Integrated Intelligent Energy

The Important Way for Energy Saving of Fan and Pump

WANG Zhen-yu

2008, 30(7): 1-5.

Asbtract ( 4117 )

Related Articles | Metrics

The correct selection and use of fan and pump are the important prerequisite for raising their efficiency. Taking fan as the example the similar operation relations of fan and pump are explained, the essential conditions which must be satisfied for similarity of fan and pump were proposed, and the inevitable results of the similarity were given. The variable frequency speed regulation has become the first scheme to be selected. According to the similarity law of fan and pump, in the process of reducing speed, the efficiency of the fan and pump will be kept at the same value, and its flow rate, pressure(or delivery head) and power are reduced in proportion to speed, speed square and speed cube respectively.

The First Home-made 670t/h CFB Boiler and Its Operation Experience

PENG Xiao-zheng;CHEN Nian-zu;CHENG Wen-feng

2008, 30(7): 6-8.

Asbtract ( 4011 )

Related Articles | Metrics

The problems revealed during erection, trial operation and trial production of the first home-made CFB boiler were introduced. The adoption of successful experience, the improvement of fluidized bed heat exchanger (FBHE), the measures for prevention of explosive combustion and furnace clinkering were expounded in detail, and the useful practical experience for construction of 1025t/h CFB boiler and other CFB boilers was afforded.

The Reason Analysis on Hydrogen Purity Lowering of Double-ring Oil Sealing Generator

HU Xiao-hui

2008, 30(7): 14-16.

Asbtract ( 3967 )

Related Articles | Metrics

The quantity of make-up hydrogen is an important operation index of generator unit, too large quantity of hydrogen often appears in the double-ring oil sealing generator .By the analysis of the oil sealing system and the sealing bush construction, the problems and hidden troubles existing in system design and operation were treated and regulated, the speed of hydrogen purity lowering was controlled, the hydrogen exchange quantity of generator and the hydrogen consumption were reduced, so the purpose of energy-saving and consumption-reducing was achieved at last.

The Research of Monitoring Wave Recording Analyzing Diagnostic System

DING Jun-jian

2008, 30(7): 17-20.

Asbtract ( 2601 )

Related Articles | Metrics

The meanings of monitoring wave recording analyzing system for large-scale unit were expounded. Aiming at the current situation of unit wave recording in China and abroad, the software and hardware flames of distributed monitoring wave recording analyzing system based on assembly CPU design were put forward. Some key technical problems on data synchronization, start-up, data storage, communication, sensor design, failure diagnostic, unit test, etc. were analyzed, and the relevant solution plans were put forward.

Type Selection Analysis for the Boiler Equipments of 1000 MW Ultra-supercritical Unit

JING Xu-cheng;JIANG Jian-she

2008, 30(7): 21-23.

Asbtract ( 2642 )

Related Articles | Metrics

The 1000 MW ultra-supercritical boiler of Zouxian Power Plant is one of the first localized demonstration projects for imported technology of 1000 MW units, there was no ready-made mode for reference in equipment- type selection. Combining the unit operation, the analysis on the unit capacity, coal grade, combustion mode and heating surface material were done, and several main problems needing attention in boiler equipments type selection were put forward in this article.

The Welding and Heat Treatment of Novel Heat-resisting Steel

FAN Chang-xin;ZHOU Rong-can;YAO Bing-yin;SHAO Tian-you; TANG Li-ying;WANG Hong-zhe;ZHANG SHU-xia

2008, 30(7): 24-27.

Asbtract ( 3740 )

Related Articles | Metrics

Take welding and heat treatment of the P92 steel of main steam pipe in Huaneng Yuhuan Power Plant as the example, the solutions of technical problems in novel material welding were introduced. Aiming at the problems existing in welding and heat treatment field in China, some effective measures were employed to control the installation quality. It is expected that the measures mentioned in this paper can be used as reference for welding quality control in construction of other ultra-supercritical units.

Discussion on the Theory and Practice of Pool Purchase Price (PPP) Mechanism

ZHANG Yu

2008, 30(7): 28-31.

Asbtract ( 1566 )

Related Articles | Metrics

This paper briefly describes the theory and pricing methods of Pool Purchase Price (PPP) mainly adopted, and summaries China PPP management mechanism reform since 1985. The detailed analysis on China′s current PPP mechanism, combined with theory and practical situation, was made, and finally given the conclusions as following: The current unique system electricity price mechanism is not suitable for the dispatching requirements of energy saving, while double-part electricity price mechanism with certain assistance service compensations has more advantages.

The Technical Consideration on Constructing Chinese digitization Power Plants

ZHANG Su-hua

2008, 30(7): 32-36.

Asbtract ( 2934 )

Related Articles | Metrics

Aiming at the design of digitization power plant, the concept, background and significance were discussed. Four kinds of mode for digitization power plant were introduced, and one mode based on the DCS system is available relatively. The core technique for realization of digitization power plant was analyzed in detail, and it was pointed that the development of digitization power plant technique should be adapted to the new situation of green electric power.

The Research and Development on Injection Scheme for Stator Ground Protection of 1000 MW Generator

LIU Xiao-bo;BAO Ming-lei

2008, 30(7): 37-41.

Asbtract ( 2561 )

Related Articles | Metrics

The higher requirements of relay protection for large generator unit have been put forward along with the increment of unit capacity. In this paper the requirements for 1000MW unit relay protection, especially for the generator stator ground protection, were expounded, the conventional stator ground protection of external source injection mode was introduced, and the deficiencies in its application were analyzed. A complete microcomputer protection scheme of stator ground fault based on the balance principle was proposed as an improvement of above protection mode. In the scheme, the influence to protection of external source fault, PT leader breakdown, system harmonic etc. were considered, so the protection device can distinguish reliably the generator stator ground failure.

