Hi-tower separation method is employed in-external regeneration system when the amount of cross-contamination ( i.e., cation resin exposed to caustic and anion resin exposed to acid during regeneration)must be kept to minimum. This improves the quality of treated condensate. With the high vessel separation system, cross-contamination is less than 0.1 %. This low cross-contamination percentage produces very low ion leakage from the resin and high quality polished condensate.

Hi-tower regeneration system combines resin separation tower (SPT), cation resin regeneration and storage tower (CRT), anion resin regeneration tower (ART) and auxiliary equipment such as flush pump, roots blower, acid (alkali) storage and dosing equipment etc.