Medium-Pressure Centrifugal Fan

Product Description
Medium-pressure centrifugal fans are industrial ventilation equipment that utilizes centrifugal force to transport gas. Their operating pressure range falls between that of low-pressure and high-pressure fans, simultaneously meeting the demands for high air volume and pressure.

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Applications

* Environmental Dust Removal: Used in the induced draft systems of various dust removal equipment.

* Metallurgical Industry: Steelmaking dust removal, sintering machine induced draft, blast furnace blasting, and combustion systems.

* Petrochemical Industry: Chemical gas transportation, tail gas recovery, and ventilation for catalytic cracking units.

* Cement and Building Materials: Kiln head and tail induced draft, raw material mill and coal mill ventilation systems.

* Power Energy: Power plant boiler forced draft, induced draft fans for circulating fluidized bed boilers.

* Gas ​​transportation and pressurization in waste gas treatment systems.

* Flue gas recirculation in flue gas desulfurization (FGD) systems.

• Air supply and exhaust systems for waste incinerators.

• Centralized ventilation systems for large venues, requiring stable medium-pressure airflow for long-distance transport.

• Kitchen exhaust and fume extraction in public places such as canteens, hotels, and restaurants.

• Mine ventilation and general ventilation systems.

• High-temperature gas transport: Type C and D models with cooling impellers are suitable for furnaces, burners, and high-temperature gas circulation at temperatures not exceeding 200℃; some models can reach up to 600℃.

• Explosion-proof locations: Can be manufactured in explosion-proof (BDHF-Z-II) and corrosion-resistant (FDHF-Z-II) versions, suitable for hazardous environments such as chemical plants and coal mines.

• Dust particle transport: Suitable for transporting gases with high dust content, high flue gas temperature, or containing condensate.

Technical Advantages

1. Core Component – ​​Impeller Design

The impeller is the core component of the medium-pressure centrifugal fan. The high-quality impeller uses backward-curved R-plate blades. The blades and impeller cover are molded, precisely positioned, and continuously welded. After forming, they undergo static and dynamic balancing, achieving a balance grade ≤4.0 (national standard). This results in excellent aerodynamics, high efficiency, low noise, and stable performance. For dusty gas conditions, radial blades or an anti-wear coating can be added to significantly improve wear life.

2. Volute and Housing

The housing uses a continuously welded volute made of high-quality steel plate, providing high structural strength and good airtightness, effectively preventing gas leakage. The product surface is treated with spraying or baking paint for an aesthetically pleasing appearance. For larger sizes (1400mm and above), a split-type structure can be manufactured for easy assembly and disassembly in height-restricted locations.

3. Air Collector

The convergent streamlined air collector is molded, providing excellent rectification, effectively reducing intake turbulence, improving efficiency, and lowering noise. It is integrated with the inlet ring for convenient pipe connection.

4. Transmission System

The transmission system employs an integrated cast iron gearbox, ensuring precise bearing coaxiality, compact size, low oil consumption, high stability, and easy maintenance. The main shaft is precision-machined from high-quality 45# carbon steel, providing ample safety and fatigue resistance.

5. Base and Vibration Damper

The integrated steel base provides high structural strength and incorporates spring vibration dampers for vibration isolation, significantly reducing vibration transmission and improving operational stability.

6. Performance Advantages

Wide High-Efficiency Range: Prevents performance degradation caused by slippage at the operating point.

Low Vibration: Overall machine amplitude can be controlled below 3mm/s as a factory standard.

Low Noise: A special noise reduction device is added to the volute housing and motor, resulting in overall noise levels superior to similar products.

Long Lifespan: Strict quality control ensures a lifespan of up to 20 years (excluding wear parts).

Minimum Maintenance: Optimized overall structure requires minimal or no maintenance.

Technical Parameters