MERCURY SPECIATION AND EMISSION FROM FIVE COAL-FIRED POWER PLANTS IN CHINA
This paper reported mercury speciation and emission from five coal-power stations in China. The standard Ontario Hydro Method (OHM) was used into the flue gas mercury sampling before and after fabric filter (FF)/ electrostatic precipitator (ESP) locations in these coal-fired power stations, and then various mercury speciation, Hg0, Hg2+ and HgP in flue gas, were analyzed by using EPA method. The solid sample, such as coal, bottom ash and ESP ash, were analyzed by DMA 80, based on EPA Method 7473. Through analysis, it could draw out: (1) the mercury speciation varied greatly when flue gas going through FF/ESP. Of the total mercury in flue gas, the proportion of Hg2+ ranged from 4.87％～50.93％ before ESP and 2.02％～75.55％ after ESP, while that of the Hg0 was in the range of 13.81％～94.79％ before ESP and 15.69％～98％ after ESP, as well as that of the HgP was in 0％～45.13％ before ESP and 0％～11.03％ after ESP. (2) The mercury in flue gas mainly existed in the form of Hg0 and Hg2+.(3)The concentrations of chlorine and sulfur in coal, NOx, SO2, HCl and Cl2 in flue gas have positive correlation with formation of the oxidized mercury.(4) The concentrations of chlorine, sulfur and mercury in coal have effects on mercury emissions.
coal-fired power station mercury speciation mercury emission flue gas
Yunjun WANG Yufeng DUAN Liguo YANG Yiman JIANG Xianghua YANG Yuqun ZHUO Liang ZHANG Lei CHEN Xuchang XU
Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education, So Department of Thermal Engineering, Tsinghua University, Beijing, China
国际会议
第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)
武汉
英文
859-868
2007-12-01（万方平台首次上网日期，不代表论文的发表时间）