The large total output of crude steel poses enormous pressure on energy conservation and emission reduction control

According to the International Iron and Steel Association, in 2011, China's crude steel production was 695.5 million tons, a year-on-year increase of 8.9%; The proportion of global crude steel production has increased from 44.7% in 2010 to 45.5%. According to the "12th Five Year Plan" for the development of the steel industry, it is predicted that in 2015, China's crude steel consumption will be about 750 million tons. The consumption of crude steel in our country may be; Twelfth Five Year Plan; During this period, it entered the peak arc top zone, and the highest peak may occur from 2015 to 2020, with a peak of 770 million tons to 820 million tons. According to industry experts, China's steel production may reach 800 million tons in 2015. Such a huge production of crude steel will inevitably increase the amount of pollutants such as wastewater, exhaust gas, and waste residue. This has brought enormous pressure and challenges to the control of total pollutant emissions in the steel industry. According to preliminary estimates, the energy consumption of the steel industry accounts for about 23% of the total industrial energy consumption and 16.1% of the total national energy consumption; The consumption of new water, wastewater, sulfur dioxide, and solid waste emissions account for about 3%, 8%, 8%, and 16% of the total industrial output, respectively.

Industry experts believe that the steel industry needs to accelerate its development; Transform mode, adjust structure”, Realize structural energy conservation and emission reduction. Firstly, we should strictly follow relevant industrial policies, laws, and regulations such as the "12th Five Year Plan" for the development of the steel industry, increase efforts to eliminate outdated production capacity, and strictly control the blind expansion of steel production capacity. The main task facing the steel industry to eliminate outdated production capacity is to eliminate 48 million tons of iron smelting, 48 million tons of steelmaking, 42 million tons of coke, and 7.4 million tons of ferroalloys by 2015. The second is to vigorously promote high-grade steel such as high-strength steel bars, accelerate the upgrading and replacement of products in production and use, and focus on solving the problem of reducing steel consumption. According to Chi Jingdong, Deputy Secretary General and Chief Analyst of China Iron and Steel Industry Association, if China's steel is generally upgraded by one strength level, it can save 15% to 20% of steel. By only saving 10%, we can save about 70 million tons of steel in one year. Even if the comprehensive energy consumption per ton of steel is reduced to 580 kilograms of standard coal, sulfur dioxide emissions per ton of steel are reduced to 1 kilogram, and chemical oxygen demand per ton of steel is reduced to 0.065 kilograms according to the "12th Five Year Plan" for the development of the steel industry in 2015, it is equivalent to saving 40.6 million tons of standard coal in energy consumption, reducing sulfur dioxide emissions by 70000 tons, and chemical oxygen demand emissions by 4550 tons per year. In this way, there are many constraints that have long plagued the development of the steel industry, such as energy conservation and emission reduction, environmental constraints, shortage of iron ore resources, and high costs; Bottleneck” Naturally, it will be alleviated.

The new pollutant emission standards have sharply increased the pressure on steel enterprises to meet energy-saving and emission reduction standards

On June 7th, the Ministry of Environmental Protection held a meeting to review and approve in principle eight pollutant emission standards, including the "Emission Standards for Pollutants from Iron Ore Mining and Selection Industry", "Emission Standards for Air Pollutants from Steel Sintering and Pelleting Industry", "Emission Standards for Air Pollutants from Ironmaking Industry", "Emission Standards for Air Pollutants from Steelmaking Industry", "Emission Standards for Air Pollutants from Steel Rolling Industry", "Emission Standards for Pollutants from Ferroalloy Industry", "Emission Standards for Water Pollutants from Steel Industry", "Emission Standards for Pollutants from Coking Chemical Industry", etc. After further modifications, they will be released and implemented. After the implementation of these stricter new pollutant emission standards, many steel enterprises will find it difficult to meet the new energy consumption and emission standards with their existing energy-saving and pollutant treatment measures. Some steel enterprises will face the problem of how to further achieve energy conservation and meet emission standards.

