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2016－02－01 Solution study of 1 000MW boiler side water wall high-temperature corrosion

Abstract：The problem of NOxmass concentration online measurement value deviation is very common in large-scale fire power plants.Based on caused analysis，NOxmass concentration distribution test，and analysis of instrument accuracy and measure points layout plan，improvement plan was indicated.

Keywords：NOx；measured deviation；accuracy；measuring point；improvement

WEIDaojun（Huadian Laizhou Power Plant Company Limited，Laizhou 261441，China）

Abstract：After analyzing Huadian Laizhou Power Plant Company Limited No.2 boiler water wall high-temperature corrosion causes，the plan of to provide side wind on the both side of furnace to reduce and prevent reducing atmosphere and high-temperature corrosion on side water wall was claimed.After reconstruction，cheek damper opening testwas carried out.Based the test result，the advantaged and notes of reconstruction plan were summarized.

low NOxburner；water wall；high-temperature corrosion；reducing atmosphere；side wind；hot primary air；load

2016－02－06 Boiler depth reduce flue gas temperature the influence of low-tem perature corrosion resistantmaterial

DUAN Junzhai1，ZHANG Wenpeng1，LI Zhongjiang2（1.Huadian Power International Corporation Limited Shandong Company，Ji’nan 250014，China；2.Shandong Hong’ao Power Technology Company Limited，Ji’nan 250101，China）

Abstract：In response to the call of the national energy saving，it has been important correctivemeasures formany domestic power plants to reduce boiler flue gas temperature and recycle waste heat，whereby low-temperature corrosion-resistantmaterials are put forward higher requirements.Regarding this situation，studies are conducted on several low-temperature corrosion-resistant materials.The results show that Teflon tubing and ZS-1041 anticorrosion coating are suitable low-temperature corrosion-resistant materials with good corrosion resistance.They are appropriate for power plant boiler flue gas heat recovery，which can achieve energy conservation requirements to a greater extent and improve the overall economic benefits of the plant.

Keywords：corrosion-resistantmaterial；boiler flue gas heat recovery；recycle and reuse；energy conservation

2016－02－09 Causes for corrosion and its treatment schem e of the heating surfaces in furnace of the 1000MW power p lant

SONG Kai，YUAN He，YOU Kunkun（China Huadian Zouxian Power Plant，Zoucheng 273522，China）

Abstract：Under the condition of the high temperature and high pressure，the water coolingmembrane walls are apt to corrosion and leakage on the heating surface of them.itwas the high temperature corrosion that made the pipe walls reduced，which caused the pipe wall couldn’t resist the pressure and the burst happened.The cause for the corrosion of the pipeswas analyzed in this paper.Accordingly，the combustion modes，the coal qualities and boiler improvements were improved.After the improvements above，the leakage of the membrane walls were greatly reduced.

Keywords：side wind；high temperature corrosion；water cooling membrane wall；reducing atmosphere

2016－02－11 Testing research of double D445 controlm ode for ship lift comm unication synchronization

LIU Bingfeng1，QINW enyu2（1.Huadian Zhengzhou Mechanical Design Institute Company Limited，Zhengzhou 450015，China；2.Zhengzhou Railway Bureau，Zhengzhou 450009，China）

Abstract：Ship lift for Three gorges have the characteristics of huge tonnage，high lift hight，changeable upstream and downstream，and with theworld hardest technology and biggest scale.Based on the alignmentexperiment in the ship lift plant，and the method of add a coordinator controlmodule between AB’s PLC and Siemens’s variable frequency gearing.The experimental data shows thismethod greatly enhanced synchronization performance among each suspension point.

Keywords：ship lift；communication；simulation；synchronous analysis

2016－02－14 Experimental study on 300 MW boiler slagging and high cold state fly ash in dynam ic field

WANG Chengliang，JIANG Shitao（Huadian International Technical Service Center，Ji’nan 250014，China）

Abstract：After a low-nitrogen combustion transformation on a certain meagre coal fired power plant，a few problems had come out，such as heating surface of combustion zone is slagging and highly corroded by high temperature，and the content of combustiblematter in fly ash is high.In order to control the dynamic field inside furnace，a dynamic field experiment had been conducted under a high cold state，which included three layers of powder blast ring diameter test，variable secondary air volume test and independentwind pressure and vane test.Based on the analysis of testdata，themain reason for these problems is determined basically，which brings proposed governance and operation adjustment.

