What does forced draft in boiler systems involve?

Forced draft in boiler systems involves using a mechanical fan to supply air to the burner. This method enhances combustion efficiency by actively directing and controlling the flow of air into the combustion chamber, ensuring that the burner receives the optimal amount of air required for efficient fuel combustion. This is particularly important in large industrial applications where proper air-fuel mixing is crucial for achieving desired performance and emissions standards.

By utilizing a mechanical fan, forced draft systems can maintain consistent air supply under varying operational conditions, which cannot be achieved by relying solely on natural draft methods, where air flows into the burner due to buoyancy and pressure differentials. This mechanical assistance allows for better control over combustion processes and can lead to improved overall energy efficiency and reduced emissions.