Self-cleaning crystallizer

The utility model discloses a self-cleaning crystallizer which comprises a base, bearing columns are fixedly installed on the two sides of the top of the base, a crystallizing tank is fixedly installed between the two bearing columns, and the top of the crystallizing tank is rotationally connected with a rotary drum through an opening. An electric telescopic rod drives a stirring rod to ascend through a traction plate, a motor is controlled to be started after the stirring rod ascends to make contact with one side of the bottommost supporting plate, at the moment, the motor drives the stirring rod to rotate, the stirring rod rotates to make contact with the supporting plate to drive a scraping plate to rotate, and the scraping plate rotates to achieve the effect of scraping crystals attached to the inner wall of the crystallizing tank; the self-cleaning effect is achieved, the stirring blades cannot make contact with crystals at the bottom of the inner cavity of the crystallizing tank after rising, and the si