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Cooling Water Treatment (CW)

Building air-conditioning cooling water treatment

Chlorine dioxide is often the most effective and economical way to control microorganism buildup in cooling water systems.


Central air-conditioning circulating cooling water system mainly includes two water loops: cooling water system and chilled water system. The cooling water system is an open cycle system, and the chilled water system is usually a closed cycle system.Both use water as the working medium.

For cooling water system, in addition to scale, the harm of microorganisms is also very prominent. It is necessary to use disinfectants to sterilize microorganisms and remove algae. Among them, chlorine dioxide (ClO2) is the most ideal disinfectant, which has the characteristics of broad spectrum, high-efficiency, non-toxic, small dosage, and long-term efficacy. However, the activated ClO2 is extremely unstable, and the best solution is to use a ClO2 generator for on-site generating and dosing.
The ClO2 generator generating and dosing process system is arranged like the schematic below:

Equipment selection

Dosing method: adopt impact periodic dosage, 1-3 times per day
Amount of residual chlorine dioxide: 0.5 - 1.0mg/L, the equipment selection is based on the circulating water volume, and the dosage is 2mg/L. It is advisable to use a fully automatic chlorine dioxide generator with a residual chlorine detector. When the residual chlorine drops to 0.5mg/L, it will automatically start, and when the residual chlorine rises to 1.0mg/L, it will automatically stop.
Every cooling system is different. For help with Chlorine dioxide use in cooling systems contact us.
Our main products are 2-chemical and 3-chemical chlorine dioxide generators; gas chlorine dioxide NOX destruction systems; electrolytic sodium hypochlorite generators, and chemical dosing skids.




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