滚筒冷渣器内颗粒床运动状态的离散单元法模拟  

DEM simulations of solid motion in rotary drum ash cooler

作　　者：白珏明 刘柏谦[1,2] 白珏莹 谭培来[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学北京高校节能与环保工程研究中心,北京100083 [3]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《热力发电》2016年第2期75-80,85,共7页Thermal Power Generation

基　　金：中央高校基本科研业务费专项资金资助项目(FRF-SD-12-013A)

摘　　要：研究通过离散单元法(DEM)模拟直观获得滚筒中的颗粒运动情况,分析滚筒中处于滚落状态下颗粒床的结构特点。结果表明:1)颗粒运动周期、主动层颗粒最大速率、主动层最大厚度、主动层最大厚度与料床最大深度之比的模拟值与理论模型的计算值相吻合;2)颗粒运动周期随转速的增加而减小,随填充率、滚筒直径的增加而增大;3)主动层颗粒最大速率随转速、填充率、滚筒直径的增加而增大;4)主动层最大厚度随转速、填充率、滚筒直径的增加而增大,δ/h随转速和滚筒直径的增加而减小,随填充率的增加而增大。The discrete element method（DEM）was applied to simulate the solids motion in the rotating drums and analyze the structure characteristics of the particle bed under the rolling mode in the rotating drums.The results show that,the simulation value on particle cycle time,the maximum velocity of particles in the active layer,the maximum thickness of the active layer,the ratio of the maximum thickness of the active layer to the maximum depth of bed are consistent with the calculated values of the theoretical model.The particle cycle time decreases with the increasing speed and increases with the filling rate and the diameter of the drum.The maximum velocity of particles in the active layer increases with the speed,the filling rate and the diameter of the drum.The maximum thickness of the active layer increases with the speed,the filling rate and the diameter of the drum,and theδ/hdecreases with the increasing speed and the drum diameter but increases with the filling rate.

关 键 词：滚筒冷渣器 颗粒运动 滚落状态 填充率 离散单元法 

分 类 号：TK284.6[动力工程及工程热物理—动力机械及工程]