Slurry pumps play a crucial role in various application scenarios. As a specific type of equipment, the core function of a slurry pump is to extract sand, mud, and other suspended particles from water or liquid and transport them from one location to another. When choosing a pump suitable for a specific task, deciding whether to use a submersible slurry pump or a non-submersible pump is a key decision point. Given that each pump has its unique characteristics and advantages, understanding the differences between them is essential for making a wise choice. This article will provide a detailed exploration of some key differences between submersible slurry pumps and non-submersible pumps, aiming to provide valuable reference for your decision-making and help you choose the pump type that best suits your needs

submersible-slurry-pump
sand slurry pump in dredger
Excavator pump
booster slurry pump

1.What is Submersible Slurry Pump

1.1 What Is the Working Principle and Structure of the Submersible Slurry Pump?

After careful design and manufacturing, OCEAN Pump’s submersible slurry pump showcases its unique structure and excellent performance. During operation, the submersible slurry pump is fully immersed in water, with the pump and motor installed axially. Based on the principle of centrifugal force, the impeller inside the pump rotates, generating a powerful centrifugal force that effectively draws in and accelerates the surrounding slurry. Through the acceleration of the impeller, the slurry enters the pressure area of the pump and is smoothly discharged through specially designed outlet pipelines. Additionally, the special structural design of the pump body and pipelines, along with precise hydraulic design, significantly reduces the resistance and energy consumption of slurry flow, greatly enhancing the working efficiency and conveying capacity of the submersible slurry pump, ensuring its stable and reliable operation.

The construction of a submersible slurry pump typically consists of the following main components

1.1.1 Pump Casing of Submersible Slurry Pump

The core component of a submersible slurry pump is the pump casing, which is typically constructed with high-chrome alloy to ensure durability and exhibit excellent corrosion and wear resistance. The size design of the pump casing is usually matched with the outer diameter of the impeller to achieve optimal performance. OCEAN Pump has also innovated in the design of the bottom filter plate of the pump casing. Depending on different working conditions, some products have added a filtering device, while others have extended the length of the filter nozzle. This flexible design solution aims to meet diverse application requirements. The bottom of the pump casing directly contacts the sand source, effectively improving the efficiency of sand extraction. Lastly, the outlet of the pump casing is connected to a rubber hose for smooth discharge of the slurry.

1.1.2 Impeller of Submersible Slurry Pump

As a crucial component of the submersible slurry pump, the impeller plays a vital role. To ensure its continuous and stable operation in harsh working environments, we typically manufacture it using high-strength and wear-resistant alloy materials. When the impeller starts to rotate, the generated centrifugal force efficiently draws the slurry containing solid particles into the pump casing and provides the necessary propulsion for slurry transportation. The design and shape of the impeller are directly related to the performance and efficiency of the submersible slurry pump. Therefore, at OCEAN Pump, we pay special attention to the research and optimization of the impeller. Our product range covers open and semi-open impeller structures to cater to different types of slurry characteristics. Additionally, we offer flexible adjustment options to modify the impeller’s speed, number of blades, and shape according to specific application requirements. This ensures that the submersible slurry pump can meet various pumping capacities and delivery distances. It is worth mentioning that our semi-open impeller design has excellent flow capacity and can handle solid particles with a maximum diameter of 60mm. This feature allows the submersible slurry pump to exhibit outstanding wear resistance and corrosion resistance even in high concentration, large particle, and harsh working environments, ensuring long-term stable operation of the equipment.

1.1.3 Power System of Submersible Slurry Pump

The submersible slurry pump has two types of power systems. One is the electric motor, which is typically located inside the pump casing and has waterproof and sealed design to protect the motor from water ingress and damage. The electric motor provides the power to drive the rotation of the impeller. The other type is hydraulic drive, where the hydraulic system transmits power to the impeller through a drive shaft, thereby driving the rotation of the impeller. Hydraulic drive is usually suitable for higher power and deeper submersion depth of the sand pump. The advantage of the hydraulic system is that it can provide more stable and reliable power transmission in harsh underwater environments, while reducing the risks associated with motor sealing and electrical connections.

