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A kind of sweet potato starch impurity removal production process

A sweet potato starch and production technology technology, applied in the field of sweet potato starch removal and separation production technology, can solve the problems that the ash content index can only be controlled at more than 0.4%, the protein is more than 0.2%, etc., so as to maintain the natural state of existence and nutritional value, product The effect of quality improvement and good economic benefits

Active Publication Date: 2016-05-04
河南新天豫食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the impurity removal processes and devices used by various production enterprises mainly include: single-stage sand removal device plus cyclone, multi-stage sand removal device plus cyclone, multi-stage sand removal device plus high-speed disc separator, single-stage sand removal device Equipment plus cyclone plus high-speed separator, etc., the ash index of sweet potato starch products produced by the above process can only be controlled above 0.4%, protein above 0.2%, and fineness below 98%, although the potato starch standard promulgated by the country is basically qualified. , but as the main indicators of refined sweet potato starch, such as ash, protein and fineness, if the impurity removal process and equipment are further optimized and combined, there is still a lot of room for improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The sweet potato starch impurity removal production process of the present invention, for the sweet potato starch milk after cleaning, crushing and sieving, is processed according to the following flow process, to remove the ash content, protein and pectin content therein:

[0028] ①Use the integrated three-stage desander to remove the sand and soil impurities in the sweet potato starch milk by using the difference in material specific gravity, and reduce the ash content in the starch product; the starch emulsion enters the desander along the tangential direction, and the specific gravity of starch and water is relatively small. Discharged from the top, the specific gravity of the silt enters the lower silt collector to separate the silt from the starch;

[0029] ②A two-stage high-speed disc separator is used. For the starch emulsion that has undergone sand removal treatment, the centrifugal force generated during the high-speed rotation of the disc separator and the den...

Embodiment 2

[0032]The difference between the impurity removal production process of sweet potato starch in this example and that in Example 1 is that in step 1), three stages and twelve groups of sand removers are used for sand removal treatment: the concentration of starch emulsion is controlled at 8°Be′ -10°Be′ enters the primary desander, the slurry inlet pressure is controlled between 0.35MPa-0.4MPa, the light phase liquid discharged from the top of the primary desander enters the secondary desander; in turn, the secondary desander The light phase liquid enters the third-stage desander, and the sand content in the mud and sand collector at the lower part of the third-stage desander has less sediment and then enters the first-stage desander, and the cycle works to make the concentration of the light-phase liquid discharged from the top of the third-stage desander Control it at 6°Be'-8°Be'. By adjusting the valve to control the drop of slurry feeding pressure and concentration (so that ...

Embodiment 3

[0034] The difference between the production process of sweet potato starch in this example and Example 1 or Example 2 is that in step 2), a two-stage six-group high-speed disk separator is used to remove the ash and protein content in the starch milk: three The starch emulsion discharged from the top of the desander with a concentration of 6°Be'-8°Be' enters a separator, and the feed flow rate is controlled at 25-28m 3 / hour for the first stage separation;

[0035] Then dilute the starch emulsion with a concentration of 18°Be'~20°Be' after the primary separation to a concentration of 6°Be'-8°Be', and then enter the next separator for concentration and separation. The sweet potato protein and other non-starch substances inside are discharged from the light phase liquid port.

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PUM

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Abstract

The invention relates to an impurity removing and separating method of starch. The impurity removal production process of sweet potato starch comprises the following steps of cleaning, crushing and sieving sweet potato starch milk; removing sandy impurities through a three-stage sand remover according to the difference in specific gravity of starch and sandy soil in the sweet potato starch milk; processing the starch emulsion subjected to sand removal through a two-stage disc type separator, separating protein and pectin light impurities from the starch size according to the density variation of starch material, protein and pectin, so as to reduce the protein and pectin impurity contents in the finished starch; and finally removing the protein and insolubility fiber impurities in the starch whey by the positive backwash washing method through a multi-stage cyclone separator. The impurity removing and separating method of starch is completely carried out based on the difference of physical properties of components in the starch milk, and does not add any chemical components such as acid and alkali during the whole process, so that the safety and the environmental protection are ensured; in addition, the purity and the fineness of the finished starch are effectively improved.

Description

technical field [0001] The invention relates to a method for removing impurities and separating starch, in particular to a production process for removing impurities and separating sweet potato starch. Background technique [0002] With the development of the economy and the improvement of living standards, people have higher and higher requirements for food quality, and sweet potatoes are more and more popular with people because of their unique high nutritional value. Sweet potato production is a labor-intensive crop. Due to the limitation of labor costs in foreign countries, especially developed countries, the planting area is extremely small. The high-purity sweet potato starch and its products processed and produced in China are favored by foreign food processing enterprises. [0003] Domestic sweet potato processing enterprises are devoting themselves to the processing and production of high-purity sweet potato starch in order to stabilize the domestic and foreign mark...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B30/04
Inventor 赵天学王志华张宗现刘相春
Owner 河南新天豫食品有限公司
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