Research Trends on Enhancing the Collection Efficiency of Electrostatic Precipitators

초록

Electrostatic precipitators (ESPs) are extensively utilized for removing particulate matter exhausted from industrial facilities due to their high collection efficiency at high gas velocities. However, ESPs exhibit lower collection efficiency for particles sized between 0.1 to 1 mu m due to low charging efficiency by diffusion and field charging.To enhance ESP performance, strategies such as increasing the collection area, improving charging efficiency, and preventing particle re-entrainment are essential. Various designs of collection plates have been proposed to maximize the collection area, while advancements in particle chargers with high ion generation have improved charging efficiency. Methods to maintain high electric field strength have also been employed to boost the migration velocity of particles towards collection plates. Additionally, wet electrostatic precipitators (WESPs) reduce re-entrainment by forming a water film on the collection plates, and the introduction of electrospraying technology further enhances charging efficiency and minimizes re-entrainment. This study reviews research trends focusing on these innovations, aiming to address ESP limitations and improve particulate matter removal efficiency in industrial applications.

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