The primary function of centrifugal fan in a boiler is the suction or creating negative pressure to dispense the flue gases or air from the system.
Induced Draft Fans or ID Fans removes flue gases from the combustion chambers and creates a vacuum of negative air pressure with a blower to suck the air out of the combustion chamber. These air or flue gases are discharged from the boiler through a stack or chimney.
1. All centrifugal fan parts in explosion-proof centrifugal fans that are in contact with gas must be made of non-ferrous materials (the most common ones are aluminum impellers, which are less likely to cause sparks).
2. In order to prevent the friction between the centrifugal fan impeller and the air inlet to generate sparks and cause fire and other hazards. Explosion-proof centrifugal fans use throat explosion-proof. Generally, an aluminum ring or copper ring is inlaid at the air inlet of the fan (note that the selection of this material should be different from that of the impeller. If the fan uses an aluminum impeller, this item does not need to be considered).
3. The matching flange can be selected from ordinary flange or stainless steel chemical flange according to the user’s site.
4. Explosion-proof centrifugal fans use different motors from ordinary centrifugal fans. Explosion-proof centrifugal fans must use explosion-proof motors.