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A valve-tray assembly for vapor liquid contact towers. The active area of the tray beneath an upper downcomer is constructed with directional thrust valves facilitating oriented vapor flow therethrough and improving mass transfer efficiency. The valves include first and second support legs oriented into the liquid flow with the first leg having a wider surface area presented to the flow for diverting the flow therearound.

The width of the first leg is less than the diameter of the valve aperture, about which the liquid is induced to flow into engagement with the vapor passing therethrough. The valve assembly is used in conjunction with, and outwardly of, a raised active inlet area to further control initially directed liquid flow from the perforated inlet area beneath the downcomer.

49-09-11 Binkley et al. 261/114.1 49-08-21 Chen et al. 261/112.2 49-03-20 Binkley et al. 2778 1989-06-27 Chen et al.

A multiple downcomer tray assembly for vapor liquid contact towers. Various techniques have been developed for increasing the tray active area in process column designs. For example, U.S. Ballast Tray Design Manual, Glitsch, Inc., Bulletin No. Owner name: 4900 SINGLETON, L.P., TEXAS. Glitsch Inc., Dallas, Tex.,1974. Glitsch, Inc., Ballast Tray Design Manual, Bulletin 4900, 6th ed., 1993. Lockett, Distillation Tray Fundamentals, Cambridge University Press, Cambridge.

2857 1988-03-08 Lee et al. 2247 1986-08-05 Chen et al. 2022 1986-07-29 Yoneda et al. 261/114R 45-07-01 Chen 2000 1985-10-29 Bentham 261/114R 45-09-24 Yamato et al.

261/1 1985-03-12 Chuang et al. 261/114R 44-02-12 Kirkpatrick et al. 261/114JP 43-08-17 Sonnedecker et al. 261/114VT 41-04-15 McClain 239/5 1978-10-31 McClain 239/5 1978-10-03 Burin et al. 261/114VT 39-07-13 Glitsch et al. 261/1 1976-05-25 Kitterman 2281 1975-01-21 Uchiyama 261/114VT 38-06-11 Price 261/114VT 37-11-06 Nutter 261/114.4 34-11-12 Bruckert 261/1 1967-09-26 Winn et al. 261/1 1966-11-22 Nutter 261/1 1966-04-12 Huggins et al.

261/1 1966-02-08 Glitsch et al. 1414 1965-11-02 Van't Sant 261/114.4 31-08-25 Forgrieve 261/1 1963-04-30 Glitsch 261/1 1963-03-05 Glitsch et al. 261/1 1963-02-26 Winn 261/1 1962-06-05 Glitsch 261/1 1962-01-30 Glitsch 261/1 1961-12-19 Glitsch 261/1 1961-11-14 Glitsch et al. 1404 1960-11-08 Eld et al.

261/1 1960-09-06 Nutter 261/1 1952-09-23 Glitsch 261/1 1952-01-15 Glitsch 189/34. FIELD OF THE INVENTION The present invention pertains to gas-liquid contacting trays and, more particularly, an improved valve-tray assembly incorporating directional thrust valves and tray construction for higher efficiency operation. HISTORY OF THE PRIOR ART Distillation columns are utilized to separate selected components from a multicomponent stream. Generally, such gas-liquid contact columns utilize either trays, packing or combinations thereof. In recent years the trend has been to replace the so-called 'bubble caps' by sieve and valve trays in most tray column designs, and the popularity of packed columns, either random (dumped) or structured packing have been utilized in combination with the trays in order to effect improved separation of the components in the stream.