Integrated Intelligent Energy

Discussion on definition and features of distributed energy sources

XU Jianzhong 1, DENG Jianling 2

2014, 36(1): 3-5.

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Abstract:The state programme of distributed energy source development were introduced,base on the definitions of distributed energy source at home and abroad given recommend definitions. The requirements of the users were analyzed.The functions and the features and the application range of distributed energy source were described.

Interpretation and thinking deeply on new policy of distributed energy source

LI Heping

2014, 36(1): 6-7.

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Abstract:The new policies of distributed energy source were interpreted deeply and concluded. The make progress of base work for the gas distributed energy source industrial of our country were described.The development vista of the gas distributed energy source were calculated and given proposed.

Analysis on selfclimbing frame structure of luffingjib tower crane

ZHANG Qian, HU Ting, ZENG Guang, ZHAO Xiaowei, YAO Junwei

2014, 36(1): 8-10.

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Abstract:According to the selfclimbing process of the luffingjib tower crane, using the software ANSYS, the structure mechanical model of the selfclimbing frame was established and analyzed. The structure features of the selfclimbing frame were summed up, and the problems needing attention in analysis and the relevant solutions were expounded.

Operation optimization experiment of natural circulation boiler of 300MW unit

MA Liang, LIU Guofeng

2014, 36(1): 11-17.

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Abstract:Aiming at the problems existing in the 2×300MW unit natural circulation boiler of Mudanjiang Second Power Plant of Huadian Energy Company Limited, the operation optimization system was proposed. The system takes the test data as core, the influence of multiple variables on production indexes are considered synchronously in operation. A mass of operation data were collected by experiment. Using several mathematic tools, such as the artificial neural network, the statistic regression analysis and the fuzzy mathematics, a nonlinear mathematical model of the multiple variables and multiple objectives was established. The model can provide operating method and realize the online openloop guidance and closeloop control for boiler optimal operation. The application of the boiler optimal operation system in Mudanjiang Second Power Plant shows that the net coal consumption rate and the nitric oxide emission of the power plant were reduced under multiple limiting conditions, and the economic efficiency of the boiler combustion was improved

Positioning design of gate hole for the automatic cleaning machine

LIU Xiaorong

2014, 36(1): 18-20.

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Abstract:The basic situation of automatic cleaning machine were introduced.The positioning method used in automatic cleaning process were discussed. The influence of other factors on the automatic positioning accuracy were analyzed.By calculating， the installation position of the positioning sensor block were determined.

Design of programmed control system for sodium ion exchanger in heat supply network of Zouxian Power Plant

JIANG Xianzhen, ZHANG Hongjun

2014, 36(1): 21-23.

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Abstract:According to the working principle of sodium ion exchanger, the programmed control logic for the sodium ion exchanger was designed. By site debugging, its functions were perfected, and the automatic watermaking and waterreplenishing in whole process of the softened water system of the heat supply network were realized.

Design of equipment management system based on B/S frame

LU Caiyun

2014, 36(1): 24-25.

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Abstract:By means of practical investigation of production enterprise, using the advanced management idea as reference, according to the practical requirement, a set of equipment management system based on B/S frame was designed and developed. Using the system, the function of basic equipment information management can be realized, and further, the function of equipment kitting can be realized. So the efficiency of equipment management was improved greatly, and the cost of system operation was reduced.

Application of WOODWARD 505 control system in 1000MW ultra supercritical unit

LI Cunhuai 1, YANG Lei 2

2014, 36(1): 26-28.

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Abstract:The application characteristics and the control principle of the WOODWARD505 control system were introduced. The problems occurred in use process of WOODWARD505 control system were analyzed. The improvement measures were put forward, and favorable effects were obtained.

Optimized design of flow path reformation for steam turbine of 330MW unit

KONG Fanping, ZHU Baosen

2014, 36(1): 29-32.

