收尘区脉冲供电对电除尘器收集性能的影响
Influence of pulse supply in collecting area on collection performance of electrostatic precipitator
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摘要: 建立了双区电除尘器实验模型，研究了预荷电压、不同供电方式下极板间距、电极型式对双区电除尘器收尘效果的影响。结果表明：随着预荷电压逐渐升高，除尘效率也随之增加，双区除尘效果明显优于单区的除尘效果。脉冲供电对电除尘器的除尘性能影响明显，与直流供电相比，脉冲供电对PM2.5的分级效率可提高16.9%；在较高的电压时，极板间距为400 mm的除尘效率明显高于间距为300 mm的除尘效率，同时其驱进速度也有很大的提高；芒刺电极收尘效果显著优于光滑电极；对小于20 μm的颗粒，脉冲放电提高其驱进速度平均为54.22%。Abstract: The two-stages electrostatic precipitator (ESP) model was set up. The dust collection efficiency of two-stages electrostatic precipitator (ESP) was investigated under different parameters, including pre-charge voltage, power supply mode, electrode-plate space distance, and electrode type. The result showed that the dust collection efficiency of two-stages ESP increased with increasing of pre-charge voltage, and was better than that of single-stage ESP. The dust collection efficiency under pulse power was better than that under DC supply power; as to PM2.5, which grade efficiency is over 16.9% highter than that of in DC supply power.The dust collection efficiency at electrode-plate space distance 400 mm was higher than that of at 300 mm, and the migration was depply enhanced. Nail electrode had a more contribution than smooth electrode under same base supply voltage. The migration velocity of PM20 under pulse power was over 54.22% highter than that under DC supply power.
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