Servicios Personalizados
Revista
Articulo
Indicadores
- Citado por SciELO
- Accesos
Links relacionados
- Similares en SciELO
Compartir
Revista mexicana de ingeniería química
versión impresa ISSN 1665-2738
Rev. Mex. Ing. Quím vol.9 no.3 Ciudad de México dic. 2010
Simulación y control
Modeling the configuration characteristics and operating regimes of a binary distillation column for control
Modelado de las características de configuración y regímenes de operación de una columna de destilación binaria para su control
D. JuárezRomero1*, F.R. LópezEstrada3, C.M. AstorgaZaragoza2, V. Alvarado2, J.A. Hernández1 and A.C. TellezAnguiano2
1 Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col Chamilpa, Cuernavaca, Morelos, México, C.P. 622209. *Corresponding author. Email: djuarezr7@gmail.com
2 Centro Nacional de Investigación y Desarrollo Tecnológico, Interior Internado Palmira s/n, Col. Palmira. Cuernavaca, Morelos, Cuernavaca, Morelos, México. C.P. 62490.
3Instituto Tecnológico de Tuxtla Gutiérrez, Departamento de Ingeniería Eléctrica y Electrónica Carretera panamericana Km 1080 S/N, CP 29000, Tuxtla, Gutiérrez, Chiapas, Mexico.
Recieved 29 of November 2009.
Accepted 12 of October 2010.
Abstract
This work describes a mathematical model for a distillation column which includes mass, composition, and energy balances, where the thermodynamic and equilibrium properties are represented by an equation of state. This model focuses on the specific configuralion of the boiler (container plus boiling vessel, and the vertical condenser (with an external (cooling jacket plus a helical pipe) and also on the effect of atmospheric and subcooling conditions in the condenser. For the sake of flexibility and to represent consistently the semicontinuous conditions during the startup, the equations are solved as a DAEs set. Results are compared with experimental data from a MethanolEthanol mixture in a 10tray distillation column. The effects of configuration and operating conditions on the model fidelity are discussed. The model describes the semicontinuous hydraulics and the desired temperature profile that is expected to be used for process control.
Keywords: distillation column dynamics, condensate subcooling, model fidelity, distillation column configuration.
Resumen
Este trabajo describe un modelo matemático para, una columna de destilación que incluye los balances de masa, composición, y energía, donde las propiedades termodinámicas y de equilibrio están representadas por una ecuación de estado. Este modelo se enfoca a la descripción específica del rehervidor (que tiene un contenedor más un tanque de ebullición) y el condensador vertical (con una chaqueta de enfriamiento externa, más un tubo helicoidal) y también los efectos de las condiciones atmosféricas y de subenfriamiento en el condensador. A fin de tener flexibilidad y para representar consistentemente las condiciones semicontinuas durante el arranque, las ecuaciones son resueltas como un conjunto de EAD. Los resultados son comparados con datos experimentales para una mezcla metanoletanol en una destilación de 10platos. Se discuten los efectos de la configuración y las condiciones de operación en la fidelidad del modelo. El modelo describe la hidráulica semicontinua y el perfil de temperaturas que se espera sea utilizado para control de procesos.
Palabras clave: dinámica de columnas de destilación, subenfriamiento de condensado, fidelidad de modelo, configuración de columna de destilación.
