JP2776024B2 - Catalytic combustion device - Google Patents
Catalytic combustion deviceInfo
- Publication number
- JP2776024B2 JP2776024B2 JP30363690A JP30363690A JP2776024B2 JP 2776024 B2 JP2776024 B2 JP 2776024B2 JP 30363690 A JP30363690 A JP 30363690A JP 30363690 A JP30363690 A JP 30363690A JP 2776024 B2 JP2776024 B2 JP 2776024B2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst layer
- catalytic combustion
- combustion device
- fuel
- support frame
- 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 - Fee Related
Links
Landscapes
- Gas Burners (AREA)
- Spray-Type Burners (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は加熱、暖房、乾燥などに用いられる予混合型
の触媒燃焼装置に関する。Description: TECHNICAL FIELD The present invention relates to a premixed catalytic combustion device used for heating, heating, drying, and the like.
従来の技術 灯油のような液体燃料や都市ガスのような気体燃料
を、空気と混合させた後に酸化反応用の触媒に接触さ
せ、触媒層表面で無炎の触媒燃焼を行わせる、いわゆる
予混合型の触媒燃焼装置は、気体燃料用を中心に従来よ
り種々提案され、一部は実用化されている。このような
触媒燃焼装置における触媒層部分の構成は、一般にハニ
カム状基体をガスシール部材を介して支持枠体と接合し
て使用されていた。2. Description of the Related Art So-called premixing, in which a liquid fuel such as kerosene or a gaseous fuel such as city gas is mixed with air and then brought into contact with an oxidation reaction catalyst to perform flameless catalytic combustion on the catalyst layer surface. Conventionally, various types of catalytic combustion devices, mainly for gaseous fuels, have been proposed and some of them have been put to practical use. The structure of the catalyst layer portion in such a catalytic combustion device is generally used by joining a honeycomb-shaped substrate to a support frame via a gas seal member.
発明が解決しようとする課題 このような従来の構成の触媒燃焼装置では、高濃度の
未燃焼混合気をポンプとファンで触媒層に供給し、触媒
燃焼させるため、触媒層とそれを保持する支持枠体との
隙間には充分なガスシール性が要求される。そのため、
単なるガスシール部材ではなく、触媒粉末を分散担持さ
せたガスシール部材を使用していた。Problems to be Solved by the Invention In such a conventional catalytic combustion device, a high-concentration unburned air-fuel mixture is supplied to the catalyst layer by a pump and a fan, and the catalyst is combusted. Sufficient gas sealing properties are required for the gap with the frame. for that reason,
Instead of a simple gas seal member, a gas seal member in which catalyst powder is dispersed and supported is used.
しかし、このような従来のシール方法では充分なガス
シール性を得ることはできても、そのための作業工程が
煩雑となっており、シールに要する費用もかなりかかっ
ていた。However, even with such a conventional sealing method, a sufficient gas sealing property can be obtained, but the working process for that is complicated, and the cost required for the sealing is considerably high.
課題を解決するための手段 このような課題を解決するために本発明は、燃料と空
気の混合室の下流に設けられた多数の連通孔を有する触
媒層と、前記触媒層の上流側表面に対向して配設された
熱線透過体と、前記触媒層の下流側に設けられた排気口
とを備え、前記触媒層の端面に設けた溝と支持枠体に設
けた突起を嵌合することにより前記触媒層を保持するよ
うにしたものである。Means for Solving the Problems To solve such problems, the present invention provides a catalyst layer having a large number of communication holes provided downstream of a fuel and air mixing chamber, and an upstream surface of the catalyst layer. A heat radiation permeable member disposed opposite to the catalyst layer, and an exhaust port provided on the downstream side of the catalyst layer, wherein a groove provided on an end face of the catalyst layer and a projection provided on a support frame are fitted. Thus, the catalyst layer is held.
作用 この構成により、簡単な構成で触媒層とそれを保持す
る支持枠体との間に充分なガスシール性を具備させるこ
とが可能となる。Operation With this configuration, it is possible to provide a sufficient gas sealing property between the catalyst layer and the support frame holding the catalyst layer with a simple configuration.
