New York Low Pressure Boiler COF Practice

What is the primary purpose of oxygen scavenging in a boiler system?

1. Increase pressure

2. Prevent corrosion

3. Improve efficiency

4. Reduce water consumption

The correct answer is: Prevent corrosion

The primary purpose of oxygen scavenging in a boiler system is to prevent corrosion. In a boiler system, water is heated to generate steam, and the presence of dissolved oxygen in the water can lead to significant corrosion of the boiler’s metal components. This corrosion can compromise the integrity of the boiler, leading to leaks, breakdowns, and ultimately, costly repairs or replacements. Oxygen scavengers are chemicals that are added to the boiler water to chemically react with and remove dissolved oxygen, thus minimizing its availability to facilitate corrosion processes. Common oxygen scavengers include sodium sulfite and hydrazine, which effectively convert dissolved oxygen into harmless compounds. By effectively reducing oxygen levels, these chemicals help protect the boiler and associated systems, ensuring their longevity and operational reliability. The other options do not directly address the main function of oxygen scavenging. While reducing water consumption and improving efficiency may be beneficial outcomes in the broader context of boiler operation, they are not the primary aim of utilizing oxygen scavengers. Increasing pressure is also not relevant to the function of oxygen scavengers, as they do not influence operational pressure directly.