Grain-Straw Separation using Air Stream (Part 1)

Basic Study on Separating Capacity

Abstract

A unique grain-straw separation system using air stream was devised. Grain-straw mixtures are fed on the screen conveyor which passes over the outlet of the air stream. The layer of mixtures is lifted up and loosened by the air stream. During the loosening of the mixture layer, the grains are separated from straws and dropped down through the screen conveyor.
In order to investigate the practicability of this separating method, basic experiments were conducted by a batch separation system. The relation between the motion of straw layer and the grain separation, and the effect of the amount of straw and the number and time of air stream application on separating capacity were clarified. As a result of this research, it was concluded that this method would be effective for the practical grain-straw separation.