JPH1182889A - Vertical type heat insulating low temperature tank - Google Patents
Vertical type heat insulating low temperature tankInfo
- Publication number
- JPH1182889A JPH1182889A JP24551997A JP24551997A JPH1182889A JP H1182889 A JPH1182889 A JP H1182889A JP 24551997 A JP24551997 A JP 24551997A JP 24551997 A JP24551997 A JP 24551997A JP H1182889 A JPH1182889 A JP H1182889A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- bog
- tank
- outer tanks
- line
- 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
Links
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液体窒素等の低温
液体を貯留する竪型断熱低温タンクに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertically insulated low-temperature tank for storing a low-temperature liquid such as liquid nitrogen.
【０００２】[0002]
【従来の技術】従来、図２に示すようにＬＮ，ＬＯＸ，
ＬＡｒ，ＬＮＧ等の低温液体Ｌを収容する断熱低温タン
クとして、基盤１上に支持スカート２を介してボンベ状
の内槽３を設け、その内槽３を囲繞するように外槽４を
設け、その内外槽３，４間にパーライト粒等の保冷材を
充填して保冷層５を形成し、その内槽３の下部と外槽４
の底部の間の保冷層５内に、内外槽３，４を仕切ってア
ルミシート等の冷気遮蔽シート７を設けたものが知られ
ている。2. Description of the Related Art Conventionally, as shown in FIG.
As an adiabatic low-temperature tank for storing a low-temperature liquid L such as LAr and LNG, a cylinder-shaped inner tank 3 is provided on a base 1 via a support skirt 2, and an outer tank 4 is provided so as to surround the inner tank 3. A cooling layer such as pearlite particles is filled between the inner and outer tanks 3 and 4 to form a cooling layer 5, and a lower portion of the inner tank 3 and the outer tank 4 are formed.
Is known in which a cold shielding sheet 7 such as an aluminum sheet is provided in a cold insulating layer 5 between bottoms of the inner and outer tanks 3 and 4.
【０００３】この断熱低温タンクにおいては、内外槽
３，４間の保冷層５にＮ2 を封入し、低温タンクの露付
き防止することが必要である。In this adiabatic low-temperature tank, it is necessary to prevent the low-temperature tank from dewing by enclosing N 2 in the cooling layer 5 between the inner and outer tanks 3 and 4.
【０００４】Ｎ2 を封入する場合、外槽４は、外気温に
さらされているため、内外槽３，４間の圧力が季節によ
っても、昼夜によっても変化するため、その対策が必要
となる。When N 2 is sealed, the outer tank 4 is exposed to the outside air temperature, so that the pressure between the inner and outer tanks 3 and 4 changes depending on the season and day and night. .
【０００５】通常の大型の平底タンクの場合には、平底
タンクの近傍にブリージングタンクを設置し、内外槽間
とブリージングタンクとを結んで呼吸させることがなさ
れているが、図２に示した竪型の断熱低温タンクの場合
には、コスト及び敷地等の問題から、外槽４にＮ2 放出
バルブ６を接続し、内外槽３，４間の圧力が高くなる
と、Ｎ2 放出バルブ６を自動的に開いて外気に放出し、
圧力が低くなるとＮ2 を吸引するようにしている。In the case of an ordinary large flat bottom tank, a breathing tank is installed near the flat bottom tank, and the breathing tank is connected between the inner and outer tanks and breathed. In the case of the insulated low-temperature tank of the type, the N 2 release valve 6 is connected to the outer tank 4 and the N 2 release valve 6 is automatically activated when the pressure between the inner and outer tanks 3 and 4 increases due to cost and site problems. Open and release to the outside air,
When the pressure decreases, N 2 is sucked.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、１日の
Ｎ2 使用量は、１５００ｍ3 クラスのタンクにおいて
は、３０ｍ3 ／Ｄａｙ程度となり、年間を通すと、その
使用量は大変な量となる。However, the daily amount of N 2 used in a tank of the 1500 m 3 class is about 30 m 3 / day, and the amount of N 2 used becomes extremely large throughout the year.
