| 摘要 |
<p>PROBLEM TO BE SOLVED: To scarcely elute a heavy metal by melting an incombustible material and ash content to reduce in volume and renewing resources, in the case of treating waste containing combustible material and incombustible material, heat recovering, enhancing a generating efficiency, and volume reducing leaping flame containing the heavy metal. SOLUTION: Waste is treated in a shaft kiln type direct melting furnace 1 to generate thermally decomposed char and thermally decomposed gas, an incombustible material is melted, the char is partly or completely burned by oxygen, oxygen-enriched air or air and gasified in a char melting furnace 3 provided at a rear stage of the direct melting furnace, and ash content in the char is melted. A baking furnace 4 is provided together with the char melting furnace, completely burned with combustible gas from the melting furnace, sensible heat of the combustion exhaust gas is recovered by a boiler, and sent to a generating means. Leaping flames from the char melting furnace and the baking furnace are returned to the furnace 3 as needed, and melted to slag. Waste plastic is diffused to at least one of the direct melting furnace, the char melting furnace and the baking furnace.</p> |
