It is boiler induced draft fan with a total internal pressure efficiency of 90.5% specially designed to be suitable for various coal quality and equipped with a smoke-and-dust removal device (1~20 tons/hour).
This type of fan is currently used in the boiler industry. The air volume of the induced draft fan and the difference in wind pressure are relatively large, in order to adapt to the above situation, considering the practicability of the fan, in addition to the 20-ton boiler ID fan need large power coupling direct transmission, the other uses the triangular belt type transmission.
5-11 series centrifugal ventilation fan Structure
5-11 series centrifugal ventilation fan Application
Centrifugal fan is widely used in the cement industry, building materials industry, environmental protection industry, metallurgical industry, power industry projects such as large-scale dust collector, industrial boilers, ventilation systems, cooling.
5-11 series centrifugal ventilation fan Features
It is capable of outputting a higher outlet pressure while providing more gas flow with lower noise. Stable operation at higher media temperatures.
The adjustment door can be used to flexibly adjust the pressure and flow of the fan during operation. It can also be equipped with a variable frequency motor to adjust the pressure and flow of the fan by changing the speed.
The bearing cooling method selects a low-cost water-cooling method or an oil-cooling method with better heat dissipation depending on the gas temperature and the conditions of the use environment. For extremely high temperature operating conditions, an electronic cooler can also be added to absolutely protect the reliable operation of the fan system.
For the materials of impeller and main shaft, for different working conditions and working speed, we will choose high-strength carbon steel, low-alloy steel, high-temperature alloy steel, high temperature resistant high-strength alloy steel, make the impeller and main shaft to maintain reliable strength at high temperatures.
For dust-containing gas, we can meet various working conditions from a small amount of dust to a very large dust content. After special treatment, the surface hardness of the blade can reach HRC60~70, which can extend the life of the impeller by more than 3 times.
The bearing housing is reserved for temperature and vibration sensor mounting positions, for convenient to install the fan operation monitoring device.
The weld and the main shaft of the impeller are ultrasonic flaw detection to ensure that there are no welding defects and material defects to ensure strength.
After the production is completed, all products are tested for running and vibration values for reliable operation.
There are a variety of accessories to choose from.
5-11 series centrifugal ventilation fan Specification
| Series no. | 5-11 series | Feature selection | |||||
| Normal | anti-corrosion | wear-resisting | High temperature | anti-explosion | Remarks | ||
| Performance | Impeller diameter | 400-3300mm | |||||
| Rotation speed | ≤4000rpm | ||||||
| Pressure range | 684-9887Pa | ||||||
| Flow range | 590.4-560735㎥/h | ||||||
| Structure | Blade type | Backward, Straight, Aerofoil type | |||||
| Impeller support | SWSI(Single Width, Single Inlet), DWDI(Double Width, Double Inlet), Overhung type | ||||||
| Lubrication method | Oil bath lubrication, grease lubrication, lubrication oil station | Can be specified | |||||
| Cooling method | Air cooling, Water cooling, Oil cooling | Can be specified | |||||
| Driven mode | Direct driven, Coupling driven, Belt driven | Can be specified | |||||
| Gas composition | Gas temperature | Normal | Customer request | Customer request | ≥250℃ | Customer request | |
| gas characteristic | Clean gas | Corrosive gas | Particulate dust | High temperature gas | Flammable gas, explosive gas | ||
| System configuration | Motor brand | Chinese famous brand, ABB, Siemens, WEG etc | Can be specified | ||||
| Impeller | High quality carbon steel | FRP, Stainless steel, Rubber Lining | Wear-resistant layer or wear-resistant liner, ceramic patch | High temperature high quality alloy steel | FRP, Aluminum alloy | Can be specified | |
| Air inlet cone | High quality carbon steel | FRP, Stainless steel, Rubber Lining | High quality carbon steel | High quality carbon steel | High quality carbon steel | Can be specified | |
| Casing | High quality carbon steel | FRP, Stainless steel, Rubber Lining | High quality carbon steel | High quality carbon steel | High quality carbon steel | Can be specified | |
| Air damper | High quality carbon steel | FRP, Stainless steel, Rubber Lining | High quality carbon steel | High quality carbon steel | High quality carbon steel | Can be specified | |
| Main shaft | High strength carbon steel, Alloy structural steel | Can be specified | |||||
| Bearing | ZWZ, SKF, FAG, NSK | Can be specified | |||||
| Bearing housing | Cast iron | ||||||
| Foundation bolts | GB799-1988 | ||||||
| Option parts | System base frame, Protective screening, Silencer, Inlet & Outlet flexible connections, Inlet & Outlet counter flange, Air damper, Electric actuator, Shock absorber, Diaphragm coupling, Fluid coupling, Motor rain cover, Temperature sensor, Vibration sensor, Soft starter, Inverter, Special Electrical Motor, System monitoring Instrument. | ||||||