JPH0724249A - Method for recovering organic solvent gas - Google Patents

Method for recovering organic solvent gas

Info

Publication number
JPH0724249A
JPH0724249A JP5173157A JP17315793A JPH0724249A JP H0724249 A JPH0724249 A JP H0724249A JP 5173157 A JP5173157 A JP 5173157A JP 17315793 A JP17315793 A JP 17315793A JP H0724249 A JPH0724249 A JP H0724249A
Authority
JP
Japan
Prior art keywords
organic solvent
gas
activated carbon
desorption
recovered
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.)
Withdrawn
Application number
JP5173157A
Other languages
Japanese (ja)
Inventor
Masahiko Furukawa
昌彦 古川
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP5173157A priority Critical patent/JPH0724249A/en
Publication of JPH0724249A publication Critical patent/JPH0724249A/en
Withdrawn legal-status Critical Current

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  • Separation Of Gases By Adsorption (AREA)

Abstract

PURPOSE:To obtain recovered solvent of high quality without requiring a large- scale ancillary facility, such as neutralizing and purifying equipment, to decrease the maintenance cost required for the recovery of organic solvent gas and to prevent the formation of secondary impurities due to the neutralization treatment of the recovered solvent. CONSTITUTION:When raw gas contg. organic solvent gas 102 is fed to an adsorber 16 provided with active carbon 16a, an amine base organic solvent is added to the organic solvent gas. Since the amine base organic solvent is a weak base, it acts as a stabilizer for organic solvent. In such a way, the organic solvent is decomposed by catalytic action of desorption gas 104 and the active carbon 16b to form impurities, such as organic acid, inorganic acid and peroxide is suppressed to a minimum. Further, since the desorption gas 104 fed to the adsorber 14 carries the amine base organic solvent, it becomes alkaline, the desorption of the organic solvent from the active carbon 16b is promoted. The amine base organic solvent is not saponified with the organic solvent and secondary impurities are not formed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、活性炭を備えた吸着装
置を用いて被処理ガス中の有機溶剤ガスを回収する有機
溶剤ガス回収方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic solvent gas recovery method for recovering an organic solvent gas in a gas to be treated using an adsorption device equipped with activated carbon.

【0002】[0002]

【従来の技術】磁気テープ、乾式製膜、乾式紡糸、塗料
などの製造工程においては、作業環境上好ましくない有
機溶剤ガスが発生する。また、ドライ・クリーニング、
金属脱脂洗浄などで有機溶剤を使用した場合にも有機溶
剤ガスが発生する。このため従来より、活性炭を用いて
有機溶剤ガスを吸着する、いわゆる活性炭吸着法による
有機溶剤ガスの回収が行われている。
2. Description of the Related Art In the manufacturing process of magnetic tapes, dry film forming, dry spinning, paints, etc., organic solvent gas which is not preferable in the working environment is generated. Also, dry cleaning,
Organic solvent gas is also generated when an organic solvent is used for metal degreasing and cleaning. For this reason, conventionally, the organic solvent gas is recovered by a so-called activated carbon adsorption method in which the organic solvent gas is adsorbed by using the activated carbon.

【0003】この活性炭吸着法は、例えば図3に示すよ
うに、製品生産工程等において発生した有機溶剤ガスを
含んだ処理すべき原ガス(被処理ガス)102を原ガス
送風ファン12で増圧して吸着装置14の活性炭(活性
炭層)16a、16bを有した2つの活性炭収納室14
a、14bの一方(この場合14a)に供給して吸着さ
せる。この活性炭収納室14aで原ガス102中の有機
溶剤を活性炭16aに吸着させ、この吸着処理後の原ガ
スを大気中に放出する。
In this activated carbon adsorption method, for example, as shown in FIG. 3, a raw gas (processing gas) 102 containing an organic solvent gas generated in a product production process or the like to be treated is pressurized by a raw gas blowing fan 12. Two activated carbon storage chambers 14 having activated carbon (activated carbon layers) 16a and 16b of the adsorption device 14
It is supplied to one of a and 14b (in this case, 14a) to be adsorbed. The organic solvent in the raw gas 102 is adsorbed by the activated carbon 16a in the activated carbon storage chamber 14a, and the raw gas after the adsorption treatment is released into the atmosphere.

