This paper presents a pioneer project of changing the bag-filter into colder-side electrostatic precipitator (ESP) for two 600 MW coal-fired boilers of Shanxi Luneng Hequ Power Plant for ultra-low emission of particle matters (PM) and sulfur dioxide (SO₂) by cooperative optimization of colder-side ESP with three-phase power source and wet flue gas desulfurization (WFGD). Due to the coal-fired boiler condition and initial bag filter size, we change bag filter into ESP by taking ESP sizing, gas flow distribution optimizing, three-phase power source, etc. into consideration. The main result of this paper is when the ESP's specific collection area is 83.5 m²/(m³·s) with threephase rectifier transformer and the inlet ash load concentration is around 35.8 g/m³, the outlet particle mass concentration is 9.93~14.69 mg/m³, of which the mass concentration of particles with diameters of less than 2.5 μm is below 1.58 mg/m³. The integration of colder-side ESP with three-phase power source and WFGD can achieve ultra-low emissions of air pollutants for coal-fired power plants.

coal-fired power plant  /  electrostatic precipitator  /  specific collection area  /  numerical simulation  /  process control