隔网对正渗透膜压力延迟渗透性能影响的研究

发布时间：2018-07-03 12:48

本文选题：正渗透膜 + 浓差极化　；参考：《水处理技术》2017年03期

【摘要】：针对压力延迟渗透(PRO)过程中正渗透膜片的性能表现,采用无隔网、单隔网和双隔网相互对照的方法考察了过程中正渗透膜片的水通量和盐通量的变化情况。结果发现,实验过程中无隔网时浓差极化现象对水通量的影响比较明显;单隔网能有效减弱浓差极化现象,水通量平均提升10%左右,盐通量下降幅度为3.4%左右;双隔网虽然在一定程度上可以减弱浓差极化现象,但实验过程中出现的阴影效应,导致膜片有效渗透面积减少及水通量快速下降。经过比较发现PRO过程中在膜片两侧添加单隔网可以使膜的水渗透性能和盐截留性能达到较好的状态。
[Abstract]:In view of the performance of the positive permeable diaphragm in the process of pressure delayed penetration (PRO), the change of water flux and salt flux in the positive permeable diaphragm during the process was investigated by the method of non septum, single screen and double isolation. The network can effectively reduce the concentration polarization, the water flux increases by about 10% and the salt flux decreases by about 3.4%. Although the double isolation network can weaken the concentration polarization in some degree, the shadow effect in the experimental process leads to the decrease of the effective permeable area and the rapid decrease of the water flux. The PRO process has been found in the process of comparison. Adding single spacer on both sides of the diaphragm can make the membrane's water permeability and salt rejection better.
【作者单位】：中国海洋大学工程学院山东省海洋工程重点实验室;中国海洋大学海洋化学理论与工程技术教育部重点实验室;
【基金】：海洋可再生能源专项资金项目(GHME2013JS07)
【分类号】：TQ051.893

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