Abstract: To harness the atmospheric pollution, the ultra-low emission requirements have been proposed in many domestic areas. In this paper, the study on pulse power supply, electrode configuration, gas distribution and rotatable brush dust cleaning technologies are conducted for reducing the outlet dust concentration of Electrostatic Precipitators (ESPs). The study concludes that the combination of pulse enhanced power combining with rotary electrode can improve the dust removal efficiency with superior advantage. Taking the dust removal retrofit project in a 330-MW unit of a power plan for example, the above applications are presented. The practice shows that the ESP dust emission mass concentration reaches as much as 16.4 mg/m³ after the modification, meeting the standard of 20 mg/m³ required by the “Emission standard of air pollutants for thermal power plants”. So far the ESP is still running in good condition, which lays good foundation for the ultra-low emission of the power plant.

Key words: thermal power plant, electrostatic precipitator, pulse enhancement, electrode configuration, rotary electrode, rotatable brush dust cleaning