Patent ID: 6283048
Filing Date: 2001-09-04
Classification: C10J,C10K,F23G,F23J

Abstract:
A method for gasifying waste, said method comprising:forming a revolving flow of a bed material in a fluidized-bed gasification furnace and gasifying at a temperature of from 550.degree. C. and 850.degree. C. at least one waste selected from the group consisting of municipal waste, refuse-derived fuel, plastic waste, FRP waste, biomass waste, and automobile waste, to thereby generate combustible gas containing char;introducing said combustible gas and char generated in said fluidized-bed gasification furnace into a combustion chamber of a swirling melting furnace and forming in said combustion chamber a swirling flow of said combustion gas and char, and blowing an oxygen-containing gas toward said swirling flow to gasify said combustible gas and char at a temperature of 1200.degree. C. to 1600.degree. C. in said combustion chamber;supplying gas and slag generated in said combustion chamber into a slag separation chamber of said swirling melting furnace, and introducing the gas and the slag into water in a water tank in said slag separation chamber by a gas guide tube provided in said slag separation chamber to cool the gas and the slag; anddischarging the thus cooled gas from a gas outlet of said slag separation chamber and discharging the thus cooled slag from a bottom of said slag separation chamber.