Integrated Intelligent Energy

Application of double-membrane method in desalted water station of the Power Plant in Hansteel′s New Developing Area

LI Hongxiu;LI Qingzhu

2010, 32(1): 1-3.

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The water source and the water quality condition of the desalted water station of the Power Plant in Hansteel′s New Developing Area were introduced. Based on this, the technical indicators of water source and water quality were analyzed. The doublemembrane method water treatment process was discoursed in detail. And, according to its characteristics, the feasibility of application of this water treatment process in the desalted water station of the Power Plant in Hansteel′s New Developing Area was demonstrated. The practice result shows that the water treatment process satisfied the requirement of supply water quality of desalted water station, and excellent application effect was obtained. 

Online reform of chemical water processing programmed control system in power plant

BAO Xiaojun

2010, 32(1): 4-7.

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The problems, which were existed in the chemical water processing programmed control system such as the devices were aged, the reliability was low, the availability factor of the programmed control was low, the functions were imperfect, the upper level processor of HMI was crashed, the signal communication was blocked, the supply voltage of the field electromagnetic valve was too low，and others, were analyzed. The reformation scheme of the programmed control system and the implement process of the scheme were introduced. The software upgrading and merging, the software and hardware simulation test and the construction and debug in step mode were described. The concrete methods and experiences of programmed control PLC system reformation of chemical water system during unit operation were summarized.

Reformation of condensate precision processing system

FAN Yehui

2010, 32(1): 8-9.

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In Hunan Datang Shimen Power Plant, the condensate precision processing system can not operate normally due to its bad effect of resin regeneration and separation. Based on utilizing original equipments as much as possible, the condensate precision processing system had been reformed, and in the reformation, the high tower separation method with better effect had been adopted for regeneration system. After the reformation, the condensate precision processing system operates more steadily and economically.

Measures for improving output water quality of clarification pool

LI Zhongxiu

2010, 32(1): 10-11.

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The measures used in making up water treatment process of China Huadian Fulaerji General Power Plant were produced, in which the impurity in water can be translated into sediment and be separated out, and the measures include the sedimentation of suspended substances, the coagulation treatment, the sediment discharging and others. Simultaneously, the methods for improving the output water quality of clarification pool with mechanical stirring were discussed.

Influencing reasons and solving measures of effluent water quality of clarifier

ZHONG Jike

2010, 32(1): 12-15.

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The water supply of the chemical water treatment in Heilongjiang Yadian Xinbao Heat and Power Corporation Limited is the water of Nenjiang River. Before 2004, the effluent water of the clarifier often was not qualified, and the phenomenon of serious water quality deterioration was occurred in flood period of almost every year. Based on experiment of long time, the reasons influencing on the effluent water quality of clarifier in different period were analyzed indepth, and concrete solving measures were put forward. Then the difficult problem of effluent water quality disqualification had been thoroughly solved.

Operation maintenance and management of reverse osmosis system of Wangting Power Plant

YANG Shaohua;ZHANG Qing

2010, 32(1): 16-17.

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In practical operation of reverse osmosis system of Wangting Power Plant, some problems were occurred, which includes that the output water turbidity of multimedia filter was higher, the pressure difference between water inlet terminal and concentrated water terminal of reverse osmosis device was higher, the rate of desalination was lower and others. The problems were analyzed. Some measures were adopted, which include that to change the locality of adding medicine, to adjust the operation condition of active carbon and the backwashing condition, to change the connection of low pressure flushing pipe and others. Then the abovementioned problems were solved, and the security and economical efficiency of reverse osmosis system were enhanced.

Design and research of fire prevention plugging in instrument and control system

LIU Nianjing;CHEN Yanjun;XU Aidong;ZHANG Dandan

2010, 32(1): 18-21.

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A practical example of fire prevention plugging for instrument and control system in JHARSUGUDA IPP 4×600MW units of India was discoursed, and its design thought of fire prevention plugging for the cable tray, the cable shaft and the I&C panel was analyzed; and the result can be used as reference for design of I&C fire prevention plugging.

Realization of distributed process data calculating platform based on ‘.Net’

JING Chao;;HUANG Xiaobin;LIU Yanquan;ZHANG Xiaogang

2010, 32(1): 22-25.

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The system structure of ‘.Net Remoting’ was analyzed, and the application of ‘.Net Remoting’ technique in distributed process data computing platform was studied. Through the design of directory services, configuration services and computing services in the system, the structure of distributed computing platform with characteristics of flexible deployment was accomplished. The module components were designed and calculated to provide basic modules and application modules for computing task configuration. Taking the production target examination of power plant as example, by using the distributed platform, some difficult problems, such as the frequent varying of examining rules, the complexity and variation of calculation task and the parallel processing of realtime data and history data, were properly solved.

