How The System Operates In Batch Mode - GRUNDFOS ALLDOS Oxiperm C 164 Series Operation And Service Manual

Oxiperm 164 150-2500 g en
5.3.1 How the system operates in
batch mode
15.710010-V5.0
In batch mode, a defined ClO2 solution is added to a holding tank (batch container)
and transported to the connected injection units by means of dosing pumps.
The ClO2 concentration can be adjusted within a range of 0.5 to 3.3 g/l.
Bypass wat er
For a concentration of between 2 and 3.3 g/l, the quantity of bypass water is set via
a dosing ball valve. In the case of concentrations below 2 g/l, the required quantity
of bypass water for a 2 g/l solution is set and the desired concentration inside the
solution container is then achieved by regulating the two dosing pumps.
The limits for the bypass water are -50% and +20% of the setpoint. If the setpoint
is undershot (up to -50%), the system will automatically regulate the dosing flow
of the chemicals pumps for the current water quantity. This is achieved by means
of a pulse pause control on the dosing pumps. When the water quantity setpoint
is undershot, this means that the overall performance of the system is reduced by
up to -50%.
This control makes it possible to compensate pressure fluctuations in the bypass
pipe.
ClO solution
2
ClO
Reactor
H 2 O
HCl
NaClO 2
2
ClO
2
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