CN217031187U - Metal fiber burner for full-premixing low-nitrogen condensation boiler - Google Patents
Metal fiber burner for full-premixing low-nitrogen condensation boiler Download PDFInfo
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- CN217031187U CN217031187U CN202220724734.4U CN202220724734U CN217031187U CN 217031187 U CN217031187 U CN 217031187U CN 202220724734 U CN202220724734 U CN 202220724734U CN 217031187 U CN217031187 U CN 217031187U
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- Prior art keywords
- air
- metal fiber
- inlet cover
- guide pipe
- head
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- Expired - Fee Related
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- 239000000835 fiber Substances 0.000 title claims abstract description 35
- 239000002184 metal Substances 0.000 title claims abstract description 35
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 13
- 238000009833 condensation Methods 0.000 title claims description 4
- 230000005494 condensation Effects 0.000 title claims description 4
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 abstract description 33
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 5
- 239000004744 fabric Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 235000009781 Myrtillocactus geometrizans Nutrition 0.000 description 2
- 240000009125 Myrtillocactus geometrizans Species 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- Gas Burners (AREA)
Abstract
The utility model discloses a metal fiber burner for a full-premixing low-nitrogen condensing boiler, which comprises a metal fiber burning head, wherein one end of the burning head is fixed with an air inlet cover, and the other end of the burning head is sealed by a sealing plate; the center of the metal fiber combustion head is provided with an air duct connected with the air inlet cover, and the outlet end of the air duct is closed; the air guide pipe is distributed with a plurality of circles of air holes along the length direction, and the total section of each circle of air holes is gradually increased from the air inlet cover to the sealing plate. The total cross section of each circle of air holes on the air guide pipe is gradually increased from the air inlet cover to the sealing plate, so that the air resistance at the rear part of the air guide pipe is smaller than that at the front part, the air flow speed caused by pressure reduction is counteracted through the reduction of the air resistance, and the mixed gas is uniformly distributed into the metal fiber combustion head from the air guide pipe, so that the uniform combustion is ensured, the mixed gas can be uniformly combusted in the metal fiber combustion head and on the surface of the metal fiber combustion head, the possibility of local high temperature is reduced, and the generation of nitrogen oxides is reduced.
Description
Technical Field
The utility model relates to the technical field of environment-friendly burners, in particular to a metal fiber burner for a fully premixed low-nitrogen condensing boiler.
Background
The furnace end in the low-nitrogen condensation boiler adopts a metal fiber burner, the metal fiber burner belongs to the surface combustion of premixed gas, and a premixed gas-air mixture flows to the head of the burner and burns on a metal fiber fabric surface layer with uniform air permeability. Combustion is carried out in two ways, namely, an infrared heat radiation manner and a blue flame manner. Infrared radiation means that the combustible mixture burns inside the fabric, the metal fiber fabric is heated to incandescent state, and a part of the heat is released in radiation. The blue flame mode is that the combustible mixture burns over the fabric, the flame bears a blue color floating on the surface, and the heat is released in a convective manner.
Because of the uniform air permeability of the metal fiber fabric and the uniform premixing of the fuel gas and the air, the combustion is very stable, the temperature distribution is uniform, and no local high temperature exists, thereby inhibiting the generation of NOx. The premixing has enough air supply, so the emission of C0 is also low. However, due to the ultrahigh air permeability of the metal fibers, after the directly injected mixed gas overflows from the front end, the pressure can be reduced, so that the overflow gas in the backward direction is less and less, and the gas is not distributed at the rear end of the metal fiber combustor and is already overflowed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a metal fiber burner for a fully premixed low-nitrogen condensing boiler so as to solve the technical problem in the background technology.
The technical scheme of the utility model is as follows:
a metal fiber burner for a full-premixing low-nitrogen condensing boiler comprises a metal fiber burning head, wherein one end of the burning head is fixed with an air inlet cover, and the other end of the burning head is sealed by a sealing plate; the center of the metal fiber combustion head is provided with an air duct connected with the air inlet cover, and the outlet end of the air duct is closed; the air guide pipe is distributed with a plurality of circles of air holes along the length direction, and the total cross section of each circle of air holes is gradually increased from the air inlet cover to the sealing plate.
Furthermore, the diameters of the air ducts are equal, the number of the air holes distributed on each circle is equal, but the diameters of the air holes are increased step by step.
Furthermore, the diameters of the air ducts are equal, and the diameters of the air holes distributed on the air ducts are equal, but the number of the air holes is increased step by step.
Furthermore, the diameter of the air duct is gradually increased from the air inlet hood to the closing plate, and each circle of air holes distributed on the air duct are equal in diameter but gradually increased in number.
Furthermore, a flow guide cover is arranged in the air inlet cover, and an outlet of the flow guide cover is connected with an inlet of the air guide pipe.
The utility model has the advantages that:
according to the utility model, after mixed gas enters the gas inlet hood, the mixed gas firstly enters the gas guide pipe, a plurality of circles of gas holes are distributed in the gas guide pipe along the length direction of the gas guide pipe, the sum of the cross sections of each circle of gas holes is gradually increased from the gas inlet hood to the sealing plate, so that the rear air resistance of the gas guide pipe is smaller than that of the front air resistance, the mixed gas gradually overflows from the front air resistance, and the pressure is gradually reduced, so that the flow velocity of the gas reduced due to the pressure is counteracted through the reduction of the air resistance, the mixed gas is uniformly distributed from the gas guide pipe to the metal fiber combustion head, the uniform combustion is ensured, the mixed gas can be uniformly combusted in the metal fiber combustion head and on the surface, the possibility of local high temperature is further reduced, and the generation of nitrogen oxides is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
fig. 2 is a schematic perspective view of the present invention.
