The high emission of SO₃ or sulfuric acid aerosol became a new environmental issue and has attracted international concerns. The sulfuric acid aerosol could be removed through droplet charging and transportation in the electric field. However, the charged droplets also have a converse effect on the electrostatic field. In this study, a novel-designed current measurement system contained 171 probes was designed to automatically scan and record the current density distribution along the airflow direction. Results show that the average current density was reduced by 31.3% when SO₃ concentration was increased from 0 to 53.6 mg/m³, and the current density of the first electrode was only accounted for 11.3% of the original current. A higher corona onset voltage was required to ionize the flue gas because of a reverse electric field formed by the charged droplets. The current density was also decreased with the flue gas velocity under the SO₃ presence condition. When the flue gas velocity reached 4 m/s, the corona suppression was severe and the inflection point was no longer obvious. The region that the relative current density below 0.6 was comprised 70%. The current density could be enhanced by increasing the spike length and decreasing the spike spacing. The larger the corona current of the discharge electrode, the less the effect of the particle space-charge. Meanwhile, some suggestions for relieving corona suppression by enhancing the corona discharge at the inlet and promoting the droplet growth were proposed.

SO ₃或硫酸气溶胶的高排放成为一个新的环境问题，并引起了国际关注。可以通过电场中的液滴充电和运输来去除硫酸气溶胶。但是，带电液滴对静电场也有相反的影响。在这项研究中，设计新颖的包含171个探头的电流测量系统被设计为自动扫描和记录沿气流方向的电流密度分布。结果表明，当SO ₃浓度从0增加到53.6 mg / m ³时，平均电流密度降低了31.3％。，而第一电极的电流密度仅占原始电流的11.3％。由于带电的液滴形成了反向电场，因此需要较高的电晕起始电压使烟气电离。在SO ₃条件下，电流密度也随着烟气速度降低存在条件。当烟气速度达到4 m / s时，电晕抑制作用很严重，拐点不再明显。相对电流密度低于0.6的区域占70％。可以通过增加尖峰长度和减小尖峰间距来提高电流密度。放电电极的电晕电流越大，粒子空间电荷的影响越小。同时，提出了通过增强入口处的电晕放电和促进液滴生长来减轻电晕抑制的一些建议。