| 摘要 |
PROBLEM TO BE SOLVED: To keep a temperature at the neighborhood of a melting furnace inner wall where a thermal decomposition gas and char flow and collide, to be higher than a melting temperature of ash even in the case of low calorific power of wastes, and to prevent erosion of a refractory material of a melting furnace outlet portion by preventing the erosion of refractory material of the melting furnace outlet portion. SOLUTION: The thermal decomposition gas generated by thermally decomposing wastes in a gasification furnace 1 and unburnt components (char) of fine particles are supplied to this rotary melting furnace 2 from a thermal decomposition gas nozzle 4, and burnt with the combustion air supplied from a combustion air nozzle 5, in the melting furnace 2. As a supply nozzle 14 for supplying an inert gas or a gas enriched in inert gas is mounted on a furnace wall surface at a downstream portion of the melting furnace, the rise of gas temperature at the melting furnace outlet portion 3 can be prevented while stably keeping the melting of ash in the melting furnace 2, thus the erosion of the refractory material at the furnace outlet portion 3 can be prevented. COPYRIGHT: (C)2006,JPO&NCIPI
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