CN221005056U - Non-premixed diffusion burner - Google Patents
Non-premixed diffusion burner Download PDFInfo
- Publication number
- CN221005056U CN221005056U CN202322605973.5U CN202322605973U CN221005056U CN 221005056 U CN221005056 U CN 221005056U CN 202322605973 U CN202322605973 U CN 202322605973U CN 221005056 U CN221005056 U CN 221005056U
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- Prior art keywords
- shell
- air
- porous metal
- glass bead
- fuel
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 47
- 239000011324 bead Substances 0.000 claims abstract description 41
- 239000011521 glass Substances 0.000 claims abstract description 41
- 239000000446 fuel Substances 0.000 claims abstract description 39
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 239000011148 porous material Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 239000002737 fuel gas Substances 0.000 abstract description 11
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Gas Burners (AREA)
Abstract
The utility model discloses a non-premixed diffusion burner, which belongs to the technical field of diffusion burners and comprises a shell, wherein a glass bead layer is arranged at the inner bottom of the shell, a porous metal medium layer is arranged above the glass bead layer, a fuel hole is arranged in the center of the bottom surface of the shell, a fuel conduit is hermetically arranged in the fuel hole, the fuel conduit sequentially penetrates through the glass bead layer and the porous metal medium layer, an air hole is arranged at one side of the bottom surface of the shell, an air conduit is hermetically arranged in the air hole, and the upper end of the air conduit is in contact with the glass bead layer; the upper port of the shell is provided with a detachable compression ring, the inner cavity of the compression ring is provided with a step, after the compression ring is assembled with the shell, the bottom surface of the step is contacted with the upper port of the shell, and the bottom surface of the step is contacted with the upper surface of the porous metal medium layer. Through the arrangement of the glass bead layer, air is rectified through the glass bead layer and then is rectified through the porous metal medium layer, so that the contact quality of the air and fuel gas is ensured, and more uniform and stable air flow can be formed.
Description
Technical Field
The utility model belongs to the technical field of diffusion combustors, and particularly relates to a non-premixed diffusion combustor.
Background
A diffusion burner is a burner designed according to the principle of diffusion combustion. The fuel of the diffusion burner is sprayed into the hearth by the gas spray head, and the combustion air is mixed with the fuel and burned in the hearth. The diffusion burner has the characteristics of stable combustion, no backfire problem, reliable operation, simple structure, low-pressure fuel gas utilization and wide market prospect. In order to ensure that the fuel gas and the air are mixed well, the diffusion burner is designed to enlarge the contact surface of the fuel gas and the air as much as possible so as to ensure that the fuel gas and the air are mixed well. In general, in order to ensure that air and fuel gas are fully contacted, the air is designed to pass through a porous medium structure before being contacted with the fuel gas, and the temperature of a combustion area of a burner added with the porous medium tends to be uniform due to the existence of three heat exchange modes of convection, heat conduction and radiation, so that a relatively stable temperature gradient can be maintained. For this purpose, it is necessary to design a non-premixed diffusion burner.
It should be noted that the information disclosed in the above background section is only for enhancing the understanding of the background of the present disclosure, and thus may include information that does not constitute prior art.
Disclosure of utility model
The inventor finds that the air is usually guided by the gas transmission pipeline and then directly contacted with the porous medium, so that the contact quality between each region of the air inlet end of the porous medium and the air is often uneven, the air flow quality of the air outlet end of the porous medium is further influenced, and the diffusion combustor cannot realize the full and even contact between the air and the fuel gas.
In view of at least one of the above technical problems, the present disclosure provides a non-premixed diffusion burner, which has the following specific technical scheme:
The non-premixed diffusion burner comprises a shell with a cup-like structure, wherein a glass bead layer is arranged at the inner bottom of the shell, a porous metal medium layer is arranged above the glass bead layer, a fuel hole is formed in the center of the bottom surface of the shell, a fuel guide pipe is hermetically arranged in the fuel hole, the fuel guide pipe sequentially penetrates through the glass bead layer and the porous metal medium layer, an air hole is formed in one side of the bottom surface of the shell, an air guide pipe is hermetically arranged in the air hole, and the upper end of the air guide pipe is in contact with the glass bead layer; the upper port of the shell is provided with a detachable pressure ring, the inner cavity of the pressure ring is provided with a step, after the pressure ring is assembled with the shell, the bottom surface of the step is contacted with the upper port of the shell, and the bottom surface of the step is contacted with the upper surface of the porous metal medium layer.
