JP2006187698A - Organic solvent gas treatment device - Google Patents

Organic solvent gas treatment device Download PDF

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JP2006187698A
JP2006187698A JP2005000066A JP2005000066A JP2006187698A JP 2006187698 A JP2006187698 A JP 2006187698A JP 2005000066 A JP2005000066 A JP 2005000066A JP 2005000066 A JP2005000066 A JP 2005000066A JP 2006187698 A JP2006187698 A JP 2006187698A
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zone
adsorption
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organic solvent
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Yasuhiro Tanaka
康弘 田中
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Seibu Giken Co Ltd
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Seibu Giken Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic solvent gas treatment device capable of particularly enhancing magnification of concentration. <P>SOLUTION: In order to solve the above problem, an adsorption rotor 1 is divided to an adsorption zone 2, a purge zone 4 and a regeneration zone 3; a gas to be treated is passed through the adsorption zone 2 and the purge zone 4, the gas passed through the adsorption zone 2 is released to an atmosphere and the gas passing through the purge zone 4 is passed through a heater 7; the gas passed through the heater 7 is passed through the regeneration zone 3; and a part of the gas passed through the regeneration zone 3 is passes through an oxidation treatment device 11 and the remaining of the gas passed through the regeneration zone 3 is returned to an entrance of the heater 7. Thereby, high magnification of concentration can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、たとえばゼオライトなどの吸着剤を有する吸着ロータ用いた有機溶剤ガス処理装置に関するもので、特に濃縮倍率を高くすることが可能でランニングコストの低いものを提供するものである。   The present invention relates to an organic solvent gas processing apparatus using an adsorption rotor having an adsorbent such as zeolite, for example, and particularly provides an apparatus capable of increasing the concentration factor and having a low running cost.

現在、例えば印刷工場や塗装工場などから排出される有機溶剤ガスは、大気汚染の大きな原因となっており、排出を抑制することが重要な課題になっている。この処理方法として、排出ガスを濃縮し触媒や燃焼装置を用いて焼却することが処理費用の点から最も普及している。   Currently, organic solvent gas discharged from, for example, a printing factory or a coating factory is a major cause of air pollution, and it is an important issue to suppress the emission. As this processing method, the exhaust gas is concentrated and incinerated using a catalyst or a combustion device is most popular from the viewpoint of processing cost.

そして排出ガスを濃縮するための有機溶剤ガス処理装置も種々のものが開発されている。この中で吸着ロータを用いることによって、吸着濃縮を行うものは構造が簡単であって、省エネルギー効果が高くなるため急速に普及している。   Various organic solvent gas treatment apparatuses for concentrating exhaust gas have been developed. Among them, the one that performs adsorption concentration by using an adsorption rotor has a simple structure, and the energy saving effect is enhanced, so that it is rapidly spreading.

このような有機溶剤ガス処理装置は、より濃縮倍率を高くしランニングコストを安くするものの開発が求められている。このような技術として例えば特許文献１に開示されたものがある。
特開平成７年−２５６０４７号公報 Such an organic solvent gas treatment apparatus is required to be developed with a higher concentration ratio and lower running cost. An example of such a technique is disclosed in Patent Document 1.
Japanese Unexamined Patent Publication No. 1995-256047

特許文献１に開示されたものは吸着ロータの再生ゾーンから出たガスを触媒槽に流しながら再び再生ゾーンに循環させるようにしたものである。   The one disclosed in Patent Document 1 is such that the gas emitted from the regeneration zone of the adsorption rotor is recirculated to the regeneration zone while flowing into the catalyst tank.

しかし特許文献１に記載のものは、パージゾーンへ流すガスとして吸着ゾーンを通過したガスを用いている。このパージゾーンへ流すガスは温度が上昇しており冷却作用が少なく、吸着ゾーンでの吸着作用が弱くなり濃縮倍率を上げ難いという問題がある。   However, the thing of patent document 1 uses the gas which passed the adsorption zone as gas sent to a purge zone. The gas flowing into the purge zone has a problem that the temperature rises and the cooling action is small, the adsorption action in the adsorption zone becomes weak, and it is difficult to increase the concentration factor.