According to Huang Dao, Deputy Director of the Development, Science, Technology and Environmental Protection Department of the China Iron and Steel Industry Association, compared with the current standards, the new standards have two advantages: firstly, standardization, which has changed from a single standard to a series of standards for the main production processes of steel, making the prevention and control of characteristic pollutants in each process more targeted; Secondly, emission limits for pollutants such as nitrogen oxides and dioxins have been added; Thirdly, the emission standards for pollutants such as smoke, dust, and sulfur dioxide have been significantly increased; Fourthly, a transition period of 3 to 5 years has been provided for existing enterprises, and emission limits for newly established enterprises will be implemented after 3 to 5 years; Fifth, Beijing Tianjin Hebei, Yangtze River Delta, the Pearl River Delta and other regions are classified as“ Twelfth Five Year Plan; Regions with special emission limits for air pollutants will implement stricter standards.

Huang believes that the overall operation of the steel industry is currently in a state of low profit or even loss, with increasing overcapacity. Although the introduction of emission standards has imposed greater restrictions on the steel industry and increased environmental protection costs, from the perspective of promoting structural adjustment and optimizing economic development through environmental protection, if the scientific, unified, and fair implementation of standards can be ensured during the implementation process, it will be a good thing for the steel industry. This series of new standards was continuously solicited for opinions from the steel industry and enterprises in the form of draft opinions at the end of 2007, indicating that the country is scientific and cautious in promoting the healthy and sustainable development of the steel industry. The steel industry should pay serious attention to the impact of the introduction of standards and related supporting policies on the current production, operation, and costs of enterprises. It is necessary to timely reflect the new problems that may arise during the implementation of relevant new standards in the future. It is recommended that the country introduce corresponding supporting policies to solve the problems of high environmental compliance costs, low illegal costs, and inconsistent standards and policy implementation scales that have long plagued the steel and other industrial industries as soon as possible. Iron and steel enterprises located in Beijing Tianjin Hebei, Yangtze River Delta, the Pearl River Delta and other areas designated as special emission limits of air pollutants will face greater environmental pressure in the future, so they should study and develop solutions and measures in a timely manner.

Cheng Jijun, Deputy Chief Engineer of the Metallurgical Industry Planning and Research Institute, also expressed similar views, believing that the new standards clarify the controversial sulfur dioxide emission standards and add requirements for the emission standards of nitrogen oxides and dioxin pollutants. The implementation of the new standards will increase the environmental costs of steel enterprises, while the tightening of emission standards has put forward higher requirements for governance technology. This is a great challenge for already struggling steel companies.

The arduous task of reducing the total amount of pollutant emissions brings severe challenges

The 12th Five Year Plan for National Environmental Protection proposes that; Twelfth Five Year Plan; During this period, the country implemented total emission control for four major pollutants: chemical oxygen demand, ammonia nitrogen, sulfur dioxide, and nitrogen oxides. By 2015, the total amount of chemical oxygen demand emissions will decrease to 23.476 million tons, a decrease of 8% from 2010; The total amount of ammonia nitrogen emissions will be reduced to 2.38 million tons, a decrease of 10% from 2010; The total amount of sulfur dioxide emissions will decrease to 20.864 million tons, a decrease of 8% from 2010; The total emissions of nitrogen oxides will decrease to 20.462 million tons, a 10% decrease from 2010& hellip; The task of reducing the total amount of pollutant emissions is arduous, which will bring severe challenges to energy conservation and emission reduction in steel enterprises, especially in sintering desulfurization, which is of utmost importance.

According to industry experts; Twelfth Five Year Plan; During this period, the country required the steel industry to fully implement sintering desulfurization, and the total amount of sulfur dioxide emissions should be reduced by 39%, reaching the international advanced level of less than 1 kilogram per ton of steel emissions. At the same time, the steel industry has also been included in the full caliber accounting industry. At present, only the power and steel industries adopt full caliber accounting for SO2, while the thermal power and cement industries adopt full caliber accounting for nitrogen oxides. These four industries are“ Twelfth Five Year Plan; The key full caliber accounting industry. In order to implement the full caliber accounting of SO2, relevant national departments organized verification work on sintering desulfurization in some regions at the beginning of this year. From the verification situation, it can be seen that the sintering desulfurization work of steel enterprises is not optimistic: the comprehensive desulfurization rate of the entire industry is only 47.3%, and many desulfurization facilities are not constructed in a standardized manner. Some facilities are of low quality and low price. In 2011, there were 25 desulfurization facilities in China with a comprehensive desulfurization rate of 0 and zero emission reduction, which were deducted from the emission reduction. Some enterprises even had to demolish and rebuild their desulfurization facilities. How to ensure the efficient operation of sintering desulfurization facilities is the next challenge facing desulfurization work.

