Which system is critical for preventing the risk of fire during boiler operation?

The flame safeguard system is essential for preventing the risk of fire during boiler operation as it is designed to monitor and control the combustion process. This system ensures that the burner operates safely and efficiently by detecting if the flame is present. If a flame goes out unexpectedly, the flame safeguard system will initiate a shutdown of the burner to prevent the accumulation of unburned fuel, which could lead to a potentially hazardous situation, including the risk of fire or explosion.

In contrast, the safety valve system primarily functions to relieve excess pressure in the boiler, preventing overpressure incidents. While this is crucial for overall safety, it does not directly control fire hazards associated with combustion. The control valve system manages the flow of steam or water within the boiler but does not monitor flame status, and the circulation system ensures proper fluid flow but also does not directly address fire risks. Therefore, the flame safeguard system is vital in maintaining safe combustion processes and protecting against fire hazards in boiler operations.