Combustion burner and combustion method thereof in furnace

A combustion method for a burner in a heating furnace comprising:

• (a) providing a regenerative burner in a heating furnace, the regenerative burner comprising:
• an air supply passage including a regenerative body and having an air supply port for supplying air to a heating furnace, the air supply port having a diameter Da in mm;
• a primary fuel nozzle having a primary fuel supply port for supplying a primary fuel to the air supply passage;
• and
• a plurality of secondary fuel nozzles each having a secondary fuel supply port, the secondary fuel nozzles are arranged around the air supply port of the air supply passage, for supplying a secondary fuel;
• (b) arranging the secondary fuel nozzles so that a distance L in mm from a periphery of the air supply port to a periphery of the secondary fuel supply ports is larger than the diameter Da in mm of the air supply port;
• and
• (c) determining the distance L in mm from the periphery of the air supply port to the periphery of the secondary fuel supply port and the diameter Da in mm of the air supply port in correspondence with an actual velocity of air injected into the heating furnace from the air supply port.