Regarding the challenge of carbon emissions, Professor Zhang Qi from the Institute of Thermal Energy and Environmental Engineering at Northeastern University told China Metallurgical News that overall, there is a significant gap between China and foreign countries in terms of CO2 emission calculation and CO2 reduction technology research and development. The scientific calculation of CO2 emissions is an important basis for the country to understand the CO2 emissions situation of the entire steel industry and formulate scientific assessment standards. At present, many European countries have established relevant standards for carbon taxes, such as Australia, which will levy a carbon tax of AUD 23/ton starting from July 1st. In the near future, China's steel industry will also face the severe challenge of carbon tax; Exam questions;, How to be proactive, starting from the process route, technical equipment, and management level, and scientifically utilizing the method of calculating CO2 emissions to achieve a double harvest of economic and social benefits, is a problem that Chinese steel enterprises need to seriously consider. At the same time, as the energy consumption per ton of steel can no longer objectively and accurately reflect the CO2 emissions of steel production, the steel industry urgently needs to establish scientific standards for CO2 statistics and benchmarking to guide the scientific production of the entire industry.

In addition, Director Huang emphasized that as the country strengthens the total control of pollutant emissions, the total amount of pollutant emissions has become one of the main factors in enterprise development planning, and has become another form of '...'; Assets”, So the fairness of the original allocation will become a difficult and hot topic.

Accelerate technological innovation and break through energy-saving and emission reduction technologies; Bottleneck”

“ Twelfth Five Year Plan; The period is a time when China's steel industry's energy conservation and environmental protection work is facing new situations and pressures such as low-carbon economy and stricter pollutant emission standards. It is a transition from single technology and single process pollution prevention to the synthesis and system optimization of energy conservation and environmental protection technologies. How to accelerate technological innovation, promote the integration and optimization of energy-saving and environmental protection technologies, and break through energy-saving and emission reduction technologies; Bottleneck ";, Also; Twelfth Five Year Plan; A difficult point for the steel industry to improve energy conservation and emission reduction levels. Research shows that the contribution rate of technological progress to energy conservation and emission reduction will reach 40% to 60%.

According to Director Huang, currently in the steel production process, we still have some energy-saving and emission reduction technologies; Bottleneck” Or“ Fortress;. For example, the stable compliance of sintering electrostatic precipitator, economical and stable sintering flue gas desulfurization technology, comprehensive technology and interface between desulfurization technology and removal of pollutants such as dioxins, NOx, heavy metals, etc. in flue gas, the immaturity of domestic sintering (pellet) denitrification technology, the resource and harmless treatment of desulfurization by-products, the increased energy consumption of sintering environmental protection facilities, the impact and constraints of poor sintering production equipment and process stability on the full play of energy-saving and emission reduction technology, the economical and efficient utilization of waste heat from low-temperature flue gas sintering, the lack of effective recycling technology for blast furnace slag and steel slag sensible heat in China, and the incomplete recovery and utilization of sensible heat from coke oven waste gas, sintering and coking flue gas due to technical reasons& hellip; These technologies are the key links that have not yet been solved and urgently need to be addressed in the energy conservation and emission reduction of the steel industry. Some of these technologies are being supported by special funds for industrial experimental research. In addition, many individual energy-saving and pollution prevention technologies have been well promoted in steel enterprises, but some enterprises have the problem of energy conservation and environmental protection being disconnected, that is, neglecting environmental protection when considering energy conservation and neglecting energy conservation when considering environmental protection& ldquo; Twelfth Five Year Plan; During this period, in the field of energy conservation and emission reduction technology, we should accelerate the integration and optimization of energy conservation and environmental protection technologies. At the same time, he called on the country to introduce special supportive policies for energy-saving and emission reduction technologies such as sintering desulfurization as soon as possible. For common and difficult technologies, various types of support should be provided, such as research and development projects, demonstration technologies, and promotion and application technologies, to promote steel enterprises to break through relevant technologies as soon as possible; The bottleneck;.

