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Mercury speciation and emission from the coal‐fired power plant filled with flue gas desulfurization equipment
Author(s) -
Wang Yunjun,
Duan Yufeng,
Yang Liguo,
Huang Zhijun,
Meng Suli,
Zhao Changsui
Publication year - 2010
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20331
Subject(s) - flue gas desulfurization , mercury (programming language) , flue gas , electrostatic precipitator , environmental chemistry , coal , waste management , gypsum , chemistry , power station , flue gas emissions from fossil fuel combustion , elemental mercury , flue , sulfur dioxide , environmental science , metallurgy , materials science , inorganic chemistry , engineering , electrical engineering , computer science , programming language
Mercury speciation and emission from two Chinese coal‐fired power stations equipped with flue gas desulfurization device were investigated. Research results reveal that Hg 0 is the main form in the flue gas in Plant 1; Hg 2+ is the main form in the flue gas in Plant 2. Most of mercury was emitted to the atmosphere, which was about 77–98%, and the elemental mercury released to atmosphere ranged 73–94% approximately. A pot of mercury is adsorbed by bottom ash, electrostatic precipitator (ESP) ash, and gypsum in Plant 1. However, most mercury, the scale of which is 75–83.2%, is collected by ESP ash, and only 7.0–12.2% mercury is emitted to the atmosphere in Plant 2. The mercury removal by NID semi‐desulfurization system is higher than wet flue gas desulfurization (WFGD) desulfurization system.