Do you know about electric pumping station?

1. Basic structure and composition

The core components of the electric pump station include:

Water pump

Type: centrifugal pump, axial flow pump, mixed flow pump, etc., selected according to needs.

Material: cast iron, stainless steel or engineering plastics, adapted to different liquid properties.

Motor

Type: asynchronous motor (commonly used), synchronous motor (high efficiency) or variable frequency motor (energy saving).

Power: usually 1kW to 1000kW, matched according to water pump needs.

Control system

Function: start-stop control, flow regulation, fault protection (such as overload, phase loss, dry run).

Type: manual control, automatic control (PLC or SCADA system).

Auxiliary equipment

Inlet and outlet pipes: usually steel pipe, PVC or HDPE material, pressure and corrosion resistance.

Valve: including gate valve, check valve, regulating valve, etc., used to control flow and pressure.

Filter: prevent impurities from entering the water pump and extend its service life.

Water storage facilities: such as water tanks or pools, used to regulate water supply and storage.

2. Working Principle

The working principle of the electric pump station is based on the conversion of electrical energy into mechanical energy, and then the liquid is transported to the designated location through the water pump.

Electric energy → mechanical energy

When the motor is powered on, it generates a rotational torque, driving the water pump impeller to rotate at high speed.

Liquid transportation

Centrifugal pump: The rotation of the impeller generates centrifugal force, which throws the liquid from the center to the edge, forming low-pressure suction and high-pressure discharge.

Axial flow pump: The impeller pushes the liquid to flow along the axial direction, which is suitable for large flow and low head scenarios.

Mixed flow pump: Combining the characteristics of centrifugal pumps and axial flow pumps, it is suitable for medium flow and head.

Control system

Adjust the operating status of the water pump according to demand, such as flow, pressure and start and stop time.

3. Main types

By use

Water supply pump station: used for urban water supply and rural drinking water projects, usually equipped with centrifugal pumps.

Drainage pump station: used for urban drainage and sewage treatment, usually equipped with axial flow pumps or mixed flow pumps.

Irrigation pump station: used for agricultural irrigation, usually equipped with large flow centrifugal pumps.

According to the control method

Manual pump station: simple operation, low cost, suitable for small projects.

Automatic pump station: equipped with PLC or SCADA system to achieve remote monitoring and intelligent control.

According to the installation method

Ground pump station: installed on the ground, easy to maintain, suitable for shallow water sources.

Underground pump station: installed underground, saves space, suitable for urban drainage or water supply.

IV. Core performance indicators

Flow (Q)

Definition: The volume of liquid delivered by the pump per unit time, in cubic meters per hour (m³/h) or liters per second (L/s).

Example: The flow rate of a pump station is 1000m³/h, which means that 1000 tons of water can be delivered per hour.

Lift (H)

Definition: The maximum vertical height to which the pump can lift the liquid, in meters.

Example: A pump with a lift of 50 meters can deliver water to a height of 50 meters.

Power (P)

Definition: The output power of the motor, in kilowatts (kW) or horsepower (HP).

Example: A 100kW motor can drive a pump with a flow rate of 500m³/h and a head of 30 meters.

Efficiency (η)

Definition: The ratio of the input power converted to output power by the pump, usually expressed as a percentage.

Example: The efficiency of a high-efficiency pump can reach 85%-92%, while that of an inefficient pump is only 60%-70%.

Operating pressure

Definition: The liquid pressure at the outlet of the pump, in megapascals (MPa) or bar.

Example: The operating pressure of a pump station is 0.6MPa, which can meet the water supply needs of high-rise buildings.

V. Application scenarios

Urban water supply

Applicable pump type: centrifugal pump, flow rate 100-1000m³/h, head 50-200 meters.

Case: A city water supply pump station is equipped with 4 centrifugal pumps, with an average daily water supply of 100,000 cubic meters.

Agricultural irrigation

Applicable pump type: large flow centrifugal pump, flow rate 500-5000m³/h, head 20-50 meters.

Case: An irrigation pump station serves 5,000 mu of farmland, pumping 20,000 cubic meters of water per day.

Sewage treatment

Applicable pump type: axial flow pump or mixed flow pump, flow rate 1000-10000m³/h, head 5-20 meters.

Case: A sewage treatment plant pump station is equipped with 6 axial flow pumps, treating 50,000 cubic meters of sewage per day.

Industrial circulating water

Applicable pump type: corrosion-resistant centrifugal pump, flow rate 100-1000m³/h, head 30-100 meters.

Case: A chemical plant circulating water pump station is equipped with a stainless steel centrifugal pump, with an average daily circulating water volume of 10,000 cubic meters.

VI. Selection Guide

Clear requirements

Determine the flow rate, head, liquid properties (clean water, sewage, corrosive liquid) and use environment (temperature, altitude).

Matching parameters

Select the appropriate pump type and motor power according to the requirements.

Example: Irrigation of 1,000 mu of farmland requires a flow rate of 500 m³/h and a head of 30 meters. A 75kW centrifugal pump can be selected.

Consider the control system

For scenarios with high automation requirements, choose a pump station equipped with a PLC or SCADA system.

VII. Maintenance and care

Daily inspection

Check the motor temperature, vibration and noise to ensure normal operation.

Clean the filter to prevent clogging.

Regular maintenance

Replace lubricating oil and seals every 1,000 hours of operation.

Check the wear of the pump impeller and replace it if necessary.

Long-term storage

Drain the liquid in the pump body to prevent freezing or corrosion.

Store the equipment in a dry and ventilated place to avoid rust.

VIII. Advantages and limitations

Advantages

High efficiency and energy saving: motor drive, high energy conversion efficiency.

Environmental protection and pollution-free: no exhaust gas emissions, low noise.

High degree of automation: remote monitoring and intelligent control can be achieved.

Limitations

Depend on electricity: cannot operate during power outages, and backup power is required.

High initial investment: high cost of equipment and control system.