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Demineralizers

Filtration systems with ion exchange resins for the production of demineralized water, recycling of wash water and selective removal of ions from aqueous solutions.

Demineralizers with ion exchange resins are water treatment systems used to remove ions in order to obtain water with a low salt content. Treatment is ensured by an ion exchange action in the filters containing the exchanging resins.

Demineralizers are used for the production of deionised water with less than 10 µS/cm starting from mains water, or for the closed-loop recycling of wash waters.

To obtain extra-pure water, filters with mixed bed resins capable of producing water with <0.5 µS/cm conductivity, are installed downstream.

Backwashing and regeneration of the filtering masses can be managed semi- or wholly automatically.

SAITA recycling demineralizers are used in the following sectors: surface treatment, galvanization, accessories and valuables, electronics and semi-conductors, industrial coating and washing systems.

The application of recycling demineralizers allows drastically reducing water consumption, improving the washing quality and eliminating spots (e.g. organic, calcareous or siliceous) that can form on the washed pieces. Ion exchange resins are also used in the food and pharmaceutical industries for invert sugar decolourization or the tartaric stabilization of wines and musts.

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CD series // Ion exchange resins demineralizers

Standard demineralizers with three filtration columns, consisting of: recycling pump, activated carbon filter, strong cation resin filter and strong anion resin filter. The CD Series demineralizers are complete with digital conductivity meter to check the quality of the output water, and controlled by hydropneumatic valves to wash and regenerate the ion exchange resins.

CDD series // Ion exchange resins demineralizers

Used to filter mildly acid waters. Resin demineralizers with four filtration columns of twin anion resin columns: strong and weak. The CDD Series demineralizers are complete with digital conductivity meter to check the quality of the output water, and controlled by hydropneumatic valves to wash and regenerate the ion exchange resins.

Duplex series // Automatic double line demineralizers

Demineralizers in a double line (one working and the other one stand-by), used for 24h production lines to guarantee the continuous production or recycling of demineralized water. When the operating line is exhausted, the second line kicks in, allowing the first one to be regenerated without stopping water production.

LM series // Mixed bed resins demineralizers

Demineralizers for the production of demineralized water with < 1 µS/cm with mixed bed of regenerable or non-regenerable resins. Regenerable filters are complete with pneumatic valves and PLC automation to manage the regeneration phases. The filtration columns are made with acid-resistant material for the combined regeneration with caustic soda and hydrochloric acid. Applied to the electronic, photovoltaic or steam-generating industries.

CK series // Decationizers

Decationizers consisting of a quartz sand or activated carbon filter or of a cation resin filter. The CK or QK Series decationizers are complete with a digital pH meter to check the quality of the output water, and controlled by hydropneumatic valves to wash and regenerate the resins. They are used to remove the cations (e.g. rinsing after alkaline degreasing) and continuously recycle process water.

Advantages:

  • Production of demineralized water with low electrical conductivity
  • Treatment and recycling of process waters
  • Duration of the resins exceeding 5 years
  • Selective ion removal

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