Distribution system using meridian panels for a simulated moving bed separation method using N columns in series

A distribution and collection device for the simulated moving bed separation units with a diameter of greater than 4 meters, the unit comprising at least one column divided into N beds of adsorbent, each bed being divided into meridian panels, i.e. into panels that are mutually parallel and contiguous so as to ensure complete coverage of the cross section of said bed, the distribution and collection device comprising distribution channels (4) and collection channels (8), and each panel being fed by a distribution channel (4), and the withdrawal of the effluents from said panel taking place via a collection channel (8), the distribution channel (4) and the collection channel (8) surrounding each panel having heights that vary linearly over the entire length of the panel, and being such that the inlet velocity in the bed of each portion of fluid remains the same from the inlet section of the panel to its outlet section of the panel, and the sum of the heights of the distribution channel and of the collection channel taken at any point of the length of the panel remains constant.