Paper on environmental protection in iron and steel enterprises

As we all know, iron and steel enterprises are high energy consumption and heavy pollution enterprises. With its continuous development, people's voice for environmental protection is getting higher and higher. The following is the content of the environmental protection paper of iron and steel enterprises that I sorted out for you. Welcome to read the reference!

Analysis and discussion on comprehensive environmental protection management of iron and steel enterprises

Based on the working practice and the background of iron and steel industry, this paper expounds the current environmental protection status of iron and steel enterprises in China, and on this basis, probes into the effective measures to strengthen environmental protection. Finally, the future development direction of China iron and steel enterprises in environmental protection is briefly described. For peer reference only.

Keywords: iron and steel enterprises; Environmental protection; Green development; Management measures; development direction

As we all know, iron and steel enterprises are high energy consumption and heavy pollution enterprises. With its continuous development, people's voice for environmental protection is getting higher and higher. This has prompted many traditions such as steel? Three highs? Green regulations in this industry are also increasing. For example, iron and steel enterprises must meet various regulatory requirements through technological transformation, environmental relocation and introduction of new equipment. But what about sintering desulfurization, dioxin emission reduction and other columns Green? Under the pressure of supervision, the environmental protection cost of enterprises is increasing. How to find a set of effective measures to control the environmental costs of iron and steel enterprises and increase their own profits is particularly important for these iron and steel enterprises.

1. Present situation of environmental protection management in iron and steel enterprises

Who manages the iron and steel enterprises in China? Three wastes? As the content, the goal is to meet the discharge standards, and comprehensive management is the means, that is, the connotation is smoke control, sewage treatment, waste residue treatment and utilization, discharge standards and plant greening. However, in actual production, we know that although a small part of tailings sand and a part of slag sludge have been recycled, the research and development of recycling technology still needs to be deepened.

According to authoritative statistics, in China, the current steel output is 550-600 million tons/year, and the energy consumption is 350-400 million tons of standard coal/year. Only the residual heat of steel slag and blast furnace slag (releasing steam) is equivalent to about 20 million tons/year. The recovery rate of waste heat resources in China's iron and steel enterprises is only 25.8%, and a large number of low-quality waste heat resources have not been effectively utilized. According to the quality statistics of waste heat resources, the recovery rate of high temperature waste heat is 44.4%; The recovery rate of medium temperature waste heat is 30.2%.

Based on the analysis of the author's actual work, there are basically three gaps in the environmental protection of China's iron and steel enterprises at present: taking time as the node, since the 1990s, China's policies have gradually attached importance to the environmental protection of iron and steel enterprises, and by the mid-1990s, China's local areas have basically achieved three changes. The first is the transition from terminal management to whole process control; The second time, from simple centralized control to the combination of centralized and total control; The third one changed from decentralized governance to the combination of decentralization and centralization, and started the pilot work of cleaner production.

According to the author's understanding, in China, environmental protection investment is increasing every year, but compared with developed countries, environmental protection investment accounts for 2.5% of GDP, and there is still a considerable gap between investment and governance, and there is a long way to go.

2. Effective measures for environmental protection management of iron and steel enterprises

Based on the above analysis and discussion, as well as the seriousness of pollution in China's iron and steel enterprises at present, it is forced that iron and steel enterprises should pay close attention to environmental pollution control while grasping production benefits, lower the development mode of low-carbon economy with low energy consumption, low pollution and low emission, and continuously improve their core competitiveness. This paper summarizes some effective practices of iron and steel enterprises, as follows:

2. 1 Iron and steel enterprises should constantly enhance their awareness of environmental protection and realize green production. As an iron and steel enterprise, under the condition of continuously improving its own production capacity, it is necessary for employees to continuously improve their awareness of environmental protection and strengthen the training and popularization of environmental protection-related professional knowledge. Within the enterprise, the environmental assessment and annual environmental report certified by IS0 1400l should be incorporated into the evaluation system of the enterprise, which can also be used as one of the indicators of the annual assessment of employees.

In a word, iron and steel enterprises in China should not only achieve economic benefits, but also achieve social benefits.

2.2 Iron and steel enterprises should improve the long-term mechanism of environmental supervision.

Here, the author suggests that the environmental supervision department should take the iron and steel enterprises as the key supervision objects at ordinary times, urge enterprises to improve various management systems, continuously strengthen equipment management and internal management, maintain the normal operation of pollution prevention facilities, and severely investigate and deal with environmental violations of iron and steel enterprises in dismantling, stopping using, leaving idle or using pollution prevention facilities without authorization. For enterprises that fail to meet the emission standards, the local environmental protection department shall order them to treat them within a time limit, so that the pollutants discharged by iron and steel enterprises can meet the standards stably.

