Essential details
Quantity(pieces):1
MOQ:1
Lead time:30
Shipping:Land transportation, sea transportation
Specification Number:引风机
Product Introduction
The induced draft fan generates negative pressure through the rotation of the impeller to extract flue gas and maintain the operation of the boiler system.
The core of the working principle and function of the induced draft fan lies in generating negative pressure through the rotation of the impeller, extracting the hot flue gas from the boiler and maintaining the stable operation of the system. The following is a specific analysis:
Working principle
The core of the working principle and function of the induced draft fan lies in generating negative pressure through the rotation of the impeller, extracting the hot flue gas from the boiler and maintaining the stable operation of the system. The following is a specific analysis:
Working principle
Power drive and impeller rotation: When the motor drives the impeller to rotate at high speed, the blades push the airflow to accelerate. This process is based on the working principle of the axial-flow fan, and the impeller design follows the principles of fluid mechanics (such as the airfoil theory), causing a pressure difference to occur on the surface of the blades.
Energy conversion: When the flue gas passes through the impeller, kinetic energy is converted into static pressure energy, and then further converted into the required pressure through the rear guide vane and the diffuser. The key components involved here include the front guide vane, the rear guide vane, the diffuser, etc.
Negative pressure formation and airflow control: The rotation of the impeller causes the pressure at the exhaust port to decrease (Bernoulli's principle), forming a negative-pressure area, which prompts the flue gas to be sucked in and discharged. The operating range of the induced draft fan is limited by the stall line. If it exceeds this limit, surge (periodic airflow backflow) may occur, and it is necessary to monitor and alarm through the stall measuring points.
Energy conversion: When the flue gas passes through the impeller, kinetic energy is converted into static pressure energy, and then further converted into the required pressure through the rear guide vane and the diffuser. The key components involved here include the front guide vane, the rear guide vane, the diffuser, etc.
Negative pressure formation and airflow control: The rotation of the impeller causes the pressure at the exhaust port to decrease (Bernoulli's principle), forming a negative-pressure area, which prompts the flue gas to be sucked in and discharged. The operating range of the induced draft fan is limited by the stall line. If it exceeds this limit, surge (periodic airflow backflow) may occur, and it is necessary to monitor and alarm through the stall measuring points.