组合式滚筒冷渣机中颗粒径向扩散运动研究  

Study on radial diffusion motion of particles in combined drum slag cooler

作　　者：彭涛 何庆中 王佳 廖伯权 PENG Tao;HE Qingzhong;WANG Jia;LIAO Boquan(College of Mechanical Engineering,Sichuan University of Science&Engineering,Yibin 644007,China)

机构地区：[1]四川轻化工大学机械工程学院

出　　处：《热力发电》2019年第12期69-74,共6页Thermal Power Generation

基　　金：四川省科技厅科技成果转化项目(2017CC0046);四川轻化工大学研究生创新基金(y2018030)~~

摘　　要：在充分沿用传统滚筒式冷渣机灰渣适应性广、结构简单、运行可靠等优点的前提下,设计了一种组合串联式滚筒水冷式冷渣机。基于离散元法,建立灰渣运动模型,并利用EDEM软件直观地模拟颗粒在冷渣管中的运动情况。通过定义径向扩散系数的方式,得到不同料层颗粒径向扩散运动的规律:在填充率为25%时,同一料层径向扩散系数随着滚筒转速的增加而增加;在转速为5 r/min时,随着填充率的增加,活动区和静止区料层扩散系数减小,其余料层扩散系数增大。On the premise of folly taking the advantages of conventional roller type slag cooler,such as wide adaptability,simple structure and reliable operation,a combined series cylinder water-cooled slag cooler is designed.Based on discrete element method,a slag movement model is established,and the movement of particles in the cold slag tube is simulated visually by EDEM software.By defining the radial diffusivity,this paper explores the law of the radial diffusion of particles in different material layers.When the filling rate is 25%,the radial diffusivity of the same material layer increases with the rotational speed of the drum.When the rotating speed is 5 r/min,as the filling rate increases,the dififusivity of the active and static zone decreases,while that of the other material layers increases.

关 键 词：组合式 滚筒冷渣机 颗粒运动 径向扩散 离散元法 填充率 扩散系数 

分 类 号：TK284.6[动力工程及工程热物理—动力机械及工程]