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Preparation method for concentrating corn steep liquor

A corn steep liquor and corn kernel technology, which is applied in the fields of biochemical equipment and methods, food preparation, food science, etc., can solve problems such as low concentration of thick corn steep liquor

Active Publication Date: 2012-12-05
COFCO GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to overcome the low defect of the concentration of thick corn steep liquor prepared by the prior art, and provide a kind of preparation method of high concentration thick corn steep liquor

Method used

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  • Preparation method for concentrating corn steep liquor

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preparation example Construction

[0010] The preparation method of the concentrated corn steep liquor provided by the present invention comprises soaking corn kernels, concentrating the corn steeping liquid, wherein, the method for concentrating the obtained corn steeping liquid comprises evaporating the corn steeping liquid, and the evaporation method comprises adopting a falling film evaporator to The corn steeping liquid is concentrated to 40-45% by weight, and the obtained 40-45% by weight corn steep liquor is concentrated to 48-52% by weight using a scraped film evaporator; preferably, a falling film evaporator is used to soak the corn steep liquor The liquid was concentrated to 40-42% by weight, and the obtained 40-42% by weight corn steep liquor was concentrated to 48-50% by weight by using a scraped film evaporator.

[0011] According to the present invention, the evaporation method only needs to ensure that the concentration of the obtained corn steep liquor is 40-45% by weight, preferably 40-42% by we...

Embodiment 1

[0027] This example is used to illustrate the preparation method of the concentrated corn steep liquor provided by the present invention.

[0028] (1) Raw material pretreatment

[0029] Corn raw material (moisture content 14% by weight) is transported by the bucket elevator into the initial cleaning screen, iron remover, plane rotary cleaning screen for screening, stone removal, magnetic separation and other purification processes;

[0030] (2) Soak

[0031] After the purified corn is metered, it is hydraulically transported to the soaking tank, and is countercurrent soaked with a sulfurous acid aqueous solution with a concentration of 0.25% by weight. There are 10 soaking tanks, and the capacity of each tank is 50 tons of the above-mentioned purified corn raw materials. Part of the soaking liquid in the soaking tank circulates itself through the pump, and a part flows in the opposite direction to the added corn, that is, the newly added corn is soaked with old acid. Long-te...

Embodiment 2

[0036] This example is used to illustrate the preparation method of the concentrated corn steep liquor provided by the present invention.

[0037] Carry out raw material pretreatment and soaking corn according to the method for embodiment 1, difference is:

[0038] The 50°C corn soaking liquid extracted from the soaking tank (about 25m3 per tank) 3 , dry content is 8% by weight), pumped into the fourth effect falling film evaporator in the multi-effect evaporation system (controlling the flow of corn soaking liquid is 6.2m 3 / h), at a heating temperature of 70°C and a vacuum of 0.068MPa, the corn soaking liquid is cyclically heated and evaporated to obtain a four-effect corn slurry liquid with a concentration of 10% by weight and a four-effect juice vapor at 52°C , the four-effect juice vapor is connected to the vacuum pump through the tube condenser, and the four-effect corn slurry liquid is extracted (the flow rate of the control feed liquid is 5-6m 3 / h) and preheated to ...

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Abstract

The invention provides a preparation method for concentrating corn steep liquor. The method comprises the following step of: soaking corn kernels, and concentrating to obtain a corn soaking solution, wherein according to the step of concentrating the obtained corn soaking solution, the corn soaking solution is evaporated; and according to the step of evaporating the corn soaking solution, the corn soaking solution is concentrated to be 40 to 45 weight percent by using a falling-film evaporator, and 40 to 45 weight percent of corn steep liquor is concentrated to be 48 to 52 weight percent by using a scratch board film evaporator. By the method, the problem that when the corn steep liquor is concentrated by using the falling-film evaporator, a heating pipe of the falling-film evaporator is easy to block by the high-concentration concentrated corn steep liquor due to high viscosity is solved, and the concentration of the corn steep liquor is improved to the appropriate concentrated concentration by utilizing the characteristic of the scratch board film evaporator skillfully to obtain the concentrated solution of the high-concentration corn steep.

Description

technical field [0001] The invention relates to a preparation method of concentrated corn steep liquor. Background technique [0002] Corn steep liquor is one of the important by-products of wet milling corn starch production, and it is also the first by-product extracted in starch production. It is obtained by concentrating corn steeping water, which is actually an extract of corn. The appearance of the corn steeping water is brown liquid, the dry matter content is about 5-8% by weight, and the main components are mostly corn soluble protein and its degradation products, such as peptides, various amino acids, etc., and also contain lactic acid, vegetable oil, etc. Calcium and magnesium salts, soluble sugars have high nutritional value and can be used as microbial culture media in the fermentation industry, but most of them are used as animal feed additives. [0003] Because the concentration of corn soaking water is low, it is not convenient for storage, transportation and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/10A23K1/14C12N1/00A23L7/10
Inventor 岳国君郝小明罗虎艾咏平徐兆勇娄新建郜培鲁艳秋高占争王旭
Owner COFCO GROUP
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