JPS5919800A - Low-temperature liquid storing tank - Google Patents

Low-temperature liquid storing tank

Info

Publication number
JPS5919800A
JPS5919800A JP12966382A JP12966382A JPS5919800A JP S5919800 A JPS5919800 A JP S5919800A JP 12966382 A JP12966382 A JP 12966382A JP 12966382 A JP12966382 A JP 12966382A JP S5919800 A JPS5919800 A JP S5919800A
Authority
JP
Japan
Prior art keywords
tank
low
liquid
temperature
temperature liquid
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.)
Pending
Application number
JP12966382A
Other languages
Japanese (ja)
Inventor
Tadashi Kushiyama
正 串山
Yasuhiro Takagishi
高岸 泰弘
Makoto Tashimo
田下 誠
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.)
Mitsubishi Heavy Industries Ltd
Tokyo Gas Co Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Tokyo Gas Co Ltd
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 Mitsubishi Heavy Industries Ltd, Tokyo Gas Co Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP12966382A priority Critical patent/JPS5919800A/en
Publication of JPS5919800A publication Critical patent/JPS5919800A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/12Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/126Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for large storage containers for liquefied gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/03Thermal insulations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146Two-phase
    • F17C2223/0153Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

PURPOSE:To prevent the stratification of liquid stored in a tank, by disposing a heat-insulating sleeve opened at its opposite ends in the liquid stored in the tank. CONSTITUTION:Low-temperature liquid in a lower layer B, heated by the heat applied from the bottom face and the side face of a tank 1, is passed through an annular passage formed between the tank 1 and the heat-insulating sleeve 5 and flows upward while raising its temperature. Then, the heated liquid is distributed through a clearance 2 over the surface of low-temperature liquid in an upper layer A and flows toward the central portion or the peripheral portion of the tank 1 while lowering its temperature through evaporation. During the above while, the heated liquid is mixed with the low-temperature liquid in the upper layer A. Thus, since the low-temperature liquid in the upper layer A and that in the lower layer B are mixed with each other gradually from the surface of the upper layer A, roll over is not caused. In the above arrangement, it is necessary to vary the values of the clearances 2, 3 and the depth 4 according to the heating rate at the bottom and side faces of the tank and the type of the liquid to be stored in the tank 1.

Description

【発明の詳細な説明】 極低温液体をタンクに貯蔵する場合、如何にタンク底面
及び側面を断熱しても完全には断熱できず、同底面並に
側面からの人熱工オルギに相当する低温液体が貯蔵液表
面から蒸発するのは避けられない。而して前記タンクに
低温液体な注入する場合、一般にはいくらかの低温液体
が残存した状態で行なわれ、しかも多少とも温度、密度
等物性の異なる低温液が供給されろ。
[Detailed Description of the Invention] When storing cryogenic liquid in a tank, no matter how insulated the bottom and sides of the tank, it cannot be completely insulated, and the low temperature equivalent to artificial heating from the bottom and sides of the tank cannot be completely insulated. It is inevitable that liquid will evaporate from the storage liquid surface. When a low-temperature liquid is injected into the tank, it is generally done with some remaining low-temperature liquid, and low-temperature liquids having different physical properties such as temperature and density are supplied.

このときt?iJ記両液体は容易には混合せず、上下各
層内に夫々対流が生じ、これらの層は比較的安定した状
態が持続される。
At this time t? The two liquids do not mix easily, convection occurs in the upper and lower layers, and these layers maintain a relatively stable state.

しかし可成りの時間が経過すると、下層がタンク底面部
に側面から加温されて上下層の密度差が小さくなり、短
時間のうちに上下層が逆転成いは混合して低温液体の蒸
発計が急激に増大する、所iF]ロールオーツz JJ
7.象が発生することがある。
However, after a considerable amount of time has passed, the lower layer is heated from the side at the bottom of the tank, and the density difference between the upper and lower layers becomes smaller. rapidly increases, place iF] rolled oats z JJ
7. Elephants may occur.

