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 collec...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.展开更多
随着我国环保标准日益严格,很多燃煤电厂静电除尘器已不能满足排放标准的要求,需进行改造。该文首先分析了造成静电除尘器除尘效率低下的主要原因;提出3种改造方案:增加电场;改造为袋式除尘器;改造为静电袋式复合除尘器。并从技术性能...随着我国环保标准日益严格,很多燃煤电厂静电除尘器已不能满足排放标准的要求,需进行改造。该文首先分析了造成静电除尘器除尘效率低下的主要原因;提出3种改造方案:增加电场;改造为袋式除尘器;改造为静电袋式复合除尘器。并从技术性能和经济性2个方面对3种改造方案进行了比较,以郑州热电厂200 M W机组静电除尘器改造为例对3种方案进行了对比分析,结果表明:改造为静电袋式复合除尘器的方案是静电除尘器改造的最佳方案,并认为静电袋式复合除尘是我国除尘技术未来的发展方向之一。展开更多
文摘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.
文摘随着我国环保标准日益严格,很多燃煤电厂静电除尘器已不能满足排放标准的要求,需进行改造。该文首先分析了造成静电除尘器除尘效率低下的主要原因;提出3种改造方案:增加电场;改造为袋式除尘器;改造为静电袋式复合除尘器。并从技术性能和经济性2个方面对3种改造方案进行了比较,以郑州热电厂200 M W机组静电除尘器改造为例对3种方案进行了对比分析,结果表明:改造为静电袋式复合除尘器的方案是静电除尘器改造的最佳方案,并认为静电袋式复合除尘是我国除尘技术未来的发展方向之一。
