Method and equipment used for refining of corn starch milk

Abstract

The invention provides a method and equipment used for refining of corn starch milk. According to different proportions of substances, three-phase separation is carried out through a cyclonic currenttube; a principle of concentrating and separating organic substances through an adsorption effect of the surface tension of bubbles is utilized, and suspending colloid, cellulose, protein, fat and thelike in the starch milk are removed by means of air flotation; through usage of a refining reactor and an ozone mixing tower, the functions of protein separation and ozone disinfection can be achieved at the same time; in refined starch, the content of 12-level underflow starch milk protein is 0.49%, the content of protein passing by an ash outlet of a suspension separator is 0.44%, the content of suspension underflow protein is 0.43%, the content of underflow passing by the refining reactor is 0.43%, the content of top-flow protein is 1.85%, and 15% of starch milk protein is extracted out; the yield of high-class products of commercial starch is increased. The effect of removing fine fiber in the starch milk is obvious, the starch milk sterilizing rate reaches 85%, the reduction rate ofsulfur dioxide is 60%, and the content of sulfur dioxide satisfies the national standard and reaches 30 ppm or below.

Description

technical field [0001] The invention provides a method for re-refining corn starch milk. The invention further discloses an equipment for re-refining corn starch milk, which belongs to the technical field of food processing. Background technique [0002] At present, the production of corn starch milk refining adopts one-time starch washing and refining. The principle is to use the difference in specific gravity of the suspension to pump it into the cyclone tube for static physical separation through a high-pressure pump. The physical separation efficiency is low and energy consumption is high, and the failure rate of high-pressure equipment is high. , there are potential safety hazards and high maintenance costs; the produced starch milk protein content is high, and there are many impurities, among which the content of sulfur dioxide is high at 80-100ppm, and then dehydration or sugar production is carried out. The filtrate after dehydration is concentrated to produce sugar o...

AI Technical Summary

Problems solved by technology

[0002] At present, the production of corn starch milk refining adopts one-time starch washing and refining. The principle is to use the difference in specific gravity of the suspension to pump it into the cyclone tube for static physical separation through a high-pressure pump. The physical separation efficiency is low and energy consumption is high, and the failure rate of high-pressure equipment is high. , there are potential safety hazards and high maintenance costs; the produced starch milk protein content is high, and there are many impurities, among which the content of sulfur dioxide is high at 80-100ppm, and then dehydration or sugar production is carried out. The filtrate after dehydration is concentrated to produce sugar or commercial starch, resulting Starch milk or commercial starch, protein and fat are high in impurities. This process route does not follow the principle of short process and first-in-first-out. The protein stays on the top of the tank for a long time, causing bacterial reproduction and rancidity, which seriously affects the quality of starch.

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