【０００７】そこで、本発明の目的は、上記課題を解決
し、内外槽の圧力変動を調整するにおいて、使用Ｎ2 を
ほぼゼロにできる竪型断熱低温タンクを提供することに
ある。Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a vertical adiabatic low-temperature tank which can make use of N 2 almost zero in adjusting the pressure fluctuation of the inner and outer tanks.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、請求項１の発明は、内槽にＬＮ等の低温液体を収容
し、その内槽を保冷層を介して外槽で囲繞した竪型断熱
低温タンクにおいて、内外槽間の圧力を、大気より５０
〜１０００ｍｍＡｑ高い圧力に保つと共に、その圧力を
保つべく内槽からのＢＯＧを内外槽間に充填するように
した竪型断熱低温タンクである。In order to achieve the above object, according to the first aspect of the present invention, a low-temperature liquid such as LN is contained in an inner tank, and the inner tank is surrounded by an outer tank via a cooling layer. In a vertical insulated low-temperature tank, the pressure between the inner and outer tanks is
This is a vertical adiabatic low-temperature tank that maintains a high pressure of ~ 1000 mmAq and fills BOG from the inner tank between the inner and outer tanks to maintain the pressure.
【０００９】請求項２の発明は、内槽のＢＯＧライン
に、内外槽間にＢＯＧを充填するＢＯＧ充填ラインを接
続し、そのＢＯＧ充填ラインに、内外槽内の圧力変動を
所定の範囲に保つ圧力補償弁を接続した請求項１記載の
竪型断熱低温タンクである。According to a second aspect of the present invention, a BOG filling line for filling BOG between the inner and outer tanks is connected to the BOG line of the inner tank, and the BOG filling line keeps the pressure fluctuation in the inner and outer tanks within a predetermined range. The vertical insulated low-temperature tank according to claim 1, further comprising a pressure compensation valve.
【００１０】請求項３の発明は、圧力補償弁は、約５０
０ｍｍＡｑの圧力変動範囲に対して作動せず、その範囲
を越えるとき、ＢＯＧラインからのＢＯＧを内外槽間に
導入或いは内外槽間のＢＯＧをＢＯＧラインに戻すか大
気放出し、かつ内外槽は、その圧力変動に耐え得る構造
にされる請求項２記載の竪型断熱低温タンクである。According to a third aspect of the present invention, the pressure compensating valve has an
When it does not operate for the pressure fluctuation range of 0 mmAq and exceeds the range, the BOG from the BOG line is introduced between the inner and outer tanks or the BOG between the inner and outer tanks is returned to the BOG line or released to the atmosphere, and the inner and outer tanks are 3. The vertical insulated low-temperature tank according to claim 2, wherein the vertical heat-insulating low-temperature tank has a structure capable of withstanding the pressure fluctuation.
【００１１】請求項４の発明は、圧力補償手段は、内外
槽間の圧力を検出する圧力計と、ＢＯＧ充填ラインに接
続される圧力制御弁と、圧力計の圧力値が常時入力され
ると共に、最大圧力値と最低圧力値とが入力され、圧力
計の圧力値が最大・最少の圧力値を越えるとき上記圧力
制御弁を制御する圧力補償器とからなる請求項３記載の
竪型断熱低温タンクである。According to a fourth aspect of the present invention, the pressure compensating means includes a pressure gauge for detecting a pressure between the inner and outer tanks, a pressure control valve connected to the BOG filling line, and a pressure value of the pressure gauge which is constantly inputted. And a pressure compensator for controlling the pressure control valve when a maximum pressure value and a minimum pressure value are input and the pressure value of the pressure gauge exceeds the maximum and minimum pressure values. It is a tank.
【００１２】[0012]
【発明の実施の形態】以下、本発明の好適一実施の形態
を添付図面に基づいて詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.
