Burner for internal centrifugal spinning

Abstract

The invention relates to an annular burner (10) for internal centrifugal spinning of glass fibers, comprising a combustion chamber (12), a housing (14) for the combustion chamber, a jet nozzle (18) and a supply system (20) for supplying the combustion chamber (12) with fuel in gaseous or liquid state and an oxidizing agent in gaseous state, wherein the oxidizing agent comprises dioxygen, and wherein the supply system (20) comprises a plurality of injectors (22) distributed around the combustion chamber (12) and opening into the combustion chamber (12), and a fuel distribution ring (24) for distributing fuel into the injectors (22), wherein the fuel distribution ring (24) comprises an inlet duct (26) for introducing fuel into the fuel distribution ring (24), and wherein the distribution ring (24) forms, together with the housing (14), a fuel distribution chamber (28), and wherein the fuel distribution chamber (28) is in direct fluid communication with at least two injectors (22) of the plurality of injectors.

Description

Technical Field

[0001] This disclosure relates to a burner for internal centrifugal fiberization (particularly internal centrifugal fiberization of glass fibers in the manufacture of glass wool). Background Technology

[0002] Mineral wool is known to be manufactured using a fibrous process. A fibrous process commonly used to produce glass fibers is known as internal centrifugation. This involves introducing a molten, stretchable web of material into a centrifuge, which includes a basket and a fibrous spinneret, both rotating at high speed. The fibrous spinneret may or may not have a bottom and has numerous openings drilled around its perimeter. Under centrifugal force, the material is expelled through these openings as filaments. These filaments are then subjected to a gaseous annular traction flow with high temperature and high speed (temperatures can reach 1000°C and speeds up to 250 m / s, depending on the desired product) by means of an annular burner. This traction flow travels along the centrifuge wall, which fines and transforms the material into fibers.

[0003] WO2023 / 186748 describes a burner for manufacturing mineral wool via internal centrifugal force. The burner includes multiple injectors for separately supplying fuel and oxidizer to the injectors, where the fuel and oxidizer are mixed to deliver the fuel / oxidizer mixture to the combustion chamber of the burner. One advantage of this separate supply is that it reduces energy consumption by preheating only the oxidizer.

[0004] However, the combustion of fuel (such as methane) and oxidizer (such as oxygen from the air) in a combustion chamber typically produces very large amounts of carbon dioxide. In addition, the reaction produces nitrogen oxides, sulfur oxides, carbon monoxide, and unburned hydrocarbons.

[0005] Since reducing greenhouse gas emissions is a major concern, reducing carbon dioxide emissions is one of the key areas for improvement in equipment used to manufacture mineral wool (especially glass wool), while ensuring the safety of these equipment. Summary of the Invention

[0006] This disclosure is intended to at least partially remedy these deficiencies.

[0007] For this purpose, the present disclosure relates to an annular burner for internal centrifugal fiberization of glass fiber, comprising a combustion chamber, a housing for the combustion chamber, injection nozzles, and a supply system for supplying the combustion chamber with gaseous or liquid fuel and gaseous oxidant, wherein the oxidant comprises dioxane, and wherein the supply system includes a plurality of injectors distributed around the combustion chamber and opening into the combustion chamber, and a fuel distribution ring for distributing fuel to the plurality of injectors, wherein the fuel distribution ring includes an inlet conduit for introducing fuel into the fuel distribution ring, and wherein the fuel distribution ring, together with the housing, forms a fuel distribution chamber, and wherein the fuel distribution chamber is in direct fluid communication with at least two of the plurality of injectors.

[0008] Since the burner is annular, it should be understood that the combustion chamber, casing, injection nozzle, supply system, fuel distribution ring, and fuel distribution chamber are also annular in shape.

[0009] "Ring" or "ring-shaped" refers to elements that have a roughly ring-shaped form, meaning they exist around the rotational symmetry axis of an annular burner. However, these elements may not be rotationally symmetric.

