Integrated Intelligent Energy

Finite element analysis on ring beam construction truss structure of cooling tower

HU Ting1, TIAN Yongxiang2, ZHU Yuanjiang2, YAN Yuping1, LI Wei1

2014, 36(12): 1-3.

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Abstract:The general situation of ring beam construction truss structure of cooling tower was introduced. The load of the truss structure was resolved and calculated. Using the finite element software, the strength of the construction truss structure was analyzed. A truss structure optimization scheme was proposed, and adopting the scheme, the calculation result can satisfy requirements of relevant specifications.

Design and application of automatic startup and shutdown function for coal pulverizing system of 600MW supercritical unit

WANG Feng，LIN Yizhan

2014, 36(12): 4-7.

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Abstract:Taking the coal pulverizing system of the 600MW supercritical unit as example, the control strategy of automatic startup and shutdown of the coal pulverizing system was introduced. The function groups of mill heat soaking, mill startup and mill shutdown were designed. The technical difficulties of each function group were analyzed. The concrete control processes of each function group were given. The automatic startup and shutdown control of the coal pulverizing system was realized, and the effectiveness and the rationality of the control strategy were verified by the operation result of the system.

Finite element analysis on structure of electriclifting formwork platform used in chimney construction based on ALGOR software

LI Wei, ZHANG Qian

2014, 36(12): 8-11.

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Abstract:The composition of the electriclifting formwork platform structure was introduced. Using the ALGOR software, the finite element analysis on the structure of a type of electriclifting formwork platform was down. The analysis results show that the combined stress of integral structure of the electriclifting formwork platform occurs in the central arch ring, and the stress of the arch ring is closely related to the layout mode of the supporting beam of the arch above plane and the web member of the arch and the locating place of the shape steel. According to the analysis results, the platform structure was strengthened and improved.

Finite element analysis of hydraulic lifting frame structure based on ANSYS

JIANG Lei

2014, 36(12): 12-14.

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Abstract:The structure of hydraulic lifting frame was introduced. Using ANSYS software, the finite element analysis of the structure of the hydraulic lifting frame was carried out. The strength, the rigidity and the stability of the lifting fame structure were analyzed, and the unreasonable parts of the structure design were improved and enhanced. The result in this paper can be used as useful finite element design method for hydraulic lifting frame structure design.

Mineralization treatment technology using upflow limestone contact chamber

LI Hongxiu

2014, 36(12): 15-16.

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Abstract:The structure and the specification of the upflow limestone contact chamber were introduced. The design conditions of the upflow limestone contact chamber were analyzed. The superficial velocity and the empty bed contact time were calculated. The quality of the mineralized water, the performance of the limestone contact chamber under low flow and the quality of the limestone were expounded. The Langelier Saturation Index of the desalinated seawater after mineralization treatment using upflow limestone contact chamber is near to zero, so the water is more suitable for people drink.

Study on the characteristics of natural gas supersonic flow nozzle separation

ZHANG Chunlin

2014, 36(12): 17-19.

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Abstract:Threedimensional model of the natural gas supersonic flow nozzle separation were established. Numerical simulation of nozzle internal flow field via fluid dynamics used software of CFX were conducted . The maher number, temperature, velocity and pressure contours were obtained. The influence mechanism of supersonic flow for the nozzle throat structural parameter variation were announced.

Application of novel fluoroplasticmade lowtemperature economizer in thermal power plant

WANG Tiankun

2014, 36(12): 20-22.

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Abstract:The gasgas heaters of many domestic thermal power units were cancelled, which caused a lot of waste heat in flue gas. To install the lowtemperature economizer can utilize the waste heat effectively, but it will cause serious lowtemperature corrosion in the heat surface. Depending on the coalfired boiler of a 600MW aircooled unit, an application scheme of novel fluoroplasticmade lowtemperature economizer was researched. Based on calculation, analysis and economy comparison, an optimal scheme for the unit was given.

Measures for reducing startup fuel oil consumption of lean coalfired boiler

WANG Bin

2014, 36(12): 23-25.

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Abstract:Aiming at high consumption of fuel oil for startup of lean coalfired boiler, the pure oxygen ignition system of a power generation company was reformed, and a startup mode “recurrently heating from deaerator to startup flash tank” was adopted. The startup fuel oil consumption of the unit was reduced obviously. The better economic benefit was obtained, and the cost of the reformation can be recovered for a year.

Analysis on arrangement of construction machinery for 1000MW unit

SONG Guang

2014, 36(12): 26-28.

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Abstract:The structure of domestic 1000MW unit boiler and the features of lifting construction of the boiler were introduced. The different arrangement schemes of the main construction cranes were given. Combining with project examples, the arrangement schemes were compared. Based on analysis of development trend of the main lifting equipment, it was proposed that the novel movable arm tower crane is the first choice for construction of various boilers in thermal power plants.

