Gas and liquid contact apparatus – Contact devices – Porous mass
Reexamination Certificate
1999-11-10
2001-09-25
Bushey, C. Scott (Department: 1724)
Gas and liquid contact apparatus
Contact devices
Porous mass
C261S110000
Reexamination Certificate
active
06293526
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a liquid distributor, in particular for packing columns, and to a column with a liquid distributor of this kind.
2. Description of the Prior Art
A liquid distributor of this kind is known from EP 0 282 753 in which liquid emerges from outlet openings of tubular or trough-like distributor members and is incident as jets on screens which are formed as baffle plates (called conduction walls there). The liquid impacts at relatively high speed on the screen and distributes itself on the latter as a film of parabolic shape. This liquid distributor is provided for a packing column in which a gas is conducted in a counterflow to the liquid. A plurality of parallel distributor members subdivides the upwardly flowing gas into a plurality of partial flows. Drip edges of the screens are arranged beneath the distributor members inside stagnation zones of the gas flow.
Material exchange processes in which very large volume or mass flows are possible for the gases and liquids to be treated can be carried out with separation columns which contain “turbulence packings” (see EP 0 418 338). These large flows however present a problem: The liquid jets incident on the screens produce splashes which have a liberation of fine drops as a result. These drops fall rather slowly in the gas space and are carried along by the upwardly flowing gas in the region of the drip edges. A separation effect which is to be achieved through a material exchange is thereby impaired. It is therefore an object of the invention to create a liquid distributor for packing columns in which the named problems with the splash formation are eliminated or at least defused.
SUMMARY OF THE INVENTION
The liquid distributor for packing columns comprises at least one tubular or trough-like distributor member having outlet openings for an output of liquid in the form of jets. Screens are arranged ahead of the outlet openings onto which the incident liquid jets are deformed to liquid films flowing off. The outlet openings screen the outlet openings against an upwardly flowing gas flow. In the event of a maximum output of liquid the liquid jets are incident onto the screens at angles which are less than 60°, preferably less than 10°.
The liquid distributor in accordance with the invention can of course also be advantageously used in columns which contain ordered packings other than the “turbulence packings”, for example those with a “cross channel structure” (packing with vertical layers of corrugated films which form openly crossing channels; see e.g. EP 0 070 917). Pourings of filler bodies also come under consideration as packings. In addition to a material exchange a heat transfer between a gas flow and a liquid flow can of course also be carried out.
A further problem which arises in the distributor which is known from EP 0 282 753 is solved with this liquid distributor. Because of the asymmetrical arrangement of the baffle walls the flow relationships in the gas flow are unfavorable at the drip edges, namely because no stable liquid films can form about the drip edges as a result of transverse flows. Depending on the gas charging, spray drops are taken along upwardly in greater or lesser amounts. This is also addressed by the present invention.
REFERENCES:
patent: 3313533 (1967-04-01), Powers
patent: 3743256 (1973-07-01), Oplatka
patent: 4009229 (1977-02-01), Szucs et al.
patent: 4159291 (1979-06-01), Bruckert
patent: 4729857 (1988-03-01), Lee et al.
patent: 4855089 (1989-08-01), Michels
patent: 4981265 (1991-01-01), Buhlmann
patent: 5783119 (1998-07-01), Ulrich et al.
patent: 5971370 (1999-10-01), Galabinski
patent: 3013783A1 (1981-10-01), None
patent: 0070917A1 (1983-02-01), None
patent: 0282753A1 (1988-09-01), None
patent: 929314 (1963-06-01), None
Fischer Markus
Moser Felix
Bushey C. Scott
Sulzer Chemtech AG
Townsend and Townsend / and Crew LLP
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