设计论文

1摘要：根据毕业设计任务书提供的城市生活污水的水质资料和处理水要达到一级排放标准的要求，本文比较了氧化沟工艺和普通活性污泥法的特点，选择了三沟式氧化沟工艺作为污水处理的核心工艺，进行污水处理厂的初步设计。本文设计计算了主要的污水处理和污泥处理的构筑物，包括格栅池、曝气沉砂池、三沟式氧化沟、幅流式二沉池、气浮式浓缩池、厌氧消化池等，并根据计算结果选配了部分机械设备，如XWB—Ⅲ型格栅除污机、YHG型水平轴转刷曝气机等，还设置了办公楼、化验楼、仓库、机修间等附属设施。并根据污水处理厂的布置原则和要求，进行了污水厂的平面布置和高程布置。最后，对污泥的最终处置和污水处理厂的发展等问题进行了初步的探讨。关键词：污水处理三沟式氧化沟污泥处置Abstract:Accordingtograduatingthewaterqualitymaterialsofurbansanitarysewagethatdesignspecificationsofferanddealingwithwatertomeettherequirementoffirstclassdischargestandard,thistexthasrelativelyoxidizedthecharacteristicsofthecraftoftheditchandtraditionalactivemudlaw,havechosenthreeditchtypestooxidizethekeycraftassewagedisposalofthecraftoftheditch,carryonthepreliminarydesignofthesewagetreatmentplant.Thistexthasdesignedandcalculatedthestructuresdealtwithinmainsewagedisposalandmud,includinggridpool,exposetothesunbeingtheangrynotsinkingtherearen'tsandthepools,threeditch,andaccordingtoresultofcalculationpolygamysomemechanicalequipment,forinstanceXWB-Model¢ógridgetridofdirtymachine,YHGtypehorizontalaxleisitisitexposetothesunangryplane,etc.tobrushtotransferto,havealsosetupsuchaffiliatedfacilitiesastheofficebuilding,testingthebuilding,warehouse,machineryroom,etc.Accordingtodecorateprincipleanddemandsewagetreatmentplant,carryonlevel,sewageoffactoryassignwithhighChengassigning.Finally,carriedonthepreliminarydiscussiontohandlingsuchproblemsasthedevelopmentwiththesewagetreatmentplant,etc.finallyofsludge.Keywords:watertreatmentoxidationditchsludgedisposal1目录前言:.......................................................................11．工艺设计说明.............................................................11.1．污水处理的工艺说明.....................................................11.1.1．氧化沟工艺的原理.....................................................11.1.2．氧化沟工艺与普通活性污泥法的比较.....................................21.1.3．污水处理工艺流程.....................................................31.2．污泥处理与污泥处置.....................................................31.2.1．污泥处理工艺的选择...................................................31.2.2．污泥的处置...........................................................41.3．构筑物及设备...........................................................41.3.1．主要处理构筑物.......................................................41.3.2．其他构筑物和机械设备.................................................41.3.3．辅助建筑及设备.......................................................42．工艺设计的计算说明.......................................................52.1.污水处理深度...........................................................52.2.细格栅的设计...........................................................62.3．曝气沉砂池的设计.......................................................82.3.1．设计参数的选取.......................................................82.3.3．鼓风机的选择.........................................................92.4．三沟式氧化沟的设计.....................................................92.4.1．设计参数的选取.......................................................92.4.2．三沟式氧化沟的计算说明..............................................102.5.向心流辐流式二沉池的设计..............................................152.5.1.设计参数的选取......................................................152.5.2.设计计算说明........................................................152.6．气浮式浓缩池的设计....................................................182.6.1．设计参数的选取......................................................182.6.2．气浮式浓缩池的设计..................................................192.7．消化池的设计..........................................................202.7.1．设计参数的选取......................................................202.7.2．设计计算说明........................................................213．其他构筑物和机械设备的选择..............................................263.1．污水提升泵站与水泵....................................................263.2．接触池与加氯设备......................................................263.3．计量槽................................................................273.4．带式压滤机械..........................................................274．附属建筑及设备..........................................................284.1．辅助建筑..............................................................284.2．化验及维修设备........................................................285．污水厂的总体布置........................................................285.1．平面布置..............................................................285.2．高程布置..............................................................2826．问题与讨论..............................................................286.1污泥的处理和处置的现状.................................................286.2污水处理的可持续.......................................................29主要参考文献...............................................................30结论.......................................................................31感谢.......................................................................32附录.......................................................................331前言:据统计，现在长江流域的工业废水和城市污水每年排放量已高达250多亿吨，90％未经处理直接排入江中，危及沿江500多个城市的饮用水。同时由地表径流，船舶，生活垃圾，工业废物引起的污染问题也十分严重。在多数城市及主要江段存在不同的岸边水质污染带问题。而在江苏，淡水资源十分