空纤维模块位置的效果(水平、垂直) 在为由使用 polyethersulfone (足) 的 PVA 答案的分离性能上凹陷有分子的重量的纤维 ultrafiltration (UF ) 膜截止(MWCO ) 30 000 被讨论了。说明的试验性的结果合适的操作为 PVA 调节答案,这如下:trans 膜压力 2.1 酒吧,答案温度 75 掳 C 并且喂速度 0.32 m/s。在这些合适的操作条件下面,permeate 流动为垂直模块为水平模块并且从 39.8 L/( m2 路 h 路 酒吧)从 36.8 L/( m2 路h 路 酒吧)到 42.9 L/( m2 路 h 路 酒吧)到 66.6 L/( m2 路 h 路 酒吧)。而且,足空纤维 UF 膜的分离表演由比由使用水平空纤维模块使用垂直空纤维模块更好。当trans膜压力从 1 工具条增加了到 2.1 酒吧时,从 50 掳C 的解决方案温度到 75 掳C ,从 0.16 m/s 喂解决方案速度到 0.32 m/s , PVA 拒绝将从95.8%~99.7%增加,95.4%~98.6%,95.8%~99.2%为水平模块分别地,并且从98.8%~99.8%,98.6%~99.4%,98.5%~99.4%为垂直模块分别地。因此,在足空纤维 UF 过程的 PVA 拒绝为垂直模块是超过 98.5% ,并且它对从废水的 PVA 恢复合适。关键词凹陷纤维 UF 膜 - polyethersulfone - 聚乙烯化合物的酒精 - 水平模块 - 垂直模块。中国的国家基本研究节目支持的工程(鈥 ? 73 鈥 ? 计划,资助号码 2003CB615705 ) ,并且中国(资助号码 20076009 ) 的国家自然科学基础
The effect of hollow fiber module positions ( horizontal and vertical) on separation performance for PVA solution by using polyethersulfone (PES) hollow fiber ultrafiltration (UF) membrane with the molecular weight cut-off (MWCO) 30 000 has been discussed. Experimental results illustrated that the suitable operation conditions for PVA solution were as follows: trans-membrane pressure 2.1 bar, solution temperature 75℃ and feed velocity 0.32 m/s. Under these suitable operation conditions, the permeate flux is from 36.8 L/(m^2 ·h·bar) to 42.9 L/(m^2 ·h·bar) for the horizontal module and from 39.8 L/(m^2 ·h·bar) to 66.6 L/(m^2 ·h·bar) for the vertical module. Besides, the Separation performance of PES hollow fiber UF membrane was better by using vertical hollow fiber module than by using horizontal hollow fiber module. When the trans-membrane pressure increased from 1 bar to 2.1 bar, solution temperature from 50 ℃ to 75 ℃, feed solution velocity from 0.16 m/s to 0.32 m/s, the PVA rejection would increase from 95.8% to 99.7%, 95.4 96 to 98.6 %, 95.8 96 to 99.2 96 for horizontal module respectively, and from 98.8 96 to 99.8 %, 98.6 96 to 99.4 96, 98.5 96 to 99.4 96 for vertical module respectively. Therefore, PVA rejection in PES hollow fiber UF process was more than 98.5 96 for vertical module, and it is suitable for PVA recovery from wastewater.