DESCARGAR ARTÍCULO EN FORMATO PDF
References
Agachi P. S., Nagy Z.K., Cristea M.V., ImreLucaci A. (2007) Model Based control Case Studies in Process Engineering. WileyVCH [ Links ]
Alpbaz M., Karacan S., Cabbar Y., Hopoglu H. (2002). Application of model predictive control and dynamic analysis to a pilot distillation column and experimental verification. Chemical Engineering Journal 88, 163 174. [ Links ]
Aspen Technology (2009) Aspen Plus v 7.1, Aspen Dynamics [ Links ]
Archambault J.P., Jaufrret JP., Luyben W.L. (1973). An Experimental Study of the Control of Condensate Subcooling in a Vertical Condenser. AIChE Journal 19, 923928. [ Links ]
Benett D.L, Agrawal R., Cook P.J. (1983). New Pressure Drop Correlation for Sieve Tray Distillation Columns. AIChE Journal 29, (3), 434442 [ Links ]
Biegler L., Grossman I., Westerberg A. (1997). Systematic Methods for Chemical Engineering Design. PrenticeHall [ Links ]
Cingara A., Jovanovic M. (1990). Analytical FirstOrder dynamic model of binary distillation column. Chemical Engineering Science 45, (12), 35853592. [ Links ]
Dutta S., Gualy R. (2000). Robust Reactor Models. Chemical Engineering Progress Oct, 3751. [ Links ]
Eden M. R., Koggersbol A., Hallager L., Jorgensen S. B. (2000). Dynamics and control during startup of heat integrated distillation column. Computers & Chemical Engineering 24, 10911097. [ Links ]
Gani R., Ruiz C. A., Cameron I.T. (1986). A Generalized Model for Distillation ColumnsI Model Description and Applications. Computers & Chemical Engineering 10, (3), 181198. [ Links ]
Gunter A.M. (2003) Dynamic Mathematical Model of a Distillation Column. Ph.D. Thesis, University of Tenesse, Chattanooga. [ Links ]
Kister H.Z. (2002) Can we believe the simulation results? Chemical Engineering Progress, 5258. [ Links ]
Lee J. H. (1998) Modeling and Identification for Nonlinear Model Predictive Control: Requirements, Current Status and Future Research Needs, chapter in Nonlinear Model Predictive Control, Volume 26 of Progress in Systems and Control Theory Series, Birkhauser Verlag, Basel, Switzerland. [ Links ]
Lienhard J. H., Lienhard J. H. (2002). A Heat Transfer TextBook. 3rd Ed, Phlogiston Press, Cambridge Mass. [ Links ]
Luyben W.L. (2004) Quantitative Comparison of Temperature control of Reactors with Jacket Cooling or Internal Cooling Coils. Industrial & Engineering Chemistry Research 43, 26912703. [ Links ]
MartínezSoria C. (2001) Simulacián de la destilación etanol. Agua auxiliado por una bomba de calor por compresiáon mecaánica de vapor. B. Sc. thesis, FCQI, UAEM [ Links ]
Office of Industrial Technologies, Department of Energy, (Feb 2001) Distillation Column Modeling Tools http://www.chemicalvision2020.org/pdfs/industry.pdf [ Links ]
Prausnitz J.M., Eckert C.A., Orye R.V., O'Connell J.P. (1967) Computer calculation for multiphase LiquidVapor Equilibria, Prentice Hall. [ Links ]
Rossiter J. A. (2003) Model Based Predictive Control a Practical Approach, CRC Press. [ Links ]
Ruiz C.A., Cameron I.T., Gani R. (1988). A Generalized Model for Distillation ColumnsIII Study of startup Operation. Computers & Chemical Engineering 12, (1), 114. [ Links ]
Stephan K., Hildwein H. (1987). Recommended Data of Selected Compounds and Binary Mixtures, Vol IV parts 1+2, DECHEMA. [ Links ]
Stryjek R., Vera, J.H. (1986) An Improved PengRobinson Equation of State for Pure Compounds and Mixtures. Canadian Journal of Chemical Engineering 64, 334340. [ Links ]
Wang L., Li P., Giinter W., Wang S. (2003). A startup model for simulation of batch distillation starting from a cold state. Computers & Chemical Engineering 27, (10), 14851497. [ Links ]
Wood R. K, Berry M.W. (1973). Terminal Composition Control of a Binary Distillation Column. Chemical Engineering Science 28, 1707-1717. [ Links ]
Wittgens B., Skogestad S. (2000). Evaluation of Dynamic Models of Distillation Columns with Emphasis on the Initial Response. Modeling, Identification and Control 21, (2), 83 103. [ Links ]
Yip, W. S., Marlin T. (2004) The Effect of Model Fidelity on RealTime Operations Optimization. Computers & Chemical Engineering 28, 267280. [ Links ]