振打清灰对电除尘器排放的影响:工业应用分析

发布时间：2018-01-25 05:24

本文关键词： 电除尘器顶部电磁振打侧部机械振打振打加速度电场参数 PM PM.　出处：《高电压技术》2017年02期 　论文类型：期刊论文

【摘要】：振打清灰过程是电除尘器(ESP)持续高效运行的一项重要保障,电极表面清灰效果直接影响电除尘器运行电气参数,进而影响电除尘器的粉尘排放质量浓度。为此,以有功功率为600 MW的燃煤机组双室5电场工业电除尘器为例,对比分析了顶部电磁振打和侧部机械振打对电除尘器运行参数以及排放质量浓度的影响。结果表明:在相同振打参数条件下,侧部机械振打产生的加速度平均值约为顶部电磁振打的3倍,而且振打加速度分布相对均匀;通过将顶部电磁振打改造为侧部机械振打,电除尘器每个通道的电源输入容量由131 kVA提高至190kVA;PM10排放质量浓度由19.33 mg/m3降低至14.14 mg/m3,降低比例为26.85%;PM2.5排放质量浓度由4.23mg/m3降低至1.20 mg/m3,降低比例为71.53%。电除尘器处理高黏性、高比电阻的粉尘时采用侧部机械振打有利于提高电除尘器运行参数并降低电除尘器出口粉尘排放质量浓度。
[Abstract]:Vibration cleaning process is an important guarantee for ESPs to run continuously and efficiently. The cleaning effect of electrode surface directly affects the electrical parameters of ESP. Thus, the dust emission mass concentration of the electrostatic precipitator is affected. For this reason, the duplex chamber 5 electric field industrial electrostatic precipitator with 600 MW active power is taken as an example. The effects of the top electromagnetic vibration and the lateral mechanical vibration on the operation parameters and emission mass concentration of the electrostatic precipitator are compared and analyzed. The results show that: under the same vibration parameters. The average acceleration produced by the lateral mechanical vibration is about three times that of the top electromagnetic vibration, and the acceleration distribution is relatively uniform. By transforming the top electromagnetic vibration into the side mechanical vibration, the power input capacity of each channel of the electrostatic precipitator is increased from 131 kVA to 190kVA. The emission concentration of PM10 was reduced from 19.33 mg/m3 to 14.14 mg / m ~ (3), and the ratio of reduction was 26.85%. The emission mass concentration of PM2.5 was reduced from 4.23 mg / m ~ 3 to 1.20 mg / m ~ (3), and the ratio was 71.53. The electrostatic precipitator was used to treat high viscosity. The use of lateral mechanical vibration in the dust with high specific resistance can improve the operating parameters of the electrostatic precipitator and reduce the dust emission concentration at the outlet of the electrostatic precipitator.
【作者单位】：浙江大学化学工程与生物工程学院工业生态与环境研究所;
【基金】：国家高技术研究发展计划(863计划)(2013AA 0651001-1)~~
【分类号】：X773
【正文快照】： 0引言1工业电除尘器(ESP)种类和结构形式繁多,但是都基于相同的工作原理,主要包括电晕放电、粉尘荷电、荷电粉尘在电场中的迁移运动以及被捕集粉尘的清除[1-3]。工业电除尘器通常采用负高压直——流电晕,即在放电阴极线与接地阳极板之间施加一负直流高压,放电阴极线周围形成大

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