Integrated Intelligent Energy

Application of sonic sootblower and monitoring platform in air preheater of 1000MW unit

LV Hongbiao1, JIA Jianchao2, SHI Henghui1, ZHANG Rongchu3, LIU Yuqing3

2014, 36(7): 1-3.

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Abstract:The problems occurred in operation of the air preheater of a power plant were introduced. The feasibility to additionally install the frequencyadjustable highsound intensity sonic sootblower and to develop the pollution online monitoring platform was analyzed. The application result shows that after the frequencyadjustable highsound intensity sonic sootblower had been installed, the pressure difference of the air preheater decreased obviously, and remarkable economic benefit and social effect were obtained.

Research on power measuring method load rejection test for nuclear power unit

ZHANG Juncheng

2014, 36(7): 4-9.

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Abstract:The potential risk factors of nuclear power unit in conventional method load rejection test were analyzed. Combining with the features of the turbogenerator set used in nuclear power station, the technology of the power measuring method load rejection test for nuclear power unit was demonstrated. The ideas of process control and data analysis of the power measuring method load rejection test for nuclear power unit were put forward. The principle scheme of power measuring method load rejection test for nuclear power unit was designed, and the security of the nuclear power unit load rejection test was improved.

Study and application of synchronous control system of ship lifter main lift cylinder

SONG Yuanzhuo, NI Jia, FU Qiang

2014, 36(7): 10-11.

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Abstract:In order to ensure the stability and safety of the ship lifter operation and to improve the operation efficiency and the service life of the ship lifter, a synchronous control system of the ship lifter main lift cylinder based on electrohydraulic proportional technology was proposed. The principle, the composition and the application of the system were introduced. The system ensures the main lift cylinder of the hydraulic lifting type ship lifter to operate synchronously, and the stability of the system operation was improved.

Design and development of graphic platform of integrated monitoring system for smart substation

WANG Dongxia, SHI Guangde, ZHONG Yun, TAN Tingfang

2014, 36(7): 12-15.

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Abstract:The current general graphic platform can not satisfy the requirement of smart substation in integrated information processing. A new graphic platform based on the standards IEC 61790 and IEC 61850 was developed. Many functions are integrated in the new platform, which include the unified modeling of graphic model library of primary and secondary equipments, the integrated primary and secondary equipments mapping access components, the integrated configuration tools, the topological analysis and coloring based on CIM package and so on. The platform can be used to monitor the power grid operation status and the equipment operation data. By the platform, the power system information integration and modeling technology sharing can be realized. In addition, the remote browsing of the state grid and the source side maintenance of the China Southern Power Grid can be realized. The equipment graphic primitive layermanagement function and the advanced plugin component management function were integrated. The embedded threedimensional figure display function was added. The integration level and the operation and maintenance level of the system were raised. The system was put into trial operation successfully in a smart substation in Ningxia.

Realization of boiler safety monitoring using PI-Process Book system

ZHANG Guobin

2014, 36(7): 16-17.

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Abstract:The realtime data acquisition system PI-Process Book is combined with Excel. The collected boiler monitorig data are compared with normal value continuously. The results are used to decide if the boiler parameters and the equipment operation are normal. The realtime monitoring of boiler is realized. Then the unit continuous automatic operation, the automatic alarm and alarm record are realized. The system can give prealarm of abnormal situation of boiler equipments and parameters, which provides more sufficient time for unit accident treatment.

Research on improvement of hydraulic cylinder beedback structure of axial flow fan with adjustable rotor blade of 1000MW unit

ZHOU Liming

2014, 36(7): 18-20.

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Abstract:The practical problems encountered in site were analyzed. Combining with the fault treatment experiences, under normal operation condition of the axial flow fan with adlustable rotor blade, the output feedback structure of the hydraulic cylinder of the axial flow fan with adjustable rotor blade was improved and optimized. After the improvement, various hidden troubles of the fan, which may cause high fault rate of the fan cylinder, were eliminated thoroughly, the fan outage accident and the MFT accident were avoided, and the operational reliability and stability of the boiler air flue gas system of the power unit were improved effectively.

