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成都理工大学工程技术学院毕业论文某焦化废水治理工艺设计作者姓名：XXX专业名称：环境工程指导教师：XXX讲师某焦化废水治理工艺设计I摘要焦化废水中含有大量的氨氮以及多种有毒的有机化合物，如多环芳烃等成分复杂的化合物。从组成成分上讲，焦化废水必然会造成环境废染、影响人体健康。处理焦化废水的方法有许多，生物法以其在经济上可行性较好的特点而得到广泛应用。本文为某焦化废水处理工艺设计，规模为300立方米/日。废水处理流程为：进厂废水从泵房到隔油池，然后流入气浮池，气浮池出水进入调节池，调节池出水进入A/O反应池，再进入二次沉淀池，二次沉淀池出水进入混凝沉淀池，最后出水。污泥处理的流程为：从二沉池以及混凝沉淀池排出的剩余污泥进入污泥浓缩池，再进入污泥脱水间，最后外运处置。废水处理后的出水优于国家《综合废水排放标准》(GB8978-1996)一级标准。选择A/O工艺处理焦化废水，在脱氮方面的效率要明显高于SBR法以及CASS氧化沟等方法。关键词：A/O工艺；焦化废水；脱氮某焦化废水治理工艺设计IAbstractCoke-plantwastewatergeneratedfromcoal-cookingprocessescontainshighlevelsofNH3-N.ApartfromNH3-Ncoke-plsntwastewatercontainsvariousgroupsoftoxicorganiccompoundssuchaspolynucleararomatichydrocarbons(PAHs)andheterocycliccompounds.Fromacompositionalpointofview,colk-plantwastewaterthereforepresentsadverseenvironmentalandheltheffects.Severalmethods(physic-chemicalandbiologicalmethods)havebeenemployedintheremovalofNH3-NandCODfromcoke-plantwastewater.Thebiologicalmethodsaremostoftenemployedbecauseoftheireconomicaadvantagesoverphysical-chemicalmethods.Thisarticleisadesignofoneprojectforthetreatmentofcoke-plantwastewater.Theconstructionofthisprojectis300m3perday.Theprocessisthat:thewastwaterrunsfrompumphousetogreasetrap,enterstheflotationtank,entersregulationpool,thenentersA/Oreactortank,entersthesecondarysedimentationtank,thenentersthecoagulationandsedimentationtank,atlastletsout.Theprocessofthesludgeisthat:thesurplussludgefromthesedimentationtankenterssludgethickener,thenentersdehydrationhouse,thenitisdehydrated,atlastitiscarriedoutoftheplant.TheoutletwateroftheplantmeetstheleveloneoftheNationalDischargeStandardofSteelindustrystandardsforwaterpollutants(GB8978-1996).SelectingtheAnoxic-Oxicsystemforthetreatmentofcoke-plantwastewaterismoreefficientthanthecraftofSBRandthecraftofCASSetc.Itcantakelargequantityofthenitrogenfromcoke-plantwastewater.Keywords：TheAnoxic-Oxic;Cokeplantwastewater;Takingoffthenitrogen某焦化废水治理工艺设计II目录摘要.................................................IABSTRACT..............................................I目录.................................................II前言..................................................11焦化废水概述........................................21.1焦化废水概况...................................21.1.1焦化废水来源与组成.........................21.1.2焦化废水的特点及危害.......................41.2国内外焦化废水处理技术.........................51.2.1物理化学法.................................61.2.2生化处理法.................................61.2.3化学处理法.................................72水质分析和处理工艺选择..............................92.1建厂当地自然条件................................92.1.1来源组成.....................................92.1.2水质特征....................................102.1.3排放量.....................................102.2排放标准.......................................112.3.1焦化废水水质.................................112.4处理工艺的选择................................112.4.1处理工艺流程选择应考虑的因素..............112.4.2工艺对比..................................122.4.3工艺选择..................................152.4.4A/O工艺原理...............................152.5各段工艺去除率................................163主体构筑物设计....................................183.1格栅...........................................183.2集水池.........................................203.3隔油池........................................213.4调节池........................................223.5事故池........................................23某焦化废水治理工艺设计III3.6缺氧池........................................233.8二沉池.........................................26混合反应池.........................................283.10混凝沉淀池....................................293.11污泥浓缩池...................................303.12回流水井.....................................314设备选型...........................................324.1格栅设计选型..................................324.2风机选型......................................324.4废水污泥泵选型................................324.5加药装置选型...................................334.5.1加药装置选型..............................334.6污泥脱水机选型................................344.7搅拌机选型....................................344.8刮泥机及撇油机选型............................345废水处理厂总体布置.................................345.1废水处理厂平面布置............................345.1.1废水处理厂平面布置原则....................345.1.2废水处理厂平面布置........................375.2废水处理厂高程布置............................375.2.1废水处理厂高程布置方法....................375.2.2本废水处理厂高程计算......................396劳动定员及附属构筑物...............................406.1劳动定员......................................406.2附属构筑物....................................406.3附属化验设备..................................417投资及运营费用分析................................427.1土建投资估算..................................427.2设备投资估算..................................437.3运行费用估算..................................45结论...............................................47致谢.................................................48参考文献..............................................49某焦化废水治理工艺设计1前言水是地球的重要组成部分，也是生物机体不可缺少的组分，人类的生存和发展离不开水资源。地球上约有97.3%的水是海水，它覆盖了地球表面的70%以上，但由于海水是含有大量矿物盐类的“咸水”，不宜被人类直接使用。这样，人类生命和生产活动能直接利用且易于取得的淡水资源就十分有限，不足总水量的3%，且其中约3/4以冰川、冰帽等固态的形式