| 摘要 |
The invention provides an improved method and apparatus for upflow regeneration of ion exchange resins in a regeneration zone having a regenerant inlet and a rinse water inlet below the regenerant inlet. The carrying out the method, the introduction of regenerant and rinse water into the zone is terminated, and resin is moved downwardly within the zone while exhausted resin is introduced at the top. The introduction of regenerant and rinse water is then resumed. In accordance with the invention, the introduction of regenerant and rinse water is terminated and/or resumed at predetermined time intervals with respect to one another. The time interval is regulated to ensure that there is no substantial amount of entrained regenerant below the regenerant introduction point at the time that delivery of regenerant is resumed. The absence of entrained regenerant below the regenerant introduction point ensures that none of the resin will receive an excessive dose of regenerant when regenerant introduction is resumed.
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