Integrated Intelligent Energy

The Coal Consumption Data Analysis of Turbine System in Benchmarking Management

HUANG Xiang

2008, 30(9): 1-5.

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Based on the heat balance diagram of 600MW unit, the key data points in rated condition were analyzed, and relevant thermal efficiency data can be obtained by calculating according to the key data points. The coal consumption rate and unit thermal efficiency will vary with the variation of the field operation parameters. Therefore, it is can find that in which respects the unit need adjustment or reformation by analysis of key points data variation, and the key link for decrease the coal consumption rate of power plant can be grabbed. The emphasis of this paper is analysis of coal consumption data of steam turbine thermal power system, the coal consumption rate in this paper was obtained by heat balance calculation according to the relevant data of heat balance diagram.

The Research and Measures of Energy-saving and Consumption-reducing in 1000 MW Unit

REN Shang-kun;ZHAO Xun-hai;WU Yan-bin;LIN Fu-hai;DONG Wen-cheng

2008, 30(9): 6-8.

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In the Huadian International Zouxian Power Plant, a benchmarking management long-effective work mechanism of‘Comparing with advanced， checking error and correcting malpractice, continually improving, uninterrupted exceeding’ was established, and adequate attention was paid to the energy-saving and consumption-reducing work. According to the actual operation of two 1000 MW units, the concrete methods and measures for energy saving and consumption reduction were analyzed and introduced. Under the rated condition, the standard net coal consumptions of units No.7 and No.8 are 282.28 g/（kW•h）and 281.91g/（kW•h），heat consumption rates are 7330.94kJ/（kW•h） and 7345.4kJ/（kW•h） respectively. Since the units were brought into production, their house service consumption rates achieve 5.22% and 5.29% respectively, and the design requirement was satisfied.

Prevention and Control of Boiler ‘Four Pipe’ Leakage

ZHOU Xue-song

2008, 30(9): 9-12.

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unplanned outage is one of important benchmarking content, and boiler ‘four pipe’ leakage is the main reason caused unplanned outage in thermal power plant at long time, which influences safety and stable operation of generation equipments seriously. In the 670t/h boiler of Tianjin Junliangcheng Power Generation Corporation Limited, the heating surface was arranged unreasonably, heating surface leakage was occurred frequently. Aiming at this problem, a special anti-explosion team was established, the boiler heating surface was supervised and checked during the boiler production, erection and operation. By continuous groping and improvement, a set of effective anti-abrasion, anti-explosion experiences were summarized. The application of these experiences reduces the leakage greatly, and unplanned outage was no occurred in 2006 and 2007.

Reducing of boiler oil consumption by using tiny-oil ignition technology

THAO Han;SUN Zhi-lin

2008, 30(9): 13-15.

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The application of tiny-oil ignition combustion technology in the pressurized, direct firing, lean coal fired, 1036 t/h boiler was presented. By the actual example analysis of the Unit No.6 of Yangzhou Generation Corporation Limited, it was proved that the application of the tiny-oil ignition technology in similar boiler is feasible, and the oil consumption can be reduced considerably.

Experiment Research of Anthracite Coal Mixed Burning in Boiler

SU Xing-hui;KONG Ling-jun;WENG Shan-yong;ZHAO Hong

2008, 30(9): 16-20.

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According to the experiment research of anthracite coal mixed burning in boiler of Huadian Qingdao Power Generation Corporation Limited, the anthracite coal, lean coal and black coal with low-volatile matter mixed burning scheme was defined initially. The burning safety and economical efficiency of anthracite coal blended with different coals and at different blending proportion or under different mixed burning mode were comprehensively compared, and an optimized coal blending scheme was proposed, then the blended coal brand of Huadian qingdao Power Generation corporation Limited was formed finally.

Water Cooling System of Load Commutating Converter and Its Failure Treatment

WU Shu-quan;SHAO Jian-Qiang

2008, 30(9): 21-23.

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The essential structure and function of load commutating converter were presented. Based on this, the cooling mode, cooling effect, cooling system, cooling devices and its elements were described. The failures occurred in cooling system of load commutating converter were analyzed, the matters needing attention in water cooling system operation of load commutating converter were pointed out, and the appropriate measures have been taken, then the similar failure was avoided.

