Integrated Intelligent Energy

Analysis on temperature characteristics of reverse osmosis sea water desalination system under condition of constant membrane flux

SUN Lei

2014, 36(10): 1-4.

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Abstract:Based on the reverse osmosis sea water desalination pilot scale test, the operation pressure temperature characteristics and the desalination rate temperature characteristics of the sea water desalination system under condition of constant membrane flux were analyzed. Comparing the software simulation data and the site pilot scale test data, it was verified that under condition of constant membrane flux, when the temperature is increasing, the operation pressure decreases gradually, and the desalination rate decreases gradually too.

Influence of polyurea anticorrosion coating of water tank on membranemethod water treatment process system

WANG Jinchao, LIU Xiaoya, HUANG Xue

2014, 36(10): 5-7.

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Abstract:Taking the polyurea anticorrosion coating of water tank in water treatment system as example, the polyurea anticorrosion technology and the pollution of the polyurea on the reverse osmosis membrane were introduced. Combining with actual case of membrane method water treatment project, the related problems needing attention in polyurea anticorrosion construction were put forward. The result in this paper is useful for decreasing the pollution of the polyurea on the membrane system.

Requirement of water quality for hydrostatic test of secondary loop of unit No.1 in Fuqing Nuclear Power Plant and water treatment method

LIU Dongyong, SHANG Yongqiang

2014, 36(10): 8-10.

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Abstract:The target of hydrostatic test of nuclear power plant secondary loop is to verify the tightness of secondary side tube sheet of the steam generator and the pressure resistance of related system. The quality and temperature of the water used in hydrostatic test must satisfy strict requirements. The hydrostatic test items of secondary loop of unit No.1 in Fuqing Nuclear Power Plant and the requirements of the testused water were introduced. The water quality adjustment measures were discussed. The testused water preparing process was proposed, and the water prepared by above process can satisfy the requirement of the hydrostatic test fully.

Analysis on feasibility of powdered resin precoat filter to quit operation

ZHANG Ya, WANG Chunsheng, MA Dawen, HAN Shirong

2014, 36(10): 11-12.

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Abstract:At summer, the powdered resin precoal filter of a power plant easy splits from system due to higher environmental temperature. Meanwhile, the operation cost of the powdered resin precoat filter is higher. Considering above factors, the operation adjustment test of the powdered resin precoat filter in polishing system of project phase II was carried out. According to the test result, it is feasible to stop the powdered resin precoat filter in a short period, the water and steam quality does not worsen, the indexes of the water and steam are stable, and a lot of operation cost is saved.

Application of low phosphorous treatment technology in 200MW unit

MA Yanmin,SUN Naidong

2014, 36(10): 11-12.

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Abstract:The low phosphorous treatment technology was applied in the condensers of six 200MW units in Heilongjiang Huadian Fulaerji Power Generation Company Limited. The application results show that the low phosphorous treatment technology is a water treatment technology for drum boiler with higher technical requirement. By using this technology, the salification in steam turbine and steam flow path was decreased greatly; the scale formation in water wall was reduced; so the service life of the unit was lengthened, the safe and economical operation of the unit was ensured.

Experiment and research of combustion of east Junggar coal in large percentage

LI Peng，ZENG Qi，ZHANG Dade

2014, 36(10): 15-18.

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Abstract:In a power plant, in order to reduce the fuel cost and to improve economic efficiency, the technicians of the plant try to blend the east Junggar coal into the fuel coal in large percentage, and relevant experiment and research were carried out. After east Junggar coal combustion was combustion, the fuel cost was saved, and better result was obtained.

Application of integrated SCADA solution based on maxLINKS in ultra supercritical unit

WU Jun

2014, 36(10): 19-22.

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Abstract:The communication requirements between three automation systems of thermal power plant and the difficulties in realization were analyzed. The current three mainstream integrated supervisory control and data acquisition solutions were introduced. Based on this, an integrated supervisory control and data acquisition solution based on maxLINKS of power plant was proposed and successfully applied in 2×1000MW ultra supercritical unit of Huadian Jiangsu Energy Company Limited Jurong Power Plant object phase I. The practice shows that by adopting this solution, the investment and operation cost of the power plant were reduced effectively, the requirement of power plant integrated control and monitoring were satisfied, and the automation level of the power plant was improved. 

Research situation of online monitoring system of ice coating on transmission lines

NAN Fujun

2014, 36(10): 23-26.

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Abstract:The cause, the kinds and the hazard of the ice coating on power transmission line were introduced. Some research models of formation process of ice coating on transmission line and the research progresses in ice coated transmission line online monitoring technologies at home and abroad were combed. According to application of the technologies and their shortcomings, relevant improvement measures were proposed.

Analysis on fault tolerance design of coal conveying control system

YIN Qiang1, DENG Youwei1, LIU Yanjun2

2014, 36(10): 27-30.