1.1.4 Seal Device of Submersible Slurry Pump

To ensure the stable operation of the submersible slurry pump in underwater environments and prevent damage caused by water entering the motor and pump casing, OCEAN Pump equips it with efficient seal devices. For smaller-sized submersible slurry pumps, we typically use one mechanical seal to ensure sealing performance. For larger-sized pumps, we may add 2-3 mechanical seals to enhance the sealing effect. In addition, OCEAN Pump prioritizes user safety. We equip the submersible slurry pump with water inlet protection. In the event of water ingress into the motor or oil chamber, the control system will immediately initiate a shutdown procedure to effectively prevent equipment damage and ensure the safety of the surrounding environment and personnel. With these design measures, OCEAN Pump aims to provide users with more reliable and safe submersible slurry pump products to meet the needs of different application scenarios.

1.1.5 Control System of Submersible Slurry Pump

The submersible slurry pump is typically equipped with an advanced control system that is responsible for comprehensive monitoring and control of the pump’s operating status. This includes important functions such as motor startup and shutdown, as well as safety protection. When designing customized solutions for our customers, the OCEAN Pump design team often recommends the use of a variable frequency control cabinet. This control cabinet offers excellent performance and, through flexible frequency adjustments, can effectively regulate the pump’s flow rate and head to meet the needs of various application scenarios. Additionally, the control cabinet is equipped with dedicated control circuits and integrated with multiple protection mechanisms such as overload and overheating, ensuring precise control of the submersible sand pump’s startup and shutdown. It also ensures the motor operates in optimal conditions while fully guaranteeing the safety of operators and the surrounding environment.

2. What is Horizontal Slurry Pump?

2.1 What Is the Working Principle and Structure of the Horizontal Slurry Pump?

The working principle of a horizontal slurry pump is primarily based on the generation and application of centrifugal force. The center of the pump aligns horizontally with the center of the driving source, such as a diesel engine or motor. The rotation of the driving source drives the impeller to rotate, creating centrifugal force. This centrifugal force causes the water-sand mixture or slurry containing sand particles to be drawn into the pump and transported through the pipeline system. Inside the pump, the sand-water mixture is accelerated by the centrifugal force of the impeller, then enters the pressure area of the pump, and eventually discharges through the outlet pipeline. Throughout the entire working process, the internal structure of the pump is specially designed and hydraulically configured to reduce resistance, minimize energy consumption, and improve the pump’s efficiency and conveying capacity.

The structure of a horizontal slurry pump usually consists of the following main parts:

slurry pump work
submerisble slurry pump work

2.2.1 Pump Casingof Horizontal Slurry Pump

The casing of the horizontal slurry pump is typically installed inside a ship’s hull or on the shore, designed to be exposed to the air. To ensure its strength, corrosion resistance, and wear resistance, we use high-chrome alloy as its main material. The rotation direction of the pump casing can be customized according to the customer’s working environment requirements, either in the forward or reverse direction. Ocean Pump is committed to meeting the personalized needs of our customers. We not only customize the pump’s discharge direction and discharge angle, but also equip both the inlet and outlet with flanges and elbows for easy connection and installation. Additionally, we understand the importance of flow meters and voltage gauges in the operation of the slurry pump. Therefore, our sales representatives proactively recommend these key equipment to our customers. We are dedicated to providing comprehensive and professional services to ensure the efficient and stable operation of the slurry pump.

2.1.2 Impellerof Horizontal Slurry Pump

One of the key components of the horizontal slurry pump is the impeller, which plays a crucial role in the pump’s operation. Depending on the design, the impeller can be classified into two types: open and closed. The open impeller is suitable for environments with high flow rates, low head, and relatively short conveying distances. On the other hand, the closed impeller is more suitable for projects that require long-distance transportation. It is worth mentioning that the impellers developed by Ocean Pump’s design team have spacious flow passages, ensuring smooth flow at high velocities and achieving long-distance conveying capabilities. Additionally, by adjusting the impeller’s diameter, we can flexibly change the relationship between flow rate and head to meet different engineering requirements.

