Air heating burner
AssigneeEclipse, Inc.
InventorsMatvey Fayerman, Ad de Pijper, David Collier
Life of this patent
Estimating the term…
Abstract
An air heating burner having improved CO emissions across a broad range of heat inputs. The burner incorporates wings which cover portions of mixing plates associated with low to medium-low fire. The wings reduce air flow velocity to eliminate quenching during such conditions, thereby increasing combustion temperature and reducing CO emissions. The wings also form pre-heat chambers which further increase combustion temperature. The burner produces a substantially consistent level of CO emissions across the range of inputs, regardless of the pressure drop across the burner.
Claims23
An air heating burner adapted to be placed in an air flow, the air heating burner comprising:
- an elongate fuel manifold having a plurality of discharge ports aligned along its length for discharging fuel downstream along a flow axis;
- pair of mixing plates secured to the manifold on opposing sides of the flow axis, the mixing plates diverging from each other as the mixing plates extend downstream from the manifold, each mixing plate having a plurality of combustion air ports located at various distances downstream from the fuel manifold, the combustion air ports for mixing air flow with fuel flow to form a combustible air-fuel mixture between the mixing plates;
- and
- a pair of wings, one for each mixing plate, each wing covering a plurality of combustion air ports located in proximity to the manifold leaving combustion air ports downstream of the wings exposed, the wings spaced from their respective mixing plates to define a pair of chambers, the wings having a plurality of air flow holes for introducing air into the chambers, the air exiting the chambers at a location between the mixing plates beginning immediately downstream of the fuel manifold.
An air heating burner adapted to be placed in a process air flow, the air heating burner comprising:
- an elongate fuel manifold having a plurality of discharge ports aligned along its length for discharging fuel downstream along a flow axis;
- a pair of mixing plates secured to the manifold on opposing sides of the flow axis, the mixing plates diverging from each other as the mixing plates extend downstream from the manifold, each mixing plate having a plurality of combustion air ports for mixing air flow with fuel flow to form an air-fuel mixture between the mixing plates, the combustion air ports located at various distances downstream from the fuel manifold and sized to supply a sufficient amount of air to immediately obtain a combustible air-fuel mixture for localized combustion;
- and
- a pair of wings, one for each mixing plate, the wings attached to the mixing plates and spaced therefrom to define a pair of chambers proximate the manifold, the combustion air ports located downstream of the wings being exposed, the wings having a plurality of air flow holes for introducing air into the chambers, the air flow holes spanning an area overlapping the combustion air ports.
A method of reducing the CO emissions of an air heating burner having a fuel manifold for discharging fuel downstream between a pair of mixing plates and along a flow axis, the mixing plates having a plurality of combustion air ports for mixing an air flow with the fuel flow to form an air-fuel mixture that burns at a fire flame size in the range of low to high fire, the method comprising the steps of:
- attaching a pair of wings, one for each mixing plate, to the mixing plates to define a pair of chambers proximate the manifold, the wings having a plurality of air flow holes for introducing air into the chambers and providing a pressure drop that reduces the air flow velocity through the mixing plates, the air of reduced velocity exiting the chambers at a location between the mixing plates beginning immediately downstream of the fuel manifold.
An air heating burner adapted to be placed in an air flow, the air heating burner comprising:
- an elongate fuel manifold having a plurality of discharge ports aligned along its length for discharging fuel downstream along a flow axis;
- a pair of mixing plates secured to the manifold on opposing sides of the flow axis, the mixing plates diverging from each other as the mixing plates extend downstream from the manifold, each mixing plate having a plurality of combustion air ports located at various distances downstream from the fuel manifold, the combustion air ports for mixing air flow with fuel flow to form a combustible air-fuel mixture between the mixing plates;
- and
- a pair of wings, one for each mixing plate, each wing covering a plurality of combustion air ports located in proximity to the manifold leaving combustion air ports downstream of the wings exposed, the wings spaced from their respective mixing plates to define a pair of chambers, the wings having a plurality of air flow holes for introducing air into the chambers, the furthest upstream air flow holes being positioned downstream of the furthest upstream combustion air ports.
Dependencies are inferred from the claim text.