Processing method of whole sweet potato flour

Abstract

The invention discloses a processing method of whole sweet potato flour, characterized by comprising the following steps: washing fresh sweet potatoes by water; continuously crushing the raw materials by a crusher to material pulp with particle size of 0.5-10mm; then conveying the material pulp to a colloid crushing or grinding device and crushing the pulp to sweet potato slurry with particle size less than 1000 microns; uniformly mixing the sweet potato slurry and the whole sweet potato flour product with the weight ratio of 1:1 to 1.6; drying the mixed materials in the pneumatic drier at 120-180 degrees centigrade until water content therein is less than or equal to 15% by weight percentage; then sieving the dried sweet potato flour and the sieved object is the whole sweet potato flour product; the invention has simple processing technique; the prepared whole sweet potato flour product retains nutritional ingredients in the sweet potato and active ingredients for improving immunity of human body with maximum extent, being a fine, environmental and health-care food.

Description

technical field [0001] The invention belongs to the preparation of food or food material, and relates to a processing method of whole sweet potato powder. It is suitable for the production of whole powder series products of sweet potato or similar raw materials. The prepared whole sweet potato powder can be brewed in boiling water and eaten immediately or directly processed or added to other raw materials for processed food. Background technique [0002] In the prior art, there are mainly two kinds of whole potato powders: sweet potato powder and potato powder. Among them, the existing potato powder is made into snowflake powder or granular powder, and the investment in equipment is large, which is several times that of the present invention. Production The cost is more than 2 times higher than that of the invention, the product price is high, and it cannot enter the mass consumer group, so it is difficult to form large-scale production. Because the ingredients of sweet pot...

AI Technical Summary

Problems solved by technology

The main disadvantages and deficiencies of the above-mentioned prior art methods are: (1) it is necessary to pre-cook, blanch or microwave the sweet potato to process the mature pulp, and then dry it to make a whole powder. The actual whole powder is cooked powder

The main purpose of the curing process: first, to prevent the sweet potato from browning due to the long processing and drying time, which will affect the appearance of the whole sweet potato powder; second, the whole powder obtained by curing and drying can be fully rehydrated when brewing; The content of sugar and pectin is rich, and the viscosity of cooked sweet potato pulp is high. No matter it is made of puree or added with dispersant, it is also easy to agglomerate and difficult to crush in the subsequent drying process, which affects the effect of brewing and rehydration and the quality of production. efficiency

(2) Whole powder needs to be processed after peeling or peeling, because sweet potatoes are rich in fiber, pectin and other ingredients, and these ingredients are difficult to slice, dice, mash or conventional crushing methods in the prior art To achieve a more delicate taste, it is necessary to remove the sweet potato skin before processing; but it is difficult to automatically remove the sweet potato skin by machine in actual processing. Even if the steam peeling method can be used to peel the skin, the whole powder will dry out after peeling The yield of finished products is reduced by about 20-30%, and the waste residue will cause great environmental pollution in actual production

(3) The production steps include: sweet potatoes are washed, sliced ​​or diced, ripened or blanched, mashed or muddled, dried in a drying room, backfilled, roller or tempered spray, etc. The production time cycle is long, and the vitamins in sweet potatoes If the heating times are many and the time is long, the nutrients in the sweet potato will lose a lot

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