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  • 2023-01-03 08:31:11 发布

某城市排水系统及污水处理设计

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摘要伴随着中国城市化进程的加快,中国必须提高环保意识,逐步扭转社会发展进步与保护环境之间的矛盾,努力构建社会主义和谐社会。现有辽宁省大连地区A城市为扭转城市发展与环境污染之间的矛盾,改善居民生活环境,提高城市形象,改善投资环境,需要设计一套城市排水系统,将城市生活污水与工业废水集中至污水厂处理。经过对该市污水水质水量以及相应的出水标准的分析,采用SBR工艺对污水进行生化处理,可以同步实现去除BOD、脱氮、除磷。来水悬浮物浓度为305.14mg/L,BOD5浓度为207.71mg/L,处理后悬浮物浓度和BOD5浓度达到《污水综合排放标准》,均小于10mg/L。污水处理过程包括:污水总泵站——格栅——沉砂池——初沉池——SBR生化池——消毒接触池——巴氏计量槽。污泥处理过程包括:浓缩池——贮泥池——消化池——脱水间。由于在浓缩池、贮泥池、消化池中污泥的停留时间过长,上清液中含有大量的磷,故而需要将上清液加以处理。处理后的上清液回流至泵站,产生的泥渣作为生活垃圾卫生填埋或则用作农用肥。关键字污水处理;SBR;脱氮;除磷\nAbstractCoupledwiththeaccelerationofChineseurbanization,Chinamustadvancesenvironmentalconsciousnessandgraduallyresolvesthecontradictionbetweenenvironmentprotectionandsocialdevelopmentsoastobuildsocialisticconcordantsociety.Now,acityinLiaoNingProvinceneedamunicipaldrainagesystemtocollectsewageandindustrialeffluenttogetherandtreatittomeetthegoaloffabricateurbanimage,ameliorateinvestmentenvironment.Consideringwastewater’sactualconditionandthedischargestandard,SBRischosenasthemostfavorabletechnique.Theconcentrationofsuspendedsolidsis305.14mg/L,andtheconcentrationofBOD5is207.71mg/L.Afterdisposing,theconcentrationofSSandBOD5arebothlessthan10mg/LandaccordwithIntegratedWastewaterDischargeStandard.Sewagetreatmentprocessinclude:PumpingStation——Grill——PreliminarySedimentationTank——SequencingBatchReactor——DisinfectionTank——Parshallflume.Sludgeprocessinclude:SludgeThickener——Sludgebulking——SludgeDigestionTank——SludgeDewateringStation.AsthesludgestayedtoolonginSludgeThickener、SludgebulkingandSludgeDigestionTank,thesupernatantcontainingalotofphosphorus,supernatantthereforeneedtobedisposed.Afterdisposing,supernatantreturntoPumpingStation,andthesludgeasasolidwastesanitarylandfill,orisusedasafarmfertilizer.Keywordswastewatertreatment;SBR;nitrogenremoval;dephosphorization\n目录摘要IAbstractII第1章绪论11.1概述11.1.1城市概况11.1.2设计范围11.1.3设计任务21.2设计资料21.2.1地形与城市规划资料21.2.2气象资料31.2.3地质资料41.2.4受纳水体水文与水质资料4第2章排水管网的规划设计52.1城市排水管网定线原则52.1.1排水工程规划设计的基本原则52.1.2排水管网的管道定线原则62.2排水体制确定及区域划分62.2.1排水体制的选择62.2.2排水区域的划分82.3排水系统的布置形式82.4污水设计流量的计算92.4.1水量计算公式92.4.2软件参数102.5污水管网的水力计算112.5.1水力计算的基本公式112.5.2污水管道水力计算的设计数据122.5.3污水管道水力计算时应注意的问题132.5.4污水管道水力计算结果14第3章雨水管渠设计153.1雨水管渠系统平面布置的原则153.2雨水管渠设计流量的确定163.2.1暴雨强度公式的确定16\n3.2.2雨水管渠设计流量计算公式163.2.3径流系数ψ的确定173.2.4雨水管渠设计流量的计算173.3雨水管渠的水力计算183.3.1雨水管渠水力计算的设计数据183.3.2雨水管渠水力计算的方法18第4章污水泵站的设计204.1综述204.2初选水泵214.2.1预选水泵型号214.2.2水泵设计流量与扬程224.2.3水泵性能参数234.3集水井计算234.4泵站的附属设施计算254.4.1格栅计算254.4.2其它附属设施计算274.5泵房布置计算284.5.1泵房平面布置284.5.2泵房标高设计29第5章污水处理厂设计初步325.1设计方案的选择325.2污水量及污水处理程度的计算335.2.1污水设计流量335.2.2污水水质污染程度计算345.2.3污水处理程度计算34第6章污水的一级处理406.1格栅的设计计算406.2沉沙池的设计计算426.3初次沉淀池466.3.1沉淀池池体设计计算466.3.2进水集配水井设计49第7章污水的二级处理——SBR反应器537.1设计参数53\n7.2曝气池尺寸计算557.3进出水系统557.4曝气系统的计算与设计56第8章污水的后续处理608.1消毒接触池的设计计算608.2污水计量设备63第9章污泥处理679.1污泥量计算679.1.1初沉池污泥量计算679.1.2剩余污泥量计算679.2污泥浓缩池计算689.3贮泥池设计计算729.4消化池设计计算749.4.1容积计算749.4.2平面尺寸计算769.4.3消化池热工计算779.4.4混合搅拌设备849.4.5消化后污泥量计算859.4.6沼气产量869.4.7一级消化池的管道系统879.4.8二级消化池的管道系统899.4.9贮气柜919.4.10沼气压缩机929.5污泥脱水939.5.1污泥脱水量计算939.5.2脱水机器的选择94第10章污水处理厂的布置9510.1污水厂的平面布置9510.1.1各处理单元构筑物的平面布置9510.1.2管道及渠道的平面布置9510.1.3附属建筑物9610.2污水厂的高程布置9710.2.1污水的高程布置97\n10.2.2污泥的高程布置9810.3土建与公共工程9910.3.1土建工程9910.3.2公共工程99第11章污水处理厂投资估算与技术经济评价10111.1投资估算10111.1.1估算范围10111.1.2编制依据10111.1.3投资估算10111.2劳动定员10111.2.1生产组织10111.2.2劳动定员10211.2.3人员培训10211.3运行费用和成本核算10211.3.1成本估算的有关单价10211.3.2运行成本估算10311.3.3运行成本核算105致谢106参考文献107附录1排水管网方案A计算表109附录2排水管网方案B计算表137附录3雨水干管计算表165附录4空气管路计算表167附录5空气管路计算用图169附录6污水高程计算表170附录7污泥高程计算表171附录8污水厂投资估算表172\n第1章绪论1.1概述1.1.1城市概况城市排水工程对于保护环境,促进工农业生产,保障人民健康都具有十分重要的意义,本设计为辽宁省大连地区A市的城市排水工程。本工程为辽宁省大连地区某市的城市排水工程。该市占地11.2km2,人口约16.8万,属于中小城镇。该地区地势呈南北走向,北部地势高,南部地势低;中部高,东西方向略低;平均的坡度为1‰。从城市布局看,Ⅰ区属于老城区,Ⅱ区属于新城区,Ⅲ区属于开发区,城市整体沿着铁路和河流向东部发展。该镇地面平整,城市道路基本与等高线平行或略有交叉,属亚粘土区。城市常年主导风向为西风。镇南有河流经过,自西向东流。因为该镇人口较多,城市污水排放量大,鉴于该城市的具体情况,市政府决定投资兴建污水排放及处理设施,以解决日益严重的环境问题。该项目对改善城市河流环境,保护人民身体健康,加速城市现代化建设具有重要的意义。1.1.2设计范围辽宁省大连地区A市没有污水排放及处理设施,本次设计设计范围包括排水管网、污水泵站、污水及污泥处理的方案选则、技术经济分析、工业设计及部分施工图设计、工程概算等。\n1.1.3设计任务1.分析自然现状的排水条件,经济合理的确定城市排水体制。2.并确定排水管网的走向和位置,并进行经济比较。3.泵站的数量和规模。4.确定污水厂位置和规模。5.进行管网的水力计算。6.确定污水和污泥的处理流程,进行各构筑物的设计计算。7.进行经济概算,成本核算。8.绘制相关图纸。1.2设计资料1.2.1地形与城市规划资料(1)城市地形与总体规划平面图一张,比例为1:10000(2)城市各区人口密度与居住区生活污水量标准(平均日)表1—1人口密度(人/公顷)污水量标准(升/人·日)Ⅰ区140140Ⅱ区150160Ⅲ区160160(3)城市各区中各类地面与屋面的比例(%):表1—2\n区域各种屋面混凝土与沥青路面碎石路面非铺砌土路面公园与绿地Ⅰ区5010101020Ⅱ区5010102010Ⅲ区5010201010(4)工业企业与公共建筑的排水量和水质资料:表1—3企业或公共建筑名称平均排水量m3/d最大排水量m3/dSSmg/lCODmg/lBODmg/l总氮mg/l总磷mg/lPH水温℃火车站6005030040020020107.010造纸厂400020024006000110040207.920游乐场6005030040020020107.0151.2.2气象资料(1)气温(℃)等资料表1—4年平均气温11月平均最高24年最低气温-24月平均最低-20温度在-10°以下的天数(天)60温度在0°以下的天数(天)90年最高气温31月平均气温11\n降雨量(mm/年)400年蒸发量(mm/年)200(2)常年主导风向:西风最大风速:40m/s(3)设计暴雨强度公式及其参数:1.2.3地质资料表1—5土壤性质冰冻深度m地下水位m承载力Kpa排水管网干管处亚黏土-1.2-8.0≥200污水总泵站与污水处理厂址亚黏土-1.2-8.0≥2001.2.4受纳水体水文与水质资料表1—6流量流速水位标高m水温DOmg/lBODmg/lSSmg/lSS允许增加量mg/l最小流量401.298.01041.02.10.1最高水位701.6100.02061.02.40.1常水位时501.499.01851.02.20.1在污水总排放口40公里处有风景区,要求BOD≤1.1mg/l\n第1章排水管网的规划设计2.1城市排水管网定线原则2.1.1排水工程规划设计的基本原则排水工程是现代化城市和工业企业不可缺少的一项重要设施,是城市和工业企业基本建设的一个重要组成部分,同时也是控制水污染、改善和保护环境的重要措施。排水工程的设计对象是需要新建、改建或扩建排水工程的城市、工业企业和工业区。他的主要任务是规划设计收集、输送、处理和利用各种污水的整套工程设施和构筑物,水管道系统和污水厂的规划和设计。排水工程的规划设计是在区域规划以及城市和工业企业的总体规划基础上进行的,因此,排水系统规划设计的有关基础资料,应以区域规划以及城市和工业企业的规划与设计方案为依据,排水系统的设计规模、设计期限应根据区域规划以及城市的规划方案的设计规模和设计期限而定。排水工程的规划与设计,应遵循下列原则:⒈排水工程的规划应符合区域规划以及城市和工业企业的总体规划,并应与城市和工业企业中其他单项工程建设密切配合,互相协调。⒉排水工程的规划与设计,要与邻近区域内的污水和污泥的处理和处置协调。⒊排水工程的规划与设计,应处理好污染源治理与集中处理的关系。⒋城市污水是可贵的淡水资源,在规划中要考虑污水经再生后回用的方案。⒌排水工程的设计应全面规划,按近期设计,考虑远期发展有扩建的可能。并应根据使用要求和技术经济的合理性等因素,对近期工程做出分期建设的安排。\n计排水工程时,必须认真贯彻执行国家和地方有关部门的现行有关标准、规范和规定。⒎设计中应认真贯彻执行“全面规划、合理布局、综合利用、化害为利、依靠群众、大家动手、保护环境、造福人民”的环境保护工作方针。2.1.2排水管网的管道定线原则在城镇(地区)总平面图上确定污水管的位置和走向称为污水管道系统的定线。正确的定线是合理的经济的设计管道系统的先决条件,是污水管道系统设计的重要环节。定线应遵循的重要原则是:应尽可能地在管线较短和埋深较小的情况下,让最大区域的污水能自流排出。为实现这一原则,定线时必须很好地研究各种条件,使拟订的路线能因地制宜的利用其有利因素而避免不利因素。定线时通常考虑的几个因素是:地形和用地布局,排水体制和线路数目,污水厂和出水口位置,水文地质条件,道路宽度,地下管线及构筑物的位置,工业企业和产生大量污水建筑物的分布情况,其中地形是影响管道定线的主要因素。2.2排水体制确定及区域划分2.2.1排水体制的选择合理的选择排水系统的体制,不仅从根本上影响排水系统的设计、施工、维护管理,而且对环境影响深远。同时体制的选择也影响排水系统工程的总投资和初期投资费用。排水系统体制的选择应满足环境保护的需要,根据当地条件,通过技术经济比较确定。城市排水体制和管道系统是整个水污染控制和水太保护系统中的重要环节。但是数十年来过内对它们的研究显得十分薄弱,工程时间中暴露出许多矛盾和问题难以得到科学解答和技术支持,与发达国家相比至少有10年以上的差\n距,在发达国家,已经不仅仅处于简单的“雨污分流”等传统的观念了,已经明显地不能满足现代城市发展和生态环境保护的要求,例如美国现在已经成功的控制了点源污染,并且开始重视非点源污染和雨水径流的的控制。德国、日本,新西兰等这些发达国家也和美国差不多,对雨水的污染也进行了有效的控制。此外,我国在污水处理技术方面有一种倾向,认为活性污泥法是最有效的,忽视和排斥了其它的处理方法和技术。其实在任何国家,都不是任何一种单一的处理方法能完全解决污水处理和水环境污染问题的,即使在发达国家。例如,美国也是采用多种处理方法来处理城市污水和工业废水的,美国共有稳定塘上万座,占处理污水总量的25%,它与土地处理,人工湿地等系统成为中小社区(城镇)的主要处理设施。近十年来,英国、德国、法国、荷兰等的人工湿地发展迅速,它与塘系统不仅成为中小城镇的主要污水处理设施,而且也成为雨水处理的主要设施,以及工业废水重要的处理技术。在我国,现在依然使用传统的排水体系,存在的主要问题有以下4点:1.雨水资源大量流失,地下水位和地面下沉,水涝增加,城市生态环境恶化;2.合流制溢流和分流制的雨水污染并存,将合流改为分流虽然减少溢流的污染,但不能控制甚至会相应增加分流雨水的污染;3.合流制改建为分流制耗资巨大,耗时长,还有污染隐患;4.严重的雨污水管混接抵消了分流的作用,污染依旧,效益降低。就全国来说,城市生活污水排放量已达到全国废水排放总量的40%左右,很多大城市及沿海城市甚至接近70%,而我国的城市污水处理率却还不到10%。城市日供水能力和污水处理不成比例,差距越来越大,使得城市生活污水对水环境的影响也越来越大。据统计,我国工业废水处理设施的总处理率已达到87%,但实际上得到处理的工业废水还达不到该值。一些调查统计表明,我国工业废水处理设施只有1/3是运行正常的,1/3运行不正常,而另1/3停产不运行。不少污水处理厂有钱建得起,却无钱维持正常运行,一些中小城市建成的常规活性污泥法处理厂尤其如此,除资金缺乏之外,操作运行和管理人员技术和管理水平低,难以掌\n握和操作技术复杂的处理过程和设备。从造价方面看,据国外有的经验认为合流制排水管道的造价比分流制一般要低20℅~40℅,可是合流制的泵站和污水厂却比分流制的造价要高。从维护管理方面来看,晴天时污水在合流制管道中只是部分流,雨天时才接近满管流,因而晴天时合流制管内流速较低,易于产生沉淀。而分流制排水系统可以保持管内的流速,不致发生沉淀,同时,流入污水厂的水量和水质比合流质变化小的多,污水厂的运行易于控制。从技术处理方面看,混合制把工业废水和生活污水混合排放,加大了污水的处理难度。雨水虽然一般比较清洁,但是,随着工业化水平的提高,目前,雨水污染非常严重,特别是初期降雨时,雨水径流会挟带着大气、地面和屋面上的各种污染物,应给予特别的重视。对雨水进行处理已经是大势所趋。根据以上四个方面,综合考虑A市的现有情况,决定采用分流制排水系统。它可以更有效率的处理污水,为远期建设雨水处理提供基础。因此,在本设计中只设计了一条雨水管道,以便于以后建设时提供参考。2.2.2排水区域的划分在本设计中,是以火车道为排水分界的,分为南北两区。2.3排水系统的布置形式城市、居住区或工业企业的排水系统在平面上的布置,随地形、竖向规划、污水厂的位置、土壤条件、河流位置,以及污水的种类和污染程度等因素而定。城市街道属于正南北、正东西走向,但是等高线与街道呈斜交叉,由于铁路分隔,确定为分区排水。且城市北高南低,所以采用正交截留式。由于干管方向为正东,而等高线有一定弧度,所以部分管线埋身会增大。管网预定了两个方案,属于局部比较,采用分区的正交截留式排水。方案一:以火车道为分界,分为南北两区,两根主干管,穿越一次铁路,但一\n段排水管从低处向高出排,增加了埋身,增加了施工难度和工程造价。方案二:以北区的地势变化趋势最大的等高线垂直线分界,实现污水从高出排向低处,但是干管比方案一长,且穿越两次铁路。2.4污水设计流量的计算2.4.1水量计算公式1.总变化系数KZ(2-1)式中Qd——平均日污水流量,L/s。2.居民污水设计流量Q1(2-2)式中qi——各排水区域平均日居民生活污水量标准,L/(cap·d);Ni——各排水区域在设计使用年限终期所服务的人口数,cap。3.工业废水设计流量Q2(2-3)式中qi——各工矿企业废水量定额,m3/单位产值;Ni——各工矿企业最高日生产产值;Ti——各工矿企业最高日生产小时数,h;fi——各工矿企业生产用水重复利用率;Ki——各工矿企业废水量的时变化系数。\n2.4.2软件参数分别对两方案进行计算,为提高计算精度,节省时间,应用电子计算机进行计算,该计算软件需输入:NO.N——序号;L(N)——管道长度,m;MM(N)——人口密度,cap/hm2;F(N)——汇流面积,hm2;QW(N)——本段平均转输流量,L/s;QJ(N)——本段转输集中流量,L/s;H(N)——管段上端地面标高,m;H(N+1)——管段下端地面标高,m;输出结果:QB(N)——本段平均流量,L/s;Q(N)——平均合计平均流量,L/s;KZ(N)——总变化系数;QK(N)——本段生活污水设计流量;QJB(N)——本段集中流量,L/s;QS(N)——设计流量,L/s;D(N)——管径,mm;I(N)——设计坡度;V(N)——流速,m/s;HD(N)——充满度HDS(N)——跌水高度,m;HIL(N)——管段坡降;HS(N+1,1)——管段下段水面标高,m;HS(N,2)——管段上端水面标高,L/s·haHMN2——管段上端埋深,m\nHMN11——管段下端埋深,mMM(N)——人口密度,cap/hm2WB(N)——比流量,L/(s·hm2)QO(N)——造价,YUAN;ZJ(N)——总面积,hm2ZMJ——总管长,YUAN;ZGC——总管长,YUAN;GWMD——管网密度,m/hm2。并得出各管段计算结果及工程概算。具体计算结果附录1。2.5污水管网的水力计算污水管道水力计算的目的在于合理的经济的选择管道断面尺寸、坡度和埋深,由于这种计算根据水力学规律,所以称为管道的水力计算。2.5.1水力计算的基本公式为简化计算工作,水力计算采用均匀流公式。流量公式:(2-4)流速公式:(2-5)式中Q——流量(m3/s);A——过水断面面积(m2);v——流速(m/s);R——水力半径(过水断面面积与湿周的比值)(m);I——水力坡度(等于水面坡度,也等于管底坡度);C——流速系数或称谢才系数,C值一般按满宁公式计算,即:\n(2-6)式中n——管壁粗糙系数,混凝土管为0.014。2.5.2污水管道水力计算的设计数据1.设计充满度在设计流量下,污水管道的水深h和管道直径D的比值为设计充满度,当h/D<1时称为不满流。