【摘要】 放电极几何形状及高压电源额定电流的选择对于电除尘器设计非常重要,为给电除尘器设计提供依据,对不同放电极对应电场特性进行研究非常必要。采用工业高压电源搭建了实验平台,对实际的BS芒刺电极和增强型RS芒刺电极对应电场特性进行了研究,观察了放电极上的电晕放电位置,测量了不同放电极对应的伏安关系及收尘极上的电流密度分布,并将实验获得的收尘极电流密度分布与Warburg理论结果进行了比较。结果表明,电晕放电主要集中在芒刺尖端,对于BS芒刺电极和增强型RS芒刺电极,其对应的收尘极电流密度均呈现非均匀分布;BS芒刺电极既可提高波谷区域电流密度,也可改善电流密度分布,但增强型RS芒刺电极无明显效果。BS芒刺电极应优先用于电除尘器前级电场,其对应高压电源的额定电流应依据0.8 m A/m2-1.0 m A/m2的平均电流密度进行确定。更多还原

【Abstract】 Selections of discharge electrode type and the rated current are important in electrostatic precipitator design. In order to provide evidence for the selection, the study of electric field characteristics is necessary. This paper establishes an experimental platform with industrial high voltage source to study the electric field characteristics for the factual BS and enhanced RS barbed electrodes. The locations where the corona discharge occurs are observed, and the voltage current relation and the current density distribution are measured. In addition, the comparison between the experimental current density distribution and the Warburg theoretical result is also completed. The research results show that the corona discharge mainly occurs on the tips of the electrode, and the current density distribution is not uniform on the collecting plate for both BS and enhanced RS electrodes. The BS barbed electrode can increase the current density on the area that faces to the tube obviously and improve the distribution on the collecting plate, but the enhanced RS electrode has no effect. As a result, the BS barbed electrode should be more suitable for application in the preceding fields of electrostatic precipitator, but the relevant rated current of the high voltage source should be determined on the basis of the average current density scale of 0.8 m A/m2 ~ 1.0 m A/m2.更多还原