The Reason Analysis of Boiler Clinkering and Countermeasures

CHEN Tao;QIU Guang-fu;TAN Guang-wei

2008, 30(7): 42-45.

Asbtract ( 3773 )

Related Articles | Metrics

Aiming at the serious clinkering problem of #11 boiler in Dafang Generation Co., Ltd., the concrete reasons of boiler clinkering were analyzed systematically combining with the features of the boiler equipments, system and operation. Based on a large number of experiments, analyzing and summarizing, a series of feasible measures for solving the problem of boiler clinkering were proposed, and after adopting those measures in practice the problem of boiler clinkering has been controlled basically.

The Economic Analysis of Circulating Water Main pipe System Operation

FENG Liang

2008, 30(7): 46-48.

Asbtract ( 1819 )

Related Articles | Metrics

The main pipe system is adopted in circulating water system by Mawan General Power Plant. In summer it can satisfy the requirement for the circulating water of two units with full load when three water circulating pumps operate, and it makes obvious economic benefit. In this paper its regulation process was introduced, and the economic benefit getting from adoption of the regulation was analyzed, the conclusions which the operation mode is economic and feasible were obtained.

Lubricating Oil System Reformation of Main Equipments in Power Plant

YIN Chun-hong

2008, 30(7): 49-51.

Asbtract ( 2644 )

Related Articles | Metrics

The low oil pressure of the main equipment lubricating oil system in Wangting Power Plant during start up and operation was introduced. Aiming this problem, the reformation of the main equipment lubricating oil system was carried out, and the reformation process was described in this paper. The problem of low lubricating oil pressure in the same type unit can be solved using the same measures.

Analysis and Countermeasures on Abnormal Temperature Difference of a 600MW Turbo-generator’s Stator Winding Bar effluent Coolant

HUANG Zi-bo

2008, 30(7): 52-53.

Asbtract ( 2449 )

Related Articles | Metrics

Based on the phenomenon of abnormal temperature difference of the effluent coolant of 600MW generator’s stator wingding bar in a power plant during operation, this paper provided a comprehensive analysis for its causes, outlined the solution process, and proposed the treatment countermeasures for abnormal temperature difference of effluent coolant.

The Analysis on Booster Fan Selection of Wet FGD Process

DUAN Cheng-jie;KONG Lin

2008, 30(7): 54-57.

Asbtract ( 2131 )

Related Articles | Metrics

The booster fan is important device for performance and reliability of desulfurization system, its type selection has greater influence on the overall cost and performance optimization of desulfurization system. The economic and technical comparison between axial-fan with adjustable moving vanes and axial-fan with adjustable static vanes were given from the aspects of performance parameters, power consumption, maintenance and cost. The conclusion of this research can be used as a reference for booster fan selection of FGD engineering.

Study and Analysis on Automatic Control System of 1000MW Ultra-supercritical Unit

ZHANG Chuan-sheng

2008, 30(7): 58-63.

Asbtract ( 3068 )

Related Articles | Metrics

The modulating control, boiler ignition control, sequence control and data acquisition system of distribution control system (DCS) were introduced. The features of turbine control, turbine protection, boiler feed-pump turbine control and PLC control were analyzed. The application of the plant level supervisory information system (SIS) and the plant level management information system (MIS) were expounded in detail. These can be used as reference for automatic control system design of the same units.

The Whole Processes Feedwater Control Tactics of Domestic 600MW Supercritical Unit

LIANG Fu-yu;ZHUANG Jian-hua

2008, 30(7): 64-67.

Asbtract ( 2903 )

Related Articles | Metrics

Focusing on the whole processes feedwater system of Guohua Taicang Power Plant, this paper analyzed the feedwater control system in detail, and proposed the control tactics for realizing whole processes feedwater control system. The relevant operation parameters and operation curves which obtained after the control system put into operation were introduced for a reference.

The Energy-saving Reformation of Electro-static Precipitator Power Supply

ZHU Qi

2008, 30(7): 68-70.

Asbtract ( 3657 )

Related Articles | Metrics

Aiming at the shortcoming existing in the electro-static precipitator power supply and its control device of Wangting Power Plant unit #11, which includes the larger energy consumption, the backward control mode, the frequently occurring of communication accident, etc., the reformation measures were proposed. The economic analysis by the comparison of energy consumption before and after reformation shows that the energy-saving goal is realized perfectly.

The Analysis on Reverse Osmosis Membrane Pollution and Cleaning Technology

SU Chang-jian;ZOU Wei-he

2008, 30(7): 71-74.

Asbtract ( 1895 )

Related Articles | Metrics

The reverse osmosis membrane is applied widely in pure water production process due to its excellent performance of steady production, low operation cost, non-pollution to environment etc. The reverse osmosis membrane may be polluted itself by suspended particles and indissoluble matters in normal operation, and this will lower the performance of reverse osmosis membrane, therefore cleaning membrane is very important. By analyzing the membrane pollution of reverse osmosis system in Huadian International Co., Ltd., Shiliquan Power Plant, a set of feasible membrane cleaning technology , including the prescription and process, was developed, which may offer the same pure water production process as a reference.

The Calculation Method on CL/CD of the Wind-mill Generator Aerofoil

MA Peng;FENG Jia-hui;HU Chang-yang

2008, 30(7): 75-79.

Asbtract ( 4420 )

Related Articles | Metrics

This article simulated and analyzed the behavior of wind-mill generator aerofoil in the wind field by using of the physics environment method in the fluid- solid coupling module of the large finite element analysis software-ANSYS, and a calculation method on cL/cD of the airfoil was found through many attempts and selection, the method can give a result which relatively approaches the real value.

Table of Content