Comparative analysis of different static mixers performance by CFD technique: An innovative mixer

doi:10.1016/j.cjche.2019.09.004

摘要/Abstract

摘要： The flow and mixing behavior of two miscible liquids has been studied in an innovative static mixer by using CFD, with Reynolds numbers ranging from 20 to 160. The performance of the new mixer is compared with those of Kenics, SMX, and Komax static mixers. The pressure drop ratio (Z-factor), coefficient of variation (CoV), and extensional efficiency (α) features have been used to evaluate power consumption, distributive mixing, and dispersive mixing performances, respectively, in all mixers. The model is firstly validated based on experimental data measured for the pressure drop ratio and the coefficient of variation. CFD results are consistent with measured data and those obtained by available correlations in the literature. The new mixer shows a superior mixing performance compared to the other mixers.

关键词: CFD, New static mixer, Coefficient of variation, Pressure drop ratio

Abstract: The flow and mixing behavior of two miscible liquids has been studied in an innovative static mixer by using CFD, with Reynolds numbers ranging from 20 to 160. The performance of the new mixer is compared with those of Kenics, SMX, and Komax static mixers. The pressure drop ratio (Z-factor), coefficient of variation (CoV), and extensional efficiency (α) features have been used to evaluate power consumption, distributive mixing, and dispersive mixing performances, respectively, in all mixers. The model is firstly validated based on experimental data measured for the pressure drop ratio and the coefficient of variation. CFD results are consistent with measured data and those obtained by available correlations in the literature. The new mixer shows a superior mixing performance compared to the other mixers.

Key words: CFD, New static mixer, Coefficient of variation, Pressure drop ratio

M. M. Haddadi, S. H. Hosseini, D. Rashtchian, Martin Olazar. Comparative analysis of different static mixers performance by CFD technique: An innovative mixer[J]. 中国化学工程学报, 2020, 28(3): 672-684.

M. M. Haddadi, S. H. Hosseini, D. Rashtchian, Martin Olazar. Comparative analysis of different static mixers performance by CFD technique: An innovative mixer[J]. Chinese Journal of Chemical Engineering, 2020, 28(3): 672-684.