Improvement of damper control logic in air and flue gas system

ZHANG Tailin;WU Penghui

2010, 32(1): 26-28.

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The control of electrical damper of air and flue gas system concerns safety and stable operation of boiler. Especially, in fault treatment process of air and flue gas system, if the air and flue gas system electrical damper could not be closed correctly and timely to isolate the fault, the fault will be enlarged. The hidden hazard existed in air and flue gas system electrical damper control logic of 4×300MW+2×600MW units in Sichuan Guangan Power Generation Corporation Limited was analyzed, and an improvement suggestion was put forward.

The network implementation and management of monitoring system of Xitang River diversion project

HUANG Jian

2010, 32(1): 29-31.

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The computer monitoring system of Xitang River diversion project consists of several subsystems such as computer centralized control subsystem, local monitoring subsystem, video security subsystem, water quality monitoring subsystem and information management subsystem, and the subsystems were connected together by main optical fiber fast network. The design principle, the structure, the system software, the security measures and the operation management of the network were introduced.

A decision method of production process data stability

LI Na;HUANG Xiaobin;TIAN Zhiqiang;SUI Liying

2010, 32(1): 32-34.

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By analysis of characteristics of production process data, the necessity of deciding the stability of production process data was explained. Three common data stability deciding methods were introduced, and based on the analysis of their advantages and disadvantages, a new production data stability deciding method—the secondary stability algorithm was put forward. The algorithm includes two parts, which are deciding process of data stability in fixed time segment and searching algorithm extension. Its core content is to compare the probability and relevant stability indicators of data occurred in range near the average. Taking the concrete data of the Panshan Power Plant as analyzing example, the results of abovementioned methods were compared, and it was proved that the secondary stability algorithm is more rational testing method with better robustness and higher accuracy.

Design of fuzzy controller of main steam temperature

DUAN Aixia;HUANG Yongzhi;LIU Ziyu

2010, 32(1): 35-38.

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The main steam temperature controlled object has large inertia, long time lag and timevariation in thermal power plant. In order to enhance the economy and safety of thermal power plant, it is usually required that the main steam temperature control system should have higher performance indexes. However, better performance can not be achieved with traditional control methods which use the normal PID cascade control. In order to improve the regulation quality of the PID controller of main steam temperature, a new fuzzy setting method by using the fuzzy rules of mainsteam temperature system was designed, and the relevant structure of the hardware and software design based on MCS89C52 singlechip computer were introduced in this paper. The simulation results show that this model can online modify its controller parameters to maintain the performance indexes of control system approximately invariable when working conditions change. It has practicable significance for engineering application.

The reason of leakage of water level indicator with electrical contacts in a steam drum of waste heat boiler

ZHANG Haoliang

2010, 32(1): 39-40.

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Based on the using experience of water level indicator with electrical contacts in a steam drum of waste heat boiler of S109FA gassteam combined cycle unit, the structure, the material, the environment and working characteristics of the water level indicator with electrical contacts were introduced; and the frequent leakage faults of the indicator were analyzed. In order to reduce the leakage fault and raise the reliability of measurement, some feasible solving methods were put forward.

Frequency conversion reformation of condensate pump and application in 600MW unit

YANG Jianping;ZHAO Zuoqi

2010, 32(1): 41-42.

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The problems existed in condensate system of 2×600MW coalfired units of Huadian Baotou Power Generation Corporation Limited were analyzed. The problems, such as pipe vibration of condensate system, were solved, and obvious energysaving effect was obtained. The result can be used as reference for similar units in frequency conversion reformation.

Reason of high temperature corrosion of boiler water wall and countermeasures

LIU Zhaojun

2010, 32(1): 43-45.

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In July 2008，during minor repairs of #1 boiler of Shengli Power Plant，high temperature corrosion of boiler water wall tubes in large size was found， and by inspection, total 129 tubes had been determined must be replaced due to that the thinning of tube wall was exceeded the limit. According to analysis of high temperature corrosion of #1 boiler water wall tubes, the reasons of high temperature corrosion were found, and the relevant prevention measures had been worked out. Then the hidden dangers for safe operation of the boiler were eliminated.

Longitudinal zero sequence voltage protection and its malfunction analysis

XIE Yong;MA Jingjing

2010, 32(1): 46-48.