考虑到污水管道流量时刻在变化,难以精确计算且雨水与地下水可能通过检查井盖或管道接口汇入,其内沉积的污泥可能分解析出一些有害气体,以及便于维护管理和疏通,所以污水管道按不满流进行设计。2.设计流速和设计流量、设计充满度相应的水流平均速度叫设计流速。当污水管道内水流流动缓慢时,污水中所含杂质可能下沉,产生淤积,当流速增大时,又可能产生冲刷现象,甚至损坏管道,因此,流速应控制在一个范围内。我国污水管道的最小设计流速为0.6m/s。3.最小管径管径小,管道容易堵塞,清通也较困难,因此,为了养护工作的方便,规定了一个允许的最小管径。在街区和厂区内最小管径为200mm,街道为300mm。4.最小设计坡度相应于管内流速为最小设计流速时的管道坡度叫做最小设计坡度。我国规定,管径200mm的最小设计坡度为0.004,管径300mm的最小设计坡度为0.003。5.埋设深度管道内壁到地面的距离叫做埋设深度。管道外壁顶部到地面的距离叫覆土厚度。埋设深度对工程造价的影响很大,因此,为了降低造价,缩短工期,管道埋设深度愈小愈好,但覆土厚度应有一个最小的限值,由一下三个因素考虑:①冰冻线深度\n《室外排水设计规范》规定:无保温措施的生活污水管道或水温与生活污水接近的工业废水管道,官底可埋设在冰冻线以上0.15m。①面荷载埋设在地面下的污水管道承受着覆盖其上的土壤静荷载和地面上车辆运行产生的动荷载。为了防止管道因外部荷载影响而损坏,车行道下的污水管最小覆土厚度不宜小于0.7m。②必须满足管道衔接的要求为使建筑物首层卫生设备的污水能顺利排出,污水出户管的最小埋深一般采用0.5~0.7m,所以街坊污水管道起点最小埋深也应有0.6~0.7m。根据街区污水管起点最小埋深值,可由下式计算街道管网起点的最小埋设深度。(2-7)式中H——街道污水管网起点的最小埋深,m;h——街区污水管起点的最小埋深,m;Z1——街道污水管起点检查井处地面标高,m;Z2——街区污水管起点检查井处地面标高,m;I——街区污水管和连接支管的坡度;L——街区污水管和连接支管的总长度,m;Δh——连接支管与街道污水管的管内底高差;另外,埋深最大也有限定,一般在干燥土壤中,最大埋深不超过7~8m;在多水、流沙地层中,一般不超过5m。2.5.3污水管道水力计算时应注意的问题1.必须细致研究管道系统的控制点;2.必须细致研究管道敷设坡度与管线经过地段的地面坡度之间的关系。3.水力计算自上游依次向下游管段进行,一般情况下,随着设计流量逐段增加,设计流速也相应增加。4.在地面坡度太大的地区,为减小流速,可考虑设置跌水井。5.\n为了减小水流通过检查井时的水头损失,检查井底部在直线管道上要严格采用直线,在管道转弯处要采用匀称的曲线。1.在旁侧管与干管的连接点处,要考虑干管的已定埋深是否允许旁侧管接入。2.5.4污水管道水力计算结果计算出两套方案,通过技术经济比较,最终确定方案一更节约,确定方案一为最终方案。比较结果见表2-1。表2—1方案提升点提升流量提升扬程造价管网造价总造价L/sm万元万元万元A9221.574.415125.89876.561053.1530104.945.73850.70B7136.016.19665.71817.901075.9032480.584177.014241.676.45115.27比较     22.75方案一的计算结果见表2-2。表2—2总面积总管长总造价管网密度单位造价(HA)(m)(¥)(m/HA)(¥/m)1118.9537440.733.46234.12总人口设计流量平均管径平均坡度 (人)(L/s)(m)(‰) 516.210.499880.7081 本设计总共设两个中途提升泵站分别为9点,30点。其中9点提升流量291.77L/s,提升扬程4.417m,选用400QW1250-5-30型号的潜污泵;30点提升流量113.19L/s,提升扬程5.735m,选用200QW400-7-15型号的潜污泵。\n第1章雨水管渠设计雨水管渠系统是由雨水口、雨水管渠、出水口等构筑物所组成的一整套工程设施。雨水管渠系统的任务就是及时地汇集并排除暴雨形式的地面径流,防止城市居住区与工业企业受淹,以保障城市人民的生命安全和生活生产的正常秩序。在雨水管渠系统设计中,管渠是主要的组成部分,所以合理而又经济地进行雨水管渠的设计具有很重要的意义。雨水管渠设计的主要内容包括:1.确定当地的暴雨强度公式。2.划分排水流域,进行雨水管渠的定线,确定可能设置的调节池、泵站位置。3.根据当地气象与地理条件,工程要求等确定设计参数。4.计算设计流量和进行水力计算,确定各设计管段的断面尺寸、坡度、管底标高及埋深。5.绘制管渠平面图及纵剖面图。3.1雨水管渠系统平面布置的原则雨水管渠系统设计的基本要求是能通畅及时地排走城镇或工厂汇水面积内的暴雨径流量。其管道定线原则基本同污水管道,有一下几条:1.充分利用地形,就近排入水体,雨水管渠应尽量利用自然地形坡度以最短的距离靠重力流排入附近池塘、河流、湖泊等水体中。2.根据城市规划布置雨水管道。3.合理布置雨水口,以保证路面雨水排除通畅。4.雨水管道采用明渠或暗管应结合具体条件确定。5.设置排洪沟排除设计地区以外的雨洪径流。\n3.2雨水管渠设计流量的确定3.2.1暴雨强度公式的确定暴雨强度是指某一连续降雨时段内的平均降雨量,既单位时间内平均降雨深度,工程上常用单位时间内单位面积上的降雨体积q(L/(s·ha))表示。暴雨强度是描述暴雨特征的重要指标,也是决定雨水设计流量的主要因素,因此我们有必要对其进行研究并推求出其计算公式。暴雨强度公式是在各地自记雨量记录分析整理的基础上按一定方法推求出来的,我国常采用的暴雨强度公式形式为:(3-1)式中q——设计暴雨强度(L/s·ha)P——设计重现期(a);t——降雨历时(min);A1、c、b、n——地方参数,根据统计方法进行计算确定。本设计的对象辽宁省大连市暴雨强度公式可由手册中查得,为:t=t1+mt2;m——折减系数,管道采用2,明渠采用1.2。3.2.2雨水管渠设计流量计算公式雨水设计流量按下式计算:(3-2)式中Q——雨水设计流量,L/s;ψ——径流系数,其数值小于1;F——汇水面积,ha;\nq——设计暴雨强度,L/(s·ha)。3.2.3径流系数ψ的确定降落在地面上的雨水,一部分被植物和地面湿地截流,一部分渗入土壤,余下的一部分沿地面流入雨水管渠,这部分进入雨水管渠的雨水量称作径流量,径流量与降雨量的比值称径流系数ψ,其值常小于1。通常汇水面积是由各种性质的地面覆盖所组成随着它们占有的面积比例变化,ψ值也各异,所以整个汇水面积上的平均径流系数是各类地面面积加权平均计算而得到,即:(3-3)式中Fi——汇水面积上各类地面的面积,ha;ψi——相应于各类地面的径流系数;F——全部汇水面积。由原始资料可知该市各区中各类地面与房屋面的比例,依此再由上式可计算出该市各区的径流系数ψ:ψⅠ=0.9×50%+0.9×10%+0.4×10%+0.3×10%+0.15×20%=0.640ψⅡ=0.9×50%+0.9×10%+0.4×10%+0.3×20%+0.15×10%=0.655ψⅢ=0.9×50%+0.9×10%+0.4×20%+0.3×10%+0.15×10%=0.6653.2.4雨水管渠设计流量的计算计算机计算结果见附表2。\n3.3雨水管渠的水力计算3.3.1雨水管渠水力计算的设计数据为了使雨水管渠正常工作,避免发生淤积、冲刷等现象,对雨水管渠水力计算的基本数据作如下规定。⒈设计充满度雨水中主要含有泥沙等无机物质,不同于污水的性质,加以暴雨径流量大,而相应较高设计重现期的暴雨强度的降雨历时一般不会很长,故管道设计充满度按满流考虑,既h/D=1。⒉设计流速为避免雨水所挟带的泥沙等无机物质在管道内沉淀下来而堵其管道,雨水管渠的最小设计流速应大于污水管道,满流时管道内的最小设计流速为0.75m/s。为防止管壁受到冲刷而破坏,影响及时排水,对雨水管渠的最大设计流速规定为:金属管最大流速10m/s,非金属管最大流速5m/s。⒊最小管径和最小设计坡度雨水管道的最小管径为300mm,相应的最小坡度为0.003,雨水口连接管最小管径为200mm,最小坡度0.01。⒋最小埋深与最大埋深具体规定同污水管道。3.3.2雨水管渠水力计算的方法水力计算仍是按均匀流考虑,其水力计算公式与污水管道相同,但按满流即h/D=1计算。雨水管网的水力计算通过计算机完成,具体结果见附录电算结果附录三。需要输入:NO.NL(N)————序号管道长度,m;\nF(N)——管段汇水面积,hm2;H(N)——管段上端地面标高,m;H(N+1)——管段下端地面标高,m;输出结果:Q(N)——管段输水能力,L/s;QS(N)——管段雨水设计流量,L/s;D(N)——管径,mm;I(N)——水力坡度;V(N)——管段设计流速,m/s;HIL(N)——水力坡降;HMN2——管段上端埋深;HMN11——管段下端埋深;QO(N)——设计暴雨强度,L/(s·hm2);HS(N,2)——管段上端水面标高,m;HS(N+1,1)——管道下端水面标高,m;ZJ(N)——造价,YUAN;ZJN——总造价,YUAN;ZLN——总管长,YUAN;T2(N-1)——设计管段集水时间,min;L(N)/V(N)——雨水在设计管段中的流行时间,min。\n第1章污水泵站的设计4.1综述污水泵站接纳来自整个城市排水管网的所有污水,其任务是将这些污水抽送到污水处理厂,以便污水在处理过程中为重力流。污水泵站所抽升的污水一般含大量杂质,起来水量逐日逐时都有很大的变化,这使得污水泵站有许多独特之处。污水泵站的组成:集水间﹑格栅﹑机器间﹑辅助间等。已知条件:1.泵站组合工作流量为设计流量Qmax=516.21L/s;2.进水管管底标高为92.32m,其地下埋深为6.88m,管径1000mm,充满度0.706,进水管水面标高93.02m;3.泵站出水经13m室外压水管线输送到出水井,出水井的水面标高103m;4.泵站附近地面标高99.20m,河流常水位99.00m;5.土质条件:粘土,冰冻线深度-1.2m,地下水位-8.0m(相对地面高度);6.供电,就近接电源。根据集水井和机器间的形状,以及水泵台数、工艺要求、施工条件、水量大小等因素,排水泵房可采用圆形泵房、矩形泵房和下圆上方形泵房的结构形式。圆形泵房结构受力条件好,便于采用沉井施工,可降低工程造价,水泵启动方便,但是机器间内机组与附属设备布置较困难;矩形泵房机器间机组、管道和附属设备的布置较为方便,操作管理条件好但造价费用高。综合上诉两中泵房的优缺点,本设计采用下圆上方形泵房。水泵根据吸水管的充水方式不同,排水泵站分为自灌式泵房和非自灌式泵房。为了减小泵房埋深,本设计采用非自灌式吸水,设置真空泵。\n4.2初选水泵4.2.1预选水泵型号1.流量拟用4台泵(三用一备),则每台泵流量为水泵的管道采用钢管,管径DN500mm。每台水泵设1条吸水管道和一条压力管道,单进单出,压水管通过DN800mm管径汇合后压入出水井中。2.水泵静扬程式中H1——水泵静扬程,m;h1——出水井水面标高,m;h2——集水井水面标高,m;h3——集水井有效水深,m,一般采用2~3m。设计中取h3=2.4mH1=103.0-(93.02-2.4)=12.38m3.水泵吸水管水头损失:取0.24.水泵压水管水头损失:取0.25.水泵扬程式中H——水泵扬程,mH4——自由水头损失,m一般采用1~2m。设计中取H4=1.5mH=12.38+0.2+0.2+1.0=13.78m6.预选定水泵型号选用4台8PWL型污水泵,每台污水泵流量Q=172.07L/s,扬程H=14m。\n4.2.2水泵设计流量与扬程1.水泵吸水管水头损失(4-1)式中H2——水泵吸水管水头损失,m;L——水泵吸水管长度,m;i——水力坡度,‰;ξ2——阻力系数;v2——水泵吸水管内水流流速,m/s,一般采用0.7~1.5m/s。设计中每个吸水管管径DN500mm,L2=5.875m,v2=0.84,1000i=1.94。吸水管上安装DN700mm×500mm的吸水喇叭口1个(ξ=0.1),DN500mm弯头1个(ξ=0.64),DN500mm的阀门1个(ξ=0.1),DN500mm×250mm的偏心渐缩管1个(ξ=0.2),DN250mm的橡胶柔性接头1个(ξ=0.2)。2.水泵压水管水头损失(4-2)式中H3——水泵压水管水头损失,mL3——水泵压水管长度,mi3——水力坡度,‰ξ3——阻力系数;v3——水泵压水管内水流流速,m/s,一般采用0.8~2.5m/s。设计中每个压水管管径DN500,L1=2.750m,v1=0.84m/s,1000i=1.94;DN800,L2=18.624m,v1=1.01m/s,1000i=1.51;压水管上安装DN200mm×500mm的渐扩管1个(ξ=0.62),DN500mm的止回阀1个(ξ=2.5),DN500mm的阀门1个(ξ=0.1),安装DN500mm×\n800mm的渐扩管1个(ξ=0.54),DN800三通(DN800的90°弯头)1个(ξ=0.7),DN800mm弯头2个(ξ=0.7)。1.水泵扬程式中H——水泵扬程,mH4——自由水头损失,m一般采用1~2m。设计中取H4=1.5mH=12.38+0.17+0.28+1.0=13.83m4.2.3水泵性能参数选用4台8PWL型污水泵,每台污水泵流量Q=172.07L/s,扬程H=14m,转速n=730r/min,功率45kW,配套电机型号Y280M-8(V1),功率N=45kW,效率η=55%,气蚀余量6.6m,电机与水泵重T=1500kg,3用1备。表4—1型号ABCDFHNGL8PWL750500850650420410300103011504.3集水井计算1.集水井最高水位式中H1——集水井最高水位,m\nh1——进水管设计水位标高,mh2——格栅水头损失,m一般采用0.08~0.15m设计中取地面标高为99.2m,H1=93.022m,h2=0.1m1.集水井最低水位式中H2——集水井最低水位,mh3——有效水深,m一般采用1.5~2.5m。设计中取h3=2.4m,取90.500m2.集水井平面面积(4-3)式中A——集水井平面面积;V——集水井有效容积,m,一般采用最大一台水泵5min的出水量。设计中取V=51.6m3,取26m2取集水井的平面尺寸为10m×2.6m,根据泵房布置,实际尺寸略大。3.集水井底部标高(4-4)式中H3——集水井底部标高,m;h4——吸水喇叭口与集水井最低水位的距离,m一般采用0.4~1.2m;h5——吸水喇叭口与集水井底部的距离,m,h5=0.4~0.8D,D为吸水喇叭口下部直径,m;h喇叭——喇叭口高度,m。设计中取h4=0.9m,h5=0.6m,h喇叭=0.7m。\n1.集水井高度(4-6)式中H5——集水井总高度,m;H4——集水井高度,m,一般采用地面标高与最高水位标高之差。根据水量集水井高度过大,调整为5.580m。4.4泵站的附属设施计算4.4.1格栅计算1.格栅间隙数(4-7)式中n——格栅最大间隙数个数;Q——设计流量,m3/s;α——格栅倾角,°;b——栅条间隙,mh——栅前水深,mv——过栅流速,m/s;N——格栅数,个。设计中取α=60°,b=0.02m,v=0.8m/s,h=1.0m,N=2个个2.栅条宽度(4-8)式中B——栅条宽度,m;\nS——栅条宽度,m,一般采用0.005~0.01m。设计中取S=0.005m1.过栅水头损失(4-9)式中h1——格栅水头损失,m;k——系数,一般采用3;ξ——阻力系数,其数值与栅条断面形状有关,设计中采用锐边栅条。设计中取ξ=2.42×栅条后的自由跌落为0.068m,则格栅的水头损失为0.1m。2.栅条槽的总厚度(4-10)式中h——格栅槽的总高度,m;h2——格栅槽的超高,m,一般采用0.5m。3.每日栅渣量(4-11)式中W——每日栅渣量,m3/d;——平均流量,m3/sW1——每103m3污水的栅渣量,m3/103m3;一般采用0.03~0.1m3/103/m3污水。设计中取W1=0.05m3/103m3污水,\n采用机械清渣,机械挤压打包运走。4.4.2其它附属设施计算1.水泵集水井反冲管计算水泵运行时,集水井内可能淤积一些沉淀的污泥,影响水泵吸水管吸水性能。设计中选择每台水泵压水管道上引入集水井内一条反冲洗管道,用来反冲洗集水井内淤积的污泥,经反冲浮起的污泥与污水一同由水泵运走。反冲洗采用钢管DN50mm,设计流量0.003m3/s,管内流速1.59m/s,水力坡度13.7‰。反冲洗出口采用DN50mm×40mm的渐缩管,用以增大出口流速。2.泵房内排水计算水泵房内地面做成1%的坡度,坡向集水槽和集水坑。集水槽宽0.2m,深0.3m,沿泵房内墙设置,坡向集水坑。集水坑平面尺寸1.25m×1.25m,深0.5m。选择两台50QW18-15-1.5潜污泵排水,将泵房内的积水排至集水井内。潜污泵设计流量18m3/h,扬程15m,转速2840r/min,电动机功率P=1.5kW,η=62.8%,W=60kg。3.泵房内通风计算设计中选择机械通风,通风换气次数为5~10次/h,通风换气体积按地面以下泵房体积计算,地面以下泵房体积不计入。选择两条通风管道,通风管道采用阻燃塑料管,管径DN300mm,管内流速10.5m/s,阻力损失0.41‰。通风管道进风口设在泵房底部,距离室内地面0.5m,排风口设在室外地面之上,高于室外地面0.4m。通风机选择两台轴流风机,设计流量3230m3/h,风压18.3mm水柱。4.起重计算为方便泵房内水泵和电机的安装,维护和更换,在泵房内设置起重设备。泵房内最大的设备是电机,设计中选择一台起重量1500kg,起升高度10m的手动单梁起重机SDQ-2。\n1.水泵基础计算基础长度L=地角螺钉间距+(400~500)=基础宽度B=地角螺钉间距+200=基础高度H==式中—水泵重量(kg);—电机重量(kg);—基础长度(m);—基础宽度(m);—基础密度(kg/m3)(混凝土密度ρ=2400kg/m3)。2.出水井计算水泵压水管出口接入出水井内,出水井采用自由式出水。平面尺寸3m×3m,有效水深3.6m。3.通风采暖设备泵房内采用自然通风,地上部分房间两面对称开窗,以造成对流,地下部分设通风管通风,采用双层玻璃保暖。由于本设计位于辽宁省,冬季较寒冷,采用暖气集中采暖方法。4.5泵房布置计算4.5.1泵房平面布置排水泵房采用合建式圆形干式泵房,集水井建于泵房的一侧,水泵直接从集水井内吸水,控制间与泵房建在一处。\n1.泵房长度(4-12)式中L——泵房长度,m;N——水泵台数,台;B1——水泵基础宽度,m;B2——水泵基础间距,m,一般采用0.8~1.5m;B3——检修通道宽度,m,一般采用B3=1.2~1.5m。设计中取B2=1m,B3=1.5m,2.泵房宽度(4-13)式中B——泵房宽度,m;L1——进水阀门宽度,m;L2——水泵进水渐缩管长度,m;L3——进水检修通道宽度,m,一般采用0.5~1.2m;L4——水泵基础长度,m;L5——出水端检修通道宽度,m,一般采用L5≥L4+1.0。3.泵房半径:综合长宽,选择直径15m。4.5.2泵房标高设计泵房内部标高主要根据进水管水面标高确定。1.水泵进水口水面标高=93.022m2.泵轴标高计算(4-14)\n式中HSS——泵轴最大安装高度,m;Pa——吸水井水面处的绝对大气压,kPa;HSV——气蚀余量,m∑hS——吸水管总水头损失,m;hVa——实际水温下的饱和蒸汽压力,mH2O。考虑水泵长时间使用吸水性能下降,取安装高度为2.00m,泵轴标高为92.500m。1.水泵基础顶标高=92.090m;2.泵房地面标高=91.100m;3.泵房地下部分埋深=99.200-91.100=8.100m;4.泵房房顶标高=104.000m。\n\n第1章污水处理厂设计初步5.1设计方案的选择长期以来,城市污水的处理均以去处BOD和SS为目标,并不考虑对氮、磷等无机营养物质的去除。随着化肥、洗涤剂和农药的普遍应用,污水中的氮、磷含量有了增加,其对环境的影响逐渐引起人们的重视。最突出的是水体特别是封闭水体的富营养化,表现为藻类的过量繁殖及继而引起的水质恶化;其次是氨氮的耗氧特性会使水体的溶解氧降低;此外,当水体的PH值较高时,氨对鱼类等水生生物具有毒性。因此,有效的降低水中的氨氮、磷的含量以成为现代废水处理技术的一项新课题。所以本设计生化处理部分采用SBR即间歇式活性污泥处理工艺,达到同时去处水中BOD5、SS、N、P的目的。SBR法有以下特征:1、在大多数情况下。无设置调节池的必要;2、SVI值较低,污泥易于沉淀,一般情况下,不产生污泥膨胀现象;3、通过对运行方式的调节,在单一的曝气池内能够进行脱氮和除磷反应;4、应用电动阀、液位计、自动计时器及可编程序控制器等自控仪表,可能使本工艺过程实现全部自动化,而又中心控制室控制;5、运行管理得当,处理水水质优与连续式,抗冲击负荷能力强。对于污水处理过程中产生的污泥,本设计采用二级消化处理的方法,使污泥中有机物质变为稳定的腐殖质,同时减少污泥体积,并改善污泥的性质,使之易于脱水,破坏和控制致病微生物,并获得有用的副产品-沼气。厌氧消化处理是根据消化过程中沼气产生的规律进行设计的。它具有节省污泥加温和搅拌所需能量的优点。\n5.2污水量及污水处理程度的计算5.2.1污水设计流量1.平均日流量:(5-1)式中——;————2.