Medium-speed grinding and pulverizing system for grinding high-moisture lignite

The medium-speed grinding and pulverizing system comprises a filtering assembly and a drying assembly, the filtering assembly comprises a drying box and a supporting plate, and the drying assembly comprises a feeding hopper, an air heater, a hot air pipe, a spray head, a rotating shaft, a stirring rod, a scraping plate, a connecting plate, a motor and a control plate; one end of the hot air pipe penetrates through one side of the drying box and extends into the drying box, and spray heads are evenly installed on the lower surface of the hot air pipe. Hot air can be blown into the drying box through the hot air pipe and the spray head, the temperature in the drying box is increased, one end of the output shaft of the motor rotates to drive the rotating shaft to rotate, then the stirring rod and the scraper blade are driven to rotate, the scraper blade can stir lignite on the bottom wall in the drying box, all the lignite moves, and the contact area between the lignite and the hot air is increased. The drying e