What is the purpose of a flame scanner in a boiler?

The purpose of a flame scanner in a boiler is to monitor combustion. A flame scanner is a critical safety device utilized in combustion systems to detect the presence of a flame. This monitoring is essential for ensuring that the combustion process is stable and functioning correctly. If the flame goes out or fails to ignite properly, the flame scanner provides immediate feedback to the control system, which can then take necessary actions to prevent hazardous situations, such as unburned fuel buildup.

In addition to safety, the flame scanner helps optimize combustion efficiency by confirming that the combustion process is occurring effectively. This not only enhances performance but also minimizes emissions, supporting environmental compliance. Proper monitoring of flame characteristics allows operators to maintain the desired combustion conditions by adjusting air-fuel ratios as needed.

The other options, while related to various functions within boiler operations, do not accurately reflect the specific role of a flame scanner in monitoring and ensuring safe combustion.