The Analysis and Improvement of Coal Jamming in Coal Hopper of Thermal Power Plant

LI Yang;CHEN Hong-tao;SONG Zhi-guo

2008, 30(9): 24-26.

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The coal jamming in coal hopper is an important problem perplexing the operation of the circulating fluidized bed boiler in power thermal plant at long time. Based on the experiences of other power plants, combining with actual situation, the coal feeding system was reformed. The square cone coal hopper was replaced by hyperbolic coal hopper, the coal spread wind system was reformed too. The problem of coal jamming in coal hopper was resolved effectively, so the coal feeding is unimpeded even at rainy days.

Analysis and Treatment of 210 MW Turbine- Generator Set Vibration

GUO Xue;CHENG Ming-du;LI Zi-feng;HE Pei-pai

2008, 30(9): 27-29.

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The vibration of steam turbine-generator set is common fault. It is very important for safety and economic operation of turbine-generator set that to deeply study the mechanism of vibration occurrence and development, to diagnose the fault correctly and to propose treatment measures timely. There was abnormal vibration occurred in a 210MW steam turbine-generator set of a corporation at low speed, and the set could not start-up normally. It is believed by analysis of the set status that the main reason caused the larger vibration of the set is the rotor mass no balanced. After treatment, the both of bush vibration and axis vibration were reduced to the ideal target.

Preliminary Research on Water Wall Design of Supercritical Once-through Boiler

DING Peng

2008, 30(9): 30-32.

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The features of spiral-wound tube water wall in supercritical boiler were expounded. Some problems needing attention in the water wall design process of supercritical boiler were analyzed. The selection of key parameters in water wall design were presented which is used in 1956 t/h, supercritical, variable pressure operation, once-through boiler of Yangzhou Second Power Plant project phase II.

The Developing of Second-Generation Air Cushion Belt Conveyor

ZHANG Qi;WEN Can-xiang

2008, 30(9): 33-38.

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There are many problems on the first-generation air cushion belt conveyor which influences its operation effect. The innovative improvement of the design theory, design method, construction of air box, section shape, throttle orifice location mode, air source matching and air supply device were accomplished, so the second-generation air cushion belt conveyor was launched. The problems of the first generation product were solved, and a reference for application of air cushion belt conveyor in power plant coal handling system was offered.

The Mechanical Failure Analysis of TLT Axial Flow Fan with Adjustable Moving Blade

LIAO Da-peng;YIN Min-quan

2008, 30(9): 39-42.

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The induced draft fan and forced draft fan of four boilers in Huadian International Zouxian Power Plant were failed repeatedly since they were put into operation. Some improvement measures were adopted, and some results were obtained. The problems existed in erection and maintenance of axial flow fan with adjustable moving blade were presented. The diagnosis of mechanical failures occurred in fan operation was described, the failure reasons were analyzed, and the handling methods were given. All these can be used as reference for whom of same trade.

Fault analysis of HM-200C1D2 hydrogen generator

XIA Wen-wu

2008, 30(9): 43-45.

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The operation faults of HM-200C1D2 hydrogen generator in Guangdong Huizhou Gas Power Generation Corporation Limited were analyzed. The effective measures aiming the faults were adopted, which includes spare parts replacement, equipment repair, system reformation and others, so the hydrogen generator returned to safety, stable and economical operation. The rational proposal for maintenance was made which lays a solid foundation for long stable operation of hydrogen generator.

Analysis of 1000 MW Unit Boiler Building Process Management

JING Xu-cheng

2008, 30(9): 46-48.

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According to the boiler building process of Huadian International Zouxian Power Plant, the production management about boiler equipment selection and boiler heating parts making was expounded. It was emphasized that must strengthen process management to prevent boiler tube cracking. The construction organization, coordination and management were strengthened, the field commission and operation were managed, the problems occurred in erection and commission were handled.

The Reformation of Lightning Protection System for Weak Current System of Wuxijiang hydroelectric Power Station

ZHOU Xin-you

2008, 30(9): 49-50.

