静态煤粉分离器中颗粒运动特性数值模拟研究  

Numerical simulation study on particle movement characteristic in static pulverized coal separator

作　　者：张峰彬 何亚群[1] 李红[1] 谢卫宁[1] 

机构地区：[1]中国矿业大学化工学院,江苏省徐州市221116

出　　处：《中国煤炭》2017年第12期115-122,共8页China Coal

基　　金：国家自然科学基金资助项目(51274196)

摘　　要：为了研究不同性质的颗粒在静态煤粉分离器内部的运动行为,利用Fluent数值模拟软件包,采用雷诺应力模型(RSM)和离散相模型(DPM)对分离器内的流场流态和不同粒度、密度颗粒的运动轨迹进行模拟,并从动力学角度分析了颗粒在第一分离区和离心分离区的运动状态,同时使用实验室静态分离器进行试验验证。研究结果表明,模拟数据与实验室实验数据结果匹配度良好,颗粒的密度越大在流场中的加速度越小,密度通过影响颗粒在流场中的运动,进而影响颗粒的分离效率;颗粒在第一分离区为单一的轴向运动,在离心分离区为复杂的三维旋转运动,湍流场对颗粒"鱼钩效应"的产生有一定的影响。In order to study the motor behavior of different particles in static pulverized coal separator, the authors simulated flow field characteristics in separator and motion curve with multi-granularity and density particles by using Renault Stress Model （RSM） and the Discrete Phase Model （DPM） of Fluent numerical simulation software package, analyzed particles＇ state of motion in first separation zone and centrifugal separation zone by dynamic perspective, and also conducted an experimental verification by using lab static separator. The results showed that the simulation data had great matched-degree with the experimental results. The larger the density of the particles, the smaller the acceleration in the flow field. According to affecting the movement of the particles in the flow field, the density affected the separation efficiency of the particles. The particles were axial movement in first separation zone, but were complex three dimension rotational movement in the centrifugal separation zone. Thus the turbulence field had a certain effect on the generation of particle ＂fish-hooks＂.

关 键 词：静态分离器 数值模拟 颗粒密度 鱼钩效应 

分 类 号：TQ534[化学工程—煤化学工程]