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Abstract:Starting from the logic design of coal conveying control system and the electrical control circuit design, the design methods of the faulttolerant coal conveying control system were analyzed. The practical application shows that to adopt these faulttolerance design methods can raise the reliability and the robustness of the coal conveying control system, and then the operation efficiency of the coal handling system can be improved greatly.

Analysis on main technical parameters of rotary trash remover

CHEN Jun1，ZHAI Song2

2014, 36(10): 31-33.

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Abstract:The structure and working principle of the rotary trash remover were introduced. The main technical parameters of the rotary trash remover were analyzed. The calculation formulas of the technical parameters were determined clearly. The results in this paper can be used as reference for design and manufacturing of the rotary trash remover and for operators and managers to treat similar problems.

Study on additional internal stresses of HV power transmission tower caused by ground deformation in mining subsidence area

SHI Feng, SHI Fangliang, MEI Qian

2014, 36(10): 34-37.

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Abstract:In order to reveal the influence of the ground deformation on the additional internal stresses of the power transmission tower in mining subsidence area, according to the law of ground deformation caused by underground mining, using the finite element model simulation, the variation laws of the additional internal forces of power transmission tower under acting of the ground unidirectional tensile deformation, the unidirectional compressive deformation, the bidirectional tensile deformation and the bidirectional compressive deformation were analyzed. The conclusion is that under the acting of the ground deformation, the stress of the main material in the foundation of the power transmission tower is maximum, the stress of the main material in the lower part of the power transmission tower is medium, and the additional internal forces of the main material in the top is minimum.

Analysis and treatment of too high acid value of fireresistant oil

HE Wenbo

2014, 36(10): 38-39.

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Abstract:The acid value of the fireresistant oil of the unit No.1 in a power plant increased abnormally. The reason of acid value increase was analyzed. The concrete measures to prevent fireresistant oil hydrolysis, which can cause acid value to increase, were proposed.

Analysis on reason of tripping accident of generator stator grounding protection

ZHANG Tailin

2014, 36(10): 40-42.

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Abstract:The operation situation of the 600MW coalfired turbogenerator set and its generatortransformer set protection in a power plant was introduced. Based on inspection and test, it was found that there was stagnant water in the rubber sleeve in lowvoltage side of the main transformer, and which caused the generator stator grounding protection tripping accident. The concrete reformation and preventive measures were proposed.

Application scheme of differential protection of noninteger points phaseshift transformer

ZHOU Huanrong, XU Yongsheng, HU Liangsheng

2014, 36(10): 43-45.

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Abstract:The reasons of noninteger phase shift of transformer and the features of the noninteger phase shift were introduced. Taking RET670 transformer protection device manufactured by ABB Group in Swiss as example, the influence of the noninteger phaseshift transformer on the differential protection was analyzed. An application scheme combining the additional auxiliary CT compensation with the device software improvement was proposed.

Utilization and optimal reformation of original cooling tower in unit reconstruction project

LI Peng

2014, 36(10): 46-48.

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Abstract:In demolition and reconstruction process of the original coalfired unit, the gas displacement of the condenser of newbuilt unit was enlarged. It was determined by check computation that the original cooling tower can not satisfy the requirement of fullload generation. The optimization measures, such as to reform the cooling tower, to increase the condenser area and to increase the condenser backpressure, were proposed. After the cooling tower was optimized and reformed, the cooling efficiency of the cooling tower was maximized, and the economic efficiency of the unit was improved greatly.

Analysis on reasons of leakage area formation of boiler heating surface in 300MW unit and maintenance and prevention

SONG Kai1, YANG Yunguo2

2014, 36(10): 49-50.

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Abstract:The corrosion and damage of boiler heating surface of two 300MW units in Huadian International Zouxian Power Plant were analyzed. The treatment countermeasures were proposed. The maintenance and prevention methods were summarized. The results in this paper provide countermeasures to handling with the other boiler heating surface leakage fault.

Analysis on fast close problem of governing valve of Siemens steam turbine

XU Ruifeng

2014, 36(10): 51-53.

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Abstract:Aiming at the sudden tripping accident of the steam turbine unit during operation, it was pointed out that the fast close of the governing valve of the turbine caused a series of responses, and which caused the tripping accident of the unit. The reasons of the fast close of the governing valve and the rationality of the load rejection judging circuit were analyzed, and the concrete measures to solve the problems were proposed.

Analysis on reasons of hydrogen leakage of generator in 9FA combinedcycle unit and treatment

ZHAN Jinyuan

2014, 36(10): 54-55.

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Abstract:Taking the 9FA combined cycle unit of a power plant as example, the reasons of too large hydrogen leakage of the generator were analyzed. The targeted treatment measures were given. The measures were adopted, and the problem of too large hydrogen leakage of the generator was solved thoroughly.

