Downcomers for vapor-liquid contact trays
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United States of America Patent
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-
Apr 25, 2000
Grant Date -
N/A
app pub date -
Sep 4, 1998
filing date -
Sep 5, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vapor-liquid contact tray (36) is provided with a tray deck (40) and an upstream downcomer (48) and a downstream downcomer (50) positioned at an opening (46) in the tray deck (40). The upstream downcomer (48) has at least two spaced apart legs (64) extending downwardly at a lower end thereof to carry liquid downwardly. The spacing between the legs (64) allows vapor to flow between the legs (64) so that the upstream downcomer (48) does not completely block the desired vapor flow pattern in the area of the downcomer (48). Each leg (64) includes a deflector (68) extending downwardly from a discharge outlet (66) to shield the discharged liquid from the vapor stream and to deflect the downward momentum of the liquid stream.
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