Adsorber with at least one adsorption bed containing granular adsorbant, where the grain size at the edge of the bed is smaller than the rest of the granules to avoid edge effects

摘要

The adsorption bed (2, 3) has around its edge relative to the general direction of fluid circulation, granules (2B, 3B) with a smaller grain size than those (2A, 3A) in the rest of the adsorption bed Adsorption device for adsorbing at least one components of a fluid entering a box (1) of apparatus via a fluid inlet (11). This box contains at least one adsorption bed (2, 3) made of adsorbant material(s) in the form of granules placed so they can be penetrated by the fluid and so the fluid flows in the adsorption bed overall through the thickness of the bed. At least one adsorption bed contains a single material in granules of different grain size, or it can contain two materials of different grain size and nature. Alternatively, the adsorber contains at least two adsorption beds for adsorbing different components. The ratio (dg(B)/dg(A)) of the diameter of the smaller granules to the normal granules is at most equal to the ratio (Cap(B)/Cap(A))<2> of the squares of the respiration capacities of the two parts of the bed.