Size the exhaust fan to generate the essential air flow, maintaining the desired capture velocity at the particle source and overcoming system resistance.
The selection of a particular fan type in baghouse fan design depends on several factors, including the properties of the polluted gas, the necessary pressure levels, the volume of gas stream, and various other specifications Below are the main types of fans:
- Centrifugal fans (Centrifugal blowers):
These fans use rotation to transfer kinetic energy to the current, increasing its speed, which is then converted into pressure. They are ideal for handling large volumes of the stream at high static pressures.
Depending on the application, various configurations of centrifugal fans can be chosen, such as radial, forward-curved (with blades tilted forward), or backward-curved (with blades tilted backward).
Axial fans are suitable for handling large volumes of flow at relatively low pressure. They operate by propelling the stream along the axis of the fan.
They are often used when a substantial air volume is needed without high pressure, although they are not always the optimal choice for configurations with demanding static pressure criteria.
The choice between these types of fans and their configurations depends on the particular demands of your aspiration setup and application. Centrifugal fans are most often used due to their ability to handle various loads and gas treatment conditions, as well as the ability to overcome high static pressures.