Lee, Sung Jun
(Department of Environmental Engineering, Yonsei Institute of Environmental Science and Technology, YIEST, Yonsei University, 234 Maeji-Ri, Heung-Up, Wonju 220-710, South Korea)
,
Seo, Yong-Chil
(Department of Environmental Engineering, Yonsei Institute of Environmental Science and Technology, YIEST, Yonsei University, 234 Maeji-Ri, Heung-Up, Wonju 220-710, South Korea)
,
Jang, Ha-Na
(Department of Environmental Engineering, Yonsei Institute of Environmental Science and Technology, YIEST, Yonsei University, 234 Maeji-Ri, Heung-Up, Wonju 220-710, South Korea)
,
Park, Kyu-Shik
(Department of Environmental Engineering, Yonsei Institute of Environmental Science and Technology, YIEST, Yonsei University, 234 Maeji-Ri, Heung-Up, Wonju 220-710, South Korea)
,
Baek, Jeom-In
(Power Generation Research Laboratory, Korea Electric Power Research Institute, Daejon 103-16, South Korea)
,
An, Hi-Soo
(Power Generation Research Laboratory, Korea Electric Power Research Institute, Daejon 103-16, South Korea)
,
Song, Kwang-Chul
(Power Generation Research Laboratory, Korea Electric Power Research Inst)
AbstractCharacterization and mass balance of mercury in a coal-fired power plant were carried out in a 500MW, bituminous coal consuming electric utility boiler. This facility is equipped with a cold-side electrostatic precipitator (ESP) and a wet flue gas desulfurization (FGD) in series as air pollu...
AbstractCharacterization and mass balance of mercury in a coal-fired power plant were carried out in a 500MW, bituminous coal consuming electric utility boiler. This facility is equipped with a cold-side electrostatic precipitator (ESP) and a wet flue gas desulfurization (FGD) in series as air pollution control devices (APCDs). Mercury sampling points were selected at both the up and down streams of the ESP and outlet of the FGD, which is at stack. Two different types of sampling methods were employed, one is the Ontario Hydro (OH) method (ASTM D6784) and the other is US EPA101A. Various samples were collected from the coal-fired power plant such as fuel coals, fly ash in hopper, lime/lime stone, gypsum, and effluent water from FGD. These samples were analyzed by US EPA 7470A and 7471A to understand the behavior and mass balance of mercury in the process of a coal-fired power plant. There are no significant differences between the two sampling methods, but the OH method seems to have more advantages for Hg sampling from a coal-fired power plant because mercury speciation is quite an important factor to estimate the mercury emission and control efficiency from combustion flue gas. Approximate Hg mass balance could be obtained from various samples in the study; however, a series of long-term and comprehensive study is required to evaluate the reliable Hg mass distribution and behavior in a coal-fired power plant.
AbstractCharacterization and mass balance of mercury in a coal-fired power plant were carried out in a 500MW, bituminous coal consuming electric utility boiler. This facility is equipped with a cold-side electrostatic precipitator (ESP) and a wet flue gas desulfurization (FGD) in series as air pollution control devices (APCDs). Mercury sampling points were selected at both the up and down streams of the ESP and outlet of the FGD, which is at stack. Two different types of sampling methods were employed, one is the Ontario Hydro (OH) method (ASTM D6784) and the other is US EPA101A. Various samples were collected from the coal-fired power plant such as fuel coals, fly ash in hopper, lime/lime stone, gypsum, and effluent water from FGD. These samples were analyzed by US EPA 7470A and 7471A to understand the behavior and mass balance of mercury in the process of a coal-fired power plant. There are no significant differences between the two sampling methods, but the OH method seems to have more advantages for Hg sampling from a coal-fired power plant because mercury speciation is quite an important factor to estimate the mercury emission and control efficiency from combustion flue gas. Approximate Hg mass balance could be obtained from various samples in the study; however, a series of long-term and comprehensive study is required to evaluate the reliable Hg mass distribution and behavior in a coal-fired power plant.
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