Question

why do mixed bed exchanger got exhausted before output between regeneration​

Answer 1

Explanation:

As a result, the bottom layers of the resin bed are more contaminated than the top layers at the end of regeneration, so that when the next loading run begins the leakage is high due to the displacement of the contaminating ions by the H+ (or OH—) ions produced in the exchange.

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Answer 2

why do mixed bed exchanger got exhausted before output between regeneration?

1. Backwash resin bed to separate the cation from the anion resin.
2. Let the resins settle.
3. Optionally: drain the water down to the resin bed surface.
4. Inject caustic soda diluted in demineralised water.
5. Displace the caustic with dilution water.
6. Inject acid diluted in demineralised water.