1、What are submersible slurry pumps?
In addition to the main wheel, DEPUMP®submersible slurry pumps also adds a set of stirring impellers at the bottom, which can spray the precipitated slag into a mixed liquid of water and solid particles. So that the pump can achieve high-concentration delivery without auxiliary devices. The unique sealing device can effectively balance the pressure inside and outside the oil chamber, so that the pressure at both ends of the mechanical seal is balanced, which ensures the reliable operation of the mechanical seal to the greatest extent, and greatly prolongs its service life. Overheating and other protection devices enable the product to operate safely for a long time under harsh working conditions.
2、Structural characteristics and working principle of submersible slurry pumps
DEPUMP® submersible slurry pumps is a coaxial integration of the water pump and the motor. During operation, the pump impeller is driven to rotate through the motor shaft, and the energy is transferred to the slurry medium to generate a certain flow rate, which drives the flow of solids and realizes the transportation of the slurry.
Its main features are as follows:
The whole machine is a dry motor down pump structure. The motor is protected by a mechanical seal, which can effectively prevent high-pressure water and impurities from entering the motor cavity. In addition to the main impeller of DEPUMP® submersible slurry pumps, there is also a stirring impeller, which can stir the slag deposited on the bottom of the water into a turbulent flow and extract it. The impeller, stirring impeller and other main flow components are made of high wear-resistant materials, which are wear-resistant, corrosion-resistant, non-clogging, and have strong sewage discharge capacity, and can effectively pass through larger solid particles. It is not limited by suction stroke, has high slurry suction efficiency and more thorough dredging. No need for auxiliary vacuum pump, lower investment. There is no need for auxiliary stirring or jetting device, which makes the operation easier. The motor is submerged underwater, and there is no need to build complex ground protection and fixtures, making it easier to manage. The stirring impeller directly contacts the deposition surface, and the concentration is controlled by the diving depth, so the concentration control is more comfortable. The equipment is directly submerged underwater, without noise and vibration, and the site is cleaner.
3、Application of submersible slurry pumps
Submersible slurry pumps can be widely used in mining, electric power, metallurgy, coal, environmental protection and other industries to transport abrasive slurry containing solid particles. Such as slurry transportation in metallurgical dressing plants, hydraulic ash removal in thermal power plants, coal slurry and heavy medium transportation in coal washing plants, river dredging, and river dredging. In the chemical industry, some corrosive slurries containing crystals can also be transported.
Submersible slurry pumps is a kind of slurry pump. In the application range of slurry pump, about 80% are used in mineral processing plants in the mining industry. Due to the harsh conditions of ore primary selection, the service life of the slurry pump is generally low in this section. Of course, different ores have different abrasiveness.
Although DEPUMP® submersible slurry pumps have a wide range of uses, the correct application is very important. Due to the limitations of its name, the slurry pumps makes some non-industry people misunderstand it. In fact, the impurity pump, dredging pump, dredging pump, etc. are all in the application scope of the slurry pump. In the application process of the slurry pump, it is very important to pay attention to reasonable design, correct calculation, and suitable model selection.
4、Precautions during operation of slurry pumps
When the submersible slurry pumps are working, the pump needs to be placed on land, the suction pipe is placed in the water, and the pump needs to be started. Due to the limitation of the structure of the mud pump and the vertical slurry pump, the motor needs to be placed on the water surface and the pump is put into the water, so it must be fixed, otherwise, the motor will be scrapped when the motor falls into the water. Moreover, because the length of the long shaft is generally fixed, the installation and use of the pump are more troublesome, and the application occasions are subject to many restrictions.
If there are standby submersible slurry pumps, it is better to use the two pumps alternately. If the pump is stuck, the only way to repair the pump is to add a net to the water inlet to prevent excessive impurities from entering the pump, so that the probability of the pump being stuck will be much smaller!
