| 摘要 |
PROBLEM TO BE SOLVED: To provide a catalytic combustion heating equipment in which a catalyst can be heated efficiently by stabilizing the combustion by a pilot burner, and by using generated exhaust combustion gas, which is returned partly after shifting to a steady operation to well preheat the premixed gas and improve the thermal efficiency. SOLUTION: A premixed gas of the liquid fuel injected from a fuel nozzle 18 and combustion air introduced into an inner tube 11 is ignited by an ignition equipment 19 in the case of a pilot combustion. In the pilot combustion, the generated exhaust combustion gas heats the catalyst, but the exhaust combustion gas is not returned to the peripheral space of the inner tube 1. While in the case of the steady combustion, the exhaust combustion gas is returned though an exhaust combustion gas return tube 12 to the outer peripheral space of the inner tube 11 to heat it, and fuel adhered to the internal peripheral face of the tube 11 is vaporized, and the premixed gas is preheated, and mixed with exhaust combustion gas by a mixing equipment 15 to be starred and mixed, the mixture is sent to a catalytic combustion device 17 in a catalyst tube 16 to carry out a catalytic combustion.
|
