Hydrodynamics And Efficiency Analysis Of Vertical Spray Packing Tray

Combination column trays are one of the important design ideas for developing novel trays.The combination column trays combine two or more column internals taking their advantages for better performance.According to the idea,this work has developed a novel vertical spray column tray(VSPT tray),which has the advantages of high capacity and better efficiency.The novel tray combines the column tray and structure packing,introducing structure packing on top of the vertical cap to improve two-phase contact.In this research,the main experiment equipment is the plexiglass column with an inner diameter of 500mm and a plate spacing of 450mm.In this project,the hydrodynamics and mass transfer performance of four new trays with different structure sizes were studied with air-water system.The hydrodynamics performance includes wet pressure drop,tray weeping,tray entrainment and clear liquid height,and the tray efficiency was measured with water-air-oxygen system.The research has shown the effect of sieve hole diameter,structure packing,and two-phase capacity on the tray performance,besides comparison of the Vertical Spray Packing Tray and New VST tray was carried out.Correlations of dry pressure drop and wet pressure drop were developed by regression of the experiment data and the results has shown.The error of calculated data and experiment data was less than ± 5%.In addition,the fundamental model of dry pressure drop of the novel tray was produced mechanically.And the error of model data and experiment data was less than ±10%.The work has shown that the vertical spray packing tray has characteristics of low pressure drop,little entrainment,high capacity and better mass transfer performance.