The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
Chiawei Wang - One of the best experts on this subject based on the ideXlab platform.
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abatement of mercury emissions in the coal combustion process equipped with a Fabric Filter baghouse
Fuel, 2008Co-Authors: Chinmin Cheng, Chienwei Chen, Chiawei WangAbstract:Abstract The purpose of this study was to investigate the dependence of mercury emissions on coal ranks and electric utility boilers equipped with Fabric Filter Baghouses (FF). A comparison of mercury emission rates and fly ash properties was made between a circulating Fluidized Bed Combustor (CFBC) with FF and a Pulverized Coal (PC) combustor with FF during the burning of all three ranks of American coals. The data were collected from the Environmental Protection Agency Information Collection Request (EPA ICR) and WKU ICSET’s mercury testing program. A statistical stepwise regression procedure was used to determine significant factors such as coal rank and types of boilers equipped with FF on mercury emissions during coal combustion. The higher mercury emission rates were generally found in both CFB and PC units when lignite was burned. The lower mercury emission rates were generally found in both CFB equipped with FF and PC units equipped with FF when bituminous coal was burned. There was a statistically significant lower mercury emission in the CFBC equipped with FF than that in the PC units when sub-bituminous coal was burned. Lower mercury emission rates in electric utility boilers equipped with FF are due to the active fly ash generated with a larger specific surface area and pore volume. Higher mercury emission rates observed during lignite-fired boilers may be due to their lower specific area of fly ash, which results from lower LOI, as well as the pore blockage by selenium (Se) for Texas lignite; and sodium (Na) and potassium (K) for North Dakota lignite. There is no significant mutual benefit for the mercury captured by the addition of Spray Dry Absorber (SDA) or selective non-catalytic reduction (SNCR) in the CFBC system.
Chinmin Cheng - One of the best experts on this subject based on the ideXlab platform.
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abatement of mercury emissions in the coal combustion process equipped with a Fabric Filter baghouse
Fuel, 2008Co-Authors: Chinmin Cheng, Chienwei Chen, Chiawei WangAbstract:Abstract The purpose of this study was to investigate the dependence of mercury emissions on coal ranks and electric utility boilers equipped with Fabric Filter Baghouses (FF). A comparison of mercury emission rates and fly ash properties was made between a circulating Fluidized Bed Combustor (CFBC) with FF and a Pulverized Coal (PC) combustor with FF during the burning of all three ranks of American coals. The data were collected from the Environmental Protection Agency Information Collection Request (EPA ICR) and WKU ICSET’s mercury testing program. A statistical stepwise regression procedure was used to determine significant factors such as coal rank and types of boilers equipped with FF on mercury emissions during coal combustion. The higher mercury emission rates were generally found in both CFB and PC units when lignite was burned. The lower mercury emission rates were generally found in both CFB equipped with FF and PC units equipped with FF when bituminous coal was burned. There was a statistically significant lower mercury emission in the CFBC equipped with FF than that in the PC units when sub-bituminous coal was burned. Lower mercury emission rates in electric utility boilers equipped with FF are due to the active fly ash generated with a larger specific surface area and pore volume. Higher mercury emission rates observed during lignite-fired boilers may be due to their lower specific area of fly ash, which results from lower LOI, as well as the pore blockage by selenium (Se) for Texas lignite; and sodium (Na) and potassium (K) for North Dakota lignite. There is no significant mutual benefit for the mercury captured by the addition of Spray Dry Absorber (SDA) or selective non-catalytic reduction (SNCR) in the CFBC system.
Chienwei Chen - One of the best experts on this subject based on the ideXlab platform.
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abatement of mercury emissions in the coal combustion process equipped with a Fabric Filter baghouse
Fuel, 2008Co-Authors: Chinmin Cheng, Chienwei Chen, Chiawei WangAbstract:Abstract The purpose of this study was to investigate the dependence of mercury emissions on coal ranks and electric utility boilers equipped with Fabric Filter Baghouses (FF). A comparison of mercury emission rates and fly ash properties was made between a circulating Fluidized Bed Combustor (CFBC) with FF and a Pulverized Coal (PC) combustor with FF during the burning of all three ranks of American coals. The data were collected from the Environmental Protection Agency Information Collection Request (EPA ICR) and WKU ICSET’s mercury testing program. A statistical stepwise regression procedure was used to determine significant factors such as coal rank and types of boilers equipped with FF on mercury emissions during coal combustion. The higher mercury emission rates were generally found in both CFB and PC units when lignite was burned. The lower mercury emission rates were generally found in both CFB equipped with FF and PC units equipped with FF when bituminous coal was burned. There was a statistically significant lower mercury emission in the CFBC equipped with FF than that in the PC units when sub-bituminous coal was burned. Lower mercury emission rates in electric utility boilers equipped with FF are due to the active fly ash generated with a larger specific surface area and pore volume. Higher mercury emission rates observed during lignite-fired boilers may be due to their lower specific area of fly ash, which results from lower LOI, as well as the pore blockage by selenium (Se) for Texas lignite; and sodium (Na) and potassium (K) for North Dakota lignite. There is no significant mutual benefit for the mercury captured by the addition of Spray Dry Absorber (SDA) or selective non-catalytic reduction (SNCR) in the CFBC system.
