柴油机排气后处理技术介绍_(培训)

¾¾¾¾¾¾¾¾¾¾¾¾¾¾¾zzzz¾HCCONOxPM¾HCCONOxNOx¾NOxPMDPF¾615%NOx¾¾¾¾¾¾12345543210.040.080.120.160.20EU3(2000)0.160.120.080.04NOx[g/(kW·h)]EU5(2008)PM[g/(kW·h)]EU4(2005)US2004US2007US2010JP2003JP2005JP2008(200)(20)(20)g/(kWh)50%0%80%33%58%--PM下降百分比80%43%30%29%13%--NOx下降百分比0.010.020.020.100.150.36颗粒物排放(PM)0.423.5578氮氧化物(NOx)2014年2009年2006年2001年1996年1993年实施时间欧欧欧欧欧欧排放标准¾……¾†Massdesignations(inmetrictons)are“maximumtechnicallypermissiblemass”*kmoryearperiod,whicheveristhesooner700000km/7years500000km/7yearsN316tonM3ClassIII,andClassB7.5ton300000km/6years200000km/6yearsN2N316tonM3ClassI,ClassII,ClassA,andClassB7.5ton160000km/5years100000km/5yearsN1andM2EuroVIEuroIV-VPeriod*VehicleCategory†Table3EmissionDurabilityPeriodsEuroVIRegulation.AdditionalprovisionsoftheEuroVIregulationinclude:zAnammonia(NH3)concentrationlimitof10ppmappliestodiesel(ESC+ETC)andgas(ETC)engines.NH310ppmzAparticlenumberlimit,inadditiontothemasslimit,istobeintroducedintheimplementingregulation.ThenumberlimitwouldpreventthepossibilitythattheEuroVIPMmasslimitismetusingtechnologies(suchas“openfilters”)thatwouldenableahighnumberofultrafineparticlestopass.zTheworld-harmonizedtestcycles—WHSCandWHTC—willbeusedforEuroVItesting.WHSC/WHTCbasedlimitvalueswillbeintroducedbytheimplementingregulationbasedoncorrelationfactorswiththecurrentESC/ETCtests.WHSCandWHTCESC/ETCzAmaximumlimitfortheNO2componentofNOxemissionsmaybedefinedintheimplementingregulation.NOxNO2••NOxPM•0.022.00.461.520120.023.50.461.520100.105.00.662.12007PMNOxHCCO0.032.00.554.020120.033.50.554.020100.165.00.785.452007PMNOxHCCO1ESCg/(kW·h)2ETCg/(kW·h)¾¾¾¾¾¾••¾¾FromSAE2003-01-3244‹‹„+EGR+DPF„+EGR+DPF„++SCR0.100.080.060.040.02002.04.06.08.010.0NOx-g/(kW·h)PM-g/(kW·h)EU3EU4EU5EU6WithEGRWithoutEGR•••:C+2NO2ÆCO2+2NO200-550C+O2ÆCO2550FromJohnsonMatthey-NONO2:2NO+O2Æ2NO2•••••:„„PMPMNONO22„„HCHCPMPMCOCO„„(ESC&ETC):(ESC&ETC):::ηηPMPM≈≈50%,50%,::ηηPMPM≈≈70%70%::ηηHCHC≈≈85%85%::ηηCOCO≈≈90%90%16FromSAE2003-01-3244:EmitecGmbHandMANPorousSection•~)••FromSAE2003-01-3248¾¾¾¾¾¾¾DOCDieselOxidationCatalyst¾DPFDieselParticulateFilter.¾PDPFPartialFlowFilter/flowthroughfilter/openfilter.//,-POCParticulateOxidationCatalyst-PFF/PM-KAT”CAT”catalyzedPFF…-PMMetalitEmitec-….¾PFFSystemDOC+PFFPFFPOC&DPF•POCSystem-Opensystem-Bypassoffilterlayerpossible•DPFSystem-Closedsystem-ExhaustflowthroughfilterwallDPFDOC+PFFPMSulfatePMDOCDOC¾10ppm¾DOCPM¾—¾¾¾¾¾¾SCRSCRSCROBDCAESCR¾¾¾¾SCR¾¾¾¾SCR¾…………CANEDC17DeNOx2.2NOx™™™™™™™™DCU99999991.INLET2.BACKFLOWOUTLET3.OUTLET4.5.6.7.8.12346578º¾¾SCR300mm¾¾————315~45—85~275—45~85275~31534.1¾¾¾4.2¾¾44.2¾‹‹¾3~5R=200mm3R=150mm5¾5~10mm7.5mm35mm¾—3099mm—73~5™™™™™™™™™µµ™200~20k-40~100ECU1.27k™™™™™™™9.5mm8mm1SAEJ20449.5mm3/8in8mm5/16in8mm6mm2SAEJ20448mm5/16in8mm6mm2SAEJ20449.5mm3/8in8mm6mm()3™™™™™5(a)()(b)()WP7/WP5WP10/12SCR16.53%16.49%16.78%17.11%16.54%16.55%(c)3CAT-1CAT-3CAT-5CAT-6CAT-2CAT-4CFD10.0%5.5%6.0%Mmean8.1%6.7%6.7%Mmax321™™™™™¾™™¾™¾™8DeNOx2.29DeNOx2.2WP12WP12SCR„„——WP5E4„„——WP7E4„——WP10E4„——WP12E4¾¾¾¾¾¾SCREGR+DPF5~7%99999