1.What is Submersible Dredge Pump

A submersible dredge pump is a specially designed submersible pump that is specially used to transport slurry containing solid particles underwater or in liquid. The pump is mainly composed of motor, pump body, impeller, sealing system and other components, and has many unique properties. First of all, it can be completely submerged in liquids without external suction, so it is suitable for operations in deep water environments. Secondly, the submersible dredge pump is specially designed and optimized for media containing solid particles such as slurry, sand, mud, gravel, etc. It can efficiently transport such viscous liquids, has good wear resistance, and is made of wear-resistant materials. . The working principle of the submersible dredge pump is to use a motor to drive the impeller to rotate, generating centrifugal force to suck the medium in and discharge it through the pump body. At the same time, the sealing system ensures that the medium does not leak into the inside of the motor. submersible dredge pumps provide efficient and reliable solutions for solid particle handling and slurry transportation.
For long-distance transportation projects, submersible dredge pumps need to comprehensively consider multiple factors to achieve long-distance transportation. Featuring a compact submersible design, high power and efficient energy conversion capabilities to overcome large vertical distances and pipeline resistance. OCEAN Pump can achieve successful long-distance transportation by optimizing the pipeline system, selecting appropriate pump power and pressure capabilities, equipping control and monitoring systems, and using high-lift booster pumps. At the same time, it is also necessary to consider factors such as the characteristics of the transmission medium, the content and size of solid particles, and select the appropriate submersible dredge pump and related supporting equipment to ensure stable performance and safe operation of long-distance transportation.

2. How to use submersible dredge pumps and sand booster pumps together

As a special type of pump equipment, the submersible dredge pump is mainly used for pumping slurry underwater or in liquid. This kind of pump has two core features: first, it can work underwater or in liquid, and second, it can effectively handle media containing solid particles. These two characteristics make submersible dredge pumps play an important role in many industries.

However, although submersible dredge pumps have advantages in underwater operations and handling solid particles, when faced with some specific situations, such as long conveying distances or operations that require overcoming large lifts, the use of submersible dredge pumps alone may encounter problems. to some challenges. This is because during the transportation process of the submersible dredge pump, it is affected by factors such as liquid resistance, particle abrasion, and motor power. In long-distance transportation projects, the performance of the pump may be reduced, and the pump may even be unable to complete the transportation task.
In order to solve this problem, a combined solution can be considered, that is, a submersible dredge pump can be used in conjunction with other types of pumps.  In this combined system, the submersible dredge pump is responsible for handling media containing solid particles, and other types of pumps are responsible for long-distance transportation. In this way, the advantages of the submersible dredge pump in handling solid particles can be fully utilized, and the difficulty of long-distance transportation can be overcome to achieve efficient and stable transportation effects.

A sand booster pump (also called a relay pump) is a pump used to transfer or boost fluids from one pumping station to another. It can be used to connect the piping system between the submersible dredge pump and the target transfer point. Relay pumps usually have high lift head and pressure capabilities, which can help overcome resistance and elevation differences in long-distance transportation.

Submersible Sand Slurry Pump
sand booster pump

1 Determine the Submersible Dredge Pump Transportation Requirements

When selecting submersible dredge pumps and sand booster pumps, you first need to clarify several key factors, including the characteristics of the transported medium, transportation distance and lift requirements. These factors will directly affect pump selection and piping system design.

