Experimental and Statistical Validation of Data on Mesh-Coupled Annular Distributor Design for Swirling Fluidized Beds

In this study, velocimetry and statistical analyses were conducted on a swirling fluidized bed. A bed of spherical particles (4 mm) was fluidized by using an annular distributor covered with mesh. The angles of rectangular blades in the distributor were set at 30°, 45°, 60°, 75° and 90°, and the cell size of the mesh cover was 2.5 × 2.5 mm2. The weight was varied from 500 to 1250 g and the effect of each variable on bed velocity response was quantified through velocimetry and statistical analysis. The statistical analysis was conducted using NCSS statistical software. The blade angle, bed weight and superficial velocity for 4 mm particles were statistically optimized at 750 g, 58.26° and 1.45 m/s, respectively. On the experimental side, these parameters have been optimized at 750 g, 60° and 1.41 m/s, respectively. A small difference of 1.74° was noticed in experimental and statistical predictions for the blade angle. The bed weights and superficial velocities were found to be same in both cases. The confidence interval (95%) for bed velocity was proposed in the range of 0.513 to 0.519 m/s. The experimentally optimized bed velocity remained within the proposed range. The well-agreeing results indicate good practical value of distributor design and high precision of the experimental measurements.

[1]  M. Y. Naz,et al.  PIV and Statistical Analysis of a Swirling Bed Process Carried out Using a Hybrid Model of Axial Blade Distributor , 2019, Processes.

[2]  M. Alkanhal,et al.  Particle image velocimetry analysis of a swirling bed operation by using a mesh-coupled annular air distributor , 2019, Journal of the Brazilian Society of Mechanical Sciences and Engineering.

[3]  J. Cruz-Reyes,et al.  Swirling fluidized bed plasma reactor for the preparation of supported nanoparticles , 2019, Revista Mexicana de Ingeniería Química.

[4]  Hong Liu,et al.  Particle image velocimetry for combustion measurements: Applications and developments , 2018, Chinese Journal of Aeronautics.

[5]  N. Mostoufi,et al.  Effect of distributor on fluidized bed hydrodynamics , 2017 .

[6]  M. Y. Naz,et al.  PIV investigations on particle velocity distribution in uniform swirling regime of fluidization , 2017 .

[7]  M. Y. Naz,et al.  Particle tracking velocimetry investigations on density dependent velocity vector profiles of a swirling fluidized bed , 2017 .

[8]  A. Oumer,et al.  Improvement on particulate mixing through inclined slotted swirling distributor in a fluidized bed: An experimental study , 2016 .

[9]  M. Y. Naz,et al.  Particle Image Velocimetry of a Swirling Fluidized Bed at Different Blade Angles , 2016 .

[10]  S. Sulaiman,et al.  PTV profiling of particles motion from the top and side of a swirling fluidized bed , 2016 .

[11]  M. Y. Naz,et al.  Hydrodynamics of multi-sized particles in stable regime of a swirling bed , 2015, Korean Journal of Chemical Engineering.

[12]  F. Farhadi,et al.  Hydrodynamic characteristics of gas–solid tapered fluidized beds: Experimental studies and empirical models , 2015 .

[13]  Samson M. Aworinde,et al.  Investigation of a swirling flow nozzle for a fluidised bed gas distributor , 2015 .

[14]  Vahid Akbari,et al.  Model-based analysis of the impact of the distributor on the hydrodynamic performance of industrial polydisperse gas phase fluidized bed polymerization reactors , 2014 .

[15]  Honghao He,et al.  Statistical and frequency analysis of the pressure fluctuation in a fluidized bed of non-spherical particles , 2014 .

[16]  Mohd Nawi,et al.  Aerodynamics of a swirling fluidized bed , 2013 .

[17]  Shaharin A. Sulaima,et al.  Variation of Bed Pressure Drop with Particle Shapes in a Swirling Fluidized Bed , 2012 .

[18]  V. Raghavan,et al.  Experimental studies on a swirling fluidized bed with annular distributor , 2011 .

[19]  D. Murthy,et al.  Minimum superficial fluid velocity in a gas-solid swirled fluidized bed , 2010 .

[20]  Vijay R. Raghavan,et al.  Studies on biomass drying apparatus using swirling fluidization technique , 2009 .

[21]  P S Dr.Sreejith,et al.  Influence of angle of air injection and particles in bed hydrodynamics of swirling fluidized bed , 2008 .

[22]  E. González-Pradas,et al.  Lignin and Ethylcellulose as Polymers in Controlled Release Formulations of Urea , 2008 .

[23]  Lynn F. Gladden,et al.  The nature of the flow just above the perforated plate distributor of a gas-fluidised bed, as imaged using magnetic resonance , 2006 .

[24]  V. Raghavan,et al.  Hydrodynamics of a swirling fluidised bed , 2002 .

[25]  V. I. Lakshmanan,et al.  Hydrodynamic study of a toroidal fluidized bed reactor , 2000 .

[26]  O. Levenspiel,et al.  Spiral distributor for fluidized beds , 1986 .

[27]  Liang-Shih Fan,et al.  Characteristics of fluidization at high pressure , 1984 .

[28]  C. Wen,et al.  A generalized method for predicting the minimum fluidization velocity , 1966 .

[29]  J. M. Smith,et al.  Diffusion and Reaction in Porous Catalysts , 1964 .

[30]  S. Ergun,et al.  Fluid Flow through Randomly Packed Columns and Fluidized Beds , 1949 .