Photo-thermal coal-fired coupled sludge drying device

The utility model relates to the technical field of sludge treatment, and discloses a photo-thermal coal-fired coupled sludge drying device which comprises a bottom plate, a solar energy conversion mechanism and a drying mechanism, the drying mechanism is arranged at one end of the bottom plate and comprises a drying groove fixedly connected with the bottom plate, an air cylinder is arranged on the side edge of the drying groove, a piston rod of the air cylinder is fixedly connected with a push plate, guide rods are arranged on the two sides of the push plate, the push plate is arranged at the ends, close to the drying groove, of the guide rods, a rotating shaft is rotationally connected to the middle of the push plate, and a stirring rod is arranged at the end, close to the drying groove, of the rotating shaft; the solar energy conversion mechanism is arranged at one end, far away from the drying mechanism, of the bottom plate and comprises a solar energy converter fixedly connected with the bottom plate, an