In some embodiments of the disclosure, the housing is a refractory metal shell, the pressure ring is a refractory metal ring, the fuel conduit is a refractory metal straight tube, and the housing is welded to the fuel conduit.
In some embodiments of the disclosure, the fuel conduit includes a tube fitting disposed at an outer end.
In some embodiments of the present disclosure, the air conduit includes a transition joint provided at an inner end, through which the air conduit interfaces with the air hole.
In some embodiments of the present disclosure, the upper end of the fuel conduit is above the upper surface of the porous metal media layer.
In some embodiments of the disclosure, the upper end of the fuel conduit is not higher than the upper surface of the pressure ring after the pressure ring is assembled with the housing.
In some embodiments of the present disclosure, the glass bead layer is comprised of a plurality of glass beads of different particle sizes ranging from 1.5mm to 5mm.
In some embodiments of the present disclosure, the porous metal dielectric layer has a pore size of 0.5 to 0.7mm.
In some embodiments of the present disclosure, the porous metal dielectric layer has a pore size of 0.64mm.
In some embodiments of the disclosure, an external thread is provided on an outer side surface of the upper port of the housing, and an internal thread matched with the external thread is provided on an inner wall of the compression ring.
Compared with the prior art, the utility model has the following beneficial effects:
Through the arrangement of the glass bead layer, before the air is contacted with the porous metal medium layer, the air is rectified through the glass bead layer and then subjected to secondary rectification through the porous metal medium layer, so that the contact quality of the air and fuel gas is ensured, and more uniform and stable air flow can be formed;
The glass bead layer has low cost, so that the material consumption of the porous metal medium layer can be reduced to a certain extent, and the production cost is saved;
The structure of the design is visual, the assembly is convenient, and complicated transmission cooperation does not exist, thereby bringing new technical revenues for the design of the diffusion burner.
Drawings
FIG. 1 is a perspective view of embodiment 3 of the structure of the present utility model;
FIG. 2 is a front view of embodiment 3 in the structure of the present utility model;
FIG. 3 is a schematic view in partial cross-section of FIG. 2;
The reference numerals in the figures illustrate: 1. a housing; 2. a glass bead layer; 3. a porous metal dielectric layer; 4. a fuel conduit; 41. a pipe joint; 5. an air duct; 51. a conversion joint; 6. a compression ring; 61. a step.
Detailed Description
For a better understanding of the objects, structures and functions of the present utility model, reference should be made to the accompanying drawings in which embodiments of the utility model are shown, and in which it is apparent that some, but not all embodiments of the utility model are described.
The component parts themselves are numbered herein only to distinguish between the stated objects and do not have any sequential or technical meaning. In this disclosure, the term "coupled" includes both direct and indirect, "as used herein, unless specifically indicated otherwise. In the description of the present application, it should be understood that the azimuth or positional relationship indicated by the azimuth terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the azimuth or positional relationship shown in the drawings, are for convenience of description only, and do not indicate or imply that the apparatus or unit referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application.
As shown in fig. 1 to 3 of the drawings, a non-premixed diffusion burner is designed, and comprises a shell 1 with a cup-like structure, wherein a glass bead layer 2 is arranged at the inner bottom of the shell 1, a porous metal medium layer 3 is arranged above the glass bead layer 2, a fuel hole is arranged in the center of the bottom surface of the shell 1, a fuel conduit 4 is hermetically arranged at the fuel hole, the fuel conduit 4 sequentially penetrates through the glass bead layer 2 and the porous metal medium layer 3, an air hole is arranged at one side of the bottom surface of the shell 1, an air conduit 5 is hermetically arranged at the air hole, and the upper end of the air conduit 5 is in contact with the glass bead layer 2; the upper port of the shell 1 is provided with a detachable pressure ring 6, the inner cavity of the pressure ring 6 is provided with a step 61, after the pressure ring 6 is assembled with the shell 1, the bottom surface of the step 61 is contacted with the upper port of the shell 1, and the bottom surface of the step 61 is contacted with the upper surface of the porous metal medium layer 3; through the arrangement of the glass bead layer 2, before air is contacted with the porous metal medium layer 3, the air is rectified through the glass bead layer 2 and then is rectified through the porous metal medium layer 3 for the second time, so that the contact quality of the air and fuel gas is ensured, and more uniform and stable air flow can be formed; the glass bead layer 2 has low cost, so that the material consumption of the porous metal medium layer 3 can be reduced to a certain extent, and the production cost is saved; the structure of the design is visual, the assembly is convenient, and complicated transmission cooperation does not exist, thereby bringing new technical revenues for the design of the diffusion burner.
