A multi-stage separation dust removal device for paddy pretreatment

Abstract

The application discloses a multi-stage separation type dust removal device for paddy pretreatment and particularly relates to the technical field of paddy dust removal. The device is provided with a light impurity separation unit. The upper push plate conducts first receiving, scattering and guiding of the falling paddy. The upper air outlet blows oblique air flow to the light impurity separation area, so that the light impurity deviates from the falling track of the main grain and moves to the direction where the chip removal port is located. The remaining paddy and the light impurity which is not completely separated continue to fall to the area of the lower push plate. The lower push plate conducts second receiving, turning and guiding of the paddy which is pushed by the upper push plate. The paddy changes the movement posture under the action of the lower push plate and is thrown again. The reverse oblique air flow blown by the lower air outlet separates the residual light impurity again. The paddy can be thrown in different directions twice during the falling process, the material dispersion is increased, the effective path of the separation of the light impurity and the main grain is prolonged, the light impurity is more easily exposed to the air flow, and the separation efficiency of the light impurity is improved.

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