Analysis on fault reasons of coal pulverizing system of 600MW boiler and treatment countermeasures

CHEN Yi 1, ZOU Xiangjie 2

2014, 36(7): 21-23.

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Abstract:The fault often occurred in coal pulverizing system of the 600MW boiler in Fujian Zhangzhou Houshi Power Plant, and which threatens the save and economic operation of the unit in some degree. The common fault types of the coal pulverizing system were expounded, the reasons of the faults were analyzed, and the treatment countermeasures were proposed. The experiences of the power plant provide reference for other power plants to treat similar faults.

Adjustment of installation offset value of supports in operation process of power plant

CHEN Chunhui 1, PAN Jianhang 1, ZHANG Fengshou 2

2014, 36(7): 24-25.

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Abstract:The reasons of damage of high pressure bypass attemperating water supports in operation process of a power plant were analyzed. The effective temporary supports were installed, and then new supports were redesigned and installed. The problem of adjustment of installation offset value of the spring supports in operation process was solved effectively, which provides reference for handling with similar problems.

Measurement and control of pulverized coal feed quantity for pulverized coal boiler of power plant

LI Guang, LI Ruitu, LI Jin

2014, 36(7): 26-27.

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Abstract:The factors influencing on pulverized coal flow in pulverized coal conveying pipeline were analyzed. The problems existed in combustion process of pulverzed coal boiler in power plant were expounded. The principle and the defects of the microwave solid flowmeter were introduced. A newtype microwave solid flowmeter was adopted. The defects of traditional microwave flowmeter were overcome. The realtime noncontact measurement of the pulverized coal density was realized, and the pulverized coal feed quantity of the pulverized coal boiler was controlled effectively.

Application of field bus technology in automation control of power plant

WANG Zheng

2014, 36(7): 28-31.

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Abstract:The definition and the standard of the field bus control system was introduced. The features of the distributed control system (DCS), the programable logic controller (PLC) system and the field bus control system (FCS) were compared. The matters needing attention in appliction of field bus technology in automation control of power plant were summarized.

Introduction of CPI Inner Mongolia Siziwang Banner Wind Power Heat Supply Project and its demonstration effect

WANG Jianqiang

2014, 36(7): 32-33.

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Abstract:In Inner Mongolia and other areas with rich wind resource, in the winter heat supply period, there is difficulty for power grid in wind power accommodation. The CPI Inner Mongolia Siziwang Banner Wind Power Heat Supply Project was introduced. To use the wind power instead of coalfired boiler to supply heat for cities and towns can increase the local wind power accommodation capacity and lighten the pressure of the power grid in power longdistance transmission. The project is useful for effective utilization of wind energy and reducing consumption of coal and other fossil fuels.

Synchronizing rapid cooling of steam turbine and boiler maintenance use vacuum method

WU Chunchao, CHEN li

2014, 36(7): 34-36.

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Abstract:The ultrasupercritical steam turbine of a certain power plant 1000MW was not installed with rapid cooling module. Under condition of did not transform system equipment, synchronizing rapid cooling of turbine and boiler maintenance by vacuum method, which has decreased unit energy consumption when startup rapid cooling, and increased economical efficiency of power plant. 

Analysis on weld crack in support's lining plates of steam pipeline of power plant and treatment

HAO Dongfu

2014, 36(7): 37-38.

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Abstract:In a power plant, during the unit maintenance period, by means of metal inspection, it was found that there were cracks in the support’s lining plates of the main steam pipe and the hightemperature reheat steam pipe. The reasons were analyzed, and the experiences of repair welding were summarized. The defects were eliminated successfully. The measures for ensuring the lining plates to operate safely for long time were proposed, which can be used as reference for treating similar problems.

Analysis on a false trip accident of 10kV line protection

LIANG Yongxin, WU Dongdong, SONG Yufeng, MA Yongzhan

2014, 36(7): 39-41.

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Abstract:Aiming at the false trip accident of the 10kV line protection in an 110kV intelligent substation, the protection devices and the secondary circuit were inspected, and the site record files were analyzed. It was determined that the reason of the false trip accident is abnormity of the AC current sampling of the protection, and the reason of the abnormal AC current sampling is looseness of the AC plugin components, which causes floating voltage in circuit. At last, the relevant preventive measures were proposed.

