中文摘要：

为了进一步提高电除尘器的收尘效率,尤其是对高比电阻粉尘的收尘效率,依据非稳态静电收集理论,对影响电除尘器粉尘收集性能各项因素的作用程度及机理进行了进一步研究。实验研究了粉尘收尘效率与不同比电阻粉尘的最优极间距、最优工作电压、粉尘层厚度和比电阻之间的相互关系。研究结果表明,随着极间距的增加,对应比收尘极面积,对于不同比电阻粉尘的收尘效率的增加幅度是不同的,其中高比电阻粉尘的收尘效率增加的趋势更加显著;粉尘比电阻越高,所对应的最优极间距越大,宽间距电除尘器对捕集高比电阻粉尘具有一定优越性;在最优极间距条件下,粉尘比电阻越高,其所对应的最优工作电压越小;相对于正常比电阻粉尘,随极板沉积粉尘层厚度的增加,高比电阻粉尘的最佳收尘效率所对应的最优工作电压升高幅度较大,而且最优工作电压所对应的收尘效率下降显著。随粉尘比电阻的增大,电除尘器收尘效率逐渐降低,特别是当粉尘比电阻大于1011Ω.cm后,粉尘收尘效率显著下降。研究结果与非稳态静电收尘理论提出的观点相吻合,有助于透彻理解电场结构和运行参数与粉尘收集性能的关系,特别是对于今后研发提高高比电阻粉尘收集性能的针对性技术措施具有指导作用。

英文摘要：

In order to further improve the collection efficiency of the electrostatic precipitator,especially for collecting the high-resistivity particle,the effect level and mechanism of factors influencing the dust collection performance were further studied based on the non-steady electrostatic collection theory.The experimental researched the interrelationship between the collection efficiency and the optimal plate distance,the optimum operating voltage,the thickness of dust layer and the particle resistivity systematically.The experimental results indicate that,with the increase of the plate distance,the increasing rate of different particles is different corresponding to the ratio collecting area,and the increasing tendency of the collection efficiency of high-resistivity particles increases significantly.The higher the particle resistivity the bigger the optimal plate distance,and it is superior to collect the high-resistivity particle for a wide spacing electrostatic precipitator.The higher the particle resistivity the bigger the corresponded optimum operating voltage under the optimal plate distances.With the increase of dust layer’s thickness,the optimum operating voltage corresponding to the best collection efficiency of high-resistivity particles increases by a big margin and the collection efficiency corresponding to the optimum operating voltage decreases significantly when relatives to the normal resistivity dust.The collection efficiency of electrostatic precipitator lowers gradually with the increase of the particle resistivity,and the collection efficiency lowers significantly when the particle resistivity is greater than 1011Ω·cm especially.The experimental results match the view proposed by the non-steady electrostatic collection theory and contribute to understanding the relationship between the dust collection performance and electrostatic precipitator’s structure and operating parameters thoroughly.The results have guides to research specific technical measures for improving collection performa