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Show DESIGN BASIS OXY-FUEL AIR-FUEL TEAM BASE CASE GLASS PRODUCTION RATE 250 T/D 250 T/D ELECTRIC BOOSTING 750 KW 1,500 KW OXYGEN PREHEATING 465°F NONE NATURAL GAS PREHEATING 750°F NONE MELTER CONFIGURATION UNIT MELTER REGENERATIVE MELTER FLUE GAS EXIT TEMPERATURE 2,200°F 2,7l9°F The TEAM processes replace the conventional regenerative air-fuel melter with a unit melter type configuration. In a unit melter the products of combustion from the oxy-fuel burners, along the length of the melter, draft to a common flue at the feed end of the furnace. In this way the products of combustion are able to exchange heat with the coldest part of the furnace and exit at a much lower temperature relative to a regenerative melter as seen above. This markedly improves the thermal efficiency of the melter. IV. A. NATURAL GAS REFORMING TEAM PROCESSES In this heat recovery scheme the sensible heat from the glass melter flue gas is utilized mainly to provide the endothermic heat of reaction for either of the following reforming reactions: CH4 + H20 t CO + 3H2 CH4 + C02 t 2CO + 2H2 The sensible heat from the flue gas, now stored in the higher enthalpy of the products, is released directly to the glass melter, where it's manifested through the higher heat of combustion of the carbon monoxide/hydrogen mixture relative to methane. The carbon monoxide, hydrogen mixture, commonly referred to in industry as syngas is generally manufactured by passing a mixture of natural gas and steam or carbon dioxide over a catalyst in tubes which are directly fired to provide the endothermic heat of reaction. This process uses similar catalyst-packed tubes for the reforming reactions. However, instead of direct firing, the heat for the reaction is provided by the glass furnace exhaust gas. PROCESS DESCRIPTION As shown in the two reactions above either steam or carbon dioxide can be used for reforming the methane in the natural gas. Both methods, depicted in Figures 3 and 4, are described briefly below - 4 - |