热法太阳能管式海水淡化强化技术发展探讨

DISCUSSION ON THE DEVELOPMENT OF INTENSIFIED TECHNOLOGIES IN TUBULAR DESALINATION BASED ON SOLAR HEAT METHOD

针对单效管式蒸馏法热利用率不高、传热效率不高以及单位面积蒸发量小以致淡化效率较低等问题,归纳了国内外利用多效潜热、外部强化冷凝以及内部强化蒸发等强化技术,来提高管式蒸馏淡化的产水率的研究进展。分析表明,随着微纳表面改性技术的不断成熟,改变换热管传热面的特性(亲水性或疏水性)从而提高淡化器产水性能,为太阳能管式蒸馏技术的应用提供了理论基础和技术支持,是未来强化技术的重要研究方向。

But the current ways of s/ngle tubular distillation have low utilization of latent heat, low heat transfer efficiency and less evaporation per unit area, which can lead to low efficiency of desalination and some other problems. Considering the limitedness of single effect tubular still, this paper summarizes such intensified technologies as multi-effect utilization of latent heat, external reinforcing condensation and internal reinforcing evaporation, and they can improve the water production rate of tubular distillation. The analysis shows that the development of micro-nano modification technology makes heat exchange tube forming the surface of hydrophilic or hydrophobic characteristics to improve the heat transfer performance of desalination device, which can serve as theoretical basis and technological support for the application of solar-energy tubular distillation technology. It is an important research direction of intensified technologies in the future.