A device and method for enriching and separating sugar grains from starch sugar by enzymatic method

Abstract

The invention discloses a separating device and a separating method for enzymatic starch sugar sugar-free grains enrichment. The separating device for the enzymatic starch sugar sugar-free grains enrichment is mainly composed of a saccharifying tank, a first sugar-free grains separator, a second sugar-free grains separator, a horizontal screw type centrifugal machine and a bleaching tank, wherein the first sugar-free grains separator and the second sugar-free grains separator have same structures, are both cylindrical cavity tank bodies, the cylindrical cavity tank bodies are both provided with reverse funnel shaped filtering devices, the reverse funnel shaped filtering devices are hollow vertebral bodies with small upper ends and big lower ends, and an included angle between conical faces of the vertebral bodies and the first sugar-free grains separator or the second sugar-free grains separator are from 10 degree to 25 degree, a plurality of opening holes are formed in the middle portions of the conical faces of the vertebral bodies, and lower portion densification areas, opening holes areas and upper portion densification areas are formed in the conical faces of the vertebral bodies from the bottom up. The separating method for the enzymatic starch sugar sugar-free grains enrichment includes: using the centrifugal machine to wash sugar-free grains filter cakes, wherein the washed sugar-free grains filter cakes adsorb and mingle with little sugar, and contain no inorganic additive, sending the sugar-free grains filter cakes to a vacuum drying oven or a pneumatic dryer and drying to moisture<=10%, and then smashing, sifting out, and packing so as to obtain solid sugar-free grains products which can be used as organic albumen nitrogen sources used for fodders or fermentation.

Description

technical field [0001] The invention relates to an enzymatic corn starch sugar production, in particular to the separation of corn starch sugar grains and sugar liquid, in particular to a sugar grain enrichment and separation device for enzymatic starch sugar and a separation method for the grain liquid. Background technique [0002] Corn is one of the three most important food crops in the world today, with a wide range of sources. Corn starch has high output and low price. At present, most starch sugar enterprises use raw corn starch as raw material for production. In China, large-scale starch sugar enterprises such as Luzhou Group, Xiwang Group, COFCO Group in the north and Guangzhou Shuangqiao Co., Ltd. in the south basically use corn starch as raw material for production by enzymatic processes. In the United States, almost all fermentation products such as starch sugar and ethanol come from the deep processing of cornstarch hydrolysis. Enzymatic production of starch s...

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Problems solved by technology

[0004] Sugar grains are the main by-product of corn starch sugar production, which have many adverse effects on the refining of sugar liquid and product quality: (1) The sugar grains produced in the liquefaction process remain in the sugar liquid, which will reduce the subsequent addition of glucoamylase and The chance of some substrates adsorbed by sugar grains interacting, the efficiency of saccharification is reduced

(2) At present, plate and frame filter press or vacuum drum filter are generally used in the sugar liquid filtration process. The existence of a large amount of viscous and high sugar grains will reduce the efficiency of the filter device and easily block the pipeline.

(3) At present, starch sugar production enterprises usually use diatomite or activated carbon as a filter aid to filter or press filter to remove sugar grains in the saccharification liquid. The resulting filter cake contains inorganic filter aids, and the protein content becomes lower and loses application value, and become a wet solid pollutant, easy to deteriorate and smelly, and costly to deal with, which becomes a burden on the enterprise. The removal and utilization of sugar grains is a common problem in the corn starch enzymatic sugar production industry.

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