2.1.3 Power System of Horizontal Slurry Pump

The power system of the horizontal pump can be divided into two types: motor-driven and diesel engine-driven. The motor is typically a horizontal motor, and it is important to ensure that the pump’s centerline height matches the motor’s centerline height, and it is equipped with the appropriate base. Motor-driven horizontal pumps need to be used in conjunction with frequency control cabinets to control the motor’s start and stop, ensuring safety. On the other hand, diesel engine-driven horizontal pumps can be connected by belts, direct connection, or gearboxes. Especially when using a gearbox connection, it is crucial to ensure that the pump’s centerline height, the gearbox’s centerline height, and the diesel engine’s centerline height are aligned to ensure stable operation of the equipment.

2.1.4 Sealing Device of Horizontal Slurry Pump

The horizontal slurry pump does not need to be submerged underwater during operation, so the requirements for the sealing device are relatively low. To meet this requirement, commonly used sealing devices include skeleton oil seal and packing seal. These two sealing methods are sufficient to ensure that sand and water do not enter the bearing housing, thereby ensuring the normal operation of the pump.

3. What Are the Characteristics and Advantages of Submersible Slurry Pumps and Horizontal Slurry Pumps?

3.1 What Are the Characteristics and Advantages of Submersible Slurry Pumps?

3.1.1 Underwater Operations

Through meticulous design, the submersible slurry pump is equipped with a submersible motor, enabling it to operate directly in underwater environments. This eliminates the cumbersome process of building platforms and fixed structures required for dry pumps, significantly reducing infrastructure investment costs. During operation, the pump’s suction inlet comes into direct contact with the slurry, effectively increasing the extraction concentration. To meet the diverse needs of our customers, the R&D department of OCEAN Pump has also carefully designed side agitators or flushing devices, aiming to thoroughly mix the slurry and further enhance work efficiency

3.1.2 Strong Adaptability

The submersible slurry pump is specifically designed to handle liquid with solid particles, such as sand-containing water. Its pump casing and impeller are made of high-quality alloy materials known for their excellent corrosion resistance and wear resistance. As a result, the submersible slurry pump can effectively extract different media, including sludge, mud, silt, coarse sand, and gravel, without any impact on its efficiency or lifespan due to the presence of solid particles. The design concept and material selection reflect a rigorous, stable, and rational engineering approach, ensuring stable and reliable operation in various harsh environments.

3.1.3 Easy Installation

Due to the integrated design of the submersible slurry pump’s motor and pump body, they are connected internally to form a compact structure. Typically, when shipping to customers, these components are already preassembled, eliminating the need for additional assembly. Additionally, we provide optional side agitators for customers, which are also easy to install. Similarly, the installation of the high-pressure flushing gun is straightforward and intuitive. The installation and maintenance process of the submersible slurry pump is relatively simple, effectively reducing labor and maintenance costs.

3.1.4 High Efficiency and Energy Saving

The meticulously designed submersible slurry pump incorporates cutting-edge fluid dynamics principles. Its unique electric drive system ensures direct and efficient conversion of electrical energy to mechanical energy, allowing the impeller to complete the pumping task through smooth rotation driven by the motor. Compared to other transmission methods such as hydraulic or diesel engines, the electric drive system significantly enhances energy utilization efficiency and greatly reduces unnecessary energy loss. As a result, the submersible slurry pump maintains excellent sand pumping performance with lower energy consumption, thereby saving operational costs for users.

3.1.5 Safety and Reliability

When the submersible slurry pump is in operation, the entire pump body is immersed in water, which helps to prevent motor overheating issues. Additionally, when providing solutions to customers, Ocean Pump company equips the pump with a frequency control cabinet. This control cabinet features multiple safety protection devices, such as overload protection and water ingress protection, significantly enhancing the safety and reliability of the equipment, ensuring the safety of personnel and the surrounding environment.

