Patent ID: 6187826
Filing Date: 2001-02-13
Classification: B01J

Abstract:
A device for the regeneration of mixed beds of ion exchange resins, including cation exchange resins and anion exchange resins, contained in a first treatment column (C1) the device comprising:means for the separation of the anion exchange resins from the cation exchange resins in said first column (C1) by fluidizing the mixed bed of resins which allows water to enter first column (C1) from the bottom, so that the lighter anion resins shift themselves on top of the cation resins;means for the transfer of the anion exchange resins into a second treatment column (C2) which column is in fluid communication with the first column (C1) by a conduit including a transfer opening (A) in the first column (C1), at a level above that of the mixed bed, a conduit connecting said opening (A) to the second column (C2), intercepted by a valve (V2), and further comprising means for expanding the cationic resin in the first column (C1) up to a level just below said opening (A);means for the regeneration of the cation exchange resins directly in the first column (C1);means for the regeneration of the anion exchange resins in the second column (C2) transferring the regenerated anionic resins from the second column (C2) to the first column (C1) and preparing a homogeneous reconstitution of the mixed resins and fluidizing the bed by pumping water into the second column (C2);said regeneration means consisting of an acid solution fed through a valve (V4), and the exhausted solution after regeneration is discharged through a valve (V5) the second consisting of an alkaline solution fed through a valve (V6), and the exhausted solution after regeneration is discharged through a valve (V7);means for the transfer of the regenerated anionic resins from the second column (C2) to the first column (C1) comprising a conduit intercepted by a valve (V3), which joins said columns in the region of their respective bases and water pumped in the second column (C2) which transfers the bed of anionic resins into the second column (C1) where it rises through the fluidized bed of the cationic resins mixing itself intimately with them.