Thermal-coupling-oriented integrated control and optimization of distillation process

doi:10.3969/j.issn.0438-1157.2013.12.007

CIESC Journal ›› 2013, Vol. 64 ›› Issue (12): 4319-4324.DOI: 10.3969/j.issn.0438-1157.2013.12.007

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Thermal-coupling-oriented integrated control and optimization of distillation process

LV Wenxiang^1,2, ZHANG Jinzhu³, JIANG Benben^1,2, LUAN Zhiye^1,2, HUANG Dexian^1,2

1. Department of Automation, Tsinghua University, Beijing 100084, China;
2. Tsinghua National Laboratory for Information Science and Technology, Beijing 100084, China;
3. Cangzhou Petrochemical Company, Sinopec, Cangzhou 061000, Hebei, China

Received:2013-07-01 Revised:2013-07-10 Online:2013-12-05 Published:2013-12-05
Supported by:
supported by the National Basic Research Program of China (2012CB720505) and the High-tech Research and Development Program of China (2013AA040702).

面向热集成耦合的精馏过程集成控制与优化

吕文祥^1,2, 张金柱³, 江奔奔^1,2, 栾志业^1,2, 黄德先^1,2

1. 清华大学自动化系, 北京 100084;
2. 清华信息科学与技术国家实验室, 北京 100084;
3. 中石化沧州石化分公司, 河北沧州 061000

通讯作者: 吕文祥
作者简介:吕文祥（1979- ），男，博士，工程师。
基金资助:
国家重点基础研究发展计划项目（2012CB720505）；国家高技术研究发展计划项目（2013AA040702）。

Abstract

Abstract: For the distillation process with heat exchange between the bottoms and the feed,the analysis based on both the first principle and the flowsheet simulation software are proceeded to reveal the couple among the reboiling duty,the liquid level of the bottom and the temperature of the feed,and then a novel thermal-coupling-oriented integrated control and optimization strategy is proposed.In this integrated strategy,the reboiling duty is used to compensate the change of the temperature of the raw material and ensure the quality of the products.The strategy is applied on a practical distillation process,and the coordinated control problem between the flow rate of the bottoms and the reboiling duty is solved with great decrease of the standard errors of key variables.

Key words: distillation, process control, optimization, thermal coupling, coordinated control

摘要： 针对具有塔底产品和进料换热热集成的精馏过程，通过机理分析和基于流程模拟软件的仿真分析，说明了再沸热负荷与塔底液位、进料温度等变量的耦合关系，提出了一种面向热集成耦合的集成控制和优化策略，使用再沸热负荷对原料的焓值变化进行补偿，并兼顾塔底液位，保证产品质量合格。集成策略在实际装置上进行了应用研究，解决了塔底产品流量与再沸热负荷之间的协调控制问题。

关键词: 蒸馏, 过程控制, 优化, 热耦合, 协调控制

CLC Number:

TP273

LV Wenxiang, ZHANG Jinzhu, JIANG Benben, LUAN Zhiye, HUANG Dexian. Thermal-coupling-oriented integrated control and optimization of distillation process[J]. CIESC Journal, 2013, 64(12): 4319-4324.

吕文祥, 张金柱, 江奔奔, 栾志业, 黄德先. 面向热集成耦合的精馏过程集成控制与优化[J]. 化工学报, 2013, 64(12): 4319-4324.

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Thermal-coupling-oriented integrated control and optimization of distillation process

面向热集成耦合的精馏过程集成控制与优化

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