What is the purpose of Sodium Sulphite in boiler systems?

• A. To enhance flame quality
• B. To prevent water overflow
• C. To treat boiler water
• D. To lower steam pressure

Answer: (C)

Sodium sulphite is used in boiler systems primarily for treating boiler water. It serves as an oxygen scavenger, which is essential in preventing corrosion within the boiler and associated piping systems. When oxygen is present in the boiler water, it can lead to significant corrosion of the metal surfaces over time. By adding sodium sulphite, any dissolved oxygen is effectively eliminated, thereby protecting the integrity of the boiler and extending its operational lifespan.

Additionally, sodium sulphite helps maintain proper water chemistry, which is crucial for efficient steam production and overall system performance. Managing the chemical composition of boiler water ensures that the formation of scale and other deposits is minimized, leading to better efficiency and reduced maintenance needs.

The other options are not related to the primary function of sodium sulphite in boiler systems. For instance, enhancing flame quality or lowering steam pressure does not encompass the chemical treatment purpose. Similarly, while what prevents water overflow is important, it is not directly related to the role of sodium sulphite specifically. Thus, the correct identification of sodium sulphite's role in treating boiler water highlights its importance in maintaining a safe and effective boiler operation.