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毕业设计题目：20000m3/h煤气化煤气湿法脱硫工艺设计系别：化学与化学工程系专业：化学工程与工艺姓名：学号：指导教师：河南城建学院本科毕业设计任务书河南城建学院本科毕业设计成绩评定说明河南城建学院本科毕业设计设计说明I设计说明湿法脱硫可以处理含硫量高的煤气，脱硫剂是便于输送的液体物料，可以再生，且可以回收有价值的元素硫，从而构成一个连续脱硫循环系统。栲胶法是湿法脱硫中一种较为成熟的方法，具有脱硫效率高、对硫化氢含量不同的煤气适应性大、脱硫溶液无毒性、对操作温度和压力的适应范围广、对设备腐蚀性小，所得副产品硫磺的质量好的优点。本设计对煤气化煤气净化脱硫工艺进行了设计计算，着重设计计算了脱硫过程的关键设备，包括物料衡算，热量衡算，填料塔反应器尺寸的计算及辅助设备的查取，并对主要设备进行了机械强度校核。(1)物料衡算设计中脱硫塔气体中的H2S含量为10.0g/m3，净化后H2S含量为0.3g/m3。在进行物料衡算时，由20000m3/h的原料气进入脱硫塔，计算得脱硫量为194.00kg/h，溶液循环量为1940m3/h。(2)热量衡算分别对冷却塔，硫泡沫槽，熔硫釜进行了热量衡算，算得冷却塔的热负荷为70919.56KJ/tNH3，冷却水消耗量为14.1833/mtNH；硫泡沫槽的热负荷为205147.51KJ/tNH3，蒸汽消耗量为93.14KJ/tNH3；熔硫釜的热负荷为479085.96KJ/釜，蒸汽消耗量为224.4Kg/釜。(3)填料塔的计算计算得塔径为4.0m，塔高26.1m，填料层高度15.6m，压降为102Pa。(4)本设计包含三个图：湿法脱硫主设备图，流程图和物料流程图。关键词：煤气,栲胶法,湿法脱硫河南城建学院本科毕业设计设计说明IIDesignNotesThemethodtakesoffsulphurtohandlecoalgaswithamountofsulphurGaoandtakesoffthesulphurliquidmaterialthatiseasytotransport,canbereborn,andcanrecallworthychemicalelementsulphurandconstitutesacirculatorysystemthattakeoffsulphurinarowthus.ThisdesignfocusedaheatofcoalgasdecontaminationtotakeoffasulphurcrafttocarryonadesigncalculationandemphasizedadesigntocomputethekeyequipmentsoftakingoffthesulphurprocessandincludedmaterialHengcalculate,caloriesHengcalculate,thecheckingofcalculationandassistanceequipmentsofthefillertowerreactorsizetakes,andcarriedonmachinestrengthpitintheschooltothemainequipments.(1)Materialcalculationindesignofdesulphurizationtowergascontentof10.0g/H2S,afterpurificationH2Scontentofm3for0.3g/m3.Whenthematerialbalanceby20000m3/histhefeedgasintohdesulphurizationtower,calculated194.00kg/fordesulphurizationquantityh,solutionforcirculation1940m3/h.(2)Heatcalculationofcoolingtower,thesulfurfoamrespectivelythesulfurmeltingkettletrough,theheatcalculation,calculatethecoolingtowerheatloadfor70919.56KJ/tNH3,coolingwaterconsumptionis14.18;Theheatloadofsulfurfoamslotfor205147.51KJ/tNH3,steamconsumptionis93.14KJ/tNH3;Theheatloadofthesulfurmeltingkettlefor479085.96KJ/kettle,224.4Kg/steamconsumptionforkettle.(3)Packedtowercalculatedtotowerdriveforhightower4.0m,26.1m,7%theheightfor102Pa15.6m,pressuredrop.(4)Thisdesigncontainsthreegraph:wetdesulphurizationmainequipmentschematicsandflowchartandmaterialflowchart.Keyword:coalgas,thewetmethodtakesoffsulphur，tanninextracttotakeoffasulphurmethod河南城建学院本科毕业设计目录i目录1引言............................................................................................................................11.1概述.........................................................................................................................11.2文献综述.................................................................................................................11.2.1煤气净化的现状..............................................................................................11.2.2栲胶的认识......................................................................................................21.2.3栲胶法脱硫的优缺点.....................................................................................31.3设计任务的依据....................................................................................................32生产流程的确定..........................................................................................................72.1各脱硫方法对比.....................................................................................................73生产流程说明..............................................................................................................93.1反应机理.................................................................................................................93.1.1碱性水溶液吸收H2S.......................................................................................93.1.2NaHS与偏钒酸钠反应生成焦钒酸钠，析出单质硫...................................93.1.3将Na2V4O9氧化成偏钒酸钠........................................................................93.1.4还原态栲胶的氧化：酚态栲胶被氧化获得再生，同时生成H2O2.............93.1.5在生产中还有生成硫代硫酸钠的副反应.....................................................93.2主要操作条件.......................................................................................................103.2.1溶液组分........................................................................................................103.2.2温度................................................................................................................103.2.3CO2的影响......................................................................................................113.3工艺流程...............................................................................................................113.4主要设备介绍.......................................................................................................123.4.1填料塔............................................................................................................123.4.2氧化槽............................................................................................................133.4.3反应槽............................................................................................................133.4.4贫液泵.............