介质阻挡放电与介质阻挡电晕放电用于空气脱硫的比较

Investigation of Dielectric Barrier Discharge and Dielectric Barrier Corona Discharge in SO_2 Removal

采用同轴管状反应器产生介质阻挡放电,采用同轴线管反应器产生局部电晕放电及介质阻挡电晕放电,研究介质阻挡放电与介质阻挡电晕放电在放电特性与脱硫能耗上的差异.根据V qLissajous图形计算了放电功率、气隙电压及电场强度分布.研究结果表明,相同外施电压下同轴管状反应器比同轴线管反应器具有更高的放电电流,同轴线管反应器中脱除SO2的能量利用率可达31g/kW·h,而在同轴管状反应器中能量利用率可达39g/kW·h.根据气隙放电时电场强度的分布解释了脱硫能量利用率的变化.

The dielectric barrier corona discharge (DBCD) in a wire-cylinder configuration and the dielectric barrier discharge (DBD) in a coaxial cylinder configuration are investigated, then the dissipated power and gas gap voltage are calculated by analyzing the measured Lissajous figure. The researching results demonstrate that the discharge current in DBD has higher pulse amplitude than in DBCD, and with the increasing applied voltage, the energy utilization factor for SO2 removal increases in DBCD but decreases in DBD due to the difference in their electric field distribution. The experiments of SO2 removal verify that in the absence of NH3 the energy utilization factor can reach 31 g/kWh in DBCD and 39 g/kWh in DBD.