脉冲双介质阻挡放电等离子体降解恶臭气体的实验研究

Experimental Study on Degradation of Malodorous Gas by Pulsed Dimedia Block Discharge Plasma

为研究不同条件下脉冲放电低温等离子体对恶臭废气氨气降解率的影响,研究人员搭建了一套管式双介质阻挡等离子体废气处理实验装置,设计了电源输出参数检测电路,采用示波器实时检测电源输出参数,采用便携式氨气检测仪快速检测废气处理后浓度,研究了电源输入功率、气体流量、气体浓度、脉冲频率和脉冲占空比对低温等离子体降解氨气的规律。结果表明:输入功率增加,氨气降解效率线型提高,最终基本实现完全降解。氨气降解率与气体流量和气体浓度成反相关,流量越大、浓度越高,氨气降解率迅速下降。存在最佳的脉冲频率最有利于废气降解。随着脉冲占空比提高,氨气降解率稍有提升然后迅速下降。

In order to study the effect of pulse discharge low-temperature plasma on odor exhaust gas ammonia degradation rate under different conditions,a set of tubular two-medium blocking plasma exhaust gas treatment experimental device was built.Experimenters designed the power output parameter detection circuit,used oscilloscope detected power output parameters in real time,quickly detected the concentration of exhaust gas treatment,and studied the law of power supply input power,gas flow,gas concentration,pulse frequency and pulse duty cycle.The results show that the input power increases,the ammonia degradation eff iciency improves,and the complete degradation is basically realized.The ammonia degradation rate is inversely correlated with the gas flow rate and the gas concentration,and the large the flow rate and the higher the concentration,the ammonia degradation rate decreases rapidly.The presence of an optimal pulse frequency is most favorable to exhaust gas degradation.As the pulse duty cycle increases,the ammonia degradation rate increases slightly and then decreases rapidly.