Brief：1 .Furnace exit has parallel high temperature cyclone separator, stable running, high separation efficiency 2 .whirlwind pipes produced by imported refractory steel, high temperature resistance and wear resistance 3.Return feeder use U-type non mechanical valves, feed rate and feed back rate balance automatically, without human operation charging 4 .Large air cap was sat up for slag tube of Fluidized bed ,slag was fluidization in the tube, the slag pipe is not blocked 5. Preventing abrasion device was retrofitted both of Water wall tube at the lower part of furnace and smokestack , ensure the service life of the heating surface 6. Fluidized bed furnace and cyclone separator adopts fluidized bed wear-resisting mould brick and wear-resisting casting material , ensure long-term safe operation of boilers