JPH0417302B2 - - Google Patents
Info
- Publication number
- JPH0417302B2 JPH0417302B2 JP57105422A JP10542282A JPH0417302B2 JP H0417302 B2 JPH0417302 B2 JP H0417302B2 JP 57105422 A JP57105422 A JP 57105422A JP 10542282 A JP10542282 A JP 10542282A JP H0417302 B2 JPH0417302 B2 JP H0417302B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- insulating material
- cold
- outer tank
- roof
- 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
- 239000011810 insulating material Substances 0.000 claims description 23
- 238000009413 insulation Methods 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 17
- 229910001873 dinitrogen Inorganic materials 0.000 description 17
- 239000012774 insulation material Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 13
- 238000001035 drying Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000010276 construction Methods 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 7
- 239000010408 film Substances 0.000 description 7
- 239000011888 foil Substances 0.000 description 7
- 239000011261 inert gas Substances 0.000 description 7
- 239000012212 insulator Substances 0.000 description 5
- 238000010926 purge Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F17C13/001—Thermal insulation specially adapted for cryogenic vessels
-
- 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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0304—Thermal insulations by solid means
- F17C2203/0345—Fibres
- F17C2203/035—Glass wool
-
- 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
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】
〈産業上の利用分野〉
開示技術はLNG等の低温液化ガスの貯溜用の
タンクの建造後のスタートアツプ時のタンク内に
先在する大気中からの水蒸気湿分の追い出し技術
の分野に属する。[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology is used to reduce water vapor moisture from the atmosphere that already exists inside a tank at the time of startup after construction of a tank for storing low-temperature liquefied gas such as LNG. It belongs to the field of eviction technology.
〈要旨の概要〉
而して、この発明はコンクリート製の外槽とメ
ンブレン内槽等の間に耐圧縮性の断熱材を介設
し、一方、外槽屋根から吊下して設けたサスペン
デツドデツキ上には多数のユニツト繊維状の保冷
材をアルミ箔等の遮熱膜を上面に添設されて敷設
しているLNG等の低温液化ガスタンクにおいて、
該保冷材のドライング時の窒素ガス等の不活性ガ
スの拡散を容易に行うようにする保冷材の構造に
関する発明であり、特に、サスペンデツドデツキ
上に敷設される繊維状の保冷材の上面にアルミ箔
等の遮熱膜を添設し、該遮熱膜にピンホール状の
小孔が多数穿設されて該繊維状保冷材の内部と外
槽屋根の下部空間とが気体流通状に連通されるよ
うにされている低温液化ガスタンクのサスペンデ
ツドデツキ保冷材構造に係る発明である。<Summary of the gist> This invention provides a structure in which a compression-resistant heat insulating material is interposed between a concrete outer tank and a membrane inner tank. In low-temperature liquefied gas tanks such as LNG, where a large number of unit fibrous cold insulating materials are installed on the deck with a heat shielding film such as aluminum foil attached to the top surface,
This invention relates to the structure of a cold insulating material that facilitates the diffusion of inert gas such as nitrogen gas during drying of the cold insulating material, and particularly to the upper surface of a fibrous cold insulating material laid on a suspended deck. A heat shielding film such as aluminum foil is added to the heat shielding film, and a large number of pinhole-shaped holes are bored in the heat shielding film to allow gas to flow between the inside of the fibrous cold insulating material and the space under the outer tank roof. This invention relates to a suspended deck cold insulator structure for a low-temperature liquefied gas tank that is communicated with each other.
