Hebei Zidong Pump Industry Co.,Ltd

How to select a submersible sand pump for river dredging

Submersible sand pumps, also known as submerged suction pump and submersible slurry pump, is designed and developed by Hebei Zidong Pump company. Our submersible sand pumps is originally used in tailing handling and high-strength working environment for coal slag delivery. The main components of submersible sand pumps like impeller are as the same structural prototype as horizontal slurry pump impellers. The advantages of submersible sand pumps are simple operation, self-mixing operation, strong anti-abrasiveness, energy saving, environmental friendly, low noise and low failure rate. In recent years, Hebei Zidong pump co,. Ltd has developed the innovative products such as submersible sand pumps with a high-pressure water jet, large-particle submersible sand pump, submersible sand pump with side cutters, hydraulic driven submersible sand pump with side cutters, stainless steel submersible slurry pump and deep-well submersible sand pump. These sand pump products can satisfy the construction requirements with different working conditions. At present submersible sand pumps have been widely used in sand extraction, landfilling, river dredging, tailings processing and other projects.

When customers choose submersible sand pumps, sometimes they fall into a misunderstanding. This kind of sand pump has natural advantages like light and easy to use, self-stirring and this design has its own disadvantages.

Firstly, the prototype of the submersible sand pumps impeller is something like  the horizontal slurry pump, it features strong wear resistance material with the relatively narrow flow passage.

Secondly, the motor, impeller and the stirring impeller are coaxial and belong to the hard connection. Therefore, once overload operation occurs, the possibility of motor damage will increase. As a result,Hebei Zidong Pump company 

had tackled this problem by designing large-particle-flow submersible sand pumps and hydraulic supporting system through scientific and technological research.

For the selection of submersible sand pumps, it is necessary to select different sand pump types according to the actual operating conditions. The following is a list of different types of submersible sand pump selection under different construction conditions:

I. The submersible slurry pump is made of wear-resisting alloy steel with advanced structure. It has the characteristics of high efficiency, abrasion resistant, automatic coupling and long lifespan etc. It is powerful to discharge solid particles like sand and coal cinder, mainly used on the dredger, ship or boat for dredging and mineral waste residue transfer, bottom with extra agitator greatly improve the work efficiency.

Submersible sand pumps are often applied on the dredger, ship or boat, it puts the electrical motor and mechanical pump on the same axis, the slurry pump bottom is equipped with a coaxial agitator. This agitated submersible slurry pump is developed and manufactured by ZIDONG Pump on basis of the fluid mechanic’s principles. The pump is made of wear-resisting alloy steel with advanced structure. It has the characteristics of high efficiency, abrasion resistant, automatic coupling and long lifespan etc. It is powerful to discharge solid particles like sand and coal cinder.

The prototype of submersible sand pumps, suitable for working conditions with tailings processing, fine sand slurry, etc.

The initial design stage of the submersible sand pumps is mainly used for pumping fly ash, power plant sedimentation tanks and other operations, so the prototype of the submersible sand pumps are fully qualified for this operation. Since the stirring impeller is added at the bottom, mud or condensate can be breaking and disperse, so it can achieve stable operation at high concentrations.

Sometimes sedimentation ponds or the bottom of river channels have a long-term accumulation of primary sediment, Suggest to increase two or three shots of high-pressure water guns. The impact force of water gun can disperse the silt into the water to enhance the efficiency of sand extraction. The high-pressure water pump is recommended to supply 4-6 kilograms of pressure, and the power is slightly lower than the two specifications of the power for the submersible sand pump (for example: if the 22kw submersible sand pump is used, it can be matched with a high-pressure pump of 11-15kw).
If the clay layer is touched during the sand extraction process and the viscosity is strong, and the high-pressure water pump has a limited effect, an external side cutter can be used to mix directly to achieve the suction-type sand extraction method. The current power of the side mixer is from 4kw-15kw, can also be customized according to actual customer requirements.

Advantages: Easy to use, highly efficient and stable, flexible to use
Disadvantages of the pump: high particle requirements, unable to extract large particles in winding solids

2.the large particle submersible sand pumps, suitable for working conditions with sand and mud and cobblestone etc
The prototype of the submersible sand pumps impeller is closed slurry pump impeller structure, so the over-flow performance will be poor, and it is easy to block. In the face of medium with small and big particles, the semi-open impeller or the three-blade impeller structure can be selected to ensure continuous performance.
The advantages of large-particle submersible sand pumps are good over-flow performance and strong wear-resistance, but the small number of blades also brings the disadvantage of low shaft work efficiency. Therefore, it is necessary to give priority to working conditions in the selection process. Sand or uniform particles are not It is recommended to choose this type of pumping pump.

Advantages: high durability, long service life, a wide application range
Disadvantages: low efficiency, the pump lift with same power is slightly lower than the original submersible sand pumps

3. Hydraulic driven submersible sand pumps are mainly used as an excavator attachment to take the place of grab bucket when there is too much water, mud and not suitable for digging. They are often driven by the excavator hydraulic system or a separate hydraulic station to pump sand, sludge mortar, etc. The hydraulic driven submersible slurry pump is hydraulically driven instead of electrically driven which has more applications in deep water area and it is often used for dredging different matters. It is the one kind of centrifugal pump equipped with 2 or 3 agitator cutters which mix the mud or sand matters for suction.