Discussion of anticorrosion construction quality detection method of hydraulic metal structures

ZHOU Bing, WANG Hongxi

2014, 36(12): 29-31.

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Abstract:In order to ensure the anticorrosion construction quality of hydraulic metal structure products and the product service live, to grasp correct detection method is very necessary. Some items of the hydraulic metal structure anticorrosion detection were discussed, which include to formulate feasible detection process, to familiarize with the performance and application method of the detection instruments, to understand related detection standards and technical files exactly, to divide detection units and to execute the requirements of the quality management system earnestly. The results in this paper can be used as reference for related detecting persons.

Selection of main transformer ratio of Indonesia Bali Island Coalfired Power Plant

MA Hongtao

2014, 36(12): 32-34.

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Abstract:The general situation of the Indonesia Bali Island Coalfired Power Plant was introduced. The technical parameters about the main transformer ratio were checked. It was found that there were some contradictions in the main transformer ratio technical requirement proposed by Indonesia National Electric Power Company. The ratio of the main transformer was calculated. Aiming at above problem, the project contractor communicated with Indonesia National Electric Power Company, and the requirement of technical parameters of the main transformer was amended.

An efficient transformer shortcircuit current analysis method

GE Xiaojun

2014, 36(12): 35-37.

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Abstract:In order to find the value and phase of a side current of a transformer under condition of shortcircuit fault in opposite side, the method of symmetric components is used usually. But the operation of the method is more complicated. In order to understand the graph of fault recorder of the asymmetric shortcircuit fault of the transformer in shorter time and to judge out the fault nature of the transformer and the action of the protection device in the shortest time after fault, a fast transition and calculation method of the currents of two sides of the transformer was given.

Analysis on reasons of material level fault of doubleended ball mill of 1000MW unit and treatment

LI Cunhuai

2014, 36(12): 38-39.

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Abstract:The mills used in the ultra supercritical unit of Huadian International Zouxian Power Plant project phase IV are the doubleended, positive pressure directfired drumtype ball mills. The problems existed in the material level measurement system of the mills were introduced. The reliability of the material level measurement system of the mills was studied. The fault reasons were analyzed, and the improvement scheme was proposed. After the material level measurement systems were improved, the material levels of the twelve mills are all normal, and the mills can operate normally in designed material level.

Application of vibration monitoring in fault diagnosis of gas turbine blades

PENG Tongyu

2014, 36(12): 40-41.

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Abstract:Vibration monitoring is recognized as effective tool for the detection and early diagnosis of gas turbine fault. The article summarized vibration fault detection methods for gas turbine blade, introduced spectrum analysis, wavelet analysis, neural network and fuzzy theory prejudgment analysis and modelbased analysis methods in detail. The results show that, by adequately extracting the dynamic signal, most types of blades dysfunctions can be diagnosed.

Analysis of ultra large silo system development

SU Ruijie, GUO Zhibo

2014, 36(12): 43-45.

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Abstract:Compared with the traditional coal stacking storage, coal silo is with evident advantages. However, in recent years, coal silo has not get sufficient development slowly mainly because of high engineering cost. The paper introduces the optimization work on silo system in terms of process layout and construction structure, puts forward suggestions on optimizing silo design in order to enlarge silo capacity and reduce engineering cost, and meanwhile presents future research ideas of this field.

Influence of oxygen content variation on east Junggar coal combustion

WANG Yi1, LI Peng2, ZENG Qi2, ZHANG Dade2, YU Liyang2

2014, 36(12): 46-48.

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Abstract:Taking the 350MW coalfired boiler in a power plant as research object, through site test, the temperature distribution in the furnace was recorded. The influence of the oxygen content variation on combustion and coking of the boiler was analyzed. The target of this paper is to find the law of influence of the oxygen content on east Junggar coal combustion and to provide certain reference for east Junggar coalfire power plant to select proper oxygen content.

Analysis on reasons of outoflimit vibration of ring type coal crusher bearing and treatment

HOU Kezhong, LIU Hongwei

2014, 36(12): 49-51.

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Abstract:The structure of the ring type coal crusher was introduced. The outoflimit vibration of the ring type coal crusher bearing, which frequently occurred in operation of the coal crusher due to failure of the vibration damping platform, was expounded. The reasons of outoflimit vibration of the ring type coal crusher bearing were analyzed, and the method for preventing the outoflimit vibration was proposed.

Analysis on reasons of problems occurred in operation of directfired pulverizing system and treatment

HUANG Taiming

2014, 36(12): 52-53.

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Abstract:After the newbuilt 2×600MW unit of Luzhou Power Plant was put into operation, some problems always existed in operation of the coal pulverizing system, which include the blockage of the mills and the separators, the abnormal condition of the measurement points in the system, the surge of the primary air fan and others. The reasons of the problems were analyzed. The treatment measures were proposed and adopted, and the problems in the directfired pulverizing system were controlled effectively.

