蛇管输送煤球抑制颗粒破碎的离散元模拟研究  

Discrete element simulation of reduce coal particle impact crushing under serpentine pipe

作　　者：屈天兴 陈强[2] 宋华[2] 刘正海 

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870 [2]辽宁科技大学机械工程与自动化学院,辽宁鞍山114051

出　　处：《辽宁科技大学学报》2017年第4期281-286,共6页Journal of University of Science and Technology Liaoning

基　　金：辽宁省高校创新团队支持计划(TL2015014)

摘　　要：针对实际输送煤球工程降低颗粒破碎的要求,以理论力学及冲击力学理论为基础,采用三维离散元软件EDEM,对重力作用下的竖直管及蛇管输送煤球进行了离散元对比模拟研究。结果表明:蛇管在输送颗粒过程中,由于管道弯曲,颗粒在管道中形成力链,增加了颗粒之间、颗粒与管壁的接触与碰撞几率,部分动能及势能转换为摩擦功和变形能,导致颗粒动量及冲击力降低,较于竖直管道,蛇形管道出口冲击力降低了74%,减小了颗粒的破碎几率。According to reducing the particle impact crushing requirements under the transportation of coal particles,based on the theory mechanics and impact mechanics,the method of three-dimensional discrete element is used to simulate the flow behavior of material particles in vertical pipes and serpentine pipe under gravity. The results indicate that the particles form a chain of force in the pipeline due to the bending of the pipe under the transportation of coal particles. The increase of the contact and collision probability of the particles resulted in the transformation of the kinetic energy and the potential energy into the friction work and deformation energy. Therefore,the probability of particles broken is deduced. Compared to vertical pipes,the impact force of coal particle is decreased by 74% in the serpentine pipe. It shows that the serpentine pipe can effectively inhibit the crushing and pulverization of coal particle,which is more beneficial for maintaining the integrity of coal particles.

关 键 词：蛇管 煤球 颗粒破碎 离散元法 

分 类 号：TQ022.3[化学工程]