Cooling Water Treatment
Cooling towers for circuits of cooling water are used in a range of industries throughout the world. In cases where it is impossible to use fresh water for cooling, circuits for cooling water are used. Cooling water consumption must be minimised and the entire system must be protected from corrosion, sediment and the growth of biological organisms by cooling water treatment. Prevention of negative environmental effects and the formation of legionella are prime concerns.
In circulatory cooling systems, losses of cooling water occur through evaporation and leakage. To compensate for the resulting increase in salt concentration, blowdown takes place, initiated by measurement of electrolytic conductivity. This avoids scaling and corrosion. The additional cooling water also undergoes a chemical treatment.
Requirements for cooling towers
Two main requirements are given to operate cooling towers as efficiently as possible:
- Reduction of cooling water consumption
- Protection of entire plant against corrosion, sediments and biologic growth
These two requirements are, however, contradictory. Fresh water consumption in the cooling tower can be avoided by increasing the thixotropy in the circuit water with a desalination control device. However, the number of water contents increases so that the components of the cooling tower, the chiller and the tubings are strongly affected.
Solutions made by ProMinent
The protection of the cooling tower plant can be ensured by cooling water treatment using dosing of inhibitors and biocides as well as the use of filters.
Disinfection
- Dosing systems for metering of sodium-calcium hypochlorite or bromide products
- Use of ozone plants for cooling water treatment
- Use of chlorine dioxide plants for cooling water treatment
- Measurement and control technology for variable-dependent dosing of biocides
Dispersion
- Dosing systems for dosing of dispersant chemicals
Corrosion protection
- Dosing systems for metering of corrosion protection products and hardness stabilisers
- Dosing systems for dosing of dispersant chemicals
Blowdown control
- Specially adapted units for measurement and control of blowdown
- pH value correction using custom measurement and control technology
Filtration
- Gravity filters for filtration of cooling water in open cooling circuits
Complete cooling water treatment in a walk-in container
Dosing, measuring and controlling, disinfection of cooling water with chlorindioxide for operation in a walk-in container. The complete cooling water treatment is ready mounted, including heating and air-conditioning.
