In recent years, the issue of energy conservation has been paid more and more attention by the society, and has become a basic national policy of my country's modernization construction. The issue of energy conservation in the process of industrial production is of great significance. To improve the efficiency of centrifugal pumps and motors, in addition to improving the manufacturing process and design level of equipment, reasonable selection, installation, use and maintenance are the key to solving the problem. Today, the editor will talk to you about the energy saving of pumps and motors. To do a good job in energy saving of pumps and motors, we need to pay attention to the following aspects: 1. Safety and reliability of operation Pumps and motors are the driving force for the circulation and transportation of various media in the factory. The safety of their work directly affects the safety and reliability of the entire unit. Abnormal shutdown of the unit will often cause major economic losses. Therefore, to improve the reliability of the unit, in the pump The design and selection of motors are usually necessary to sacrifice efficiency to improve the reliability of the pump and motor as a whole. On the premise of ensuring the safety of the unit, improving the economic performance of the pump and motor is the most important task. 2. Reasonable selection (1) To correctly select the working parameters and margin of the pump and motor, it is necessary to ensure that the working parameters have sufficient margin and to prevent excessive reduction of operating efficiency caused by excessive parameters (2) Selecting high-efficiency and energy-saving products is a prerequisite for improving efficiency. Therefore, reasonable selection needs to understand the performance and specifications of the product series of pumps and motors, as well as the credit of the manufacturer and the evaluation of product quality. (3) Select a suitable prime mover, including reasonably determining the type of prime mover and selecting a prime mover with high operating efficiency. At the same time, when determining the prime mover margin, it is necessary to ensure the safety of operation without causing the prime mover to deviate too much design conditions. 3. Choose the most suitable adjustment method According to the characteristics of unit load changes, the adjustment method of the pump should be reasonably selected. When the unit is under basic load, the economic performance of axial flow guide is the best, and the economic performance of axial flow guide plus two-speed motor is second. The economy of speed is the worst. Since the initial investment and maintenance costs of equipment will decrease with the development and progress of technology, the results of economic analysis will vary with the times. 4. Improve or transform the original pump and motor In order to make the original pump and motor achieve the purpose of saving energy, it is necessary to transform or improve all aspects that cause its low efficiency on the basis of economic analysis. The work in this area mainly includes the following aspects: (1) Select new products with reliable product quality and high efficiency, eliminate and replace those pumps or motors with backward technology, low performance and low efficiency. (2) Choose a more efficient adjustment method and operation method for the operation of the pump and motor. (3) Eliminate the mismatch of other systems by modifying the pump and motor, including redesigning the impeller after calculation, removing the first-stage impeller, cutting or lengthening the blades, and changing the original parameters to achieve The head and flow of the pump better meet the needs of the unit operation. (4) Transformation of the pipeline system, including eradicating problems such as fouling, blockage and leakage in the pipeline, reducing the resistance of the pipeline as much as possible, and making the flow velocity distribution into the pump and motor inlet even. 5. Guarantee the installation and maintenance quality of pumps and motors Improving the installation and maintenance quality of pumps and motors has a significant impact on the economy of their operation. On the one hand, reasonably determine the dynamic and static clearance according to the requirements, which not only reduces the amount of leakage but also does not cause friction, and repairs the profile of the flow parts damaged due to wear or cavitation, and keeps the surface of the impeller disk and the smoothness of the flow channel, these are the influences. The factor of pump efficiency; on the other hand, by reasonably determining the maintenance cycle and improving the quality of maintenance, the service life of the equipment can be extended. 6. Adopt an economical mode of operation Keeping the operating conditions of pumps and motors in the high-efficiency zone is the key to economical operation. First, operators should master the characteristics and status quo of different types of pumps and motors, and use as many equipment and adjustments with good economic performance as possible. Second, operators should keep in mind the high-efficiency operating parameters of various types of pumps and motors, and can timely adjust the operation of pumps and fans and the number of spare units in the case of multiple parallel operations. Third, according to the conditions of use, through the system Carry out economic analysis to determine the number of pumps and motors in operation.
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