Boiler flue gas waste heat recovery structure

The utility model relates to the technical field of boilers, in particular to a boiler flue gas waste heat recovery structure. The problem that waste heat cannot be recycled is solved. An inlet is formed in the front end of the bottom of the furnace body; an outlet is formed in the top of the furnace body; both the inlet and the outlet are communicated with the working cavity; a cover plate for covering the inlet is hinged in the furnace body; a waste heat cavity controlled by a pneumatic butterfly valve to be connected and disconnected with the working cavity is formed in the heat conduction shell, one end of the waste heat cavity communicates with the outer end of the furnace body, and a baffle covers an opening in the outer end of the waste heat cavity. According to the waste heat recycling device, waste heat can be recycled, heat can flow into the waste heat cavity conveniently, waste heat and smoke are facilitated, resource waste is avoided, and pollution to the environment is reduced. 本实用新型涉及锅炉技术领域，尤其是指