CFD Simulation of Concap Tray Hydrodynamics

Authors

1 Department of Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran

2 Department of Mechanical Engineering, University of Hormozgan,BandarAbbas, Iran

Abstract

This research includes both experimental and CFD investigation in the hydrodynamic behavior of a new type of column tray introduced as “Concap” tray. The proposed column tray is used in contactor columns especially in stripping columns. The hydrodynamics of this Concap tray is investigated in a 1.2m in diameter column. Using air-water system, the experiments were performed for different liquid and vapor loads at constant ambient temperature and pressure. The clear liquid height and total pressure drop were measured. The results were compared with the experimental data of a valve tray in the same column simulator rig. The total pressure drop and clear liquid height of Concap tray were similar to a valve tray, having equal 14% open holes area. Liquid velocity distribution on the tray has been predicted by CFD and is reported.

Keywords


[1] Wesselingh, J.A. and Krishna, R. (2000). Mass Transfer in Multicomponent Mixtures. Delft University Press.

[2] Kister, H.Z. (1992 ). Distillation Design. McGraw-Hill, New York.

[3] Gesit, G., Nandakumar, K. and Chuang, K.T. (2003). “CFD modeling of flow patterns and hydraulics of commercial-scale sieve trays.” AIChE J., Vol. 49, pp.910–924.

[4] Solari, R.B. and Bell, R.L. (1986). “Fluid Flow Patterns and Velocity Distribution onCommercial-Scale Sieve Trays.” AIChE J., Vol. 32, pp. 640-649.

[5] Rahimi, R., Rahimi, M.R., Shahraki, F. and Zivdar, M. (2006). “Efficiencies of sieve tray distillation columns by CFD simulations.”Chem.  Eng. Technol., Vol. 29, No. 3, pp. 326-335.

[6] Li, X.G., Liu, D. X., Xu, S. M. and Li, H. (2009). “CFD simulation of hydrodynamics of valve tray.” Chem.l Eng. Process.: Process Intensification, Vol. 48, pp. 145-151.

[7] Zarei, T., Rahimi, R. and Zivdar, M. (2009). “Computational fluid dynamic simulation of MVG tray hydraulics.”Korean J. Chem. Eng., Vol.26, No. 5, pp. 1213-1219.

[8] Zarei, A., Rahimi, R., Zarei, T. and Naziri, N. (2010) “A study on sieve tray lower operating limit” Distillation Absorption conference, Netherland, Eindhoven, pp. 479-484.

[9] Fischer, C.H. and Quarini, J.L. (1998) “Three-dimensional heterogeneous modeling  of distillation tray hydraulics.” AIChE Meeting, Miami Beach, FL

[10] CFX User Manual, ANSYS, Inc. Modeling, CFX 11.0: Solver

[11]  Rahimi,  R.,  Ameri,  A.  and Setoodeh,  N. (2011).  "Effect  of  Inlet Downcomer  on  the Hydrodynamic  Parameters  of Sieve  Trays  Using CFD  Analysis."J.  Chem.  Petrol.  Eng., Vol. 45, No. 1, pp. 27- 38.