JP2000055312A5 - - Google Patents

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JP2000055312A5
JP2000055312A5 JP1999156486A JP15648699A JP2000055312A5 JP 2000055312 A5 JP2000055312 A5 JP 2000055312A5 JP 1999156486 A JP1999156486 A JP 1999156486A JP 15648699 A JP15648699 A JP 15648699A JP 2000055312 A5 JP2000055312 A5 JP 2000055312A5
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combustion
catalyst
combustion chamber
air
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JP2000055312A (en
JP4226143B2 (en
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【特許請求の範囲】
【請求項1】 上流側に設けられた、燃料と空気の混合気入口と、下流側に設けられた排ガス出口と、多数の連通孔を有する基材に酸化触媒を担持させた第一の触媒体が配置された一次燃焼室と、前記一次燃焼室の下流側に設けられた、混合気または空気の二次供給口と、その二次供給口の下流に設けられた二次燃焼室とを備え、
燃焼する際、所定の条件を満足する場合は、前記一次燃焼室の空気過剰率は、1未満として燃焼し、
前記酸化触媒は、PtもしくはRh、またはPtもしくはRhを主体とする材料で構成され、
前記触媒体は、CeO 2 またはZrO 2 の一方あるいは両者を主成分として含む触媒燃焼装置。
【請求項】 前記所定の条件を満足するとは、前記2次燃焼室における燃焼率が、あるいは排ガス中における可燃成分濃度が、所定のレベルとなることであることを特徴とする請求項記載の触媒燃焼装置。
【請求項】 前記二次燃焼室は、多数の連通孔を有する基材に酸化触媒を担持させた第二の触媒体を備えたことを特徴とする請求項1または2に記載の触媒燃焼装置。
【請求項】前記二次燃焼室に供給する空気は、前記二次燃焼室の排気ガスにより加熱されることにより予熱されることを特徴とする請求項1〜のいずれかに記載の触媒燃焼装置。
【請求項】前記混合気入口から供給される混合気の空気過剰率は、前記混合気中の燃料成分量の減少とともに減少させることを特徴とする請求項1〜のいずれかに記載の触媒燃焼装置。
【請求項】前記混合気入口から供給される混合気の燃料成分量は実質上一定として空気量のみ増減させるとともに、少なくともその増減量相当分の空気を前記二次供給口から供給することを特徴とする請求項1〜のいずれかに記載の触媒燃焼装置。
【請求項】前記混合気入口から供給される混合気の空気過剰率は、前記第二の触媒体が所定温度まで上昇する時点まで、1以上としたことを特徴とする請求項1〜のいずれかに記載の触媒燃焼装置。
【請求項】前記混合気入口から供給される混合気の空気過剰率は、前記一次燃焼室における燃焼量が所定の燃焼量以上では1未満であり、その所定の燃焼量未満では1以上であることを特徴とする請求項1〜のいずれかに記載の触媒燃焼装置。
【請求項】前記第一の触媒体の基材の熱伝導率が10W/m・℃以上であることを特徴とする請求項1〜のいずれかに記載の触媒燃焼装置。
【請求項10】前記PtまたはPtを主体とする酸化触媒を担持させた触媒体は、PtまたはPtを主体とする酸化触媒層と、RhまたはPdを主体とする酸化触媒層とが積層して設けられていることを特徴とする請求項記載の触媒燃焼装置。
【請求項11】前記PtまたはPtを主体とする酸化触媒層に対して積層される前記RhまたはPdを主体とする酸化触媒層は、下流側に部分的に設けられていることを特徴とする請求項10記載の媒燃焼装置。
【請求項12】前記燃焼する際、前記一次燃焼室の空気過剰率を1未満として燃焼する方法として、
前記一次燃焼室の空気過剰率を変動させて、前記触媒体の近傍に設けられた温度検知部により前記触媒体の温度が最高となる空気過剰率を判定しておき、前記空気過剰率より低い空気過剰率領域で前記一次燃焼室の燃焼を行うことを特徴とする請求項1記載の触媒燃焼装置。
【請求項13】上流側に設けられた、燃料と空気の混合気入口と、下流側に設けられた排ガス出口と、多数の連通孔を有する基材に酸化触媒を担持させた触媒体が配置された一次燃焼室と、前記一次燃焼室の下流側に設けられた、混合気または空気の二次供給口と、その二次供給口の下流に設けられた二次燃焼室とを備えた触媒燃焼装置の燃焼制御方法であって、
初期は前記一次燃焼室の空気過剰率は1以上とし、前記二次燃焼室の燃焼率が所定レベルを越えた後は、前記前記一次燃焼室の空気過剰率を1未満として燃焼し、
前記酸化触媒は、PtもしくはRh、またはPtもしくはRhを主体とする材料で構成され、
前記触媒体は、CeO 2 またはZrO 2 の一方あるいは両者を主成分として含む触媒燃焼装置の燃焼制御方法。
[Claims]
1. A first touch in which an oxidation catalyst is supported on a base material having a mixture inlet of fuel and air provided on the upstream side, an exhaust gas outlet provided on the downstream side, and a large number of communication holes. The primary combustion chamber in which the medium is arranged, the secondary supply port for the air-fuel mixture or air provided on the downstream side of the primary combustion chamber, and the secondary combustion chamber provided on the downstream side of the secondary supply port are provided. Prepare,
When burning, if the predetermined conditions are satisfied, the excess air ratio of the primary combustion chamber is set to less than 1, and the combustion is performed .
The oxidation catalyst is composed of Pt or Rh, or a material mainly composed of Pt or Rh.
The catalyst body is a catalyst combustion device containing one or both of CeO 2 and ZrO 2 as a main component.
And wherein satisfying the predetermined condition, the combustion rate in the secondary combustion chamber, or combustible component concentration in the exhaust gas, according to claim 1, wherein a is to a predetermined level Catalytic combustion equipment.
3. The catalyst combustion according to claim 1 or 2 , wherein the secondary combustion chamber is provided with a second catalyst body in which an oxidation catalyst is supported on a base material having a large number of communication holes. apparatus.
Wherein air supplied to the secondary combustion chamber, the catalyst according to any one of claims 1 to 3, characterized in that it is preheated by being heated by the exhaust gas in the secondary combustion chamber Combustion device.
5. The excess air ratio of the mixture supplied from the mixture inlet, according to any one of claims 1 to 3, wherein the reducing with decreasing fuel component amount in the mixture Catalytic combustion device.
6. The fuel component of the mixture supplied from the mixture inlet with increasing or decreasing only the air amount as substantially constant, to supply at least the decrease amount equivalent of air from said secondary supply port The catalytic combustion apparatus according to any one of claims 1 to 3.
7. Claims 1 to 3 are characterized in that the excess air ratio of the air-fuel mixture supplied from the air-fuel mixture inlet is 1 or more until the time when the second catalyst rises to a predetermined temperature. The catalyst combustion apparatus according to any one of.
8. The air excess ratio of the mixture supplied from the mixture inlet, the is less than one in the combustion amount in the primary combustion chamber a predetermined combustion amount or more, is less than the predetermined combustion amount in one or more The catalyst combustion apparatus according to any one of claims 1 to 3, wherein the catalyst combustion apparatus is provided.
9. The catalytic combustion apparatus according to any one of claims 1 to 3, wherein the thermal conductivity of the base material of the first catalyst body is 10 W / m · ° C. or higher.
10. A catalyst obtained by supporting an oxidation catalyst composed mainly of the Pt or Pt is an oxidation catalyst layer mainly composed of Pt or Pt, are stacked and the oxidation catalyst layer mainly composed of Rh, or Pd The catalyst combustion apparatus according to claim 1 , wherein the catalyst combustion apparatus is provided.
11. The oxidation catalyst layer mainly the Rh or Pd are stacked against oxidation catalyst layer mainly comprising the Pt or Pt is characterized in that partially disposed downstream The medium combustion apparatus according to claim 10.
12. When the combustion, as a method for the combustion air excess ratio of the primary combustion chamber as less than 1,
The excess air rate of the primary combustion chamber is fluctuated, and the excess air rate at which the temperature of the catalyst body becomes the highest is determined by a temperature detection unit provided in the vicinity of the catalyst body, which is lower than the excess air rate. The catalyst combustion apparatus according to claim 1, wherein the primary combustion chamber is burned in an excess air ratio region.
13. disposed upstream, and mixture inlet of the fuel and air, and an exhaust gas outlet provided downstream, catalytic bodies disposed obtained by supporting an oxidation catalyst on the substrate having a plurality of communication holes A catalyst provided with a primary combustion chamber, a secondary supply port for air-fuel mixture or air provided on the downstream side of the primary combustion chamber, and a secondary combustion chamber provided downstream of the secondary supply port. It is a combustion control method for combustion equipment.
Initially, the excess air ratio of the primary combustion chamber is set to 1 or more, and after the combustion rate of the secondary combustion chamber exceeds a predetermined level, the excess air ratio of the primary combustion chamber is set to less than 1, and combustion is performed.
The oxidation catalyst is composed of Pt or Rh, or a material mainly composed of Pt or Rh.
The method for controlling combustion of a catalyst combustion apparatus, wherein the catalyst body contains one or both of CeO 2 and ZrO 2 as a main component.

