CN219913059U - Methane low-nitrogen burner - Google Patents
Methane low-nitrogen burner Download PDFInfo
- Publication number
- CN219913059U CN219913059U CN202321280144.8U CN202321280144U CN219913059U CN 219913059 U CN219913059 U CN 219913059U CN 202321280144 U CN202321280144 U CN 202321280144U CN 219913059 U CN219913059 U CN 219913059U
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- CN
- China
- Prior art keywords
- pipeline
- burner
- combustion
- biogas
- ignition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 23
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims description 42
- 239000007921 spray Substances 0.000 claims abstract description 49
- 238000002485 combustion reaction Methods 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000000825 ultraviolet detection Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
The utility model discloses a biogas low-nitrogen burner which comprises a burner core pipe, a combustion air pipeline, a plurality of outer ring spray pipes, a plurality of inner ring spray pipes and an ignition pipeline, wherein the burner core pipe is connected with the combustion air pipeline; one end of the burner core tube is communicated with the biogas supply pipeline, the other end of the burner core tube extends into the combustion air pipeline, and the end part of the burner core tube is provided with a straight spray hole; an air inlet pipeline communicated with combustion air is arranged at one side of the combustion air pipeline; the outer ring spray pipes and the inner ring spray pipes are sequentially arranged on the burner core pipe from the flowing direction of the biogas; gaps for the flow of combustion-supporting air are formed between the outer ring spray pipe and the inner ring spray pipe and between the burner core pipes; one end of the ignition pipeline extends to the inside of the combustion air pipeline, and the other end of the ignition pipeline is exposed out of the combustion air pipeline; the ignition pipeline is inserted with a high-energy ignition rod. The device realizes multistage combustion of the biogas through the matched use of the device, ensures that the biogas is more fully and stably combusted, and can improve the ignition success rate.
Description
Technical Field
The utility model relates to the technical field of burners, in particular to a biogas low-nitrogen burner.
Background
Biogas has gained wide attention as renewable energy source from the beginning of the century, biogas engineering in China and European and American countries has developed faster, but there is no unified international standardized document for the design and use of burners, and biogas engineering in many developing countries usually can directly discharge redundant biogas into the atmosphere or discharge into the immediate atmosphere in a flare diffusing form, thus generating a large amount of greenhouse gas emission. Therefore, the design and application of the high-temperature flame burner can effectively reduce the emission of greenhouse gases and slow down climate deterioration.
The working pressure range of the biogas burner is generally designed to be 1.5-12kPa. The biogas burner generally has rated pressure, and the biogas burner is required to have no fire-out phenomenon under 1.5 times of rated pressure and have no tempering phenomenon under 0.5 times of rated pressure. The biogas pressure of the conventional biogas engineering system is generally 2.0-4.0kPa, so the rated pressure of the biogas burner is generally designed to be within the range, so that the pressurizing device is avoided from being added, and the following functions are expected to be achieved through the combustion of the biogas flame burner:
1. most of methane is fully combusted, and the combustion energy is utilized;
2. and VOCS (volatile organic compounds) such as hydrogen sulfide, ammonia gas and the like in the methane are treated.
However, the following problems often occur in the conventional biogas burner through practical use:
1. the ignition success rate is low, and when the traditional transformer electrode is adopted for ignition, the phenomenon of ignition failure often occurs;
2. abnormal flameout and tempering are easy to occur in the process of controlling the temperature and reducing the load;
3. under the condition of lifting load or big fire, the phenomena of flame separation or fire release are easy to occur.
Therefore, a biogas low-nitrogen burner is needed to solve the above problems.
Disclosure of Invention
The utility model aims to provide a methane low-nitrogen burner so as to ensure the ignition success rate and improve the stability of flame combustion.
In order to solve the technical problems, the utility model provides a biogas low-nitrogen burner which comprises a burner core pipe, a combustion-supporting air pipeline, a plurality of outer ring spray pipes, a plurality of inner ring spray pipes and an ignition pipeline;
one end of the burner core tube is communicated with a methane supply pipeline, the other end of the burner core tube extends into the combustion-supporting air pipeline, and the end part of the burner core tube is provided with a straight spray hole;
an air inlet pipeline communicated with combustion air is arranged at one side of the combustion air pipeline;
the outer ring spray pipes and the inner ring spray pipes are sequentially arranged on the burner core pipe from the flowing direction of methane and are positioned in the combustion air pipeline;
gaps for combustion-supporting air flow are formed between the outer ring spray pipe and the inner ring spray pipe and between the two burner core pipes;
one end of the ignition pipeline extends to the inside of the combustion-supporting air pipeline, the other end of the ignition pipeline is exposed out of the combustion-supporting air pipeline, and the ignition pipeline is positioned below the air injection end of the burner core pipe;
the ignition pipeline is internally inserted with a high-energy ignition rod.