【0004】上記2つの活性炭収納室14a、14bを
設けるのは、吸着装置14において上記吸着工程を絶え
間なく交互に行えるようにするためである。すなわち、
活性炭収納室14aでの吸着工程の間に、もう一方の活
性炭収納室14bの活性炭16bに既に吸着された有機
溶剤を該活性炭16bから除去するのであるが(以下、
本明細書中においては単に「脱離」という。)、このと
き活性炭16bを直接あるいは間接的に加熱するととも
に、活性炭収納室14b内に蒸気・窒素ガス・空気など
の脱離用ガス(キャリアガス)104を導入し、該脱離
用ガス104によって活性炭16bに付着している有機
溶剤を脱離するとともに吸着装置14外に取り出す。そ
の後、取り出された脱離用ガス104は、配管18を介
して送り出され、例えば冷却水106等を用いた凝縮冷
却器20にて冷却して凝縮液化した後、配管22(点線
にて示す)を介して貯液槽(デカンタ)24に送り込ま
れて有機溶剤相と水相に分離され、送液ポンプ26およ
び28により廃液水108および回収有機溶剤110を
取り出す。なお、吸着装置14の2つの活性炭収納室1
4aと14bとの使い分けは、配管系に設置された複数
の弁30a、30b、32a、32b、34a、34
b、36a、36bの適宜操作により行われる。また、
図中における上記各弁の開状態は白ぬきにして示し、閉
状態の表示は黒塗りにして示してある。
The two activated carbon storage chambers 14a and 14b are provided so that the adsorption process can be continuously and alternately performed in the adsorption device 14. That is,
During the adsorption step in the activated carbon storage chamber 14a, the organic solvent already adsorbed by the activated carbon 16b in the other activated carbon storage chamber 14b is removed from the activated carbon 16b (hereinafter,
In the present specification, this is simply referred to as "desorption". ), At this time, the activated carbon 16b is directly or indirectly heated, and a desorption gas (carrier gas) 104 such as steam, nitrogen gas, or air is introduced into the activated carbon storage chamber 14b, and the desorption gas 104 is used. The organic solvent attached to the activated carbon 16b is desorbed and taken out of the adsorption device 14. After that, the desorbed gas 104 that has been taken out is sent out through the pipe 18, and is cooled and condensed and liquefied by the condensing cooler 20 using, for example, the cooling water 106, and then the pipe 22 (shown by a dotted line). Is sent to a liquid storage tank (decanter) 24 through the separator and separated into an organic solvent phase and an aqueous phase, and the liquid sending pumps 26 and 28 take out the waste liquid water 108 and the recovered organic solvent 110. The two activated carbon storage chambers 1 of the adsorption device 14
The valves 4a and 14b are properly used by selecting a plurality of valves 30a, 30b, 32a, 32b, 34a, 34 installed in the piping system.
b, 36a, 36b are appropriately operated. Also,
In the figure, the open state of each valve is shown in white and the closed state is shown in black.

【0005】上述したような回収の際、通常、脱離用ガ
ス104の凝縮液には、活性炭の触媒作用や有機溶剤独
自の性質により生成される有機酸、無機酸、過酸化物等
の不純物が含まれているため、回収溶剤の品質悪化等を
招いていた。
At the time of recovery as described above, the condensate of the desorption gas 104 usually contains impurities such as organic acids, inorganic acids and peroxides generated by the catalytic action of activated carbon and the unique properties of organic solvents. Therefore, the quality of the recovered solvent is deteriorated.

