The Importance of Sewage Pumps

Sewage pumps are specialized equipment designed for the disposal of various types of wastewater, widely used in municipal, industrial, and agricultural settings. They play a crucial role in sewage systems.

I. Working Principle

They primarily operate based on the principle of centrifugal force. An electric motor drives the impeller to rotate at high speed, creating a low-pressure area at the center which allows sewage to be drawn into the pump chamber under atmospheric pressure. The sewage is then expelled towards the edge of the impeller into the volute passage due to centrifugal force. As the flow passage widens, the water velocity decreases, with kinetic energy converted into pressure energy, and the sewage is ultimately discharged under pressure to complete the transportation. Unlike ordinary clean water pumps, sewage pumps have wider impellers and volute passages, some equipped with cutting devices to handle impurities within the sewage, preventing blockages.

II. Types of Sewage Pumps

1.Classified by usage method:

• Submersible pumps: The motor and pump body are integrated, capable of working directly submerged in sewage without additional priming devices. Installation is convenient, suitable for deep sewage environments such as municipal sewage wells and industrial wastewater ponds.
• Dry pumps (horizontal/vertical): The motor and pump body are separate, installed above ground or in dry areas, connected through a drive shaft. Maintenance is relatively simple, ideal for transporting sewage without large amounts of sticky impurities, commonly used in pipeline conveyance systems at wastewater treatment plants.

2.Classified by structural principles:

• Centrifugal pumps: Utilize the centrifugal force generated by the high-speed rotation of the impeller to transport sewage. They feature large flow rates, a wide range of heads, and a simple structure, making them one of the most widely applied types, suitable for urban sewage treatment, industrial wastewater discharge, etc. However, for sewage containing larger particle impurities, cutting devices need to be equipped.
• Screw pumps: By meshing screws with liners to form sealed chambers, they continuously push sewage. They possess strong self-priming capabilities and anti-clogging properties, suitable for transporting sewage containing fibers, sludge, and other sticky impurities, like printing and dyeing wastewater, food processing sewage, etc.

III. Key Factors in Selecting Sewage Pumps

Firstly, consider the solid content and particle diameter of the sewage to determine the material of the pump's flow-through components (e.g., high-chromium cast iron is suitable for high-wear scenarios); secondly, the head and flow rate requirements must match the calculation results of conveying distance and pipeline resistance; additionally, installation conditions are also important—submersible types are suitable for confined spaces, while self-priming types are more convenient for mobile operations; finally, explosion-proof ratings should be determined based on whether the sewage contains flammable and explosive gases to ensure safe production.

IV. Application Areas of Sewage Pumps

In the field of wastewater management across industries, sewage pumps play an irreplaceable role:

• In municipal wastewater treatment plants, they are used to convey screened sewage to sedimentation tanks, ensuring stable operation of subsequent biochemical treatment processes;
• In chemical industry parks, corrosion-resistant models can transport acidic and alkaline industrial wastewater to avoid pipeline corrosion and leakage;
• At construction sites, temporary sewage pumps can quickly drain pit water, combined with mud separators to achieve water recycling.

Ⅴ.Summary

In the domain of wastewater management, sewage pumps boast strong impurity handling capability, high efficiency, and excellent adaptability to complex sewage environments, playing a core role in municipal sewage treatment, industrial wastewater discharge, and other scenarios. TEFFIKO is a professional manufacturer and supplier who, after 20 years of manufacturing and research, has consolidated its long-standing leading position in the global industrial pump market. Choosing Teffiko pumps means you are investing in a complete and reliable overall solution—from core equipment to key accessories—and a long-term partner and technical support you can trust. If you are interested in our products, you may consult TEFFIKO immediately, and we will respond promptly.