Numerical simulation analysis on lowNOx air staged combustion in 600MW pulverized coalfired boiler

GUO Xiaoli, ZHU Yangyang

2014, 36(12): 54-58.

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Abstract:The 600MW tangentially pulverized coalfired boiler in a power plant was taken as research object. The numerical simulation method was adopted. Under the rated condition, the influence of the traditional burner arrangement scheme, the separated overfire air (SOFA) nozzle position and SOFA air rate on the NOx emission concentration was analyzed. The speed distribution, the temperature distribution, the components distribution and the NOx concentration distribution in furnace under different schemes were researched emphatically. The computation results show that to adopt the air staged combustion technology can improve the temperature distribution and the components distribution in furnace, the fullness of air flow in furnace is also improved. The rational arrangement of OFA is useful for reducing NOx emission concentration effectively.

Problems occurred in circulating water waste heat utilization reformation of a power plant and solutions

DOU Pengfei

2014, 36(12): 59-61.

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Abstract:In order to use the heat pump technology in power plant circulating water waste heat utilization project preferably, taking Zhengchangzhuang Thermal Power Plant as example, the problems of the plant occurred in waste heat utilization project were analyzed. The solving scheme was proposed. After the scheme was implemented, better result was obtained.

Startup of circulating water system of indirect aircooled unit

GAO Yun, CHEN Yunfeng, JIN Hongwei

2014, 36(12): 62-65.

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Abstract:The water pressure loss features of the circulating water system of indirect aircooled unit were analyzed. Combining with the operation mode of the circulating water pump, the startup mode and the bypass operation mode of the circulating water system of indirect aircooled unit were expounded. The results in this paper provide theoretical basis and reference for startup and operation of the indirect aircooled system.

Theory and design of variable energy level system for deep utilization of boiler flue gas waste heat

CHANG Jiaxing1,DUAN Junzhai2, HUANG Xinyuan3, GAO Peng4

2014, 36(12): 66-69.

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Abstract:The theory and the technology route of the variable energy level system for deep utilization of boiler flue gas waste heat were introduced. The features of the energysaving effect calculation of the system were described. The technical and economical performance of exhaust gas temperature deep reducing technology was analyzed. In the system, the hightemperature flue gas is used to heat the condensate water of the turbine, and the lowtemperature flue gas is used to heat the forced air of the boiler. By the method, more squeezedout power can be obtained, and the coldend protection of the air preheater can realized all year around. Comparing the system with conventional lowpressure economizer, the net coal consumption rate is reduced by 0.5～0.6g/(kW•h), the coldend comprehensive temperature of the air preheater is increased by 30～40℃, the steam consumption for boiler forced air heating in winter is reduced to zero. The system is applicable to the boilers with relative lower exhaust gas temperature to recover the waste heat deeply.

Overview of parabolic trough solar thermal power generation system

GUO Su, LIU Deyou, WANG Pei, XU Chang

2014, 36(12): 70-75.

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Abstract:The parabolic trough solar thermal power generation system (parabolic trough system) accords with the requirement of “large capacity, high parameters and heat accumulation in long period”, which is the international development trend of solar thermal power generation technology. It is also most successful commercialized solar thermal power generation pattern in the world. The principle, the features and the classification of the parabolic trough system were introduced. The structure features and the development status of the heat conduction oil trough system and the direct steam power generation (DSG) trough system were expounded. It was pointed out that the DSG trough system using water as working medium is the development direction of the parabolic trough system.

Hoisting technology of wind turbine generator set based on main machine

LOU Jinshui, LI Taizhou

2014, 36(12): 76-77.

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Abstract:The current wind power facility lifting process is groundbased hoisting mode. In this hoisting mode, the largescale crawler crane or large truck crane are used to complete the lifting operation. The technical features, the special requirements, the technical situation and the development trend of the wind power facility hoisting process were analyzed. According to the analysis result, a new main machinebased hoisting technical scheme was proposed. The hoisting technology proposed in this paper can provide new solutions for construction and maintenance of large wind farms.

Problems existing in intellectual property rights of China in nuclear power domain and solutions

SONG Mingqiang, ZHOU Tao, FANG Xiaolu

2014, 36(12): 78-80.

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Abstract:The current situation of domestic and oversea intellectual property rights in nuclear power domain was researched. The problems existing in intellectual property rights of China in nuclear power domain, such as unperfected legal mechanism and lack of strategic consciousness, were analyzed. Aiming at the realistic problems existing in intellectual property rights of China in nuclear power domain, some solutions, such as to perfect the mechanism, to combine the industry with university and institute, to establish the strategic consciousness and so on, were proposed. The proposals in this paper are helpful to ensure the intellectual property rights of China in nuclear power domain to develop healthily and orderly.

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