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Analysis of Two-Phase Pressure Drop in Structured Packings by Computational Fluid Dynamics | ||
| Chemical Process Design | ||
| دوره 1، شماره 1، شهریور 2022، صفحه 27-32 اصل مقاله (1.2 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22111/cpd.2022.42836.1002 | ||
| نویسندگان | ||
| Mortaza Zivdar* 1؛ Saeed shojaie2؛ Mohammad Amin Mokhtari2 | ||
| 1Professor, Shahid Nikbakht Faculty of Engineering, Department of Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran. | ||
| 2Master of Science, Faculty of Engineering, Shahid Nikbakht, Department of Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran | ||
| چکیده | ||
| Packed towers are continuous contact systems in which unlike tray towers, the liquid phase is dispersed, and the gas phase is continuous. Packed or packed distillation towers are widely used in chemical industries. The use of such towers is preferable to tray towers, especially in vacuum distillation operations. These columns are suitable in low pressure-drop or low liquid hold up operations. In this study, the pressure drop for the air-water system was simulated, and presented by a 3D model consisting of two layers of Gempak 2A structured packings by using computational fluid dynamics. Computational Fluid Dynamics is a useful tool for scale-up, design and optimization of chemical engineering equipment for its detailed prediction of hydrodynamic characteristics. The BSL turbulence model was used for simulation. The total number of meshes were 1315200. The simulation results were compared with laboratory and existing experimental data. The simulation error of the two-phase pressure drop compared with experimental data was 16.6%. The results of prediction agree well with the experimental data indicating the suitability of the proposed method for the simulation of the hydrodynamics in structured packed columns. The results of this study can be used in the hydraulic design of packed towers containing structured packings. | ||
| کلیدواژه‌ها | ||
| packed tower؛ structured packings؛ Two-phase pressure drop؛ Gas velocity؛ Liquid velocity؛ Computational fluid dynamics | ||
| مراجع | ||
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[1] Robert E. Treybal., 1968. Mass Transfer Operation, Third Edition, MC Grow Hill, 688 pages, ISBN-10: 0070651892.
[2] Loser, T., Mewes, D., 2001. Numerical calculation of the gas flow in structured packing., 6thWorld Congress of Chemical Engineering Melbourne, Australia, 23-27.
[3] Haghshenas Fard, Massoud, 2006. Investigation of the characteristics of packed towers containing structured packing using CFD analysis, Ph.D. Thesis, University of Sistan and Baluchestan, Department of Chemical Engineering.
[4] Jiangbo, C., Chunjiang, L., Xigang, Y., Guocong, Y., 2009. CFD Simulation of Flow and Mass Transfer in Structured Packing Distillation Columns., Chinese Journal of Chemical Engineering, 17 (3), 381-388. https://doi.org/10.1016/S1004-9541(08)60220-7
[5]. Mazarei Sotoodeh, M., Zivdar, M., Rahimi, R., 2017. CFD Simulation of Dry and Wet Pressure Drops and Flow Pattern in Catalytic Structured Packings, Journal of Chemical and Petroleum Engineering, 51 (1), 27-37. https://doi.org/10.22059/jchpe.2017.62163
[6] Zivdar, M., Shah Mohammadi, A., 2020. CFD Analysis of two-phase pressure drop in structured packings., Farayandno, 15 (69), 24-34. https://doi.org/20.1001.1.17356466.1399.15.69.2.4
[7] Hassanvand, A., Esmaeili-Faraj, S.Y., Moghaddam, M.S., Moradi, M., 2020. Characterization of New Structured Packing by using of computational fluid dynamics., Chemical Engineering & Technology, 44 (1), 156-163. https://doi.org/10.1002/ceat.202000237
[8] Tan, H., Wen, N., Ding, Z., 2021. Computational fluid dynamics simulation of multi-phase flow characteristics in an industrial-scale randomly packed tower., Asia-Pacific Journal of Chemical Engineering., 16 (6). https://doi.org/10.1002/apj.2708
[9]. Shahmohammadi, A., Daneshgar, P., Zivdar, M., 2021. Dry pressure drop analysis in structured pakings by computational fluid dynamics., 17 Iranian National Congress of Chemical Engineering. https://doi.org/10.1016/j.cep.2018.04.034, S0255-2701(18)30165-X,2018
[10] Fernandes, J., Lisboa, P. F., Simoes, P., Mota, J., P. B., Saatdjian, E., 2008. Application of CFD in the study of supercritical fluid extraction with structured packing: Wet pressure drop calculations, The Journal of Supercritical Fluids., 47 (1), 17-24. https://doi.org/10.1016/j.supflu.2008.07.008
[11] Rocha, J., Bravo, J.L., James, R. F., 1993. Distillation column containing structured packings: A comprehensive model for their performance. 1. Hydraulics models., Ind. Eng. Chem. Res, 32 (4), 641-651. https://doi.org/10.1021/ie00016a010 | ||
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