またパージゾーンを通過したガスと再生ゾーンを通過したガスとを混合しているため、触媒槽で酸化させるガスの量が多くなり、触媒槽として容量の大きな物が求められるという問題がある。   In addition, since the gas that has passed through the purge zone and the gas that has passed through the regeneration zone are mixed, there is a problem that the amount of gas to be oxidized in the catalyst tank increases, and a large-capacity catalyst tank is required.

本発明は酸化させるガスの量を最小限にして処理を容易にすることが可能で、これによってランニングコストを小さくすることが可能な有機溶剤ガス処理装置を提供しようとするものである。   The present invention is intended to provide an organic solvent gas processing apparatus which can facilitate the processing by minimizing the amount of gas to be oxidized, thereby reducing the running cost.

本件発明は以上のような課題を解決するため、吸着ロータを吸着ゾーン、パージゾーン、再生ゾーンに分割し、被処理ガスを吸着ゾーンとパージゾーンとに通し、吸着ゾーンを通過したガスは大気放出するとともにパージゾーンを通過したガスをヒータへ通し、ヒータを通過したガスを再生ゾーンに通し、再生ゾーンを通過したガスの一部を処理装置へ通すとともに再生ゾーンを通過したガスの残りをヒータの入口へ戻すようにした。   In order to solve the above problems, the present invention divides the adsorption rotor into an adsorption zone, a purge zone, and a regeneration zone, passes the gas to be treated through the adsorption zone and the purge zone, and releases the gas that has passed through the adsorption zone to the atmosphere. In addition, the gas that has passed through the purge zone is passed through the heater, the gas that has passed through the heater is passed through the regeneration zone, a part of the gas that has passed through the regeneration zone is passed through the processing device, and the remainder of the gas that has passed through the regeneration zone is passed through the heater. Returned to the entrance.

本発明の有機溶剤ガス処理装置は上記の如く構成したので、最もガス濃度の高い部分即ち再生ゾーンを出たガスの一部を処理装置へ送ることができ、処理装置は小さな物でよい。   Since the organic solvent gas processing apparatus of the present invention is configured as described above, a part having the highest gas concentration, that is, a part of the gas exiting the regeneration zone can be sent to the processing apparatus, and the processing apparatus may be small.

しかも酸化処理装置に入るガス濃度が高いため被処理ガスの濃度によっては自己燃焼可能な濃度つまり１００ppm以上とすることができ、この場合には酸化処理装置は触媒を使わない簡単な燃焼装置でよいため安価に実現することができ、さらに燃焼に伴う補助燃料が不要であるためランニングコストが安価であるとともに排出ＣＯ2も少ない。 Moreover, since the concentration of the gas entering the oxidation treatment apparatus is high, depending on the concentration of the gas to be treated, the self-combustible concentration, that is, 100 ppm or more can be achieved. In this case, the oxidation treatment apparatus may be a simple combustion apparatus that does not use a catalyst. Therefore, it can be realized at a low cost. Further, since auxiliary fuel accompanying combustion is not necessary, the running cost is low and the emission CO 2 is small.

そして吸着ゾーン及びパージゾーンは正圧、再生ゾーンは負圧となるため、各ゾーン間でリークがあっても、最もガス濃度の高い再生ゾーンのガスが吸着ゾーンへ混入することがない。つまりリークによって最もガス濃度の高い再生ゾーンのガスが吸着ゾーンへ混入し、大気へ有機溶剤ガスが放出されることはない。   Since the adsorption zone and the purge zone have a positive pressure and the regeneration zone has a negative pressure, even if there is a leak between the zones, the gas in the regeneration zone having the highest gas concentration does not enter the adsorption zone. That is, the gas in the regeneration zone having the highest gas concentration is mixed into the adsorption zone due to the leak, and the organic solvent gas is not released to the atmosphere.

