基于离子风荷电的细水雾喷雾及抑尘特性  

Droplet and dust suppression characteristics of water mist based on ionic wind charging

作　　者：刘桂生 李科文 左子文[2] 蒋鹏 LIU Guisheng;LI Kewen;ZUO Ziwen;JIANG Peng(Jianbi Power Plant of China Energy,Zhenjiang,Jiangsu 212013,China;School of Energy and Power Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]国能江苏谏壁发电有限公司,江苏镇江212013 [2]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《排灌机械工程学报》2024年第10期1005-1010,1017,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51806087)。

摘　　要：基于离子风荷电及设计的缩放喷管搭建了荷电细水雾抑尘系统,利用激光粒度分析仪和荷质比测量装置,通过改变荷电及喷雾系统参数,研究了荷电电压和雾化压力等对喷雾雾滴粒径及抑尘特性的影响.结果表明:荷电细水雾索太尔平均直径d st整体随荷电电压和雾化压力提升而减小,但荷电电压较低时液滴易聚并,d st略微增大.液滴荷质比随荷电电压和雾化压力提升而增大,其增速随荷电电压提升而减缓.荷电细水雾抑尘系统抑尘效率整体随荷电电压和雾化压力提升而上升,但雾化压力较高时提高荷电电压,液滴粒径过小则会导致蒸发加剧,抑尘效率下降.分级抑尘效率随颗粒物粒径减小呈U形分布,其拐点随荷电电压提升而前移.荷电电压20 kV雾化压力0.6 MPa时存在最佳抑尘效率.A charged water mist dust suppression system was established based on ionic wind charging and a domestically designed convergent-divergent nozzle.A laser particle size analyzer and a charge-to-mass ratio measurement device were used to investigate the effects of charged voltage and atomization pressure on the droplet Sauter mean diameter and dust suppression characteristics by changing the charged and spraying system parameters.The results show that the overall Sauter mean diameter d st of the charged droplets decreases with the increase of charging voltage and atomization pressure,while slightly increases under the low charging voltage because of the aggregation of droplets.The charge-to-mass ratio of the droplets increases with the increase of charging voltage and atomization pressure,and the rate of increase slows down with the increase of charging voltage.The overall dust suppression efficiency of the charged water mist dust suppression system generally increases with the increase of charging voltage and atomization pressure.However,when the atomization pressure is too high,the increase of the charging voltage will cause the d st to be too small,resulting in decreasing dust suppression efficiency because of the increase of evaporation.The graded dust suppression efficiency shows a U-shaped distribution with the decrease of particle size,and the inflection point shifts forward with the increase of charging voltage.The optimal dust suppression efficiency is achieved at a charging voltage of 20 kV and an atomization pressure of 0.6 MPa.

关 键 词：荷电细水雾 索太尔平均直径 荷质比 抑尘 离子风 

分 类 号：S210.3[农业科学—农业机械化工程]