The different diameters particle concentration distribution in
a scroll cyclone separator simulation results show an unsteady
spiral dust strand near the cyclone wall and a dust ring near the
cyclone top plate for the larger particles are observed. The shortcut
flow is detected below the vortex finder 0.25 D where the
particle concentration is high, especially for the smaller particles.
The axial profiles of the particle concentration showed that there
exists serious particles entrainment within the height 0.5 D
above the dust discharge. The smaller the particles, the more
serious particles entrainment from the dust hopper is. From dust
discharge to separated space top, the particle concentration
decreases gradually due to the secondary separation effect of
inner swirl. The gas flow field has significantly changed as a
result of the presence of the solid particles. The higher the solids
loading, the more the swirl is reduced. The concepts of backmixing
rate, first escape rate, second escape rate are put forward.
The results can provide fundamentals for further study of gas–
solid separation models and performance calculation in gas
cyclones
The different diameters particle concentration distribution ina scroll cyclone separator simulation results show an unsteadyspiral dust strand near the cyclone wall and a dust ring near thecyclone top plate for the larger particles are observed. The shortcutflow is detected below the vortex finder 0.25 D where theparticle concentration is high, especially for the smaller particles.The axial profiles of the particle concentration showed that thereexists serious particles entrainment within the height 0.5 Dabove the dust discharge. The smaller the particles, the moreserious particles entrainment from the dust hopper is. From dustdischarge to separated space top, the particle concentrationdecreases gradually due to the secondary separation effect ofinner swirl. The gas flow field has significantly changed as aresult of the presence of the solid particles. The higher the solidsloading, the more the swirl is reduced. The concepts of backmixingrate, first escape rate, second escape rate are put forward.The results can provide fundamentals for further study of gas–solid separation models and performance calculation in gascyclones
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