粉末活性炭在原水输水渠道中输移的模拟研究
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2020-03-10 11:23:19
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A辑第29卷第6期2014年11月水动力学研究与进展CHINESEJOURNALOFHYDRODYNAMICSVo1.29,No.6Nov.,2014DOI:10.3969~.issnl000-4874.2014.06.014粉末活性炭在原水输水渠道中输移的模拟研究术尹海龙,(1.同济大学环境科学与工程学院,上海李新建200092,Email:yinhailong@tongji.edu.cn)摘要t在原水输水管渠中投加粉末活性炭,对污染原水进行预处理,已经成为水源地突发污染事故条件下的应急处理技术手段。该文提出了粉炭在原水渠道中输移的数学模型及其解析解,并采用环形水槽试验手段确定了粉炭的动态沉降参数;以上海市黄浦江上游的原水输水管渠(>40km)为研究对象,模拟了不同水流条件下竹炭沿输水渠道的浓度分布,确定了满足粉炭吸附效能的临界水流条件。研究结果表明:①竹炭动态沉降与水流条件有关,与粉炭起始投加浓度(<30mg/L)无关;②竹炭沉降的临界水流剪切力为0.35Pa,最大沉降速率为6.2x1Om/s;③研究对象中临界水流条件为日供水量达到峰值水量的40%以上。该研究建立的相关数学模型和物理模型试验方法,对基于原水输水渠道突发污染事故条件下城市应急供水方案论证,具有借鉴意义。关键词:粉末活性炭;原水输水管渠;输移;沉降;临界水流条件中圈分类号:TV142.1;X507文献标识码:AModelingofpowderedactivatedcarbontransportinrawwateraqueductYINHai—long,LIXin-jian(1.SchoolofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China)Abstract:Powderedactivatedcarbon(PAC)hasprovedtobeawidelyusedmaterialfortheremovalofwaterpollutants.Inrecentyears,toensureci够’Sdrinkingwatersupplyunderpotentialsuddenwatersourcepollution,PACinjectionintolawwateraqueducttoutilizeprolongedPACcontacttimeinwater,isfocused.ThispaperpresentsamathematicalmodelanditsanalyticalsolutionforPACtransportinrawwateraqueduct,andthemodelingparameter(i.e.,dynamicPACdepostionrate)isascertainedusingrotatingcircularflumeexperiment.Thedevelopedmodelisappliedintosimulatingbamboolcharcoalconcentrationalong收稿日期:2014—09-24(2014—11-05修改藕)基金项目:国家自然科学基金项目fl1102137)作者简介:尹海龙(1976一),男,山东烟台人,博士,副教授.Received:September24,2014(RefisedNovember5,2014)Projeetsupportedbyfoundation:SupportedbytheNationNaturalScienceFoundationofChina(11102137)Biography:YINHai-long(1976-),Male,Ph.D.,AssociateProfessor.734水动力学研究与进展A辑2014年第6期thewateraqueductinoneofthedrinkingwatersupplyaqueductforShanghai,linkingsourcesintheHuangpuRiverwithmunicipaldrinkingwatertreatmentplants,andthereforethecriticalwaterflowingpatterntoobtainPACeficiencyisprovided.Itisconcludedthat:1)dynamicPACdepositiondependsonflowingpa~ern,butirrelevanttoinitialPACdose(1essthan30mg/Lusually);2、themaximumbamboocharcoaldepositionrateis6.2x104m/sunderstillwate
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