実施例 以下に本発明の一実施例を添付図面に基づいて説明す
る。第１図に示すように、燃料タンク１は燃料用ポンプ
２を介して混合室４に連結されている。また、送風用の
ファン３も混合室４に連結されている。混合室４の出口
には補助炎口５が設けられており、補助炎口５の近傍に
は点火電極６が配設されている。補助炎口５の上方には
多数の連通孔7aを穿設したシリカ・アルミナ・チタニア
を主成分とするハニカム状セラミックス平板にPt/Pdの
活性成分を担持させた触媒層７が直立して設けられ、触
媒層７の端面には、溝が設けられ支持枠体８と嵌合して
保持されている。触媒層７の前面には上流面（前面）に
対向して熱線透過体９が配置されている。Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the fuel tank 1 is connected to a mixing chamber 4 via a fuel pump 2. Further, a fan 3 for blowing air is also connected to the mixing chamber 4. An auxiliary flame port 5 is provided at the outlet of the mixing chamber 4, and an ignition electrode 6 is provided near the auxiliary flame port 5. Above the auxiliary flame port 5, a catalyst layer 7 in which a Pt / Pd active component is supported is provided upright on a honeycomb-shaped ceramic plate mainly composed of silica, alumina and titania having a large number of communication holes 7a. A groove is provided in the end face of the catalyst layer 7 and is fitted and held by the support frame 8. On the front surface of the catalyst layer 7, a heat ray permeable body 9 is arranged so as to face the upstream surface (front surface).
つぎに、上記のように構成された燃焼装置の動作につ
いて詳述する。燃料用ポンプ２から供給された燃料（灯
油）とファン３から供給された空気は、混合室４内で気
化されると共に充分予混合されて上部の補助炎口５に送
られる。点火時にはまず補助炎口５において点火電極６
によって点火され、ここで火炎燃焼を開始する。高温の
排ガスは上部へ流れ、触媒層７を昇温させる。所定時間
補助炎口５を燃焼させて触媒層７が触媒燃焼をするのに
充分な温度に昇温した時点で、一旦補助炎口５への燃料
供給を停止し、補助炎口５の火炎を消滅させてから再度
燃料の供給を開始する。この時、混合室４を出た予混合
気は上方に流れて直立する触媒層７に至る。この触媒層
７は充分昇温されているから、予混合気は主に上流側
（前面）表面で触媒燃焼を生じつつ、ハニカム状の連通
孔7aを経て下流側（後面）へと流れる。同時に、予混合
気は触媒層７周辺部をも通過しようとする。しかし周辺
部に浸入した予混合気は触媒層７の溝と嵌合するように
設けられた支持枠体の突起11に妨害される。さらに突起
11の周辺部を通過しようとする予混合気は触媒層７の下
流側溝で酸化反応される。Next, the operation of the combustion device configured as described above will be described in detail. The fuel (kerosene) supplied from the fuel pump 2 and the air supplied from the fan 3 are vaporized and sufficiently premixed in the mixing chamber 4 and sent to the upper auxiliary flame port 5. At the time of ignition, first the ignition electrode 6
And start flame combustion here. The high-temperature exhaust gas flows to the upper part and raises the temperature of the catalyst layer 7. When the auxiliary flame port 5 is burned for a predetermined time and the temperature of the catalyst layer 7 rises to a temperature sufficient for catalytic combustion, the supply of fuel to the auxiliary flame port 5 is temporarily stopped, and the flame of the auxiliary flame port 5 is discharged. After the disappearance, supply of fuel is started again. At this time, the premixed gas flowing out of the mixing chamber 4 flows upward and reaches the catalyst layer 7 which stands upright. Since the temperature of the catalyst layer 7 is sufficiently raised, the premixed gas flows to the downstream side (rear side) through the honeycomb-shaped communication hole 7a while causing catalytic combustion mainly on the upstream side (front side) surface. At the same time, the premixed gas tends to pass also around the catalyst layer 7. However, the premixed gas that has entered the peripheral portion is obstructed by the projections 11 of the support frame provided to fit into the grooves of the catalyst layer 7. Further protrusion
The premixed gas that is going to pass through the periphery of 11 is oxidized in the downstream groove of the catalyst layer 7.
