The Dynamic Flexibility of Batch Exothermic Reaction System:Take into Account the Effect of the Initial Operational Temperature

›› 2008, Vol. 16 ›› Issue (6): 916-922.

The Dynamic Flexibility of Batch Exothermic Reaction System:Take into Account the Effect of the Initial Operational Temperature

周华¹, 钱宇¹, 李秀喜¹, 崔健¹, Andrzej Kraslawski²

1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;
2. Department of Chemical Engineering, Lappeenranta University of Technology, FIN-53851, Lappeenranta, Finland

收稿日期:2008-02-12 修回日期:2008-06-30 出版日期:2008-12-28 发布日期:2008-12-28
通讯作者: QIAN Yu,E-mail:ceyuqian@scut.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (20536020, 20876056)

The Dynamic Flexibility of Batch Exothermic Reaction System:Take into Account the Effect of the Initial Operational Temperature

ZHOU Hua¹, QIAN Yu¹, LI Xiuxi¹, CUI Jian¹, Andrzej Kraslawski²

1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;
2. Department of Chemical Engineering, Lappeenranta University of Technology, FIN-53851, Lappeenranta, Finland

Received:2008-02-12 Revised:2008-06-30 Online:2008-12-28 Published:2008-12-28
Supported by:
Supported by the National Natural Science Foundation of China (20536020, 20876056)

摘要/Abstract

摘要： It is shown in this article that by changing the initial operation condition of the batch processes,the dynamic performance of the system can be varied largely,especially for the initial operational temperature of the exothermic reaction.The initial operation condition is often ignored in the designing batch processes for flexibility against disturbances or parameter variations.When the initial condition is not rigid as in the case of a batch reactor, where the initial reaction temperature is quite arbitrary,optimization can also be applied to determine the"best"initial condition to use.Problems for dynamic flexibility analysis of exothermic reaction including initial temperature and process operation can be formulated as dynamic optimization problems.Formulations are derived when the initial conditions are considered or not.When the initial conditions are considered,the initial condition can be transferred into control variables in the first optimal step.The solution of the dynamic optimization is on the basis of Rugge-Kutta integration algorithm and decomposition search algorithm.This method,as illustrated and tested with two highly nonlinear process problems,enables the determination of the optimal level.The dynamic performance is improved by the proposed method in the two exothermic reaction examples.

关键词: batch process, dynamic flexibility, optimization, exothermic reaction

Abstract: It is shown in this article that by changing the initial operation condition of the batch processes,the dynamic performance of the system can be varied largely,especially for the initial operational temperature of the exothermic reaction.The initial operation condition is often ignored in the designing batch processes for flexibility against disturbances or parameter variations.When the initial condition is not rigid as in the case of a batch reactor, where the initial reaction temperature is quite arbitrary,optimization can also be applied to determine the"best"initial condition to use.Problems for dynamic flexibility analysis of exothermic reaction including initial temperature and process operation can be formulated as dynamic optimization problems.Formulations are derived when the initial conditions are considered or not.When the initial conditions are considered,the initial condition can be transferred into control variables in the first optimal step.The solution of the dynamic optimization is on the basis of Rugge-Kutta integration algorithm and decomposition search algorithm.This method,as illustrated and tested with two highly nonlinear process problems,enables the determination of the optimal level.The dynamic performance is improved by the proposed method in the two exothermic reaction examples.

Key words: batch process, dynamic flexibility, optimization, exothermic reaction

周华, 钱宇, 李秀喜, 崔健, Andrzej Kraslawski. The Dynamic Flexibility of Batch Exothermic Reaction System:Take into Account the Effect of the Initial Operational Temperature[J]. , 2008, 16(6): 916-922.

ZHOU Hua, QIAN Yu, LI Xiuxi, CUI Jian, Andrzej Kraslawski. The Dynamic Flexibility of Batch Exothermic Reaction System:Take into Account the Effect of the Initial Operational Temperature[J]. , 2008, 16(6): 916-922.

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The Dynamic Flexibility of Batch Exothermic Reaction System:Take into Account the Effect of the Initial Operational Temperature

The Dynamic Flexibility of Batch Exothermic Reaction System:Take into Account the Effect of the Initial Operational Temperature

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