JPS5828509B2 - air separation equipment - Google Patents
air separation equipmentInfo
- Publication number
- JPS5828509B2 JPS5828509B2 JP3910081A JP3910081A JPS5828509B2 JP S5828509 B2 JPS5828509 B2 JP S5828509B2 JP 3910081 A JP3910081 A JP 3910081A JP 3910081 A JP3910081 A JP 3910081A JP S5828509 B2 JPS5828509 B2 JP S5828509B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling tower
- air
- valve
- water washing
- washing cooling
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04775—Air purification and pre-cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
- F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
- F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being air
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Description
【発明の詳細な説明】
本発明は空気分離装置、特に、原料空気を水洗、冷却す
る段塔式水洗冷却塔を有する空気分離装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air separation apparatus, and particularly to an air separation apparatus having a plated column type water washing cooling tower for washing and cooling raw air.
一般に、段塔式水洗冷却塔を装備した空気分離装置にお
いては、第１図に示すように、原料空気はエアフィルタ
１で除塵された後、ニアコンプレッサ２により昇圧され
、水洗冷却塔６で水槽８からポンプ７にてその塔頂から
散布される冷却水により水洗、冷却された後、空気分離
装置の保冷箱１０内のりパージング熱交換器へ供給され
、水洗冷却塔６内を降下した冷却水は蒸発冷却塔９の頂
部へ供給され、そこで熱交換器からの廃ガスと熱交換し
て冷却され水槽８へ戻される。In general, in an air separation device equipped with a plate-type water washing cooling tower, as shown in FIG. After being washed and cooled by the cooling water sprayed from the top of the tower by the pump 7 from 8, the cooling water is supplied to the purging heat exchanger in the cold box 10 of the air separation device, and the cooling water that descends inside the washing cooling tower 6 is It is fed to the top of the evaporative cooling tower 9, where it is cooled by exchanging heat with the waste gas from the heat exchanger and returned to the water tank 8.
しかし、この種の空気分離装置の運転中に放風弁４が開
くと、水洗冷却塔６の原料空気入口圧力がその出口圧力
よりも低くなるため、昇圧された原料空気か水洗冷却塔
６内を逆流しようとするか、水洗冷却塔のトイレ５上に
ある水が急激なガスの流れの変化に追従できず、逆流し
ようとするガスに対してシールの働きをし、そのため圧
力の逆転後しばらくの間が不は流れずトイレ５に大きな
負荷がかかるという問題かあった。However, if the blow-off valve 4 is opened during operation of this type of air separation device, the feed air inlet pressure of the water washing cooling tower 6 becomes lower than its outlet pressure, so that the pressurized feed air flows into the water washing cooling tower 6. Either the water above the toilet 5 of the flush cooling tower cannot follow the sudden change in gas flow and acts as a seal against the gas that is trying to flow backwards, so that for some time after the pressure reverses. There was a problem that the toilet 5 was not flushed and a heavy load was placed on it.
このような問題を解決する手段として、（イ）放風弁４
を水洗冷却塔６の頂部から保冷箱１０に至る流路１２に
設ける方法、（→水洗冷却塔６の入口に逆止弁を設け、
原料空気放風時に原料空気か水洗冷却塔を逆流するのを
防ぐ方法、（ハ）ニアコンプレッサ２の出口にある逆止
弁３で（吻の方法における逆止弁を代用する方法、に）
放風弁を逆止弁３とコンプレッサ２の間に設ける方法な
どが考えられるか、次のような問題がある。As a means to solve such problems, (a) air discharge valve 4
A method of providing a flow path 12 from the top of the water washing cooling tower 6 to the cold storage box 10, (→ providing a check valve at the inlet of the washing cooling tower 6,
A method for preventing raw air from flowing backward through a water washing cooling tower when raw air is discharged; (c) Using a check valve 3 at the outlet of the near compressor 2 (a method of substituting the check valve in the proboscis method)
Is it possible to consider a method in which a blowoff valve is provided between the check valve 3 and the compressor 2?The following problems arise.
すなわち、（イ）の方法では、原料空気の放風時、蒸発
冷却塔にはガスが流れないため水洗冷却塔で原料空気と
の熱交換により加熱された冷却水を蒸発冷却塔で冷却す
ることができず、水洗冷却塔および蒸発冷却塔を循環す
る冷却水の温度が上昇し、放風ラインを閉じ原料空気を
空気分離装置の保冷箱に送る場合に、水洗冷却塔６を出
る原料空気の温度も上昇することになり、この高温の原
料空気か熱交換器に入って熱交換器に悪影響を及ぼす。In other words, in method (a), when raw air is discharged, gas does not flow to the evaporative cooling tower, so the cooling water heated by heat exchange with the raw air in the water washing cooling tower is cooled in the evaporative cooling tower. If the temperature of the cooling water circulating through the water washing cooling tower and the evaporative cooling tower increases and the air discharge line is closed and the raw air is sent to the cold box of the air separation device, the temperature of the raw air leaving the water washing cooling tower 6 will increase. The temperature will also rise, and this hot feed air will enter the heat exchanger and have an adverse effect on the heat exchanger.
