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1、第29卷第20期中国电机工程学报Vol.29No.20Jul.15,20092009年7月15日ProceedingsoftheCSEE©2009Chin.Soc.forElec.Eng.47文章编号:0258-8013(2009)20-0047-05中图分类号:TK224;X511文献标志码:A学科分类号:470⋅20气体先进再燃脱硝试验研究韩奎华,路春美,牛胜利,高攀(燃煤污染物减排国家工程实验室(山东大学),山东省济南市250061)ExperimentalStudyonAdvancedGa
2、sReburningforNOxReductionHANKui-hua,LUChun-mei,NIUSheng-li,GAOPan(NationalEngineeringLaboratoryforCoal-BurningPollutantsEmissionReduction(ShandongUniversity),Jinan250061,ShandongProvince,China)ABSTRACT:Theperformancesofdiversiformadvanced用。还原剂远离燃尽风喷入燃
3、尽区下游适宜温度范围内,可reburning(AR)forNOreductionwereinvestigatedbythe获得更高的脱硝效率和还原剂利用率。先进再燃与SNCRboilersimulatorfacility,inwhichthenaturalgas(NG),the复合脱硝效率可达90%以上,是一种高效的脱硝方法。liquidpetroleumgas(LPG),ammonia,urea,sodiumcarbonate关键词:先进再燃;NO;气体燃料;选择性非催化还原;andethano
4、lwereusedasreburningfuels,N-agentsand添加剂;碳酸钠additivesrespectively.Resultsshowthatthede-NOxefficiencyofARwasimprovedremarkably,comparingwiththereburning.0引言TheefficienciesofARwithNGandLPGwererespectively先进再燃(advancedreburning)是一种将再燃和82%~88%and82%~92%un
5、dertypicalconditionswith选择性非催化还原(selectivenon-catalyticreduction,reburningfuelratioof15%,1273KandmolarratioofN-agenttoNOabout1.5.HowevertheutilizationefficiencyofSNCR)相结合的脱硝技术,即在再燃的基础上将N-agentswaslowerintheARthanintheselective氨、尿素等作为NOx还原剂喷入到再燃区、燃尽区no
6、n-catalyticreduction(SNCR).Sodiumcarbonatecan[1-3]及其下游,通常可以取得80%~90%的脱硝效率。broadenthereactivetemperaturewindoweffectively,but国内的应用研究[4]表明,该工艺满足现有NO排放xethanolrestrainstheNOreductionbyN-agentstoacertain标准,投资运行成本较低,适合我国国情。extent.TheN-agentwasinjectedintot
7、hedownstreamburnout[1]国内外对先进再燃进行了较多研究,Maly研zonewithoptimaltemperaturerangefarfromoverfireair究了再燃燃料种类、再燃比、再燃区停留时间、初injection,thehigherde-NOxefficiencyandavailabilityof始NOx浓度、尿素喷入温度对脱硝效率的影响。N-agentcouldbeachieved.Thede-NOxefficiencyofhybrid[2]AR/SNCRcou
8、ldgetabove90%,whichisaveryeffectiveZamansky研究了氨水和尿素及碳酸钠喷入再燃methodforNOxcontrol.区对脱硝性能的影响,分析了钠盐促进还原剂脱硝的机理,另外,不同煤作再燃燃料、氨气喷入再燃KEYWORDS:advancedreburning;NO;gas;selective区和燃尽区的先进再燃脱硝实验表明效率达到non-catalyticreduction;additive;sodiumcarbonate[3][5-6]85