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1、第35卷第11期同济大学学报(自然科学版)Vol.35No.112007年11月JOURNALOFTONGJIUNIVERSITY(NATURALSCIENCE)Nov.2007城市生活垃圾焚烧飞灰的工程性质表征何品晶,刘星,冯军会,章骅(同济大学污染控制与资源化研究国家重点实验室,上海200092)摘要:分析测定了城市生活垃圾焚烧飞灰与收集、运输和处置相关的工程性质.测定结果表明,飞灰具有含水率低33-3-5-4(0.08%~1.15%)、堆积密度小(0.646@10~0.776@10kg#m)、渗透能力强(8.71@10~1.16@10cm#-1s)、易吸水等特点;飞灰粒径均
2、值为79Lm,d50为56Lm,其中38.5~74Lm粒径段飞灰约占总量的50%;在含水率<25%时,飞灰含水率越高,流动性越差,含水率>25%时,含水率越低,流动性越差;含水率为20%时,飞灰的压缩系数达到最小值,承载力最大,与击实曲线中含水率20%时干密度最大的结果一致;飞灰加水后孔隙率减小,但-1中孔比例增加,与水接触过程中,放热效应较强烈,24h累积放热量可达到51J#g;从填埋作业角度分析,飞灰含水率宜控制在20%,同时,要注意飞灰与水接触时的热效应.关键词:生活垃圾焚烧;飞灰;工程性质;含水率中图分类号:X502文献标识码:A文章编号:0253-374X(2007)1
3、1-1502-05EngineeringCharacteristicsofAirPollutionControlResiduesfromMunicipalSolidWasteIncinerationPlantHEPinjing,LIUXing,FENGJunhui,ZHANGHua(StateKeyLaboratoryofPolutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China)Abstract:Thispaperpresentsastudyoftheengineeringcharacteristi
4、csofairpollutioncontrol(APC)residuesfromamunicipalsolidwasteincinerationplantinShanghai.TheresultsshowthattheAPC33residuesareoflowerwatercontent(0.08%~1.15%)andbulkdensity(0.646@10~0.776@10-3-5-4-1kg#m),higherhydraulicconductivity(8.71@10~1.16@10cm#s)andwaterabsorption.Theiraverageparticlesiz
5、eis79Lm,d50is56Lm,whileparticlesof38.5~74Lmsizeaccountforabout50%oftheashbyweight.TheAPCresiduesbecomelessfluidwiththeincreasingofwatercon-tent(lessthan25%)butturnintomorefluidmaterialwiththeincreasingofwatercontentwhichismorethan25%.Thecompactingfactoranddrydensityreachtheminimumandmaximumva
6、luere-spectivelywhenitswatercontentis20%,whichmeansthatithasthemaximumbearcapacity.WhenwaterisaddedtotheAPCresidues,thetotalairspaceporositydecreasesandexothermicreactionsoc--1cur.Theaccumulativequantityofproducedheatamountsto51J#gin24h.ThewatercontentofAPCresidueswhichisuseforlandfillingisbe
7、ttertobecontrolledat20%,anditsexothermiccharac-tershouldbepaidmoreattentionto.Keywords:municipalsolidwasteincineration;airpollutioncontrolresidues;engineeringcharacteris-tics;watercontent收稿日期:2006-02-27基金项目:建设部科技攻关基金资助项目(03-2-051);上海市科学技术委员会重