〈従来技術〉
周知の如く、サービスタンクや備蓄タンクとし
て低温液化ガスタンクが広く建造されて運転され
ているが、それらのうちには、例えば、地上タン
ク、地下、半地下タンク等があり、それぞれ運転
条件が相違するため、構造も異なつており、地
下、半地下タンクに於ては断熱条件として外槽屋
根からサスペンデツドデツキを吊設して該サスペ
ンデツドデツキ上にグラスウール等の繊維状の保
冷材のユニツトを多数隣接して敷設し、更にその
上にアルミ箔等の遮熱薄膜を添設して輻射入熱を
遮断するようにしている。<Prior Art> As is well known, low-temperature liquefied gas tanks are widely constructed and operated as service tanks and storage tanks. Because the conditions are different, the structure is also different. For underground and semi-underground tanks, a suspended deck is hung from the outer tank roof and fibrous material such as glass wool is placed on top of the suspended deck to provide insulation. A large number of units of cold insulation material are laid adjacent to each other, and a heat shielding thin film such as aluminum foil is added on top of the units to block radiant heat input.
ところで、該種低温液化ガスタンクの建造は大
型であることもあつて所謂オープンシステムで行
われ、したがつて、建造後に建造中にタンク内の
大気を閉じ込めたままでクールダウンし、スター
トアツプすると、空気中に混在する酸素と貯溜さ
れている可燃ガスとが結合して発火する虞があつ
たり、混在する水蒸気分等の湿分が凍結して払い
出しポンプや各メカニズム部を氷結して不稼動状
態にする虞があるため、スタートアツプ時に前者
に対してO2パージ、後者に対してドライングが
行われるのが通常である。 By the way, the construction of such low-temperature liquefied gas tanks is carried out in a so-called open system due to their large size. Therefore, after construction, the atmosphere inside the tank is cooled down while being confined, and when the tank is started up, the air is released. There is a risk of ignition due to the combination of the oxygen mixed inside and the stored combustible gas, and the mixed moisture such as water vapor freezes and freezes the dispensing pump and other mechanical parts, rendering them inoperable. Because of the risk of this, the former is normally purged with O2 and the latter is dried at startup.
〈発明が解決しようとする課題〉
このため一般に窒素ガス等の不活性ガスによる
置換方法を用いているが、O2パージについては
比較的に少量の設定定量の不活性ガス供給で行わ
れるが、湿分については相当量の不活性ガス量を
要し、したがつて、著るしくコスト高になる不利
点があつた。<Problems to be Solved by the Invention> For this reason, a substitution method using an inert gas such as nitrogen gas is generally used, but O 2 purge is performed by supplying a relatively small amount of inert gas at a set amount. With regard to moisture, a considerable amount of inert gas is required, which has the disadvantage of significantly increasing costs.
而して、この大量の例えば、窒素ガスの不必要
量の原因としてはタンクのオープンシステム下の
建造時のサスペンデツドデツキ上に敷設する繊維
状保冷材にそれがあることが分つてきた。 It has now been discovered that the cause of this large amount of unnecessary nitrogen gas, for example, lies in the fibrous cold insulating material laid on the suspended deck during construction of the open system of the tank.
即ち、通常サスペンデツドデツキ上に対する保
冷材の敷設を、例えば、露点10℃の大気中で行う
と、該保冷材の上面と下面はアルミ箔とサスペン
デツドデツキのデツキプレートでサンドイツチ状
にシールされているため、ユニツト保冷材の隣接
継目の僅かな間を介して該保冷材内部と外槽屋根
の下部空間とが連通されているに過ぎず、したが
つて、10℃露点の大気のタンク建造時の保冷材中
の水蒸気湿分は実質的に１種の閉じ込め状態とな
り、閉じ込め状態の大気とタンク屋根から供給さ
れるドライング窒素ガスとは対流混合され難い状
態となり、上記継目間を介しての水蒸気分圧に基
づく拡散放出の態様をとらざるを得ず、したがつ
て、タンク内の露点が目標値、例えば、マイナス
40℃に達しても、保冷材内では露点に達せず、
又、タンク内での窒素ガスの下降速度が１mm／
secと極めて遅いことも相俟つて拡散には著るし
く時間的に長くかかり、したがつて、使用される
窒素ガス量はタンク内容積の数倍にも達し、数百
萬円のコストロスになる不利点があつた。 That is, when a cold insulating material is laid on a normal suspended deck in an atmosphere with a dew point of 10°C, the top and bottom surfaces of the cold insulating material are sealed like a sandwich with aluminum foil and the deck plate of the suspended deck. Therefore, the interior of the unit cold insulating material and the space under the outer tank roof are communicated only through a small gap between adjacent joints of the unit cold insulating material, and therefore, the tank is exposed to atmospheric air with a dew point of 10°C. Water vapor moisture in the cold insulation material at the time of construction is essentially in a type of trapped state, and the trapped atmosphere and drying nitrogen gas supplied from the tank roof are difficult to mix by convection, and the water vapor is trapped between the seams. Therefore, the dew point in the tank must be set to the target value, for example, negative.
