What Are The Six (6) Steps in Regenerating A Bed Of Anion Or Cation Resin?

Here are a few tips and tricks to consider applying during the mixed bed regeneration process:
1. Extend the backwash
The backwash of a mixed-bed demineralizer will separate the cation and anion resin beads. A good separation is crucial to
ensuring that the right beads get soaked in either caustic or acid.
2. Drain down the waste tank (if you have one)
Right after the backwash is done, pause the regeneration and neutralize and drain the waste tank. The waste tank is where
the backwash effluent drains to so it can be treated prior to being released into the environment.
3. Extend the preheat wash down
The preheat step of a mixed-bed demineralizer regeneration is to prepare the anion beads for the 4%-caustic injection step.
Soaking the anion beads in hot water will flush the impurities captured from water entering the unit during service. The hot
water will also warm up the caustic supply pipes, making it easier for the caustic to flow during the regeneration. For these
two reasons, it is best to extend the preheat step for a bit longer. The amount of time really depends on experimentation and
what your operating procedures call for.
5. Watch everything like a hawk during the chemical injection step
A good operator will keep a close eye on everything during the chemical injection steps during a regeneration. Some process
systems regenerate each of the resins individually or both at the same time. If dilution water flows were not checked during
the preheat step, and they are off, things will get ugly really fast. Keep an eye on chemical concentrations and address any
issues promptly.
6. Extend the final chemical displacement step
Thisisa personal choice but may help with cnductvty isues later on during the insedown steps. If there is hot water to be
spared, kep this step rnning for as long as you can to rellyl remove any chemical rsiduals that are left over from
regenerating the resin beads.
Above are six tips that might be helpful for you during mixed bed regeneration process.