JP2000042397A - Low-temperature liquefied gas feed equipment - Google Patents
Low-temperature liquefied gas feed equipmentInfo
- Publication number
- JP2000042397A JP2000042397A JP10215651A JP21565198A JP2000042397A JP 2000042397 A JP2000042397 A JP 2000042397A JP 10215651 A JP10215651 A JP 10215651A JP 21565198 A JP21565198 A JP 21565198A JP 2000042397 A JP2000042397 A JP 2000042397A
- Authority
- JP
- Japan
- Prior art keywords
- low
- liquefied gas
- storage tank
- filter device
- temperature liquefied
- 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.)
- Granted
Links
- 238000003860 storage Methods 0.000 claims abstract description 37
- 230000001954 sterilising effect Effects 0.000 claims description 39
- 238000004659 sterilization and disinfection Methods 0.000 claims description 38
- 230000000249 desinfective effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 92
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 45
- 239000007788 liquid Substances 0.000 abstract description 44
- 239000007789 gas Substances 0.000 abstract description 39
- 238000009834 vaporization Methods 0.000 abstract description 11
- 230000008016 vaporization Effects 0.000 abstract description 11
- 238000004781 supercooling Methods 0.000 abstract description 7
- 241000894006 Bacteria Species 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 244000005700 microbiome Species 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 3
- 238000011045 prefiltration Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011012 sanitization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- 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
液化ガスに含まれている微生物やその芽胞を除去する除
菌設備に関し、特に、低温液化ガスの輸送中に除菌を行
う除菌設備に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disinfecting apparatus for removing microorganisms and spores thereof contained in a low-temperature liquefied gas such as liquid nitrogen, and more particularly to a disinfecting apparatus for removing bacteria during transportation of a low-temperature liquefied gas. It concerns equipment.
【０００２】[0002]
【従来の技術】食品や飲料、薬品等の加工・製造分野に
おいては、瞬間冷凍や容器内の酸素パージのために液体
窒素が利用されている。かかる目的で使用される液体窒
素は、貯槽から液相のままで使用点まで供給されるのが
一般的である。2. Description of the Related Art In the field of processing and production of foods, beverages, chemicals and the like, liquid nitrogen is used for flash freezing and oxygen purging in containers. Generally, liquid nitrogen used for such a purpose is supplied from a storage tank to a point of use in a liquid phase.
【０００３】ところで、液体窒素は極めて低温であるに
も拘わらず、その中に微生物やその芽胞が生存している
ことがある。このような微生物及び芽胞は、食品等を取
り扱う分野においては、衛生面や安全面等の観点から除
去されることが好ましく、また除去しなければならない
ケースもある。このため、液体窒素の供給ライン中に除
菌フィルタ装置を配置することが従来から考えられてい
る。[0003] By the way, despite the extremely low temperature of liquid nitrogen, microorganisms and their spores may survive there. In the field of handling foods and the like, such microorganisms and spores are preferably removed from the viewpoints of hygiene and safety, and in some cases, must be removed. Therefore, it has been conventionally considered to dispose a sterilization filter device in a liquid nitrogen supply line.
【０００４】しかしながら、除菌フィルタ装置における
フィルタ要素は非常に目が細かいため、液体窒素の流れ
に大きな圧力損失（圧力降下）を生じ、これがために、
液体窒素の一部が気化するという問題があった。[0004] However, the filter element in the sterilization filter device is very fine, and causes a large pressure loss (pressure drop) in the flow of liquid nitrogen.
There was a problem that a part of liquid nitrogen was vaporized.
【０００５】そこで、例えば特開平９−１６６２９４号
公報に示されているように、除菌フィルタ装置の出口部
に凝縮コイルを接続すると共に、除菌フィルタ装置及び
凝縮コイルを過冷却槽内の液体窒素に浸漬させた除菌設
備が開発されている。Therefore, as shown in Japanese Patent Application Laid-Open No. Hei 9-166294, for example, a condensing coil is connected to the outlet of the sterilizing filter device, and the sterilizing filter device and the condensing coil are connected to a liquid in a supercooling tank. A disinfection facility immersed in nitrogen has been developed.
