JPH08294614A - Purification apparatus for gas to be treated - Google Patents
Purification apparatus for gas to be treatedInfo
- Publication number
- JPH08294614A JPH08294614A JP7102588A JP10258895A JPH08294614A JP H08294614 A JPH08294614 A JP H08294614A JP 7102588 A JP7102588 A JP 7102588A JP 10258895 A JP10258895 A JP 10258895A JP H08294614 A JPH08294614 A JP H08294614A
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- Prior art keywords
- gas
- adsorption
- treated
- layers
- layer
- Prior art date
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- Separation Of Gases By Adsorption (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、産業施設から発生する
有毒もしくは悪臭等の有害物質を含有する被処理ガスの
浄化装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for purifying a gas to be treated containing a harmful substance such as poisonous or malodor generated from an industrial facility.
【０００２】[0002]
【従来の技術】近年、環境保全のため揮発性有機化合物
の排出基準が強化される傾向にある。例えば、印刷もし
くは塗装工場の被処理ガスにはトルエン、キシレン等の
溶剤、合成繊維工場からはホルムアルデヒド等の刺激性
有機化合物、合成化学工場のプロセスから排出される被
処理ガス中にはフタル酸、マレイン酸及び酸化エチレ
ン、パルプ工場の場合には硫化水素、メチルメルカプタ
ンなどの悪臭物質などが含まれており、各産業施設では
これらの被処理ガスに水や薬液による洗浄、バーナや触
媒による燃焼、オゾンによる酸化、吸着剤による吸着処
理などを実施し、被処理ガスを浄化してから屋外に放出
している。2. Description of the Related Art In recent years, emission standards for volatile organic compounds have tended to be strengthened for environmental protection. For example, solvents such as toluene and xylene are used as the gas to be processed in the printing or painting factory, irritating organic compounds such as formaldehyde from the synthetic fiber factory, and phthalic acid is contained in the gas to be discharged from the process of the synthetic chemical factory. Maleic acid and ethylene oxide, in the case of pulp mills, hydrogen sulfide, malodorous substances such as methyl mercaptan, etc. are contained, and at each industrial facility, these gases to be treated are cleaned with water or chemicals, burners or burned with a catalyst, Oxidation with ozone, adsorption treatment with an adsorbent, etc. are performed to purify the gas to be treated before it is released outdoors.
【０００３】従来、吸着剤による吸着処理と触媒による
触媒酸化処理を組み合わせた被処理ガス浄化装置は、浄
化処理と吸着剤の再生処理を同時に行なうので、長期間
に渡って吸着剤の交換が不要であり、又、再生時に被処
理ガス成分の濃度を高めて触媒酸化処理を行なうので、
触媒燃焼装置を小型化したり燃料費を低減出来、注目さ
れており適用例も増えている（特開平４−１１８０１９
公報、特開平４−１１８０２０公報等）。Conventionally, a gas purifying apparatus to be treated, which is a combination of an adsorption treatment with an adsorbent and a catalytic oxidation treatment with a catalyst, carries out purification treatment and regeneration treatment of the adsorbent at the same time, so that it is not necessary to exchange the adsorbent for a long period of time. In addition, since the catalytic oxidation treatment is performed by increasing the concentration of the gas component to be treated during regeneration,
The catalytic combustion device can be downsized and the fuel cost can be reduced, and it is attracting attention and its application examples are increasing (Japanese Patent Laid-Open No. 4-118019).
Gazette, JP-A-4-118020, etc.).
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな被処理ガス浄化装置は、比較的中小規模の施設に使
われることが多く、又、既設の設備に追加する例が多い
ので、装置が小型且つ安価である必要がある。しかし、
上記の吸着処理と触媒酸化処理を組み合わせた被処理ガ
ス浄化装置では、吸着処理における吸着層間の切換えや
触媒酸化処理における反応器へのバルブ接続等複雑な操
作が必要で、且つ配管系統が複雑で大型であり、且つ装
置の設置費用やコスト低減等の問題があった。However, such an apparatus for purifying gas to be treated is often used in relatively small and medium-sized facilities, and is often added to existing equipment, so that the apparatus is small in size. And it needs to be cheap. But,
In the target gas purification apparatus that combines the adsorption treatment and the catalytic oxidation treatment described above, complicated operations such as switching between the adsorption layers in the adsorption treatment and valve connection to the reactor in the catalytic oxidation treatment are required, and the piping system is complicated. It is large in size, and there are problems such as installation cost of the device and cost reduction.
【０００５】本発明の目的は、産業施設から発生する被
処理ガス中の有毒もしくは悪臭等の有害物質を簡単な装
置で確実、容易に除去することが出来、且つ装置が小型
で経済的な被処理ガス浄化装置を提供することである。An object of the present invention is to remove harmful substances such as poisonous or malodorous substances in a gas to be treated generated from an industrial facility reliably and easily with a simple device, and the device is small and economical. An object of the present invention is to provide a treated gas purification device.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明は、被処理ガス中の有害物質を吸着し、加熱
によって該吸着した有害物質を分離させる加熱手段を有
する少なくとも二つ以上の吸着層と、該吸着層から分離
された前記有害物質を酸化する触媒層とを備えた被処理
ガス浄化装置において、前記二つ以上の吸着層は、直列
に配置されたものである。In order to achieve the above object, the present invention has at least two or more heating means for adsorbing a harmful substance in a gas to be treated and for separating the adsorbed harmful substance by heating. In the apparatus for purifying a gas to be treated, which comprises an adsorption layer and a catalyst layer for oxidizing the harmful substance separated from the adsorption layer, the two or more adsorption layers are arranged in series.
【０００７】更に、上記発明において、前記直列に配置
され隣接する吸着層間の少なくとも１個所に前記被処理
ガスの浄化されたガスを放出する切換手段が設けられた
ものである。Further, in the above invention, the switching means for releasing the purified gas of the gas to be treated is provided at least at one position between the adsorbing layers arranged in series and adjacent to each other.
