Operation and Control of Divided Wall (Petlyuk) Column

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Presentation transcript:

Operation and Control of Divided Wall (Petlyuk) Column Speaker : Ambari Khanam Course : Master Thesis Department of Chemical Engineering Project-Supervisor : Sigurd Skogestad 16.04.2019

Outline Introduction to Divided Wall Column (DWC) The Thesis work. Need and challenges The Thesis work. - Investigation of all possible modes of operation for DWC - Self-optimizing control scheme for maximizing the product recovery Work done so far Remaining work 16.04.2019

Why DWC? Capital and energy saving (30%) Space saving (30%) Low green house gas emission Can deal with energy crisis scenario Thermal stress reduced 16.04.2019

Challenges Reliable design Operation and Control Only one pressure range possible Higher column height 16.04.2019

Divided Wall Column Discuss degree of freedom, wall, (a) Implementation with three separate columns (b) DWC implementation with a side-product Figure. Thermodynamically equivalent implementations of three-product Petlyuk column 16.04.2019

Modes of Operation 16.04.2019

Optimization Objective function: Minimize the sum of impurities 16.04.2019

Thesis Work: Little modification in the Petlyuk model Finding optimal solution Finding candidates for self-optimizing CV’s 4. Implementation of feedback control. 1. problem, should there be p control, should I start with initial 16.04.2019

Self-optimizing variables Implementing disturbance and re-optimize Loss evaluation work on control structures 16.04.2019

Work done so far Model improvement Verification and results retrieved for previous work Optimization Temperature calculation 16.04.2019

Remaining Tasks Selection of measurement for CVs [T1,T2,T3......................T120,L,S,Vmax] Find a suitable method for the evaluation of loss Feedback control for selected CVs using SIMC. 16.04.2019

Your feedback is welcome ANY question? Your feedback is welcome 16.04.2019