Author(s)

Xiaoyan Zhang

Corresponding Author

Xiaoyan Zhang

Abstract

It is difficult to improve the efficiency of CFB boiler burning anthracite. The main reason is that the primary loss rate of anthracite fuel is low. Circulating fluidized bed boiler has been widely popularized at home and abroad because of its great advantages such as strong adaptability of coal and good environmental protection characteristics, and it is developing towards large scale. Why the efficiency of CFB burning anthracite is not improved has not been explained fundamentally. The combustion technology of circulating fluidized bed boilers has been rapidly developed by virtue of its own advantages. It has become the best commercialized combustion technology at present, and is moving toward supercritical and large-scale. Due to the large proportion of inferior coal such as stone coal and high-sulfur anthracite in China's coal resources, the coal source of each power plant is variable and the coal quality is unstable. Based on the analysis of the direction of the generation mechanism, this paper further discusses the application of fly ash backfire technology in circulating fluidized bed thermal boiler.

Keywords

Circulating Fluidized Bed, Boilers, Fly Ash Reburning Technology