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通过SiO₂减轻空气隙膜蒸结晶中的湿化和缩放

Stefanie Flatscher¹, Mark W Hlawitschka¹, Wolfgang M Samhaber¹

¹Institute of Process Engineering, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria.

|October 28, 2025

概括

用SiO2纳米颗粒进行异质播种,通过增强流量和防止在高盐废水处理中使膜湿透,显著提高了膜蒸结晶 (MDCr) 性能.

科学领域:

化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学
环境科学环境科学

背景情况:

膜蒸结晶 (MDCr) 对于高盐废水处理和零液体排放 (ZLD) 系统至关重要.
性能限制包括度极化,缩放和膜湿.
不同质种植对MDCr稳定性和晶体生长的影响需要进一步进行定量研究.

研究的目的:

为了研究异质播种对300克L-1 NaCl溶液空隙MDCr (AGMDCr) 性能的影响.
评估播种对流体稳定性,防湿性和晶体生长动态的影响.
在种子条件下比较聚烯 (PP) 和聚四乙烯 (PTFE) 膜的性能.

主要方法:

使用具有不同度SiO2种子 (0.1-0.6gL-1) 的PP和PTFE膜对AGMDCr的实验研究.
在种子和未种子条件下分析透流,盐排斥和晶体大小分布.
基于材料特性和模块设计的膜性能比较.

主要成果:

0.1g的L-1SiO2播种将稳定状态的透流量提高了41%,并保持了≥99.99%的盐排斥,有效地抑制了湿.
种植通过减少初级核形成,将晶体大小分布转移到更大的晶体 (230-340μm).
高种植度 (0.6g L-1) 导致由于固体的阻滞而导致流量减少;PTFE膜的流量比PP膜高47%.

结论:

适当大小和剂量的SiO2播种有效地稳定了MDCr中的流量并抑制了湿.
不同质的播种提供了一种可行的策略,可以通过MDCr克服超盐废水处理的关键局限性.
在测试条件下,PTFE膜在AGMDCr中表现优于PP膜.

关键词:

空气隙膜蒸蒸的时间膜浸湿湿的情况播种结晶化结晶化

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