湍流入料对中空纤维膜组件分离性能影响试验研究

研究了湍流入料对线型中空纤维膜和编织型中空纤维膜的强化分离作用,比较了湍流入料与直流入料对线型中空纤维膜性能影响的差别,进行了迪恩涡强化编织型中空纤维膜与湍流入料强化线型中空纤维膜渗透性能的研究.试验结果显示,湍流入料能显著提高线型中空纤维膜渗透性能,减少浓差极化和膜污染,回收率增大2倍,能耗低20%以上;湍流入料可增大编织型中空纤维膜渗透流量10%左右,能耗降低5%左右,膜组件长度越短,效果越明显迪恩涡强化编织型中空纤维膜分离性能优于湍流入料强化线型中空纤维膜分离性能,能耗低20%以上,渗透回收率高1～1.5倍.图6,参8.

Experimental study of separation performance of hollow fiber membrane influenced by turbulent feed

The intensifying separation performance of line and woven hollow fiber membrane(LHFM & WHFM) results from turbulent feed was experimentally studied in this paper,and the performance difference of LHFM between turbulent and laminar flow feed was also compared, and the permeating performance was studied between Dean Vortex intensifying WHFM and turbulent feed intensifying LHFM.The results indicate that turbulent feed can increase greatly permeating performance, reduce concentration polarization and membrane fouling, increase reclamation ration about two times, decrease energy consumption over 20% for LHFM;It also can increase WHFM flux about 10%, and reduce energy consumption about 5%.The shorter the length of membrane modules is,the more evident the effect is. The separation performance of Dean Vortex intensifying WHFM is better than that of turbulent feed intensifying LHFM, energy consumption of the former is lower 20% than that of the latter, and reclamation ration of the former is higher 1 to 1.5 times than that of the latter.6figs.,8refs.