煤气吹脱解析法处理一百万吨焦化厂剩余氨水工艺设计

武汉科技大学本科毕业设计I摘要焦化厂剩余氨水是冶金钢铁行业含氨氮较高的污染源。国内焦化厂为脱除剩余氨水中的氨氮，一般均采用传统的直接蒸汽汽提蒸氨法，蒸氨废水经生化处理后循环使用或外排。但此方法存在成本高，能耗大，脱除率较低，生化处理负荷大等问题，而且长期以来国内氨氮一直未达到国家废水处理的排放标准。因此，迫切需要对焦化厂除氨氮的方法进行改进，使之更符合节能、环保技术经济的要求。本文利用“煤气吹脱解吸法”中试所得到的最佳数据设计了一条煤气吹脱解析法处理100万吨焦化厂剩余氨水的工艺，利用硫氨工段后的贫氨煤气对剩余氨水进行吹脱，吹脱后的富氨煤气再送到硫氨工段脱氨，从而达到对剩余氨水的处理效果。采用的都是一些较新型的设备，如陶瓷膜过滤器，漩流式反应器，吹脱塔等。而且与传统直接蒸汽蒸氨法相比．具有运行成本低、工艺简单、便于操作等优点。以及与A2/O生化处理工艺的适应性，取得了较好的效果，经处理后的废水中氨氮的脱除率达到95%以上，大大减轻了A2/O法的负荷，为焦化剩余氨水的综合处理指出了一条新路线。关键词：剩余氨水；煤气吹脱解吸法；氨氮的去除武汉科技大学本科毕业设计IIAbstractSurplusammoniawaterofCokingandChemistryPlantisthemetallurgicalsteeltradepollutionsourceshigherinammonianitrogencontent.DomesticCokingandChemistryPlantinordertoremoveammonianitrogenfromsurplusammoniawater,adopttraditionaldirectsteamstripping,steamammonialawgenerally,steamtheammoniawastewaterisrecycledafterbiochemistrydealwithordischarged.Butthismethodexistshighcosts,energyconsumptionheavy,lowremovalrate,biochemistryhandleloadproblemsuchasbeingheavy,anddomesticammonianitrogendidnotreachnationaldischargestandardofwastewatertreatmentforalongtime.So,themethodofammonianitrogenremovalneedstoimproveinCokingandChemistryPlanturgentlyandmakeitaccordwiththedemandsforenergy-conservation,technologicaleconomyofenvironmentalprotectionevenmore.Thistextusethethebestdatagainfromthecoalgasblow-denitrogenationandadsorptionstrippinghavingdesignedahandicraftofusethecoalgasblow-denitrogenationandadsorptionstrippinghandlethesurplusammoniawaterofonemilliontonsofcokingfactory.Makeuseofthecoalgasfromsulfurammoniaprojectblow-denitrogenationthesurplusammoniawater,thentherichammoniacoalgasboastingdeliverstosulfurammoniaprojectagaintotakeoffammonia,Toreachthetreatmenteffecttosurplusammoniawaterthereby.Adoptedsomelate-modelequipment,eg:Ceramicfilter,Eddystreamstylereactor,Boasttower,andsoon.Havethemeritoflowworkingcost,simplehandicraftandeasytohandle.AndhandletheadaptabilityofthecraftwithA2/Obiochemistry,makebetterresult.Theremovalrateoftheammonianitrogenismorethan95percentinthewastewaterafteritisdealtwiththatthecoalgaslow-denitrogenationandadsorptionstripping,greatloadoflighteningA2/Olaw,tofoundanewrouteforthecomprehensivetreatmentofsurplusammoniawaterofcoking.Keyword：surplusammoniawater;coalgasblow-denitrogenationandadsorptionstripping;ammonianitrogenremoval武汉科技大学本科毕业设计III目录1总论......................................................................................................................................21.1概述.............................................................................................................................21.2剩余氨水的来源，特点及质量组成.........................................................................21.3车间规模组成及主要装备水平.................................................................................31.4节能技术与环保.........................................................................................................31.5主要技术方案综述.....................................................................................................31.5.1主要技术的叙述................................................................................................31.5.2吹脱工艺流程，设备及其特点........................................................................41.6设计的依据.................................................................................................................51.6.1数据依据............................................................................................................51.6.2试验依据............................................................................................................51.7设计存在的主要问题及处理.....................................................................................52吹脱法处理剩余氨水工艺论述..........................................................................................72.1目前国内外吹脱法的现状.........................................................................................72.1.1吹脱技术净化石油污染地下水........................................................................72.1.2吹脱法处理中低浓度氨氮废水........................................................................72.1.3氧化吹脱－离子交换处理2－萘酚生产废水.................................................72.1.4超声波吹脱技术处理高浓度氨氮废水............................................................82.1.5超重力法吹脱氨氮废水技术............................................................................82.1.6吹脱法脱除炼油厂含硫化氢废水....................................................................92.2目前国内外剩余氨水的生化处理方法...................................................................102.2.1传统工艺脱氮法..............................................................................................102.2.2A/O(缺氧/好氧)脱氮工艺...............................................................................112.2.3A2/O法.............................................................................................................122.2.4氧化沟硝化脱氮法..........................................................................................132.2.5SBR法（间歇曝气活性污泥法）..................................................................142.2.6短程（或简洁）硝化反硝化法..........................