雾化介质阻挡放电联合电晕放电对染料溶液脱色研究

实验将介质阻挡放电与电晕放电组合在一个反应器内,以靛蓝二磺酸钠溶液为实验废水,将高压电极上通入50Hz交流高压电,在常压空气中形成介质阻挡放电-电晕放电系统,放电产生的低温等离子体及其活性基团作用于染料分子。考察了电源电压、电极间距、处理时间对染料溶液脱色率和能量效率水平的影响,确定反应器工作状态为介质阻挡放电系统电极间距30mm、电晕放电系统电极间距25mm、电源电压20kV。     

Inactivation of MS2 bacteriophage by streamer corona discharge in water

Electrical discharge processes are emerging as water treatment technologies applicable to both the degradation of organic contaminants as well as inactivation of pathogens. Particularly as a disinfection technology, electrical discharge processes do not produce toxic byproducts, and effectively inactivate a wide spectrum of microorganisms by multiple lethal actions generated by the formation of plasma channels. This study demonstrates the inactivation of a virus using the streamer corona discharge process (SCDP) with MS2 phage as a surrogate. A rapid inactivation of MS2 phage (i.e., approximately 4 log inactivation in 5 min) was observed in all experimental runs conducted. Discharge conditions such as applied voltage and storage capacitance significantly affected the inactivation efficiency of MS2 phage, whereas the influence of water quality parameters was minor. In order to elucidate the mechanism of MS2 phage inactivation, potentially lethal factors that can be generated by the SCDP were selected, and their roles in the inactivation of MS2 phage were examined. As a result, effects of UV radiation, chemical oxidants, and pulsed electric fields were found to be insignificant. The shockwave generated upon plasma channel formation appears to be the most important factor responsible for MS2 phage inactivation.     

双区电除尘器降低锅炉烟尘排放浓度

粉尘在传统结构的荷电区荷电之后,一部分尘粒被阳极板捕集,大部分带有正、负电荷的尘粒再分别被收尘区的管式辅助电极和阳极板捕集.模拟试验数据表明,收尘区具有高电压、低电流和板电流密度分布均匀的特性.工业性试验结果显示,应用双区电除尘技术设计或改造电除尘器,不仅可以较好地防止发生反电晕,而且能够将锅炉烟尘排放质量浓度降低到50 mg/m3以下.与传统的卧式电除尘器相比,还可节省10%左右的占地面积和钢材用量.     

电晕线加热降低负离子空气净化器臭氧浓度的实验研究

通过实验研究了臭氧浓度与电晕电流、电晕线线径、电晕线加热功率及供电电压间关系。结果表明：臭氧浓度随电晕电流线性增加；随电晕线线径的减小和电晕线表面温度的提高而下降；电晕线加热是降低负离子空气净化器的臭氧浓度的有效途径。     

Investigations on removal of SO_2 from flue gas by aerosol formation in pulsed corona discharge process

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应用冷等离子体净化尾气中NO的研究

本文设计了轻便的电晕放电装置 ,并用其进行了冷等离子体去除NO的实验研究 ,得到了NO的去除率随放电管的输入功率、NO的初始浓度以及气体的流量而变化的对比曲线。在流量较小 (≤ 0 .0 5m3 /h)或者浓度较低 (≤ 15 0×10 -6)的情况下 ,本文所设计的装置去除NO的效果较好 (>80 % )。该装置体积小、重量轻、功耗低 ,加以改进 ,对于实际的汽车尾气排放控制 ,具有良好的应用前景     

Laboratory and field measurements of NOx produced from corona discharge

This research consists of a laboratory study and a field study. The laboratory research reports the formation of NO_x from a point to plane corona discharge. Discharge polarity and relative humidity determined the amount of NO_x that was produced. The positive point discharge caused more NO_x to form than the negative point discharge. For both polarities NO_x production showed a nonlinear increase with current. Relative humidity enhanced the NO_x formation for both polarities. In each case, the amount of NO_x formed was comparable to the quantity of N₂O produced from corona discharge. The research also reports the results from a field study that measured the amounts of 03 and NO₂ produced by corona discharge during a thunderstorm. The study found that the ambient concentrations of 03 and NO₂ increased several fold due to corona discharge and returned to original levels after the thunderstorm.     

窄脉冲电晕等离子体烟气脱硫产物收集研究

对窄脉总电晕等离子体烟气脱硫过程中的产物收集进行了研究与探讨，结果表明正脉冲流注电晕放电烟气脱硫过程中产生的电粉尘以及电晕极肥大等问题，对脱硫产物的收集有很大影响。     

脉冲电晕等离子体活化纯CO2的反应

研究了在常温常压下，脉冲电晕等离子体对温室气体CO2的活化与转化分别考察了反应气体流速、脉冲电压峰值、放电频率对纯CO2转化的影响．结果表明，CO2主要分解为CO和O2，另有少量积碳和臭氧产生；随着反应气体流速的增加，CO2转化率、CO产率和选择性降低；随着脉冲电压峰值和放电频率的升高，CO2转化率、CO产率增大，CO选择性降低．     

脉冲放电等离子体烟气脱硫脱硝工业试验

40000—50000Nm^3／h工业试验结果表明：烟气温度75℃-80℃，脱硫效率大于90％，脱硝效率大于40％，烟气温度90℃-95℃，脱硫效率大于80％，脱硝效率大于50％；能耗小于3.0Wh／Nm^2；随着温度升高，SO2热化学反应效率逐渐降低；随着氨硫化学计量比增大，氨泄漏逐渐增加，烟气温度90℃。95％，氨泄漏增加更为迅速。并分析了副产物的成分，阐述了脱硫脱硝的机理，探讨了烟气排放的温度。