Integrated Intelligent Energy

The outlook on the development of efficient flue gas treatment system for thermal power units

GUO Chunmei;ZHAO Peng;LONG Hui

2009, 31(7): 1-5.

Asbtract ( 1503 )

Related Articles | Metrics

According to the research about the recent developments of environmental protection technology in developed countries, the newest environmental protection technology for 600MW and 1000MW units in their thermal power plant were introduced. The design characteristics and technical routes for the environment friendly power plants were summarized, and a revelation was obtained that the environmental technique routes should be pluralism, and the comprehensive environment protection process conceptions for coal fired power plant should be set up. An outlook on the development of efficient flue gas treatment system for our thermal power units was given in this article.

Inquire into operation reliability of flue gas desulphurization equipment without bypass

CHEN Chuangshe;HE Xianghui;WANG Junping

2009, 31(7): 6-8.

Asbtract ( 1283 )

Related Articles | Metrics

To eliminate the bypass is an inevitable trend of flue gas desulphurization development in coal fired power plant. Two typical general arrangements of flue gas desulphurization equipment without bypass were introduced. The influence of elimination the bypass on the generator unit and flue gas desulphurization equipment was analyzed. Three measures for raising the reliability and safety of flue gas desulphurization equipment without bypass were proposed. Finally, the economical efficiency of flue gas desulphurization equipment with bypass and without bypass were compared and analyzed, and it was pointed that the cost of the flue gas desulphurization equipment without bypass is far lower than one with bypass.

Design of power source structure for coal fired power plant desulphurization system

WANG Shibo

2009, 31(7): 9-12.

Asbtract ( 1566 )

Related Articles | Metrics

The three connection schemes of power source structure for flue gas desulphurization project were compared with each other. The advantages and disadvantages of the three power source structures for flue gas desulphurization project were analyzed. Some problems for more attention in design were pointed out, and these problems can provide reference for selection of its power source structure in similar condition.

Control system design for flue gas desulphurization engineering

ZHOU Genlai

2009, 31(7): 13-15.

Asbtract ( 1329 )

Related Articles | Metrics

介绍了脱硫控制系统的设计原则，主要涉及到控制系统选型的依据、设计远程控制站的依据和优点，列举了脱硫控制系统对外的主要通讯接口，给出了系统选型和设计的建议。

Influence of sulfur content variation of coal on safe operation of desulphurization system

LIU Shude

2009, 31(7): 16-17.

Asbtract ( 1548 )

Related Articles | Metrics

Combining with the variation of coal actually fired in thermal power plant during last years, it is explained by example that when the coal quality varied, not only the variation of sulfur content must be considered, but also the influence of the low heat productivity of the coal on the mass concentration of SO2 must be taken into account. At last, some problems needing attention in operation while the parameters of flue gas diverge from the designed values were put forward.

Numerical study about influence of fin spacing on the performance of single row tube

ZHANG Wei;CHENG Yuanda;SHI Lei

2009, 31(7): 18-19.

Asbtract ( 1324 )

Related Articles | Metrics

Single row tube is one kind of basic heat exchange element for direct air cooled condensers (ACC). The research on the flow and heat transfer performance in air side of the single row tube is of great importance for the optimal design of air cooled condensers. By using the FLUENT numerical heat transfer software, the three dimensional numerical simulation for air side of single row tube under the conditions of different fin spacing was accomplished, and its flow field and temperature field were analyzed and studied. The result can be used as reference for optimal design of direct ACC system.

The study of feed water control of supercritical units

LI Changqing;BI Yanzhou;DUAN Xinhui

2009, 31(7): 20-23.

Asbtract ( 1416 )

Related Articles | Metrics

Aiming at the features of supercritical unit control, the operation principle and control strategy of feedwater control system in 600MW No.1 supercritical onethrough boiler of Fengtai Power Generation Branch Office of Huaizhe Coalelectric Corporation Limited were introduced. Based on the Star-90 simulation platform, the rationality of the control strategy was verified by simulation experiment. The control strategy can be used as reference for feed water control research of domestic high capacity unit.

Research and design of the gas chamber insulation of GIS equipment with medium voltage

SUN Jidong

2009, 31(7): 24-27.

Asbtract ( 1513 )

Related Articles | Metrics

The insulation characteristics of SF6 gas were analyzed. The engineering calculations for SF6 gas gap and surface insulation. The insulation structure was designed and the main insulation parts were selected. The pressure tight test was accomplished through the bushing, and the satisfied effect was obtained.

Phasor analysis of current and voltage fault components in fault point

WANG Jihong

2009, 31(7): 28-30.

Asbtract ( 1493 )

Related Articles | Metrics

The principle of fault component is widely applied in microcomputer protection. The fault components exist in fault component network. Therefore, it is necessary to establish the fault component network for short circuit fault, and to draw the phasor diagram of current and voltage fault component of fault point. Then according to the concept of symmetrical components, the zero sequence, positive sequence and negative sequence fault components of current and voltage can be obtained, and this is helpful for understanding the microcomputer protection based on the fault component principle.

