CATALYST COMBUSTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a catalyst combustion device with simplified structure, capable of improving efficiency by reduction of incurring of a heat loss, shortening a warming-up time, and preventing a problem on NOx and CO from occurring. SOLUTION: This steam mixture pipe 7 is a swirler to swirl combustion air for supply. This catalyst combustion device comprises a variable swirler 20 to vary a revolution angle, and an ignition plug 6 to ignite main liquid fuel. Main liquid fuel is vaporized and mixed with combustion air. In this case, the catalyst combustion device comprises a steam mixture pipe 7 to form a burner 7A for starting at an internal part; at least three different catalysts 8-9 wherein a heat resisting temperature is increased to a low temperature, a middle temperature, and a high temperature, in order, with the progress of a flow of the heat resisting temperature from a portion situated upper stream to a position situated downstream; a combustion gas outlet duct 11; an exhaust heat heat-exchanger 19; and a combustion gas air-fuel mixture introduction passage 12 to guide combustion gas and fuel-air mixture of fuel and air from a spot situated upper stream from the low heat resisting temperature catalyst 8 to a high temperature mixing part 22 between the catalyst 8 and the middle temperature catalyst 9.