CN112413583B - A porous biomass gas low nitrogen burner - Google Patents
A porous biomass gas low nitrogen burner Download PDFInfo
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- CN112413583B CN112413583B CN201910785204.3A CN201910785204A CN112413583B CN 112413583 B CN112413583 B CN 112413583B CN 201910785204 A CN201910785204 A CN 201910785204A CN 112413583 B CN112413583 B CN 112413583B
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- Prior art keywords
- gas
- channel
- air duct
- air
- gas channel
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- 239000007789 gas Substances 0.000 title claims abstract description 112
- 239000002028 Biomass Substances 0.000 title claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 18
- 230000004323 axial length Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000002912 waste gas Substances 0.000 abstract description 4
- 239000002737 fuel gas Substances 0.000 description 16
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000010304 firing Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a porous biomass gas low-nitrogen burner which comprises a central air channel, and a gas channel and an auxiliary air channel which are sequentially arranged around the central air channel from inside to outside, wherein outlets at the front ends of the central air channel, the gas channel and the auxiliary air channel are flush, a plurality of through air holes are formed in the whole bodies of the front ends of the central air channel and the gas channel, and inlets are respectively and correspondingly formed in the rear ends of the central air channel, the gas channel and the auxiliary air channel. According to the invention, the air holes are arranged on the gas channel and the central air channel, so that air and gas are premixed in the combustor through the air holes, the mixing degree of the gas and the air is improved, the utilization rate of the gas and the air is improved, the emission of waste gas is reduced, and the whole structure is simple.
Description
Technical Field
The invention belongs to the technical field of combustion equipment, and particularly relates to a porous biomass gas low-nitrogen burner.
Background
Biomass energy is used as the fourth largest energy in the world and accounts for about 14% of the total energy consumption in the world. The biomass energy source is wide, the volatile content is high, the ash content is low, the sulfur content is low, and the amount of CO 2 absorbed by the growth environment is equal to the amount of CO 2 discharged by combustion, so that the net discharge amount of CO 2 is approximately zero in the energy conversion process, and the greenhouse effect is improved. The technology for efficiently utilizing biomass energy is researched and developed, conventional fossil energy is saved, and the energy structure is optimized, so that the method has very important significance. The biomass gas is combustible gas generated by crop straws and forestry waste through a gasification furnace, is a way for the development of biomass energy to large-scale industrial application, and is gradually popularized and utilized at present.
The burner is used for burning and heating boiler bodies such as a boiler or an annealing furnace, the burner is provided with a gas pipeline and an air pipeline, the gas pipeline is used for conveying gas, the air pipeline is used for conveying air, a firing head of a firing gun is arranged at the collecting position of the gas conveyed by the gas pipeline and the air pipeline, and the gas is ignited by the firing head, so that the furnace body is heated. The existing burner is more in separate arrangement of the gas pipeline and the air pipeline, such as cross arrangement, the cross part is the junction of the gas pipeline outlet and the air pipeline outlet, the junction is further provided with the ignition head of the ignition gun, the structure of the burner is more complex, the phenomenon of insufficient mixing is easy to occur because the gas and the air are mixed at the junction, the gas is burnt insufficiently, the energy waste is caused, and the potential safety hazard caused by insufficient combustion is large.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the porous biomass fuel gas low-nitrogen burner, wherein air holes are formed in a fuel gas channel and a central air channel, so that air and fuel gas are premixed in the burner through the air holes, the mixing degree of the fuel gas and the air is improved, the utilization rate of the fuel gas and the air is improved, the emission of waste gas is reduced, and the whole structure is simple.
In order to solve the technical problems, the invention provides a porous biomass fuel gas low-nitrogen burner which comprises a central air channel, and a fuel gas channel and an auxiliary air channel which are sequentially arranged around the central air channel from inside to outside, wherein outlets at the front ends of the central air channel, the fuel gas channel and the auxiliary air channel are flush, a plurality of penetrating air holes are formed in the whole bodies of the front ends of the central air channel and the fuel gas channel, and inlets are respectively and correspondingly formed in the rear ends of the central air channel, the fuel gas channel and the auxiliary air channel.
Further, the central air duct, the auxiliary air duct and the fuel gas channel are all annular channels.
Further, the length of the gas channel is the same as that of the auxiliary air channel, and the rear end of the central air channel protrudes out of the gas channel.
Further, the rear end of the central air duct is an opening.
Further, an air connecting pipe communicated with the auxiliary air duct is arranged on the periphery of the rear end of the auxiliary air duct, and a gas connecting pipe communicated with the gas channel and penetrating through the auxiliary air duct is arranged on the periphery of the rear end of the gas channel.
Further, the air connecting pipe and the gas connecting pipe face the same direction or face different directions respectively.
Furthermore, the front end of the central air duct is in a truncated cone shape which is obliquely arranged towards the center, a plurality of air holes are also formed in the inclined surface around the truncated cone shape, and a central hole is formed in the center of the front end face of the truncated cone shape.
