Discussion on the application of electrical automation in energy-saving production of coking enterprises

Discussion on the application of electrical automation in energy-saving production of coking enterprises

In many aspects of personal growth, everyone has been exposed to papers. With the help of the paper, we can achieve the purpose of discussing problems and conducting academic research. So how to write a good paper? The following is my discussion paper on the application of electrical automation in energy-saving production of coking enterprises. Welcome to reading. I hope you will like it.

abstract:

With the continuous development of modern scientific information technology, China's electrical automation has also got the opportunity of rapid development. In this case, the industrial electrical automation of traditional coking plants has also begun to realize its own sustainable development with the help of new technologies. More and more coking plants begin to integrate the concept of energy saving and emission reduction into practice when carrying out production work. Under this background, this paper discusses and explains the application of industrial electrical automation technology in energy saving of coking plant in detail.

Key words:

Energy-saving projects; Coking plant; Industrial electrical automation; Applied research;

Introduction:

With the rapid development of China's economy, the development of various technologies is also changing with each passing day. As a bridge connecting various industries, automation technology provides a great impetus for social development. China immediately realized that the green industrial revolution is the mainstream of future social development, and began to actively call on coking enterprises to carry out green production technology, and integrated industrial electrical automation technology into energy-saving production in coking plants, which laid a good foundation for the promotion of economic and social benefits of enterprises.

1, energy-saving technology of coking plant

As a professional factory specializing in metallurgical coke production, smelting, coking products, processing and recycling, the Coking Plant has improved its production efficiency and effectively reduced the consumption of manpower, material resources and financial resources in the daily production and smelting process, thus achieving the improvement of the economic benefits of the Coking Plant to a certain extent. However, with the increasingly strict national management, high energy consumption and heavy pollution have once become synonymous with coking, and whether it can be sustainable has become the focus of coking industry. Coking plants also realize that only energy conservation and emission reduction can achieve sustainable development, so it is particularly critical to improve energy conservation and environmental protection in the production process of coking enterprises. Under this trend, the application of industrial electrical automation energy-saving technology has played a key role, providing a steady stream of power for the sustainable development of coking enterprises and improving the automation control level of the whole industry.

2. Application measures of industrial electrical automation in energy-saving technology in coking plant.

2. 1 electrical technology

In order to effectively improve the environment of coking plant and improve the energy-saving efficiency of equipment, coking enterprises are currently popularizing and applying new technologies from the following aspects.

1) new technology. With the large-scale use of medium voltage inverter in coking enterprises, the industrial electrical automation control level of coking plant has been improved, and the effect of high efficiency and energy saving has been achieved. However, in the actual operation process, the function of frequency converter is not obvious, and most of them are manually set to a fixed frequency, which is difficult to interlock with the equipment. With the rapid development of wireless communication technology, it has added a powerful means for the automatic control of equipment. For example, the high-speed and low-speed interlocking of coke discharge and dust removal can be interlocked through wireless communication, and the operation of the discharge port can realize the interlocking of coke screening and dust removal.

2) New equipment. In addition, in order to save a lot of electricity in the normal production process, mature energy-saving power equipment can be applied to actual production, and the lighting at the production site is all LED lighting, and two places are controlled in the belt corridor to achieve the purpose of energy saving. Road lighting is automatically controlled by industrial interconnection and remotely controlled by mobile APP. At the same time, the line load can be optimized by adjusting the power load of each loop, so that the whole industrial power consumption can provide high operating efficiency for production and reduce energy consumption.

3) New management. Motor selection in new projects should be strictly in accordance with the national green development requirements, try to choose first-class energy-efficient motors, and resolutely put an end to the selection of high-energy-consuming motors prohibited by the state; Through a series of new management to achieve the purpose of energy saving.

