| 摘要 |
PURPOSE:To improve heat efficiency with the secondary combustion of unburnt material and eliminate labor required for cleaning without sticking of the unburnt material to pipings and walls by introducing catalysts promoting the secondary combustion of unburnt material into a fluidized bed. CONSTITUTION:High temp. exhaust gas flows in from the inflow port 2 of a heat exchanger mainbody 1 and is brought in a uniform direction by a per forated gas distributing plate 3 and then is blasted up into the upper part of the exchanger 1. Fluidized material such as quartz sand, etc. is blasted by this gas and a fluidized bed 4 is formed. Heat medium such as water, etc. flowing through a heat exchanging piping 6 in the bed 4 is heat-exchanged with the exhaust gas. At that time, catalysts 5 are floated and scattered in the bed 4 and are brought in contact with the unburnt material of fuel contained in the exhaust gas and the unburnt material is activated and burnt. Thereby, the unburnt material is brought in secondary combustion to improve heat efficiency. Sticking of the unburnt material to pipings and inner walls is eliminated and labor required for cleaning can be saved.
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