【0006】そこで従来技術では、配管38(実線で示
す)を介して脱離用ガス104の凝縮液を撹拌機付タン
ク40、アルカリ水タンク42等で構成される中和・精
製装置44に一旦送り込み、撹拌機付タンク40内にお
いて、アルカリ水タンク42で希釈した水酸化ナトリウ
ム水溶液を撹拌機付タンク40のpHを測定しつつ適量
添加して、適宜攪拌することにより上記凝縮液の中和・
安定化処理を行ってから貯液槽24に送り込んでいた。
そして、このようにして適宜処理され品質が向上した液
を、貯液槽24にて水相と有機溶剤相とに分離して取り
出し、放流ならびに再使用を行うようにしていた。
Therefore, in the prior art, the condensate of the desorption gas 104 is once passed through a pipe 38 (shown by a solid line) to a neutralization / purification device 44 composed of a tank 40 with a stirrer, an alkaline water tank 42 and the like. In the tank 40 with the stirrer fed, an appropriate amount of sodium hydroxide aqueous solution diluted with the alkaline water tank 42 is added while measuring the pH of the tank 40 with the stirrer, and the mixture is neutralized by stirring appropriately.
It was sent to the liquid storage tank 24 after the stabilization process was performed.
Then, the liquid thus properly treated and improved in quality is separated into the water phase and the organic solvent phase in the liquid storage tank 24, taken out, and discharged and reused.

【0007】[0007]

【発明が解決しようとする課題】しかしながら、上記従
来の有機溶剤ガス回収方法においては、活性炭を備えた
吸着装置14以外にも、中和・精製装置44等の大掛か
りな付帯処理設備を必要とするため、その維持管理に多
大な費用が掛かってしまう、という問題があった。
However, the above conventional organic solvent gas recovery method requires large-scale incidental treatment equipment such as a neutralization / purification device 44 in addition to the adsorption device 14 equipped with activated carbon. Therefore, there has been a problem that the maintenance and management thereof requires a great deal of cost.

【0008】また、有機溶剤によっては、水酸化ナトリ
ウム等のような強塩基物と加水分解する、いわゆるケン
化反応を生じて2次不純物を生成するため、この2次不
純物を処理するための設備がさらに必要となる、という
問題があった。
[0008] Further, depending on the organic solvent, a so-called saponification reaction that hydrolyzes with a strong base such as sodium hydroxide or the like occurs to generate a secondary impurity, and therefore, a facility for treating the secondary impurity. There was a problem that was needed further.

【0009】本発明は、上記事情に鑑みてなされたもの
で、中和・精製装置等の大掛かりな付帯処理設備を必要
とせずに高品質の回収溶剤を得ることができ、有機溶剤
ガス回収に要する維持管理費の低減が図れ、しかも、回
収溶剤の中和処理による2次不純物も生成することのな
い有機溶剤ガス回収方法を提供することを目的とするも
のである。
The present invention has been made in view of the above circumstances, and it is possible to obtain a high-quality recovered solvent without the need for large-scale incidental treatment equipment such as a neutralization / purification device, and to recover an organic solvent gas. It is an object of the present invention to provide a method for recovering an organic solvent gas that can reduce the required maintenance cost and that does not generate secondary impurities due to the neutralization treatment of the recovered solvent.

【0010】[0010]

【課題を解決するための手段】本発明に係る有機溶剤ガ
ス回収方法は、吸着装置に有機溶剤ガスを含む被処理ガ
スを供給する際、該被処理ガスに弱塩基物を添加するこ
とにより、上記目的達成をはかるようにしたものであ
る。
The method for recovering an organic solvent gas according to the present invention, when a gas to be treated containing an organic solvent gas is supplied to an adsorption device, by adding a weak base to the gas to be treated, The above-mentioned purpose is achieved.

【0011】すなわち、活性炭を備えた吸着装置に有機
溶剤ガスを含む被処理ガスを供給して前記有機溶剤ガス
を前記活性炭に吸着させ、その後、前記吸着装置に脱離
用ガスを供給して前記活性炭に吸着された前記有機溶剤
を脱離させ、この脱離した有機溶剤を含有する前記脱離
用ガスを液化しさらに有機溶剤相と水相とに分離するこ
とにより、前記被処理ガス中の前記有機溶剤ガスを回収
する有機溶剤ガス回収方法において、前記吸着装置に前
記被処理ガスを供給する際、該被処理ガスに弱塩基物を
添加する、ことを特徴とするものである。
That is, a gas to be treated containing an organic solvent gas is supplied to an adsorption device equipped with activated carbon so that the organic solvent gas is adsorbed by the activated carbon, and then a desorption gas is supplied to the adsorption device. The organic solvent adsorbed on the activated carbon is desorbed, the desorption gas containing the desorbed organic solvent is liquefied and further separated into an organic solvent phase and an aqueous phase, thereby In the organic solvent gas recovery method for recovering the organic solvent gas, a weak base substance is added to the gas to be treated when the gas to be treated is supplied to the adsorption device.

