Overview of slurry pumps
As a kind of equipment specialized in conveying slurry containing solid particles, slurry pumps play a vital role in many industrial fields. Whether it is tailings treatment in mines, slurry transportation in metallurgical industry, or mud treatment in electric power, coal, environmental protection and other fields, slurry pumps have become indispensable key equipment with its unique performance advantages. In the mud under the use of slurry pumps, due to the special nature of the working environment, need to pay extra attention to the installation and use of methods to ensure its stable and efficient operation, and extend its service life.
The correct installation of slurry pump under the mud liquid
Carefully check the model, specifications and performance parameters of the slurry pump to ensure that it fully meets the design requirements. Only accurately matched equipment can play the best performance in the subsequent work. Comprehensively check whether the parts and components of the slurry pump are complete, there is no damage or corrosion. Any small missing or damaged parts may affect the installation and operation of the whole pump. Carefully clean up the installation site to ensure that the installation foundation is level, firm, and free of debris and stagnant water. A good installation foundation is an important prerequisite to ensure the stable operation of the slurry pump. Prepare the tools and materials needed for installation in advance, such as wrenches, screwdrivers, sealant, gaskets and so on. Adequate preparation can make the installation process smoother and more efficient.
Installation of the pump body: place the pump body of the slurry pump carefully on the installation foundation, use the level meter and other tools to carefully adjust the level and verticality of the pump body, so that it strictly meets the design requirements. The deviation of level and verticality will affect the operating efficiency and life of the pump, so it must be adjusted precisely. After the adjustment, firmly fix the pump body on the mounting base with solid bolts to ensure that no displacement will occur during operation. Installation of impeller: Install the impeller accurately on the pump shaft and fix the impeller firmly with suitable nuts. Pay special attention to the installation direction of the impeller should be consistent with the direction of the arrow on the pump body, otherwise it will lead to the pump can not work properly. Installation of sealing device: according to the use of slurry pump requirements, carefully select the appropriate sealing device, such as packing seal, mechanical seal and so on. Install the sealing device carefully on the pump shaft, and carefully adjust the tightness of the sealing device. The tightness of the sealing device is crucial, too loose will lead to leakage, too tight will accelerate the wear of the seals, so it is necessary to find an optimal balance between ensuring sealing performance and avoiding excessive wear. Installation of the motor: Install the motor smoothly on the motor base and keep it concentric with the pump shaft by fine-tuning the position of the motor. The concentricity directly affects the transmission efficiency of the motor and pump and the service life of the equipment. Then, connect the motor and pump shaft with a high-quality coupling, and accurately adjust the coupling gap so that it meets the design requirements. Improper adjustment of the coupling clearance will lead to increased vibration, reduced transmission efficiency and other problems. Installation piping: according to the slurry pump import and export size and location, reasonable installation of import and export piping. The connection of pipelines must be firm and sealed to avoid any leakage. At the same time, attention should be paid to the arrangement of the pipeline should be scientific and reasonable, to avoid the pipeline is too long, too much bending or the existence of dead ends, so as not to affect the smooth flow of slurry. Too long pipeline will increase resistance, too much bending will lead to increased local pressure loss, and the existence of dead ends may make the slurry silt, affecting the normal operation of the pump.
Comprehensively check whether the installation of the slurry pump is firm, whether the connection of the components is tight, whether there is any looseness or leakage. Any looseness or leakage may cause serious problems during operation, so it must be carefully checked. Check whether the motor is correctly steered by tapping the motor. If the motor is incorrectly steered, the motor wiring should be adjusted promptly. Wrong motor steering will not only prevent the pump from working properly, but may also cause damage to the equipment. Fill the slurry pump with clean water and carry out a test run. Trial run time is generally 2 – 4 hours, during which you should pay close attention to observe the operation of the slurry pump, such as abnormal noise, vibration, leakage and so on. If problems are found, it should be immediately shut down to check, troubleshooting and then test run. Trial run is an important test of the quality of the installation, but also to ensure that the normal operation of the equipment is a key step. In the process of trial operation, the flow and head of slurry pump should be gradually adjusted to meet the design requirements. At the same time, should always pay attention to observe the current and power of the motor to avoid motor overload operation. Motor overload will lead to motor overheating, damage, and even cause safety accidents, so it must be strictly control the motor’s operating status.
Reasonable use of slurry pump under slurry liquid
Carefully check whether the parts of the slurry pump are intact, damaged or loose. Any small problem may be amplified during operation and affect the normal work of the equipment. Carefully check whether the import and export pipelines of the slurry pump are firmly connected, well sealed and leak-free. The connection and sealing condition of the pipeline is directly related to the efficiency and safety of slurry transportation. Inject clean water into the slurry pump for pre-lubrication, and also check the sealing performance of the sealing device. Pre-lubrication can reduce the wear and tear when the equipment starts, while the sealing performance determines whether leakage will occur. Check whether the wiring of the motor is correct and whether the insulation resistance of the motor meets the requirements. Correct wiring and good insulation performance is an important guarantee to ensure the safe operation of the motor. Check whether the control system is normal and whether the indication of each instrument is accurate. The normal operation of the control system and instrumentation can provide the operator with accurate information, so as to facilitate timely mastery of the operating status of the equipment.
