New York Low Pressure Boiler COF Practice

What is the role of a Deaerator in a boiler system?

1. To cool the steam

2. To remove dissolved gases from water

3. To regulate boiler pressure

4. To monitor fuel consumption

The correct answer is: To remove dissolved gases from water

The role of a Deaerator in a boiler system is to remove dissolved gases, particularly oxygen and carbon dioxide, from the boiler feedwater. This process is crucial for preventing corrosion in the boiler and pipework, enhancing the longevity and efficiency of the system. When water contains these dissolved gases, they can lead to significant damage to the boiler by promoting corrosion, which ultimately shortens equipment life and can lead to costly repairs. The Deaerator works by heating the water and reducing its pressure, which facilitates the release of dissolved gases. As the water is agitated in the Deaerator, the gases are expelled, often directed out to a vent, allowing for the incoming feedwater to be much cleaner and safer for the boiler system. In contrast, other roles mentioned do not correctly align with the primary function of a Deaerator. For instance, cooling steam, regulating pressure, and monitoring fuel consumption pertain to different systems or components in a boiler operation, highlighting the specific necessity of the Deaerator in maintaining healthy boiler water chemistry.