What are the Most Popular Dredging Methods?
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1.?Introduction:
Dredging refers to the process of removing materials from water body with dredging vessels, and transferring them to another location. Dredging plays a crucial role in the development, utilization, and maintenance of water areas.
This article will focus on the two most popular dredging methods: suction dredging and cutter suction dredging.
2.?Common Dredging Methods:
3. In this article, we will focus on suction dredging and cutter dredging:
3.1 Suction Dredging:
Principle of Suction Dredging:
Suction dredgers function like high-power underwater vacuum cleaners. The core component is a dredge pump driven by a diesel engine or motor. The pump generates centrifugal force through rotation, sucking slurry and sediment from the water body's bottom into the pump, and discharging it through pipelines to a designated location.
Applications of Suction Dredging:
Suction dredging is commonly used in small to medium-sized projects such as river sand mining, gold extraction, reservoir desilting, etc. Its flexibility and versatility make it an ideal choice for various dredging requirements.
3.2 Cutter Suction Dredging:
Principle of Cutter Suction Dredging:
Cutter suction dredgers have an additional rotating cutterhead on top of a standard suction dredger. This cutting head is effective in breaking up compact materials under water, which are then suctioned and pumped out.
Applications of Cutter Suction Dredging:
Cutter suction dredgers can handle a wide range of materials and are suitable for various applications. Due to their larger size and powerful processing capabilities, they are mainly used in large-scale sand mining, dredging operations, and port deepening projects that involve complex dredging requirements.
4. OCEAN PUMP Jet Suction Dredgers, Submersible Pump Dredgers, and Cutter Suction Dredgers:
4.1 Jet Suction Dredger:
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OCEAN PUMP jet suction dredgers are equipped with a horizontal centrifugal pump, usually driven by a diesel engine. The selection of the dredge pump is crucial, as it is a core component of the dredger. The pump parameters need to be calculated based on working conditions, customer requirements, and factors such as cost and pipeline configuration.
Additionally, jet suction dredgers are equipped with a high-pressure jetting pump. The jetting pump creates high pressure water to impact on the solid layer, splashing sediment and increasing the concentration around the suction head.
jet suction dredgers usually can achieve a maximum dredging depth of 35 meters. The vessel has a relatively small size and a modular design for easy transportation. It has low overall costs, requires small investments, and provides quick returns, making it a top choice for many sand mining clients.
4.2 Submersible Pump Dredger:
OCEAN PUMP submersible pump dredgers are equipped with a submersible dredge pump. The pump and motor are coaxial. The pump will be submerged in water during work. The dredgers have the advantages of low noise and minimal pollution. OCEAN PUMP submersible dredge pumps, known for their technical superiority and long service life, are commonly used in offshore submersible dredge vessels.
With technological advancements, submersible dredge pumps from OCEAN PUMP can achieve a maximum extraction depth of 150 meters. Compare with horizontal dredging pumps, They offer unique advantages to achieve deeper dredging depth.
OCEAN PUMP submersible pump dredgers are widely used in mining, dam and canal desilting, deep-sea sand collection, and dredging projects.
4.3 Cutter Suction Dredgers:
Cutter suction dredgers are multifunctional dredging vessels that combine suction and cutter functions. They have powerful cutting and crushing capabilities, allowing them to handle various complex bottom materials. Cutter suction dredgers are typically equipped with dredge pumps and rotating cutterheads, enabling efficient dredging and processing of sludge, rocks, and other materials.
5. Common Features of these Dredging equipment:
Versatility: Suction dredging and cutter suction dredging can handle a wide range of materials, from fine sediments to rocks and compacted materials.
Efficiency: Both methods are highly efficient in extracting and transporting dredged materials, allowing for faster project completion.
Flexibility: Suction dredging and cutter suction dredging can be adapted to different dredging requirements and project sizes.
Precision: The precision of these methods allows for accurate dredging in specific areas without disturbing the surrounding environment.
Environmental Considerations: Both methods have made advancements in reducing their environmental impact, such as implementing sediment control measures and using eco-friendly hydraulic fluids.
6. Conclusion:
Suction dredging and cutter dredging are very popular dredging methods widely used in various dredging projects. Suction dredging is suitable for smaller-scale projects, while cutter suction dredging is preferred for larger-scale operations. Both methods offer efficiency, versatility, and precision, making them essential tools in maintaining waterways, extracting resources, and supporting infrastructure development. As technology continues to advance, we can expect further improvements in these dredging methods to enhance their performance and minimize their environmental impact.
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