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Weichuan Tan,Shanlin Du,Yunfei He,Guoqiang Lv,Wenhui Ma,Aimin Xing,Jie Huang 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.8
The structure of the gas distributor was optimized to enhance the reaction rate of direct synthesis of siliconemonomers in a fluidized bed. In this work, the opening rate range was selected by the critical pressure drop ratio, andthe influences of opening ratio and the holes quantities of distribution plate on the synthesis process were systematicallystudied by numerical simulation approaches. The fluidization velocity was simplified by Reylows’ and Archimedes’ criterionnumbers. To better predict the gas-solid fluidization characteristics in the bed, the drag model was modified by thecritical fluidization velocity. In addition, the distributor performance was investigated from the perspectives of solidphase volume fraction, pressure drop change, bubble behavior and power spectrum analysis, etc. The results show thatthe distribution plate pressure drop ratio is about 0.11679 at the opening rate of 0.53%, which meets the design criterionof reducing the dissipation while increasing the fluidized quality. A high frequency and a low amplitude arise at theopening rate of 0.53%, indicating the corresponding favorable efficiency of heat and mass transfer. The maximum fluctuationrange of the solid phase distribution with =0.53% is only 1.7%, indicating that the inhomogeneity of the solidphase fraction distribution is the lowest, and the fluidization stability is improved by about 30%. Consequently, =0.53%is proposed as the best distributor configuration and enhanced the monomer synthesis efficiency.