Co-current contacting separation tray design and methods for...

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 3/14 (2006.01) B01D 3/20 (2006.01) B01D 3/26 (2006.01) B01D 3/32 (2006.01) F02M 11/00 (2006.01)

Patent

CA 2327274

A tray design for use in a separation column (2) for distilling or fractionating a feed stream is provided that incorporates co-current contact of the liquid and vapor streams and their subsequent separation on each tray (6). Located on the trays are a plurality of co-current vapor and liquid contacting sections (16). Also located in the trays are a plurality of de- entrainment devices (8) for separating entrained liquids from a vapor stream, the de-entrainment devices having an inner (25) and an outer side (27). The tray design further incorporates a plurality of downcomers (14), having an upper portion (13) and a lower portion (15), where the upper portion of the liquid downcomer is capable of accepting liquid from the outer side of the de- entrainment device of a first tray, and the lower portion of the liquid downcomer is located within the co-current contacting section of a second tray. The trays further contain vapor openings (22) located through the bottom (24) of the trays.

L'invention concerne une structure de plateau convenant pour une colonne (2) de séparation servant à la distillation ou au fractionnement d'un flux de charge. Cette structure de plateau provoque un contact cocourant entre les flux de liquide et de vapeur et leur séparation subséquente sur chaque plateau (6). Sur les plateaux se trouvent une pluralité de sections (16) dans lesquels les courant parallèles de vapeur et de liquide entrent en contact l'un avec l'autre. Les plateaux sont en outre équipés d'une pluralité de séparateurs (8) de gouttelettes permettant de séparer les liquides entraînés dans le flux de vapeur, ces séparateurs présentant un côté (25) interne et un côté (27) externe. Cette structure de plateau comprend en outre une pluralité de tubes (14) de retour comprenant une partie (13) supérieure et une partie (15) inférieure. La partie supérieure du tube de retour peut recevoir le liquide provenant du côté externe du séparateur de gouttelettes d'un premier plateau, et la partie inférieure du tube de retour pour liquide est placée dans les sections de contact cocourant du second plateau. Les plateaux comprennent en outre des ouvertures (22) pour vapeur traversant le fond (24) des plateaux.

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