The reporter recently learned that the “Science and Technology Innovation, Clean and Efficient†steam turbine energy-saving technology application exchange meeting learned that according to the “Development and Reform Commission, the Ministry of Environmental Protection and the Energy Bureau, the three ministries jointly issued the “Coal Energy Saving and Emission Reduction Upgrade and Transformation Action Planâ€. With the relevant requirements, Harbin Electric Group Harbin Steam Turbine Works Co., Ltd. (hereinafter referred to as Haqi Company) continued to intensify the transformation of in-service units and achieved significant results. The key indicators of a number of key projects have reached the national leading level and become the industry. Benchmarking. Representatives from more than 150 power plants and electric power institutes across the country and industry experts attended the meeting, and conducted in-depth exchanges on the successful experience of upgrading and upgrading the No. 4 unit of the Qitaihe project and the energy-saving and emission reduction upgrade technology of coal-fired units.
"changed" performance
At the exchange meeting, Lu Zhiqiang, executive deputy general manager of Haqi Company, told the China Industry News reporter that in the past two years, Harbin Automobile Company has actively implemented the national requirements for energy conservation and emission reduction, and vigorously carried out optimization and upgrading of the entire series of products. The optimization and upgrading of the 1 million kilowatt class, 600,000 kilowatt class high parameter model and 350,000 kilowatt supercritical model were completed, and the optimization results were first applied to the modified unit. The transformation of No. 4 steam turbine of Datang Qitaihe Power Plant is one of them. The excellent indicators of the unit are another landmark project after the successful transformation of two 800,000 kW Russian units of Guohua Yuzhong Power Plant, which fully demonstrates the strong independent innovation capability and core competitiveness of Harbin Automobile Company.
In this regard, Lu Hongda, the chief engineer of the former Ministry of Power's complete equipment bureau and a well-known expert in the national power industry, accepted the above opinion when he was interviewed by China Industrial News. He pointed out that two years ago, Harbin Company chose a correct technical route, which made Harbin's unit transformation technology a leader in the country.
According to the relevant national industrial policies, especially the relevant requirements for energy conservation and emission reduction, Harbin Automobile Co., Ltd. has continuously strengthened the transformation of scientific research and development and energy conservation and emission reduction projects. After testing by many domestic authorities such as Xi'an Thermal Engineering Institute and Datang Northeast Electric Power Test Institute, the reformed units have led domestically and have become a model for national energy conservation and emission reduction upgrade projects.
It is understood that the multi-stage small raft drop type, high and medium pressure integral inner cylinder, low pressure cast iron inner cylinder, pre-twisted assembled partition, pre-twisted moving blade, small clearance steam seal, low pressure worm developed by independent research and development. New technologies such as shell inlet steam structure have been at the domestic leading level and have been successfully applied to the transformation of Unit 4 of the Datang Qitaihe Project. The application of these technologies effectively improves the efficiency of the unit, improves the environment of the Qitaihe area, and contributes to the national energy conservation and emission reduction. The operational data of the unit after the transformation fully confirms the superiority of the energy saving and emission reduction technology of the Haqi Company.
The No. 4 unit of Datang Qitaihe Project is a subcritical 600,000 kW unit. The initial heat consumption of the rated power is 7777.56 kJ/kWh, which is far superior to the operating heat consumption of 8187 kJ/kWh before the unit transformation. After the completion of the transformation, the heat consumption of the unit decreased by 409.44 kJ/kWh, and the coal consumption rate of the converted power supply decreased by about 13.99 g/kWh. The transformation effect was obvious.
The unit is a heating unit. The heating pressure before the transformation is 0.8 MPa. At this stage, the heating pressure of the unit is reduced to 0.55 MPa. Under the rated conditions, under the premise of ensuring the extraction capacity of 300 tons/hour. It can increase the power generation capacity by 20,000 kW. Through this transformation, Harbin Automobile Co., Ltd. will boost the revenue of Qitaihe Power Plant by more than 40 million yuan per year.
The comprehensive performance index of Unit 4 of Qitaihe Project is at the highest level of the same type and same capacity unit in China. It is the most obvious unit in the same type of units in China, and has played a positive demonstration and leading to the development of national electric power equipment. effect.
According to statistics, the pollutants produced by burning one ton of coal are about 41.37 kilograms, and the converted units will reduce the emissions of nearly 2,900 tons of pollutants every year. The data shows that an acre of wood can absorb 1.5 tons of pollutants per year. Based on this calculation, the pollutant emissions of Unit 4 of the Qitaihe Project are equivalent to 1933 mu of trees per year, which has made outstanding contributions to national energy conservation and environmental protection.
Put on "China Core"
Before completing the transformation of Unit 4 of Qitaihe Project, Haqi Company actively participated in the development and application of coal-fired energy-saving and emission reduction technologies. In 2015, two supercritical steam turbine units for the transformation of Shenhua Guohua Yuzhong Power Plant were expanded from the original Russian system of 800,000 kilowatts to 880,000 kilowatts, which also created the largest single unit capacity, the longest shaft system and the shortest cycle. Unit transformation record.
The two units of Jizhong Power Plant were affected by the design and manufacturing level at that time. The system was huge and the equipment was backward. Although the model has been optimized many times, it still has frequent failures. Since the project was put into production, the main equipment such as generators, main transformers and steam turbines have frequently failed, and the economic indicators are backward. The cycle efficiency of the unit is low and the heat consumption value is too high. It does not meet the requirements of national energy conservation and emission reduction, and the unit transformation is imminent.
