Converting mist flow to annular flow in thermal cracking...

Details Converting mist flow to annular flow in thermal cracking... Converting mist flow to annular flow in thermal cracking...

C - Chemistry, Metallurgy

10

G

C10G 9/00 (2006.01) C10G 9/36 (2006.01)

Patent

CA 2489876

A process to increase the non-volatile removal efficiency in a flash drum in the steam cracking system. The gas flow from the convection section is converted from mist flow to annular flow before entering the flash drum to increase the removal efficiency. The conversion of gas flow from mist flow to annular flow is accomplished by subjecting the gas flow first to at least one expander and then to bends of various degrees and force the flow to change directions at least once. The change of gas flow from mist to annular helps coalesce fine liquid droplets and thus being removed from the vapor phase.

L'invention concerne un procédé visant à améliorer l'efficacité de séparation des produits non volatils dans un ballon de détente de système de craquage à la vapeur. Le flux de gaz de l'unité de convection est converti de flux brouillard en flux annulaire avant l'arrivée dans le ballon de détente, ce qui permet d'accroître l'efficacité de séparation. Pour cette conversion, on soumet d'abord le flux de gaz au moins à un dispositif d'expansion puis à des courbures selon des degrés différents, contraignant le flux à changer de direction au moins une fois. La conversion considérée contribue à la coalescence des fines gouttelettes de liquide et donc à leur séparation depuis la phase vapeur.

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