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    Testing & Research
  • Testing & Research
    Effects of Aerodynamic Characteristics on the Swirl Burner Performance
    ZHANG Yu-bin, LI Ming, DU Shu-li, MIAO Yu-wang, SUN Shu-weng,
    CUI Xing-yuan, WANG Xin-guang
    2012, 26(3): 145-148.
    Abstract ( )   Knowledge map   Save
    Cold aerodynamic fields of LNASB and HT-NR3 burner have been measured, so as to analyze how following parameters influence the burner performance, such as the shape, size and position of the circumfluence area and the jet expansion angle, etc. It is pointed out that establishing an annular circumfluence area between primary and secondary air flow would be better for delaying the secondary air supply, prohibiting NOx formation, preventing burner nozzles and nearby water wall from being burned out and slagging, reducing ignition temperature, promoting ignition of pulverized coal, and therefore securing a stable combustion of the burner.
  • Testing & Research
    Numerical Study on Separator Performance of GS4366 Coal Mills
    YU Wei-xin, KUANG Jiang-hong, CAO Han-ding, XIONG Xian-wei
    2012, 26(3): 149-152.
    Abstract ( )   Knowledge map   Save
    Regarding the separator performance of a GS4366 coal ball mill for the 600 MW unit boiler under-construction in Sichuan CPI Fuxi Power Co., Ltd., a numerical simulation of gas-solid two-phase flow has been carried out to obtain gas-powder flow field in the separator at baffle openings of 64° and 90°, and determine separation effect for different particle sizes at a baffle opening in 38°-90°. Results show that the separation efficiency is relatively high when the baffle opening is in 38°-64°, therefore it is proposed to add adjustment points within this range to make the fineness and uniformity of coal powder in coal pulverizing system meet relevant requirements.
  • Testing & Research
    Analysis on Retrofit Design of IGCC Gas Turbines
    CUI Yao-xin, XU Qiang, ZHANG Dong-fang
    2012, 26(3): 153-156.
    Abstract ( )   Knowledge map   Save
    An IGCC (integrated gasification combined cycle) system is very complicated, which integrates a variety of equipment and technology, such as the gasifier, air separation unit, gas turbine, heat recovery steam generator and steam turbine, etc., covering the chemical and power generation industry. By analyzing the characteristic difference between syngas and natural gas, and the influence of syngas on gas turbine performance, a discussion has been carried out on the retrofit design of gas turbine for the purpose of changing the fuel from natural gas into syngas. The experience may serve as a reference for design of IGCC gas turbines.
    • Conputer & Control
  • Conputer & Control
    Integrated Solution of Digital Power Stations
    ZHANG Wei-jie, ZHANG Jing-xin, ZHANG Xu-yan, ZHU Ning
    2012, 26(3): 157-160.
    Abstract ( )   Knowledge map   Save
    Digital power plant has been practiced in Sudan petroleum coke power station project. The plant-wide control, the numerical structure design, and the analysis and optimization process of information management system have been introduced. Various systems have been combined to guide and improve the operation, management and maintenance in the power station at an integrated mode.
  • Conputer & Control
    Analysis on Protection Signals of a 3500 Series Steam-turbineMonitoring Instrument
    ZOU Bao-chan, HE Yue-ke, WANG Xiao, LUO Hui
    2012, 26(3): 161-163.
    Abstract ( )   Knowledge map   Save
    Combined with the practice in Beijing Taiyanggong gas-fired thermal power Co., Ltd., problems in logic of main protection signals and software configuration of the Bently 3500 series steam-turbine monitoring instrument have been analyzed, for which corresponding treatment schemes are put forward. Moreover, the status of unqualified protective signal has been summarized and analyzed, and the analysis results have filled up the blank of relative standards and rules in electric power industry, which may therefore serve as a reference for treatment of unqualified protective signals of turbines.
  • Conputer & Control
    Application of EDPF-NT PLUS System in a 660 MW Ultra Super-critical Unit
    TANG Wei, MA Dong-liang
    2012, 26(3): 164-168.
    Abstract ( )   Knowledge map   Save
    Regarding the EDPF-NT PLUS distributed control system used in the 660 MW ultra super-critical unit in a power station, an introduction is being presented to the constitution of its DCS communication network, the configuration of the network switch, the features and distribution of its DPU controller, and the structure and property of the EDPF-NT system. Debugging steps of the system and treatments to solve relevant problems have also been put forward.
