The Development Trend Of Energy-saving Technology Of Water Pump Is Analyzed

1, the trend of water pump energy-saving technology in our country
At present, many electric drive occasions at home and abroad have been widely used in the general machinery, textile, printing and dyeing, paper, steel rolling, chemical and other industries of AC motor stepless speed regulation, has achieved obvious energy-saving effect and meet the process and automatic speed regulation requirements. However, it has not been fully applied in the field of fan and pump application. The main reason is that the load of fans and pumps can be a lot of energy saving is not enough. Therefore, we will introduce the energy-saving principle and application of fans and pumps to customers. The electricity consumption of fans and pumps in the country accounts for more than 60% of industrial electricity, if we can make full use of frequency converters in this field for variable frequency stepless speed regulation, it is a strategy for our development of processing and manufacturing industries and countries that are seriously short of electricity.
Take fan as an example; Natural ventilation cooling tower, circulating water pump, circulating water pipeline and pipeline accessories are important components of circulating water system in power plant. It is of positive significance to study the system scheme and determine the optimal system configuration in the preliminary design of power plant. The core part of circulating water system design is the reasonable selection and configuration of natural ventilation cooling tower and circulating water pump. In the construction of circulating water system, they have the largest investment cost and the most complex construction, and have the greatest impact on the total investment of the power plant. It directly affects the unit cost of power engineering construction and the recovery period of power plant investment. The optimal design of water supply system is the basis of system scheme selection, in which the annual cost of circulating pump motor is the biggest influence on scheme design. On the premise of ensuring the safe operation of steam turbine and full load power generation, how to reduce the annual cost of the motor is worth thinking about by every engineer.
2, the pump in the use of the problem to be solved
At present, China's pump design is mainly followed the traditional model conversion method and speed coefficient method, these design methods are outdated to some extent, multistage centrifugal pump because it is based on the old pump design experience, in the design process can not exceed the past design level, can not make a breakthrough in efficiency improvement. Coupled with the insufficient capital investment and personnel investment of the pump design unit on technology, the lack of innovation power and the lack of innovation consciousness of the pump design personnel, resulting in the technical content of the pump product can not be a qualitative improvement, the technical content of the pump itself can not be improved, and the energy saving work can not be done naturally. In addition, the pump manufacturing enterprises one-sided focus on economic benefits, while ignoring the energy-saving work of the pump, the state has no policy support and financial incentives in this regard, resulting in the pump manufacturing enterprises to pump energy saving, improve the efficiency of the pump has no enthusiasm.
Water pump energy saving there are misunderstandings
In the past, people's understanding of pump energy saving is mainly to improve the efficiency indicators of the pump, in fact, this is a misunderstanding of the understanding of pump energy saving, is a one-sided understanding. What we call the energy saving range is not only an efficiency indicator, but also includes the stability of the performance of the pump, the life of the pump, the saving of materials and other aspects of the factors. Then, specific to the use of the pump environment, we should also be targeted for energy-saving design, such as the sealing performance of the pump, the hydraulic performance of the pump, the high temperature resistance of the pump, etc., which should be designed for different environments and not for different uses. Therefore, the energy saving research of the pump is a very complex work, and our understanding of the concept of energy saving can not be too one-sided, but to have a comprehensive understanding of the whole.
Use unit and individual factors
The use of units and everyone in the purchase of water pumps, often concerned about whether the pump is in line with their own needs, the price is not relatively cheap, and the energy-saving technical indicators of the pump, but not very concerned. This demand from consumers has also eliminated the enthusiasm of pump design units and manufacturing units to carry out energy-saving technological innovation. And a large number of consumers in the choice of water pumps, to choose the flow and head margin is too large to ensure that they can meet their own use needs, such consequences will directly cause the pump in the use of the process, the actual operating efficiency is far lower than the maximum efficiency of the pump, has not been able to operate in the high efficiency zone. In addition, in the process of use, due to the management and inspection of the use unit is not strict, the operation and maintenance is not appropriate, the maintenance is not timely, so that the pump often fails in the process of use, resulting in a lot of energy waste.
