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The effect of packing on direct contact evaporation in spray column
Author(s) -
Hu Runzhi,
Jin Yanchao,
Huang Qunwu,
Wang Yiping,
Cui Yong
Publication year - 2017
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22856
Subject(s) - raschig ring , pressure drop , materials science , boiling point , countercurrent exchange , evaporation , heat transfer , heat transfer coefficient , packed bed , inlet , phase (matter) , volumetric flow rate , boiling , analytical chemistry (journal) , composite material , thermodynamics , chromatography , chemistry , mechanical engineering , physics , organic chemistry , engineering
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.