环境工程设计-烟气脱硫

河南城建学院本科毕业设计毕业设计题目：2×300MW新建热电厂脱硫系统设计学院：市政与环境工程学院专业：环境工程姓名：学号：指导老师：完成时间：河南城建学院本科毕业设计摘要本设计针对某新建热电厂所给出的烟气中硫的含量、石灰石成分和除尘脱硫要求，结合我国烟气除尘脱硫的技术现状而设计出的一套烟气除尘脱硫系统。本设计的主要内容为，对目前几种主要的除尘和烟气脱硫工艺做详细介绍，然后通过比较各除尘方式以及各脱硫工艺的优缺点和使用情况，选择适合本设计工程概况的除尘方式和脱硫工艺。本设计选择电除尘和石灰石—石膏湿法脱硫工艺。本设计主要是介绍该除尘脱硫系统中的各个子系统的工艺过程和设备布置，它们分别是除尘系统、烟气系统、吸收系统、吸收剂浆液制备系统、石膏脱水系统以及废水处理系统，并重点对电除尘器、吸收系统、吸收剂浆液制备系统和石膏脱水系统中的主要设备进行计算设计选型。最后对所设计除尘脱硫系统做出总结性分析。关键词：湿法石灰石－石膏法,电除尘器,烟气脱硫河南城建学院本科毕业设计AbstractAbstractThedesignpresentedinanewlybuiltthermalpowerplant,limestonecompositionanddustremovaldesulfurizationoffluegascontentrequirements,combinedwiththefluegasdesulfurizationanddustremovaltechnologysituationofasetoffluegasdesulfurizationdenitrationsystem.Themajorworkforthisdesign：Introducesseveralfluegasdesulfurizationtechnologies,choosesproperFGDprocessforthisprojectaftercomparingmeritsanddrawbacksofseveralmajordustremovalandfluegasdesulfurizationtechnologies.Finally,weappliedthewetlimestone-gypsumfluegasdesulfurizationprocess.Thisdesignistointroducethesystemofdustremovalanddesulfurizationprocessofeachsubsystemandequipmentlayout.AsfortheFGDsystem,mainlyintroducestheprocessandfacilityarrangementofsubsystemsinFGDsystem,andtheyarerespectivelythesystemoflimestoneslurrypreparation,gypsumtreatmentsystem,adsorptionsystem,systemoffluegasandwastewatertreatmentsystem.Attheendofthisdesign,itmakessomecomprehensiveanalysisofthewholesystemdesigned,andmakessomeengineeringbudgetaryaswellassomesimpleeconomicandtechnicalanalysis.Keywords:wetlimestone-gypsumandscr.somemethod,fluegasdesulfurizationanddenitrationmainequipment河南城建学院本科毕业设计目录目录1绪论......................................................................11.1烟气除尘脱硫的背景.....................................................11.2我国烟气脱硫技术应用现状...............................................11.3烟气脱硫的目的及意义...................................................22工程概况....................................................................32.1单位生产情况...........................................................32.2烟气参数..............................................................32.3主要内容和具体要求.....................................................53物料平衡计算..............................................................63.1烟气量、烟尘和二氧化硫浓度的计算.......................................63.2除尘、脱硫效率的计算...................................................73.3石灰石消耗量...........................................................74烟气脱硫工艺的选择.........................................................94.1几种常见的脱硫工艺.....................................................94.1.1石灰石-石膏湿法脱硫工艺..........................................94.1.2旋转喷雾半干法烟气脱硫工艺（LSD法）.............................94.1.3炉内喷钙加尾部增湿活化工艺（LIFAC法）..........................104.1.4烟气循环流化床脱硫（CFB）工艺...................................114.2脱硫工艺的比较.........................................................94.3脱硫工艺的选择........................................................124.4石灰石-石膏湿法烟气脱硫工艺系统.......................................134.4.1烟气系统........................................................134.4.2so2吸收系统....................................................134.4.3石灰石浆液制备系统..............................................144.4.4石膏脱水系统....................................................144.4.5供水和排放系统..................................................145主要设备尺寸、规格的计算..................................................165.1除尘器...............................................................165.1.1除尘器类型的确定................................................165.1.2电除尘器的设计计算..............................................185.1.3电除尘器总体尺寸的确定..........................................225.1.4电除尘器零部件的设计和计算......................................245.2烟气系统.............................................................255.2.1旁路烟道........................................................255.2.2FGD入口烟道....................................................255.2.3FGD出口烟道....................................................255.2.4烟气挡板门......................................................265.2.5烟气换热器......................................................265.32SO吸收系统.........................................................26河南城建学院本科毕业设计目录5.3.1吸收塔的选择....................................................275.3.2吸收塔尺寸设计计算..............................................285.3.3吸收塔附属设备的选型............................................295.3.4吸收塔高度的计算................................................315.4浆液制备系统的设计计算................................................315.4.1浆液制备系统的选择..............................................315.4.2主要设备的计算..................................................315.5其他系统设备设计选择..................................................335.5.1增压风机........................................................335.5.2搅拌器..........................................................345.5.3石膏处置系统....................................................345.5.4废水排放系统和处理系统..........................................355.5.5浆液排放与回收系统..............................................355.5.6工艺水耗量的计算.........................