また、一般的に最も温度の低い被処理ガスによって再生ゾーンを出た後の吸着ロータをパージしているため、吸着ロータの冷却効果が高く、吸着ロータは高い吸着性能を発揮することができる。そして再生ゾーンを出たガスのうち、酸化処理装置へ送る割合を調整することによって被処理ガス中の有機溶剤ガスの濃縮率を自由に設定可能な有機溶剤ガス処理装置を提供することができる。   Further, since the adsorption rotor after purging the regeneration zone with the gas to be processed having the lowest temperature is generally purged, the adsorption rotor has a high cooling effect, and the adsorption rotor can exhibit high adsorption performance. And the organic solvent gas processing apparatus which can set freely the concentration rate of the organic solvent gas in to-be-processed gas can be provided by adjusting the ratio sent to an oxidation processing apparatus among the gas which came out of the regeneration zone.

また再生ゾーンの出口側にブロアを設け、このブロアの出口をヒータ側と酸化処理装置側へと分岐しているため、酸化処理装置へは正圧でガスが送られるようになり、酸化処理装置に改めてブロアなどの設置の必要がない。   Also, a blower is provided on the outlet side of the regeneration zone, and the outlet of this blower is branched to the heater side and the oxidation treatment device side, so that gas is sent to the oxidation treatment device at a positive pressure, and the oxidation treatment device There is no need to install a blower.

本発明の請求項１に記載の発明は、有機溶剤ガスの吸着能力を有する吸着ロータを備え、吸着ロータを少なくとも吸着ゾーン、パージゾーン、再生ゾーンに分割し、被処理ガスを吸着ゾーンとパージゾーンとに通し、吸着ゾーンを通過したガスは大気放出するとともにパージゾーンを通過したガスをヒータへ通し、ヒータを通過したガスを再生ゾーンに通し、再生ゾーンを通過したガスの一部を処理装置へ通すとともに再生ゾーンを通過したガスの残りをヒータの入口へ戻すようにしたものであり、濃縮倍率を上げることができるという作用を有する。   The invention according to claim 1 of the present invention includes an adsorption rotor having an adsorption capability of an organic solvent gas, the adsorption rotor is divided into at least an adsorption zone, a purge zone, and a regeneration zone, and the gas to be treated is adsorbed into the adsorption zone and the purge zone. The gas that has passed through the adsorption zone is released into the atmosphere, the gas that has passed through the purge zone is passed to the heater, the gas that has passed through the heater is passed to the regeneration zone, and part of the gas that has passed through the regeneration zone is passed to the processing device. The gas remaining through the regeneration zone is returned to the inlet of the heater, and has the effect of increasing the concentration factor.

以下本発明の有機溶剤ガス処理装置の実施例について図に沿って詳細に説明する。図１は本発明の有機溶剤ガス処理装置のガス流れ図である。吸着ロータ１は例えばセラッミック紙をハニカム（蜂の巣）状に成形し、これに疎水性ゼオライトなどの吸着剤を担持させたもので、ギヤドモータ（図示せず）などによってゆっくりと回転する。   Embodiments of the organic solvent gas processing apparatus of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a gas flow chart of the organic solvent gas processing apparatus of the present invention. The adsorption rotor 1 is formed, for example, by forming ceramic paper into a honeycomb (honeycomb) shape and carrying an adsorbent such as hydrophobic zeolite, and is rotated slowly by a geared motor (not shown).

また吸着ロータ１は被処理ガス中の有機溶剤ガスを吸着する吸着ゾーン２、吸着ロータ１に吸着された有機溶剤ガスを脱着し再生する再生ゾーン３及び再生ゾーン３で温度の上がった吸着ロータを冷却するパージゾーン４とに分割され、各ゾーンの間でガスの混入がないように各ゾーン間にはシール部材が設けられている。   The adsorption rotor 1 includes an adsorption zone 2 that adsorbs the organic solvent gas in the gas to be treated, a regeneration zone 3 that desorbs and regenerates the organic solvent gas adsorbed on the adsorption rotor 1, and an adsorption rotor whose temperature has increased in the regeneration zone 3. It is divided into purge zones 4 to be cooled, and seal members are provided between the zones so that no gas is mixed between the zones.

