Collect. Czech. Chem. Commun. 1985, 50, 2685-2696

Theoretical and experimental investigation of the function of the wall flow deflecting ring. A single ring

Vladimír Staněka, Krumm Semkovb, Nikolai Kolevb and Georgii Paskalevb

a Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol, Czechoslovakia
b Central Laboratory of Chemical Process Fundamentals, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria


Theoretical model has been formulated of the flow of liquid in a randomly packed trickle bed column equipped with special wall flow deflecting rings (WFDR). Solutions have been obtained of the model for the case of a single ring. Theoretical results have been compared with experimental distributions of liquid in a 188.6 mm in diameter column packed with 25 mm Raschig rings and equipped with a single WFDR. Reasonable agreement of the theory with experimental results has been found and the theory is felt to be important in the future for optimizations of the number, size and spacing of the WFDR's to be used in industrial columns to check the extent of the flow on the wall.