High and low burner gun flue coke oven with waste gas recirculation and decarbonizing air

Claim 1

IN A COKING RETORT OVEN, A HORIZONTAL HEATING WALL CONSTITUTED OF TWO SETS OF VERTICAL COMBUSTION FLUES EACH OPERABLE IN ALTERNATION WITH THE OTHER FOR UPFLOW COMBUSTION AND DOWNFLOW OF COMBUSTION PRODUCTS, SAID FLUES EACH HAVING A REGENERATOR AIR INLET PORT AT ITS BOTTOM FOR INFLOW OF REGENERATIVELY PREHEATED AIR THERETO FROM A REGENERATOR AND FOR OUTFLOW OF WASTE GASES OF COMBUSTION FROM THE FLUE TO SAID REGENERATOR, A PAIR OF HORIZONTAL RICH FUEL GAS GUN FLUES OPERABLE IN ALTERNATION WITH EACH OTHER FOR INFLOW OF RICH FUEL GAS, SAID GUN FLUES EXTENDING LENGTHWISE OF THE HEATING WALL AT THE BOTTOM OF SAID FLUES, WITH RICH FUEL GAS RISER DUCTS LEADING FROM ONE OF THE TWO GUN FLUES TO THE BOTTOM OF THE FLUES OF ONE SET, AND WITH RICH GAS RISER DUCTS LEADING FROM THE OTHER OF THE TWO GUN FLUES TO THE BOTTOMS OF THE FLUES OF THE OTHER SET, A WASTE GAS RECIRCULATION DUCT AT EACH OF THE OPPOSITE ENDS OF THE HORIZONTAL HEATING WALLS, SAID WASTE GAS RECIRCULATION DUCTS CONNECTING EACH ONE OF THE GUN FLUES WITH A REGENERATOR, ONE FLUE WITH A REGENERATOR OPERABLE FOR INFLOW OF AIR AND OUTFLOW OF WASTE GAS IN ALTERNATION WITH THE OFF AND ON OPERATION OF THE GUN FLUE, AND THE OTHER FLUE WITH A DIFFERENT REGENERATOR OPERABLE FOR OUTFLOW OF WASTE GAS AND AIR INFLOW IN ALTERNATION WITH THE ON AND OFF OPERATION OF THE OTHER GUN FLUE.