Application of modern control theory to distillation columns
โ Scribed by Y. C. Hu; W. Fred Ramirez
- Publisher
- American Institute of Chemical Engineers
- Year
- 1972
- Tongue
- English
- Weight
- 724 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0001-1541
No coin nor oath required. For personal study only.
โฆ Synopsis
Modem control theory for systems with load changes is applied to distillation column control. Both linear and nonlinear distillation models are developed and tested. Excellent control is achieved by using an optimal multivariable-proportional-integral (MPI) controller for systems with unmeasurable disturbances. When the disturbances are measurable an optimal multivariable proportional controller with error coordination ( W E ) is desirable. Various structures for distillation control have also been investigated.
CONTROL LAWS
The linear state regulator problem of Kalman and Koepcke was formulated for problems in which initial state
๐ SIMILAR VOLUMES
Sin-mary--The theory developed in part I is applied to the following two-variable control systems for distillation columns: (a) pressure control by condenser cooling, and temperature control by reboiler heating; (b) overhead quality control by reflux, and bottom quality control by reboiler heating.
SmnmarymIn general, multivariable control systems are too complex for even a qualitative description of their behaviour. However, for linear two-variable control systems with two control lOOps, the situation is more favourable. In this article, the influence of one loop on the other is deduced from
## Decoupling Control of a Distillation Column Luyben (1 ) recently discussed the use of linear decoupling control for a binary distillation column. An ideal decoupling and a simplified decoupling approach were presented. A signal flow graph analysis is presented here to show how these two methods