Method for burning fuel

Claim 1

THE METHOD OF BURNING A FUEL IN SUSPENSION IN A FURNACE HAVING FLUID COOLED BOUNDARY WALLS WITH MININUM AMOUNT OF NITROGEN OXIDES IN THE COMBUSTION GASES LEAVING THE FURNACE WHICH COMPRISES INTRODUCING THE FUEL INTO THE FURNACE THROUGH A BURNER PORT IN A FURNACE BOUNDARY WALL, INTRODUCING A MAJOR PORTION OF THE COMBUSTION AIR INTO SAID FURNACE AT SAID BURNER PORT IN FURNACE-MIXING RELATIONSHIP WITH SAID FUEL, REGULATING THE AMOUNT OF AIR SUPPLIED THROUGH SAID BURNER PORT TO AN AMOUNT WITHIN THE RANGE OF 80 TO 95% OF THE THEORETICAL COMBUSTION AIR REQUIREMENTS FOR THE CORRESPONDING FUEL TO DELAY THE COMPLETE COMBUSTION OF THE CORRESPONDING FUEL STEAM AND THEREBY REDUCE THE MAXIMUM FLAME TEMPERATURE IN THE FURNACE AND THE FORMATION OF NITROGEN OXIDES BELOW THE VALUES WHICH WOULD OCCUR IF ALL OF THE AIR REQUIRED FOR COMPLETE COMBUSTION WERE INTRODUCED WITH THE FUEL, AND SUPPLYING THE REMAINING AMOUNT OF AIR REQUIRED TO INSURE COMPLETE COMBUSTION OF THE FUEL THROUGH A FURNACE BOUNDARY WALL AT A POSITION SPACED FROM SAID BURNER PORT SO AS TO DIRECT THE STREAM OF THE REMAINING AMOUNT OF AIR IN MIXING RELATION WITH THE BURNING FUEL STREAM BEYOND THE NORMAL MAXIMUM FLAME TEMPERATURE ZONE OF THE FURNACE TO COMPLETE COMBUSTION OF THE FUEL WITHIN THE FURNACE WITH A MIMIMUM FORMATION OF NITROGEN OXIDES IN THE COMBUSTION GASES.

Claim 2

THE METHOD OF BURNING A FUEL IN SUSPENSION IN A FURNACE HAVING FLUID COOLED BOUNDARY WALLS WITH MININUM AMOUNT OF NITROGEN OXIDES IN THE COMBUSTION GASES LEAVING THE FURNACE WHICH COMPRISES INTRODUCING THE FUEL INTO THE FURNACE THROUGH A BURNER PORT IN A FURNACE BOUNDARY WALL, INTRODUCING A MAJOR PORTION OF THE COMBUSTION AIR INTO SAID FURNACE AT SAID BURNER PORT IN FURNACE-MIXING RELATIONSHIP WITH SAID FUEL, REGULATING THE AMOUNT OF AIR SUPPLIED THROUGH SAID BURNER PORT TO AN AMOUNT WITHIN THE RANGE OF 80 TO 95% OF THE THEORETICAL COMBUSTION AIR REQUIREMENTS FOR THE CORRESPONDING FUEL TO DELAY THE COMPLETE COMBUSTION OF THE CORRESPONDING FUEL STEAM AND THEREBY REDUCE THE MAXIMUM FLAME TEMPERATURE IN THE FURNACE AND THE FORMATION OF NITROGEN OXIDES BELOW THE VALUES WHICH WOULD OCCUR IF ALL OF THE AIR REQUIRED FOR COMPLETE COMBUSTION WERE INTRODUCED WITH THE FUEL, AND SUPPLYING THE REMAINING AMOUNT OF AIR REQUIRED TO INSURE COMPLETE COMBUSTION OF THE FUEL THROUGH A FURNACE BOUNDARY WALL AT A POSITION SPACED FROM SAID BURNER PORT SO AS TO DIRECT THE STREAM OF THE REMAINING AMOUNT OF AIR IN MIXING RELATION WITH THE BURNING FUEL STREAM BEYOND THE NORMAL MAXIMUM FLAME TEMPERATURE ZONE OF THE FURNACE TO COMPLETE COMBUSTION OF THE FUEL WITHIN THE FURNACE WITH A MIMIMUM FORMATION OF NITROGEN OXIDES IN THE COMBUSTION GASES.