Even if the temperature reaches 40℃, the dew point will not be reached inside the cold insulation material.
Also, the descending speed of nitrogen gas in the tank is 1mm/
Combined with the fact that it is extremely slow (seconds), diffusion takes an extremely long time, and the amount of nitrogen gas used is several times the tank's internal volume, resulting in a cost loss of several hundred thousand yen. There were disadvantages.
〈発明の目的〉
この発明の目的は上述従来技術に基づく低温液
化ガスタンクのサスペンデツドデツキ上の保冷材
によるドライング時の大量使用の窒素ガス等の不
活性ガスの問題点を解決すべき技術課題とし、サ
スペンデツドデツキ上に敷設される繊維状保冷材
の輻射熱に対する遮熱機能を充分保持させつつ、
蒸気分圧による拡散を促進させ得る機能を具備す
るようにしてエネルギー産業における貯蔵技術利
用分野に益する優れた低温液化ガスタンクのサス
ペンデツドデツキ保冷材構造を提供せんとするも
のである。<Purpose of the Invention> The purpose of the present invention is to solve the technical problem of using a large amount of inert gas such as nitrogen gas when drying a low-temperature liquefied gas tank using a cold insulation material on a suspended deck based on the above-mentioned prior art. While maintaining sufficient heat shielding function against radiant heat of the fibrous cold insulation material laid on the suspended deck,
It is an object of the present invention to provide an excellent structure of a suspended deck cold insulator for a low temperature liquefied gas tank, which has a function of promoting diffusion due to vapor partial pressure, thereby benefiting the field of storage technology application in the energy industry.
〈課題を解決するための手段・作用〉
上述目的に沿い先述特許請求の範囲を要旨とす
るこの発明の構成は前述課題を解決するために、
低温液化ガスタンクの建造後のスタートアツプ時
に外槽屋根から乾燥窒素ガス等の不活性ガスを供
給し、該外槽屋根から吊設したサスペンデツドデ
ツキ上に敷設した繊維状保冷材を介してタンク内
に下降させて先在大気と置換させ、O2パージと
ドライングを行うようにさせ、その間、保冷材の
上面に添設された遮熱膜に穿設された多数のピン
ホール状の小孔が該保冷材内と外槽屋根の下部空
間を連通して水蒸気分圧による拡散が促進され、
早期にドライングが終了するようにした技術的手
段を講じたものである。<Means/effects for solving the problems> In order to solve the problems mentioned above, the structure of the present invention, which is based on the scope of the above-mentioned claims, is as follows:
At startup after construction of a low-temperature liquefied gas tank, inert gas such as dry nitrogen gas is supplied from the outer tank roof, and the tank is heated through a fibrous cold insulating material laid on a suspended deck suspended from the outer tank roof. During this period, a large number of pinhole - shaped small holes are drilled into the heat shielding film attached to the top surface of the cold insulator. communicates the inside of the cold insulation material with the space below the outer tank roof, promoting diffusion due to water vapor partial pressure,
Technical measures have been taken to end the drying process quickly.
〈実施例〉
次に、この発明の１実施例を図面に基づいて説
明すれば以下の通りである。<Example> Next, an example of the present invention will be described below based on the drawings.
