Filtering device for toluene recovery system

The filtering device comprises a filtering shell and a cleaning structure, the cleaning structure comprises a first motor, the first motor is fixedly connected to the bottom of the filtering shell, the output end of the first motor is fixedly connected with a rotating shaft, the surface of the rotating shaft is fixedly connected with a rotating plate, and one end of the rotating plate is fixedly connected with a sliding block; the surface of the sliding block is in sliding connection with a fixed ring plate, the fixed ring plate is fixedly connected to the side wall of the inner cavity of the filter shell, the bottom of the rotating plate is fixedly connected with a cleaning brush, a filter screen for a toluene recovery system is arranged below the cleaning brush, and the filter screen is fixedly connected to the side wall of the inner cavity of the filter shell. The first motor can drive the cleaning brush to rotate, so that the cleaning brush is used for cleaning the filter screen, the filter screen is prev