| 摘要 |
After separation of anion- and cation-exchange resins by elution, the mixed interfacial zone, contg. particles of both resins, is taken off and not contacted with regenerant solutions. Mixed resin from the treatment vessel, when exhausted at the end of an operating cycle, is transferred to a regeneration tank in which, by upward flow of treated liquid, the light and heavy resin components are sepd. into two layers. The upper, lighter anion resin is displaced into a regeneration tank for brine regeneration. The mixed fraction is taken off into a holding tank whilst the remaining cation resin receives acid treatment. Used for the cyclic regeneration of mixed ion-exchange resin beds in which the exhausted resin mixt. is removed from the treatment vessel. Higher treatment efficiency and better liquid quality is obtd. because of lessened ion take-up by the mixed fraction of resin during regeneration. |
