Rice mill's discharging mechanism Embryo rice mill uses rice bran to separate and discharge the material after the whitening is completed. Through the wind row, the quality of polished rice can be improved, and the rice temperature can be reduced and broken rice can be reduced before whitening. Germ rice milled rice output El adopts pressure gate mechanism, which is composed of adjusting plate, spring, adjusting rod and returning device. The gap at the outlet is small and the outlet pressure is large, that is, the pressure in the white room is large, which is beneficial to improve the whitening effect, but it will reduce the rate of leaving the embryo. On the contrary, if the outlet gap is large, the effect is opposite. At the same time, the reflux device can return the polished rice with low quality after the first time to the white room, and perform secondary whitening or multiple white grinding. The whitening effect is not obvious when the first time it is whitened, and it mainly plays the role of roughening, and the remaining embryo rate is about 99%. Starting from the second whitening, with the increase in the frequency of whitening, the rate of embryos remained essentially linearly reduced, the milling effect was enhanced, and the peeling capacity was correspondingly strengthened, but the damage to the germ was also increased. Under normal circumstances, after three times of whitening, the rate of remaining embryos should be above 80%, and the whitening requirement should be achieved.
Influence of material properties on the rate of retained embryos Some properties of the material to be processed are also important factors affecting the rate of retained embryos. Such as the choice of rice, the moisture content of brown rice, brown rice and so on. For japonica rice and japonica rice, the grain structure of japonica rice is tighter, and the binding force between the embryo of japonica rice and endosperm is more resistant to rolling than japonica rice, so that during the process of milling, the japonica rice germ is not easy to be grinded off. In addition, the shape of the japonica rice is short and thick, and the japonica rice is slender. The contact area of ​​the former is smaller than that of the latter. This makes the germination part of the glutinous rice smaller than that of the glutinous rice, and the probability of retaining the germ is improved.
The moisture content of brown rice is low, the shrinkage of the embryos is reduced, and the possibility of being dropped off by collisions is reduced. Therefore, reducing the moisture content of brown rice is also beneficial for leaving the embryos. The water content of brown rice should be controlled at about 13.5%. Dry milling is difficult and the broken rice rate is high. When wet (water content is greater than 15%), the adsorption capacity of embryo and endosperm is weakened due to the difference in the adsorption capacity of embryo and endosperm. At the same time, moisture absorption and expansion cause the germination area of ​​the germ to increase. It is processed and the rate of remaining embryos is reduced.
The structure of fresh rice is tighter than that of aging rice. Due to the differences in the temperature and water expansion coefficients of the rice embryo and endosperm, the binding strength of the germ and endosperm of Chen Mi affected by changes in temperature and moisture throughout the year will also be affected. Decline, so Chen Mi stay embryo rate is lower than the new rice.
The germ rice mill is a small-scale rice processing machine that can minimize the texture of rice grains while minimizing the crushing phenomenon in rice processing, increasing the rice output rate, and improving the accuracy of rice. It can provide an advanced, applicable, economical, and efficient rice processing machine for urban supermarkets, families, and rural small rice processing professionals. It can also improve the production performance and mechanical performance while maintaining the nutrient content of rice grains. Edible food satisfies people's demand for eating healthy rice and fresh rice.
The main parameters affecting the embryo retention rate in the design of embryo rice mill are: whitening gap, grind roller structure, and temperature rise of grinding; the main process parameters affecting the retention of embryo rate in operation are: export size, air volume, and number of whitening.
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