基于CFD的可燃性粉尘管道非接触式除尘机理研究  

Research on non-contact dust removal mechanism of combustible dust pipieline based on CFD

作　　者：余鹏洲 卿兆波 YU Pengzhou;QING Zhaobo(College of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou Zhejiang 310018,China)

机构地区：[1]中国计量大学机电工程学院,浙江杭州310018

出　　处：《中国安全生产科学技术》2024年第10期153-159,共7页Journal of Safety Science and Technology

基　　金：浙江省基础公益研究计划项目(LGG21E080008);浙江省重点研发计划项目(2019C03097)。

摘　　要：为提高非接触式清扫管道机器人在可燃性粉尘管道中的清扫效果,采用流场颗粒力系、力矩平衡理论对干燥和潮湿环境下颗粒滚动和切向移动的分离条件和临界风速进行分析;利用CFD技术对有无管道机器人条件下的粉尘管道壁面风速的变化情况进行仿真分析;结合分离条件和风速仿真结果进行干燥和潮湿环境下壁面粉尘清扫效率的研究。研究结果表明:颗粒分离的临界风速与颗粒直径呈负相关,与液桥颗粒体积比呈正相关;管道机器人的除尘管道壁面风速可增至无管道机器人的2.69~27.84倍,管道机器人可有效提高0.5~4.0 mm直径颗粒的清扫效率。研究结果可为可燃性粉尘管道非接触式安全清扫研究提供理论支持。In order to improve the cleaning effect of the non-contact sweeping pipeline robot in the combustible dust pipelines,the separation conditions and critical wind speeds of particle rolling and tangential motion in dry and wet environments were analyzed by using the flow field particle force system and moment balance theory.The simulation analysis on the change in the wall flow rate of dust pipeline with and without the pipeline robot were conducted by using CFD technology.Combining the separation conditions and the flow speed simulation results,the dust sweeping efficiency of the wall surface in dry and wet environments.The results show that the critical wind speed for particle separation is negatively correlated with the particle diameter,and positively correlated with the volume ratio of liquid-bridged particles.The wall wind speed of the dust removal pipeline with the pipeline robot can be increased to 2.69~27.84 times that without pipeline robot,and the pipeline robot can effectively increase the sweeping efficiency of particles with diameters ranging from 0.5 to 4.0 mm.The research results can provide theoretical support for the study of non-contact safe sweeping of combustible dust pipelines.

关 键 词：除尘机理 可燃性粉尘 非接触式清扫 颗粒分离速度 CFD 

分 类 号：X932[环境科学与工程—安全科学]