また、（Ｄ）の方法では（イ）のような問題はないが、
大口径配管に逆止弁を設けなければならず、大幅なコス
トアップを招くと共に圧力損失が増大しランニングコス
トのアップを招く。Also, method (D) does not have the problem like (B), but
A check valve must be installed in the large-diameter piping, leading to a significant increase in cost and increased pressure loss, leading to an increase in running costs.
（ハ）の方法ではコンプレッサトリップ時にサージング
を起こす欠陥がある。Method (c) has a defect that causes surging when the compressor trips.
すなわち、般に、コンプレッサのトリップ時、出口側の
ガスが逆流するが、この逆流しようとするガスの体積が
ある値以上になるとコンプレッサがサージングを起こす
。That is, generally, when a compressor trips, gas on the outlet side flows backwards, but when the volume of the gas attempting to flow backwards exceeds a certain value, the compressor causes surging.
従って、逆止弁を水洗冷却塔入口に取付けた場合、コン
プレッサ単独運転のための流量計２０を設置する必要性
から配管長が必然的に大きくならざるを得ず、そのため
コンプレッサ出口から逆止弁までの配管体積、すなわち
、上記逆流しようとするガスの体積がサージングを起こ
す体積となり逆止弁の目的であるコンプレッサの保護と
いう役割を果せなくなる。Therefore, when a check valve is installed at the inlet of a water washing cooling tower, the length of the piping must be inevitably increased due to the necessity of installing a flow meter 20 for independent operation of the compressor. The volume of the piping up to this point, that is, the volume of the gas that is about to flow back, becomes the volume that causes surging, and the check valve no longer fulfills its role of protecting the compressor.
また、に）の方法では放風弁４が流量計２０の手前につ
くため、運転流量を計測できないことになり、従ってコ
ンプレッサの単独運転ができなくなる、などである。Furthermore, in method (2), the blowoff valve 4 is placed before the flow meter 20, so the operating flow rate cannot be measured, and therefore the compressor cannot be operated independently.
本発明は、上記問題を解決すべくなされたものであって
、原料空気の放風時、水洗冷却塔のトレイに大きな負荷
がかかるのを防止した空気分離装置を得ることを目的と
し、その要旨は、昇圧された原料空気を水洗冷却する段
塔式水洗冷却塔を有する空気分離装置において、水洗冷
却塔の原料空気入口側と原料空気出口側とを結ぶバイパ
ス流路を設け、該バイパス流路に前記水洗冷却塔の原料
空気入口側と出口側の圧力の逆転に対応して開閉する弁
を設けたことを特徴とする空気分離装置、にある。The present invention has been made to solve the above problems, and aims to provide an air separation device that prevents a large load from being applied to the tray of a water washing cooling tower when raw air is discharged. is an air separation device having a plated water-washing cooling tower that washes and cools pressurized raw material air, and is provided with a bypass passage connecting the raw air inlet side and the raw air outlet side of the water-washing cooling tower. The air separation device is characterized in that it is provided with a valve that opens and closes in response to the reversal of the pressures on the feed air inlet side and the outlet side of the water washing cooling tower.
以下、本発明の実施例を示す添付の図面を参照して本発
明を具体的に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, which illustrate embodiments of the present invention.
第２図に示す本発明に係る空気分離装置は、水洗冷却塔
６の原料空気入口側と原料空気出口側、すなわち、水洗
冷却塔６への原料空気出口側団１もしくは塔下部（最下
段トイレよりも下の部分）６ａと水洗冷却塔６からの原
料空気出口流路１２もしくは塔上部（最上段トイレより
も上の部分）６ｂとを結ぶバイパス流路１３が設けられ
ており、このバイパス流路１３には、原料空気入口側と
原料空気出口側の圧力の逆転に対応して開閉する弁１４
が配設されている。The air separation apparatus according to the present invention shown in FIG. A bypass flow path 13 is provided that connects the raw air outlet flow path 12 from the washing cooling tower 6 or the upper part of the tower (a portion above the top toilet) 6b, and this bypass flow The passage 13 includes a valve 14 that opens and closes in response to the reversal of the pressure on the raw air inlet side and the raw air outlet side.
is installed.
他の構成は第１図のものと実質的に同じである。The other configuration is substantially the same as that of FIG.