【0012】上記「弱塩基物」は、無機物でも有機物で
もよく、また液体でも気体でもよく、例えば、アンモニ
アあるいはアンモニアガス、アミン系有機溶剤等が採用
可能である。
The above-mentioned "weak base substance" may be an inorganic substance or an organic substance, and may be a liquid or a gas. For example, ammonia or ammonia gas, an amine-based organic solvent and the like can be adopted.

【0013】[0013]

【発明の作用および効果】上記構成に示すように、吸着
装置に有機溶剤ガスを含む被処理ガスを供給する際、該
被処理ガスに弱塩基物を添加するようになっているの
で、この弱塩基物が被処理ガス中の有機溶剤の安定剤と
して作用し、これにより、有機溶剤が脱離用ガス(脱離
用ガス)および活性炭の触媒作用により分解して有機
酸、無機酸、過酸化物等の不純物を生成するのを最小限
に抑えることができる。また、吸着装置に供給された脱
離用ガスに上記弱塩基物が同伴されるため該脱離用ガス
はアルカリ性となり、このアルカリ性脱離用ガスによ
り、活性炭からの有機溶剤の脱離を促進することができ
る。
As described above, the weak base substance is added to the gas to be treated when the gas to be treated containing the organic solvent gas is supplied to the adsorption device. The basic substance acts as a stabilizer for the organic solvent in the gas to be treated, and as a result, the organic solvent is decomposed by the catalytic action of the desorbing gas (desorbing gas) and activated carbon to decompose organic acids, inorganic acids, and peroxides. It is possible to minimize the generation of impurities such as things. Further, since the desorption gas supplied to the adsorption device is accompanied by the weak base substance, the desorption gas becomes alkaline, and the alkaline desorption gas promotes desorption of the organic solvent from the activated carbon. be able to.

【0014】また、上記有機溶剤ガスに添加されるのは
弱塩基物であることから、有機溶剤とのケン化反応によ
る2次不純物生成等の弊害が発生することがなく、ま
た、脱離用ガスの液化により得られる水相のpH値も中
性に近いものとなるため、これをそのまま排水として放
流することができる。
Further, since the weakly basic substance is added to the organic solvent gas, no adverse effects such as secondary impurity generation due to the saponification reaction with the organic solvent occur, and the desorbing agent is used. Since the pH value of the water phase obtained by liquefying the gas becomes close to neutral, it can be discharged as it is as waste water.

【0015】したがって、本発明によれば、中和・精製
装置等の大掛かりな付帯処理設備を必要とせずに高品質
の回収溶剤を得ることができ、有機溶剤ガス回収に要す
る維持管理費の低減が図ることができ、しかも、回収溶
剤の中和処理による2次不純物も生成することのなく有
機溶剤ガスの回収を行うことができる。
Therefore, according to the present invention, a high-quality recovered solvent can be obtained without the need for a large-scale auxiliary treatment facility such as a neutralization / purification device, and the maintenance cost required for recovering the organic solvent gas can be reduced. In addition, the organic solvent gas can be recovered without producing secondary impurities due to the neutralization treatment of the recovered solvent.

【0016】[0016]

【実施例】以下、添付図面を参照しながら本発明の実施
例について説明する。
Embodiments of the present invention will be described below with reference to the accompanying drawings.

【0017】図1は、本発明に係る有機溶剤ガス回収方
法の一実施例に使用される有機溶剤ガス回収装置の概略
図である。
FIG. 1 is a schematic view of an organic solvent gas recovery apparatus used in an embodiment of the organic solvent gas recovery method according to the present invention.

【0018】図1に示すように、本実施例に係る有機溶
剤ガス回収装置は、図3に示す従来の有機溶剤ガス回収
装置に対し、中和・精製装置44が存在しない点、およ
び以下の構成が追加されている点で異なるが、その他の
構成は同様である。
As shown in FIG. 1, the organic solvent gas recovery apparatus according to this embodiment is different from the conventional organic solvent gas recovery apparatus shown in FIG. The other configurations are the same, except that the configuration is added.