【０００８】更に、上記いずれかの発明において、前記
切換手段は、該切換手段の切換部を迂回する分岐通路を
有するものである。Further, in any one of the above-mentioned inventions, the switching means has a branch passage bypassing a switching portion of the switching means.
【０００９】そして、上記いずれかの発明において、前
記触媒層は、前記吸着層から分離された有害物質の酸化
を促進する予熱手段によって予熱可能なものである。In any one of the above inventions, the catalyst layer can be preheated by a preheating means for promoting the oxidation of the harmful substance separated from the adsorption layer.
【００１０】[0010]
【作用】本発明によれば、二つ以上の吸着層は直列に配
置されたもので、被処理ガス中の有害物質は、二つ以上
の吸着層によって効率良く確実に吸着され、簡単な装置
で確実、容易に除去される。According to the present invention, the two or more adsorption layers are arranged in series, and the harmful substances in the gas to be treated are efficiently and surely adsorbed by the two or more adsorption layers, so that a simple apparatus can be used. Surely and easily removed.
【００１１】更に、上記発明において、直列に配置され
隣接する吸着層間の少なくとも１個所に被処理ガスの浄
化されたガスを放出する切換手段が設けられたもので、
上記発明の作用に加え、切換手段を操作することによっ
て、切換手段の上流側に位置する吸着層と、切換手段の
下流側に位置する吸着層との間で、この被処理ガス浄化
装置を停止することなく吸着層の再生を確実、容易に行
なうことが出来る。Further, in the above invention, the switching means for releasing the purified gas of the gas to be treated is provided at least at one position between the adsorbing layers arranged in series and adjacent to each other,
In addition to the operation of the invention described above, by operating the switching means, the device for purifying the gas to be treated is stopped between the adsorption layer located upstream of the switching means and the adsorption layer located downstream of the switching means. It is possible to surely and easily regenerate the adsorption layer without doing so.
【００１２】更に、上記いずれかの発明において、切換
手段は、この切換手段の切換部を迂回する分岐通路を有
するもので、切換手段の下流側に位置する吸着層から分
離された有害物質を触媒層によって除去する際に、被処
理ガスの一部がこのバイパスを通って下流側に流れるの
で、効率良く速やかに有害物質を分離、除去することが
出来る。Further, in any one of the above inventions, the switching means has a branch passage bypassing the switching part of the switching means, and the harmful substance separated from the adsorption layer located downstream of the switching means is catalyzed. When the gas is removed by the layer, a part of the gas to be processed flows through the bypass to the downstream side, so that the harmful substance can be efficiently and promptly separated and removed.
【００１３】そして、上記いずれかの発明において、触
媒層は、吸着層から分離された有害物質の酸化を促進す
る予熱手段によって予熱可能なもので、上記いずれかの
発明の作用に加え、触媒が予熱されることにより触媒層
における触媒作用が向上する。In any one of the above inventions, the catalyst layer can be preheated by a preheating means for promoting the oxidation of the harmful substances separated from the adsorption layer. Preheating improves the catalytic action in the catalyst layer.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１５】図１は、本発明に係る被処理ガス浄化装置
の一実施例を示す系統図である。本実施例の被処理ガス
浄化装置１は、被処理ガス２０中の有害物質を吸着し、
加熱によって、この吸着した有害物質を分離させる加熱
手段である電気ヒータ５ａ〜５ｄを有する四つの吸着層
３ａ〜３ｄと、この吸着層３ａ〜３ｄから分離された有
害物質を酸化する触媒層１３とを備えたものである。四
つの吸着層３ａ〜３ｄは、直列に配置され、隣接する吸
着層５ａ、５ｂ間に、被処理ガスの浄化されたガス２１
ａを放出する切換手段である流路切換装置８が設けられ
ている。FIG. 1 is a system diagram showing an embodiment of the apparatus for purifying gas to be treated according to the present invention. The to-be-processed gas purification apparatus 1 of this embodiment adsorbs harmful substances in the to-be-processed gas 20,
Four adsorption layers 3a to 3d having electric heaters 5a to 5d which are heating means for separating the adsorbed harmful substance by heating, and a catalyst layer 13 for oxidizing the harmful substance separated from the adsorbent layers 3a to 3d. It is equipped with. The four adsorption layers 3a to 3d are arranged in series, and between the adjacent adsorption layers 5a and 5b, the purified gas 21 of the gas to be treated is provided.
A flow path switching device 8 which is a switching means for discharging a is provided.
【００１６】更に、流路切換装置８は、この流路切換装
置８の切換部９を迂回する分岐通路１０を有するもので
ある。そして、触媒層１３は、吸着層３ａ〜３ｄから分
離された有害物質の酸化を促進する予熱手段である予熱
バーナ１４によって予熱可能なもので、触媒層１３と予
熱バーナ１４は反応器１２を構成する。Further, the flow passage switching device 8 has a branch passage 10 that bypasses the switching portion 9 of the flow passage switching device 8. Then, the catalyst layer 13 can be preheated by a preheating burner 14 which is a preheating means for promoting the oxidation of the harmful substances separated from the adsorption layers 3a to 3d, and the catalyst layer 13 and the preheating burner 14 constitute the reactor 12. To do.
