高压负电晕放电雾化实验分析

Experimental Analysis on Electrostatic Atomization of Negative High-voltage Corona Discharge

为了提高微细粉尘的凝并效率,寻求雾化电晕放电的最佳雾化状态,对雾化电晕放电进行了实验研究。通过空腔式雾化电极在负高压电晕放电下的状态分析,研究影响雾化过程的各种因素,并对干式电极放电和空腔式雾化电极放电特性的差别进行探究。结果表明:在该实验条件下,液体的喷射在40kV电压前后因其雾化机理不同而表现出稳定射流和离散液滴喷射的不同雾化形式,且不受溶液体积配比及雾化电极直径的影响;在相同的电压下,雾化电极的电晕电流高于干式电极的放电电流。证明了雾化电晕放电应用于静电除尘领域的可行性,同时为进一步研究雾化电晕放电提供了参考。

In order to improve the efficiency of fine dust coagulation,and to seek for the best atomized status of corona discharge,electrostatic atomization of negative high-voltage corona discharge was experimentally studied.The state of the cavity-type spray electrode in the negative high-voltage corona discharge was analyzed.To study the various factors which affect the atomization process,the differences in the characteristics of corona discharge between dry electrode discharge and cavity-type atomizing electrodes were explored.The results show that：under the experimental conditions,the liquid jet behaves in different forms of a stable jet and the discrete droplets before and after 40KV,which is not affected by the solution concentration and the diameter of atomizing electrodes,because the atomization mechanisms of corona discharge are different.At the same voltage,the corona discharge current of atomizing electrode is higher than the discharge current of dry-type electrode.The results verify the feasibility that atomizing corona discharge is applied to the field of electrostatic dust removal.