| 摘要 |
PURPOSE:To enable cleaning of exhaust gas through stable and efficient flameless combustion of fuel on a catalyst body in a ratio of the air to the fuel which covers a wide range, by a method wherein bored holes in an injection plate are ununiformly disposed. CONSTITUTION:An injection plate 10, having a number of bored holes 9 which are divided into 6 blocks for arrangement, is disposed ahead of evaporation premixing cylinder 5 so that it is formed integrally with the evaporation premixing cylinder 5. A cylindrical combustion cylinder 11 of a heat resisting metal is further joined thereto. A back fire preventing plate 12, a catalyst body 13, and a honeycomb shut-off plate 14 for preventing the cooling action of the open air on the catalyst body 13, are disposed, in order as one faces the front, to the combustion cylinder 11. This minimizes the possibility of the occurrence of back fire even if an excess rate is decreased, enables to perform combustion in the vicinity of a theoretical combustion air amount, allows to obtain a wide combustion width, and permits stable combustion of the fuel.
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