[0010] Since the distribution chamber is a fuel distribution chamber, it should be understood that the injector is configured to be supplied with fuel separately on the one hand and oxidizer separately on the other hand.

[0011] This type of separate injection can protect against backfire risk in the absence of an oxidizer / fuel mixture upstream of the injector, and preheats the oxidizer before injection, thereby improving combustion efficiency and reducing the flammability (ignition) limit of the mixture. Therefore, this can further reduce fuel consumption, which in turn reduces combustion gas (carbon dioxide) emissions. It should be noted that this preheating is prohibited in environments where fuel and oxidizer are premixed due to the risk of explosion.

[0012] The injectors are evenly distributed around the combustion chamber. This distribution ensures more uniform combustion within the combustion chamber.

[0013] The presence of a fuel distribution ring (which, together with the housing, forms a fuel distribution chamber, and is thus arranged around the combustion chamber housing) allows for a reduction in the number of pads in the combustion chamber supply system. In fact, since at least two injectors are directly supplied with fuel circulating in the fuel distribution chamber, the need for piping to supply each injector and pads connecting each piping to the fuel inlet and the injector can be eliminated.

[0014] In some embodiments, the fuel distribution chamber is in direct fluid communication with a plurality of injectors.

[0015] Oxidant is introduced into the combustion chamber, which supplies oxidant to all injectors. The number of pads is reduced, and the risk of oxidant leakage is also significantly decreased.

[0016] In some embodiments, the inlet pipe is arranged tangentially relative to the fuel distribution ring.

[0017] It should be understood that the inlet pipe has a main axis, and the main axis of the inlet pipe is arranged tangentially relative to the fuel distribution ring. Therefore, fuel enters the fuel distribution chamber tangentially.

[0018] This inlet pipe arrangement allows for faster and more stable distribution of oxidant flow in the fuel distribution chamber, and enables better distribution of oxidant across multiple injectors.

[0019] In some embodiments, the fuel distribution ring includes four inlet pipes.

[0020] The four inlet pipes are evenly distributed in the fuel distribution ring.

[0021] In some embodiments, the fuel distribution ring is a flange attached to the housing.

[0022] The flange is a ring-shaped flange.

[0023] In some embodiments, the flange is compressed and mounted on the housing.

[0024] Because the flange is compressed during installation, the risk of fuel leakage is reduced.

[0025] In some embodiments, the flange includes a body and an annular fastening lug, the thickness of the body being strictly greater than the thickness of the annular fastening lug, and the body axially abutting against the housing.

[0026] The main body and the annular fastening lug are integrated.

[0027] The annular fastening lug allows the flange to be fastened to the combustion chamber housing.

[0028] Because the thickness of the annular fastening lug is less than the thickness of the flange body, the annular fastening lug can deform slightly when the flange is mounted on the housing, thereby providing a better seal between the flange and the housing. The deformation of the annular fastening lug is within the elastic deformation range of the annular fastening lug.

[0029] Because the flange body has a thickness greater than the thickness of the annular fastening lug of the flange, the body can receive an opening for fastening the flange to the housing.

[0030] In some embodiments, the annular fastening lug includes an end for fastening the flange to the housing.

[0031] In some embodiments, the flange and the housing have contact surfaces that contact each other, and the contact surfaces have a roughness Ra of less than or equal to 1 μm, preferably less than or equal to 0.9 μm.

[0032] Roughness Ra is also known as arithmetic mean roughness. It is defined according to NF EN ISO 21920-2:2022 and measured according to NF EN ISO 21920-3:2022.

[0033] The distance between the contact surfaces of the separated housing, measured parallel to the axis of rotational symmetry, is strictly less than the distance between the contact surfaces of the separated flange, measured parallel to the axis of rotational symmetry.