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The fundamental principle and actual settings of reference of longitudinal zero sequence voltage interturn protection of generator were introduced. The reasons of malfunction of zero sequence voltage protection were analyzed. Aiming at various field reasons of malfunction of zero sequence voltage protection, the solving methods and preventative measures were proposed.

Reasons of high temperature corrosion in power plant boiler and preventive measures

ZHOU Xingang;MIAO Changxin

2010, 32(1): 49-50.

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Based on the mechanism of high temperature corrosion, considering the boiler design parameters, the coal grade, the operation and the aerodynamic conditions in furnace, the reasons of high temperature corrosion were analyzed. The preventive measures were put forward correspondingly, providing reference for solving similar problems.

Antiabrasion measures of pressure elements of circulating fluidized bed boiler

ZHAO Lingjun

2010, 32(1): 51-53.

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Based on the research of operation law of CFB boiler，the influencing factors on pressure elements of CFB boiler were summarized. By using process control method, aiming at the processes of design, installation, operation and overhaul，the effective control measures of antiabrasion were put forward.

Application of idlestroke coupling and oil pressure slow closure device in slopingseat check valve

HU Xiaofeng

2010, 32(1): 54-57.

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The problems of common suspendedstart check valve existing in water system were analyzed. The characteristics of novel multifunctional idlestroke coupling slopingseat check valve and its action in different conditions were summarized. Some problems needing attention and suggestions of idlestroke coupling check valve and oil pressure slow closure device in device adjustment and system operation were put forward. Based on the practical application effects, the key points in overhaul and adjustment of idlestroke coupling slopingseat check valve were summarized, and the necessity of their popularization was discussed.

Reformation of control system of CFH-II type side tipper

ZHAO Liang;ZHANG Tao;ZENG Fanhui

2010, 32(1): 58-63.

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In the reformation of programming control for tipper, the OMRON-C200H type programmable logic controller (PLC) made in Japan was used as the core of control system. The secondary circuit control part of original control system, which was mainly made up of relays, was replaced fully by PLC. The PLC has many advantages, such as the high reliability, the little maintenance workload, the flexible control configuration, the high control accuracy, the good extensibility and others. After the reformation, the full automatic operation of tipper was realized, and the reliability of tipper system was enhanced.

Discussion about structure design of floating debris obstructing row once again

SU Zhenrong ZHU Shaoqiang

2010, 32(1): 64-66.

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Several types of support structure of floating debris obstructing row were introduced. The application effects of these types of support structure in practical projects were discoursed. According to the comparison of two practical projects, the improvement measures of indirect forced support structure type for transition floating box was proposed.

Reason analysis of regulating damper jam fault in inlet of induced draft fan and treatment

ZHANG Jinbao;SU Jingwen;LI Jianshan

2010, 32(1): 67-68.

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In order to reduce power consumption, the speed of the induced draft fan of Sanhe Power Generation Corporation Limited is controlled by hydraulic coupling. But the oil temperature of hydraulic coupling was too high, so the combined adjustment mode of hydraulic coupling and regulating damper had been adopted. The regulating damper was adjusted in a smaller range in long time; therefore the actuating element was worn seriously and caused the damper jam. The material of regulating damper actuating element had been replaced, and the unit normal operation was ensured.

Design, operation and test of deep energy conservation equipment of a power plant

HUANG Xinyuan

2010, 32(1): 69-70.

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The main designed characteristics and structure parameters of the deep energy conservation equipment of #4 unit in a power plant in Shandong were introduced, and the commission and operation results were presented. The test results showed that putting this deep energy conservation equipment into operation would decrease the outlet gas temperature by 55～65℃, reduce the generation coal consumption rate by 4.2～4.5g/(kW·h), reduce water consumption by 155kt/year, and the annual economical benefit will be 3.40 million Yuan.

Optimization of detailed design of limestonegypsum wet flue gas desulphurization system

ZHANG Yuming;ZHONG Shanxia;WU Hao

2010, 32(1): 71-72.

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The limestonegypsum wet flue gas desulphurization technology and desulphurization projects being in operation were studied and analyzed. Some skills for detailed design optimization of the subsystems of desulphurization system were described. These skills can be used as reference for FGD engineering design.

Situation and development of solar photovoltaic power generation industry

LüBei;QIU Hemei;ZHANG Yu

2010, 32(1): 73-76.

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The situation of solar photovoltaic power generation market and the development history of solar photovoltaic industry were described. The technique of solar photovoltaic cell and the policies of countries in promoting the development of photovoltaic power generation industry were introduced. The domestic photovoltaic power generation prospect was surmised.

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