二异丁烯反应精馏生产过程控制策略设计

摘要二异丁烯是一种重要的化工中间体，近年来研究者提出了以催化裂化C₄为原料、采用反应精馏技术同时生产高纯二异丁烯和汽油添加剂的新工艺。由于反应精馏过程中非线性程度高，稳定控制困难，使得采用反应精馏技术生产二异丁烯过程的控制策略研究较少。采用Aspen dynamic软件进行动态模拟，针对反应精馏生产二异丁烯过程开发了温度控制方案、组分温度联合控制方案和组分温度串级控制方案。对3个控制系统进行（±10）%的进料流量扰动和（±5）%组成扰动测试并进行对比。结果表明：组分温度串级控制方案在添加扰动的情况下依然保证了二异丁烯质量分数99%，三异丁烯质量分数小于10%以及异丁烯转化率大于99%的要求，并且最终稳定时间约5 h，具有更好的抗干扰性能。研究结果能够为二异丁烯产品的生产工艺工业化应用提供设计依据。

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	陈自浩
	张自生
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	高鑫
	李鑫钢

关键词：二异丁烯反应精馏过程控制串级控制计算机模拟

Abstract： Diisobutylene (DIB) is an excellent chemical intermediate. Recently, a new process of producing DIB in high purity and gasoline additive from FCC C₄ by reactive distillation has been proposed. And the research on the control strategy of the DIB production process by reactive distillation technology is still in its infancy since it is complicated to control the stability for reactive distillation due to its high degree of nonlinearity. Aspen dynamic software was used for dynamic simulation. The temperature control scheme, component temperature joint control scheme and component temperature cascade control scheme were developed for DIB production by reactive distillation. The three control systems were tested and compared with (±10)% feed flow disturbance and (±5)% composition disturbance. Results show that the component temperature cascade control scheme performs better which ensures the requirements that the purity of DIB is 99%, the purity of triisobutylene is less than 10%, and the conversion rate of isobutylene is greater than 99%. And the final stable time is about 5 h. The research results can provide a basis for the industrial application of the DIB production process.

Keywords： diisobutylene； reactive distillation； process control； cascade control； computer simulation

Received 2021-02-26;

Fund:国家重点研发计划项目（2018YFB0604900）。

Corresponding Authors: 高鑫,教授,E-mail:gaoxin@tju.edu.cn。 Email: gaoxin@tju.edu.cn

About author: 陈自浩(1996-),男,硕士研究生,研究方向为异丁烯二聚反应精馏过程设计。

引用本文:

陈自浩, 张自生, 周金波, 李长明, 李洪, 高鑫, 李鑫钢.二异丁烯反应精馏生产过程控制策略设计[J]. 化学工业与工程, 2022,39(2): 117-127

CHEN Zihao, ZHANG Zisheng, ZHOU Jinbo, LI Changming, LI Hong, GAO Xin, LI Xingang.Design of control scheme for diisobutylene production by reactive distillation[J]. Chemcial Industry and Engineering, 2022,39(2): 117-127

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