葡萄干颗粒和短穗轴的气流分离

Study on Separation of Raisins From Short Stems Using Air Stream

研究了葡萄干和短穗轴等杂质的空气动力学特性,分析了用气流分离葡萄干颗粒和短穗轴的可能性及短穗轴在气流中的运动过程。为了研究葡萄干颗粒的清选效果,设计了试验装置,并通过该装置对部分理论分析的结果进行了验证。在葡萄干的气流清选中,根据混合物中各成分空气动力学特性的差异合理选择工作参数,将使清选效果明显提高。

The aerodynamic properties of raisins,short stems and other impurity are measured experimentally by finding the suspension velocities of the particles in an air stream.The feasibility of the separation of raisins from short stems using air stream is determined.A method is proposed for analyzing the dynamic process of short stem in an air stream.A set of experimental devise is designed in order to in- vestigate the effectiveness of raisin cleaning and the result of theoretical analysis is verified by the experiment.Evidently,the effectiveness of cleaning can he increased by selecting suitable operation parameters based on the difference of the aerody- namic properties of raisins and short stems.