为提高介质阻挡放电（DBD）系统降解H₂S的能量利用效率，以同轴DBD反应系统为对象，从谐振特性和功率特性两方面研究了DBD放电系统的电气参数和反应器几何参数对反应器能量输入和H₂S脱除效果的影响。研究发现，放电频率与负载电压之间的谐振特性直接影响H₂S脱除效率，在谐振频率点脱除效率最大。谐振频率的大小受负载电压和反应器几何参数的影响，其原因可以归结于介质层等效电容的变化。DBD放电有效功率与放电频率、负载电压和反应器几何参数间存在量化规律P=A·L·f·Vⁿ，且在相同的负载电压下，谐振频率点的能量输入效率η_P最大。其他条件不变的情况下，放电区域长度越大，H₂S脱除效率越高；放电气隙的大小存在最优值，本文中最优的放电气隙为5 mm。

To improve the energy utilization efficiency of H₂S decomposition by dielectric barrier discharge (DBD),a series of experiments are performed.Taking coaxial DBD reactive system as object,the influences of DBD's electrical parameters and reactor geometrical parameters on the energy input and H₂S removal efficiency are studied from aspects of resonance characteristics and power characteristics.The experimental results show that the resonance behavior between discharge frequency and loading voltage affects directly the H₂S removal efficiency.The removal efficiency reaches its maximum value at resonance frequency point.The reason that the loading voltage and reactor geometrical parameters have an effect on the size of resonance frequency can be attributed to the changes of dielectric equivalent capacitance.Moreover,the effective discharge power of DBD has quantitative rule with discharge frequency,loading voltage and reactor's geometrical parameters,i.e.P=A·L·f·Vⁿ.The energy input efficiency η_P is the largest at resonance frequency point when the loading voltage remains unchanged.If the other operating parameters remain unchanged,the longer the discharge area is,the higher the H₂S removal efficiency is.The optimal discharge gap is 5 mm.

赵冲(1993-),男,硕士生