METHOD AND APPARATUS FOR MELTING WASTE

PROBLEM TO BE SOLVED: To provide a technique for the waste melting treatment, suppressing the consumption of cokes and also suppressing any blow-by phenomenon by providing a fire grate between a drying shaft part and a furnace bottom part. SOLUTION: In a waste melting method by a shaft furnace type waste melting furnace, wastes and lump carbon-based combustible substances are fed from a furnace top part, oxygen source is fed from a tuyere of a furnace bottom part, molten ashes in the wastes and non-combustible substances are allowed to flow from a tap hole of a hearth, and the gas is discharged from the furnace top part. Gas generated in a fire grate part 2 and a thermal decomposition residue melting unit 3 is passed through the wastes charged from the top part and filled in a drying shaft part 1 to dry the wastes, the gas passed through the wastes is discharged from the top part, and the wastes dried in the drying shaft part 1 are subjected to the thermal decomposition by the fire grate part 2 to generate the thermal decomposition residues. The thermal decomposition residues generated by the fire grate part 2 are fed, and burned and melted with a coke bed formed in the thermal decomposition residue melting unit 3 as a heat source. COPYRIGHT: (C)2010,JPO&INPIT