【００１７】次に、本実施例の被処理ガス浄化装置１の
構造について、更に詳しく説明する。図１において、被
処理ガス浄化装置１の各吸着層３ａ〜３ｄは、電気ヒー
タ５ａ〜５ｄを有し、導入管１６からファン１７に導入
された被処理ガス１の流れに対し直列に配置され、各吸
着層３ａ〜３ｄは電気ヒータ５ａ〜５ｄにより独立に１
２０℃まで加熱することが可能である。最上流に位置す
る吸着層３ａと次に位置する吸着層３ｂの間には流路切
換装置８が配置されており、この流路切換装置８の切換
部９を操作することによって吸着層３ａを通過した被処
理ガス２０の浄化されたガスの一部２１ａを直接装置外
に放出したり、吸着層３ｂ〜３ｄへ流したり任意に選択
出来る。Next, the structure of the target gas purification apparatus 1 of this embodiment will be described in more detail. In FIG. 1, each of the adsorption layers 3a to 3d of the target gas purification apparatus 1 has electric heaters 5a to 5d and is arranged in series with respect to the flow of the target gas 1 introduced from the introduction pipe 16 into the fan 17. , Each of the adsorption layers 3a to 3d is independently set by the electric heaters 5a to 5d.
It is possible to heat up to 20 ° C. A flow path switching device 8 is arranged between the adsorption layer 3a located on the most upstream side and the adsorption layer 3b located next, and by operating the switching part 9 of this flow path switching device 8, the adsorption layer 3a is removed. A portion 21a of the purified gas of the processed gas 20 that has passed can be directly discharged to the outside of the apparatus or flown to the adsorption layers 3b to 3d.
【００１８】更に、流路切換装置８は、分岐通路１０を
有しており、吸着層３ａを通過したガス流量の４０％は
常に吸着層３ｂ〜３ｄへ流れる。吸着層３ｄの下流側に
は通過ガスを２５０℃まで加熱出来る予熱バーナ１４が
設けられ、予熱バーナ１４に点火すると、加熱された通
過ガス中の可燃性有害物質は触媒層１３で酸化燃焼し、
浄化されたガス２１ｂとして装置外、この場合は大気へ
放出される。Further, the flow path switching device 8 has a branch passage 10, and 40% of the gas flow rate passing through the adsorption layers 3a always flows to the adsorption layers 3b to 3d. A preheating burner 14 capable of heating the passing gas to 250 ° C. is provided on the downstream side of the adsorption layer 3d. When the preheating burner 14 is ignited, the combustible harmful substance in the heated passing gas is oxidized and burned in the catalyst layer 13,
The purified gas 21b is released outside the apparatus, in this case to the atmosphere.
【００１９】図２は、図１の実施例に用いた吸着層の分
解斜視図である。吸着層３は、被処理ガス２０の有害物
質を吸着するハニカム形吸着剤４と、このハニカム形吸
着剤４を覆うシート状電気ヒータ５と、更にその外側を
覆うシート状断熱材６とからなる。ハニカム形吸着剤４
は、被処理ガス流路に対する断面形状が７５ｍｍ角で流
路長さが１５０ｍｍ、被処理ガス流路の断面積１ｉｎ2
当り約２００のハニカム状の小流路を有するセラミック
ペーパのハニカム基材を用い、その表面にペンタシル型
ゼオライトを約１００ｇ／Ｌ（Ｌはリットルを表す）コ
ートしたものである。ペンタシル型ゼオライトをコート
したハニカム形吸着剤４の外側にはシート状電気ヒータ
５を巻いたものを４個合わせ全体をシート状断熱材６で
巻いて１組としたものを吸着層３として用いる。FIG. 2 is an exploded perspective view of the adsorption layer used in the embodiment of FIG. The adsorption layer 3 includes a honeycomb-shaped adsorbent 4 that adsorbs harmful substances of the gas to be treated 20, a sheet-shaped electric heater 5 that covers the honeycomb-shaped adsorbent 4, and a sheet-shaped heat insulating material 6 that further covers the outside thereof. . Honeycomb adsorbent 4
Has a cross-sectional shape of 75 mm square with respect to the gas flow path to be processed, a flow path length of 150 mm, and a cross-sectional area of the gas flow path to be processed of 1 in 2
A honeycomb base material of ceramic paper having about 200 honeycomb-shaped small channels is used, and the surface thereof is coated with about 100 g / L (L represents liter) of pentasil-type zeolite. On the outside of the honeycomb-type adsorbent 4 coated with pentasil-type zeolite, four sheet-shaped electric heaters 5 are combined and the whole sheet is wound with a sheet-shaped heat insulating material 6 to form one set as the adsorption layer 3.
【００２０】触媒層１３は、有害物質の燃焼時にＳＶ
（空間速度）が３０，０００／ｈになるように、被処理
ガス流路に対する断面形状が１５０ｍｍ角で流路長さが
２３ｍｍであり、被処理ガス流路の断面積１ｉｎ2当り
約３００の小流路を含むコーディェライト製ハニカム基
材の表面に約１００ｇ／Ｌの活性アルミナをコートした
後、Ｐｔ換算で０.５ｇ／Ｌの白金を担持したものを用
いる。The catalyst layer 13 is SV when burning harmful substances.
The cross-sectional shape with respect to the gas flow path to be processed is 150 mm square and the flow path length is 23 mm so that the (space velocity) is 30,000 / h, and the cross-sectional area of the gas flow path to be processed is about 300 per 1 in 2 . The surface of a cordierite honeycomb substrate containing small channels is coated with about 100 g / L of activated alumina, and then 0.5 g / L of platinum as Pt is supported.
【００２１】尚、吸着層３及び触媒層１３のハニカム基
材は、その材質、形状及び寸法を上記実施例のものに限
るものではない。吸着層３及び触媒層１３の断面形状
は、ハニカム状だけでなく、装置の使用条件によっては
粒状、破砕粒、粉末等でもよい。吸着層３ａと３ｂの間
の流路切換装置８についても同様に図１に示したダンパ
形式のものに限るものではなく、使用条件に応じて適し
たものを選ぶことが出来る。The honeycomb base material of the adsorption layer 3 and the catalyst layer 13 is not limited to the material, shape and size of those in the above-mentioned embodiment. The cross-sectional shapes of the adsorption layer 3 and the catalyst layer 13 are not limited to a honeycomb shape, and may be granular, crushed particles, powder, or the like depending on the usage conditions of the device. Similarly, the flow path switching device 8 between the adsorption layers 3a and 3b is not limited to the damper type shown in FIG. 1, and a suitable one can be selected according to the usage conditions.
