![]() The gas-solid dispersion improved by 18% with baffles at 8.3 m/s and 17% with ultrasound at 5.6 m/s. With a velocity of 5.6 m/s, the solids distribution in the cross section improves with the rings and worsens with the influence of ultrasound, but with 8.3 m/s rings and ultrasound improve the solids distribution. The ring baffles increase the solid velocity near the wall and the ultrasound decreases it. We used five airfoil-shaped ring baffles with 10 mm of thickness and 20 transducers with a frequency of 40 kHz and an input power of 10, respectively, above the riser inlet. In this work, the influence of these devices on the solids dispersion in a lab-scale CFB riser was evaluated using Phase Doppler Anemometry (PDA) measurements. Two alternatives to improve solids dispersion are the use of aerodynamic ring-type baffles and ultrasonic waves. ![]() ![]() In these devices, the core-annulus profile and the clusters of particles decrease the gas-solid contact. Circulating fluidized beds (CFB) are used in several industrial applications, in which more homogeneous fluidization of solid particles is desired. ![]()
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