NOx reduction device
AssigneeLennox Manufacturing Inc.
InventorsMatthew S. Riepenhoff, Glenn W. Kowald, Randy D. Smith, Hugh E. Vinson
Life of this patent
Estimating the term…
Abstract
In a gas-burning apparatus, such as a furnace, a device for reducing NOx emissions includes a cup member mounted proximate to an inlet to a combustion chamber of the apparatus and a perforate member attached to the cup member and located in the combustion chamber at a predetermined distance inwardly from the inlet. The perforate member has a plurality of holes to define a mesh pattern through which the flame and other products of combustion are constrained to pass within the combustion chamber. The perforate member acts as a heat sink to reduce the flame temperature, thereby inhibiting NOx production.
Claims20
In a gas-burning apparatus having a combustion chamber with an inlet and an outlet, a burner spaced from and aligned with the inlet for burning a combustible mixture of gas and air to produce a flame and other products of combustion, and an air mover for drawing the flame and other products of combustion into and through the combustion chamber, a device for reducing NOx emissions from the apparatus, said device comprising a perforate member located in the combustion chamber and having a plurality of holes therein to allow the flame and other products of combustion to pass through said perforate member, said device further including a cup member mounted proximate to the inlet and an attachment member attached at one end thereof to said perforate member and at an opposite end thereof to said cup member, said perforate member being spaced at a predetermined distance from said cup member inwardly along a longitudinal axis of the combustion chamber between the inlet and the outlet.
In combination:
- a gas-burning apparatus having a combustion chamber with an inlet and an outlet, a burner spaced from and aligned with the said inlet for burning a combustible mixture of gas and air to produce a flame and other products of combustion, and an air mover for drawing the flame and other products of combustion into and through said combustion chamber;
- and
- a device for reducing NOx emissions from said apparatus, said device comprising a perforate member located in said combustion chamber and having a plurality of holes therein to allow the flame and other products of combustion to pass through said perforate member, said device further including a cup member mounted proximate to said inlet and an attachment member attached at one end thereof to said perforate member and at an opposite end thereof to said cup member, said perforate member being spaced at a predetermined distance from said cup member inwardly along a longitudinal axis of said combustion chamber between said inlet and said outlet.
In a gas-burning apparatus having a combustion chamber with an inlet and an outlet, a burner spaced from and aligned with the inlet for burning a combustible mixture of gas and air to produce a flame and other products of combustion, and an air mover for drawing the flame and other products of combustion into and through the combustion chamber, a device for reducing NOx emissions from the apparatus, said device comprising a perforate member located in the combustion chamber and having a plurality of holes therein to allow the flame and other products of combustion to pass through said perforate member, said device further including a cup member mounted proximate to the inlet and an attachment member attached at one end thereof to said perforate member and at an opposite end thereof to said cup member, said perforate member being spaced at a predetermined distance from said cup member inwardly along a longitudinal axis of the combustion chamber between the inlet and the outlet, said cup member being tapered in a direction from the inlet toward said perforate member.
Dependencies are inferred from the claim text.