Same-cavity integrated vertical high-speed multistage superfine pulverizing device and method for walnut shells

A same-cavity integrated vertical high-speed multistage superfine pulverizing method for walnut shells, comprising:

• lifting the walnut shells after being broken to remove kernels to a wedge-shaped gap of a first-stage coarse crushing region, so that the walnut shells receive high-speed collision, shearing and extrusion effects of fine-pitch longitudinal trapezoidal teeth of a stator and a rotor in a process of sliding down along the wedge-shaped gap when the size of the walnut shells is the same as the size of a certain position of the wedge-shaped gap, and the walnut shells are crushed into coarse particles to fall into a second-stage fine crushing region to realize coarse crushing;
• enabling the coarsely crushed walnut shell particles to slide down along an inner wall since the second-stage fine crushing region is a multistage wedge-shaped direct-through gradually reducing gap, along with gradual reduction of the gap, enabling the coarse particles to receive the high-speed shearing and extrusion effects of fine-pitch transverse sharp patterned teeth on a stator and a rotor, and further crushing the coarse particles into fine particles;
• sliding the fine particles to a third-stage pneumatic impact micro pulverizing region, and enabling the fine particles to move at a high speed through receiving the strong-force carrying effect of a supersonic airflow, so that the walnut shell fine particles violently rub and collide with each other in the process;
• enabling the particles to receive strong collision by spiral gratings rotating around a lower main shaft at a high speed during high-speed drifting, rebounding the collided particles to a rough barrel wall for repeated collision and rubbing, finally pulverizing the particles into microparticles, and enabling the microparticles to enter a fourth-stage airflow mill superfine pulverizing region along with an upward spiral airflow;
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• enabling the walnut shell microparticles entering the fourth-stage airflow mill superfine pulverizing region to receive high-speed collision and rubbing in a subsonic airflow mill to be further pulverized into superfine powder ascending along with the airflow, and attracting out powder particles meeting a particle size requirement through negative pressure attraction greater than centrifugal force through screening by grading blades.