【００１３】図１において、基盤１０には、筒状の支持
スカート１１を介して低温液体Ｌを収容するボンベ状の
内槽１２が立設され、その内槽１２を囲繞するように外
槽１３が設けられ、その内外槽１２，１３間にパーライ
ト粒等の保冷材を充填して保冷層１４が形成される。In FIG. 1, a cylinder-shaped inner tank 12 for storing a low-temperature liquid L is erected on a base 10 via a cylindrical support skirt 11, and an outer tank 13 is provided so as to surround the inner tank 12. A cooling layer such as pearlite particles is filled between the inner and outer tanks 12 and 13 to form a cooling layer 14.
【００１４】内槽１２の下部と外槽１３の底部の間の保
冷層１４内には、内外槽１２，１３を仕切るアルミクロ
ス等の冷気遮蔽シート１５が設けられ、外槽１３の底部
に硬質ウレタンシート等の断熱層１７が設けられる。In a cold insulating layer 14 between the lower part of the inner tub 12 and the bottom of the outer tub 13, a cold air shielding sheet 15 such as an aluminum cloth separating the inner and outer tubs 12 and 13 is provided. A heat insulating layer 17 such as a urethane sheet is provided.
【００１５】支持スカート１１には、マンホール１８が
予め形成され、硬質ウレタンシートやアルミクロス等が
搬入されて断熱層１７と冷気遮蔽シート１５が形成され
る。A manhole 18 is previously formed in the support skirt 11, and a hard urethane sheet, an aluminum cloth, or the like is carried in to form a heat insulating layer 17 and a cool air shielding sheet 15.
【００１６】また、内槽１２の下部と接合する支持スカ
ート１１の上端内周部には、パーライト粒が充填されに
くいため、グラスウール等の断熱材１９を貼設してお
く。Further, a heat insulating material 19 such as glass wool is attached to the inner peripheral portion of the upper end of the support skirt 11 joined to the lower portion of the inner tank 12 because it is difficult to fill the pearlite particles.
【００１７】この内外槽１２，１３は、従来の竪型断熱
低温タンクより、肉厚で約３０％厚く、或いは断面係数
を高くして約５００ｍｍＡｑの圧力変動に耐え得る耐圧
構造としておく。The inner and outer tanks 12 and 13 have a pressure-resistant structure capable of withstanding a pressure fluctuation of about 500 mmAq by being about 30% thicker or having a higher section modulus than the conventional vertical insulated low-temperature tank.
【００１８】内槽１２の頂部には、低温液体ＬのＢＯＧ
ライン２０が接続され、そのＢＯＧライン２０より分岐
して内外槽１２，１３間の保冷層１４内に、ＢＯＧを充
填するためのＢＯＧ充填ライン２１が接続される。At the top of the inner tank 12, BOG of the low-temperature liquid L
A line 20 is connected, and a BOG filling line 21 for filling BOG is connected to the cold insulation layer 14 between the inner and outer tanks 12 and 13 diverging from the BOG line 20.
【００１９】ＢＯＧ充填ライン２１には、圧力補償手段
２２が設けられる。圧力補償手段２２は、ＢＯＧ充填ラ
イン２１に接続された圧力制御弁２３と、内外槽１２，
１３間の圧力を検出する圧力計２４と、圧力計２４の圧
力値が常時入力されると共に、最大圧力値Ｐmax と最低
圧力値Ｐmin とが入力され（例えば、最大圧力値Ｐmax
は大気より１０００ｍｍＡｑ高い圧力に、最低圧力値Ｐ
min は大気より５０ｍｍＡｑ高い圧力の範囲で設定さ
れ）、圧力計２４の圧力値が最大・最少の圧力値Ｐmax
，Ｐmin を越えるとき、圧力制御弁２３を制御して内
外槽１２，１３間の圧力が設定範囲内（約５００ｍｍＡ
ｑの範囲）を維持するように制御する圧力補償器２５と
からなる。The BOG filling line 21 is provided with a pressure compensating means 22. The pressure compensating means 22 includes a pressure control valve 23 connected to the BOG filling line 21, the inner and outer tanks 12,
The pressure gauge 24 for detecting the pressure between the pressure gauges 13 and the pressure value of the pressure gauge 24 are always inputted, and the maximum pressure value Pmax and the minimum pressure value Pmin are inputted (for example, the maximum pressure value Pmax).
