There exist various types of centrifugal sand suction pumps, which encompass horizontal, vertical, and submersible designs in their structures. They serve diverse functions, including gravel pumping, slurry handling, and heavy-duty dredging tasks. The selection of a specific sand suction pump type depends on the dredging conditions, aligning with the pump’s inherent structural features. It is not uncommon for different sand suction pumps to collaborate within a singular project to execute the dredging process efficiently.
In recent times, prompted by national environmental conservation initiatives, systematic environmental remediation efforts have been underway. Instances of such endeavors involve activities like river and fish pond dredging, expansion of industrial operations, and cleaning of sedimentation tanks. Dredging stands as a vital facet of water resource management. Typically, the accumulated sediment is agitated into a muddy slurry through mechanical means, predominantly employing centrifugal sand dredge pumps. Subsequently, this slurry is conveyed to designated disposal sites via the impeller-driven motion of the sand pump, accomplishing the objectives of dredging and cleansing. The widespread adoption of centrifugal sand dredge pumps in dredging projects can be attributed to their efficiency, cost-effectiveness, and operational flexibility. They find extensive utilization in diverse dredging undertakings such as river and pond restorations.
The utilization of centrifugal sand dredge pumps in dredging initiatives typically involves various methods for pump deployment and operation. These may include employing a combination of grab buckets and dredge pumps, utilizing both vertical and horizontal dredge pumps in tandem, or integrating dredge pumps with specialized dredging vessels. Such versatile applications underline the pivotal role played by centrifugal sand dredge pumps in ensuring the success of dredging projects.
1.River Dredging Construction Preparations
Prior to embarking on a river dredging project, meticulous preparations are essential to ensure its successful execution. The construction company must enlist skilled professionals to conduct a comprehensive survey of the construction site, accurately assessing the volume of work to be undertaken. Construction drawings play a critical role in providing crucial details regarding the project’s duration, equipment requirements, and auxiliary tasks. In river dredging operations, the utilization of centrifugal sand dredge pumps holds paramount importance, while bulldozers and excavators serve as vital auxiliary equipment. Construction teams must pay close attention to the following key considerations:
1.1 Understand Construction Drawings
Familiarize oneself with the construction drawings, encompassing details such as the river’s cross-section, water quality, and slurry composition.
1.2 Bridge Load-Bearing Assessment
Conduct a thorough evaluation of any bridges on the construction site to gauge their load-bearing capacity, which is crucial for selecting appropriate equipment.
1.3 Ensure a Stable Power Supply
Verify the provision of a stable power supply at the site, often facilitated by nearby water stations. Take into account the direction and distance of transmission lines during installation.
1.4 Water Source for Operations
Opt for using the original river water as the primary source for slurry construction to promote the recycling of water resources.
1.5 Location of Slurry
Define the specific locations for depositing slurry within the river, taking into consideration the site’s topography.
1.6 Selection of Dredging Method
Choose an appropriate dredging and construction process, factoring in the positioning of the construction shed.
2. River Dredging Construction Plans: Vertical Sand Pump for River Channel Dredging
In river channel dredging, a primary method involving high-pressure water jetting combined with manual excavation is typically employed for earthwork construction. This method utilizes a high-pressure water jetting unit comprising a high-pressure pump, vertical slurry pump, and an electric power control system. This equipment is characterized by its lightweight nature, facilitating easy assembly, disassembly, and manual transport. By mimicking the erosion caused by natural water flow, this technique effectively cuts and crushes soil using high-pressure power. The high-pressure pump generates a water flow that is directed through a water gun, creating a muddy mixture. Subsequently, the slurry pump transports this mixture to a designated spoil area for sedimentation, thereby completing various earthwork processes.
3. Characteristics of Vertical Centrifugal Sand Dredge Pump
- Operates on a simple mechanical principle, ensuring easy installation and operation.
- Offers a low equipment purchase cost and overall investment.
- Features an open impeller design that enables the extraction of mud, debris, and large particles without impeding the flow.
- Operates below the water level, eliminating the need for water injection, thereby enhancing suction capacity and concentration.
- Incorporates wear-resistant materials in over-current parts, bolstering durability and extending service life.
4. Configuration of Dredgers Centrifugal Sand Dredge Pump
Medium and large dredgers are typically equipped with two dredge pumps—one for suction and the other for discharge. The suction pump has a larger flow rate to provide faster flow and greater driving force for the slurry suction. The dredge pump is selected based on higher head requirements for long-distance transportation. A dedicated underwater dredge pump is often installed for deeper dredging depths, working in conjunction with the discharge pump in the cabin. Small dredgers usually have a single sand pump responsible for both suction and discharge. When selecting dredgers, the COSCO technical team provides customized solutions for centrifugal sand dredge pumps, including drive systems, hydraulic systems, control systems, etc., based on specific customer needs and equipment configuration requirements.
5. Main Features of the Dredge Pump
- Excellent cavitation performance and strong suction capacity, allowing for greater digging depth and higher suction concentration.
- Overflow parts are made of CR28 anti-abrasion alloy material with high hardness (greater than HRC60), toughness, and corrosion resistance, ensuring a long service life.
- Equipped with auxiliary facilities such as a bearing lubrication system, shaft sealing water system, sand water separator, and electric cranking system for smooth operation.
- Front disassembly structure design with special tools for easy maintenance and disassembly.
- Dredgers have a wide range of applications, can achieve deep excavation depths and high suction concentrations. However, they are expensive to use and maintain. Many dredging projects have low bid prices, making it impractical to employ dredgers for operations.
Conclusion
Different operating conditions use different operating methods, but the only constant core equipment is the centrifugal sand dredge pump. The impact of the high-pressure water pump and the stirring of the stirring device are to better assist the sediment pump in the dredging operation. Vertical, horizontal, submersible and different structure dredge pumps are widely used in construction sites at home and abroad.
Taian OCEAN Pump has focused on the production of sediment pumps for 20 years, especially in dredging, sand mining, and embankment consolidation, and has extensive experience. We can not only provide high-quality products and overall industry solutions, but also provide on-site installation services. If you have any needs, please feel free to contact us.
