Abstract
This paper presents the integration of active disturbance rejection control (ADRC) with soft sensors for enhancing the composition control performance in a distillation column. Static and dynamic soft sensors are developed to estimate the top and bottom product compositions using multiple tray temperatures. In order to cope with the collinearity issues in tray temperature measurements, static and dynamic principal component regression is used in developing the soft sensors. The soft sensor outputs are introduced as the feedback signals to ADRC. This control scheme is termed as “inferential ADRC control”. Static control offsets are eliminated through mean updating in the soft-sensor models. The effectiveness of the proposed control scheme is demonstrated on a benchmark simulated methanol-water distillation column.
Funder
Petroleum Development of Oman
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference30 articles.
1. Optimization of operating conditions of distillation columns: An energy saving option in refinery industry;Fazlali;Songklanakarin J. Sci. Technol.,2009
2. Hewitt, G., Quarain, J., and Morell, M. (1999). More efficient distillation. Chem. Eng., 16–18. Available online: https://www.osti.gov/etdeweb/biblio/20016386.
3. A control perspective on process intensification in dividing-wall columns;Kiss;Chem. Eng. Process. Process Intensif.,2011
4. Distillation technology-still young and full of breakthrough opportunities;Kiss;J. Chem. Technol. Biotechnol.,2013
5. Brockett, R. (2001). New Issues in the Mathematics of Control, Springer.