设计流量:(5-2)(5-3)式中\n5.2.2污水水质污染程度计算(5-3)式中表4—1 SSBOD5总氮总磷浓度mg/L305.14207.7124.755.65人口标准g/cap/d45303.50.5面积Ⅰhm2312.81312.81312.81312.81人口密度Ⅰcap/hm2140140140140面积Ⅱhm2511.27511.27511.27511.27人口密度Ⅱcap/hm2150150150150面积Ⅲhm2294.33294.33294.33294.33人口密度Ⅲcap/hm2160160160160火车站污水量m3/d600600600600火车站排放指标mg/L3002002010造纸厂污水量m3/d4000400040004000造纸厂排指标mg/L4003004020游乐场污水量m3/d600600600600游乐场排放指标mg/L30020020105.2.3污水处理程度计算一、污水的SS处理程度计算1.按水体中SS允许增加量计算排放的SS浓度\n计算处理后污水总出水口的SS浓度(5-5)式中计算处理浓度2.按二级生物处理后的水质排放标准计算SS处理程度根据国家《城镇污水处理厂污染物排放标准(GB18918-2002)》中规定城市二级污水处理厂一级A排放标准,总出水口处污水的SS浓度为10mg/L。式中3.计算SS处理程度从以上两种计算方法比较得出,方法2得出的处理程度高于方法1,所以本污水处理厂的SS的处理程度为96.72%。一、污水的BOD处理程度计算(考虑水体自净能力最差情况)1.按河流中溶解氧的最低容许浓度计算(用最高温度算)1.1求出水口处DO的混合浓度\n(5-6)式中1.2求出水口处水温的混合温度(5-7)式中1.3求水温为20°C时的耗氧速率常数k1值(5-8)式中1.4求水温为20°C时的复氧速率常数k2值(5-9)\n1.5求起始点的亏氧量DO0和临界点的亏氧量DOc式中1.6求起始点的有机物浓度L0和临界时间tc式中1.7求起始点允许的20°C时BOD5的浓度式中1.8计算污水处理厂允许排放的BOD5浓度(5-13)\n式中1.9计算处理程明显的,允许排放量超过了实际排放量,这是由于小水量排入大水体。1.按河流中BOD5的最高允许浓度计算(用最小流量计算)2.1计算由污水排放口流到下游取水口处的时间式中2.2将20°C标准下河流的BOD5值L5河和河流任意时段最高允许的BOD5值LSST的数值换算成10.1°C时的数值。,(5-15)式中2.3求10.1°C时的L5eBOD5的值\n(5-16)2.4将10.1°C的换算成20°C时的BOD5值2.5计算处理程度明显的,允许排放量超过了实际排放量,这是由于小水量排入大水体。2.按二级生物处理后的水质排放标准计算根据国家《城镇污水处理厂污染物排放标准(GB18918-2002)》中规定城市二级污水处理厂一级A排放标准,总出水口处污水的BOD5浓度为10mg/L。3.计算BOD的处理浓度从以上三种计算方法可以看出,方法3得出的处理程度较高,所以本污水处理厂的BOD5的处理程度为95.16%。一、污水的氮磷处理程度计算二、污水的磷酸盐处理程度计算\n第1章污水的一级处理6.1格栅的设计计算设计内容:本设计中格栅与明渠连接,提升泵站的来水首先进入稳压井后,进入格栅渠道。格栅:设计流量Qs=0.5162m3/s,过栅流速取0.9m/s,格栅倾角600,栅前水深1.0m,栅条间隙b=0.02m。1.栅条间隙数(6-1)式中n——格栅最大间隙数个数;Q——设计流量,m3/s;α——格栅倾角,°;b——栅条间隙,m;h——栅前水深,m;v——过栅流速,m/s。设计中取α=60°,b=0.01m,v=0.9m/s,h=1.0mn===53.38个,取542.栅槽宽度(6-2)式中B——栅条槽宽度,m;S——每根格栅条宽度,m,一般采用0.005~0.01m。设计中取S=0.01m3.进水渠道渐宽部分长度\n(6-3)式中l1——进水渠道渐宽部分长度,m;B1——进水明渠宽度,m;a1——渐宽处角度,°一般采用10°~30°。设计中取B1=0.9m,a1=20°。1.出水渠道渐窄部分长度(6-4)式中l2——进水渠道渐窄部分长度,m;B1——进水明渠宽度,m;a1——渐窄处角度,°a2=a1。2.通过栅条的水头损失(6-5)式中h1——格栅水头损失,m;β——格栅条的阻力系数,取2.42;k——格栅受污物堵塞时的水头损失增大系数,一般采用k=3。3.栅后明渠的总高度H=h+h1+h2(6-6)式中H——栅后明渠的总高度,m;h2——明渠超高(m),一般采用0.3~0.5m。\n设计中取栅前明渠超高h2=0.3H=h+h1+h2=1.0+0.12+0.3=1.42m1.栅槽总长度(6-7)式中L——格栅槽总长度,m;H1——格栅明渠的深度,m。2.每日栅渣量(6-8)式中W——每日栅渣量,m3/d;W1——每日每10m3污水的栅渣量(m3/103m3污水),一般采用0.04~0.06m3/103污水。设计中取W1=0.05m3/103m3污水=1.6m3/d应采用机械清渣及皮带输送机或无输送机输送栅渣,采用机械栅渣打包机将栅渣打包,汽车运走。3.进水与出水渠道泵站污水采用DN800mm的管道进入进水渠道,设计中取进水渠道宽度B1=0.9m,进水水深h1=h=1.0m,出水渠道B2=B1=0.9m,出水水深h2=h1=1.0m。6.2沉沙池的设计计算目前采用较多的沉砂池有平流沉砂池,曝气沉砂池和旋流沉砂池,本设计选用曝气沉砂池,它是通过曝气作用使水流旋转,产生离心力去除泥砂,排除的沉砂较为清洁,处理起来方便。\n1.沉砂池有效容积(6-9)式中V——沉砂池有效容积,m3;Q——设计流量,m3/s;t——停留时间,min一般采用1~3min。设计中取t=2min2.水流断面积(6-10)式中A——水流过水断面面积,m2;v1——水平流速,m/s一般采用0.06~0.12min。设计中取v1=0.1m/s=5.162m2,取6m23.沉砂池宽度(6-11)式中B——沉砂池宽度,m;h2——沉砂池有效水深,m一般采用2~3m,宽深比一般采用1~2。设计中取h2=2m4.沉砂池长度(6-12)式中L——沉砂池长度,m。,取11m。5.每小时所需空气量\n(6-13)式中q——每小时所需空气量,m3/h;d——1m3污水所需空气量,m3/m3污水,一般采用0.1~0.2m3/m3污水。设计中取d=0.2m3/m3污水但是为了达到更好的曝气效果,根据手册推荐用量,在曝气管水下浸没深度为1.5m时,达到良好除砂效果的最大空气量为30m3/(m·h),池长为11m,所以最后取,15%为考虑到进出口条件而增长的池长。1.沉砂室所需容积(6-14)式中Q——平均流量,m3/s;X——城市污水沉砂量,m3/106m3污水,一般采用30m3/106m3污水;T——清除沉砂的间隔时间,d,一般取1~2d。设计中取T=2d,X=30m3/106m3污水,2.每个沉砂斗容积V0(6-15)式中V0——每个沉砂斗容积,m3;n——沉砂斗数量,个。3.沉砂斗上口宽度(6-16)式中a——沉砂斗上口宽度,m;h3——沉砂斗高度,m;\nα——沉砂斗壁与水平面的倾向,°,一般采用圆形沉砂池α=55°,矩形沉砂池60°;a1——沉砂斗低宽度,m,一般采用0.4~0.5m设计中取h3=1.2m,a1=0.5m,α=6001.沉砂斗容积(6-17)式中V0/——沉砂斗有效容积,m3。2.进水渠道格栅的出水通过DN800mm的管道进入沉砂池的进水渠道,然后进入沉砂池,进水渠道的流速(6-18)式中v1——进水渠道水流流速,m/s;B1——进水渠道宽度,m;H1——进水渠道水深,m。设计中取B1=1.8m,H1=0.5m3.出水装置出水采用沉砂池末端薄壁出水堰跌落出水,出水堰可保证沉砂池内的水位标高恒定,堰上水头(6-19)式中H1——堰上水头,m;\nQ1——沉砂池内的设计流量,m3/s;m——流量系数,一般采用0.4~0.5;b2——堰宽,m,等于沉砂池的宽度。设计中取m=0.4,b2=3m。出水堰后自由跌落0.15m,出水流入出水槽,出水槽宽度B2=0.8m出水槽水深h2=0.35m,水流流速v2=0.89m/s。采用出水管道在出水槽中部与出水槽连接,出水管道采用钢管,管径DN800mm,管内流速1.03m/s,水力坡度i=1.56‰。1.排砂装置采用吸砂泵排砂,吸砂泵设置在沉砂斗内,借助空气提升将沉砂排出沉砂池,吸砂泵管径DN=200mm。6.3初次沉淀池污水厂设计流量Q设=0.5162m3/s,本设计拟采用中心进水周边出水式辐流沉淀池。初次沉淀池主要对污水中以无机物为主体的比重大的固体悬浮物进行沉淀分离。大约去除SS40%~55%,同时可去除BOD5去除20~30%。6.3.1沉淀池池体设计计算1.沉淀部分有效面积(6-20)式中F——沉淀部分有效面积,m2;Q——设计流量,m3/s;q′——表面负荷,m3/(m2·h),一般采用1.5~3.0m3/(m2·h)。\n设计中取表面负荷q′=2m3/(m2·h)池数n=2则:F===464.58m21.沉淀池直径(6-21)式中D——沉淀池直径,m。,取25m2.沉淀池有效水深(6-22)式中h2——沉淀池有效水深,m;t——沉淀时间,h,一般采用1~3小时。设计中取沉淀时间t=1.5h3.污泥部分所需容积①按设计人口计算(6-23)式中V——污泥部分所需容积,m3S——每人每日污泥量,L/(人·d),一般采用0.3~0.8L/(人·d);T——两次清除污泥相隔时间,d,一般采用重力排泥时,T=1~2d,采用机械刮泥排泥时,T=0.05~0.2d;N——设计人口数,人;n——沉淀池组数。设计中S=0.5L/(人·d),采用机械刮泥排泥排泥T=0.2d②按去除水中悬浮物计算\n(6-24)式中Q——设计流量,m3/s;C1——进水悬浮物浓度,mg/l;C2——出水悬浮物浓度,mg/l,一般采用沉淀效率η=40%~60%;K2——生活污水量总变化系数;γ——污泥容重,t/m3,约为1;p0——污泥含水率。%。设计中取T=0.2d,p0=97%,η=50%,C2=(100%-50%)×C1=0.5×C1辐流沉淀池采用周边传动刮泥机,周边传动刮泥机的周边线速度为2~3m/min,将污泥推入污泥斗,然后用静水压力将污泥排出池外。1.污泥斗容积辐流沉淀池采用周边传动刮泥机,池底需做成2%的坡度,刮泥机连续转动将污泥推入污泥斗,设计中选择矩形污泥斗,污泥斗上口尺寸2m×2m,底部尺寸0.5m×0.5m,倾角为60°有效高度1.35m。(6-25)式中V1——污泥斗容积,m3;h5——污泥斗高度,m;a——污泥斗上口边长,m;a1——污泥斗底部边长,m,一般采用0.5m。2.沉淀池底部圆锥体体积(6-26)式中V2——沉淀池底部圆锥体积,m3;h4——沉淀池底部圆锥体高度,m3\nR——沉淀池半径,m。设计中取h4=0.23m,r=1m。1.沉砂斗总容积(6-27)式中V3——沉砂斗总容积,m。2.沉淀池总高度(6-28)式中H——沉淀池总高度,m;h1——沉淀池超高,m,一般采用0.3~0.5m;h3——沉淀池缓冲层高度,m,一般采用0.3m。设计中取h1=0.3m,h3=0.3m6.3.2进水集配水井设计辐流沉淀池分为两组,在沉淀池进水端设集配水井,污水在集配水井中部的配水井平均分配,然后流进每组沉淀池。1.配水井的中心管径(6-29)式中D2——配水井内中心管直径,m;v2——配水井内中心管上升流速,m/s,一般采用v2≥0.6m/s。设计中取配水井中心管内污水流速v2=1.0m/s\n,设计中取800mm;配水井直径式中v3——配水井内污水流速(m/s),一般取v=0.2~0.4m/s;D3——配水井直径,m。设计中取v3=0.2m/s,取2.00m。集水井直径取5.00m。1.进水管及配水花墙沉淀池分为两组,每组沉淀池采用中心进水,通过配水花墙和稳流罩向池四周流动。进水管道采用钢管,管径DN500mm,管内流速v=1.28m/s,水力坡度i=4.21‰,进水管道顶部设穿孔花墙处的管径为700mm。沉淀池中心管配水采用穿孔花墙配水,穿孔花墙位于沉淀池中心管上部,布置6个穿孔花墙,过孔流速(6-30)式中v3——穿孔花墙过孔流速,m/s,一般采用0.2~0.4m/s;B3——孔洞的宽度,m;h3——孔洞的高度,m;n3——孔洞的数量,个。设计中取B3=0.2m,h3=0.6m,n=8个穿孔花墙向四周辐射辐射平均布置,穿孔花墙四周设稳流罩,稳流罩直径2.0m,高2.0m,在稳流罩上平均分布φ100mm的孔洞240个,孔洞的总面积为稳流罩过水断面的15%。\n1.出水堰沉淀池出水经过双侧出水堰跌落进入集水槽,然后汇入出水管道排水集水井。出水堰采用双侧90°三角形出水堰,三角堰顶宽0.16m,深0.08m,间距0.05m,外侧三角堰距沉淀池内壁0.4m,三角堰直径为24.2m,共有362个三角堰。内侧三角堰挡渣板0.4m,三角堰直径为22.2m,共332个三角堰。两侧三角堰宽度0.6m,三角堰后自由跌落0.1~0.15m,三角堰有效水深为(6-31)式中Q1——三角堰流量,m3/s;H1——三角堰水深,m,一般采用三角堰高度的1/2~2/3。三角堰堰后自由跌落0.15m,则堰上水头损失0.187m。1.堰上负荷(6-32)式中q1——堰上负荷,L/(s·m),一般小于2.9L/(s·m);D1——三角堰出水渠道平均直径,m。2.出水挡渣板三角堰前设有出水浮渣挡渣板,利用刮泥机桁架上的浮渣刮板收集。挡渣板高出水面0.2m,伸入水下0.4m,在挡渣板旁设一个浮渣收集装置,采用管径DN300mm的排渣管排出池外。3.出水渠道出水槽设置在沉淀池四周,设置一个总出水口,双侧收集三角堰出水,出水槽宽0.6m,深0.7m,有效水深0.50m,水平流速1.03m/s,出水槽将三角堰出水汇集送入出水管道,出水管道采用钢管,管径DN500mm,v=1.28m/s,i=4.21‰。\n1.刮泥设备沉淀池采用周边转动刮泥机,周边转动刮泥机的线速度为2~3m/min,刮泥机底部设有刮泥板,将污泥推如污泥斗,刮泥机上部设有刮渣板,将浮渣刮进排渣装置。2.排泥管沉淀池采用重力排泥,排泥管管径DN150mm,排泥管伸入污泥斗底部,排泥静压头采用1.2m,连续将污泥排出池外贮泥池内。\n第1章污水的二级处理——SBR反应器7.1设计参数1.BOD-污泥负荷率SBR池在高负荷运行时,BOD-污泥负荷Ns一般采用0.1~0.4kgBOD/(kgMLSS·d)之间,本设计采取Ns=0.2kg/(kg·d)。2.曝气池内混合液污泥浓度反应池内污泥浓度X一般采用1500-5000mg/L之间,设计中取X=3000mg/L。3.排出比1/m排出比1/m指每一性情的排水量与反应池容积之比,一般采用1/4-1/2之间,本设计取1/m=1/2。4.曝气时间(7-1)式中TA—曝气时间,h;Sa—进水BOD浓度,mg/L。BOD5经过初沉池后已经去除25%。则进水BOD5=207.71×75%=155.78g/L,本设计中取为3.5小时。5.沉淀时间停止曝气后,初期沉降速度Vmax=7.4×10000tX(7-2)式中Vmax——沉降速度,m/h;t——水温,C°。当水温为10℃时,则有Vma=7.4×10000×10×3000=0.91m/h\n当水温为20℃时,则有Vma=7.4×10000×20×3000=1.82m/h沉淀时间为(7-3)式中Ts——沉淀时间,h;H——反应池内水深,m;ε——安全高度,m,一般采用0.3~0.5m;设计中取ε=0.5m,H=6m当水温为10℃时:当水温为20℃时:1.排出时间排出时间TD=2.0h。2.进水时间设计中取反应池进水时间TⅠ=2.0h。3.一个周期所需时间T=TA+TS+TD+TI(7-4)=3.5+3.8+2.0+2.0=12.0h4.曝气池个数(7-5)式中N——曝气池个数。5.每天周期数\n(7-6)式中n——每天周期次数。7.2曝气池尺寸计算1.每组曝气池的容积(7-7)式中V——每组曝气池容积,m3;2.曝气池的平面尺寸(7-8)式中F——单组曝气池的面积,m2H——曝气池的有效水深,m。本设计取为1240m设每组曝气池的池宽为20m,则池长62m3.曝气池的总高度曝气池的水深6m,超高取0.5m,则曝气池总高度H′为H′=6+0.5=6.5m7.3进出水系统1.SBR池进水设计集水井的来水通过DN800的管道送入SBR反应池,管道内的水流最大流速\n为v=1.03m/s,i=1.56‰。在每一组SBR池上设电动阀门,以便于控制池的进水量,进水管直接将来水送如曝气池内。1.SBR池出水设计SBR池采用滗水器出水,由于水量较大,本设计采用XB-1800旋转式滗水器,出水能力为1800m3/h,滗水深度为3.0m。出水管管径DN800mm。3.排泥管采用DN200的排泥管,重力排泥。7.4曝气系统的计算与设计本设计采用鼓风曝气系统1.平均时需氧量计算(7-9)式中O2——混合液需氧量(KgO2/d);a′——活性污泥微生物每代谢1kgBOD所需的氧气(kg),取为0.5;Q——污水平均流量(m3/d);Sr——被降解的有机污染物量(mg/l);b′——每1kg活性污泥每天自身氧化所需要的氧气(kg),取为0.15;V——曝气池容积(m3);Xv——MLVSS。代入各参数值得:=2269.56+2508.74=4778.30kg/d=199.10kg/h2.最大时需氧量计算=3250.87+2507.74=4758.61kg/d=239.98kg/h\n1.最大时需氧量与平均时需氧量之比2.供气量的计算采用WM-180型网状膜微孔空气扩散器,每个扩散器的服务面积0.49㎡,敷设于距池底0.2m处,淹没深度4.0m,计算温度定为30℃。查得20℃和30℃时,水中饱和溶解氧值为:Cs(20)=9.17mg/l;Cs(30)=7.63mg/l。①空气扩散器出口处的绝对压力(Pb)Pb=1.013×105+9800H(7-10)式中Pb——出口处绝对压力,PaH——扩散器淹没深度,m。设计中去H=0.4mPb=1.013×105+9800×0.4=1.405×105,Pa②空气离开曝气池池面时,氧的百分比为:(7-11)式中Ot——氧的百分比,%;EA——空气扩散器的氧转移效率。设计中取EA=12%③曝气池混合液中平均氧饱和度(按最不利的温度条件考虑)(7-12)式中Csb(30)——30°C时,鼓风曝气池内混合液溶解氧饱和度的平均值,mg/L;Cs——30°C时,在大气压力下,氧的饱和度,mg/L。\n换算为20℃条件下,脱氧清水的充氧量:(7-13)式中R——混合液需氧量,kg/h;Csb(20)——20°C时,鼓风曝气池内混合液溶解氧饱和度的平均值,mg/L;α、β——修正系数;ρ——压力修正系数;C——曝气池出口处的溶解氧,mg/L。设计中取α=0.82、β=0.95、C=2.0、ρ=1.0,平均时需氧量:R0=283.3613kg/h相应的最大时需氧量为:R0max=341.5422kg/h①曝气池平均时供气量为②最大时供气量为:③本系统空气总用量:总需氧量为9487.283m3/h,每池总需氧量为1581.214m3/h5.空气管路系统计算(选取一个SBR池)沿着池长方向靠墙设1根干管,在每根干管上设11根曝气竖管,每根竖管与池底横管相连,横管连有28根支管,每个支管上有8个曝气头。曝气池共设11条配气竖管,每根竖管的供气量为:1581.214÷11=143.747m3/h曝气池的平面面积为1240m2,每个空气扩散器的服务面积按0.49m2计,则所需空气扩散器的总数为:\n240÷0.49=2530个每根竖管上安装的空气扩散器个数为:2530÷11=230(个),实际为224个每个空气扩散器的配气量:143.747÷224=0.642m3/h根据已设的距离来布置空气管路,并将已布置的空气管路绘制成计算图,用以进行计算。选择一条从鼓风机房开始的最长的管路作为计算管段,在空气流量变化处设计算节点,统一编号后列表进行空气管路计算,计算结果见附表5。经过计算得到空气管路系统的总压力损失为:∑(h1+h2)=263.59×9.8÷1000=2.58(kPa)网状膜空气扩散器的压力损失为5.88kPa,则总压力损失为:5.88+2.58=8.46(kPa)设计中取值9.8kPa。5.空压机的选定空气扩散装置安装在距曝气池池底0.2m处,曝气池的有效水深为4.2m,空气管路内的水头损失按1.0m计,则空压机所需压力为:P=(6-0.2+1.0)×9.8=66.64(kPa)空压机供气量最大时为:Gsmax=9487.283m3/h=158.12m3/min平均时为:Gs=7871.147m3/h=131.19m3/min根据所需压力和空气量,决定采用RE-200空压机5台,该型空压机风压68.6kPa,风量53.1m3/min。正常条件下,3台工作,2台备用,高负荷时14台工作,1台备用。\n第1章污水的后续处理8.1消毒接触池的设计计算消毒接触池是采用化学方法处理水中有害微生物,以保证污水排放安全。本设计采用液氯消毒,这种方法具有效果可靠,投配设备简单,投量准确,价格便宜等优点。本设计采用两组三廊道平流式消毒接触。1.加氯量计算二级处理出水采用氯液消毒时,液氯投加量一般为5~10mg/L,本设计中液氯投加量采用8.0mg/L。每日加氯量为:(8-1)式中q——每日加氯量,kg/d;q0——液氯投加mg/L;Q——污水设计流量,m3/s。2.