화학공학소재연구정보센터
Chemical Engineering Research & Design, Vol.74, No.8, 893-900, 1996
Prediction of Packed Sieve Tray Efficiency in Distillation
The mass transfer efficiencies of a packed sieve tray and a sieve tray have been measured for the distillation of six binary mixtures. These mixtures cover a wide range of physical properties. The efficiency of the sieve tray was found to increase significantly by adding a layer of mesh packing on the tray which can be attributed to a higher interfacial area, longer vapour/liquid contact time (i.e. higher froth height) and a lower liquid backmixing. An efficiency model for the packed sieve tray was developed by combining a fundamental point efficiency model and the correlation of liquid mixing for the packed sieve tray. The point efficiency model is based on the analysis of the dispersion structure and zone contribution on the tray and experimentally measured values of tray efficiency in the distillation of six binary mixtures. The predicted point efficiencies for packed sieve tray agree with measured values with an average error of 3.9%.