• Durability: Vinylester resin, UV protection, extended service life.
• Customizable: Computer strain analysis, G2.5 balance, low vibration risk.
• Easy Maintenance: Oil bath bearings, heat/corrosion resistant, cost-effective.
• Professional Team: Expert wind turbine guidance.
• High aerodynamic efficiency, low noise, corrosion resistance.
• Medium temp range: -20℃ to 80℃, ≤ humidity, ≤ 100mg/m3 dust content.
• Durable Fiberglass Build: Ensures long-lasting performance.
• Ethylene-based fiberglass blades optimize airflow.

Application

This centrifugal blower is specifically designed for 35t/h circulating fluidized bed and boiling boiler use. The ventilator conveys air, with a temperature limit of 80°C, while the induced draft blower handles flue gases at temperatures not exceeding 250°C. To ensure the lowest possible dust content in the flue gases entering the centrifugal blower, an appropriate dust removal system should be installed in advance of the induced draft fan.
 

Form

1. 1. The centrifugal blower is a single-suction model.
2. 2. Viewed from the motor end, if the impeller rotates in a clockwise direction, it is a right-hand cyclone blower, indicated by "right." If the impeller rotates counterclockwise, it is a left-hand blower, indicated by "left."
3. 3. The air outlet of the centrifugal blower is defined by the outlet angle of the casing.
4. 4. The blower transmission mode is D type and employs a pin coupling for secure operation.

Structural characteristics

This industrial centrifugal blower is composed of the impeller, casing, air inlet, adjusting door, and transmission components.

1.  
2. 1. Impeller: Blades are welded between the curved front and the flat rear discs, with both static and dynamic balancing performed to ensure stable operation of the centrifugal blower.
3. 2. Casing: Constructed from high-quality steel plates welded into a volute shape, the casing ensures robust, long-lasting performance.
4. 3. Air Inlet: The convergent and streamlined air inlet allows for efficient airflow into the impeller, minimizing energy losses.
5. 4. Adjustment Door: Positioned axially before the air inlet, the adjustment door helps regulate the centrifugal fan flow rate. The range of movement extends from 0° (completely open) to 90° (completely closed). When the door is viewed from the air inlet, the lever's position determines adjustment: pushing the lever from bottom to top fully opens the door for right-hand centrifugal fans; pulling the lever from top to bottom achieves the same effect for left-hand models. All parts of the adjustment door should be adequately lubricated for smooth operation. High-temperature conditions in the induced draft blower necessitate the use of molybdenum disulfide high-temperature lubricant (260°C) for reliable lubrication.
6. 5. Transmission Part: Featuring a high-quality steel main shaft, the centrifugal blower employs rolling bearings, with a water-cooling system integrated into the induced draft blower to maintain efficient performance.

Performance and selection

Upon installation of the centrifugal blower, unexpected flow issues, such as excessive or insufficient flow, may occur due to the following factors:
① Pipe network resistance might deviate significantly from calculated values. According to the general pipe network characteristic equation p=Kq², deviations in the resistance coefficient (K) can increase or decrease the airflow rate accordingly.
② If the total pressure deviation (∆p) is not considered during the selection process, this may also result in deviations in the flow rate—higher pressure results in increased flow, while lower pressure reduces flow.

To mitigate flow issues, several corrective methods may be employed: regulating the degree of the adjustment door; adjusting the speed of the centrifugal blower; or replacing the centrifugal blower with one that better suits the operating requirements. Alternatively, adjusting the pipe network resistance coefficient may provide the desired results.

Throttling devices are often used to control flow rates, but this can be inefficient and may lead to excessive energy use if the flow rate greatly exceeds the required level. In such cases, reducing the centrifugal blower speed or replacing the blower with one of lower pressure would be more economical. When the adjustment door is fully open and the flow rate is still insufficient, other corrective measures, such as reducing the pipe network's resistance coefficient or increasing the blower speed, should be considered. However, the maximum speed should not exceed the limits specified in the performance table.
The performance of the centrifugal blower generally refers to standard conditions. For induced draft blowers, the specified conditions are atmospheric pressure pa=101.3kPa, gas temperature t=140°C, 200°C, and gas density ρ=0.851kg/m³, 0.743kg/m³. The performance table should be referred to when ordering to ensure the centrifugal blower meets the required specifications for optimal performance.