First of all, the characteristics of the transported medium are an important basis for selecting a submersible dredge pump. Different media properties require different pumps to handle. For example, for media containing solid particles, a pump with strong wear and shear performance needs to be selected to ensure stable operation of the pump. In addition, the viscosity and density of the medium will also affect pump selection.
Secondly, the conveying distance and lift requirements are also key factors. This involves the operating range and capabilities of the submersible dredge pump. The requirements for long-distance transportation and high-pressure transportation require the selection of submersible dredge pumps with higher lift and transportation capabilities. Otherwise, the psubmersible dredge pump’s delivery capacity is insufficient, which may cause increased pressure loss during the delivery process, or even fail to meet the delivery requirements.
After clarifying the above factors, you can choose the appropriate submersible dredge pump and sand booster pump. The submersible dredge pump has good wear performance and shear performance, and is suitable for transporting media containing solid particles. Sand booster pumps are suitable for long-distance, high-pressure transportation needs.
Finally, an appropriate piping system is designed based on the conveying distance and lift requirements. Reasonable pipeline layout and flow rate design can reduce pressure loss, improve transportation efficiency, and reduce operating costs. At the same time, factors such as pipe materials, elbows, valves, etc. also need to be considered to ensure the normal operation and easy maintenance of the submersible dredge pump.

2. Install Submersible Dredge Pump

The working efficiency and working stability of the submersible dredge pump largely depend on the installation location and fixing method. Therefore, when installing a submersible dredge pump, we need to pay special attention to the following aspects.
First, choosing a suitable installation location is crucial. The submersible dredge pump should be installed at the source of the medium or the initial pumping station. This can ensure that the submersible dredge pump can fully contact the liquid that needs to be transported and improve work efficiency. At the same time, it is also necessary to ensure that the submersible dredge pump can be fully submerged in the liquid to make full use of its delivery capacity.
Secondly, the selection and use of fixtures is also key. During the installation process, appropriate fixing devices should be used to fix the pump in the required position to prevent the pump from shifting or tilting during operation and affecting the normal operation of the submersible dredge pump. Generally speaking, we can use equipment such as electric hoist, winch or excavator to lift the pump body and motor to ensure that the entire pump body and motor are immersed in the liquid.
In addition, there are some special needs that need to be considered for different working environments. For example, under some working conditions with low water levels, the operating temperature of a submersible dredge pump may increase. In this case, a pump equipped with a cooling cover can be selected to ensure stable operation of the pump. OCEAN Pump equips each model of submersible dredge pump with a cooling cover to meet the needs of such working conditions.
Finally, we can also provide customers with a complete set of floating production platform system designs. This system can be easily moved in the water and is suitable for situations where frequent changes of working positions are required. The floating production platform can not only be equipped with a submersible dredge pump, but can also integrate other auxiliary equipment, such as high-pressure flushing equipment, mixers, generator sets, mobile equipment, hoisting equipment, etc., to provide customers with a one-stop solution.

3. Design the Submersible Dredge Pump Piping System

Design a suitable piping system to connect the submersible dredge pump and sand booster pump. In order to ensure the operating efficiency and stability of the submersible dredge pump, it is particularly important to design a suitable piping system. This article will elaborate on how to design a suitable piping system to achieve efficient, safe, and stable operation.
First, we need to focus on the diameter of the pipe. The choice of diameter directly affects the flow rate and energy loss of the pipe. If the diameter of the pipe is too small, the flow rate will be too fast, which will accelerate the wear of the pipeline line; conversely, if the diameter is too large, the flow rate will be too slow, which will cause slurry to settle and easily cause pipe blockage, thereby reducing production. Therefore, reasonable selection of pipe diameter is crucial. OCEAN Pump provides customers with appropriate pipeline inner diameter calculation services based on factors such as flow rate, head, and discharge distance to ensure pump performance and pipeline service life.
Secondly, we need to choose appropriate pipe materials. In the process of transporting slurry and solid particles, the corrosion resistance and wear resistance of pipelines are crucial. Rubber hoses, HDPE pipes and steel pipes are common pipe materials, each with different advantages. Rubber hoses have good flexibility and flexibility and can adjust the direction of the pipe; HDPE pipes have high corrosion resistance and wear resistance, and are suitable for discharging and transporting sand, particulate matter and wastewater; steel pipes have high strength and Wear resistance, suitable for high pressure and high impact scenarios. In actual applications, these three pipelines can be used in combination according to needs to achieve efficient and stable operation.
When designing the pipeline system, you can first connect the outlet of the submersible dredge pump with an iron pipe, because the iron pipe has strong wear resistance and can withstand large impact forces. Next, use rubber hose to connect the remaining pipes. The flexibility of the rubber hose allows for easy adjustment of the pipe direction. Finally, HDPE pipes are used to discharge and transport sand, particulate matter and wastewater. In this way, OCEAN Pump has created a pipeline system that is efficient, safe and stable.

