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Problems of wheat peeling and flour making technology

2021-10-07

Although wheat peeling flour has many advantages, but the application is not common, mainly because the process performance of wheat peeling machine can not meet and achieve the peeling process requirements, the peeling effect has been unsatisfactory, which leads to peeling flour process can not meet the requirements of the flour making process. First of all, wheat peeling machine is the key equipment of wheat peeling and flour making technology, NZ series wheat milling machine is the choice of domestic stereotypes NS type rice milling machine, not to adapt the development of wheat milling machine. The current problem is low output. When the peeling rate is >9%, the yield drops by about half, and it is easy to cause blockage, and it is difficult to control the peeling rate precisely. Secondly, there is no obvious separation layer between the cortical layer and the endosperm structure, instead, the two are tightly bonded, so it is obvious that the cortical layer cannot be removed like hulling grain. At the same time, because of the irregularity of the shape of the wheat kernel, which has a groove containing 1/4-1/3 of the whole epidermal tissue, it is difficult to peel the skin including the groove without breaking the endosperm.
Again, due to uneven peeling, the seed coat is still retained. In particular, about 30% of the seed coat in the ventral groove of wheat has to be removed from the flour path, and it is wrong to think that "the residue mill and flour cleaning system can be eliminated" after wheat peeling. In fact, because the high fiber content of the exocarp is peeled off, the bran between the flour is thin and fragile, and the endosperm on the drum skin is difficult to scrape, and the seed skin with pigmentation is more difficult to be separated from the flour than the traditional method, which affects the color and ash content of the flour. At the same time, due to uneven peeling, some of the endosperm starch is exposed and the viscosity is high, which makes the wheat easy to form arching and lumping, and makes the flour processing difficult. Due to the use of short milling path for strong grinding, the processing accuracy is low, and the flour output rate is more than 4% less than that of the advanced traditional process abroad, and the ash content of the uniform flour is more than 0.1% higher. The clogging of sieves by peelers, leakage of wheat or lower peeling rate, and The situation of the barn arching needs to be improved. The technical characteristics and process settings of the grinding rolls also need to be further improved in view of the changes in grain properties after wheat peeling.
The technical characteristics and process settings of the corresponding grinding rolls also need to be further improved.