JPH0321325A - Treatment of chlorofluorocarbon vapor - Google Patents

Treatment of chlorofluorocarbon vapor

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Publication number
JPH0321325A
JPH0321325A JP1152145A JP15214589A JPH0321325A JP H0321325 A JPH0321325 A JP H0321325A JP 1152145 A JP1152145 A JP 1152145A JP 15214589 A JP15214589 A JP 15214589A JP H0321325 A JPH0321325 A JP H0321325A
Authority
JP
Japan
Prior art keywords
fluorocarbon
storage tank
vapor
container
chlorofluorocarbon
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
JP1152145A
Other languages
Japanese (ja)
Inventor
Kunihiko Hiyama
火山 邦彦
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
Original Assignee
Mitsubishi Heavy Industries 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 filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP1152145A priority Critical patent/JPH0321325A/en
Publication of JPH0321325A publication Critical patent/JPH0321325A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To make chlorofluorocarbon(CFC) vapor harmless by recovering chlorofluorocarbon vapor and decomposing the chlorofluorocarbon vapor remaining in a storage system by the irradiation with ultraviolet rays to generate chlorine and stabilizing the chlorine as chloride. CONSTITUTION:After a solution of a chlorofluorocarbon(CFC) hydrate is transferred to a container 4 from a storage tank 1, the fluorocarbon vapor 5 in the storage tank 1 is sucked and compressed by a compressor 3 and cooled and liquefied by a condenser 6 to be recovered in a recovery container 7 as a chlorofluorocarbon liquid. When the pressure in the storage tank 1 is lowered to a level possible to suck by the compressor 6, the respective valves around the storage tank 1 are closed. Then, the fluorine gas from a fluorine gas container 10 is injected in the storage tank 1 and irradiated with ultraviolet rays by the ultraviolet irradiator 8 provided in the storage tank 1 to liberate chlorine from the chlorofluorocarbon vapor remaining in the storage tank 1. Next, ozone is supplied into the storage tank 1 from an ozone gas container 9 to bring ozone gas into contact with the gas containing the above mentioned free chlorine and the gas is stabilized as ClO.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は,フロン水和物利用蓄冷装置,フロン液の貯槽
・関連配管系等の貯蔵系に存在するフロン蒸気を無害化
する方法に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for rendering harmless fluorocarbon vapor present in a storage system such as a cold storage device using fluorocarbon hydrate, a fluorocarbon liquid storage tank, and related piping systems.

〔従来の技術〕[Conventional technology]

フロン液を貯蔵容器から他の容器へ移送する際には、容
器内でフロン蒸気が発生する。
When a fluorocarbon liquid is transferred from a storage container to another container, fluorocarbon vapor is generated within the container.

大規模たフロン液取扱い工場等においては,第3図に示
すように,フロン容器03かもポンプO2により貯槽O
lに移す場合,貯槽01内の液位上昇により貯槽01内
の空間部のフロン蒸気08は管06を通して別容器04
に移すか,連絡配管05によって元の容器03に戻され
る。このようにして,フロン蒸気の回収が行なわれてい
る。
In large-scale plants that handle fluorocarbon liquid, as shown in Figure 3, the fluorocarbon container 03 is also pumped into the storage tank by pump O2.
1, due to the rise in the liquid level in the storage tank 01, the fluorocarbon vapor 08 in the space inside the storage tank 01 is transferred to another container 04 through the pipe 06.
or returned to the original container 03 via the connecting pipe 05. In this way, fluorocarbon vapor is recovered.

また,小量の蒸気の場合は貯槽01内のフロン蒸気を管
07を通して直接大気中に放散させてしまう場合も有り
得る。
Furthermore, in the case of a small amount of steam, there is a possibility that the fluorocarbon vapor in the storage tank 01 is directly dissipated into the atmosphere through the pipe 07.

