| 摘要 |
PURPOSE:To enable to obtain a relatively large calorific value to a shape while a combustion temperature is being kept comparatively low, by a method wherein a combustion catalyst layer is provided on the surface of a carrier made of porous ceramics and a wall surface of continuous voids, fuel gas and air are made to flow in naturally, and flameless combustion of them is made to perform on the combustion catalyst layer. CONSTITUTION:A large number of continuous voids 4 are existing in gaps among carrier particles 3, 3... of a cylindrical pipe wall 2 made of porous ceramics and catalyst content is carried on the carrier particles 3, 3.... Fuel gas flows in a flow path 1 along the direction of an arrow A and soaks and diffuses further in the direction of an arrow B through a natural inflaw to the voids to be formed among the carrier particles 3, 3.... Air is soaked and diffused in the direction of an arrow C to the voids 4 and an air-fuel gas mixture layer is formed on the surface of a combustion reaction sphere. When ignition is performed within the sphere L1, flameless combustion through the catalyst is performed and exhaust gas is discharged in the direction of an arrow D or through the pipe wall 2. A combustion temperature does not become so high as compared with that obtainable when mixing is made to perform forcibly, life of the catalyst is improved, an area of the reaction sphere per volume of an element is increased and a large calorific value can be obtained. |
