Double vane-type vertical axis mixer
Outline
It is a mixer for an anaerobic tank and anoxic tank featuring high maintainability that is achieved with a drive mechanism that is positioned on the tank. With its newly developed double vanes, it agitates every corner of an aeration tank of 12 m or less in depth using a low power level of 1 W/m3 in terms of mixing power density.
- Awarded a METI Minister Award (36th Excellent Environment System Award Project sponsored by the Japan Society of Industrial Machinery Manufacturers)
- Product compliant with construction technology review (sewage technology) No. 0924
Features
Energy saving
- Mixing power density of 1 W/m3 or less (for both deep and standard aeration tanks)
High maintainability
- With the drive system positioned on the tank, daily checks are easily conducted.
- Impellers can be inspected by taking them out of the tank without having to drain it.
Excellent mixing performance
- With its newly developed double vanes, it agitates every corner of an aeration tank of 12 m or less in depth.
- Active sludge floc will not become spoiled due to low speeds (approx. 10-20 rpm).
Ideal for plant modification and renovations
- No removal of the existing baffle plates, beams, etc. is required for installation as part of modification work on the deep tank.
- Scrap removal costs and construction work periods can be reduced.
Construction of mixers and aeration tanks
A large-sized impeller, rotating at a low speed, generates an intense downflow. Then, a large swirl flow going from the bottom to the surface of the tank causes a slow movement in the entire aeration tank.
It is highly corrosion-resistant and durable thanks to the stainless steel used for the wetted components. All components are made in Japan for high reliability, allowing for deliveries with the shortest lead times in the event of an emergency.
Delivery case
A wastewater treatment plant in Osaka (delivered in FY2008)
Specifications
| Aeration tank capacity | Approx. 800 m3 deep aeration tank |
|---|
* Aerobic tanks of four (4) reservoirs were modified into anaerobic tanks (two (2) reservoirs at a time) during a single-year construction project while preserving the existing reinforced concrete baffle plates and lateral beams.
CFD simulation
Through the extensive use of dynamic flow analyses, you can select the optimum type for various tank geometries.
