Process for exploiting a burner and burners for a rotary tubular furnance
AssigneeEnterprise Generale De Chauffage Industries Pillard
InventorWerner Collenbusch
Life of this patent
Estimating the term…
Abstract
This invention relates to a process for exploitation of a burner and to a burner for rotary tubular furnaces, wherein fuels and primary combustion air are supplied concentrically and the burner comprises a burner nozzle which comprises concentric supply conduits for the fuel and for the primary combustion air in the form of axial air and eddying air. In order to procure a process and burner which may operate with a smaller proportion of primary air and a greater range of adjustment, a dead zone is provided at the center of the flame directly all around a central fuel conduit and within an annular fuel supply conduit, in which a very small proportion of fuel is sent.
Claims13
A burner for a rotary tube furnace comprising;
- a flame stabilizer having a central opening, said flame stabilizer being being disposed adjacent a distal end of said burner,
- a plurality of concentrically arranged fuel supply conduits, said conduits having fuel outlet openings disposed outside said flame stabilizer,
- means forming a primary air supply conduit, said flame stabilizer being located in said primary air supply conduit.
- means forming concentrically arranged combustion air channels, said combustion air channels having outlet orifices,
- said combustion air channels and said outlet orifices being arranged and constructed to transport axial air and eddying air,
- said outlet orifices being disposed radially outside said fuel outlet openings, wherein
- a radial distance of said combustion air outlet orifices with respect to a center point of said burner nozzle has a magnitude at least twice as great as a radius of said central opening of said flame stabilizer.
A burner utilization process comprising the steps of:
- discharging fuel through concentrically arranged a fuel conduit of annular cross section into a combustion zone,
- discharging a stream of primary air internally of said fuel and into said combustion znoe and through a central opening in a flame stabilizer located immediately upstream of said discharging of said fuel
- supplying at least a first stream and a second stream of air substantially coaxial with and radially external of said fuel conduit,
- supplying said first stream in an eddying flow pattern,
- supplying said second stream in a substantially axial direction radially external of said first stream, said second stream supplied in a substantially non-eddying flow pattern, and
- directing up to 20 percent of said primary air radially inwardly of said annular fuel supply to positively create an enlarged non-combination zone disposed adjacent a distal end of the burner and centrally aligned with respect to the burner.
Dependencies are inferred from the claim text.