低低温电除尘器运行优化策略研究及应用

Research and application of operation optimization strategy of low temperature electrostatic precipitator

为解决现有低低温电除尘技术煤种适应性弱、低温腐蚀风险高的问题,研究了一种利用燃煤机组低低温电除尘器低温腐蚀因子来判断除尘设备发生低温腐蚀概率的方法,结合对烟气酸露点和亚微米颗粒物控制的研究,提出了基于最佳运行烟温范围的低低温电除尘器运行优化控制策略,提升了低低温电除尘器对全粒径颗粒物的脱除效果。将该策略应用在浙能嘉兴电厂7号机组上,与机组完成超低排放改造后相比,低低温电除尘器对PM1、PM2.5、PM10等不同粒径颗粒物的脱除率均得到不同程度提高,电除尘器出口逃逸烟尘浓度降低50%以上。

In order to solve the problems of weak adaptability and high risk of low temperature corrosion of coal in existing low temperature electric dust removal technology,this paper studied a method to judge the probability of low temperature corrosion of dust removal equipment by using low temperature corrosion factor of low temperature electric dust collector of coal-fired units.Combined with the research on the control of acid dew point and sub-micron particles of flue gas,The optimal operation control strategy of low and low temperature ELECTROSTATIC precipitator based on the optimal operating smoke temperature range was invented,which improved the removal effect of low and low temperature electrostatic precipitator on full particle size.The strategy was applied to unit 7 of Zheneng Jiaxing Power Plant,and compared with the unit after ultra-low emission transformation,the removal rate of PM1,PM2.5,PM10 and other particles with different particle sizes was improved to varying degrees,and the concentration of dust escaping from the outlet of electrostatic precipitator was reduced by more than 50%.