加氯设备液氯由真空转子加氯机加入,加氯机设计两台,采用一用一备。每小时加氯量:设计中采用ZG——型转子加氯机。3.消毒接触池容积(8-2)式中V——接触池单池容积,m3;\nQ——设计污水量,m3/s;t——消毒接触时间,h,一般采用30,min;n——池子个数。设计中取t=30min1.消毒接触池表面积(8-3)式中F——消毒接触池单池表面积,m2;h2——消毒接触池有效水深,m;设计中取h2=3.0m2.接触池长度(8-4)式中L/——消毒接触池廊道总长,m;B——接触池单廊道宽,m;设计中取B=3.0m每廊道长:,取18m长宽比:,符合要求\n1.池高(8-5)式中h1——超高,m,一般采用0.3m;h2——有效水深,m2.污泥量设经曝气处理后污水产生的污泥量为0.03l/r·d,含水率为96%,则接触池中每天产生的污泥量W为:产生的污泥由刮泥机刮至进水端,然后由排泥管送至污泥脱水机房。3.进水部分每个消毒接触池进水水管径D=500mm,v=1.28m/s,i=4.21‰。4.混合采用管道混合方式,加氯管线直接接入消毒接触池进水管,为增强混合效果,加氯点后接D=500mm的静态混合器。5.出水部分本设计采用薄壁堰出水:(1)集水渠设计流量(8-6)式中Q——集水区流量,m3/s;Qmax——设计流量,m3/s;n——消毒接触池个数;α——取1.2。则渠宽为\n(8-7)式中B——渠宽,mQ——渠道流量,m3/s;起端水深为(8-8)式中h0——起始端水深,m;B——渠道宽,m;(2)出水堰(8-9)式中H——堰上水头,m;n——消毒接触池个数;m——流量系数,一般采用0.42;b——堰宽,数值等于池宽,m。设计中取n=2,b=3.0m取自由跌落0.15m,则出水堰总水头损失为8.2污水计量设备为了提高污水厂的工作效率和运转管理水平,积累技术资料,以总结运转经验,为给处理厂的设计提供可靠的数据,必须设置计量设备。本设计采用巴\n式计量槽,其优点是水头损失小,不易发生沉淀,精确度高达95~98%。本设计流量范围0.36038~0.5162m3/s,故采用测量范围在0.080~0.900m3/s的巴式计量槽。1.巴式计量槽各部分的尺寸:(8-10)式中A1——渐缩部分长度(m);b——喉部宽度(m);A2——喉部长度(m);A3——渐扩部分长度(m);B1——上游渠道宽度(m);B2——下游渠道宽度(m)。设计中b=0.75mA1=0.5×0.75+1.2=1.58mA2=0.6mA3=0.9mB1=1.2×0.75+0.48=1.38mB2=0.75+0.3=1.05m2.计量槽总长度计量槽应设在渠道的直线段上直线段上,直线段的长度不应该小于渠道宽度的8~10倍,在计量槽上游,直线段不小于渠宽的2~3倍,下游不小于4~5倍;计量槽上游直线段长L1为:L1=3B1(8-11)式中L1——上游直线段长,m;\nB1——上游渠道宽度,m。L1=3B1=3×1.38=4.14m计量槽下游直线段长L2为:L2=5B2(8-12)式中L2——下游直线段长,m;B2——下游渠道宽度,m。L2=5B2=5×1.05=5.25m计量槽总长L:L=L1+A1+A2+A3+L2L=4.14+1.575+0.6+0.9+5.25=12.465m1.计量槽的水位当b=0.75m时:Q=1.777H11.558(8-13)式中H1——上游水深,m。当b=0.3~2.5m时,H1/H2≤0.7时为自由流;H2≤0.7×0.45=0.32m;取H2=0.35m2.渠道水力计算①上游渠道:过水断面面积A:A=B1×H1=1.38×0.45=0.62m2湿周f:f=B1+2H1=1.38+2×0.45=2.3m水力半径R:流速v:\n水力坡度i:式中n—粗糙度,一般采用0.013。①下游渠道:过水断面面积A:A=B2×H2=1.05×0.35=0.37m2湿周f:f=B2+2H2=1.05+2×0.35=1.75m水力半径R:流速v:水力坡度i:1.水厂出水管采用重力流铸铁管,流量Q=0.5162m3/s,DN=800mm,v1=1.01m/s,i=1.51‰。\n第1章污泥处理9.1污泥量计算在污水处理过程中产生大量的污泥,,污泥很不稳定,需急时处置。处置的目的在于处理厂能正常运行,有毒的物质得到及时的处置,有用的物质得到利用,减小后续处理构筑物的工作污泥中不仅有很多有毒物质而且也含有氮﹑磷﹑钾等植物营养素负荷,以便达到变害为利,综合利用,保护环境的目的。9.1.1初沉池污泥量计算由初沉池污泥计算结果可知初次沉淀池的污泥量按设计人口计算为8.33m3,按去除水中悬浮物计算为30m3。两种计算结果取较大值作为初沉池污泥量。初沉池污泥量Q1=2×5×30=300m3/d=30m3/次以每次排泥时间30min计,每次排泥量60m3/h=0.0167m3/s9.1.2剩余污泥量计算曝气池内每日增加的污泥量(9-1)式中△X——每日增长的污泥量;Sa——曝气池进水BOD浓度mg/L;Se——曝气池出水BOD浓度mg/L;Y——污泥产率系数,一般采用0.5~0.7;Q——污水平均流量m3/d;V——曝气池容积m3;\nXV——挥发性污泥浓度MLVSS,mg/L;Kd——污泥自身氧化率,一般采用0.04~0.1。根据前面计算结果,设计中取Sa=155.88mg/L;Se=10mg/L,Y=0.6,Q=31136.8m3/d,V=7433.28m3,Xv=3000mg/L,Kd=0.1△X=1050kg/d9.2污泥浓缩池计算本设计采用竖流浓缩池,浓缩来自初沉池的剩余污泥,浓缩前污泥含水率99%,浓缩后的污泥含水率为97%。1.进入每个浓缩池的污泥量设计中取污泥浓度Xr=10000mg/L2.浓缩池的有效水深h2为:h2=v×t(9-2)式中h2——浓缩池有效水深,m;t——浓缩时间,h一般采用10~16h;设计中取t=10hh2=v×t=0.0001×10×3600=3.6m3.中心进泥管面积(9-3)式中f——浓缩池中心进泥管面积,m2;Q1——中心进泥管设计流量;v0——中心进泥管流速,m/s一般采用v0≤0.03m/s设计中取v0=0.01m/s,则中心管面积f为\n1.中心进泥管直径(9-4)式中d——中心进泥管直径,m,取0.4m2.中心进泥管喇叭口与反射板之间的缝隙高度(9-5)式中h3——中心进泥管喇叭口与反射板之间的板缝高度,m;v1——污泥从中心管喇叭口与反射板之间缝隙流出速度,m/s一般采用0.02~0.03m/s;d1——喇叭口直径,m一般采用d1=1.5d0。设计中取v1=0.02m/s,d1=0.63.浓缩后分离出来的污水流量(9-6)式中q——浓缩后分离出的污水量,m/s;Q——进入浓缩池的污泥量,m3/s;P1——浓缩前污泥含水率,一般采用99%;P2——浓缩后污泥含水率,一般采用97%。(6)浓缩池水流部分面积(9-7)\n中F——浓缩池水流面积,m2;v——污水在浓缩池内上升流速,m/s,一般采用v=0.00005~0.0001m/s。设计中取v=0.00005m/s1.浓缩池的直径(9-8)式中D——浓缩池直径,m;,取为4.6m。2.浓缩后的剩余污泥量(9-9)式中Q2——浓缩后的剩余污泥量,m3/s;3.浓缩池污泥斗容积污泥斗设在浓缩池底部,采用重力排泥。(9-10)式中h5——污泥斗高度,m;α——污泥斗倾角;r——污泥斗底部半径,mR——浓缩池半径,m。设计中取α=550,r=0.25m,则斗高h5为污泥斗容积为:=\n1.污泥在泥斗中停留时间(9-11)式中V——污泥斗容积,m3;T——污泥在泥斗中的停留时间,h;2.浓缩池子总高度h=h1+h2+h3+h4+h5(9-12)式中h——浓缩池总高,m;h1——超高,取0.3m;h2——有效水深,m;h3——中心管与反射板之间高度,m;h4——缓冲层高,取0.3m;h5——泥斗高度,m。H=0.3+3.6+0.04+0.3+3.0=7.24m3.溢流堰浓缩池溢流出水经过溢流堰进入出水槽,然后汇入出水管排出。出水槽流量q=0.0008m3/s,设出水槽宽0.2m,水深0.04m,则水流流速为0.1m/s。溢流堰周长(9-13)式中c——溢流堰周长,m;D——浓缩池直径,m;b——出水槽宽,m。溢流堰采用单侧90°三角形出水堰,三角堰顶宽0.16m,宽0.08m,共有87个三角堰。三角堰流量\n(9-14)式中q0——每个三角堰流量,m3/s;h′——三角堰水深,m。三角堰后自由跌落0.10m,则出水堰水头损失为0.1068m。1.排泥管浓缩后的剩余污泥量0.004m3/s,泥量很少,采用间歇排泥方式,管径采用DN=100mm,来自SBR池的污泥经污泥提升泵提升后由浓缩池上部中心管进入,经过喇叭口,进入浓缩池,经过浓缩后的污泥由污泥斗下部的排泥管排出。9.3贮泥池设计计算本设计采用矩形贮泥池,贮存来自初沉池和SBR池的污泥量。1.贮泥池设计进泥量Q=Q1+Q2式中Q——每日生产的污泥量,m3/d;Q1——初沉池污泥量,m3/d;Q2——浓缩后的剩余污泥量,m3/d。由前面计算可知Q1=300m3/d,Q2=34.56m3/d。每日产生的污泥量Q=300+34.56=334.56m3/d2.贮泥池容积(9-12)式中V——贮泥池计算容积,m3;Q——每日产生的污泥量,m3/d;t——贮泥时间,h一般采用8~12小时;\nn——贮泥池个数。设计中t=8h,n=1贮泥池设计容积(9-13)(9-14)式中V——贮泥池容积,m3;h2——贮泥池有效深度,m;h3——污泥斗的高度,m;a——污泥贮泥边长,m;b——污泥斗底边长,m;α——污泥斗倾角,一般采用60°设计中取a=5.5m,h2=3.0m,污泥斗低为正方形,边长b=2.0m。>111.52m3符合要求1.贮泥池高度:h=h1+h2+h3式中h——污泥贮泥池高度,m;h1——超高,一般采用0.3m;h2——污泥贮泥池有效深度,m;h3——污泥斗高,m;h=0.3+3.0+3.0=6.3m\n9.4消化池设计计算污泥的厌氧消化是为了使污泥中的有机物质,变为稳定的腐殖质,同时可以减少污泥体积,改善污泥的性质,使之易脱水,破坏和控制致病微生物,并获得有用的副产品,如沼气。本设计采用固定盖式,两极消化,一级消化污泥投配率为5%,二级消化污泥投配率为10%,消化温度330~350C,一级消化池进行加温搅拌,二级消化池不加热,不搅拌,利用一级消化池的余温。9.4.1容积计算1.一级消化池容积(9-15)式中V——一级消化池容积,m3;Q——污泥量,m3/d;P——投配率%,中温消化时一级消化池一般采用0.5%~8%;n——消化池个数。设计中取P=0.05,Q=334.56m3/d,采用两组一级消化池,则每个池子的有效容积2.各部分尺寸的确定①消化池直径D:设计中D取19m②集气罩直径d1:采用2m③池底下锥底直径d2:采用2m④集气罩高度h1:采用2m⑤上锥体高度h2\n(9-16)式中α1——上椎体倾角,一般采用15°~30°设计中取α1=200,设计中取3.0m①消化池柱体高度h3=10m②下锥体高度h4式中α2——下椎体倾角,一般采用5°~15°。设计中取α2=10°③则消化池总高度为H=h1+h2+h3+h4=2+3+10+1.5=16.5m总高度和圆柱直径的比例:3.各部分容积集气罩的容积V1为:=6.28m3弓形部分容积V2为:=433.92m3圆柱部分容积V3为:=2833.85m3下锥体部分容积V4为:=158.18m3则消化池的有效容积V0为:V0=V2+V3+V4\n=443.92+2833.85+158.18=3435.95>3345.6符合要求3.二极消化池总容积为:(9-15)式中V——二级消化池容积,m3;Q——污泥量,m3/d;P——投配率%,二级消化一般采用10%;n——消化池个数。设计中取P=0.1,Q=334.56m3/d,采用一组二级消化池,则池子的有效容积二级消化池容积与一级消化池相同,各部分尺寸同一级消化池。9.4.2平面尺寸计算1.消化池各部分表面积计算集气罩表面积F1为:(9-16)池顶表面积F2为:F2=(9-17)\n池盖表面积F1+F2=15.7+43.20=58.90m21.池壁表面积为:F3=π×D×h5=3.14×19×6=357.96m2(地面以上部分)F4=π×D×h6=3.14×19×4=238.64m2(地面以下部分)2.池底表面积:(9-18)9.4.3消化池热工计算1.提高新鲜污泥温度的耗热量:中温消化温度TD=35°C,新鲜污泥平均温度Ts为17.3°C,每一座一级消化池投配的最大生污泥量为:V″=3345.6×5%=167.28m3/d全年的平均耗热量(9-19)式中Q1——提高污泥温度所需平均耗热量,kcal/h;TD——中温消化温度,°C;Ts——新鲜污泥平均温度,为°C;=kcal/h最大耗热量为(9-20)式中Q1MAX——提高污泥温度所需最大耗热量,kcal/h;TS′——新鲜污泥日平均最低温度,°C。设计中取TS′=120C\n2.消化池池体的耗热量:①盖部分全年平均耗热量为:Q2=F2·K2·(TD-TA)×1.2(9-21)式中Q2——池盖平均耗热量,kcal/hF2——池盖表面积,m2;K2——池盖传热系数,kcal/(m2·h·°C);TA——室外大气平均温度,°C;TA′——冬季室外计算温度,°C设计中取TA=110C,TA/=-120C,K2=0.7kcal/(m2·h·0C)Q2=58.9×0.7×(35-11)×1.2=1187.42kcal/h最大耗热量Q2MAX=F2·K2·(TD-TA′)×1.2=58.9×(35+12)×1.2=2325.37kcal/h②池壁在地面以上部分年平均耗热量Q3=F3·K3·(TD-TA)×1.2式中Q3——地面上池壁平均耗热量,kcal/h;F3——地面上池壁表面积,m2K3——池壁传热系数,kcal/(m2·h·°C);设计中取K3=0.6kcal/(m2·h·0C)Q3=357.96×0.6×(35-11)×1.2=6185.55最大耗热量为Q3max=F3·K3·(TD-TA′)×1.2=357.96×0.6×(35+12)×1.2=12113.37kcal/h③池壁在地面以下部分年平均耗热量\nQ4=F4·K4·(TD-TB)×1.2式中Q4——地面下池壁平均耗热量,kcal/h;F4——地面上池壁表面积,m2K4——池壁传热系数,kcal/(m2·h·°C);TB——室外大气平均温度,°C;TB′——冬季室外计算温度,°C。设计中取K4=0.45kcal/(m2·h·0C),TB=11°C,TB′=3.2°C。Q4=F4·K4·(TD-TB)×1.2=238.64×0.45×(35-11)×1.2=3092.77kcal/h最大耗热量为Q4max=F4·K4·(TD-TB′)×1.2=238.64×0.45×(35-3.2)×1.2=4097.93kcal/h①池底部分全年平均耗热量为Q5=F5·K5·(TD-TB)×1.2式中Q5——地面下池壁平均耗热量,kcal/h;F5——地面上池壁表面积,m2K5——池壁传热系数,kcal/(m2·h·°C)。设计中取K5=0.45kcal/(m2·h·0C)Q5=285.51×0.45×(35-11)×1.2=3700.21kcal/h最大耗热量为:Q5max=F5·K5·(TD-TB′)×1.2=285.51×0.45×(35-3.2)×1.2=4902.78kcal/h②每座消化池池体年平均耗热量平均耗热量Q0=Q2+Q3+Q4+Q5(9-22)Q0=1187.42+6185.55+3092.77+3700.21=14165.95kcal/h最大耗热量\nQ0max=Q2max+Q3max+Q4max+Q5maxQ0max=2325.37+12113.37+4097.93+4902.78=23439.45kcal/h3.消化池总耗热量全年平均耗热量∑Q=Q0+Q1=+14165.95=.95kcal/h最大耗热量为:∑Qmax=Q1max+Q0max=+23439.45=.45kcal/h4.消化池保温结构厚度的计算:①池盖保温厚度计算(9-23)式中δG盖——池盖保温材料的厚度,mm;δG——消化池池盖混凝土结构层厚度,mm;λG——钢筋混凝土的导热系数,kcal/(m·h·°C);λB——保温材料导热系数,kcal/(m·h·°C);K2——池盖传热系数,kcal/(m·h·°C)设计中δG=250mm,λG=1.33kcal/(m·h·°C),保温层采用聚氨酯硬质泡沫塑料,λB=0.02kcal/(m·h·°C),K2=0.7kcal/(m·h·°C)δG盖子==0.025m=25mm②池壁保温层厚度的计算式中K3——池壁传热系数kcal/(m·h·°C)设计中取δG=400mm,K3=0.6kcal/(m·h·°C,采用聚氨酯硬质泡沫塑料作为保温材料。\n池壁在地面以上的保温材料延伸到地面以下的深度为冻深加0.5m,即延伸到地面以下1.7m。①池壁在地面以下的部分以土壤作为保温层时,其最小厚度的核算:土壤导热系数为λB=1.0kcal/(m·h·°C),K5=0.45kcal/(m·h·°C)设消化池池壁在地面以下的混凝土结构厚度为δG=400mm,则土壤的最小厚度保温可以满足要求,故可不加其他的保温措施。②池底以下土壤作为保温层,其最小厚度的核算:消化池池底混凝土结构厚度为δG=700mm,则保温厚度池盖﹑池壁保温材料采用聚氨酯硬质泡沫塑料,其厚度经计算分别为25mm及27mm,均按27mm计,乘以1.3的修正系数,采用50mm,池底保温材料厚度亦取50mm。二级消化池的保温结构及厚度均与一级消化池相同。3.交换器的计算消化池的加热,采用池外套管式泥—水热交换器。全天均匀投配生污泥在进入一级消化池之前,与回流的一级消化池污泥先进行混合后再进入热交换器,其比例为1:2,则生污泥量为:\n回流的消化污泥量为:Qs2=6.97×2=13.94m3/h进入热交换器的总污泥量为:Qs=Qs1+Qs2=13.94+6.97=20.91m3/h取生污泥的日平均最低温度为Ts=120C,生污泥与消化污泥混合后的温度为:℃热交换器的套管长度,按下式计算:L=×1.2(9-24)式中L——套管总长,m;QMAX——污泥消化池最大总耗热量,kcal/h;K——热交换器传热系数kcal/(m·h·°C),一般采用600kcal/(m·h·°C);△Tm——平均温度的对数,°C。设计中取内管管径D1选用DN60的钢管外管管径,D2采用DN100铸铁管,则污泥在内管中的流速(9-25)=2.0m/s符合要求ΔTm:平均温差(9-26)式中ΔT1——热交换器入口的污泥温度(Ts)和出口的热水温度(Tw′)之差;ΔT2——为热交换器出口的污泥温度(Ts′)和入口的热水温度(Tw\n)之差。污泥循环流量Qs=20.91m3/h,(9-27)设计中热交换器的入口热水水温Tω=85°C,Tω-T′采用10°C,Tω′=75°C。则所需要的热水循环量(9-28)核算内外管之间热水的流速:(9-29)ΔT1=∣Tω′-Ts∣=∣27.33-75∣=47.67°CΔT2=∣Tω′-Ts∣=∣36.07-85∣=48.93°C(9-30)=48.30°C每座消化池的套管式泥—水热交换器的总长度为:\n设每根长4m,则其根数为:根,取8根。9.4.4混合搅拌设备1.沼气混合搅拌计算消化池的混合搅拌采用多路曝气管式(气通式)沼气搅拌。多路曝气管的竖管口延伸至距池底1.5m,呈环状布置。①搅拌用气量(9-31)式中q——单池搅拌用气量,m3/s;q0——搅拌单位用气量,m3/min·1000m3一般采用5~7m3/min·1000m3;V——消化池有效容积,m3。设计中取q0=6m3/min·1000m3②沼气曝气管直径的选择(9-31)式中A——沼气立管的总面积,m2;v——管内沼气流速,m/s一般采用7~15m/s。设计中取v=11m/s,则所需立管的总面积设计中选用立管直径为DN=70mm,每根断面积为0.00385m2。所需立管的总根数为,取8根\n核算立管的实际流速为,符合要求9.4.5消化后污泥量计算1.一级消化后的污泥量一级消化降解了部分可消化有机物,同时一级消化不排除上清液,消化前后污泥含水不变,有下式成立V2P2=V1P1(9-32)V2(1-P2)=V1(1-P1)(1-PVRdm)(9-33)式中V1——一级消化前生污泥量,m3/d;V2——二级消化前生污泥量,m3/d;P1——生污泥含水率,%;P2——一级消化污泥含水率%;Pv——生污泥中含有的有机物含量,%一般采用65%;Rd——污泥可消化程度,%一般采用50%;m——一级消化占可消化程度的比例,%一般采用70%~80%。设计中取V1=334.56m3/d,P1=97%,m=80%,经计算V2=331.95P2=97.76%2.二级消化后的污泥量消化浓缩后的污泥含水率由一级消化前的%97降至二级消化后的%95,每日二级消化池排除污泥(9-34)式中V1——生污泥量,m3/d;V3——二级消化后污泥量,m3/d;P1——生污泥含水率,%;\nP3——二级消化后的污泥含水率,%;设计中P1=97%,P3=95%,V1=334.56m3/d1.二级消化池上清液排放量整个消化过程中产生的上清液由二级消化池排除V′=V1P1-V3P3(9-35)V′=334.56×0.97-135.50×0.95=195.80m3/d。9.4.6沼气产量1.