电晕放电自由基簇射同时脱硫脱硝反应特性研究  

Study on the Reactive Characteristics of Simultaneous Removal of SO_2 and NO_x by Corona Discharge Radical Shower System

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

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

出　　处：《高校化学工程学报》2008年第2期325-331,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家重点基础研究发展规划项目(206CB200303);浙江省自然科学基金(Y507079);浙江工商大学青年人才基金(Q07-11)

摘　　要：对电晕放电自由基簇射技术同时脱硫脱硝过程进行了详细的实验研究和分析,揭示了反应特性,探讨了反应机理。研究结果表明:SO2的脱除主要依靠和氨气的热化学反应,但自由基反应对其脱除也有一定的促进作用。而NOx脱除主要依靠电晕放电过程,NH、NH2、OH的自由基反应以及亚硫酸盐对NO2的还原反应起了重要的作用。氨气注入的增加能够促进SO2和NOx的脱除,而NOx对氨气的敏感性要明显低于SO2。随着能量注入的增加,SO2和NOx脱除的能量利用率先显著下降,在能量密度大于3W?h?m?3之后趋于稳定。The reactive characteristics and mechanism of the process of removing SO2 and NOx simultaneously via using the corona discharge radical shower technology were studied.The results show that the SO2 removal is dependent on the thermal reaction with the ammonia in the gas injection,and the radical reactions can further improve its removal at a certain extent.However,the NOx removal depends on the corona discharge process mainly,and the radical reactions of NH,NH2 and OH and the reactions between sulfites and NO2 also play important roles in removing NOx.It was found that the increase of NH3 content in the injection gas can improve the removal of SO2 and NOx,while among them the NOx removal has weaker sensitivity on NH3 content than that of SO2 removal.With the increase of energy input,the input energy utilization ratio of SO2 and NOx removals decrease obviously at first,and then turn into stable when the energy input reaches and over 3 W·h·m^-3.

关 键 词：电晕 自由基簇射 脱硫 脱硝 

分 类 号：O646.9[理学—物理化学] TQ534.9[理学—化学]