The grain becomes brown rice after husking, and the brown rice becomes rice after removing most of the cortex and part of the embryo, and the surface of the white rice grains also has a small amount of bran powder, which affects the appearance quality of the rice, storage and the taste of the rice made, so it is necessary to remove this part of the bran powder through the "polishing" process. Super popular rice polisher
Polishing is one of the key processes of clean rice processing, because polishing can remove the bran powder on the surface of rice grains, proper polishing can make the starch gelatinization on the surface of rice grains, showing a certain light, currently the most used is rice polishing machine.
The main structure of various types of polishing rice machines is much the same, mainly composed of a spray water part, polishing part, water supply system and air spray mechanism, feed device and discharge device is also important devices of various types of polishing rice machine.
1. Spray water part: spray water part is composed of nozzle, nozzle cleaner, water mixer, feeding spiral, mixing roller, etc. When the material passes the flow time, the flow is measured, thus controlling the amount of water added.
2, polishing part: The polishing part is the core part of the polishing machine, by the feeding spiral, polishing roller, eight pieces of rice sieve composed of octagonal sieve barrel, discharge pressure door, and so on.
The polishing roller is divided into iron roller and sand roller according to the material properties, and the design should make it clear that the linear speed of the sand roller is higher than that of the iron roller (the linear speed of the iron roller is about 5m/s, the polishing pressure is higher, and the average value is 0.1MPa. The linear speed of the sand roller is about 15m/s, and the polishing pressure is low, with an average value of 0.02MPa).
Source: Online/GFMM
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