Apparatus for providing waste gas recirculation in coke oven batteries

In a gun flue type coke oven battery having a plurality of heating chambers, heating walls having flues therein, a plurality of internal fuel conduit means adapted to carry a gaseous fuel into the flues of each heating wall for burning therein and means for conducting the waste gases of combustion to a regenerator for regenerating said gases by reclaiming heat therefrom, the improvement comprising:

• a. a plurality of first conduit means carrying fuel gas into a preselected internal conduit means for the flues for said heating walls, said first conduit means being disposed outside of said battery, said first conduit means including control means for selectively diverting the fuel gas to a selected first conduit means,
• b. a plurality of second conduit means adapted to carry said regenerated waste gas into said first conduit means, said second conduit means being disposed outside of said battery,
• c. a third conduit means communicating with a reservoir means disposed outside said battery for receiving said regenerated gas from said regenerating means and with said second conduit means, said third conduit means including control means for selectively diverting the flow of regenerated gas to a preselected second conduit means;
• and
• d. means for aspirating said regenerated gas with said fuel gas.