In the process of processing the complete set of rice milling machine, the first process is to clean the stone, and the regulation of the rice flow during the decontamination process is very important for the cleaning of the rice. When the gravity is working on the stone machine, the material continuously enters the middle part of the stone screen surface from the feeding hopper. Due to the vibration of the screen surface and the air flow through the material layer, the porosity between the particles is increased, and the material is in a fluidized state. It promotes automatic grading, and the stone slab is in contact with the screen surface. The small proportion of grain floats to the upper layer. Under the promotion of gravity, inertia force and continuous feeding, it slides down to the net grain export; Under the action of the inertial force and airflow of the screen vibration system, it slides relative to the stone surface and moves to the selection area through the polylithic area.
(1) The thickness of the flow: the material is spread over the second sieve surface and moves in a wavy "boiling" state, and the lower layer reaches the half of the transparent glass observation window.
(2) The size of the reverse wind: control the anti-air blow, so that the cross and wheat form a clear dividing line (the stone area is generally about 5cm), the stone is normal, and the stone contains the grain compound requirement, that is, the normal working state, the opposite The distance between the blower door and the screen surface is about 15-20mm.
(3) Test of suspension speed: The kernels beat or feel good on the sieve surface.