１は低温液化ガスタンクとしての地下タンクで
あり、地盤２に対してコンクリート製の外槽３が
埋設され、所定の対熱収縮性の断熱材４を介して
内槽のメンブレン５が設けられている。 Reference numeral 1 designates an underground tank as a low-temperature liquefied gas tank, in which an outer tank 3 made of concrete is buried in the ground 2, and a membrane 5 of the inner tank is provided through a predetermined heat-shrinkable heat insulating material 4. .
一方、外槽屋根６からはサスペンデツドデツキ
７が吊設されており、その上面にはこの発明の要
旨を成す繊維状の保冷材８が所定厚さで敷設され
ている。 On the other hand, a suspended deck 7 is suspended from the outer tank roof 6, and a fibrous cold insulating material 8, which constitutes the gist of the present invention, is laid on its upper surface to a predetermined thickness.
９は放出管であり、サスペンデツドデツキ７、
保冷材８、外槽屋根６を貫通して上端に放散ノズ
ル１０を有し、下端に設けた吸引口１１はタンク
内底部に臨まされている。 9 is a discharge pipe; a suspended deck 7;
It penetrates the cold insulation material 8 and the outer tank roof 6 and has a dispersion nozzle 10 at the upper end, and a suction port 11 provided at the lower end faces the inner bottom of the tank.
１２は乾燥窒素ガスの供給管で外槽屋根６を貫
通し、窒素ガス供給装置１３の蒸発器１４に接続
され、該蒸発器１４はスチームボイラ１５により
加熱され、窒素ガス源１６に接続されている。 12 is a dry nitrogen gas supply pipe that penetrates the outer tank roof 6 and is connected to an evaporator 14 of a nitrogen gas supply device 13, which is heated by a steam boiler 15 and connected to a nitrogen gas source 16. There is.
而して、第２図に示す様に、繊維状保冷材のグ
ラスウールマツト８が多数の各ユニツト１７ごと
に隣接状態でサスペンデツドデツキ７上に敷設さ
れているが、その各ユニツトのグラスウールマツ
ト８の最上面には遮熱膜としての設定薄肉厚さの
アルミ箔１８，１８…が添設載置され、該各アル
ミ箔１８には所定間隔で設定径のピンホール状の
小孔１９，１９…が多数穿設され、ユニツト保冷
材８の内部と外槽屋根６の下部空間２０とを連通
する機能を有し、且つ、該外槽屋根６からの輻射
熱を遮断する機能も有するようにされている。 As shown in FIG. 2, glass wool mats 8, which are fibrous cold insulators, are laid on the suspended deck 7 adjacent to each of a large number of units 17. Aluminum foils 18, 18, . 19... are bored in large numbers so as to have the function of communicating the inside of the unit cold insulation material 8 and the lower space 20 of the outer tank roof 6, and also have the function of blocking radiant heat from the outer tank roof 6. has been done.
上述構成において、タンク１の建造後スタート
アツプ時に際し、タンク内のO2パージと、水蒸
気湿分に対するドライングを行うべく、窒素ガス
供給管１２を窒素ガス供給装置１３に接続して乾
燥窒素ガスをタンク内に供給し、O2パージと水
蒸気湿分に対するドライングを行つていく。 In the above configuration, when starting up the tank 1 after construction, the nitrogen gas supply pipe 12 is connected to the nitrogen gas supply device 13 to supply dry nitrogen gas in order to purge the tank with O 2 and dry the tank against water vapor moisture. Supply it into the tank and perform O 2 purge and drying to remove water vapor and moisture.