塗装ブースや印刷工場などの有機溶剤ガス発生源５からの有機溶剤ガスはブロア６によって吸着ゾーン２とパージゾーン４とに送られる。パージゾーン４を出たガスはヒータ７で加熱される。ヒータ７の出口は再生ゾーン３に接続され、再生ゾーン３の出口にはブロア８が設けられ、ブロア８の出口はヒータ７の入口に接続され、これによって再生ゾーン３からブロア８を通過して再びヒータ７に至る循環路９が形成されている。   Organic solvent gas from an organic solvent gas generation source 5 such as a painting booth or a printing factory is sent to the adsorption zone 2 and the purge zone 4 by a blower 6. The gas leaving the purge zone 4 is heated by the heater 7. The outlet of the heater 7 is connected to the regeneration zone 3, and the blower 8 is provided at the outlet of the regeneration zone 3, and the outlet of the blower 8 is connected to the inlet of the heater 7, thereby passing the blower 8 from the regeneration zone 3. A circulation path 9 reaching the heater 7 is formed again.

また再生ゾーン３の出口に設けられたブロア８からボリュームダンパ１０を介して燃焼装置や触媒などの酸化処理装置１１が接続されている。また循環路９にもボリュームダンパ１２が設けられ、ボリュームダンパ１０及び１２を調整することによって循環路９へ流れるガスの量と酸化処理装置１１へ流れるガスの量との比を調節することができる。   Further, an oxidation treatment device 11 such as a combustion device or a catalyst is connected from a blower 8 provided at the outlet of the regeneration zone 3 via a volume damper 10. The circulation path 9 is also provided with a volume damper 12, and by adjusting the volume dampers 10 and 12, the ratio of the amount of gas flowing to the circulation path 9 and the amount of gas flowing to the oxidation treatment apparatus 11 can be adjusted. .

以上構成の本発明の有機溶剤ガス処理装置の動作について以下説明する。先ず吸着ロータ１を回転させながらブロア６、ブロア８及びヒータ７を動作させる。これによって有機溶剤ガス発生源５からのガスはブロア６によって吸着ゾーン２とパージゾーン４とに送られる。   The operation of the organic solvent gas processing apparatus of the present invention having the above configuration will be described below. First, the blower 6, the blower 8 and the heater 7 are operated while rotating the suction rotor 1. As a result, the gas from the organic solvent gas generation source 5 is sent to the adsorption zone 2 and the purge zone 4 by the blower 6.

吸着ゾーン２を通過することによって有機溶剤ガス発生源５からのガス中の有機溶剤ガスは例えば除去効率９８％以上で吸着ロータ１に吸着され浄化される。これによって吸着ゾーン２を出たガスは大気放出が可能となる。   By passing through the adsorption zone 2, the organic solvent gas in the gas from the organic solvent gas generation source 5 is adsorbed and purified by the adsorption rotor 1 with a removal efficiency of 98% or more, for example. As a result, the gas leaving the adsorption zone 2 can be released into the atmosphere.

パージゾーン４に送られたガスは再生ゾーン３で加熱された吸着ロータ１の熱を奪い吸着ロータ１を冷却するとともに、パージゾーン４を出たガスは温度が上昇する。パージゾーン４で温度の上昇したガスはヒータ７でさらに加熱され２００℃程度まで温度が上昇する。   The gas sent to the purge zone 4 takes the heat of the adsorption rotor 1 heated in the regeneration zone 3 to cool the adsorption rotor 1, and the temperature of the gas leaving the purge zone 4 rises. The gas whose temperature has risen in the purge zone 4 is further heated by the heater 7 and the temperature rises to about 200.degree.

このヒータ７を出た高温のガスは再生ゾーン３に入り、吸着ロータ１に吸着された有機溶剤ガスを脱着する。ここで再生ゾーン３を通過するガスの量が吸着ゾーン２を通過するガスの量の１／１０であった場合は、運転の初期状態では再生ゾーン３を出たガスの濃度は吸着ゾーン２に入るガスの１０倍に濃縮される。つまり被処理ガス濃度が５０ｐｐｍであった場合、再生ゾーン３を出たガス濃度は５００ｐｐｍになる。   The high-temperature gas exiting the heater 7 enters the regeneration zone 3 and desorbs the organic solvent gas adsorbed by the adsorption rotor 1. Here, when the amount of gas passing through the regeneration zone 3 is 1/10 of the amount of gas passing through the adsorption zone 2, the concentration of the gas exiting the regeneration zone 3 in the initial state of operation is the adsorption zone 2. Concentrates 10 times the incoming gas. That is, when the concentration of the gas to be treated is 50 ppm, the concentration of gas exiting the regeneration zone 3 is 500 ppm.