[0034] Therefore, when the flange is mounted on the housing, the flange body abuts against the housing, and when the flange is fastened to the housing (e.g., by screws), the annular fastening lug deforms within its elastic range and increases the compressive force between the flange body and the housing.

[0035] In some embodiments, the fuel distribution ring includes a gasket receiving groove and a gasket.

[0036] The sealing gasket is received in the receiving groove.

[0037] As a non-limiting example, the gasket is a "C" shaped gasket.

[0038] In some embodiments, the annular burner includes an outer suction ring arranged around the fuel distribution ring.

[0039] The external suction ring circulates air around the fuel distribution ring and draws it away from the burner to prevent the presence of dihydrogen due to potential fuel leakage from the annular burner.

[0040] Because air circulates around the fuel distribution ring, any fuel leaks are diluted within the air circulating between the outer suction ring and the fuel distribution ring. This reduces the risk of fire and / or explosion due to fuel leaks.

[0041] The outer suction ring is configured to allow fuel containing dihydrogen to leak into the suction chamber defined by the outer suction ring and the fuel distribution ring.

[0042] It should be understood that the outer suction ring is arranged relative to the contact surfaces of the body and the shell.

[0043] In some embodiments, an outer suction ring is mounted around and at a distance from the fuel distribution ring, such that ambient air can be drawn into the outer suction ring, circulate around the flange, and be drawn back away from the burner to avoid fuel presence due to potential fuel leakage away from the annular burner.

[0044] Therefore, recirculated air is introduced between the fuel distribution ring and the external suction ring without the need for a complex air inlet device.

[0045] In some embodiments, the outer suction ring includes a gas detector.

[0046] This allows the detection of gas leaks (such as dihydrogen or methane) and the shutdown of the annular burner to prevent excessive fuel leakage.

[0047] As a non-limiting example, the gas detector may be located in the suction pipe of the outer suction ring.

[0048] In some embodiments, the annular burner includes two outer suction rings.

[0049] As a non-limiting example, the annular burner includes an upper outer suction ring and a lower outer suction ring. The upper outer suction ring is configured such that fuel leakage between the contact surface of the body and the contact surface of the casing flows into a suction chamber defined by the upper outer suction ring and the fuel distribution ring. The lower outer suction ring is configured such that fuel leakage between the contact surface of the annular fastening lug and the contact surface of the casing flows into a suction chamber defined by the lower outer suction ring and the fuel distribution ring.

[0050] Two external suction rings separate and identify fuel leaks between the contact surfaces of the body and the housing from fuel leaks between the contact surfaces of the annular fastening lugs and the housing.

[0051] In some embodiments, the fuel is gaseous and contains dihydrogen and / or methane.

[0052] In some embodiments, the fuel comprises dihydrogen.

[0053] Using oxidants containing dihydrogen reduces carbon dioxide emissions.

[0054] However, the use of dihydrogen may pose risks due to the leakage of unburned dihydrogen in the annular burner and its high flammability even when highly diluted in ambient air.

[0055] In some embodiments, the fuel has a dihydrogen content of greater than or equal to 5% by volume, for example, greater than or equal to 15% by volume, greater than or equal to 20% by volume, greater than or equal to 50% by volume, greater than or equal to 80% by volume, and greater than or equal to 90% by volume.

[0056] In some embodiments, the fuel comprises methane.

[0057] In some embodiments, the fuel is natural gas.

[0058] As a non-limiting example, natural gas contains between 85 and 95% by volume of methane.

[0059] In some embodiments, the fuel is biogas.

[0060] As a non-limiting example, biogas contains approximately 80% by volume methane.

[0061] In some embodiments, the fuel is a mixture of gases.

[0062] As a non-limiting example, dihydrogen can be mixed with another fuel, such as methane, natural gas, biogas, propane, or liquefied petroleum gas.

[0063] As a non-limiting example, the gas mixture can be a mixture of dihydrogen, carbon monoxide, carbon dioxide, and methane.

