Methods and apparatus for burning fuel with low No.sub.x formation

  • US 5,344,307 A
  • Filed: 08/25/1993
  • Issued: 09/06/1994
  • Est. Priority Date: 09/07/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of discharging an at least substantially stoichiometric mixture of fuel and air from a burner into a furnace space wherein said mixture is burned and flue gases having low NOx content are formed therefrom comprising the steps of:

  • (a) discharging said air from said burner into said furnace space;

    (b) discharging a portion of said fuel in the form of a fuel jet in a passageway in said burner communicated with said furnace space whereby flue gases in said furnace space are drawn into said passageway with said fuel;

    (c) discharging said fuel and flue gases from said passageway into said furnace space whereby said fuel and flue gases mix with air and the mixture is burned in a primary reaction zone in said furnace space; and

    (d) discharging the remaining portion of said fuel into a secondary reaction zone in said furnace space whereby said fuel mixes with flue gases and air contained in said furnace space and is burned in said secondary reaction zone.

View all claims

    Thank you for your feedback