Integrated Intelligent Energy

Optimized design of ammonia injection grid of flue gas deNOx equipment

CHEN Peng;HU Yongfeng

2012, 34(10): 1-6.

Asbtract ( 881 )

Related Articles | Metrics

Taking the 2×660MW ultra supercritical unit reconstruction project of a power plant as example, the general situation of the ammonia injection grid of the SCR deNOx project, which contains square tooth type rub preventing mixing plate and has low resistance, was introduced. The features and idea of the optimized design of the ammonia injection grid were expounded. The test verification and the application result in practical project show that the ammonia injection grid can satisfy the requirements of ammonia injection and mixing in deNOx projects.

Analysis on deNOx system performance test in thermal power plant

YANG Qingshan;TAN Jiankun

2012, 34(10): 7-8.

Asbtract ( 665 )

Related Articles | Metrics

The measuring iterms and measuring methods used in conventional checking test of deNOx system performance were introduced. Based on this, aiming at the test method of amonia escape and SO3 sampling, the error may existing in test process and the influence of the error were analyzed. It was expected that the analysis is helpful to enhence the scientificalness of the deNOx system test in power plants.

Experimental analysis on low NOx combustion regulation of boiler

YAN Weiming;SONG Guosheng;SONG Xiaohong;HOU Haiping

2012, 34(10): 9-11.

Asbtract ( 682 )

Related Articles | Metrics

For different combustion conditions, the pollutant emission characteristics under various conditions were obtained by carring out the test and regulation respectively and using the online monitoring technology. According to the results of experimental analysis, the law of NOx emission of the boiler was summarized, which provides reference for flue gas denitration reformation.

Fire fighting design for liquid ammonia tank area of flue gas deNOx project in thermal power plant

ZHANG Jing

2012, 34(10): 12-13.

Asbtract ( 790 )

Related Articles | Metrics

The design standard of water mist spray fire extinguishing system for liquid ammonia tank area of flue gas deNOx project of thermal power plant was analyzed. It is suggested to determine the relative values clearly in the revision of the file ‘ Code for design of fire protection for fossil fuel power plants and substations ’. After the ammonia tank was added in a power plant, some new problems may be occurred in fire extinguishing water supply and drainage system, to which must pay enough attention in practical project.

Development and application of online monitoring device of flying ash carbon content

WANG Jianfeng;LI Shuo;LU Ye;WANG Zhijun;WANG Meng’an

2012, 34(10): 14-17.

Asbtract ( 613 )

Related Articles | Metrics

China; 3.Dalad Power Plant of North United Power Corporation, Ordos 014300, China; 4.Baotou Donghua Thermal Power Company Limited, Baotou 014040, China)
Online monitoring of flying ash carbon content is of important significance for the unit operation and the boiler combustion regulation of a power plant. In the developed flying ash carbon content online monitoring device, a series of technical methods was adopted, which includes the sampling in constant speed, the microwave attenuation method measurement, the purging by pressed air, the ash removal by vibration, the pneumatic ash discharge, the automatic control and so on. The working principle of the device and the structure features of its main components were expounded emphatically and the field application was introduced.

Comparative study on properties of NiCrTi series hightemperature antisulphur corrosion spray painting materials 45CT and PS45

XIAO Hongbo;QIU Zhibin;XIE Mingjun;ZHAO Xinghua

2012, 34(10): 18-20.

Asbtract ( 674 )

Related Articles | Metrics

The main performance indexes of the NiCrTi antisulphur corrosion spray painting materials 45CT and PS45 were tested and analyzed. The results show that the chemical compositions of 45CT and PS45 are alike, and the microstructure morphologies of the coatings prepared by 45CT and PS45 are similar. The corrosion weight gain experiment was carried out for the two coatings; and the dense Cr2O3 and Cr2NiO4 structure was formed on the corroded coating surface, which has excellent hightemperature sulphur corrosion resistant capability.

Study and application of green design evaluation method for hydraulic machinery based on AHP

TAO Shaoxiong

2012, 34(10): 21-24.

Asbtract ( 590 )

Related Articles | Metrics

Taking the hydraulic machinery as research object, the main factors influencing on the hydraulic machinery green design evaluation were analyzed and summed up,and an evaluation index system was built. Based on this, a hydraulic machinery green design evaluation and decision model based on AHP was established. At last, the practical applicability of the model was verified by practical examples.

Monitoring design for chemical auxiliary machines by sound and light alarm system

JIANG Yong;XUE Lian

2012, 34(10): 25-27.

Asbtract ( 663 )

Related Articles | Metrics

The voice alarm system is not installed in upper computer of PLC of Sichuan Guang’an Power Generation Company Limited. Due to that there are much

posts and operation screens but there are little operators, some acid leakage and alkali leakage faults can not be found timely. By using of excel software,

a sound and light alarm system for the chemical auxiliary machines was produced. Then one operator can keep watch on own post and others posts and can give

alarms, and the operation reliability was increased.

Solving process of exact state equation for catenary

LIN Shipao;KE Yongjun

2012, 34(10): 28-30.

