Internally-circulating flowing choking and buffering type biomass circulating fluidized bed

The invention discloses an internally-circulating flowing choking and buffering type biomass circulating fluidized bed. The internally-circulating flowing choking and buffering type biomass circulating fluidized bed comprises a boiler body. A ring of annular-shaped flowing choking and buffering blocks are arranged on the inner wall of the boiler body along the circumferential direction. A plurality of annular-shaped flowing choking and buffering blocks are arranged and the plurality of annular-shaped flowing choking and buffering blocks are distributed at intervals along the inner wall of the boiler body from bottom to top. Pins are welded on the inner wall of the boiler body and the annular-shaped flowing choking and buffering blocks are fixed on the inner wall of the boiler body by the pins. According to the fluidized bed, the plurality of annular-shaped flowing choking and buffering blocks are added in the boiler body, so that the problems such as low unit load, low evaporation heat transfer efficiency, lo