Rafail Isemin, Sergey Kuzmin, Oleg Milovanov, Dmitry Klimov, Aleksandr Mikhalev, Natalia Muratova
monodisperse fluidized bed, magnetolabeled particle, magnetometer, particle displacement, particle velocity, probability, external heat transfer
According to results of tracking a magnetolabeled particle in the monodisperse fluidized bed of silica-alumina catalyst, in which a gas-tight cylinder simulating a heat transfer surface was submerged vertically and in axial alignment with the apparatus, there has been confirmed the formation of a special zone near the body with the width up to 20 mm and local vertical circulation of particles. The zone is formed with a rise in gas velocity and a gradual deterioration of particle exchange with the core of the bed so that the time of the particle residence in the zone is increased up to 0.36-0.5 s, whereas in the core of the bed it is 0.25-0.4 s. The lower the initial height of the bed is, the lower the gas velocity at which a near-surface zone is formed. Formation of the near-surface zone can have a direct impact on the heat transfer rate and this fact should be taken into account when constructing models of external heat transfer in a fluidized bed.
Cite this paper
Rafail Isemin, Sergey Kuzmin, Oleg Milovanov, Dmitry Klimov, Aleksandr Mikhalev, Natalia Muratova. (2016) Concerning the Impact of a Submerged Body on Particle Movement in a Fluidized Bed in Terms of Body-Bed Heat Transfer. International Journal of Chemistry and Chemical Engineering Systems, 1, 76-80