What is the primary function of ammonia in boiler water treatment?

The primary function of ammonia in boiler water treatment is indeed to neutralize carbon dioxide (CO₂) in the condensate. When water from the steam system returns to the boiler, it often contains dissolved gases from the steam, including CO₂. This gas can form carbonic acid when it dissolves in water, which can contribute to corrosion in the condensate and boiler system.

Ammonia acts as a neutralizing agent, reacting with the carbonic acid to help maintain a more neutral pH in the water, thus reducing the risk of corrosion and protecting the integrity of the boiler system. By converting the acidic condition to a more neutral one, ammonia plays a crucial role in maintaining the health and efficiency of the entire steam system.

Understanding this function of ammonia emphasizes the importance of water chemistry in power engineering, especially when it comes to condensing equipment and overall boiler operation.