Double-roller type petroleum coke screening crusher for decoking system

The double-roller type petroleum coke screening crusher comprises crushing rollers which are arranged in pairs and rotate oppositely, each crushing roller comprises a main shaft and a plurality of roller tooth mechanisms which are sequentially installed on a shaft body of the main shaft in the length direction of the main shaft, and the roller tooth mechanisms are arranged in a ring shape. The roller tooth mechanism comprises a plurality of roller teeth which are evenly arranged at intervals in the circumferential direction, the number of the roller teeth of the roller tooth mechanism is 10, the tooth height of the roller teeth is controlled to range from 120 mm to 140 mm, the diameter of an inner ring of the roller tooth mechanism is controlled to range from 660 mm to 700 mm, the width of the wide position of each roller tooth is controlled to range from 60 mm to 80 mm, and the width of the narrow position of each roller tooth is controlled to range from 35 mm to 40 mm, so that block coke with the particle s