四川理工学院毕业论文
Aspen-plus模拟甲苯脱烷基制苯过程
学    生:＊＊＊
学    号:1＊**＊
专    业：化学工程与工艺
班    级：＊＊＊**
指导老师：＊*＊＊
四川理工学院材料与化学工程学院
二〇一五年 六月


摘 要
本文基于甲苯加氢热解法（HDA）脱烷基制苯工艺，建立了Aspen Plus全流程模拟模型。模型包括混合器、预热器、反应器、精馏塔等模块。设定操作参数后,通过灵敏度分析工具对操作参数进行优化，提高了产品质量，降低了能耗。
通过对全流程模拟分析，提出了增加变压吸附(PSA）过程来回收循环气中氢气。采用该过程后,循环气中甲烷含量大大减少，循环气中氢气质量分数达95%，高于原料氢气质量分数。
苯塔是分离工段能耗最大的塔，通过对苯塔进行热泵精馏技术的模拟应用,考察了热泵精馏的节能效果。采用以塔顶气相为换热介质的塔顶气相压缩式热泵节能效果达74%。采用以循环水为换热介质的闭式热泵节能效果达68%.结果表明热泵精馏技术是很有应用前景的节能措施。
关键词：HDA；Aspen Plus;优化；流程改造
Abstract
Based on the pyrolysis (HDA) process， the establishment of Aspen Plus simulation model of the whole process. The model includes a mixer, a preheater, reactor, distillation and other modules。 After setting the operating parameters， sensitivity analysis tool to optimize the operating parameters, improve product quality and reduce energy consumption.
Through the whole process simulation analysis, the increase in pressure swing adsorption (PSA) process to be recycled and the hydrogen gas。 With this process， the cycle gas methane content significantly reduced cycle gas hydrogen mass fraction of 95％, higher than the hydrogen content of raw materials。
Benzene tower is the most energy intensive separation section column by benzene distillation tower heat pump technology analog applications, investigated heat distillation energy savings。 Using the heat transfer medium to the overhead vapor overhead vapor compression heat pump energy—saving effect of 74％. The use of water as a heat transfer medium to circulate in a closed heat pump energy—saving effect of 68%. The results show that energy—saving measures heat pump distillation technology is very promising。
Keywords:HDA;Aspen Plus;Optimization;Process reform

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