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By III Charles H. Drummond

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Generally, if this is the case, the economic benefit is even more compelling in favor of implementation of batch and cullet preheating. Pollution Emission Reductions Glass furnaces emit pollutants with their exhaust gases, including particulate, SO,, NO,, HF, HCI, and CO,. These pollutant emissions to atmosphere are regulated by governments worldwide, although mandated levels and timetables for compliance vary from region to region. However, two common trends can be observed: for any given furnace, allowed emission levels will always decrease in the future, and when emission reductions are mandated, governments usually insist on emission levels consistent with highperformance add-on gas cleaning plants.

1, 2, and 3 simultaneously, we can derive an expression for the relationship between the device efficiency and pollutant emission reduction efficiency: This equation can be plotted and is shown in Fig. 6. 0). As can be seen from the graphs, the abatement efficiency can be significantly higher than the device efficiency. 5, a device efficiency of 90% would result in an abatement efficiency of nearly 95%. 46 Figure 6. Abatement efficiency vs. device efficiency for various gas recirculation ratios.

National Commision for the Dutch Glass Industry, The Netherlands, 1997. C. J. J. Peelen, “Recycling of Glass in Europe,” Glass Researcher 4 [ 11 8-9+ (1 994). M. Beutinger, “Einsatz von Recyclingglas in der Hohlglasschmelze” (in German), Glastech. Be,: Glass Sci. Technol. 68 [4] N5 1-N58 (1995). -K. Gliising and R. Conradt, “Alternative uses of recycled cullet: Problematical impurities and alternative forming”; pp. 31-37 in Proceedings of the 5th ESG Conference: Glass Science and Technologyfor the 21st Century.

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61st Conference on Glass Problems by III Charles H. Drummond

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