烟气处理时乙二胺合钴高效脱NO实验研究  

Experimental research on Co(en)_3^(3+) efficiently removing NO from flume

作　　者：周春琼[1] 邓先和[1] 

机构地区：[1]华南理工大学化工与能源学院

出　　处：《化学工程》2008年第4期53-56,共4页Chemical Engineering(China)

基　　金：广州市科技计划资助项目(2006Z2-D9041)

摘　　要：烟气同时脱硫脱氮中NO脱除是关键问题,乙二胺合钴具有高效脱NO能力,但Co2(SO3)3沉淀的生成导致脱氮率迅速降低,本研究在乙二胺合钴中加入尿素,使吸收后SO2高效氧化生成易溶于水的Co2(SO4)3,避免降低脱NO活性组分乙二胺合钴的浓度,而保证高效同时脱硫脱氮。实验证明:尿素质量分数的大小对SO2氧化率影响很大;吸收液pH值增大,反应温度的升高及氧气体积分数的增大,都可提高SO2氧化率;在乙二胺合钴溶液中加入尿素,在保证SO2氧化率几乎达到100%的同时,也保证较长时间内NO脱除率在95%以上。NO removal is a key problem of simultaneous removal of SO2 and NO from the flume. It is proved that triethylenediamine cobalt （Ⅲ） （ Co （en）3^3＋ ） can efficiently remove NO. However, the precipitation of Co2 （ SO3 ） 3 will lead to the quick decrease of Co （en）3^3＋ concentration and NO removal rate. In this test urea was added into the absorption solution of Co （en）3^3＋ to increase SO2 oxidation rate and generate the water-soluble Co2 （ SO4 ） 3 which keeps high concentration of Co （en） 3^3＋ and ensures high NO removal rate. The bigger mass fraction of urea can increase SO2 oxidation rate. The rise of pH value of the tion solution, the reaction temperature, and the volume fraction of oxygen can also increase SO2 oxidation rate NO removal rate. The system of Co（ en）3^3＋ and urea can keep almost 100% SO2 oxidation rate and more than 95% NO removal rate in a long time.

关 键 词：尿素 乙二胺合钴 SO2高效氧化 同时脱硫脱氮 

分 类 号：X701[环境科学与工程—环境工程]