Abstract:

With the rapid development of the electric power industry and the great changes in the power consumption structure,the utility boiler encounters many adverse factors,such as the complication of coal characteristics and the large-scale changes in the generation load,which directly affect the safety and economy of the boiler operation. The lack of the online measurement technology for the boiler units of coal-fired power plants has become one of bottleneck problems that limit the development of the optimal operation of the thermal power technology. In this paper,a new laser-spectroscopy-based technology named as LIBS ( Laser-Induced Breakdown Spectroscopy) is introduced into the boiler diagnosis of power stations,and the relevant researches implemented by the authors and their co-workers are reviewed in terms of the coal quality,the unburned carbon of fly ash,and the failure trend of heat exchange surface. Moreover,the development orientation of LIBS in the boiler diagnosis of power stations is also discussed.

Key words: boiler diagnosis of power station, laser-induced breakdown spectroscopy, coal, unburned carbon of fly ash, boiler heat exchange surface