Fluid handling – Systems
Reexamination Certificate
1999-10-12
2001-02-20
Chambers, A. Michael (Department: 3753)
Fluid handling
Systems
C251S118000, C137S315010
Reexamination Certificate
active
06189566
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a liquid distributor for column packings and to uses of the liquid distributor.
A liquid distributor comprises submembers with output points for the medium to be treated in the column. Submembers of this kind are arm channels, main channels, pre-distribution channels or distributor tubes. The output points are base holes, lateral holes, tubelets and/or slits. In a multiple stage liquid distributor the output points can also be the transition points from one stage to a following stage.
An apparatus for the gravimetric liquid distributor for material and heat exchange columns by means of which a liquid medium is supplied to a column packing is known from EP-B 0 118 029. The teaching of this specification relates to a uniform distribution in relation to a problem which is connected with the apparatus itself, namely a practically inevitable inclined position of the distributor system, which is as a rule slight but is nevertheless not negligible. A uniform distribution can also be impaired by properties of the medium to be treated. This is the case when the liquid medium consists of a material or a mixture of materials which tends to the development of inhomogeneities. Inhomogeneities of this kind can arise through the segregation of multiple phase media such as, for example, emulsions, through depositions from suspensions or through the polymerization of a material to be treated.
The formation of inhomogeneities is to be expected principally at locations with stagnating flow. The distributor comprises at least one submember with a row of output points for the liquid medium, with at least one of the output points taking on a last position in the submember with respect to the flow direction of the medium. In the last output point or output points there are zones with stagnating flow.
SUMMARY OF THE INVENTION
The object of the invention is to create a liquid distributor for column packings in which the named problem with the formation of inhomogeneities is defused. This object is satisfied by the distributor in that suitably designed flow directors are built into the submembers.
The liquid distributor for column packings is provided for the supply of a liquid medium which consists of a material or of a material mixture and which tends to the development of inhomogeneities, for example as a result of a segregation or of a polymerization. This distributor comprises at least one submember with a row of output points for the liquid medium, with at least one of the output points assuming a last position in the submember with respect to the flow direction of the medium. In the last output point or output points a flow director is arranged in or at the submember, through which a through-flow of the medium can be effected in regions at which a stagnation of the flow would occur without the flow directors.
Thanks to the use of flow directors in accordance with the invention the medium to be distributed is set into a state of movement in which stagnating flow zones are eliminated.
REFERENCES:
patent: 3936262 (1976-02-01), Hehl
patent: 4586540 (1986-05-01), DeLord
patent: 5209259 (1993-05-01), Dear et al.
patent: 5680989 (1997-10-01), Plachy et al.
patent: 873352 (1979-05-01), None
patent: 717907 (1965-09-01), None
patent: 0118029 (1984-09-01), None
Chambers A. Michael
Sulzer Chemtech AG
Townsend and Townsend / and Crew LLP
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