| 摘要 |
PROBLEM TO BE SOLVED: To provide a circulating fluidized bed type gasification method and apparatus capable of separately performing thermal decomposition and gasification of a material, enhancing the carbon conversion ratio by preventing suppression of a gasification reaction by a thermal decomposition gas and effectively using heat of a combustion exhaust gas. SOLUTION: A flowing medium separated by a medium separation apparatus 8 is returned to a gasification furnace 2 via a thermal decomposition furnace 15, and while the material is heat-exchanged with the combustion exhaust gas in a heat exchanger 14 for thermal decomposition to release a thermal decomposition gas containing a tar, it is fed to the thermal decomposition furnace 15 in which the fluidized bed 15a is formed by an inert gas and is further subjected to thermal decomposition to generate a thermal decomposition gas. The flowing medium containing the material in which the thermal decomposition gas is separated in the thermal decomposition furnace 15 is introduced into the gasification furnace 2, gasification of the material is only performed in the gasification furnace 2, and the flowing medium and an inflammable solid content are introduced into a combustion furnace 5. COPYRIGHT: (C)2011,JPO&INPIT
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