Distributor assembly for multi-bed down-flow catalytic reactors

Details Distributor assembly for multi-bed down-flow catalytic reactors Distributor assembly for multi-bed down-flow catalytic reactors

B - Operations, Transporting

01

J

B01J 8/04 (2006.01)

Patent

CA 2194214

A multi-bed, down-flow reactor (10) includes several distributor assemblies (20) each having a centrally located mixing chamber (30) and an annular collecting and mixing trough (24) surrounding the mixing chamber (30). The mixing chamber (30) has an inlet (36) at one side thereof, an outlet (37) in its bottom wall (25), and a quench gas inlet (38) in its top wall (35) above the outlet (37). A divider wall (40) traverses the annular trough (24) adjacent to the inlet (36) to cause the pool of liquid collected in the trough (24) to flow in a circular pattern around the mixing chamber (30) to the inlet (36). This ensures that the liquid circulating through the trough (24) is well mixed with the liquid raining down from the catalyst bed. Turbulent and spiraling flow patterns generated within the chamber further mix the liquid and gas and entrain quench gas in the liquid and gas stream.

Réacteur catalytique multi-lits à écoulement descendant (10) comportant plusieurs ensembles distributeurs (20) dont chacun possède une chambre de mélange (30) placée au centre et entourée d'une auge annulaire (24) de collecte et de mélange. La chambre de mélange (30) comporte un orifice d'admission (36) sur un côté, un orifice de sortie (37) pratiqué dans sa paroi inférieure (25), et un orifice d'admission de gaz de coupage (38) pratiqué dans sa paroi supérieure (35), au-dessus de l'orifice de sortie (37). Une paroi de séparation (40) traverse l'auge annulaire (24) à côté de l'orifice d'admission (36) afin que la mare de liquide recueilli dans l'auge (24), s'écoule selon une trajectoire circulaire autour de la chambre de mélange (30), en direction de l'orifice d'admission (36). Cela assure le mélange efficace du liquide circulant à travers l'auge (24) avec le liquide tombant en pluie du lit du catalyseur. Les configurations d'écoulement turbulent et en spirale créées à l'intérieur de la chambre mélangent encore davantage le liquide et le gaz et entraînent le gaz de coupage dans le flux de liquide et de gaz.

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