Keywords：boiler slagging；dynamic field experiment；strong vane；air volume；experimental analysis；adjustment suggestion

2016－02－18 Optimum capacity test of groom ing fan for 350MW unit air preheater

CHEN Hui，HUANG Qilong，DAIW eibao，TONG Shiwei（Guodian Science and Technology Reserch Institute，Nanjing 210031，China）

Abstract：A certain air preheater of power plant is adopting a combination ofmechanical seal and grooming fan seal.Under the real operating situation，a optimum capacity test of grooming fan under190MW was conducted to test its boiler efficiency，air leakage rate of air preheater，power consumption of fan，power supply coal consumption and the costof coalatdifferent frequencies.The test shows that under 190 MW，the best frequency conversion of air preheater of grooming fan is 47Hz，which can save 48000 yuan for the unit.

Keywords：air preheater；seal；grooming fan；optimum capacity；economy

2016－02－20 Design and application of rotary trash remover of Jiuligou Hydraulic Power Plant

WANG Yanjun，YANG Jian，TANG Juanjuan，ZHANG Shaoqing，ZHANG Lubin（Qufu Hengwei Hydraulic Machinery Company Limited，Qufu 273100，China）

Abstract：Due to the blockage of trash screen of Jiuligou Hydraulic Power Plant，rotary trash remover was selected as trash removal equipment.This paper introduced the layout，structure and specifications of the rotary trash remover applied in Jiuligou Hydraulic Power Plant.After installation，flow condition was improved，unit efficiency and generation capacity were increased.The author also included treatments and improvement advises to problem of trash removers，which can be referred for similar hydraulic power plant trash remover design or improvement.

Keywords：rotary trash remover；trash screen；tooth harrow；steel support；design head；screen bar clearance

2016－02－24 The condensate polishing control system based on Citect and PLC

SUN Xiaolin1，QIN Haishan1，YIN Zhishan2（1.Huadian Zhengzhou Mechanical Design Institute Company Limited，Zhengzhou 450015，China；2.Petro China Company Limited Huabei Branch，Renqiu 062552，China）

Abstract：The condensate polishing treatment is an important measure to ensure the quality of boiler feed water in power plant.The control system was designed to ensure condensate polishing equipment safety and stable running.The system adopts Schneider Modicon Quantum PLC and PCmonitoring software Vijeo Citect to finish the whole production process of fine treatment system monitoring，production process parameters setting，accident alarm，trend analysis and report generation，and other functions.The rationality and reliability of the control system is verified by the actual operation in the field.

Keywords：condensate precision processing；PLC；Vijeo Citect；I／O

2016－02－27 Diagnostic analysis of 150 MW stream turbine thrust pad oil catch rubbing

HE Donghui，ZHAO Yizhou（State Grid Liaoning Electrical Power Supply Company Limited Electric Power Research Institute，Shenyang 110006，China）

Abstract：Based on the major accident of a 150 MW power plant’s thrust pad oil catch leakage caused fire，and serious aptitude of No.2 bearing bush while starting commissioning，the author analyzed the vibration spectrum，and indicated that the direct cause is the improper space between thrust pad oil catch and journal，and caused abrasion and fire.Based on the analysis，this paper also included the treatmentmeasures and eliminated the potential failure.

Keywords：oil catch；vibration；frequency spectrum；rubbing movement

2016－02－31 Adjustment of supports and hangers in the four primary pipelines and its piping stress analysis for a certain 330MW power unit

FAN Aibing（Jiangsu Huadian Yangzhou Power Generation Company Limited，Yangzhou 225007，China）

Abstract：This paper introduced the operation state and its fault condition of supports and hangers in the four primary pipelines for a certain No.6 power unit，and made a piping stress check for the four primary pipelines using CAESARⅡsoftware.According to the results of stress calculation and on-site inspection，this paper proposed a scientific and reasonable adjustment scheme and put it into practice.After that，some suggestions were put forward for the operation supervision of supports and hangers.

Keywords：power plant；supports and hangers；pipelines；fault；stress check；CAESARⅡsoftware；adjustment

2016－02－35 On line replacement of valve servo valve and the analysis of the servo valve jam of 600 MW steam turbine

ZHANG Xuehai（Huaneng Tongchuan Zhaojin Power Plant，Tongchuan 727000，China）

Abstract：As for the jam fault of the servo valve of the 600MW steam turbine，three online replacements scheme were put forward.compared with each other，the minimum risk scheme was selected ultimately.The measures were taken at the time of changing themedium pressure servo valve.At the same time，the reasons for the servo valve jam were analyzed，and the relevant measures were put forward.

