Eliminate the "clumping" phenomenon of ion exchange resin

Water Softener Resin "clumping" phenomenon

The "clumping" phenomenon of Resin refers to the phenomenon that Ion Exchange Resin are not easy to stratify due to electrostatic attraction between Cation exchange resin and anion exchange resin in the mix bed.

Broken resin powder and some suspended matter will increase the "clumping" effect of the resin.

If any electrolyte (such as caustic) is added to the "clumping" resin, the negatively charged cation resin will combine with cations to show charge neutrality; the positively charged anion resin will combine with anions to show charge neutrality, " The yang and yin resins of "holding together" will be scattered. Therefore, before delamination, a small amount of alkali is passed into the resin in the bed, which can eliminate the "clustering" of the resin and improve the delamination effect.

The specific method can refer to the following:

After the backwash is completed, wait for the Mix Bed Resin to fall off the bed, and keep a 200-300mm thick water layer on the top of the resin layer. Open the alkali hydraulic ejector to inject a small amount (eg 0.2m3) of alkali into the mixed bed.
As we all know, whether the cathodic and cathodic resins are clearly delaminated is also related to the degree of failure of the resins. Let the alkali solution pass through the resin layer from top to bottom to convert the anion resin into the OH type as much as possible; converting the cation resin into the Na type can also increase the density difference between the cation and anion resins in different ionic types, thereby strengthening the stratification Effect.
After alkali injection, close the positive washing drain valve and let it stand for 10 minutes to make the reaction time of alkali injection more sufficient.
After standing still, start layering operation. When layering, it should be seen from the monitoring mirror that the resin is disturbed up and down under the impact of hydraulic force. When there is no foam in the layered drainage, close the backwash inlet valve. After the resin stabilizes, there will be a clear dividing line between the positive and negative resin layers, indicating that the layering effect is ideal.