Middle -size and small -size circulating fluidized bed boiler

The utility model discloses a middle -size and small -size circulating fluidized bed boiler, the induction cooker comprises a cooker bod, annular a plurality of overgrate air spouts of evenly having arranged on the furnace body lateral wall, the overgrate air spout is connected with the secondary air channel, be provided with two sets of compound wind spouts about the furnace body of overgrate air spout top on the lateral wall relatively, compound wind spout is connected with compound tuber pipe, compound tuber pipe includes outer tuber pipe and overlaps at the intraductal interior tuber pipe of exogenous wind, interior tuber pipe is connected with the secondary air channel, the exogenous wind union coupling has the female pipe of industrial waste gas, be provided with the booster fan on the outer tuber pipe. The beneficial effects of the utility model are that: changing overgrate air spout position, will shifting up the overgrate air spout and adopt hierarchy treatment, the fractional combustion that has inc