Study of greenhouse gases emissions in power industry field and control strategies

WANG Hongliang, XUE Jianming, XU Yueyang,GUAN Yiming, LI Bing

2014, 36(10): 56-58.

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Abstract:The greenhouse gases emission in the fields of thermal power generation, hydropower generation and power transmission was introduced. The generation principle and the influencing factors of four kinds of main greenhouse gases, which are the carbon dioxide, the methane, the nitrous oxide and the sulfur hexafluoride, were analyzed. Combining with the features of electric power industry of China, relevant countermeasures were put forward.

Detection of catalyst used in SCR system of a thermal power plant before and after operation and data analysis

ZHANG Li, ZHU Yue, HE Sheng, YAN Min

2014, 36(10): 59-62.

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Abstract:The SCR denitration technology is domestic main technical means for NOx emission reduction. The chemical components and main parameters of the SCR denitration catalyst were introduced. The mechanical strength, the specific surface area, the pore volume and the pore diameter of the SCR denitration catalyst were expounded. The main chemical components, the abrasion strength, the compressive strength and specific surface area data of the SCR denitration catalyst of a thermal power plant were detected The detected data of two layer catalyst before installation and after puting into operation were compared and analyzed. The rationalization proposals of catalyst operation and management were put forward.

Easy distinguish method of ash deposition in ash hopper of electrostatic precipitator in thermal power plant

ZHANG Xiaobo

2014, 36(10): 63-64.

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Abstract:The harm of the ash deposition in ash hopper of electrostatic precipitator in thermal power plant was introduced. Taking the Yunfu Power Plant as example, according to the operation data of the boiler No.5 and the height of the accessory equipment in the ash hopper of the electrostatic precipitator, the data of the ash hopper under different ash level were analyzed. The two distinguish bases depending on the gasification duct and the balance pipe respectively were studied, and a distinguish method of ash deposition in ash hopper of electrostatic precipitator was proposed.

Analysis on feasibility of using SCR denitration technology to improve efficiency of electrostatic precipitator

ZHAO Li, WANG Yun, LI Zhifeng, HAO Zheng

2014, 36(10): 65-66.

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Abstract:The working principle of denitration system was introduced. The influences of the denitration system on the boiler equipments and the dust collection efficiency of the electrostatic precipitator were analyzed. The feasibility of using SCR denitration technology to improve efficiency of electrostatic precipitator was discussed. In operation of SCR dnitration system, the escaped NH3 and SO2 and the SO3 formed in catalytic conversion are useful for reducing the specific resistance of the dust and improve the adhesiveness of the dust, which are useful for improving the efficiency of electrostatic precipitator theoretically.

Analysis on scale formation on inlet baffle of induced draft fan in a biomass fuelfired power plant and solutions

HAN Wei1, MAO Jun1, FAN Haitao1, WANG Xiaolin2

2014, 36(10): 67-70.

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Abstract:There was serious scale formation in the inlet baffle of the induced draft fan of a domestic biomass fuelfired power plant, which caused the baffle opening can not be adjusted normally. So it is impossible to adjust the boiler load, and the unit can not operate safely and stably. The Xray spectrum analysis test and the Xray diffraction analysis test for the deposition were carried out, and the test results show that the deposition is NH4Cl crystalline with high purity. The components of the biomass fuel and the soil were analyzed, and the results show that the NH4Cl is mainly from the soil carried with the biomass fuel. The formation condition of the NH4Cl crystalline was discussed, and it was verified that the main factor causing scaling on the baffle is too low flue gas environmental temperature near the baffle. A hot secondary air flow was led into the inlet baffle of the induced draft fan, the flue gas environmental temperature was raised, and the scaling on the baffle was lightened. The baffle opening can be adjusted normally.

Application of gridconnected building integrated photovoltaic power system in a power plant

DING Yimin1, CHENG Lin1, DING Zhuyuan2

2014, 36(10): 71-72.

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Abstract:The development of the domestic building integrated photovoltaic power system was analyzed. A new pattern of building integrated photovoltaic power system built on roof of workshop of power plant was introduced. Combining with the 200kW building integrated photovoltaic power system of a power plant in Shandong, the features of the system scheme and the economic benefit were analyzed. The result in this paper provides reference for popularization of building integrated photovoltaic power system under the new situation.

Application and development of natural gas CCHP production system

ZHU Jianwen, SHI Lin

2014, 36(10): 73-76.

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Abstract:The current situation of domestic energy consumption structure was introduced. The development of natural gas CCHP production system was expounded. Based on natural gas power generation, the feasibility to realize the goal of improvement of China’s energy structure was analyzed. At last, this paper suggests the government to formulate CCHPrelated supporting policies.

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