化工原理及化工机械基础课程设计分离苯-甲苯混合液的浮阀板式精馏塔工艺设计中文摘要：目前用于气液分离的传质设备主要采用板式塔，对于二元混合物的分离，应采用连续精馏过程。浮阀塔在操作弹性、塔板效率、压降、生产能力以及设备造价等方面都比较优越。其主要特点是在塔板的开孔上装有可浮动的浮阀，气流从浮阀周边以稳定的速度水平进入塔板上液层进行两相接触，浮阀可根据气体流量的大小上下浮动，自行调节。其中精馏塔的工艺设计计算包括塔高、塔径、塔板各部分尺寸的设计计算，塔板的布置，塔板流体力学性能的校核及绘出塔板的性能负荷图。关键词：气液传质分离精馏浮阀塔Abstract:Currently，themaintransferringequipmentthatusedforgas-liquidseparationistraycolumn.Fortheseparationofbinary,weshoulduseacontinuousprocess.Theadvantagesofthefloatvaluetowerlieintheflexibilityofoperation,efficiencyoftheoperation,pressuredrop,producingcapacity,andequipmentcosts.Itsmainfeatureisthatthereisafloatingvalveontheholeoftheplate,thentheaircancomeintothetrayplateatasteadyrateandmakecontractwiththelevelofliquid,sothattheflowvalvecanfluctuateandcontrolitselfaccordingtothesizeoftheair.Thecalculationsofthedistillationdesigningincludethecalculationofthetowerheight,thetowerdiameter,thesizeofvariouspartsofthetrayandthearrangementofthetray,andthecheckofthehydrodynamicsperformanceofthetray.Andthendrawthedrayloadmap.Keywords：gas-liquidmasstransferrectificationvalvetower目录第一章前言………………………………………………………………………………....31.1精馏及精馏流程...........................................................................................31.2精馏的分类...................................................................................................31.3精馏操作的特点...........................................................................................41.4塔板的类型与选择.......................................................................................41.5相关符号说明...............................................................................................51.6相关物性参数...............................................................................................6第二章设计任务书..........................................................................................................7第三章设计内容................................................................................................................83.1设计方案的确定及工艺流程的说明...........................................................83.2全塔的物料衡算...........................................................................................83.2.1料液及塔顶底产品含苯的摩尔分率.................................................83.2.2平均摩尔质量.....................................................................................83.2.3料液及塔顶底产品的摩尔流率.........................................................93.3塔板数的确定...............................................................................................93.3.1平衡曲线的绘制.................................................................................93.3.2操作回流比的确.................................................................................103.3.3理论塔板数的确定.............................................................................113.4塔的精馏段操作工艺条件及计算...............................................................133.4.1平均压强Pm..................
