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山东大学学报 (工学版) ›› 2020, Vol. 50 ›› Issue (5): 83-89.doi: 10.6040/j.issn.1672-3961.0.2019.748

• • 上一篇    

烟气成分对湿式电除尘器电晕放电特性的影响

王磊1,张玉磊1,李兆东1,张金峰1,王翔2*   

  1. 1. 国网山东省电力公司寿光市供电公司, 山东 寿光 262700;2. 山东大学燃煤污染物减排国家工程实验室, 山东 济南 250061
  • 发布日期:2020-10-19
  • 作者简介:王磊(1982— ),男,山东淄博人,工学硕士,主要研究方向为电力系统运行与控制.E-mail:Leiwang@163.com. *通信作者简介:王翔(1989— ),男,山东淄博人,助理研究员,主要研究方向为低温等离子.E-mail:rickwangx@139.com

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

摘要: 建立单通道线板式湿式电除尘器机理实验台,考察烟气中主要成分(O2、H2O和粉尘)对湿式静电除尘器放电特性的影响。随着烟气成分(O2、H2O和粉尘)浓度的增加,空间静电场中负电荷密度增加,电场分布均匀性提高,抑制电晕放电,电晕电流降低;随着电压升高,烟气成分对电晕放电的抑制作用减弱。其中,烟气中O2的体积分数增加引起电晕电流下降的速率不为常数,O2体积分数小于6%时,下降速率明显减小。烟气中液相水滴附着在电晕线表面引起表面电场畸化,起晕电压降低,击穿电压提高,湿式静电除尘器的工作电压窗口增大。电晕电流与烟气中粉尘浓度呈线性相关关系,粉尘粒径越小对电晕放电的抑制作用越明显。

关键词: 湿式静电除尘器, 烟气成分, 起晕电压, 击穿电压, 静电场均匀性

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

中图分类号: 

  • TM89
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