单电极尖端放电等离子体NOx还原特性试验研究

利用新型低能耗N2-NO系统单电极尖端放电等离子体NOx还原试验系统，得到了对实际多电极放电等离子体NOx脱除有指导意义的还原特性．在建立N2-NO系统单电极尖端放电等离子体NO还原试验系统的基础上，以电极极间电压表征电场物理特性，尖端距离表征电极几何特性，得到了电场物理特性及电极几何特性对活性N原子产生及脱硝率的影响规律．试验结果表明，脱硝率随尖端距离的增大而先增后减，随极间电压和气体停留时间的增大而增大，尖端距离是决定电极之间的电场强度和气流停留时间的关键几何变量．利用活性N原子的产生条件解释了放电外轮廓直径及电场强度随尖端距离变化的消长规律．

Experimental Study on the Characteristics of NOx Reduction with Single-Electrode Tip Discharge Plasma

As a new type of NO removal system, NO reduction in N_2-NO plasma one is applied to solve the difficulties in the traditional methods, such as higher energy-consumption, larger equipment size and more expensive cost, etc. Using the experimental NO removal system with single-electrode tip discharge structure, the NO reduction characteristics of N_2-NO system were revealed to guide the engineering practice. The amount of active N atom and NO removal rate both increase at the beginning of the increasing distance between two tips and then drop while the distance exceeds to a certain value, the NO removal rate increases while the voltage between two electrodes or the resident time of gas flow increases. The distance is a key geometrical variable which can determine the electric field intensity between two electrodes and gas flow resident time .