The PNS series dredge pump being used for sand dredging and dike construction operations in the Yellow River in Heze City, Shandong Province China

Since the start of the sand blowing and land reclamation project in the Tancheng District of heze city in July 2017, it has taken 23 months for 24 villages to complete the task. A total of 82.4 million cubic meters of earthwork has been excavated, with 68.7 million cubic meters being sand blown and land filled. During the land reclamation period, the construction overcame various challenges, including the low sediment concentration in the Yellow River, frequent tearing of the river surface pipelines due to severe convective weather, sustained high flood discharge from the Yellow River, and the need to halt sand pumping operations. However, through measures such as increasing sand pumping pipelines, strengthening construction manpower, and minimizing maintenance time, the progress of the sand blowing and land reclamation project has been ensured.

The customer from Heze, Shandong, China ,visited your factory in November 2017 to inspect the dredge pump and presented the following construction requirements:

1.Sand extraction volume requirement: A daily sand extraction volume of over 5,000m³ is needed, with an estimated 10 hours of operation per day.

2.Long-distance transportation: The extracted sand needs to be transported over a distance of at least 6,000 meters.

3.High-voltage power at the construction site: There is high-voltage power at the construction site, so the dredge pump needs to operate safely and be compatible with high-voltage environments.

4.Conveying pipeline specification: ID 315mm diameter discharge pipeline is required for sand transportation.

According to the construction requirements provided by the customer from Heze, Shandong, China during their factory visit in November 2017, Based on the provided requirements, We recommend the following dredge pump model that can meet your needs. Here are some suitable features and functions:

5.High sand extraction efficiency: Choose a dredge pump model with high sand extraction efficiency to meet the daily requirement of over 5,000m³ of sand extraction.

Long-distance transportation capability: The selected dredge pump model is equipped with excellent long-distance sand transportation capabilities. It is specifically designed to efficiently transport sand over distances of 6,000 meters or more. With optimized hydraulic performance and robust construction, the pump ensures the smooth and reliable conveyance of sand particles over extended distances. This capability is essential for meeting the client's requirement of transporting sand over a distance of 6,000 meters, enabling efficient and effective sand transfer to the desired location.

High-voltage environment resistance: Choose a dredge pump that is designed to operate safely in high-voltage environments, ensuring its compatibility with the high-voltage power at your construction site.

Compatibility with specified pipeline specification: Ensure that the pump's outlet and inlet are compatible with the 315mm diameter conveying pipeline to ensure smooth sand transportation.

It is important to consult with the manufacturer or supplier to identify specific dredge pump models that meet these requirements and to ensure proper customization if needed.

Based on your requirements and on-site survey, the manufacturer's technical team has proposed the following selection scheme for the dredge pump:

Dredge pump selection for the dredging vessel:

Use the 350PNS-35 marine dredge pump equipped with an 8-pole 250kW electric motor and 300kW variable frequency starting cabinet. This dredge pump is suitable for extracting High-concentration sediment extraction: The selected dredge pump model, 350PNS-35, is specifically designed to handle high-concentration sediment. With its robust construction and efficient impeller design, it can effectively extract and transport high-concentration sediment. The pump has a working capacity of approximately 300 cubic meters of sand per hour, ensuring efficient and productive sand extraction operations.

In addition to the dredge pump, the IS150-125-400 high-pressure water pump is also selected. This pump is equipped with a 4-pole 37kW electric motor. Utilizing the principle of high-pressure jet suction, the high-pressure water pump enables the extraction of high-concentration sediment. It effectively dislodges and transports sediment by creating a powerful jet of water, enhancing the overall efficiency of sediment extraction.

By combining the dredge pump and high-pressure water pump, the equipment is well-equipped to handle the extraction of high-concentration sediment, ensuring efficient and effective sand dredging operations.

Relay pump selection: To facilitate installation and maintenance, two sets of 350PNS-35 marine dredge pumps are selected as relay pumps. These relay pumps are equipped with 8-pole 220kW electric motors and a 250kW variable frequency starting cabinet. By using the same pump model as the main dredge pump, it ensures consistency in performance and ease of maintenance.

Pipeline design: The dredging system will utilize a single pipeline that connects the three dredge pumps in series. This design enables the efficient transport of high-concentration sediment over a distance of 6,000 meters. The pipeline is carefully designed to handle the high-volume flow and abrasive nature of the sediment, ensuring smooth and reliable transportation throughout the dredging operation. The use of a single pipeline simplifies the system layout and enhances operational efficiency.

Pipeline material selection: The proposed selection scheme for the pipeline materials is as follows:

Suction pipeline for the dredging vessel: A 350mm rubber hose will be used for the suction pipeline. Rubber hoses are flexible, durable, and resistant to abrasion, making them suitable for the demanding conditions of suction operations.

Surface pipelines: HDPE (high-density polyethylene) pipes will be used for the surface pipelines. HDPE pipes are known for their excellent wear resistance and lightweight characteristics, making them an ideal choice for transporting sediment over long distances. They are also corrosion-resistant, ensuring the longevity of the pipeline system.

Relay pump section: Seamless steel pipes will be used for the relay pump section. Seamless steel pipes provide high strength, low resistance, and strong wear resistance, making them suitable for transferring the pumped sediment between the relay pumps.

This selection scheme takes into account on-site surveys and past experience to ensure that the chosen pipeline materials meet the specific construction requirements in Heze. The combination of rubber hose, HDPE pipes, and seamless steel pipes provides a reliable and efficient pipeline system for the dredging operation.

