Thermal load adjusting system for dense-phase region of circulating fluidized bed boiler

The invention discloses a thermal load adjusting system for a dense-phase region of a circulating fluidized bed boiler. The thermal load adjusting system comprises a boiler body, a high-pressure fluidization fan, a heat storage tank and a thermal load adjusting device, the thermal load adjusting device comprises an air distribution plate, a double-working-medium air cap, a dense-phase region buried pipe and a side wall heat exchange pipe. The air distribution plate is connected with a high-pressure fluidization fan; the double-working-medium air cap is provided with an air medium channel and a water medium channel, and an air inlet of the air medium channel is communicated with the interlayer cavity; a water inlet/outlet of the water medium channel is connected with the heat storage tank through a first circulating water path; a water inlet and a water outlet of the dense-phase area buried pipe are connected to the front side wall and the rear side wall of the furnace body correspondingly and connected with t