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Show Application of Gas Reburning Technology to Glass Furnaces for NOx Emissions Control Abstract D. K. Moyed~ 1. Pont, R. Koppang Energy and Environmental Research Corporation 18 Mason Irvine, California 92718 L. Donaldson Gas Research Institute 8600 West Bryn Mawr Avenue Chicago, illinois 60631 Like many other high-temperature industrial processes, glass furnaces produce high concentrations of oxides of nitrogen (NOx) due to the high combustion temperatures required to process the glass batch raw materials. Since increasingly stringent air quality regulations are forcing the glass industry to reduce emissions of NOx, there is significant interest in technologies which can be applied to glass furnaces to achieve high levels of emissions control cost effectively. For glass furnaces, available options for NOx control are either very expensive or have the potential to negatively impact the process. Gas Reburning is a NOx control technology which has successfully been demonstrated on utility boilers to provide moderate to high NO x removal efficiencies at a moderate cost per ton of NOx abated. This paper describes the results of a study to assess the potential for and economics of applying gas reburning technology to industrial glass furnaces. Model furnaces were defmed for glass furnaces employed in the manufacturing of flat, container, and fiber glass to pennit a detailed evaluation of reburning technology. Conceptual reburning system designs for each model plant were developed to permit the process perfonnance and costs to be established. Chemical kinetic and heat transfer models were used, respectively, to assess the potential reductions in NOx emissions achievable and to evaluate the impacts of the rebuming process on the overall furnace thennal efficiency. Costs for application of reburning technology to glass furnaces were developed and compared to other available technologies for control of NO x emissions. Introduction Gas Rebuming is a NOx control technology which can be used to control emissions from virtually any continuous emission source. It is not fuel specific and can be applied to equipment frred with coal, oil, gas, biomass or waste fuels. Some of the principal applications where gas reburning can effectively be applied are: utility boilers, industrial boilers, process heaters, incinerators, furnaces, and kilns. A significant amount of the work on the reburning process to date has focused on coal frred utility boilers. This emphasis has been due to concern over acid gases (NOx and S02) and the need for control of acid rain precursors from these systems. |