How to organically integrate energy conservation and emission reduction management with production management to achieve integrated management and control

Establishing an enterprise energy management center is an important technical means to improve the level of energy management in enterprises. It is reported that there are already 50-60 energy management centers under construction in China's steel enterprises. How to organically integrate the energy management system with the production management system, build an integrated system for energy conservation and emission reduction control in the steel production process, avoid fragmentation, achieve energy optimization and minimization, and truly realize green manufacturing of steel has become a difficult point in energy conservation and emission reduction management for steel enterprises. According to estimates, steel companies can achieve energy savings of 5% to 7% by establishing enterprise energy management centers and implementing modern management.

Regarding this, Director Huang proposed that the energy management center should focus on online tracking and optimized control of the entire plant's media: firstly, to ensure stable supply and dynamic allocation of production; Secondly, fully optimize the energy system and achieve rational allocation of energy; The third is centralized management and automated operations to improve labor productivity. Although the construction of energy management centers in China started relatively late, the development of energy management center technology in steel enterprises has shifted from simple equipment monitoring to comprehensive monitoring of processes and systems, and continues to develop towards integrated control. In the future, it will gradually integrate with environmental monitoring systems to achieve mutual promotion and collaborative management. In the current situation where the economic benefits of steel enterprises are poor and the market is sluggish, energy conservation, cost reduction, and efficiency improvement are particularly important. Enterprises should seize the favorable opportunity of current production line restrictions and renovations, reduce the impact of construction shutdowns on production, and accelerate the construction of energy management centers.

Wang Weixing, an expert from the Chinese Society of Metals, also stated that the work of the Energy Management Center should be synchronized with the production line to achieve a combination of control and management, rather than leaving production and conducting statistical analysis afterwards. This requires scientific, timely, and effective control. Firstly, it is necessary to establish the perspective of systematic energy conservation, break down the professional boundaries between processes, and conduct in-depth research on the scientific, rational, and practical aspects of overall energy conservation in enterprises at a higher level; Secondly, comprehensive research should be conducted at three levels (individual equipment, various production processes, and the overall steel joint enterprise) to improve energy utilization efficiency, with the ultimate goal of achieving the best energy-saving effect as the benchmark.

There is still great potential for the recycling and utilization of secondary energy

Improving the level of secondary energy recovery and utilization has become a key and difficult point for energy conservation and consumption reduction in steel enterprises, as well as an important means to reduce production costs. Industry experts point out that although steel companies have made significant progress in the recycling and utilization of secondary energy, there is still great potential to be explored in the comprehensive utilization of secondary energy such as low-temperature waste heat, which should be regarded as a key factor in the steel industry; Twelfth Five Year Plan; The main direction for improving the comprehensive utilization level of waste heat energy.

The steel industry has made rapid progress in utilizing surplus heat from burning, but there is still room for improving efficiency; The energy-saving potential of sensible heat recovery from blast furnace slag is great, but it has not been effectively utilized yet; There is still room for improvement in the utilization rate of converter waste heat; The waste heat from hot-rolled primary materials can be further improved through integration to enhance utilization efficiency& hellip; We still need to further improve and promote technologies such as high-pressure dry quenching, coal moisture control, sintering waste heat recovery, negative energy steelmaking, converter gas waste heat recovery, continuous casting billet hot charging and delivery, blast furnace oxygen enriched coal injection, efficient power generation of by-product gas, and high value-added utilization of metallurgical slag. We should focus on improving the effectiveness of existing energy-saving technologies, fully tapping into the energy-saving potential of energy-saving technologies, and improving utilization efficiency and popularity. Taking the most representative sintering process as an example, the energy consumption of sintering processes in China is more than 20% higher than advanced indicators abroad, mainly due to the low level of waste heat resource recovery and utilization in sintering processes. The sintering waste heat resources include the sensible heat of waste gas and the sensible heat of products during the sintering process, accounting for 20% and 45% of the total heat income of the sintering process, respectively. According to reports, the fuel consumption of the sintering process is about 44 kilograms of standard coal per ton, and the recovery and utilization of waste heat resources can reach up to 14 kilograms of standard coal per ton, which is roughly equivalent to the electricity consumption per ton of sintered ore. According to the Steel Association's prediction, if mature secondary energy technologies and energy-saving measures are adopted and implemented, the energy-saving potential of the steel industry is expected to reach 16.71 million tons of standard coal in 2015.