[0064] For example, a gas mixture may contain between 35 and 55% by volume dihydrogen, between 20 and 45% by volume carbon monoxide, between 5 and 25% by volume carbon dioxide, between 3 and 9% by volume methane, between 1.2 and 2% by volume water vapor, and unavoidable impurities.

[0065] In some embodiments, the fuel is dihydrogen.

[0066] It should be understood that fuel may contain impurities. Therefore, fuel contains dihydrogen, and the remainder consists of impurities. For example, fuel may contain 99.5% by volume of dihydrogen, or even 99.9% by volume of dihydrogen.

[0067] In some embodiments, the fuel is a liquid and contains ammonia and / or ethanol.

[0068] In some embodiments, the oxidant has a carbon dioxide content of greater than or equal to 10% by volume, for example, greater than or equal to 15% by volume.

[0069] In some embodiments, the oxidant is air.

[0070] In some embodiments, the injector is arranged radially relative to the combustion chamber.

[0071] It should be understood that the injector has a main axis, and the main axis of the injector is arranged along the radius of the combustion chamber.

[0072] In some embodiments, the injector includes an angle deflector configured to generate an oxidant flow with a vortex flow pattern.

[0073] In some embodiments, the angle deflector is an angle deflection ring coaxial with the injector, preferably removable, and includes a lateral conduit configured to allow the introduction of an oxidant.

[0074] Angular deflection refers to the injector's modification of the oxidizer's trajectory to create a vortex. This "vortex" flow is a helical flow with a non-negligible tangential or azimuth component, causing a pressure drop along the injector axis and creating an internal recirculation region. This internal recirculation region allows the flame to remain near the injector exit. In practice, this region is characterized by a high level of negative axial velocity. Flame holding is further enhanced by the presence of the annular recirculation region, which returns a portion of the combustion gases to the base of the combustion chamber, significantly preheating the fresh gases.

[0075] Because the flame is more stable, the amount of fuel injected into the combustion chamber can be reduced without the risk of flameout. This annular burner thus significantly improves combustion efficiency, especially in lean-burn operation where the fuel-to-oxidant ratio is low. Fuel consumption and associated CO2 emissions are therefore reduced for the same heating capacity. Furthermore, the extended operating range of the annular burner allows for greater flexibility in fiberized operating conditions. This allows for variations in the diameter and / or length of the glass fibers.

[0076] Finally, since the improved flame retention is attributable solely to the aerodynamic recirculation motion generated near the injector, the annular burner, as described above, exhibits improved durability over time compared to "blunt-body" burners, and is also compatible with premixed fuel and oxidizer injection, unlike "blunt-body" burners.

[0077] The removable nature of the angle deflection ring means that it can be replaced more easily and at a lower cost for maintenance purposes or to adapt the injector to a new operating range.

[0078] In some embodiments, the injector includes a central fuel injection pipe.

[0079] Central fuel injection allows for optimal mixing of oxidizer and fuel. Attached Figure Description

[0080] Further features and advantages of the subject matter of this disclosure will become apparent from the following description of embodiments given by way of non-limiting example, with reference to the accompanying drawings.

[0081] Figure 1 This is a schematic cross-sectional view of a semi-burner according to one embodiment.

[0082] Figure 2 This is a schematic perspective view of a fuel distribution ring according to one embodiment.

[0083] Figure 3 It is along Figure 2 A schematic cross-sectional view of plane III in the diagram.

[0084] Figure 4 It is along Figure 2 A schematic cross-sectional view of plane IV in the diagram.

[0085] Figure 5 yes Figure 1 A schematic diagram of detail V in the diagram.

[0086] Figure 6 yes Figure 1 A schematic diagram of detail VI in the diagram.

[0087] Figure 7 yes Figure 1 A schematic diagram of detail VII in the diagram.

[0088] Figure 8 This is a partial schematic diagram of an annular burner including two external suction rings.

