1.What is Submersible Slurry Pump

DMS series submersible slurry pump is the powerful suction flood-proof centrifugal pump which is submerged and operated in the harshest conditions to handle highly corrosive and abrasive slurries. Slurry pumping is one of the most challenging applications. OCEAN Pump brand robust submersible slurry pump is made of the high quality wear resistant components to withstand abrasion and shock, it is engineered with all high chrome wet ends, pressurized sealing technology and run dry capability for the most demanding applications. The optimized high chrome steel impeller can ensure the best performance and operations in the best efficiency range. DMS series submersible slurry pump has the characteristics of high efficiency, high performance, excellent reliability, lower operating and maintenance cost and longer service life, it can handle concentration of solids up to 60 percent. DMS series submersible slurry pumps are suitable for complex heavy-duty applications to extract and handle slurry, sludge and sediments, etc.

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2. Parameter Table of Submersible Slurry Pump

NO.Pump TypeDISCH.DIACAPHeadPowerRotation speedEffBiggest particles discontinuous pass through

3. Working Principle and Structure of the Submersible Slurry Pump

OCEAN Pump has meticulously designed and manufactured the submersible slurry pump to showcase its exceptional performance and unique structure. During operation, the pump is fully immersed in water, with the pump and motor axially installed. The impeller inside the pump, driven by centrifugal force, rotates to generate a powerful centrifugal force that effectively draws in and accelerates the surrounding slurry. The accelerated slurry enters the pressure area of the pump and smoothly discharges through specially designed outlet pipelines. The pump body and pipeline’s special structural design, combined with precise hydraulic design, significantly reduce resistance and energy consumption, greatly enhancing the working efficiency and conveying capacity of the submersible slurry pump, ensuring stable and reliable operation.

3.1 Pump Casing of the Submersible Slurry Pump

The pump casing is the core component of the submersible slurry pump, typically constructed with high-chrome alloy to ensure durability and exhibit excellent corrosion and wear resistance. The size design of the pump casing is optimized to match the impeller’s outer diameter for optimal performance. OCEAN Pump has also introduced innovative designs for the pump casing’s bottom filter plate. Depending on different working conditions, some products feature 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. The pump casing’s outlet is connected to a rubber hose for smooth slurry discharge.

3.2 Impeller of the Submersible Slurry Pump

The impeller is a crucial component of the submersible slurry pump, playing a vital role in its continuous and stable operation in harsh working environments. It is typically manufactured using high-strength and wear-resistant alloy materials. When the impeller rotates, centrifugal force efficiently draws in the slurry containing solid particles into the pump casing, providing the necessary propulsion for slurry transportation. The impeller’s design and shape directly impact the pump’s performance and efficiency. OCEAN Pump focuses on researching and optimizing the impeller, offering open and semi-open impeller structures to cater to different slurry characteristics. Flexible adjustment options are available for modifying the impeller’s speed, number of blades, and shape to meet specific application requirements. The semi-open impeller design can handle solid particles with a maximum diameter of 60mm, ensuring excellent wear and corrosion resistance in high concentration, large particle, and harsh working environments. This design ensures long-term stable operation of the equipment.

3.3 Power System of the Submersible Slurry Pump

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

3.4 Seal Device of the Submersible Slurry Pump

To ensure the submersible slurry pump’s stable operation in underwater environments and prevent water from entering the motor and pump casing, efficient seal devices are employed. Smaller-sized pumps typically use one mechanical seal for effective sealing, while larger-sized pumps may have 2-3 mechanical seals to enhance sealing effectiveness. OCEAN Pump prioritizes user safety and equips the submersible slurry pump with water inlet protection. In the event of water ingress into the motor or oil chamber, the control system initiates an immediate shutdown procedure to prevent equipment damage and ensure the safety of the surrounding environment and personnel. These design measures provide users with more reliable and safe submersible slurry pump products tailored to different application scenarios.

3.5 Control System of the Submersible Slurry Pump

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

4.How to Choose the Size of a Submersible Slurry Pump?

4.1 Determining Project Parameters for a Submersible Slurry Pump

In order to proceed with the project, it is essential to gather comprehensive information regarding the key parameters involved. One crucial parameter is the type of slurry being handled, whether it is sediment, slurry, wastewater, or any other type. Additionally, the desired flow rate of the slurry must be specified. We can provide both the required mixed flow rate data and the desired solids content data.

4.2 Obtaining Performance Curves for the Submersible Slurry Pump

Performance curves are graphical representations that illustrate the characteristics of a pump, particularly the relationship between flow rate and head. If you need to obtain relevant product documentation or laboratory test data, you can contact Lingda Kong, the sales representative of OCEAN Pump, at WhatsApp: +86 185 6229 3317 or email sales@slurrypumpdm.com for assistance. OCEAN Pump possesses a complete set of professional pump performance testing systems, ensuring that each pump undergoes rigorous testing before leaving the factory. They provide detailed performance curve graphs and certificates of factory acceptance, aligning the selected curve with the required pump type and operating conditions to guarantee optimal performance.

4.3 Determining the Flow Rate of the Submersible Slurry Pump

Based on the specified flow rate requirements for the project, it is crucial to accurately locate the corresponding data point on the performance curve graph. Flow rate is commonly measured as the volume passing through the pump body per unit of time, typically expressed in cubic meters per hour (m³/h) or gallons per minute (GPM). If you can provide a specific numerical value for the desired sand production rate, OCEAN Pump’s professional technical personnel can estimate the corresponding mixed flow rate based on this information.

4.4 Determining the Head of the Submersible Slurry Pump

To meet the pump head requirements of the project, it is necessary to provide key parameters such as the horizontal distance, vertical distance, and extraction depth for slurry transport. OCEAN Pump’s professional technical personnel will then utilize specialized software to accurately calculate the required head and locate the corresponding head point on the performance curve. This ensures the efficient and stable operation of the pumping system.

4.5 Verification of Compatibility for the Submersible Slurry Pump

Once the flow rate and head values are selected, it is important to verify their compatibility with the matching points on the performance curve. This step ensures that the selected flow rate and head values exist on the curve, guaranteeing that the pump can reliably deliver the expected performance under the designated operating conditions. OCEAN Pump’s technical team will accurately calculate the pump’s shaft power based on parameters such as flow rate, head, discharge distance, and efficiency. This information helps determine the required power range, and we are committed to recommending pump models with sufficient margin to ensure efficient and stable operation in practical applications.