Is a pressure 1000 mmAq higher than the atmosphere, and a minimum pressure value P
min is set in the range of pressure 50 mmAq higher than the atmosphere), and the pressure value of the pressure gauge 24 is the maximum / minimum pressure value Pmax
, Pmin, the pressure control valve 23 is controlled so that the pressure between the inner and outer tanks 12 and 13 falls within a set range (about 500 mmA).
(range of q) is maintained.
【００２０】次に本発明の作用を述べる。Next, the operation of the present invention will be described.
【００２１】先ず、内外槽１２，１３間の保冷層１４内
には、ＢＯＧライン２０よりＢＯＧ充填ライン２１を介
してＢＯＧが充填される。この際、夜間と昼間では温度
差があり、しかも日中は、外槽１３が直射日光に照らさ
れて吸熱するため、内外槽１２，１３間のＢＯＧ圧は、
昼夜で大幅に変化する。そこで、例えば日中での内外槽
１２，１３間の最高圧力値Ｐmax を設定しておき、それ
より５００ｍｍＡｑ低い圧力値をＰmin を設定し、この
最高・最低圧力値Ｐmax ，Ｐmin を圧力補償器２５に予
め入力し、夜間に内外槽１２，１３間のＢＯＧ圧が、最
低圧力値Ｐminを下回るときには、圧力制御弁２３を制
御してＢＯＧ充填ライン２１からＢＯＧを内外槽１２，
１３間に導入して、最低圧力値Ｐmin を越えるようにな
し、また夏期等の日中に最高圧力値Ｐmax を越えるとき
は、内外槽１２，１３間のＢＯＧを大気に放出したり、
或いは内外槽１２，１３間の圧力がＢＯＧライン２０よ
り高ければ圧力制御弁２３を介してＢＯＧライン２０に
戻すか、もしくは他のラインに流すようにして内外槽１
２，１３間の圧力を最高圧力値Ｐmax 以下に下げるよう
にする。First, BOG is filled from the BOG line 20 into the cold insulation layer 14 between the inner and outer tanks 12 and 13 through the BOG filling line 21. At this time, there is a temperature difference between nighttime and daytime, and in the daytime, since the outer tub 13 absorbs heat in direct sunlight, the BOG pressure between the inner and outer tubs 12 and 13 is:
It changes drastically between day and night. Therefore, for example, a maximum pressure value Pmax between the inner and outer tanks 12 and 13 in the daytime is set, and a pressure value 500 mmAq lower than that is set as Pmin, and the maximum and minimum pressure values Pmax and Pmin are determined by the pressure compensator 25. When the BOG pressure between the inner and outer tanks 12 and 13 falls below the minimum pressure value Pmin at night, the pressure control valve 23 is controlled to transfer the BOG from the BOG filling line 21 to the inner and outer tanks 12 and 13.
13 to prevent the pressure from exceeding the minimum pressure value Pmin, and when the pressure exceeds the maximum pressure value Pmax during the daytime in summer or the like, the BOG between the inner and outer tanks 12 and 13 is discharged to the atmosphere.
Alternatively, if the pressure between the inner and outer tanks 12 and 13 is higher than the BOG line 20, the inner or outer tank 1 may be returned to the BOG line 20 via the pressure control valve 23 or may be caused to flow to another line.
The pressure between 2 and 13 is reduced below the maximum pressure value Pmax.
