DEVELOPMENT OF AN ADVANCED BATCH/CULLET PREHEATER FOR OXY-FUEL FIRED GLASS FURNACES

摘要

Over 10 waste heat recovery systems have been installed on commercial container glass furnaces and have achieved significant fuel reduction. Several of these furnaces are oxy-fuel fired furnaces equipped with batch/cullet preheaters, and they have demonstrated specific fuel consumption of 2.8 to 3 MMBTU/ton for container glass with 50-60% cullet when the batch/cullet was preheated to about 600 to 700 F. This represents energy savings of about 30% relative to state-of-the-art regenerative furnaces. Praxair is currently developing a new advanced batch/cullet preheater system designed specifically for oxy-fuel fired glass furnaces. A 15 tpd pilot system has been built at the Praxair Technology Center in Tonawanda, NY and preliminary results indicate batch/cullet preheat temperatures approaching 1000F can be achieved with this technology. It is estimated that a commercial version of this system will enable container glass furnaces to operate with projected specific fuel consumption as low as 2.5 MMBTU/ton.