| 摘要 |
A distribution tray for distribution of vapor and liquid across a vessel has a plurality of downcomers extending above the tray and having open upper and lower ends. A liquid conduit for each downcomer has an inlet, a section for upward liquid flow, and openings in fluid communication with the downcomer. A reduced flow area section and a device for improved liquid spread may be used at the outlet of the downcomer. During operation, vapor enters the upper downcomer end. Liquid collected on the tray flows through the inlet, upward through the conduit, and through the openings into the downcomer, where the liquid is mixed with downwardly-flowing vapor. The two-phase stream passes the reduced flow area section with increased velocity for improved dispersion of the liquid before the stream flows through the device for improved liquid spread, and then exits through the lower end of the downcomer.
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