2.3 Iron and steel enterprises should constantly strengthen their own technological transformation.

In addition to improving the software infrastructure, we should continue to strengthen the technical transformation of hardware facilities. Here, the author suggests that iron and steel enterprises promote and popularize a number of mature energy-saving and environmental protection technologies. Here we can illustrate, for example, social-friendly garbage disposal technologies such as garbage incinerators, which can achieve low energy consumption and less material consumption. In addition, we can also invest in developing some effective green technologies to further improve the green manufacturing process of iron and steel production enterprises.

2.4 What do iron and steel enterprises want? Transformation? .

According to authoritative data, there are currently 46 steel enterprises in provincial capitals and large and medium-sized cities across the country. It is this special geographical position that restricts the development of iron and steel enterprises and brings pressure to the urban environment. Today, the relevant departments of the state vigorously advocate energy conservation and environmental protection, and the environmental relocation of iron and steel enterprises is the general trend, which will play a certain reference role in the layout adjustment of China's iron and steel industry.

2.5 Iron and steel enterprises should constantly build a circular economy industrial chain.

This is a bold attempt by iron and steel enterprises and a new way to solve environmental problems. This way can develop the process of energy flow and material circulation between industries and realize the chain circulation of production resources.

Take the low calorific value waste gas released by blast furnace in iron and steel enterprises as an example. After comprehensive utilization in actual operation, differential pressure power generation is sent to coking plant to produce coke, which makes iron and steel enterprises develop in the direction of buying only coal, not electricity and not fuel oil. The high calorific value gas displaced by it is sent to the steel plant for raw material sintering and steel rolling, and the industrial waste heat of the steel plant is recycled to the coal chemical industry and urban life, so as to achieve the purpose of energy saving and emission reduction.

3. Development direction of environmental protection management in iron and steel enterprises

In China, the development of iron and steel enterprises has stood at a new starting point. However, with the rapid economic development in China, environmental protection has attracted more and more public attention. At present, China's iron and steel industry wastewater discharge accounts for about 8% of the total wastewater discharge, sulfur dioxide emissions account for about 7%, soot accounts for about 8%, dust accounts for about 15%, and solid waste accounts for about 13%. Acid rain and sulfur dioxide stipulated by the state? Two control zones? China's steel production accounts for about 75% of the whole country.

Based on this, China, which is in the process of accelerating industrialization and urbanization, is showing great potential for economic development. The author understands that some steel enterprises are constantly becoming the leaders of steel technology and the drivers of green industries. From this point of view, the resource, ecology and low carbonization of iron and steel enterprises are the general trend of future development. ? Green economy? As the only way for future development, the slogan "China Iron and Steel" will push the iron and steel industry into a new track of structural adjustment, continuous innovation and green development. This is the fundamental way to realize the sustainable development of iron and steel enterprises.

refer to

[1] Liu Xiaoyan, zhangyan. On the application of environmental management system in fermented condiment [J]. China condiment, 20 10/0,01.

[2] He Zhen, energy conservation and environmental protection: both publicity and action are needed [J]. Environmental Education, 20 10 0 1.

[3] Wang Chun, Xin Yang. Social Responsibility of Steel Industry: Green Steel, Better World ―― Congratulations on the grand opening of the 4th Baosteel Academic Annual Conference [J], Science and Technology Daily, 20116+00.

[4] Zhu Changyi. Several problems worthy of attention in the development of iron and steel industry [N]. China Metallurgical News, June-19, 2008.

Zhang Jiaju. Present situation and prospect of iron and steel industry in China [D]. Beijing: Shanghai Institute of Metallurgy, China Academy of Sciences.

Discussion on the present situation and prospect of energy saving and environmental protection in China iron and steel industry

This paper mainly analyzes the present situation of energy saving in China's iron and steel industry, and discusses the development direction of energy saving and emission reduction in China's iron and steel industry according to these situations, and finally expounds how to do a good job in energy saving and consumption reduction.

Iron and steel industry; Energy saving; prospect

I. Introduction

With the continuous development of iron and steel industry in China, energy conservation and environmental protection issues have attracted extensive attention. Although China has made some achievements in this respect, there are still some problems that need to be improved. Therefore, it is of great significance to clarify the key points and key links of energy conservation and environmental protection work in China's iron and steel industry, and then take some targeted measures to ensure the development of energy conservation and environmental protection work in China's iron and steel industry.

Second, the significance

The sustained and high-speed development of iron and steel industry is inevitable and long-term. We have done a good job in energy conservation and environmental protection, which has played an important role in promoting the development of the steel industry. The achievements in the past two years have made us full of confidence in achieving various goals, and as the largest steel producer, we also have the responsibility to shoulder the heavy responsibility of building a social and ecological demonstration park with steel production as the core. We will certainly be able to accomplish the goals and tasks of energy conservation and environmental protection in the new period and achieve greater victory.

