The Study On Structures And Performances Of The Jet-Type Solid Series Mass-Transfer Tray

Based on the structure of new vertical sieve tray, through reformed LLC-Tray form a sort of new type tray. Using air-water system .the article do the experiment at rectangle tower, which is 600*800, in order to viewresearch the effects of operational conditions, different kinds of geometry and properties of matter on the hydrodynamic performances ,for example pressure drop, entrainment, as well as weeping etc, and get the followed result:1 .The dry-plate pressure drop of LLC-Tray is far below that of new vertical sieve tray and is in directly square proportion to the hole-air-speed of LLC-Tray;2.The wet-plate pressure drop fundamentally is nothing to do with the bottom porthole and the perforate rate of sprinkler plate, only with the hole-air-speed of the tray and the liquid height on the tray to proportional relation.3. The effects of bottom porthole and the intensity of liquid flow on entrainment are on the small side, but the effects of the hole-air-speed of the tray, the liquid height on the tray and the perforate rate of sprinkler plate are relatively bigger;4.The weeping quantity quickly increases with the decrease of hole-air-speed and the experimental results account the weeping is only with the hole-air-speed of the tray;5. The liquid height on the tray increases with the increase of the intensity of liquid flow and the height of weir, but, fundamentally, the effect of the hole-air-speed is relatively smaller;6.The quantity of hold-up liquid to space increases with the increase of the liquid height on the tray, but decrease with the increase of;T.The distribution of dry-plate pressure in the cap is intrinsically misproporte . The pressure of each pressure-sensing points increases with the increase of the hole-air-speed and the average pressure of each piezometric surface appears minima at the skirt section along the portrait height of the cap;S.The density of liquid has notable effect on the hydrodynamics of the tray expectarct weeping; the quantity of weeping increases with the increase of the density of liquid.At the same time, the article also do some preliminary approachs about the hydrodynamic performances of the compound tray, in the hope of doing some help for the future research.