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壁流式微粒捕集器连续再生特性研究.docx

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壁流式微粒捕集器连续再生特性研究 摘要 本论文研究了壁流式微粒捕集器的连续再生特性，通过理论分析和实验研究，总结出壁流式微粒捕集器的最佳再生条件以及再生效果的影响因素。结果表明，合适的再生温度、空气流量和再生时间可以有效地提高微粒捕集器的再生效率和捕集性能。 关键词：壁流式微粒捕集器，连续再生，再生效率，捕集性能 Abstract Thispaperstudiesthecontinuousregenerationcharacteristicsofwall-flowparticletraps,andsummarizestheoptimalregenerationconditionsandthefactorsaffectingtheregenerationeffectthroughtheoreticalanalysisandexperimentalresearch.Theresultsshowthatsuitableregenerationtemperature,airflowrate,andregenerationtimecaneffectivelyimprovetheregenerationefficiencyandtrappingperformanceoftheparticlecollector. Keywords:wall-flowparticletrap,continuousregeneration,regenerationefficiency,trappingperformance Introduction Asenvironmentalpollutionbecomesmoreandmoreserious,thereductionofexhaustemissionsfromdieselengineshasbecomeanurgentissue.Thedevelopmentofdieselparticulatefilters(DPFs)hasbecomeoneofthemosteffectivemethodsforcontrollingdieselexhaustparticulatematter(PM)emissions.Amongvarioustypesoffilters,wall-flowfiltershavegainedincreasingattentionduetotheirhighPMremovalefficiencyandlowpressuredrop.However,theaccumulationofPMinthefilterchannelscanleadtocloggingandasignificantincreaseinthepressuredrop.TheperiodicremovaloftheaccumulatedPMisessentialfortheefficientoperationofthewall-flowfilter,andthisisachievedbyaregenerationprocess. In-wallflowfilters,aneffectiveregenerationprocessiscrucialformaintainingtheirhighfiltrationefficiencyandlowpressuredrop.Continuousregeneration,whichoccursduringnormalengineoperation,canavoidtheperiodicremovalofaccumulatedPMandimprovethefilter'sreliabilityundervariousengineloadsandoperatingconditions.Therefore,thisstudyaimstoinvestigatethecontinuousregenerationcharacteristicsofwall-flowfiltersandexploretheinfluenceofregenerationconditionsonthefilteringperformance. TheoreticalAnalysis TheremovalofPMfromthefilterchannelsisrealizedbyaprocesscalledfiltration.Duringfiltration,thePMistrappedinthefilterchannelsthroughacombinationofvarioustrappingmechanismssuchasinterception,impaction,anddiffusion.AsthePMaccu