The fluidization behavior of the three kinds of nano-particles (TiO2, SiO2, Al2O3) was analyzed in a rotating fluidized bed (RFB). Bed pressure
drop, minimum fluidization velocity, bed expansion, entrainment and particle mixing characteristics under various centrifugal accelerations were
experimentally investigated. The effects of centrifugal acceleration on agglomerate size and density were analyzed based on a Richardson–Zaki
approach coupled with a fractal model.
The bed pressure drop behavior showed almost similar to that of A or B-particles of Geldart's classification. Dimensionless particle bed height
became smaller when the centrifugal acceleration was larger. Size of agglomerate decreased and its density increased with an increase in
centrifugal acceleration. The agglomerate size in the RFB showed smaller than that in other types of fluidized bed system such as vibration and
magnetic field as well as in a conventional fluidized bed, and the agglomerate density became larger. Particle entrainment became smaller in the
case of the higher centrifugal acceleration. These results confirmed that the RFB can reduce the size of a nano-particle agglomerate and fluidize
nano-particles at high gas velocity without any significant entrainment. The RFB is thus
The fluidization behavior of the three kinds of nano-particles (TiO2, SiO2, Al2O3) was analyzed in a rotating fluidized bed (RFB). Bed pressure
drop, minimum fluidization velocity, bed expansion, entrainment and particle mixing characteristics under various centrifugal accelerations were
experimentally investigated. The effects of centrifugal acceleration on agglomerate size and density were analyzed based on a Richardson–Zaki
approach coupled with a fractal model.
The bed pressure drop behavior showed almost similar to that of A or B-particles of Geldart's classification. Dimensionless particle bed height
became smaller when the centrifugal acceleration was larger. Size of agglomerate decreased and its density increased with an increase in
centrifugal acceleration. The agglomerate size in the RFB showed smaller than that in other types of fluidized bed system such as vibration and
magnetic field as well as in a conventional fluidized bed, and the agglomerate density became larger. Particle entrainment became smaller in the
case of the higher centrifugal acceleration. These results confirmed that the RFB can reduce the size of a nano-particle agglomerate and fluidize
nano-particles at high gas velocity without any significant entrainment. The RFB is thus
การแปล กรุณารอสักครู่..