Authors

Abstract

Aiming at the problem of high impurity content and loss rate of soybean cleaning. Taking SN52 soybeans as the research object, the wind sorting process under different inclination angles, wind speeds and inlet sizes was simulated by CFD-DEM coupled simulation combined with the single-factor control variable method. The simulation results show that: when the wind speed 17m/s, wind inlet size 220mm, the impurity rate with the increase of inclination angle and decrease, the loss of the first decrease and then increase; inclination angle of 21 °, wind inlet size 220mm, the impurity rate with the increase of wind speed and decrease, the loss of the same rate of the first decrease and then increase; inclination angle of 21 °, the wind speed of 17m/s, the impurity rate with the increase of wind inlet size and decrease, loss of the rate of the thrown first decrease and then increase Trend. Comprehensive data results show that the optimal combination of parameters for the wind speed of 17m / s, inclination angle of 21 °, wind mouth 220mm, this time the impurity rate of 1.59%, the loss rate of 0.26%, the efficiency of the cleaning and sorting up to 98.15%. The results of the study can provide a theoretical basis for the optimal design of the airflow soybean wind separator.

Abstract in Chinese

针对大豆清选含杂率及损失率较高的问题。以SN52号大豆为研究对象，采用CFD-DEM耦合仿真结合单因素控制变量法，模拟了不同倾角、风速及入风口尺寸下的风选过程。仿真结果表明：风速17m/s、风口大小220mm时，含杂率随倾角增大而降低，损失率先减小后增大；倾角21°、风口大小220mm时，含杂率随风速增加而降低，损失率同样先减小后增大；倾角21°、风速17m/s时，含杂率随风口大小增大而降低，损失率扔呈现先减小后增大趋势。综合数据结果可知，最优参数组合为风速17m/s、倾角21°、风口220mm，此时含杂率1.59%，损失率0.26%，清选效率达98.15%。研究结果可为气流式大豆风选机的优化设计提供理论依据。