触媒燃焼により触媒層７の上流側表面で生じた反応熱
は、熱線透過体９を一部は透過し、また一部は熱線透過
体９を加熱し、加熱された熱線透過体９からは二次放射
としてそれぞれ前面に熱線が放散され、加熱や暖房等に
供せられる。The reaction heat generated on the upstream surface of the catalyst layer 7 by the catalytic combustion partially passes through the heat ray permeable body 9 and partially heats the heat ray permeable body 9, and the heat ray permeable body 9 is heated by the heat ray permeable body 9. Heat rays are radiated to the front as the next radiation, respectively, and used for heating, heating, and the like.
（実施例） シリカ・アルミナ・チタニアを主成分とするハニカム
状セラミックス（150□×10mm、30セル/inch2、リブ厚
0.25mm）にBaO・Al2O3・CeO2粉末（比表面積120m2/g）1
000g、アルミナ含有率10wt％のウォッシュコートバイン
ダー200g、硝酸アルミニウム９水塩85g、水1300gおよび
ジニトロジアンミン白金水溶液とジニトロジアンミンパ
ラジウム水溶液をそれぞれPt、Pd換算で5g、2.5g加えて
なるウォッシュコートスラリーで40g被覆し、触媒燃焼
用触媒を得た。(Example) Honeycomb-shaped ceramics mainly composed of silica, alumina, and titania (150 □ × 10 mm, 30 cells / inch 2 , rib thickness)
0.25mm) BaO ・ Al 2 O 3・ CeO 2 powder (specific surface area 120m 2 / g) 1
000 g, 200 g of a wash coat binder having an alumina content of 10 wt%, 85 g of aluminum nitrate decahydrate, 1300 g of water, and a wash coat slurry obtained by adding 5 g and 2.5 g of an aqueous solution of dinitrodiammine platinum and an aqueous solution of dinitrodiammine palladium in terms of Pt and Pd, respectively. 40 g was coated to obtain a catalyst for catalytic combustion.
この触媒層７の端面中央部に幅3mm、深さ5mmの溝を設
け、支持枠体の突起11と嵌合させるようにした。A groove having a width of 3 mm and a depth of 5 mm was provided at the center of the end face of the catalyst layer 7 so as to fit with the projection 11 of the support frame.
その後、第１図のような燃焼装置を構成し、2200kcal
/h、空燃比（空気／灯油）1.7の状態で燃焼させなが
ら、触媒層周辺部の炭化水素の漏れを触媒層から下流へ
1cm離れたところに2mmφのノズルを設け、燃焼ガスを採
取してその組成を分析した。After that, a combustion device as shown in Fig. 1 was constructed, and 2200 kcal
/ h, while burning at an air-fuel ratio (air / kerosene) of 1.7, leaks hydrocarbons around the catalyst layer downstream from the catalyst layer
A nozzle having a diameter of 2 mm was provided at a distance of 1 cm, the combustion gas was sampled, and the composition was analyzed.
（比較例） 端面に溝のない触媒層７を、実施例１と同じ触媒を使
用してPtを0.2wt％担持された厚み4mmのガスシール部材
（アルミナシリカ繊維95wt％、活性アルミナ4wt％、バ
インダー1wt％）により支持枠体と接合し、実施例と同
様な燃焼装置を構成し、2200kcal/h、空燃比1.7の状態
で燃焼させながら、触媒層周辺部の炭化水素の漏れを触
媒層から下流に1cm離れたところに2mmφのノズルを設
け、燃焼ガスを採取して、その組成を分析した。(Comparative Example) A 4 mm-thick gas seal member (95% by weight of alumina silica fiber, 4% by weight of activated alumina, and 0.2% by weight of Pt supported on the catalyst layer 7 having no groove on the end surface using the same catalyst as in Example 1) Combined with the support frame with a binder 1 wt%), the same combustion device as in the example was constructed, and while burning at 2200 kcal / h and an air-fuel ratio of 1.7, the leakage of hydrocarbons around the catalyst layer was removed from the catalyst layer. A nozzle having a diameter of 2 mm was provided at a position 1 cm downstream of the nozzle, the combustion gas was sampled, and the composition was analyzed.
