I. Summary of results

Jiexiu City giant source of Carbon Co., Ltd. and Shanxi proactive in accordance with national emission reduction targets and mission planning, a lot of manpower, funds, overcome technical difficulties, the use of advanced energy-saving ring roaster, the flue between the furnace chamber Interconnected to maximize the combustion of volatiles in the raw products, so that the heat of the fuel can be fully utilized, and a reasonable heat preservation layer thickness and furnace wall material are used to achieve better heat transfer effect, which not only meets the production requirements, but also reduces The heat dissipation and heat storage loss of the furnace reduces the heat consumption of the furnace, and the energy saving benefit is remarkable. The implementation of this project can solve the contradiction between the development needs of enterprises and technology upgrades and energy consumption, and better accomplish the energy saving goals of the “Twelfth Five-Year Plan”. It has a pioneering and demonstration effect on improving the energy-saving technical standards of domestic and provincial graphite electrode enterprises.

After completion of the project annual festival standard coal 11464tce, reduce emissions of sulfur dioxide 51.4t / a, soot 47.2t / a; create direct benefits for enterprises 10.224 million yuan. Therefore, the construction of the project achieves the unification of energy conservation goals, economic benefits, social benefits and environmental benefits.

2. The background of the project implementation and the necessity of construction

Jiexiu Juyuan Carbon Co., Ltd. is the governing unit of China Carbon Industry Association and a key enterprise in the production of graphite electrodes. Founded in July 1996, the company integrates state-owned enterprise standards with the flexibility of private enterprises, and rationally sets up institutions and management departments at all levels in accordance with the requirements of the Company Law and the modern enterprise management system. The board of directors of the company is the highest authority, with the chairman, general manager and supervisor. The department has five departments and six branches, including the Enterprise Management Office, the Finance Department, the Supply and Marketing Department, the Quality Inspection Department, and the Production Dispatch Command Center. The division of labor within the department is clear, coordination and coordination, and the incentive and restraint mechanisms are sound. Chairman of the Board of Directors, Qu Guoming, aged 55, graduated from Shanghai Textile Industry University with a major in business management. He has served as a secretary of the Youth League Committee and Minister of Propaganda for many years in large state-owned enterprises. He has extensive leadership and management experience. Our company adheres to the philosophy that science and technology are the primary productive force and respect for talents. It employs experts and high-tech talents from Jilin Carbon, Lanzhou Carbon, Shanxi Carbon and other units to participate in business management. Our company has more than 420 employees, 95% of which are state-owned enterprises, laid-off workers of collective enterprises and rural surplus labor. The average age is 35 years old. They all have junior high school education and above and certain professional skills, including 25 middle and senior technical personnel. There are 7 senior managers and 36 college students. The standard of operation system and the overall quality of employees have laid a good foundation for the rapid development of the company.

Since its establishment, the company has always adhered to the business principle of creating brand with quality, creating profit with credit, paying attention to the improvement of product quality, focusing on accumulation and rolling development. After 12 years of hard work, it has formed from calcination to molding and roasting. Impregnated, graphitized, machined all-round graphite electrode production line, more than 10 kinds of products (Ф100-1170mm) ordinary power, high power, ultra high power graphite electrode), with the ability to produce more than 30,000 tons / year. In 2010, among the more than 80 carbon companies in the country, our company's high-power graphite electrode production ranked fourth in the country; ultra-high power graphite electrode production ranked eighth. At present, our company has complete production facilities and equipment, complete testing means, complete product variety, outstanding operating efficiency, and strong market competitiveness and good growth. The registered capital of the company is 101.8 million yuan. As of December 2010, the total assets of our company amounted to 401.98 million yuan, including fixed assets of 120.26 million yuan and current assets of 219.71 million yuan.

a. Background of project implementation

1. Since the world energy crisis in the 1970s, all countries have attached great importance to the issue of energy conservation, which has led to the emergence of a worldwide energy-saving campaign, and collectively referred to energy conservation and coal, oil , natural gas , and hydropower as the five major energy sources. . Today, energy conservation and energy efficiency have become another goal pursued by all walks of life while seeking to increase labor productivity. In China, although the total energy source ranks third in the world, the per capita energy consumption is less than half of the world average. The energy shortage problem will become an important limiting factor for China's future economic and social sustainable development. Vigorously carrying out energy conservation work is an effective way to eliminate this constraint, and it is also the key to solving the problem of energy shortage in China.

2. As a major energy-intensive industry in China, the carbon products industry's raw materials such as coke , anthracite and coal bitumen are all energy products, and a large amount of electricity, gas and water are consumed in the production of carbon products. For secondary energy products, for example, the production of ordinary power graphite electrodes, the total energy consumption per ton of finished products is as high as 5-6 tons of standard coal (electricity is calculated according to equivalent value), a factory that produces 30,000 tons of graphite electrodes per year, and consumes raw materials annually. Various types of coke and coal tar pitch) are 4.8 to 50,000 tons, and the annual electricity consumption is about 180 million kwh. In the production process of foreign counterparts, the waste products are lower and the yield rate is higher than that of Chinese carbon plants. The raw material consumption per ton of finished graphite electrodes is 10% to 20% lower than that of Chinese counterparts. Graphitization generally uses tandem graphitization technology. The power consumption per ton of graphite electrode is only about 4,500 kWh, and the energy consumption of the roaster is about 20-30% lower than that of the Chinese carbon plant. It can be seen that China's carbon products industry has great potential for energy conservation and consumption reduction.