Further, the combustion-supporting air pipeline comprises a rear end cover, a cylinder body and a fire protection cylinder which are welded in sequence;
the burner core tube is welded with the rear end cover through a core tube fixing flange;
the ignition pipeline is welded with the rear end cover;
and a burner mounting flange is arranged on the outer wall of the cylinder body.
Further, a fire observation mirror and a fire detection probe interface are arranged on the rear end cover.
Further, the end part of the fire protection cylinder is arranged in a necking shape.
Further, a plurality of flame stabilizing holes are formed in the air injection end of the burner core tube along the circumferential direction.
Further, a plurality of premixing holes are arranged on the outer ring spray pipe and the inner ring spray pipe along the vertical axial direction.
Further, a plurality of outer ring spray pipes and a plurality of inner ring spray pipes are arranged on the burner core pipe at equal intervals in a ring shape.
Further, a biogas interface flange is arranged at the end part of the burner core tube;
an air inlet flange is arranged at the end part of the air inlet pipeline.
Further, an air disc is welded on the outer wall of the burner core tube;
the air disc is positioned between the burner core tube and the inner ring spray tube, and a plurality of air distribution holes are formed in the air disc.
Further, the air distribution holes are arranged in a strip hole type structure.
Compared with the prior art, the utility model has at least the following beneficial effects:
through setting up nozzle core pipe and combustion-supporting wind pipeline, the combination forms the gas channel that is used for marsh gas and combustion-supporting wind gas to through setting up a plurality of outer loop spray pipes, inner loop spray pipes and straight orifice, and form the clearance between two by two, and then can realize the multistage burning of marsh gas when the ignition, separate into a plurality of flames and burn that will single flame, make marsh gas burning more abundant and stable.
In addition, through setting up ignition line and high energy ignition pole, and the ignition line extends to combustion-supporting tuber pipe way inside to be located the below of the jet end of nozzle core pipe, realize the secondary ignition under the methane combustion forced draft, thereby reach the purpose that promotes the ignition success rate.
Furthermore, by arranging the flame stabilizing holes and the wind disc on the burner core tube, combustion-supporting wind is guided to the periphery of the flame stabilizing holes, so that flame can be stably kept at the outer axial side of the burner core tube when ignition operation is completed, the backfire resistance of the flame is improved, and meanwhile, the flame separation resistance and the flame release resistance are improved.
Drawings
FIG. 1 is a schematic diagram of a biogas low-nitrogen burner;
FIG. 2 is a side view of the biogas low nitrogen burner of the present utility model;
FIG. 3 is a side view of the junction of a biogas low nitrogen burner stroke disk and a burner core tube of the present utility model.
Detailed Description
The biogas low nitrogen burner according to the utility model will be described in more detail below in connection with a schematic drawing, wherein preferred embodiments of the utility model are shown, it being understood that the person skilled in the art can modify the utility model described herein while still achieving the advantageous effects of the utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model.
The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.
As shown in fig. 1 and 3, the embodiment of the utility model provides a biogas low-nitrogen burner, which comprises a burner core tube 3, a combustion air pipeline, a plurality of outer ring spray pipes 6, a plurality of inner ring spray pipes 7 and an ignition pipeline 2.
One end of the burner core tube 3 is communicated with a methane gas supply pipeline, the other end of the burner core tube extends into the combustion-supporting air pipeline, and the end part of the burner core tube 3 is provided with a straight spray hole 32 for providing methane required by flame combustion and spraying the methane from the straight spray hole 32.
An air inlet pipeline 43 communicated with combustion air is arranged on one side of the combustion air pipeline and is used for providing required combustion air gas for flame combustion.
The outer ring spray pipes 6 and the inner ring spray pipes 7 are sequentially arranged on the burner core pipe 3 from the flowing direction of the biogas and are positioned in the combustion-supporting air pipeline, so that the biogas can be sprayed out of the outer ring spray pipes 6, the inner ring spray pipes 7 and the straight spray holes 32 respectively.
