摘 要：近年来，全球包括中国对PX及其下游产品的需求一直呈增长趋势，PX供不应求状况日益突出。本设计依托团队工艺设计方案，根据流程模拟与计算数据，在满足工艺要求并充分考虑其经济性的前提下，对塔设备、反应器、换热器、储罐及泵进行了设计、选型和校核研究。设计中甲苯塔采用双溢流浮阀板式塔板，异构化反应器选型为径向绝热固定床反应器，苯产品冷却器型号为G1000-VI-0.6-387.1，单个对二甲苯储罐公称容积为10000 m3，回收塔水抽出泵型号为IS80-50-250。66647

毕业论文关键词：对二甲苯，设备选型，校核

Abstract：In recent years, the demand of PX and its down-stream products from all over the world including China increases rapidly. The tight market situation of shortage becomes serious. Tower equipments, reactors and heat exchangers were designed, lectotype-selected and checked based on the production process of the team, process simulation and computation data. It also meet the premise of technological requirements and take a full consideration of economy. In this design, the toluene tower was double overflow and floating valve tray.  The selected isomerization reactor was the radial adiabatic fixed-bed reactor. The model of the cooler of benzene products was G1000-VI-0.6-387.1. The nominal volume of p-xylene was 10000 m3. The model of extraction pump from recovery tower was IS80-50-250.

Keywords： P-xylene, equipment selection, check

目   录  

1 前言 3

2 塔设备 3

2.1 设计要求 4

2.2 塔选型 4

2.3 塔板类型及性能对比 4

2.4 甲苯精馏塔设计 6

2.4.1 甲苯塔精馏段设计 6

2.4.2 甲苯塔提馏段设计 17

2.4.3 甲苯塔机械工程设计 19

2.5 芳烃抽提塔设计 22

2.5.1 萃取塔设备概述 22

2.5.2 萃取剂选择 23

2.5.3 抽提塔设计 23

2.5.4 其他塔设备一览表 31

3 反应器 31

3.1 选型原则 31

3.2 设计标准 31

3.3 反应器选型 32

3.4 异构化反应器设计 33

3.4.1 催化剂选择 33

3.4.2 反应机理 34

3.4.3 反应器设计 35

3.4.4 反应器参数一览表 38

4 换热器 38

4.1 换热器分类 38

4.2 换热器选型 38

4.2.1 选型原则 38

4.2.2 苯产品冷却器设计 40

4.2.3 其他换热器设备选型一览表 45

5 储罐 46

5.1 储罐分类 46

5.2 储罐标准 46

5.3 储罐技术规格