迪恩涡强化传质的理论与优化设计试验研究

研究了编织型中空纤维膜迪恩涡强化传质理论、优化设计理论、各种几何参数对渗透性能的影响,试验研究了线型/编织型中空纤维膜渗透性能对比和不同螺距编织型中空纤维膜渗透性能对比。结果表明采用弯曲管道流体窄隙理论优化设计编织型中空纤维膜组件,试验结果与理论分析计算一致;迪恩涡强化传质编织型中空纤维膜渗透性能,不但对污染溶液作用显著,同时对降低不含溶质的纯水渗透能耗也有明显作用。

Experimental research on theory and design of Dean vortices for strengthening mass transfer

The theory of Dean vortices, which enhanced mass transfer of woven hollow fiber membrane (WHFM), optimal design and influence of geometric parameters on the permeation capability of the membrane are discussed. Furthermore the permeation features of LHFM (linear hollow fiber membrane) and WHFM, and those of WHFMs with different spiral distances are compared experimentally. Results indicate that experimental result is consistent with theoretic analysis when the WHFM models are designed optimally using narrow gap theory for curved conduit fluid. Dean vortices enhance the mass transfer and permeation capability of WHFM, not only for polluted solution, but also reduce energy consumption for pure water without any solute.