LARGE VOLUME STREAMER DISCHARGES PRODUCED BY PULSED POWER

脉冲功率技术以短脉冲宽度处理极大功率。重复频率脉冲功率发生器的发展为脉冲功率的工业应用提供了可能。应用领域包括燃煤电厂和移动的汽车的废气处理、二恶英和二恶英的处理、VOC的处理和紫外线光源。虽然这些应用都是利用大气中大体积的流注放电，但对流注放电现象的研究还不够深入，本研究的主要目的就是研究大气中大体积的流注放电。然后，流光放电等离子体和废气处理之间的关系进行了研究。流注到达外电极后，产生具有相对高电导率的等离子体。流光放电等离子体对NOx有很大的处理效果。具有相对高的电导率的等离子体对NOx去除的影响较小。因此，具有适当脉宽的脉冲功率对于获得高的NOx去除效率是重要的。将这些技术应用于真实的燃煤电厂，NO去除率达到90%以上。用光谱法和激光诱导荧光法测定了NO、OH自由基的电子能量和时间变化。并将实验结果与计算机模拟结果进行了比较。

Pulsed power technology treats extremely large power with a short pulse width. The development of repetitive pulsed power generators increases the possibility of industrial applications of pulsed power. The fields of applications are exhaust gas treatments from coal power plants and mobile cars, treatments of dioxin and flon, treatment of VOC and light source of ultraviolet. Though these applications use the streamer discharges with a large volume in atmosphere, the phenomena of streamer discharges have not been investigated in detail.The main purpose of this research is to investigate the streamer discharges with the large volume in atmosphere. Then, the relationship between streamer discharge plasmas and the treatment of exhaust gases is investigated. After the streamer arrives at the outer electrode, the plasma with relatively high conductivity is produced. The streamer discharge plasma has a large effect to treat the NOx. The plasma with relatively high conductivity has a small effect for NOx removal. Therefore, the pulse power with a proper pulse width is important to get a high efficiency of NOx removal. These techniques were applied to the real coal power plant, and 90% of NO removal was attained. Electron energy, temporal change of NO, OH radical were also measured by spectroscopy and laser induced fluorescence. The comparison between experimental results and computer simulation was done too.