【０００６】[0006]
【発明が解決しようとする課題】この除菌設備では、除
菌フィルタを通過し一部が気化した窒素を凝縮コイルに
おいて冷却し、凝縮（液化）することができる。In this disinfection equipment, nitrogen that has passed through the disinfection filter and has partially vaporized can be cooled and condensed (liquefied) in the condensing coil.
【０００７】しかしながら、気化した窒素を低温液槽内
で凝縮するためには、多量の過冷却状態の液体窒素又は
他の極低温液体が必要であり、装置が大型化する傾向が
あり、また、エネルギ効率が悪いという問題点があっ
た。However, in order to condense the vaporized nitrogen in the low-temperature liquid tank, a large amount of supercooled liquid nitrogen or other cryogenic liquid is required, which tends to increase the size of the apparatus. There is a problem that energy efficiency is poor.
【０００８】本発明は、かかる事情に鑑みてなされたも
のであり、除菌フィルタ装置を備える低温液化ガス供給
設備であって、凝縮用の過冷却槽を必須とすることな
く、液体窒素等の低温液化ガスの気化を最小限に抑制す
ることのできるものを提供することにある。The present invention has been made in view of the above circumstances, and is a low-temperature liquefied gas supply facility equipped with a sterilizing filter device, which does not require a supercooling tank for condensation and can remove liquid nitrogen or the like. It is an object of the present invention to provide a device capable of minimizing vaporization of a low-temperature liquefied gas.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、低温液化ガスを貯蔵する貯槽と、この貯
槽の下端に接続され、当該貯槽から低温液化ガスを取り
出して使用点に供給する供給ラインと、供給ラインに設
けられた除菌フィルタ装置とを備える低温液化ガス供給
設備において、除菌フィルタ装置におけるフィルタ要素
を貯槽（二重殻型貯槽の場合は内槽）の下端よりも低い
位置に配置したことを特徴としている。In order to achieve the above object, the present invention provides a storage tank for storing a low-temperature liquefied gas, and a low-temperature liquefied gas connected to the lower end of the storage tank. In a low-temperature liquefied gas supply system comprising a supply line for supplying and a sterilization filter device provided in the supply line, a filter element in the sterilization filter device is stored at a lower end of a storage tank (in the case of a double shell type storage tank, an inner tank). Is also arranged at a lower position.
【００１０】貯槽の底部における低温液化ガスは過冷却
状態にあるが、前述したように貯槽の下端よりも低い位
置にフィルタ要素を配置することで、低温液化ガスは過
冷却状態を保ったままフィルタ要素に送られることにな
る。低温液化ガスが過冷却状態にある場合、フィルタ要
素を通過する際に圧力損失が生じても、気化は抑制され
る。かかる観点に基づき、貯槽に対する除菌フィルタ装
置の位置を適宜定めることで、除菌フィルタ装置の通過
時に生ずる低温液化ガスの気化を最小限に抑制すること
が可能となる。Although the low-temperature liquefied gas at the bottom of the storage tank is in a supercooled state, by disposing the filter element at a position lower than the lower end of the storage tank as described above, the low-temperature liquefied gas is filtered while maintaining the supercooled state. Will be sent to the element. When the low-temperature liquefied gas is in a supercooled state, vaporization is suppressed even if a pressure loss occurs when passing through the filter element. From this viewpoint, by appropriately setting the position of the sterilization filter device with respect to the storage tank, it is possible to minimize the vaporization of the low-temperature liquefied gas generated when passing through the sterilization filter device.
【００１１】また、除菌フィルタ装置に供給された低温
液化ガスの一部を貯槽に戻すリターンラインを設けた場
合、除菌フィルタ装置に流入される低温液化ガスの流量
を増加させることができる。これは、過冷却状態の維持
に役立つ。When a return line is provided for returning a part of the low-temperature liquefied gas supplied to the sterilization filter device to the storage tank, the flow rate of the low-temperature liquefied gas flowing into the sterilization filter device can be increased. This helps to maintain a supercooled state.
【００１２】上記構成を採っても除菌フィルタ装置内で
は極く僅かに低温液化ガスは気化する。従って、このガ
スを貯槽に戻すガスラインを設け、且つ、このガスライ
ンに圧力調整弁を設けることで、貯槽内の圧力を当該ガ
スによって調整することが可能となる。Even if the above configuration is adopted, the low-temperature liquefied gas is very slightly vaporized in the sterilization filter device. Therefore, by providing a gas line for returning this gas to the storage tank and providing a pressure adjusting valve in this gas line, the pressure in the storage tank can be adjusted by the gas.
