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Dynamical features of the solid motion in gas–solid risers |
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| Authors: | Satish Bhusarapu Miryan Cassanello Muthanna H Al-Dahhan Milorad P Dudukovic Steven Trujillo Timothy J O’Hern |
| Institution: | 1. Chemical Reaction Engineering Laboratory, Department of Chemical Engineering, Campus Box 1198, 1 Brookings Drive, Washington University, St. Louis, MO 63130-4899, USA;2. PINMATE, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Int. Güiraldes 2620, Buenos Aires C1428BGA, Argentina;3. Sandia National Laboratories, Engineering Sciences Center, MS 0834, P.O. Box 5800, Albuquerque, NM 87185, USA |
| Abstract: | The trajectories of a solid tracer with the same characteristics as the circulating solids in the risers of two pilot-scale circulating fluidized beds (CFBs), obtained by the computer automated radioactive particle tracking (CARPT) technique, are examined in detail to get further insights into the complex solids dynamics of these systems. The analysis uses tools from the theory of non-linear dynamics and symbolic dynamics. Distinct features of the solids dynamics within the fast fluidization and the dilute phase transport flow regimes are highlighted and related to the operating conditions. The possibility of downflow cluster existence within the central region of the riser is particularly examined. |
| Keywords: | Gas&ndash solid risers Circulating fluidized beds Solids dynamics CARPT |
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