Keywords: 
• ESP (electrostatic precipitator) /
• non-stead theory /
• collection efficiency /
• factors

Abstract: In order to further improve the collection efficiency of the electrostatic precipitator， especially for collecting the high-resistivity particle， the effect level and mechanism of factors influencing the dust collection performance were further studied based on the non-steady electrostatic collection theory. The experimental researched the interrelationship between the collection efficiency and the optimal plate distance， the optimum operating voltage， the thickness of dust layer and the particle resistivity systematically. The experimental results indicate that， with the increase of the plate distance， the increasing rate of different particles is different corresponding to the ratio collecting area， and the increasing tendency of the collection efficiency of high-resistivity particles increases significantly. The higher the particle resistivity the bigger the optimal plate distance， and it is superior to collect the high-resistivity particle for a wide spacing electrostatic precipitator. The higher the particle resistivity the bigger the corresponded optimum operating voltage under the optimal plate distances. With the increase of dust layer’s thickness， the optimum operating voltage corresponding to the best collection efficiency of high-resistivity particles increases by a big margin and the collection efficiency corresponding to the optimum operating voltage decreases significantly when relatives to the normal resistivity dust. The collection efficiency of electrostatic precipitator lowers gradually with the increase of the particle resistivity， and the collection efficiency lowers significantly when the particle resistivity is greater than 1011 Ω·cm especially. The experimental results match the view proposed by the non-steady electrostatic collection theory and contribute to understanding the relationship between the dust collection performance and electrostatic precipitator’s structure and operating parameters thoroughly. The results have guides to research specific technical measures for improving collection performance of high-resistivity particle specially.