【００２２】次に、本実施例に係る被処理ガス浄化装置
１の作用を説明する。可燃性の有害物質を含む被処理ガ
ス２０に対し直列に電気ヒータ５ａ〜５ｄを有する吸着
層３ａ〜３ｄを配置し、被処理ガス２０を流すと被処理
ガス２０中の有害物質は、先ず、吸着層３ａに吸着され
浄化される。運転時間が経過すると吸着層３ａから次第
に吸着能が飽和し浄化能力が低下するので、下流の吸着
層３ｂ乃至３ｄ、特に吸着層３ｄの吸着能が飽和する前
に吸着層３ａに吸着された有害物質の分離を行ない、吸
着層３ａの再生操作を行なう。吸着層３ａの再生操作
は、電気ヒータ５ａで吸着層３ａを加熱することによっ
て行なう。Next, the operation of the to-be-processed gas purification apparatus 1 according to this embodiment will be described. When the adsorption layers 3a to 3d having the electric heaters 5a to 5d are arranged in series with respect to the gas to be treated 20 containing the combustible harmful substance, and the gas to be treated 20 is flowed, the harmful substances in the gas to be treated 20 are It is adsorbed on the adsorption layer 3a and purified. As the adsorbing capacity is gradually saturated from the adsorbing layer 3a and the purifying capacity is lowered with the lapse of the operating time, the adsorbing layer 3a downstream of the adsorbing layer 3a, particularly the adsorbing layer 3a is adsorbed by the adsorbing layer 3a before the adsorbing capacity is saturated. The substances are separated and the adsorption layer 3a is regenerated. The regeneration operation of the adsorption layer 3a is performed by heating the adsorption layer 3a with the electric heater 5a.
【００２３】吸着層３ａから分離した有害物質及び流入
してくる被処理ガスの有害物質は、吸着層３ｂ〜３ｄに
吸着させ、被処理ガス浄化装置１から有害物質が流出す
ることを防止する。この際、下流側の吸着層ほど吸着能
が飽和する時間が長くなり、吸着層３ｄの吸着能が時間
的に持続する。The harmful substances separated from the adsorption layer 3a and the harmful substances of the inflowing gas to be treated are adsorbed on the adsorption layers 3b to 3d to prevent the harmful substances from flowing out from the gas purification apparatus 1 to be treated. At this time, the adsorption capacity of the adsorption layer on the downstream side becomes longer, and the adsorption capacity of the adsorption layer 3d lasts with time.
【００２４】吸着層３ａの吸着能力が回復した時点、即
ち吸着能が再生した時点で吸着層３ｂ〜３ｄに吸着した
有害物質の分離を行ない、吸着能の再生を行なう。この
時、予熱バーナ１４を作動させ、各吸着層３ｂ〜３ｄか
ら分離し濃縮された有害物質を加熱した後、触媒層１３
で酸化燃焼し除去する。吸着層３ｂ〜３ｄの再生時に導
入管１６から導入される有害物質は、吸着層３ａに吸着
させ、浄化されたガス２１ａは流路切換装置８から大部
分装置外に放出される。When the adsorption capacity of the adsorption layer 3a is recovered, that is, when the adsorption capacity is regenerated, the harmful substances adsorbed on the adsorption layers 3b to 3d are separated to regenerate the adsorption capacity. At this time, the preheating burner 14 is operated to heat the harmful substances separated and condensed from the adsorption layers 3b to 3d, and then the catalyst layer 13
It is oxidized and burned with. The harmful substances introduced from the introduction pipe 16 at the time of regenerating the adsorption layers 3b to 3d are adsorbed to the adsorption layer 3a, and the purified gas 21a is discharged from the flow path switching device 8 to the outside of the device in most cases.
【００２５】次に、被処理ガスがトルエンの場合につい
て被処理ガス浄化装置１の試験運転を行なった結果を説
明する。１００ｐｐｍのトルエンを含む空気の被処理ガ
ス２０を被処理ガス浄化装置１に８０ｍ3／ｈの流量で
供給し、連続運転を行なった。運転開始直後は、各吸着
層３ａ〜３ｄのトルエン吸着能が高いので被処理ガス２
０中のトルエンは各吸着層３ａ〜３ｄで吸着除去され、
点火していない予熱バーナ１４及び触媒層１３をそのま
ま通過して装置外、即ちこの場合、外気に放出される。Next, the results of the test operation of the to-be-treated gas purifying apparatus 1 when the to-be-treated gas is toluene will be described. The to-be-processed gas 20 of air containing 100 ppm of toluene was supplied to the to-be-processed gas purification apparatus 1 at a flow rate of 80 m 3 / h, and continuous operation was performed. Immediately after the start of the operation, each of the adsorption layers 3a to 3d has a high toluene adsorption capacity, so that the gas to be treated 2
Toluene in 0 is adsorbed and removed by each of the adsorption layers 3a to 3d,
It passes through the preheated burner 14 and the catalyst layer 13 which are not ignited as they are, and is discharged to the outside of the apparatus, that is, the outside air in this case.
