides an outer tank having a rigid structure, an inner tank that is suspended by the outer tank and is made of a bag-like main body membrane material that is open at the top, and a combination of the outer tank and the inner tank. In a membrane tank having a cold insulating layer formed between the cold insulating layer and the inner tank, the upper end is connected to a vertical plate from the outer tank, and the lower end is a reinforcing ring attached to the upper end of the main body membrane material. The gas seal part is made airtight by the membrane material connected to the backing plate member having A breathing tank characterized by communicating through a system,
According to this configuration, the gas seal part membrane material that airtightly connects the cold insulation layer and the inner tank is connected to the main body part membrane material via the backing plate member having the reinforcing ring. It can withstand the pressure exerted by can be made simple and does not involve any operational errors.

２０はコンクリート躯体、２１はその内面にシールプレ
ート２２を介して取付けた保冷材、２３はさらに内側に
熱変形可能に配設した本体部メンブレン材である。20 is a concrete frame, 21 is a cold insulating material attached to its inner surface via a seal plate 22, and 23 is a main body membrane material disposed further inside to be thermally deformable.

２４はコンクリート躯体２０から立設した側板で、その
上端には彎曲した連絡板２５を介して屋根板２６が取付
けられる。Reference numeral 24 denotes a side plate erected from the concrete frame 20, and a roof plate 26 is attached to the upper end of the side plate via a curved connecting plate 25.

なお、各板２４，２５．２６によって外槽が構成される
。Note that each plate 24, 25, 26 constitutes an outer tank.

２７は各板２４，２５，２６の内面間に亘って設けられ
た補強リブ板で、その内面側には保冷材２８が取付けら
れる。Reference numeral 27 denotes a reinforcing rib plate provided between the inner surfaces of each of the plates 24, 25, and 26, and a cold insulating material 28 is attached to the inner surface thereof.

２９は本体部メンブレン材２３の上端内面に取付けた補
強用のダブリング（幽て板部材）で、適切な板厚ならび
に長さに設定してあり、さらに上部内面には補強リング
３０が取付けられている。Reference numeral 29 denotes a reinforcing doubling (reinforcing plate member) attached to the inner surface of the upper end of the main body membrane material 23, which is set to an appropriate plate thickness and length, and furthermore, a reinforcing ring 30 is attached to the upper inner surface. There is.

３１はダブリング２９の上縁に取付けた吊上げ受け板で
、屋根側に設けたメンブレン吊り装置（図示せず）から
のロンド３２が連結されている。Reference numeral 31 denotes a lifting receiving plate attached to the upper edge of the doubling 29, to which a rond 32 from a membrane hanging device (not shown) provided on the roof side is connected.

３３はロツド３２を案内するガイド管である。33 is a guide tube that guides the rod 32.

３４は連絡板２５からの垂設板で、その下端と前記吊上
げ受け板３１との間にガスシール部メンブレン材３５が
設けられる。Reference numeral 34 denotes a plate hanging from the connecting plate 25, and a gas seal portion membrane material 35 is provided between its lower end and the lifting receiving plate 31.

上記した本体部メンブレン材２３、ダブリング２９、吊
上げ受け板３１、ガスシール部メンブレン材３５、垂設
板３４などにより、タンク室の低温液体よりも上方の空
間は、ガス層（内槽）３６と保冷層３γとに区画される
。The space above the low-temperature liquid in the tank chamber is made up of the gas layer (inner tank) 36 and the above-mentioned main body membrane material 23, doubling 29, lifting plate 31, gas seal membrane material 35, vertical plate 34, etc. It is divided into a cold insulation layer 3γ.

３８はダイヤフラム３９を有するブリージングタンクで
、（−５０ｍｍＡｑ〜１ ０ ０ ｍｍＡｑ． ：）の
圧力室４０と前記保冷層３７とが、途中に升を有さない
配管４１を介して連通している。38 is a breathing tank having a diaphragm 39, and a pressure chamber 40 (-50 mmAq to 100 mmAq.:) and the cold insulation layer 37 communicate with each other via a pipe 41 that does not have a square in the middle.

さらに圧力室４０には、Ｎ２ガスボンベ４２からの補充
配管４３が連通されている。Further, a replenishment pipe 43 from an N2 gas cylinder 42 is communicated with the pressure chamber 40 .

