INDUCED DRAFT FANs

The induced draft fan is normally located at the outlet between the dust collector and the chimney. The fan takes hot flue gases from the boiler through a dust collector and delivers them to the chimney into the open atmosphere. ID fan creates negative pressure or suction to discharge the gases after combustion from the furnace. Since ID fans can handle hot flue gases, they have more corrosion and erosion problems even when used with Electrostatic precipitators. The most common type of fans that can be used as ID fans are radial fans and backward-inclined blade centrifugal fans.
ID fans, short for induced draft fans, are essential in power plants and industrial facilities to supply air for combustion. They create negative pressure or suction between the air preheater and the chimney, drawing flue gases out of the furnace and into the chimney. When designing an ID fan, several factors must be considered: flow rate, pressure, power consumption, size and weight, and material. The flow rate of the ID Fan is an important consideration because it determines the amount of air that the fan will be able to supply to the system. The flow rate should be matched to the needs of the system to ensure that it can operate efficiently. The pressure of the ID Fan is another important consideration because it determines the amount of force that the fan will be able to exert on the system. Higher-pressure fans are generally more expensive, but they are also able to handle more difficult applications. The material of the ID Fan is an important consideration because it can impact the durability and longevity of the fan. Fans made from more durable materials, such as stainless steel, are generally more expensive but may be a good investment if the system is expected to operate for a long time.