应用于MVR蒸发系统的折板汽液分离器性能研究

Performance study of vane vapor-liquid separator for MVR evaporation system

针对机械蒸汽再压缩蒸发系统中常规折板汽液分离器对微小液滴分离效率低下的不足,设计了一种带凹槽的折板汽液分离器。采用Fluent数值模拟比较了常规和带凹槽2种汽液分离器的流动和分离特性,并进一步研究了凹槽高度、宽度、深度对汽液分离器分离效率、压降及综合性能参数的影响。研究结果表明:汽液分离器上设置凹槽可以显著提高粒径4~7μm液滴的分离效率;凹槽越窄,汽液分离器综合性能越好;最适宜的凹槽深度为1.5 mm,最适宜的凹槽高度为5 mm,此时新型汽液分离器综合性能最佳。

A novel vane separator witli rectangle groove,which can be used in mechanical tion system,is designed to improve separation efficiency of conventional vane vapor-liquid separator for small droplets. The flow andseparation characteristics are analyzed using Fluent simulation method. The effects of groove height, width and depth on separation e f i-ciency,pressure drop and comprehensive parameters are further studied. The simulation results showthat the presence of groove canincrease the separation efficiency of droplets with diameters in range of 4 ＇m to 7 ＇m. The comprehensive performance of the novel separator is better with the groove becoming narrower. The best comprehensive performance can be obtained when groove depth and height are 1.5 mm and 5 mm,respectively.