Gaps for the flow of combustion-supporting air gas are formed among the outer ring spray pipe 6, the inner ring spray pipe 7 and the burner core pipe 3, so that the combustion-supporting air gas and the biogas are mixed for combustion.
In summary, the device combines the burner core tube 3 and the combustion air pipeline to form a gas channel for mixed combustion of biogas and combustion air, and forms a gap between two outer ring spray pipes 6, inner ring spray pipes 7 and straight spray holes 32, so that multistage combustion of biogas can be realized when ignition is performed, namely, a single flame is separated into a plurality of flames for combustion, and biogas combustion is more sufficient and stable.
In particular, the components of the common biogas are a multicomponent gas mixture composed of 50% -70% methane (CH 4), 20% -40% carbon dioxide (CO 2), 3% -6% nitrogen (N2), less than 1% hydrogen (H2), less than 0.4% oxygen (O2) and 0.1% -3% hydrogen sulfide (H2S), and the like, which forms more nitrogen oxide (NOx) due to insufficient combustion in the combustion process, and the nitrogen oxide is one of the main pollutants in the air, so that the formation of the nitrogen oxide in the combustion process needs to be reduced.
The device separates a single large flame into a plurality of small flames through the multi-stage combustion mode, so that the heat dissipation area of the flames is increased, the temperature of the flames is lower, the generation of thermal type oxynitride is effectively reduced, in addition, the residence time of oxygen, nitrogen and other gases in the flames is shortened due to the tiny flames, the generation of thermal type oxynitride and fuel type oxynitride is also inhibited, and the aim of reducing pollutant emission is achieved.
One end of the ignition pipeline 2 extends to the inside of the combustion-supporting air pipeline, the other end of the ignition pipeline is exposed out of the combustion-supporting air pipeline, the ignition pipeline 2 is positioned below the air injection end of the burner core pipe 3, and a high-energy ignition rod is inserted in the ignition pipeline 2.
The ignition pipeline 2 and the high-energy ignition rod are arranged, the ignition pipeline 2 extends into the combustion-supporting air pipeline and is positioned below the air injection end of the burner core pipe 3, so that secondary ignition under methane combustion forced ventilation is realized, and the purpose of improving the ignition success rate is achieved.
The ignition pipeline 2 can adopt a pilot lamp in the prior art.
As shown in fig. 2, in this embodiment, a specific combustion air pipe is also provided, so as to better provide the combustion air and make the flame burn more uniformly.
Specifically, the combustion-supporting air duct comprises a rear end cover 42, a cylinder 41 and a fire protection cylinder 9 which are welded in sequence.
The burner core tube 3 is welded with the rear end cover 42 through the core tube fixing flange 33 so as to stably spray the biogas into the combustion-supporting air pipeline and mix the biogas with the combustion-supporting air.
The ignition tube 2 is welded to the rear end cap 42.
The outer wall of the cylinder 41 is provided with a burner mounting flange 5.
The rear end cover 42 is provided with a flame observation mirror 10 and a flame detection probe interface 11 for observing and detecting the flame and the combustion effect.
It should be noted that the fire detection probe interface 11 may be designed as a UV detection or ion rod detection. When the ion rod is used for detecting, the arrangement of the probe ensures that the flame of the ignition pipeline 2 and the flame generated by methane combustion in the burner core tube 3 can be detected, and the detection effect is improved.
In a further embodiment, the end of the flame holder 9 is provided with a constriction (not shown) to stabilize the flame and increase the flame ejection speed.
In other embodiments, as shown in fig. 3, the air injection end of the burner core tube 3 is provided with a plurality of flame stabilizing holes 31 along the circumferential direction for improving the stability of flame combustion.
In addition, a plurality of premixing holes are formed in the outer ring spray pipe 6 and the inner ring spray pipe 7 along the circumferential direction, so that the mixing rate of methane and combustion-supporting air is increased, the combustion effect of flame during subsequent ignition is improved, the methane is combusted more fully, and the oxynitride is further reduced.
Wherein, a plurality of outer ring spray pipes 6 and a plurality of inner ring spray pipes 7 are all arranged on the burner core pipe 3 in an annular equidistant manner.
It should be noted that, in this embodiment, the outer ring nozzle 6 and the nozzles of the inner ring nozzles 7 may use venturi jet nozzles to further enhance the combustion effect of the flame.
In other embodiments, in order to facilitate connection of the burner core tube 3 with the biogas pipeline and prevent situations such as air leakage, the end of the burner core tube 3 is provided with a biogas port flange 1.