Before starting the slurry pump, should open the import and export valves, so that the slurry filled with pump body and pipeline. This can avoid pump damage to seals and bearings due to idling during startup. Then, start the motor and gradually adjust the motor speed to make the flow and head of the slurry pump reach the design requirements. In the adjustment process, it should be carried out slowly, avoiding sudden increase or decrease of flow and head, so as not to cause impact on the equipment. In the process of slurry pump operation, should pay close attention to observe the indication of each instrument, such as pressure, flow, current and so on. If abnormalities are found, it should be stopped in time to check and remove the fault before continuing to run. For example, high pressure may be caused by pipe blockage or abnormal working condition of the pump, and low flow may be caused by impeller wear or pipe leakage. Only timely detection of problems and solutions can ensure the stable operation of the equipment. Regularly check the operation of the slurry pump, such as whether there is any abnormal noise, vibration, leakage and so on. At the same time, attention should be paid to check the sealing performance of the sealing device, if there is leakage should be timely adjustment or replacement of seals. Abnormal noise and vibration may be caused by loose equipment parts, wear and tear or imbalance, etc., while the leakage of the sealing device will not only affect the slurry conveying efficiency, but also may cause pollution to the environment. Regularly clean the inlet and outlet pipelines and filters of the slurry pump to avoid clogging of the pipelines and clogging of the filters, which will affect the flow of the slurry. Pipe clogging and filter clogging will lead to a decrease in the flow rate and head of the pump, and may even prevent the pump from working properly. Therefore, regular cleaning is an important measure to ensure the normal operation of the equipment.
Before stopping the pump, the inlet and outlet valves should be closed and then the motor should be stopped. This can avoid slurry backflow after the pump stops running, causing damage to the pump and piping. After the shutdown, the residual slurry in the slurry pump should be cleaned up in a timely manner to avoid the slurry solidifying and blocking the pump and pipelines. Residual slurry solidification will increase the difficulty of cleaning, and may even damage the equipment. Therefore, it should be cleaned up as soon as possible after the shutdown. Regular maintenance of the slurry pump, such as replacing seals, lubricating bearings, checking the motor and so on. At the same time, attention should be paid to check the wear and tear of the slurry pump, if there is serious wear and tear should be timely replacement of parts. Maintenance is to extend the service life of the equipment is an important means, only do a good job of maintenance work, in order to ensure that the equipment is always in good operating condition.
Slurry pump in the slurry liquid under the use of precautions
Select the appropriate slurry pump model and specifications, according to the nature of the mud, flow, head and other parameters for selection. Different slurry nature of slurry pump requirements are different, for example, containing larger particles of slurry need to choose a strong wear-resistant pump, and high viscosity slurry need to choose a pump with greater power.when installing the slurry pump, should ensure the level and verticality of the pump body, avoid the pump body tilt affecting the flow of slurry and the service life of the pump. The tilt of the pump body will lead to imbalance of the impeller, increase the vibration and wear and tear of the equipment, and also affect the efficiency of slurry transportation. Regularly check the sealing device of the slurry pump, if leakage is found, the seals should be adjusted or replaced in time. Leakage of the sealing device will not only affect the slurry conveying efficiency, but also may cause pollution to the environment, and even cause safety accidents. Avoid running the slurry pump without water or low liquid level, so as not to damage the pump sealing device and bearing. No water or low liquid level operation will make the pump seals and bearings do not get enough lubrication and cooling, thus accelerating wear and damage. During the operation of the slurry pump, the current and power of the motor should be carefully observed to avoid motor overload operation. Motor overload will lead to motor overheating, damage, and even cause safety accidents. Therefore, the speed and load of the motor should be reasonably adjusted according to the actual operation of the equipment. Regularly clean the import and export pipelines and filters of the slurry pump to avoid clogging of the pipelines and clogging of the filters, affecting the flow of slurry. Pipe clogging and filter clogging will lead to a decrease in the flow and head of the pump, and may even prevent the pump from working properly. Therefore, regular cleaning is an important measure to ensure the normal operation of the equipment. When carrying out maintenance on the slurry pump, it should be shut down and cut off the power supply first to avoid safety accidents. Maintenance process, may need to disassemble and repair the equipment, so must ensure that the equipment is in a safe state, to avoid accidents. When using slurry pumps in cold areas, attention should be paid to anti-freezing measures to avoid freezing damage to the pump body and piping. In cold areas, the slurry may freeze, which may lead to rupture of the pump body and piping. Therefore, appropriate anti-freezing measures should be taken, such as heat preservation and heating.
Conclusion
The correct installation and reasonable use of slurry pumps under the slurry liquid is extremely important for improving production efficiency, reducing operating costs and extending the service life of the equipment. In the installation and use of slurry pumps, should be strictly in accordance with the operating procedures, strengthen the maintenance of equipment, troubleshooting in a timely manner to ensure the normal operation of the slurry pump. At the same time, should be based on the nature of the slurry and the use of requirements, select the appropriate slurry pump models and specifications to meet the production needs. Only in this way can we give full play to the performance advantages of slurry pumps and provide reliable protection for industrial production.
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