Three, China iron and steel industry energy saving status

1, output development of China iron and steel industry.

China's crude steel output has been ranked first in the world for 1 5 years since it broke through1100 million t in 1996. Since the new century, China iron and steel industry has entered a period of sustained high-speed development in 1O years, driven by the strong demand brought by the rapid development of industrialization and supported by the upgrading of technical structure in 1990s. The average annual output of crude steel increased by 18.5% in 2009 (20160,000 tons, 2065438). The per capita steel output exceeds 420 kg, which exceeds the per capita steel consumption and supply level of 300 kg in industrialized countries.

2. Progress in energy saving and emission reduction of China iron and steel industry.

China iron and steel industry has made great achievements in energy saving and emission reduction while its scale is expanding rapidly. China iron and steel enterprises adjust the process structure, eliminate backward processes, optimize the energy consumption structure, develop and apply new energy-saving technologies, and take energy-saving measures. Cascade utilization and efficient transformation? Such measures have greatly reduced energy consumption. In 2005, the comprehensive energy consumption ratio per ton of steel decreased by 54. 1% to 0.741tce/t; After 2005, the conversion coefficient of electricity was changed to? Thermal equivalent value? The comparable energy consumption per ton of steel decreased from 0.7 14 to 0.549tce/t in 20 13 years. The energy consumption index of some advanced large-scale iron and steel joint enterprises in China has reached or approached the world advanced level.

At the same time, the production water consumption, wastewater discharge and the reuse rate of production water in China iron and steel enterprises have been significantly improved. From 2002 to 20 13, the fresh water consumption per ton of steel decreased from 15.58t to 3.44t, the wastewater discharge per ton of steel decreased from 10.97t to10.69t, and the water reuse rate increased from 90.56% to 96.9%. The discharge index of major pollutants has been significantly improved, with the industrial dust per ton of steel reduced from 2.858 kg to 0.743 kg, and the discharge of chemical oxygen demand per ton of steel reduced from 0.556 kg to 0.073 kg.

Fourth, the development direction of energy saving and emission reduction in China iron and steel industry

1, technical innovation of steel energy-saving equipment, technology and management.

The production process of iron and steel enterprises is essentially the flow and evolution process of matter, energy and related information. The physical essence of its dynamic operation process is that the material flow (mainly iron flow) is driven by the energy flow (mainly carbon flow) according to the set? Program? , along a specific? Process network? Dynamic and orderly operation is a continuous representation of the morphological evolution of iron material flow and carbon energy flow in the whole process. This requires people to study the efficient transformation and full value development of energy flow as much as they pay attention to iron material flow.

The steel manufacturing process is an open, unbalanced and irreversible dissipation process. The characteristics of iron and steel process are that iron flow is a value-added process and energy flow is a dissipative process. The next energy-saving work is to restrain and reduce the loss and dissipation of energy through the innovation of equipment technology, process technology and management technology, and pursue the goal of improving system energy efficiency? Dynamic, orderly, continuous, compact and efficient-transformation, coupling and matching? Minimize energy flow dissipation and maximize efficiency.

So, through the process of composition? Three passes and one reverse? The device can efficiently realize the analytical optimization of the process function; The energy efficiency of the system should be improved by reducing the process margin and adopting the collaborative optimization of interface technology; It is necessary to improve the comprehensive energy efficiency through the coupling and matching of energy medium and material flow and process, integrated reconstruction and network optimization.

2. Develop an efficient operation mode of distributed power generation in iron and steel enterprises.

There are two main ways to use waste heat and energy, one is thermal energy utilization, and the other is electric energy utilization. For the utilization of heat, it has basically developed very well. However, due to the overall excess heat in the iron and steel process and the limited ways to expand heat utilization, it is necessary to consider the utilization of electricity. If it is converted into electric energy, its utilization can be expanded.

Among the residual heat and energy, gas is of high value and can be used as an ideal fuel for power generation. CCPP can be used to generate electricity by itself or cooperate with the power sector to pursue large-scale power generation benefits. Except gas, 7 1.8% of other waste heat resources have temperatures above 700℃ and high smoke value, so this part of waste heat resources can be used for power generation in quality. The recycling methods of changing waste heat and inefficient recycling of waste energy are low-smoke working fluids such as low-quality steam and hot water, which are not easy to concentrate, efficient and match. Through the construction of distributed power stations, different types of waste heat and energy can be converted into unified high-energy electric energy, which can be recycled, transported and utilized nearby, with high conversion efficiency, high transmission efficiency and high use efficiency.

