Keyword: «spent regeneration solution»

This article presents a classification of methods for restoring spent regeneration solutions of sodium cation filters. A diagram of a modified filter cleaning technology is presented. Schematics and descriptions of chemical and combined restoration technologies are provided. Chemical reactions occurring in equipment used for lime-soda and lime-sulfate softening are presented. A description of the thermoreagent method is provided, along with a flow chart. The advantages and disadvantages of the restoration methods considered are indicated.