Advanced Emissions Control Development Program: Phase III

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The primary objective of the Advanced Emissions Control Development Program (AECDP) is to develop practical, cost-effective strategies for reducing the emissions of air toxics from coal-fired boilers. The project goal is to effectively control air toxic emissions through the use of conventional flue gas clean-up equipment such as electrostatic precipitators (ESPs), fabric filters (baghouses - BH), and wet flue gas desulfurization systems (WFGD). Development work concentrated on the capture of trace metals, fine particulate, hydrogen chloride and hydrogen fluoride, with an emphasis on the control of mercury. The AECDP project is jointly funded by the US Department of Energy's Federal ... continued below

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98 pages

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Amrhein, G.T.; Bailey, R.T.; Downs, W.; Holmes, M.J.; Kudlac, G.A. & Madden, D.A. July 1, 1999.

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Description

The primary objective of the Advanced Emissions Control Development Program (AECDP) is to develop practical, cost-effective strategies for reducing the emissions of air toxics from coal-fired boilers. The project goal is to effectively control air toxic emissions through the use of conventional flue gas clean-up equipment such as electrostatic precipitators (ESPs), fabric filters (baghouses - BH), and wet flue gas desulfurization systems (WFGD). Development work concentrated on the capture of trace metals, fine particulate, hydrogen chloride and hydrogen fluoride, with an emphasis on the control of mercury. The AECDP project is jointly funded by the US Department of Energy's Federal Energy Technology Center (DOE), the Ohio Coal Development Office within the Ohio Department of Development (OCDO), and Babcock and Wilcox, a McDermott company (B and W). This report discusses results of all three phases of the AECDP project with an emphasis on Phase III activities. Following the construction and evaluation of a representative air toxics test facility in Phase I, Phase II focused on characterization of the emissions of mercury and other air toxics and the control of these emissions for typical operating conditions of conventional flue gas clean-up equipment. Some general comments that can be made about the control of air toxics while burning a high-sulfur bituminous coal are as follows: (1) particulate control devices such as ESP's and baghouses do a good job of removing non-volatile trace metals, (2) particulate control devices (ESPs and baghouses) effectively remove the particulate-phase mercury, but the particulate-phase mercury was only a small fraction of the total for the coals tested, (3) wet scrubbing can effectively remove hydrogen chloride and hydrogen fluoride, and (4) wet scrubbers show good potential for the removal of mercury when operated under certain conditions, however, for certain applications, system enhancements can be required to achieve high removals when the scrubber is operated downstream of an ESP. Phase III (Advanced Concepts and Comparison Coals) testing was directed at the development of enhanced air toxics emissions control strategies to further reduce the emissions of mercury. Phase III results further supported the findings of previous phases and demonstrated several methods of enhancing mercury control for both unscrubbed systems and systems equipped with WFGD. Results confirmed that the addition of sorbents can be used to significantly improve the capture of mercury in downstream particulate collection equipment. In addition, Phase III testing demonstrated three methods of minimizing the potential negative impact of an ESP on downstream control of mercury in WFGD systems. These methods included decreased oxidation air flow, the addition of H{sub 2}S into the flue gas at the scrubber inlet, and the addition of EDTA into the absorber reaction tank.

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98 pages

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OSTI as DE00756595

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  • Other Information: PBD: 1 Jul 1999

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  • Report No.: DE--FC22-94PC94251-22
  • Grant Number: FC22-94PC94251
  • DOI: 10.2172/756595 | External Link
  • Office of Scientific & Technical Information Report Number: 756595
  • Archival Resource Key: ark:/67531/metadc710758

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  • July 1, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 15, 2016, 1:40 p.m.

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Amrhein, G.T.; Bailey, R.T.; Downs, W.; Holmes, M.J.; Kudlac, G.A. & Madden, D.A. Advanced Emissions Control Development Program: Phase III, report, July 1, 1999; Morgantown, West Virginia. (digital.library.unt.edu/ark:/67531/metadc710758/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.