【0019】本実施例に係る有機溶剤ガス回収装置にお
いては、有機溶剤ガス発生源より原ガス102(被処理
ガス)を原ガス送風ファン12に送る配管52に、配管
54が接続されている。そして、この配管54には、ア
ミン系有機溶剤タンク56とポンプ58と弁60とが設
けられている。そして、アミン系有機溶剤タンク56に
貯蔵されたアミン系有機溶剤(液体)を、ポンプ58に
より弁60を介して配管52へ送り出し、これにより、
アミン系有機溶剤を原ガス102中の有機溶剤ガスとと
もに原ガス送風ファン12を介して吸着装置14に供給
するようになっている。
In the organic solvent gas recovery apparatus according to this embodiment, a pipe 54 is connected to the pipe 52 for sending the raw gas 102 (gas to be treated) from the organic solvent gas generation source to the raw gas blowing fan 12. The pipe 54 is provided with an amine-based organic solvent tank 56, a pump 58 and a valve 60. Then, the amine-based organic solvent (liquid) stored in the amine-based organic solvent tank 56 is sent out to the pipe 52 via the valve 60 by the pump 58, whereby
The amine-based organic solvent is supplied to the adsorption device 14 together with the organic solvent gas in the raw gas 102 through the raw gas blowing fan 12.

【0020】吸着装置14の活性炭収納室14a(吸着
工程側の活性炭収納室)に供給された原ガス102は、
これに含有されている有機溶剤(アミン系有機溶剤を含
む)が該活性炭収納室14aにおいて活性炭16aに吸
着された後、大気中に放出される。
The raw gas 102 supplied to the activated carbon storage chamber 14a of the adsorption device 14 (the activated carbon storage chamber on the adsorption process side) is
The organic solvent (including an amine-based organic solvent) contained therein is adsorbed by the activated carbon 16a in the activated carbon storage chamber 14a and then released into the atmosphere.

【0021】吸着装置14のもう一方の活性炭収納室1
4b(脱離工程側の活性炭収納室)には、脱離用ガスと
して蒸気が供給される。この蒸気の温度および水分なら
びに活性炭16bの活性炭の触媒作用により有機溶剤が
分解して有機酸、無機酸、過酸化物等の不純物を生成し
ようとするが、本実施例においては、弱塩基性のアミン
系有機溶剤が有機溶剤の安定剤として作用し、これによ
り、上記不純物の生成が最小限に抑えられる。また、活
性炭収納室14bに供給された蒸気にアミン系有機溶剤
が同伴されるため該脱離用ガスはアルカリ性となり、こ
のアルカリ性脱離用ガスにより、活性炭16bからの有
機溶剤の脱離が促進される。
The other activated carbon storage chamber 1 of the adsorption device 14
4b (activated carbon storage chamber on the desorption process side) is supplied with vapor as a desorption gas. The organic solvent is decomposed by the temperature and moisture of the steam and the catalytic action of the activated carbon of the activated carbon 16b to generate impurities such as an organic acid, an inorganic acid, and a peroxide. The amine organic solvent acts as a stabilizer for the organic solvent, which minimizes the formation of the impurities. Further, since the amine-based organic solvent is entrained in the vapor supplied to the activated carbon storage chamber 14b, the desorption gas becomes alkaline, and the alkaline desorption gas promotes the desorption of the organic solvent from the activated carbon 16b. It

【0022】こうして得られた蒸気と有機溶剤とからな
る混合ガスは、配管18を介して送り出され、凝縮冷却
器20にて冷却されて凝縮液化した後、配管22を介し
て貯液槽(デカンタ)24に送り込まれて有機溶剤相と
水相に分離され、送液ポンプ26および28により廃液
水108および回収有機溶剤110が取り出される。回
収有機溶剤110は再利用される。
The mixed gas consisting of the vapor and the organic solvent thus obtained is sent out through a pipe 18, cooled by a condenser cooler 20 to be condensed and liquefied, and then through a pipe 22, a storage tank (decanter). ) 24 and separated into an organic solvent phase and an aqueous phase, and the liquid feed pumps 26 and 28 take out the waste liquid water 108 and the recovered organic solvent 110. The recovered organic solvent 110 is reused.