In the figure: 1-air inlet hood, 2-air guide hood, 3-metal fiber combustion head, 31-sealing plate, 4-air guide pipe and 41-air hole.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-2:
a metal fiber burner for a full-premixing low-nitrogen condensing boiler comprises a metal fiber burning head 3, wherein one end of the burning head is fixed with an air inlet cover 1, and the other end of the burning head is sealed by a sealing plate 31; the center of the metal fiber combustion head 3 is provided with an air duct 4 connected with the air inlet cover 1, and the outlet end of the air duct 4 is closed; the air duct 4 is provided with a plurality of circles of air holes 41 along the length direction, and the total cross section of each circle of air holes 41 is gradually increased from the air inlet cover 1 to the closing plate 31.
The working principle is as follows: according to the utility model, after mixed gas enters the air inlet hood 1, the mixed gas firstly enters the air guide pipe 4, the air guide pipe 4 is distributed with a plurality of circles of air holes 41 along the length direction, the sum of the sections of each circle of air holes 41 is gradually increased from the air inlet hood 1 to the closing plate 31, so that the air resistance at the rear part of the air guide pipe 4 is smaller than that at the front part, the mixed gas gradually overflows from the front part, and the pressure is also gradually reduced, therefore, the gas flow velocity caused by the pressure reduction is counteracted through the reduction of the air resistance, and the mixed gas is uniformly distributed from the air guide pipe 4 to the metal fiber combustion head 3, so that the uniform combustion is ensured, the mixed gas can be uniformly combusted in the metal fiber combustion head 3 and on the surface, the possibility of local high temperature is further reduced, and the generation of nitrogen oxides is reduced.
There are several solutions for increasing the total cross-section of each circle of air holes 41 step by step, the first is that the air duct 4 has the same diameter, and each circle of air holes 41 is distributed with the same number, but the diameter of the air holes 41 is increased step by step, and the total cross-section is changed by increasing the diameter.
The second scheme is that the diameters of the air ducts 4 are equal, each circle of air holes 41 distributed on the air ducts are equal in diameter, but the number of the air ducts is increased step by step and is increased by the number of the air ducts.
However, in the second scheme, the number of the air holes 41 at the rear end is large, so that the diameter of the front end needs to be large, and the second scheme can be further improved, so that the diameter of the air duct 4 is gradually increased from the air inlet cover 1 to the closing plate 31, and each circle of air holes 41 distributed on the air duct is equal in diameter, but the number is gradually increased, so that the problem in the second scheme can be solved, the section of the front end of the air duct 4 is small, the flow speed is high, and the pressure is relatively reduced, so that the problem that the mixed gas overflows fast due to the fact that the pressure is too large at the front end, and the problem that the gas is distributed backwards and is small can be solved, and under the structure, the difference of the sum of the sections of the air holes 41 can be reduced.
Because the mixed gas is ensured to stably enter the gas guide pipe 4, the flow guide cover 2 is arranged in the gas inlet cover 1, and the outlet of the flow guide cover 2 is connected with the inlet of the gas guide pipe 4.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the utility model, and these embodiments are still within the scope of the utility model.
Claims (5)
1. The utility model provides a metal fiber combustor for low nitrogen condensation boiler of full premix which characterized in that: the burner comprises a metal fiber burner head, wherein one end of the burner head is fixed with an air inlet cover, and the other end of the burner head is sealed by a sealing plate; the center of the metal fiber combustion head is provided with an air duct connected with the air inlet cover, and the outlet end of the air duct is closed; the air guide pipe is distributed with a plurality of circles of air holes along the length direction, and the total cross section of each circle of air holes is gradually increased from the air inlet cover to the sealing plate.
2. The metal fiber burner for the fully premixed low-nitrogen condensing boiler as claimed in claim 1, wherein: the diameters of the air ducts are equal, the number of the air holes distributed on each circle of the air ducts is equal, but the diameters of the air holes are gradually increased.
3. The metal fiber burner for the fully premixed low-nitrogen condensing boiler as claimed in claim 1, wherein: the diameters of the air ducts are equal, and the diameters of the air holes distributed on the air ducts are equal, but the number of the air holes is increased step by step.
4. The metal fiber burner for the fully premixed low-nitrogen condensing boiler as claimed in claim 1, wherein: the diameter of the air duct is gradually increased from the air inlet cover to the closing plate, and the diameters of the air holes distributed on the air duct are equal, but the number of the air holes is gradually increased.
5. The metal fiber burner for a full premix low nitrogen condensing boiler according to any one of claims 1 to 4, wherein: a flow guide cover is arranged in the air inlet cover, and an outlet of the flow guide cover is connected with an inlet of the air guide pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220724734.4U CN217031187U (en) | 2022-03-30 | 2022-03-30 | Metal fiber burner for full-premixing low-nitrogen condensation boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220724734.4U CN217031187U (en) | 2022-03-30 | 2022-03-30 | Metal fiber burner for full-premixing low-nitrogen condensation boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217031187U true CN217031187U (en) | 2022-07-22 |
Family
ID=82413144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220724734.4U Expired - Fee Related CN217031187U (en) | 2022-03-30 | 2022-03-30 | Metal fiber burner for full-premixing low-nitrogen condensation boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217031187U (en) |
-
2022
- 2022-03-30 CN CN202220724734.4U patent/CN217031187U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220722 |
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| CF01 | Termination of patent right due to non-payment of annual fee |