Return valve of circulating fluidized bed boiler

The utility model relates to a return device of a circulating fluidized bed boiler and particularly relates to a return valve of a circulating fluidized bed boiler, which solves the technical problems of unreasonable structure and overhigh power consumption of the existing return valve. The return valve comprises a stand pipe, a baffling device, an air distribution plate, an air chamber and a return pipe, wherein the only one air chamber is arranged below the air distribution plate, the distance H1 between the lower edge of the baffling device and the lower edge of an air outlet of the return pipe is 300-600mm, the distance L between the two side surfaces in the horizontal direction of the baffling device is 150-250mm, the inner diameter of the return pipe is 0.9-1.0 time that of the stand pipe, the bore diameters of funnel caps are 3.0-3.5mm, an inner channel of a valve body has a square cross section, and a prefabricated support beam is arranged at the lower part of the baffling device. The return valve use