Cleaning and filtering device

The utility model discloses a cleaning and filtering device which comprises a washing box, a ventilation column is fixedly connected to the interior of the washing box, a ventilation disc is rotatably connected to the inner side of the washing box, teeth are fixedly connected to the outer side of the ventilation disc at equal intervals, a rack is slidably connected to the interior of the washing box, the rack is connected with the teeth in a meshed mode, and a driving mechanism is arranged on one side of the washing box. The device has the advantages that due to the fact that the driving mechanism is additionally arranged, the output end of the motor drives the reciprocating lead screw to rotate, the reciprocating lead screw drives the adjusting block and the rack to move, the rack drives the teeth and the ventilation disc to rotate, and the ventilation disc is driven to rotate. According to the urea dust cleaning device, the position of a water spraying head at the bottom of a ventilation disc can be adjuste