なおブリージングタンク３８の大気室４４側には、ダイ
ヤフラム３９を所定圧に押下げるだめの重り（図示せず
）が設けられている。A weight (not shown) is provided on the atmospheric chamber 44 side of the breathing tank 38 to press down the diaphragm 39 to a predetermined pressure.

４５は圧力計、４６は液面計、４γは過圧安全弁、６０
は真空安全弁を示す。45 is a pressure gauge, 46 is a liquid level gauge, 4γ is an overpressure safety valve, 60
indicates a vacuum safety valve.

前記配管４１からの分岐管４８はベントおよびフレアー
４９に連通し、またこの分岐管４８中には放圧弁５０が
設けられている。A branch pipe 48 from the piping 41 communicates with a vent and flare 49, and a pressure relief valve 50 is provided in the branch pipe 48.

前記ガス層３６と保冷層３７とは非常用均圧弁５１を介
して連通可能に構成してある。The gas layer 36 and the cold insulation layer 37 are configured to communicate with each other via an emergency pressure equalizing valve 51.

前記ガス層３６への連通配管５２は、ＢＯＧ処理設備５
３、フレアー５４、ホットガスソース５５に連通してい
る。The communication pipe 52 to the gas layer 36 is connected to the BOG processing equipment 5.
3. It communicates with the flare 54 and the hot gas source 55.

５６は圧力計、５７は深度計、５８ ．５９は過圧真空
安全弁を夫々示す。56 is a pressure gauge, 57 is a depth gauge, 58. 59 indicates overpressure vacuum safety valves, respectively.

通常内圧は、すなわちガス層３６の内圧ａは（ ３ ５
０ ｍｍ．Ａｑ〜ｌ ３ ０ ０ ｍｍＡｑ ：］の
範囲になるように運転される。The normal internal pressure, that is, the internal pressure a of the gas layer 36 is (3 5
0 mm. It is operated in a range of Aq to l300 mmAq:].

そして内圧ａが（ １ ３ ０ ０ ｍｍＡｑ．）を越
えると、フレアー５４などにより伺らかの過圧防止措置
がとられ、（ １ ５ ０ ０ｍｍＡｑ）になると過圧
安全弁５８．４７が作動し、逆に〔３５０ｍｍＡｑ ）
以下になるとホットソース５５よりホットガスを供給す
るなどの負圧防止措置がとられる。When the internal pressure a exceeds (1300 mmAq.), an overpressure prevention measure is taken by the flare 54, etc., and when it reaches (1500 mmAq), the overpressure safety valve 58.47 is activated. On the contrary [350mmAq]
When the pressure falls below, negative pressure prevention measures such as supplying hot gas from the hot source 55 are taken.

この間、保冷層３７の圧力ｂは、ブリージングタンク３
８内のダイヤフラム３９の上下により〔０〜５ ０ ｍ
ｍＡｑ ）に維持される。During this time, the pressure b of the cold insulation layer 37 is
Depending on the top and bottom of the diaphragm 39 in the
mAq).

万一、負圧防止措置にもかかわらず内圧ａが〔約５ ０
ｍｍＡｑ ）以下になる場合には、放圧弁５０を開動
して保冷層３７の圧力ｂを（ Ｏ ｍｍＡ ｑ． ）ま
で下げ、さらに内圧ａが下がり続ける場合には、非常用
均圧弁５１を開動してガス層３６と保冷層３７とを導通
させる。In the unlikely event that the internal pressure a is [approx.
mmAq.), the pressure relief valve 50 is opened to lower the pressure b of the cold insulation layer 37 to (0 mmAq.), and if the internal pressure a continues to fall, the emergency pressure equalization valve 51 is opened. The gas layer 36 and the cold insulation layer 37 are made conductive.

非常用均圧弁５１を作動させると、ガス層３６にＮ２ガ
スが混入すると同時に保冷層３７にＬＰＧが混入し、何
らかの復旧措置が必要となる。When the emergency pressure equalization valve 51 is activated, N2 gas mixes into the gas layer 36 and at the same time LPG mixes into the cold insulation layer 37, necessitating some recovery measures.

なお内圧ａ、圧力ｂとも（−５０ｍｍＡｑ）以下になっ
た場合には真空安全弁６０．５９が作動する。Note that when both the internal pressure a and the pressure b become below (-50 mmAq), the vacuum safety valve 60.59 is activated.

