摘要筛板塔是化工生产中主要的气液传质设备。为完成苯-甲苯二元物系的精馏进行了相关塔设备的设计，本次设计的任务为分离进料量50000吨/年，质量分数为40%的苯-甲苯溶液，使塔顶产品苯的质量分数达到96%，塔底釜液质量分数为2%。我们对此塔进行了工艺设计，按照梯级图解法算求得理论板数为15，实际板数为27，,加料位置在第13块板。进行了塔板结构的设计，塔径1.2m，精馏段板间距0.35m，提馏段板间距为0.4m,对塔板进行了校核，均在安全操作范围内，确定了操作点，精馏段弹性操作为5.04，提馏段弹性操作为5.30，符合操作要求。最后进行辅助设备及塔高计算。本次设计包括设备分析、选取、计算、核算、绘图等，是较完整的精馏设计过程，其设计结果满足设计任务要求，结构合理，是一次较理想的设计。关键词：筛板塔；苯-甲苯；精馏；负荷性能图；塔设备；结构AbstractSieveplatetoweristhemaingasliquidmasstransferinchemicalproductionequipment.Tocompletethebinarysystembenzene-toluenedistillationtowerequipment,theuseofdesign,thedesigntasksfortheseparationoffeedrateof50000tons/year,themassfractionof40%ofbenzene-toluenesolution,makethetopproductsofbenzenemassfractionof96%,thebottomkettleliquidmassfractionof2%.Weforthetechnologicaldesignofthistower,accordingtothetheoreticalplatenumberobtainedbycascadegraphicalmethodcalculationfor15,realplatenumberis27,andfeedinglocationin13boards.Forthedesignoftheplatestructure,thetowerdiameter1.2m,platespacingof0.4montheplate,arewithinthescopeofthesafetyoperation,determinetheoperatingpoint,rectifyingsectionelasticoperationis5.04,strippingsectionoftheelasticoperatingat5.30,conformtotherequirementsoftheoperation.Finallyauxiliaryequipmentandheightcalculation.Thisdesignincludingequipmentanalysis,selection,calculation,accounting,drawing,etc.,isacompletedistillationprocessdesign,thedesignresultsatisfiestherequirementofdesigntask,reasonablestructure,isanidealdesign.Keywords:HYPERLINK"javascript:void(0);"Sieve-plateHYPERLINK"javascript:void(0);"tower；Benzene-Toluene；Rectification；Loadperformancediagram；Distillationequipment；structure目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc392066728"第一章概述PAGEREF_Toc392066728\h3HYPERLINK\l"_Toc392066729"1.1苯的性质PAGEREF_Toc392066729\h3HYPERLINK\l"_Toc392066730"1.1.1物理性质PAGEREF_Toc392066730\h3HYPERLINK\l"_Toc392066731"1.1.2化学性质PAGEREF_Toc392066731\h4HYPERLINK\l"_Toc392066732"1.13基本用途PAGEREF_Toc392066732\h4HYPERLINK\l"_Toc392066733"1.2甲苯PAGEREF_Toc