COAL GASIFIER USING DOWNER REGION IN CIRCULATING FLUIDIZED BED REACTOR

摘要

PURPOSE: A coal gasifier using downer region in circulating fluidized bed reactor is provided to increase selectivity of generated gas through the separation of a combustion region and a gasification region, thereby increasing conversion efficiency of coal. CONSTITUTION: The coal gasifier comprises an ascending pipe(21) for causing a combustion reaction of coal, primary and secondary cyclones(22) connected to an upper end of the ascending pipe for collecting solid particles, a flow supply device(23) connected to a lower end of the cyclone for enabling uniform injection of the solid particles, a descending pipe(24) extending downward from the flow supply device for causing gasification of coal, a gas/solid separator(25) connected to a lower end of the descending pipe, and a solid recirculating portion(26).