Jet suction dredger and submersible pump dredger are crucial equipment extensively employed in dredging projects, as well as sand and mining extraction. This comprehensive article aims to offer a detailed analysis of these devices regarding their product structure, advantages, disadvantages, cost considerations, and application scenarios. By comparing and contrasting these aspects, it will provide professional recommendations for selecting the most suitable equipment. Understanding the distinctions between these two dredging options is vital for making informed decisions and ensuring the effectiveness and efficiency of dredging operations in various contexts.

1. Dredger structure:

1.1 Structure of Jet Suction Dredger:

Jet suction dredger is high-efficient machine used for maintaining harbors and channels, reclaiming land, environmental remediation, reservoir maintenance, mining excavation, and deepening waterways. They use high-pressure water jets to loosen sediments, which are then suctioned up for removal.

The main parts of jet suction dredger is as below:

Dredger hull:

Dredger hull including middle hull (pump compartment), side pontoon(optional), gantry, etc. The hull adopts a steel structure as the main body, which has high strength and corrosion resistance, and can adapt to various water environments and working conditions.

Power system:

The middle compartment is equipped with a diesel engine or electric motor as the power source, which is used to drive sand suction pumps and high-pressure water pumps. The power system is connected to the pump device. The floating platform is mainly used for medium suction in fixed areas, and can also be configured with a hanging propeller according to customer requirements to move in water. Generator sets can also be used to provide power for equipment such as winches.

Extraction equipment:

The core part is the extraction equipment, including sand suction pump, flushing pump, sand suction head, and pipeline system. The sand suction pump is responsible for suction of water and sediment, while the flushing pump impacts the sediment underwater and suspends it in the water. The medium is then fed into the sand suction pump through the suction head. The pipeline system transports suspended sediment to designated locations.

1.2 Stucture of Submersible Pump Dredger:

Submersible pump dredger is a type of dredger equipped with a submersible slurry pump. It usually includes a submersible slurry pump, winch system, power system, and pipeline system.

The submersible pump ship is immersed in water through a winch steel wire rope and controls the lifting of the pump. During the operation of the slurry pump, water and sediment are sucked into the pump and then transported to the target location through pipelines.

2. Features:

2.1 Features of Jet Suction Dredger:

Advantages:

High production capacity: Jet suction dredger has strong suction capabilities and can handle large amounts of sediment.

Strong adaptability: the suction dredger can be used for various dredging projects, including channel maintenance, land backfilling and mudflat replenishment.

Good effect on soft soil: Jet suction boats are very effective in dredging loose and fine-grained sediments.

Low environmental impact: During the suction process, the suction boat usually mixes the dredged material with water, making it easy to transport and reducing its impact on the surrounding ecosystem.

Disadvantages:

The treatment effect is not good for high viscosity or tight sediments such as clay.

2.2 Features of Submersible Dredge Pump Dredger:

Advantages:

Easy to operate: It can enter areas that are difficult for other types of dredging equipment to reach.

Precise control: Submersible pump dredger can better control the dredging process and achieve precise removal of sediment.

Portability: Submersible pump dredger is smaller than large dredging vessels, easy to transport, and suitable for small projects or areas with limited space.

Low noise: The submersible slurry pump operates underwater, so the working environment noise is relatively low.

Deep water extraction: With technological innovation, OCEAN submersible slurry pumps have reached depths of over 100 meters. Therefore, for some working environments with deep water depths, OCEAN submersible pump dredger is an economical and effective equipment choice.

Multifunctionality: Submersible pump dredger can be used for various applications, including maintenance of small waterways, ponds, and lakes, as well as sand extraction from the sea.

Disadvantages:

The ability to handle large amounts of sediment is relatively small.

There may be difficulties in handling large pieces of material.

3. Cost considerations

Under the same working conditions and production capacity, there is not a significant difference in cost between a suction ship and a submersible pump ship. Their main cost difference lies in the brand or material selection of major components such as power systems and sand pumps.

4. Application：

4.1 Application of Jet Suction Dredger:

Maintenance and dredging of waterways and ports.

Land backfilling and mudflat replenishment project.

The dredging and water quality improvement of rivers and lakes.

Extract underwater resources such as riverbed, seabed sand, gravel, and minerals.

4.2 Application of submersible pump dredger:

The dredging and maintenance waterway, such as small rivers, lakes, ponds, and greenhouse water bodies.

Cleaning of sediment and sludge in industrial and municipal water bodies.

Sediment treatment for aquaculture farms.

Maintenance of small waterways and channels.

5. How to make a choice？

When choosing a jet suction dredger or submersible pump dredger, the following factors need to be considered:

Project requirements: Evaluate specific dredging requirements, including the amount of sediment to be dredged, sediment types, and expected productivity.

Soil conditions: Jet suction boats are suitable for handling loose or fine-grained sediments, while sticky or tight sediments such as clay may require other methods.

Environmental considerations: Assess the impact of dredging operations on the environment and select dredging equipment with minimal disturbance to the ecosystem.

Budget and availability: Consider equipment costs, available dredging vessels, and overall project budget.

In summary, jet suction dredgers have advantages such as high production capacity and good treatment effect on loose soil or sand slurry, while submersible pump dredgers have advantages in requiring a quiet working environment, deep water extraction, and precise control of sediment. When choosing jet suction dredgers or submersible pump dredgers, a comprehensive evaluation needs to be conducted based on factors such as project requirements, soil conditions, environmental considerations, and budget.

Contact with us for more details:
Sally Peng

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Email: oceanpump2@tsbeng.com, sales@sanddredgers.com