Hydrodynamics of Sieve Tray Distillation Column Using CFD Simulation

Document Type: Research Paper

Authors

Department of Chemical Engineering, Shahid Nikbakht’s Faculty of Engineering, University of Sistan and Baluchestan, Sistan and Baluchestan, I. R. Iran

Abstract

Sieve trays are widely used in the gas- liquid contactors such as distillation and absorption towers. In this article, a three-dimensional, two phase CFD model using Euler-Euler framework was developed to simulate a distillation tower with two sieve trays. Hydrodynamic simulation of air and water system in different rates of gas phase was carried out and velocity distribution parameters, clear liquid height and froth height were calculated and compared to the experimental data and the literature simulation result. Liquid velocity distributions on the two trays were found to be in relatively good agreement with experimental data. It was found that heights of accumulated liquid in the down-comers are not equal.
 

Keywords


[1] Kister, H. Z.(1992). Distillation Design, McGraw-Hill Inc.

[2] Lockett, M. J.(1986). Distillation Tray Fundamentals, Cambridge University, Cambridge.

[3] Stichlmair, J.G. and Fair, J.R. (1998). Distillation Principles and Practice, Wiley-VCH, New York.

[4] Gesite G. K., Nandakumar, K., Chuang, K. T. (2003). "CFD Modeling of Flow Patterns and Hydraulics of Commercial-Scale Sieve Trays." AIChE. J., Vol. 49, pp. 910-924.

[5] Li, X.G., Liu, D.X., Xu, S.M., Li, H. (2009). "CFD Simulation of Hydrodynamics of Valve Tray." Chem. Eng. Proc.: Process Intensification Vol. 48, pp. 145–151.

[6] Krishna, R., Van Baten, J. M., Ellenberger, J., Higler, A.P., Taylor, R. (1999). "CFD Simulations of Sieve Tray Hydrodynamics." Chem. Eng. Res. Des., Trans. Inst. Chem. Eng., Vol.77, pp. 639–646.

[7] Van Baten, J.M., Krishna, R. (2000). "Modeling Sieve Tray Hydraulics using Computational Fluid Dynamics." Chem. Eng. J., Vol.77, pp. 143–151.

[8] Wang, X.L., Liu, C.J., Yuan, X.G., Yu, K.T. (2004). "Computational fluid dynamic simulation of three-dimensional liquid flow and mass transfer on distillation column trays." Ind. Eng. Chem. Res., Vol. 43, pp.
2556–2567.

[9] Fischer, C. H., and Quarini, G. L. (1998). "Three Dimensional Heterogeneous Modeling of Distillation Tray
Hydraulics." Miami Beach, FL: AIChE annual meeting, November 15–20.

[10] Rahimi, R., Rahimi, M.R., Shahraki, F., Zivdar, M. (2006). "Efficiencies of sieve tray distillation columns by CFD simulation." Chem. Eng. Tech., Vol. 29, pp.326-350.

[11] Noriler, D., Meier, H.F., Barros, A.C., Wolf, M. R. (2008). "Thermal fluid dynamics analysis of gas-liquid flow on a distillation sieve tray." Chem. Eng. J., Vol. 136, pp.133–143.

[12] Malvin, A., Chan, A., Lau, P.L.,(2014). "CFD Study of Distillation Sieve Tray Flow Regimes using the Droplet Size Distribution Technique." J. Taiwan Inst. Chem. Eng., Vol. 45, pp. 1354-1368.

[13] Solari, R. B., Bell, R. L. (1986). "Fluid Flow Patterns and Velocity Distribution on Commerical Scale Sieve Trays.", AIChE J., Vol. 32, pp. 640.

[14] Liu, C. J., Yuan, X. G., Yu, K. T., Zhu, X. J. (2000). "A Fluid Dynamic Model for Flow Pattern on a Distillation Tray." Chem Eng. Sci. Vol. 55, pp. 2287-2294.

[15] Krishna, R., Urseanu, M. I., Van Baten, J. M. and Ellenberger, J. (1999). "Rise Velocity of a Swarm of Large Gas Bubbles in Liquids." Chem. Eng. Sci., Vol. 54, pp.171-183.

[16] Bennet, D. l., Agrawal and Cook, O. J. (1983)." New Pressure Drop Correlation for Sieve Tray Distillation Column." AIChE. J., Vol. 29, pp. 434-442.

[17] Ranade, V. V. (2002). Computational Flow Modeling for Chemical Reactor Engineering, Academic Press.

[18] Solari, R.B., Saez, E., D’apollo, I., Bellet, A. (1982). "Velocity Distribution and Liquid Flow Patterns on Industrial Sieve Trays." Chem. Eng. Commun. Vol. 13, pp. 369–384.

[19] ANSYS CFX 11 User ҆ Guide, (2009). ANSYS, Ltd., Copyright.

[20] Mehta, B., Chuang, K. T. and Nandakumar, K. (1998). "Model For Liquid Phase Flow On Sieve Trays." Chem. Eng. Res. Des. Vol. 76, pp. 843-848.

[21] Rahimi, R., Mazarei, M. and Bahramifar, E. (2008). "The effect of tray geometry on the sieve tray efficiency." Chem. Eng. Sci., Vol. 76, pp. 90-98.

[22] Baniadam, M., Fathikalajahi, J. and Rahimpour, M. R. (2009). "Incorporation of Eulerian- Eulerian CFD framework in Mathematical Modeling of Chemical Absorption of Acid Gases into methyl diethanolamine on sieve trays." Chem. Eng. J., Vol. 151, pp. 286-294.