微波辅助疏水膜的清洗

Microwave assisted cleaning of hydrophobic membrane

针对膜蒸馏过程中膜表面常见的CaSO4垢和腐殖酸混合垢,对微波强化疏水膜清洗的效果进行了研究。结果表明,对于膜表面的CaSO4垢,微波辅助清洗效率高于常规清洗,且在清洗液的温度和流速较低时,微波的强化清洗效果更为明显;对于膜表面的腐殖酸混合垢,微波辅助清洗后的初始通量恢复率为88.4%,比常规清洗高出10.8%,同时可以相对缓解疏水膜的亲水化。

Common pollutants of CaSO4 and humic acid on membrane surface in membrane distillation （MD） process were adopted to investigate the effect of microwave enhanced cleaning of hydrophobic membrane. The results show that for CaSO4 sediment on the surface of membrane, the efficiency of microwave assisted cleaning is higher than that of conventional cleaning, and the microwave enhancing effect is more obvious when the temperature and flow velocity of cleaning fluid are lower. As for humic acid sediment on the membrane surface, the initial flux recovery ratio is 88.4% through microwave assisted cleaning, which is 10.8% higher than that of conventional cleaning. And microwave assisted cleaning can alleviate hydrophilization relatively at the same time.