Expansion ring for mass transfer column and method employing...

Details Expansion ring for mass transfer column and method employing... Expansion ring for mass transfer column and method employing...

B - Operations, Transporting

01

D

B01D 3/32 (2006.01) B01D 3/00 (2006.01)

Patent

CA 2522584

A mass transfer column (10) is provided with at least one vapor-liquid contact tray (12) that is disposed within the open internal region (14) defined by a shell (16) of the column (10). At least one expansion ring (26) underlies and supports the vapor-liquid contact tray (12). An expander (38) is associated with first and second end segments (32, 34) of the expansion ring (26) that define a cutout (36) in the expansion ring (26). The expander (38) includes brackets (48) welded to the end segments (32, 34) and a threaded member (50) that extends through the brackets (48) and carries nuts (54). Turning the nuts (54) against facing surfaces of the brackets (48) causes the first and second end segments (32, 34) of the expansion ring (26) to be forced apart to cause an increase in the circumference of the expansion ring (26), thereby sealing the expansion ring (26) against the inner surface of the column shell. At least one seal plate (58) is positioned on the threaded member (50) to block the cutout (36) in the expansion ring (26). Rods (27) extend between the expansion ring (26) and a support ring (24) that is welded to the column shell (16) to transfer a portion of the load carried by the expansion ring (26) to the support ring (24).

L'invention concerne une colonne de transfert de masse (10) comprenant au moins une plaque de contact vapeur-liquide (12) disposée dans une zone intérieure (14) définie par une enveloppe (16) de la colonne (10). Au moins une bague d'extension (26) est située sous la plaque de contact vapeur-liquide (12) et supporte cette dernière. Un élément d'extension (38) est associé à des premier et second segments terminaux (32, 34) de la bague d'extension (26), ces segments définissant une ouverture (36) dans la bague d'extension (26). L'élément d'extension (38) comprend des éléments de fixation (48) soudés aux segments terminaux (32, 34) et un élément fileté (50) s'étendant à travers les éléments de fixation (48) et supportant des écrous (54). La mise en rotation des écrous (54) contre des surfaces se faisant face des éléments de fixation (48) amène lesdits premier et second segments terminaux (32, 34) de la bague d'extension (26) à se séparer, ce qui augmente la circonférence de la bague d'extension (26), d'où l'entrée de la bague d'extension (26) en contact étanche avec la surface intérieure de l'enveloppe de la colonne. Au moins une plaque d'étanchéité (58) disposée sur l'élément fileté (50) permet de bloquer l'ouverture (36) dans la bague d'extension (26). Des tiges (27) s'étendent entre la bague d'extension (26) et une bague de support (24) soudée sur l'enveloppe (16) de la colonne en vue du transfert d'une partie de la charge supportée par la bague d'extension (26) à la bague de support (24).

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