Distribution Law and Transfer Mechnism of Mercury during Combustion of Pulverized Coals
Emission and control of mercury from coal combustion is an emerging and frontier area and going to attract more attention in future. During combustion of pulverized coals, most of the Hg volatilizes. Variable amounts of Hg are captured by fly ash and essentially none accumulates in the bottom ash. Hg is emitted to the atmosphere as gaseous (dominate) and solid-phase (subordinate) pollutants. In this paper, a summary of the status of research related to mercury speciation and progress in the development of promising control technologies for coal-fired power plants are provided. Fly ashes have been sampled from the electrostatic precipitator (ESP) of three power plants. The concentration of mercury in these samples and the particle size distribution of the fly ash were determined. Results indicate that the mercury concentration in fly ash is increase with the particle size fining. And mercury partitioning in emission streams, enrichment in submicron particles vaporization and emission in flue gas, and the mobility and leaching behavior of mercury in coal and combustion waste are summarized.
mercury fly ash Coal combustion
Qi Liqiang Yuan Yongtao
School of Environmental Science and Engineering, North China Electric Power University Baoding, China 071003
国际会议
上海
英文
4667-4668
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）