In 2005, the standard power supply coal consumption of the whole plant was 3 19.4g/kWh, and the power consumption rate of the power plant was 3.94%. Compared with 2000, the coal consumption of standard power supply decreased by 3.6g/kWh, and the auxiliary power consumption rate decreased by 0.43%. According to estimates, the power generation of the whole plant in 2005 was 20.58 billion kWh, and only reducing the coal consumption of standard power supply can save nearly 20,000 tons of standard coal every year, saving about 65.438+million yuan. Enterprises attach importance to energy conservation, first of all, management. Establish and improve the energy-saving organization system, set up an energy-saving leading group headed by the deputy general manager of production, and set up four working groups: coal saving, electricity saving, oil saving and water saving. According to the technical supervision requirements of electric power industry, a three-level energy-saving technical supervision network headed by the chief engineer is established, and an energy-saving supervision engineer is set up. At the same time, according to the national and electric power industry policies and regulations on energy conservation, the Energy Conservation Management Measures of Beilun Power Plant, the Implementation Rules for Energy Conservation Supervision of Beilun Power Plant and the Management Measures for Oil Saving and Water Saving of Beilun Power Plant have been formulated to guide the development of energy conservation in the whole plant. According to the national 11th Five-Year Plan and the actual situation of the enterprise, the 11th Five-Year Plan and annual energy-saving plan of Beilun Power Plant are formulated, and the energy-saving plan is broken down by project, time and personnel, and the person in charge is responsible for checking the completion of the plan. The second is to attach importance to technological innovation. In the power industry, it is the first to develop and apply the unit operation optimization management system, which can monitor the unit efficiency online, analyze and adjust the changing trend of the unit operation performance in real time, and greatly improve the unit operation economy. At the same time, through a large number of coal laboratory tests and on-site coal blending combustion tests, rich experience has been accumulated in the coupling of large boiler furnace type and coal quality, and the implementation rules for coal blending combustion management have been formulated, which has played an important role in improving the safety and economy of boiler operation. A lot of experiments have been done to optimize the operation of circulating water system, which greatly saves the power consumption of circulating water pump and reduces the auxiliary power consumption rate. And completed a number of energy-saving technical transformation projects, and achieved remarkable energy-saving and consumption-reducing effects. Beilun Power Plant attaches great importance to environmental protection, and has always put environmental protection on the agenda of the enterprise, established an environmental protection leading group, established an environmental protection supervision network and an environmental protection monitoring station, and relied on scientific and technological research and improvement to continuously reduce the utilization rate of resources, improve the comprehensive utilization rate of "three wastes" and reduce pollutant emissions.
According to reports, the 5×600MW unit of Beilun Power Plant was built in the 1980s. In the engineering design stage, the factory has fully considered the environmental protection requirements, and has high design requirements for the performance parameters of environmental protection equipment. The total investment in environmental protection facilities in the first phase of the power plant is 205.78 million yuan, accounting for 7.28% of the total investment, and the investment in environmental protection facilities in the second phase of the expansion project is 755 million yuan, accounting for 7.4% of the total investment. The first and second phases of the project passed the completion acceptance of environmental protection facilities of the State Environmental Protection Administration on June 2006 1995+00 and March 28, 2006 respectively. The flue gas desulfurization project of five units in the power plant has invested165438+55 million yuan. At present, the desulfurization project is progressing smoothly. After 168 hours of full-load debugging, the desulfurization system of unit 3 was handed over to formal operation on September 15, 2006, and the desulfurization rate of unit 3 reached 95.99%. The desulfurization facilities of Unit 2 will be put into operation by the end of this year. According to the plan, the desulfurization facilities of the other three units will all be put into operation in 2007. After all the desulfurization facilities of five units are put into operation, the sulfur dioxide emission can be reduced by about 654.38+10,000 tons per year. In the aspect of controlling smoke and dust emission, Beilun Power Plant has realized electric dust removal when pulverized coal is put into boilers, and the dust removal efficiency of each unit is over 99.7%, and the smoke and dust emission concentration is far below the national emission standard. In 2006, the monitoring results of Zhejiang Environmental Monitoring Station were 5.72-47.9 mg/day m3, with an average of 65,438+05.95 mg/day m3. After the flue gas desulfurization facilities are put into operation, the flue gas concentration will be further reduced by 50%. Power plants are also actively exploring the utilization market of fly ash, which is favored by cement manufacturing and construction industries for its excellent quality. According to the different requirements of the market for fly ash, millions of yuan were invested to increase the fly ash separation device and improve the utilization rate of fly ash. In 2005, the total utilization of dry fly ash reached more than 6.5438+0 million tons, and fly ash was also comprehensively used for road construction and foundation filling. From June to September, 2006, the utilization of dry ash has reached 730,000 tons. The power plant has its own fresh water source-Qianmu 'ao Reservoir, but enterprises are pressuring themselves and actively exploring ways to reuse reclaimed water. Since the second half of 2009, Beilun Power Plant has contacted Yandong Sewage Treatment Plant in Ningbo Development Zone for many times to conduct feasibility study on adding reclaimed water supply pipes in the plant, and invested nearly 2 million yuan to complete the installation of reclaimed water pipes by the end of 20 10, with the designed annual utilization of reclaimed water of 5 million tons. Since 5,438+10 at the end of June this year, the desulfurization system of Ningbo Beilun Power Plant has been put into operation, using reclaimed water from Yandong Sewage Treatment Plant in Ningbo Development Zone, with a daily consumption of more than 2,000 tons.