参考文献

[1] K.J. Myers, A. Bakker, D. Ryan, Avoid agitation by selecting static mixers, Chem. Eng. Prog. 93(1997) 28-38.
[2] T. Bor, The static mixer as a chemical reactor, Br. Chem. Eng. 16(1971) 610-612.
[3] J.R. Baker, Motionless mixers stir up new uses, Chem. Eng. Prog. 87(1991) 32-38.
[4] R.K. Thakur, Ch. Vial, D.P. Nigam, E.B. Nauman, G. Djelveh, Static mixers in the process industries-A review, Chem. Eng. Res. Des. 81(2003) 787-826.
[5] G. Montante, M. Coroneo, A. Paglianti, Blending of miscible liquids with different densities and viscosities, Chem. Eng. Sci. 141(2016) 250-260.
[6] F. Theron, N. Le Sauze, Comparison between three static mixers for emulsification in turbulent flow, Int. J. Multiph. Flow. 37(2011) 488——500.
[7] P. Pianko-Oprych, Z. Jaworski, CFD modelling of two-phase liquid-liquid flow in a SMX static mixer, Pol. J. Chem. Technol. 11(2009) 41-49.
[8] P.D. Berkman, R.V. Calabrese, Dispersion of viscous liquids by turbulent flow in a static mixer, AIChE J. 34(1988) 602-609.
[9] C.U. Ugwu, J.C. Ogbonna, H. Tanaka, Improvement of mass transfer characteristics and productivities of inclined tubular photobioreactors by installation of internal static mixers, Appl. Microbiol. Biotechnol. 58(2002) 600-607.
[10] R. Rakoczy, S. Masiuk, M. Kordas, P. Gradzik, The effects of power characteristics on the heat transfer process in various types of motionless mixing devices, Chem. Eng. Process. 50(2011) 959-969.
[11] S. Rabha, M. Schubert, F. Grugel, M. Banowski, U. Hampel, Visualization and quantitative analysis of dispersive mixing by a helical static mixer in upward co-current gas-liquid flow, Chem. Eng. J. 262(2015) 527-540.
[12] F. Zidouni, E. Krepper, R. Rzehak, S. Rabha, M. Schubert, U. Hampel, Simulation of gas-liquid flow in a helical static mixer, Chem. Eng. Sci. 137(2015) 476-486.
[13] S. Middleman, Fundamentals of Polymer Processing, Mcgraw-Hill, New York, 1977.
[14] E.L. Paul, Design and scaleup of an anchorage-dependent mammalian cell bioreactor, Ann. N. Y. Acad. Sci. 589(1990) 642-649.
[15] Z. Qing-shi, Ozone disinfection of sewage in a static mixer contacting reactor system on a plant scale, Ozone Sci. Eng. 13(1991) 313-330.
[16] N. Martin, C. Galey, Use of static mixer for oxidation and disinfection by ozone, Ozone Sci. Eng. 16(1994) 455-473.
[17] P.B. Clancy, Treatment of chlorinated ethenes in groundwater with ozone and hydrogen peroxide, Environ. Prog. 15(1996) 187-193.
[18] J.H. Kwong, J.H. Jung, H.D. Lee, Y.S. Park, D.W. Kim, Development of a hydrodynamic static mixer for mixing chemicals in ballast water treatment systems, J. Water Process Eng. 8(2015) 209-220.
[19] A. Cybulski, K. Werner, Static mixers-criteria for application and selection, Int. Chem. Eng. 26(1986) 171-180.
[20] J.P. Gingras, L. Fradette, P. Tanguy, J. Bousquet, Inline bitumen emulsification using static mixers, Ind. Eng. Chem. Res. 46(2007) 2618-2627.
[21] A.S. Klett, A.M. Payne, M.C. Thies, Continuous-flow process for the purification and fractionation of alkali and organosolv lignins, ACS Sustain. Chem. Eng. 4(2016) 6689-6694.
[22] M. Rauline, P.A. Tanguy, J.M. Le Blevec, J. Bousquet, Numerical investigation of the performance of several static mixers, Can. J. Chem. Eng. 76(1998) 527-535.
[23] E.B. Nauman, B.A. Buffham, Mixing in continuous flow systems, Chem. Eng. Commun. 29(1983) 369-370.
[24] I. Manas-Zloczower, Studies of mixing efficiency in batch and continuous mixers, Rubber Chem. Technol. 67(1994) 504-528.
[25] S. Shojaee, S.H. Hosseini, A. Rafati, G. Ahmadi, Prediction of the effective area in structured packings by computational fluid dynamics, Ind. Eng. Chem. Res. 50(2011) 10833-10842.
[26] S.H. Hosseini, S. Shojaee, G. Ahmadi, M. Zivdar, Computational fluid dynamics studies of dry and wet pressure drops in structured packings, J. Ind. Eng. Chem. 18(2012) 1465-1473.
[27] S. Liu, A.N. Hrymak, P.E. Wood, Laminar mixing of shear thinning fluids in a SMX static mixer, Chem. Eng. Sci. 61(2006) 1753-1759.
[28] A. Baumann, S.A.K. Jeelani, B. Holenstein, P. Stossel, E.J. Windhab, Flow regimes and drop break-up in SMX and packed bed static mixers, Chem. Eng. Sci. 73(2012) 354-365.
[29] J.M. Zalc, S.E. Szalai, F.J. Muzzio, S. Jaffer, Characterization of flow and mixing in an SMX static mixer, AIChE J. 48(2002) 427-436.
[30] J.M. Zalc, S.E. Szalai, F.J. Muzzio, Mixing dynamics in the SMX static mixer as a function of injection location and flow ratio, Polym. Eng. Sci. 43(2003) 875-890.
[31] D.M. Hobbs, P.D. Swanson, F.J. Muzzio, Numerical characterization of low Reynolds number flow in the Kenics static mixer, Chem. Eng. Sci. 53(1998) 1565-1584.