Keywords：medium pressure regulating valve；servo valve；online replacement；reason analysis；reform measures

2016－02－39 Cause analysis of a high voltage motor bearing damage accident

MA Yonghui，ZOU Xingguang（Shanxi Huadian Yaochi Power Plant Company Limited，Binxian 713500，China）

Abstract：Based on the analysis of boiler secondary air fanmotor bearing damage accident，accident cause was determined as shaft current generated by motor.This paper analyzed the cause of shaft current and the damage of bearing.After change the non-driving end shield to isolated shield，hidden danger was eliminated.

Keywords：motor；shaft voltage；shaft current；isolation

2016－02－41 Optim ization of feedwater control system for 1050MW ultra-supercritical power unit

WU Ludong，ZHANG Xiaodong（Huadian Laizhou Power Generation Company Limited，Laizhou 261400，China）

Abstract：In order to improve the automatic control level，some feedwater control strategy optimizationmeasureswere adopted for the 1050MW ultra-supercritical power unit of Huadian LaizhouPower Generation Company Limited，such as changing the feedwater control strategy to coal-dominated strategy，controlling the coal-water ratio by adjusting the fuel and water supply，adding superheat control circuit，and adding boiler combustion simulation circuit for feedwater flow setpoint，etc.After the feedwater control strategy optimization，the result of steady load test shows that the operating indicators ofimportantparameters related to the power unitare qualified，which improves the quality of coordination control and contributes to the energy-saving and cost-reducing.

Keywords：ultra-supercritical power unit；feedwater control system；coal-water ratio；degree of superheat；water supply flow

2016－02－44 DCS reconstruction of boiler side sequence control and logic optim ization

ZHAO Na1，ZHANG Zhenwei2（1.Tianjin Huaneng Yangliuqing Thermoelectric Company Limited，Tianjin 300380，China；2.Xi’an Thermal Power Research Institute Company Limited，Xi’an 710032，China）

Abstract：This paper describes the Tianjin Huaneng Yangliuqing thermoelectric Corporation Limited.three No.5 unit dispersed control system（DCS）transformation of the latter，debugging process，The boiler side sequence control logic system（SCS）to optimize the process.（this paper）To early to SCS in different stages of the design，configuration and debugging of the main problems are analyzed，and in view of the defects of the original design logic proposed the solution.After optimization of SCS runs smoothly，the interlock protection action of unit ismore accurate and reliable.

Keywords：DCS；reconstruction；sequence control；logic optimization

2016－02－48 Cause analysis and treatment of 1000MW ultra-supercritical boiler water wall leakage

DONG Hongnian（Guangdong Datang International Chaozhou Power Company Limited，Chaozhou 515723，China）

Abstract：From the structure，design，piping，performance，operation and other aspects，this paper analyzed a power plant’s boiler frontwallwater wall leakage accident.And indicated that themain causes of this accident are water wall abnormal expansion，improper welding process，water wall over pressure due to structure design and thermal stress while operation.This paper also included treatmentmeasures.

Keywords：ultra-supercritical boiler；front wall water wall；expansion；thermal stress

2016－02－53 Tetralogy of management mode and app lication of precise point detection

CAO Jingfang（China Huadian Zouxian Power Plant，Zoucheng273522，China）

Abstract：Precise point detection is a technological base of power plant conducting point inspection and regular repair management.This paper introduces a tetralogy ofmanagement by periodic detection，signs warning，abnormal tracking and improvement and promotion，which could effectively accelerate lean management of precise point detection，maximum its function and increase the reliability of equipment.

Keywords：precise point detection；periodic detection；signs warning；abnormal tracking；improvement and promotion

2016－02－55 On-load test of common electrical equipment

HE Liping1，LI Chunliang1，HUANG Zuwei1，CAI Zhaoyu1，ZHOU Zhiqin2，YIN Hao2（1.Guangdong Power Gird Company Limited Jieyang Power Supply Administration，Jieyang 522000，China；2.Guangdong Industrial University College of Automation，Guangzhou 510006，China）

Abstract：To guarantee the stability and operation safety of power grid，on-load test of new equipment shall be carried outbefore put into operation.After test on capacitor，electric reactor，cable and transformer，angle-of-attack charter of voltage，current and load flow valuewas drafted.After analyzing test results，the causes of change of current，voltage and phase was indicated.

