高频介质阻挡放电烟气脱硫研究

采用高频介质阻挡放电的方式产生低温等离子体,研究在不加入NH₃的情况下流动态SO₂的去除情况.实验表明,在输入电压为12 kV,SO₂浓度为5400 mg/m³,气体流量为0.36 m³/h,相对湿度为55%时,脱硫率可达到70%以上;水气的存在对SO₂的去除有较大的促进作用,升高电压和增加O₂量对脱硫率的促进作用有限.对实验结果进行了解释,并提出了反应机理.

Study of the Desulfurization by High Frequency Dielectric Barrier Discharge

The removal of flowing SO 2 was studied in the absence of NH 3 by cold plasma generated by high frequency dielectric barrier discharge. The results showed that the decomposition rate was over 70% at the experimental conditions of 12 kV input voltage and 55% relative humidity with the SO 2 concentration of 5400 mg/m 3 and the gas flux of 0 36 m 3/h. The added H 2O(g) played an important role in the SO 2 removal, and in addition, the increasing O 2 and input voltage exerted a little influence on the decomposition rate of SO 2. The desulfurization mechanism was also discussed under the analysis of experimental results.