[0089] Figure 9 This is a schematic perspective view of an injector according to one embodiment.

[0090] In all the accompanying drawings, common elements are identified by the same numerical designations. Detailed Implementation

[0091] In the following text, common elements in different embodiments are identified by the same numerical designations.

[0092] Figure 1 This is a schematic cross-sectional view of an annular burner 10 according to an embodiment of the present invention. Figure 1 A cross-section of the annular semi-burner 10 is shown. The annular burner 10 includes a rotationally symmetric X-axis. The annular burner 10 is an annular burner for internal centrifugal fiberization of glass fibers.

[0093] exist Figure 1 In the embodiment shown, the annular burner 10 includes a combustion chamber 12. The combustion chamber 12 is annular in shape, meaning it forms a ring around the X-axis. The combustion chamber 12 is defined by a refractory material 16 contained within a housing 14.

[0094] As a non-limiting example, the housing 14 is made of metal, such as stainless steel, especially austenitic stainless steel, particularly austenitic stainless steel sold under the name INOX 316L.

[0095] In the following text, the terms “external” and “internal” are defined relative to their proximity to the rotationally symmetric X-axis, and the terms “upper” and “lower” are defined relative to the annular burner 10 located in operation or within the internal centrifugal fiberizing unit.

[0096] exist Figure 1In the embodiment shown, the housing 14 is annular and includes an outer housing 14A, an inner housing 14B, and an upper housing 14C. The housing 14 includes cooling devices (not shown) for the annular burner 10.

[0097] exist Figure 1 In the embodiment shown, the combustion chamber 12 opens onto the injection nozzle 18. The injection nozzle 18 is annular in shape.

[0098] As a non-limiting example, the spray nozzle 18 is made of metal, such as stainless steel, especially austenitic stainless steel, particularly austenitic stainless steel sold under the name INOX 316L.

[0099] exist Figure 1 In the embodiment shown, the annular burner 10 includes a combustion chamber 12 supply system 20 for gaseous fuel 54 and gaseous oxidant 52. Fuel 54 contains dihydrogen, and oxidant 52 contains dioxygen.

[0100] As a non-limiting example, the fuel has a dihydrogen content of 5% or more by volume, for example, 15% or more by volume, 20% or more by volume, or 50% or more by volume.

[0101] As a non-limiting example, dihydrogen can be mixed with another oxidant, such as methane, biogas, propane, or liquefied petroleum gas.

[0102] exist Figure 1 In the examples shown, the fuel is dihydrogen; for example, the fuel contains 99.9% by volume dihydrogen, with the remainder being impurities.

[0103] As a non-limiting example, the oxidant has a dihydrogen content of greater than or equal to 10% by volume, for example, greater than or equal to 15% by volume.

[0104] exist Figure 1 In the examples shown, the oxidant is air.

[0105] The injection nozzle 18 injects the gas produced by the combustion of fuel 54 and oxidant 52 in the combustion chamber 12.

[0106] exist Figure 1 In the embodiment shown, the supply system 20 includes a plurality of injectors 22, which are evenly distributed around the combustion chamber 12 and open into the combustion chamber 12.

[0107] As a non-limiting example, the injector 22 is made of metal, such as stainless steel, especially austenitic stainless steel, particularly austenitic stainless steel sold under the name INOX 316L.

[0108] exist Figure 1In the embodiment shown, the injectors 22 are arranged radially relative to the combustion chamber 12, i.e., each injector 22 has a main axis A (in Figure 9 (as shown in the image), and the main axis A is arranged along the radius of the combustion chamber 12.

[0109] exist Figure 1 In the embodiment shown, the housing 14, and particularly the outer casing 14A, includes a plurality of injection channels 14A3. Each injection channel 14A3, together with the injector 22, forms a chamber for circulating the oxidizer 52 to the combustion chamber 12.

