风流影响雾滴与尘粒耦合沉降的实验研究  

Experimental Research on the Coupling and Settlement of Droplets and Dust Particles Influenced by Airflow

作　　者：聂文[1,2] 彭慧天 刘阳昊 马骁[2] 魏文乐 

机构地区：[1]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [2]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2016年第6期30-36,共7页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金-煤炭联合基金重点项目(U1261205);国家自然科学基金项目(51474139);国家自然科学基金青年基金项目(51404147);中国博士后科学基金第57批面上一等资助项目(2015M570602)

摘　　要：为了确定风流影响雾滴与尘粒耦合沉降的规律,分析了雾滴与尘粒耦合沉降机理,并自主设计实验装置进行了风流影响雾滴与尘粒耦合沉降实验。由实验结果可知:随着风流速度的增大,喷雾场雾滴粒径平均值整体呈增大趋势,喷雾场上风侧的雾滴粒径一般小于下风侧,测点处雾滴的粒径增大值及增大率均不断减小,喷雾场对全尘、呼尘的降尘率分别由风速为0.5m/s时的49.3%和47.5%降至风速为1.5m/s时的42.7%和39.2%。研究结果表明:风流速度越大,越不利于雾滴耦合沉降尘粒、尤其小粒径尘粒。In order to determine the law of the coupling and settlement of droplets and dust particles influenced by airflow, the coupling and settlement mechanism of droplets and dust particles was analyzed, and the experiment of the coupling and settlement of droplets and dust particles influenced by airflow was carried out by the self-designed devices.The experiment results show that, with the increase of airflow velocity, the average value of droplets＆#39; particle sizes in the spray field tends to increase while the increase values and increase rates of droplets＆#39; particle sizes at measuring points decrease constantly, and the particle sizes of droplets on the upwind side of the spray field are smaller than those on the downwind side.In the spray field, the dust removal rates of total dust and respirable dust decrease respectively from 49.3% and 47.5% when the airflow velocity is 0.5 m/s to 42.7% and 39.2% when the airflow velocity is 1.5 m/s.The research results show that the larger the airflow velocity is, the worse it is for the droplets to settle dust particles, especially dust with small particle sizes.

关 键 词：风流 雾滴 尘粒 耦合沉降 粒径 

分 类 号：TD714[矿业工程—矿井通风与安全]