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Lateral mixing of solids in a high-density riser is investigated by a phosphor tracer method. The lateral solids dispersion is determined by measuring the solids RTD at different radii using point sources for tracer injection. A two-dimensional dispersion model describes the measured RTD curves satisfactorily. The cross-sectional average solids fraction has the dominant effect on the lateral solids...
In this paper, silica white, which is obtained from rice husk in a fluidized bed, is investigated. First, the experiments are carried out in the cold fluidized bed of 90-mm interior diameter (I.D.). The experimental results show that the ash mixed with a little rice husk can be fluidized when U g is within the range of 0.18-0.316 m/s. Then, the experiments of combustion of rice husk are investigated...
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