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Process for washing starch in process of producing corn starch

A production process, the technology of corn starch, applied in the field of starch washing process, can solve the problems of consumption, more coal, increase production cost, etc., and achieve the effect of saving steam, promoting energy saving and emission reduction, and saving production cost

Inactive Publication Date: 2011-09-21
山东华义玉米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water temperature needs to be heated during the washing process. In the prior art, the fresh water used for starch washing is generally heated by steam, which consumes a lot of coal and increases the production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] First, reverse osmosis treatment is performed on the raw water, that is, after 2.5 square meters of groundwater is filtered through the ion interception of the reverse osmosis membrane, purified water with a conductivity of 25 is obtained; in the closed water cycle process of corn processing, the material must pass through the operation of pumps and high-speed rotating equipment. , the process water temperature reaches 50°C; in the starch washing process, the temperature rise of the starch washing water is realized by the heat exchange of the process water, that is, a plate heat exchanger is added between the process water tank and the raw water tank, 15m 3 / h high temperature process water 50℃ and 30m 3 / h reverse osmosis washing water at 18 ℃ is handled by a heat exchanger to exchange heat energy.

Embodiment 2

[0014] First, reverse osmosis treatment is performed on the raw water, that is, after 5 cubic meters of groundwater is filtered through the ion interception of the reverse osmosis membrane, purified water with a conductivity of 30 is obtained; in the closed water cycle process of corn processing, the materials have to pass through the operation of pumps and high-speed rotating equipment Finally, the temperature of the process water reaches 53°C; in the starch washing process, the temperature rise of the starch washing water is realized by the heat exchange of the process water instead of steam, that is, a plate type heat exchanger is installed between the process water tank and the raw water tank. heater. Specific washing water cooling design: 18m 3 / h high temperature process water 53℃ and 30m 3 / h Reverse osmosis washing water exchanges heat energy through a plate heat exchanger at 19°C.

Embodiment 3

[0016] First, reverse osmosis treatment is performed on the raw water, that is, after 2.5 cubic meters of groundwater is filtered through the ion interception of the reverse osmosis membrane, purified water with a conductivity of 35 is obtained; in the closed water cycle process of corn processing, the materials have to pass through the operation of pumps and high-speed rotating equipment Finally, the temperature of the process water reaches 55°C; in the starch washing process, the temperature of the starch washing water is changed from the steam to the heat exchange of the process water, that is, a plate type heat exchanger is installed between the process water tank and the raw water tank. heater. Specific washing water cooling design: 20m 3 / h high temperature process water 55℃ and 30m 3 / h Reverse osmosis washing water at 20°C exchanges heat energy through a plate heat exchanger.

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PUM

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Abstract

The invention belongs to the field of starch production, in particular relates to a process for washing starch in a process of producing corn starch. The invention overcomes the defects, and provides the process for washing the starch in the process of producing the corn starch that fresh water is heated by a heat exchanging system instead of live steam. In the invention, the fresh water is heated by the heat exchanging system instead of the live steam, and through the thermal transmission of exchanging plates, washing water is heated while the temperature of water in the process is controlled.

Description

technical field [0001] The invention belongs to the field of starch production technology, in particular to a starch washing process in the production process of corn starch. Background technique [0002] Corn starch is generally used in food processing and fermentation industry. It is widely used in food processing and is the main raw material in fermentation industry. [0003] The production process of corn starch is divided into: removing impurities from corn → soaking in acid → separating germ and fiber → extracting protein → starch washing → drying and packaging. Among them, in the starch washing process, there are still some insoluble proteins, soluble proteins or inorganic salts in the starch milk after protein separation. The operation of the washing section determines the quality of the starch, and the choice of washing water is an important factor. The water temperature needs to be heated during the washing process. In the prior art, the primary fresh water for st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B30/04
Inventor 周秀华王玉娥侯兵
Owner 山东华义玉米科技有限公司