Petrochemical industry is called petrochemical industry for short. Petrochemical industry is a basic industry, which provides supporting services for agriculture, energy, transportation, machinery, electronics, textiles, light industry, architecture, building materials and other industries and people's daily life, and occupies a decisive position in the national economy. The following is what I have carefully prepared for you: related papers on the application of electrical energy-saving technology in petrochemical design. The content is for reference only, welcome to read!

The full text of the application research of electrical energy-saving technology in petrochemical design is as follows:

1 overview

Energy, as the driving force of development in the new century, restricts the development of national economy and is related to a country's economic security and even national security. At present, China is the second largest energy consumer and energy producer in the world. With people's knowledge and understanding of energy consumption, environmental pollution and other related issues, people attach great importance to the energy situation. Major enterprises are establishing energy management systems and widely applying energy-saving and emission-reduction technologies. Nowadays, petrochemical enterprises are facing a series of problems in energy consumption, such as low energy utilization efficiency, serious energy waste, and inadequate awareness of energy-saving management, which forces petrochemical enterprises to speed up the application of electrical energy-saving technology in engineering design.

2 Overview of electrical energy-saving technology

Electrical energy saving technology is mainly considered from three parts: power system energy saving, lighting system energy saving and electronic equipment energy saving. For a petrochemical enterprise, electrical equipment occupies most of the production line, so energy saving in power system is the focus of the whole electrical energy saving. Energy saving in lighting system, electronic devices, large-scale integrated circuits and motor drive control can not be underestimated.

Electrical energy saving needs to meet the following three principles: First, it must meet the basic functions of the production device and ensure the safety and reliability of the production device. On the premise of giving consideration to production technical performance, consider reducing energy consumption and improving production economic indicators; Secondly, to meet the economic requirements, we should consider energy saving and investment payback period; The last principle should be from the perspective of energy conservation, taking into account energy conservation and environmental protection.

Application of electrical energy-saving technology in engineering design of petrochemical enterprises

3. 1 power system energy saving

Power system energy saving should be discussed from four aspects: transformer selection, improving system power factor, line power loss and reducing higher harmonics:

3. 1. 1 transformer selection. Transformer is a common electrical equipment in power system, especially in petrochemical enterprises, a large number of transformers are put into use. 7×24 hours, the consumption of electric energy is also quite large. Usually, when we choose a transformer, we need to choose it according to the load rate of the transformer.

In addition, in order to improve the economic benefits of petrochemical enterprises and reduce energy consumption in the production process, it is suggested that the selection of transformers in engineering design should adopt national new high-efficiency and energy-saving products.

3. 1.2 Improve the power factor of the system. Power factor plays an important role in power system. If the power factor can be improved, it means that the utilization rate of energy will be improved, while the production and power costs and line voltage will be reduced accordingly, and the utilization rate of equipment will be greatly improved. Petrochemical enterprises will get maximum economic benefits with minimum investment. Most electrical equipment works according to the principle of electromagnetic induction, such as distribution transformers and motors. They all rely on the establishment of alternating magnetic field to convert and transfer energy.

When the power factor of the electrical system infinitely tends to 1, the reactive power in the circuit is small, which means that the higher the apparent power utilization ratio, the greater the power of power transmission, so the circuit loss can be reduced by increasing the power factor. Generally speaking, there are two ways to improve the power factor, natural improvement and artificial compensation. It is relatively simple to improve the power factor naturally, mainly in the selection of motor, choose the appropriate motor and transformer to avoid the motor running with no load. The second manual compensation method mainly adopts synchronous motor compensation, dynamic reactive power compensation and shunt capacitor compensation.

3. 1.3 Reduce the power loss of the line. According to the formula P=I2R, as long as the current passes through the resistive medium, energy consumption will occur. Then in a big project, there are hundreds of equipment and equipment lines, and reducing the power loss of the lines has a considerable contribution to electrical energy saving. According to R=ρL/S, it can be concluded that the line loss can be effectively reduced by reasonably designing the direction of electrical lines, reducing the line length L and reasonably selecting the line thickness S in engineering design.

3. 1.4 to reduce higher harmonics. The frequency of alternating current used in China is 50 Hz. When the sine wave is disturbed by the outside world, it will be distorted. The more serious the distortion, the greater the harmonic component and the smaller the fundamental component. In the power grid system with higher harmonic voltage and current, only the fundamental part of the power grid voltage and current plays a role in the normal operation of the motor, while the higher harmonic current and voltage part of the system can only produce active loss and additional reactive loss. At the same time, higher harmonics will produce overvoltage and overcurrent, which will directly affect the reliability of work.

In order to solve the higher harmonics of power grid, passive filtering technology is mainly used to absorb higher harmonics, and active filtering technology is composed of advanced electronic control and power electronic devices. By detecting the instantaneous distortion waveform of the system, the opposite distortion waveform is generated to offset it, thus outputting the standard sine wave.

3.2 Stabilizing voltage and saving energy

The power supply efficiency of the system is the highest when the power supply voltage is stabilized at the rated voltage. The voltage is unstable, and high voltage and low voltage cannot form efficient power supply. Most electrical equipment has the highest efficiency at rated voltage. If the power supply voltage is higher than the rated voltage, it will produce too high no-load current, resulting in a waste of energy. If the power supply voltage is lower than the rated voltage, excessive load current will be generated under the condition of constant load, which will lead to increased line loss and waste of energy. In order to choose a suitable power supply voltage, if the pressure changes too much, a transformer with an on-load tap changer can be used.

3.3 Energy saving of lighting system

On the premise of meeting the demand of normal lighting, energy-saving lamps, electromagnetic induction lamp and LED lamps with high light efficiency and low energy consumption are preferred. These lamps have long service life and low energy consumption, which meet the requirements of energy saving.

The standard voltage of China's power grid is 220V, but there is a voltage deviation of-10% ~-7%. Excessive voltage passing through the lighting system will generate a lot of heat, which will also affect the life of lighting equipment. By controlling the loop voltage in the lighting system, electric energy can be saved and the service life of lighting equipment can be prolonged.

3.4 Energy saving of electronic equipment

In petrochemical enterprises, the energy saving of electronic equipment mainly includes the energy saving of working computers, printers and photocopiers and the energy saving of industrial PID control systems. In daily work, every employee of an enterprise needs to get into the habit of turning off the computer monitor conveniently and turning off the computer after work, and try to set it as a power-saving mode when using the operating system. In addition, printers and copiers choose to stand by or shut down directly when not in use to reduce power consumption. When designing PID control system in industry, choose low power consumption module.

4 conclusion

In today's energy shortage, all walks of life are busy saving energy and reducing emissions. For petrochemical enterprises, electrical energy saving is an important work. It is hoped that all aspects of electrical energy saving will be fully considered at the beginning of engineering design, which can effectively reduce the cost of electrical energy consumption, bring more economic benefits to petrochemical enterprises and contribute to the development of enterprises.