Research on Tracking the Critical Spark Point and Three-Phase Rectifier Technology for Electrostatic Precipitator

Based on the air conductivity theory and the electrostatic precipitation theory, this paper proposes the scheme for ESPs power supply by using the tracking critical spark regulation (no spark) and the three-phase silicon-controlled rectifier (SCR) AC phase-control voltage regulation. It has been verified through industrial test. Compared with the scheme of the single-phase SCR AC phase-control voltage regulation it makes ESPs dust emissions to decrease by 60% approximately and the inherent energy-saving be up to 30% (apparent power), compared with the scheme of the three-phase SCR AC phase-control voltage regulation without using the tracking critical spark point regulation the decrease of ESPs dust emissions is up to 20%.