【0023】上記有機溶剤ガスに添加されるアミン系有
機溶剤は弱塩基物であることから、有機溶剤とのケン化
反応による2次不純物生成等の弊害が発生することがな
く、また、脱離用ガスの液化により得られる水相のpH
値も中性に近いものとなるため、これをそのまま排水と
して放流することができる。
Since the amine-based organic solvent added to the organic solvent gas is a weak base, no adverse effects such as secondary impurity formation due to saponification reaction with the organic solvent occur, and the elimination is eliminated. PH of the aqueous phase obtained by liquefying the working gas
Since the value is close to neutral, it can be discharged as waste water.

【0024】以上詳述したように、本実施例によれば、
中和・精製装置等の大掛かりな付帯処理設備を必要とせ
ずに高品質の回収溶剤を得ることができ、有機溶剤ガス
回収に要する維持管理費の低減が図ることができ、しか
も、回収溶剤の中和処理による2次不純物も生成するこ
とのなく有機溶剤ガスの回収を行うことができる。
As described in detail above, according to this embodiment,
It is possible to obtain a high-quality recovered solvent without the need for large-scale auxiliary treatment equipment such as a neutralization / purification device, and it is possible to reduce the maintenance cost required for recovering the organic solvent gas. The organic solvent gas can be recovered without producing secondary impurities due to the neutralization treatment.

【0025】上記実施例においては、有機溶剤ガスに添
加される弱塩基物としてアミン系有機溶剤を用いたが、
このアミン系有機溶剤に代えてアンモニアを用いても、
アンモニアは弱塩基物であることから、上記実施例と同
様の作用効果を得ることができる。その際、液体のアン
モニアを用いる場合には、上記アミン系有機溶剤タンク
56に代えてアンモニア(液体)を貯蔵するアンモニア
タンクを用いるようにすればよく、また、アンモニアガ
スを用いる場合には、図2に示すように、アンモニアガ
スが封入されたアンモニアガスボンベ62を用いるよう
にすればよい。なお、このアンモニアガスボンベ62を
用いる場合には、上記実施例におけるポンプ58は不要
となる。
In the above examples, an amine organic solvent was used as the weak base substance added to the organic solvent gas.
Even if ammonia is used instead of this amine-based organic solvent,
Since ammonia is a weak base substance, it is possible to obtain the same effects as those of the above-mentioned embodiment. At that time, when liquid ammonia is used, an ammonia tank for storing ammonia (liquid) may be used instead of the amine-based organic solvent tank 56, and when ammonia gas is used, As shown in 2, an ammonia gas cylinder 62 filled with ammonia gas may be used. When the ammonia gas cylinder 62 is used, the pump 58 in the above embodiment is unnecessary.

【0026】また上記実施例においては、吸着装置14
として固定層活性炭吸着装置を用いたが、移動層活性炭
吸着装置、流動層活性炭吸着装置、活性炭素系フィルタ
状吸着装置を用いるようにしてもよく、このようにした
場合にも上記実施例と同様の作用効果を得ることができ
る。
Further, in the above embodiment, the adsorption device 14
Although the fixed bed activated carbon adsorbing device was used as the above, a moving bed activated carbon adsorbing device, a fluidized bed activated carbon adsorbing device, or an activated carbon-based filter-like adsorbing device may be used. The effect of can be obtained.

【0027】次に、本発明の作用効果を確認するために
行った2つの有機溶剤ガス回収実験の内容について説明
する。これらの実験は、上記実施例等と従来例とについ
ての比較実験である。
Next, the contents of two organic solvent gas recovery experiments carried out to confirm the effects of the present invention will be described. These experiments are comparative experiments of the above-described examples and the like and the conventional example.