このようなロールオーバ現象を防止するために、低温液
タンクでは貯蔵液より密度の大きい低温液を受入れる場
合には上部から、より密度の小さい低温液を受入れる場
合には下部より供給してタンク内既存の貯蔵液との混合
を促進している。
To prevent this kind of rollover phenomenon, low-temperature liquid tanks are supplied from the top when receiving low-temperature liquid with a higher density than the stored liquid, and from the bottom when receiving low-temperature liquid with a lower density. Facilitates mixing with existing stock solutions.

また第1図に示すように、何等かの原因でタンク(r)
内部が上下2層(Al (B)に分かれた場合には、タ
ンク底面に設けたノズル(C)から下/! (E3+の
低温液を噴出させ、上下層(A)(B)の境界層を乱し
て両層の混合を促進している。
Also, as shown in Figure 1, for some reason the tank (r)
When the interior is divided into upper and lower layers (Al (B), a low temperature liquid of E3+ is spouted from the nozzle (C) installed on the bottom of the tank to form a boundary layer between the upper and lower layers (A) and (B). and promotes mixing of both layers.

しかしながら前者の方法はそのような受入装置を準備し
ておく必要があり、またこれらの方法のみで完全に混合
することはできず、更に後者の方法では成層の状況を検
知して、しかも低温液体を噴出させる装置が必要であり
、またジェット噴流のエネルギ分だけ蒸発凰も増加する
のみならず効率がよくな(−5 本発明は11J記したようなロールオーバ現象な防止す
るために提案されたものである。第1図に示すとおり、
物性の相違なる」ユニ2 J)1 (Al CB+が安
定して形成されている状態を考えたどき、側面がらの伝
熱量な一定以上にすると、下層(B)の物質が境界層を
突破り、タンク側壁に沿って上層(Alの上部に達し、
同上層(A)内で混合して下層(T3)が順次簿くなり
、またロールオーバ現象か発生しないことが実験的に確
認された。
However, the former method requires the preparation of such a receiving device, and these methods alone cannot achieve complete mixing, and the latter method detects the stratification situation and, moreover, does not handle low-temperature liquids. In addition, the evaporation volume is not only increased by the energy of the jet stream, but also efficient (-5) The present invention was proposed to prevent the rollover phenomenon described in 11 As shown in Figure 1,
Uni 2 J) 1 (Considering a state in which Al CB+ is stably formed, if the amount of heat transfer from the side surface exceeds a certain level, the material in the lower layer (B) will break through the boundary layer. , reaches the top of the upper layer (Al) along the tank side wall,
It was experimentally confirmed that the lower layer (T3) was mixed in the same upper layer (A) and the lower layer (T3) was sequentially stacked, and that no rollover phenomenon occurred.

本発明はこのような実験乎実に着目して提案されたもの
で、ロールオーバの発生しない程度に積極的に下層の低
温液を上層の低温液に汲み上げるようにしたもので、タ
ンク内部の貯液中に、上下端が開放された断熱筒を設け
、貯液の層状化を防止するように構成されたことを’l
−ff徴とする低温/lk貯朽Vに[糸るものである。
The present invention was proposed by focusing on such experimental findings, and is designed to actively pump the low-temperature liquid in the lower layer to the low-temperature liquid in the upper layer to the extent that rollover does not occur. Inside, there is a heat insulating tube with open top and bottom ends to prevent layering of the stored liquid.
-ff characteristic of low temperature/lk storage V.

本発明においては目1J記したように、タンク内部の貯
液中に、上下端が開放された断熱筒が配設されているの
で、クック底面並に1111j面からの入熱によって加
温された下層の低温液は、11J記断熱筒とタンク側壁
との間に形成された通路、若しくは前記断熱筒内を通っ
て漸次温度を上げながら上昇する。セして貯液の表面近
傍より上層の低温液の表面に拡り蒸発しながら温度を下
げつつ、中心または周辺部に流れ、この間に上層の低温
液とも混合する。
In the present invention, as described in item 1J, an insulating cylinder with open upper and lower ends is installed in the liquid storage inside the tank, so that it is heated by heat input from the bottom surface of the cooker as well as from the 1111j surface. The low-temperature liquid in the lower layer passes through the passage formed between the heat insulating cylinder and the side wall of the tank described in 11J or inside the heat insulating cylinder, and rises while gradually increasing its temperature. The liquid then spreads from near the surface of the storage liquid to the surface of the upper layer of low-temperature liquid, evaporates and lowers the temperature while flowing to the center or periphery, during which time it also mixes with the upper layer of low-temperature liquid.

