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Production method for controlling content of SO2 contained in starch without adding oxidants

A production method and SO2 technology, which are applied in the field of food processing, can solve the problems that the sulfur dioxide concentration in finished products easily exceeds the standard, the water pollution is large, the soaking time is long, etc., and the food safety requirements are met, the water pollution is small, and the soaking time is short. Effect

Active Publication Date: 2010-10-27
中粮生化能源(榆树)有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0008] The invention discloses a production method for controlling and reducing the content of sulfur dioxide in starch, so as to solve the problem that the concentration of sulfur dioxide in the prior art is high, the residue of sulfur dioxide in the finished product is easy to exceed the standard, it is difficult to control, the pollution of water is large, the soaking time is long, and the energy consumption is large; The traditional method of adding hydrogen peroxide or other oxidants to remove SO2, S elements in starch products and oxidant residues and other issues

Method used

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  • Production method for controlling content of SO2 contained in starch without adding oxidants

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Effect test

Embodiment 1

[0017] Such as figure 1 Shown: The present invention purifies corn and sulfurous acid into the steeping tank.

[0018] The first step: the concentration of sulfurous acid used for soaking the corn is 0.05%, and the soaking time is 30 hours; after soaking, the moisture of the corn reaches 45%, and the SO2 content is = 340ppm, and it is sent into the conveying water tank;

[0019] The second step: the filtrate of the scraper centrifuge is separated by a clarification centrifuge, and the supernatant with an SO2 concentration of 30 ppm enters the delivery tank as water for the soaked corn to wash the soaked corn to reduce the SO2 content of the soaked corn.

[0020] Step 3: The washed water in the conveying water tank and the soaked corn enter the desanding cyclone together. Through the action of centrifugal force, the corn and water are discharged from the upper part of the desanding cyclone and enter the dehydration screen for dehydration. The dehydrated corn enters the crushing...

Embodiment 2

[0023] Purified corn and sulfurous acid go into steeping tanks;

[0024] The first step: the sulfurous acid concentration used for soaking the corn is 0.10%, and the soaking time is 20 hours; after soaking, the moisture content of the corn reaches 43%, and the SO2 content is = 330ppm, and it is sent into the conveying water tank;

[0025] The second step: the filtrate of the scraper centrifuge is separated by a clarification centrifuge, and the supernatant with an SO2 concentration of 40 ppm enters the delivery tank as water for the soaked corn to wash the soaked corn to reduce the SO2 content of the soaked corn.

[0026] Step 3: The washed water in the conveying water tank and the soaked corn enter the desanding cyclone together. Through the action of centrifugal force, the corn and water are discharged from the upper part of the desanding cyclone and enter the dehydration screen for dehydration. The dehydrated corn enters the crushing process. system, the water returns to th...

Embodiment 3

[0029] The invention purifies corn and sulfurous acid into the soaking tank.

[0030] The first step: the sulfurous acid concentration used for soaking the corn is 0.08%, and the soaking time is 25 hours; after soaking, the moisture of the corn reaches 43.6%, and the SO2 content is = 338ppm, and it is sent into the conveying water tank;

[0031] The second step: the filtrate of the scraper centrifuge is separated by a clarification centrifuge, and the supernatant with an SO2 concentration of 37 ppm enters the delivery tank as water for the soaked corn to wash the soaked corn to reduce the SO2 content of the soaked corn.

[0032] Step 3: The washed water in the conveying water tank and the soaked corn enter the desanding cyclone together. Through the action of centrifugal force, the corn and water are discharged from the upper part of the desanding cyclone and enter the dehydration screen for dehydration. The dehydrated corn enters the crushing process. system, the water return...

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Abstract

The invention discloses a production method for controlling the content of SO2 contained in starch without adding oxidants. In the production method, purified corns and sulphurous acid is processed by the following steps of: firstly, soaking corns in a soaking tank for 20-30 hours with the sulphurous acid with the concentration of 0.05-0.10 percent, and delivering the soaked corns into a delivery water tank; secondly, introducing the supernate of the filter liquor of a scraper centrifuge into the delivery water tank, and washing the soaked corns, wherein the supernate is separated by a clarifying centrifuge; thirdly, introducing water inside the delivery water tank after washing and the soaked corns into a desanding whirlcone, discharging the soaked corns and the water from the upper part of the desanding whirlcone under the action of centrifugal force to enter a dewatering screen for dewatering, and processing the dewatered corns in a grinding system and returning the water to the delivery water tank; discharging gravels and the water positioned at the bottom of the desanding whirlcone into a settling tank, and enabling overflows of the settling tank to enter a dilute corn steep liquor storage tank and finally enter an evaporation system for evaporation concentration. The invention has the advantages of starch SO2 content being not more than 30 ppm, few sulfur dioxide residuals, starch containing no oxidants, less waste water pollution, shorter steeping time and energy saving.

Description

technical field [0001] The invention belongs to the technical field of grain processing, and relates to a method for controlling SO in starch without adding an oxidizing agent. 2 The production method of the content is especially suitable for the production of starch in which the content of sulfur dioxide is reduced by controlling the wet milling of starch. Background technique [0002] The traditional corn starch wet milling process finished dry starch goes through cleaning, soaking, corn coarse crushing, germ separation, corn grinding, starch sieving, protein separation and starch washing, centrifugal separation and drying process. [0003] In the corn soaking process, sulfur dioxide is used as a soaking agent in the soaking water; sulfur dioxide will remain in the finished starch, and the sulfur dioxide content in starch is an important indicator of starch food safety. The residual sulfur dioxide in the finished product is generally controlled at 35PPM-45PPM. Controlling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/00C08B30/02
Inventor 佟毅王伟李久仁温志刚白岚
Owner 中粮生化能源(榆树)有限公司
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