Which chemical use in cooling tower

 There are several chemicals used in cooling towers to maintain efficiency, prevent corrosion, and control microbial growth. Here are some common ones:

1. Biocides (e.g., chlorine, bromine, ozone): to control bacteria, algae, and fungi growth.

2. Corrosion inhibitors (e.g., zinc, phosphonates, molybdates): to protect metal components from corrosion.

3. Scale inhibitors (e.g., phosphonates, polymers): to prevent mineral scaling and deposition.

4. pH adjusters (e.g., hydrochloric acid, sodium hydroxide): to maintain optimal pH levels.

5. Dispersants (e.g., polymers): to prevent fouling and maintain water clarity.

6. Algaecides (e.g., copper, silver): to control algae growth.

7. Fungicides (e.g., isothiazolines): to control fungal growth.

Some specific chemicals used in cooling towers include:

- Chlorine dioxide (ClO2)

- Sodium hypochlorite (NaOCl)

- Calcium hypochlorite (Ca(OCl)2)

- Zinc sulfate (ZnSO4)

- Molybdate-based corrosion inhibitors

- Phosphonate-based scale inhibitors

The choice of chemicals depends on factors like cooling tower design, water quality, and local regulations. It's essential to consult with a water treatment expert to determine the best chemical treatment program for your specific cooling tower application.