Centrifugal fans are usually driven by electric motors, and generate air flow through rotating impellers, which has the characteristics of large flow and high air pressure, and is an important part of boilers and industrial production.
Boiler centrifugal fan mainly has the following functions in the boiler system:
1.Air supply: The main function of the centrifugal fan is to deliver enough air to the boiler combustion chamber to provide the necessary oxygen for fuel combustion. This wind is called a primary wind.
2.Combustion: During the combustion process of the boiler, ensuring that the air and fuel are well mixed can help to achieve a more complete combustion, which improves thermal efficiency and reduces pollutant emissions.
3.Regulate combustion: control the amount of air fed into the combustion chamber by changing the speed of the fan or adjusting other means, so as to adjust the combustion condition of the boiler to meet different load requirements.
4.Maintain pressure: During the combustion process of the boiler, a certain furnace pressure needs to be maintained, and the centrifugal fan can help maintain this pressure to ensure the safe and stable operation of the boiler.
5.Air for ash evacuation: In some boilers with dust removal devices, centrifugal fans can also provide the air flow required for processes such as cleaning fly ash.
6.Smoke exhaust: In addition to supplying air to the boiler, a separate centrifugal fan (called an induced draft fan) is required to discharge the flue gas generated by combustion to ensure the efficient operation of the boiler.
7.Buffer thermal stress: Through the uniform wind speed and pressure, the centrifugal fan also helps to distribute the thermal stress inside the boiler and avoid equipment damage caused by excessive local temperature difference.