SU1045956A1 - Method of air separation of granular material - Google Patents

Abstract

A METHOD OF AIR SEPARATION OF GRAIN MATEPHAJIA, which includes feeding the material, giving it a rotational movement, blowing the material into a tangential flow and, withdrawing separated fractions, characterized in that, in order to improve the quality of separation by increasing the time the material is in the separation zone simultaneously with the blowing of tangentially injected air flow, the grain material is affected by a system of axially swirled air jets, while the blowing of the tanga air flow introduced by parallel jets.

Description

The invention relates to methods of bonding, while forming a bright air separation of grain materials by aerodynamic properties and can be used in agricultural production and grain processing industry.

A known method of air separation of grain material, the impact on the material by a vortex flow and the output of the separated fractions fl].

I The disadvantage of this method is the inability to create high speeds, since there are large centrifugal forces, which leads to injury to the grain and low separation efficiency.

The closest in technical essence and the achieved result to the proposed one is the method of air separation of grain material, including feeding the material, giving it a rotational movement, purging the material with a tangentially introduced air flow and withdrawing the separated fractions d.

The disadvantage of this method (is the low quality of separation, 'The purpose of the invention is to improve the quality of separation by increasing the residence time of the material in the separation zone and reducing material injury.

This goal is achieved by the fact that according to the method of air separation of grain material, including the supply of material, addition *. giving him a rotational motion, purging the material with a tangentially introduced air flow and outputting the separated fractions * simultaneously with the purging; tangentially introduced air flow on the grain material is affected by a system of axially swirling air jets, while the tangentially introduced air stream is purged with parallel jets.

The method of air separation of grain material is as follows.

The initial grain material is fed into the separation zone, it is given a rotational movement. The grain material is purged with a tangentially introduced air flow and a system of axially swirling jets. The jets can be adjusted in speed and pressure, as well as in direction. twists. As a result of the interaction of axial swirling air currents and a system of ring jets, the air flow acquires a stable form, for example, a conoid of expressed energy levels. In the eon of separation, the grain material moves along ascending helical lines and, under the action of centrifugal forces, is distributed over various energy levels. With a certain ratio of forces ’acting on the grains, the rotation is separated from the air surface and grains are divided into fractions, each fraction moving along its flight paths. Large impurities under the action of centrifugal forces are discarded to the periphery 15 of the separation zone. Air is extracted from the central part of the separation zone and light impurities are removed.

Example. An air separation of the grain mixture, consisting of Saratovskaya 29 wheat, raisins and light weed, is carried out. The material is purged with a tangentially introduced air flow and a system of axially swirling air jets. Depending on the ratio of the velocities of the tangentially introduced air flow and the axially swirling jets, it is possible to obtain a different form of swirling flow, for example, a paraboloid of revolution. As a result of this, there are three velocity components: Uy is the peripheral speed, U], is the radial velocity, and is the vertical component of the VNIIIPI. Order 7608/7 ₉ p. As a result of this, when a grain material is introduced into the center of a paraboloid of revolution, the light component is abruptly carried up. Its speed of soaring is 3-4 m / s. Oatmeal, having a speed of soaring from b to 8 m / s, 40 blocks the speed of soaring of wheat grain (7.5-11.5 m / s). This increases the efficiency of separation from oatmeal. This is due to the fact that oats are lighter than wheat grains, and longer in length. Moving along the inner surface of the paraboloid of rotation, the weevil stabilizes the mid-section. · Along with this; the resulting centrifugal forces enhance the separation potential. If we take into account that the light component is carried out over the entire area of the paraboloid of rotation, then its high separation can be explained. The grain material, located on the generatrix surface of the paraboloid, does not interfere with the removal of the light component. The application of the proposed method of air separation of grain material will increase the efficiency. ^! Separation rate up to 72%, clarity 60 separation by 2%, reduce trauma to the grain material.

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Branch of the PPP Patent, Uzhgorod, Project 4,

Claims (1)

METHOD ________ _______> AIR SEPARATION OF GRAIN MATERIAL, including feeding the material, giving it a rotational movement, blowing the material through the tangentially introduced M-I air flow. the output of the separated fractions, characterized in that, in order to improve the quality of separation by increasing the time spent in the separation zone and reducing material trauma ^ simultaneously with the blowing of the tangentially introduced air flow, the system of axially swirling air jets acts on the grain material, while the blowing is tangentially introduced air flow is carried out in parallel jets. g £ Q e>