3.2 What Are the Characteristics and Advantages of Horizontal Slurry Pumps?

Horizontal slurry pump is another common sand pumping equipment. Its characteristics and advantages are mainly reflected in the following aspects:

3.2.1 High Head

The unique design of the horizontal slurry pump gives it excellent head performance. The impeller design is particularly crucial, often requiring precise manual installation and adjustment to ensure it generates sufficient pressure and head. This design allows the horizontal slurry pump to effortlessly pump slurry to higher locations, making it especially suitable for long-distance transportation requirements. With its high efficiency and stability, the horizontal slurry pump meets the needs of various different scenarios.

3.2.2 High Flow Rate

The horizontal slurry pump is matched with a diesel engine, providing higher power and torque. This configuration significantly enhances its flow rate performance. Despite being equipped with a closed impeller, the spacious flow passage design ensures that it can maintain a high flow rate. The horizontal slurry pump typically has a large flow processing capacity, allowing it to efficiently handle a large volume of sand-containing liquid in a short period, thereby significantly improving work efficiency.

3.2.3 Excellent Stability

The horizontal slurry pump is typically deployed inside the ship or along the shore and needs to be securely fixed in place during operation. Its horizontal structure is characterized by the stable power output from the motor and diesel engine, ensuring a high level of operational stability. Based on this design, the horizontal slurry pump performs exceptionally well during operation, with an extremely low failure rate, providing a solid guarantee for continuous and stable work.

3.2.4 Wide Application Range

The horizontal slurry pump has broad applicability and environmental adaptability, meeting the needs of various usage scenarios. It is particularly common in environments such as dredging ships, large factories, cutter suction dredgers, and jet suction dredgers. This is mainly due to its smooth operation characteristics, allowing it to maintain stable performance in various work settings. Moreover, even in remote outdoor environments where power supply may be inconvenient, the horizontal slurry pump can still provide convenient solutions for sand pumping. Additionally, whether it’s in rivers, lakes, or ponds, the horizontal slurry pump can effectively carry out sand pumping operations, demonstrating its high practicality and versatility.

4. Performance Comparison Between Submersible Slurry Pump and Horizontal Slurry Pump

4.1 Comparison of Sand Pumping Capacity and Efficiency Between Submersible Slurry Pump and Horizontal Slurry Pump

4.1.1 Sand Pumping Capacity

After thorough analysis and objective comparison, we have found that there is no significant difference in sand pumping efficiency between the submersible slurry pump and the horizontal slurry pump. Both are capable of effectively handling large particles and high-concentration sand-water mixtures, demonstrating excellent conveying abilities. However, in the application scenarios of large-scale engineering projects, the horizontal slurry pump shows more prominent advantages.

In particular, the submersible slurry pump can handle a maximum particle diameter of 60mm, while the latest design of the horizontal slurry pump can increase the maximum particle diameter to nearly 300mm. This data indicates that the horizontal slurry pump exhibits higher adaptability and efficiency when it comes to meeting the sand pumping needs of large-scale projects.

4.1.2 Efficiency

There is a slight difference in efficiency between the submersible slurry pump and the horizontal slurry pump. The submersible slurry pump, being submerged in water during operation, experiences reduced suction resistance, which generally results in higher efficiency. On the other hand, the horizontal slurry pump may encounter some resistance and energy loss due to factors such as the inlet and pipeline, leading to relatively lower efficiency.

4.1.3 Discharge Distance

Considering that the submersible slurry pump relies on electric power for operation, its power is limited by factors such as the electrical supply and the scale of the power source. As a result, its power and conveying distance are somewhat constrained. On the other hand, the horizontal slurry pump can be driven by either electric power or diesel engines. In comparison, diesel engines offer greater torque and more stable power input. This enables the horizontal slurry pump to achieve a head lift of 100-200 meters, further highlighting its ability to convey over longer distances.

It’s worth mentioning that Ocean Pump has developed a specialized sand pump for relay pumping, which has achieved a remarkable conveying distance of up to 80 kilometers in the projects it has undertaken. This is a significant achievement in China. When comparing the adaptability to different operating environments, it is important to consider various factors to ensure that the selected equipment can meet the specific requirements.

