中文摘要：

针对染料废水常规方法难降解等问题,通过使用自行研制的高压窄脉冲电源系统,试验分析了流光放电等离子体对染料污染物主要代表亚甲基蓝（MB）的处理效果。介绍了流光电源装置的构成及工作性能,核心元件八电极旋转火花隙开关（E-RSGS）的结构设计可产生电场畸变从而减少开关开断时间,有利于流光产生;同时延长开关寿命,简化开关绝缘设计。考察了液相流光放电条件下,脉冲电压峰值等因素对亚甲基蓝去除率的影响。实验结果表明：工业质量浓度范围内,提高峰值电压和放电频率可加大注入流光的能量密度,空气曝气量即空气体积流量的增大则增强了水中微泡局放强度,从而提高水中污染物的氧化速度。相同注入能量条件下,氧化效率随溶液量的增大而减小;高电导率会抑制流光形成,随亚甲基蓝质量浓度增大,氧化速度增势趋缓,氧化效率降低。在初始浓度1mol/L、pH=6.3、温度25°C下,等离子体自由基的消耗符合二级复合的特征,体现了氧化效果和摩尔能耗与注入功率密度的平方根线性关系。

英文摘要：

We analyzed the constitution and performance characteristics of a pulse generator,especially,the structure design of rotating spark gap switch（RSGS）,which is the key part that greatly favors electrical field distortion to recover the gap insulation strength for production of streamer,and is also beneficial to simplifying insulation design and prolonging the life of the switch,etc.Moreover,we studied the effects of the main parameters,such as peak voltage,discharge frequency,concentration,volume,air bubbling.Meanwhile,we adopted streamer discharge plasma to oxidize high concentration methylene blue in the liquid phase.The experimental results show that the degradation efficiency and energy density increase with peak voltage and pulse frequency.However,pollutant degradation rate of increase is less than the rate of increase of energy,which can indicate that energy efficiency of low-voltage is higher and consumption of free radical is consistent with the characteristics of the secondary compound.Meanwhile,the electrode style and mass transfer efficiency play important roles in oxidation process.