【００２２】このように最高・最低圧力値Ｐmax ，Ｐmi
n の圧力変動幅を５００ｍｍＡｑに設定し、圧力補償器
２５で、内外槽１２，１３間のＢＯＧ圧が、その変動幅
に入るように制御することで、実質的にＮ2 などの封入
ガスの使用量を実質的にゼロにすることができる。As described above, the maximum and minimum pressure values Pmax, Pmi
The pressure fluctuation range of n is set to 500MmAq, a pressure compensator 25, BOG pressure between the inner and outer tanks 12 and 13, by controlling to enter the variation width of the filler gas such as substantially N 2 The usage can be substantially zero.
【００２３】[0023]
【発明の効果】以上要するに本発明によれば、内外槽間
にＢＯＧを封入し、その封入ガスの圧力変動幅を設定
し、その圧力変動幅を越えるとき、ＢＯＧを内外槽に導
入或いは放出することで、Ｎ2 などの封入ガスの使用量
を実質的にゼロにすることができる。In summary, according to the present invention, BOG is sealed between the inner and outer tanks, the pressure fluctuation width of the sealed gas is set, and when the pressure fluctuation width is exceeded, BOG is introduced or discharged into the inner and outer tanks. This makes it possible to substantially reduce the amount of the used gas such as N 2 to zero.
【図１】本発明の一実施の形態を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】従来例を示す図である。FIG. 2 is a diagram showing a conventional example.
１２ 内槽 １３ 外槽 １４ 保冷層 ２０ ＢＯＧライン ２１ ＢＯＧ充填ライン ２２ 圧力補償手段 ２３ 圧力制御弁 ２４ 圧力計 ２５ 圧力補償器 DESCRIPTION OF SYMBOLS 12 Inner tank 13 Outer tank 14 Cooling layer 20 BOG line 21 BOG filling line 22 Pressure compensating means 23 Pressure control valve 24 Pressure gauge 25 Pressure compensator
Claims (4)
内槽を保冷層を介して外槽で囲繞した竪型断熱低温タン
クにおいて、内外槽間の圧力を、大気より５０〜１００
０ｍｍＡｑ高い圧力に保つと共に、その圧力を保つべく
内槽からのＢＯＧを内外槽間に充填することを特徴とす
る竪型断熱低温タンク。1. A vertical adiabatic low-temperature tank in which a low-temperature liquid such as LN is accommodated in an inner tank and the inner tank is surrounded by an outer tank via a cooling layer, and the pressure between the inner and outer tanks is set to 50 to 100 from the atmosphere.
A vertically insulated low-temperature tank characterized by maintaining a high pressure of 0 mmAq and filling BOG from an inner tank between the inner and outer tanks to maintain the pressure.
Ｇを充填するＢＯＧ充填ラインを接続し、そのＢＯＧ充
填ラインに、内外槽内の圧力変動を所定の範囲に保つ圧
力補償手段が設けられる請求項１記載の竪型断熱低温タ
ンク。2. A BOG line between the inner tank and a BOG line between the inner and outer tanks.
2. The vertical adiabatic low-temperature tank according to claim 1, wherein a BOG filling line for filling G is connected, and the BOG filling line is provided with pressure compensating means for keeping the pressure fluctuation in the inner and outer tanks within a predetermined range.
する圧力計と、ＢＯＧ充填ラインに接続される圧力制御
弁と、圧力計の圧力値が入力され、約５００ｍｍＡｑの
圧力変動範囲に対して作動せず、その範囲を越えると
き、ＢＯＧラインからのＢＯＧを内外槽間に導入或いは
内外槽間のＢＯＧをＢＯＧラインに戻すか大気放出し、
かつ内外槽は、その圧力変動に耐え得る構造にされる請
求項２記載の竪型断熱低温タンク。3. The pressure compensating means receives a pressure gauge for detecting a pressure between the inner and outer tanks, a pressure control valve connected to a BOG filling line, and a pressure value of the pressure gauge, and falls within a pressure fluctuation range of about 500 mmAq. When it does not operate, and exceeds the range, the BOG from the BOG line is introduced between the inner and outer tanks, or the BOG between the inner and outer tanks is returned to the BOG line or released to the atmosphere,
3. The vertical insulated low-temperature tank according to claim 2, wherein the inner and outer tanks are structured to withstand the pressure fluctuation.
