Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles

doi:10.1016/j.cjche.2018.04.026

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (6): 1423-1429.DOI: 10.1016/j.cjche.2018.04.026

• General reactor • 上一篇下一篇

Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles

Yanhong Zhang, Zhengwei Zhang, Chenwen Wei, Hualin Wang

East China University of Science and Technology, Shanghai 200237, China

收稿日期:2017-09-19 修回日期:2018-04-18 出版日期:2018-06-28 发布日期:2018-08-03
通讯作者: Hualin Wang,E-mail address:wanghl@ecust.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (51308215).

Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles

Yanhong Zhang, Zhengwei Zhang, Chenwen Wei, Hualin Wang

East China University of Science and Technology, Shanghai 200237, China

Received:2017-09-19 Revised:2018-04-18 Online:2018-06-28 Published:2018-08-03
Contact: Hualin Wang,E-mail address:wanghl@ecust.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China (51308215).

摘要/Abstract

摘要： The influence of solid particles size, density and loading on the critical gas-inducing impeller speed was investigated in a gas-liquid-solid stirring tank equipped with a hollow Rushton impeller. Three types of solid particles, hollow glass beads with diameters of 300 μm, 200 μm, 100 μm, and 60 μm, silica gel and desalting resin, were used. It was found that the adding solid particles would change the critical impeller speed. For hollow glass beads and silica gel, whose relative densities were less than or equal to 1.5, the critical impeller speeds increased with the solid loading before reaching the maximum values, and then decreased to a value even lower than that without added solids. The size of the solids also had apparent influence on the critical impeller speed, and larger solid particles correspond to a smaller critical impeller speed. The experimental data also showed that the gasinducing was beneficial to the suspension of the solid particles.

关键词: Critical gas-induction impeller speed Gas-inducting impeller, Gas-liquid-solid, Multiphase reactor, Solid loading

Abstract: The influence of solid particles size, density and loading on the critical gas-inducing impeller speed was investigated in a gas-liquid-solid stirring tank equipped with a hollow Rushton impeller. Three types of solid particles, hollow glass beads with diameters of 300 μm, 200 μm, 100 μm, and 60 μm, silica gel and desalting resin, were used. It was found that the adding solid particles would change the critical impeller speed. For hollow glass beads and silica gel, whose relative densities were less than or equal to 1.5, the critical impeller speeds increased with the solid loading before reaching the maximum values, and then decreased to a value even lower than that without added solids. The size of the solids also had apparent influence on the critical impeller speed, and larger solid particles correspond to a smaller critical impeller speed. The experimental data also showed that the gasinducing was beneficial to the suspension of the solid particles.

Key words: Critical gas-induction impeller speed Gas-inducting impeller, Gas-liquid-solid, Multiphase reactor, Solid loading

Yanhong Zhang, Zhengwei Zhang, Chenwen Wei, Hualin Wang. Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles[J]. Chinese Journal of Chemical Engineering, 2018, 26(6): 1423-1429.

Yanhong Zhang, Zhengwei Zhang, Chenwen Wei, Hualin Wang. Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles[J]. Chin.J.Chem.Eng., 2018, 26(6): 1423-1429.

参考文献

[1] B.N. Murthy, R.B. Kasundra, J.B. Joshi, Hollow self-inducing impellers for gas-liquidsolid dispersion:experimental and computational study, Chem. Eng. J. 141(2008) 332-345.

[2] G.Q. Martin, Inducing agitator, Chem, Process. Des. Dev. 11(1988) 397-404.

[3] J. Baczkiewicz, M. Michalski, Oxygen transfer during mixing of acetic acid fermentation medium of self aspirating tube agitator, 6th European Conference on Mixing, Pavia, Italy, 1988.

[4] G.M. Evans, C.D. Rielly, J.F. Davidson, K.J. Carpenter, A fundamental study of gas inducing impeller design in fluid mixing, IChemE Symp. Ser. 121(1990) 137-152.

[5] G.M. Evans, C.D. Rielly, J.F. Davidson, K.J. Carpenter, Hydrodynamic Characteristic of a Gas Inducing Impeller, Springer, Netherlands, 1992.

[6] C.D. Rielly, G.M. Evans, J.F. Davidson, K.J. Carpenter, Effect of vessel scale-up on the hydrodynamics of a self aerating concave blade impeller, Chem. Eng. Sci. 47(1992) 3395-3402.

[7] S.F. Forrester, C.D. Rielly, Modeling the increased gas capacity of self-inducing impellers, Chem. Eng. Sci. 49(1994) 5709-5718.

[8] S.F. Forrester, C.D. Rielly, K.J. Carpenter, Gas inducing impeller design and performance characteristics, Chem. Eng. Sci. 53(1998) 603-615.

[9] N.A. Deshmukh, S.S. Patil, J.B. Joshi, Gas induction characteristics of hollow selfinducing impeller, Trans. Inst. Chem. Eng. 84(2006) 124-132.

[10] S. Poncin, C. Nguyen, N. Midoux, J. Breysse, Hydrodynamics and volumetric gasliquid mass transfer coefficient of a stirred vessel equipped with a gas-inducing impeller, Chem. Eng. Sci. 49(2002) 5709-5718.

[11] K. Saravanan, V.D. Mundale, J.B. Joshi, Gas inducing type mechanically agitated contactors, Ind. Eng. Chem. Res. 33(19942226-2241.

[12] K. Saravanan, J.B. Joshi, Gas inducing type mechanically contactors:hydrodynamic characteristics of multi impellers, Ind. Eng. Chem. Res. 34(19952499-2514.

[13] S.B. Sawant, J.B. Joshi, Critical impeller speed for the onset of gas induction in gasinducing types of agitated contactors, Chem. Eng. J. 18(1979) 87-91.

[14] S.B. Sawant, J.B. Joshi, V.G. Pangarkar, R.D. Mhaskar, Mass transfer and hydrodynamic characteristics of the Denver type of flotation cells, Chem. Eng. J. 21(1981) 11-19.

[15] C. Koen, B. Pingaud, Development of self-inducing disperser for gas-liquid and liquid-liquid systems, 2nd European Conference on Mixing, 30th March^-1st April, 1977.

[16] S.S. Patil, J.B. Joshi, Stability of gas-inducing type impellers, Can. J. Chem. Eng. 77(1999) 793-803.

[17] S.S. Patil, J.B. Joshi, Optimum design of multiple-impeller self-inducing system, Ind. Eng. Chem. Res. 42(2003) 1261-1265.

[18] R. Achouri, I. Mokni, H. Mhiri, P. Bournot, A 3D CFD simulation of a self inducing pitched turbine downflow, Energy Convers. Manag. 64(2012) 633-641.

[19] Y.H. Zhang, C. Yang, Z.-S. Mao, Large eddy simulation of the gas-liquid flow in a stirred tank, AICHE J. 54(2008) 1963-1974.

[20] E. Launder, D.B. Spalding, Mathematical Models of Turbulence, Academic Press, London, 1972.

[21] F. Ju, Z.M. Cheng, J.H. Chen, X.H. Chu, Z.M. Zhou, P.Q. Yuan, A novel design for a gasinducing impeller at the lowest critical speed, Chem. Eng. Res. Des. 87(2009) 1069-1074.

[22] Th.N. Zwietering, Suspending of solid particles in liquid by agitators, Chem. Eng. Sci. 8(1958244-253.

Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles

Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles

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