中南大学学报（自然科学版）2018，Vol.49Issue(6)：1307-1314,8.DOI:10.11817/j.issn.1672-7207.2018.06.001
液固分选流化床内颗粒动力学方程的简化及应用
Simplification and application of particles kinetic equation for liquid-solid fluidized bed separator
摘要
Abstract
Magnitude comparison between the forces from the fluid exerted on particles in the liquid-solid fluidized bed separator (LSFBS) was carried out. Particles kinetic equation was simplified according to the comparison results and the characteristics of particles segregation process and flow field in the primary separation zone. The simplified kinetic equation was solved through the fourth order Runge-Kutta algorithm for particles with different densities and diameters. The results show that the magnitude order of pressure gradient force and added mass force can match that of inertia force or drag force while the influence of Magnus force, Saffman force as well as Basset force could be neglected on the particles' hindering their settling and separation results in LSFBS. The predicted results well agrees with the related experimental data, indicating that the simplification method for the kinetic equation used in the present work is reasonable and the hindered settling as well as the separation results of different particles in LSFBS can be predicted accurately by using the simplified kinetic equation.关键词
液固分选流化床/受力分析/动力学方程/量级比较/干扰沉降Key words
liquid-solid fluidized bed separator/force analysis/kinetic equation/magnitude comparison/hindered settling分类
矿业与冶金引用本文复制引用
孙铭阳,韦鲁滨,朱学帅,李大虎,李阳,刘俊丽..液固分选流化床内颗粒动力学方程的简化及应用[J].中南大学学报（自然科学版）,2018,49(6):1307-1314,8.基金项目
国家自然科学基金资助项目(51574252)(Project(51574252) supported by the National Natural Science Foundation of China) （51574252）
