Applications of Heavy Duty Slurry Pumps
Heavy Duty Slurry Pumps
Heavy Duty Slurry Pumps are used to transport causticity or high hardness of solid particles for many industries. These types of pumps are widely used in mining, power, metallurgy, coal and other industries, as well as environmental protection industries. Although the slurry pump is widely used, its correct application is very important. Mud Pumps, impurity pumps, dredge pumps, gravel pumps are all belonging to slurry pump. In the application process of heavy-duty slurry pump, we must pay attention to reasonable design, correct calculation, appropriate selection, these 3 points are very important.
Mining processing plant application
About 80% of the heavy-duty slurry pumps are used in mining and extraction process plants. The service life of the slurry pump in this section is generally low because of the bad condition of ore primary separation. Of course, different ores have different abrasiveness. For example, in the concentrate transport, the relative readability reduces, then the overall service life of the pump is longer. Therefore, the average user often asks the life of the supplier’s products in the procurement process. Strictly speaking, any manufacturers will not without foundation for the user commitment to an accurate life cycle.
The service life of flow components (wear-and corrosion-resistant parts) depends on a number of different factors. The variety and complexity of working conditions lead to the difference in the service life of the same quality materials. But in the early stage of type selection can let the strength of the pump manufacturer to do its reasonable mode selection design. For example, China Walker who is a pump manufacturer.
Power industry application
In the power industry, heavy duty slurry pumps are mainly used in the thermal power plant. In thermal power plants, it needs to use a large quantity of coal burning to power generation. The slag or ash which after burning coal needs to be removed. The use of a slurry pump is to remove the ash. After mixing a certain amount of water, the slag is transported to the place where the ash is piled up by a slurry pump. Therefore, sometimes a slurry pump also called an ash pump in the power plant.
Coal washing process application
Because the coal washery is different, the bigger lump coal and coal gangue are easy to block up. So the slag slurry pump design request is very high. Walker slurry pump can transport larger pieces of coal, coal gangue non-blocking, long wear life.
Sea sand application
Get sand in the sea, dredging sand in rivers, the slurry pump is more easily called sand pump, dredge pump. Although called different, but speaking from the structural characteristics and the performance of the pump principle, it generally referred to as a slurry pump.
Sealing types of slurry pumps
1. Packing seal
Packing seal is the most common type of seal. This seal is in the form of water injected into the shaft seal. Constantly fill the inside of a certain amount of pressure water to prevent leakage of pump slurry. For the multi-stage pump not suitable for use with the impeller shaft seal, use the packing shaft seal. The packing shaft seal has the advantages of simple structure, convenient maintenance, and low price.
2. Auxiliary impeller seal
Auxiliary impeller seal is through a reverse centrifugal force acting on the impeller, to prevent slurry leakage. When the positive pressure of the pump inlet is less than 10% of the outlet, the single-stage pump or multi-stage pump can be used vice-impeller shaft seal. The auxiliary impeller shaft seal has the advantages of no shaft seal water, no diluting slurry, good sealing effect, and others. So in the slurry does not allow dilution of the case, you can consider such a seal slurry pump.
3. Mechanical seal
The mechanical seal is generally to the seal request quite high situation use. In particular, some chemical, food field, not only requires sealing but most of all, it is not to allow the additional components into the pump body. The disadvantages are high cost, difficult to maintain, etc.
When heavy-duty slurry pump working, the centrifugal pump needs to be put on the land, suction pipe put into the water, but also need priming of the pump when starting. Mud pump and submersible slurry pump under the structure of the constraints, the motor needs put on the surface of the water when working, the pump put into the water. Therefore, the motor must be fixed, otherwise, it will fall into the water and lead to motor scrap.
If there is a spare pump, it is best to use two pumps in rotation. If it gets stuck which has to repair. But we can add a net in the water inlet, which stops too much impurity into the pump. So the probability of a block pump will be much less.
Pump to be divided into electrical and mechanical aspects. For the aspect of the machine, the main maintenance of the previous record to pull out a comparison to know. Next is the electrical aspect, we must understand each pump motor’s power and has a certain understanding of the control system. The mechanical seal slurry pump must ensure the supply of the water shaft seal. Do not run without water, or else the mechanical seal will burn up.