For efficient boiler fuel operation, what conditions should be maintained?

• A. High CO2, low CO, low stack gas temperature
• B. Low CO2, high CO, high stack gas temperature
• C. Medium CO2, medium CO, low stack gas temperature
• D. High CO2, low CO, high stack gas temperature

Answer: (A)

Maintaining high CO2 levels, low carbon monoxide (CO), and low stack gas temperature is crucial for efficient boiler fuel operation. High CO2 indicates that the combustion process is complete, meaning that fuel is being burned efficiently and producing optimal energy output. Low CO levels signify that there is minimal incomplete combustion, which is essential for reducing harmful emissions and ensuring that the fuel is being utilized effectively.

In addition, low stack gas temperature is important as it implies that heat is being transferred effectively from the combustion gases to the water or steam in the boiler. High stack temperatures can indicate wasted energy, as it suggests that heat is escaping rather than being used for the intended heating purpose. Therefore, the combination of high CO2, low CO, and low stack gas temperature collectively signifies a well-tuned combustion process, optimizing energy efficiency and reducing environmental impact.