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《次氯酸钠湿法烟气脱硝及同时脱硫脱硝技术研究_肖灵.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、DOI:10.13671/j.hjkxxb.2011.06.013第31卷第6期环境科学学报Vol.31,No.62011年6月ActaScientiaeCircumstantiaeJun.,2011肖灵,程斌,莫建松,等.2011.次氯酸钠湿法烟气脱硝及同时脱硫脱硝技术研究[J].环境科学学报,31(6):1175-1180XiaoL,ChengB,MoJS,etal.2011.RemovalofNOandSO2fromfluegasbywetscrubbingusingaqueousNaClOsolution[J].ActaScientia
2、eCircumstantiae,31(6):1175-1180次氯酸钠湿法烟气脱硝及同时脱硫脱硝技术研究1,2221,2,*1,2肖灵,程斌,莫建松,王海强,吴忠标1.浙江大学环境工程研究所,杭州3100272.浙江省工业锅炉炉窑烟气污染控制工程技术研究中心,杭州310027收稿日期:2010-09-27修回日期:2010-11-25录用日期:2010-12-01摘要:采用NaClO作氧化吸收剂,在鼓泡反应装置进行了湿法烟气脱硝实验研究,考察了NaClO、NO浓度、液相温度、气体流量、pH对脱硝效率的影响以及SO2对同时脱硫脱硝效率的影响,并结
3、合液相产物分析探讨了同时脱硫脱硝反应机理.研究结果表明,pH值是影响活性成分HClO存在形式的重要因素,同时也是影响氧化吸收的关键因素;在一定范围内,增加氧化剂浓度和NO浓度以及降低气相流量均可提高NOx的去除率,但温度超过60℃不利于氧化吸收的进行;SO2的加入促进了NO的氧化吸收,脱硝效率由43.24%提高到53.03%,脱硫率则接近100%.关键词:NaClO;湿法脱硝;同时脱硫脱硝;机理文章编号:0253-2468(2011)06-1175-06中图分类号:X701文献标识码:ARemovalofNOandSO2fromfluegasb
4、ywetscrubbingusingaqueousNaClOsolution1,2221,2,*1,2XIAOLing,CHENGBin,MOJiansong,WANGHaiqiang,WUZhongbiao1.DepartmentofEnvironmentEngineering,ZhejiangUniversity,Hangzhou3100272.ZhejiangProvincialEngineeringResearchCenterofIndustrialBoiler&FurnaceFlueGasPollutionControl,Hangzh
5、ou310027Received27September2010;receivedinrevisedform25November2010;accepted1December2010Abstract:ExperimentsonDeNOxwereconductedinalab-scalebubblingreactorwithNaClOastheoxidantandsorbent.WestudiedthemainfactorsinfluencingNOconversionefficiency,andproposeareactionmechanismof
6、simultaneousremovalofNOandSO2byNaClO.TheresultsindicatedthatinitialpHwasasignificantfactorinthedenitrificationprocess.TheNOconversionefficiencywasimprovedbyincreasingtheNaClOconcentrationandtheinletNOconcentration,whilehighsolutiontemperaturewasnotbeneficialfortheremovalofNO
7、.AtpH5.5,NaClOwasanexcellentscrubbingmediumfortheabsorptionofNO.ThebestabsorptionefficiencyamongtheindividualDeNOxexperimentswas43.24%.TheresultsofthecombinedDeSOx/DeNOxexperimentsshowedthatSO2couldimprovetheabsorptionofNO2,andthebestDeNOxandDeSOxefficienciesreached53.03%and
8、100%,respectively.Thus,NaClOcouldbeanexcellentoxidantandsorbentforsimultane
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