Electric waste water pumps are vital in environmental management, especially in handling excess water in homes, industries and municipal systems. They effectively remove polluted or excess water, maintaining hygiene and preventing damage. Understanding the inner workings, key components and processes of electric wastewater pumps can help you gain a deeper understanding of their operating mechanisms.

Intake

The process of wastewater passing through an electric pump begins at the intake stage. Water is drawn into the pump through a specially designed inlet, and the suction created by the pump draws the water away from the source.

Electric waste water pumps are often equipped with filters or screens at the inlet to prevent large debris, solids or foreign matter from entering the pump, protecting the pump and maintaining its efficiency and life.

The size and design of the inlet varies depending on the specific application and type of wastewater. Pumps that handle sewage or heavily contaminated water may have a larger inlet, while pumps that handle relatively clean water may have a smaller inlet with a more elaborate design.

Impeller And Centrifugal Force

When wastewater flows into the pump body through the water inlet, it contacts the core component of the pump - the impeller. The main responsibility of the impeller is to push the water flow through the entire pump body and finally deliver it to the designated location. This component is usually driven by an electric motor to rotate to form a power source.

When the impeller rotates, it generates centrifugal force, which makes the water in the pump move. Here's how it works:

The motor starts, and the impeller rotates. During the rotation, the pressure in the middle of the impeller is low, and the pressure on the edge is high, forming a pressure difference. Because of this pressure difference, water is sucked into the middle of the impeller. The centrifugal force pushes the water from the middle of the impeller to the edge. During this process, the speed and pressure of the water flow will gradually increase, and finally flow out of the pump.

The impeller design is divided into two types according to different requirements: closed (with shroud) and open. Some pumps may use closed impellers, whose blades are covered by shrouds; while some pumps may use open or semi-open impellers. When choosing, factors such as liquid viscosity, solid content and required flow rate should be considered.

Discharge

The final stage of an electric waste water pump’s operation is discharge. The impeller accelerates the water and builds pressure, forcing the liquid out through a discharge port, which is usually connected to a pipe or hose to direct it to a treatment facility, drainage system, or other destination. Discharge ensures that wastewater is effectively discharged and transported to the designated location. The pressure generated by the impeller helps the pump overcome gravity, pipe friction, etc., to achieve long distances and high altitudes.

Many electric wastewater pumps have the following features to optimize discharge:

Check valves: Prevent water from flowing back when the pump is not operating, maintaining system efficiency.

Pressure sensors: Monitor discharge pressure, allowing automatic adjustments to maintain performance.

Variable frequency drives (VFDs): Regulate pump speed based on flow, improving energy efficiency and reducing wear.

Pump displacement is expressed in gallons per minute (GPM) or liters per minute (LPM), and total dynamic head is a key factor in selecting the right pump for the application.

Conclusion

Tianjin Kairun Pump Co., Ltd. is a preferred supplier in the field of electric waste water pumps, focusing on product research and development, manufacturing, project modification and non-standard product customization. The pumps we produce are all certified by ISO 9001, CE and RoHS to ensure excellent quality and performance. If you have a need for electric wastewater pumps in your project or facility, please contact us by email at catherine@kairunpump.com, and we will provide you with a tailor-made wastewater management pumping solution.

References

1.Grundfos. (2021). "The Pump Handbook." Grundfos Research and Technology.

2.Hydraulic Institute. (2020). "Pump Systems Matter: Energy Efficiency and Management Guide."

3.Tschopp, J. (2019). "Wastewater Pumping Systems: Design and Operation." Water Environment Federation.

4.Karassik, I.J., et al. (2018). "Pump Handbook." McGraw-Hill Education.

5.Environmental Protection Agency. (2022). "Wastewater Technology Fact Sheet: Sewers, Conventional Gravity."

6.American Water Works Association. (2021). "Water Treatment Plant Design." McGraw-Hill Education.

7.Metcalf & Eddy. (2017). "Wastewater Engineering: Treatment and Resource Recovery." McGraw-Hill Education.