Wire-Tube DBD Reactor for H_2S Treatment:Comparison of Single-Mode and Parallel-Mode Reactor

摘要

In this paper,the discharge characteristics of single mode and two identical DBD discharge mod-ules connected in parallel were investigated based on the wire-tube dielectric barrier discharge(DBD)reac-tor and the effect of parallel DBD discharge modules for the treatment of H_2S exhaust gas was investigated.The experimental results showed that the load voltage and discharge power of both modes tended to increase as the applied voltage increased,but the load voltage and discharge power of the parallel mode were lower than those of the single mode at the same applied voltage.However,the parallel structure of the DBD module was more suitable for the treatment of high flow rate and low concentration of H_2S exhaust gas.With the DBD modules in parallel,the efficiency of the H_2S exhaust gas treatment increased with increas-ing energy density for different initial concentrations.At an energy density of 1819 J·L~(-1),H_2S exhaust gas with an initial concentration of 100 mg·m~(-3) and a gas flow rate of 160 L·h~(-1) could be treated with an efficiency of 86.4％.The overall removal efficiency,removal efficiency per unit power,and energy uti-lization efficiency of the single mode were higher than those of the parallel mode;however,in terms ofenergy consumption,it is more pronounced than the parallel mode.