する圧力計と、ＢＯＧ充填ラインに接続される圧力制御
弁と、圧力計の圧力値が常時入力されると共に、最大圧
力値と最低圧力値とが入力され、圧力計の圧力値が最大
・最少の圧力値を越えるとき上記圧力制御弁を制御する
圧力補償器とからなる請求項３記載の竪型断熱低温タン
ク。4. The pressure compensating means includes a pressure gauge for detecting a pressure between the inner and outer tanks, a pressure control valve connected to a BOG filling line, a pressure value of the pressure gauge constantly input, and a maximum pressure value. 4. A vertical insulated low-temperature tank according to claim 3, further comprising a pressure compensator for inputting a minimum pressure value and controlling the pressure control valve when the pressure value of the pressure gauge exceeds the maximum and minimum pressure values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24551997A JPH1182889A (en) | 1997-09-10 | 1997-09-10 | Vertical type heat insulating low temperature tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24551997A JPH1182889A (en) | 1997-09-10 | 1997-09-10 | Vertical type heat insulating low temperature tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1182889A true JPH1182889A (en) | 1999-03-26 |
Family
ID=17134899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24551997A Pending JPH1182889A (en) | 1997-09-10 | 1997-09-10 | Vertical type heat insulating low temperature tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1182889A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2020202577A1 (en) * | 2019-04-05 | 2020-10-08 | ||
| WO2020202578A1 (en) * | 2019-04-05 | 2020-10-08 | 川崎重工業株式会社 | Double-shell tank and liquefied gas carrier |
| WO2023182362A1 (en) * | 2022-03-23 | 2023-09-28 | 川崎重工業株式会社 | Method for cooling down liquefied gas storage tank |
| KR20230162683A (en) | 2021-03-31 | 2023-11-28 | 카와사키 주코교 카부시키 카이샤 | Multi-angle tank, vessel and gas pressure adjustment method |
| WO2024069967A1 (en) * | 2022-09-30 | 2024-04-04 | 川崎重工業株式会社 | Liquid hydrogen tank and method for operating same |
-
1997
- 1997-09-10 JP JP24551997A patent/JPH1182889A/en active Pending
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|---|---|---|---|---|
| JPWO2020202577A1 (en) * | 2019-04-05 | 2020-10-08 | ||
| WO2020202578A1 (en) * | 2019-04-05 | 2020-10-08 | 川崎重工業株式会社 | Double-shell tank and liquefied gas carrier |
| JPWO2020202578A1 (en) * | 2019-04-05 | 2020-10-08 | ||
| WO2020202577A1 (en) * | 2019-04-05 | 2020-10-08 | 川崎重工業株式会社 | Liquefied gas storage structure and liquefied gas carrier |
| CN113661355A (en) * | 2019-04-05 | 2021-11-16 | 川崎重工业株式会社 | Double-shell tank and liquefied gas carrying ship |
| CN113825942A (en) * | 2019-04-05 | 2021-12-21 | 川崎重工业株式会社 | Liquefied gas storage structure and liquefied gas carrying ship |
| EP3951243A4 (en) * | 2019-04-05 | 2022-11-16 | Kawasaki Jukogyo Kabushiki Kaisha | Double-shell tank and liquefied gas carrier |
| CN113825942B (en) * | 2019-04-05 | 2024-02-02 | 川崎重工业株式会社 | Liquefied gas storage structure and liquefied gas carrier |
| KR20230162683A (en) | 2021-03-31 | 2023-11-28 | 카와사키 주코교 카부시키 카이샤 | Multi-angle tank, vessel and gas pressure adjustment method |
| WO2023182362A1 (en) * | 2022-03-23 | 2023-09-28 | 川崎重工業株式会社 | Method for cooling down liquefied gas storage tank |
| WO2024069967A1 (en) * | 2022-09-30 | 2024-04-04 | 川崎重工業株式会社 | Liquid hydrogen tank and method for operating same |
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