Comparative Study Of Mass Transfer Performance For Trays

In this paper, mass transfer performance of wave-directed floating valve trays and cross-type valve trays were simulated, compared by using Aspen Plus software in a diameter of750mm stainless column with4trays. Cyclohexane-normal heptane were selected as research media and RK-SOAVE was used as thermodynamic method. The influences of F-factor, hole area and outlet weir height on the mass transfer efficiency were observed. Simulation results of wave-directed floating valve trays and cross-type valve trays are also compared with Fl valve floating trays. The simulation results were similar to experimental data, and reflected the mass transfer condition of the column. The results showed that:Hole area percent had a significant impact on the tray efficiencies of wave-directed floating valve trays and cross-type valve trays from the scope of8.47%to15.68%; In the experiment scope of outlet weir height from30mm to70mm, with the increment of outlet weir height the wave-directed floating valve trays was performed as the best one among three kinds of trays. In addition, engineering experimental data fitting system was used to get the tie-in equation between tray efficiency and F-factor. Some critical data that was hard to achieve in experiment were ob to obtained. This paper will provide foundation for industrial design and scale-up.