JPH0634814Y2 - Exhaust gas treatment device - Google Patents
Exhaust gas treatment deviceInfo
- Publication number
- JPH0634814Y2 JPH0634814Y2 JP11120889U JP11120889U JPH0634814Y2 JP H0634814 Y2 JPH0634814 Y2 JP H0634814Y2 JP 11120889 U JP11120889 U JP 11120889U JP 11120889 U JP11120889 U JP 11120889U JP H0634814 Y2 JPH0634814 Y2 JP H0634814Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- catalyst
- attached
- gas treatment
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 (産業上の利用分野) 本考案は排ガス処理装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an exhaust gas treatment device.
(従来の技術) 従来、一般に、排ガス処理装置は、筒体内部にハニカム
状の酸化あるいは還元触媒を配設し、この触媒と排ガス
とを接触させることにより、排ガス中に含まれる有害物
質(一酸化炭素,炭化水素等)を無害物質に変えるもの
である。そして、この種の排ガス処理装置では、前記触
媒にダスト等が付着して被毒すると、水洗により触媒性
能を回復させるようにしていた(例えば、特開昭60−11
4329号公報、特開昭63−13735号公報参照)。(Prior Art) Conventionally, an exhaust gas treating apparatus is generally provided with a honeycomb-shaped oxidation or reduction catalyst inside a tubular body, and the catalyst and the exhaust gas are brought into contact with each other to remove harmful substances ( It converts carbon dioxide, hydrocarbons, etc.) into harmless substances. In this type of exhaust gas treating apparatus, when dust or the like adheres to the catalyst and poisons it, the catalyst performance is restored by washing with water (for example, JP-A-60-11).
4329, JP-A-63-13735).
(考案が解決しようとする課題) ところが、排ガスが、例えば、アスファルト再生炉から
発生する排ガスであると、この排ガスには、悪臭物質以
外にカーボン,ピッチ等の成分が含まれており、これら
は触媒に強固に付着するため、前述のような水洗だけで
除去しきれず、その結果、触媒の性能が低下し、触媒の
寿命が短くなるという問題点があった。(Problems to be solved by the invention) However, if the exhaust gas is, for example, an exhaust gas generated from an asphalt regenerating furnace, the exhaust gas contains components such as carbon and pitch in addition to the malodorous substances. Since it adheres strongly to the catalyst, it cannot be completely removed by washing with water as described above, and as a result, the performance of the catalyst deteriorates and the life of the catalyst becomes short.
そこで、本考案は、触媒に付着したカーボン,ピッチ等
を完全に除去することにより、触媒の長寿命化を図るこ
とができる排ガス処理装置を提供することを目的とす
る。Therefore, an object of the present invention is to provide an exhaust gas treatment device capable of extending the life of the catalyst by completely removing carbon, pitch, etc. attached to the catalyst.
(課題を解決するための手段) 本考案は前記目的を達成するために、排ガス処理装置
を、堅形筒体内に含浸型セラミックス製ハニカム体から
なる酸化触媒層を設け、この触媒層の上方に散水ノズ
ル、下方に熱風供給ノズルを配設するとともに、前記筒
体の上部に排気管、下部に排ガス供給管、底部に排水管
をそれぞれ取り付けたものである。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides an exhaust gas treatment device, in which an oxidation catalyst layer made of an impregnated ceramic honeycomb body is provided in a rigid cylinder, and above this catalyst layer. A water spray nozzle and a hot air supply nozzle are provided below, and an exhaust pipe is attached to the upper part of the cylinder, an exhaust gas supply pipe is attached to the lower part, and a drain pipe is attached to the bottom part.
(実施例) 次に、本考案に係る排ガス処理装置を添付図面を参照し
て説明する。(Example) Next, an exhaust gas treatment apparatus according to the present invention will be described with reference to the accompanying drawings.
図において、筒体1内の上方部および下方部には酸化触
媒層2,3が設けられている。この触媒層2,3にはポーラス
なセラミックス製ハニカム体に触媒金属を含浸させた含
浸型ともいわれるものを使用している。In the figure, oxidation catalyst layers 2 and 3 are provided in an upper portion and a lower portion inside a cylindrical body 1. For the catalyst layers 2 and 3, what is called an impregnation type in which a porous ceramic honeycomb body is impregnated with a catalytic metal is used.
そして、前記各触媒層2,3の上方には散水ノズル9a,9b、
下方には熱風供給ノズル10a,10bが配設されており、散
水ノズル9aと9b、熱風供給ノズル10aと10bはそれぞれ連
通して、前者には洗浄水が、後者には熱風が供給される
ようになっている。Then, above the catalyst layers 2 and 3, water spray nozzles 9a and 9b,
Hot air supply nozzles 10a and 10b are disposed below, and the sprinkling nozzles 9a and 9b and the hot air supply nozzles 10a and 10b are in communication with each other so that cleaning water is supplied to the former and hot air is supplied to the latter. It has become.