Furthermore, the front end of the gas channel is inclined outwards to form a horn shape, and a plurality of air holes are also formed in the whole body of the horn shape.
Further, an oil leakage hole is formed in the periphery of the front end of the auxiliary air duct.
Furthermore, valves for adjusting flow are arranged on the central air duct, the fuel gas channel and the auxiliary air duct.
The invention has the following beneficial effects:
The porous biomass gas low-nitrogen burner has the advantages that the gas holes are formed in the front ends of the gas channel and the central air channel which are coaxially arranged, so that air and gas are premixed in the burner through the gas holes, the mixing degree of the gas and the air is improved, the utilization rate of the gas and the air is improved, waste gas emission is reduced, the air is simultaneously input into the gas channel by utilizing the central air channel and the auxiliary air channel which are arranged inside and outside, the premixing degree and speed between the air and the gas are improved, the whole structure is simple, the front end of the central air channel is designed into a cone shape, the air can be used for compressing the air and dispersing outwards, the air in the central air channel can be better introduced into the gas channel to be premixed with the gas, the front end of the gas channel is also designed into a horn shape, the front end outlet of the auxiliary air channel is shielded by the horn shape, the air in the auxiliary air channel is used for compressing the air in the auxiliary air channel to be obliquely inwards dispersed, the air in the auxiliary air channel can be better introduced into the gas channel to be premixed with the gas, and the air can be better premixed with the gas by utilizing the structure design to achieve the aim of full combustion.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this specification, are incorporated in and constitute a part of this specification and do not limit the application in any way, and in which:
FIG. 1 is a schematic diagram of a porous biomass gas low nitrogen burner in an embodiment;
FIG. 2 is a front view of a porous biomass gas low nitrogen burner in an embodiment;
FIG. 3 is a cross-sectional view of a porous biomass gas low nitrogen burner in an embodiment.
Detailed Description
In order to more fully understand the technical content of the present invention, the present invention will be further described and illustrated with reference to the accompanying drawings and specific embodiments, wherein the descriptions of "first" and "second" in the text are used for distinguishing different components, etc., and do not represent the sequence, and the descriptions of "first" and "second" are not limited to be of different types.
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Examples
As shown in fig. 1 to 3, the porous biomass gas low-nitrogen burner in this embodiment includes a central air duct 1, and two gas channels 2 and auxiliary air ducts 3 sequentially surrounding the central air duct 1 from inside to outside, wherein outlets at front ends of the central air duct 1, the gas channels 2 and the auxiliary air ducts 3 are flush, and the whole bodies of front sections of the central air duct and the gas channels are provided with a plurality of air holes 4 which are uniformly distributed and penetrate through the whole bodies, so that the front sections of the central air duct, the gas channels and the auxiliary channels are communicated through the air holes for gas circulation, thereby forming a premixing zone 5 at the front ends of the gas channels, and the axial lengths of the air holes arranged in the central air duct and the gas channels are the same, so that air inside and outside simultaneously enters the gas channels for premixing; in the structure, through setting up the air hole in the gas channel and front end of the central air channel that sets up coaxially, in order to make air and gas circulate and premix through the air hole in the burner, have improved the mixed degree of gas and air, make the utilization ratio of gas and air improve, thus reduce the discharge of the waste gas, and utilize central air channel and auxiliary air channel that inside and outside set up to input the air to the gas channel at the same time, improve the premixing degree and speed between gas and the air, and overall structure is simple.
Specifically, the central air duct 1, the auxiliary air duct 3 and the gas channel 2 are all annular channels, the gas channel 2 and the auxiliary air duct 3 have the same length, the rear end of the central air duct 1 protrudes out of the gas channel 2, the protruding part of the rear end of the central air duct is convenient for the arrangement of the inlet of the central air duct, in practice, the central air duct is a round tube penetrating front and back, namely, the rear end of the central air duct is an opening, and the central air duct is used as the inlet of the central air duct, so that the integral structure can be simplified.
Specifically, the outer periphery of the rear end of the auxiliary air duct 3 is provided with an air connecting pipe 31 communicated with the air connecting pipe, the outer periphery of the rear end of the gas channel 2 is provided with a gas connecting pipe 21 communicated with the air connecting pipe and penetrating through the auxiliary air duct 3 outwards, and the air connecting pipe 31 and the gas connecting pipe 21 are respectively used as inlets of the auxiliary air duct and the gas channel and are respectively connected with an external air supply pipeline and an external air supply pipeline.
The gas connecting pipes 21 and the air connecting pipes 31 are respectively oriented in the same direction or opposite directions, and can be set to be oriented at will according to actual site conditions, so that the gas connecting pipes are convenient and flexible, in the embodiment, the gas connecting pipes are oriented in opposite directions, the adjacent two connecting pipes can be prevented from being influenced by each other by different orientations, and the axial dimension (namely the transverse dimension) of the porous biomass gas low-nitrogen burner can be reduced as much as possible.