2.2 Automation technology

With the rapid development and wide application of industrial electrical automation technology in coking plant, the complex transformation has become more and more simple, which has played a very good role in energy-saving production. Through process optimization combined with automatic control technology, the details in the production process were deeply excavated and reformed, and obvious economic benefits were achieved while optimizing the process. The successful cases are listed as follows:

1) control optimization of dust scraper in dust removal system. According to the original design, the scraper of dust removal system is a kind of continuous operation equipment. Because there are many dust removal equipment in coking plant, the scraper consumes a lot of energy. In order to solve this problem, process technicians optimize the software through automation technology, re-program the software without increasing hardware investment, and realize the intermittent operation of the scraper according to the actual production situation on site. This coking plant alone can save more than 300,000 kWh of electricity every year, creating considerable economic value.

2) The control room of the whole plant is integrated. In the past, the control rooms of most coking plants were distributed control rooms. According to the mainstream of production technology, they are: coal preparation and blending control room, coking control room, chemical production control room, coke transportation control room and production dispatching room. The advantages are obvious: convenient connection between production and on-site inspection, and quick response in case of failure. Disadvantages are: too many people, difficult equipment management, unable to achieve unified management of the whole plant. According to this situation, most mainstream coking enterprises have built or completed centralized control centers. Advanced automation technology has been adopted to realize the integration of the control room in the whole plant, and good economic and social benefits have been achieved. After the integration of all control rooms, the production efficiency is greatly improved, the staffing is saved, the number of operators can be reduced by 50%, and the level of equipment automation control has also been greatly improved.

2.3 production technology

In recent years, the technology of coking industry has also been greatly improved, but the effective application of automation technology in new technology can achieve good energy-saving effect and economic benefits. The following are some mature cases of the application of process technology and automation technology in the field of energy saving, hoping to learn from the same industry and make common progress.

2.3. 1 combustion equipment for desulfurization and denitrification process and VOC process.

With the more and more strict requirements of coking environmental protection, new technologies have blossomed everywhere in coking plants in recent years. While carrying out environmental protection rectification and process transformation, we must consider all aspects to save investment and operating costs. It is best to link the control system of all new transformation processes with advanced control technologies to realize a unified platform for big networks and big data. The desulfurization and denitrification process equipment includes the regenerative combustion system of denitration catalyst, but the utilization rate is very low, and it only runs for about 15 days in two years. The best way to deal with gas odor by adding VOC treatment process is combustion, and the distance between the two processes is far, so advanced automation control technology can combine the two control systems well, and the two processes use advanced automation technology to realize the use of combustion system. Realize the saving of investment and operating expenses, and finally achieve the purpose of energy saving, and achieve good economic and environmental benefits.

2.3.2 Application of CDQ medium pressure steam in coal moisture control process

At present, CDQ technology is becoming more and more popular in coking enterprises. This process realizes the utilization of coke waste heat to generate electricity, and at the same time improves the quality of coke. At the same time, it also produces a lot of steam. The technology of coal moisture control is to indirectly heat coking coal by steam, remove the moisture of coking coal before charging into coke oven, and keep the moisture of coal within the range of about 9%, and then carry out charging and coking operations. In the actual production process, after CDQ steam passes through the temperature and pressure reduction device, the pressure of CDQ steam is controlled within the technological requirements by using advanced industrial electrical automation technology, which is widely used in coal humidity control system. In order to ensure the safety of production and operation, a safety interlock system is set between the two control systems to interlock the steam pressure, flow rate and temperature with the operation of the coal humidity control system, so as to realize safe, stable and continuous operation. At present, this technology has been applied in industry and achieved good energy-saving effect. It not only saves the heating gas of the coke oven, but also reduces the amount of residual ammonia and reduces the production load of the wastewater treatment device. It can be seen that this technology fundamentally improves the application quality of coke, reduces the resources consumed by coking, and further conforms to the policy of energy saving and environmental protection.