また、前記筒体1の下部には排ガス供給管1a、上部には
排気管1b、底部には排水管1cがそれぞれ取り付けられて
いる。An exhaust gas supply pipe 1a is attached to the lower portion of the cylindrical body 1, an exhaust pipe 1b is attached to the upper portion, and a drain pipe 1c is attached to the bottom portion.
前記排ガス供給管1aには、図示しないアスファルト再生
炉の排気管が予熱室8を介して連通されている。一方、
前記筒体1の内部には温度センサ4が、前記排気管1bに
は臭気センサ6がそれぞれ設けられている。前記温度セ
ンサ4は筒体1内の雰囲気温度を、前記臭気センサ6は
排気管1bを通過する排ガス中に含まれる臭気物質を検出
するものである。An exhaust pipe of an asphalt regenerating furnace (not shown) is connected to the exhaust gas supply pipe 1a via a preheating chamber 8. on the other hand,
A temperature sensor 4 is provided inside the cylindrical body 1, and an odor sensor 6 is provided at the exhaust pipe 1b. The temperature sensor 4 detects the ambient temperature inside the cylinder 1, and the odor sensor 6 detects odorous substances contained in the exhaust gas passing through the exhaust pipe 1b.
なお、予熱室8に設けたバーナへの燃料および空気の供
給量は、前記温度センサ4から送られる検出信号と、前
記臭気センサ6から温度設定器7を介して送られる検出
信号に基づき温度コントローラ5で所定量に調節され、
筒体1内に供給される排ガス温度を酸化触媒の最適反応
温度(300〜400℃)に調節するようになっている。The amount of fuel and air supplied to the burner provided in the preheating chamber 8 is controlled by the temperature controller based on the detection signal sent from the temperature sensor 4 and the detection signal sent from the odor sensor 6 via the temperature setter 7. Adjusted to a predetermined amount with 5,
The temperature of the exhaust gas supplied into the cylinder 1 is adjusted to the optimum reaction temperature (300 to 400 ° C.) of the oxidation catalyst.
前記構成からなる排ガス処理装置では、図示しないアス
ファルト再生炉等から排出された排ガス(温度200〜250
℃)は、予熱室8で300〜400℃に昇温された後、排ガス
供給管1aから筒体1内に供給される。そして、この排ガ
スは、前記筒体1内を上昇し、酸化触媒層2,3を順次通
過して排ガス中の悪臭物質等が無害物質(二酸化炭素,
水素等)に変換され、筒体1の上部に設けた排気管1b,
排気ファン11を介して外部に排気される。In the exhaust gas treating apparatus having the above structure, the exhaust gas (temperature of 200 to 250
(° C) is heated to 300 to 400 ° C in the preheating chamber 8 and then supplied into the cylindrical body 1 from the exhaust gas supply pipe 1a. Then, the exhaust gas rises in the cylindrical body 1 and sequentially passes through the oxidation catalyst layers 2 and 3 so that the malodorous substances and the like in the exhaust gas are harmless substances (carbon dioxide,
The exhaust pipe 1b provided on the upper part of the cylinder 1,
It is exhausted to the outside through the exhaust fan 11.
そして、排ガス処理により前記触媒層2,3が被毒されて
触媒性能が低下すると、排ガスの供給を停止し、まず、
触媒層2,3の上方に設けた散水ノズル9a,9bから洗浄水を
所定時間散布して、触媒層2,3に付着しているダスト等
を水洗する。水洗し終わった洗浄水は筒体1底部の排水
管1cから外部に排出される。Then, when the catalyst performance is deteriorated by poisoning the catalyst layers 2 and 3 by the exhaust gas treatment, the supply of the exhaust gas is stopped, and first,
Cleaning water is sprayed from the water spray nozzles 9a and 9b provided above the catalyst layers 2 and 3 for a predetermined time to wash dust and the like adhering to the catalyst layers 2 and 3 with water. The wash water that has been washed with water is discharged to the outside from the drain pipe 1c at the bottom of the cylinder 1.
