Roots type aeration fan is a gas conveying equipment designed based on the Roots principle, widely used in industries such as sewage treatment, aquaculture, and chemical engineering. The following introduces the structure principle, performance characteristics, application advantages, selection points, and brand recommendations:
1、 Structure and Working Principle
Core structure: Composed of a pair of synchronous gears driven dual rotors, with a small gap (0.1-0.4mm) maintained between the rotors and the casing, achieving non-contact rotation through gear meshing.
Working process: The rotor rotates to form a volume change. After the intake port sucks in gas, it is compressed and transported to the exhaust port through the rotor chamber. There is no internal compression throughout the process, and a stable airflow is generated through forced exhaust.
Technical features: Gap sealing design reduces leakage, forced gas transmission process reduces flow rate with pressure changes, outlet pressure is determined by back pressure, suitable for high load conditions.
2、 Performance advantages
energy conservation
Adopting a three bladed rotor design reduces airflow pulsation compared to traditional two bladed structures, increases volumetric efficiency by 10-15, and reduces energy consumption by 8-12.
The synchronous gear transmission efficiency is over 98%, and the mechanical loss is less than 2.
Stable and reliable
Output pressure fluctuation ≤± 2, flow stability better than centrifugal fans, suitable for process flows that require gas supply.
The bearing design has a lifespan of over 50000 hours, and key components are made of ductile iron or stainless steel, which improves corrosion resistance.
Low maintenance cost
The lubrication free design reduces oil pollution, extends the maintenance cycle to over 2000 hours, and lowers annual maintenance costs.
The modular structure facilitates quick disassembly and assembly, and components such as gearboxes and bearings can be replaced separately.
Strong environmental adaptability
The noise control technology ensures that the operating noise of the equipment is ≤ 85dB (A), meeting the environmental protection requirements of industrial areas.
The protection level reaches IP54, suitable for high humidity and dust environments.
3、 Application scenarios
sewage treatment
Aeration and oxygenation: provide stable gas source for activated sludge process, improve DO concentration control accuracy, and reduce energy consumption.
Denitrification and denitrification: By using pulse gas supply technology to optimize carbon source utilization, the total nitrogen removal rate is improved.
Sludge mixing: replacing traditional mixers, reducing equipment quantity, and lowering failure rates.
aquaculture
High density aquaculture: Combined with microporous aeration discs, it achieves uniform distribution of dissolved oxygen in water and increases aquaculture density.
Circulating water system: Promote water circulation, facilitate the conversion of ammonia nitrogen and nitrite, and improve the compliance rate of water quality.
Industrial gas transportation
Chemical raw material transportation: The transportation pressure is stable, suitable for flammable and explosive gases, and the performance is improved.
Vacuum adsorption: Combined with a vacuum pump assembly, a vacuum system is formed, which increases the pumping rate.
4、 Key selection points
Airflow calculation
Sewage treatment: Calculated based on BOD load and aeration intensity, for example, a sewage treatment plant with a capacity of 1000m3/d requires air volume.
Aquaculture: Determine according to the breeding density, such as the air volume required for high-density shrimp ponds.
Pressure matching
Considering water depth, pipeline resistance, and aerator resistance, for example, an aeration tank with a water depth of 5m requires a wind pressure of ≥ 58.8kPa.
Energy efficiency optimization
Priority should be given to models with isothermal efficiency ≥ 70, such as the three bladed fan which is more energy-efficient than the two bladed fan.
Variable frequency control technology can achieve air volume regulation and significant energy-saving effects.
5、 Brand recommendation
Leading market share, Three Leaf Roots blower has low noise and vibration value ≤ 4.5mm/s, suitable for noise sensitive scenarios.
Provide customized services such as corrosion-resistant coatings, explosion-proof motors, etc.
Outstanding cost-effectiveness, recognized durability of the fan, with MTBF (Mean Time Between Failures) exceeding 8000 hours.
After sales service network coverage, fast response speed.
long drum
High end market representative, using KAPP gear grinding technology with high transmission accuracy, suitable for large-scale sewage treatment projects.
Provide a remote monitoring system to achieve real-time diagnosis of equipment status.