4.2 Comparison of the Environmental Adaptability of Submersible Slurry Pumps and Horizontal Slurry Pumps

4.2.1 The submersible slurry pump is specifically designed for sand pumping operations in water or liquid environments, such as rivers, lakes, and ports. Its unique feature is that it can operate directly in the liquid without the need for additional support structures or fixed equipment, greatly enhancing work efficiency. However, the submersible slurry pump relies on a power source for operation. In the absence of a power supply, it can be powered by a generator set. This is its only limitation.

4.2.2 On the other hand, the horizontal slurry pump is more suitable for land-based sand pumping operations, such as earthworks and construction sites. It needs to be fixed on a support structure and utilizes an inlet to suction the sand-water mixture, which is then transported through pipelines. The working environment for the horizontal slurry pump is relatively flexible as it is driven by a diesel engine, eliminating the need for a power supply. However, to ensure its normal operation, it requires operation from an operating platform or onshore.

4.3 Comparison of Maintenance and Operation Convenience Between Submersible Slurry Pump and Horizontal Slurry Pump

4.3.1 Submersible Slurry Pump: The design of the submersible slurry pump aims to achieve convenient maintenance and operation. The motor and pump body are integrated, ensuring the integrity upon delivery and eliminating the need for additional assembly by customers. In terms of operation, users can directly control the pump through a control cabinet, which is equipped with start, stop, and control buttons, providing great convenience. Since the submersible slurry pump operates in a liquid environment, the pump body is relatively enclosed, effectively isolating external interference and reducing the risk of malfunctions.

4.3.2 Horizontal Slurry Pump: The maintenance and operation of the horizontal slurry pump may be slightly more complex compared to other equipment. Nevertheless, Ocean Pump is committed to providing solutions to our customers, and we offer access to a remote control platform. This means that operators can start, stop, and adjust the pump and diesel engine speeds from the control room without having to access the power compartment. Considering the convenience in practical applications, users may prefer to choose a complete set of sand pumping equipment when using the horizontal slurry pump, including the vessel, gantry, winch, and other supporting facilities. Please rest assured that our system has been meticulously designed and tested, ensuring excellent stability.

5. Conclusion

5.1 What is Advantages and disadvantages of the submersible slurry pump and the horizontal slurry pump?

5.1.1 Advantages of the submersible slurry pump:

  • Suitable for water-based operations, with high efficiency and sand pumping capability.
  • Relatively simple maintenance and operation, with the pump body being relatively enclosed, reducing the likelihood of malfunctions.
  • No need for additional support structures or fixed equipment, making it highly adaptable.

5.1.2 Disadvantages of the submersible slurry pump:

  • Suitable for water-based environments, not suitable for land-based operations.
  • Some maintenance and repairs may require professional divers.

5.1.3 Advantages of the horizontal slurry pump:

  • Suitable for sand pumping operations in land-based environments, such as earthworks and construction sites.
  • Capable of handling large particles and high-concentration sand-water mixtures.

5.1.4 Disadvantages of the horizontal slurry pump:

  • Factors such as inlet design and pipeline layout may result in relatively lower efficiency.
  • Requires fixation on a support structure, making operation and maintenance relatively complex.

5.2 The Importance of Choosing the Appropriate Slurry Pump Type Based on Specific Needs

Choosing the right type of slurry pump is crucial based on the specific work environment, slurry pumping requirements, and project specifications. The submersible slurry pump is suitable for water-based operations, offering high efficiency and convenient maintenance and operation, with strong adaptability. On the other hand, the horizontal slurry pump is suitable for land-based environments and can handle large particles and high-concentration slurry mixtures. Therefore, when selecting a slurry pump, it is important to consider factors such as the work environment, slurry pumping capacity, efficiency requirements, and ease of maintenance and operation.

Here at OCEAN Pump, our excellent sales representative Lingda Kong (WhatsApp +86 185 62293317) will assist customers in selecting the appropriate slurry pump type based on their specific requirements. We strive to provide the perfect solution, ensuring efficient and reliable completion of slurry pumping tasks while reducing costs and improving work efficiency.

In conclusion, both the submersible slurry pump and the horizontal slurry pump have their own advantages and disadvantages. Choosing the appropriate slurry pump type based on specific needs is key to successfully completing slurry pumping tasks.