| 摘要 |
PROBLEM TO BE SOLVED: To provide a gasification reacting furnace reducing the amount used of expensive porous fine particles and controlling temperatures of a fuel pyrolysis furnace and a gasification furnace with a convenient method. SOLUTION: The circulating fluidized bed gasification reaction furnace, in which raw material is gasified in the fluidized bed gasification furnace, produced char and a fluidizing medium are introduced into a fluidized bed combustion furnace of a subsequent step to combust an uncombusted content and the reheated fluidized medium is circulated in the reaction furnace, includes a pyrolysis furnace having a tar absorption furnace and the fuel pyrolysis furnace on the upper and lower sides respectively on the precedent step of the fluidized bed gasification furnace, wherein a fluidizing medium containing uncombusted char taken out of the fuel pyrolysis furnace of the lower stage and a fluidizing medium, to which the tar is adsorbed, taken out of the tar absorption furnace of the upper stage are circulated respectively independently and, further, at least one side of respective fluidizing media which are separated from a cyclone of the subsequent step of the fluidized bed combustion furnace and have higher temperatures, is distributed and supplied to the pyrolysis furnace and the fluidizing bed gasification furnace so as to control the temperatures of the pyrolysis furnace and the fluidized bed gasification furnace. COPYRIGHT: (C)2011,JPO&INPIT
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