Grunbeck desaliQ:MA, Operation Manual

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Product description
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3.4 Functional description
3.4.1 Physical
Via an interior distribution system, 2 (desaliQ:MA9) or 4 (desaliQ:MA13) resin bags filled with
mixed-bed resin are steadily flown through from bottom to top.
The fully demineralised water, the so-called demi water, is directed to the tank outlet via the
collection element located at the tank lid.
3.4.2 Chemical
The mixed-bed resins consist to one part of a highly acid cation exchanger resin and to the
other part of a highly alkaline anion exchanger resin. In the mixed-bed cartridges, the two
components are completely mixed.
The cation exchanger resin removes all positively charged ions, the so-called cations, from
the raw water. All cations contained in the raw water such as calcium, magnesium or sodium
are exchanged for H
+
ions.
The anion exchanger resin is used in full demineralisation to filter off negatively charged
ions, the so-called anions. All anions such as nitrate, phosphate, sulphate, chloride and
hydrogen carbonate contained in the raw water are exchanged for OH
- ions.
Full demineralisation removes almost all undesired components from the inlet water. Thanks
to the highly alkaline anion exchanger resin, silicic acid and carbon dioxide are also filtered
off. The H
+
and OH
-
ions generated during the exchange process combine to H
2
O. The result
of the full demineralisation principle is pure water.
3.4.3 Demineralisation of raw water
The main application of the desaliQ mixed-bed cartridge is the full demineralisation of raw
water for easy and quick filling and make-up water feed of heating systems. The raw water is
directed to the inlet of the mixed-bed cartridge via an optional system separator and a fine
filter.