In the above embodiments, three embodiments are listed to implement the above technical solutions:
The first embodiment discloses a non-premixed diffusion burner, which comprises a shell 1 with a cup-like structure, wherein an inner cavity of the shell 1 is used as an air rectifying chamber, a glass bead layer 2 is arranged at the inner bottom of the shell 1, a porous metal medium layer 3 is arranged above the glass bead layer 2, a fuel hole is arranged at the center of the bottom surface of the shell 1, a fuel conduit 4 is hermetically arranged at the fuel hole, the fuel conduit 4 sequentially penetrates through the glass bead layer 2 and the porous metal medium layer 3, an air hole is arranged at one side of the bottom surface of the shell 1, an air conduit 5 is hermetically arranged at the air hole, and the upper end of the air conduit 5 is in contact with the glass bead layer 2; the upper port of the shell 1 is provided with a detachable pressure ring 6, the inner cavity of the pressure ring 6 is provided with a step 61, after the pressure ring 6 is assembled with the shell 1, the bottom surface of the step 61 is contacted with the upper port of the shell 1, and the bottom surface of the step 61 is contacted with the upper surface of the porous metal medium layer 3; through the arrangement of the glass bead layer 2, before air is contacted with the porous metal medium layer 3, the air is rectified through the glass bead layer 2 and then is rectified through the porous metal medium layer 3 for the second time, so that the contact quality of the air and fuel gas is ensured, and more uniform and stable air flow can be formed; the glass bead layer 2 has low cost, so that the material consumption of the porous metal medium layer 3 can be reduced to a certain extent, and the production cost is saved; the design structure is visual, the assembly is convenient, and complicated transmission coordination does not exist, so that new technical revenues are brought to the design of the diffusion combustor;
The shell 1 is a high-temperature-resistant metal shell, the compression ring 6 is a high-temperature-resistant metal ring, the fuel conduit 4 is a high-temperature-resistant metal straight pipe, and the shell 1 and the fuel conduit 4 are welded and fixed; in this embodiment, the glass bead layer 2 is composed of a plurality of glass beads with a particle size of 1.5mm to 5mm; the pore diameter of the porous metal medium layer 3 is 0.5-0.7 mm, and in the embodiment, the pore diameter of the porous metal medium layer 3 is 0.5mm; the outer side face of the shell 1 is provided with a through hole, the outer side face of the compression ring 6 is provided with a bolt hole, and the through hole and the bolt hole are fastened through a fastener to realize connection and fixation.
The second embodiment is to disclose a non-premixed diffusion burner, the difference between this embodiment and the first embodiment is that the fuel conduit 4 includes a pipe joint 41 disposed at the outer end, the air conduit 5 includes a conversion joint 51 disposed at the inner end, the air conduit 5 is in butt joint with the air hole through the conversion joint 51, so as to be convenient for being connected with an air supply system, in this embodiment, the glass bead layer 2 is composed of a plurality of glass beads with different particle diameters of 1.5 mm-5 mm, and the plurality of glass beads with different particle diameters can make the ventilation path more diversified, and further ensure the rectifying effect; the pore diameter of the porous metal medium layer 3 is 0.5-0.7 mm, and in the embodiment, the pore diameter of the porous metal medium layer 3 is 0.7mm; the outer side face of the shell 1 is provided with a guide chute, the outer side face of the pressing ring 6 is provided with a sliding block matched with the guide chute, and the sliding block is fixedly connected with the guide chute in a fastening fit mode.
