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High-efficient removal of airborne oil mist in a wire-plate electrostatic precipitator
Journal of Electrostatics ( IF 1.8 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.elstat.2020.103516
Siyi Zhang , Wuxuan Pan , Hongsheng Zhang , Zhengwei Long , Tao Yu

Abstract Electrostatic precipitators (ESPs) are widely used by machining industries to remove oil mist due to the high efficiency, low pressure drop and low energy consumption. In this paper, the effects of oil mist concentration, relative humidity and oil film thickness on the collection efficiency of ESPs were studied. The experimental results showed that discharge current and collection efficiency both decreased with increasing oil mist concentration, and the collection efficiency of fine oil droplets decreased more obviously than that of large-size oil droplets. When the oil mist concentration increased from 100 mg/m3 to 300 mg/m3, collection efficiency of oil droplets with a size of 0.33 μm dropped from 87.13% to 73.53%, while the efficiency for the droplet size of 1.25 μm only dropped from 90.7% to 84.1%. Increasing the relative humidity caused a considerable decline in discharge current due to the decrease in ion mobility, but an appropriate increase in humidity was conducive to the improvement of collection efficiency. The stable status of oil film thickness on electrode plate was obtained (about 10 μm in the current study), and the stable current density decreased almost 11% due to the oil film. Compared with the oil droplets deposited on the electrode wires, the oil droplets deposited on the plate caused more decrease of collection efficiency of ESPs. The decrease in collection efficiency effected by the electrode plate with oil film was twice that of the electrode wires with oil contamination.

中文翻译:

线板静电除尘器高效去除空气中的油雾

摘要 静电除尘器(ESPs)具有高效、低压降、低能耗等优点,被机械加工行业广泛用于去除油雾。本文研究了油雾浓度、相对湿度和油膜厚度对静电除尘器收集效率的影响。实验结果表明,放电电流和捕集效率都随着油雾浓度的增加而降低,细小油滴的捕集效率比大尺寸油滴的降低更明显。当油雾浓度从100 mg/m3增加到300 mg/m3时,0.33 μm油滴的捕集效率从87.13%下降到73.53%,而1.25 μm油滴的捕集效率仅从90.7下降% 到 84.1%。增加相对湿度会导致离子迁移率下降导致放电电流大幅下降,但适当增加湿度有利于收集效率的提高。获得了电极板上油膜厚度的稳定状态(目前研究中约为10μm),由于油膜,稳定电流密度下降了近11%。与沉积在电极丝上的油滴相比,沉积在极板上的油滴对静电除尘器的收集效率降低更多。带有油膜的电极板对收集效率的影响是带有油污的电极线的两倍。但适当增加湿度有利于收集效率的提高。获得了电极板上油膜厚度的稳定状态(目前研究中约为10μm),由于油膜,稳定电流密度下降了近11%。与沉积在电极丝上的油滴相比,沉积在极板上的油滴对静电除尘器的收集效率降低更多。带有油膜的电极板对收集效率的影响是带有油污的电极线的两倍。但适当增加湿度有利于收集效率的提高。获得了电极板上油膜厚度的稳定状态(目前研究中约为10μm),由于油膜,稳定电流密度下降了近11%。与沉积在电极丝上的油滴相比,沉积在极板上的油滴对静电除尘器的收集效率降低更多。带有油膜的电极板对收集效率的影响是带有油污的电极线的两倍。与沉积在电极丝上的油滴相比,沉积在极板上的油滴对静电除尘器的收集效率降低更多。带有油膜的电极板对收集效率的影响是带有油污的电极线的两倍。与沉积在电极丝上的油滴相比,沉积在极板上的油滴对静电除尘器的收集效率降低更多。带有油膜的电极板对收集效率的影响是带有油污的电极线的两倍。
更新日期:2020-11-01
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