Chiller Chemical dosing system water treatment! By Imran

Chemical treatment (or dosing):

Proprietary (like NALCOOL) or generic chemicals (like Sodium Silicate, Sodium Nitrite, and Sodium Sulfite) compositions are used to prevent the chiller system from corrosion, scaling, fouling and microbiological growth. How? Mainly in three ways: first, these chemicals react with the pipes to form a protective thin inside layer; second, the chemicals help in maintaining the pH level; and third, the chemicals remove corrosive dissolved oxygen in the water. Dosing pumps are used for applying the predetermined quantities of chemicals at regular intervals. Mechanical Treatment: Before commissioning, the whole system should be cleaned and flushed using treated water and commission it as soon as possible. Attend all the leaking points regularly. Filtration: The filter is used for removing (or at least reducing) the solid particles (like welding flush, concrete particles, etc.). UV and Ozone treatment: This method is effective for preventing the microbiological growth in the system, but is not used widely for chillers unless there is some restriction for chemical treatment. Unlike chemical dosing, this treatment does not generate harmful chemical by-products. Thanks for read if you want to anything related to HVAC and Mechanical Engineering then comments and subscribe for new update.