ID Fan in Power Plant

Centrifugal fans are key auxiliary equipment in modern coal-fired power plants, ensuring efficient and safe operation of boilers. Their core function lies in providing continuous and stable airflow for both the combustion system and the environmental protection system. Their primary application is focused on the boiler's ventilation system, specifically divided into two major categories: forced draft fans and induced draft fans.

At the front end of the process, the forced draft fan is usually arranged before the air preheater. It sucks air from the environment, pressurizes it, and sends it into the system. This airflow first passes through the air preheater to absorb the residual heat of flue gas, and after increasing its own temperature, a portion of it is sent into the furnace as secondary air to support combustion and disturb the airflow inside the furnace, ensuring that pulverized coal and air are fully mixed and completely burned; the other portion is used as primary air to transport pulverized coal ground by the coal mill and spray it into the furnace. This process requires the fan to provide sufficient pressure to overcome the resistance of the air preheater, air duct, and burner.

At the end of the process, the induced draft fan is arranged after the dust collector and desulfurization system, functioning similarly to the "breathing organ" of a boiler. It draws the high-temperature flue gas generated by combustion in the boiler through all heating surfaces and environmental protection facilities such as the economizer, air preheater, electrostatic precipitator, and desulfurization absorber tower in sequence, and finally discharges the purified low-temperature flue gas into the atmosphere. During this process, the induced draft fan needs to overcome the huge resistance of the entire tail flue and maintain a slight negative pressure inside the furnace, which is crucial for preventing flue gas leakage and ensuring the safety of the plant.

In addition, centrifugal fans are also widely used in other areas of power plants, such as air-cooled fans that provide cooling air for large motors, transformers, and other equipment, as well as pneumatic airflow devices that provide pneumatic force for ash removal from the plates of electrostatic precipitators. Due to the high temperature or dusty flue gas they handle, power plant fans have extremely high requirements for material wear resistance, corrosion resistance, and operational reliability

Suitable Model: Centrifugal Fan