Bruce G. Miller - One of the best experts on this subject based on the ideXlab platform.
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Emissions Control Strategies for Power Plants
Clean Coal Engineering Technology, 2011Co-Authors: Bruce G. MillerAbstract:This chapter focuses on emission control strategies for power plants. Power plant operators in the United States have been installing new pollution-control technologies to meet ever-tightening regulatory standards for clean air. The Clean Air Act of 1970 established national standards to limit levels of air pollutants, such as sulfur dioxide, nitrogen oxides, carbon monoxide, ozone, lead, and particulate matter. Particulate control devices, specifically electrostatic precipitators (ESPs) and Fabric Filter Baghouses, began to be installed on power plants, and efforts to develop new control technology, including flue gas desulfurization units, commonly called scrubbers, to remove sulfur from flue gas led to the installation of such units on many power generation facilities. In addition, technologies to reduce nitrogen oxides began to be developed. The 1990 Clean Air Act Amendments contained major revisions to the Clean Air Act and required further reductions in power plant emissions, especially sulfur- and nitrogen-containing pollutants that contribute to acid rain. This chapter discusses the progress that has been made over the last 30 years in reducing emissions from coal-fired power plants. Commercial control strategies for pollutants that are currently regulated, such as sulfur dioxide, nitrogen oxides, and particulate matter, are also explained.
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CHAPTER 6 – Emissions Control Strategies for Power Plants
Coal Energy Systems, 2005Co-Authors: Bruce G. MillerAbstract:Publisher Summary This chapter focuses on emission control strategies for power plants. Power plant operators in the United States have been installing new pollution-control technologies to meet ever-tightening regulatory standards for clean air. The Clean Air Act of 1970 established national standards to limit levels of air pollutants, such as sulfur dioxide, nitrogen oxides, carbon monoxide, ozone, lead, and particulate matter. Particulate control devices, specifically electrostatic precipitators (ESPs) and Fabric Filter Baghouses, began to be installed on power plants, and efforts to develop new control technology, including flue gas desulfurization units, commonly called scrubbers, to remove sulfur from flue gas led to the installation of such units on many power generation facilities. In addition, technologies to reduce nitrogen oxides began to be developed. The 1990 Clean Air Act Amendments contained major revisions to the Clean Air Act and required further reductions in power plant emissions, especially sulfur- and nitrogen-containing pollutants that contribute to acid rain. This chapter discusses the progress that has been made over the last 30 years in reducing emissions from coal-fired power plants. Commercial control strategies for pollutants that are currently regulated, such as sulfur dioxide, nitrogen oxides, and particulate matter, are also explained.
Richard J. Martin - One of the best experts on this subject based on the ideXlab platform.
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Prediction of particulate loading in exhaust from Fabric Filter Baghouses with one or more failed bags
Journal of The Air & Waste Management Association, 2006Co-Authors: Wenjun Qin, Manuel Dekermenjian, Richard J. MartinAbstract:Loss of filtration efficiency in a Fabric Filter baghouse is typically caused by bag failure, in one form or another. The degree of such failure can be as minor as a pinhole leak or as major as a fully involved baghouse fire. In some cases, local air pollution regulations or federal hazardous waste laws may require estimation of the total quantity of particulate matter released to the environment as a result of such failures. In this paper, a technique is presented for computing the dust loading in the baghouse exhaust when one or more bags have failed. The algorithm developed is shown to be an improvement over a previously published result, which requires empirical knowledge of the variation in baghouse pressure differential with bag failures. An example calculation is presented for a baghouse equipped with 200 bags. The prediction shows that a small percentage of failed bags can cause a relatively large proportion of the gas flow to bypass the active bags, which, in turn, leads to high outlet dust loading and low overall collection efficiency from the baghouse.
