选煤厂输送带转载段煤尘时空分布特性研究  

Study on spatiotemporal distribution of coal dust in conveyor belt transfer section of a coal preparation plant

作　　者：李文利 耿凡[2,3] 温恬靓 李世航[2] 李小川[2] 刘健滨 LI Wenli;GENG Fan;WEN Tianliang;LI Shihang;LI Xiaochuan;LIU Jianbin(CHN Energy Shenhua Shendong Coal Group Corporation Limited,Shenmu 719315,China;Research Institute of Occupation Health,China University of Mining and Technology,Xuzhou 221116,China;School of Low-Carbon and Power Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]国能神东煤炭集团有限责任公司,陕西神木719315 [2]中国矿业大学职业健康研究院,江苏徐州221116 [3]中国矿业大学低碳能源与动力工程学院,江苏徐州221116

出　　处：《煤矿安全》2025年第2期87-92,共6页Safety in Coal Mines

基　　金：国家能源集团十大科技攻关资助项目(E21010028504)。

摘　　要：为了优化选煤厂输送带转载段设计、减少粉尘污染,基于某输送带转载段原型建立了其三维物理模型,采用CFD-DPM方法研究了煤粉在转载时的扩散过程,揭示了粉尘颗粒在输送带转载段的时空分布特征及其主要影响因素。研究结果表明:小粒径的粉尘跟随性好、易受气流变化影响,扩散严重;转载段内平均流速较高区域的粉尘在转载段内停留时间较短,粉尘平均质量浓度较小;转载段内平均粉尘质量浓度随产尘量的增加而增加,粉尘初速度的影响则反之,转载段底部粉尘质量浓度较高,此处的密封尤为重要,以防细小粉尘向外扩散。In order to optimize the design of the conveyor belt transfer section and reduce dust pollution,a three-dimensional physical model of the conveyor belt transfer section is established based on its prototype.The diffusion process of pulverized coal in the conveyor belt transfer process of the transfer section is studied by using CFD-DPM method,and the temporal and spatial distribution characteristics of dust particles in the transfer section and their main influencing factors are revealed.The results show that the dust with small particle size has good followability,is easy to be affected by air flow changes,and serious diffusion;the dust in the area with higher average velocity stays in the section for a shorter time,and the average dust mass concentration is lower;the average dust mass concentration in the transfer section increases with the increase of dust generation rate,and the influence of initial dust velocity is on the contrary;the dust mass concentration at the bottom of the transfer section is high,and the sealing here is particularly important to prevent the diffusion of fine dust to the outside.

关 键 词：输送带转载段 选煤厂 粉尘控制 粉尘扩散 粉尘时空分布 

分 类 号：TD714[矿业工程—矿井通风与安全]