  • Conputer & Control
    Realization of On-demand Sootblowing for Boiler Furnaces
    LIU Yuan-wei, DI Wan-feng, LIAO Kai-tai, LI Yan-chao, LI Chun-yu
    2012, 26(3): 169-171.
    Abstract ( )   Knowledge map   Save
    In view of the relationship between the operational efficiency of a boiler and the sootblowing effectiveness of its heat surfaces, the improvement of fouling monitoring against the heat surface has been introduced through installing temperature measuring devices on inner and outer surface of boiler water wall in Matsuura Thermal Power Plant so as to realize the automatic control of on-demand sootblowing in the boiler furnace. This may serve as a reference for development of relevant domestic technologies.
  • Conputer & Control
    Development and Application of Equipment Database in Power Plants
    WANG De-jun, SHI Zhao-xi, MENG Wei, HE Ning, WANG Xi-zhao
    2012, 26(3): 172-175.
    Abstract ( )   Knowledge map   Save
    An introduction is being presented to the purpose, business framework and coverage of equipment database in Guohua Electric Power Research Institute Co., Ltd., including specific contents and preparation criteria for database of each kind of equipment, together with a description about how to use the database platform to perform equipment management and fault diagnosis with actual examples.
    • Operation & Retrofit
  • Operation & Retrofit
    Discussion on Vibration Problems of a 600 MW Super-criticalTurbine-generator Unit
    ZHU Zhi-jian
    2012, 26(3): 176-178.
    Abstract ( )   Knowledge map   Save
    An analysis on vibration problems occurring in shafting and other parts of the N600-24.2/538/566 condensing steam turbine in Jiangsu Ligang Electric Power Co., Ltd. has been made during start-up after its overhaul. A certain effects have been obtained based on revision of the operating parameters and adjustment of the shafting center. Moreover, some improvement measures have been put forward on the respects of operation and maintenance
  • Operation & Retrofit
    Start-up Optimization of a 600 WM W-flame Boilerwith Tiny-oil Ignition Technology
    ZHANG Guang-zhu, CHENG Zhi-hai, ZHOU Wen-tai, HE Xiang
    2012, 26(3): 179-182.
    Abstract ( )   Knowledge map   Save
    In view of improving the tiny-oil ignition burner for a W-flame boiler, an optimized adjustment has been made on the primary air speed, circumferential air baffle opening, coal mill operation mode, total air volume and other aspects through tests, based on which a cold-state start-up has been successfully realized for the first time directly with anthracite powder and without warming the furnace previously.
  • Operation & Retrofit
    Operation Optimization of the Circulating Pump for a 600 MWPower Unit after its Frequency Conversion Retrofit
    QU Wei-ming
    2012, 26(3): 183-185.
    Abstract ( )   Knowledge map   Save
    The closed loop cooling tower is adopted for the circulating water cooling of a 600 MW power unit and the house power of the circulating pump was 1.0 percent. To further reduce the house power consumption of the circulating pump, a frequency conversion retrofit has been made so as to achieve a continuous adjustment of the circulating water. Based on test results obtained after retrofit, an optimization scheme is proposed for operation of the retrofitted circulating pump of a 600 MW power unit.
  • Operation & Retrofit
    Diagnosis and Treatment of Oil Whirl and Whip in Tilting-pad Bearings
    ZHU De-yong
    2012, 26(3): 186-188.
    Abstract ( )   Knowledge map   Save
    During the commissioning process of a 1000MW steam turbine unit, an analysis was carried out on the unsteady vibration fault occurring in the tilting-pad bearing. Based on the vibration characteristics, the oil whirl and oil whip existing in the tilting-pad bearing are found to be the main causes leading to the intensified vibration, which has finally been reduced by extending the length and enlarging the turning radius of pipeline in jacking oil system.
  • Operation & Retrofit
    Application of New Technologies in Retrofit of a 300 MW Steam Turbine
    CAI Dong-xu, SHAO Zhi-xiang, YE Cheng-guang
    2012, 26(3): 189-193.
    Abstract ( )   Knowledge map   Save
    The new technologies applied in the retrofit of a 300 MW steam turbine have been described and discussed from following four aspects such as the high-medium pressure cylinder, the low pressure cylinder, the advanced blade cascade and the steam leakage reduction, etc. Related indications have been improved obviously after retrofit of the steam turbine unit.
