Vapor liquid contact tray with two-stage downcomer

Details Vapor liquid contact tray with two-stage downcomer Vapor liquid contact tray with two-stage downcomer

1998-05-12

2000-06-20

Bushey, C. Scott

Gas and liquid contact apparatus

Contact devices

Wet baffle

2611145, B01F 304

Patent

active

060768134

ABSTRACT:
A vapor-liquid contact tray (16) is provided with an upstream downcomer (46) and a downstream downcomer (48) which form a two-stage downcomer. The discharge outlet (62) of the upstream downcomer (46) feeds liquid into the downstream downcomer (48) to help seal the discharge outlet (58) of the downstream downcomer (48) against vapor entry at lower liquid flow rates and to allow positioning of the discharge outlet (58) above the height of the weir (66) on the underlying tray (16). Because the upstream downcomer (46) does not discharge liquid directly onto the underlying tray deck (40), the area of the tray deck (40) underlying the upstream downcomer (46) can contain vapor flow apertures (68) to increase the active area and mass transfer efficiency of the tray (16).

REFERENCES:
patent: 2875867 (1959-03-01), Hart
patent: 2902413 (1959-09-01), Kassel et al.
patent: 2909414 (1959-10-01), Gerhold et al.
patent: 4288393 (1981-09-01), Sekiguchi et al.
patent: 4528068 (1985-07-01), Fiocco et al.
patent: 4954294 (1990-09-01), Bannon
patent: 5213719 (1993-05-01), Chuang
patent: 5593548 (1997-01-01), Yeoman et al.
patent: 5618473 (1997-04-01), Sauter et al.

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