【0028】実験条件および実験結果は以下に示す通り
であるが、各実験結果を示す表において、「従来技術−
1」は、図3において、中和・精製装置44を用いずに
脱離用ガス104の凝縮液を配管22を介して貯液槽2
4に直接送るタイプの有機溶剤ガス回収装置を用いたも
のであり、「従来技術−2」は、図3において、脱離用
ガス104の凝縮液を中和・精製装置44を介して貯液
槽24に送るタイプの有機溶剤ガス回収装置を用いたも
のであり、「新規技術ー1」は、図1に示す有機溶剤ガ
ス回収装置(アミン系有機溶剤使用)を用いたものであ
り、「新規技術ー2」は、図1に示す有機溶剤ガス回収
装置(アンモニア使用)を用いたものであり、「新規技
術ー3」は、図2に示す有機溶剤ガス回収装置(アンモ
ニアガス使用)を用いたものである。
The experimental conditions and the experimental results are as follows. In the table showing the experimental results, "Prior Art-
1 ”in FIG. 3, the condensate of the desorption gas 104 is supplied to the liquid storage tank 2 through the pipe 22 without using the neutralization / purification device 44.
4 is a type that uses an organic solvent gas recovery device that directly sends the condensed gas of the desorption gas 104 through the neutralization / purification device 44 in FIG. The organic solvent gas recovery device of the type of sending to the tank 24 is used, and the "new technology-1" uses the organic solvent gas recovery device (using an amine-based organic solvent) shown in FIG. "New technology-2" uses the organic solvent gas recovery apparatus (using ammonia) shown in FIG. 1, and "New technology-3" uses the organic solvent gas recovery apparatus (using ammonia gas) shown in FIG. Used.

【0029】(1) 実験例−1 <原ガスおよび吸着条件> −1.原ガス量 100Nm3 /min −2.有機溶剤ガス名 酢酸ブチル −3.有機溶剤ガス濃度 1,500ppm(vo
l.) −4.原ガス温度 30℃ −5.吸着時間 60分 −6.アミン系有機溶剤 エチレンジアミン <脱離条件> −1.脱離蒸気量 230Kg/Hr −2.脱離時間 60分
(1) Experimental Example-1 <Original Gas and Adsorption Conditions> -1. Raw gas amount 100 Nm 3 / min -2. Organic solvent gas name Butyl acetate-3. Organic solvent gas concentration 1,500ppm (vo
l. ) -4. Raw gas temperature 30 ° C-5. Adsorption time 60 minutes-6. Amine-based organic solvent ethylenediamine <desorption conditions> -1. Desorbed vapor amount 230 Kg / Hr -2. Desorption time 60 minutes

【0030】[0030]

【表1】 [Table 1]

【0031】《注記》 1) 回収溶剤品質“酸価値”は、“JIS K151
1”における酸価測定法による。
<< Note >> 1) The quality of recovered solvent "acid value" is "JIS K151".
1 "by the acid value measuring method.

【0032】2) “従来技術−2”では、“1%NaO
H”添加により“ブチル・アルコール:15ppm”検
出した。これは酢酸ブチルに強塩基物を添加したため、
いわゆる“ケン化反応”が生じ、不純物が生成した。こ
の不純物は、回収溶剤を繰り返し使用することにより、
回収溶剤に徐々に蓄積し高濃度となるため、精製処理
(蒸留分離)による分離除去が必要である。
2) In "prior art-2", "1% NaO
"Butyl alcohol: 15 ppm" was detected by the addition of "H". This is because a strong base compound was added to butyl acetate.
So-called "saponification reaction" occurred and impurities were produced. This impurity can be recovered by repeatedly using the recovered solvent.
Since it gradually accumulates in the recovered solvent and becomes a high concentration, it is necessary to separate and remove it by a purification treatment (distillation separation).

【0033】(2) 実験例−2 <原ガスおよび吸着条件> −1.原ガス量 150Nm3 /min −2.有機溶剤ガス名 MEK(メチルエチルケト
ン) −3.有機溶剤ガス濃度 1,200ppm(vo
l.) −4.原ガス温度 30℃ −5.吸着時間 60分 −6.アミン系有機溶剤 トリエチルアミン <脱離条件> −1.脱離蒸気量 320Kg/Hr −2.脱離時間 60分
(2) Experimental Example-2 <Original Gas and Adsorption Conditions> -1. Raw gas amount 150 Nm 3 / min -2. Organic solvent gas name MEK (methyl ethyl ketone) -3. Organic solvent gas concentration 1,200ppm (vo
l. ) -4. Raw gas temperature 30 ° C-5. Adsorption time 60 minutes-6. Amine-based organic solvent triethylamine <elimination conditions> -1. Desorbed vapor amount 320 Kg / Hr -2. Desorption time 60 minutes

【0034】[0034]

【表2】 [Table 2]

【0035】《注記》 1) 回収溶剤品質“酸価値”は、“JIS K151
1”における酸価測定法による。
<< Note >> 1) The quality of recovered solvent "acid value" is "JIS K151".
1 "by the acid value measuring method.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る有機溶剤ガス回収方法の一実施例
に使用される有機溶剤ガス回収装置の概略図
FIG. 1 is a schematic view of an organic solvent gas recovery apparatus used in an embodiment of an organic solvent gas recovery method according to the present invention.