【００２６】運転を３時間ほど継続すると、上流側の吸
着層３ａから吸着層３ｂまでトルエンの吸着能が飽和す
るので、電気ヒータ５ａに通電して吸着層３ａに吸着し
たトルエンの分離を行なう。このとき吸着層３ａから分
離したトルエンと流入してくる被処理ガス２０中のトル
エンは、吸着層３ｃ、３ｄで吸着除去されることになる
ので、導出管１８からトルエンが排出されない。When the operation is continued for about 3 hours, since the adsorption capacity of toluene is saturated from the adsorption layer 3a on the upstream side to the adsorption layer 3b, the electric heater 5a is energized to separate the toluene adsorbed on the adsorption layer 3a. At this time, the toluene separated from the adsorption layer 3a and the toluene in the gas to be treated 20 flowing in are adsorbed and removed by the adsorption layers 3c and 3d, so that the toluene is not discharged from the outlet pipe 18.
【００２７】吸着層３ａのトルエンの分離操作が終了し
たら、電気ヒータ５ａの通電を停止し冷却する。この結
果、吸着層３ａの吸着能が回復したので、流路切換装置
８の切換部９を作動させ吸着層３ａで浄化されたガスの
６０％を排出管１１から装置外に放出する。次に、吸着
層３ｂ〜３ｄの電気ヒータ５ｂ〜５ｄに通電して吸着層
３ｂ〜３ｄの吸着したトルエンの分離操作を行なうと共
に、予熱バーナ１４を点火する。吸着層３ａから分岐通
路１０を通過した浄化されたガスの残りの４０％は、吸
着層３ｂ〜３ｄから分離したトルエンで濃度が高まり、
トルエン濃度が１，０００ｐｐｍから１，５００ｐｐｍ
のガスとなり、２５０℃に加熱されて触媒層１３で燃焼
する。When the operation for separating toluene from the adsorption layer 3a is completed, the electric heater 5a is deenergized and cooled. As a result, since the adsorption capacity of the adsorption layer 3a is recovered, 60% of the gas purified by the adsorption layer 3a is discharged to the outside of the apparatus by operating the switching unit 9 of the flow path switching device 8. Next, the electric heaters 5b to 5d of the adsorption layers 3b to 3d are energized to separate the adsorbed toluene of the adsorption layers 3b to 3d and the preheating burner 14 is ignited. The remaining 40% of the purified gas that has passed through the branch passage 10 from the adsorption layer 3a has a higher concentration due to toluene separated from the adsorption layers 3b to 3d,
Toluene concentration is 1,000ppm to 1,500ppm
Gas, which is heated to 250 ° C. and burned in the catalyst layer 13.
【００２８】吸着層３ｂ〜３ｄのトルエンの分離が終了
したら電気ヒータ５ｂ〜５ｄ及び予熱バーナ１４を停止
し、流路切換装置８を作動させて被処理ガス２０が吸着
層３ｂ〜３ｄの方へ流れるようにする。３０分間の吸着
層３ａの再生操作と３０分間の吸着層３ｂ〜３ｄの再生
操作を３時間おきに繰返して実施例の被処理ガス浄化装
置１は、被処理ガス２０のトルエンを連続的に除去す
る。このように、本実施例の被処理ガス浄化装置１は、
流路切換装置８が一つの単純な構造であり、被処理ガス
２０中の可燃性有害物質を、この被処理ガス浄化装置１
を停止することなく連続的に処理することが出来る。When the separation of the toluene in the adsorption layers 3b to 3d is completed, the electric heaters 5b to 5d and the preheating burner 14 are stopped, the flow path switching device 8 is operated, and the gas to be treated 20 is directed toward the adsorption layers 3b to 3d. Let it flow. By repeating the operation of regenerating the adsorption layer 3a for 30 minutes and the operation of regenerating the adsorption layers 3b to 3d for 30 minutes every 3 hours, the treated gas purification apparatus 1 of the embodiment continuously removes toluene of the treated gas 20. To do. As described above, the treated gas purification apparatus 1 of the present embodiment is
The flow path switching device 8 has one simple structure, and the combustible harmful substances in the gas to be treated 20 are removed from the gas to be treated 1
Can be continuously processed without stopping.
【００２９】図３は、図１の実施例に比較される比較例
の被処理ガス浄化装置２を示し、（Ａ）は系統図、
（Ｂ）は（Ａ）の排出管の部分平面図である。比較例の
被処理ガス浄化装置２の吸着層３ａ〜３ｄは、それ自体
としては実施例と同じ構造、作用のものである。被処理
ガス２０の流れに対して、吸着層３ａ〜３ｄは、４個並
列に配置されている。各吸着層３ａ〜３ｄは、それぞれ
流路切換装置８ａ〜８ｄが設けられ、吸着層３ａ〜３ｄ
を通過した浄化されたガス２１ａは、そのまま外気へ放
出されるか、或いは予熱バーナ１４と触媒層１３を格納
した反応器１２に流れるかの切り換えが可能に形成され
ている。FIG. 3 shows a treated gas purifying apparatus 2 of a comparative example compared with the embodiment of FIG. 1, (A) is a system diagram,
(B) is a partial plan view of the discharge pipe of (A). The adsorption layers 3a to 3d of the to-be-treated gas purifying apparatus 2 of the comparative example have the same structure and operation as those of the embodiment. Four adsorption layers 3a to 3d are arranged in parallel with respect to the flow of the gas to be treated 20. The adsorption layers 3a to 3d are provided with flow path switching devices 8a to 8d, respectively.
The purified gas 21a that has passed through is switched to be released to the outside air as it is or to flow to the reactor 12 containing the preheating burner 14 and the catalyst layer 13.
【００３０】図３（Ａ）、（Ｂ）に図示した排出管の状
態は、流路切換装置８ａ〜８ｃの切換部９ａ〜９ｃが反
応器１２に対して閉の状態、流路切換装置８ｄの切換部
９ｄが反応器１２に対して開の状態を示している。従っ
て、吸着層３ａ〜３ｃによって浄化されたガス２１ａ
は、排出管１１から外気に放出される。吸着層３ｄを通
過したガスは、反応器１２の触媒層１３を通過して導出
管１８から外気に放出される。In the state of the discharge pipe shown in FIGS. 3A and 3B, the switching portions 9a to 9c of the flow passage switching devices 8a to 8c are closed with respect to the reactor 12, and the flow passage switching device 8d. The switching part 9d of FIG. Therefore, the gas 21a purified by the adsorption layers 3a to 3c
Are released from the exhaust pipe 11 to the outside air. The gas that has passed through the adsorption layer 3d passes through the catalyst layer 13 of the reactor 12 and is discharged from the outlet pipe 18 to the outside air.
