The Effect of Sparger Geometry on Gas Bubble Flow Behaviors Using Electrical Resistance Tomography

Abstract

Key words: bubble column, flow behavior, electrical resistance tomography

摘要： By electrical resistance tomography (ERT) the cross sectional profiles of gas hold-up in a ?56mm bubble column are obtained with four designs of gas sparger. The effect of sparger geometry on the bubble distribution is re-vealed by applying a sensitivity conjugated gradients reconstruction method (SCG). Experimental results show that over-all hold-up obtained by ERT is generally in good agreement with those measured with the pressure transducer and the ERT system produces informative evidence that the radial profiles of hold-up is very similar to the sparger design in the lower section of bubble column. Meanwhile, the rise velocity of bubble swarm and the Sauter mean bubble size are evaluated using ERT based on dynamic gas disengagement theory. The experimental results are in good agreement with correlations and conventional estimation obtained using pressure transmitter methods.

关键词: bubble column;flow behavior;electrical resistance tomography

JINHaibo(靳海波),M.WangbandR.A.Williamsb. The Effect of Sparger Geometry on Gas Bubble Flow Behaviors Using Electrical Resistance Tomography[J]. .

JINHaibo(靳海波),M.WangbandR.A.Williamsb. The Effect of Sparger Geometry on Gas Bubble Flow Behaviors Using Electrical Resistance Tomography[J]. CIESC Journal.

References

1    Deckwer, W.D., Bubble Column Reactors, John Wiley, Chichester (1992).
2    Nigam, K.D.P., Schumpe, A., Three-phase Spargered Reactors, Gordon ? Breach, Amsterdam (1996).
3    Dudukovic, M.P., “Opaque multiphase reactors: Experi-mentation, modelling and troubleshooting”, Oil Gas Sci. Technol., 55(2), 135—158 (2000).
4    Jin, H., Yang, S., Zhang, T., Tong, Z., “Bubble behaviour of a large-scale bubble column with elevated pressure”, Chem. Eng. Technol., 27(9), 1007—1013 (2004).
5    Jin, H., Yang, S., He, G., Guo, Z., Tong, Z., “An experi-mental study of holdups in large-scale p-xylene oxidation reactor using gamma-ray attenuation approach”, Chem. Eng. Sci., 60, 5955—5961(2005).
6    Reinecke, N., Petritsch, G., Schmitz, D., Mewes, D., “Tomographic measurement techniques-visualization of multiphase flows”, Chem. Eng. Technol., 21, 7—18 (1998).
7    Xie, C.G., Reinecke, N., Beck, M.S., Mewes, D., Wil-liams, R.A., “Electrical tomography techniques for proc-ess engineering applications”, Chem. Eng. J., 56, 127—133 (1995).
8    Veera, V.P., “Gamma ray tomography design for the measurement of hold-up profiles in two-phase bubble columns”, Chem. Eng. J., 81, 251—260 (2001).
9    Shollenberger, K.A., Torczynski, J.R., Adkins, D.R., “Gamma-densitometry tomography of gas holdup spatial distribution in industrial scale bubble columns”, Chem. Eng. Sci., 52(3), 2037—2048 (1997).
10    Schmitz, D., Mewes, D., “Topographic imaging of tran-sient multiphase flow in bubble columns”, Chem. Eng. J., 77, 99—104 (2000).
11    Fransolet, E., Crine, M., L’Homme, G., Toye, D., Mar-chot, P., “Analysis of electrical resistance tomography measurements obtained on a bubble column”, Measure-ment Sci. Technol., 12, 1055—1060 (2001).
12    Wang, M., Dorward, A., Vlaev, D., Mann, R., “Meas-urement of gas-liquid mixing in a stirred vessel using electrical resistance imaging”, Chem. Eng. J., 77, 93—98 (2000).
13    George, D.L., Torczynski, J.R., Shollenberger, K.A., O’Hern, T.J., Ceccio, S.L., “Validation of electri-cal-impedance tomography for measurements of material distribution in two-phase flows”, Int. J. Multiphase Flow, 26, 549—581 (2000).
14    Wang, M., Mann, R., Dickin, F.J., “Electrical resistance tomography sensing system for industrial applications”, Chem. Eng. Commun., 175, 49—70 (1999).
15    Wang, M., “Inverse solutions for electrical impedance tomography based on conjugate gradients methods”, Measurement Sci. Technol., 13, 101—117 (2002).
16    Lucas, G.P., Cory, J., Waterfall, R., Loh, W.W., dickin, F.J., “Measurement of the solid volumn fraction and ve-locity distribution in solid-liquid flows using dual-plane electrical resistance tomography”, J. Flow Measurement Instrum., 10(4), 249—258 (1999).
17    Zhang, T., Jin, H., Yang, S., Tong, Z., “Application of pressure transducing technology to measurement of hy-drodynamics in bubble column”, J. Chem. Ind. Eng. (China), 55(3), 476—480 (2004). (in Chinese)
18    Jin, H., Wang, M., Williams, R.A., “Analysis of the ris-ing velocity of bubble swarm and Sauter mean bubble size in bubble columns using electrical resistance tomo-graphy”, In: Proceedings of 4th World Congress on In-dustrial Process Tomography, Jong, A., Takei, M., Wil-liams, R.A., Zeidan, M., Eds., Aizu, Japan, 831—836 (2005).
19    Mendelson, H.D., “The prediction of bubble terminal velocities from wave theory”, AIChE J., 13, 250—253(1967).
20    Akita, K., Yoshida, F., “Bubble size, interfacial area and liquid-phase mass transfer coeffeicent in bubble col-umns”, Ind. Eng. Chem., Proc. Des. Dev., 13, 84—91(1974).
21    Wilkinson, P.M., Haringa, H., “Mass transfer and bubble size in a bubble column under pressure”, Chem. Eng. Sci., 49, 1417—1427(1994).

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