Harbin Automobile Company actively responded to the national green environmental protection strategy and undertook the transformation task of the two 800,000 kW supercritical unit steam turbines of Jizhong Power Plant. During the technical optimization process of the Yuzhong renovation project, a number of innovations were applied around improving the flow efficiency. Advanced technology such as medium-pressure rotor cooling, hydraulic bolts and pre-twisted blades are used to provide a powerful guarantee for improving the performance and indicators of the unit. At the same time, advanced technology has resulted in a steady increase in capacity, safe operation and significant improvement of technical indicators.
The reconstruction project in Suizhong not only solved the problems of blade fracture at the end of the original steam turbine, bending of the medium-pressure rotor, large vibration of the shafting, jamming of the sliding pin system, and falling off of the steam seal at the top of the steam turbine, and the turbine efficiency reached 46.5%. It shows that the heat consumption is significantly reduced, the unit economy is improved, and the national energy conservation and emission reduction requirements are met.
In the process of unit transformation in the middle of the unit, Haqi Company pays great attention to the product quality and delivery cycle. Each component of the unit is equipped with a logo to ensure the full monitoring of the production process of each component. A special "Quality Control Plan" was formulated for the Yuzhong project. The members of the project promotion team went to the production site to conduct daily inspection services to solve the problems encountered in the production process in a timely manner, and ensure the production progress while ensuring the product quality.
Harbin Automobile Company takes customer satisfaction as the center and pursues the success of users. During the renovation of the unit in Suizhong, the professional deputy chief engineer sent the on-site guidance work several times to provide technical support for the smooth implementation of the unit transformation. During the installation and commissioning phase of the unit, more than 20 professionals were selected to provide on-site service. The service personnel responded quickly and solved various problems encountered at the scene in time to ensure the quality and quantity of the unit transformation task was completed.
Through the transformation of the Suizhong unit by Harbin Automobile Co., the operation defects of the unit were eliminated, the safety and reliability of the unit were improved, the operation and maintenance cost was reduced, and the service life of the unit was prolonged. After the transformation, the vibration index of the unit is good. The rated power of the unit is changed from 800,000 kilowatts to 880,000 kilowatts. The maximum output of the unit is 900,000 kilowatts. The heat consumption rate of the steam turbine is reduced to 7700.93 kJ/kWh. Coal consumption is reduced by 25.56 g / kWh, saving 127,500 tons of standard coal per year. According to calculations, the two retrofit units can save about 128.5 million yuan for the Suizhong Power Plant.
By replacing the "Chinese core" with the old Russian-made units that have been in service for 14 years, Harbin has achieved the goals of energy saving, emission reduction, optimization and upgrading, and capacity expansion, and created a clean and efficient use of coal through the technical transformation of large-scale units in active service. The Wanted Avenue has written a new chapter in the history of China's power industry.
Continue a new chapter
At the same time that Harbin Automobile Co., Ltd. has made major breakthroughs in energy-saving renovation projects, in order to effectively grasp the medium- and long-term strategic planning of energy, efforts will be made to improve energy efficiency, energy conservation and emission reduction, vigorously promote the energy supply revolution, and pay more attention to the research and development of environmentally friendly products. In the past five years, the accumulated investment of nearly 1 billion yuan, more than 300 core R & D personnel participated in the research and development of new products, and accumulated nearly 600 patents.
Through the research and development of supercritical and ultra-supercritical large-scale thermal power steam turbines, Haqi has cultivated a large number of experienced and high-tech research and design experts, and has become a power generation equipment manufacturing base with strong strength. The overall R&D, design and manufacturing level of supercritical power generation equipment has gradually narrowed to the gap with the world's advanced level. At present, it has fully capable of independently researching advanced ultra-supercritical technology. In order to cope with the technology upgrade of the power manufacturing industry and the national energy conservation and emission reduction plan, Harbin has developed a sustainable development plan for technology and products, representing the world's highest level of technology and a new generation of energy consumption reduction of 5% to 10%. The development of high-efficiency ultra-supercritical steam turbines is in full swing.
In an interview, China Industry News reporter learned that Harbin Automobile Company has developed an efficient and clean coal-fired generating unit as an important development strategy in accordance with the relevant requirements of the National Coal Energy Saving and Emission Reduction and Renovation Action Plan.
At the same time, in view of the current situation that most domestic in-service units have low cycle efficiency, high heat consumption value, and do not meet the requirements of new technologies such as national energy conservation and emission reduction, in order to meet the needs of users with higher power supply efficiency, the full range of main forces The model has been optimized and upgraded, including 350,000 kilowatts of supercritical, 660,000 kilowatts of supercritical, million grade super-supercritical, and millions of grades of secondary reheating and super-supercritical. The new technology is already in use. The Zhonghe Qitaihe project has been fully verified. The optimized unit efficiency will be effectively improved. It is expected that the heat consumption value will reach the industry leading level, and the comprehensive performance of the unit will reach the domestic advanced level.
In the future, Harbin Automobile Co., Ltd. will always adhere to the core of scientific and technological innovation, actively accelerate the development of the future market, focus on the research and development of advanced models with higher parameters and larger capacity, and unswervingly follow the path of clean energy development. Through continuous improvement and independent research and development of products, we are committed to creating clean and efficient high-quality units for users, and constantly establish a new model of domestic coal-fired energy-saving and emission reduction projects.
At the same time, it will further enhance the R&D and manufacturing capabilities of high-precision steam turbine products, continue to lead the development of power equipment manufacturing industry, make the domestic power equipment design and manufacturing level comparable to the world's advanced enterprises, and inject inexhaustible power to enhance the "Made in China" level.
Concerned about surprises
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