针对矿尘中PM10捕尘雾滴粒径的实验研究  

Experimental Study on Droplet Diameter for PM10 of Mine Dust

作　　者：张江石[1,2] 杨雪松 ZHANG Jiangshi;YANG Xuesong(School of Resource and Safety Engine ering, China University of Mining and Technology (Beijing), Beijing 100083, China;Key Laboratory of Mine Disaster Prevention and Control, North China Institute of Science and Technology, Sanhe 065201, China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]华北科技学院河北省矿井灾害防治重点实验室,河北三河065201

出　　处：《煤矿安全》2019年第5期47-50,共4页Safety in Coal Mines

摘　　要：为得到矿井中捕集PM10的雾滴粒径与PM10的关系,确定捕集PM10的最佳雾滴粒径的范围,通过自主搭建的尘-雾粒径耦合实验系统,使用激光粒度分析仪测量捕捉PM10前后的雾滴粒径。采用直径为1.0 mm的空心圆锥形喷嘴,压力分别为3、4、5 MPa,实验风速为1.5 m/s。结果表明:当PM10被雾滴捕集时,该雾滴粒径是粉尘粒径的6～13倍的概率为93%,8～10倍的概率为61.6%;3 MPa压力下,雾滴捕捉粉尘粒径的范围较大,压力为4、5 MPa时,捕集的粉尘大多小于7μm,喷嘴直径不变时,压力越大越有利于捕集PM10。根据实验结果拟合出3种压力下雾滴粒径与被捕粉尘粒径的函数关系式。To obtain relation of droplet size for trapping PM10 and PM10 and confirm range of the best droplet size to capture dust of PM10, by particle size coupling experiment system of dust field and droplet field constructed independently, using hollow conical nozzle with 1.0 mm diameter, controlling airflow speed at 1.5 m/s to simulate the on-site airflow speed, the pressure is 3 MPa, 4 MPa and 5 MPa, and using laser particle size analyzer to measure droplet size before and after the capture of PM10.When PM10 is captured by droplets, the probability of the droplet size being 6 to 13 times of the dust size is 93%, and the probability of 8 to 10 times is 61.6%. When pressure is 3 MPa, the range of dust particle size captured by fog drops is large.When the pressure is 4 MPa and 5 MPa, most trappe ddust is mostly less than 7 μm. When the nozzle diameter remains unchanged, the greater the pressure is, the more favorable it is to capture PM10. According to the experimental results, the functional relationship between droplet size and particle size of captured dust under three kinds of pressure was fitted.

关 键 词：PM10 尘雾场 雾滴粒径 喷雾压力 拟合函数 粉尘防治 

分 类 号：TD713[矿业工程—矿井通风与安全]