可旋转的太阳能集热—减压膜蒸馏式脱盐研究

设计构建了1套新型可旋转的太阳能集热—减压膜蒸馏脱盐系统装置,以太阳能集热提供热源,以3.5%的氯化钠溶液模拟海水进行脱盐实验。研究了不同进料液温度、冷侧真空度、进料液流量对膜组件性能的影响,以及1个工作日内膜通量、淡水电导率和截留率的影响变化。结果表明:当系统运行稳定时,膜组件入口进料液温度、冷侧真空度和进料液流量是影响系统性能的主要因素,且在1个工作日内系统所产淡水的电导率可达到10μS/cm以下,截留率可达到99.9%以上。

Research on the rotatabIe soIar coIIector-vacuum membrane distiIIation desaIination

A new type of solar collector-vacuum membrane distillation desalination system has been designed and builted. The solar collector is used for providing heat sources for the system. Desalination experiments are conducted by using 3.5% of sodium chloride solution as simulated seawater. The effects of different temperatures of feed-in liquid,the vacuum degree on cold side,and the flow rate of feed-in liquid on the performances of the membrane module,as well as the changes of influences resulted from membrane flux,freshwater conductivity and retention rate per workday are studied. The results show that when the system runs stably ,the main factors affecting the system performances are the inlet feed-in liquid temperature of the membrane module,vacuum degree on the cold side,and flow rate of the feed-in liquid. Moreover,the conductivity of fresh water produced by the system can reach 10μS/cm or less,and the retention rate can be above 99.9%in a workday.