3. Jiexiu Juyuan Carbon Co., Ltd. is a member of China's carbon industry and a key enterprise in the production of graphite electrodes. It actively responded to the national and Shanxi energy conservation and emission reduction policies, and decided to renovate the three old-fashioned roasters and related equipment in the existing plant area. At the same time, clean energy-generation furnace gas is used as a heat source for roasting to reduce the energy consumption per unit of product.

b. Necessity of project construction

At present, the energy consumption of the domestic carbon industry is generally higher than that of foreign countries. As a main energy-consuming process for the production of graphite electrode products, roasting and impregnation. Many of the enterprise roasters are still old-fashioned roasters. The use of coal as a direct fuel causes a large temperature difference between the upper and lower ends of the furnace. The design of the exhaust duct is unreasonable. The wall and the lid are poorly made, and the heat loss is serious, resulting in low thermal efficiency of the roaster. The product has poor mechanical strength and high scrap rate. At the same time, high-temperature flue gas is wasted through the flue and is not recycled.

Jiexiu Juyuan Carbon Co., Ltd., as a large graphite electrode manufacturer in China, was listed in the list of large-scale carbon products manufacturers in 2010. It has taken the lead in developing a large-scale graphite electrode production method and has applied for national patents. While updating the technology, we attach great importance to energy conservation and emission reduction work, actively and actively investing a large amount of manpower and capital in accordance with the national and Shanxi energy conservation and emission reduction targets and tasks, and overcome the technical difficulties. We adopt advanced energy-saving ring-type roasters to The fire passages are connected to each other to maximize the combustion of the volatiles discharged from the raw materials, so that the heat of the fuel can be fully utilized, and a reasonable heat insulation layer thickness and furnace wall material are used to achieve a better heat transfer effect, which not only satisfies production. The requirement is to reduce the heat dissipation and heat storage loss of the furnace and reduce the heat consumption of the furnace, and the energy saving benefit is remarkable. The implementation of this project can solve the contradiction between the development needs of enterprises and technology upgrades and energy consumption, and better accomplish the energy saving goals of the “Twelfth Five-Year Plan”. The project has a pioneering and demonstration effect on improving the energy-saving technology level of domestic and provincial graphite electrode enterprises, and the implementation of the project is very necessary.

III. Results and practices

(1) Jieshang City Juyuan Carbon Co., Ltd. 30,000 t / a graphite electrode roaster energy-saving technical transformation project, in line with the national and Shanxi Province energy-saving and environmental protection related industrial policies, is to give full play to its technology, resources, markets, funds, transportation, management The advantages of all aspects, the development direction of the project is correct.

(2) The project is located in the original production area, with sufficient power supply, abundant water resources, wide site conditions and good construction conditions.

(3) The overall design of the project reflects the advanced technology, stability, reliability, safety and economics.

According to the existing processing production line of the enterprise, the project utilizes mature and feasible process technology to carry out energy-saving upgrade and transformation for the roaster and supporting equipment, and adopts clean energy-generation furnace gas instead of coal to effectively reduce the energy consumption per unit of product. The demonstration role, while generating huge energy-saving benefits and economic benefits. It has the advantages of convenient operation, low production cost, high technical content, low investment and quick effect. It is a good project to fully implement the circular economy policy.

IV. Results obtained after the implementation of the results

After adopting the energy-saving ring type roaster, upgrading the flue, temperature control system and operating system, promoting the production and consumption process of industrial products and the environment, and reducing the risk of industrial activities to humans and the environment, it is better It reflects the coordination of economic, social and environmental benefits of industrial production and maintains the sustainable development of the national economy, society and the environment. After the completion of the project, the annual standard coal can be 11464tce, reducing the emission of sulfur dioxide by 51.4t/a and soot by 47.2t/a; creating direct income for the enterprise is 10.224 million yuan.

V. Continuous improvement measures

1. Further improve the organization and management system for energy conservation and emission reduction, continuously improve energy conservation and emission reduction organizations, energy conservation and emission reduction management systems, clarify the responsibilities of management of various departments, strictly implement the assessment system for energy conservation and emission reduction, and innovate energy conservation and emission reduction work ideas, Increase efforts in energy conservation and emission reduction measures.

2. Strengthen and improve the equipment and management of energy measurement instruments, improve energy management methods; and vigorously promote the work of voluntary energy conservation agreements.

3. Increase energy conservation and emission reduction technology transformation and energy conservation and emission reduction work management. For other technical transformation projects in the future, advanced energy conservation and emission reduction technologies and energy conservation and emission reduction equipment must be adopted.

4. Strengthen the training of energy-saving and emission-reducing management personnel, learn the advanced energy-saving and emission-reduction experience of the same industry enterprises, optimize the existing systems, find more effective energy-saving and emission-reduction measures, and organize implementation.

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