The factors affecting operation of electrostatic precipitator(EP)have been analysed

finding out the main causes resulting in efficiency-reducing of EPs for boilers no.1 and no.2 in Huaneng Shantou Power Plant

such as inversed corona

thick corona wires and dust deposition on anode plates

blocked corona

unsuitable temperature and pressure of exhaust flue gas from boilers

short-circuit in the high-voltage side

and deviation of control function of high-voltage control cabinet

and deviation of the sampling resister etc..After implementation of corresponding measures of retrofit

the dust removal efficiency of EPs has been substantially enhanced.