Analysis on reasons of higher secondary stage rotor disc temperature of M701F gas turbine and treatment measures

ZHANG Jun

2014, 36(7): 41-43.

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Abstract:The structure and the working principle of M701F gas turbine were introduced. The reasons of higher secondary stage rotor disk temperature and its influence on the unit were analyzed. According to existed overhaul experiences, relevant treatment measures and improvement suggestions were put forward.

Remodeling of condenser of 330MW unit and energysaving effect analysis

PAN Guangqiang, ZHENG Xiaohong

2014, 36(7): 44-46.

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Abstract:In Huadian International Shiliquan Power Plant, the copper pipe of the condenser leaked frequently, and the condenser backpressure was increased. Aiming at above problems, according to the comparison, the reformation scheme of tube bundle displacement was selected. The features of the Tepee tube bank and the concrete reformation items were introduced. The contrast test of the performances before and after reformation shows that the problems of larger condensate hardness and higher condenser backpressure were solved effectively. After the condenser had been remodeled, obvious economic benefit was obtained, the investment payoff period is only 1.79 years, and the reliability of the equipment operation was improved greatly.

Discussion of technology of “merging three towers into one” used in 660MW coalfired power plant

TIAN Zhiye

2014, 36(7): 47-48.

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Abstract:The differences between the conventional coal fired power plants and the power plants, in which the technology “merging three towers into one” was adopted, were analyzd. The features of the power plants, in which the technology “merging three towers into one” was adopted, were summarized. Combining with engineering practice, some design requirements of the power plants, in which the technology “merging three towers into one” was adopted, and problems needing attention were put forward.

Optimized configuration of reactive compensation capacity of wharf coal conveying system and implement effects

LI Qingchang

2014, 36(7): 49-51.

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Abstract:The working condition of the wharf coal conveying belt system and the operation status of the existing reactive compensation device were introduced. The several factors leading to lower power factor were analyzed. It was pointed out that the higher or lower active load and reactive load and the differences of the motor characteristics can influence on the power factor of the system directly. Based on this, depending on the deep calculation, an optimal configuration scheme of the reactive compensation was proposed. After the scheme had been implemented, better results were obtained.

Control technology and application of emergency power supply

MA Hongtao

2014, 36(7): 52-54.

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Abstract:The original control technical scheme of emergency power supply system for Hubei Huadian Xisaishan Electricity Generating Corporation Limited were introduced , encountered problem during implementing process of the original scheme were discussed , reason that control function of emergency power supply system can not be put into use, and put forward new scheme for control of emergency power supply system were analyzed. After implementation of the new scheme, preferable result has been achieved.

Analysis on example of 380V AC contactor unable to reset

LIN Xiguo, YANG Qian

2014, 36(7): 55-56.

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Abstract:Due to loop resonance, a 380V AC contactor is unable to reset normally. The abnormal phenomenon was analyzed by numerical calculation. The analysis result shows that the main reason of the problem is the influence of the distributed capacity of the cable. A solution was proposed, which is to connect an additional contactor parallel with the original contactor. The matters needing attention in field application of 380V AC control circuit were given.

Application of pebble coal negativepressure pneumatic conveying system in Qingshuichuan Power Plant Project Phase II

ZHANG Hui

2014, 36(7): 57-59.

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Abstract:The basic status of Qingshuichuan Power Plant Project Phase II was introduced. The working principle and the features of the pebble coal negativepressure pneumatic conveying system were expounded. The technical and economical indexes of the pebble coal negativepressure pneumatic conveying system and the indexes of the traditional conveying system were analyzed and compared. Combining with actual situation of Qingshuichuan Power Plant Project Phase II, the feasibility to apply the pebble coal negativepressure pneumatic conveying system in Qingshuichuan Power Plant Project Phase II was demonstrated, and the result shows that the system can satisfy the requirement of field safety production, and the problems in pebble coal discharge process, such as coal burning and dust pollution, can be solved effectively.

