According to the introduction, Beilun Power Plant has five 600MW subcritical units, annual consumption of raw coal amounted to more than 7 million tons, energy saving and consumption reduction work not only affects the plant's economic efficiency, and to reduce pollutant emissions and protect the environment is of great significance. The plant focuses on energy-saving work from the management and technology to take measures in two major aspects, and annually invests up to 5 million yuan or more in science and technology related to energy saving, technological innovation and overhaul costs, and has achieved significant energy-saving and consumption reduction results.
In 2005, the standard coal consumption of the whole plant was 319.4g/kWh, and the electricity consumption rate of the plant was 3.94%. Compared with 2000, the standard coal consumption of power supply decreased by 3.6g/kWh, and the rate of power consumption of the plant decreased by 0.43%. It is estimated that in 2005, the power generation capacity of the whole plant was 20.58 billion kWh, and only the decline in standard coal consumption can save nearly 20,000 tons of standard coal each year, saving costs of about 10 million yuan. The enterprise in the grasp of energy saving, first, pay attention to management. Establishment of a sound energy-saving organization system, the establishment of a production deputy general manager of the energy-saving leading group, under the coal, electricity, oil and water saving four working groups. According to the technical supervision requirements of the electric power industry, a three-tier energy-saving technical supervision network headed by the chief engineer has been established, and an energy-saving supervision engineer has been set up. At the same time, according to the national and power industry energy saving policies and regulations, we have formulated "Beilun Power Plant Energy Saving Management Measures", "Beilun Power Plant Energy Saving Supervision Implementation Rules", "Beilun Power Plant Oil and Water Saving Management Measures", etc., to guide the whole company to save coal, electricity, oil and water. Measures", "Beilun Power Plant Energy Saving Supervision Implementation Rules", "Beilun Power Plant Oil and Water Saving Management Measures", etc., to guide the development of energy-saving work throughout the plant. According to the energy-saving goals proposed in the national "Eleventh Five-Year Plan", Beilun Power Plant has formulated the "Eleventh Five-Year Plan" energy-saving plan and annual energy-saving plan by combining with the actual situation of the enterprise, and the energy-saving plan has been decomposed according to the project, time and personnel, and the staff is responsible for checking the fulfillment of the plan. The energy-saving plan is broken down and implemented by project, time and personnel, and a special person is responsible for checking the completion of the plan. Secondly, we emphasize technological innovation. The company is the first in the power industry to develop and apply the unit operation optimization management system, which carries out on-line monitoring of the unit efficiency and enables real-time analysis and adjustment of the change trend of the unit's operation performance, thus greatly improving the economy of the unit's operation. At the same time, through a large number of coal laboratory tests and on-site coal blending tests, the company has gained rich experience in the coupling between furnace type and coal properties of large boilers, and formulated implementation rules for coal blending management, which plays an important role in improving the safety and economy of boiler operation. A lot of experiments and researches have been done in optimizing the operation of circulating water system, which greatly saves the power consumption of circulating water pumps and reduces the rate of plant electricity consumption. And completed a number of energy-saving technical reform projects, achieved significant energy saving and consumption reduction effect. Beilun Power Plant attaches great importance to environmental protection, always put environmental protection work into the enterprise agenda, set up a leading group of environmental protection, the establishment of environmental protection supervision network and environmental protection monitoring station, relying on scientific and technological research and scientific and technological improvements and other measures to continuously reduce the use of resources, improve the "three wastes" comprehensive recycling, reduce the emission of pollutants.
It is reported that the Beilun Power Plant 5 × 600MW unit was built in the 80's, the plant in the engineering design stage, give full consideration to the environmental requirements, the environmental protection equipment, the performance parameters of the design requirements are also higher. Power Plant Phase I project environmental protection facilities investment totaled 205.78 million yuan, accounting for 7.28% of the total investment, the second phase of the expansion project environmental protection facilities investment of 755 million yuan, accounting for 7.4% of the total project investment. The first and second phase of the project passed the environmental protection facilities completion inspection and acceptance by the State Environmental Protection Administration in October 1995 and March 28, 2001 respectively. The flue gas desulphurization project of 5 units of the power plant has invested RMB 1.155 billion yuan, at present, the desulphurization project is progressing smoothly. unit 3 desulphurization system has been handed over to the official operation on September 15, 2006 after 168 hours of full-load debugging and operation, and the desulphurization rate of unit 3 has reached 95.99%. At the end of this year, the desulphurization facilities of Unit 2 will be put into operation, and according to the plan, the desulphurization facilities of the other three units will be put into operation in 2007. after all the desulphurization facilities of the five units are put into operation, the annual sulphur dioxide emission can be reduced by about 100,000 tons. In terms of controlling the emission of soot, Beilun Power Plant has realized the operation of electric dedusting when the boiler is put into operation with pulverized coal, and the efficiency of dedusting of each unit has reached more than 99.7%, and the concentration of soot emission is far lower than that of the national emission standard.In 2006, the results of the monitoring by the Environmental Monitoring Station of Zhejiang Province were 5.72-47.9mg/N.d.m3, and the average value was 15.95mg/N.d.m3. The average value is 15.95mg/N.d.m3. After the flue gas desulphurization facilities are put into operation, the concentration of soot will be further reduced by 50%. The power plant also actively explores the fly ash utilization market, and is favored by the cement manufacturing industry and the construction industry by virtue of its excellent fly ash quality. According to the different needs of the market for fly ash, we invested several million to increase the fly ash sorting device, which improved the utilization of fly ash. 2005, the total dry ash utilization amounted to more than 1 million tons, and the ash slag was also comprehensively utilized in road construction and foundation filling. 2006, the dry ash utilization from January to September has reached 730,000 tons. The power plant has its own fresh water source - Qianmuzhao Reservoir, but the enterprise is self-pressurized, and actively explore the road of water reuse. From the second half of 2009, Beilun Power Plant has repeatedly contacted Ningbo Development Zone Yandong Sewage Treatment Plant to conduct a feasibility study on installing additional reclaimed water supply pipe in the plant, and invested nearly 2 million yuan to complete the installation of reclaimed water pipeline by the end of 2010, which is designed to utilize 5 million tons of reclaimed water annually. From late January this year, Ningbo Beilun and put into the power plant desulfurization system, this system uses the Ningbo Development Zone, Rock East sewage treatment plant water, the daily use of water up to more than 2,000 tons.
