Hydrodynamics and energy consumption studies in a three-phase liquid circulating three-phase fluid bed contactor

Journal Article · Wed Jul 15 00:00:00 EDT 2009 · Experimental Thermal and Fluid Science

DOI:https://doi.org/10.1016/J.EXPTHERMFLUSCI.2009.02.002· OSTI ID:21195810

Rusumdar, Ahmad J ^[1]; Abuthalib, A ^[2]; Mohan, Vaka Murali; Srinivasa Kumar, C ^[3]; Sujatha, V; Rajendra Prasad, P ^[4]

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1. Thirumalai Engineering College, Kancheepuram, Tamil Nadu (India)
2. Dept. of Modelling, Leibniz Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig (Germany)
3. Dept. of CSE, New Netaji Institute of Technology, Toopranpet, Nalgonda 508 252, AP (India)
4. Dept. of Chemical Engineering, Andhra University, College of Engineering, Visakhapatnam 530 003, AP (India)

The hydrodynamics and energy consumption have been studied in a cold flow, bubbling and turbulent, pressurized gas-liquid-solid three-phase fluidized bed (0.15 m ID x 1 m height) with concurrent gas-liquid up flow is proposed with the intention of increasing the gas hold up. The hydrodynamic behaviour is described and characterised by some specific gas and liquid velocities. Particles are easily fluidized and can be uniformly distributed over the whole height of the column. The effect of parameters like liquid flow rate, gas flow rate, particle loading, particle size, and solid density on gas hold up and effect of gas flow rate, solid density and particle size on solid hold up, energy consumption and minimum fluidization velocity has been studied. At the elevated pressures a superior method for better prediction of minimum fluidization velocity and terminal settling velocities has been adopted. The results have been interpreted with Bernoulli's theorem and Richardson-Zaki equation. Based on the assumption of the gas and liquid as a pretend fluid, a simplification has been made to predict the particle terminal settling velocities. The Richardson-Zaki parameter n' was compared with Renzo's results. A correlation has been proposed with the experimental results for the three-phase fluidization. (author)

• OSTI ID: 21195810
• Journal Information: Experimental Thermal and Fluid Science, Vol. 33, Issue 5; Other Information: Elsevier Ltd. All rights reserved; ISSN 0894-1777
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
LIQUIDS
HYDRODYNAMICS
VELOCITY
ENERGY CONSUMPTION
FLUIDIZATION
GAS FLOW
PARTICLE SIZE
SOLIDS
DENSITY
FLUIDIZED BEDS
TURBULENCE
LIQUID FLOW
MULTIPHASE FLOW
CORRELATIONS
PARTICLES
BUBBLES
Gas-liquid-solid fluidization
Minimum fluidization velocity
Pseudo-fluid
Phase hold up