消化池降解的污泥量X=(1-P)V1PVRd(9-35)式中X——消化池降解的污泥量,kg/d;P——生污泥含水率,%;V1——生污泥含量,m3/d;PV——生污泥有机含量,一般采用65%;Rd——污泥可消化程度,一般采用50%。设计中P=97%,V1=334.56m3/dX=(1-0.97)×334.56×0.65×0.5×1000=3261.96m3/d。2.消化池的产气量q=aX(9-36)式中q——消化池沼气产量,m3/d;a——污泥沼气产率,m3/kg污泥,一般采用0.75~1.10m3/kg污泥。设计中取a=0.9m3/kg污泥,每日产气量q=0.9×3261.96=2935.8m3/d=0.034m3/s\n9.4.7一级消化池的管道系统1.进泥管(9-37)式中Q——进泥管投泥量,m3/d;Q1——投加生污泥量,m3/d;Q2——循环污泥量,m3/d,一般采用Q2=(2~4)Q1n——消化池个数。设计中取Q2=2Q1,n=2。适当采用间歇用行,每日运行12小时。m3/s(9-38)式中v1——管内污泥流速,m/s;D1——投配管直径,m;设计中为防止污泥堵塞,设计中取D1=150mm2.排泥管为了防止消化池中产生正负压变化,在投泥的同时还要进行排泥。式中Q——一级消化池的排泥量,m3/d;v2——管内污泥流速,m/s;D2——排泥管直径,mm。设计中为防止堵塞,设计中取D2=150mm,一级消化池单池排泥量Q2=167.28m3/d,采用间歇排放,运行时间3h,用闸阀控制排泥,出泥口设在池\n底中央处。1.循环出泥管式中Q2——循环污泥量,m3/d;v3——管内污泥流速,m/s;D3——循环污出泥管直径,mm。设计中取Q2=2Q1,n=2,采用间歇运行,每日运行12h设计中为防止堵塞,设计中取D2=150mm2.取样管在池中不同位置设置取样管,共设4根,DN=50mm。3.沼气集气管的设计计算Q=Q1+Q2(9-39)(9-40)(9-41)式中Q——集气管沼气流量,m3/s;Q1——消化池产生的沼气流量,m3/s;Q2——搅拌所需沼气流量,m3/s;q——每日产生沼气量,m3/d;a——一级消化池产气量的比率,%一般采用80%;n——一级消化池数量;\nv——集气管内沼气流速,m3/s;D——沼气集气管直径,m;设计中取Q2=0.33m3/s,q=2935.8m3/d,沼气管直径DN=300mm,n=2Q=0.0136+0.33=0.343m3/s,符合要求设计中取最高时产气量为平均产气量的2倍,最高时产气量Qmax=2Q1+Q2(9-42)Qmax=0.0136×2+0.33=0.357m2/s1.溢流管的设计计算为防止池内液为超过限定的最高液位,池内应该设置溢流管,采用溢流管管径DN=200mm。溢流管水封高度采用0.8m,水封的作用是防止池内沼气沿溢流管泄露。9.4.8二级消化池的管道系统1.进泥管二级消化池采用一座,采用间歇进泥的运行方式,每日进泥时间3h。(9-43)(9-44)式中Q1——进泥管流量,m3/s;V2——二级消化池进泥量,m3/d;n——消化池数量;t1——二级消化池每日进泥时间,h;v1——管内污泥流速,m/s;\nD1——二级消化池进泥管直径,mm。设计中取D1=200mm,V2=334.56m3/d,n=1,t=3h1.二级消化池采用间歇排泥,排泥时间3h(9-45)(9-46)式中Q2——排泥管流量,m3/d;v2——管内污泥流速,m/s;D2——二级消化池排泥管直径,mm设计中取D2=150mm,V2=135.50m3/d,n=1,t=3h2.沼气管(9-47)(9-48)式中Q——二级消化池沼气流量,m3/s;q——每日产生沼气量,m3/d;b——二级消化池产气量的比率,%一般采用20%;n——二级消化池数量;v——管内沼气流速,m3/s;D——沼气集气管直径,m;设计中取Q2=0.33m3/s,q=2935.8m3/d,沼气管直径DN=100mm,n=1\n设计中取最高时产气量为平均产气量的2倍,最高时产气量Qmax=0.007×2=0.014m3/s1.上清液排放管(9-49)(9-50)式中V′——二级消化池上清液排放量,m3/d;Q——上清液排管设计流量,m3/s;n——二级消化池数量;v——上清液排放流速,m3/s;D——上清液排管直径,m;t——二级消化池排上清液时间,h,一般采用进泥时间。设计中取V′=195.80m3/d,t=2h,管径DN=200mm2.取样管同一级消化池9.4.9贮气柜设计中采用单级底压浮盖式贮气柜。1.贮气柜最大调节容积V=q×c(9-51)\n式中V——最大调节容积,m3;q——每日产气量,m3/d;c——容积调节比率,%一般采用25%~40。设计中q=2935.8m3/d,c=35%V=2935.8×0.35=1027.53m31.贮气柜外形尺寸V=H(9-52)式中V——最大调节容量,m3;D——贮气柜直径,m;n——贮气柜数量;H——贮气柜调节高度,m;设计中D=1.5H,n=2,V=1027.53m3,设计中取8.3m。D=1.5H,D=1.5×8.3=10.45m设计中取12.5m。9.4.10沼气压缩机1.沼气量(9-53)式中Q——搅拌沼气用量,m3/min;n——一级消化池数量q——单池搅拌沼气用量,m3/s;设计中取q=0.33m3/s,n=22.排气压力(9-54)\n式中h1——沼气管淹没深度,m;h2——贮气柜水封压力,m;h3——管道压力损失,m。设计中取h1=11.5m,h2=0.4m,h3=5.0mH=16.9m水柱,设计中取20m水柱9.5污泥脱水9.5.1污泥脱水量计算污水处理过程中所产生的污泥,一般是带水的粒状或絮状物质的疏松结构,体积庞大,因此,在污泥处理和处置中都需要降低其含水率,从而大大缩小污泥体积。脱水后的污泥量(9-55)M=Q(1-P2)×1000(9-56)式中Q——脱水后的污泥量,m3/d;Q0——脱水前的污泥量,m3/d;P1——脱水前污泥含水率,%;P2——脱水后的污泥含水率,%;M——脱水后污泥干重,kg/d;设计中Q0=195.80m3/d,P1=95%,P2=75%。M=39.16×0.25×1000=9790kg/d污泥脱水后形成的泥饼用车运走,分离液返回处理系统前端进行处理。\n9.5.2脱水机器的选择设计中选用DY——3000型带式压滤机,其只要技术指标为,干污泥产量600kg/h,泥饼含水率75%,絮凝剂聚丙烯胺投标量按干污泥量的2.0‰。设计中共采用3台带式压滤机,其中2用1备。工作周期定为12小时。所以每台处理的泥量为:m=600×12×2=14400kg/d,可满足要求。\n第1章污水处理厂的布置10.1污水厂的平面布置污水处理厂的平面布置包括处理构筑物、办公楼、化验室及其他辅助建筑物以及各种管道渠道、道路、绿化带的布置。在进行污水处理处理厂厂区平面规划、布置时,应考虑的一般原则阐述如下。本设计污水处理厂的具体平面布置见城市污水厂总平面图。10.1.1各处理单元构筑物的平面布置处理构筑物是污水处理厂的主体构筑物,在做平面布置时,应根据各构筑物的功能要求和水力要求,结合地形和地质条件,确定它们在厂区内平面的位置,对此,应考虑:1.贯通、连接各处理构筑物之间的管、渠便捷、直通,避免迂回曲折;2.土方量作到基本平衡,并避免劣质土壤地段;3.在处理构筑物之间,应保持一定的间距,以保证敷设连接管、渠的要求,一般的间距可取值5~10m,某些有特殊要求的构筑物,如污泥消化池、消化气贮罐等,其间距应按有关规定确定;4.各处理构筑物在平面布置上,应考虑适当紧凑。10.1.2管道及渠道的平面布置1.在各处理构筑物之间,设有贯通、连接的管、渠。此外,还应设有能使各处理构筑物独立运行的管、渠,当某一处理构筑物因故停止工作时,使其后接处理构筑物,仍能够保持正常的运行。2.应设超越全部处理构筑物,直接排放水体的超越管。\n3.在厂区内还设有:给水管、空气管、消化气管、蒸汽管以及输配电线路。这些管线有的敷设在地下,但大部都在地上,对其安排,既要便于施工和维护管理,但也要紧凑,少占用地,也可以考虑采用架空的方式敷设。污水处理厂内各种管渠应全面安排,避免相互干扰,管道复杂时可设置管廊,在污水处理厂厂区内,应有完善的雨水管道系统,必要时应设置防洪沟渠。10.1.3附属建筑物污水处理厂内的辅助建筑物有:泵房、鼓风机房、办公室、集中控制室、水质分析化验室、变电所、机修、仓库、食堂等。他们是污水处理厂不可缺少的组成部分。有可能时,可设立试验车间,以不断研究与改进污水处理技术。辅助建筑物的位置应根据方便、安全等原则确定。如鼓风机房应设于曝气池附近,以节省管道与动力;变电所宜设于耗电量大的构筑物附近等。化验室应远离机器间和污泥干化场,以保证良好的工作条件。办公室、化验室等均应与处理构筑物保持适当距离,并应位于处理构筑物的夏季主风向的上风向处。操作工人的值班室应尽量布置在使工人能够便于观察个处理构筑物运行情况的位置。在污水处理厂内应广为植树绿化美化厂区,改善卫生条件,改变人们对污水处理厂“不卫生”的传统看法。按规定,污水处理厂厂区的绿化面积不得少于30%。在污水处理厂内,应合理的修筑道路,方便运输;应设置通向各处理构筑物和辅助建筑物的必要通道,通道的设计应符合如下要求:1.主要车行道的宽度:单车道为:3.5m,双车道为6~7m.并应有回车道;2.车道的转弯半径不宜小于6m.3.人行道的宽度为:1.5~2m。4.通向高架构筑物的扶梯倾角不宜大于45度;5.天桥宽度不宜小于1m。\n10.2污水厂的高程布置10.2.1污水的高程布置污水处理工程的污水处理流程高程布置的主要任务是确定各处理构筑物的泵房的标高,确定各处理构筑物之间联结灌渠的尺寸及其标高;通过计算确定各部位的水面标高,从而使污水能够在各处理构筑物之间顺畅的流动,保证污水处理工程的正常运行。为了降低运行费用和便于维护管理,污水在处理构筑物之间的流动,以按重力流考虑为宜,并设计选择一条距离最长,水头损失最大的流程进行水力计算。计算水头损失时,以污水厂设计流量作为构筑物和管渠的设计流量。水力计算参考以接纳水体的最高水位作为起点,逆污水处理流程向上倒推计算,以使处理后污水在洪水季节能自流排出,而水泵需要的扬程也较小,运行费用也较低。同时也考虑构筑物的挖土深度不宜过大,以免土建投资过大而增加施工上的困难。污水高程计算的水头损失包括:1.污水流经各处理构筑物的水头损失各种处理构筑物(设备)的水头损失和构筑物中集配水渠的水头损失在构筑物的设计计算中已经计算过,此处从略。2.连接管渠的水头损失计算为简化计算,认为水流为均匀流。管渠的水头损失主要有沿程水头损失和局部水头损失。(1)沿程水头损失hf=(4-1)式中v——水流速度(m/s);L——管段或渠道长度(m);\nC——谢才系数,;R——水力半径(m);n——管壁粗糙系数,该值根据管渠材料而定。(2)局部水头损失(4-2)式中——局部阻力系数可参考《给水排水设计手册》取值;v——水流速度(m/s);g——重力加速度(m/s2)。由于矩形渠道水头损失的水力计算表资料较为缺乏,故用上式进行计算;但铸铁管道的水力计算可查《给水排水设计手册》来进行计算。(3)污水流经量水设备的水头损失污水高程布置应该综合考虑污水高程布置上的土方平衡,先确定曝气池水面标高,再由曝气池向两边推算其他构筑物高程污水处理流程高程计算见附录6。10.2.2污泥的高程布置由于目前有关污泥水力特性的研究还不够,因此污泥管道的计算,目前主要采用权宜的经验公式或实验资料。这些经验公式及计算图表极不完善,并有条件限制,所以本次设计则根据经验数值进行。设计污水厂内的污泥输送为重力管道,坡度常用0.01~0.02,最小管径为200mm,中途设置清通口,以便在堵塞时用机械清通或高压水冲洗。局部水头损失按沿程水头损失的30%计算。各构筑物的污泥水头损失取经验值。污泥高程布置应该:1.由初沉池液面高程推算贮泥池液面高程,再由贮泥池液面高程反推浓缩池液面高程;\n1.由一级消化池高程再推算二级消化池高程和脱水机房高程;2.确定曝气池至浓缩池的污泥泵提升高度;3.确定贮泥池至一级消化池的污泥泵提升高度。污泥处理构筑物高程计算见附录7。10.3土建与公共工程10.3.1土建工程污水处理厂所在地层结构简单,岩土性质均匀,为亚粘土无不良地质现象。工程地质条件可以满注各种构(建)筑物的要求,不必对地基进行特殊。本设计中,所有构筑物均为钢筋混凝土结构,以提高池体的防渗能力;附属建筑均采用砖混结构,包括综合办公楼、维修间、仓库、食堂、浴室、变电所、锅炉房、车库、传达室、纪律件、鼓风机房、中心控制室等。回流污泥泵房底下为钢筋混凝土结构,地上为砖混结构;污泥脱水机房为框架结构。10.3.2公共工程1.供电污水处理厂与污泥处理系统合计用电负荷表见表10-1:表10-1用电负荷计算表序号设备名称单机用电量负荷/kW设备数量总用电负荷/KW备注1格栅除污机0.7521.52污水泵4541353用1备3吸砂泵5.52114砂水分离器3.713.7\n5刮泥机2.224.46鼓风机9052703用2备7污泥提升泵5.54111用1备8刮吸泥机2.224.49加氯机2.248.810污泥泵302301用1备11带式压滤机8.828.81用1备12投药泵7.521513照明101014其他202015总计582.61.自动控制与监测本工程拟采用现代微机管理控制系统,对污水处理工艺中的各环节进行自动控制、自动监测及显示,从而达到处理效果好、运行经济、减少劳动强度、节省人力和提高效益的目的。设计方案采用PLC总线工业控制机作为自动控制系统的主机,另配一套数据采集技术处控制接口硬件并通过软件编程对各个设备进行先后有序协调统一的监测和管理,从而建立一套完善的微机自动监测与控制。2.供水本污水处理厂每日需水约100m3,主要用于生活饮用、加氯机、污泥脱水机、绿化及冲洗地面,水源引自市政自来水管网。今后拟将处理厂最后出水进行深度处理后,作为非饮用水回用。\n第1章污水处理厂投资估算与技术经济评价11.1投资估算11.1.1估算范围本次投资估算包括污水处理工程各构筑物、污泥处理各构筑物、其它附属建筑工程、公用工程、厂区内管线、道路、绿化等,还包括部分场外工程(供电线路、通讯线路、临时道路等)。11.1.2编制依据本工程依据《全国统一市政工程预算定额》的标准结合本工艺设计方案进行计算。11.1.3投资估算本工程的投资估算表见附表。11.2劳动定员11.2.1生产组织污水处理厂隶属于公用事业主管部门,生产受环保部门监督。根据国家《城镇污水厂和附属设备设计标准》(CJJ131—89),结合该市具体情况,设立如下机构和人员。\n生产机构:包括生产科、技术科、动力科、机修科与化验科。管理科室:设办公室、财务科、经营科、人保科等。技术人员配备专业:给排水(或环境工程)、电气、机械、工业自动化等。生产工人配备以下工种:运转工、机修工、电工、仪表工、泥(木)工、司机、杂工等。11.2.2劳动定员根据《城市污水处理工程项目建设标准》,本水厂建设规模为Ⅳ类,取人员32人,其中生产工人24人,辅助生产人员3人,后勤人员2人,行政技术管理人员3人。11.2.3人员培训为使本厂建成后高效运转,主业技术人员和技术工人应在国内和与本厂工艺类似,且运行管理好的城市污水处理厂进行实践培训。11.3运行费用和成本核算11.3.1成本估算的有关单价1.电价:基本电价为9.0元/(KVA/月),电表读值综合电价为0.7元/(kWh);2.工资福利:每人每年2.4万元/(人每年);3.高分子絮凝剂:1.9万元/t4.液氯:0.08万元/t5.混凝剂及助凝剂:0.1万元/t6维修大修率:大修提成率2.4%,基本折旧率:5.3%。维护综合费率:\n1.0%。11.3.2运行成本估算1.动力费(1)格栅除污机每天工作4h:1.5×4=6.0KWh(2)污水泵每天工作24h:225×24=5400KWh(3)吸砂泵每天工作1h:11×1=11KWh(4)砂水分离器每天工作1h:3.7×1=3.7KWh(5)刮泥机每天工作1h:4.4×1=4.4KWh(6)鼓风机每天工作24h:165×24=3960KWh(7)污泥回流泵每天工作24h:74×24=1776KWh(8)吸泥机每天工作24h:4.4×24=105.6KWh(9)加氯机每天工作4h:8.8×4=39.6KWh(10)污泥泵每天工作24h:15×24=360KWh(11)脱水机每天工作20h:8.8×20=176KWh(12)投药泵每天工作24h:\n15×24=360KWh(13)照明与其他用电合计:240KWh合计每日用电量:11842.3KWh电表综合用电价:11842.3×0.5=5921.15元/d每日电贴(元/d):5921.15/380×30×9×1/30=140每月电费:.5元。每年电费:218.2万元。2.工资福利费全厂职工共29人,共计费用29×2.4=69.6万元3.水费水厂每天用水100立方米,水费100×365×1.0=36500元=3.65万元4.药剂费万元/年5.运费每天外运含水率75%的湿泥28.98m3。运价为0.4元/(t×km),费用为:28.98×0.4×10×365=4210.8=4.21万元/年6.维护修理费折旧基金及大修理基金提成费=SP(11-1)式中S——固定资产总值(万元)P——综合折旧率,包括基本折旧率和大修基金提成(%)E6=6348.84×(0.053+0.024)=488.86万7.日常检修维护费日常检修维护费=S×1%(11-2)E7=6348.84×0.01=63.49万8.其他费用\n包括税款、流动基金、行政管理、辅助材料等,其费用为上述费用总和乘以综合费率。综合费率一般取10%。11.3.3运行成本核算年成本费用=(218.2+69.6+3.65+4.21+3.73+488.86+63.49)×1.1=936.914万。年流量:44599.68×365=.2m3单位废水处理成本为:/.2=0.58元/m3\n致谢经过四个月的辛勤劳动,我终于完成了毕业设计。回顾这几个月的设计历程,我从一开始对设计的无从下手到最后对设计中许多重要细节的深入理解,这一转变首先我诚挚的感谢我的指导老师吕教授、赫教授、张教授。在整个设计过程中,他不辞辛苦的为我们答疑,对我们进行指导,给了我们很多帮助。为了帮助我们的毕业设计准确深刻,三位老师经常关注我们的设计进程,并针对其中的问题给了我们很多改进的意见,令我受益匪浅。在平时的接触过程中,我深深的为老师们严谨的科学态度所影响,令我在平时的设计中严格要求自己。接着我要对设计中给过我很大帮助的老师们致以真心的感谢。他(她)们交给了我很多课本上没有的知识,拓宽了我的知识面,使我在走向工作岗位前,获得了很多工程知识。最后对所有在设计过程中给过我帮助的老师们,同学们致以诚挚的谢意和良好的祝愿。谢谢!2007.7\n参考文献【1】杜茂安,韩洪军主编.《水源工程与管道系统设计计算》.北京:中国建筑工业出版社,2002【2】严煦世,刘遂庆主编.《给水排水管道系统》.北京:中国建筑工业出版社,2002【3】孙惠修主编.《排水工程(上册)》.北京:中国建筑工业出版社,1999【4】张景成,张立秋主编.《水泵与水泵站》.哈尔滨:哈尔滨工业大学出版社,2003【5】韩洪军主编.《污水处理构筑物设计与计算》.哈尔滨:哈尔滨从业大学出版社,2005【6】韩洪军,杜茂安主编.《水处理工程设计计算》.北京:中国建筑工业出版社,2006【7】李圭白,张杰主编.《水质工程学》.北京:中国建筑工业出版社,2005【8】《室外排水设计规范》GB50014-2006【9】《地面水环境质量》标准GB3838-88【10】《污水综合排放标准》GB8978—96【11】《城市污水处理厂污水、污泥排放标准》CJ3025—93【12】《给水排水设计手册》第1、5、10、11、12分册.北京:中国建筑工业出版社,2001【13】《污水除磷脱氮技术研究与实践》P174-178【14】《国外环境科学技术》1991第3期P45-49【15】《给水排水设计手册》续册第1、2分册.北京:中国建筑工业出版社,2001【16】L.D.Benefield,C.W.Randall.BiologicalProcessDesignforWastewatertreatment.Prentice-Hall,Inc,EnglewoodCliffs,1980【17】Metcalf,Eddy.WatewaterEngineeringTreatmentandReuse(ForthEdition).TsingHuaUniversityPress,2002\n【18】RLIrvine.PeriodicProcessforinSituAndOn-siteBioremedationofLeachaterandSoils[J].WatSciTech,1993,(7~8):97~104.