Dry method processing process and device for corn

Abstract

Disclosed is a dry processing technique for corn. The dry processing technique mainly consists of the procedures of cleaning, quality adjustment, husking, degermination and breaking, germ selection and grit extraction The husking procedure successively consists of hull removal by stirring for the first time, dampening and hull removal by stirring for the second time. When dampening, water accounting for 0.5-5% of the weight of the corn is added to the corn using a dampener (9)and the water temperature is 10-60°C; and after dampening, the procedure of hull removal by stirring is performed within 10 min. During the procedure of hull removal by stirring, the height of the corn is controlled to be 0.5-3 m, stirrers (8, 1, 12, 15) are employed, and the linear velocity of the stirrer rod is controlled to be 1-6 m / s. The technique can improve the yield rate of corn grits with a fat content less than 1%, corn powder and germs with a purity of more than 80%.

Description

technical field [0001] The invention relates to a corn dry processing technology adopting stirring peeling and rolling peeling, which is suitable for a production line for crushing corn to produce corn grits, corn flour, corn germ and corn bran. Background technique [0002] There are two processing methods of dry and wet corn. The so-called wet processing refers to the method of producing starch and starch sugar products after soaking corn in water for tens of hours and then pulverizing them. Strict classification Except for the above-mentioned wet processing methods, all other processing methods including the processing method of corn for feed with only one crushing process belong to the category of dry processing. But now people usually say dry processing (comprising the so-called semi-wet processing with a small amount of wetting water) all refers to the processing method of producing corn grits and corn flour for human consumption, food industry and brewing industry. ...

AI Technical Summary

Problems solved by technology

Because the endosperm grains with a small amount of cortex and germ adhered to the pure endosperm grains of the same size and the germ grains with a small amount of cortex and endosperm adhered to the pure germ grains of the same size have similar densities and suspension speeds, it is difficult to separate them. The finished product rate of high-standard products in the corn dry processing industry in the world is very low (the data records that the average yield rate of corn grits and corn flour with a fat content of less than 1% in China is only 30%, and the highest in developed countries can only reach 45%, but Endosperm, which averages 0.8 fat in corn kernels, has an average of 83% fat!)

The low peeling rate in the peeling section and the output of broken grains during peeling are the root causes of the above-mentioned disadvantages in the prior art

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