一方,フロン液を需要地にあるフロン貯槽011に移し
代える場合は,@4図に示すように,フロン輸送車01
3内のフロン液をポンプ016によって貯槽011へ送
り,配管012により貯槽011内のフロン蒸気014
ヲフロン輸送車013へ戻す。フロン輸送車013内の
フロン蒸気015は液化装置に導入され圧縮液化され,
残りは大気放出される。
On the other hand, when transferring the fluorocarbon liquid to the fluorocarbon storage tank 011 located at the demand location, as shown in Figure @4, the fluorocarbon transport vehicle 01
The fluorocarbon liquid in 3 is sent to the storage tank 011 by the pump 016, and the fluorocarbon vapor 014 in the storage tank 011 is sent through the piping 012.
Return to Wofron transport vehicle 013. The fluorocarbon vapor 015 in the fluorocarbon transport vehicle 013 is introduced into a liquefaction device and compressed and liquefied.
The rest is released into the atmosphere.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記第3図に示す方法にあっては、フロン液容器03と
フロン液貯槽01を連絡配管05で結ぶことにより,フ
ロン蒸気08を外部に出すことなく移すことができ,容
器03内のフロン蒸気は,圧縮・冷却液化することによ
り,圧縮機で吸入可能な圧力(負圧)相当分は回収する
ことができる。
In the method shown in FIG. 3 above, by connecting the fluorocarbon liquid container 03 and the fluorocarbon liquid storage tank 01 with the connecting pipe 05, the fluorocarbon vapor 08 can be transferred without being discharged to the outside, and the fluorocarbon vapor in the container 03 can be transferred. By compressing, cooling, and liquefying it, the amount of pressure (negative pressure) that can be sucked into the compressor can be recovered.

しかし、このフロン回収後容器03内に残存する蒸気は
空気等を送り結果的に大気中に希釈拡散させることにな
る。また,圧縮・冷却液化による回収を行なわない場合
は,空気を容器03内へ送り、フロン蒸気と置換するこ
とにたる。
However, the steam remaining in the container 03 after the Freon recovery sends air and the like, resulting in dilution and diffusion into the atmosphere. Furthermore, if recovery by compression/cooling and liquefaction is not performed, air is sent into the container 03 to be replaced with fluorocarbon vapor.

更に、上記第4図に示される方法にあっては、フロン輸
送車013内へ貯槽011から移されたフロン蒸気は、
液化されるが,残りは大気放出される.以上説明したよ
うに,従来のフロン蒸気の処置方法では,フロン貯槽内
での発生蒸気をフロン液容器,フロン輸送車又は別容器
に戻すか.あるいは大気放出とするかいずれかであり,
また容器等に戻された蒸気も完全には回収されず,その
一部が大気に放出されるという欠点がある。
Furthermore, in the method shown in FIG. 4, the fluorocarbon vapor transferred from the storage tank 011 into the fluorocarbon transport vehicle 013 is
It is liquefied, but the rest is released into the atmosphere. As explained above, in the conventional treatment method for fluorocarbon vapor, it is necessary to return the vapor generated in the fluorocarbon storage tank to the fluorocarbon liquid container, fluorocarbon transport vehicle, or another container. Or it can be released into the atmosphere.
Another disadvantage is that the steam returned to the container etc. is not completely recovered and a portion of it is released into the atmosphere.

本発明は,フロン蒸気を大気放出する従来のフロン蒸気
の処理方法の欠点を解消し,フロン蒸気を無害化する方
法を提供しようとするものである。
The present invention aims to eliminate the drawbacks of conventional methods for treating fluorocarbon vapor that release the fluorocarbon vapor into the atmosphere, and to provide a method for rendering fluorocarbon vapor harmless.

