Gas and liquid contact apparatus – Contact devices – Wet baffle
Reexamination Certificate
1998-10-13
2001-01-09
Simmons, David A. (Department: 1724)
Gas and liquid contact apparatus
Contact devices
Wet baffle
C261SDIG007
Reexamination Certificate
active
06170805
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a material exchange column with a packing. The invention also relates to a packing collar of a column of this kind and to a method for installing and/or transporting the column.
2. Description of the Prior Art
A material exchange column is known from EP-A 0 601 257, the packing of which is encircled at various heights in the manner of a belt by wreath elements. The wreath elements—here called collars for short—are manufactured of thin sheet metal lamina and serve for the deflection of the material flows in the column. On the one hand, a gas flow is prevented from flowing in a ring gap adjacent to the packing along the column wall. The gas is deflected into the packing, where it enters into contact with a liquid flowing on the packing. On the other hand, the liquid which enters onto the column wall from the packing is guided back into the packing by the collars.
The packings named in EP-A 0 601 257 are as a rule built up of a plurality of filler bodies. In a particularly advantageous embodiment, a filler body has layers of corrugated lamella with channels which cross one another in an open manner. The lamella are arranged in parallel and directed in direction of the column axis. For large column diameters, the individual filler bodies are assembled from a plurality of segments. Usually such packings are installed filler body by filler body into a vertically standing column; at the same time at least one collar is inserted with each filler body into the ring gap at the edge of the packing. During the installation of the packing, i.e. when it is being built into the column, the collars must be handled with care. Deformations must be avoided which would impair the deflection function of the collars.
SUMMARY OF THE INVENTION
The named packing with openly crossing channels also permits installations when the column is in the horizontal position. An installation of this kind is advantageous, and indeed, particularly when the packing—such as for example, in the manufacture of rectifier columns for the decomposition of air—is installed at a first location and the column is to be operated at a second location. When the location is being changed, the column must be transported in the horizontal position. Measures must be taken in order that the inserts of the column are not damaged by the transport. The collars, which are manufactured of thin sheet metal, are the most endangered during transport. The collars also pose a problem already during the installation of a packing. It is therefore an object of the invention to provide means which permit the installation of the packing and the transport of the column when the column is horizontally oriented. The object is satisfied by a column with suitably formed collars described in detail hereinbelow.
The material exchange column contains a packing which can be installed in the horizontal position of the column. The column has a ring gap between the packing and the column wall in which collars are arranged. The latter each comprise a band-shaped region which lies in contact with the packing. At the upper edge of the band-shaped collar region, there adjoin spring-elastically connected surface pieces which produce a bridge to the wall of the column and which are provided for a return conduction of the liquid from the wall of the packing during the operation of the column. It applies at least for some of the collars in accordance with the invention that the latter have elevations in their band-shaped regions which hold the ring gap open in a form-stable manner under the load of the packing when the column lies horizontally.
REFERENCES:
patent: 5456865 (1995-10-01), Pluess
patent: 2 676 371 (1992-11-01), None
patent: WO 96/40428 (1996-12-01), None
Heiniger Fritz
Hug Albert
Moser Felix
Hopkins Robert
Simmons David A.
Sulzer Chemtech AG
Townsend and Townsend / and Crew LLP
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