Anti-blocking screening machine for potassium nitrate production and processing

The utility model discloses an anti-blocking type screening machine for potassium nitrate production and processing, and relates to the technical field of screening machines, the anti-blocking type screening machine comprises a fixing seat, a supporting seat, a fixing cover and a feeding hopper, a driving motor is installed at one end of the outer wall of the fixing cover, and an output shaft of the driving motor penetrates into the fixing cover to be connected with a rotary drum; and an anti-blocking assembly which extends into the feeding hopper and is used for blocking the rotary drum is arranged above the rotary drum. Through the arrangement of the anti-blocking assembly, raw materials blocked in the screen holes can be blown by high-pressure airflow blown by the air spraying head, so that the raw materials fall off the screen holes, the anti-blocking operation of the screen holes is achieved, the raw materials in the discharging hopper can be blown by high-pressure airflow blown by the material conveying