以上の構成によると、保冷層と内槽とを気密するガスシ
ール部メンブレン材を、補強リングを有する当て板部材
を介して本体部メンブレン材に連結したので、特にガス
シール部メンブレン材に高いガス圧による押圧力が作用
しても十分耐えることができると共に、本体部メンブレ
ン材の膨張収縮も容易に吸収でき、また保冷層とブリー
ジングタンクとを弁を有しない配管を介して連通したの
で、その構成を簡単なものにすることができると共に操
作ミスを伴なうことはない。According to the above configuration, the gas seal part membrane material that airtightly connects the cold insulation layer and the inner tank is connected to the main body part membrane material via the backing plate member having the reinforcing ring, so that the gas seal part membrane material has a particularly high gas resistance. It can withstand pressure exerted by pressure, and can easily absorb the expansion and contraction of the membrane material of the main body.Also, since the cold insulation layer and the breathing tank are connected through piping without valves, The configuration can be simplified and there is no possibility of operational errors.

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

第１図、第２図は本発明の一実施例を示し、第１図は要
部の縦断面図、第２図はシステム図である。 ２１・・・・・・保冷材、２３・・・・・・本体部メン
ブレン材、２８・・・・・・保冷材、２９・・・・・・
ダブリング、３０・・・・・・補強リング、３１・・・
・・・吊上げ受け板、３５・・・・・・ガスシール部メ
ンブレン材、３６・・曲ガス層、３７・・・・・・保冷
層、３８・・・・・・ブリージングタンク、３９・・・
・・・ダイヤフラム、４０・・・・・・圧力室、４１・
・・・・・配管、４４・・・・・・大気室、４８・・・
・・・分岐管、５０・・・・・・放圧弁、５１・・・・
・・非常用均圧弁。FIGS. 1 and 2 show an embodiment of the present invention, with FIG. 1 being a vertical sectional view of the main part, and FIG. 2 being a system diagram. 21... Cold insulating material, 23... Main body membrane material, 28... Cold insulating material, 29...
Doubling, 30...Reinforcement ring, 31...
... Lifting receiving plate, 35 ... Gas seal part membrane material, 36 ... Curved gas layer, 37 ... Cold insulation layer, 38 ... Breathing tank, 39 ...・
...Diaphragm, 40...Pressure chamber, 41.
...Piping, 44...Atmospheric chamber, 48...
... Branch pipe, 50 ... Pressure relief valve, 51 ...
・・Emergency pressure equalization valve.

Claims (1)

【特許請求の範囲】[Claims] １ 剛性構造の外槽と、核外槽に吊持されると共に上方
が開放された袋状の本体部メンブレン材より構成された
内槽と、前記外槽と内槽との間に形成された保冷層とを
有するメンブレンタンクにおいて、前記保冷層と内槽と
は、上端が外槽からの垂設板に連結されると共に下端が
本体部メンブレン材上端に取付けられた補強リングを有
する当て板部材に連結されたガスシール部メンブレン材
により気密と成し、更に前記保冷層と大気とをブリージ
ングタンクを介して均圧させると共に、保冷層とブリー
ジングタンクとを弁を有しない配管系を介して連通した
ことを特徴とするメンブレンタンク。1. An outer tank having a rigid structure, an inner tank made of a bag-shaped main body membrane material suspended by the outer nuclear tank and open at the top, and formed between the outer tank and the inner tank. In a membrane tank having a cold insulating layer, the cold insulating layer and the inner tank include a patch plate member whose upper end is connected to a hanging plate from the outer tank and whose lower end has a reinforcing ring attached to the upper end of the main body membrane material. It is made airtight by a gas seal membrane material connected to the gas seal, furthermore, the pressure of the cold insulation layer and the atmosphere is equalized through a breathing tank, and the cold insulation layer and the breathing tank are communicated through a piping system without a valve. A membrane tank characterized by:
JP3076080A 1980-03-10 1980-03-10 membrane tank Expired JPS5911075B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3076080A JPS5911075B2 (en) 1980-03-10 1980-03-10 membrane tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3076080A JPS5911075B2 (en) 1980-03-10 1980-03-10 membrane tank

Publications (2)

Publication Number Publication Date
JPS56127898A JPS56127898A (en) 1981-10-06
JPS5911075B2 true JPS5911075B2 (en) 1984-03-13

Family

ID=12312634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3076080A Expired JPS5911075B2 (en) 1980-03-10 1980-03-10 membrane tank

Country Status (1)

Country Link
JP (1) JPS5911075B2 (en)

Also Published As

Publication number Publication date
JPS56127898A (en) 1981-10-06

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