Hydraulic driven submersible sand pumps are hydraulically driven instead of electrically driven which has more applications in deep water area and used for dredging different matters. The flow passage components of this kind of submersible slurry pumps are made of high-strength and wear-resistant alloy metal materials. Our submersible sand pump has large flow channel and is suitable for delivering relatively big solid particle coal slurry and sand, etc. The hydraulic driven submersible slurry pump is the hydraulic driven submersible sand pump, suitable for clay, clay layer, thickening layer, requiring continuous operation low failure rate conditions.
In the practical work, the motor-driven submersible sand pump for pumping sand in the construction site, sometimes sudden landslides may occur, or large particles of pebbles may be trapped in the pump, or entangled with winding-like objects, and the electric control cabinet sometimes has no time to respond. The motor is overloaded and overheated and burned. Therefore, under conditions where the cement layer and other concentrations are too high, the technician will select a hydraulic driven submersible slurry pump. The design drawings for this type of pump are based on the submersible sand pumps and will change the drive mode. It is driven hydraulically and equipped with two sets of hydraulic stirrers to achieve continuous high-concentration operation. Since the hydraulic pump has stable and high efficiency characteristics, it has oil discharge protection during use. Once overload or lock occurs, the unloading oil valve will work. Makes the submersible slurry pump shut down in time, so there will be no failure of the over-loaded motor during the pumping process.

Excavator driven submersible sand pumps for sand extraction are based on the hydraulic submersible slurry pump. The hydraulic driven submersible slurry pump connects oil line and base to excavator’s operation arm and then operates through excavator cab to achieve pumping and sand dredging operation. It is suitable for dredging occasions where the construction water level is shallow.

Advantages: High efficient and stable, diversified supporting
Disadvantages: slightly higher cost, high operating requirements

4. Stainless steel submersible slurry pumps are suitable for the extraction of corrosive liquids or solid-liquid mixture conditions, otherwise, the deep well sand pump is suitable for underwater level even to 50-100 meters construction.
The Stainless steel submersible slurry pump and deep-well submersible sand pumps design are all customized according to customer’s special requirements.

The stainless steel submersible slurry pump is made of 316L material. It is wear resistant to strong acid and alkali, and the highly efficient and stable structure of the submersible slurry pump ensures continuous operation of the pump unit.

Deep well submersible sand pumps use the QJ-type deep-well pump to achieve the stability of the sealed form so as to achieve the operation within 100 meters underwater level. However, this technology is not yet perfect, so it needs to be run in and the customer needs to be cautiously selected.

Advantages: ODM and OEM available.
Disadvantages: Technology is not yet perfect

The sand source conditions and construction requirements of each place are different. When customers select submersible sand pumps, they not only consider the flow rate, head, power and speed of the sand pump. The type of sand pump must be limited according to the sand conditions at the site. The type is more suitable, and the elimination method can also be used to determine the most suitable pump type. Each pump has its own advantages and disadvantages. Therefore, in the selection process, the on-site personnel and the selection engineer must combine the best products to achieve the expected results. At the beginning of design, the concept of the submersible sand pump was very advanced, and there were few restrictions on use. Therefore, many customers blindly selected and there were many problems. The offshore pump industry technical team designed a variety of options for users to choose from. This makes the submersible sand pumps ideally suitable for most dredging and desalting ore dressing projects.

How to Choose Submersible Sand Pumps? Some of the following factors you should consider except the above technical considerations.

1.Real factory.  Real factory is the important factor you should consider when you select submersible sand pumps. Generally speaking, real factory have its own product design, production, quality assurance and installation team, manufacturing machines and testing equipment, certifications, etc al. 
2. Complete product series. Complete submersible sand pumps will easily satisfy your requirements. ZIODNG Pump have submersible sand pumps and submersible slurry pumps with different configuration for you demands and can be used in corresponding projects.
3. Product quality.  Product quality is most important for your selection in the long life span. ZIDONG PUmp has strict quality management system to ensure its sand pump product to keep finest and uniform quality. We have standard industrial testing equipment to inspect our submersible sand pumps product quality in preset procedure. All our sand pump and sand dredger products had been certificated by the ISO9001, CE, SGS, etc. 
4. Factory price. The submersible sand pump from the real factory can give you competitive factory price in controlled product quality and promised delivery time.

5.Certifications. ISO9001, SGS are the required certificates for all submersible sand pumps.  Firstly of all, the submersible sand pumps you purchased should follow your country’s laws and regulations.
6. Successful cases. Successful submersible sand pump cases witnessed the passed efforts and abilities of the sand pump suppliers, you should try to visit them to verify you judgement. We had been specialized in designing, manufacturing and supplying sand pump, slurry pump, gravel pump and dredger equipment for more than 20 years. We had provided many types of effective and states of the art sand pump products to over 36 countries. We are not only manufacturing best quality sand pump products but also providing professional design and installation service. OEM and ODM are also available.
7. Installation and after sale service is also important when you need help.