Vapor-liquid contact tray and method employing same

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 3/30 (2006.01) B01D 3/20 (2006.01) B01D 3/22 (2006.01) B01D 53/18 (2006.01)

Patent

CA 2490317

A vapor-liquid contact tray (26) is provided with a tray deck (28) having at least one opening for removing liquid from an upper surface of the tray deck and a plurality of vapor passages (44) for allowing vapor to flow upwardly through the tray deck to interact with the liquid on the upper surface. At least one can (34) extends upwardly from the tray deck and is formed by a perimeter wall (36). A downcomer (46) is interposed within the can to provide a passageway for liquid and has an upper inlet (50) for liquid entry and a lower outlet (54) above the tray deck (28) for feeding liquid into the can and onto the tray deck. A plurality of deflector blades (56) are positioned above the tray deck to induce a swirling movement in the vapor ascending into the can. The portion of the tray deck surrounded by the perimeter wall of the can contains sieve holes, valves or other types of vapor passages. The tray may further include a sleeve (76), a plurality of cans (34) of two or more sizes or combinations thereof.

Un plateau de contact (26) pour la vapeur et le liquide est pr~vu avec un support (28) comportant au moins une ouverture servant ~ ~vacuer le liquide d'une surface sup~rieure du support et une pluralit~ de passages (44) pour la vapeur permettant ~ la vapeur de s'~couler en remontant ~ travers le support pour interagir avec le liquide situ~ sur la surface sup~rieure. Au moins un contenant (34) s'~tend verticalement depuis le support et comporte une paroi (36) d~finissant son p~rim­tre. Un espace annulaire (46) est pr~vu dans le contenant pour former un passage pour le liquide, cet espace annulaire comprenant une entr~e (50) sup~rieure destin~e ~ l'entr~e du liquide et une sortie inf~rieure (54) situ~e au-dessus du support (28) pour introduire le liquide dans le contenant et sur le support. Plusieurs lames formant d~flecteurs (56) sont positionn~es au-dessus du support pour induire un mouvement tourbillonnant dans la vapeur montant ~ l'int~rieur du contenant. La partie du support qui est entour~e par la paroi du contenant contient des trous formant tamis, des valves ou d'autres types de passages pour la vapeur. Le plateau peut ~galement comprendre une enveloppe (76), plusieurs contenants (34) ayant au moins deux tailles ou des combinaisons de ces derniers.

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