摘要
叶轮分级机因结构简单、操作和维护方便被广泛应用,但其结构与原理的不同,所对应的参数设置也有差别。利用Fluent软件结合叶轮分级机的流场特性,选用离散相模型中的非耦合计算方法,通过控制分级机进风口风速大小和分级叶轮的转速2个变量,对不同粒径颗粒的自由轨道运动轨迹进行模拟,并分析计算收集效率和分级效率。研究结果表明,当进风速度为4 m/s时,在1 200 rad/s转速下收集效率最好;8 m/s进风速度收集效率最高的转速为1 400 rad/s;进风速度为12 m/s时,在400~2 000 rad/s任何转速下收集效率都是100%;而对于牛顿分级效率来说,进风速度为8 m/s和分级叶轮转速为1 200 rad/s时分级效果最好。
Impeller classifiers are widely used for their simple structure, easy operation and maintenance,but their structure and principle differ, and the corresponding parameter settings also differ. Using Fluent software combined with the flow field characteristics of the impeller classifier, the uncoupled calculation method in the discrete phase model was selected. By controlling two variables, the air velocity magnitude of the classifier inlet and the rotational speed of the classifier impeller, the free orbit motion trajectories of different particle sizes were simulated and the collection efficiency and classification efficiency were analyzed and calculated. The research results show that when the inlet air speed is 4m/s, the best collection efficiency is at 1 200 rad/s speed;the highest collection efficiency at8 m/s inlet air speed is 1 400 rad/s;at 12 m/s inlet air speed, the collection efficiency is 100% at any speed from 400-2 000 rad/s;and for Newton classification efficiency, the best classification effect is at8 m/s inlet air speed and 1 200 rad/s classifying impeller speed.
作者
张健
秦显柱
唐钞发
唐明
Zhang Jian;Qin Xianzhu;Tang Chaofa;Tang Ming(Guilin Hongcheng Mining Equipment Manufacturing Co.,Ltd.,Guilin 541199,China)
出处
《煤矿机械》
2023年第1期80-83,共4页
Coal Mine Machinery
基金
广西创新驱动发展专项资金项目(桂科AA19254010)。
关键词
叶轮分级机
流场
运动轨迹
收集效率
分级效率
impeller classifier
flow field
movement track
collection efficiency
classification efficiency
