Roots blower aerator is a key equipment that combines Roots blower and aeration device, widely used in fields such as sewage treatment and aquaculture, to enhance dissolved oxygen in water through gas transportation and aeration technology. The following will introduce its working principle, performance advantages, application scenarios, and selection points:
1、 Working principle
The Roots blower aerator uses the Roots blower as the core power source, and utilizes two three bladed rotors to rotate synchronously in opposite directions inside the cylinder, forming a sealed chamber to achieve gas compression and transportation. Gas is sucked in through the inlet, compressed by the rotating rotor, and transported to the aeration device (such as microporous aeration tube or aeration disc) through pipelines, forming tiny bubbles in the water to improve dissolved oxygen efficiency.
2、 Performance advantages
stability
The Roots blower achieves stable airflow output through volumetric compression, with small fluctuations in air volume, ensuring the continuous operation of the aeration system.
The forced gas transmission characteristic makes its flow rate minimally affected by pressure changes, making it suitable for complex working conditions.
Durable and low consumption
The three blade rotor design reduces airflow pulsation and mechanical vibration, significantly extends the life of bearings and gears, and has a maintenance cycle of over 2000 hours.
The synchronous gear transmission efficiency exceeds 98%, and the energy consumption is reduced by 8-12 compared to traditional fans. The long-term operating cost advantage is obvious.
Strong adaptability
It can transport clean air or weakly corrosive gases with a dust content of ≤ 100mg/m3, and can be expanded to the chemical industry through stainless steel material upgrades.
The explosion-proof motor and sealing design support the transportation of flammable and explosive gases, meeting production standards.
3、 Application scenarios
sewage treatment
Activated sludge process: provides stable oxygen for the aeration tank, promotes microbial degradation of organic matter, and increases BOD removal rate by 15-20%.
Denitrification and denitrification: By optimizing carbon source utilization through pulse gas supply, the total nitrogen removal rate is increased by 10-15%.
Sludge mixing: replaces traditional mechanical mixers, reduces energy consumption by more than 30%, and reduces failure rates by 50%.
aquaculture
High density aquaculture: With the use of nano aeration discs to achieve uniform distribution of dissolved oxygen in water, the aquaculture density is increased by 40-60%.
Circulating water system: Promote water circulation to accelerate the conversion of ammonia nitrogen, and increase the water quality compliance rate to over 98%.
4、 Key selection points
Air volume matching
Wastewater treatment needs to be calculated based on BOD load and aeration intensity, for example, a treatment capacity of 1000m3/d requires an air volume of approximately 15-20m3/min.
Aquaculture is determined according to the breeding density, for example, a 10 acre shrimp pond requires an air volume of 8-12m3/min.
Pressure adaptation
Considering water depth, pipeline resistance, and aerator resistance, for example, a 5m water depth aeration tank requires a wind pressure of ≥ 58.8kPa.
Energy efficiency optimization
Priority should be given to choosing a three blade Roots blower with isothermal efficiency ≥ 70, which can achieve 20-30 energy-saving effects with variable frequency control.
Environmental adaptability
IP55 protection level motors are required for high humidity environments, and 304 stainless steel material is recommended for coastal areas.
