| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 172924 | Computers & Chemical Engineering | 2012 | 9 Pages |
Gas and particles hydrodynamic behaviors were investigated in a pilot-scale cold-mode riser and a bubbling fluidized bed gasifier by means of experiment and computational fluid dynamics (CFD).Six different experimental sets were conducted in the cold-rig dual fluidized bed (DFB) at different gas velocities in both the riser and the recycle chamber aeration. A two-dimensional (2D) multi-fluid Eulerian model incorporating the kinetic theory of granular flows was applied to identify unsteady-state behaviors of the fluidized bed.The CFD model predicts well the solid circulation rate in the cold-rig DFB for all the six experimental runs. A discrepancy between experiment and simulation is observed in the axial solid holdup along the riser. The simulation results demonstrate that the cold-bed simulation can be used to predict the solid circulation rate for the hot-bed operation of the DFB gasifier.
► Hydrodynamics of cold-rig dual CFB were investigated by means of experiment and CFD. ► Solid circulation rate was predicted by CFD and compared to the experimental one. ► CFD simulation results show reasonable agreement with experimental data. ► Cold-bed hydrodynamics are comparable to hydrodynamics in hot-bed mode.
