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化工学报  2012 

UV/H2O2氧化联合Ca(OH)2吸收同时脱硫脱硝

DOI: 10.3969/j.issn.0438-1157.2012.10.038, PP. 3277-3283

Keywords: UV/H2O2,氧化,NO,SO2,Ca(OH)2

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Abstract:

在小型紫外光-鼓泡床反应器中,对UV/H2O2氧化联合Ca(OH)2吸收同时脱除燃煤烟气中NO与SO2的主要影响因素[H2O2浓度、紫外光辐射强度、Ca(OH)2浓度、NO浓度、溶液温度、烟气流量以及SO2浓度]进行了考察。采用烟气分析仪和离子色谱仪分别对尾气中的NO2和液相阴离子作了检测分析。结果显示:在本文所有实验条件下,SO2均能实现完全脱除。随着H2O2浓度、紫外光辐射强度和Ca(OH)2浓度的增加,NO的脱除效率均呈现先大幅度增加后轻微变化的趋势。NO脱除效率随烟气流量和NO浓度的增加均有大幅度下降。随着溶液温度和SO2浓度的增加,NO脱除效率仅有微小的下降。离子色谱分析表明,反应产物主要是SO42-和NO3-,同时有少量的NO2-产生。尾气中未能检测到有害气体NO2。

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