Keywords：on-load test；angle-of-attack method；electrical equipment；voltage transformer；current transformer

2016－02－59 Analysis of high tem perature resistance and shaft current reconstruction of bearings for large AC m otor

CHEN Yonglong（Huadian Power International Corporation Limited Shaoguan Pingshi Power Generation Company Limited，Shaoguan 512229，China）

Abstract：There often happened the high temperature，abnormal sound and the damage in the large ACmotor shaftduring the operation，which affected the normal operation of the power unit.The causes for the hidden dangers were analyzed and themeasures that prevented the shaft from the high temperature and the axis current formation were taken.The results showed that these reform measures achieved a good effect in the practical application.

Keywords：axis current；film；sischarge；transform

2016－02－61 MS9001E gas turbine hydraulic oil system optim ization

XIANG Jianwei（Zhejiang Zhenhai Power Generation Company Limited，Ningbo 315208，China）

Abstract：This paper introduces the composition and function of MS9001E gas turbine oil system，in order to improve the quality of hydraulic oil，The original hydraulic oil system is transformedinto an independentunit.Discusses the reform scheme，analyzes the transformation effect，believe that the transformation of the hydraulic oil system can ensure the safe and reliable operation of the unit.

Keywords：gas turbine；lubricating oil system；hydraulic oil；optimization

2016－02－63 Full automatic processing scheme for recirculating cooling water of coal-fired power p lant

ZHANG Zhiguo，LAN M eng（Technology＆Information Center of SPIC Henan Electric Power Company Limited，Zhengzhou 450001，China）

Abstract：For the problems that existed in the conventional circulating cooling water treatment technology of coal-fired power plant，such as poor dosing accuracy，delayed water quality analysis and monitoring，and unstable concentration ratio，etc.This paper proposed a full automatic processing scheme for recirculating cooling water，which could realize theauto-additionof antiscale corrosion inhibitor and bactericide，auto-control ofthe cooling waterblowdown，online monitoring of the pH，corrosion rateofmetal，turbidity，fouling resistance，fouling deposition rate，adding quantity ofwater and drugs，etc.In addition，the scheme also could make a predictionbefore problem occurs and dealwith the problem in time.In short，the realization of full automatic process of recirculating cooling water improves the operation security of recirculating coolingwater system，saveswater，reducesoperation costsand promotes operation management efficiency.

Keywords：recirculating cooling water；automation control；concentration ratio；fouling resistance

2016－02－65 Researches on the technology of the flue-gas ultra clean em ission of the coal-fired p lant

DENG Huipeng（China Huadian Engineering Company Limited，Beijing 100073，China）

Abstract：with the more and more strictly requirements for the discharge of the pollutants，the coal-fired plants were carrying out a large scale flue-gas ultra clean emission actions.At present，therewere threemainly current streamline emission technology schemes.In this paper，the 3 schemes were expounded respectively and their characteristicswere analyzed，which provided the references for selection of the technology to the flue-gas ultra clean emissions.

Keywords：wet flue-gas desulfurization；ultra clean emission； desulfurization process flow；series connection absorption tower；twin towers double cycle；wet electrical dust precipitator

2016－02－68 App lication of transformation technology of gapacity increase of single tower for desulfuration of 600MW high-sulphur coal unit

ZHOU Qiang，XIAO Guilin（Sichuan Guang’an Power Company Limited，Guang’an 638017，China）

Abstract：Take capacity expansion reformation of flue gas desulphurization system of a certain 600MW unitas an example，this paper introduces comparison and selection of capacity expansion reformation of desulphurization in the high-sulphur district in order to adapt to the change of sulfur content rate in coal and national emissions requirements.This paper also analysis the implementation of the original desulphurization system，which brings reference value to similar plant transformation.

Keywords：600MW unit；high-sulphur coal；single tower desulphurization；capacity expansion

2016－02－72 The influence of haze on the compressor inlet filter life

LIU Jinliang，LIU Zhihui（Beijing Jingqiao Thermal Power Company Limited，Beijing 100067，China）

Abstract：The haze weather is one kind of air pollution，especially PM2.5 was found to be the culprit behind the haze.The micro particles block the inlet air filtering system of gas turbine compressor，the inletair filtering system pressure increased，the unit efficiency decreased，and even threat to the safe operation of the unit.In order to find out the influence of haze on the compressor inlet filter life，through analyzing data to find out a set of theory tomonitor the compressor inlet filter life.

Keywords：gas turbine；inlet air filter；the haze weather；PM2.5

2016－02－74 Cause analysis of deviation of online NOxmass concentration measurement for large-scale thermal power p lant

SHU M aolong（Shenhua Guoneng Ningxia Coal and Power Company Limited，Yinchuan 750410，China）