DUAL FLUIDIZED BED REACTING SYSTEM WITH LOW OXYGEN RECYCLE LINE OF FLUE GAS WITHOUT OXYGEN

摘要

The present invention relates to a dual fluidized bed reactor including a spiral wing, in the dual fluidized bed reactor including a spiral wing according to the present invention, raw materials such as combustible waste and biomass are injected into the inside through a raw material input unit, and a fluid medium flows therein. Steam flows into the lower space to form a bubble flow layer, the gasification of the raw materials to produce gas generated therein, and the bubble flow bed gasifier above the bubble flow layer, so that the fluid flows into a swirling flow. The moving medium and the char contained in the generated gas are transferred from the spiral fixed blade and the bubble fluidized bed gasifier, and the char is burned by receiving air to increase the temperature of the fluid medium. And a high-speed fluidized bed combustion furnace that discharges the high-temperature fluidized medium to the bubble fluidized bed gasification furnace, and some of the exhaust gas discharged from the exhaust gas cyclone is removed from oxygen and then supplied back to the raw material tank.