Swirling-type melting furnace and method for gasifying wastes by the swirling-type melting furnace

An apparatus for gasifying wastes, said apparatus comprising:

• a fluidized-bed gasification furnace to form a revolving flow of a bed material and to gasify at least one waste selected from the group consisting of municipal waste, refuse-derived fuel, plastic waste, FRP waste, biomass waste, and automobile waste at a temperature from 550° C. to 850° C., to thereby generate combustible gas containing char;
• and
• a swirling melting furnace to gasify said combustible gas and char generated in said fluidized-bed gasification furnace at a temperature of from 1200° C. to 1600° C., said swirling melting furnace comprising:
• a combustion chamber to form a swirling flow of said combustible gas and char supplied from said fluidized-bed gasification furnace and to gasify said combustible gas and char by blowing an oxygen-containing gas toward said swirling flow;
• and
• a slag separation chamber connected to a lower portion of said combustion chamber to cool gas and slag generated in said combustion chamber and to separate the slag;
• wherein said slag separation chamber has a gas guide tube therein, a gas outlet in a side thereof, a water tank on a bottom thereof, and a slag outlet at the bottom thereof, and said gas and said slag generated in said combustion chamber flow downwardly in said gas guide tube and are blown into water in said water tank to be cooled, and then said cooled gas is discharged from said gas outlet and said cooled slag is discharged from said slag outlet.