4. Selection and Installation of Sand Booster Pump

The selection of sand booster pump is very important and needs to be accurately matched according to the actual working conditions, such as the required lift and pressure capacity. While the sand booster pump bears part of the load of the submersible dredge pump, it also needs to ensure stable operation. Only a suitable sand booster pump can improve work efficiency and reduce equipment wear. When selecting a sand booster pump, the flow rate and lift of the submersible dredge pump should be fully analyzed, and a suitable sand booster pump should be selected based on the parameters of the submersible dredge pump to ensure that the flow rate of the sand booster pump is generally consistent with that of the submersible dredge pump, and the pipelines must also be adapted to achieve relay Maximum efficiency.
There are three common positions to choose from when installing sand booster pumps. The first one is installed on the same platform as the submersible dredge pump for easy operation. Operators can control the submersible dredge pump and sand booster pump at the same time on the platform, greatly improving work efficiency. The second is to install the sand booster pump on the shore to make full use of the terrain advantages and reduce the working pressure of the pump. The third method is to build a relay platform on the water and place the sand booster pump on the platform. This installation method is beautiful and practical, and is easy for maintenance and repair. my country’s well-known OCEAN Pump company, with many years of industry experience and professional technology, can provide customers with personalized solutions according to different working conditions.

5. Control and Monitoring System of Submersible Dredge Pump

In order to ensure safe operation and performance monitoring of the entire set, it is particularly important to equip appropriate control and monitoring systems. They can help operators understand the operating status of equipment in real time and detect and solve potential problems in a timely manner. In order to provide a full range of control and monitoring solutions, OCEAN Pump, a well-known Chinese pump manufacturer, provides customers with a complete set of control and detection systems. These systems include key components such as frequency conversion control cabinets, PLC operating platforms, pressure sensors, flow meters, and liquid level sensors.
1. The frequency conversion control cabinet is an important part of the control and monitoring system. It can adjust the speed of the submersible dredge pump according to actual needs, thereby achieving precise control of the flow rate. By changing the speed of the submersible dredge pump, energy consumption can be effectively reduced and the service life of the pump can be increased. In addition, the frequency conversion control cabinet can also realize the coordinated work of multiple pumps to ensure the stability and reliability of the entire system operation.
2. The PLC operating platform is the core part of the control and monitoring system, and it has powerful data processing and control capabilities. Through programming, you can control the starting, stopping, fault alarm and other functions of the pump. At the same time, the PLC operating platform can also collect and process data from various sensors in real time to provide managers with accurate equipment operating parameters.
3. Monitoring equipment such as pressure sensors, flow meters and liquid level sensors are used to monitor the operating status of the submersible dredge pump in real time. Through these sensors, parameters such as outlet pressure, flow rate and liquid level of the submersible dredge pump can be accurately grasped to ensure that the submersible dredge pump operates under optimal working conditions. When abnormal conditions are detected, the control system will immediately send out an alarm to remind operators to deal with it in a timely manner to avoid equipment damage and production interruption.

