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US 12,631,326 B2Granted
Burner and method of operation
AssigneeAir Products and Chemicals, Inc.
InventorsMark Daniel D'Agostini, Anandkumar Makwana, Joshua E. Middaugh
Life of this patent
Estimating the term…
Abstract
The invention relates to particular burners, particularly to non-premixed or partially-premixed dual-fuel burners with flexibility to change the heat input from the two fuels. Accordingly, said burners may be used in applications that needs operation of a burner in both single-fuel, and/or duel-fuel mode depending on furnace operation needs. The invention further relates to furnaces including the burners and methods of operating the burners.
Claims14
A burner (1), comprising
- a primary fuel conduit (20) comprising a primary fuel outlet (22) having a multiplicity of primary fuel exit holes (23) for supply of a primary fuel into an ignition chamber (25), wherein a wall surrounding the ignition chamber (25) comprises a plurality of bleed holes (28),
- a main oxidant conduit (30) for supply of a main oxidant, comprising an intermediate annular conduit (35) in a downstream portion (5) of the burner, which intermediate annular conduit (35) is configured to allow splitting of the main oxidant, such that a first portion is introduced into the ignition chamber (25) via the plurality of bleed holes (28) to mix with the primary fuel, and a second portion is introduced into a swirler section (33),
- a secondary fuel conduit (40) for supply of a secondary fuel, having a secondary fuel outlet (44) at its downstream end,
- wherein at least in the downstream portion (5) of the burner (1), in which primary fuel outlet (22), ignition chamber (25), intermediate annular conduit (35) and secondary fuel outlet (44) are present, the primary fuel conduit (20) is surrounded by the main oxidant conduit (30) and the secondary fuel conduit (40);
- wherein the ignition chamber (25) is positioned within the primary fuel conduit (20), and is extending from the primary fuel outlet (22) to the primary fuel conduit end plane (24), wherein the primary fuel conduit wall (29) is surrounding the ignition chamber (25) and comprises the plurality of bleed holes (28);
- wherein the burner further comprises an ignition source (10), which terminates in the ignition chamber (25), wherein the main axis (2) of the burner (1) preferably coincides with the central axis (15) of the ignition source (10);
- and
- wherein the burner (1) further comprises a turbulence generator (47) in the secondary fuel conduit (40).
5 more elements
A burner (1), comprising
- a primary fuel conduit (20) comprising a primary fuel outlet (22) having a multiplicity of primary fuel exit holes (23) for supply of a primary fuel into an ignition chamber (25), wherein a wall surrounding the ignition chamber (25) comprises a plurality of bleed holes (28),
- a main oxidant conduit (30) for supply of a main oxidant, comprising an intermediate annular conduit (35) in a downstream portion (5) of the burner, which intermediate annular conduit (35) is configured to allow splitting of the main oxidant, such that a first portion is introduced into the ignition chamber (25) via the plurality of bleed holes (28) to mix with the primary fuel, and a second portion is introduced into a swirler section (33),
- a secondary fuel conduit (40) for supply of a secondary fuel, having a secondary fuel outlet (44) at its downstream end,
- wherein at least in the downstream portion (5) of the burner (1), in which primary fuel outlet (22), ignition chamber (25), intermediate annular conduit (35) and secondary fuel outlet (44) are present, the primary fuel conduit (20) is surrounded by the main oxidant conduit (30) and the secondary fuel conduit (40),
- wherein the ignition chamber (25) is extending from the primary fuel outlet (22) to the intermediate annular conduit exit plane (56), wherein the wall surrounding the ignition chamber (25) comprises at least two (preferably two or three) steps of annular conduits with increasing radial extension, each of which comprises the plurality of bleed holes (28).
2 more elements
A burner (1), comprising
- a primary fuel conduit (20) comprising a primary fuel outlet (22) having a multiplicity of primary fuel exit holes (23) for supply of a primary fuel into an ignition chamber (25), wherein a wall surrounding the ignition chamber (25) comprises a plurality of bleed holes (28),
- a main oxidant conduit (30) for supply of a main oxidant, comprising an intermediate annular conduit (35) in a downstream portion (5) of the burner, which intermediate annular conduit (35) is configured to allow splitting of the main oxidant, such that a first portion is introduced into the ignition chamber (25) via the plurality of bleed holes (28) to mix with the primary fuel, and a second portion is introduced into a swirler section (33),
- a secondary fuel conduit (40) for supply of a secondary fuel, having a secondary fuel outlet (44) at its downstream end,
- wherein at least in the downstream portion (5) of the burner (1), in which primary fuel outlet (22), ignition chamber (25), intermediate annular conduit (35) and secondary fuel outlet (44) are present, the primary fuel conduit (20) is surrounded by the main oxidant conduit (30) and the secondary fuel conduit (40),
- wherein the burner (1) is configured in such a way that
- i) the velocity of the primary fuel is between 30 ft/s and 500 ft/s, particularly between 40 ft/s and 400 ft/s;
- and/or
- ii) the velocity of the main oxidant is between 5 ft/s and 300 ft/s, particularly between 10 ft/s and 200 ft/s;
- and/or
- iii) the velocity of the secondary fuel is between 20 ft/s and 200 ft/s, particularly between 40 ft/s and 120 ft/s.
7 more elements
A burner (1), comprising
- a primary fuel conduit (20) comprising a primary fuel outlet (22) having a multiplicity of primary fuel exit holes (23) for supply of a primary fuel into an ignition chamber (25), wherein a wall surrounding the ignition chamber (25) comprises a plurality of bleed holes (28),
- a main oxidant conduit (30) for supply of a main oxidant, comprising an intermediate annular conduit (35) in a downstream portion (5) of the burner, which intermediate annular conduit (35) is configured to allow splitting of the main oxidant, such that a first portion is introduced into the ignition chamber (25) via the plurality of bleed holes (28) to mix with the primary fuel, and a second portion is introduced into a swirler section (33),
- a secondary fuel conduit (40) for supply of a secondary fuel, having a secondary fuel outlet (44) at its downstream end,
- wherein at least in the downstream portion (5) of the burner (1), in which primary fuel outlet (22), ignition chamber (25), intermediate annular conduit (35) and secondary fuel outlet (44) are present, the primary fuel conduit (20) is surrounded by the main oxidant conduit (30) and the secondary fuel conduit (40),
- wherein the secondary fuel conduit (40) is in proximity with the main oxidant conduit (30),
- preferably wherein the inner diameter of the secondary fuel conduit (40) is defined as D5;
- the inner diameter of the main oxidant conduit (30) is defined as D4;
- and D5/D4 is between 1.05 and 1.40, more preferably between 1.1 and 1.25.
5 more elements
Dependencies are inferred from the claim text.