Application of IEEE 1588 protocol in protection example value synchronization of distributed generation system

YANG Chengsheng;TANG Lijun

2009, 31(7): 31-34.

Asbtract ( 1261 )

Related Articles | Metrics

The future trend of the distributed automation system is adopting the IEC 61850 standard to realize seamless communication in the substation and between the substation and every node of the distributed system. The IEC 61850 protocol has very high requirement for sample value synchronization accuracy. The IEEE 1588 protocol was introduced and analyzed. A separate timing index generator was established, and “sideclock”function for exchanger was realized. A new accurate time synchronization scheme was proposed which is in accordance with the IEEE 1588 protocol and can be used in distributed system protection communication, and the software and hardware structure modes were given. The realization of the IEEE 1588 protocol was accomplished by using microcontroller, and the requirement of sample value synchronization of distributed protection communication system based on IEC 61850 protocol should be satisfied.

Research of optimal design for largescale thermal power plant

REN Zhenwei

2009, 31(7): 35-38.

Asbtract ( 1263 )

Related Articles | Metrics

Along with fast decrease of coal fired power generation profit, the influence of the construction cost on investment income is increasingly outstanding. To adopt optimal design and to break through the traditional convention is becoming inexorable trend. The optimal design demands to break through the habitual thinking. Based on safety and stable operation, taking the general benefit as starting point, according to the goals of simplifying processing system, optimizing the layout; decreasing the plant area and reducing the project initial investment and operation cost, the optimal design and the innovative design should be developed to ensure the economical benefit optimization of the investment and operation.

The problems and improvement measures in center cylinder of high temperature cyclone separator

FENG Changqing

2009, 31(7): 39-40.

Asbtract ( 1511 )

Related Articles | Metrics

Aiming at the various problems occurred in use of center cylinder of high temperature cyclone separator of CFB boiler, this paper analyzes the reasons of those problems. The feasible improvement measures were proposed, and after implementing the substantial results have been obtained.

The reason analysis on missing operation of safety stability device and antiaccident measures

WU Kai

2009, 31(7): 41-43.

Asbtract ( 1557 )

Related Articles | Metrics

Dongfeng Hydropower Plant has played a role of break point of south power grid and north power grid of Guiyang for ages. In its safety stability device, there is a tactics to treat the “one line tripping and another line overloading” accident of east main double circuit which is very important for thermal stability and safety of 220kV output cables of Dongfeng Hydropower Plant. In 2008, August 29, the east main circuit No.2 tripped, and then the east main circuit No.1 was overload, but the safety stability device of Dongfeng Hydropower Plant didn’t execute the established overload treatment tactics. The reason of the accident and the antiaccident measures were analyzed and introduced, and a proposal about the criterion of relevant tactics for the device was put forward.

Analysis of a shutdown accident caused by automatic air switch trip

GUAN Yujian

2009, 31(7): 44-45.

Asbtract ( 1307 )

Related Articles | Metrics

In a certain power plant,after an automatic air switch in secondary circuit of potential transformer of 6kV auxiliary working bus section of No.7 unit trip was discussioned. The distributed control system had mistake the fault for that the voltage of auxiliary working bus section is cut off, and sent out operation instruction to trip the 6kV power breaker. In the process of voltage interrupt and transfer of working bus section, the coal feed breaker tripped due to the momentary voltage interrupt, and this lead the main fuel tripping protection breaker to trip. At last, the Unit was disconnected with the system. The reason of this accident outage was analyzed, and the preventive measures of similar accident were proposed.

Installation technique of water cooled oscillating grate in boiler

YUAN Genyong

2009, 31(7): 46-47.

Asbtract ( 1365 )

Related Articles | Metrics

As an equipment for biomass power generation, the water cooled oscillating grate can ensure the straw to burn fully. The installation quality of water cooled oscillating grate will directly influence on economical benefit of power plant. The installation technique of water cooled oscillating grate was introduced in detail, and the matters needing attention in installation process were proposed to ensure the installation quality of water cooled oscillating grate to be excellent and the demand of power plant operation to be satisfied.

Reason analysis of vane servomotor fault and handling

XIAO Yuedong

2009, 31(7): 48-49.

Asbtract ( 1467 )

Related Articles | Metrics

According to the fault phenomenon of vane servomotor of unit speed governor, the fault reason of vane operation system was analyzed. The fault point was definited by using the elimination method. Combining the practical situation, the fixedblade operation mode was adopted, which was used as a emergency treatment for hydroelectric generation set and for ensuring safety operation of the generation set.

Analysis of problems in application and start up of control system of steam turbine for feedwater pump

BI Huanan;LI Hongyan

2009, 31(7): 50-52.

