Submersible mixers play an indispensable role in industrial fields, whether in wastewater treatment or chemical manufacturing. Its core component, the impeller, directly determines the efficiency of the mixing process.

Pitched Blade Impeller

Pitched blade impeller is a very common and practical type of submersible mixer. This impeller design features flat blades that form a certain angle (approximately 30 to 45 degrees) to the plane of rotation. Such an inclined design enables the inclined blade impeller to produce both axial and radial fluid flow, making it ideal for a variety of mixing tasks. Its main advantage lies in its strong axial driving force, which has a significant effect on maintaining solid suspension and promoting uniform mixing throughout the tank. In addition, the inclined blade impeller is also energy-saving. Compared with other designs, it requires less power and is easy to manufacture and maintain. Therefore, it has been widely used in wastewater treatment, mud mixing and other occasions.

Axial Flow Impeller

Axial flow impellers focus on generating powerful fluid flow parallel to the impeller axis, primarily in the axial direction. Their propeller-like design, typically equipped with three to four blades with significant pitch angles, is designed to maximize axial flow efficiency while reducing radial flow. The main advantage of axial flow impellers is their ability to produce high flow rates with low power consumption, making them ideal for large-scale mixing operations, especially where energy efficiency is required. Axial flow impellers play an important role in many fields, including wastewater treatment, chemical processing, and food and beverage manufacturing. In addition, axial flow impellers can be adapted to a variety of tank geometries, although in unbaffled tanks special attention may be required to avoid the effects of surface vortices.

Radial Flow Impeller

Radial flow impellers are dedicated to generating strong radial fluid flow, pushing the fluid from the center of the impeller to the tank wall. Its vertical straight blade design produces high shear rates and intense turbulence near the impeller, making it ideal for applications that require breaking up clumps, dispersing gases, or promoting rapid chemical reactions. Radial flow impellers excel in gas dispersion, high viscosity mixing, and rapid heat transfer processes such as fermentation processes, wastewater aeration, etc. However, the power consumption of radial flow impellers is higher compared to axial flow impellers.

Turbine Impeller

Turbine impellers are a more flexible design that can generate radial and axial fluid flow as needed. It features multiple flat or curved blades arranged around a central hub; the number, shape and arrangement of the blades can be adjusted to the specific application. Turbine impellers are favored for their versatility and efficiency and are suitable for a variety of processes including gas-liquid dispersion, solid suspension in high-viscosity fluids, and processing of immiscible liquid-liquid systems.

When choosing a submersible mixer, in addition to considering the design of the impeller, you also need to pay attention to the overall quality and reliability of the equipment. As a leader in the field of submersible mixers, Tianjin Kairun provides a series of products certified by ISO 9001 quality management system, aiming to meet the diverse needs of different industries. Customers can choose the most suitable mixer based on their specific application needs. Tianjin Kairun's professional team will provide customers with valuable advice and support to help them choose the submersible mixer that best suits their needs. If you have any needs or questions, please feel free to contact us via email (catherine@kairunpump.com).

References:

1. Paul, E. L., Atiemo-Obeng, V. A., & Kresta, S. M. (2004). Handbook of Industrial Mixing: Science and Practice. John Wiley & Sons.

2. Harnby, N., Edwards, M. F., & Nienow, A. W. (1997). Mixing in the Process Industries. Butterworth-Heinemann.

3. Oldshue, J. Y. (1983). Fluid Mixing Technology. McGraw-Hill.

4. Tatterson, G. B. (1991). Fluid Mixing and Gas Dispersion in Agitated Tanks. McGraw-Hill.

5. Dickey, D. S., & Hemrajani, R. R. (2008). Recipes for Fluid Mixing. Chemical Engineering.