毕业设计（论文）
题
学生姓名 教学院系 专业年级 指导教师 单 位 辅导教师 单 位
目
年产25万吨苯乙烯工艺设计
学 号
完成日期 2011 年 06 月 10 日
摘要
本文设计主要以年产25万吨苯乙烯为生产目标，针对苯乙烯和乙苯的混合物的分离。进料组成：60%；塔底产品组成＞98%；塔顶产品组成＜2%；常压，泡点进料，筛板塔，冷却剂与蒸汽自选合适条件。
操作条件：年工作300天，每天24小时，总工作时间为24×300=7200小时；设计的基本内容和要求：（1） 完成塔设备主体部分的物料衡算、热量衡算与主要设备设计计算；（2）画出塔设备装配图；（3） 画出带控制点的下艺流程图。
关键词：乙苯，苯乙烯，物料衡算，热量衡算，工艺设计。
Abstract
This paper introduces the design mainly with annual capacity of 250000 tons of styrene as production goals, styrene and the mixture of ethyl benzene in separation. Incoming material composition: 60%; > 98% of the bottom and the products; Top product component < 2%; Atmospheric pressure and bubble point feeding, sieve plate tower, the coolant and steam customize suitable conditions.
Operating conditions: years work 300 days, 24 hours a day, total working time for 24×300 = 7200 hours; The basic design content and requirements: (1) complete tower of material balance in the main part of the equipment is, heat balance calculations and major equipment design calculation; (2) draw tower assembly equipment; (3) draw with the control points under the flow chart of art.
Keywords: ethyl benzene, styrene, material calculation, heat balance calculations, process design.
目录
1 绪论 ................................................................................................................................... 1
1.1 乙苯的性质与用途 ................................................................................................. 1 1.2 苯乙烯精馏操作条件 ............................................................................................. 2 1.3 各种苯乙烯的生产工艺及比较 ............................................................................. 2 1.4 世界苯乙烯的生产与发展 ..................................................................................... 4
1.4.1 生产情况 ....................................................................................................... 4 1.4.2 发展前景 ....................................................................................................... 5 1.5 我国苯乙烯的发展前景与现状 ............................................................................. 5
1.5.1 生产现状 ....................................................................................................... 5 1.5.2 发展前景 ....................................................................................................... 6
2 苯乙烯主要生产工艺说明 ............................................................................................... 7
2.1 产品及原料性能 ..................................................................................................... 7
2.1.1 苯乙烯 ........................................................................................................... 7 2.1.2 乙苯 ............................................................................................................... 8 2.1.3 二乙苯 ........................................................................................................... 9 2.1.4 三乙苯 ........................................................................................................... 9 2.1.5 烃化液 ........................................................................................................... 9 2.1.6 辅料 ............................................................................................................. 10 2.2 苯乙烯生产原理 ................................................................................................... 11
2.2.1 烷基化反应（烃化） ................................................................................. 11 2.2.2 乙苯脱氢反应 ............................................................................................. 11 2.3 苯乙烯生产流程评述 ........................................................................................... 12
2.3.1 烃化工段 ..................................................................................................... 12 2.3.2 乙苯精馏工段 ............................................................................................. 12 2.3.3 乙苯脱氢 ..................................................................................................... 13 2.3.4 苯乙烯精馏工段 ......................................................................................... 13
3 工艺计算 ......................................................................................................................... 14
3.1 物料衡算 ............................................................................................................... 14
3.1.1 原始数据 ..................................................................................................... 14
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