Walnut shell micro-powder multi-particle-size-domain grading mechanism and device

The utility model discloses a walnut shell micro-powder multi-particle-size-domain grading mechanism and a walnut shell micro-powder multi-particle-size-domain grading device, and the walnut shell micro-powder multi-particle-size-domain grading mechanism comprises a grading box body, a Coanda block is arranged on one side wall of the grading box body, and an auxiliary nozzle connected with the topof the grading box body is arranged above the Coanda block and used for guiding external airflow into the grading box body; an electrode plate and a windward air pipe are respectively arranged at thetop of the grading box body; and a plurality of grading chambers with different particle grades are arranged at the bottom of the grading box body. The walnut shell superfine powder grading device isbased on the wall attachment principle of Coanda blocks, and the grading efficiency and the grading precision of walnut shell superfine powder are improved through auxiliary adjustment of electric field force and wind facing f