【００１３】[0013]
【発明が解決しようとする課題】図１は、本発明による
低温液化ガス供給設備の一実施形態を示す概略説明図で
ある。なお、この実施形態では液体窒素を低温液化ガス
として説明するが、他の低温液化ガスについても本発明
は適用可能である。FIG. 1 is a schematic explanatory view showing one embodiment of a low-temperature liquefied gas supply facility according to the present invention. In this embodiment, liquid nitrogen is described as a low-temperature liquefied gas, but the present invention is applicable to other low-temperature liquefied gases.
【００１４】図１において、符号１０は、液体窒素１２
を貯蔵する真空断熱式の二重殻型貯槽である。この貯槽
１０における内槽１４の底部鏡板１４ａには供給ライン
である配管１６が接続されており、外槽１８の底部鏡板
１８ａを貫通して外部に延びている。配管１６は、貯槽
１０の外部において断熱構造となっており、液体窒素１
２を液相のまま使用点（図示せず）まで輸送することが
できるようになっている。In FIG. 1, reference numeral 10 denotes liquid nitrogen 12
It is a vacuum-insulated double-shell storage tank that stores the water. A pipe 16 as a supply line is connected to the bottom end plate 14a of the inner tank 14 in the storage tank 10, and extends to the outside through the bottom end plate 18a of the outer tank 18. The pipe 16 has a heat insulating structure outside the storage tank 10,
2 can be transported in a liquid phase to a point of use (not shown).
【００１５】また、貯槽１０における内槽１４の底部鏡
板１４ａと頂部鏡板１４ｂとの間には圧力調整用の配管
２０が接続されている。この配管２０には蒸発器２２及
び圧力調整弁２４が介設されており、内槽１４の内部圧
力が一定となるよう構成されている。A pressure adjusting pipe 20 is connected between the bottom end plate 14a and the top end plate 14b of the inner tank 14 in the storage tank 10. An evaporator 22 and a pressure regulating valve 24 are interposed in the pipe 20 so that the internal pressure of the inner tank 14 is kept constant.
【００１６】貯槽１０から使用点まで延びる配管１６に
は除菌フィルタ装置２６が介設されている。この除菌フ
ィルタ装置２６は、液体窒素１２中で生存する微生物及
びその芽胞を除去するためのフィルタ要素２８を有する
ものである。かかるフィルタ要素２８としては、孔の大
きさが０．２μｍ以下の限外濾過膜から構成されたもの
が好適である。また、除菌フィルタ装置２６の型式とし
ては中空糸型やスパイラル型等、種々あるが、圧力損失
を抑制するためには、図示するように、限外濾過膜によ
り円筒形に構成されたフィルタ要素２８を円筒形容器３
０に収容したいわゆるチューブ型が好ましい。A sanitizing filter device 26 is provided on the pipe 16 extending from the storage tank 10 to the point of use. This sterilization filter device 26 has a filter element 28 for removing microorganisms living in the liquid nitrogen 12 and their spores. As the filter element 28, an element formed of an ultrafiltration membrane having a pore size of 0.2 μm or less is preferable. Further, there are various types of the sterilization filter device 26 such as a hollow fiber type and a spiral type, but in order to suppress the pressure loss, as shown in the drawing, a filter element formed by an ultrafiltration membrane into a cylindrical shape is used. 28 is a cylindrical container 3
A so-called tube type housed in a zero is preferred.
【００１７】図示のチューブ型除菌フィルタ装置２６に
おいて、円筒形容器３０の一端には液体窒素の入口３２
が形成され、他端には出口３４が形成されている。出口
３４はフィルタ要素２８の内部空間に連通されている。
従って、入口３２から導入された液体窒素１２は、容器
３０とフィルタ要素２８との間の空間を経て、フィルタ
要素２８の内部空間に流れ、この際に微生物等がフィル
タ要素２８によって除去される。そして、その後、無菌
となった液体窒素は出口３４から排出される。In the illustrated tube-type sterilization filter device 26, one end of a cylindrical container 30 has an inlet 32 for liquid nitrogen.
