Burning of regenerator flue gas

Claim 1

PROCESS FOR THE BURNING OF CATALYTIC CRACKING REGENERATOR FLUE GAS CONTAINING FROM ABOUT 5 TO ABOUT 10% BY VOLUME CARBON MONOXIDE AND ESSENTIALLY NO OXYGEN AND HAVING A COMBUSTION VALUE OF 150 TO 300 CALORIES PER CUBIC METER WITH A LIQUID FUEL, THE AMOUNT OF LIQUID FUEL BEING SUCH THAT ITS CALORIFIC VALUE IS APPROXIMATELY 50% OF THEAT OF THE CATALYTIC CRACKING REGENERATOR FLUE GAS, WITH COMPRISES SPRAYING THE LIQUID FUEL IN THE FORM OF A FORWARDLY DIVERGING CONICAL SPRAY, ADVANCING PRIMARY COMBUSTION AIR IN A ROTATING STREAM COAXIALLY TO THE CONICAL SPRAY AND IMPINGING THE COMBUSTION AIR UPON THE CONICAL SPRAY, IGNITING THE PRIMARY COMBUSTION AIR AND LIQUID FUEL IN THE CONICAL SPRAY, UNIFORMLY PREMIXING CATALYTIC CRACKING REGENETOR FLUE GAS WITH THE REQUIRED AMOUNT OF AIR FOR COMBUSTIN OF THE CARBON MONOXIDE THEREIN AND PASSING THE FLUE GAS-AIR MIXTURE COAXIALLY IN AN ANNULAR STREAM INTO THE FORWARD DIVERGING CONICAL SPRAY SO AS TO IMPINGE UPON THE CONICAL SPRAY FORWARD OF THE POINT OF IGINITION OF THE LIQUID FUEL.