Enhanced Particle Removal by Electrosprayed Charged Droplets in a Scrubber

JOON YUB KIM, Myong-Hwa Lee, Kangwon National University

     Abstract Number: 242
     Working Group: Control and Mitigation Technology

Abstract
Wet scrubbing system is widely used to remove particulate matter and gaseous species. However, its particle removal efficiency is not high enough to satisfy the reinforced national regulation. Therefore, a potential method to increase the collection efficiency is required. The installation of an electrospray system can be a good alternative to improve the performance of a wet scrubber. Charged droplets generated by electrospraying can capture the fine particles more effectively by electrostatic attraction. However, the resultant droplet size is more important to be removed in a wet scrubber. Once the droplet size is too small, it can be discharged with fluid stream. In addition, high liquid to gas ratio is required to increase the particle collection efficiency in a wet scrubber. Most of recent studies about electrodynamic atomization have focused on the low liquid flow rates.

In this study, electrospray using a tap water was conducted at the liquid flow rates of 100~500 milliliters per minute, and the characteristics and size distribution of the resultant charged droplets were measured and compared based on the electric field orientation, liquid flow rates, and electrical conductivity. Additionally, particle removal efficiency was measured to investigate the effect of the charged droplets generated by electrospray.

Acknowledgment
This study was supported by the Korea Environmental Industry & Technology Institute grant funded by the Korean government (Ministry of Environment) (No. RS-2023-00219242).

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