3. Successful Cases

In 2023, a customer in the Philippines got in touch with Lingda Kong, the business manager of OCEAN Pump, a well-known submersible mining pump manufacturer in my country. The customer plans to carry out sand mining operations 800 meters offshore and transport the excavated sand to the inside of the geomembrane on the shore. This project faces two major challenges. First, the sand on the seabed is hard and cannot be lifted up by ordinary jet-suction sand pumping ships. Second, the distance between the sand mining point and the shore is far, making it difficult for ordinary equipment to do the job.
First, let’s understand the first difficulty of the project. The sand on the seabed is so hardened that ordinary jet-suction sand-draining ships cannot lift it up. Solving this problem requires equipment with a reamer, which can effectively stir up the hard sand. However, the high cost of cutter suction vessels prohibits many customers. How to reduce costs while ensuring results?
Secondly, another difficulty in the project is that the sand mining point is 800 meters away from the shore. High-lift horizontal pumps can meet this demand, but horizontal pumps are usually used on jet suction ships or cutter suction ships. However, ordinary submersible slurry pump ships cannot achieve such a long discharge distance. This undoubtedly brings greater difficulty to the project.
At this critical moment, OCEAN Pump’s engineer Lingda Kong (Whatsapp: +86 185 6229 3317) relied on her rich professional experience to propose an innovative solution for customers. They designed a solution for a submersible slurry pump ship to be equipped with a relay pump, allowing the submersible slurry pump and relay pump units to work together on an operating platform. This can not only meet the distance needs of customers, but also reduce costs.
For the customer’s hard sand layer, Lingda Kong (Whatsapp: +86 185 6229 3317) equipped the customer with two side mixers. This can fully stir the hard sand at the bottom and improve sand mining efficiency. To further increase efficiency, they are equipped with a high-pressure water pump. In this way, both distance and hardness can be well resolved.

Serial No.Pump ModelSpecificationRemark
1DMD600-15-55Flow capacity :600m3/h ,With 15m head, Rotation Speed :980rpm, Power :55 Kw .With 10m cable
2Side Cutters11 Kw to cut the sand up and make the sand with more concentration
3BoosterSand Pump SetFlow capacity :700m3/h ,With 40m driven by the motor ,connected by pulley beltWith cover to protect the belt transmission
4High Pressure water jetWith 50m head to ensure the sand can be jet up and also concentration the sand
Booster Sand pump (4)
Booster Sand pump (2)

Several major advantages of this solution
1. Suitable for submersible dredge pumps. Highly efficient and energy-saving, it only needs electricity to drive, no additional water is needed, and it is easy to operate.
2. Suitable for side milling cutters. This is a new technology that our company launched before receiving customer feedback. When the sand pit is not easy to collapse, we use side cutter rotation to make the sand around the pump gather inward and increase the sand output.
3. Booster sand pump set. submersible dredge pumps pump out sand, but due to lift limitations, they cannot discharge it over long distances. Therefore, a parallel line needs to be set up to connect the two pump outlet hoses to a large hose and deliver it to the booster sand pump set. The booster pump unit has a head of 40 meters, which is sufficient for transportation.
4. High-pressure water pump set. As mentioned previously, the customer had used a water jet pump, but the results were not good. This time we provide high-pressure water spray pumps to better flush the sand and improve pumping efficiency.
5.Customer customization. Based on customer needs, we calculate pipe losses and give recommended pipe sizes.
After about 15 working days, we completed all production tasks and tested the pump to ensure qualified quality. We then assist the customer in shipping the goods.

Booster Sand pump (5)
Booster Sand pump (6)
Booster Sand pump

4. About OCEAN Pump

TAIAN OCEAN PUMP holds the top position as a manufacturer of slurry pumps and sand dredge machines for various sizes and applications. We cater to the specialized needs of this industry by offering dredge parts, dredging support equipment, and our extensive engineering expertise. Throughout the years, TAIAN OCEAN PUMP has established a dominant presence in the dredge manufacturing sector, and we take pride in being the ultimate supplier for dredge design, service, and consultation. What sets us apart from our competitors is our unwavering commitment to keeping our customers well-informed about the latest dredging trends, including advancements in technology through continuous research.

Lingda Kong
Tai’an Ocean Pump Co.,Ltd
Mobile/Whatsapp/Wechat: +86 18562293317
Website: www.slurrypumpdm.com