〔課題を解決するための手段〕[Means to solve the problem]

本発明のフロン蒸気の処理方法は,フロン液又はフロン
水和物液の貯槽、配管等の貯蔵系内に存在するフロン蒸
気を回収し、回収後貯蔵系内に残存するフロン蒸気に紫
外線を照射してフロン蒸気を分解して塩素を遊離させ,
この塩素を塩素化物として安定化させる。
The fluorocarbon vapor treatment method of the present invention collects fluorocarbon vapor present in a storage system such as a storage tank or piping for a fluorocarbon liquid or fluorocarbon hydrate liquid, and irradiates ultraviolet rays to the fluorocarbon vapor remaining in the storage system after recovery. to decompose the fluorocarbon vapor and liberate chlorine,
This chlorine is stabilized as a chloride.

〔作 用〕[For production]

本発明では、フロン液又はフロン水和物液の貯蔵系内に
ある大部分のフロン蒸気が回収される。
In the present invention, most of the fluorocarbon vapor in the fluorocarbon liquid or fluorocarbon hydrate storage system is recovered.

この回収後に同貯蔵系内に残存するフロン蒸気に紫外線
が照射される.これによってフロン分子は光分解されて
Cl原子を遊離する。
After this recovery, the fluorocarbon vapor remaining in the storage system is irradiated with ultraviolet light. As a result, Freon molecules are photolyzed to liberate Cl atoms.

例えば、次のようにフロン分子が分解されてCl原子が
遊離される。
For example, fluorocarbon molecules are decomposed and Cl atoms are liberated as follows.

CF2Cl2→OF4+2CI OF Cl−+OF4 + cl 2 このCl原子は,オゾン、水素,木炭と水蒸気,ベンゼ
ン,石灰乳等に反応させ塩素化物として安定化される。
CF2Cl2→OF4+2CI OF Cl-+OF4 + cl2 This Cl atom is stabilized as a chloride by reacting with ozone, hydrogen, charcoal and steam, benzene, milk of lime, etc.

例えば,オゾン03 と反応すると, Cl+0 →CIO+O2 3 となる。For example, when reacting with ozone 03, Cl+0 → CIO+O2 3 becomes.

また水素又は木炭と水蒸気と反応すると,HOIとなり
,ベンゼン(C,H6)と反応するとモノクロベンゾー
ル(C6H5Cl)とHClとなり,石灰乳と反応する
とサラン粉(Ga((lO)2)を作る。
Also, when it reacts with hydrogen or charcoal and steam, it becomes HOI, when it reacts with benzene (C, H6), it becomes monochlorobenzole (C6H5Cl) and HCl, and when it reacts with milk of lime, it produces saran powder (Ga((lO)2).

このように.本発明では、フロン蒸気を回収した後に貯
檀,配管等の貯蔵系内に残存するフロン蒸気に紫外線を
照射して遊離塩素を発生させ,これな塩素化物として安
定化させることによって、従来空気に放散されていたフ
ロン蒸気を無害化し、環境問題(オゾン層破壊)の発生
が避けられる。
in this way. In the present invention, after the fluorocarbon vapor is recovered, the fluorocarbon vapor remaining in the storage system such as a basin or piping is irradiated with ultraviolet rays to generate free chlorine, which is stabilized as a chlorinated product. This makes the emitted CFC vapor harmless and prevents environmental problems (ozone layer depletion).

〔実施例〕〔Example〕

本発明の第一の実施例を第1図によって説明する。 A first embodiment of the present invention will be described with reference to FIG.

1はフロン水和物の蓄冷貯檜であって,同槽1内の冷フ
ロン水和物は,フロン水和物ボンプl4によって冷熱媒
体として図示したい空調ファンユニット等に送られ,フ
ロン水和物は水利熱をとられて水とフロンに分解して蓄
冷貯槽1へ戻るようになっている。
Reference numeral 1 denotes a cold storage tank for fluorocarbon hydrate, and the cold fluorocarbon hydrate in the tank 1 is sent to the air conditioning fan unit shown in the figure as a cooling medium by a fluorocarbon hydrate pump 14, and the fluorocarbon hydrate is The water is decomposed into water and chlorofluorocarbons, and then returned to the cold storage tank 1.