Huang believes that improving the efficiency of secondary energy utilization should not be limited to the steel industry or within enterprises, but should promote joint utilization between industries (or enterprises). One is that steel mills with conditions can collaborate with heating companies to provide heating, using low-temperature waste heat resources for the heating of surrounding urban residents, which can reduce the consumption of a large amount of coal. The second is to cooperate with power plants around steel enterprises to develop joint thermal power generation, increase the recovery of by-product gases such as blast furnace gas, coke oven gas, and converter gas, and achieve gas recovery; Zero emissions;. In addition, by-product gas can also increase added value through the production of chemical products, such as hydrogen, methanol, dimethyl ether (CH3OCH3), etc. The third is the resource utilization of metallurgical slag. For example, steel slag can replace limestone as a metallurgical raw material, mainly used for sintering flux, ironmaking blast furnace flux, and steelmaking return slag. Using 1 ton of steel slag is equivalent to saving 700 kilograms to 750 kilograms of limestone, reducing 0.031 tons to 0.033 tons of CO2 emissions, and reducing fuel consumption and production costs. It also has low softening temperature and uniform phase, which can improve the operation of blast furnaces and has the advantages of high efficiency and energy saving. Although this kind of energy conservation and emission reduction is not reflected in the steel industry or within enterprises, it is beneficial for the overall improvement of energy and resource efficiency and CO2 reduction in society.

Shortage and deterioration of raw materials increase the difficulty of energy conservation and environmental protection

Huang Dao pointed out in an interview with China Metallurgical News that the shortage and deterioration of steel production resources and energy are global trends. The deterioration of resources and energy will inevitably lead to an increase in energy consumption and pollutants, making energy conservation and environmental protection more difficult. For example, currently, steel companies are continuously increasing the proportion of low-grade ore used domestically in order to break free from the high price control of imported iron ore, reduce production costs, and increase the use of low-grade ore. However, the relatively low grade and high sulfur content of domestic iron ore have further increased the difficulty of energy conservation and emission reduction in sintering and blast furnace production.

According to Wang Weixing, in 2011, the coke ratio of blast furnaces in key steel enterprises in China increased by 5 kilograms per ton compared to 2010; The coal injection ratio of the blast furnace is 148 kg/ton, a decrease of 1 kg/ton from 2010. This is mainly caused by factors such as the decline in the quality of ironmaking raw materials and fuels, unstable blast furnace production, and deteriorating production environment. For example, in 2011, the grade of sintered ore in key steel enterprises decreased by 0.40%, the drum index decreased by 0.05%, and the alkalinity decreased by 0.37 times; The sulfur content of coke increases by 0.05%. From the development situation in 2011, the speed of technological progress in China's ironmaking enterprises has slowed down. According to statistics, 22 key enterprises have seen a decrease in fuel ratio, 47 enterprises have seen an increase in fuel ratio, and 4 enterprises have remained unchanged. This is mainly caused by the decrease in iron grade in the ore entering the furnace, as the price of iron ore increases and profits decrease, making it more difficult to implement the policy of iron smelting concentrate. Some companies believe that purchasing low-quality and low-priced ores can reduce production costs. Wang Weixing believes that steel companies must calculate a good economic account and have a reasonable, scientific, and economical way to purchase iron ore grade values, even if using low-grade ores, there should be a limit. Although low-grade ore can reduce production costs to a certain extent, it can also lead to increased energy consumption and pollutant emissions in ironmaking, resulting in a comprehensive decline in ironmaking indicators, which does not comply with the national policy of energy conservation and emission reduction.