It is understood that in recent years, Beilun Power Plant has realized the gradient reuse of fresh water resources by increasing investment in technological transformation, with the focus on applying water sources with different quality to different production links and rationally utilizing various water resources. Only "desulfurization water" accounts for 30% of the second-class industrial wastewater treated by power plants. According to reports, using reclaimed water as process water for desulfurization system can greatly reduce the consumption of fresh water and achieve a win-win situation of social and environmental benefits. Constantly innovate the talent training and incentive system. Among them, David Han, general manager of Beilun Power Plant, is most proud of implementing the maintenance project manager system. "We delegate the maintenance project originally led by the production vice president or chief engineer to the next level cadres, giving them the opportunity to jump out of the original work limitations, comprehensively allocate and coordinate the relations and resources of all parties, and get exercise from them." David Han said. According to reports, since 1998 implemented the maintenance project manager system, a large number of compound management talents have been trained for enterprises, and this practice has been learned and imitated by more and more peers.
In the innovation system, management innovation occupies an important position. The practice of Beilun Power Plant in promoting the leap-forward development of enterprises through management innovation tells us that management innovation solves the problem of promoting the sound and rapid development of enterprises. Beilun Power Plant has well grasped two main links: safe operation management mode and innovation of personnel training incentive mechanism. It is understood that in the process of thermal power generation in Beilun Power Plant, a large amount of flue gas will be generated after coal combustion, and the role of induced draft fan is to provide gravity for these flue gas emissions. In the past, the induced draft fans in power plants were all driven by electricity, and each induced draft fan needed to be equipped with a constant speed motor, which consumed about 70,000 to 80,000 kWh of electricity a day. Using small steam turbine instead of motor as power can save this part of power consumption.
Don't small steam turbines also need to consume energy? For the reporter's question, Hu Weifeng explained with a smile that the key to realize energy saving and consumption reduction in this project is to solve the power supply problem of small steam turbines, and passively reduce the steam grade through the energy consumption of small steam turbines, instead of actively reducing the steam grade by external heating to meet the heating requirements of users.
"The grade of steam mainly refers to the temperature and pressure of steam. Generally, it is required that the temperature should be controlled at about 380 degrees Celsius and the pressure should be controlled at 0.6~ 1.3 MPa to meet the needs of users. However, the extraction parameters of two 1000 MW ultra-supercritical units in the power plant are high, and the steam after cooling and decompression can meet the heating requirements of customers. " Hu Weifeng introduced in detail that through the ingenious transformation of adding small steam turbine to do work, not only the throttling loss caused by passive decompression cooling of steam was avoided, but also the "hot" power was provided for the induced draft fan for free.
At the same time, during the feasibility test of the project, the power plant also gained unexpected gains. In response to regional emission reduction requirements, since 2007, various units in Beilun Power Plant have successively completed flue gas desulfurization projects. "The implementation of desulfurization process has increased the resistance of flue gas emission, and the traction force formed by electric induced draft fan can not meet the requirements. Therefore, a desulfurization booster fan is added after each induced draft fan. According to the data estimation, the power of induced draft fan driven by small steam turbine is very high, and it can meet the requirements of flue gas traction power without desulfurization booster fan. Naturally, it can save the power consumption of the desulfurization booster fan and improve the desulfurization effect of the desulfurization device. " Hu Weifeng said.
Since the second half of this year, Beilun District has once again strengthened regional energy conservation and consumption reduction. Following the shutdown of Ningbo Thermal Power Plant last year, Yao Ming Thermal Power Plant and other small thermal power plants were also shut down, and Beilun Power Plant turned to provide regional central heating for steam sources. The increase of heating effectively ensures the power supply of small steam turbines, and the effect of energy saving and consumption reduction of this project is further manifested.
Hu Weifeng added that Beilun Power Plant, as the first application unit of this technology in China, conducted a detailed test and study on the feasibility of this technology application, and finally decided to implement the transformation on two 1000 MW ultra-supercritical units.
In addition, the reporter learned from the basic table of the project that the replacement of electric induced draft fan by small steam turbine not only has good energy saving effect, but also has obvious emission reduction effect and economic benefit. At present, the project has completed the preliminary work such as technical test, feasibility study and equipment selection, and will start construction in the near future. It is planned to add four small steam turbines to replace the original four induced draft fan engines and four desulfurization booster fans. The reconstruction of the first 1000 MW unit is expected to be completed in the first half of next year, followed by the reconstruction of the second 1000 MW unit. After the completion of the whole project, 302 19 tons of standard coal, 84,797 tons of carbon dioxide, 4 1 ton of sulfur dioxide (after 95% desulfurization) and 7.6 tons of soot can be saved in one year, saving about 47.2 million yuan.