给排水毕业设计

兰州交通大学毕业设计(论文)I摘要内容摘要：本设计内容为西宁市城市污水回用处理工程设计，其处理对象主要为生活污水和工业废水，要求城市污水经处理后，60%就近排入水体。达到《污水处理厂出水水质参考《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级B标准。城市污水经处理后，40%经处理工艺处理后的，作为回用水。夏季主导风向为西南风，进水BOD为300mg/L，SS为340mg/L。根据进水水质分析，以及出水要求，污水水质BOD/COD=0.73，可见原污水可生化性良好。因此，经过几种方案的比较，最终选择以卡鲁塞尔氧化沟为核心的处理工艺，本设计的工艺流程为：进水→粗格栅→污水提升泵站→细格栅→平流式沉砂池→厌氧池→卡鲁塞尔氧化沟→辐流式沉淀池→紫外线消毒→配水井→溶气气浮池→普通快滤池池→接触池→回用水池。主要构筑物有水泵5台，卡鲁塞尔氧化沟4座，辐流式二沉池4座，紫外线消毒渠1座，气浮池2座，普通快滤池4座，接触池2座，中水池1座。污泥部分处理流程为：污水回流泵房→浓缩池→污泥脱水→泥饼外运，主要构筑物包括2座浓缩池，1座脱水机房文本部分包括：设计说明书、设计计算书、结束语、致谢、参考文献；图纸包括：污水厂平面布置图、污水厂高程布置图、污水提升泵站布置图、平流式沉砂池工艺图、卡鲁塞尔氧化沟工艺图、辐流式二沉池工艺图、污泥浓缩池、接触池工艺图。本设计的要点是将原污水经过中格栅间，由污水泵站提升，经过平流式沉砂池的一级处理，再经过厌氧池及氧化沟，经二沉池达到泥水分离，再经过紫外线消毒，一部分水达到二级排放标准直接排放，另一部分经气浮池，普通快滤池过滤及接触池消毒，进入回用水池以再次利用，。本设计的优点就是利用氧化沟工艺，不设初沉池和污泥消化池，是工艺流程简单，便以操作和运行，对于水质的处理的效果好。关键词：城市污水处理，卡罗塞尔氧化沟，污泥浓缩，中水回用AbstractSummary:ThisdesigncontentXiningcitywastewaterreusetreatmentengineeringdesign,mainlyforitshandlingofdomesticsewageandindustrialwastewater,urbansewageaftertreatmentrequirements,60percentdischargedintonearbywaterbodies.Achievesewagetreatmentplanteffluentqualityreferenceurbansewagetreatmentplantpollutantdischargestandards(GB18918-2002)inaB兰州交通大学毕业设计(论文)IIstandard.Urbansewageaftertreatment,40%ofthetreatedprocesstreatedasreusewater.DominantwinddirectionissouthwestsummerinfluentBODof300mg/L,SSof340mg/L.Accordingtowaterqualityanalysis,andwaterrequirements,wastewaterqualityBOD/COD=0.73,showsthattheoriginalwastewaterbiodegradabilityisgood.Therefore,aftercomparingseveraloptions,chosetoCarrouseloxidationditchtreatmentprocessasthecore,Thedesignoftheprocess:water→coarsegridsewagepumpstations→advectionfinegridanaerobicpondgritchamber→Carrouseloxidationditchradialflowsedimentationtank→withultravioletdisinfectionWelldissolvedairflotationtank→contactwithordinaryrapidfilterpoolpoolpool→reuse.Therearefivemajorstructurespumps,Carrouseloxidationditch4,radialflowsecondarysedimentationtank4,ultravioletdisinfectiondrainage1,flotationtank2,thegeneralrapidfilter4,contacttank2,inthepool1.Partiallytreatedsludgeprocess:sewagepumpingstationrefluxconcentratetank→sludgedewateringsludgecakeSinotrans,themainstructuresincludetwoconcentratedpool,adewateringroomTextsectionincludes:designspecification,designcalculations,Conclusion,Acknowledgements,References;Drawingsinclude:wastewatertreatmentplantfloorplan,elevationlayoutsewageplant,sewagepumpingstationlayout,advectionprocessdiagramgritchamber,Carrouseloxidationditchprocessdiagram,radialflowprocessdiagramsecondarysettlingtank,sludgeconcentrationtank,contacttankprocessdiagram.Thepointisthattheoriginaldesignofthewastewaterthroughthegrillefromthesewagepumpingstationupgrade,throughadvectiongritchamberofadeal,andthenaftertheanaerobictankandoxidationditch,reachedbysecondarysedimentationtankwaterseparation,andthenafterultravioletdisinfection,partofthewaterdischargestandardstoachievetwodirectemissions,partlythroughtheflotationtank,ordinaryrapidfilterfiltrationanddisinfectioncontacttankintothepoolinordertore-usereuse.Theadvantageofthisdesignistheuseofoxidationditchprocess,withnoprimarysettlingtankandsludgedigestiontankisasimpleprocess,thentooperateandrunforthewatertreatmenteffect.Keywords:urbansewagetreatment，carrouseloxidationditch，SludgeThickening，waterreuse兰州交通大学毕业设计(论文)III目录1.设计概述及设计原则........................................................................................11.1.1设计题目..............................................................................................11.1.2设计资料..............................................................................................11.1.3设计依据..............................................................................................21.1.4进度安排..............................................................................................21.1.5设计成果要求......................................................................................31.2设计原则.....................................................................................................31.2.1污水处理厂厂址的选择......................................................................31.2.2工艺流程选择的原则..........................................................................41.2.3污水厂的平面布置原则......................................................................51.2.4污水厂的高程布置原则......................................................................62.设计方案的比选.................................................................................................72.1污水水质及处理程度的计算.....................................................................72.1.1进水水质..............................................................................................72.2工艺流程比选.........................................................................................82.3工艺流程的确定...................................................................................112.4污水处理构筑物的选择...........................................................................132.4.1格栅...................................................................................................132.4.2进水闸井.....