再生ゾーン３の出口から出たガスの一部は、ブロア８によって再びヒータ７に入る循環路９を通過する。つまり循環路９に入ったガスの残りは酸化処理装置１１へ流れ、酸化されて二酸化炭素と水に分解され無害なガスとなって大気放出される。   Part of the gas exiting the regeneration zone 3 passes through the circulation path 9 that enters the heater 7 again by the blower 8. That is, the remainder of the gas that has entered the circulation path 9 flows to the oxidation treatment device 11 where it is oxidized and decomposed into carbon dioxide and water to be harmless and released into the atmosphere.

ここで、再生ゾーン３の出口から出たガスの半分が循環路９に流れ、残りの半分が酸化処理装置１１へ流れるとすると、酸化処理装置１１へ流れるガスの量は被処理ガスの量の１／２０となり、濃縮倍率は２０倍となる。つまり酸化処理装置１１へ送られるガス濃度は１０００ｐｐｍとなる。   Here, assuming that half of the gas exiting from the outlet of the regeneration zone 3 flows into the circulation path 9 and the other half flows into the oxidation treatment apparatus 11, the amount of gas flowing into the oxidation treatment apparatus 11 is the amount of the gas to be treated. 1/20 and the concentration factor is 20 times. That is, the gas concentration sent to the oxidation treatment apparatus 11 is 1000 ppm.

ボリュームダンパ１０及び１２を調整することによって、循環路９に流れるガスの量と酸化処理装置１１へ流れるガスの量との比を変えることができる。酸化処理装置１１へ流れるガスの量を減らすと濃縮倍率が高くなるが、除去効率が下がる。逆に酸化処理装置１１へ流れるガスの量を増やすと濃縮倍率が低くなるが、除去効率が上がる。   By adjusting the volume dampers 10 and 12, the ratio of the amount of gas flowing to the circulation path 9 and the amount of gas flowing to the oxidation treatment apparatus 11 can be changed. If the amount of gas flowing to the oxidation treatment device 11 is reduced, the concentration factor increases, but the removal efficiency decreases. Conversely, if the amount of gas flowing to the oxidation treatment apparatus 11 is increased, the concentration factor is lowered, but the removal efficiency is increased.

被処理ガスの種類や量に応じて、或いは酸化処理装置１１の特性に合わせてボリュームダンパ１０及び１２を調整することができる。つまり疎水性ゼオライトで極めて良好な吸着特性を示すトルエンやキシレンなどのガスを処理する場合には、循環路９へ流す率を高めても除去効率は高く維持することができる。   The volume dampers 10 and 12 can be adjusted according to the type and amount of the gas to be processed or according to the characteristics of the oxidation processing apparatus 11. That is, when treating a gas such as toluene or xylene that exhibits very good adsorption characteristics with hydrophobic zeolite, the removal efficiency can be maintained high even if the rate of flow to the circulation path 9 is increased.

以上の実施例では酸化処理装置１１を示したが、これ以外に処理装置としては凝縮などの回収装置であってもよい。   Although the oxidation processing apparatus 11 is shown in the above embodiment, the processing apparatus may be a recovery apparatus such as condensation.

本発明は、有害な有機溶剤ガスを処理するものであり、特に濃縮倍率を上げることができる有機溶剤ガス処理装置を提供する。   The present invention treats harmful organic solvent gas, and provides an organic solvent gas treatment apparatus capable of increasing the concentration rate.

本発明の有機溶剤ガス処理装置の実施例を示す流れ図である。It is a flowchart which shows the Example of the organic-solvent gas processing apparatus of this invention.

