机收膜杂混合物分离装置设计与试验

Design and test of separation device for mechanically collecting membrane miscellaneous mixture

针对目前膜杂分离装置存在分离率较低、含杂率高的问题,设计一种膜杂混合物分离装置。介绍膜杂分离装置的整机结构及工作原理,阐述关键部件滚筒筛的结构及参数确定,并对其进行运动学分析,确定影响膜杂分离率和含杂率的主要作业因素。制作试验样机,以滚筒筛进风口风速、滚筒筛倾角以及转速作为试验因素,以膜杂分离率和含杂率为试验指标,开展正交试验。试验结果表明:影响膜杂分离率和含杂率的主次顺序为滚筒筛进风口风速、滚筒筛倾角和转速,最优参数组合为滚筒筛进风口风速10 m/s、滚筒筛最优倾角10°以及滚筒筛转速45 r/min,在较优因素组合参数下进行重复验证试验,结果表明,膜杂分离率为92.4%,含杂率为6.5%。

Aiming at the problems of low separation rate and high impurity content in the current membrane impurity separation device,a membrane impurity mixture separation device was designed.This paper introduced the whole machine structure and working principle of the membrane impurity separation device,elaborated on the structure of the key components of the trommel screen and the determination of the main structure and parameters,and carried out a kinematic analysis to determine the main operating factors affecting the separation rate of the membrane impurity and impurity rate.The test prototype was made,and the wind speed at the inlet of the tumbler screen,the tilt angle of the tumbler screen and the rotational speed of the tumbler screen were taken as the test factors,and the membrane impurity separation rate and the impurity rate were taken as the test indexes to carry out the orthogonal test,and the test results showed that the main and secondary orders affecting the separation rate of the membrane impurities and the impurity rate were the wind speed at the inlet of the tumbler screen,the tilt angle of the tumbler screen and the rotational speed of the tumbler screen,and the optimal parameter combinations through the analysis of the tests were wind speed at the inlet of the tumbler screen.The optimal combination of parameters is drum screen inlet air velocity of 10 m/s,drum screen optimal inclination angle of 10°and drum screen rotational speed of 45 r/min.The repeated validation tests have been carried out under the optimal combination of parameters,and the results show that the membrane impurity separation rate is 92.4%and the impurity rate is 6.5%.