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John Darrow, Associate at W. L. Gore & Associates, Inc., discussed expanded polytetra-fluoroethylene (ePTFE) based products that could provide solutions to new compliance challenges for PM, dioxin/furan (D/F) and mercury. There was a summary of the potential for ePTFE membrane filter bags for PM control, REMDIA catalytic filtration systems for D/F control and a new carbon polymer composite material for mercury control. The composite material was of great interest to the participants who asked about pressure drop (low), efficiency (70-90 percent in addition to the scrubber removal) and elemental mercury removal (high). Testing is taking place at the Southern Yates station with EPRI also involved. This technology could be used as a second step if the initial attempt to remove mercury in the scrubber falls short. Since this device follows the scrubber it is better suited for a plant with a scrubber. Activated carbon would be injected ahead of the scrubber and would have the effect of reducing the amount removed in the scrubber. Therefore large amounts of carbon would be required to gain small efficiency increases.
Revision Date: 2/17/2011
Tags: 221112 - Fossil Fuel 化石燃料, W. L. Gore, Fabric Filter, MACT
Biography of John Darrow - W. L. Gore - Hot Topic Hour October 28, 2010
BIO: John has been involved in air pollution control for more than 35 years. Currently he is the Energy Market Specialist for W.L. Gore & Associates, Inc (Elkton, MD). He joined Gore in 1982. Prior to Gore, John worked for Sargent & Lundy, Buell Envirotech, Wheelabrator-Frye and Niro Atomizer.
Revision Date: 10/28/2010
Tags: W. L. Gore
John Darrow, Energy Market Specialist at W.L. Gore & Associates, Inc., described the characteristics of ePTFE membrane filter media and compared them to other media available. He said that 35 EGUs were now using this material. However, because of higher material cost, it was not necessarily the best solution for every power plant. He described a four-step process to go through to determine what the best media would be for a specific power plant to achieve the objective – “Getting the Lowest Annualized Cost w/o Emissions Problems.”
Revision Date: 10/28/2010
Tags: 221112 - Fossil Fuel 化石燃料, W. L. Gore, Membrane