47惠润堂1,韦飞1,王宝德2,杨爱勇11.2100312.100011:(SCR),SCR()。,SCR,。,SCR,,。,,。:;;(SCR);:TK227;X51:B:1004-9649(2014)10-0110-03::(1963—),,,,、。@0GB13223—2011《》NOx,。(SCR)[1-2]。SCR,SO2SO3,3×10-6(),150~200℃,SO3((NH4)2SO4)(NH4HSO4)[3]。(),。,SCR1%,[4],,,[1]。,SCR。11.19、10660MW,SCRNOx,。SCRNOx600mg/m3(,),2,≥84%。9,;10,。1.22012,。201210410,,20121027,、。,。9。2012111410DCS,450MW,3000Pa。,201211,,4500Pa,1220Pa,2000Pa。,450MW,3000Pa,1200Pa。22.1201211ELECTRICPOWER4710201410Vol.47,No.10Oct.2014110101。,,,,,。22.83MJ/kg,19.66%,1.03%;201210—1118.84MJ/kg,29%,1.9%。,(),,,。2.22012,20121027111,10320~420MW,321MW。327℃。10、,,,10~15℃。,,315℃,,。,。NOx,NOx,,。,,7t8t,10%;,,,,,[5]。3(1),,NH4HSO4,10,,,。(2)NH4HSO4150~220℃[6],,NH4HSO4,,NH4HSO4,,。,NH4HSO4。,,NH4HSO4,NH4HSO4,NH4HSO4,。,10,。,,SO3。NOx,,,,[7]。,,。,,,,,。4(1),NH4HSO4;(2),;(3)、,;(4),,;(5),、,、1201210—11Fig.1CoalanalysisdataofthepowerplantbetweenOctoberandNovemberof2012:SCR11147AnalysisandPreventionofSCRDeNOxCausedAirPreheaterClogging1.StatePowerEnvironmentalProtectionResearchInstitute,Nanjing210031,China;2.NorthChinaElectricPowerDesignInstitute,Beijing100011,ChinaAbstract:Theselectivecatalyticreduction(SCR)iscommonlyusedforfluegasdenitrificationincoalfiredpowerplants.CorrosionandcloggingtendtohappenintheairpreheatersaftertheSCRdenitrificationdeviceisinstalled.Inthecasestudyofapowerplant,theanalysisoftheimpactsoftheSCRdenitricationdeviceontheairpreheaterisconductedandsomemeasuresagainstthecorrosionandcloggingareproposedaccordingly.Tocontrolthepressuredifferenceoftheairpreheaternolongerincreasing,theammoniaisstoppedsprayingintotheSCRdenitrificationdeviceduringlowloadoperationwhileitisreducedduringnormalloadoperation.Inaddition,theheatexchangepartoftheairpreheaterheaterischangedtoanenameledoneduringtheboilershutdown.Inmorethanayearofoperationsincethen,thepressuredifferencehasbeennormalandnosevereclogginghaseverhappened.Keywords:coalfiredpowerplant;fluegasdenitrafication;SCR;airpreheater;(6),;(7),NOx,;(8),,,,NH4HSO4。5600MW,,3000Pa,450MW。,,,;,SCR;,,。,,。,,2000Pa,1300~1600Pa。,SCR,。:[1].SCR[J].,2005,38(11):69-74.ZHAOZongrang.DesignoptimizationofSCRsystemforcoalfiredboilers[J].ElectricPower,2005,38(11):69-74.[2],.1000MWSCR[J].,2012,45(1):41-44.LIANGChuan,SHENYue.Optimaloperationofselectivecatalyticreduction(SCR)fluegasdenitrificationsystemin1000MWunit[J].ElectricPower,2012,45(1):41-44.[3],,,.[J].,2009,42(8):75-79.LIUKang,XIAOZhijun,TANXiaode,etal.Applicationforselectivecatalyticreductiontechnologyforfluegasdenitrification[J].ElectricPower,2009,42(8):75-79.[4],.[J].,2008,30(4):260-261.WANGLili,XUWeiguo.Effectoffluegasdenitrationplantonairpreheater[J].HeilongjiangElectricPower,2008,30(4):260-261.[5],,,.SCR[J].,2011,44(11):55-58.CAOZhiyong,TANChengjun,LIJianzhong,etal.Experimentofoptimizationadjustmentforammoniainjectionofselectivecatalyticreductionfluegasdenitrationsystemincoalfiredboiler[J].ElectricPower,2011,44(11):55-58.[6],.SCR[J].,2012,41(8):45-47.ZHONGLijin,SONGYubao.AirpreheaterblockinginboilerwithSCRdenitrificationdevicereasonanalysisandsolutions[J].ThermalPowerGeneration,2012,41(8):45-47.[7].NOx[J].,2013,46(1):86-89.WANGChunchang.EnergyconservationandenvironmentalprotectionstudyoncontrolofeconomicNOxconcentrationatSCRequipmentinlet[J].ElectricPower,2013,46(1):86-89.(责任编辑刘明)112