How to coordinate the prevention and control of new pollution factors with the treatment of major pollutants

With the increasing demands of the public environment, more and more pollution factors are receiving attention& ldquo; Twelfth Five Year Plan; During this period, the country increased the pollution factors for implementing total control, expanding the main pollutants from two to four, namely chemical oxygen demand, ammonia nitrogen, sulfur dioxide, and nitrogen oxides; The new series of standards for pollutant emissions in the steel industry have added emission limits for pollutants such as nitrogen oxides and dioxins. For example, for dioxins, the 12th Five Year Plan for National Environmental Protection proposes to focus on industries such as iron ore sintering, electric arc furnace steelmaking, regenerated non-ferrous metal production, and waste incineration to strengthen the prevention and control of dioxin pollution, establish a sound dioxin pollution prevention and control system, and establish a long-term regulatory mechanism; By 2015, the emission intensity of dioxins in key industries will be reduced by 10%.

Huang pointed out that it is necessary for steel companies to be proactive when implementing pollution prevention and control projects, considering the coordinated treatment and comprehensive prevention of multiple pollutants, and reducing subsequent treatment investment and land occupation. For example, the composition of sintering flue gas is complex, containing various pollutants such as sulfur dioxide, nitrogen oxides, heavy metals, dioxins, etc. However, most enterprises have not considered the comprehensive treatment of multiple pollutants when implementing flue gas desulfurization in sintering machine heads. Therefore, he also emphasized:; The treatment of sintering flue gas is not just a single desulfurization problem, but requires collaborative control of various pollutants, optimization and integration of relevant energy-saving and environmental protection technologies, in order to strive to overcome the technological fortress of energy conservation and emission reduction in sintering production& rdquo;

It is reported that the energy consumption of the sintering process accounts for 10% to 15% of the total energy consumption in steel production. The sulfur dioxide produced by the sintering machine head accounts for more than 70% of the total emissions of steel enterprises. The smoke, dust, and nitrogen oxides emitted by the sintering process account for about 40% of the total emissions of smoke, dust, and nitrogen oxides in steel enterprises. The dioxin produced by the sintering process accounts for more than 90% of the total dioxin emissions in the steel industry. At the same time, sintering waste gas also contains harmful substances such as hydrofluoric acid (HF), hydrochloric acid (HCl), heavy metals, and organic chlorides. At present, the maturity of end of pipe treatment technologies for dioxins, nitrogen oxides, and heavy metal pollutants in steel production flue gas is insufficient, the economic rationality is not good, and there are not many successful experience cases among international peers. Therefore,“ Twelfth Five Year Plan; The environmental protection work in the steel industry during this period should focus on the sintering process as a breakthrough point, and when selecting pollution control plans, it should take into account the coordinated treatment of multiple pollutants or leave necessary interfaces.

How to coordinate the contradiction between the increase in environmental protection facilities, energy consumption, and the improvement of energy-saving requirements

Environmental protection facilities are one of the main electrical facilities for steel enterprises. According to relevant statistics, the electricity consumption of environmental protection facilities accounts for 10% to 20% of the total electricity consumption of enterprises. With the implementation of new emission standards for pollutants in the steel industry, this proportion may further increase. Therefore, the energy-saving issue of environmental protection equipment itself should be highly valued by steel enterprises.

According to Huang's analysis, the main reasons for the high energy consumption of environmental protection equipment are: firstly, the layout of some old steel enterprises is unreasonable or the capacity of individual production equipment is relatively small, resulting in many transfer stations, dust points, and supporting environmental protection facilities; Secondly, some steel enterprises are equipped with outdated environmental protection facilities and have not adopted energy-saving equipment such as blast furnace gas dry dust removal and converter gas dry dust removal; Thirdly, environmental protection facilities that operate intermittently are not equipped with energy-saving measures such as variable frequency speed regulation. In addition, due to increasingly high environmental requirements, steel companies have increased their environmental protection facilities in order to meet standards, which naturally leads to a corresponding increase in energy consumption. The increase in energy consumption and consumables for environmental protection facilities has led to rising costs, and energy conservation has become a mutually balancing factor. Therefore, he suggests that firstly, when selecting environmentally friendly equipment, it is necessary to achieve a reasonable match and effective combination with the production process; Secondly, when selecting pollution control plans, energy-saving technologies and products such as material sealing and conveying, water spraying and dust suppression, high-efficiency electrostatic precipitator, fan frequency conversion speed regulation, and system air volume balance should be selected as much as possible while meeting pollutant emission standards.