【００３１】使用した触媒層１３は、実施例と同様に有
害物質の燃焼時にＳＶが３０,０００／ｈになるよう
に、被処理ガス流路の断面形状が１５０ｍｍ角で流路長
さが３０ｍｍであり、被処理ガス流路の断面積１ｉｎ2
当り約３００の小流路を含むコーディェライト製のハニ
カム基材の表面に約１００ｇ／Ｌの活性アルミナをコー
トした後、Ｐｔ換算で０.５ｇ／Ｌの白金を担持させた
ものを用いている。反応器１２の予熱バーナ１４を作動
させると、反応器１２に流入したガスは２５０℃まで加
熱され、ガス中の有害物質は触媒層１３で酸化燃焼し、
除去される。反応器１２で浄化されたガス２１ｂは外気
へ放出される。In the catalyst layer 13 used, the cross-sectional shape of the flow path of the gas to be treated is 150 mm square and the flow path length is 30 mm so that the SV becomes 30,000 / h when the harmful substances are burned, as in the embodiment. And the cross-sectional area of the gas flow path to be treated is 1 in 2
The surface of a honeycomb base made of cordierite containing about 300 small channels is coated with about 100 g / L of activated alumina, and then 0.5 g / L of platinum as Pt is supported. . When the preheating burner 14 of the reactor 12 is operated, the gas flowing into the reactor 12 is heated to 250 ° C., and the harmful substances in the gas are oxidized and burned in the catalyst layer 13,
To be removed. The gas 21b purified in the reactor 12 is released to the outside air.
【００３２】次に、被処理ガスがトルエンの場合につい
て比較例の被処理ガス浄化装置２の試験運転を行なった
結果を説明する。運転条件は上記の実施例の場合と同じ
であって、運転開始直後は、各吸着層３ａ〜３ｄのトル
エン吸着能が高いので被処理ガス２０中のトルエンは各
吸着層３ａ〜３ｄで吸着され、浄化されたガス２１ａ
は、流路切換装置８ａ〜８ｄを介して外気に放出され
る。運転開始から３時間経過すると、吸着層３ａ〜３ｄ
の吸着能が飽和してくるが、例えば、吸着層３ｄの吸着
能が最初に飽和したとすると、この吸着層３ｄを最初に
再生処理を行なう。吸着層３ａ〜３ｄの内、どの吸着層
から飽和するかは、通常流路切換装置８ａ〜８ｄによる
作動手順による。Next, the results of the test operation of the treated gas purifying apparatus 2 of the comparative example when the treated gas is toluene will be described. The operating conditions are the same as in the case of the above-described embodiment, and immediately after the start of operation, the toluene adsorption capacity of each of the adsorption layers 3a to 3d is high, so that the toluene in the gas to be treated 20 is adsorbed by each of the adsorption layers 3a to 3d. , Purified gas 21a
Is discharged to the outside air via the flow path switching devices 8a to 8d. After 3 hours from the start of operation, the adsorption layers 3a to 3d
However, if the adsorption capacity of the adsorption layer 3d is saturated first, the adsorption layer 3d is first regenerated. Which of the adsorption layers 3a to 3d becomes saturated depends on the operation procedure of the normal flow path switching devices 8a to 8d.
【００３３】この図３の場合、流路切換装置８ｄを作動
させて吸着層３ｄ出口を反応器１２に接続し、予熱バー
ナ１４を点火した後吸着層３ｄの電気ヒータ５ｄを通電
する。吸着層３ｄの温度が上昇すると吸着していたトル
エンは分離され、被処理ガス２０の一部と共に反応器１
２に入り、２５０℃に予熱されて触媒層１３で酸化燃焼
する。トルエンが除去され浄化されたガス２１ｂは外気
に放出される。このとき吸着層３ｄに流入する被処理ガ
ス２０の流量は、全流量の１／４となり、反応器１２に
入るガスのトルエン濃度は４５０ｐｐｍから６００ｐｐ
ｍとなる。In the case of FIG. 3, the flow path switching device 8d is operated to connect the outlet of the adsorption layer 3d to the reactor 12, ignite the preheating burner 14 and then energize the electric heater 5d of the adsorption layer 3d. When the temperature of the adsorption layer 3d rises, the adsorbed toluene is separated and a part of the gas to be treated 20 and the reactor 1 are separated.
2, it is preheated to 250 ° C. and oxidatively burns in the catalyst layer 13. The gas 21b purified by removing the toluene is released to the outside air. At this time, the flow rate of the gas to be treated 20 flowing into the adsorption layer 3d is ¼ of the total flow rate, and the toluene concentration of the gas entering the reactor 12 is 450 ppm to 600 pp.
m.
【００３４】吸着層３ｄのトルエンの分離が終了したら
電気ヒータ５ｄを切り、吸着層３ｄを冷却する。３０分
間の再生操作の結果、吸着層３ｄのトルエン吸着能が回
復したら予熱バーナ１４を停止し流路切換装置８ｄを作
動させ吸着層３ｄの出口を外気に直結する。この動作を
吸着層３ａ、３ｂ、３ｃと順に繰り返すことによって、
比較例の被処理ガス浄化装置２は、被処理ガス２０のト
ルエンを連続的に除去する。When the toluene in the adsorption layer 3d has been separated, the electric heater 5d is turned off to cool the adsorption layer 3d. As a result of the regenerating operation for 30 minutes, when the toluene adsorption capacity of the adsorption layer 3d is recovered, the preheating burner 14 is stopped and the flow path switching device 8d is operated to directly connect the outlet of the adsorption layer 3d to the outside air. By repeating this operation in order for the adsorption layers 3a, 3b, 3c,
The to-be-processed gas purification apparatus 2 of a comparative example removes toluene of the to-be-processed gas 20 continuously.
