| 摘要 |
A distribution tray for uniform distribution of downwardly flowing vapor and liquid across the cross section of a vessel. The distribution tray has a plurality of holes fitted with downcomers which extends up above the tray. The downcomers have open upper ends and open lower ends and allow for fluid flow from above the tray to below the tray. A liquid conduit is provided for each downcomer with a liquid inlet submerged in the liquid pool on the tray, with a section for upwards flow of liquid and with liquid openings at more elevations in fluid communication with the downcomer. A reduced flow area section and means for improved liquid spread may be used at the outlet of the downcomer. During operation vapor is entering the upper open end of the downcomer. Liquid is collected in a pool on the tray and is flowing through the liquid inlet and into the liquid conduit, upwards through the liquid conduit and through the liquid openings which leads into the downcomer where the liquid is mixed with the downwardly flowing vapor. The two-phase stream is passing the reduced flow area section with increased velocity for improved dispersion of the liquid before the stream is flowing through the means for improved liquid spread. The fluids flow through the lower open end of the downcomer and exit the distributor. |
