KMnO_4氧化复合NaOH液相吸收同时脱硫脱硝的实验研究

利用鼓泡吸收装置研究了KMnO_4/NaOH氧化吸收NO和SO_2过程,得出以下结论:同时脱硫脱硝时的脱硝效果要好于单独脱硝,但脱硫效果相差相当;KMnO_4和NaOH初始浓度的增加都能促进NO_x的脱除,但KMnO_4的促进作用更加明显;较低浓度SO_2的加入可促进NO_x脱除,然而过高浓度的SO_2会抑制NO_x的脱除。KMnO_4/NaOH同时脱硫脱硝可使脱硝率达70%左右,且脱硫率达98%以上,总体上效果理想。

EXPERIMENTAL STUDY ON SIMULTANEOUS DESULFURIZATION AND DENITRIFICATION BY KMnO4 OXIDATION COMBINING NaOH LIQUID ABSORPTION

Experiments on simultaneous removal of NO and SO2were carried out in a lab-scale bubbling reactor with NaOH/KMnO4 solution.The results were as follows:NOx removal efficiency of simultaneous desulfurization and denitrification was better than that of single denitrification.But SO2 removal efficiencies at the two cases were almost same.With KMnO4 or NaOH initial concentration increased,NOx removal was improved.But KMnO4 was more important for NOx removal than NaOH.While SO2 concentration was low,adding SO2 could raise NOx removal efficiency.While SO2 concentration was higher than 1 715 mg/m3,SO2 had negative effect on NOx removal.Simultaneous desulfurization and denitrification by KMnO4 oxidation combining NaOH liquid absorption in this experiment could obtain an ideal desuffurization and denitrification effect,with NOx removal efficiency of 70％ and SO2 removal efficiency above 98％.