脉冲电晕放电协同烟气脱硫脱硝试验研究

Simultaneous removal of NO and SO_2 from flue gas by pulsed corona discharge

脉冲电晕放电对PM2.5具有一定的凝并作用,与直流静电除尘器相结合可以提高燃煤电厂烟气中粉尘的脱除效率,基于脉冲电晕放电还可以将烟气中的NO、SO2氧化成NO2、SO3等易吸收的物质成分,与传统的液相吸收洗涤技术相结合可提高NO、SO2的脱除效率.文中进行了脉冲电晕放电协同烟气脱硫脱硝的试验研究,研究了影响NO、SO2转化效率的主要因素.实验结果表明,提高脉冲峰值电压、脉冲频率、脉冲放电电极数目,延长停留时间,降低气体初始浓度有助于提高NO、SO2的转化效率;增加空气湿度可以显著提高SO2的转化效率.在本试验中,当NO、SO2初始浓度为150×10-6左右时,其相应的转化效率可以分别达到70%、90%.

The Electrostatic Precipitator （ESP） combined with a pulsed power source can convert NO and SO2, to NO2, and SO3 with increased PM2.5 capture efficiency. Simultaneous removal of NO and SO2 from flue gas hy pulsed corona discharge was experimentally investigated. This paper focuses on the main factors influencing NO and SO2 conversion effieiencies. The results indicated that by increasing pulse peak voltage, pulse frequency, number of electrodes, residence time anti decreasing initial concentrations, the conversion efficiencies can he improved, High air humidity played an important role in SO2 conversion efficieucy. The NO and SO2 conversion efflciencies reached 70% and 90% with initial concentrations of about 150 ×10^ -6 in the experimental system.