• 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

 

The 35t/h circulating fluidized bed boiler fan is characterized by high efficiency (85%), energy-saving performance with good system compatibility, low noise, smooth operation, and reliable adjustment capabilities. It is suitable for maintaining boiler efficiency from low to overload conditions (up to 10% overload). This energy-efficient centrifugal fan has become the preferred choice for 35t/h circulating fluidized bed boilers in the thermal power industry. Its impeller uses single-plate blades, which address the issues found in older hollow blade fans, such as wear-through and imbalance caused by ash accumulation. It is recommended to install an appropriate dust removal device at the inlet of the induced draft fan to minimize dust (especially large-particle abrasive dust), thereby extending the centrifugal fan's lifespan and reducing wear. The transmission of the 35t/h circulating fluidized bed boiler fan series utilizes a thin oil lubrication system. It is advisable to use L-AN32 or L-AN46 oil in winter, L-AN46 or L-AN68 in summer, or select the appropriate lubricating oil based on the working environment.
 

Form

1. 1. The centrifugal fan is available in both left-hand and right-hand configurations.
2. 2. The outlet position of the centrifugal fan is defined by the casing outlet angle.
3. 3. The fan adopts a D-type transmission, with a motor that is directly connected to the centrifugal fan through an elastic coupling.

Structural characteristics

 

The centrifugal blower mainly consists of an impeller, casing, air inlet, adjustment door, and transmission components.

1.  
2. 1. Impeller: The impeller is constructed with several blades welded between the conical arc wheel cover and the flat wheel disc, ensuring stability through static and dynamic balancing, resulting in smooth operation.
3. 2. Casing: The casing is fabricated with high-quality steel plates to form a volute structure.
4. 3. Air inlet: It features a convergent streamlined design made of plastic and is secured to the fan inlet with bolts.
5. 4. Adjustment door: The adjustment door regulates airflow, optimizing the air volume and pressure to achieve the best conditions for boiler operation.
6. 5. Transmission part: The transmission unit comprises the main shaft, bearing box, coupling, etc. The induced draft fan includes a water-cooling feature, with water consumption ranging between 0.5 to 1m³/h, depending on the ambient temperature.

Performance and selection

The performance of the centrifugal fan is defined by parameters such as flow rate, total pressure, shaft speed, power consumption, and efficiency. Performance for the blower and the primary and secondary centrifugal fans is based on an air medium at t=20°C, atmospheric pressure pa=101300Pa, and gas density ρ=1.2kg/m³. For the induced draft fan, performance is calculated considering a flue gas medium at t=140°C, atmospheric pressure pa=101300Pa, and gas density ρ=0.85kg/m³. The provided performance table is the reference for ordering. If the operating conditions differ, performance should be recalculated according to the appropriate formula.

Model	No.	Rotating Speed /(r/min)	Full Pressure /Pa	Air Flow /(m³/h)	Fan Power /kW	Motor
						No.	Power /kW
35-11A	14D	1450	11668	17670	85	Y315M-4	132
			11874	21793	101
			11771	25916	117
			11464	30040	133	Y355M-4	220
			10967	34163	151
			10457	38286	169
			9878	42409	189
35-12A	15	1450	13600	17680	102	Y315M2-4	160
			13850	21800	123
			13730	25920	142	Y355M-4	200
			13370	30050	162
			12790	34180	182	Y355M-4	250
			12190	38300	204
			11520	42410	228

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