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采用直接接触式膜蒸馏技术进行海水淡化试验研究。在海水温度为55℃,循环水温度为20℃的条件下,考察了不同阻垢剂用量对膜蒸馏海水淡化的影响、工艺连续运行过程中膜通量和产水电导率随时间的变化情况,确定了膜蒸馏过程稳定运行的最优浓缩倍率。结果表明,阻垢剂的加入可明显提高淡水的产水率,产水率可达到85%以上,减少了高盐度海水浓缩液的排放,膜通量稳定,产水水质好,其电导率不超过10μS/cm,膜蒸馏海水淡化具有一定的技术可行性和可操作性。
Direct contact membrane distillation technology for desalination test research. Under the conditions of seawater temperature of 55 ℃ and circulating water temperature of 20 ℃, the effects of different scale inhibitors on desalination of membrane distillation and the change of membrane flux and conductivity of water during the process of continuous operation were investigated , To determine the stable operation of the membrane distillation process optimal enrichment ratio. The results showed that the addition of scale inhibitor can significantly increase the fresh water production rate, the water production rate can reach more than 85%, reducing the discharge of high salinity seawater concentrate, membrane flux stability, good water quality, and its conductivity No more than 10μS / cm, membrane distillation desalination has some technical feasibility and operability.