Fractionation trays

Details Fractionation trays Fractionation trays

B - Operations, Transporting

01

D

B01D 3/20 (2006.01) B01D 3/22 (2006.01)

Patent

CA 2277214

A fractionating column (1) is provided which has perforated fractionating trays (2) and downcomers (7) allowing liquid to flow from one tray to the tray immediately below, said downcomers being provided with radial outflow ports (4) directing downflowing liquids towards the column wall rather than onto the surface of the tray directly below the downcomer. This permits at least a portion of the under-downcomer area to be perforated thereby increasing the capacity of the tray for vapor/liquid contact and ensuring that weeping of the liquid through the perforations is avoided without need for an increase in vapor pressure.

L'invention concerne une colonne (1) de fractionnement comprenant des plateaux (2) de fractionnement perforés et des déversoirs (7) permettant l'écoulement d'un liquide d'un plateau vers le plateau placé immédiatement dessous, lesdits déversoirs étant pourvus d'orifices (4) d'écoulement radial envoyant les liquides à courant descendant vers la paroi de la colonne plutôt que sur la surface du plateau immédiatement au-dessous du déversoir. Ceci permet au moins la perforation d'une partie de la zone se trouvant sous le déversoir, ce qui a pour effet d'augmenter la capacité du plateau pour un contact vapeur/liquide et d'éviter l'écoulement du liquide par les perforations, sans avoir à augmenter la pression de vapeur.

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