The Unsung Hero in Wastewater Treatment Systems
In modern wastewater treatment plants, submersible mixers play a vital role in mixing and flow circulation. Widely used in equalization tanks, anaerobic tanks, anoxic tanks, oxidation ditches, and other process units, they ensure effective mixing, stable microbial activity, and optimal treatment performance. Let's explore how these devices work and what to consider when selecting the right model for your project.
How Submersible Mixers Work
Submersible mixers use an electric motor to drive impellers that rotate underwater at high speed, generating strong fluid movement. This creates a continuous flow field, achieving uniform mixing of liquids or suspended solids. Operating entirely underwater, these mixers reduce splash and noise compared to traditional surface mixers.
Two key parameters determine mixing performance:
Thrust (N): Measures the mixer's ability to drive water movement;
Flow Rate (m³/h): Refers to the volume of water circulated per hour.
By optimizing impeller design and rotation speed, submersible mixers can deliver either high-speed strong mixing or low-speed large-volume flow to suit different process needs.
Common Applications
|
Application Area |
Function |
|
Equalization Tank |
Prevent sedimentation and maintain water uniformity |
|
Anaerobic Tank |
Mix sludge and wastewater to enhance reactions |
|
Anoxic Tank |
Improve denitrification efficiency |
|
Oxidation Ditch |
Circulate flow, prevent dead zones |
|
Chemical Dosing Tank |
Ensure rapid and even mixing after chemical addition |
3. Key Factors in Model Selection
A submersible mixer is not simply "the bigger, the better." Scientific selection ensures both performance and longevity.
Power
Choose appropriate power (commonly 0.85kW to 7.5kW) based on tank size, water depth, and process requirements.
Impeller Diameter & Material
Large-diameter impellers generate low-speed, high-volume mixing;
Materials like stainless steel or fiberglass-reinforced plastic (FRP) offer corrosion and wear resistance.
Installation Type
Guide rail type: ideal for permanent installations;
Portable type: suitable for temporary or flexible setups.
Protection Level & Sealing
Look for IP68-rated motors and dual mechanical seals to ensure long-term underwater operation.
Flow Simulation (Recommended)
Use CFD software to simulate the flow pattern and confirm there are no dead zones or insufficient mixing.
4. Operation & Maintenance Tips
Regularly inspect cables, impellers, and bearings for wear;
Perform seal system maintenance every 6–12 months;
Avoid dry running to prevent motor damage.
Summary
Though small in size, submersible mixers are essential components in wastewater treatment systems. With proper selection, installation, and maintenance, they help improve treatment efficiency and system stability.
Contact Us for Technical Support and Quotation
Henan Eco Environmental Protection Equipment Co., Ltd.
Website: www.eco-watertechs.com
Email: info@ecowatertechs.com
WhatsApp: +86 15037320403
We specialize in R&D, manufacturing, and export of wastewater treatment equipment. Our products are trusted in over 30 countries worldwide.