また,蓄冷貯槽1内のフロン蒸気は、管路18を経て,
又はフロン蒸気圧が低いときにはブロヮl5をもつ管路
19を経て,フロン圧縮機3で圧縮され凝縮器で冷却液
化された上,減圧弁13を経て蓄冷貯槽1内に噴射され
て潜熱によりフロン水和物を作り,又は熱交換器17へ
導入されて蓄冷貯11内を冷却してフロン水和物を作る
ようになっている。
In addition, the fluorocarbon vapor in the cold storage tank 1 passes through the pipe 18,
Alternatively, when the fluorocarbon vapor pressure is low, the fluorocarbon water passes through the pipe 19 with the blower 15, is compressed by the fluorocarbon compressor 3, is cooled and liquefied by the condenser, is injected into the cold storage tank 1 via the pressure reducing valve 13, and is converted into water by latent heat. The chlorofluorocarbon hydrate is then introduced into the heat exchanger 17 to cool the inside of the cold storage 11 to produce a fluorocarbon hydrate.

本実施例において,フロン水和物の回収に当っては,フ
ロン水和物の蓄冷貯槽1からフロン水和物液をポンプ2
により輸送車の容器4へ移送する。
In this embodiment, when recovering fluorocarbon hydrate, the fluorocarbon hydrate liquid is pumped from the fluorocarbon hydrate cold storage tank 1 to the pump 2.
The liquid is then transferred to the container 4 of the transport vehicle.

輸送車の容器4のベントノズル11と貯槽1のベントノ
ズル12間をホース等により接続し輸送車4内のフロン
蒸気な貯檜1に戻すことにより閉回路が形威される。
A closed circuit is formed by connecting the vent nozzle 11 of the container 4 of the transportation vehicle and the vent nozzle 12 of the storage tank 1 with a hose or the like and returning the fluorocarbon vapor to the storage tank 1 in the transportation vehicle 4.

フロン水化物の液の移送が終了すると,圧縮機3により
貯槽1内のフロン蒸気5を吸引圧縮し,凝縮器6により
冷却液化せしめてフロン液として回収容器7K回収する
。貯槽内が圧縮機3の吸弓可能な圧力まで下ると、貯槽
1の廻りの各弁を閉じる。その上で.貯槽1内にフッ素
ガス容器10かものフッ素ガスを注入し,貯槽1内に設
けられた紫外線照射器8によって紫外線を照射し.同貯
蔵1内に残存したフロン蒸気より塩素(CI)を遊離さ
せる。ついで,オゾンガス容器9から貯槽1内へオゾン
を供給して,オゾンガスと上記遊離塩素を含むガスを接
触させ,遊離した塩素をCIOとして安定化させる。
When the transfer of the fluorocarbon hydrate liquid is completed, the fluorocarbon vapor 5 in the storage tank 1 is sucked and compressed by the compressor 3, cooled and liquefied by the condenser 6, and collected as a fluorocarbon liquid in the recovery container 7K. When the pressure inside the storage tank drops to a level that allows the compressor 3 to draw its bow, each valve around the storage tank 1 is closed. Moreover. Fluorine gas from 10 fluorine gas containers is injected into the storage tank 1, and ultraviolet rays are irradiated by the ultraviolet irradiator 8 provided in the storage tank 1. Chlorine (CI) is liberated from the fluorocarbon vapor remaining in the storage 1. Next, ozone is supplied from the ozone gas container 9 into the storage tank 1, and the ozone gas and the gas containing free chlorine are brought into contact with each other, and the free chlorine is stabilized as CIO.

