表面疏水改性下管式海水淡化器性能研究

Study on the Performance of Tubular Desalination Device by Hydrophobic Modification

设计了1种表面疏水改性的管式海水淡化器,并进行定功率加热和不同介质气体条件下的实验研究,分析了淡化器表面疏水改性后的产水性能。结果表明,不同加热功率时,疏水改性型淡化器累计运行9 h的产水量和性能系数均要高于光滑管型淡化器,加热功率为200 W时,疏水改性后淡化器的累计产水量和性能系数分别为2639 mL和0.77,较未改性前提高了23.9%;不同介质气体实验中,二氧化碳、氧气、氮气、氖气作为介质气体时,均能不同程度提高产水性能;介质气体为氖气时,2种管型淡化器的累计产水量差最大(196 mL),更有利于提高管内滴状冷凝效率。

A tubular desalination device with surface hydrophobic modification was designed. The experimental study was carried out at constant power heating and different medium gas conditions, the water production performance of the device after surface hydrophobic modification was analyzed. The result showed that, the total water yield and the performance ratio （PR） of the hydrophobic modified distillation were higher than that of the smooth tube type distillation, after constant power heating for 9 h. When the heating power was 200 W, the total water yield and the PR of the distillation with hydrophobic modification were 2 639 mL and 0.77, respectively, which were 23.9% higher than the distillation without modification. In the experiment with different medium gas, carbon dioxide, oxygen, nitrogen, neon as the medium gas could improve the water production performance to a certain extent. When the medium gas was neon, the difference in the total water production capacity of the two tubular distillation devices was the largest （196 mL）, which was more beneficial to improve the drop efficiency in the tube.