【19】Baikun.Li,ShannonIrvin.ThecomparisonofalkalinityandORPasindicatorsfornitrificationanddenitrificationinasequencingbatchreactor(SBR).BiochemicalEngineeringJournal.34(2007)248–255\n附录1排水管网方案A计算表*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------40-418.402.330.002.332.305.370.000.0041-4214.003.890.006.222.2113.740.000.0042-4315.404.280.0010.502.0821.890.000.0043-4415.404.280.0014.782.0129.670.000.0044-4513.303.690.0018.471.9636.190.000.0045-4616.104.470.0022.941.9143.890.000.0046-4711.903.310.0026.251.8849.480.000.0047-4811.203.110.0029.361.8654.660.000.00=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------40-41260.05.373003.000.4560.2230.000041-42260.013.743003.000.5970.3620.000042-43260.021.893502.280.6070.4010.000043-44240.029.673501.920.6170.5000.000044-45260.036.193501.770.6270.5790.000045-46200.043.894001.610.6370.5390.000046-47200.049.484001.560.6470.5850.000047-48260.054.664001.540.6570.6300.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11\n-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------40-410.780101.90101.60099.94399.161.9562.43741-420.780101.60101.27899.12198.342.4792.93742-430.592101.28101.00098.31097.722.9683.28343-440.461101.00100.61597.68397.223.3173.39344-450.459100.61100.21297.19496.743.4213.47745-460.322100.2199.93296.72296.403.4903.53246-470.31299.9399.76096.38296.073.5503.69147-480.39999.7699.54696.05295.653.7083.894=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------40-41150.0160.00.278100.01099.2300.06734710.041-42150.0160.00.27899.23098.4500.10934710.042-43150.0160.00.27898.45097.8580.14034710.043-44150.0160.00.27897.85897.3970.17532040.044-45150.0160.00.27897.39796.9380.20334710.045-46150.0160.00.27896.93896.6160.21628656.046-47150.0160.00.27896.61696.3030.23428656.047-48150.0160.00.27896.30395.9040.25237252.8=================================================================*****************************************************************造价=.80(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)---------------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======NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA\n-----------------------------------------------------------------120-1210.720104.16104.066102.811102.091.3471.975121-1220.690104.07103.953102.071101.381.9952.572122-1230.750103.95103.867101.365100.612.5883.252123-1240.690103.87103.646100.59299.903.2753.744124-1250.630103.65103.46199.88899.263.7584.203125-1260.810103.46103.16499.25598.454.2064.718126-1270.509103.16102.95898.44097.934.7245.027127-1280.085102.96102.92797.92897.845.0305.084=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------120-121140.0140.00.227102.846102.1260.03523772.0121-122140.0140.00.227102.126101.4360.05530705.0122-123140.0140.00.227101.436100.6860.07233375.0123-124140.0140.00.227100.68699.9960.09430705.0124-125140.0140.00.22799.99699.3660.10928035.0125-126140.0140.00.22799.36698.5570.11160958.8126-127140.0140.00.22798.55798.0480.11739187.8127-128140.0140.00.22798.04897.9630.1206531.3=================================================================*****************************************************************造价=.90(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------130-1312.800.640.000.642.301.460.000.00131-1323.600.820.001.452.303.340.000.00\n132-1337.401.680.003.132.307.200.000.00133-13418.814.270.007.402.1716.030.000.00134-13516.123.660.0011.052.0722.910.000.00=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------130-131230.01.463003.000.3100.1180.0000131-132230.03.343003.000.3970.1760.0000132-133390.07.203003.000.4970.2590.0000133-134330.016.033502.800.6000.3210.0000134-135450.022.913502.230.6100.4140.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------130-1310.690104.28104.096102.925102.241.3591.861131-1320.690104.10103.873102.218101.531.8782.345132-1331.170103.87103.478101.503100.332.3703.145133-1340.925103.48103.099100.29899.373.1803.725134-1351.004103.10102.69899.34198.343.7584.361=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------130-131140.0140.00.227102.960102.2700.03522781.5131-132140.0140.00.227102.270101.5800.05330705.0132-133140.0140.00.227101.580100.4100.07852065.0133-134140.0140.00.227100.41099.4860.11244055.0134-135140.0140.00.22799.48698.4820.14597969.5\n=================================================================*****************************************************************造价=.00(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------140-1410.850.190.000.192.300.440.000.00141-1425.941.350.001.542.303.540.000.00142-1436.751.530.003.072.307.060.000.00143-1440.000.000.003.072.307.060.000.00144-14512.212.770.005.842.2212.990.000.00=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------140-141360.00.443003.000.2170.0670.0000141-142350.03.543003.000.4040.1820.0000142-143230.07.063003.000.4940.2560.0000143-144440.07.063003.000.4940.2560.0000144-145230.012.993003.000.5870.3510.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------140-1411.080104.39103.929103.054101.971.3311.955141-1421.050103.93103.492101.940100.891.9892.602142-1430.690103.49103.456100.867100.182.6253.279143-1441.320103.46102.833100.17798.863.2793.976\n144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3795.24994.807.5407.93228-290.314102.74102.69894.80594.497.9328.20729-300.551102.70102.61594.44493.898.2548.722=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------20-21140.0140.00.22798.25797.8280.16247896.221-22140.0140.00.22797.82897.3540.16552250.422-23140.0140.00.22797.35496.8130.21380587.523-24140.0140.00.22796.81396.6230.29251686.424-25140.0140.00.22796.62396.3840.29261377.625-26140.0140.00.22796.38195.9490.290.226-27140.0140.00.22795.94995.5480.299.027-28140.0140.00.22795.54595.1010.296.228-29140.0140.00.22795.10194.7880.29677893.229-30140.0140.00.22794.78894.2370.343.6=================================================================*****************************************************************造价=.30(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------\n30-316.051.3756.0557.421.7399.3013.890.0031-320.000.000.0057.421.7399.300.0013.8932-335.101.160.0058.581.73101.080.0013.8933-342.200.500.0059.081.72101.840.0013.8934-358.371.905.0766.051.70112.470.0013.8935-365.581.270.0067.311.70114.390.0013.8936-377.751.760.0069.071.69117.040.0013.8937-380.000.000.0069.071.69117.040.0013.89=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------30-31220.0113.195001.530.7800.6920.000031-32320.0113.195001.580.7900.6850.000032-33320.0114.975001.610.8000.6870.000033-34370.0115.735001.660.8100.6830.000034-35300.0126.366001.560.8200.5360.000035-36230.0128.286001.600.8300.5370.000036-37310.0130.936001.630.8400.5400.000037-382670.0130.938000.700.6000.4000.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------30-310.336102.61102.54799.62899.292.9873.25531-320.504102.55102.48299.29298.793.2553.69532-330.517102.48102.37398.78798.273.6954.10333-340.614102.37102.22198.27097.664.1034.56534-350.469102.22102.09297.55697.094.6655.00535-360.367102.09101.93497.08696.725.0065.21536-370.505101.93101.70796.71796.215.2175.495\n37-381.869101.7199.20096.21293.065.4956.136=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------30-31140.0140.00.22799.97499.6380.34634755.631-32140.0140.00.22799.63499.1300.34350553.632-33140.0140.00.22799.13098.6130.34350553.633-34140.0140.00.22798.61197.9970.34192207.734-35140.0140.00.22797.87797.4080.32285143.035-36140.0140.00.22797.40897.0410.32265276.336-37140.0140.00.22797.04196.5360.32487981.137-38140.0140.00.22796.53393.5510.322.0=================================================================*****************************************************************造价=.90(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------1-27.352.0429.3631.401.8558.030.000.002-37.352.040.0033.441.8461.380.000.003-47.352.0429.7565.231.71111.240.000.004-50.000.000.0065.231.71111.2455.560.005-66.761.880.0067.111.70114.080.0055.566-79.992.780.0069.891.69118.270.0055.567-87.402.0629.23101.171.62164.390.0055.568-94.051.130.00102.301.62166.010.0055.56=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)\n-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------1-2410.058.034501.150.6000.5850.00002-3410.061.384501.160.6100.6050.00003-4430.0111.245001.450.7600.6980.00004-5410.0166.806001.260.8000.6910.00005-6310.0169.646001.290.8100.6940.00006-7420.0173.837001.260.8200.5400.00007-8410.0219.957001.140.8300.6500.00008-9340.0221.577001.170.8400.6480.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------1-20.47199.5599.64895.55295.083.9944.5672-30.47699.6599.69895.07294.604.5765.1023-40.62299.7099.70794.51993.905.1795.8104-50.51899.7199.60593.83193.315.8766.2925-60.40199.6199.53593.31292.916.2936.6246-70.53199.5399.53092.81192.286.7247.2497-80.46899.5399.51892.20491.747.3267.7828-90.39899.5299.48291.73691.347.7828.144=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------1-2150.0160.00.27895.81595.3440.26394402.52-3150.0160.00.27895.34494.8680.27294402.53-4150.0160.00.27894.86894.2460.349.34-5150.0160.00.27894.24693.7280.415.0\n5-6150.0160.00.27893.72893.3280.416.06-7150.0160.00.27893.19092.6590.378.87-8150.0160.00.27892.65992.1910.455.48-9150.0160.00.27892.19091.7920.454.6=================================================================*****************************************************************造价=.10(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------9-100.000.00142.03142.031.57222.3269.450.0010-1111.483.400.00145.431.56227.050.0069.4511-126.161.830.00147.261.56229.590.0069.4512-139.432.7947.63197.681.51298.380.0069.4513-145.061.500.00199.181.51300.390.0069.4514-155.171.5326.61227.321.49337.890.0069.4515-166.802.010.00229.341.48340.550.0069.4516-170.000.0070.96300.301.44432.9013.8969.45=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------9-10380.0291.778000.870.8000.6810.000010-11460.0296.508000.890.8100.6840.000011-12220.0299.048000.910.8200.6810.000012-13520.0367.839000.810.8300.6570.000013-14300.0369.849000.830.8400.6530.000014-15250.0407.3410000.790.8500.5870.000015-16750.0410.0010000.820.8600.5840.0000\n16-171000.0516.2410000.750.8700.7060.