かくしてタンク内の上層及び下層の各低温液は緩徐に上
層の表面から混合するので、ロールオーバ現象現象は発
生しlよい。また何等かの原因で貯液が分離成層した場
合でも、自然現象として自動的に混合するので安全であ
る。
In this way, the low-temperature liquids in the upper and lower layers in the tank are slowly mixed from the surface of the upper layer, so that no rollover phenomenon occurs. Furthermore, even if the stored liquid is separated and stratified for some reason, it is safe because it automatically mixes as a natural phenomenon.

このように本発明によれば、タンク内下層の低温液を上
下層間の境界層にあまり影響されろことなく、上層の低
温液表面近傍に上昇させ、同表面から緩徐に上下層の低
温液を混合させることによりロールオーバ現象の発生を
防止し、同時にタンク底面及び側面からの入熱により加
熱された低温液を貯液表面に直接供給することによって
、タンク内の低温液の温度上昇を小さく保持しつるもの
である。
As described above, according to the present invention, the low-temperature liquid in the lower layer in the tank is allowed to rise to the vicinity of the surface of the upper-layer low-temperature liquid without being significantly influenced by the boundary layer between the upper and lower layers, and the low-temperature liquid in the upper and lower layers is slowly drawn from the same surface. By mixing, the rollover phenomenon is prevented, and at the same time, the temperature rise of the low-temperature liquid in the tank is kept small by directly supplying the low-temperature liquid heated by heat input from the bottom and sides of the tank to the liquid storage surface. It is something that lasts.

本発明は低温液化ガス貯槽等、物性の僅かに異ったもの
を同一タンク内に貯蔵し、しかもこれらの物質が混、合
して層を形成しない力が好ましい貯槽全般に適用される
ものである。
The present invention is applicable to all storage tanks, such as low-temperature liquefied gas storage tanks, in which materials with slightly different physical properties are stored in the same tank, and it is preferable that these materials do not mix and form layers. be.

以下本発明を低温液化ガス貯槽に適用した図示の実施例
について説、明する。
The illustrated embodiment in which the present invention is applied to a low-temperature liquefied gas storage tank will be described and explained below.

(1)は円筒状のタンクで、同タンク(1)の側壁から
適当な間隙(2)な存して内側に、タンク底面から適当
な間隙(3)を存し且つ上層(A)の低温液表面から適
当な深さく4)を存してタンク(1)と同心状の断熱筒
(5)が配設されている。
(1) is a cylindrical tank, with an appropriate gap (2) inside from the side wall of the tank (1), an appropriate gap (3) from the bottom of the tank, and a low-temperature upper layer (A). A heat insulating cylinder (5) is disposed concentrically with the tank (1) at an appropriate depth 4) from the liquid surface.

タンク(1)の底面及び(111面か16の入熱によっ
て加温された下層(Blの低温槽は、タンク(1)及び
断熱筒(5)間の円環状の通路な通り、温度を上げなが
ら上昇−し、上層(Alの低温液の表面近傍で同液の表
面に前記間隙(2)より拡がり、蒸発しながら温度な下
げつつ、中心或いは周辺に向って流れる一方、この間に
上層(A)の低温液とも混合する。
The bottom surface of the tank (1) and the lower layer (Bl) heated by the heat input from the bottom surface (111 or 16) pass through the annular passage between the tank (1) and the heat insulating cylinder (5) to raise the temperature. The upper layer (A) spreads from the gap (2) near the surface of the low-temperature liquid, evaporates and flows toward the center or periphery while lowering the temperature. ) is also mixed with the low temperature liquid.

このとき前記間隙(2)(31深さく4)の夫々の長さ
を上下層(Alt(B)の成層条件を破壊しないように
選定する必要がある。小さすぎると上下層(A)(B)
の密度が接近してロールオーバ現象が発生する。なお前
記各間隙及び深さの値は、タンク底面及び側面からの入
熱並に貯蔵物質によって変える必要がある。
At this time, it is necessary to select the length of each of the gaps (2) (31 depth 4) so as not to destroy the stratification conditions of the upper and lower layers (Alt (B). If it is too small, the lengths of the upper and lower layers (A) (B )
The rollover phenomenon occurs as the densities approach each other. Note that the values of each gap and depth need to be changed depending on the heat input from the bottom and side surfaces of the tank and the storage material.