Is formed, and an outlet 34 is formed at the other end. The outlet 34 communicates with the internal space of the filter element 28.
Accordingly, the liquid nitrogen 12 introduced from the inlet 32 flows through the space between the container 30 and the filter element 28 into the internal space of the filter element 28, and at this time, microorganisms and the like are removed by the filter element 28. Thereafter, the sterilized liquid nitrogen is discharged from the outlet 34.
【００１８】本発明において、除菌フィルタ装置２６
は、少なくともフィルタ要素２８の全体が貯槽１０の内
槽１４の下端、すなわち配管１６との接続点よりも低い
位置となるように、配置されている。より好ましくは、
図示の如く、除菌フィルタ装置２６の全体が内槽１４の
下端よりも低い位置に配置される。このような位置関係
で除菌フィルタ装置２６を配置した場合、除菌フィルタ
装置２６の入口３２における液体窒素１２の圧力は内槽
１４の下端における圧力よりも高くなる。In the present invention, the sterilization filter device 26
Are arranged so that at least the entire filter element 28 is at a position lower than the lower end of the inner tank 14 of the storage tank 10, that is, a connection point with the pipe 16. More preferably,
As shown, the entire sterilization filter device 26 is disposed at a position lower than the lower end of the inner tank 14. When disinfecting filter device 26 is arranged in such a positional relationship, the pressure of liquid nitrogen 12 at inlet 32 of disinfecting filter device 26 is higher than the pressure at the lower end of inner tank 14.
【００１９】内槽１４内及び配管１６内の液体窒素１２
の温度はほぼ一定に保たれている。一方、内槽１４内の
液体窒素１２は底部ほど高圧となっている。このため、
内槽１４の底部における液体窒素１２の飽和温度は内槽
上部よりも高いが、液体窒素１２の実際の温度は内槽１
４全体でほぼ一定となっているため、内槽底部の液体窒
素１２は過冷却の状態にある。前述したように、図示実
施形態では除菌フィルタ装置２６が内槽１４の下端より
も下方に配置されているため、内槽１４内の液体窒素１
２は過冷却状態を維持したまま、除菌フィルタ装置２６
に供給されることになる。The liquid nitrogen 12 in the inner tank 14 and the pipe 16
Is kept almost constant. On the other hand, the liquid nitrogen 12 in the inner tank 14 has a higher pressure toward the bottom. For this reason,
Although the saturation temperature of the liquid nitrogen 12 at the bottom of the inner tank 14 is higher than that of the upper part of the inner tank, the actual temperature of the liquid nitrogen 12 is
The liquid nitrogen 12 at the bottom of the inner tank is in a supercooled state because it is substantially constant over the whole of the tank 4. As described above, in the illustrated embodiment, since the sterilization filter device 26 is disposed below the lower end of the inner tank 14, the liquid nitrogen 1
2 is a sterilization filter device 26 while maintaining the supercooled state.
Will be supplied.
【００２０】液体窒素１２が除菌フィルタ装置２６のフ
ィルタ要素２８を通過する際、従来と同様に液体窒素１
２に圧力損失が生ずるが、フィルタ要素２８全体が内槽
１４よりも低い位置にあり且つ入口３２での液体窒素１
２が過冷却状態を保っているため、前記圧力損失による
気化は抑制されることになる。これにより、液体窒素１
２は、その大部分が液相を保ったまま、除菌フィルタ装
置２６を通過することができ、無菌の液体窒素１２が効
率よく使用点に供給される。When the liquid nitrogen 12 passes through the filter element 28 of the sterilization filter device 26, the liquid nitrogen 1
2 causes a pressure drop, but the entire filter element 28 is lower than the inner tank 14 and the liquid nitrogen 1
2 keeps the supercooled state, so that the vaporization due to the pressure loss is suppressed. Thereby, liquid nitrogen 1
2 can pass through the disinfection filter device 26 while maintaining the liquid phase for the most part, and the aseptic liquid nitrogen 12 is efficiently supplied to the point of use.
