Plant and process for liquid treatment, in particular for the demineralisation of water, with periodic countercurrent regeneration

摘要

The plant is characterised in that it comprises a treatment vessel 10, a bed expansion vessel 20 mounted axially above the said treatment vessel 10, with interposition of an isolating device 28, and means ensuring the periodic circulation of the liquid to be treated, of the regenerating solution and of a rinsing liquid.