火电厂2×600MW机组烟气脱硫工程设计

火电厂2×600MW机组烟气脱硫工程设计火电厂2×600MW机组烟气脱硫工程设计摘要本设计针对火电厂2×600MW机组烟气脱硫系统进行初步设计，根据该电厂所给出的煤质和燃煤量、石灰石成分和脱硫要求等原始资料，并结合我国烟气脱硫的技术现状而设计出的一套烟气脱硫系统。本设计的主要内容是对目前几种主要的烟气脱硫工艺做综述性介绍，然后通过比较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脱硫工艺。本设计选择石灰石—石膏湿法脱硫工艺。本设计主要是介绍该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。最后对所设计脱硫系统做出总结性分析，并作简单的工程概算和技术经济分析。关键词：烟气脱硫；石灰石—石膏湿法；吸收系统；主体设备计算火电厂2×600MW机组烟气脱硫工程设计Fluegasdesulfurizationprojectofthermalpowerplant2x600MWdesignABSTRACTThisdesignforfluegasdesulfurizationsystemsofpowerplant2x600MWforpreliminarydesign,accordingtothepowerplantisgivenbythecoalqualityandcoal,limestonecompositionanddesulfurizationrequirements,suchasrawmaterial,andthecurrentsituationoffluegasdesulfurizationtechnologyinChinaanddesignsasetoffluegasdesulfurizationsystem.Themajorworkforthisdesignis：Introducesthemajorseveralfluegasdesulfurizationtechnologies,choosesproperFGDprocessforthisprojectaftercomparetheadvantagesanddisadvantagesandtheusingsitua-tionofthedesulfurizationprocess.Finally,wechoicelimestone-gypsumwetfluegasde-sulfurizationforthisdesign.Thisdesignistointroducethesystemofdesulfurizationprocessofeachsubsystemandequipmentlayout.AsfortheFGDsystem,mainlyintroducesthefacilityarrangementofsubsystemsinFGDsystem,andthesystemoflimestoneslurrypreparation,gypsumtreatmentsystem,adsorptionsystem,systemoffluegasandwastewatertreatmentsystem.Attheendofthisdesign,itmakessomecomprehensiveanalysisofthewholesystemdesigned,andmakessomeengineeringbudgetaryaswellassomesimpleeconomicandtechnicalanalysis.Keywords:Fluegasdesulfurization;wetlimestone-gypsum;absorptionsystem;calcul-ationofthemainequipment火电厂2×600MW机组烟气脱硫工程设计目录第一章绪论....................................................11.1烟气脱硫背景.........................................................................................11.2烟气脱硫的目的及意义.........................................................................21.3课题的主要内容.....................................................................................2第二章工程概况.................................................32.1电厂概况.................................................................................................32.2工程工艺主体设备简介.........................................................................32.3工程设计原始数据.................................................................................42.3.1煤质和燃煤量..............................................................................42.3.2石灰石分析及粒径资料..............................................................42.3.3水质..............................................................................................52.4设计依据.................................................................................................6第三章烟气脱硫工艺的选择.......................................73.1脱硫工艺概况.........................................................................................73.1.1燃烧前脱硫..................................................................................83.1.2燃烧中脱硫..................................................................................83.1.3燃烧后脱硫..................................................................................83.2几种常见的脱硫工艺...........................................................................103.2.1石灰石-石膏湿法脱硫工艺......................................................103.2.2旋转喷雾半干法烟气脱硫工艺（LSD法）...........................113.2.3炉内喷钙加尾部增湿活化工艺（LIFAC法）.......................123.2.4双碱法烟气脱硫工艺................................................................123.3脱硫工艺的确定...................................................................................133.4石灰石/石膏法FGD工艺.................................................................143.4.1烟气系统....................................................................................14火电厂2×600MW机组烟气脱硫工程设计3.4.2吸收和氧化系统........................................................................153.4.3石灰石制备系统......................................................................163.4.4烟气再热系统..........................................................................163.4.5石膏脱水系统............................................................................163.4.6脱硫风机..................................................................................173.4.7废水处理系统..........................................................................17第四章物料平衡计算...........................................184.1烟气参数计算.....................................................................................184.1.1烟气量的计算..........................................................................184.1.2SO2排放计算..........................................................................214.1.3FGD入口污染物成分(设计煤质，6%O2，标态，干基)....214.1.4烟气组分(引风机出口/标态)..................................................224.2吸收剂消耗量的计算.........................................................................244.2.1净烟气中SO2浓度...................................................................244.2.2石灰石消耗量..........................................................................244.2