wwwcnkinet燃煤电站锅炉烟气脱硝改造及运行分析

2018(4)2018-09-21(2016GGJS-038)(MTKJ2015-259)(J2016-1)(B2011-089)(1985—)。(1979—)。7NOx、SCR、、、。360℃0.9~1.01.2SCR90%NOx45mg/Nm3250~280℃。SCRO641.12A1005-7676(2018)04-0024-04RetrofitandOperationAnalysisofCoal-firedFlueGasDenitrationinPowerPlantLIUXiaohui1,ZHANGQiaosheng1,CHENGuoyan1,ZHANGAnchao1,SHIJinming2,ZHOUPuyang1,WANGYichao1(1.SchoolofMechanicalandPowerEngineering,HenanPolytechnicUniversity,Jiaozuo454000,China;2.InstituteofEnergyofJiangxiAcademyofSciences,Nanchang330096,China)Abstract:Torealizeultra-lowemission,coal-firedfluegasdenitrationofsevenpowerplantwasreformed.ThemixtureoflowNOxcombustiontechnologyandpost-furnaceselectivecatalyticreductiontechnologywasutilizedforthedenitrationsystem,inwhichthecombustorofpulverizedcoalboiler,SCRdenitrationsystem,andinducedfanweredesignedandmodifiedaccordingly.Moreover,theeffectofexcessaircoefficient,thereactortemperatureandammonia-nitrogenmoleratioondenitrationefficiencywasinvestigated.Theexperimentalresultsshowedthatwhenthetemperaturewascontrolledatabout360℃,theexcessaircoefficientwasbetween0.9-1.0,theammonia-nitrogenratiowasabout1.2,thecomprehensivedenitrationefficiencyoftheSCRsystemofpowerplantcouldreachmorethan90%,andtheNOxconcentrationinfluegasoutletwasbelow45mg/Nm3andtheoutlettemperatureoffluegasofabout250-280℃,inlinewithenvironmentalprotectiondepartmentemissiontargets.Keywords:fluegasdenitration;retrofit;SCR;efficiency1111211(1.4540002.330096)DOI10.16056/j.1005-7676.2018.04.00724··2018(4)2014SO21974tNOx2078t[1]。NOx、NOx[2-3]。2030NOx3540t。《》[4]SO235mg/m3、NOx50mg/m3、5mg/m3。。173(1#~3#)150t/h、2(4#、5#)220t/h2(6#、7#)240t/h。36MW、112MW、225MW125MW。/771370t/h105MW。7。、1。2“NOx”“(SCR)”。、(BMCR)NOx≤540mg/Nm3SCRNOx580mg/Nm3NOx≤45mg/Nm3≥90%。1#~7#5SCR(52+1)、。2.1NOx()、、NOx。1/t·h-1/m3·h-1/℃/t·h-11#～3#TCZ150/3.82-1150—139.217.064#、5#NG-220/9.8-M22220—14026.236#WGZ-240/9.8-324048000014028.67#WDLZ-240/9.8-1240560000135.828.6NOx/(mg·Nm-3)/(m3·h-1)/kPa/m2/%1#～3#1970004.8400613599.6≤100—Φ8.2m≤1002467804#、5#2600004.8560615099.6≤100576Φ8.4m≤1001247806#2800005.5630616099.6≤1001352Φ8.6m≤10015311007#2800004.5560616099.6≤10013521100/kW/kV/(mg·Nm-3)/(mg·Nm-3)SO225··2018(4)1NOx/%1.2201.00.80.61.43040506070102.5kPa。(1#~3#197000m3/h4#~5#260000m3/h6#~7#280000m3/h1#~5#4.8kPa7.2kPa6#~7#4.5kPa7.0kPa。3SCRNOxNOx、SCR、SCR1~4。1NOx1.460%。2SCRSCR365℃。3380℃5×10-6。4。、、CO。NOx、NOx、、NOx。NOx50%~70%NOx≤45mg/Nm3。2.2SCR500℃NOx、、NOxN2H2O[5-6]。4NO+4NH3+O2→4N2+6H2O(1)4NH3+2NO2+O2→3N2+6H2O(2)4NH3+6NO→5N2+6H2O(3)4NH3+4NO+3O2→4N2O+6H2O(4)3#~7#SCR。11SCR2+1SCR。SCR2。SCR24000h10。2。2.3。SCR2SCR/(t·h-1)/(g·Nm-3)NOx/(mg·Nm-3)/(mg·m-3)/(kg·h-1)SO2/SO3/%/℃/PaSCR/%SCRSCR1#～3#15030780430≤100≤332.11.0300～420≤1200≥76.754#、5#22078043050.0≥76.756#240110058053.5≥83.57#240110058053.5≥83.526··2018(4)360℃0.9~1.01.2SCR90%NOx45mg/Nm36%~8%SO215mg/Nm3250~280℃。4NOxSCRNOx50mg/Nm320mg/Nm3。NOx10262t/a1109t/aNOx9153t。1685t/a222t/a1463t。0.6NOx0.952.18。618.35。5。。NOx。SCRSCR。380℃5×10-6。。NOxSCR90%NOx45mg/Nm3。[1].IPCC20202050SO2、NOx[D].:,2017.[2].NO[D].:,2012.[3],,,.[J].,2008(12):2470-2479.[4],.:GB13271—2014[S].:,2014.[5].[M].:,2013.[6]KoebelM,ElsenerM.SelectivecatalyticreductionofNOovercommercialDeNOx-catalysts:experimentaldeterminationofkineticandthermodynamicparameters[J].ChemicalEnginee-ringScience,1998,53(4):657-669.2SCR/%SCR/℃3608534032030038087868889904003/10-61.00200.950.900.851.05304050060101.10380℃350℃330℃300℃280℃41.10.90.80.71.20.61.3370℃350℃330℃310℃290℃1.00.70.80.91.00.527··