Application Examples; Functional Principle; Operation Modes - Grundfos Oxiperm Pro OCD-162 Instrucciones De Instalación Y Programación

4.1 Application examples

Oxiperm Pro OCD-162 disinfection systems can be used for
different types of applications:
4.1.1 Disinfection of potable water lines
• The flow rate in drinking water lines can fluctuate greatly
(peak times when water is used for bathing and cooking).
• The type and level of contamination in the water
(disturbance variables) are not known or greatly vary.
• Examples: potable water lines in:
– hotels, multi-floor buildings
– schools, hospitals, convalescent homes
– showers, health spas
– food and beverage plants
– waterworks.
4.1.2 Disinfection of industrial systems
• The water quantity in industrial systems is relatively constant.
• The type and level of contamination in the water
(disturbance variables) are generally measured.
• Examples:
– bottle washing, breweries
– industrial process water or wastewater systems
– cooling water systems.
4.1.3 Shock disinfection (with external batch tank)
• Applications requiring large quantities of disinfectant in a short
time
• Example: pools and spas.

4.2 Functional principle

4.2.1 Production of chlorine dioxide
Chlorine dioxide is prepared in the reaction tank as follows:
Water, hydrochloric acid and sodium chlorite are added until a
specific level is reached. During the reaction time, a diluted
chlorine dioxide solution is produced. The reaction tank is filled
with water. With a concentration of approximately 2000 ppm, the
final solution flows through a pipe (overflow) located in the middle
of the reaction tank into the batch tank below.
From the batch tank, the dosing pump feeds the final chlorine
dioxide solution to the injection unit, where it is injected into the
main water line to be disinfected.
See section

4.7 Operation modes

for operating mode information.
4.2.2 Flow-rate-proportional dosing
1. The controller is set to "proportional controller".
2. A contact water meter or flow meter measures the water flow
rate in the main water line, and continuously sends measured
values to the controller.
3. The proportional controller calculates the required chlorine
dioxide feed rate in proportion to the water flow rate in the
main line.
4. The proportional controller sends the corresponding output
signals to the dosing pump.
5. The dosing pump feeds the required quantity of chlorine
dioxide solution from the batch tank into the main water line.
6. An optional measuring cell monitors the chlorine dioxide
concentration in the main line.
4.2.3 Setpoint-controlled dosing
1. The controller is set to "setpoint controller". A setpoint for the
desired chlorine dioxide concentration in the main line is
specified.
2. A measuring cell monitors the chlorine dioxide concentration
in the main line, and sends actual values to the controller.
3. The setpoint controller compares the incoming actual values
with the setpoint. Based on the deviation, it calculates the
quantity of chlorine dioxide solution (actuating variable)
required to achieve the desired concentration.
4. The setpoint controller sends output signals to the dosing
pump.
5. The dosing pump feeds the corresponding quantity of chlorine
dioxide solution from the batch tank into the main water line.
A combined controller is also available for applications with
setpoint controller and flow meter, see separate Service
Instructions.
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