  • Operation & Retrofit
    Performance Analysis of a Domestic 350 MW Supercritical SteamTurbine and the Improvement Measures
    QIN Jian-zhu, TAN Long-sheng
    2012, 26(3): 194-197.
    Abstract ( )   Knowledge map   Save
    The current development status of 350 MW supercritical steam turbine has been introduced. Taking eight 350 MW supercritical units already in operation for example, their technical differences are compared and their performance status is summed up. Simultaneously, main factors affecting heat consumption rate of the turbine have been analyzed, while major measures to reduce the heat consumption rate put forward including the overhaul details. Obvious results have been obtained after implementation of all the measures.
  • Operation & Retrofit
    Vacuum System Optimization for a 600 MW Double Back Pressure Steam Turbine
    YU Zhu-zhong, YU Xiao-long, LI Jian-jun
    2012, 26(3): 198-200.
    Abstract ( )   Knowledge map   Save
    To solve the problem that double back pressure cant be formed in a 600 MW steam turbine due to too close of pressure in the high and low pressure condenser, an optimization is made to the pipeline arrangement in the vacuum system. In this way, double back pressure is effectively formed in the high and low pressure condenser, and the unit vacuum degree is greatly raised, based on which both the stability and the economy of the unit are increased.
  • Operation & Retrofit
    Control System Retrofit for Electrostatic Precipitatorin a 900 MW Thermal Power Unit
    WANG Jue
    2012, 26(3): 201-203.
    Abstract ( )   Knowledge map   Save
    Composition of an electrostatic precipitator has been briefly introduced, while problems existing in the precipitator analyzed, such as the high energy consumption, unstable communication and laggard high-voltage rectification equipment, etc. Causes leading to above problems are analyzed, based on which a retrofit is made by altering its high-frequency power source, modifying the control logic and changing the network communication mode. Obvious energy-saving effects and high working reliability have been obtained after the retrofit.
    • Cleaning Energy
  • Cleaning Energy
    Plant Test Project for MW Wind Turbines
    TAN Qi-sheng
    2012, 26(3): 204-206.
    Abstract ( )   Knowledge map   Save
    Regarding the keen competition in wind power industry in recent years, the main countermeasures are to assure quality, reduce cost and improve efficiency. A plant test project has been put forward for wind turbine to ensure its delivery quality, avoid twice hoisting assembly, reduce relevant commissioning work and increase the commissioning efficiency.
  • Cleaning Energy
    Manufacture Technology of Planet Carrier for Wind Turbine Gearbox
    WANG Li-na
    2012, 26(3): 207-209.
    Abstract ( )   Knowledge map   Save
    Planet carrier is one of the main support components of the planetary gear in speed-up gearbox for wind turbines, to which a very high strength is required since its easy to fail due to tough service conditions. Regarding the status, measures have been proposed and taken, such as renewing the technological equipments, optimizing the smelting process, etc., which have significantly improved the manufacturing quality and process level.
    • Environmental Technology & Equiment
  • Environmental Technology & Equiment
    Discussion on Denitrification Mode of Small and Medium Coal-Fired Boilers
    LI Qiang, CHEN Wei
    2012, 26(3): 210-212.
    Abstract ( )   Knowledge map   Save
    Technical features of the SNCR-SCR combined denitrification method have been described, while a comparison made between the SNCR-SCR combined method and traditional denitration modes on technical and economical aspects. Results show that the SNCR-SCR method has advantages of high safety, low investment, low operation cost and high flexibility, which is therefore applicable for small and medium coal-fired boilers, especially reconstruction projects.
    • Power Plant Management
  • Power Plant Management
    Quality Supervision during Overhaul Outage of a Nuclear Power Plant
    HUANG Xiao-yu, ZHANG Zong-yuan, LU Bo-liang, ZHOU Xiao-bing
    2012, 26(3): 213-215.
    Abstract ( )   Knowledge map   Save
    Working contents of quality supervision during overhaul outage of a nuclear power plant have been introduced, including organization of quality supervision, overhaul preparation audit, maintenance process supervision, corrective actions and experience feedback, which may serve as a reference for quality supervision during overhaul outage, so as to raise the operation reliability of nuclear power plants.