Demineralisation by resin exchange

When the process requires reduced levels of salts in the industrial water supply it is advisable to further purify the feed water. Apart from a demineralisation by reverse reverse osmosis, another solution is a demineralisation by resin exchange: ?HRW process?. While being based on the process of counter-current regeneration, BABCOCK WANSON has developed the "HRW" process which removes salts (and silica) by the provision of cationic and anionic resins (primary chain) and/or from mixed beds (final polishing). The counter-current regeneration process presents many advantages in term of regenerating reagents consumption and quality of water produced :

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