Correspondingly, in order to improve the stability of the combustion air intake of the combustion air duct, the end of the air intake duct 43 is provided with an air intake flange 44.
In a further embodiment, a wind disc 8 is welded on the outer wall of the burner core tube 3, and is used for guiding combustion air to the flame stabilizing hole 31 of the burner core tube 3, so as to improve the stability of flame.
The air disk 8 is located between the burner core pipe 3 and the inner ring spray pipe 7, and is internally provided with a plurality of air distribution holes 81, wherein the air distribution holes 81 are arranged in a strip hole type structure.
It should be noted that the shape of the air distribution hole 81 may be a circular hole, a swirl slit, or the like, and is not limited thereto.
In summary, the device is provided with the flame stabilizing holes 31 and the wind disc 8 on the burner core tube 3 to guide the combustion-supporting wind to the periphery of the flame stabilizing holes 31, so that when the ignition operation is completed, the flame can be stably maintained at the periphery of the ejection end of the burner core tube 3, thereby improving the anti-backfire performance of the flame, and simultaneously improving the flame-leaving and flame-out resistance, so as to solve the problems of flameout, backfire, flame-leaving, flame-out and the like of the burner in the prior art, and improve the combustion stability of the flame.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The biogas low-nitrogen burner is characterized by comprising a burner core tube, a combustion air pipeline, a plurality of outer ring spray pipes, a plurality of inner ring spray pipes and an ignition pipeline;
one end of the burner core tube is communicated with a methane supply pipeline, the other end of the burner core tube extends into the combustion-supporting air pipeline, and the end part of the burner core tube is provided with a straight spray hole;
an air inlet pipeline communicated with combustion air is arranged at one side of the combustion air pipeline;
the outer ring spray pipes and the inner ring spray pipes are sequentially arranged on the burner core pipe from the flowing direction of methane and are positioned in the combustion air pipeline;
gaps for combustion-supporting air flow are formed between the outer ring spray pipe and the inner ring spray pipe and between the two burner core pipes;
one end of the ignition pipeline extends to the inside of the combustion-supporting air pipeline, the other end of the ignition pipeline is exposed out of the combustion-supporting air pipeline, and the ignition pipeline is positioned below the side of the air injection end of the burner core pipe;
the ignition pipeline is internally inserted with a high-energy ignition rod.
2. The biogas low-nitrogen burner according to claim 1, wherein the combustion-supporting air duct comprises a rear end cover, a cylinder body and a fire protection cylinder which are welded in sequence;
the burner core tube is welded with the rear end cover through a core tube fixing flange;
the ignition pipeline is welded with the rear end cover;
and a burner mounting flange is arranged on the outer wall of the cylinder body.
3. The biogas low-nitrogen burner according to claim 2, wherein the rear end cover is provided with a fire observation mirror and a fire detection probe interface.
4. The biogas low nitrogen burner according to claim 2, wherein the end of the flame protection barrel is provided in a necked-down shape.
5. The biogas low-nitrogen burner according to claim 1, wherein the gas injection end of the burner core tube is provided with a plurality of flame stabilizing holes along the circumferential direction.
6. The biogas low-nitrogen burner according to claim 1, wherein the outer ring nozzle and the inner ring nozzle are vertically provided with a plurality of premixing holes along the upper edges thereof.
7. The biogas low nitrogen burner according to claim 1, wherein a plurality of said outer annular nozzles and a plurality of said inner annular nozzles are all disposed annularly equidistant on said burner core.
8. The biogas low-nitrogen burner according to claim 1, wherein the end of the burner core tube is provided with a biogas interface flange;
an air inlet flange is arranged at the end part of the air inlet pipeline.
9. The biogas low-nitrogen burner according to claim 1, wherein a wind disc is welded on the outer wall of the burner core tube;
the air disc is positioned between the burner core tube and the inner ring spray tube, and a plurality of air distribution holes are formed in the air disc.
10. The biogas low nitrogen burner according to claim 9, wherein said air distribution holes are arranged in a strip hole type structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320937197 | 2023-04-24 | ||
| CN2023209371976 | 2023-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219913059U true CN219913059U (en) | 2023-10-27 |
Family
ID=88422894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321280144.8U Active CN219913059U (en) | 2023-04-24 | 2023-05-25 | Methane low-nitrogen burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219913059U (en) |
-
2023
- 2023-05-25 CN CN202321280144.8U patent/CN219913059U/en active Active
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