【００２１】なお、除菌フィルタ装置２６における圧力
損失、すなわち入口３２と出口３４における圧力差は予
め求めておくことができるため、この圧力差を考慮し
て、除菌フィルタ装置２６の出口３４においても液体窒
素が十分に過冷却状態を維持するよう、除菌フィルタ装
置２６の設置位置を定めることが好ましい。Since the pressure loss in the sterilizing filter device 26, that is, the pressure difference between the inlet 32 and the outlet 34 can be determined in advance, the pressure difference at the outlet 34 of the sterilizing filter device 26 is considered in consideration of the pressure difference. Also, it is preferable to determine the installation position of the sterilization filter device 26 so that the liquid nitrogen maintains a sufficiently supercooled state.
【００２２】除菌フィルタ装置２６と貯槽１０との間の
配管１６の長さについても、その部分での圧力損失を小
さくするために、可能な限り短いものとすることが好ま
しい。It is preferable that the length of the pipe 16 between the sterilizing filter device 26 and the storage tank 10 is as short as possible in order to reduce the pressure loss at that portion.
【００２３】また、配管１６及び除菌フィルタ装置２６
における流路断面積が大きく、液体窒素１２の流量が多
いほど、過冷却状態を維持しやすい。従って、配管１６
の管径を大きくすると共に、除菌フィルタ装置２６の容
器３０から濾過前の液体窒素の一部を取り出し、配管
（リターンライン）３６により貯槽１０の内槽１４に戻
すことが有効である。ここで、図１において配管３６の
内槽１４内での端部が貯槽１４の下端よりも高い位置に
あるよう示されているが、これは、配管１６、除菌フィ
ルタ装置２６及び配管３６を通しての液体窒素１２の循
環が円滑に行われるようにするためである。The piping 16 and the sterilizing filter 26
The larger the cross-sectional area of the flow path and the larger the flow rate of the liquid nitrogen 12, the more easily the supercooled state is maintained. Therefore, piping 16
It is effective to increase the diameter of the tube and to take out a part of the liquid nitrogen before filtration from the container 30 of the sterilization filter device 26 and return the liquid nitrogen to the inner tank 14 of the storage tank 10 by a pipe (return line) 36. Here, in FIG. 1, the end of the pipe 36 in the inner tank 14 is shown to be at a position higher than the lower end of the storage tank 14, but this is through the pipe 16, the sterilization filter device 26, and the pipe 36. This is to make the circulation of the liquid nitrogen 12 smoothly.
【００２４】更に、除菌フィルタ装置２６に液体窒素１
２を供給する前に比較的大きな異物を除去し、フィルタ
要素２８の目詰まりを防止するために、貯槽１０と除菌
フィルタ装置２６との間の配管１６にプレフィルタ装置
３８を設けてもよい。かかる場合、プレフィルタ装置３
８を流れる液体窒素１２の一部を貯槽１４に戻すことが
好ましい。なお、プレフィルタ装置３８は、液体窒素１
２を貯槽１０に充填するための配管４０に設けてもよ
い。Further, the liquid nitrogen 1
A pre-filter device 38 may be provided in the pipe 16 between the storage tank 10 and the germicidal filter device 26 to remove relatively large foreign matter before supplying 2 and prevent clogging of the filter element 28. . In such a case, the pre-filter device 3
It is preferable to return a part of the liquid nitrogen 12 flowing through the storage tank 8 to the storage tank 14. In addition, the pre-filter device 38 is a liquid nitrogen 1
2 may be provided in a pipe 40 for filling the storage tank 10.
【００２５】図２は、本発明の第２の実施形態を示す概
略説明図であり、第１の実施形態と同一又は相当部分に
は同一符号を付し、その詳細な説明は省略する。FIG. 2 is a schematic explanatory view showing a second embodiment of the present invention. The same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
【００２６】この第２の実施形態においては、チューブ
型除菌フィルタ装置２６の入口３２と出口３４が逆向き
に配置されている点で第１の実施形態と異なっている。
すなわち、この図２の構成では、フィルタ要素２８の内
部空間に微生物等を含む液体窒素１２が導入され、フィ
ルタ要素２８と容器３０との間の空間には無菌となった
液体窒素１２が流入する。The second embodiment differs from the first embodiment in that the inlet 32 and the outlet 34 of the tube-type sterilization filter device 26 are arranged in opposite directions.
That is, in the configuration of FIG. 2, liquid nitrogen 12 containing microorganisms and the like is introduced into the internal space of filter element 28, and sterile liquid nitrogen 12 flows into the space between filter element 28 and container 30. .