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Abstract:In the design of flow path reformation for the steam turbine of the 330MW unit, several aspects were optimized, which include the area of the governing stage, the selection of the last stage blade, the back pressure optimization, the structural style of the cylinder body, the sealing of steam admission and steam extraction, the bearings and pushpull devices and the heat supply reformation. The actual effects show that the target of the reformation was realized, and the safety and economic efficiency of the unit were improved.

Solving scheme of water wall cracking for 600MW supercritical Wshaped flame boiler

YANG Feiping 1，YANG Zhu 1，TANG Zhenhua 2

2014, 36(1): 33-35.

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Abstract:The reasons of water wall cracking of 600MW supercritical Wshaped flame boiler were analyzed. The solving scheme including the boiler body improvement and the operation improvement was put forward, which provides reference for treating similar problems.

The research about optimization for heat supplying turbine

LI Yongbao

2014, 36(1): 36-38.

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Abstract:The operation will departure the design conditions for Thermal Power heat supplying turbines as thermal load be changed, and the unit efficiency felled as well as economy. This paper analyzes and studies how to optimize the operation mode of unit and distribute appropriate proportion of the electricity and heat supply for increasing the economy of cogeneration units.

Application of OC6000e system in DEHIIIA system of Hongyanchi Power Plant

ZHANG Junwei, ZHANG Yanjun

2014, 36(1): 39-41.

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Abstract:After the computer control parts of the turbine digital electrohydraulic control systems (DEH) of units No.1 and No.2 of Hongyanchi Power Plant were upgraded to OC6000e system, the safety performance was improved further. The debugging steps of DEH adjustment valves in the OC6000e system were introduced. The problems occurred after the computer control part of the DEH system had been upgraded were analyzed, and the solutions were proposed, which are helpful to obtain optimal control effect of DEH system.

Analysis on reasons of pipe burst accident of 220t/h boiler hightemperature superheater

WANG Jianwen

2014, 36(1): 42-46.

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Abstract:The pipe burst accident of 220 t/h boiler hightemperature superheater of a power plant occurred. For the samples of the burst pipe and the pipes around it, the macroscopic inspection, the test of strength of extension, the hardness measurement and the metallographic analysis were carried out. Combining with practical operation of the hightemperature superheater, comparing with the test result, a comprehensive analysis was done, and it was found that the main reason of the pipe burst is longterm overtemperature of the pipes. Aiming at this situation, the suggestions on subsequent work were proposed to ensure the boiler to operate safely and stably.

Reformation of balancing device of car puller

GUO Chengjun

2014, 36(1): 47-48.

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Abstract:In Sichuan Guang’an Power Generation Company Limited, the big arm of the car puller for the car dumper did not can lift up to designated place at shorter or longer intervals, which influenced on the train receiving and unloading. According to the balance principle of the car puller big arm in rising and falling process, the balancing oil cylinder had been replaced by a mechanical balancing weight. The improper lifting motion of the car puller big arm was overcome thoroughly, and the equipment operates more reliably.

Analysis on operation of primary equipments of high voltage DC convertor station and fault prevention

ZHOU Haifeng, GUO Shuyong

2014, 36(1): 49-51.

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Abstract:There is a large quantity of primary equipments in the high voltage DC power transmission system. The models of the equipments are varied, and the maintenance technologies of the equipments are different. These cause that the maintenance and overhaul of the primary equipments are difficult, and faults occur frequently. The main equipment faults of two convertor stations for recent years were analyzed, and targeted treating and preventing measures were proposed, which can be used as reference for maintenance and overhaul of convertor stations.

Analysis on vibration of deaerator in startingup initial stage and eliminating method

WANG Bin, WANG Lanlin, WU Tao, LIU Zunping

2014, 36(1): 52-53.

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Abstract:In the 670MW unit of a power generation company, the deaerator vibration phenomenon occurred several times during startingup initial stage of the deaerator. The vibration damaged the deaerator base and caused some cracks in the base, which not only influences on the equipment safety seriously, but also influences the startup speed of the whole unit. Aiming at this phenomenon, the site situation was investigated; the reason of the vibration was analyzed; the solution was proposed; and the vibration had been eliminated ultimately.

