Blowers are key equipment used in industries, environmental protection, aquaculture, and other fields to transport air or gas. Different scenarios have different requirements for air volume, pressure, noise, etc., so choosing the appropriate type of blower is crucial. This article systematically introduces the classification, performance characteristics, and application scenarios of mainstream blowers, helping users accurately match their needs.
1、 Core types of blowers
1. Centrifugal blower
Working principle: Centrifugal force is generated by a high-speed rotating impeller, which accelerates the air and outputs it.
Performance characteristics:
High air volume (up to tens of thousands of m 3/h), moderate pressure (usually<100kPa).
Smooth operation with low noise (75-85dB).
High efficiency (70% -85%), suitable for continuous operation.
Typical applications:
Sewage treatment aeration, metallurgical furnace blowing, chemical gas transportation.
2. Roots blower (volumetric)
Working principle: By relying on two meshing rotors to squeeze gas, constant volume conveying is achieved.
Performance characteristics:
Wide pressure range (9.8-98kPa), stable air flow (1-300m 3/min).
The structure is simple and easy to maintain, but the noise is relatively high (85-100dB).
No internal compression, low efficiency (50% -65%).
Typical applications:
Pneumatic conveying, aquaculture oxygenation, and small incinerator air supply.
3. Axial flow blower
Working principle: Gas flows axially, similar to an enlarged version of an electric fan.
Performance characteristics:
The air volume is extremely high (>100000 m 3/h) and the pressure is low (<10kPa).
Low energy consumption, but weak pressure resistance, not suitable for high resistance working conditions.
Typical applications:
Tunnel ventilation, forced ventilation of cooling towers, and ventilation of factory buildings.
4. Screw blower
Working principle: Compressed gas is achieved through the engagement of a screw rotor, which combines the advantages of centrifugal and volumetric methods.
Performance characteristics:
High pressure (up to 200kPa), moderate air volume (10-200m 3/min).
Low noise level (70-80dB), strong energy efficiency (saving 20% -30% energy compared to Roots fans).
High price, suitable for high demand scenarios.
Typical applications:
Food industry sterile air supply, precision instrument air source, high-end wastewater treatment.
2、 Comparison of key performance parameters
Type: Airflow Range, Pressure Range, Efficiency, Noise Level, Applicable Scenarios
Centrifugal high (>1000m 3/h) medium and low pressure 70% -85% 75-85dB sewage treatment, chemical industry
Roots type (1-300m 3/min) medium pressure 50% -65% 85-100dB pneumatic conveying and breeding
Axial flow maximum (>100000 m 3/h) low pressure 60% -75% 80-90dB tunnel ventilation and cooling tower
Screw type (10-200m 3/min) high pressure 75% -90% 70-80dB food industry, precision manufacturing
3、 Selection suggestions
Clarify the priority of requirements:
High wind volume and low pressure → Axial flow type
Stroke volume pressure → Roots/centrifugal
High pressure and low noise → Screw type
Pay attention to energy efficiency and cost:
Choose high-efficiency models (such as screw type) for long-term operation, and consider Roots type for short-term projects.
Special environment adaptation:
Corrosive gases require stainless steel material, and explosion-proof motors are selected for explosion-proof scenarios.
Conclusion
The selection of blower needs to comprehensively consider the four core indicators of air volume, pressure, efficiency, and noise, and combine them with industry scenario budget. It is recommended that users provide specific operating parameters (such as gas composition, pipeline resistance), and professional manufacturers recommend suitable models.
If you need technical support or performance testing for blower selection, please feel free to contact the engineering team!
