What is the function of a forced draft fan in steam generating plants?

The function of a forced draft fan in steam generating plants is primarily to blow air into the firebox. This is essential for the combustion process, as it provides the necessary oxygen to support the burning of fuel, which generates heat. The forced draft fan increases the air pressure, ensuring that an adequate amount of air is supplied to the firebox, which helps maintain a stable and efficient combustion process.

By pushing air directly into the combustion area, the fan contributes to better fuel efficiency and reduced emissions, leading to a more environmentally friendly operation of the steam generating plant. This air supply is crucial not only for ignition but also for sustaining the combustion once it has started, making it vital for effective steam generation.