含氮氧化物废气的治理技术与发展

2008,5--:2008-04-14:(1979-),,,,,1,1,1,1,2(1.,310003,2.,310018):简单介绍了含氮氧化物废气的主要控制方法,重点描述了烟气脱硝技术及原理,包括选择性催化还原,选择性非催化还原,炽热碳还原法,电子束照射法,溶液吸收法等,并阐述了烟气脱硝技术的新进展,如微生物法,和光催化氧化法:废气;氮氧化物;治理方法;发展:X511:A:1004-3950(2008)05-0051-04ControltechnologyofNOxpollutionanddevelopmentLIYuyun1,JINXiangfu1,GAOQuanxi1,etal(1.HangzhouBestwaEnvironmentalTechnologyandEngineeringCo.,Ltd,Hangzhou310013,China;2.ZhejiangGongshangUniversity,Hangzhou310018,China)Abstract:SomemainNOxcontroltechnologieswereintroduced.Thepresentapplicationsituationandprincipleofdenitrificationtechnologies,suchasSCR,SNCR,fierycarbondeoxidization,electronbeam,themethodofabsorptionbysolution,andsoonwereintroducedindetai.lTheprincipleofsomenewNOxremovaltechnologiesdevelopedinrecentyearswerealsopresented,suchasphotocatalyticoxidationandbiologicaltreatment.Keywords:wastegas;NOx;treatingtechnologies;development(NOx),2070,NOx,,,,NOx,,12[1]:(1),NOx,2080,,200,NOx50%~55%,,(2),,NOx,NOx2NOx,NOx,[2]2.1干法2.1.1还原法,NOxN2:--(1)(SCR)(selectivecatalyticreduction,SCR),H2CONH3NOxN22080NOx[3]SCR[4],CO,PtRhPd,[5],350SO2,Sn0.5Ti0.5O2CONO100%,SO2+NO+COSCR[6],,NH3,;(2)(SNCR)(SelectiveNonCatalyticReduction,SNCR)[7],NOxN2,SCR,30%~50%NOx,,,SNCRNH3/NOxSNCRNOxNOx[7],870~1100;900~1150;0.001~10s,NOx,0.5s,0.5~3,,SCR,(3)NOx,,;NH3,,[8]NOx:C+2NOCO2+N2C+NOCO+1/2N2C+NO2CO2+1/2N2C+1/2NO2CO+1/4N2NOx,650~850,NOx,NOx,99%NO2350NOO2450~600,O2NO,O2O2,NOO2,[8]2.1.2电子束照射法(EBA)和脉冲电晕等离子体法(PPCP)[6],,,,,,(OHOHO2),NOx,NH4NO3,SO2NOx,,,NOx,TiO2Al2O3Al2O3,[9],2.1.3吸附法NOx,,NOx2008,5-!-,NOx[6],,[2]RubionaB[9]NO,,,,NO,2.1.4光催化氧化法TiO2NOx[10]:TiO2,,,,,NOx,!OHO-2,NOxNO-3,,TiO2NOx[11],NOx90%,NOx,,TiO2NOx,2.2湿法2.2.1液体吸收法(1)(,)()()[2](2)NOx,,,l~1.3,[2],,O2O3Cl2ClO2,HNO3KMNO4NaClO2NaClOH2O2KBrO3,K2Cr2O4,(NH4)2Cr2O7[8]BalRajDeshwal[12]ClO2100%NO60%NO2,pH[13],:7000~10000mg/m3,99%,99mg/m3;,3,,(3),N[2]2,NOx,,CO2,,,NO2,[14]:NH2CONH2+2HNO22N2∀+CO2∀+3H2O(4)NO,NONOx[8],NOxNO,NONOFeSO4Fe(#)EDTAFe(#)EDTANa2SO4[8][15],Fe(#)EDTA,NOx,,[16],,-∀-,,2.2.2生物法,,,(),;()NOx[17]NOxNO2NO,,NONO-2,NO-3,,,,CO2,,,,,:NO-3NO-2NON2ON2[18][19],NOx,,:,pH,NOx60%~85%3,NOx,,NOx,,,,,,,,,,,NOx,:[1],.[J].,2006,12(3):43-46.[2].[M].:,1992.[3],.(SCR)[J].,2004(2):24-27.[4].[M].:,2001.[5],,,.Sn0.5Ti0.5O2SO2NOCO[J].,2002,8(3):193-196.[6],.[J].,2007,23(3):24-27.[7],.[J].,2006,22(4):15-19.[8],,.(SCR)[J].,2005,31(1):25-28.[9],.[J].,2006,7(9):21-26.[10]RUBIOB,IZQVIERDOMT,MAYORALMC,etal.Unburntcarbonfromcoalflyashesasaprecursorofactivatedcarbonfornitricoxideremoval[J].JournalofHazardousMaterials,2007,143:561-566.[11]LIMTH,KIMSD.PhotocatalyticdecompositionofNObyTiO2particles[J].JournalofPhotochemistryandPhotobiologyA:Chemistry,2000,134:209-217.[12]DESHWALBR.RemovalofNOfromfluegasbyaqueouschlorinedioxidescrubbingsolutioninalabscalebubblingreactor[J].JournalofHazardousMaterials,2008,150:649-655.[13].[J].,2007(6):87-90.[14].[M].:,2001.[15]LONGXL.Nitricoxideabsorptionintocobaltethylenediaminesolution[J].parationandPurificationTechnology,2007,55:226-231.[16].[J].,2007,15(1):64-67.[17],.[J].,2005,20(3):69-74.[18]YANGWF,HSINGHJ.Theeffectsofelectedparametersonthenitricoxideremovalbybiofilter[J].JournalofHazardousMaterials,2007,148:653-659.[19],.NOx[J].,2003,21(2):37-39.