摘要
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。
The seawater desalination study was conducted by DCMD with self-prepared PVDF flat sheet hydrophobic membranes.The influence of scale inhibitor on water recovery was investigated with the seawater at 50℃and the cold distillate water at 20℃.The variation of permeate flux and conductivity with operating time during continuous 200 h DCMD experiment was studied in detail,the optimal concentration ratio for seawater desalination by DCMD was also determined.It was found that the addition of scale inhibitor in the seawater can obviously improve the water recovery,it can reach as high as about 85%and reduce the emission of seawater concentrate,the PVDF membrane had stable permeate flux and the conductivity of the obtained distillate remained below 10μS/cm during the whole process.The continuous DCMD experiment results indicated that this emerging technology may be of great potential to be utilized in seawater desalination.
作者
张琳
侯得印
樊华
王军
尹子飞
Zhang Lin;Hou Deyin;Fan Hua;Wang Jun;Yin Zifei(school of environment and chemical engineering,nanchang university,nanchang 330031,china;state key laboratory ofenvironmental aquatic chemistry,research centerfor eco-environmental sciences,chinese academy ofsciences,beijing 100085.china;school of chemical and environmental engineering,china university of mining&technology,beijing 100083,china)
出处
《水处理技术》
CAS
CSCD
北大核心
2012年第7期63-67,74,共6页
Technology of Water Treatment
基金
国家自然科学基金资助项目(51138008
51108445)
清华大学固体废物处理与环境安全教育部重点实验室开放基金(SWMES-2010-03)
环境水质学国家重点实验室人才启动课题(10Y08ESPCR)
关键词
聚偏氟乙烯
平板疏水膜
膜蒸馏
海水淡化
阻垢剂
polyvinylidene fluoride
flat-sheet hydrophobic membrane
membrane distillation
seawater desalination
scale inhibitor