It is understood that in recent years, Beilun Power Plant by increasing investment in technological innovation to achieve gradient reuse of freshwater resources, focusing on different water quality of the water applied to different production processes, so as to rationalize the use of various water resources. Single "desulfurization water" one, the power plant after treatment of industrial wastewater accounted for 30% of the second category. It is reported that using water as process water in the desulfurization system can significantly reduce the consumption of fresh water and achieve a win-win situation in terms of social and environmental benefits. Continuously innovate the training and incentive system for talents. Among them, the general manager of Beilun Power Plant, David Han, is most proud of the implementation of maintenance project manager system. "We put the maintenance project originally led by the vice president of production or chief engineer decentralized by the next level of cadres in charge, so that they have the opportunity to jump out of the original work limitations, all-round deployment and coordination of relationships and resources, from which to get exercise." Han David said. According to reports, maintenance project manager system from 1998 to date, has trained a large number of complex management personnel for the enterprise, this practice is also more and more counterparts to learn and follow suit.
In the innovation system, management innovation occupies an important position. Beilun Power Plant to management innovation to promote the leapfrog development of the practice tells us that management innovation to solve the problem of promoting the method of good and fast development of enterprises. Beilun Power Plant has well grasped the safety operation and management mode and talent training incentive mechanism innovation of the two main links. It is understood that the Beilun Power Plant in the thermal power generation process, coal combustion will produce a large amount of smoke, and the role of the induced draft fan is to provide gravity for these smoke emissions. Previously, the power plant's induced draft fan are driven by electricity, each induced draft fan needs to be equipped with a fixed-speed motor, a day need to consume about 70,000 to 80,000 degrees of electricity. By replacing the electric motor with a small steam turbine as the power source, this part of the electricity consumption can be saved.
Doesn't a small turbine require the same amount of energy to operate? For the reporter's question, Hu Weifeng smiled and explained that the project to achieve the key to energy saving and consumption reduction lies in solving the problem of power supply of small steam turbine, will be the original in order to realize the external heat supply and thus passively reduce the grade of steam, changed through the small steam turbine energy consumption to actively reduce the grade of steam, in order to meet the user's heat supply requirements.
"The grade of steam mainly refers to the temperature and pressure of the steam, to meet the user's heat supply of steam is generally required to control the temperature at about 380 degrees Celsius, the pressure is 0.6 ~ 1.3 megapascals between. And the power plant two 1000 MW ultra-supercritical unit pumping parameters are higher, the steam after the reduction of temperature and pressure in order to meet the customer's heating requirements." Hu Weifeng said in detail, through the increase of small turbine work to carry out clever transformation, not only to avoid the steam passive decompression and cooling caused by the throttling loss, but also free of charge for the induced draft fan to provide "hot" power.
At the same time, the power plant also got a windfall when the feasibility of the project was tested. In response to regional emission reduction requirements, Beilun power plant units have completed flue gas desulfurization projects since 2007. "The implementation of the desulfurization process increases the flue gas emission resistance, the original traction formed solely by the electric induced draft fan can not meet the requirements, for this reason, in the back of each induced draft fan and added a desulfurization booster fan. According to the data estimation, the power of induced draft fan driven by small turbine is so strong that it can meet the requirement of flue gas traction power without FGD booster fan. Naturally, it can save the power consumption of the desulfurization booster fan, but also enhance the desulfurization effect of the desulfurization unit." Hu Weifeng said.
Since the second half of this year, Beilun District again enhanced regional energy saving and consumption reduction. Following last year's closure of the Ningbo Thermal Power Plant, and has closed down the Mingyao Thermal Power as well as a number of other small thermal power plants, but by the Beilun power plant for the steam source for regional centralized heat supply. The increase in heat supply effectively guarantees the power source of the small turbine, and the energy-saving and consumption reduction effect of the project can be further realized.
Hu added that, as the first domestic application of the technology, Beilun Power Plant conducted detailed tests and studies on the feasibility of applying the technology, and finally decided to implement the retrofit on two 1,000-megawatt ultra-supercritical units.
Additionally, the reporter learned from the basic information sheet of the project that the project of replacing the motor-driven induced draft fan with a small steam turbine not only has better energy-saving effect, but also has obvious emission reduction effect and economic benefits. The project has completed the project technical testing, feasibility study and equipment selection and other preliminary work, will be substantial in the near future to start construction, the plan is to add four new small turbines to replace the original four induced draft fan motors and four desulfurization booster fan. The transformation of the first 1,000 MW unit is expected to be completed in the first half of next year, followed by the transformation of the second 1,000 MW unit. After the completion of the whole project, it can save 30,219 tons of standard coal, reduce carbon dioxide by about 84,797 tons, sulfur dioxide by about 41 tons (after 95% desulfurization), soot by about 7.6 tons a year, and save about 47.2 million yuan.