このように図示の低温液槽においては上下)fN (A
)(B)の低温液は緩徐に上層FA、)の表面から混合
するので、ロールオーバ現象は発生しない。また何等か
の原因で低温液が分離成層した場合でも、自然現象とし
て自動的に混合するので安全である。
In this way, in the illustrated low-temperature liquid tank, the upper and lower) fN (A
Since the low temperature liquid of )(B) is slowly mixed from the surface of the upper layer FA, ), no rollover phenomenon occurs. Furthermore, even if the low-temperature liquid is separated and stratified for some reason, it is safe because it automatically mixes as a natural phenomenon.

第6図は本発明の他の実施例を示し、下端縁とタンク(
1)底面との間に距離(6)を存し、上層(Alの低温
液からの深さく7)を以って断熱筒(8)を1個または
複数個タンク(1)内に設置したものであり、タンク(
1)底面で加温された下層(1B)の低温液体な前記断
熱筒(8)を介して上層(Alの低温液表面に導き、上
下両層(A)([3)を混合せしめるとともに蒸発させ
、ロールオーバ現象の発生を防止するものである。
FIG. 6 shows another embodiment of the present invention, in which the lower edge and the tank (
1) One or more heat insulating cylinders (8) were installed in the tank (1) with a distance (6) from the bottom and an upper layer (depth 7 from the low temperature Al liquid). It is a tank (
1) The low-temperature liquid of the lower layer (1B) heated at the bottom is guided to the surface of the upper layer (Al low-temperature liquid) through the heat insulating cylinder (8), and both the upper and lower layers (A) ([3) are mixed and evaporated. This is to prevent the rollover phenomenon from occurring.

以上本発明を実施例について説明したが、本発明は勿論
このような実施例にだけ局限されるものではな・く、不
発明の精神を逸脱しない範囲内で種々の設営iの改変を
施しうるもσ)である。
Although the present invention has been described above with reference to embodiments, the present invention is of course not limited to such embodiments, and may be modified in various ways without departing from the spirit of non-invention. is also σ).

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

第1図は従来の低温液貯槽の一例を示す縦断面図、第2
図及び第6図は夫々本発明に係る低温液槽の各実施例を
示す縦断面図である。 (1)・・・タンク、  (5)(8)・・・断熱筒復
代理人 弁理士 岡 本 重 文 外2名 片17 Cヤ2z
Figure 1 is a vertical cross-sectional view showing an example of a conventional low-temperature liquid storage tank;
6 and 6 are longitudinal cross-sectional views showing respective embodiments of the low-temperature liquid tank according to the present invention. (1)...Tank, (5)(8)...Insulated tube Sub-agent Patent attorney Shige Okamoto 2 people outside the text 17 Cya 2z

Claims (1)

【特許請求の範囲】[Claims] タンク内部の貯液中に、上下端が開放された断熱筒を設
け、貯液の層状化を防止するように構成されたことを特
徴とする低温液貯槽。
1. A low-temperature liquid storage tank characterized in that a heat insulating cylinder with open upper and lower ends is provided in the liquid stored inside the tank to prevent stratification of the stored liquid.
JP12966382A 1982-07-27 1982-07-27 Low-temperature liquid storing tank Pending JPS5919800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12966382A JPS5919800A (en) 1982-07-27 1982-07-27 Low-temperature liquid storing tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12966382A JPS5919800A (en) 1982-07-27 1982-07-27 Low-temperature liquid storing tank

Publications (1)

Publication Number Publication Date
JPS5919800A true JPS5919800A (en) 1984-02-01

Family

ID=15015066

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12966382A Pending JPS5919800A (en) 1982-07-27 1982-07-27 Low-temperature liquid storing tank

Country Status (1)

Country Link
JP (1) JPS5919800A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0265800U (en) * 1988-11-08 1990-05-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0265800U (en) * 1988-11-08 1990-05-17

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