| Summary: | 碩士 === 中原大學 === 化學工程研究所 === 99 === In this study, a systematic investigation on the pressure drop was performed in a countercurrent-flow rotating packed bed packed. The pressure drop was measured as a function of gas flow rate, liquid flow rate, rotational speed, liquid viscosity, the inner and outer radii of the bed and the types of the liquid distributor. Results showed that the pressure drop increased with increasing gas flow rate and rotational speed, and was not significantly affected by liquid flow rate. The pressure drop in a dry bed was higher than that in an irrigated bed. The pressure drop decreased with increasing the radial depth of the bed. Compared with single-tube liquid distributor, using double-tube liquid distributor can reduce the pressure drop effectively. Considering all operation parameters that mentioned before, a new correlation of pressure drop was proposed.
Besides, the flooding phenomenon in rotating packed bed was also investigated in this study. Results showed that Sherwood correlation overestimated the operation range of rotating packed bed. The mass transfer near the flooding point was also investigated using water – isopropyl alcohol absorption system. When the system approaching flooding point, the system became unstable and a few liquid was carried out from gas outlet, and was not favorable for mass transfer.
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