HYDRODYNAMIC STUDIES IN TWO-PHASE STIRRED FLUIDIZED BED WITH THREE TYPES OF IMPELLERS Original scientific paper

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N. DEEPA PRIYA
K. SARAVANAN

Abstract

Fluidized beds are extensively used in petrochemical, chemical process indus­tries, pharmaceutical, food and biotechnology industries. They are preferred to process materials with a wide range of particle size distribution and offer even temperature distribution and excellent heat and mass transfer. To improve the quality of the fluidized bed, mechanical stirring can be employed along with aeration. Hence, an attempt was made to study the hydrodynamics of stirred fluidized bed using air-water system. The characteristics of the fluidized bed can be well understood by studying its hydrodynamics. Pressure drop is one of the vital factors which affect the performance of fluidized bed. Hence, the effects of gas velocity and stirrer speed on pressure drop and power were studied for both stirred and unstirred bed conditions. It was observed that pres­sure drop and power increases with increase in gas velocity and stirrer speed. Also, the pressure drop and power are lower for the stirred bed condition than the unstirred bed condition.

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How to Cite
DEEPA PRIYA, N., & SARAVANAN, K. (2021). HYDRODYNAMIC STUDIES IN TWO-PHASE STIRRED FLUIDIZED BED WITH THREE TYPES OF IMPELLERS: Original scientific paper. Chemical Industry & Chemical Engineering Quarterly, 27(2), 107–112. https://doi.org/10.2298/CICEQ200305029D
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References

Y. Han, J.-J. Wang, X.-P. Gu, L.-F. Feng, G.-H. Hu, Homogeneous fluidization of Geldart D particles in a gas–solid fluidized bed with a frame impeller, Ind. Eng. Chem. Res. 51 (2012) 16482-16487

J.R. van Ommen, J.M. Valverde, R. Pfeffer, Fluidization of nanopowders: a review, J. Nanoparticle Res. 14 (2012) 737

N. Kuipers, E. Stamhuis, A. Beenackers, Fluidization of potato starch in a stirred vibrating fluidized bed, Chem. Eng. Sci. 51 (1996) 2727-2732

J. Murthy, P. Sekhar, K. Haritha, P. Balaram, S. Anjani, Hydrodynamic Characteristics of Stirred Gas-solid Fluidized Beds, J.-Ins. Eng. India Part CH Chem. Eng. Divis. (2003) 39-44

W.-C. Yang, Handbook of fluidization and fluid-particle systems, CRC press, Boca Raton, FL, 2003

W. Nowak, Fluidization and heat transfer of fine particles in an acoustic field, AIChE Symp. Ser., 1993, pp. 137-149

R.E. Rosensweig, Fluidization: Hydrodynamic stabiliz-ation with a magnetic field, Science 204 (1979) 57-60

I. Puspasari, M.Z.M. Talib, W.R.W. Daud, S.M. Tasirin, Drying kinetics of oil palm frond particles in an agitated fluidized bed dryer, Dry. Technol. 30 (2012) 619-630

I. Puspasari, M.Z.M. Talib, W.R.W. Daud, S.M. Tasirin, Fluidization characteristics of oil palm frond particles in agitated bed, Chem. Eng. Res. Des. 91 (2013) 497-507

C. Sobrino, J.A. Almendros-Ibáñez, D. Santana, M. De Vega, Fluidization of Group B particles with a rotating distributor, Powder Technol. 181 (2008) 273-280

T. Zhou, H. Kage, S. Funaoka, H. Ogura, Y. Matsuno, Fluidization behavior of glass beads under different vibration modules, Adv. Powder Technol. 12 (2001) 559-575

X. Xu, J. Chen, Z. Luo, L. Tang, Y. Zhao, B. Lv, Y. Fu, C. Chen, Fluidization characteristics of air dense medium agitated separation fluidized bed with different distributors, Min. Proc. Ext. Met. Rev. 40 (2019) 299-306

H. Nakamura, T. Kondo, S. Watano, Improvement of particle mixing and fluidization quality in rotating fluidized bed by inclined injection of fluidizing air, Chem. Eng. Sci. 91 (2013) 70-78

Y.-K. Chang, I.-P. Chang, Method development for direct recovery of lysozyme from highly crude chicken egg white by stirred fluidized bed technique, Biochem. Eng. J. 30 (2006) 63-75

K.-H. Chen, S.-Y. Chou, Y.-K. Chang, Rapid purification of lysozyme by mixed-mode adsorption chromatography in stirred fluidized bed, Food Chem. 272 (2019) 619-627

Z. Zhang, J. Beeckmans, Segregation in a stirred fluidized bed, Can J. Chem. Eng. 68 (1990) 932-937

A.S. Mujumdar, Handbook of industrial drying, CRC press, Boca Raton, FL, 2014

D.-H. Bae, H.-J. Ryu, D.-W. Shun, G.-T. Jin, D.-K. Lee, J.-H. Choi, Effects of agitation speed and temperature on minimum fluidization velocity of cohesive particles in a mechanically agitated fluidized bed, Korean Chem. Eng. Res. 40 (2002) 237-245

J. Kim, G.Y. Han, Effect of agitation on fluidization characteristics of fine particles in a fluidized bed, Powder Technol. 166 (2006) 113-122

A. Reyes, G. Diaz, F.-H. Marquardt, Analysis of mechanically agitated fluid-particle contact dryers, Dry. Technol. 19 (2001) 2235-2259

S. Watano, N. Yeh, K. Miyanami, Drying of granules in agitation fluidized bed, J. Chem. Eng. Jpn. 31 (1998) 908-913

J.J. Wang, Y. Han, X.P. Gu, L.F. Feng, G.H. Hu, Effect of agitation on the fluidization behavior of a gas–solid fluidized bed with a frame impeller, AIChE J. 59 (2013) 1066-1074

T. Reed III, M. Fenske, Effects of agitation on gas fluidization of solids, Ind. Eng. Chem. 47 (1955) 275-282

M. Leva, Pressure drop and power requirements in a stirred fluidized bed, AIChE J. 6 (1960) 688-692

T. Sridhar, O.E. Potter, Gas holdup and bubble diameters in pressurized gas-liquid stirred vessels, Ind. Eng. Chem. Fundam. 19 (1980) 21-26

J. Joshi, M.M. Sharma, Mass transfer and hydrodynamic characteristics of gas inducing type of agitated contactors, Can. J. Chem. Eng. 55 (1977) 683-695.