Exhaust device of dust removal system

The utility model relates to the technical field of exhaust, in particular to an exhaust device of a dust removal system, which adopts the technical scheme that the exhaust device comprises a main body box, a fixed rod and a cover plate, a PLC (Programmable Logic Controller) is arranged on the front end surface of the main body box, a filter box is arranged in the main body box, and communicated mounting ports are formed in the upper ends of the filter box and the main body box; the cover plate is mounted at the upper end of the main body box and located at the mounting opening, a filter screen is arranged at the lower end of the cover plate and comprises a frame structure, the filter screen extends into the filter box from the mounting opening, the fixing rod is mounted on the inner wall of the upper end of the filter box, a mounting plate is mounted at the tail end of the fixing rod, and a rotating shaft is rotatably mounted on the mounting plate; and fan blades are installed at the starting end of the rota