混合箱塔板流体力学性能实验研究

研究开发了一种大通量高效率的混合箱塔板 ,它的非传质区仅占塔截面积的 5 %左右 ,在塔板上设计了用于提高气液传质效率的混合箱结构。在冷模试验塔内对混合箱塔板的压降、漏液、雾沫夹带以及降液管清液层高度等流体力学性能进行了试验 ,试验表明该塔板的漏液和雾沫夹带都比传统筛板有所减少 ,且通量大幅度提高

Study on the Fluid Dynamics Characteristics of Stirring-Box Tray

A patented tray called stirring-box tray has been developed and tested. A number of specially designed stirring-boxes are fixed over the collective sieve holes. The fluid mechanics characteristics of the tray,i.e. pressure drop, weeping, entrainment and liquid height in the downcomer, are determined on a test rig with 1000mm by air-water system at an atmospheric pressure. The experimental results are compared with those of the traditional sieve tray. It indicates that the stirring-box tray has the advantage of lower entrainment and bigger flux. The correlations for calculating the pressure drop of the stirring-box tray are derived from the experimental data. In addition, the liquid stream on the tray bed is pushed by the spurting liquid from the mouth of stirring-box with the same direction of liquid flow on the tray,which can reduce the liquid eddy and backmixing. Theoretically, being well mixed in the stirring-box with the liquid-phase, the vapor-phase leaving the stirring-box will approximately reach equilibrium with the liquid flowing from the box.As a result, the mass transfer efficiency of the tray might increase greatly.