基于气-固两相数值模拟的SLK选粉机分级室研究  

SStudy on classifying housing of SLK air classifier based on air-solid two-phase numerical simulation

作　　者：李进春[1] 李双跃[1] 任朝富[2] 李洪[1] 

机构地区：[1]西南科技大学制造学院,四川绵阳621010 [2]绵阳西金科技发展有限公司技术中心

出　　处：《矿山机械》2009年第3期84-88,共5页Mining & Processing Equipment

基　　金：博士基金(07ZX0113);四川省科学基金项目(04JY029206021)

摘　　要：选取SLK选粉机分级室腔体作为计算域物理模型,采用标准K-ε湍流模型和随机颗粒轨道模型及其两相耦合求解对腔体内的气-固两相流进行数值模拟,在一定的边界条件下,研究了分级室壳体不同倾角以及含料气体从下锥体进入分级室的速度变化对分级室内气固分布的影响。结果表明,减小分级室壳体倾角有利于分级室内的气流上下分布均匀,含料气体从下锥体进入分级室的速度过大或过小都会引起分级室内颗粒浓度上下差异较大。进一步模拟比较得出:当分级室壳体倾角约为75°～80°,气流进入分级室的速度约为8～10m/s时,分级室内上下气固浓度和速度分布最均匀,有利于分级。此结果已通过实验验证并已在生产应用上取得良好效果。SLK classifying housing is taken to be the physics model.for computing field, by using of κ-ε model for air phase and Eulerian-Lagrangian model for solid phase, air-solid two-phase numerical simulation has been conducted. The results indicate that rninifying the obliquity of classifying housing can be favorable to well-distribution of airflow in the classifier housing, and too high or too low air velocity into the housing can lead to high concentration of particles either in the ceiling or the bottom of the housing, As the obliquity of classifying housing is 70° -80° and the inlet velocity is 8-10m/s, particles contained gas is fairly well-distributed in the housing, which is propitious to classification, These results had been proved by experiments, and good applied effect has been obtained.

关 键 词：选粉机 分级室 气-固两相流 数值模拟 两相耦合 

分 类 号：TD45[矿业工程—矿山机电]