Why is water treated before being used in boilers?

Water treatment before it is used in boilers is essential primarily to prevent corrosion, scaling, and other water-related issues. When water contains impurities such as minerals, sediments, or dissolved gases, these can lead to various problems once the water is heated and turned into steam.

Corrosion can occur when certain minerals or gases, like oxygen and carbon dioxide, react with the metal components of the boiler, leading to weakened structures and potential failures. Scaling happens when minerals like calcium and magnesium precipitate out of the water and adhere to boiler surfaces, reducing heat transfer efficiency and increasing the risk of overheating and damaging the boiler.

Moreover, untreated water may contain biological contaminants, which can lead to microbiological corrosion and fouling in systems, further complicating operations and maintenance.

Therefore, the treatment process aims to address these issues by removing harmful substances and ensuring the water is chemically balanced and suitable for safe boiler operation, ultimately leading to more reliable performance and a longer lifespan for the equipment.