The following are the general steps involved in the DM process:
The first step in the DM process is pretreatment, which involves the removal of suspended solids and organic matter from the water using filtration, sedimentation, or other methods.
The next step is cation exchange, where the water passes through a bed of cation exchange resin that removes positively charged ions.
The water then passes through a bed of anion exchange resin that removes negatively charged ions.
To further purify the water, it may pass through a mixed bed of cation and anion exchange resins that remove any remaining impurities.
The ion exchange resins need to be regenerated periodically to maintain their effectiveness. Regeneration involves washing the resins with a solution that restores their ion exchange capacity.
After the DM process is complete, the water may undergo post-treatment, such as pH adjustment, disinfection, or polishing, to further improve its quality.
Overall, a DM plant is an effective way to produce high-quality demineralized water for various industrial and commercial applications. The process requires careful monitoring and maintenance to ensure that the plant operates efficiently and effectively.