脉冲等离子体反应器放电特性研究

脉冲放电等离子体被广泛用于气态污染物处理的研究,放电参数直接影响反应器内等离子体状态,进而影响污染物的去除效果,研究不同条件下的放电特性可为脉冲等离子体技术的应用提供参考.本文利用线板式脉冲等离子体反应器, BPFN型高压脉冲电源供电, 研究了电源电容、极板间距及介质阻挡对放电特性的影响.结果表明:增大电源电容可以有效地提高电源能量效率;增大极板间距,峰值电压VP增大,峰值电流IP减小,脉宽减小,波形更加理想;陶瓷板阻挡放电可解决间隙火花放电,使脉冲电晕放电空间分布均匀,在大范围内提高电源能量效率.

Investigation of pulse plasma reactor discharge characteristics

The pulse discharge plasma chemical process(PPCP) has been widely investigated to remove toxic compounds,and electrical parameters are directly related to the formation of discharge plasma and the removal efficiencies of contaminants,so it is necessary to make research on discharge characteristics under different conditions in order to provide reference for PPCP application.In the experiments,a Blumlein pulse-forming network(BPFN) type of narrow pulse generator and a wire-plate pulse plasma reactor were adopted.The influences of factors such as power supply capacitance,plate distance and dielectric barrier on discharge characteristics were investigated.The results show that increasing the power supply capacitance can improve the utilization efficiency of discharge energy;increasing the plate distance will result in higher peak voltage,lower peak current and shorter pulse width and achieve better waveforms;the dielectric barrier can help solving the spark discharge,and also improve the utilization efficiency of discharge energy.