この過程において、前述した如く、保冷材８内
の大気と窒素ガスの対流混合は無理であるが、該
保冷材８の上面の遮熱膜のアルミ箔１８に多数の
ピンホール状の小孔１９，１９…が穿設されてい
ることにより保冷材８内と外槽屋根６の下部空間
２０は連通され、したがつて、該保冷材８中の先
在大気の水蒸気はその分圧によつて窒素ガスとの
拡散がより促進され、これにユニツト保冷材８の
ユニツト１７，１７間の各目地の継手間の間を介
しての拡散も加わり、早期にドライングは終了す
る。 In this process, as mentioned above, convective mixing of the atmosphere and nitrogen gas inside the cold insulating material 8 is impossible, but there are many pinhole-like small holes 19 in the aluminum foil 18 of the heat shielding film on the top surface of the cold insulating material 8. , 19... are bored, the inside of the cold insulation material 8 and the lower space 20 of the outer tank roof 6 are communicated with each other, and therefore, the water vapor in the preexisting atmosphere in the cold insulation material 8 is caused by its partial pressure. Diffusion with nitrogen gas is further promoted, and diffusion through the joints between the units 17, 17 of the unit cold insulating material 8 is also added to this, and the drying ends quickly.
その間、外槽屋根６からの輻射熱は保冷材８上
面のアルミ箔１８により反射され遮熱される。 During this time, the radiant heat from the outer tank roof 6 is reflected by the aluminum foil 18 on the upper surface of the cold insulation material 8 and is thermally shielded.
この場合、各小孔１９，１９…はそれらの総和
面積も小さいので遮熱機能は低くはされない。 In this case, since the total area of each of the small holes 19, 19, . . . is small, the heat shielding function is not reduced.
したがつて、該小孔１９，１９…を設定径以上
にすることは遮熱効率を低下させるので好ましく
ない。 Therefore, it is not preferable to make the small holes 19, 19, . . . larger than the set diameter because it lowers the heat shielding efficiency.
このようにして、保冷材８中の水蒸気湿分が拡
散されてタンク内の先在大気中に混入していく
と、湿分の水蒸気はタンク内を下降していき、ピ
ストン効果によりO2パージを行うと共にドライ
ングが行われ、大気放出管９を介して大気に放散
される。 In this way, when the water vapor moisture in the cold insulation material 8 is diffused and mixed into the existing atmosphere inside the tank, the moisture vapor moves down inside the tank, and O 2 purge occurs due to the piston effect. At the same time, drying is performed, and the air is discharged into the atmosphere via the atmosphere discharge pipe 9.
そして、図示しない露点センサによりドライン
グ終了を確認する。 Then, completion of drying is confirmed by a dew point sensor (not shown).
尚、この発明の実施態様は上述実施例に限るも
のでないことは勿論であり、例えば、タンク最外
周のユニツト保冷材の側面にも薄膜被覆する等し
てその部分にも小孔を穿設する等種々の態様が採
用可能である。 It should be noted that the embodiments of the present invention are of course not limited to the above-mentioned embodiments; for example, the side surface of the unit cold insulation material at the outermost periphery of the tank may also be coated with a thin film, and small holes may be drilled in that portion as well. Various aspects such as the above can be adopted.
〈発明の効果〉
以上、この発明によれば、LNG等の低温液化
ガスタンクのドライングを行うに際し、外槽屋根
から吊設したサスペンデツドデツキ上の繊維状保
冷材の少くとも上面に添設した遮熱膜の上面に多
数の小孔を穿設したことにより、該保冷材の内部
と外槽屋根の下部空間とが連通状態とすることが
出来、したがつて、供給する窒素ガス等の不活性
ガスが保冷材との間でその内部の先在大気の水蒸
気湿分の水蒸気分圧による拡散を促進し、したが
つて、ドライングが早期に終了する優れた効果が
奏される。<Effects of the Invention> As described above, according to the present invention, when drying a low-temperature liquefied gas tank such as LNG, a cooling material attached to at least the upper surface of a fibrous cold insulating material on a suspended deck suspended from the outer tank roof. By drilling a large number of small holes in the upper surface of the heat shielding membrane, the inside of the cold insulation material and the space under the outer tank roof can be communicated with each other, and therefore, the supply of nitrogen gas, etc. can be prevented. The active gas promotes the diffusion of water vapor moisture in the preexisting atmosphere inside the cold insulating material due to the water vapor partial pressure, and therefore, an excellent effect is achieved in which drying ends quickly.
