Under the new situation that most domestic coal-fired power plants have completed the ultra-low emission transformation

some new problems highlight

such as higher running energy consumption of environmental protection equipment

less flexible of operation adjustment method and so on. Therefore

energy saving of coal-fired unit will be a research hotspot in the future. Based on the energy consumption analysis of electrostatic precipitator

this study puts forward a series of energy saving and optimization measures. The experiment of energy saving and optimization on electrostatic precipitator system is carried out on the 680 MW unit of a coal-fired power plant. The results show that the electricity consumption rate of the entire ESP system after energy saving and optimization drops from 0.378% to 0.256% and power saving rate reaches 32.32%

while the dust emission concentration increases from 1.62 mg/m3 to 3.17 mg/m3. This illustrates that this unit realizes ultralow emission and reduces the running energy consumption. The experimental results provide some reference for other units of the energy saving and optimization.