【００３５】表１は、本実施例の被処理ガス浄化装置１
と比較例の被処理ガス浄化装置２の性能について比較し
たものである。表１において、実施例の各比較項目の値
は、比較例の各比較項目の値を１００（％）とした場合
の値（％）を示す。制御盤とダクトを除いた装置の大き
さの内、容積は比較例１００に対して約３６、床面積は
比較例１００に対して４０となり、これらから実施例の
被処理ガス浄化装置１は、小型化されていることが分か
る。これは、実施例の被処理ガス浄化装置１は、流路切
換装置８が１個で済み配管系が単純であるのに対して、
比較例の被処理ガス浄化装置２は、流路切換装置８が４
個必要であり、吸着層を並列に設置して被処理ガスを流
すため被処理ガス浄化装置２が横に広がるためである。Table 1 shows the target gas purifying apparatus 1 of this embodiment.
And the performance of the target gas purification apparatus 2 of the comparative example. In Table 1, the value of each comparative item of the example shows the value (%) when the value of each comparative item of the comparative example is 100 (%). Of the size of the apparatus excluding the control panel and the duct, the volume is about 36 for Comparative Example 100, and the floor area is 40 for Comparative Example 100. From these, the treated gas purification apparatus 1 of the example is You can see that it has been miniaturized. This is because the to-be-processed gas purification apparatus 1 of the embodiment has only one flow path switching device 8 and the piping system is simple.
In the processed gas purification apparatus 2 of the comparative example, the flow path switching device 8 is 4
This is because the treatment target gas purifying device 2 spreads laterally since the adsorption layers are installed in parallel and the treatment gas flows.
【００３６】実施例の被処理ガス浄化装置１は、吸着層
から分離したトルエンの濃度を１，０００ｐｐｍ以上に
高くして自燃させることが出来るため、予熱バーナの作
動時間は、触媒層が反応温度に達するまでの１０分間程
度でよい。これに対し比較例の被処理ガス浄化装置２
は、有害物質のトルエン濃度が５５０ｐｐｍ前後で自燃
しないので吸着剤の再生中は予熱バーナの燃焼を継続す
る必要がある。更に、実施例の被処理ガス浄化装置１
は、吸着剤の再生は３時間毎に１回であるが、比較例の
被処理ガス浄化装置２は、吸着能が飽和した吸着層を逐
次再生していくので、３時間の一周期で２時間近く予熱
バーナを作動させる必要がある。従って、実施例の被処
理ガス浄化装置１の単位運転時間当りの燃料費は、比較
例のそれの１０％で、非常に小さい。In the target gas purification apparatus 1 of the embodiment, since the concentration of toluene separated from the adsorption layer can be increased to 1,000 ppm or more to cause self-combustion, the operating time of the preheating burner depends on the reaction temperature of the catalyst layer. It takes about 10 minutes to reach. On the other hand, the to-be-processed gas purification apparatus 2 of a comparative example
As the harmful substance has a toluene concentration of around 550 ppm and does not self-combust, it is necessary to continue the combustion of the preheating burner during regeneration of the adsorbent. Furthermore, the treated gas purification apparatus 1 of the embodiment
The regeneration of the adsorbent is performed once every three hours, but since the treated gas purification apparatus 2 of the comparative example successively regenerates the adsorption layer with saturated adsorption capacity, it is possible to regenerate two times in one cycle of three hours. It is necessary to operate the preheating burner for near time. Therefore, the fuel cost per unit operating time of the treated gas purification apparatus 1 of the example is 10% of that of the comparative example, which is very small.
【００３７】更に、実施例の被処理ガス浄化装置１は、
有害物質の流量を小さく出来るので同じ燃焼性能を得る
のに比較例の場合の約７５％の触媒量で済む。又、比較
例の被処理ガス浄化装置２は、有害物質のトルエン濃度
を高めるためにトルエンの分離時に吸着層に流入してく
る被処理ガスの流量を減らす必要があり、このような被
処理ガス浄化装置２を付けると構造が複雑になって被処
理ガス浄化装置の価格が上昇する問題があり、実施例の
被処理ガス浄化装置１の製造価格は、比較例のそれの約
６０％程度になり、経済的である。Further, the apparatus for purifying gas to be treated 1 of the embodiment is
Since the flow rate of the harmful substance can be reduced, the same combustion performance can be obtained with a catalytic amount of about 75% of that of the comparative example. Further, in the treated gas purifying apparatus 2 of the comparative example, it is necessary to reduce the flow rate of the treated gas flowing into the adsorption layer during the separation of toluene in order to increase the concentration of the harmful substance toluene. If the purifying device 2 is attached, there is a problem that the structure becomes complicated and the price of the treated gas purifying device rises, and the manufacturing price of the treated gas purifying device 1 of the embodiment is about 60% of that of the comparative example. It is economical.
【００３８】[0038]
【表１】 [Table 1]
【００３９】[0039]
【発明の効果】本発明によれば、二つ以上の吸着層は直
列に配置されたもので、被処理ガス中の有害物質は、二
つ以上の吸着層によって効率良く確実に吸着され、簡単
な装置で容易に除去される。According to the present invention, two or more adsorption layers are arranged in series, and harmful substances in the gas to be treated are efficiently and surely adsorbed by the two or more adsorption layers, which is simple and easy. It is easily removed by various devices.
