卷式正渗透膜组压力延迟渗透性能实验研究

发布时间：2018-05-23 13:09

本文选题：正渗透膜组 + 压力延迟渗透　；参考：《现代化工》2017年02期

【摘要】：利用卷式醋酸纤维素正渗透膜组,以Na Cl溶液和自来水分别作驱动液和料液,考察了进口压力、溶液流量、驱动液浓度和跨膜压差等因素对膜组性能的影响,并对以上4个因素进行单因素实验。结果表明,相同流速下料液流道阻力明显大于驱动液流道;随着料液和驱动液流量的增加,膜组水通量呈缓慢上升趋势,料液流量改变对水通量的影响更明显一些,但和膜片相比,膜组的单位面积水通量有所下降;通过增加驱动液浓度能够较大幅度提升膜组水通量和功率密度,但浓差极化现象的抑制作用也逐渐增加。随着跨膜压差的升高,水通量呈逐渐下降趋势,当其达到渗透压的一半时,膜组功率密度达到最大。
[Abstract]:The effects of inlet pressure, solution flow rate, driving liquid concentration and transmembrane pressure difference on the performance of the membrane group were investigated using NaCl solution and tap water as the driving fluid and the feed liquid, respectively, using the winding cellulose acetate positive osmotic membrane group. Single factor experiments were carried out on the above four factors. The results showed that at the same flow rate, the resistance of the feed fluid passage was obviously greater than that of the driving fluid channel, and with the increase of the feed and driving fluid flow rate, the water flux of the membrane increased slowly, and the change of the feed flow rate had a more obvious effect on the water flux. However, compared with the membrane, the water flux per unit area of the membrane decreased, and the water flux and power density of the membrane increased greatly by increasing the concentration of the driving liquid, but the inhibition of the concentration polarization phenomenon increased gradually. With the increase of the transmembrane pressure difference, the water flux decreases gradually. When the membrane pressure reaches half of the osmotic pressure, the power density of the membrane group reaches the maximum.
【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;
【基金】：海洋可再生能源专项资金项目(GHME2013JS07)
【分类号】：TQ028.8

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