摘要：
实验对比分析了有无磁化预处理条件下纳滤膜的无机垢污染情况。研究结果发现,磁化预处理能够有效减缓膜比通量的衰减,低压冲洗后膜比通量恢复率可高达90%,而无磁化预处理的纳滤膜通量恢复率仅为68%。SEM分析发现,加上磁化预处理后,纳滤膜表面生成的CaCO3垢不再是致密的方解石,而是质地松软、易脱落的文石结构,这更有利于维持纳滤膜的稳定运行。
关键词:
高梯度磁场,
无机钙垢,
膜污染,
纳滤
Abstract:
The situation of inorganic scale pollution of nano-filtration(NF) membrane by or not by magnetizing pretreatment has been contrasted and analyzed. It is found that magnetizing pretreatment can effectively retard the decline of membrane specific flux. After rinsed under low pressure, the membrane specific flux recovering rate can be as high as 90%. But the flux recovering rate of nano-filtration membrane that has not been pretreated by magnetization process is only 68%. According to SEM analysis, after being pretreated by magnetization process, the CaCO3 scale formed on the surface of nano-filtration membrane is soft and caduceus aragonite, instead of dense calcite. The fact is more advantageous for the nano-filtration membrane to keep stable operation.
Key words:
high gradient magnetic field,
inorganic calcium scale,
membrane pollution,
nano-filtration membrane
中图分类号:
陈秋, 冯玉芳, 董冰洁. 高梯度磁化控制纳滤膜无机垢污染的研究[J]. 工业水处理, 2015, 35(3): 34-36.
Chen Qiu, Feng Yufang, Dong Bingjie. Research on inorganic scale pollution control of nano-filtration membrane using high gradient magnetizing pretreatment[J]. INDUSTRIAL WATER TREATMENT, 2015, 35(3): 34-36.