Device for incinerating sludge by using waste heat of waste incineration power generation flue gas

The utility model discloses a device for incinerating sludge by using waste heat of waste incineration power generation flue gas, which comprises a box body, a support plate fixedly mounted on the outer side of the box body, four support legs fixedly mounted at the bottom of the support plate, reinforcing rods fixedly mounted on opposite sides of the four support legs, and a steam generation kettle arranged inside the top of the box body, and the top of the box body is communicated with two exhaust pipes. Through arrangement of a spring and a hollowed-out plate, when sludge is placed on the top of the hollowed-out plate to burn, the spring applies elastic force to the bottom of the hollowed-out plate at the moment, the hollowed-out plate conveniently moves downwards according to the gravity of the sludge, a first threaded roller and a second threaded roller are matched, a certain distance is always kept between the sludge and the hollowed-out plate, and pushing of the first threaded roller and the second thre