摘要
To improve the dust removal performance of the wet electrostatic precipitator(WESP), a flow field optimization scheme was proposed via CFD simulation in different scales. The simplified models of perforated and collection plates were determined firstly. Then the model parameters for the resistance of perforated and collection plates, obtained by small-scale flow simulation, were validated by medium-scale experiments. Through the comparison of the resistance and velocity distribution between simulation results and experimental data, the simplified model is proved to present the resistance characteristics of perforated and collection plates accurately. Numerical results show that after optimization, both the flow rate and the pressure drop in the upper room of electric field regions are basically equivalent to those of the lower room, and the velocity distribution in flue inlet of WESP becomes more uniform. Through the application in practice, the effectiveness and reliability of the optimization scheme are proved, which can provide valuable reference for further optimization of WESP.
为了提高湿式静电除尘器的除尘性能,本文提出了一种基于多尺度数值模拟的流场优化方法。首先,确定多孔板和收尘板的简化模型;然后,得到相关的阻力参数,并通过中尺度实验进行验证。将模拟得到的阻力和速度分布与实验数据比较后发现简化模型能够准确地反映多孔板和收尘板的阻力特性。数值结果表明,经过优化后,电场上、下室的流量和压降基本相当,且烟道入口的速度分布更加均匀。将优化方案应用于工程实际后发现该方案确实有效可靠,可为湿式静电除尘器的性能优化提供有价值的参考。
作者
YE Xing-lian
WANG Shuai
ZHANG Hao
AN Xi-zhong
GUO Bao-yu
LI Li-feng
叶兴联;王帅;张浩;安希忠;郭宝玉;李立锋(Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education,School of Metallurgy,Northeastern University,Shenyang 110819,China;State Environmental Protection Engineering Center for Power Industrial Dust Control,Longyan 364000,China;Department of Chemical Engineering,Monash University,Clayton VIC 3800,Australia)
