Summary of the Application of Jet Pumps in Hydropower Stations

Jet pump is a kind of fluid transport equipment without rotating parts. It has the advantages of simple structure, reliable operation, convenient maintenance and low cost. In recent years, it has been widely used in large and medium-sized hydropower stations at home and abroad, and has received good benefits. Related equipment is also called injection pump, ejector, etc.

Definition and characteristics:

1. No rotating parts, simple structure
2. Reliable operation and easy maintenance
3. Low cost, suitable for power station auxiliary system applications
4. Can be driven by using excess power fluid such as high-pressure water in front of the dam or in the volute

Application areas:

1. Technical water supply for hydropower station units
2. Removing sediment from water collection wells
3. High-pressure air system, phase-modulated pressurized water, air supply and water level maintenance in series

Technical water supply of unit:

One of the important applications of jet pumps in hydropower stations is unit technical water supply. Recent research results - needle valve adjustable jet pump, which has the advantages of high efficiency and wide working range, and is suitable for technical water supply systems of hydropower station units with large changes in water head and load.

For power stations with small head changes, fixed jet pumps can be used.

Draining mud from water collection wells:

In the drainage system, it is recommended to use a jet pump to remove sediment from the water collection well. Compared to mud pumps, jet pumps are more efficient and save electrical energy.

Series applications in phase-modulated pressurized water:

When using a high-pressure air system for phase-modulated water pressure, a jet pump can be connected in series in the high-pressure air system to suck in a certain amount of free air; and a jet pump can be used instead of a blower to maintain the reduced water level in the runner chamber.

This can not only obtain the best working parameters for phase-modulated water pressure, but also save investment and greatly simplify the layout of water pressure equipment and air pipe networks.

Key points for selection:

When selecting a project, a reasonable choice should be made between needle valve-adjustable and fixed jet pumps based on the range of changes in water head and load. In high-pressure gas systems such as phase-modulated water pressure, the comprehensive benefits of the jet pump's series air supply and water level maintenance can be further exploited.

Company information

Company Website: https://cd-greenwater.com
Technical Contact Number: 028-85130135
Customer Service Contact Number: 18515915124
Contact Email: jane1984@cd-greenwater.com
Address: No. 191, Section 1, Changcheng Road, Xihanggang, Shuangliu District, Chengdu City