Energy saving in batch distillation for separation of ternary zeotropic mixture integrated with vapor recompression scheme: dynamics and control
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Gandu Radhika
und
Uday Bhaskar Babu Gara
Abstract
In this work, tight composition control and in parallel the operation is integrated with vapor recompression scheme (VRC) is proposed to achieve energy savings and maximum product at a specified high purity for the separation of ternary zeotropic mixture in batch distillation. Firstly, the model representing a ternary system of hexanol/octanol/decanol has been simulated to analyze the open-loop and close-loop dynamics of the process. Secondly, the open-loop and closed-loop operations are integrated with single stage VRC scheme to achieve energy savings. Single stage VRC is operated at very high compression ratio (CR) due to the large temperature difference of the top and bottom streams in batch distillation column. To further improve the thermodynamic efficiency of single stage VRC, double stage compression without intercoolers between the stages of VRC is proposed. Two control schemes have been implemented for constant composition, namely proportional integral (PI) controller and nonlinear gain scheduling proportional integral (GSPI) with and without VRC in closed-loop. The results shows that double stage VRC with GSPI algorithm provides better performance than conventional in terms of energy, product amount and Integral Square Error (ISE).
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2020 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Editorial
- Editorial special section: selected extended papers from an International Conference on Energy and Environmental Technologies for Sustainable Development (CHEM-CONFLUX20)
- Research Articles
- Model based control strategies to control voltage of Proton Exchange Membrane Fuel Cell
- Nested control loop configuration for a three stage biological wastewater treatment process
- Energy saving in batch distillation for separation of ternary zeotropic mixture integrated with vapor recompression scheme: dynamics and control
- Pyrolysis of corn cob: physico-chemical characterization, thermal decomposition behavior and kinetic analysis
- Decolorization of Reactive Black B from wastewater by electro-coagulation: optimization using multivariate RSM and ANN
- Numerical simulation of the effect of baffle cut and baffle spacing on shell side heat exchanger performance using CFD
Artikel in diesem Heft
- Frontmatter
- Editorial
- Editorial special section: selected extended papers from an International Conference on Energy and Environmental Technologies for Sustainable Development (CHEM-CONFLUX20)
- Research Articles
- Model based control strategies to control voltage of Proton Exchange Membrane Fuel Cell
- Nested control loop configuration for a three stage biological wastewater treatment process
- Energy saving in batch distillation for separation of ternary zeotropic mixture integrated with vapor recompression scheme: dynamics and control
- Pyrolysis of corn cob: physico-chemical characterization, thermal decomposition behavior and kinetic analysis
- Decolorization of Reactive Black B from wastewater by electro-coagulation: optimization using multivariate RSM and ANN
- Numerical simulation of the effect of baffle cut and baffle spacing on shell side heat exchanger performance using CFD