前記弁１４は、通常運転時（すなわち、水洗冷却塔下部
６ａの圧力が塔上部６ｂの圧力よりも高いとき）は閉じ
ており、放風時（すなわち、塔下部６ａの圧力が塔上部
６ｂの圧力よりも低くなり塔内部のトイレ５に逆圧がか
かったとき）には開いて、水洗冷却塔から空気分離装置
の保冷箱に至る流路１２中の原料空気をバイパス流路１
３を介して放風弁４から大気へ放出させるものである。The valve 14 is closed during normal operation (i.e., when the pressure in the lower part 6a of the water washing cooling tower is higher than the pressure in the upper part 6b), and is closed during air discharge (i.e., when the pressure in the lower part 6a of the tower is higher than the pressure in the upper part 6b). When the pressure becomes lower than the pressure and a back pressure is applied to the toilet 5 inside the tower, the air is opened and the raw air in the flow path 12 leading from the washing cooling tower to the cold storage box of the air separation device is transferred to the bypass flow path 1.
3 to the atmosphere from the air discharge valve 4.
従って、放風時、水洗冷却塔内を原料空気が逆流するこ
とがなく、トイレに大きな負荷がかかるのが防止される
。Therefore, when air is discharged, the raw air does not flow back inside the flush cooling tower, and a large load on the toilet is prevented.
この弁１４の形式としては、水封弁、逆止弁など種々の
ものを使用できるか、水封弁の場合、第３図に、示すよ
うに、バイパス流路１３の下部をＵ字状に彎曲させ、そ
の彎曲部の水洗冷却塔原料空気入口側の直径をその出口
側の直径より大きくすると共に、Ｕ字状彎曲部に水その
他の液体１５を入れ、通常運転時、水洗冷却塔６内にト
イレ５による圧力損失か液体１５の水洗冷却塔原料空気
入口側液面１５ａと出口側液面１５ｂにかかつてもそれ
につり合うだけの液面差が維持できるようにしておく。Various types of valve 14 can be used, such as a water seal valve and a check valve. In the case of a water seal valve, the lower part of the bypass passage 13 is shaped like a U, as shown in FIG. The diameter of the curved portion on the water-washing cooling tower feed air inlet side is made larger than the diameter on the outlet side, and water or other liquid 15 is placed in the U-shaped curved portion so that the inside of the water-washing cooling tower 6 during normal operation. In addition, the pressure loss due to the toilet 5 must be maintained so that a difference in liquid level can be maintained between the liquid level 15a on the water washing cooling tower feed air inlet side and the liquid level 15b on the outlet side of the flushing cooling tower.
従って、水洗冷却塔６のトレイ５による圧力損失によっ
て液面１５ａが第３図のＸの位置まで降下した時は、液
面差はその圧力損失の水頭よりも大きくなり水洗冷却塔
原料空気入口側の原料空気がバイパス流路１３を通って
出口側流路１２へ流入することがない。Therefore, when the liquid level 15a drops to the position X in Fig. 3 due to the pressure loss due to the tray 5 of the water washing cooling tower 6, the liquid level difference is larger than the head of the pressure loss, and the water washing cooling tower feed air inlet side The raw material air does not flow into the outlet side flow path 12 through the bypass flow path 13.
他方、放風弁４が開き水洗冷却塔６の入力側と出口側の
圧力が逆転すると、その圧力差により液面差を生じさせ
、この時、原料空気出口側液面１５ｂがＸの位置よりも
下がると、バイパス流路１３の配管の構造により水封が
こわれ、水洗冷却塔原料空気出口側の原料空気はバイパ
ス流路１３を通って放風弁４から放風される。On the other hand, when the blow-off valve 4 opens and the pressure on the input side and the outlet side of the water washing cooling tower 6 is reversed, the pressure difference causes a liquid level difference, and at this time, the liquid level 15b on the raw air outlet side is lower than the position X. When the water pressure decreases, the water seal is broken due to the piping structure of the bypass flow path 13, and the raw material air on the water washing cooling tower raw air outlet side passes through the bypass flow path 13 and is blown off from the air discharge valve 4.
従って、この水封弁を用いた場合、放風時トイレにかか
る逆圧はバイパス流路１２内の水洗冷却塔出口側液面１
５ｂが第３図のＸの位置になったときが最大となり、大
きな負荷がトレイにかかることはない。Therefore, when this water seal valve is used, the back pressure applied to the toilet when air is discharged is
The maximum load is reached when 5b is at the position X in FIG. 3, and no large load is applied to the tray.
また、逆止弁を用いる場合、第４図ａ、ｔ）に示す如き
簡単な構造のものでよい。Further, when a check valve is used, it may be of a simple structure as shown in Fig. 4 a, t).
