脉冲放电等离子体烟气脱硫脱硝工业试验研究

Industrial experiments on desulphurization and denitrification of flue gases by pulsed corona induced plasma chemical process

40000～50000Nm^3／h工业试验结果表明，烟气温度75～80℃，脱硫效率〉90％，脱硝效率〉40％，烟气温度90～95℃，脱硫效率＞80％，脱硝效率＞50％；脉冲能耗＜3Wh／Nm^3；随着温度升高，SO2热化学反应效率逐渐降低；随着氨硫化学计量比增大，氨泄漏逐渐增加，烟气温度90～95℃，氨泄漏增加更为迅速。并分析了副产物的成分，阐述了脱硫脱硝的机理，并探讨了烟气排放的温度。

Industrial experiments have been conducted on an industrial middle scale set with the flue gas flow at 40 000 to 50 000 Nm^3/h and the results indicate as follows： the removal rates of SO2 and NOx are over 90% and 40% respectively at the temperature of 75～80℃ ;however, while the temperature is in the range of 90～95℃ , the removal rates of SO2 and NO are over 80% and 50% , respectively;the energy consumption of pulsed corona is less than 3 Wh/Nm^3 ;SO2 removal rate via the thermal reaction declines gradually with the temperature increasing; in addition, with the stoichiometric ratio of NH3 and SO2 increasing, NH3 leakage increases, and rather large amount of NH3 leakage is observed while the temperature is from 90 to 95℃. Meanwhile, the ingredient of the by-product is investigated, and the mechanisms of desulphurization and denitrification and the outlet gas temperature are discussed in this paper.