What is the function of combustion controls on a boiler?

The function of combustion controls on a boiler primarily revolves around maintaining the appropriate air-fuel ratio. This is critical for efficient combustion, maximizing fuel utilization, and minimizing harmful emissions. An optimal air-fuel ratio ensures that the fuel burns completely, which improves the overall energy efficiency of the boiler and reduces the release of pollutants into the environment.

The air-fuel ratio must be carefully managed to prevent situations like incomplete combustion, which can lead to the production of carbon monoxide and other unburned hydrocarbons. Additionally, achieving the correct ratio helps prevent operational issues such as flame instability or overheating, which could negatively impact the boiler's performance or safety.

While monitoring water levels and regulating steam pressure are essential functions within a boiler system, they are not specifically related to the combustion process itself. Deactivating safety valves is also not a function of combustion controls, as safety valves are designed to operate independently to protect the boiler from unsafe pressure conditions. Thus, the focus of combustion controls is rightly placed on optimizing the mixture of air and fuel for effective and safe operation.