A jet suction dredger is an engineering vessel or equipment that uses the negative pressure (vacuum) generated by high-speed water flow to extract underwater sediment. This hydraulic dredging method is particularly suitable for dredging and sand extraction in shallow water, on a small scale, or in specific scenarios.

Note: The above technical parameters are for reference only. Specific device configuration depends on the conditions of each project, customer and technical requirements.

Jeting: Loosening mud and sand with high-pressure water jets

• The vessel is equipped with a high-powered high-pressure water pump
• The pump draws clean water from the operating area, pressurizes it, and delivers it underwater through a high-pressure water pipe
• A specially designed nozzle directs the high-pressure water onto the target sand layer
• Function: The high-pressure water jet has a powerful impact force that can disperse loose sand particles and cut/liquefy compacted mud and sand layers
• Creates a sand-water mixture (slurry) with reduced viscosity for easier pumping

Suction: Suctioning the slurry with a centrifugal pump

• A sand suction head is located near the high-pressure nozzle
• The vessel is equipped with a centrifugal sand pump (or slurry pump)
• The sand pump generates powerful vacuum suction to draw in the sand-water mixture
• The slurry is transported via pipelines to its destination (transport vessel, storage yard, or floating tank)

1. Position the vessel at the target area
2. Start the water pump to establish a high-pressure water flow
3. Lower the jet pipe and sand suction pipe, placing the suction head on the sand surface
4. High-pressure water is ejected at high speed through the nozzle, creating negative pressure
5. The sediment-water mixture is drawn into the sand suction pipe due to the pressure differential
6. The mixed slurry is pumped through the sand discharge pipe to the designated location
7. Sand extraction is completed step by step by moving the vessel or adjusting the suction head position