【００２７】前述したように、本発明に従って除菌フィ
ルタ装置２６を位置決めした場合、除菌フィルタ装置２
６内での液体窒素１２の気化は最小限に抑制されるが、
極く少量の気化は避けられない。図２の構成において、
この気化した窒素は容器３０とフィルタ要素２８との間
の空間に蓄積される。従来、このような窒素ガスは大気
に放出していたが、図２の実施形態では、容器３０の上
板にガス配管（ガスライン）４２を接続すると共に、ガ
ス配管４２の他端を貯槽１０における内槽１４の頂部鏡
板１４ａに接続し、除菌フィルタ装置２６内で発生した
窒素ガスを内槽１４に戻すようにしている。また、この
ガス配管４２の途中には圧力調整弁４４が設けられてお
り、これにより内槽１４の内部圧力が一定に調整される
ようになっている。従って、図１において符号２０，２
２，２４で示した圧力調整用の配管系統は不要となり、
設備のコンパクト化に寄与することになる。As described above, when the disinfection filter device 26 is positioned according to the present invention, the disinfection filter device 2
The vaporization of liquid nitrogen 12 in 6 is minimized,
A very small amount of vaporization is inevitable. In the configuration of FIG.
This vaporized nitrogen accumulates in the space between the container 30 and the filter element 28. Conventionally, such nitrogen gas is released to the atmosphere. In the embodiment of FIG. 2, a gas pipe (gas line) 42 is connected to the upper plate of the container 30 and the other end of the gas pipe 42 is connected to the storage tank 10. Is connected to the top end plate 14a of the inner tank 14 to return the nitrogen gas generated in the sterilization filter device 26 to the inner tank 14. A pressure regulating valve 44 is provided in the middle of the gas pipe 42 so that the internal pressure of the inner tank 14 is regulated to be constant. Therefore, in FIG.
The piping system for pressure adjustment shown in 2, 24 becomes unnecessary,
This will contribute to making the equipment more compact.
【００２８】以上、本発明の好適な実施形態について詳
細に説明したが、本発明は上記実施形態に限定されない
ことは言うまでもない。例えば、上でも述べたように、
除菌フィルタ装置の型式はチューブ型以外のものであっ
てもよく、また、除菌フィルタ装置を過冷却槽に浸漬さ
せてもよい。但し、本発明によれば除菌フィルタ装置内
での気化量は少ないため、過冷却槽は従来のものに比し
て極めて小型のもので足る。Although the preferred embodiments of the present invention have been described in detail, it goes without saying that the present invention is not limited to the above embodiments. For example, as mentioned above,
The type of the sterilization filter device may be other than the tube type, and the sterilization filter device may be immersed in a supercooling tank. However, according to the present invention, since the amount of vaporization in the sterilization filter device is small, an extremely small supercooling tank is sufficient as compared with the conventional one.
【００２９】[0029]
【発明の効果】以上述べたように、本発明においては、
液体窒素等の低温液化ガスの輸送中に除菌フィルタ装置
を用いて除菌を行う場合に、除菌フィルタ装置内部での
気化を抑制することが可能となる。従って、この気化の
問題を回避するために従来必要であって過冷却槽が必須
ではなくなり、これに伴って過冷却槽で用いられる極低
温液体も不要となり又は低減される。よって、低温液化
ガス供給設備の小型化が可能となり、また、エネルギ効
率も向上される。As described above, in the present invention,
When sterilization is performed using a sterilization filter device during transportation of a low-temperature liquefied gas such as liquid nitrogen, vaporization inside the sterilization filter device can be suppressed. Therefore, in order to avoid this problem of vaporization, a supercooling tank which is conventionally required is not required, and the cryogenic liquid used in the supercooling tank is not required or reduced accordingly. Therefore, the size of the low-temperature liquefied gas supply equipment can be reduced, and the energy efficiency can be improved.
【図１】本発明による低温液化ガス供給設備の第１の実
施形態を示す概略説明図である。FIG. 1 is a schematic explanatory view showing a first embodiment of a low-temperature liquefied gas supply facility according to the present invention.
【図２】本発明による低温液化ガス供給設備の第２の実
施形態を示す概略説明図である。FIG. 2 is a schematic explanatory view showing a second embodiment of the low-temperature liquefied gas supply equipment according to the present invention.