符号の説明Explanation of symbols

１ 吸着ロータ
２ 吸着ゾーン
３ 再生ゾーン
４ パージゾーン
５ 有機溶剤ガス発生源
６ ブロア
７ ヒータ
８ ブロア
９ 循環路
１０、１２ ボリュームダンパ
１１ 酸化処理装置
DESCRIPTION OF SYMBOLS 1 Adsorption rotor 2 Adsorption zone 3 Regeneration zone 4 Purge zone 5 Organic solvent gas generation source 6 Blower 7 Heater 8 Blower 9 Circulation path 10, 12 Volume damper 11 Oxidation processing apparatus

Claims (3)

有機溶剤ガスの吸着能力を有する吸着ロータを備え、前記吸着ロータを少なくとも吸着ゾーン、パージゾーン、再生ゾーンに分割し、被処理ガスを前記吸着ゾーンと前記パージゾーンとに通し、前記吸着ゾーンを通過したガスは大気放出するとともに前記パージゾーンを通過したガスをヒータへ通し、前記ヒータを通過したガスを前記再生ゾーンに通し、前記再生ゾーンを通過したガスの一部を処理装置へ通すとともに前記再生ゾーンを通過したガスの残りを前記ヒータの入口へ戻すようにした有機溶剤ガス処理装置。 An adsorption rotor having an adsorption capacity for organic solvent gas is provided. The adsorption rotor is divided into at least an adsorption zone, a purge zone, and a regeneration zone, and a gas to be treated is passed through the adsorption zone and the purge zone, and passes through the adsorption zone. The gas that has passed through the purge zone passes through the heater, the gas that passes through the heater passes through the regeneration zone, and part of the gas that passes through the regeneration zone passes through the processing device and the regeneration. An organic solvent gas processing apparatus configured to return the remaining gas that has passed through the zone to the inlet of the heater. 再生ゾーンを通過し処理装置へ通すガスの量と、再生ゾーンを通過しヒータの入口へ戻すガスの量との比を調節可能にした請求項１記載の有機溶剤ガス処理装置。 2. The organic solvent gas processing apparatus according to claim 1, wherein the ratio between the amount of gas passing through the regeneration zone and passing through the processing apparatus and the amount of gas passing through the regeneration zone and returned to the inlet of the heater can be adjusted. 再生ゾーンの出口側にブロアを設け、このブロアから出たガスを処理装置及びヒータ入口へと送るようにした請求項１記載の有機溶剤ガス処理装置。 2. The organic solvent gas processing apparatus according to claim 1, wherein a blower is provided at the outlet side of the regeneration zone, and gas discharged from the blower is sent to the processing apparatus and the heater inlet.
JP2005000066A 2005-01-04 2005-01-04 Organic solvent gas treatment device Pending JP2006187698A (en)

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JP2009160484A (en) * 2007-12-28 2009-07-23 Toyobo Co Ltd Organic solvent containing gas treatment system
JP2010227870A (en) * 2009-03-27 2010-10-14 Taikisha Ltd Adsorption rotor type gas treatment apparatus, and method for manufacturing adsorption rotor
JP2012061389A (en) * 2010-09-14 2012-03-29 Taikisha Ltd Adsorption/desorption type concentration device
JP2012115773A (en) * 2010-12-01 2012-06-21 Taikisha Ltd Adsorption/desorption type concentrator
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JP5877922B1 (en) * 2014-12-19 2016-03-08 株式会社西部技研 Absorption type removal and concentration equipment
JP5795423B1 (en) * 2014-12-19 2015-10-14 株式会社西部技研 Absorption type removal and concentration equipment
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KR101717535B1 (en) * 2016-08-29 2017-03-17 김흥석 System for treating VOC and Method for treating VOC using the same
WO2019069607A1 (en) * 2017-10-05 2019-04-11 株式会社西部技研 Carbon dioxide concentration device
JP2019062862A (en) * 2017-10-05 2019-04-25 株式会社西部技研 Carbon dioxide concentrator
JP7036414B2 (en) 2017-10-05 2022-03-15 株式会社西部技研 Carbon dioxide concentrator
CN110935285A (en) * 2019-12-31 2020-03-31 西部技研环保节能设备（常熟）有限公司 Regenerative air partial proportioning circulation VOC concentration process
JP7481859B2 (en) 2020-02-28 2024-05-13 株式会社西部技研 Gas Separation and Recovery Equipment

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