Analysis on heating surface leakage of “four pipes” of boiler and preventive measures

ZHENG Yonglu, AO Xiang

2014, 36(1): 54-57.

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Abstract:The leakage statistics of “four pipes” of HG-1021/18.2-YM4 type boiler and HG-1795/26.15-YM1 type boiler in Liaoning Huadian Tieling Power Generation Company Limited were given. Various factors causing leakage of “four pipes” and the development trend of the health of heating surfaces were analyzed. The concrete measures to prevent the leakage of “four pipes” were proposed.

Analysis on reason of damage of clamping bolt passing through core of generator stator and treatment method

XU Gang

2014, 36(1): 58-59.

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Abstract:The damage of the clamping bolt passing through core of stator of a bulb tubular turbine unit in a hydropower plant occurred during operation was introduced. The reasons of the damage were analyzed. The relevant treatment measures were adopted, which provides a reference for design, operation and maintenance of the bulb tubular turbine unit in future.

Technical reformation of bearing bush sealing of cooling fan

LUO Shutong, LI Chunlin, QIAO Jingyu

2014, 36(1): 60-62.

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Abstract:The reasons of lubrication oil leakage in sealed position of bearing bush shell of the cooling fan, which is matched with the force draft fan and induced draft fan of boiler No.2 in Fulaerji Power Plant of Huadian Energy Company Limited, were analyzed. The structure of the bearing end cover of the cooling fan was improved. A jilt oil cone was added, and the axial gap of the jilt oil cone was adjusted. The problem of oil leakage of the cooling fan was solved thoroughly.

Analysis on reasons of maloperation of 500kV line sweitch and precontrol measures

JIANG Anwei

2014, 36(1): 63-65.

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Abstract:The operation mode of 500kV system of a power plant was introduced. The configurations of the 500kV line protection and the 600MW unit protection were expounded. The process of the line switch maloperation accident and the reasons of the accident were analyzed, and the precontrol measures were put forward.

Optimization of gap control for air preheater of 1000MW unit

WANG Fangdong, GAO Lixia, WANG Jie

2014, 36(1): 66-68.

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Abstract:The adjustment principle of the rotary air preheater gap adjusting device and the problems occurred in practical application were expounded. According to the problems, the technical reformation was carried out. The better reformation effect was obtained, the probability of fault reduced greatly, and the requirement of safety production was satisfied.

Research on energysaving technology in sliding parameter shutdown process of 300MW thermal power unit

ZHENG Wenguang, SI Shunyong, ZHU Liangsong, LIU Bo

2014, 36(1): 71-73.

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Abstract:The reasons of higher energy consumption of 300MW unit with bin storage pulverizing system during sliding parameter shutdown process were analyzed. By means of replacing the pulverized coal in each bin, it was ensured that during shutdown process the pulverized coal feeder can feed the pulverized coal uniformly, and the combustion can remain stable. So the need to inject oil to help the combustion was decreased greatly, and the shutdown oil consumption of the unit was reduced. Some measures were adopted, which include to run single circulating water pump and condensate pump, to do not start the electric feed pump for water feeding to boiler, to stop the unit with deep sliding parameters and so on, and the power consumption of the unit for shutdown was reduced too.

Reformation of boiler flue gas waste heat recovery device for energy saving

LI Peng

2014, 36(1): 74-76.

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Abstract:The necessity to reform the flue gas waste heat recovery device of the 2×200MW coalfired unit of Xinjiang Huadian Hongyanchi Power Plant was expounded. The practical operation result shows that by means of reformation of the flue gas waste heat recovery device, obvious effects in increasing the economic efficiency of the unit, improving the operation safety of the desulphurization system and decreasing the gypsum rain around the chimney were obtained. The economic benefit and the social effect of the reformation are remarkable.

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