Rational SCC CM, Руководство по обучению

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- 25 - V03 EN, Fundamentals
Water Info
Because of continuous examinations of systems for water treatment we would like to offer you a few
information on some different systems.
The given statements are only related to Rational units.
If you already have made experiences with systems for water treatment, we would be very thankful if
you could send us a short fax about your experiences.
1. Recommended systems for water treatment:
A)
With pure scale problems in the steam generator we recommend hydrogen-(H+)-Ionic ex-
changer. These type of filters will extend the intervals of descaling to
approx. 5 to 8-times of the normal descaling intervals. But even with this type of filters it is still
necessary to descale the steam generator.
B) With a high chloride – content above 80mg/l of water, it is possible, that the interior cabinet
starts to corrode. To remedy this problem it is necessary to install a reverse - osmosis – filter.
C) With chlorine-contents above 0,2 mg/l of water an active carbon filter should be installed, to
avoid corrosive radicals when chlorine is heated up.
D) If the water is soiled with sand, iron particles or suspended matters a particle filter with
5-15 μm is recommended.
2. Limited recommended systems for water treatment .
Physical systems for water treatment:
On some sites this type of water treatment (is directly installed in the water supply of the unit)
showed satisfactory results. On other sites there was no positive effect visible with this type of
system. Because of these circumstances we can not make a final assessment of this system.
3. Not recommended systems for water treatment.
A) Sodium-Ionic exchanger:
With this filter system calcium is replaced by sodium. On chlorine contents of the water above
50mg/l, sodium reacts with chlorine to NaCl (=salt). This increase of salt in the water results in
a delay in boiling of the water. This delay in boiling can cause
”spitting” steam generators.
B) Silicate-dosing systems:
This kind of systems are problematic, as the adding of non conductive silicates, will influence
the water level measurement.
Rational recommends Water treatment filters systems of BRITA company.