Patent ID: 8349182

Claim:
A device comprising: A. at least one granular bed of a multistage column having a succession of support plates, each support plate (P) supporting a bed of granular solid and being divided into panels (Pa), wherein each panel is equipped with a collecting baffle that has an outlet opening, and B. a fluid distribution device comprising the following three elements disposed from top to bottom in the direction of fluid flow: a) a solid jet breaker ( 9 ) located approximately in the axis of the outlet opening of the collecting baffle of the panel (Pa) and centered on the axis of said collecting baffle; b) an intermediate perforated plate ( 8 ) extending laterally beyond the jet breaker over a width in the range from the width of said jet breaker to a higher value equal to half the width of the panel plus or minus 5 cm, and extending over less than the entire section of the panel (Pa), and with a degree of opening in the range 15% to 30%; c) a distribution plate ( 7 ) extending over the entire section of the panel (Pa), and with a degree of opening in the range 7% to 15%, and wherein said fluid distribution device is applied to each panel (Pa) of the support plate (P) equipped with the collecting baffle ( 5 ) located immediately upstream of the fluid distribution device.