【００４０】更に、上記発明において、吸着層間の少な
くとも１個所に被処理ガスの浄化されたガスを放出する
切換手段が設けられたもので、上記発明の効果に加え、
切換手段の上流側に位置する吸着層と切換手段の下流側
に位置する吸着層との間で、切換手段を切り替えること
によって、この被処理ガス浄化装置を停止することなく
両吸着層に吸着された有害物質を分離して吸着能を回復
させ、再使用を行なうことが出来る。Further, in the above invention, the switching means for releasing the purified gas of the gas to be treated is provided at least at one position between the adsorption layers, and in addition to the effects of the above invention,
By switching the switching means between the adsorption layer located on the upstream side of the switching means and the adsorption layer located on the downstream side of the switching means, the gas to be treated is adsorbed on both adsorption layers without stopping. It can be reused by separating the harmful substances that have been recovered and recovering the adsorption capacity.
【００４１】更に、上記いずれかの発明において、切換
手段は、分岐通路を有するもので、上記発明の効果に加
え、切換手段の下流側に位置する吸着層から効率良く速
やかに有害物質を分離、除去することが出来る。Further, in any one of the above inventions, the switching means has a branch passage, and in addition to the effects of the above invention, harmful substances are efficiently and promptly separated from the adsorption layer located on the downstream side of the switching means, It can be removed.
【００４２】そして、上記いずれかの発明において、触
媒層は、予熱手段を有するもので、上記いずれかの発明
の効果に加え、触媒が予熱されることにより触媒層にお
ける有害物質の分離が確実、速やかに行なわれ、触媒機
能の回復力が向上する。In any one of the above inventions, the catalyst layer has a preheating means, and in addition to the effect of any one of the above inventions, the catalyst is preheated to ensure separation of harmful substances in the catalyst layer. It is carried out promptly and the recovery of the catalytic function is improved.
【図１】本発明に係る被処理ガス浄化装置の一実施例を
示す系統図である。FIG. 1 is a system diagram showing an embodiment of a processed gas purification apparatus according to the present invention.
【図２】図１の実施例に用いた吸着層の分解斜視図であ
る。FIG. 2 is an exploded perspective view of an adsorption layer used in the embodiment of FIG.
【図３】図１の実施例に比較される比較例の被処理ガス
浄化装置を示し、（Ａ）は系統図、（Ｂ）は（Ａ）の排
出管の部分平面図である。3A and 3B show a processed gas purification apparatus of a comparative example compared with the embodiment of FIG. 1, FIG. 3A is a system diagram, and FIG. 3B is a partial plan view of an exhaust pipe of FIG.
１ 被処理ガス浄化装置 ３、３ａ〜３ｄ 吸着層 ５、５ａ〜５ｄ 電気ヒータ（加熱手段） ８ 流路切替装置（切替手段） ９ 切替部 １０ 分岐通路 １３ 触媒層 １４ 予熱バーナ（予熱手段） ２０ 被処理ガス ２１ａ、２１ｂ 浄化されたガス DESCRIPTION OF SYMBOLS 1 Processed gas purification apparatus 3, 3a-3d Adsorption layer 5, 5a-5d Electric heater (heating means) 8 Flow path switching device (switching means) 9 Switching part 10 Branch passage 13 Catalyst layer 14 Preheating burner (preheating means) 20 Gas to be treated 21a, 21b Purified gas
Claims (4)
によって該吸着した有害物質を分離させる加熱手段を有
する少なくとも二つ以上の吸着層と、該吸着層から分離
された前記有害物質を酸化する触媒層とを備えた被処理
ガス浄化装置において、前記二つ以上の吸着層は、直列
に配置されたものであることを特徴とする被処理ガス浄
化装置。1. At least two or more adsorption layers having a heating means for adsorbing a harmful substance in a gas to be treated and separating the adsorbed harmful substance by heating, and the harmful substance separated from the adsorbent layer. A treated gas purification apparatus comprising a catalyst layer for oxidation, wherein the two or more adsorption layers are arranged in series.
隣接する吸着層間の少なくとも１個所に前記被処理ガス
の浄化されたガスを放出する切換手段が設けられたもの
であることを特徴とする被処理ガス浄化装置。2. The switching device according to claim 1, wherein switching means for releasing purified gas of the gas to be treated is provided at least at one position between the adsorbing layers arranged in series and adjacent to each other. Processing gas purification device.
は、該切換手段の切換部を迂回する分岐通路を有するも
のであることを特徴とする被処理ガス浄化装置。3. The apparatus for purifying a gas to be treated according to claim 1 or 2, wherein the switching means has a branch passage bypassing a switching portion of the switching means.
記触媒層は、前記吸着層から分離された有害物質の酸化
を促進する予熱手段によって予熱可能なものであること
を特徴とする被処理ガス浄化装置。4. The object to be treated according to claim 1, wherein the catalyst layer can be preheated by a preheating unit that promotes oxidation of a harmful substance separated from the adsorption layer. Gas purification device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7102588A JPH08294614A (en) | 1995-04-26 | 1995-04-26 | Purification apparatus for gas to be treated |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7102588A JPH08294614A (en) | 1995-04-26 | 1995-04-26 | Purification apparatus for gas to be treated |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08294614A true JPH08294614A (en) | 1996-11-12 |
Family
ID=14331398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7102588A Pending JPH08294614A (en) | 1995-04-26 | 1995-04-26 | Purification apparatus for gas to be treated |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08294614A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742994A (en) * | 2013-11-26 | 2014-04-23 | 南通华新环保设备工程有限公司 | Novel air purifier |
-
1995
- 1995-04-26 JP JP7102588A patent/JPH08294614A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742994A (en) * | 2013-11-26 | 2014-04-23 | 南通华新环保设备工程有限公司 | Novel air purifier |
| CN103742994B (en) * | 2013-11-26 | 2016-05-04 | 南通华新环保设备工程有限公司 | A kind of air purifier |
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