3, water pump energy-saving technology way
Energy saving of the pump itself
In the process of designing and manufacturing pumps, the design and manufacturing personnel must have a sense of energy saving in their minds, and as the design and manufacturing units of pumps, they have the responsibility to provide efficient and energy-saving pump products to the vast number of consumers. The design unit of the pump should choose excellent hydraulic model in the design, research scientific and efficient hydraulic design method, in the design process, to carry out the reliability test of the pump, the material selection test of the product, so as to improve the use efficiency of the pump product. Pump manufacturing units in the manufacturing process to develop their own enterprise standards higher than the national mechanical standards, and find ways to reduce hydraulic losses. In the manufacturing process, the process is strictly controlled, the roughness of the flow parts is minimized, the gap is carefully treated, and the gap value is appropriately reduced, so as to improve the efficiency of the pump and achieve the purpose of energy saving of the pump.
Improve pump system energy saving
In addition to paying attention to the energy saving of the pump product itself, we should also pay attention to the development and research of the energy-saving technology of the entire system, the efficiency of the pump and the related supporting facilities also have a great relationship, the system energy-saving technology is even more important than the energy saving technology of the pump itself. The research on energy saving technology of the system should focus on carrying out system engineering design from the perspective of energy saving, so that each link of the component system can achieve the best matching effect, and the entire pump system can exert its maximum efficiency during the operation of the pump. In this regard, it mainly includes the connection of the pump and the motor, the design of the pipe network, the connection and coordination of the relevant accessories, so that they can play their maximum role, so as to improve the efficiency and service life of the pump system.
Energy saving in pump operation
The efficiency of the pump itself has been improved, and the entire pump system has also been designed to save energy, but this is only one aspect, and there is a very important aspect in the operation of the pump. In practice, often due to the improper use of the pump, the pump can not effectively play its role, coupled with the use of the pump environment is very complex, different environments require different process flows and process parameters, in the use of these aspects should be flexibly adjusted. For example, when adjusting the pump system, we should pay attention to minimize the loss of energy, use less throttling regulation, and solve the problem from the Angle of variable Angle, variable speed, turning, etc., to ensure that the motor and the pump can work efficiently. When installing the pump oyster, the Angle of the consumption impeller should be adjusted according to the requirements of the specific use environment, and the installation Angle of the blade should be reasonably determined, so that the pump can work efficiently. Turning adjustment refers to the impeller diameter to adjust the water pump, which is the most simple and aspect of energy saving measures, there is a common sense in turning adjustment is the flow, head, shaft power before and after turning the impeller diameter, diameter square, diameter square is proportional to the third power. One of the problems to pay attention to when using turning regulation is that the regulation should be adjusted within a safe range, and cannot be adjusted without limit. Variable speed regulation is the most direct and most commonly used adjustment method in daily use, which does not produce power loss, and directly changes the performance of the pump by changing the speed of the pump. In daily life, the main realization methods are realized through the gear gearbox, through the belt drive, through the frequency conversion, through the motor and so on.
In the above ways, the most ideal way is frequency conversion speed regulation, the advantages are high efficiency, stepless adjustment speed, and wide speed regulation range, but the disadvantage of application is that the investment is higher.
Energy saving of using units and individuals in the use of water pumps
According to the use of the environment, choose a reasonable pump system, in the operation and use of the process, the use of units and individuals should also establish a sense of energy saving, strict management, in order to make the pump in the operation process to achieve energy saving. At the same time, in the process of action, it is necessary to frequently maintain and maintain the pump system, so that the pump system can be in the best operating state, and through the usual maintenance to find the problems in the pump system, maintenance and maintenance, both to extend the service life of the pump, but also to improve energy saving benefits, increase work efficiency.