Testing of New design of Mesh-coupled Axial Blade Distributor for Swirling Fluidization Operation

Yıl 2019, Cilt: 2 Sayı: 4, 111 - 118, 30.12.2019

Muhammad Yasin Naz Shazia Shukrullah Shaharin Anwar Sulaiman Afsin Gungor

Öz

All the fluidized beds have air distributor as their
major component, which can have several variances. The distributor design worth
proper investigations as it affects the quality of the fluidization. In this
study, Particle Image Velocimetry (PIV) of a SFB, operated with a mesh-coupled
air distributor, was carried out from top and side of the bed. The velocity
vector fields of the particles and then the average velocities at different
locations of the bed were generated by considering particle size and density as
operational parameters. The experimental finds showed that there exist several
partially differentiable layers during a swirling operation of the longer beds.  The segregated bed includes a thin layer of particles
swirling at the bottom of the bed and a thick layer in the middle of the bed
followed by a slight bubbling at the top. It was also observed that the overall
velocity of the particles increased with an increase in superficial air velocity.
The uniform swirling of 3, 4 and 6 mm particles happened at superficial air
velocities of 1.6, 1.8 and 2.2 ms^-1, respectively.

Anahtar Kelimeler

Swirling fluidized bed, mesh-type distributor, particle image velocimetry, hydrodynamics of particles

Kaynakça

• [1] S. A. Sulaiman, C. S. Miin, M. Y. Naz, and V. R. Raghavan, "Particle Image Velocimetry of a Swirling Fluidized Bed at Different Blade Angles," Chemical Engineering & Technology, vol. 39, pp. 1151-1160, 2016.
• [2] F. J. Collado, "New one-dimensional hydrodynamics of circulating fluidized bed risers," Granular Matter, vol. 18, p. 78, 2016// 2016.
• [3] D. Geldart and J. Baeyens, "The Design of Distributors for Gas-fluidized Beds," Powder Technology, vol. 42, pp. 67- 78, 1985.
• [4] W. Jittanit, G. Srzednicki, and R. H. Driscoll, "Comparison Between Fluidized Bed and Spouted Bed Drying for Seeds," Drying Technology, vol. 31, pp. 52-56, 2013/01/02 2013.
• [5] W. C. Yang, "Bubbling Fluidized Beds”, in Handbook of Fluidization and Fluid-Particle Systems," Ed. Yang, W.-C., Marcel Dekker, N.Y., pp. 53-111, 2003.
• [6] D. F. Othomer, "Background,History and Future of Fluid bed systems, Fluidization,," Reinhold publishing corporation, New York, pp. 102-115, 1956.
• [7] S. Shukrullah, N. M. Mohamed, M. S. Shaharun, M. S. M. Saheed, and M. I. Irshad, "Effect of CVD Process Temperature on Activation Energy and Structural Growth of MWCNTs," Metallurgical and Materials Transactions A, vol. 47, pp. 1413-1424, 2016.
• [8] C. S. Miin, S. A. Sulaiman, V. R. Raghavan, M. R. Heikal, and M. Y. Naz, "Hydrodynamics of multi-sized particles in stable regime of a swirling bed," Korean Journal of Chemical Engineering, vol. 32, pp. 2361-2367, 2015/11/01 2015.
• [9] V. K. Venkiteswaran, G. J. Jun, C. Y. Sing, S. A. Sulaiman, and V. R. Raghavan, "Variation of Bed Pressure Drop with Particle Shapes in a Swirling Fluidized Bed," Journal of Applied Sciences, vol. 12 pp. 2598-2603, 2012.
• [10] N. Sanvitale and E. T. Bowman, "Using PIV to measure granular temperature in saturated unsteady polydisperse granular flows," Granular Matter, vol. 18, p. 57, 2016// 2016.
• [11] T. Hagemeier, C. Roloff, A. Bück, and E. Tsotsas, "Estimation of particle dynamics in 2-D fluidized beds using particle tracking velocimetry," Particuology.
• [12] E. D. Karen and S. t. Matthias, "Focus on granular segregation," New Journal of Physics, vol. 15, p. 035017, 2013.