Device for rueckfuehren of exhaust gas from the not inflamed flues to the inflamed flues of less than burners - coke oven batteries

摘要

ABSTRACTAn ejector style exhaust gas recirculation jet is disclosed,for use in the underjet firing system of a coke oven battery, wherein along throat of conventional diameter is combined with a non-tapered, reducedradius inlet trumpet and a straight nozzle positioned out of the entryflow path of hot exhaust gases. The present invention reduces deteriorationof the nozzle from hot gas bombardment and at the same time stabilizes flowrate and pressure differentials in the entry and exit flues connected tothe ejector resulting in more reliable and precise controlability ofthe coke oven combustion system.