[0110] exist Figure 1 In the embodiment shown, the supply system 20 includes a fuel distribution ring 24 in the injector 22, the fuel distribution ring 24 forming a fuel distribution chamber 28 together with the housing 14, the fuel distribution chamber 28 being in direct fluid communication with at least two injectors 22.

[0111] As a non-limiting example, the fuel distribution ring 24 is made of metal, such as stainless steel, especially austenitic stainless steel, particularly austenitic stainless steel sold under the name INOX 316L.

[0112] exist Figure 1 In the embodiment shown, the fuel distribution chamber 28 is in direct fluid communication with a plurality of injectors 22, that is, in direct fluid communication with all of the plurality of injectors 22. The fuel distribution chamber 28 is annular in shape.

[0113] exist Figure 1 In the embodiment shown, the injector 22 is configured to be supplied with fuel 54 separately on one hand and oxidant 52 separately on the other hand.

[0114] exist Figure 1 In the embodiments shown, and as Figure 9 As shown, injector 22 includes a central injection conduit 58 for fuel 54 and an angle deflector 50. The angle deflector 50 is an angle deflection ring coaxial with the main axis A of injector 22.

[0115] exist Figure 9 In the embodiment shown, the angle deflector 50 includes a plurality of lateral conduits 56 configured to allow the introduction of oxidant 52.

[0116] exist Figure 1 In the embodiment shown, the supply system 20 includes an oxidant distribution ring 32 that opens into an oxidant distribution chamber 34. The oxidant distribution chamber 34 is annular in shape.

[0117] As a non-limiting example, the oxidant distribution ring 32 is made of metal, such as stainless steel, especially austenitic stainless steel, particularly austenitic stainless steel sold under the name INOX 316L.

[0118] exist Figure 1 In the embodiment shown, an oxidant distribution chamber 34 is formed in the housing 14.

[0119] exist Figure 2 In the embodiment shown, the fuel distribution ring 24 includes four fuel inlet pipes 26 evenly distributed in the fuel distribution ring 24.

[0120] exist Figure 2 In the embodiment shown, the inlet pipes 26 are arranged tangentially relative to the fuel distribution ring 24, i.e., each inlet pipe 26 has a main axis, and the main axis of each inlet pipe 26 is arranged tangentially relative to the fuel distribution ring 24.

[0121] exist Figure 2 In the embodiment shown, each inlet pipe 26 includes an inlet end 26A and an outlet end 26B, with the outlet end 26B opening into the fuel distribution chamber 28.

[0122] exist Figure 1 and Figure 2 In the embodiment shown, the fuel distribution ring 24 is a flange 30 attached to the housing 14. The flange 30 is annular in shape.

[0123] exist Figure 1 In the embodiment shown, the flange 30 is compressed and mounted on the housing 14.

[0124] exist Figure 1 and Figure 2 In the embodiment shown, the flange 30 includes a body 30A and an annular fastening lug 30B. The body 30A and the annular fastening lug 30B are integral. Figure 3 and Figure 4 As shown, the thickness E1 of the body 30A is strictly greater than the thickness E2 of the annular fastening lug 30B.

[0125] exist Figure 1 In the embodiment shown, the body 30A abuts against the housing 14.

[0126] exist Figure 1 and Figure 2 In the embodiment shown, the annular fastening lug 30B includes an end 30C for fastening the flange 30 to the housing 14.

[0127] exist Figure 1 In the embodiment shown, the flange 30 and the housing 14 have contact surfaces that contact each other, and the contact surfaces have a roughness Ra of 1 μm or less.

[0128] exist Figure 1 In the embodiments shown, and as Figure 5 As shown, the contact surface 30A1 of the body 30A abuts against the contact surface 14A1 of the housing 14 and thus contacts the contact surface 14A1 of the housing 14, and the contact surface 30B1 of the annular fastening lug 30B (in particular the fastening end 30C of the annular fastening lug 30B) contacts the contact surface 14A2 of the housing 14.

