Full demineralization with ion exchange resins; for boilers and processes that require high purity.
Demineralization works by retaining the cations (calcium, magnesium, sodium) and anions (chloride, sulfate, bicarbonate, silica) in the water on ion exchange resins. A unit in which cation and anion resins share the same column is called a mixed bed.
After a while the resin reaches saturation and can no longer produce water of the required quality. At that point it is regenerated with acid and caustic and made usable again.
Positively charged ions exchange with the H⁺ on the resin.
Negatively charged ions exchange with the OH⁻ on the resin.
The mixed bed takes up the remaining ions and brings the outlet water to its final quality.
The exhausted resin is renewed with acid and caustic; the system returns to service.
Conductivity and silica control on high-pressure boilers.
Demineralised water for laboratories and sensitive production lines.
Removal of the ions remaining at the RO outlet.
Silica removal in the anion stage.
Looking only at equipment cost when choosing a mixed bed is misleading. Acid and caustic storage, safe dosing and the discharge of regeneration waste are continuing items for the plant.
That is why, in high-flow plants, the configuration in which reverse osmosis and a mixed bed work together — with the mixed bed acting only as a polishing stage — is often more economical. We compare which configuration fits in our efficiency calculations.
If outlet quality no longer holds despite regeneration and the cycle length has shortened noticeably, the resin is replaced.
A mixed bed requires chemical regeneration; EDI runs continuously on electricity and needs no regeneration chemicals.
Yes, we work brand-independently; resin replacement and the commissioning that follows are on us.
High-recovery industrial reverse osmosis units for process and boiler feedwater.
View →Resin softeners for hardness removal; resin replacement and regeneration tuning.
View →Complete system delivery with filter face piping, control panel and field installation.
View →Let us size the system together; we will survey the site in person if needed.