According to the calculation, according to the mature technical level, iron and steel enterprises with annual output of 1000000t can reach 4 1 1000000kWh. If we further tap the power generation potential of iron and steel enterprises, through the development and application of new technologies, it will become a reality to recover the waste heat of pellets, sinter, coke oven raw gas, metallurgical slag and low-temperature flue gas for power generation, build a steel-electricity cogeneration enterprise, and realize complete self-sufficiency or even external supply of electricity.

3. Development of clean and efficient steel products

For a long time to come, compared with other materials, steel materials still have irreplaceable advantages in performance and recycling rate, and steel products are still the necessary and preferred materials for social development. Does circular economy society need steel enterprises to provide more? Green steel? , is to achieve the function of materials with the least consumption; On the premise of meeting the function of materials, we can reduce the social environmental load by producing clean, long-lived and efficient steel products.

It is necessary to develop high strength and toughness steel to reduce materials and consumption. Such as: Grade III (400MPa) and above hot-rolled ribbed steel bars, high-strength steel plates for various purposes, H-beams, etc. Replacing existing Q235-Q345 steel with high strength steel Q420B can effectively save 6%-8% of steel, and using Q460B can save 10% of steel. Long-life products such as hydrogen sulfide-resistant, carbon dioxide-resistant oil well pipes and pipeline steel plates, atmospheric corrosion-resistant steel plates, section steels and fire-resistant steel.

4. Build industrial clusters and expand the process value of iron and steel enterprises.

As a typical process industry, iron and steel enterprises have the characteristics of process function diversity, target diversity and value diversity. It is necessary to fully tap the advantages of iron and steel technology, develop the functions of energy conversion, waste treatment and recycling in equipment technology, process technology and management technology, enhance the comprehensive value of enterprises, and integrate iron and steel enterprises into the circular economy society.

Based on the theory of industrial ecology, develop the ecological industrial chain of material, energy and water resources, build an iron and steel eco-industrial park with iron and steel enterprises as the core and close ties with other enterprises (such as machinery, building materials, electronics, medicine, chemical industry, etc.), and form a mutually beneficial industrial cluster, so that the materials and energy in the park can be fully utilized.

How to save energy and reduce consumption by verb (abbreviation of verb)?

In order to save energy and reduce consumption, iron and steel enterprises should start from the following aspects:

1, fully understand the great significance of adopting advanced energy-saving and consumption-reducing technologies. Relying on advanced energy-saving technology to promote the saving of raw materials, fuels and materials is an important means for enterprises to reduce costs and improve market competitiveness;

2. Aim at the forefront of world science and technology and introduce and apply the latest technology. It is necessary to comprehensively consider the problem of process matching, so that new projects not only have a high starting point in technology, but also have a high starting point in energy saving and consumption reduction, eliminate backward processes and equipment as soon as possible, and change from energy saving and consumption reduction of single equipment to energy saving and consumption reduction of system optimization, so as to realize the optimization and rational allocation of upper and lower processes;

3, the introduction of technology and the specific situation of enterprises. According to the production and equipment capacity, when applying advanced energy-saving and consumption-reducing technologies, we should selectively adopt advanced equipment and technology to avoid idle new equipment or waste of resources caused by blind investment.

4, increase investment in science and technology, and constantly study new energy-saving and consumption-reducing topics. Combine technology introduction and secondary innovation organically to form an independent energy-saving and consumption-reducing technology system with the characteristics of this enterprise.

Advising intransitive verbs

In order to achieve sustainable development in the fiercer market competition, we must put energy conservation and consumption reduction in the first place, formulate practical energy-saving measures according to our actual situation, continuously introduce and develop new technologies and new processes, strengthen independent research and development capabilities, eliminate backward production technologies and equipment, promote comprehensive recycling of resources, and promote clean production. Accelerate enterprise restructuring, implement national policies, realize the transformation of economic growth from extensive production mode to intensive production mode, make China iron and steel industry truly stronger, and comprehensively enhance the overall production capacity and market competitiveness of China iron and steel industry.

Seven. Concluding remarks

To sum up, through the research on the present situation and prospect of energy-saving and environmental protection work in China's iron and steel industry, the direction of energy-saving and environmental protection work in iron and steel industry is defined. In the follow-up work of energy conservation and environmental protection in iron and steel industry, the management level of energy conservation and environmental protection work must be improved to avoid waste of resources.

refer to

Zhang Chunxia. Main energy-saving measures in steel production and analysis of CO2 emission reduction potential [J]. Metallurgical Energy, 20 10 (1): 3-7.

[2] Li Zhen. Present situation and development trend of energy-saving and consumption-reducing technology in China iron and steel industry [J]. Angang science and technology, 2011(5):1-5.

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