The stainless steel swirl aerator features a large service area, low pressure loss, stable and reliable operation, non-clogging performance, and extended service life.
It is mainly used in industrial wastewater and municipal wastewater aeration systems, and shows outstanding performance in wastewater with high salinity, high pollutant concentration, high suspended solids, high hardness, and strong scaling tendencies.

Detailed Description
The Stainless Steel Swirl Aerator has the following characteristics:
Special swirl structure for full-tank circulation
The unique structure of the swirl aerator allows air to be discharged upward from inside the unit. At the same time, the water beneath the aerator is entrained and lifted upward by the rising airflow.
In addition to aeration, the swirl aerator induces strong vertical circulation and mixing, ensuring uniform oxygen distribution throughout the aeration tank with no dead zones.
Multi-layer air cutting with mushroom-shaped design
The internal multi-layer cutters adopt a mushroom-head configuration, which effectively cuts the air into fine bubbles without increasing airflow resistance.
This design enables efficient gas–liquid mixing and multi-stage air cutting, significantly improving oxygen utilization efficiency.

Non-clogging and maintenance-free operation
The internal structure ensures that the swirl aerator does not clog under either continuous or intermittent operating conditions, allowing long-term, maintenance-free use.
Large flow-channel design
The large internal channels make the swirl aerator particularly suitable for wastewater with high suspended solids, high hardness, and scaling potential, with a service life of more than 10 years.
Strong bottom suction and sludge lifting effect
The layered mushroom-head structure and large internal channels create a strong vacuum at the bottom of the aerator during air discharge.
This vacuum effect lifts bottom sludge together with the airflow, promoting thorough mixing and preventing sludge accumulation.
All-stainless-steel construction
The fully stainless steel swirl aerator is easy to install, resistant to damage, and offers a long service life of 10–15 years.

Performance Parameters

Computational Fluid Dynamics (CFD) Simulation
To ensure optimal performance, extensive testing of various parameters was carried out, including air inlet configuration, water inlet method, and swirl angle.
During the product design stage, large-scale experimental testing was conducted for different models of the swirl aerator. Based on the experimental data, Computational Fluid Dynamics (CFD) simulations were performed simultaneously.
Through three-dimensional computer modeling, detailed analyses were conducted on:
Internal flow velocity
Gas–liquid mixing behavior
Pressure distribution
Oxygen concentration distribution
Based on these analyses, the aerator structure was optimized and improved multiple times. Field tests under actual operating conditions further confirmed that the swirl aerator achieves high oxygen transfer efficiency while maintaining extremely low pressure loss.
The figures below show examples of the CFD simulation process.

After simulation and optimization, the structural configuration of the swirl aerator was preliminarily determined.
Further simulations were conducted to analyze the operating conditions of the swirl aerator in water, including the upward and downward flow velocities and their distribution, as shown below.

(Note: Arrow length represents flow velocity magnitude—the longer the arrow, the higher the velocity. Arrow direction indicates flow direction.)
The simulation results clearly show a strong upward flow in the central area above the aerator and a downward flow near the edges, forming an effective large-scale circulation pattern within the tank.

Applications and Advantages
The Swirl Aerator is suitable for:
Municipal wastewater
Textile dyeing wastewater
Chemical wastewater
Coal chemical wastewater
Papermaking wastewater
Starch wastewater
Alcohol wastewater
Soy product wastewater
Food processing wastewater
New and retrofit aeration tank projects in wastewater treatment plants
For wastewater with high salinity, high oil content, high hardness, and strong scaling tendencies, the swirl aerator demonstrates significantly greater advantages compared with other aeration devices.
Existing aerators in operating systems can be completely replaced with swirl aerators without modifying the original main pipelines, allowing fast installation, reduced construction time, and minimal downtime.