[0129] Since the flange 30 is compressed and mounted on the housing 14, it should be understood that... Figure 1 In the embodiments shown, and as Figure 5 As shown, the distance between the contact surfaces 14A1 and 14A2 of the separation housing 14, measured parallel to the X-axis, is strictly less than the distance between the contact surfaces 30A1 and 30A2 of the separation body 30A (and therefore the fuel distribution ring 24), measured parallel to the X-axis.

[0130] exist Figure 1 In the embodiment shown, the annular fastening lug 30B (particularly the fastening end 30C) is used to fasten the flange 30 to the housing 14 of the combustion chamber 12, for example by a screw passing through the fastening opening 38 in the annular fastening lug 30B.

[0131] exist Figure 1 In the embodiment shown, the fastening opening 38 in the annular fastening lug 30B is provided in the fastening end 30C of the annular fastening lug 30B.

[0132] Therefore, when the flange 30 is assembled and fastened to the housing 14, by fastening the annular fastening lug 30B (especially the fastening end 30C of the annular fastening lug 30B) to the housing 14, the contact surface 30A1 of the body 30A abuts against and presses against the contact surface 14A1 of the housing 14 (especially the outer shell 14A). Since the distance between the contact surfaces 30A1 and 30A2 separating the body 30 is strictly greater than the distance between the contact surfaces 14A1 and 14A2 separating the housing 14, the annular fastening lug 30B deforms within its elastic range.

[0133] exist Figure 2 and Figure 3 In the embodiment shown, since the body 30A of the flange 30 has a thickness E1 greater than the thickness E2 of the annular fastening lug 30B of the flange 30, the body 30A can accommodate a fastening opening 36 for fastening the flange 30 to the housing 14 (in particular, for fastening the body 30A to the housing 14).

[0134] exist Figures 3 to 8 In the embodiment shown, the flange 30 includes a receiving groove 40 for a sealing gasket and a sealing gasket 42 received in the groove 40.

[0135] exist Figures 3 to 8In the embodiment shown, the flange 30 includes two receiving grooves 40, the first groove opening onto the contact surface 30A1 of the body 30A, and the second receiving groove 40 opening onto the contact surface 30B1 of the annular fastening lug 30B.

[0136] exist Figure 1 In the embodiment shown, the annular burner 10 includes an outer suction ring 44. The outer suction ring 44 is arranged around the fuel distribution ring 24.

[0137] In particular, Figure 1 In the embodiments, and as Figure 6 and Figure 7 As shown, the outer suction ring 44 is installed at a distance from the fuel distribution ring 24, so that ambient air can be drawn in through the air inlet 46 in the outer suction ring 44, circulate around the fuel distribution ring 24 (i.e., flange 30), and be drawn out to be discharged away from the burner and / or directed to the dihydrogen capture device.

[0138] The outer suction ring 44 is configured to allow fuel containing dihydrogen to leak into the suction chamber defined by the outer suction ring 44 and the fuel distribution ring 24.

[0139] The outer suction ring 44 may include a dihydrogen sensor.

[0140] As a non-restrictive example, and as Figure 8 As shown, the dihydrogen sensor can be arranged in the suction pipe 48 of the external suction ring 44.

[0141] exist Figure 8 In the embodiment shown, the annular burner 10 includes two outer suction rings 44, namely an upper outer suction ring 44A and a lower outer suction ring 44B.

[0142] exist Figure 8 In the embodiment shown, the upper outer suction ring 44A is configured such that a hydrogen-containing fuel leak between the contact surface 30A1 of the body 30A and the contact surface 14A1 of the housing 14 flows into the suction chamber defined by the upper outer suction ring 44A and the fuel distribution ring 24. The lower outer suction ring 44B is configured such that a hydrogen-containing fuel leak between the contact surface 30B1 of the annular fastening lug 30B and the contact surface 14A2 of the housing 14 flows into the suction chamber defined by the lower outer suction ring 44B and the fuel distribution ring 24.

