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

LV Wenxiang; ZHANG Jinzhu; JIANG Benben; LUAN Zhiye; HUANG Dexian

doi:10.3969/j.issn.0438-1157.2013.12.007

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

更新时间：2025-12-10

- Thermal-coupling-oriented integrated control and optimization of distillation process
- CIESC Journal Issue 12, Pages: 4319-4324(2013)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.12.007
  CLC： P273
- Online First：05 December 2013，
  
  Published：05 December 2013
- 稿件说明：
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LV Wenxiang, ZHANG Jinzhu, JIANG Benben, et al. Thermal-coupling-oriented integrated control and optimization of distillation process[J]. CIESC Journal, 2013, (12): 4319-4324.
DOI：

LV Wenxiang, ZHANG Jinzhu, JIANG Benben, et al. Thermal-coupling-oriented integrated control and optimization of distillation process[J]. CIESC Journal, 2013, (12): 4319-4324. DOI： 10.3969/j.issn.0438-1157.2013.12.007.

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。

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.

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