What is adjusted based on the results of a flue gas analysis?

The air-fuel ratio is adjusted based on the results of a flue gas analysis because this analysis provides critical information about the combustion efficiency and the completeness of the combustion process. Flue gas analysis typically measures concentrations of oxygen, carbon monoxide, carbon dioxide, and unburned hydrocarbons in the exhaust gases.

By evaluating these components, operators can determine if the combustion process is achieving optimal efficiency and whether the mixture of air and fuel is appropriate for achieving complete combustion. If there is an excess of oxygen, it implies that there is too much air in the mixture, indicating that the air-fuel ratio needs to be adjusted to improve fuel efficiency and minimize emissions. Conversely, if there are high levels of carbon monoxide, it can indicate insufficient air, which likewise requires adjustment of the air-fuel ratio to ensure that the combustion process is more efficient and cleaner.

This adjustment is crucial for maximizing thermal efficiency, reducing pollutants, and ensuring safe operation of the steam system.