Influence of coal caloric value on coal cost of power generation enterprises

SHEN Hong

2014, 36(7): 60-61.

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Abstract:Taking M Power Plant as example, the relationship between the coal caloric value, the unit price of standard coal and the generation standard coal consumption rate was analyzed. The method to determine the generation coal caloric value was given. It was pointed out that for the coalfired power enterprises far from coal mine, in order to realize maximization of the power generation benefit, the coal caloric value must be selected in the range between the minimum of coal consumption rate and the minimum of the coal cost of unit electricity generation.

A research on measuring and calculating methods of energy saving benefit for the circulating water wasteheat utilization project in thermal power plant

ZHOU Chongbo1, CHENG Xueshan2, REN Huaimin3

2014, 36(7): 62-64.

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Abstract:Measurement and calculation of energy saving benefit is important link of energy saving transform project of energy management contracting mode, set circulating water waste heat utilization project of thermal power plant as research object, studied two kinds of specific calculating process of energy saving benefit measuring and calculating method for direct calculating method and plant energy were studied, analyzed theoretical consistency of the two calculating methods were analyzed ,provided reference for energy saving benefit measurement and calculation of wasteheat utilization project of thermal power plant circulating water were provided.

The operation optimization of 700MW supercritical boiler

GUI Xiaoyan, KUANG Renqin

2014, 36(7): 65-66.

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Abstract:In regard to condition of high carbon content in fly ash and low boiler efficiency caused by burning complex coal type and rather poor quality coal in the 700MW supercritical unit boiler of Fengcheng PhaseⅡPower Plant, therefore, combustion adjustment tests have been done to change the condition, such as change fineness of pulverized coal, change primary air flow, and change combination mode of coal mill etc. Optimization has been done for boiler operation mode in accordance with tests result, including choose coal type properly, confirm optimum air flow of coal mill, adjust outlet oxygen volume of boiler in time, increase loading oil pressure of coal mill grinder roll and so on. After optimization, the boiler efficiency has been increased greatly, and decreased station service power consumption rate and carbon content in fly ash, thus achieved favorable economic benefit.

Reformation and operation adjustment of electrostatic precipitator of Zhuhai Power Station

HE Lianjin

2014, 36(7): 67-69.

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Abstract:The electrostatic precipitator of units No.1 and No.2 of Zhuhai Power Station of Guangdong Yudean Group Corporation Limited was put into operation for more than a decade. According to the results of performance diagnostic test, under the present coal supply, the dedusting efficiency of the precipitator can not reach original designed value. In order to meet the requirement of the file GB 13223—2011 “Emission standard of air pollutants for thermal power plants”, the electrostatic precipitator was reformed into electrostaticbag compound dust collector. After the reformation, the mass concentration of the emitted smoke dust was reduced obviously, and the dedusting efficiency was raised significantly.

Analysis on design key points of ammonia station of SCR flue gas deNOx equipment 

TONG Bo

2014, 36(7): 70-72.

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Abstract:The selective catalytic reduction (SCR) flue gas deNOx technology was introduced. The features of the three kinds of reducing agents common used in SCR flue gas deNOx technology were compared. The characteristics of the liquid ammonia and the assessment of the liquid ammonia's endanger degree were expounded. The design key points of ammonia station were summarized and analyzed.

Selection of coalbearing waste water treatment technology in thermal power plant

HUANG Wei

2014, 36(7): 73-74.

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Abstract:The process flows and principles of two coalbearing waste water treatment technologies used in thermal power plants were introduced. Based on the practical parameters of Dapu Power Generation Company Limited, the technical features and the economical efficiencies of the two treatment technologies were analyzed and compared. The conclusion is that the ceramic tube filtering technology is more suitable for the power plant.

Optimized operation of FGD system of coalfired power plant

LI Peng

2014, 36(7): 75-76.

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Abstract:The flue gas desulphurization system of Xinjiang Huadian Hongyanchi Power Plant was introduced. The principle of flue gas desulphurization was expounded. Based on this, the feasibility of optimized operation of the FGD system was analyzed. The energy conservation measures for FGD system were proposed. After the measures were implemented, favorable effects were obtained.

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