Asbtract ( 732 )

Related Articles | Metrics

Although there are many forms of the state equation for the overhead wire and their solving processes in present design work, they are all

simplified based on the parabola. Certain error will occur in design calculation based on these forms of state equation; especially, the error will be more

obvious under the conditions of large altitude difference, large span and large windage yaw. The exact state equation for the catenary is transcendental

equation including hyperbolic function. Using the Newton iteration method, the solution of the equation was found. In the solving process, the exact state

equation for the catenary with conditions of large altitude difference, large span and large windage yaw was adopted, and the result verification method was

given.


Reason analysis on stalling of axial flow primary air fan of large boiler and treatment measures

ZHENG Guokuan;LI Cuicui

2012, 34(10): 31-33.

Asbtract ( 1254 )

Related Articles | Metrics

In operation of the 600MW boiler of a power plant, the stalling accident of the primary air fan occurred two times continuously. According to

analysis, the main reasons of the primary air fan stalling are that the thermal control logic of the mill is irrational, the calculation of the air coal

ratio is irrational, the coordination logic of the unit is irrational and so on. The preventive measures and treatment method of stalling of the axial flow

primary air fan were proposed. Some technical measures, such as to reform the fan and the pipes layout, to arrange the coal blending of the mill rationally

and to decrease the load adjustment speed of AGC properly, were discussed.

Analysis on reasons of jam fault of hot primary air valve in 600MW coalfired boiler and countermeasures

ZHANG Zhenke;JI Guanghui;WANG Ying;YUAN Liqiang;LIU Wei

2012, 34(10): 34-36.

Asbtract ( 682 )

Related Articles | Metrics

The reasons of the jam fault of the hot primary air valve in the 600MW coalfired boiler were analyzed combining with practical example. The

method to solve the jam fault of the hot primary air valve was put forward. A series of treatment measures was adopted for the air valve， and good effect

was obtained. The requirement of opening adjustment of the hot primary air valve in higher frequency and in long time was satisfied，and the safety and

reliability of the equipment operation were improved.

Application of Heller air cooling system and matters needing attention

QIAO Gangjie

2012, 34(10): 37-38.

Asbtract ( 658 )

Related Articles | Metrics

The Heller air cooling system was debugged. Based on this，the matters needing attention in system debugging and operation were analyzed and

summarized. The relevant measures were adopted, the debugging period had been shortened, and the equipment damage accident in debugging and operation

processes was avoided.


Reformation of flow passage of 300MW domestic impulse steam turbine

ZENG Rongpeng

2012, 34(10): 39-42.

Asbtract ( 604 )

Related Articles | Metrics

The early domestic 300MW impulse steam turbine has poor economical efficiency and hidden safety troubles; so it is necessary to reform its flow

passage to overcome its defects. Using the threedimensional thermal design technology, the flow passage of the turbine in a power plant was reformed. After

the reformation, the heat consumption, the safety function and other indexes of the unit achieve or close to the designed value. The result of this paper

provides reference for reformation of flow passage of similar units.

Checking of thermodynamic process of steam soot blower and analysis on impact of steam parameters

JING Jie;WANG Weilin;LIU Wenping;DONG Shigang

2012, 34(10): 43-45.

Asbtract ( 641 )

Related Articles | Metrics

Combining with the requirement of operation regulation of the power plant, the steam thermodynamic process parameters of the air preheater soot

blower of the 300MW boiler in Shanxi Zhangshan Power Generation Company Limited were compared and analyzed， and some feasible operation control measures

were adopted.

Analysis on influence of voltage frequency on compositevoltage memory overcurrent protection

BAO Minglei;LIU Xiaobo;LIU Wanbin

2012, 34(10): 46-48.

Asbtract ( 651 )

Related Articles | Metrics

Aiming at the action situation of the compositevoltage memory overcurrent protection of the selfshunt excitation generator set with medium or

small capacity during the power system load rejection caused by remote fault, the influence of the variation of the voltage frequency on the composite

voltage memory overcurrent protection was analyzed. The principles of sampled value emendation and the voltage tracking overcurrent protection were

introduced, and relevant solution was proposed.

Problems of condenser rubber ball cleaning device occurred after pole changing reformation of circulating water pump and countermeasures

XIAO Chengming

2012, 34(10): 49-51.

Asbtract ( 775 )

Related Articles | Metrics

In the Guodian Huangjinbu Power Generation Company Limited, after the circulating water pump motor had been reformed by pole changing method, when

the lowspeed circulating water pump operates, the rubber ball recovery rate of the condenser rubber ball cleaning device was very low (below 50%). The

reason of low ball recovery rate was analyzed. At present，by improving the condition for putting the rubber ball cleaning device into operation, the rubber

ball recovery rate achieves above 95% when the lowspeed circulating pump operates, which can satisfy the requirement of the condenser cleaning.


Analysis on reason of short operation cycle of mixed bed for condensed water fine treatment

GENG Weizhong;HAO Xiangjun

2012, 34(10): 52-54.

