等离子体资源化模拟烟气脱硫的实验研究

针对目前传统烟气脱硫方法不能完全满足需要的情况,采用强电离放电的方法产生非平衡等离子体,进行了不外加吸收剂和催化剂的SO2脱除实验研究,该法在密闭的等离子体反应器中将SO2直接氧化为H2SO4,实现资源化脱硫且无二次污染。实验分别研究烟气的φ(H2O)、初始φ(SO2)、外加电压U、停留时间tr等因素对脱硫效率η的影响。结果表明,U=3.5 kV、气体流量Q=0.16 m3/h、φ(H2O)=2.1%t、r=0.85 s时,η可达80%。

Study on Plasma Technology of Simulating Flue Gas Desulfurization and Resource Utilization

Along with the national economy continually development,SO_2 and the acid rain pollution problem is serious increasingly,the traditional desulphurization methods already could not completely satisfied to the developing need.It urgently needs to research and develop a new desulphurization technology.In this paper,using strong ionization discharge method,a majority of gas molecules in the air such as O_2 and H_2O are ionized and make into OH~* of high concentration.Under the condition of normal temperature,non-catalyst and non-absorbent,SO_2 is directly oxidized into fog drops of H_2SO_4 in plasma reactor,and then is collected as an important chemical resource in electric precipitator.It has realized flue gas desulfurization and resource utilization without the second pollution.This paper discusses the desulfurization mechanisms using strong ionization discharge,and some factors effecting the SO_2 removal efficiency,such as: different SO_2 primary concentration,input voltage, water content,residence time,are respectively studied in the experiment.The results show that the desulfurization rate is 80% under the condition of 3.5 kV input voltage,0.85 s reaction time and 2.1% water content with the gas flow of 0.16 m~3/h.The flue gas desulfurization method using strong ionization discharge will be hopeful to solve the problems which exists in ionization discharge desulphurization methods at present.It will provide a new desulphurization method without any catalyst and absorbent to solve SO_2 and the acid rain pollution problem in the world.