Patent ID: 8845904
Filing Date: 2014-09-30
Classification: B01J,C02F

Abstract:
1. A method for operating an ion exchange equipment, which comprises a water treating process of passing raw water in a downward flow form through an ion exchange resin bed having a depth D 1 to produce treated water, and a regeneration process of passing a regenerant through the ion exchange resin bed, wherein: the ion exchange resin bed comprises ion exchange resin beads of the same type; the regeneration process to restore the ion exchange resin bed to sufficient capacity using a set amount of regenerant comprises a first regeneration process that utilizes part of the regenerant, and a second regeneration process performed after the end of the first regeneration process that utilizes all remaining regenerant; the first regeneration process is a process of distributing the regenerant to a top of the ion exchange resin bed and simultaneously collecting the regenerant at a bottom of the ion exchange resin bed, thereby generating a downward flow of the regenerant to regenerate the whole of the ion exchange resin bed; and the second regeneration process is a process of distributing the regenerant to the bottom of the ion exchange resin bed and simultaneously collecting the regenerant at a middle of the ion exchange resin bed, thereby generating an upward flow of the regenerant to regenerate a part of the ion exchange resin bed.