摘要
为探究煤矿工人个体防护多元方法,基于煤矿井下粉尘污染背景,采用气旋分离技术用于个体初级除尘,研究微气旋结构的粉尘捕集特性:建立并改进微型气旋结构,采用CFD-DPM方法、结合RNG k-ε对微型旋风分离结构中的多相流动过程进行模拟研究,着重分析粉尘颗粒的分离特性,探讨影响气旋结构中粉尘分离效率的主要因素。研究结果表明:气旋结构的圆锥体内流场湍流剧烈,发生涡旋核心偏移的摆尾现象;适当增加入口风速有利于提升粉尘颗粒在微气旋结构中的捕集率,大粒径粉尘的捕集率较高,排气管直径的增加会加快气旋装置内外部旋流的速度,可提高粉尘的捕集率。研究结果可为改进微型气旋结构、丰富个体防护方法提供参考。
To explore the diversified individual protection methods for coal mine workers,based on the background of dust pollution in coal mines,the cyclone separation technology was adopted for primary dust removal at the individual level.The dust capture characteristics in the microcyclone structure was investigated,and a microcyclone structure was established and improved.The CFD-DPM method and RNG k-εmodel were used to simulate the multi-phase flow process in the microcyclone separation structure.The characteristics of dust particle separation were analyzed,and the main influencing factors of dust separation efficiency in the cyclone structure were discussed.The results show that the turbulent flow in the cone of microcyclone structure is severe,and the tail swinging phenomenon of vortex core displacement occurs.The appropriate increase in inlet wind speed can improve the capture rate of dust particles in the microcyclone structure.The capture rate of bigger dust is better.The increase in the exhaust pipe diameter will accelerate the speed of internal and external swirling flow of the cyclone device,which can improve the capture rate of dust.The research findings can provide references for improving the microcyclone structure and enriching the individual protection methods.
作者
张虎
郭恒
何新建
常彬彬
耿凡
陈曦
ZHANG Hu;GUO Heng;HE Xinjian;CHANG Binbin;GENG Fan;CHEN Xi(Shendong Coal Group,CHN Group,Yulin Shaanxi 719000,China;School of Low-Carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;Research Institute of Occupation Health,China University of Mining and Technology,Xuzhou Jiangsu 221008,China;Beijing Innowind Aerospace Equipment Company Limited,Beijing 100039,China)
出处
《中国安全生产科学技术》
北大核心
2025年第3期113-118,共6页
Journal of Safety Science and Technology
基金
国家能源集团十大科技攻关项目(E210100285)。
关键词
微气旋结构
粉尘
分离特性
影响因素
CFD-DPM方法
microcyclone structure
dust
separation characteristic
influencing factor
CFD-DPM method