【0006】
【課題を解決するための手段】
本発明は、上流側に設けられた、燃料と空気の混合気入口と、下流側に設けられた排ガス出口と、多数の連通孔を有する基材に酸化触媒を担持させた第一の触媒体が配置された一次燃焼室と、前記一次燃焼室の下流側に設けられた、混合気または空気の二次供給口と、その二次供給口の下流に設けられた二次燃焼室とを備え、
燃焼する際、所定の条件を満足する場合は、前記一次燃焼室の空気過剰率は、1未満として燃焼し、
前記酸化触媒は、PtもしくはRh、またはPtもしくはRhを主体とする材料で構成され、
前記触媒体は、CeO 2 またはZrO 2 の一方あるいは両者を主成分として含む触媒燃焼装置である。
0006
[Means for solving problems]
The present invention is a first catalyst body in which an oxidation catalyst is supported on a base material having a mixture inlet of fuel and air provided on the upstream side, an exhaust gas outlet provided on the downstream side, and a large number of communication holes. A primary combustion chamber in which is arranged, a secondary supply port for air-fuel mixture or air provided on the downstream side of the primary combustion chamber, and a secondary combustion chamber provided on the downstream side of the secondary supply port. ,
When burning, if the predetermined conditions are satisfied, the excess air ratio of the primary combustion chamber is set to less than 1, and the combustion is performed .
The oxidation catalyst is composed of Pt or Rh, or a material mainly composed of Pt or Rh.
The catalyst body is a catalyst combustion device containing one or both of CeO 2 and ZrO 2 as a main component.