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------9-100.32999.4899.46295.75595.433.7274.03610-110.40899.4699.44395.42495.024.0384.42711-120.20099.4499.43795.01694.824.4274.62112-130.42299.4499.37794.76994.354.6685.03013-140.25099.3899.37394.34794.105.0305.27614-150.19899.3799.36193.99793.805.3765.56315-160.61299.3699.31293.79893.195.5636.12516-170.74999.3199.20093.06492.326.2486.884=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------9-10160.0160.00.29696.30095.9710.54585830.610-11160.0160.00.29695.97195.5630.547.811-12160.0160.00.29695.56195.3610.54573882.612-13160.0160.00.29695.36194.9390.591.013-14160.0160.00.29694.93594.6840.587.014-15160.0160.00.29694.58494.3850.587.015-16160.0160.00.29694.38293.7710.584.016-17160.0160.00.29693.77193.0220.706.0=================================================================*****************************************************************造价=.00(YUAN)总造价=.70(人民币)计算结果:2007-4-12,名称:\n*****************************************************************=================================================================总面积总管长总造价管网密度单位造价-----------------------------------------------------------------(HA)(米)(元)(米/HA)(元/米)-----------------------------------------------------------------1118.9537440.0.733.46234.12=================================================================总人口设计流量平均管径平均坡度-----------------------------------------------------------------(人)(升/秒)(米)(千分之)-----------------------------------------------------------------516.2100.499880.7081=================================================================*****************************************************************本方案分别在9点30点提升:9点提升流量为797.652m3/h,提升扬程为4.415m,选用200QW400-7-15型潜水排污泵,两台并联工作;30点提升流量为377.784m3/h,提升扬程5.738m,选用200QW400-7-15型潜水排污泵。\n附录2排水管网方案B计算表*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------50-518.402.330.002.332.305.370.000.0051-5215.404.280.006.612.1914.500.000.0052-5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95.846.5146.6388-90.700102.48101.89995.84495.146.6386.7559-100.354101.90101.60095.13694.786.7636.81910-110.356101.60101.27894.76894.416.8326.86611-120.358101.28101.00094.39694.046.8826.96112-130.366101.00100.61594.03793.676.9636.94413-140.394100.61100.21293.57193.187.0447.03514-150.302100.2199.93293.16692.867.0467.06815-160.30599.9399.76292.85792.557.0757.210\n16-170.40199.7699.54692.54792.157.2157.400=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------1-2140.0140.00.22799.68198.6910.05444055.02-3140.0140.00.22798.69198.1210.07541364.93-4140.0140.00.22798.12197.6410.07734833.64-5140.0140.00.22797.64197.1110.22576198.55-6140.0140.00.22797.05296.6980.21677529.66-7140.0140.00.22796.69896.4440.28971068.87-8140.0140.00.22796.44496.1580.31477893.28-9140.0140.00.22796.15495.4540.310.29-10150.0160.00.27895.45495.0990.31892055.610-11150.0160.00.27895.09994.7430.33192055.611-12150.0160.00.27894.74394.3860.34792055.612-13150.0160.00.27894.38694.0200.34984974.413-14150.0160.00.27893.88593.4920.314.014-15150.0160.00.27893.49293.1890.32580260.015-16150.0160.00.27893.18992.8850.33280260.016-17150.0160.00.27892.88592.4840.338.0=================================================================*****************************************************************造价=.00(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------17-187.352.0472.4574.491.68125.1813.890.0018-197.352.040.0076.531.68128.230.0013.89\n19-207.352.0429.75108.331.61174.690.0013.8920-210.000.000.00108.331.61174.6955.5613.8921-226.761.880.00110.201.61177.380.0069.4522-239.992.780.00112.981.61181.350.0069.4523-248.202.2829.23144.491.56225.740.0069.4524-254.051.130.00145.611.56227.300.0069.4525-260.000.0039.73185.341.52281.7513.8969.4526-2711.483.400.00188.741.52286.340.0083.3427-286.161.830.00190.571.52288.810.0083.3428-299.432.7947.63240.991.48355.910.0083.3429-305.061.500.00242.491.48357.880.0083.3430-315.171.5326.61270.631.46394.620.0083.3431-326.802.010.00272.651.46397.240.0083.3432-330.000.0027.78300.431.44433.060.0083.34=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------17-18410.0139.076001.380.8000.5910.000018-19410.0142.126001.410.8100.5960.000019-20430.0188.587001.200.8200.5760.000020-21410.0244.148001.040.8300.5670.000021-22310.0246.838001.070.8400.5660.000022-23420.0250.808001.090.8500.5690.000023-24410.0295.198001.030.8600.6450.000024-25340.0296.758001.060.8700.6430.000025-26380.0365.099000.940.8800.6210.000026-27460.0369.689000.960.8900.6210.000027-28220.0372.159000.990.9000.6190.000028-29520.0439.2510000.910.9100.5900.000029-30300.0441.2210000.930.9200.5870.000030-31250.0477.9610000.910.9300.6220.0000\n31-32750.0480.5810000.940.9400.6190.000032-331000.0516.4010000.930.9500.6530.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------17-180.56799.5599.64898.34697.781.2001.86918-190.57899.6599.69897.77797.201.8712.50019-200.51899.7099.70797.15296.632.5463.07220-210.42899.7199.60596.58496.163.1233.44921-220.33299.6199.53596.15695.823.4493.71122-230.45999.5399.53095.82295.363.7134.16823-240.42299.5399.51595.30194.884.2294.63624-250.35999.5299.48294.87994.524.6364.96225-260.35899.4899.46294.47594.125.0075.34526-270.44499.4699.44394.11793.675.3455.77027-280.21799.4499.43793.67393.465.7705.98228-290.47299.4499.37793.42392.956.0146.42629-300.27999.3899.37392.95192.676.4266.70130-310.22999.3799.36192.63792.416.7366.95331-320.70399.3699.31292.40891.716.9537.60632-330.92799.3199.20091.67390.757.6398.455=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------17-18150.0160.00.27898.70198.1340.35561942.818-19150.0160.00.27898.13497.5560.35774287.919-20150.0160.00.27897.55697.0380.40386490.220-21150.0160.00.27897.03896.6100.45492606.721-22150.0160.00.27896.60996.2770.45370019.7\n22-23150.0160.00.27896.27795.8180.45594865.423-24150.0160.00.27895.81895.3950.516.324-25150.0160.00.27895.39395.0340.514.225-26160.0160.00.29695.03494.6750.559.026-27160.0160.00.29694.67594.2310.559.027-28160.0160.00.29694.23094.0130.55780069.028-29160.0160.00.29694.01393.5410.590.629-30160.0160.00.29693.53893.2590.587.030-31160.0160.00.29693.25993.0310.622.531-32160.0160.00.29693.02892.3250.619.532-33160.0160.00.29692.32591.3980.653.0=================================================================*****************************************************************造价=.80(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------N(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------36-378.912.028.0310.052.0921.050.000.0037-383.080.700.0010.752.0822.350.000.0038-3910.852.460.0013.212.0326.850.000.0039-402.400.540.0013.762.0227.840.000.0040-410.000.004.3418.101.9635.530.000.0041-426.751.532.0221.651.9341.670.000.00=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------36-37320.021.053502.270.6000.3930.000037-38220.022.353502.280.6100.4050.0000\n38-39410.026.853502.090.6200.4600.000039-40220.027.843502.120.6300.4680.000040-41320.035.533501.890.6400.5600.000041-42320.041.673501.790.6500.6320.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------36-370.726102.74102.69898.38097.654.3575.04437-380.501102.70102.61597.65097.155.0485.46738-390.855102.61102.54797.12996.275.4866.27339-400.467102.55102.48296.27195.806.2766.67840-410.604102.48102.37395.77295.176.7107.20541-420.574102.37102.22195.14394.577.2307.652=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------36-37140.0140.00.22798.51897.7910.13869667.237-38140.0140.00.22797.79197.2900.14247896.238-39140.0140.00.22797.29096.4350.16189261.139-40140.0140.00.22796.43595.9680.16466468.640-41140.0140.00.22795.96895.3640.19696681.641-42140.0140.00.22795.36494.7900.22196681.6=================================================================*****************************************************************造价=.30(YUAN)*****************************************************************=================================================================NO.NF(N)QB(N)QW(N)Q(N)KZ(N)QK(N)QJB(N)QJ(N)-----------------------------------------------------------------\nN(HA)(L/S)(L/S)(L/S)(L/S)(L/S)(L/S)-----------------------------------------------------------------42-431.100.2521.6521.901.9242.110.000.0043-449.242.100.0024.001.9045.680.000.0044-457.261.650.0025.641.8948.460.000.0045-469.242.100.0027.741.8751.960.000.0046-470.000.000.0027.741.8751.960.000.00=================================================================NO.NL(N)QS(N)D(N)I(N)V(N)H/D(N)HDS(N)-----------------------------------------------------------------N(M)(L/S)(MM)(千分之)(M/S)(M/M)(M)-----------------------------------------------------------------42-43370.042.114001.410.6000.5460.000043-44300.045.684001.410.6100.5750.000044-45230.048.464001.420.6200.5960.000045-46310.051.964001.420.6300.6241.176646-472670.051.964001.480.6400.6160.0000=================================================================NO.NHIL(N)H(N)H(N+1)HG[N,2]HG(N+1,1)HMN2HMN11-----------------------------------------------------------------N(M)SHANGXIASHANGXIASHANGXIA-----------------------------------------------------------------42-430.523102.22102.092101.021100.501.2001.59443-440.422102.09101.934100.486100.061.6061.87044-450.326101.93101.707100.05699.731.8781.97845-460.441101.7199.31298.55398.113.1541.20046-473.94699.3199.31298.11294.171.2005.146=================================================================NO.NMM(N)WB(N)QO(N)HS(N,2)HS(N+1,1)HH(N)ZJ(N)-----------------------------------------------------------------N(M/HA)(L/MD)(L/SHA)SHANGXIA(M)(YUAN)-----------------------------------------------------------------42-43140.0140.00.227101.240100.7160.21939837.9\n43-44140.0140.00.227100.716100.2940.23032301.044-45140.0140.00.227100.29499.9680.23824764.145-46140.0140.00.22798.80298.3610.24944416.846-47140.0140.00.22798.35994.4130.247.6=================================================================*****************************************************************造价=.40(YUAN)总造价=.90(人民币)计算结果:2007-6-2,名称:*****************************************************************=================================================================总面积总管长总造价管网密度单位造价-----------------------------------------------------------------(HA)(米)(元)(米/HA)(元/米)-----------------------------------------------------------------1118.9536040.0.932.21226.94=================================================================总人口设计流量平均管径平均坡度-----------------------------------------------------------------(人)(升/秒)(米)(千分之)-----------------------------------------------------------------516.2100.515070.6286=================================================================*****************************************************************本方案分别在17点32点42点提升:17点提升流量为136.01L/s,提升扬程为6.196m,选用250QW600-7-22型潜水排污泵;32点提升流量为480.58L/s,提升扬程4.000m,选用300QW900-8-37型潜水排污泵两台并联工作;42点提升流量为41.67L/s,提升扬程6.451m,选用150QW140-9-5.5型潜水排污泵。\n\n附录3雨水干管计算表******************************************************************==================================================================NO.NL(N)D(N)F(N)V(N)I(N)Q0(N)QS(N)Q(N)------------------------------------------------------------------N(米)(毫米)(HA)(米/秒)(千分之)(L/SH)(升/秒)(升/秒)==================================================================1-2250.09005.580.8890.98101.33565.4565.42-3250.0110012.141.0000.9478.25950.0950.03-4250.0120018.701.0770.9865.151218.21218.24-5230.0120025.261.2661.3556.681431.81431.85-6250.0135030.761.1090.8851.591586.81586.86-7200.0135037.891.2311.0946.521762.71762.77-8200.0150042.901.1000.7643.511866.51943.98-9230.0150048.121.1060.7640.611954.31954.39-10280.0150054.711.1700.8637.792067.42067.410-11200.0150061.311.2150.9235.032147.92147.9====================================================================================================================================NO.NHIL(N)T2(N-1)HDS(N)L(N)/V(N)P(N)PSI(N)ZJ(N)------------------------------------------------------------------N(M)(MIN)(M)(MIN)(NIAN)(YUAN)==================================================================1-20.2440.000.6254.691.000.65571680.02-30.2364.690.2784.171.000.66592430.03-40.2448.860.1233.871.000.665.54-50.31012.720.0003.031.000.66598446.95-60.22115.750.0003.761.000.665.06-70.21819.510.1452.711.000.66590864.07-80.15122.220.3013.031.000.665.0\n8-90.17625.250.2503.471.000.665.79-100.23928.710.2393.991.000.665.210-110.18532.700.0362.741.000.665.0====================================================================================================================================NO.NH(N)H(N+1)HG(N,2)HG(N+1,1)HM(N,2)HM(N+1,1)N(M)(M)(M)(M)(M)(M)==================================================================1-2102.371102.102100.646100.4021.7251.7002-3102.102101.788100.12499.8881.9781.9003-4101.788101.52199.76599.5212.0232.0004-5101.521101.26399.52199.2112.0002.0525-6101.263101.00099.06198.8402.2022.1606-7101.000100.62798.69598.4772.3052.1507-8100.627100.32598.17698.0252.4512.3008-9100.32599.89997.77597.5992.5502.3009-1099.89999.42197.36097.1212.5392.30010-1199.42199.20097.08596.9002.3362.300==================================================================******************************************************************ZJN=.30(YUAN)ZLN=2340.00(M)NAME:2007-4-12******************************************************************==================================================================总投资=.30(YUAN)总管长=2340.00(M)单位造价=487.23(YUAN/M)==================================================================******************************************************************\n附录4空气管路计算表管段编号管段长度L空气流量空气流速v管径Dmm3/hm3/minm/smm1-20.700.6420.01071.008152-30.701.2840.02142.017153-40.701.9260.03213.025154-50.352.5680.04284.034155-60.705.1360.08564.538206-70.7010.2720.17123.545327-80.7015.4080.25685.318328-90.3520.5440.34244.538409-1010.8035.9520.59925.0835010-119.8071.9041.19845.1867011-129.80107.8561.79765.9568012-1313.70143.8082.39685.08310013-145.60287.6164.79366.50612514-155.60431.4247.19046.77715015-165.60575.2329.58725.08320016-175.60719.04011.98406.35320017-185.60862.84814.38084.87925018-195.601006.65616.77765.69325019-205.601150.46419.17444.51830020-215.601294.27221.57125.08330021-225.601438.08023.96805.64730022-233.901581.88826.36486.21230023-2439.603163.77652.72966.98940024-250.404745.66479.09446.70950025-2639.606327.552105.45926.21260026-270.407909.440131.82407.76560027-2828.009491.328158.18886.846700合计211.30\n续表管段编号管段当量长度L0管段计算长度L0+L压力损失h1+h2mm9.8Pa/m9.8Pa1-20.1800.880.490.432-30.1190.820.720.593-40.1190.821.431.174-50.1190.472.811.325-60.7511.453.765.466-70.5801.281.802.307-80.4461.154.405.048-90.7581.111.501.669-103.39914.201.3018.4610-111.09610.902.8030.5111-121.28611.093.0033.2612-137.80921.511.4030.1113-142.1977.802.0015.5914-152.7348.331.4011.6715-163.8629.460.605.6816-172.6558.250.806.6017-185.04710.650.384.0518-193.4709.070.423.8119-206.28211.880.354.1620-214.3199.920.393.8721-224.3199.920.403.9722-2314.13418.030.509.0223-248.87248.470.4521.8124-2511.59612.000.404.8025-2614.43254.030.2614.0526-279.92210.320.808.2627-2844.49572.500.2215.95合计   263.59\n附录5空气管路计算用图\n附录6污水高程计算表管段管路系统构筑物水头损失本段水头损失下游水面标高构筑物水面标高DNvL1000i沿程水头损失局部水头损失mmm/sm mmmmmm出水井    0.000.000.000.00103.00103.00出水井-格栅矩形渠道0.010.00 0.01102.99 格栅    0.000.000.120.12102.87 格栅-沉砂池矩形渠道0.020.150.17102.70 沉砂池    0.000.000.150.15102.55102.70沉砂池-配水井8001.0112.51.510.020.010.000.02102.53 配水井    0.000.000.100.10102.43102.53配水井-初沉池5001.2814.54.210.060.02 0.08102.35 初沉池    0.000.000.500.50101.85102.35初沉池-集水井5001.2824.210.010.00 0.01101.84 集水井    0.000.000.100.10101.74101.84集水井-SBR8001.01831.510.130.04 0.16101.57 SBR    0.000.000.400.40101.17101.57SBR-消毒池8001.01751.510.110.03 0.15101.03 消毒池    0.000.000.280.28100.75101.03消毒池-集水井8001.0151.510.010.00 0.01100.74 集水井    0.000.000.100.10100.64100.74集水井-巴氏堰8001.01101.510.020.00 0.02100.62 巴氏堰    0.000.000.260.26100.36100.62巴氏堰-出水口8001.01351.510.050.02 0.07100.29 \n附录7污泥高程计算表连接管道水头损失计算表管渠及构筑物名称流量管渠设计参数水头损失(m)(L/s)LDvhfξhdh初沉池至贮泥池16.6748.501500.9430.3752.0200.0920.46733.3344.502001.0610.3060.0400.0020.308曝气池至浓缩池32.41165.502001.0321.0791.7800.0971.175浓缩池至贮泥池10.804.001001.3750.1002.3100.2230.323贮泥池至一级消化池44.1440.002001.4050.4621.9700.1980.660一级消化池至二级消化池15.5018.001500.8770.1222.9700.1170.238二级消化池至脱水机房12.605.001001.6040.1663.9700.5210.687污泥处理构筑物及管渠水面标高计算序号管渠及构筑物名称实际泥面标高需要泥面标高地面标高1初沉池 102.35099.2003贮泥池 100.07599.2005浓缩池 102.75199.2004曝气池101.570105.12699.2006一级消化池97.915105.20099.2008二级消化池 103.46299.20010脱水机房 101.27499.200由计算结果可知:1.曝气池至浓缩池需要提升3.556m,提升流量166.676m3/h,选用SV064B芬兰沙林S型潜水泵,功率5.5kW,转速1449r/min;2.由贮泥池至一级消化池需要提升7.285,提升流量158.904m3/h,选用S1074AH芬兰沙林S型潜水泵,功率7.0kW,转速1423r/min。\n附录8污水厂投资估算表序号工程或费用名称估算价值(万元)建筑工程费安装工程费设备购置费合计1格栅间及提升泵房85.6633.75161.53280.942沉砂池72.1328.72129.69230.543初沉池配水井7.810.83 8.644初沉池540.4530.24174.66745.355生物处理池1280.46786.3100.192166.956污泥提升泵房36.0516.9248.84101.817消毒间38.3131.22132.6202.138接触池121.1316.9111.4249.439鼓风机房83.8147.59164.96296.3610污泥浓缩池37.1414.7457.42109.311贮泥池15.111.254.821.1612污泥消化池553.9823.3189.65666.9413脱水机房52.1335.8624.08112.0714处理厂电气 45.03241.69286.7215处理厂仪器及自控 67.22517.06584.2816综合楼115.2  115.217检测中心73.71  73.7118变电所13.2  13.219职工宿舍53.55  53.5520活动中心51.3  51.321食堂23.75  23.7522机修间21.25  21.2523仓库50.4  50.424车库59.85  59.8525锅炉房28.57.8459.3895.7226门卫3.6  3.627化验设备  160160\n28机修设备  858529汽车  737330电力外线 166.45 166.4531通讯工程 9.126.2215.3432厂区平面632.94883.19 1516.1333第一部分费用小计   8640.07      1建设单位管理费   107.542职工培训费   12.243办公及家具购置费   6.84征地费   476.955联合试专用   22.836施工简监理费   117.327招标工作费用   48.888工程保险费   43.999勘测费   48.58810设计费   543.3911预算费   54.3412前期工程费用   41.6313第二部分费用小计   1524.498      1预备费   1130.112建设期贷款利息   388.753铺底流动资金   59.154总计   11742.578