このようにして,閉回路において紫外線の照射にようて
フロン蒸気から塩素を発生させ,これをオゾンに接触さ
せてClOとすることにより、安定化させることができ
,これによって,フロン蒸気を、系外に排出してもオゾ
ン層破壊を発生しない無害のガスに変換することができ
る. 本発明の第二の実施例を第2図によって説明する。
In this way, chlorine can be generated from fluorocarbon vapor by irradiation with ultraviolet rays in a closed circuit, and it can be stabilized by contacting it with ozone and converting it into ClO. It can be converted into a harmless gas that does not cause ozone layer depletion even if discharged outside. A second embodiment of the present invention will be explained with reference to FIG.

フロン貯槽1′内のフロン液を.ポンプ2によってフロ
ン輸送車の容器4に移送する。容器4から発生するフロ
ン蒸気は,管路加を経て貯槽l′内ヘ戻される。フロン
液の移送終了後貯槽1′内の残留フロン蒸気5を圧縮機
3にて吸引圧縮し,冷却器6によって圧縮蒸気を冷却液
化し,回収容器7K回収する。フロン貯4%Il内のフ
ロン蒸気圧が圧縮機3の吸引可能な圧力まで下ると,貯
槽1′内へフッ素ガス容器10からフッ素を供給し,フ
ッ素ガスとフロン蒸気の混合ガスをプロワ21で吸引し
て貯槽1′外に設けられた紫外線照射器8′へ導き,同
紫外線照射器8′により紫外線を照射せしめ,フッ素ガ
ス雰囲気下でフロンガスから遊離塩素を発生させる。こ
のガスを紫外線照射器8′から,オゾンガス容器9から
のオゾンガス(03)が供給される反応器加へ供給し.
上配の遊離塩素を反応器加内でオゾンと反応させて安定
化する。
Freon liquid in Freon storage tank 1'. The fluorocarbons are transferred by the pump 2 to the container 4 of the fluorocarbon transport vehicle. The fluorocarbon vapor generated from the container 4 is returned to the storage tank l' through a pipe. After the transfer of the fluorocarbon liquid is completed, the residual fluorocarbon vapor 5 in the storage tank 1' is sucked and compressed by the compressor 3, and the compressed vapor is cooled and liquefied by the cooler 6, and collected in the recovery container 7K. When the fluorocarbon vapor pressure in the 4% Il fluorocarbon storage falls to a pressure that can be sucked into the compressor 3, fluorine is supplied from the fluorine gas container 10 into the storage tank 1', and a mixed gas of fluorine gas and fluorocarbon vapor is produced by the blower 21. It is sucked and guided to an ultraviolet irradiator 8' provided outside the storage tank 1', where it irradiates ultraviolet rays to generate free chlorine from the fluorocarbon gas in a fluorine gas atmosphere. This gas is supplied from the ultraviolet irradiator 8' to the reactor, which is supplied with ozone gas (03) from the ozone gas container 9.
The upper free chlorine is stabilized by reacting with ozone in the reactor.

本実施例は,フロン貯槽1′を大気開放する時、フロン
ガス蒸気5を大気に放出することなく閉回路系にてフロ
ンガスの回収及び無害化が可能である. 〔発明の効果〕 本発明は,以上説明したように,フロン液貯槽容器又は
フロン水利物貯槽容器およびこれらの関連配管等のフロ
ン又はフロン水和物の貯蔵系内からフロン蒸気を回収し
,回収後貯蔵系内に残存するフロン蒸気に紫外線を照射
して分解して塩素を発生させ,これを塩素化物として安
定化させることによって,大部分のフロン蒸気を回収す
ると共に,従来大気に放出されていたフロン蒸気を無害
化することができ,環境汚染を防止することができる。
In this embodiment, when the Freon storage tank 1' is opened to the atmosphere, it is possible to recover and detoxify the Freon gas in a closed circuit system without releasing the Freon gas vapor 5 to the atmosphere. [Effects of the Invention] As explained above, the present invention recovers and recovers fluorocarbon vapor from the storage system of fluorocarbons or fluorocarbon hydrates, such as fluorocarbon liquid storage containers, fluorocarbon water storage containers, and related piping. By irradiating the fluorocarbon vapor remaining in the post-storage system with ultraviolet rays to decompose it and generate chlorine, which is stabilized as a chloride, most of the fluorocarbon vapor can be recovered and removed from the atmosphere that was previously released into the atmosphere. This makes it possible to make the fluorocarbon vapor harmless and prevent environmental pollution.

