Calcined coke dust collecting device

The utility model relates to the technical field of petroleum coke processing, and discloses a calcined coke dust collecting device which comprises a support, a ventilation pipe is fixedly connected to the top of the support, an air pump is arranged on the right side of the ventilation pipe, and a reserved seam is formed in the right side of the top end of the ventilation pipe. According to the device disclosed by the utility model, impurities falling from the upper part can be ground through the matching among the reserved seam, the ventilation pipe, the filter screen, the bracket, the first motor, the first gear, the second gear, the first grinding roller and the second grinding roller, so that the problem that the practicability is reduced due to blockage caused by sucking a larger raw material into the funnel is solved; and through cooperation of a ventilation pipe, a second motor, a bevel gear, a bevel gear, a conical gear ring, a first fixing ring, an annular groove and a scraper, dust attached to the i