Patent ID: 6161490
Filing Date: 2000-12-19
Classification: C10J,C10K,F23G,F23J

Abstract:
An apparatus for gasifying wastes, said apparatus comprising:a fluidized-bed gasification furnace 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 of from 550.degree. C. to 850.degree. C., to thereby generate combustible gas containing char; anda swirling melting furnace to gasify the combustible gas and char generated in said fluidized-bed gasification furnace at a temperature of from 1200.degree. C. to 1600.degree. C., said swirling melting furnace comprising:a combustion chamber having an internal width dimension;an introduction section to receive the combustible gas and char from said fluidized-bed gasification furnace and to form in said introduction section a swirling flow of the combustible gas and char including a concentrated cylindrical layer of char, said introduction section being integral with said combustion chamber and positioned above and coaxial therewith, and said introduction section having an internal width dimension smaller than said internal width dimension of said combustion chamber such that the swirling flow of combustible gas and char including the concentrated cylindrical layer of char is supplied from said introduction section into said combustion chamber and maintained therein;blowing nozzles, in said combustion chamber at a position below said introduction section, to blow an oxygen-containing gas tangentially toward the concentrated cylindrical layer of char in said combustion chamber, thereby to gasify efficiently the char as well as the combustible gas, to generate a further combustible gas composed primarily of H.sub.2 and CO, and to generate slag from incombustible portions of the char;a slag separation chamber connected to a lower portion of said combustion chamber to cool and separate the slag generated in said combustion chamber; anda discharge to discharge the further combustible gas from said swirling melting furnace.