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Industry is the main body of the national economy, and it is also the main source of energy consumption and environmental pollution. It is also a key and difficult point for energy conservation. Promoting industrial energy conservation and emission reduction is of great significance to the completion of national energy conservation goals and the promotion of transformation and development.
"Electrical and mechanical equipment as a key energy-consuming unit in the industrial sector has played a decisive role in the implementation of our national policy of resource conservation." Hou Rui said in an interview with this reporter that actively promote energy-efficient mechanical and electrical equipment, eliminate backward products, improve energy efficiency The application rate of electric motors is of great significance for improving the penetration rate of energy-saving equipment and technology and promoting industrial restructuring.
The relevant person in charge of the Energy Conservation Department of the Ministry of Industry and Information Technology stated that since the “Twelfth Five-Year Planâ€, the Ministry of Industry and Information Technology has been implementing the industrial energy efficiency improvement plan as the main line, further increasing the promotion and application of key energy-saving technologies, equipment and products, strengthening the energy management of key energy-using enterprises, and focusing on the development Energy efficiency benchmarks, energy audits, and improve energy-saving market-oriented mechanisms and institutional safeguards. Cooperate with relevant departments to publish and promote the "2014 Industrial Green Development Special Action Implementation Plan", "Electrical Energy Efficiency Improvement Plan (2013~2015)", "Energy Saving and Environmental Protection Comprehensive Improvement Project of Coal-fired Boiler", "Significant Energy Saving Technology and Equipment" Industrialization Project Implementation Plan. Through the collection of energy-saving technology products, organization review, release of the "energy-saving mechanical and electrical equipment (product) recommended catalog", "energy efficiency star" product catalog, "national key promotion of motor energy-saving advanced technology directory" to promote advanced energy-saving technology products, and Organize on-site promotion meetings to promote advanced energy-saving technologies. Through the improvement of contract energy management, fostering energy-saving service companies and third-party organizations, the promotion of advanced energy-saving technology products will be promoted. Through the strengthening of international exchanges and cooperation, the introduction of foreign advanced energy-saving technology products.
In the next step, the Ministry of Industry and Information Technology will continue to strengthen the energy efficiency and technology promotion of key energy-using industrial equipment such as motors, industrial boilers and transformers. We will continue to use the guiding and restraining functions of standards to speed up the revision of energy efficiency standards. Continue to promote the promotion and application of energy-saving motor equipment and technology. Organize demonstration projects for the industrialization of energy-saving equipment. Further cultivating quality energy service companies.
Cai Weici stated that in recent years, the machinery industry has taken advantage of industry organizations and professional organizations that are familiar with the industry's technology and products, and has actively promoted the energy saving and emission reduction work of the machinery industry. Under the guidance of the Ministry of Industry and Information Technology, it organized and recommended energy-saving mechanical products, compiled a catalogue of eliminated backward products, formulated energy-saving standards, and formulated energy-efficiency-enhancing plans for typical energy-consuming equipment, achieving relatively clear results.
Taking the energy saving and resource utilization center of machinery industry as the representative, cooperated with the Ministry of Industry and Information Technology to carry out energy efficiency improvement activities for industrial equipment, improve the energy efficiency level of terminal energy-using equipment, implement special actions for industrial green development, and promoted the implementation of energy efficiency improvement plans such as industrial boilers and motors. . At present, we are organizing the promotion and application of industrialization of high-efficiency energy-saving products in the “Energy Efficiency Improvement Plan for Electric Machines (2013~2015)†and “Implementation Plan for Comprehensive Improvement of Energy-saving and Environmental Protection of Coal-fired Boilersâ€. At the same time, it is also actively organizing declarations and formulating energy efficiency standards for the machinery industry.
Hou Rui told reporters that this year strives to make significant progress in improving the energy efficiency of industrial boilers, especially industrial boilers.
Characteristic and performance analysis of main parts of generator
Stator:
Stator consists of base, stator core and stator windings.
The base is welded by steel plate, the structure is light and sturdy, and the base is divided into many air inlet and outlet zones in the axial direction;
Stator coil:
It is stacked by strands of copper wire covered by polyester glass fiber, with half-unit type and basket shaped structure (parts of stator coils use transposition structure). The insulation grade of the stator coil is F grade. The stator coil is shaped by continuous wrapping and mould pressing with mica tapes. The coil end is firmly tied up to the support and the bundling ring with unidirectional tapes or dacron-glass ropes thus the turbo-generator unit became highly resistant towards sudden short-circuit conditions.