１０…貯槽、１２…液体窒素（低温液化ガス）、１４…
内槽、１６…配管（供給ライン）、２６…除菌フィルタ
装置、２８…フィルタ要素、３０…容器、３６…配管
（リターンライン）、４２…ガス配管（ガスライン）。10 ... storage tank, 12 ... liquid nitrogen (low temperature liquefied gas), 14 ...
Inner tank, 16: pipe (supply line), 26: sterilization filter device, 28: filter element, 30: container, 36: pipe (return line), 42: gas pipe (gas line).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 井上 義則 兵庫県加古郡播磨町新島16番 日本エア・ リキード株式会社播磨テクニカルセンター 内 Ｆターム(参考） 3E073 AA01 BA21 DB03 4G068 AA01 AB12 AC02 AC16 AD03 AD12 AF40 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yoshinori Inoue No. 16 Niijima, Harima-cho, Kako-gun, Hyogo Japan Air Liquide Corporation Harima Technical Center F-term (reference) 3E073 AA01 BA21 DB03 4G068 AA01 AB12 AC02 AC16 AD03 AD12 AF40
Claims (3)
槽の下端に接続され、前記貯槽から低温液化ガスを取り
出して使用点に供給する供給ラインと、前記供給ライン
に設けられた除菌フィルタ装置とを備え、前記除菌フィ
ルタ装置におけるフィルタ要素を前記貯槽の下端よりも
低い位置に配置したことを特徴とする低温液化ガス供給
設備。1. A storage tank for storing a low-temperature liquefied gas, a supply line connected to a lower end of the storage tank, for taking out the low-temperature liquefied gas from the storage tank and supplying it to a point of use, and a disinfecting filter provided in the supply line A low-temperature liquefied gas supply facility, characterized in that a filter element in the sterilization filter device is arranged at a position lower than a lower end of the storage tank.
液化ガスの一部を前記貯槽に戻すリターンラインを備え
ることを特徴とする請求項１に記載の低温液化ガス供給
設備。2. The low-temperature liquefied gas supply equipment according to claim 1, further comprising a return line for returning a part of the low-temperature liquefied gas supplied to the sterilization filter device to the storage tank.
を前記貯槽に戻すガスラインと、該ガスラインに設けら
れた圧力調整弁とを備えることを特徴とする請求項１に
記載の低温液化ガス供給設備。3. The low-temperature liquefaction apparatus according to claim 1, further comprising: a gas line for returning gas vaporized in the sterilization filter device to the storage tank; and a pressure regulating valve provided on the gas line. Gas supply equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21565198A JP4246292B2 (en) | 1998-07-30 | 1998-07-30 | Low temperature liquefied gas supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21565198A JP4246292B2 (en) | 1998-07-30 | 1998-07-30 | Low temperature liquefied gas supply equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000042397A true JP2000042397A (en) | 2000-02-15 |
| JP4246292B2 JP4246292B2 (en) | 2009-04-02 |
Family
ID=16675939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21565198A Expired - Lifetime JP4246292B2 (en) | 1998-07-30 | 1998-07-30 | Low temperature liquefied gas supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4246292B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010203524A (en) * | 2009-03-03 | 2010-09-16 | Tokyo Gas Co Ltd | Cryogenic liquid delivering system and cryogenic liquid delivering method |
| KR101651041B1 (en) * | 2015-08-10 | 2016-09-05 | 한국항공우주연구원 | Apparatus and method for supplying cryogenic gas and liquid |
| JP2018051454A (en) * | 2016-09-27 | 2018-04-05 | 岩谷産業株式会社 | Liquid nitrogen feed system |
-
1998
- 1998-07-30 JP JP21565198A patent/JP4246292B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010203524A (en) * | 2009-03-03 | 2010-09-16 | Tokyo Gas Co Ltd | Cryogenic liquid delivering system and cryogenic liquid delivering method |
| KR101651041B1 (en) * | 2015-08-10 | 2016-09-05 | 한국항공우주연구원 | Apparatus and method for supplying cryogenic gas and liquid |
| JP2018051454A (en) * | 2016-09-27 | 2018-04-05 | 岩谷産業株式会社 | Liquid nitrogen feed system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4246292B2 (en) | 2009-04-02 |
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