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

第1図は本発明の第一の実施例の系統図,第2図は本発
明の第二の実施例の系統図,@3図は従来のフロンガス
回収の系統図、第4図は従来のフロン輸送車を使用する
場合のフロンガス回収の系統図。 1・・・フロン水和物蓄冷貯槽, 叶梶′ 1′・・・フロン斧器.    2・・・ポンフ,3・
・・フロン圧縮機,  4・・・フロン輸送車の容器,
5・・・フロン蒸気,   6・・・凝縮器,7..,
フロン回収容器,8.8’・・・紫外線照射器,9・・
・オゾンガス容器, 加・・・反応器 10・・・フッ素ガス容器,
Figure 1 is a system diagram of the first embodiment of the present invention, Figure 2 is a system diagram of the second embodiment of the present invention, Figure @3 is a system diagram of conventional fluorocarbon gas recovery, and Figure 4 is a system diagram of conventional fluorocarbon gas recovery. System diagram of fluorocarbon gas recovery when using a fluorocarbon transport vehicle. 1...Freon hydrate cold storage tank, Kano Kaji'1'...Freon ax device. 2... Ponfu, 3.
...Freon compressor, 4...Container of Freon transport vehicle,
5... Freon vapor, 6... Condenser, 7. .. ,
Freon collection container, 8.8'...Ultraviolet irradiator, 9...
・Ozone gas container, addition...reactor 10...fluorine gas container,

Claims (1)

【特許請求の範囲】[Claims] フロン液又はフロン水和物液の貯蔵系内に存在するフロ
ン蒸気を回収し、フロン蒸気の回収後貯蔵系内に残存す
るフロン蒸気に紫外線を照射してフロン蒸気を分解して
塩素を遊離させ、この塩素を塩素化物として安定化させ
ることを特徴とするフロン蒸気の処理方法。
The fluorocarbon vapor present in the storage system of the fluorocarbon liquid or fluorocarbon hydrate liquid is recovered, and after the recovery of the fluorocarbon vapor, the fluorocarbon vapor remaining in the storage system is irradiated with ultraviolet rays to decompose the fluorocarbon vapor and liberate chlorine. A method for treating fluorocarbon vapor, which is characterized by stabilizing this chlorine as a chlorinated product.
JP1152145A 1989-06-16 1989-06-16 Treatment of chlorofluorocarbon vapor Pending JPH0321325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1152145A JPH0321325A (en) 1989-06-16 1989-06-16 Treatment of chlorofluorocarbon vapor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1152145A JPH0321325A (en) 1989-06-16 1989-06-16 Treatment of chlorofluorocarbon vapor

Publications (1)

Publication Number Publication Date
JPH0321325A true JPH0321325A (en) 1991-01-30

Family

ID=15534021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1152145A Pending JPH0321325A (en) 1989-06-16 1989-06-16 Treatment of chlorofluorocarbon vapor

Country Status (1)

Country Link
JP (1) JPH0321325A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05277205A (en) * 1991-11-21 1993-10-26 Tokyo Electric Power Co Inc:The Method and device for continuously decomposing and separating chlorofluorocarbons
US6277347B1 (en) * 1997-02-24 2001-08-21 Applied Materials, Inc. Use of ozone in process effluent abatement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05277205A (en) * 1991-11-21 1993-10-26 Tokyo Electric Power Co Inc:The Method and device for continuously decomposing and separating chlorofluorocarbons
US6277347B1 (en) * 1997-02-24 2001-08-21 Applied Materials, Inc. Use of ozone in process effluent abatement

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