Top Entry Mixers (Hydrofoil)

for Advanced Water and Wastewater Treatment

• for Flocculation
• for Sewage Treatment
• for wastewater Treatment
• for Other Uses

Hydrofoil Impeller

Optimizing mixing system needs an appropriate application technology of suitable impeller. Woojin agitator`s impeller design covers from simple flat blade to axial flow hydrofoil blade; the most advanced one is hydrofoil blade. It can be applied to any kind of mixing process of water treatment. Woojin Co., Ltd. developed hydrofoil impeller design in 3 years, from 1999 to 2011.

Special Quality of Woojin Hydrofoil Impeller

• Low Power Number(Np=0.3)
• High Pumping Number(Nq=0.6)
• High efficiency fluid dynamic by low power consumption
• Maintains uniform concentration of mixed materials in basin fluid.

for Anoxic and Anaerobic Tank

The agitators can be used for removal of nitrogen and phosphorus in the advanced wastewater treatment. They are the most appropriate agitators for floating sludge sediment without inflow of oxygen in the advanced wastewater treatment.

for Flocculation
They are the most appropriate mixers for coagulation with optimum conditions in chemical sedimentation of the advanced water treatment.

How to Optimize the Design of Mixers

CFD
CFD(Compulation Fluid Dynamics) has the widest range of physical models available in the industry, letting you simulate almost any conceivable flow application.

FEM
FEM is the method of choice in all types of analysis in structure mechanics(i.e. solving for deformation and stresses in solid bodies or dynamics of structures)

PIV
Particle Image Velocimetry(PIV) systems provide two or three-dimensional velocity maps in flows using whole field techniques based on imaging the light scattered by small particles in the flow illuminated by a laser light sheet.

Optimum Control System for Flocculation

The velocity gradient for flocculation to maintain a certain agitation intensity according to variation of raw water condition(turbidity, residence time, temperature, water level) to help floc growth at flocculation process of the water treatment plant.

Logic

The Efficiency of Energy Saving

This impeller design has tremendous potential for applications with high and constant mixing levels. The design of impeller should maximize pumping capacity at any level of mixer energy input. The Hydrofoil Impeller is ideal for any large mixing application requiring high flow. Pohang wastewater treatment plant treats 168,000 tons of wastewater per day. The plant aimed at energy saving of 30kW from the previous designed power.
We performed the pilot test at our lab for the project, and designed four blade neo-hydrofoil impeller with low speed RPM.

The pilot test showed the power could be saved 26% from the previous designed power

Application

for Sewage Treatment

for Water Treatment