What is the main purpose of using sodium sulfite in boiler systems?

The main purpose of using sodium sulfite in boiler systems is to eliminate oxygen from the water. Oxygen can be highly corrosive in boiler systems, leading to pitting and rust formation, which can significantly damage the boiler over time. Sodium sulfite acts as an oxygen scavenger, chemically reacting with free oxygen present in the water, thus preventing corrosion and prolonging the life of the boiler equipment.

This reaction helps to maintain the integrity of the boiler system, ensuring it operates efficiently and safely. By reducing oxygen levels, sodium sulfite effectively protects the boiler's metal components, ultimately helping to maintain system efficiency and reliability over time.