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标题：The effect of packing on direct contact evaporation in spray column
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作者：Runzhi Hu ; Yanchao Jin ; Qunwu Huang 等
期刊名称：Canadian Journal of Chemical Engineering
印刷版ISSN：0008-4034
出版年度：2017
卷号：95
期号：11
页码：2209-2220
DOI：10.1002/cjce.22856
语种：English
出版社：Chemical Institute of Canada
摘要：Abstract The direct contact evaporation in countercurrent spray column has been experimentally investigated. Two kinds of random packing were added into the column independently to study their influence on heat transfer process. Three different continuous phase flow rates (150, 200, 250 L/h) and two different dispersed flow rates (6.565, 13.13 L/h) were used in the experiment. The inlet continuous phase temperature ranged from 42 to 57 °C, and the inlet dispersed phase temperature was near its boiling point. The effect of variable factors on the optimal column height, the volumetric heat transfer coefficient, the pressure drop, and the thickness of foam layer were studied. The results showed that packing had positive effects on heat transfer, such as decreasing the optimal column height and the thickness of foam layer, increasing heat transfer coefficient. But extra pressure was also obvious. Dixon rings performed better than Raschig rings in the experiments due to their finer structure.
关键词：endirect‐contact evaporationDixon ringsRaschig ringsheat transfer