Comparison of gas-liquid contacting trays

Abstract

The performances of four types of distillation tray of current industrial importance were compared in a common environment under similar hydraulic conditions. The four types investigated were the bubble-cap, sieve, Turbogrid, and ripple trays. A single tray of each type, of representative dimensions, was used. The four trays were compared in regard to hydraulic characteristics, and also in regard to mass transfer efficiencies based on composition changes occurring in the gas phase during gas absorption. The comparison was carried out at relatively low vapor loadings in order to avoid excessive entrainment and channelling.

Nous avons comparé, sous conditions hydrauliques similaires, le comportement de quatre types de plateaux de distillation utilisés couramment dans l'industrie, soit: le plateau à calotte de barbottage, le plateau perforé, le Turbo-grid et le “Ripple Tray”. Un seul de ces plateaux a été utilisé pour étudier les caractéristiques hydrauliques et l'efficacité de transfert de masse basée sur le changement de composition dans la phase gazeuse durant l'absorption d'un gaz. La vitesse de la phase vapeur a été maintenue à un niveau peu élevé afin d'éviter l'entraǐnement excessif et le renardage.