What is the primary purpose of a fan belt in an overfire air fan system?

The primary purpose of a fan belt in an overfire air fan system is to control fan speed. The fan belt connects the motor to the fan and allows for the transfer of rotational energy. By adjusting the tension or size of the belt, operators can modify the speed at which the fan operates. This is important in an overfire air system, as the fan speed needs to be regulated to ensure proper airflow and combustion control within the system.

Controlling fan speed directly affects the performance and efficiency of the overall system. If the fan operates at the correct speed, it ensures optimal air distribution, which can lead to improved combustion efficiency and reduced emissions.

While airflow adjustment, energy consumption reduction, and maintaining fan stability are important considerations in fan system design, they are secondary functions that depend on how well the fan speed is controlled through the fan belt.