次に、触媒層2,3の下方に設けた熱風供給ノズル10a,10b
より500〜700℃の熱風を所定時間供給して、触媒層2,3
に付着している残留可燃物(カーボン,ピッチ等)をバ
ーンアウト(燃焼除去)する。前記触媒層2,3は含浸型
を使用しているため、担体(セラミックス)の表面に触
媒金属を付着した、いわゆる塗布型のように、前記水洗
あるいはバーンアウトによる触媒金属の剥離の問題がな
く、触媒機能が低下しない。Next, hot air supply nozzles 10a, 10b provided below the catalyst layers 2, 3
The hot air of 500-700 ℃ is supplied for a predetermined time, and the catalyst layers 2, 3
Burn out (burn off) residual combustibles (carbon, pitch, etc.) adhering to the. Since the catalyst layers 2 and 3 are of impregnated type, there is no problem of peeling of the catalytic metal due to the above washing or burnout unlike the so-called coating type in which the catalytic metal is adhered to the surface of the carrier (ceramics). , The catalytic function does not deteriorate.
なお、本実施例では、排ガスの流通路に2つの触媒層を
直列に設けたが、一層でもよく、この排ガス処理装置を
並設し、一方で排ガス処理、他方で触媒の再生を行うよ
うにしてもよい。In this embodiment, two catalyst layers were provided in series in the exhaust gas flow passage, but a single layer may be provided, and the exhaust gas treatment devices may be arranged in parallel to perform exhaust gas treatment on the one hand and catalyst regeneration on the other hand. May be.
(考案の効果) 以上の説明から明らかなように、本考案に係る排ガス処
理装置では、まず、被毒した触媒を水洗により除去し、
その後、水洗により除去しきれない可燃物質(カーボ
ン,ピッチ等)を熱風によりバーンアウト(燃焼除去)
できるので、従来に比べて触媒の賦活が十分にでき、触
媒層2,3の寿命は従来水洗のみで行っていた場合、1年
未満であったものを3年以上に延ばすことができ、触媒
の長寿命化が図れることになる。(Effect of the Invention) As is clear from the above description, in the exhaust gas treating apparatus of the present invention, first, the poisoned catalyst is removed by washing with water,
After that, burn out (burn off) combustible substances (carbon, pitch, etc.) that cannot be removed by washing with hot air.
As a result, the catalyst can be sufficiently activated as compared with the conventional case, and the life of the catalyst layers 2 and 3 can be extended from 3 years or more to less than 1 year if the conventional cleaning was performed only with water. It is possible to extend the life of the.
また、触媒層に含浸型のものを使用したので、触媒金属
を担体(セラミックス)の表面に塗布したものに比べて
水洗あるいはバーンアウトによる賦活時の触媒機能の低
下がない。Further, since the impregnated type is used for the catalyst layer, the catalytic function is not deteriorated at the time of activation by washing with water or burnout as compared with the case where the catalyst metal is coated on the surface of the carrier (ceramics).
第1図は本考案に係る排ガス処理装置の構成図である。 1…筒体、1a…排ガス供給管、1b…排気管、1c…排水
管、2,3…第1,第2酸化触媒層、8…予熱室、9a,9b散水
ノズル、10a,10b…熱風供給ノズル。FIG. 1 is a block diagram of an exhaust gas treating apparatus according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Cylindrical body, 1a ... Exhaust gas supply pipe, 1b ... Exhaust pipe, 1c ... Drain pipe, 2,3 ... First and second oxidation catalyst layers, 8 ... Preheating chamber, 9a, 9b water spray nozzle, 10a, 10b ... Hot air Supply nozzle.
Claims (1)
ム体からなる酸化触媒層を設け、この触媒層の上方に散
水ノズル、下方に熱風供給ノズルを配設するとともに、
前記筒体の上部に排気管、下部に排ガス供給管、底部に
排水管をそれぞれ取り付けたことを特徴とする排ガス処
理装置。1. An oxidation catalyst layer made of an impregnated ceramic honeycomb body is provided in a rigid cylinder, a water spray nozzle is provided above the catalyst layer, and a hot air supply nozzle is provided below the catalyst layer.
An exhaust gas treatment device, wherein an exhaust pipe is attached to an upper portion of the cylindrical body, an exhaust gas supply pipe is attached to a lower portion thereof, and a drain pipe is attached to a bottom portion thereof.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11120889U JPH0634814Y2 (en) | 1989-09-22 | 1989-09-22 | Exhaust gas treatment device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11120889U JPH0634814Y2 (en) | 1989-09-22 | 1989-09-22 | Exhaust gas treatment device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0354731U JPH0354731U (en) | 1991-05-27 |
JPH0634814Y2 true JPH0634814Y2 (en) | 1994-09-14 |
Family
ID=31659699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11120889U Expired - Lifetime JPH0634814Y2 (en) | 1989-09-22 | 1989-09-22 | Exhaust gas treatment device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0634814Y2 (en) |
-
1989
- 1989-09-22 JP JP11120889U patent/JPH0634814Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0354731U (en) | 1991-05-27 |
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