Based on a three dimensional visual fast fluidized bed (D=0.1 m, H=3 m), an image processing method was developed to identify and characterize the particle clusters formed by quartz sand particles of mean diameter ds=0.25 mm, density ρp=2650 kg/m3, packing density ρpa=1590 kg/m3. Experiment was carried out under the operating condition of superficial gas velocity Ug=4.35 m/s and solid flux Gs=40-70 kg/(m2s). Results indicate that this method is able to identify different types of particle clusters. The size of particle clusters increases with higher calculating location and smaller solid flux, while the number of particle clusters decreases. The falling velocity of particle clusters fluctuates around a certain value about 1m/s.
|Translated title of the contribution||Identification and characterization of particle clusters in a fast fluidized bed|
|Number of pages||6|
|Journal||Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics|
|Publication status||Published - 1 Apr 2018|
- Fast fluidized bed
- Gas-solid flow
- Particle clusters