これらの逆止弁は、通常運転時、水洗冷却塔６の原料空
気入口側と出口側との圧力差が弁のディスク２１にかか
る力とディスク２１の自重によってディスク２１が弁座
２２に押圧されて閉じており、放風時には、水洗冷却塔
６の原料空気入口側および出口側の圧力差がディスク２
１の自重に打ち勝って弁を開放する。During normal operation, these check valves press the disk 21 against the valve seat 22 due to the force exerted on the disk 21 of the valve due to the pressure difference between the feed air inlet side and the outlet side of the water washing cooling tower 6, and the weight of the disk 21. When the air is discharged, the pressure difference between the raw air inlet side and the outlet side of the water washing cooling tower 6 is reduced to the disk 2.
Overcoming the weight of step 1, the valve opens.
従って、この逆止弁のディスクは、放風時わずかな圧力
差でもその自重に打ち勝って弁を開くことができるよう
に軽いものがよい。Therefore, the disk of this check valve is preferably light so that it can overcome its own weight and open the valve even with a slight pressure difference when air is released.
この例では、弁が開くために必要な圧力差が水洗冷却塔
のトレイにかかる力である。In this example, the pressure difference required for the valve to open is the force exerted on the flush cooling tower tray.
以上の説明から明らかなように、本発明によれば水封弁
あるいは逆止弁などを配設したバイパス流路を付設する
ことに′より、低価格で水洗冷却塔のトイレを保護する
ことかでき、通常運転時、装置のランニングコストのア
ップをさけることができる。As is clear from the above description, according to the present invention, it is possible to protect toilets in flush cooling towers at low cost by providing a bypass flow path equipped with water seal valves or check valves. It is possible to avoid an increase in the running cost of the equipment during normal operation.
【図面の簡単な説明】
第１図は従来の空気分離装置の概略系統図、第２図は本
発明に係る空気分離装置の概略系統図、第３図はその要
部枳明図、第４図はその変形例を示す説明図である。
１・・・・・・エアフィルタ、２・・・・・・ニアコン
プレッサ、３・・・・・・逆止弁、４・・・・・・放風
弁、５・・・・・・トレイ、６・・・・・・水洗冷却塔
、９・・・・・・蒸発冷却塔、１０・・・・・・保冷箱
、１１・・・・・・水洗冷却塔原料空気入口側流路、１
２・・・・・・原料空気出口側流路、１３・・・・・・
バイパス流路、１４・・・・・・弁。[Brief Description of the Drawings] Fig. 1 is a schematic system diagram of a conventional air separation device, Fig. 2 is a schematic system diagram of an air separation device according to the present invention, Fig. 3 is a schematic diagram of its main parts, and Fig. 4 is a schematic diagram of the air separation device according to the present invention. The figure is an explanatory diagram showing a modification thereof. 1... Air filter, 2... Near compressor, 3... Check valve, 4... Air discharge valve, 5... Tray , 6... Water washing cooling tower, 9... Evaporative cooling tower, 10... Cold storage box, 11... Water washing cooling tower raw air inlet side channel, 1
2... Raw air outlet side flow path, 13...
Bypass flow path, 14... valve.
Claims (1)
塔６を有する空気分離装置において、水洗冷却塔６の原
料空気入口側と原料空気出口側とを結ぶバイパス流路１
３を設け、該バイパス流路１３に前記水洗冷却塔６の原
料空気入口側と出口側の圧力の逆転に対応して開閉する
弁１４を設けたことを特徴とする空気分離装置。 ２ 前記弁か水封弁である特許請求の範囲第１項記載の
空気分離装置。 ３ 前記弁が逆止弁である特許請求の範囲第１項記載の
空気分離装置。[Scope of Claims] 1. In an air separation device having a plated water washing cooling tower 6 that washes and cools pressurized raw material air, a bypass flow path connecting the raw material air inlet side and the raw material air outlet side of the water washing cooling tower 6 1
3, and the bypass flow path 13 is provided with a valve 14 that opens and closes in response to the reversal of the pressure on the feed air inlet side and the outlet side of the water washing cooling tower 6. 2. The air separation device according to claim 1, wherein the valve is a water seal valve. 3. The air separation device according to claim 1, wherein the valve is a check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3910081A JPS5828509B2 (en) | 1981-03-17 | 1981-03-17 | air separation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3910081A JPS5828509B2 (en) | 1981-03-17 | 1981-03-17 | air separation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57153186A JPS57153186A (en) | 1982-09-21 |
| JPS5828509B2 true JPS5828509B2 (en) | 1983-06-16 |
Family
ID=12543650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3910081A Expired JPS5828509B2 (en) | 1981-03-17 | 1981-03-17 | air separation equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5828509B2 (en) |
-
1981
- 1981-03-17 JP JP3910081A patent/JPS5828509B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57153186A (en) | 1982-09-21 |
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