两种超滤膜污染化学清洗方法比较

Comparision of two chemical cleaning processes on ultrafiltration membrane

某电厂在高参数长周期运行后超滤系统膜组件存在严重的生物污损和铁污染,确定采用碱洗法和酸洗法两种方案清洗滤膜。经两种方案超滤膜化学清洗方案比较发现,酸洗法效果显著,碱洗法效果不明显。经酸洗后,单套超滤膜系统压差降至15～20kPa,产水流量达到100～122t/h。

The problem of serious biofouling and iron contamination on uhrafiltration membrane in make up water treatment system which run under conditions with high-parameter ＆ long-term of one power plant was observied. Two chemical cleaning processes were determined to solve this problem. The results show that the effect of acid washing is much better than alkali washing. After acid wash- ing, the system differential pressures of single membrane element has reduced to 15 ~ 20kPa, while the flux rate reached to 100 - 122T/H.