【図2】上記実施例の変形例を示す図FIG. 2 is a diagram showing a modification of the above embodiment.

【図3】従来例を示す、図1と同様の図FIG. 3 is a view similar to FIG. 1 showing a conventional example.

【符号の説明】[Explanation of symbols]

12 原ガス送風ファン 14 吸着装置 14a、14b 活性炭収納室 16a、16b 活性炭 20 凝縮冷却器 24 貯液槽 26 送液ポンプ 102 原ガス(被処理ガス) 104 脱離用ガス 106 冷却水 108 廃液水 110 回収有機溶剤 52,54 配管 56 アミン系有機溶剤タンク 58 ポンプ 60 弁 62 アンモニアガスボンベ 12 Raw Gas Blower Fan 14 Adsorption Device 14a, 14b Activated Carbon Storage Chamber 16a, 16b Activated Carbon 20 Condenser Cooler 24 Liquid Storage Tank 26 Liquid Pump 102 Raw Gas (Processing Gas) 104 Desorption Gas 106 Cooling Water 108 Waste Water 110 Recovered organic solvent 52, 54 Piping 56 Amine organic solvent tank 58 Pump 60 Valve 62 Ammonia gas cylinder

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 B01D 53/34 ZAB ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B01D 53/34 ZAB

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 活性炭を備えた吸着装置に有機溶剤ガス
を含む被処理ガスを供給して前記有機溶剤ガスを前記活
性炭に吸着させ、その後、前記吸着装置に脱離用ガスを
供給して前記活性炭に吸着された前記有機溶剤を脱離さ
せ、この脱離した有機溶剤を含有する前記脱離用ガスを
液化しさらに有機溶剤相と水相とに分離することによ
り、前記被処理ガス中の前記有機溶剤ガスを回収する有
機溶剤ガス回収方法において、 前記吸着装置に前記被処理ガスを供給する際、該被処理
ガスに弱塩基物を添加する、ことを特徴とする有機溶剤
ガス回収方法。
1. A gas to be treated containing an organic solvent gas is supplied to an adsorption device equipped with activated carbon to adsorb the organic solvent gas on the activated carbon, and then a desorption gas is supplied to the adsorption device. The organic solvent adsorbed on the activated carbon is desorbed, the desorption gas containing the desorbed organic solvent is liquefied and further separated into an organic solvent phase and an aqueous phase, thereby In the organic solvent gas recovery method for recovering the organic solvent gas, a weak base substance is added to the gas to be treated when the gas to be treated is supplied to the adsorption device.
JP5173157A 1993-07-13 1993-07-13 Method for recovering organic solvent gas Withdrawn JPH0724249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5173157A JPH0724249A (en) 1993-07-13 1993-07-13 Method for recovering organic solvent gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5173157A JPH0724249A (en) 1993-07-13 1993-07-13 Method for recovering organic solvent gas

Publications (1)

Publication Number Publication Date
JPH0724249A true JPH0724249A (en) 1995-01-27

Family

ID=15955161

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5173157A Withdrawn JPH0724249A (en) 1993-07-13 1993-07-13 Method for recovering organic solvent gas

Country Status (1)

Country Link
JP (1) JPH0724249A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010016046A (en) * 2008-07-01 2010-01-21 Yasuhara Chemical Co Ltd Polysilazane-dissolving treatment liquid, and manufacturing method of semiconductor device using the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010016046A (en) * 2008-07-01 2010-01-21 Yasuhara Chemical Co Ltd Polysilazane-dissolving treatment liquid, and manufacturing method of semiconductor device using the same
JP4718584B2 (en) * 2008-07-01 2011-07-06 ヤスハラケミカル株式会社 Treatment liquid for dissolving polysilazane and method for manufacturing semiconductor device using the same

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