赤泥与矿井废水在烟气脱硝中的应用

35120171EnvironmentalEngineeringVol．35No．1Jan．2017*12211.2640052.264003。DN。50℃SO2DNSO2DN。DN48%。NaClO2DN70%。DOI10.13205/j．hjgc．201701020APPLICATIONOFTHEＲEDMUDANDMINEＲALWASTEWATEＲINFLUEGASDENITＲIFICATIONSUNXiang-yu12SHENGYan-qing2ZHANGPei-qing11.CollegeofChemistryandChemicalEngineeringYantaiUniversityYantai264005China2.YantaiInstituteofCoastalZoneＲesearchChineseAcademyofScienceYantai264003ChinaAbstractInthisstudynewabsorptionliquidbasedonwetfluegasdesulphurizationprocesswasmadebycombiningredmudandminewastewatertoachievethesimultaneousdesulfurizationanddenitration．Themainfactorsandoxideabsorbers’influenceondenitrationDNefficiencywithinthebubblingreactorwasstudied．Theresultsshowedthatthetemperatureexceeding50℃wasnotbeneficialforthedenitrationandtheactivityofabsorptionliquidwascomparativelyhigherunderacidicoralkalinecondition．LowconcentrationofSO2couldpromotedenitrationwhileexcessiveSO2wouldleadtotheinhibitioneffect．Inoptimalconditionsthedenitrationefficiencyremained48%．BesidestheresultsshowedthatNaClO2wasanexcellentoxidantandsorbentbywhichthedenitrationefficiencycouldbeupto70%．Keywordsfluegasdenitrationredmudminewastewaterusingwastetotreatwaste*413731002013kjhm060308。2016－02－180NOx。NOx12020NOx2900t2。NOx。2011GB13223—2011《》NOx100mg/m33。2015NOx4NOx。。SCＲ80%3563、7。SNCＲ68。。353000t。9-10。11-13。20%14。15。16。DN。。11.11。、NO、N2、SO2ECOM-CNrbr。。。5min1。1—2—NO3—N24—SO25—6—7—8—9—10—pH11—。1Fig．1TheprocessofexperimentalapparatusNO4%～7%NO5%～10%17。1—2DN=CinNOx－CoutNOxCinNOx×100%1DS=CinSO2－CoutSO2CinSO2×100%2Cinmg/m3Coutmg/m3。1.21L934NOx3DN。2DN。3、pH、SO2DN。4DN。22.1L934ABNOxCDA1=8%A2=10%A3=12%B1=0.4L/minB2=0.6L/minB3=0.8L/minC1=400mg/m3C2=600mg/m3C3=800mg/m3。1。1Table1TheresultoforthogonalexperimentsA/%B/L·min－1C/mg·m－3DDN180.4400139.1280.6600246.0380.8800337.84100.6800148.05100.8400234.46100.4600346.77120.8600136.08120.4800252.59120.6400339.9k1j122.9138.3113.4123.1k2j129.1133.9128.7132.9k3j128.4108.2138.3124.4Ｒj6.230.124.99.81k1j、k2j、k3jDNＲjDN。＞NOx＞A2B1C3。B2491DNB1B2。A2B2C34DN48%。2.210%0.6L/minNOx800mg/m3。2.2.1DNDN2。2DNFig．2TheeffectofredmudconcentrationonDN2DN12%。。10%～12%。2.2.2DNDN3。3DNFig．3TheeffectofgasflowrateonDN3DN。DN0.6L/min。DNNOx。DN13。0.6L/min。2.2.3NOxDNNOxNOxDN4。4NOxDNFig．4TheeffectofNOxconcentrationsonDN4NOx400mg/m3800mg/m3DN40.8%48%NOx800mg/m3DN。NOxNOx18NOxNOx。DN。NOx500～1000mg/m319。2.3、pHDNDSDN。2.3.1DNDN5。59355DNFig．5TheeffectofreactiontemperatureonDN540℃DN。NOxNOxNOx。NOxΔH19。DN。40℃。。。2.3.2pHDNpHpHDN6。6pHDNFig．6TheeffectofinitialpHvaluesonDN6pHDNpH5～6pH8。pH＜5。pH5～6CaCO321。。pH5.8～6.220。pH。2.3.3DNDSSO2NOx。NOxSO2SO2DNSO2NOxNOxDS2。2DSDNTable2ＲelationshipbetweenDSandDNSO2DNNOxDSCSO2/mg·m－3DN/%CNOx/mg·m－3DS045.2098.8100046.040098.8150045.060099.0200042.480099.02NOx0400600800mg/m3DSNOxSO2。SO2DN。SO21000mg/m3DN0.8%SO2SO2－3HSO－3NOx22NOx。SO22000mg/m3DN2.8%NO2SO2SO2NOx23。2.4DN、KMnO4、H2O2NaClO27。7KMnO4NaClO2DN1%73.1%70.0%KMnO4NaClO2NOxNO－2NO－3691—■—KMnO4—●—H2O2—▲—HNO3——NaClO2。7DNFig．7TheeffectofdifferentadditivesandtheirconcentrationonDNNODN23。H2O2DNH2O2NO－3NOx。HNO3DN。DNKMnO4NaClO2KMnO4NaClO2。31NOx48%。400mg/m340%0.6L/minDNNOx。240℃NOx40℃。NOxNOx。SO2NOxSO2NOx。3KMnO4NaClO2NOx1%27.5%22%H2O2NOxHNO3NOx。NaClO2。1．J．201544102371-2373.2．J．2010382916388-16391.3．J．20123992084-2092.4．J．201544102431-2434.5．SCＲJ．2010396921-92428.6．J．200723320-23.7．J．2013331418-3113.8．J．2012313106-110.9ZhaoYYueQLiQetal．CharacterizationofredmudgranularadsorbentＲMGAanditsperformanceonphosphateremovalfromaqueoussolutionJ．ChemicalEngineeringJournal2012193/194161-168.10ZhouHLLiDYTianYJetal．ExtractionofscandiumfromredmudbymodifiedactivatedcarbonandkineticsstudyJ．ＲareMetals2008273223-227.11UysalBZAksahinIYucelH．SorptionofSO2onmetal-oxidesinafluidized-bedJ．IndEngChemＲes1988273434-439.12．J．．2010317986-989.13．J．．．201334334-37.14．J．2010381117-2252.15．J．200811-47.16．J．201534101-3.17．/J．20114512123-128.18．NaClO2J．20052124-6.19．NaClO2J．20123861-5.20．－J．2009296580-584.21．J．20126113981-3987.22ZhengCXuCZhangYetal．Nitrogenoxideabsorptionandnitrite/nitrateformationinlimestoneslurryforWFGDsystemJ．AppliedEnergy2014129187-194.23．J．20113161175-1180．1990－。[e-mail]1975－。[e-mail]79