Journal of Shandong University(Engineering Science) ›› 2020, Vol. 50 ›› Issue (5): 83-89.doi: 10.6040/j.issn.1672-3961.0.2019.748

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Effect of gas components on the discharge characteristics of the wet electrostatic precipitator

WANG Lei1, ZHANG Yulei1, LI Zhaodong1, ZHANG Jinfeng1, WANG Xiang2*   

  1. 1. Shouguang Power Supply Company, State Grid Shangdong Electric Power Company, Shouguang 262700, Shandong, China;
    2. National Engineering Laboratory for Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, Shandong, China
  • Published:2020-10-19

Abstract: To study the effects of gas components on the corona discharge characteristics of the wet electrostatic precipitator, a test bench was built. The effect of O2, H2O, and dust concentration on the discharge current were discussed in detail, results show than the O2, H2O and, dust in the flue gas had an inhibitory effect on the corona discharge and the negative ion concentration and electrostatic-field uniform were greatly improved with the increase of the O2, H2O, and dust concentration in the flue gas. The inhibitory effect of these components on the discharge current became weaker on a higher applied voltage. The descending rate of the discharge current was not a constant with the increase of O2 concentration in the flue gas when the O2 concentration was higher than 6%, the discharge current descended rapidly. The distribution of the electricfieldon the surface of the discharge electrode was twisted because of the aggregation of the liquid droplets. Wet electrostatic precipitator had a wide range of operating voltages and the onset voltage was lower and the breakdown voltage was higher under high water content in the flue gas. Dust concentration showed a linear correlation of the discharge current and the inhibitory effect increased when the dimensions of dust were smaller.

Key words: wet electrostatic precipitator, gas components, onset voltage, breakdown voltage, electrostatic-field uniformity

CLC Number: 

  • TM89
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