分离苯-甲苯混合物的精馏塔设计论文毕业.doc

四川大学化学工程学院
化工原理课程设计
四川大学化工原理课程设计任务书
一、设计任务:
设计题目:分离苯-甲苯混合物的精馏塔设计
给定条件:
原料液:苯-甲苯混合物组成:xF = (摩尔分率,下同)
处理量:F = 12400 kg/h
温度:29 oC
馏出液: 组成:xD =
残液: 组成:xW =
操作压力:常压
二、设计内容:
设计说明书一份,其内容包括
目录
题目及数据
工艺流程选择论证及说明、流程图
主要设备的设计(塔板数、塔径、塔板结构元件及尺寸,流体力学交校核)
塔板布置图,负荷性能图
主要辅助设备的选用与计算(塔顶冷凝器)
三、参考资料:
化工原理设计导论,成都科技大学《化工原理设计导论》编写组,成都科技大学出版社,1994
化工原理,下册,叶世超夏素兰易美桂杨雪峰等编,科学出版社,2002
化工原理(第二版),下册,陈敏恒等,化学工业出版社,2000
化工设备设计基础,化工设备设计基础编写组,上海***,1987
化学工程师手册,***出版社,1999
PERRY化学工程手册(第六版),化学工业出版社,1984
化学工程手册(第二版),时钧等,化学工业出版社,1996
化学工程师简明手册,邓忠等,***出版社,1997
化工生产流程图解,化学工业出版社,
精馏设计、操作和控制,吴俊生等,中国石化出版社,1997
塔型设备基础设计,石油化学工业部编,1975
塔设备设计,上海***,1988
塔的工艺计算,石油化学工业部设计院,1977\
目录
第一章方案选定

操作压力·············································4
进料状态·············································4
加热方式·············································4
冷却剂与出口温度·····································4
回流比的选择·········································4

塔设备的选择·········································4
再沸器,冷凝器等附属设备的安排·······················4

物料的储和输送·······································5
参数的检测和调控·····································5
热能的利用
第二章总体工艺设计计算

原料及产品组成(xF, xD, xW, F)·······················6
全塔总物料衡算······································6
操作温度
·············································6
使进料达到泡点,预热原料液所需热·····················6
相对挥发度(a) ·······································7
最小回流比(Rmin) ·····································7
精馏塔的气、液相负荷及操作线方程·····················8
塔板数的确定
理论塔板数···········································8
实际塔板数···········································10
精馏塔的工艺条件及有关物性数据的计算
平均摩尔质量·········································10
平均密度·············································11
液相平均表面张力·····································12
液相平均黏度········