Stator core:
Stator core is punched and stacked by cold rolled non-oriented, high permeability, low loss high-quality silicon steel sheet, both sides of the silicon steel sheet are coated with a solid insulating film to prevent short-circuit between the stator core pieces to reduce eddy current loss.
Rotor:
The rotor is composed of shaft, coil, center ring, shroud ring and fan ring etc. The rotor coil is made of cold-drawn flat copper wires, and processed by oxygen-free annealing. The rotor coil of generator with 50MW and above is welded together by silver-bearing cold-drawn copper wires and adopts F grade insulation.
The shroud ring at rotor coil end is made of non-magnetic steel. Both ends of the rotor are equipped with centrifugal fan or axial flow fan with paddle fan blade which is forged by high-strength aluminum alloy.
Rotor machining:
The generator shaft is forged from an integral high-quality alloy steel and has an axial groove formed thereon for fitting a rotor coil and an air groove or a crescent groove is made in the large tooth to enhance the cooling of the main body and the coil end. The slots are processed by special machine for generator rotor processing, Tacchi high precision horizontal slotting and milling machine made in Italy, to ensure the high efficiency of generator.
The generator rotor must be subjected to high-speed dynamic balancing experiment and dynamic impedance experiment before delivery to verify the mechanical strength of the rotor and ensure excellent inter-turn insulation of the rotor windings.
(2)Model
Mainly produce the following model Steam Turbine Generator and the specifications are as follows:
Voltage(KV) Frequency(HZ) Power(MW)
2 poles Steam Turbine generator 6.3-3.8 50 3-60
6.6-13.8 60
4 poles steam turbine generator 0.4/0.69 6.3/6.6 10.5/11 50 0.5-30
0.4-11 60
QNP steam turbine generator uses closed-loop air self-circulation ventilation.
The rotors of turbo-generator under 50MW adopt indirect ventilation cooling method;
The rotors of 50MW and above turbo-generator is directly ventilated and cooled; an auxiliary groove is machined under the rotor winding trunking; air vents are machined on the rotor windings; with the action of the fan head and the centrifugal pressure head of the air vents, the rotor windings are directly cooled by air from the auxiliary groove and air vents.
(4)Excitation mode
QNP's steam turbine generator can adopt static silicon controlled type, two-pole AC brushless excitation and three-pole AC brushless excitation, three kinds of excitation mode.
(5)Insulation system
Adopt class F insulation materials and insulation structure, during the running time, assess the system according to class B insulation grade, meanwhile some margin has been kept.
(6)Design and acceptance criteria
Design, manufacture, inspection are carried out according to the relevant national standards, at the same time can meet the International Electrotechnical Commission IEC34-1 latest standards. According to customer`s requirements, QNP`s steam turbine generator can also be designed, manufactured and accepted according to ANSI, NEMA and other international standards.
(7)Technical Performance Analysis
1.Output margin
The series of steam turbine generator of QNP keeps 10% output margin.
2.Loss and efficiency
The steam turbine generator of QNP optimized the design and farthest minimized the additional loss and wind abrasion of generator under no-load and short-circuit condition, improved the efficiency of the generator, in general, QNP steam turbine generator`s efficiency is 0.2% higher than domestic similar models in this industry. It is higher than the national efficiency standard on the same capacity level. For example: QNP 15MW steam turbine generator`s efficiency value can reach 97.65%, and the national standard value is 97%.
3.Running reliability
QNP's steam turbine generator adopts advanced manufacturing technology, especially the rotor`s overspeed test uses high-speed dynamic balancer, rotor`s balance precision has been greatly improved, and the rotor`s vibration value is decreased. So that the steam turbine generator`s running availability factor has been improved, and the unit`s forced outage rate is decreased. At present, the availability factor of the steam turbine generator can reach about 99%, and the forced outage rate fell to 0.04% to 0.4%. Overhaul interval is up to 5 years. And the unit life can reach to 35 to 40 years.
Model meaning
QFWD-3-2A
QF Steam turbine generator
W W means brushless, without W means static silicon controlled
D D means double support, without B means single support
3 Rated power
2 2 means two poles and means the rated rotation speed is 3000 r/min
4 means four poles and means the rated rotation speed is 1500 r/min
A means the design serial number: A.B.C.D
Steam Turbine Generator,Biomass Generating,Biomass Generation,Biomass Power Generation
Shandong Qingneng Power Co., Ltd. , http://www.steamturbine.be