| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gasification method and gasification apparatus that can efficiently recover energy in the form of a combustible gas from a process of incinerating biomass, and can manufacture a sintered, granulated aggregate using incineration ashes as a raw material. <P>SOLUTION: In a circulating fluidized gasification furnace 2 for thermally decomposing biomass, sewage sludge b is thermally decomposed by high-speed diffusion, while supplying air or oxygen, at an air ratio of 0.1-0.7 and at a thermally decomposition temperature in the range of 450-850°C, and a thermally decomposed gas d is obtained by separating the fluidizing medium. The gas d is modified in a vertical circulating fluidized furnace for modification 3 while supplying oxygen c, at an oxygen ratio of 0.1-0.5 and at a reaction temperature in the range of 900-1,200°C, to form a combustible gas e2. A granulated material h obtained by granulating the ash g collected from the gas e2 is sent to the circulating fluidized furnace 3 by a feeding apparatus 62 to form a sintered, granulated aggregate i. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