その結果、本発明による触媒燃焼装置は従来までのガ
スシール部材を使用していた装置と比較してほとんど同
等の性能を示した。 As a result, the catalytic combustion device according to the present invention exhibited almost the same performance as that of a device using a conventional gas seal member.
したがって、本発明の構成により、簡単かつ低コスト
な方法で充分なガスシールを達成することができた。Therefore, according to the configuration of the present invention, a sufficient gas seal can be achieved by a simple and low-cost method.
また、従来までのガスシール部材を使用する構成では
ガスシール部材の寿命（長期間にわたるクッション性の
維持と触媒性能の維持）を考慮しなければならなかった
が、本発明ではハニカム触媒を支持枠体と嵌合させるこ
とによりガスシールを行っているので、そのような心配
も不要となる。Further, in the conventional configuration using the gas seal member, the life of the gas seal member (maintaining the cushioning property and maintaining the catalytic performance over a long period of time) has to be taken into consideration. Since the gas seal is performed by fitting with the body, such a concern is not required.
なお、本実施例ではハニカム状基体を用いて触媒体を
構成したが、本発明はこれに限定されるものではなく、
多数の連通孔を有する基体であればどのような形状でも
構わない。In this example, the catalyst body was formed using the honeycomb-shaped substrate, but the present invention is not limited to this.
Any shape may be used as long as the substrate has a large number of communication holes.
発明の効果 以上の実施例の説明からも明らかなように本発明によ
れば、簡単かつ低コストな構成で触媒層とそれを保持す
る支持枠体との間に充分なガスシール性を具備した触媒
燃焼装置を提供することができた。Advantageous Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, the catalyst layer has a sufficient gas sealing property between the catalyst layer and the support frame holding the catalyst layer with a simple and low-cost configuration. A catalytic combustion device could be provided.
第１図は本発明の一実施例の触媒燃焼装置の全体構成を
示す縦断面図である。 ２……燃料用ポンプ、３……送風用ファン、４……混合
室、５……補助炎口、７……触媒層、7a……連通孔、８
……支持枠体、９……熱線透過体、10……排気口、11…
…突起。FIG. 1 is a longitudinal sectional view showing the overall configuration of a catalytic combustion device according to one embodiment of the present invention. 2 ... Fuel pump, 3 ... Blower fan, 4 ... Mixing chamber, 5 ... Auxiliary flame port, 7 ... Catalyst layer, 7a ... Communication hole, 8
...... Support frame, 9 ... Heat-transmissive body, 10 ... Exhaust port, 11
... projections.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加藤 博久 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平１−306712（ＪＰ，Ａ) 実開 昭63−30722（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) F23D 11/40 F23D 14/18────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirohisa Kato 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-1-306712 (JP, A) 30722 (JP, U) (58) Field surveyed (Int. Cl. 6 , DB name) F23D 11/40 F23D 14/18
Claims (1)
られた多数の連通孔を有する触媒層と、前記触媒層の上
流側表面に対向して配設された熱線透過体と、前記触媒
層の下流側に設けられた排気口とを備え、前記触媒層の
端面に設けた溝と、支持枠体に設けた突起を嵌合するこ
とにより前記触媒層を保持する触媒燃焼装置。A catalyst layer having a plurality of communication holes provided downstream of a mixing chamber for mixing fuel and air; a heat ray permeable body disposed opposite an upstream surface of the catalyst layer; A catalytic combustion device comprising: an exhaust port provided on a downstream side of a catalyst layer; and holding the catalyst layer by fitting a groove provided on an end surface of the catalyst layer with a projection provided on a support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30363690A JP2776024B2 (en) | 1990-11-07 | 1990-11-07 | Catalytic combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30363690A JP2776024B2 (en) | 1990-11-07 | 1990-11-07 | Catalytic combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04177009A JPH04177009A (en) | 1992-06-24 |
| JP2776024B2 true JP2776024B2 (en) | 1998-07-16 |
Family
ID=17923377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30363690A Expired - Fee Related JP2776024B2 (en) | 1990-11-07 | 1990-11-07 | Catalytic combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2776024B2 (en) |
-
1990
- 1990-11-07 JP JP30363690A patent/JP2776024B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04177009A (en) | 1992-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |