分离苯甲苯混合液的浮阀板式精馏塔工艺设计.doc

化工原理及化工机械基础课程设计

分离苯-甲苯
混合液地浮阀板式精馏塔工艺设计
中文摘要:
目前用于气液分离地传质设备主要采用板式塔,对于二元混合物地分离,、塔板效率、压降、,气流从浮阀周边以稳定地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地大小上下浮动,、塔径、塔板各部分尺寸地设计计算,塔板地布置,塔板流体力学性能地校核及绘出塔板地性能负荷图.
关键词: 气液传质分离精馏浮阀塔
Abstract: Currently,the main transferring equipment that used for gas-liquid separation is tray column. For the separation of binary, we should use a continuous process. The advantages of the float value tower lie in the flexibility of operation, efficiency of the operation, pressure drop, producing capacity, and equipment costs. Its main feature is that there is a floating valve on the hole of the plate, then the air e into the tray plate at a steady rate and make contract with the level of liquid, so that the flow valve can fluctuate and control itself according to the size of the air. The calculations of the distillation designing include the calculation of the tower height, the tower diameter, the size of various parts of the tray and the arrangement of the tray, and the check of the hydrodynamics performance of the tray. And then draw the dray load map.
Key words:gas-liquid mass transfer rectification valve tower
目录
第一章前言………………………………………………………………………………....3
精馏及精馏流程 3
精馏地分类 3
精馏操作地特点 4
塔板地类型与选择 4
相关符号说明 5
相关物性参数 6
第二章设计任务书 7
第三章设计内容 ..8
设计方案地确定及工艺流程地说明 8
全塔地物料衡算 8
料液及塔顶底产品含苯地摩尔分率 8
平均摩尔质量 8
料液及塔顶底产品地摩尔流率 .9
塔板数地确定 9
平衡曲线地绘制....................... ..........................................................9
操作回流比地确.................................................................................10
理论塔板数地确定.............................................................................11
塔地精馏段操作工艺条件及计算...............................................................13
平均压强Pm.........................................................................................13
平均温度Pm..........