SU1736975A1 - Method for obtaining swelling starch - Google Patents

Abstract

Use: food industry. SUMMARY OF THE INVENTION: Starch treatment is carried out on a disintegrating unit with disk rotors at a dosing rate of 1.3-1-7 kg / h and a collision speed of starch particles before leaving the disintegrator at 280-300 m / s. 1 tab.

Description

The invention relates to the production technology of swelling starches (NK), which can be used in the food industry and for various technical purposes.

One group of NCs are starches prepared by pre-gelatinising an aqueous suspension of starch and then drying the cdeister in a thin layer on a steam drum roller dryer.

The closest to the present invention is a method for producing NK, including preparing the raw material with its wetting, and sometimes with working off chemical reagents, gelatinising starch, forming a thin film of paste, drying it, destroying starch by grinding the dried film of paste to a powdered product and sifting the last.

The disadvantage of this method is the complexity of its implementation.

The purpose of the invention is to simplify the method.

The goal is achieved in that according to the method for producing swelling starches, including their mechanical destruction, mechanical destruction is carried out by treating the starting starch in a disintegrator with disk rotors at a feed rate of 1.3-1.7 kg / h of starch and striking speed of the starch particles before 280-300 m / s exit from the disintegrator.

The proposed method is carried out as follows.

Starch loaded into the bunker with a small amount of air enters the grinding chamber of the disintegrator through the dispenser and the inlet chute. In the grinding zone, he receives a series of blows from the grinding elements, which is crushed and flies to the periphery of the grinding chamber. The processed starch is discharged by air through the outlet chute to the cyclone, where it is separated from the air. From the cyclone, the starch enters the collection and is NC, ready to use.

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In the food industry, when assessing the quality of a NC, its water-holding capacity (WCS) has the greatest significance.

The study of the obtained starches under an electron microscope with a magnification of 120 kV showed that during the disintegrated grinding of starch there is a modification of the physical structure of its particles, expressed in the formation of spherical associates. The dense grains of untreated starch are transformed into empty balls with a clearly distinguishable two-layer structure, which is a layer of individual smaller, swollen particles that are surrounded by a shell with varying degrees of swelling. Starch with such a particle structure is able to quickly adsorb free water at room temperature and swell strongly. This is due to the fact that water, easily penetrating the relatively thin upper shell and the gaps between small particles, as if accumulates inside the balls, facilitating their swelling and adsorption of water from the outside.

PRI me R 1. Starch treatment is carried out on a disintegrator with a capacity of 10–15 kg / h with a collision output speed of 50–300 m / s on the last lap of a set of rotors. The disintegrator is equipped with 6-square square finger rotors. 1000 g of edible potato are loaded into the hopper of the dosing device.

starch with MAS 1.7 water per 1 g of the product. At the dosing unit, the dosing rate is set at 1.3 kg / h. After completing the set of inclusions required to start the installation, the rotational speed of the rotors is adjusted to a smooth speed of 20 thousand rpm, which corresponds to an output impact velocity of 280 m / s. Then the metering device is switched on. Starch loaded into the bunker with a small amount of air enters the grinding chamber of the disintegrator through the dispenser and the inlet chute. In the grinding zone, he receives a series of punches from the grinding elements, which results in crushing and flying to the periphery of the grinding chamber. The processed starch is expelled by air through the outlet chute to the cyclone, where it is separated from the air. From the cyclone, the starch enters the collection of products, which are NC, ready for use.

The results of the experiments and data on the MAS of the products obtained are presented in the table.

Claims (1)

Invention Formula A method for producing swelling starches, including their mechanical destruction, characterized in that, in order to simplify the method, the mechanical destruction is carried out by processing the original starch in a disintegrator with disk rotors at a feed rate of 1.3-1.7 kg / h of starch and speed collisions of starch particles before leaving the disintegrator 280-300 m / s.