CIRCULATING TYPE FLUIDIZED BED GASIFICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a circulating type fluidized bed gasification system which can easily control the circulation of a bed material. SOLUTION: The circulating type fluidized bed gasification system has a cylindrical gasification furnace 2 which extends from the upper part of a combustion furnace 1 for the introduction of a fuel and a bed material to the bottom 8 of the combustion furnace 1 and is open at the lower end; an air supply diffusion tube 15 which is provided at the middle stage of the combustion furnace 1 and fluidizes the introduced fuel and bed material to form a fluidized bed 14; and a steam supply injection nozzle 20 which is provided at the bottom 8 of the combustion furnace 1 and allows the bed material and unburnt fuel flowing drown from the fluidized bed 14 to move to the opening 6 of the gasification furnace 2 to move upward in the gasification furnace 2 and gasifies, during that time, the unburnt fuel or, if necessary, the fuel introduced into the gasification furnace 2. COPYRIGHT: (C)2005,JPO&NCIPI