In this study, a wet electrostatic precipitator (WESP) with combination of electric field and charged water drop atomization was designed for fine particle collection, which replaced the traditional water film and mechanically spray. The removal performance was evaluated considering applied voltage, water flow rate, gas residence time, dust concentration, and continuous operation time. Results indicated that supplying charged droplets could acquire higher discharge current and better agglomeration effect than the dry type. The maximum penetration ratio was reduced from 3.8%−11.56% in the dry ESP to 3.58%−8.6% with charged droplets, as the applied voltage increased from 30 kV to 60 kV. Meanwhile, increase of water flow rate improved the total removal efficiency. The advantage of the WESP was more obvious under short gas residence time. The route of synergistically increasing gas residence time and applied voltage could largely reduce the penetration ratio, which decreased from 6.99%−19.81% to 1.03%−2.43% as they were enhanced from 1.50 s and 30 kV to 3.33 s and 60 kV. Increasing the dust concentration led to the trend that the total removal efficiency first increasing and then decreasing gradually, resulted from combined mechanisms of particle agglomeration and suppression of corona current. Moreover, the atomization of charged water drop maintained the advantage on particle removal under continuous operation, and the efficiency drop after long-term operation could be avoided. In particular, the WESP achieved significant reduction on water consumption compared to conventional large-scale and on-site WESPs in application with equivalent levels of removal efficiency.

在这项研究中，设计了一种结合电场和带电水滴雾化的湿式静电除尘器（WESP）用于细颗粒收集，它取代了传统的水膜和机械喷雾。考虑施加电压、水流量、气体停留时间、粉尘浓度和连续操作时间来评估去除性能。结果表明，与干式相比，提供带电液滴可以获得更高的放电电流和更好的团聚效果。随着外加电压从 30 kV 增加到 60 kV，最大渗透率从干式 ESP 的 3.8%-11.56% 降低到带电液滴的 3.58%-8.6%。同时，水流量的增加提高了总去除效率。WESP在气体停留时间短的情况下优势更加明显。协同增加气体停留时间和施加电压的途径可以大大降低渗透率，渗透率从 6.99%-19.81% 下降到 1.03%-2.43%，因为它们从 1.50 s 和 30 kV 提高到 3.33 s 和 60 kV。由于颗粒团聚和抑制电晕电流的共同作用，随着粉尘浓度的增加，总去除效率呈现先升高后逐渐降低的趋势。此外，带电水滴的雾化在连续运行下保持了颗粒去除的优势，避免了长期运行后效率下降。特别是，与应用中的传统大规模和现场 WESP 相比，WESP 显着减少了用水量，具有相同的去除效率水平。