Asbtract ( 1405 )

Related Articles | Metrics

The service condition of control system of the steam turbine for boiler feedwater pump produced by Siemens was discoursed. The control principle of the system was introduced. The all process, in which includes the measurement of speed impulse signal, the formation of speed settings, and the creation of control instruction for the steam turbine speed, were described in detail. Combining with the concrete service condition of the system in steam turbine for feedwater pump, some problems occurred in operation and handling methods were explained tersely.

Analysis and determination of the rake capacity of rotary trash raking equipment

WANG Xu;YANG Junjing

2009, 31(7): 53-56.

Asbtract ( 1305 )

Related Articles | Metrics

By comparing of the cleaning capacity of used trash removers with each other, combining with engineering use experience, it is pointed out that for the trash removers with different orifice, the removing capacity analysis and calculation of the trash remover is necessary to determine rational parameters and to avoid design error which could cause the cleaning capacity insufficient or excess of trash remover.

Reformation of air preheater adopting flexible contact mode sealing technology

DU Zhongping;YANG Sen;YANG Zhiguo;MA Lijun;MENG Jinlai

2009, 31(7): 57-59.

Asbtract ( 1664 )

Related Articles | Metrics

The rotary air preheater leakage ratio of Datang Hancheng Second Power Generation Corporation Limited were greatly exceeded the designed value, and this seriously influenced on economical benefit of the power plant. The reason of air-preheater leakage was analyzed, and a reformation method by using flexible contact-type sealing technology was presented. Based on the comparison of air leakages and economical benefits before and after reformation, it can be confirmed that the application of flexible contact type sealing technology in rotary air preheater reformation is successful.

Application of flue gas damper in reheat temperature adjustment

TIAN Jianzhou

2009, 31(7): 60-61.

Asbtract ( 1440 )

Related Articles | Metrics

Taking a 600MW supercritical boiler of Fengtai Power Generation Branch of Huaizhe Coal and Power Corporation Limited as example, the application of the flue gas damper in reheat temperature adjustment was introduced. The control principle of flue gas damper, the practical application and the matters needing attention in application were expounded. The problems caused by flue gas damper were summarized, and some improving measures were given.

Treatment of signal interference in frequency converter

WANG Yongjun

2009, 31(7): 62-64.

Asbtract ( 1216 )

Related Articles | Metrics

The basic types of signal interfering in frequency converter were introduced. The reason of signal interference in frequency converter of 2×1000MW ultra supercritical units of Beilungang Power Plant project phase III was analyzed, and concrete treatment method was given.

Application of low temperature multieffective distilment seawater desalination technology

SUN Yuwen;ZHOU Jun

2009, 31(7): 65-67.

Asbtract ( 1273 )

Related Articles | Metrics

The sea water desalination technology includes the distillation method and the reverse osmosis method. The application of low temperature multieffective distillation technology in Tianjin Beijiang Power Plant was introduced. The features of sea water desalination technology were analyzed. The operation and control mode of sea water desalination system were discoursed. The performance parameters and guaranteed value of the sea water desalinating equipment were given.

Analysis and debugging on domestic sewage recycle treatment system

LI Changzhi;DUAN Bo;LI Zhongxiu;SONG Hongjun;MA Yanmin

2009, 31(7): 68-72.

Asbtract ( 1258 )

Related Articles | Metrics

According to the chemical monitor analysis and debugging of the latterly built domestic sewage recycle treatment system in Huadian Fularji General Electric Power Plant of China Huadian Corporation, the principle, the treating ability and the process flow of domestic sewage treatment system were discussed. Furthermore, the meanings of each chemical monitor parameters were explained. With the running of the system, the plant achieved the benefit of wastewater recycling and zero emissions.

Application of electrostaticbag precipitator in high capacity thermal power generation unit

WANG Yong;DONG Xuefeng;JIANG Dehou;REN Zhenwei

2009, 31(7): 73-75.

Asbtract ( 1477 )

Related Articles | Metrics

Electrostaticbag precipitator is novel dust removal equipment developed by combining the advantages of electrostatic precipitator and baghouse, it is especially suitable to reformation of electrostatic precipitator. Combining with a reformation project of electrostatic precipitator in domestic 660MW thermal power generation unit, the application of electrostaticbag precipitator in high capacity power generation unit was discussed.

Analysis of oilsaving method in unit startingup and shuttingdown

CHEN Tao;QIU Guangfu

2009, 31(7): 76-77.

Asbtract ( 1360 )

Related Articles | Metrics

Aiming at the present oil consumption of coalfired boiler, combining with the features of boiler devices, system and operation mode, the three period in startingup process, which have greater oilsaving potential, were analyzed emphatically, and concrete oilsaving measures were proposed. The obvious effect was obtained by adopting these measures.

Table of Content