Fenton氧化法同时脱硫脱硝的实验研究

应用Fenton液相氧化吸收法进行同时脱硫脱硝实验。首先,利用单因素实验,分别考察了H2O2浓度、Fe2+投加量、初始pH值、UV照射和温度对脱硫脱硝的影响。结果表明,SO2和NO去除率随着H2O2浓度和Fe2+投加量的增大而提高;初始pH对SO2和NO的去除有较大影响;UV能促进SO2和NO的净化;温度对脱硫效率影响不大,但对NO的去除有显著作用,适当升温可以提高脱硝效率。随后,考察了SO2对NO去除率的影响。通过单独脱硝和同时脱硫脱硝的对比实验发现,SO2的加入对NO的去除有一定的促进作用,Fenton法可同时获得起始约80%的脱硝效率和98%以上的脱硫效率。

Experimental research of simultaneous desulfurization and denitrification by Fenton oxidation method

The Fenton liquid-phase oxidation method was used for simultaneous desulfurization and denitrification. Firstly,the effect factors, such as H₂O₂ content, Fe²⁺ content, initial pH, ultraviolet irradiation(UV) and temperature, were investigated employing the single-factor experiments, respectively. The results indicated that the removal efficiency of SO₂ and NO increased with the rise of the H₂O₂ content and Fe²⁺ concentration in the aqueous solution. Meanwhile, the variation of initial pH had great impact on the removal efficiency of SO₂ and NO, and the efficiency could be improved when the UV was used. Temperature has little effect on the desulfurization efficiency however it plays a distinct role in the removal of NO. Hence, appropriate improvement of temperature could enhance the denitrification efficiency. Subsequently, the effect of SO₂ on the NO removal was also studied by comparing the experimental results between separate denitrification and simultaneously desulfurization-denitrification. It was shown that the existence of SO₂ slightly improved the removal efficiency of NO, and the initial removal efficiency of NO was about 80% while that of SO₂ was more than 98%.