How to coordinate the contradiction between the increase in environmental protection facilities, energy consumption, and the improvement of energy-saving requirements

Environmental protection facilities are one of the main electrical facilities for steel enterprises. According to relevant statistics, the electricity consumption of environmental protection facilities accounts for 10% to 20% of the total electricity consumption of enterprises. With the implementation of new emission standards for pollutants in the steel industry, this proportion may further increase. Therefore, the energy-saving issue of environmental protection equipment itself should be highly valued by steel enterprises.

According to Huang's analysis, the main reasons for the high energy consumption of environmental protection equipment are: firstly, the layout of some old steel enterprises is unreasonable or the capacity of individual production equipment is relatively small, resulting in many transfer stations, dust points, and supporting environmental protection facilities; Secondly, some steel enterprises are equipped with outdated environmental protection facilities and have not adopted energy-saving equipment such as blast furnace gas dry dust removal and converter gas dry dust removal; Thirdly, environmental protection facilities that operate intermittently are not equipped with energy-saving measures such as variable frequency speed regulation. In addition, due to increasingly high environmental requirements, steel companies have increased their environmental protection facilities in order to meet standards, which naturally leads to a corresponding increase in energy consumption. The increase in energy consumption and consumables for environmental protection facilities has led to rising costs, and energy conservation has become a mutually balancing factor. Therefore, he suggests that firstly, when selecting environmentally friendly equipment, it is necessary to achieve a reasonable match and effective combination with the production process; Secondly, when selecting pollution control plans, energy-saving technologies and products such as material sealing and conveying, water spraying and dust suppression, high-efficiency electrostatic precipitator, fan frequency conversion speed regulation, and system air volume balance should be selected as much as possible while meeting pollutant emission standards.

How can the government strengthen energy conservation and emission reduction supervision to create a fair and reasonable environment

How can the government strengthen the supervision of energy conservation and emission reduction, create a fair and reasonable development environment, and solve the problems of high environmental compliance costs, low illegal costs, and inconsistent standards and policy implementation scales that have long plagued industries such as steel as early as possible? For example, some companies' environmental protection facilities are only tools for inspection, often stopped or illegally stopped, which is unfair to environmentally compliant companies. According to a person in charge of a steel company, a steel plant with an annual production scale of 1 million tons like theirs consumes about 150 million kilowatt hours of electricity throughout the year, of which about 40 million kilowatt hours are used for more than 40 dust removal facilities in the entire plant. If it is shut down for a year, it can save more than 20 million yuan. In addition, the cost of manual maintenance and dust removal bags alone exceeds 25 million yuan. Industry experts point out that although stopping or illegally stopping environmental protection facilities objectively reduces the energy consumption and production costs of enterprises, it causes serious harm to the environment, completely goes against the original intention of the country to focus on energy conservation and consumption reduction, and also creates unfair market competition.

Director Huang emphasized that the more important issue is that; Eleventh Five Year Plan; During this period, the steel production capacity increased by about 300 million tons, of which only about one-third of the newly added capacity passed the approval of the national construction project environmental impact assessment. The rest of the production capacity was actually built without standardized compliance with the national construction project environmental impact assessment approval procedures. This situation is not conducive to government regulation, making it difficult for steel enterprises to achieve a fair and reasonable energy-saving and emission reduction environment, and seriously affecting the subsequent development of enterprises and the preservation and appreciation of assets. Therefore, he suggests that steel companies with such problems should strive to improve relevant pollution prevention and control facilities, actively apply for environmental impact assessment approval and completion environmental protection acceptance procedures in accordance with the requirements of regulations and standards such as the "Steel Industry Production and Operation Standard Conditions" issued by the Ministry of Industry and Information Technology and the "Environmental Protection Verification Measures for Existing Steel Production Enterprises (Trial)" issued by the Ministry of Environmental Protection; It is suggested that government departments actively accept and accelerate the approval of enterprises that have advanced technology, sophisticated equipment, meet pollutant emission standards, and meet total control requirements, in order to promote the sustainable and healthy development of the steel industry. (Luo Zhonghe, Gao Xiang)