烟气成分对电晕放电NO转化过程的影响  

Influence of flue gas components on NO conversion process by corona discharge

作　　者：高翔[1] 吴祖良[2] 孙培德[2] 李济吾[2] 骆仲泱 倪明江[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027 [2]浙江工商大学环境工程学系,浙江杭州310035

出　　处：《浙江大学学报（工学版）》2008年第5期880-884,共5页Journal of Zhejiang University：Engineering Science

基　　金：浙江省自然科学基金资助项目(Y507079);浙江省工商大学青年人才基金资助项目(Q07-11);浙江省教育厅资助项目(Y200702725);国家“973”重点基础研究发展规划资助项目(2006CB200303)

摘　　要：研究了不同的烟气成分对电晕放电自由基簇射NO转化过程的影响.结果表明,烟气中的N2不利于流光电晕的形成.提高O2体积分数能够促进流光电晕的发展,增大放电电流,从而提高NO的脱除率以及NO向NO2的转化率.为了产生稳定而强烈的流光电晕,烟气中O2体积分数不应小于5%.在烟气中加入CO2,虽然能够促进流光电晕的形成并改善其稳定性,但是由于CO2的强电负性,大量增加CO2会抑制放电电流的产生以及氧化性自由基的产生,最终导致NO脱除率和NO向NO2的转化率降低.The corona discharge radical shower NO conversion process was studied under different flue gas components. The following results were obtained： The N2 in the flue gas is disadvantage of the streamer formation. Increasing O2 volume fraction can improve the development of streamer and heighten the discharge current, which is helpful to increase NO removal rate and NO conversion rate into NO2. In order to produce stable and intensive streamer corona, the O2 volume fraction in the flue gas should not be lower than 5 % Adding CO2 in the flue gas can improve the formation and stability of streamer corona. However, a great deal of CO2 restrains the discharge current and decreases the production of oxidative radicals because of its strongly electronegative characteristics, which leads to reduction of NO removal rate and NO conversion rate into NO2.

关 键 词：烟气成分 电晕 NO 

分 类 号：TQ534.9[化学工程—煤化学工程]