Environ Technol. 2014 Sep-Oct;35(17-20):2147-52. doi: 10.1080/09593330.2014.895050.
Membrane distillation (MD) is an emerging desalination technology as an energy-saving alternative to conventional distillation and reverse osmosis method. The selection of appropriate membrane is a prerequisite for the design of an optimized MD process. We proposed a simple approximation method to evaluate the performance of membranes for MD process. Three hollow fibre-type commercial membranes with different thicknesses and pore sizes were tested. Experimental results showed that one membrane was advantageous due to the highest flux, whereas another membrane was due to the lowest feed temperature drop. Regression analyses and multi-stage calculations were used to account for the trade-offeffects of flux and feed temperature drop. The most desirable membrane was selected from tested membranes in terms of the mean flux in a multi-stage process. This method would be useful for the selection of the membranes without complicated simulation techniques.
膜蒸馏（MD）是一种新兴的海水淡化技术，作为传统蒸馏和反渗透方法的节能替代品。选择合适的膜是优化 MD 工艺设计的前提。我们提出了一种简单的近似方法来评估 MD 过程中膜的性能。测试了三种具有不同厚度和孔径的中空纤维型商业膜。实验结果表明，由于通量最高，一种膜具有优势，而另一种膜则由于进料温度下降最低而具有优势。回归分析和多阶段计算用于考虑通量和进料温度下降的权衡效应。根据多阶段过程中的平均通量，从测试膜中选择了最理想的膜。该方法无需复杂的模拟技术即可用于膜的选择。
