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[优秀毕业设计精品] 焦作市温县县城给水工程初步设计.doc

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[优秀毕业设计精品] 焦作市温县县城给水工程初步设计.doc

XXX毕业设计第1页共43页焦作市温县县城给水工程初步设计摘要地上式溶解氧法除铁除、锰工艺流程,有几种形式。选用什么样的流程主要取决于原水的化学成分,如水的碱性铁和锰的含量。当水中碱度大于2.0mg/l铁小于2.0mg/l锰小于1.5mg/l时可采用简单曝气一级过滤法处理,达到除铁、除锰的目的。当水中铁的含量大于5mg/l锰大于1.5mg/l时一般采用二级过滤工艺,一级过滤先除铁,二级过滤再除锰原因是当铁和锰同时存在于水中时,铁能干扰锰的去除,特别是铁和锰的含量较高时,除锰就更困难。必须采用曝气→一级过滤→二次曝气→二次过滤工艺流程,方能将水中的铁和锰除去,若采用曝气→一级过滤的简单工艺是不可能达到除锰的目的。为了尽可能除锰,一级除铁后的过滤出水,应增加了机械强制曝气措施,其目的有二个,一是尽量除去一级处理出水中的二氧化碳,提高水的PH值(据有关资料介绍,表面曝气法可以去除5070的二氧化碳)二是尽可能的向一级出水中充氧(溶解氧饱和度可达8090),将水中的二价锰大部分氧化成三价锰,然后进入二级过滤时,将水中的锰和一级过滤后残留在水中的铁彻底除去,保证出水水质。关键词溶解氧法,除铁,除锰,曝气,二级过滤XXX毕业设计第2页共43页AbstractGroundDOActiron,manganeseprocess,thereisseveralforms.Whatkindofselectionprocessmainlydependsontheoriginalchemicalcompositionofwater,aswateralkalineIronandmanganesecontent.Whenalkalinityislessthan2.0mg/lRail2.0mg/lManganeseislessthan1.5mg/ldealswithasimpleaerationfilter,inadditiontoiron,andmanganesefromthepurpose.Whenthewatercontentoftheironmanganesethan5mg/lthan1.5mg/lwhentwocommonlyusedfilteringtechnologyInadditiontoafirstfilterironandtwofilteredmanganesereasonisthatwhenironandmanganeseexistinthewater,caninterferewithironmanganeseremoval,especiallyironandmanganesecontentishigh,withtheexceptionofmanganeseisevenmoredifficult.Itismusttogetaaerationsecondaerationfilter→secondaryfiltrationprocess,inordertothewatertoremoveironandmanganese.Ifusingaeration→asimplefilteringprocessisunlikelytobeabletoachievethepurposeofmanganese.Totheextentpossible,manganese,ironafterafilterfromthewater,shouldincreasethemandatorymechanicalaerationmeasures,thepurposeofwhichistwo.First,asatreatmenttoremovecarbondioxidefromthewater,raisingthepHofwateraccordingtotheinformationsheets,surfaceaerationmethodcanremovethecarbondioxide5070Second,asmuchaspossibleoutofthewatertoa256dissolvedoxygensaturationofupto8090Waterwillbethetwomostmanganeseoxideofmanganeseintothree,andthenentertwofilters,ofmanganeseinwaterfiltrationandaresidueofironinthewaterremovedcompletely,andensurewaterquality.KeywordsDOAct,removingiron,removingmanganese,aeration,secondaryfilterXXX毕业设计第3页共43页目录摘要ⅠABSTRACTⅡ1设计说明书..............................................................................................................................11.1工程设计基础资料..............................................................................................................51.1.1城市概况.......................................................................................................................51.1.2气候条件.......................................................................................................................51.1.3水文...............................................................................................................................51.1.4地貌...............................................................................................................................61.1.6给水量计算参数...........................................................................................................71.1.6.1最高日人均给水定额..............................................................................................71.2设计方案选择的说明..........................................................................................................71.2.1设计方案的提出...........................................................................................................71.2.2方案的比较选择...........................................................................................................81.3滤池的选择说明..................................................................................................................81.3.1设计原则.......................................................................................................................81.3.2普通快滤池与V型滤池的比较..................................................................................91.3.3普通快滤池的设计要求...............................................................................................91.4除铁滤池前曝气说明........................................................................................................101.5除铁滤池的设计说明........................................................................................................101.6除锰滤池前曝气说明...................................................................................................101.7除锰滤池的设计说明........................................................................................................101.8消毒系统的说明................................................................................................................111.9清水池和二级泵房的设计说明........................................................................................111.9.1清水池的说明..............................................................................................................111.9.2泵房的说明..................................................................................................................111.10水厂辅助设计说明..........................................................................................................111.10.1水厂自动控制系统....................................................................................................111.10.2水厂面积规划............................................................................................................122设计计算书.............................................................................................................................132.1用水量的计算....................................................................................................................132.1.1最高日用水量.........................................................................................................132.2管网的水力计算................................................................................................................142.2.1管材选择与管网附件布置.........................................................................................142.2.2比流量计算.................................................................................................................152.2.3沿线流量计算..............................................................................................................152.2.4节点流量计算..............................................................................................................162.3除铁滤池前简单曝气设备................................................................................................232.3.1供气设备......................................................................................................................232.3.2混合器..........................................................................................................................232.4除铁滤池的设计计算........................................................................................................23XXX毕业设计第4页共43页2.4.1设计参数......................................................................................................................232.4.2滤池面积及尺寸...................................................................................................242.4.3滤池高度......................................................................................................................242.4.4滤他的各种管渠计算.................................................................................................252.4.5反冲洗高位水箱..........................................................................................................262.4.6配气系统设置.............................................................................................................262.5除锰滤池前曝气设备........................................................................................................262.6除锰滤池的设计计算.........................................................................................................272.6.1设计参数......................................................................................................................272.6.2滤他面积及尺寸..........................................................................................................272.6.3滤池高度.....................................................................................................................282.6.4滤他的各种管渠计算.................................................................................................282.6.6配气系统设置..............................................................................................................302.7回收水池及回收水泵...................................................................................................302.8水池调节容积...............................................................................................................302.9厂内配水井........................................................................................................................312.10消毒...................................................................................................................................312.10.1消毒设计计算............................................................................................................312.10.1.1加氯量....................................................................................................................312.10.2加氯间、氯库的设计要求........................................................................................322.11吸水井...............................................................................................................................322.12二泵房的设计..................................................................................................................322.12.1泵的选型...................................................................................................................322.12.2水管水头损失............................................................................................................332.12.3水泵安装高度的计算................................................................................................332.12.4泵房平面尺寸............................................................................................................342.12.5泵房高度的计算........................................................................................................342.12.6真空泵的选型计算....................................................................................................342.13厂区内排水的计算.........................................................................................................352.13.1雨水口布置................................................................................................................352.13.2集水坑计算....................................................................................................................352.13.3潜水泵的选择...........................................................................................................352.14构筑物及连接管水头损失的计算.................................................................................362.15水厂总体设计..................................................................................................................36参考文献.....................................................................................................................................38附录............................................................................................................................................39开题报告任务书

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