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The reformation scheme of lightning protection system for weak current system of Wuxijiang Hydroelectric Power Station was presented, the reformation process of lightning protection system for H9000 computer monitoring system and automation equipment was described in detail. After the reformation, the system went through many times shutting down and starting up operation and several times thunder strike, and there is no equipment damaged by over-voltage. This show that the lightning protection effect of the reformed system is better.

The Damage Reason of Feed Pump Hydraulic Coupling and Prevention

HUANG Wei

2008, 30(9): 51-52.

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Combining with an actual damage accident of feed pump hydraulic coupling occurred in Jiangxi Pingxiang Power Plant 125MW unit, the reason caused damage of the feed pump hydraulic coupling was analyzed, and the prevention method was given also. This can be used as a reference for similar accident prevention or similar equipment maintenance

Application of Electromotor Soft Starter in Drainage System

LI Zai-yuan

2008, 30(9): 53-55.

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The essential principle and function of electromotor soft starter were introduced, the application of the soft starter in drainage system of hydroelectric power station was analyzed. The soft starter was compared with conventional electromotor control mode, the advantages of soft starter over conventional electromotor control mode were pointed out, and the improvement proposal for conventional control mode was given.

Discussion about the Status of Running at Daytime and Stopping at Night Gas Turbine Generator

YU Li-fan;CHENG Liang

2008, 30(9): 56-58.

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The two familiar main bus connection of gas turbine generator was introduced, the prescription about generator normal status was explained, a burned-out accident of knife switch at the generator outlet and an accidental closing of generator main breaker were described. The actuation of normal generator protection device under the case of main generator beaker accidental closing was analyzed, the status of gas turbine generator, which is running at daytime and stopping at night, was discussed also.

The Theory and Practice of Instrument- Electric Integration Electrical Control System in Thermal Power Plant

LI Yuan;ZHU Neng-fei

2008, 30(9): 59-64.

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The current electrical control mode(DCS+ECS) of thermal power plant in the domestic was analyzed, it is pointed out that under this mode there is bottleneck for data communication, and some advanced functions, such as electric equipment information management, were difficult to implement. Under the instrument-electric integration power plant control system architecture, an electrical control system scheme was put forward which implement data exchange by means of communication with DCS, the full communication ECS will be located on the DCS plateform and can implement data exchange with DCS at various network layers, so the electrical hardware secondary connection of DCS will be cancelled. Several technical key points for realization of this ECS were analyzed, which includes networking mode, evaluation of communication performance and communication in the interval layers.

Research of Static VAR Compensation Technology

TAN Jun-yuan

2008, 30(9): 65-69.

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The necessary of VAR compensation and its energy-saving function were analyzed. The function of static VAR compensator (SVC) was explained. The principle, advantageous and drawback of various static VAR compensators and there application in the electric system were expounded.

Research of high concentration ratio circulating water treatment technology in thermal power plant

SU Chang-jian;ZOU Wei-he

2008, 30(9): 70-73.

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Along with the gradual shortage of water resource, more close attention will be paid to the high concentration ratio circulating water treatment technology.
The processes of scale inhibitor selection experiment, scale inhibitor density selection experiment and dynamic simulation experiment in the circulating water treatment system of Huadian Power International Shiliquan Power Plant were described in detail, and the concrete outlet temperature of circulating water and allowed control index were obtained. The considerable water-Saving effect can be obtained by increasing the concentration ratio to 4～5 times.

Analysis of Flue Gas Denitration Technology in Power Plant

LI Qun

2008, 30(9): 74-76.

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The effective control of atmospheric pollution caused by coal-combustion is very important. It is necessary to select rational flue gas denitration technology for control of NOX pollution occurred in coal combustion. The generation of NOX at coal-burning boiler of power plant was introduced, the various denitration technical methods and related technical problems, domestic and abroad, were summarized, and this is of actual significance for selection of high-efficiency denitration equipment.

The Implementation Feasibility Analysis of Distributed Energy Supply in Shanghai

PAN Ya-hong

2008, 30(9): 77-79.

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The distributed energy supply system using heat-electricity-cool triplex co-generation technique was introduced. Its principle and technical advantageous were analyzed and compared. Taking the development of this technique in developed states as reference, combining the actual condition of Shanghai, the implementation feasibility of distributed energy supply in Shanghai was analyzed.

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