This PNS marine dredge pump is a product jointly designed and developed by Tai'an Ocean Pump Co., Ltd. and experts from the Yellow River Water Conservancy Commission. It is specifically intended for desilting and sand extraction projects in the Yellow River basin and also features the function of relay boosting pump.

1.Material : Using the cast iron ,cast steel or high wear resistant and strong corrosion resistance chrome alloy to make the over -flow part .

Long-term bearing life: The dredge pump incorporates a bearing assembly that is designed for long-term durability. It features a large diameter shaft and a short overhang, which helps to minimize shaft deflection and prolong the lifespan of the bearings. This design ensures reliable and efficient operation of the pump over an extended period.

Distinctive innovation in hydraulic and structural design: The dredge pump showcases distinctive innovations in both hydraulic and structural design. These innovations are aimed at optimizing the pump's performance and efficiency. The hydraulic design ensures efficient flow characteristics, while the structural design enhances the pump's overall strength and reliability. This combination of innovative designs ensures superior performance in various dredging applications.

Large dredging depth, high density of dredging mud, good NPSH, and strong suction lift ability: The dredge pump is capable of operating in challenging dredging conditions. It can achieve a large dredging depth, effectively handle high-density dredging mud, and maintain good NPSH (net positive suction head), which is crucial for efficient suction performance. Additionally, the pump exhibits strong suction lift ability, enabling it to effectively extract sediment from substantial depths.

Wide range of applications: The dredge pump is versatile and suitable for various applications. It can be used for sand suction and dredging operations, extracting mud for ships, marine reclamation projects, wharf construction, electric power generation, and metallurgical industries. It is also utilized in the coal washing industry for filtering coal slime. Its adaptability and versatility make it a valuable asset in multiple industries.

Impressive performance specifications: The dredge pump offers exceptional performance capabilities. It can achieve a suction depth of up to 35 meters underwater, a discharge head of up to 60 meters, and a discharge distance of up to 1000-1500 meters without the need for a boost pump. Furthermore, it is capable of handling gravel sizes up to 80mm, making it suitable for various dredging applications that involve substantial sediment and solid particles.

The marine dredge pump exhibits excellent sand dredging efficiency and effectively extracts sand particles from riverbeds or water bodies. It incorporates advanced pump technology and design, offering powerful sand dredging capabilities and an efficient hydraulic transmission system to adapt to various working conditions and types of sand. The pump's design takes into consideration the special environment and requirements of marine vessels, ensuring good corrosion resistance and reliable performance.

High sand dredging efficiency: The dredge pump is equipped with specially designed impellers and a pump casing structure that enables it to effectively extract a large amount of sand particles. This design significantly improves the efficiency of desilting and sand extraction operations, ensuring swift and productive sediment removal. By maximizing the pump's ability to handle high concentrations of sand, it minimizes downtime and maximizes the overall productivity of the dredging process. This feature is crucial for meeting the demanding sand extraction requirements of over 5,000m³ per day, ensuring that the project progresses smoothly and meets the client's needs.

Relay boosting function: In addition to sand dredging operations, the pump can also provide boosting support to other pumps or systems when needed, ensuring stable water flow and increased flow rate.

Strong corrosion resistance: The pump body and key components are made of corrosion-resistant materials, allowing it to work for extended periods in harsh water quality and environmental conditions, thus ensuring a longer service life.

Convenient operation: The pump is designed for easy operation, allowing for convenient installation on vessels. It can also be remotely controlled and monitored through a control system, enhancing operational convenience and safety.

The dredge pump is widely used in the Yellow River basin due to its high efficiency, energy-saving properties, long-distance conveying capabilities, and other advantages.

Great! It's good to hear that the customer from Heze has confirmed and approved the pump selection scheme, and has placed an order for 6 sets of marine dredge pumps for the two pipelines. Here are the parameters and relevant information for the marine dredge pump:

Pump Model: 350PNS-35 Marine Dredge Pump

Flow Rate: 1800 cubic meters per hour

Head: 35 meters

Matching Power: 220-250 kW

Matching Electric Motor: 8-pole 220 kW-250 kW

The manufacturer has promised to deliver the pump units to the site within 10 days upon contract signing. With ample spare parts and efficient work efficiency, the manufacturer will ensure the timely, high-quality, and quantity-assured preparation and delivery of the goods to the site, ensuring the smooth progress of the project timeline.

OCEAN Pump is the brand name of Tai¡¯an Ocean Pump Co., Ltd. As the New Hi-tech Enterprise Certificated by the Government. Tai¡¯an Ocean Pump (OCEAN Pump) Co., Ltd. is the leading slurry pump manufacturer and supplier in China. We have more than 30 talented sand pump experts and 15,000 square meters factory. More than 4 series 20 kinds of sand pumps, slurry pumps, dredge pump sand dredgers and related parts had been manufactured to satisfy your pumping requirements. Product innovation and customer satisfaction are our continuous commitment to all our partners. We had always worked harder to become the leader in supplying the sand, slurry, gravel pumping and dredging solutions and related parts.

Our main products include Sand pumping equipment, simple sand pump, marine sand pump, heavy duty slurry pump, sand and gravel pump, mud pump, submersible slurry pump, dredge pump, mining pumps, sand dredging pumps, small dredging equipment, sand pump dredger, dredger ship, submersible dredge, suction dredger, cutter dredger, mechanical cutter suction dredger, hydraulic cutter suction dredger, dredging equipment and other parts like discharging sand pipe, floater, rubber hose. They are widely used in mining, metallurgy, coal washing, power plants, sewage water treatment, dredging, chemical and petroleum industries.