常规电除尘器存在PM2.5荷电困难的技术瓶颈,电湍耦合凝并技术可经济高效实现PM2.5凝并,帮助电除尘器对PM2.5高效脱除,在众多颗粒凝并技术中工程应用价值最高.对烟道PM2.5捕集增效装置进行结构优化,确定双极荷电区、湍流聚合区关键部件结构及主要参数,总烟尘可减排20.3％,PM2.5减排30.1％;研发出封头PM2.5捕集增效装置,确定双极异性荷电颗粒最佳掺混方案,总尘可减排17.3％;与旋转电极+低低温电除尘器耦合后,PM2.5可减排37％;多种布置及组合方式,可灵活适应工程实际条件的不同需求,满足燃煤电厂PM2.5治理的环保急需.%Regarding the technical bottleneck as difficulty in PM2.5 particle charging in conventional electrostatic precipitator (ESP), the particle coalescence technique based on turbulence coupled with bipolar-charged mechanism can promote the PM2.5 coalescence economically and efficiently, which is of great help for ESP to remove PM2.5 effectively. Apparently it has the highest engineering application value among a variety of particle coalescence technologies. In this paper, the structural optimization of gas duct PM2.5 trapping and removal device are carried out, then the key components structure and the main parameters of bipolar charged area and turbulent aggregation area are determined. The total flue dust can be reduced by 20.3％, and PM2.5 emissions can be reduced by 30.1％. In addition, the PM2.5 trap synergistic device are developed and the best mixing scheme for bipolar charged particles are determined. The total dust can be reduced by 17.3％. After coupling with low-low temperature electrostatic precipitators with rotating electrodes, PM2.5 can be reduced by 37％. The multi-clock arrangement and combination mode can flexibly adapt to the different requirements of the actual engineering conditions, and meet the urgent requirements of environmental protections for PM2.5 management of coal-fired power plants.
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