また、本発明は、上流側に設けられた、燃料と空気の混合気入口と、下流側に設けられた排ガス出口と、多数の連通孔を有する基材に酸化触媒を担持させた触媒体が配置された一次燃焼室と、前記一次燃焼室の下流側に設けられた、混合気または空気の二次供給口と、その二次供給口の下流に設けられた二次燃焼室とを備えた触媒燃焼装置の燃焼制御方法であって、
初期は前記一次燃焼室の空気過剰率は1以上とし、前記二次燃焼室の燃焼率が所定レベルを越えた後は、前記前記一次燃焼室の空気過剰率を1未満として燃焼し、
前記酸化触媒は、PtもしくはRh、またはPtもしくはRhを主体とする材料で構成され、
前記触媒体は、CeO 2 またはZrO 2 の一方あるいは両者を主成分として含む触媒燃焼装置の燃焼制御方法である。
Further, in the present invention, a catalyst body in which an oxidation catalyst is supported on a base material having a mixture inlet of fuel and air provided on the upstream side, an exhaust gas outlet provided on the downstream side, and a large number of communication holes is provided. It is provided with an arranged primary combustion chamber, a secondary supply port for air-fuel mixture or air provided on the downstream side of the primary combustion chamber, and a secondary combustion chamber provided downstream of the secondary supply port. It is a combustion control method for the catalyst combustion chamber.
Initially, the excess air ratio of the primary combustion chamber is set to 1 or more, and after the combustion rate of the secondary combustion chamber exceeds a predetermined level, the excess air ratio of the primary combustion chamber is set to less than 1, and combustion is performed.
The oxidation catalyst is composed of Pt or Rh, or a material mainly composed of Pt or Rh.
The catalyst body is a combustion control method for a catalyst combustion apparatus containing one or both of CeO 2 and ZrO 2 as a main component.

JP15648699A 1998-06-05 1999-06-03 Catalytic combustion apparatus and combustion control method thereof Expired - Fee Related JP4226143B2 (en)

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JP15755598 1998-06-05
JP10-157555 1998-06-05
JP15648699A JP4226143B2 (en) 1998-06-05 1999-06-03 Catalytic combustion apparatus and combustion control method thereof

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JP2000055312A5 true JP2000055312A5 (en) 2006-04-20
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FR2791419B1 (en) * 1999-03-25 2001-05-04 Sunkiss Aeronautique SURFACE EMISSION EQUIPMENT OF INFRARED RADIATION, OF THE TUNNEL TYPE, COMPRISING CATALYTIC COMBUSTION DEVICES
JP5588935B2 (en) * 2011-07-19 2014-09-10 日立Geニュークリア・エナジー株式会社 Exhaust gas recombiner and gas waste treatment system of boiling water nuclear power plant equipped with the same
CN107300169B (en) * 2016-04-14 2019-12-27 中国科学院大连化学物理研究所 Catalytic flameless combustion device and combustion method with extremely low pollutant emission

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JPH0739843B2 (en) * 1985-05-25 1995-05-01 バブコツク日立株式会社 Catalytic combustion device
JP2788293B2 (en) * 1989-07-21 1998-08-20 東京濾器株式会社 Exhaust gas purification catalyst
JPH0367906A (en) * 1989-08-03 1991-03-22 Matsushita Electric Ind Co Ltd Catalytic combustion apparatus
JPH04174201A (en) * 1990-11-07 1992-06-22 Matsushita Electric Ind Co Ltd Catalytic burner
EP0559844B1 (en) * 1990-11-26 1999-02-10 Catalytica, Inc. Palladium partial combustion catalysts and a process for using them
JPH05157211A (en) * 1991-12-06 1993-06-22 Matsushita Electric Ind Co Ltd Catalyst combustion device
JPH05269381A (en) * 1992-03-25 1993-10-19 Mitsubishi Heavy Ind Ltd Oxidation catalyst
JPH0842814A (en) * 1994-07-29 1996-02-16 Miura Kenkyusho:Kk Catalytic burning method
JPH1026315A (en) * 1996-07-08 1998-01-27 Aisin Seiki Co Ltd Catalytic combustor and method for catalytic combustion

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