[0143] The two external suction rings 44A and 44B allow fuel leakage between the contact surface 30A1 of the body 30A and the contact surface 14A1 of the housing 14 to be separated from fuel leakage between the contact surface 30B1 of the annular fastening lug 30B and the contact surface 14A2 of the housing 14.

[0144] Although Figure 8Not shown, but the outer suction ring 44A has a suction pipe for drawing in and discharging air that has circulated through the outer suction ring 44A away from the annular burner and / or into the dihydrogen capture device.

[0145] exist Figure 8 In the embodiment shown, the upper outer suction ring 44A and the lower outer suction ring 44B are mounted at a distance from the fuel distribution ring 24, so that ambient air can be drawn in through the air inlets 46 in the upper outer suction ring 44A and the lower outer suction ring 44B.

[0146] In some embodiments, the injector includes an angle deflector adapted to generate an oxidant vortex flow.

[0147] While this disclosure has been described with reference to specific exemplary embodiments, it will be apparent that various modifications and variations can be made to these examples without departing from the overall scope of the invention as defined by the claims. Furthermore, various features of the above-mentioned embodiments can be combined in other embodiments. Therefore, the description and drawings should be considered illustrative rather than restrictive.

Claims

1. An annular burner (10) for internal centrifugal fiberization of glass fiber, comprising a combustion chamber (12), a housing (14) for the combustion chamber, an injection nozzle (18), and a supply system (20) for supplying the combustion chamber (12) with gaseous or liquid fuel and gaseous oxidant, wherein the oxidant comprises dioxane, and wherein the supply system (20) comprises a plurality of injectors (22) distributed around and opening into the combustion chamber (12), and a fuel distribution ring (24) for distributing the fuel to the injectors (22), wherein the fuel distribution ring (24) includes an inlet pipe (26) for introducing the fuel into the fuel distribution ring (24), and wherein the distribution ring (24) together with the housing (14) forms a fuel distribution chamber (28), and wherein the fuel distribution chamber (28) is in direct fluid communication with at least two of the plurality of injectors (22).

2. The annular burner (10) according to claim 1, wherein the fuel distribution chamber (28) is in direct fluid communication with the plurality of injectors (22).

3. The annular burner (10) according to claim 1 or 2, wherein the inlet pipe (26) is arranged tangentially relative to the fuel distribution ring (24).

4. The annular burner (10) according to any one of claims 1 to 3, wherein the fuel distribution ring (24) is a flange (30) attached to the housing (14).

5. The annular burner (10) according to claim 4, wherein the flange (30) is compressed and mounted on the housing (14).

6. The annular burner (10) according to claim 4 or 5, wherein the flange (30) comprises a body (30A) and an annular fastening lug (30B), the thickness (E1) of the body (30A) being strictly greater than the thickness (E2) of the annular fastening lug (30B), and the body (30A) abutting against the housing (14).

7. The annular burner (10) according to any one of claims 4 to 6, wherein the flange (30) and the housing (14) have contact surfaces that contact each other, the contact surfaces having a roughness Ra of less than or equal to 1 μm, preferably less than or equal to 0.9 μm.

8. The annular burner (10) according to any one of claims 1 to 7, wherein the fuel distribution ring (24) comprises a gasket receiving groove (40) and a gasket (42).

9. The annular burner (10) according to any one of claims 1 to 8, comprising an outer suction ring (44) arranged around the fuel distribution ring (24).

10. The annular burner (10) according to any one of claims 1 to 9, wherein the fuel (54) is in a gaseous state and contains dihydrogen and / or methane.

11. The annular burner (10) according to any one of claims 1 to 10, wherein the fuel (54) is a liquid and contains ammonia and / or ethanol.

12. The annular burner (10) according to any one of claims 1 to 11, wherein the oxidant (52) is air.

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