As shown in fig. 1 to 3, the third embodiment discloses a non-premixed diffusion burner, which is different from the second embodiment in that the upper end of the fuel conduit 4 is higher than the upper surface of the porous metal medium layer 3, so that the combustion position of flame can be ensured to be slightly higher than the upper surface of the porous metal medium layer 3, and the porous metal medium layer 3 can obtain a relatively long service life; the outer side surface of the upper port of the shell 1 is provided with external threads, the inner wall of the pressure ring 6 is provided with internal threads matched with the external threads, and after the pressure ring 6 and the shell 1 are fully screwed and assembled, the upper end of the fuel conduit 4 is not higher than the upper surface of the pressure ring 6, so that the upper end of the fuel conduit 4 is prevented from being damaged by collision during operation; the pore diameter of the porous metal medium layer 3 is 0.5-0.7 mm, and in this embodiment, the pore diameter of the porous metal medium layer 3 is 0.64mm.
It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The non-premixed diffusion burner is characterized by comprising a shell (1) with a cup-like structure, wherein a glass bead layer (2) is arranged at the inner bottom of the shell (1), a porous metal medium layer (3) is arranged above the glass bead layer (2), a fuel hole is formed in the center of the bottom surface of the shell (1), a fuel conduit (4) is hermetically arranged in the fuel hole, the fuel conduit (4) sequentially penetrates through the glass bead layer (2) and the porous metal medium layer (3), an air hole is formed in one side of the bottom surface of the shell (1), an air conduit (5) is hermetically arranged in the air hole, and the upper end of the air conduit (5) is in contact with the glass bead layer (2); the detachable compression ring (6) is arranged at the upper port of the shell (1), a step (61) is arranged in the inner cavity of the compression ring (6), after the compression ring (6) is assembled with the shell (1), the bottom surface of the step (61) is in contact with the upper port of the shell (1), and the bottom surface of the step (61) is in contact with the upper surface of the porous metal medium layer (3).
2. The non-premixed diffusion burner according to claim 1, wherein the housing (1) is a high-temperature-resistant metal shell, the compression ring (6) is a high-temperature-resistant metal ring, the fuel conduit (4) is a high-temperature-resistant metal straight tube, and the housing (1) and the fuel conduit (4) are welded and fixed.
3. A non-premixed diffusion burner according to claim 2, wherein the fuel conduit (4) comprises a pipe joint (41) provided at the outer end.
4. The non-premixed diffusion burner according to claim 1, wherein the air conduit (5) comprises a transition joint (51) provided at an inner end, the air conduit (5) being interfaced with the air hole through the transition joint (51).
5. The non-premixed diffusion burner according to claim 1, wherein the upper end of the fuel conduit (4) is higher than the upper surface of the porous metal medium layer (3).
6. The non-premixed diffusion burner according to claim 5, wherein the upper end of the fuel conduit (4) is not higher than the upper surface of the pressure ring (6) after the pressure ring (6) is assembled with the housing (1).
7. The non-premixed diffusion burner according to claim 1, wherein the glass bead layer (2) is composed of a plurality of glass beads having different particle diameters of 1.5mm to 5mm.
8. The non-premixed diffusion burner according to claim 1, wherein the pore size of the porous metal medium layer (3) is 0.5-0.7 mm.
9. The non-premixed diffusion burner according to claim 8, wherein the pore size of the porous metal medium layer (3) is 0.64mm.
10. The non-premixed diffusion burner according to claim 1, wherein the outer side surface of the upper port of the housing (1) is provided with external threads, and the inner wall of the pressure ring (6) is provided with internal threads matched with the external threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322605973.5U CN221005056U (en) | 2023-09-26 | 2023-09-26 | Non-premixed diffusion burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322605973.5U CN221005056U (en) | 2023-09-26 | 2023-09-26 | Non-premixed diffusion burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221005056U true CN221005056U (en) | 2024-05-24 |
Family
ID=91116624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322605973.5U Active CN221005056U (en) | 2023-09-26 | 2023-09-26 | Non-premixed diffusion burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221005056U (en) |
-
2023
- 2023-09-26 CN CN202322605973.5U patent/CN221005056U/en active Active
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