[32] O. Byrde, M.L. Sawley, Optimization of a Kenics static mixer for non-creeping flow conditions, Chem. Eng. J. 72(1999) 163-169.
[33] E. Saatdjian, A.J.S. Rodrigo, J.P.B. Mota, On chaotic advection in a static mixer, Chem. Eng. J. 187(2012) 289-298.
[34] M. Regner, K. Östergren, C. Träġardh, Effects of geometry and flow rate on secondary flow and the mixing process in static mixers-A numerical study, Chem. Eng. Sci. 61(2006) 6133-6141.
[35] H.S. Song, S.P. Han, A general correlation for pressure drop in a Kenics static mixer, Chem. Eng. Sci. 60(2005) 5696-5704.
[36] E. Fourcade, R. Wadley, H.C.J. Hoefsloot, A. Green, CFD calculation of laminar striation thinning in static mixer reactors, Chem. Eng. Sci. 56(2001) 6729-6741.
[37] P. Joshi, K.D.P. Nigam, E.B. Nauman, The Kenics static mixer:new data and proposed correlations, Chem. Eng. J. 59(1995) 265-271.
[38] M. Rafiee, S. Bakalis, P.J. Fryer, A. Ingram, Study of laminar mixing in kenics static mixer by using Positron Emission Particle Tracking (PEPT), Procedia-Food Science. 1(2011) 678-684.
[39] M.K. Singh, P.D. Anderson, H.E.H. Meijer, Understanding and optimizing the SMX static mixer, Macromol. Rapid Commun. 30(2009) 362-376.
[40] S.S. Soman, C.M.R. Madhuranthakam, Effects of internal geometry modifications on the dispersive and distributive mixing in static mixers, Chem. Eng. Process. 122(2017) 31-43.
[41] H.-B. Meng, M.-Y. Song, Y.-F. Yu, X.-H. Jiang, Z.-Y. Wang, J.-H. Wu, Enhancement of laminar flow and mixing performance in a lightnin static mixer, Int. J. Chem. React. Eng. 15(2016) 20160112.
[42] H. Meng, F. Wang, Y. Yu, M. Song, J. Wu, A numerical study of mixing performance of high-viscosity fluid in novel static mixers with multitwisted leaves, Ind. Eng. Chem. Res. 53(2014) 4084-4095.
[43] H. Meng, J. Zhu, Y. Yu, Z. Wang, J. Wu, The effect of symmetrical perforated holes on the turbulent heat transfer in the static mixer with modified Kenics segments, Int. J. Heat Mass Transf. 99(2016) 647-659.
[44] M. Zhou, D. Bai, Y. Zong, L. Zhao, J.N. Thornock, Numerical investigation of turbulent reactive mixing in a novel coaxial jet static mixer, Chem. Eng. Process. 122(2017) 190-203.
[45] S. Jegatheeswaran, F. Ein-Mozaffari, J. Wu, Process intensification in a chaotic SMX static mixer to achieve an energy-efficient mixing operation of non-newtonian fluids, Chem. Eng. Proc. 124(2018) 1-10.
[46] S. Jegatheeswaran, F. Ein-Mozaffari, J. Wu, Laminar mixing of non-Newtonian fluids in static mixers:process intensification perspective, Rev. Chem. Eng. (2019) https://doi.org/10.1515/revce-2017-0104.
[47] O. Mihailova, D. O'Sullivan, A. Ingram, S. Bakalis, Velocity field characterization of Newtonian and non-Newtonian fluids in SMX mixers using PEPT, Chem. Eng. Res. Des. 108(2016) 126-138.
[48] Z. Jaworski, P. Pianko-Oprych, D.L. Marchisio, A.W. Nienow, CFD modelling of turbulent drop breakage in a Kenics static mixer and comparison with experimental data, Chem. Eng. Res. Des. 85(2007) 753-759.
[49] M.M. Haddadi, S.H. Hosseini, D. Rashtchian, G. Ahmadi, CFD modeling of immiscible liquids turbulent dispersion in Kenics static mixers:focusing on droplet behavior, Chin J. Chem. Eng. (2019) https://doi.org/10.1016/j.cjche.2019.07.020.
[50] M. Al-Atabi, Design and assessment of a novel static mixer, Can. J. Chem. Eng. 89(2011) 550-554.
[51] J. Sir, Z. Lecjaks, Pressure drop and homogenization efficiency of a motionless mixer, Chem. Eng. Commun. 16(1982) 325-334.
[52] R.B. Bird, W.E. Stewart, E.N. Lightfoot, Transport Phenomena, John Wiley & Sons, New York, 2002.
[53] M. Coroneo, G. Montante, A. Pagliant, Computational fluid dynamics modeling of corrugated static mixers for turbulent applications, Ind. Eng. Chem. Res. 51(2012) 15986-15996.
[54] V. Kumar, V. Shirke, K.D.P. Nigam, Performance of Kenics static mixer over a wide range of Reynolds number, Chem. Eng. J. 139(2008) 284-295.
[55] W.L. Wilkinson, M.J. Cliff, An Investigation into the Performance of a Static In-line Mixer, In Second European Conference on Mixing, 1977.
[56] N.F. Shah, D.D. Kale, Two-phase gas-liquid flows in static mixers, AIChE J. 38(1992) 308-310.
[57] C.D. Grace, Static mixing and heat transfer, Chem. Process. Eng. 52(1971) 57-59.
[58] S.H. Hosseini, G. Ahmadi, M. Olazar, CFD simulation of cylindrical spouted beds by the kinetic theory of granular flow, Powder Technol. 246(2013) 303-316.
[59] C. Guenther, M. Syamlal, The effect of numerical diffusion on simulation of isolated bubbles in a gas-solid fluidized bed, Powder Technol. 116(2001) 142-154.
[60] M.D. Das, A.N. Hrymak, M.H.I. Baird, Laminar liquid-liquid dispersion in the SMX static mixer, Chem. Eng. Sci. 101(2013) 329-344.