Clean Water of All Impurities

Deionization systems come in both separate bed deionization systems and mixed bed deionization systems to provide an option that’s right for you.

Deionization is a process that purifies water by removing mineral salt contaminants. Calcium, copper, iron and sodium ions, as well as anions like bromide and chloride, are removed during the purification process. Deionization is a method that is utilized when cleansed water is required immediately due to the rapid degradation of extremely high water purity.

Deionization systems purify potentially polluted water by exchanging negative and positive molecules in the water with hydrogen (positive) and hydroxyl (negative) molecules in ion exchange resin tanks. Filtration effectively removes organic contaminants, increasing water quality and reducing the formation of scale deposits. The resins attach to any mineral salts in the liquid, separating them from the water and allowing only clean water to leave the tank. As a result, deionized water is one of the most often used solutions in factories and manufacturing businesses.

Deionization tanks give varying levels of purification depending on the resin and deionization technique employed, so choosing the proper one for each application is crucial.

Separate-Bed Deionization Systems

This system utilizes Cation and Anion resins in separate columns. This allows the resin to be more easily regenerated. The resins must be kept separate because the regenerant for one will completely load the other. For instance, the cation resin must be regenerated with a strong acid. Strong acid would completely load up every site in the anion resin, leaving no sites for ion exchange with the ions we need to remove. After regeneration the resin can pull impurites from water, leaving you with a very pure water.

Mixed-Bed Deionization Systems

Although using separate anion and cation resin beds will produce fairly pure water, there are some leftover products of the two exchange processes that still contaminate the water. Water can be made even purer by mixing the two different resins together. The resins must still be separated for the regeneration process, however. This is done by using resins with two different densities and then using a controlled flow of water to float the lighter resin to the top. A mixed Bed DI system can produce water approximately one order of magnitude purer than Two Bed DI systems.