DEPUMP® submersible slurry pumps should be divided into two aspects: electric and mechanical. For the mechanical aspect, the main maintenance records are transferred and compared. The second is the electrical aspect, to understand the power of each pump motor, have a certain understanding of his control system. Slurry pumps with mechanical seals must ensure the supply of shaft seal water. It is strictly forbidden to run without water, otherwise the mechanical seal will be burned.
5、Selection and design of submersible slurry pumps
The selection and design of DEPUMP® submersible slurry pumps has a great influence on the service life and operation stability of the slurry pump. A scientific and reasonable selection design will affect whether your slurry pump can achieve the best and efficient operation.
There are three main characteristics of efficient submersible slurry pumps:
First, DEPUMP® submersible slurry pumps has high operating efficiency and low loss.
Second, the service life of the over current parts of DEPUMP® submersible slurry pumps are relatively long, which saves production costs.
Third, the entire industrial and mining system runs stably, and the operation of the entire industrial and mining system will not be affected by the operation of the pump.
Fourth, the selection parameters: outlet diameter, flow, head, motor power, impeller speed, pumping rate, maximum particles, weight.
6、What will affect the efficiency of submerged slurry pump?
A, The efficiency of the submersible slurry pumps itself is the most fundamental influence. Pumps under the same working conditions may differ by more than 15% in efficiency.
B, The operating condition of the centrifugal pump is lower than the rated working condition of the pump, the pump efficiency is low, and the energy consumption is high.
C, The motor efficiency remains basically unchanged during use. Therefore, it is very important to choose a high-efficiency motor.
D, The influence of mechanical efficiency is mainly related to design and manufacturing quality. After the submersible slurry pumps is selected, the later management has less impact.
E, Hydraulic loss includes hydraulic friction and local resistance loss. After the pump runs for a certain period of time, the surface of the impeller and guide vanes will inevitably be worn, the hydraulic loss will increase, and the hydraulic efficiency will decrease.
F, The volume loss of DEPUMP® submersible slurry pumps are also called leakage loss, including three leakage losses of the impeller seal ring and the axial force balance mechanism. The level of volumetric efficiency is not only related to design and manufacturing, but also to post-management. After the pump runs continuously for a certain period of time, due to the friction between the various components, the clearance increases and the volumetric efficiency decreases.
G, The centrifugal pump is evacuated and idling due to the blockage of the filter cylinder and the intake of the pipeline.
H, Before DEPUMP® submersible slurry pumps are started, the employees do not pay attention to the preparations before the centrifugal pump is started, and the basic operating procedures such as heating pump, disc pump, and perfusion pump are not fully implemented, which often causes pump cavitation, resulting in high pump noise, large vibration and low pump efficiency. .
SS series submersible slurry pumps can be widely used in mining, electric power, metallurgy, coal, environmental protection and other industries to transport slurry with abrasive solid particles. For example, transportation of mineral slurry in metallurgical concentrator, hydraulic ash removal in thermal power plant, transportation of coal slurry and dense medium in coal preparation plant, dredging of river channel, river dredging, etc. In the chemical industry, it can also transport some corrosive slurry containing crystal.
Submersible Slurry Pumps are a type of pump that can be fully submerged in water. The motor is enclosed in an airtight seal and is close-coupled to the body of DEPUMP® Submersible Slurry Pumps. DEPUMP® Submersible Slurry Pumps push water to the surface by converting mechanical energy into kinetic energy, then into pressure energy.
At present, about 80% of slurry pumps are used in mineral processing plants of mining industry. Due to the poor working condition of ore primary separation, the service life of slurry pump in this section is generally low. Of course, different ores have different abrasivity.
Submersible Slurry Pumps mainly includes Electric Submersible Slurry Pumps, Excavator-hydraulic Submersible Slurry Pumps and Hydraulic Oil Station Submersible Slurry Pumps. If you are interested in us, please contact us. You can email us or add our wechat. Look forward to working with you.
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