Research On Tray Efficiency Of Wave Directed Float Valve Tray Under Partial Reflux Experiment

The effects of different position, different open porosity, reflux ratios and F-factors on the tray efficiency and overall column efficiency of wave directed float valve trays were studied in a column with a diameter of 750mm, plate spacing of 600mm, weir length of 550mm, weir height of 50mm,4 piece plates using cyclohexane-n-heptane system under the conditions of partial reflux and atmospheric pressure. Its overall column efficiency was also compared with which of F1 float valve trays and the cross-type valve trays. The reflux ratio, open porosity, operation parameters and physical parameters were considered as variables, according to dimensional analysis efficiency model for wave directed float valve trays were established. The experimental value was compared with the A.I.Ch.E model value, the Chen, Chuang model value and the established efficiency model value. Meanwhile, the experiment’s deviation was estimated by sampling repeated more times. The study results show that, at the same operational conditions, the reduction of open porosity was benefit for increasing the tray efficiency. At the same open porosity, the smaller reflux ratio, meant to the worse mass transfer performance. At the, the overall column efficiency of wave directed float valve tray is higher than that of F1 float valve tray and cross-type valve trays. According to the comparasion between the experimental value and three modle values, the established efficiency model for wave directed float valve trays was more close to the experimental value, the deviation was within 10%, this model can provide an important reference for designing the future industrial production equipment.