2.3.3 riser waste heat utilization technology

In the coking process of the coking plant, the temperature of raw gas coming out of the carbonization chamber is about 650~750℃, and its heat accounts for about 36% of the total output heat of the coke oven. Due to the influence of process technology, part of the heat of coking plant is lost in the riser, and the temperature at the top of the tower is too high. In recent years, with the continuous development of new technology, the waste heat utilization technology of riser has gradually begun to be widely promoted. Automatic control technology can stabilize the outlet pressure of the device and realize industrial continuous operation. The recovered steam is used in the recovery process of chemical production to improve the application efficiency of internal heat in coking plant and realize the application of energy-saving technology in the industrialization of coking plant.

2.3.4 Optimal control of coke oven heating

Before the coke cake of coke oven is immature, judging by the time, the coke cake is burnt and immature, which is easy to cause environmental protection and quality accidents. At present, the optimization control technology of coke oven heating is constantly developed and updated to meet the production requirements, which can adjust the flow rate of heating gas and the intensity of flue gas distribution in real time, automatically predict the maturity of coke through fire drop management, monitor the number of high and low temperature furnaces and abnormal furnaces in real time, and monitor and guide the height and horizontal uniformity of heating in real time, thus greatly reducing gas under the condition of meeting the process.

2.4 Other aspects

During the operation of industrial electrical automation system in coking plant, power will be emitted in the form of heat, especially those components with large power consumption, such as high-power transistors, resistors and transformers [3]. In addition, when the working environment temperature of the electrical system is high, the heat generated when the equipment works is not easy to dissipate, which leads to the temperature rise of the equipment. For example, semiconductor devices are very sensitive to temperature changes. If the temperature is too high, the gain of the device operating point will be unstable, the signal will be distorted, drift will occur and noise will increase. What's more, it will lead to thermal breakdown. Therefore, the temperature of the semiconductor device itself should not be too high, so the heat dissipation problem should be fully considered when selecting equipment. Make use of the characteristics of the equipment as much as possible to solve the heat dissipation problem. Do not add new heat dissipation equipment to increase the process energy consumption, especially the heat dissipation of the medium-voltage inverter. Use the cooling fan of the equipment itself to pump hot air out of the inverter room through the air duct as much as possible, and reduce the configuration of the indoor air conditioner of the inverter, thus saving more than 20,000 kW h/set of electric energy every year.

3. Strengthen energy-saving management knowledge training.

In the terminal energy utilization, electric energy is one of the main forms of energy and an excellent energy carrier. People's lives, especially industrial production, are mostly based on the utilization of electric energy, which accounts for a large proportion in the terminal utilization, and so is the coking plant. With the rapid development of industrial electrical automation technology, it provides a powerful means for scientific and rational use of energy. However, some coking enterprises are not aware of energy conservation and have low enthusiasm. The main reason is that they lack knowledge of energy utilization and energy-saving management theory and technology, and their development speed as technical equipment is changing with each passing day. Therefore, only by fully ensuring the professional skills of production personnel can we further improve the level of industrial electrical automation system in coking plant and lay a solid foundation for energy saving. Therefore, in order to effectively improve the personnel management ability of the industrial electrical automation system in the coking plant, it is necessary to carry out regular professional upgrading training, so that they can master the development direction and application of the industrial electrical automation system in the coking plant and ensure the safe and stable operation of the industrial electrical automation system in the coking plant.

4. Conclusion

In order to effectively improve the application of industrial electrical automation system in energy-saving technology of coking plant, it is necessary to comprehensively consider equipment selection, technology selection, process optimization and management and maintenance. According to the current technical development, the old control system is reformed while vigorously applying new technology, which improves the technical level of industrial electrical automation system in coking plant and provides great impetus for its future sustainable development.

refer to

Huang Weibin. On the practical application of electrical automation technology in coal industry production [J]. Mining Equipment, 2020 (3):180-181.

[2] Jiang Dong. Application of energy-saving technology in industrial electrical automation [J]. Scientific and technological innovation, 2020(4): 158- 159.

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