In the embodiment, the front end of the central air duct 1 is a truncated cone-shaped 11 which is obliquely arranged towards the center, a plurality of uniformly distributed air holes are also formed in the peripheral inclined surfaces of the truncated cone-shaped 11, a central hole 111 is formed in the center of the front end surface of the truncated cone-shaped 11, the front end of the central air duct is designed into a truncated cone shape, the volume of an outlet is reduced, the air can be used for compressing air and enabling the air to be emitted obliquely outwards, and the air in the central channel can enter a fuel gas channel to be premixed with fuel gas better.
In this embodiment, the front end of the gas channel 2 is inclined outwards to form a horn shape 22, and a plurality of uniformly distributed air holes 4 are also arranged on the whole body of the horn shape.
In this embodiment, the bottom of the outer periphery of the front end of the auxiliary air duct 3 is provided with an oil leakage hole 6, which can be used for discharging the dropped tar when the fuel gas with tar is used for combustion.
In other embodiments of the invention, a sealing cover can be arranged at the oil leakage hole, and the natural gas is used for burning the combustor without using the oil leakage hole to discharge tar.
In other embodiments of the invention, the rear end of the central air duct, the front end of the gas connecting pipe and the front end of the air connecting pipe are provided with connecting flanges, so that the connecting flanges are conveniently connected with an external air supply pipeline and an external air supply pipeline.
In other embodiments of the present invention, valves for adjusting the gas flow or air flow are provided on the central air duct, the gas duct, and the auxiliary air duct.
In other embodiments of the invention, the axial length of the air hole arranged in both the central air channel and the gas channel is controlled to be 1/3-1/2 of the axial length of the gas channel, so that the length of the premixing zone is ensured to be enough.
The working principle of the burner of the embodiment is that the front half of the gas channel (namely the part at the outlet) is clamped by an inner air channel and an outer air channel communicated with the gas channel through an air hole, and the specific working modes can be divided into two modes:
In one low flow rate mode, the air in the central air duct and the auxiliary air duct enter the gas channel through the air holes to be premixed with the gas, and when the premixed gas flows out of the burner through the outlet of the gas channel, the premixed gas is mixed with the air again to reach proper concentration and is ignited.
The second mode is a high flow rate working mode, namely premixing is carried out in the first mode, but the mixture is directly sprayed out of the burner when the mixture is mixed to a proper concentration in the burner and then is ignited, so that the flow rate of the fuel gas and the air in the burner needs to be controlled to be higher than the reverse combustion speed, and the potential safety hazard caused by the combustion condition in the burner is avoided.
While the foregoing has been provided by embodiments of the present invention with particularity, the principles and modes of carrying out the embodiments of the present invention have been described in detail by way of example only, and are not intended to limit the invention to the particular embodiments and modes of carrying out the invention, as will be apparent to those skilled in the art from consideration of this disclosure.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910785204.3A CN112413583B (en) | 2019-08-23 | 2019-08-23 | A porous biomass gas low nitrogen burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910785204.3A CN112413583B (en) | 2019-08-23 | 2019-08-23 | A porous biomass gas low nitrogen burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112413583A CN112413583A (en) | 2021-02-26 |
| CN112413583B true CN112413583B (en) | 2025-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910785204.3A Active CN112413583B (en) | 2019-08-23 | 2019-08-23 | A porous biomass gas low nitrogen burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112413583B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115585457B (en) * | 2022-10-20 | 2023-06-30 | 和和能源(北京)有限公司 | Partial premixed combustion rate regulation and control straight flame combustor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201145281Y (en) * | 2007-12-10 | 2008-11-05 | 刘武标 | Low pressure industrial waste gas burner |
| CN104075319A (en) * | 2014-06-19 | 2014-10-01 | 广东正鹏生物质能源科技有限公司 | Biomass gas combustion device used for industrial boiler |
| CN106122946A (en) * | 2016-08-31 | 2016-11-16 | 重庆赛迪热工环保工程技术有限公司 | A kind of Flat Flame Burner |
| CN210568406U (en) * | 2019-08-23 | 2020-05-19 | 广州环渝能源科技有限公司 | Porous biomass gas low-nitrogen combustor |
-
2019
- 2019-08-23 CN CN201910785204.3A patent/CN112413583B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201145281Y (en) * | 2007-12-10 | 2008-11-05 | 刘武标 | Low pressure industrial waste gas burner |
| CN104075319A (en) * | 2014-06-19 | 2014-10-01 | 广东正鹏生物质能源科技有限公司 | Biomass gas combustion device used for industrial boiler |
| CN106122946A (en) * | 2016-08-31 | 2016-11-16 | 重庆赛迪热工环保工程技术有限公司 | A kind of Flat Flame Burner |
| CN210568406U (en) * | 2019-08-23 | 2020-05-19 | 广州环渝能源科技有限公司 | Porous biomass gas low-nitrogen combustor |
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| Publication number | Publication date |
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| CN112413583A (en) | 2021-02-26 |
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