Patent ID: 7318382

Claim:
A method of incinerating a waste material, having the steps of combusting a portion of the waste material placed in a gasification furnace having an interior space substantially isolated from an exterior space and subjecting the other portion of the waste material to dry distillation with heat produced by the combustion of the portion of the waste material, and introducing a combustible gas generated by the dry distillation into a combustion furnace disposed outside said gasification furnace and combusting the combustible gas in the combustion furnace, wherein oxygen required to combust the combustible gas introduced into said combustion furnace is supplied depending on the amount of the combustible gas into the combustion furnace to combust the combustible gas, and the amount of oxygen supplied to said gasification furnace is controlled depending on a change in the temperature in the combustion furnace such that the temperature in the combustion furnace is kept at a predetermined temperature, for thereby adjusting the amount of the combustible gas generated by the dry distillation, said method being characterized in that, said gasification furnace comprises an air-cooled gasification furnace, said method being characterized by the steps of: supplying combustive oxygen heated by a heat exchange with waste gases from said combustion furnace, to cool said gasification furnace; performing a heat exchange between the combustive oxygen supplied to cool said gasification furnace and the waste gases from said combustion furnace, and supplying the heated combustive oxygen to said gasification furnace and/or said combustion furnace, said predetermined temperature being set to a temperature at which incineration residues produced when the waste material is incinerated are meltable; and charging said incineration residues into the combustion furnace from an incineration residue charging port thereof to melt the incineration residues with the heat generated when the combustible gas is combusted, while the combustible gas is being combusted in said combustion furnace, and discharging a melted material converted from the incineration residues out of the combustion furnace from a melted material outlet thereof and cooling the melted material into a solid material, further characterized in that said incineration residues are gradually charged into said combustion furnace after the temperature in said combustion furnace rises to a temperature close to said predetermined temperature after the dry distillation of said waste material is started in said gasification furnace.