雾化电晕放电静电除尘的实验研究

采用模拟除尘装置,对雾化电晕放电和干式电晕放电的电晕起始状态、伏-安特性和除尘效率进行了比较,对雾化电晕放电中新的放电特性和除尘机制进行了分析.实验表明,在相同电压和较高烟气流量条件下,除尘效率从干式负电晕放电的78.2%提高到雾化负电晕放电的84.2%.其中雾化负电晕放电更适合应用于烟气中颗粒污染物的去除,而雾化正电晕放电中扩大的低温等离子区对雾化循环水的净化起到重要作用.

Experimental Study on Electrostatic Precipitation with Spraying Corona Discharges

In this paper a simulative precipitation device was employed. The corona onset situation, the V-I characteristics and the precipitation efficiency of spraying corona discharges and dry corona discharges were researched and compared with each other, and the new discharge characteristics and precipitation principle of spraying corona discharges were analyzed. The experiments show that the precipitation efficiency is raised from 78.2% of dry negative corona discharges to 84.2% of spraying negative corona discharge under the conditions of the same high voltage and the same gas flow rate. The spraying negative corona discharges is more suitable for removal of particle contamination than the spraying positive corona discharges. The spreading corona plasma of the spraying positive corona discharges plays a important role for purifying the spraying circulating water.