又、ドライングが早期に終了するため、使用不
活性ガスの量も著るしく少量で済み、コストダウ
ンが図れる利点もある。 Furthermore, since the drying process is completed early, the amount of inert gas used can be significantly reduced, which has the advantage of reducing costs.
そして、ドライングが早期に終了することか
ら、スタートアツプ工事も早期に完了することが
出来るメリツトもある。 Furthermore, since the drying process is completed early, there is also the advantage that the start-up construction work can be completed early.
而して、同時併行的になされるO2パージにも
何ら支障がない良さもあり、そのうえ、保冷材上
面の屋根からの輻射熱遮断の機能も実質的に低下
しない利点がある。 Therefore, there is an advantage that there is no problem with the O 2 purge that is performed simultaneously, and there is also an advantage that the function of blocking radiant heat from the roof on the upper surface of the cold insulating material is not substantially deteriorated.
図面はこの発明の１実施例の説明図であり、第
１図は全体概略断面図、第２図は保冷材の部分拡
大斜視図である。
３…外槽、４…断熱層、５…内槽、６…外槽屋
根、７…サスペンデツドデツキ、１…タンク、８
…保冷材、１８…遮熱膜、１９…小孔、２０…空
間。
The drawings are explanatory diagrams of one embodiment of the present invention, with FIG. 1 being a general schematic sectional view and FIG. 2 being a partially enlarged perspective view of a cold insulator. 3... Outer tank, 4... Heat insulation layer, 5... Inner tank, 6... Outer tank roof, 7... Suspended deck, 1... Tank, 8
... Cold insulation material, 18 ... Heat shielding film, 19 ... Small hole, 20 ... Space.
Claims (1)
槽屋根からサスペンデツドデツキが吊設された低
温液化ガスタンクの該サスペンデツドデツキ上に
敷設され遮熱膜を上面に添設されている繊維状保
冷材の構造において、該保冷材の上面に添設され
た上記遮熱膜に多数の小孔が穿設され、該保冷材
内と屋根の下部空間とが連通状態にされているこ
とを特徴とする低温液化ガスタンクのサスペンデ
ツドデツキ保冷材構造。1. A low temperature liquefied gas tank in which an inner tank is provided to the outer tank through a heat insulating layer and a suspended deck is suspended from the roof of the outer tank. In the structure of the fibrous cold insulating material, a large number of small holes are bored in the heat shielding film attached to the upper surface of the cold insulating material, so that the interior of the cold insulating material and the space under the roof are in communication. A suspended deck cold insulation structure for low temperature liquefied gas tanks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10542282A JPS58225297A (en) | 1982-06-21 | 1982-06-21 | Structure of low-temperature insulating material for suspended deck of low-temperature liquefied gas tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10542282A JPS58225297A (en) | 1982-06-21 | 1982-06-21 | Structure of low-temperature insulating material for suspended deck of low-temperature liquefied gas tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58225297A JPS58225297A (en) | 1983-12-27 |
| JPH0417302B2 true JPH0417302B2 (en) | 1992-03-25 |
Family
ID=14407155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10542282A Granted JPS58225297A (en) | 1982-06-21 | 1982-06-21 | Structure of low-temperature insulating material for suspended deck of low-temperature liquefied gas tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58225297A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60167896U (en) * | 1984-04-17 | 1985-11-07 | 日萬礦産株式会社 | Suspended ceilings for LNG underground storage tanks, etc. |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023061A (en) * | 1973-07-06 | 1975-03-12 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5822000Y2 (en) * | 1979-12-21 | 1983-05-10 | 日本鋼管株式会社 | Suspended roof structure of liquid storage tank |
-
1982
- 1982-06-21 JP JP10542282A patent/JPS58225297A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023061A (en) * | 1973-07-06 | 1975-03-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58225297A (en) | 1983-12-27 |
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