| 摘要 |
<P>PROBLEM TO BE SOLVED: To implement self-heat melting of low calorie refuse which has not been self-heat molten in the prior art without fuel such as kerosene, and to reduce exhaust gas quantity per heating value. <P>SOLUTION: According to this refuse gasifying and melting method, refuse is gasified taking oxygen as a gasifying agent in a fluidized bed type gasifying furnace 6, the obtained heat decomposition gas and solid content are burnt and melted in a melting furnace 9, and the exhaust gas in the melting furnace is discharged to the outside through a gas duct. Some of exhaust gas is extracted from the gas duct on the downstream side of the melting furnace 9, the extracted exhaust gas is supplied as the circulated exhaust gas to the fluidized bed type gasifying furnace 6 and the melting furnace 9, oxygen for combustion is supplied to the melting furnace 9, and the oxygen and the circulated exhaust gas are previously mixed to be supplied to the gasifying furnace and the melting furnace. The quantity of oxygen supplied to the gasifying furnace is controlled on the basis of the detected temperature of a fluidized bed. The temperature of the interior of the furnace or an outlet of the furnace in the melting furnace is detected, and the detected temperature is input to control the quantity of circulated exhaust gas supplied to the melting furnace. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