Asbtract ( 791 )

Related Articles | Metrics

Some problems, such as the short operation cycle, the small amount of the prepared water, the frequent regeneration of the resin and others, existed

in the mixed bed for condensed water fine treatment of the 2×600MW direct air cooled unit of the Shanxi Xingneng Power Generation Company Limited project

phase II. The reasons of the problems were found from several aspects, which include the quality of the mixed bed input water, the purity of the regenerating

agent, the amount of the ammonia added into the feed water and the conveying of the exhausted resin. The improvement measures were proposed, and the practice

shows that the effects of the measures are favorable.

Analysis on reason of rapid dropping of condensate pump output power and countermeasures

HONG Li

2012, 34(10): 55-56.

Asbtract ( 819 )

Related Articles | Metrics

The problem of the condensate pump output power rapidly dropping repeatedly ocuurred in the debugging process of the 1000MW unit in Huilai Power

Plant was analyzed. The basic reason of above problem was found，and the practical feasible treatment method and preventive measures were put forward.

Analysis on technical characteristics of full capacity feed pump driving turbine and energy conservation effect

LIU Junfeng;FAN Yunxiu

2012, 34(10): 57-59.

Asbtract ( 650 )

Related Articles | Metrics

The technical characteristics of the full capacity feed pump driving turbine of Huaneng Dongfang Power Plant were analyzed. Based on the energy

value analysis method, the energy conservation effects of the starting modes of the turbine driven feed pump and the electrical feed pump were calculated and

compared. The problems of the feed pump driving turbine occurred during commissioning were discussed, and feasible solution was given.

Fine operation of load rejection test of 300MW unit

WANG Zhiqiang;HE Cheng

2012, 34(10): 60-63.

Asbtract ( 662 )

Related Articles | Metrics

The load rejection test is a dynamic characteristics test for the steam turbine governing system to check whether the dynamic characteristics of the

turbine governing system can satisfy the requirement of unit safe and stable operation. In order to enhance the success rate of the test, before the test,

the necessary analysis, calculation and preliminary test for the key operations influencing on the test result were carried out to insure the operation of

load rejection to be correct and timely. For the large amount of operations in short time, the operation instruction cards were compiled for every operator

station.The operation was resolved into fine steps,the amount of operation of each operator station was reduced, and the pertinence of each operation step

was increased.

Analysis on reason of fault of fireresistant oil filter

WANG Hui

2012, 34(10): 64-65.

Asbtract ( 678 )

Related Articles | Metrics

The working principle of the vacuum oil filter was introduced. The reason of frequent fault of vacuum fireresistant oil filter in Guangdong Datang

International Chaozhou Power Generation Company Limited was analyzed.The main reason of the oil filter fault was determined that the lower temperature of the

fireresistant oil, which causes the viscosity of the fireresistant oil to increase. The viscositytemperature characteristics of the fireresistant oil

can influence on the system equipments more greatly，and the operators must adjust the oil temperature in accordance with the site environmental temperature

to ensure the system equipments to operate in best working state.

Optimal dispatching of cascade hydropower stations and energy conservation and emission reduction

LI Zehong

2012, 34(10): 66-68.

Asbtract ( 679 )

Related Articles | Metrics

To increase the share of the hydroelectric power in total energy supply is important way to perform the promise of our government to international

society about energy conservation and emission reduction. By the optimized dispatch of the basin cascade hydropower stations, the generated electricity of

these hydropower stations can increase considerably, which is equivalent to that to build some large or medium-size hydropower stations without needs to

increase the investment and to migrate the residents. These measures are of important significance for increasing the consumption proportion of non-fossil

energy and decreasing the atmospheric pollutant emission.

Analysis on reasons of higher outlet gas temperature of boiler and optimization treatment

DU Chengde

2012, 34(10): 69-72.

Asbtract ( 849 )

Related Articles | Metrics

The outlet gas temperature of boiler No.3 of Zouxian Power Plant was too high, which influenced on the economic efficiency of the unit greatly and

led to that the unit can not meet the current requirements of lowering energy consumption. Combing with the actual equipment, the reasons of the higher

outlet gas temperature of the boiler were analyzed, and the optimization scheme was formulated. After the optimization scheme had been implemented, the

outlet gas temperature of the boiler reduced. The result of this paper provides experience for energysaving optimization of similar units.


Successful experience of US in shale gas development and revelation for China

YANG Shumei;ZHANG Lili

2012, 34(10): 73-76.

Asbtract ( 632 )

Related Articles | Metrics

The shale gas is a natural gas existing in various phase states and concentrating in shale formation with lower porosity; it is an unconventional

natural gas resource and becomes focus area of unconventional oil and gas resource exploration and development in entire world. The US obtains great success

in shale gas development and provides good demonstration for other counties to develop their shale gas industry. The shale gas industry of our country is

still at beginning stage and faces with impediments in the geologic information, the technology, the base installation, the police system and other aspects.

The successful experiences of US in development of shale gas industry were analyzed systematically.Some targeted suggestions were put forward for

accelerating the development of domestic shale gas industry and increasing the natural gas production combining with domestic practice.


Table of Content