The function of the powder cleaning machine in the flour machine complete equipment is also crucial. The process effect of the powder cleaning machine is determined according to the screening rate of the screening material and the reduction rate of the wheat flour ash. In the daily production of flour processing equipment, the selection rate of the undersize is mainly used to guide the operation. Generally, the purification effect is judged by observing and comparing the quality status of the incoming materials and the undersize materials.
The selection rate of the undersize material is the percentage of the flow rate of the undersize material and the flow rate of the incoming material. The amount of flour entering the clearing machine is constant and the flow rate of the undersize material is larger, and the selection rate is higher. The screening rate is not as high as possible, and the appropriate screening rate should be selected.
When extracting wheat residue from the road surface, the selection rate is 75%~80%, the corresponding coarse wheat heart is 85%~90%, and the fine wheat heart is 80%~85%. When processing materials extracted from the middle skin mill, the selection rate should be reduced.
In the complete set of flour machine equipment, the equipment of the powder cleaning machine is in good condition, and the selection rate can be high. However, if the selection rate is too high, the quality of the sieve material will decrease. When the selection rate is too low, the quality of the sieve material is lower. Ok, but the flow rate of the heart-grinding system is reduced, the amount of high-quality flour is reduced, and the operation effect of the entire powder path will be deteriorated. If the flow rate of the machine is increased during the operation of the powder cleaning machine, the selection rate will decrease; if the air volume is reduced, the selection rate will increase accordingly, but the quality of the undersize will decrease.