电晕耦合无声放电脱硫脱硝反应器结构模拟

Study on the Structure of Corona Coupling Silent Discharge Reactor Used in Removing SO_2 and NO

为给非热等离子体烟气脱硫脱硝提供理想的反应器,分析了电晕耦合无声放电结构,并通过数值模拟对比研究了它与电晕放电结构的静电场分布特征。通过对比分析电晕放电结构和无声放电结构产生的非热等离子体特点,发现电晕耦合无声放电结构是一种理想的大气压非热等离子体产生结构,同时分析了电晕耦合无声放电结构及其优点。通过耦合放电结构和电晕放电结构的静电场数值模拟,发现阻挡介质板的加入提高了放电区域的电场强度,放电区域内电场强度的增大有利于流光放电的发生,同时提高了折合电场强度,进而提高了放电产生的电子能量,有助于生成更多的活性自由基。

In order to provide an ideal structure of the reactor used in removing 502 and NO, the corona coupling silent discharge structure was put forward and the distributions of electrostatic fields of the coupling discharge structure and corona discharge structure were comparatively investigated by numerical simulations. Through the comparison analyses of the plasmas produced by the corona discharge and the silent discharge, the corona coupling silent discharge structure was found to be an ideal structure producing plasma. The coupling structure and its advantages were also analyzed. The numerical simulations have shown that the electrical field intensity of the coupling structure can be increased by dielectric barrier. The increased electrical field can not only help to form streamer discharge, but also cause reduced electrical field intensity increased. Then the increased reduced electrical field intensity can cause the electron energy increased and this is helpful in producing more active free radicals.