Method and device for fluidized bed vaporization and smelting burning

Application Number: 00108378
Application Date: 2000.05.11
Publication Number: 1271074
Publication Date: 2000.10.25
Priority Information: 1994/4/15 JP 101541/1994; 1995/2/9 JP 22000/1995; 1994/3/10 JP 65439/1994
International: F23C10/00;F23G5/30;F23G5/46
Applicant(s) Name: Ebara Corp. (J)
Inventor(s) Name: Hirayama Shonoro;Oshita Takahiro;Tame Chikagyuki
Patent Agency Code: 11038
Patent Agent: liu jinhui
Abstract A combustion method and apparatus in which combustible matter, e.g., waste matter, coal, etc., is gasified to produce a combustible gas containing a sufficiently large amount of combustible component to melt the ash by its own heat. A fluidized-bed furnace (2) has an approximately circular horizontal cross-sectional configuration. A moving bed (9), in which a fluidized medium settles and diffuses, is formed in the central portion of the furnace, and a fluidized bed (10), in which the fluidized medium is actively fluidized, is formed in the peripheral portion in the furnace. Combustible matter (11) is cast into the upper part of the moving bed (9) and gasified to form a combustible gas while circulating, together with the fluidized medium. The amount of oxygen supplied to the fluidized-bed furnace (2) is set so as to be the same contained in an amount of air not higher than 30% of the theoretical amount of combustion air. The temperature of the fluidized bed (10) is maintained at 450 DEG C. to 650 DEG C.