Internal circulation type waste heat utilization device for steam flue gas of thermal power plant

The utility model relates to the technical field of waste heat utilization devices, in particular to an internal circulation type waste heat utilization device for steam flue gas of a thermal power plant, which comprises a circulation assembly, the circulation assembly comprises an exhaust pipe, a gas guide pipe and a suction fan, the exhaust pipe is fixedly inserted into the side face of a machine body, the gas guide pipe is fixedly connected to the right end of the exhaust pipe and arranged in a water storage tank, and the suction fan is arranged in the water storage tank. The suction fan is arranged at the right end of the air guide pipe; the heating assembly comprises a machine body, a water storage tank and an air inlet pipe, the water storage tank is arranged on the side face of the machine body, and the air inlet pipe penetrates through the water storage tank and is fixedly connected with the side face of the machine body in an inserted mode. And then heat of the water in the water storage tank is abso