CN205664377U - Burner - Google Patents
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- CN205664377U CN205664377U CN201620545962.XU CN201620545962U CN205664377U CN 205664377 U CN205664377 U CN 205664377U CN 201620545962 U CN201620545962 U CN 201620545962U CN 205664377 U CN205664377 U CN 205664377U
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- Prior art keywords
- burner
- natural gas
- section
- passageway
- air
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- 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
Abstract
The utility model discloses a burner belongs to gas burner technical field muddy in advance. The utility model discloses a burner, including lieing in this an internal wind passageway, secondary air channel and natural gas passageway of burner, wind passageway be uniform section passageway section and wealthy passageway section gradually to wind export orientation from a wind import in proper order, around the circumference of a wind passageway at least the distribution have three secondary air channel, the natural gas exit of natural gas passageway and gradually wealthy passageway section feed through, natural gas passageway is delta with the contained angle of uniform section passageway section axis, and 30 <= delta <= 50, gradually the contained angle of two last sides of the axial cross section of wealthy passageway section is beta, and 34 <= beta <= 60, all secondary air channel are gamma with the contained angle of uniform section passageway section axis, and 0 <= gamma <= 10. The utility model provides a synthesize the good burner who is used for the gas combustion of burning behavior.
Description
Technical field
This utility model belongs to the gas burner technical field of premix, in particular, relates to a kind of burner, the suitableeest
Share in regenerative burner system.
Background technology
Abroad it is referred to as the heat accumulating type high-temperature air burning skill of HTAC (High Temperature Air Combustion)
Art, is the combustion technology of a kind of novel concept that eighties of last century abroad proposes.This technology is Mist heat recovering and efficient burning
And the technology such as low NOx organically combines, combustion air is preheated to 800～1000 from room temperature by high-efficiency thermal storage material by it
DEG C high temperature, it is achieved thereby that the limit is energy-conservation, the limit reduce NOx discharge dual purpose.
Although regenerative high temperature combustion technology technology is the new and high technology of energy-saving and environmental protection.But domestic natural gas heat accumulating type
Burner does not also have the structure of comparative maturity.Natural gas and combustion air use traditional exterior mixing structure at present, the most natural
Gas can not be sufficiently mixed with combustion air in combustion, causes the methane cracking in natural gas to produce carbon black and waste the energy,
In Theoretical Calculation and actually detected, the flue gas of conventional natural gas heat-accumulating burner burning containing 8～10% imperfect combustion
Thing.
For the problems referred to above, the technical scheme being correlated with in prior art is open, such as patent publication No.: CN
202647771U, publication date: on January 2nd, 2013, invention and created name is: a kind of natural gas passage circumferentially distributed burner, should
Application case discloses a kind of natural gas passage circumferentially distributed burner, belongs to the gas burner technical field not premixed.This Shen
The burner of case please include burner block body, combustion air passage and natural gas passage, combustion air passage is tubular structure, is positioned at
The inside of burner block body；Natural gas passage around combustion air passage circumferentially distributed two or more, this natural gas lead to
Road is embedded in burner block body, and the spout section of natural gas Channel front end and the central axial angle of combustion air passage are α, and 0 °
≤ α≤90 °, spout section is arranged in the same direction with combustion air passage, and is converged in front end of burner.The burner of this application case is to natural gas
There is the effect of refinement shunting, it is possible to increase natural gas and the contact area of combustion air, greatly reduce the incomplete of natural gas
Quantity combusted.But, finding after the burner of actually used this application case, the burner of this application case there is also following being difficult to and overcomes
Defect: (1) although the circumferentially distributed structure of natural gas passage is conducive to natural gas to mix with combustion air in this application case, but
Being that the burner of this application case belongs to the gas burner not premixed, during burning, the mixing situation of natural gas and combustion air is the most not
Preferable；(2) in this application case Imported gas house steward be divided into that two or more are embedded in burner block body elongated natural
Gas passage, although disperseed natural gas, natural gas is had refinement shunting effect, but actually used during find elongated
Natural gas passage in be susceptible to blocking, have a strong impact on the direct motion of production；(3) burner of this application case is in use, flame
Shape cannot effectively control, often such that the temperature near burner is higher, thus cause service life of burner limited.
The burner that can regulate the length of flame, such as patent publication No. be also disclosed in prior art: CN 201093500Y,
Publication date: on July 30th, 2008, invention and created name is: a kind of natural gas combustion nozzle capable of adjusting flame, it is adjustable that this application case discloses one
Flame natural gas combustion nozzle, the parts such as including sleeve pipe, air hose, natural gas jet pipe, backboard, burner shell, insert in natural gas jet pipe
Having central air hose, be externally provided with fixing windband and activity windband at natural gas jet pipe, reducer pipe sized by activity windband structure, it is little
Diameter tube is enclosed within the natural gas jet pipe outside backboard, and large diameter pipe is enclosed within fixing windband, in fixing windband and activity
Windband lap has a rectangle air port.Wherein on activity windband narrow tube, it is provided with windband circle and ring for fixing, at wind
Lasso is provided with two handles, is provided with bolt and fixes activity windband in ring for fixing, and this nozzle structure is simple, degree of regulation is high.But
It is that the burner of this application case there is also following weak point in actual use: the shape of natural gas flame in combustion
It is difficult to keep stable, so that the temperature field in burner hearth is difficult to settle out, it is impossible to meet the occasion that heating requirements is higher.
Also such as patent publication No.: CN 1431143A, invention and created name is: multichannel gas by partial oxidation of natural system synthesizes
Gas burner；Patent publication No.: CN 2077953U, invention and created name is: nozzle of burner for combustion of gas.Technique scheme is for burning
Mouth structure is transformed, and all based on improving the mixing situation of fuel and air, its structure is complex, it has not been convenient to safeguards and makes
Make, additionally remain a need for improving further in the regulation problems such as flame temperature, length, combustion range.
In sum, how to design a kind of comprehensive combustion burner for gas combustion of good performance, be existing skill
Art is needed badly the technical barrier of solution.
Utility model content
1. utility model to solve the technical problem that
The purpose of this utility model is to overcome the deficiency of existing burner, it is provided that a kind of comprehensive combustion use of good performance
Burner in gas combustion.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that this utility model provides is:
Burner of the present utility model, including burner body, also includes being positioned at the First air passage of burner body, secondary wind
Passage and natural gas passage, described First air passage is the wealthyest channel section near First air exit, leads to around described First air
The circumference in road is at least distributed three secondary air channels, with the wealthyest described channel section at the gas outlet of described natural gas passage
Connection.
Further improve as this utility model, described First air passage from First air import to First air exporter
To being followed successively by uiform section channel section and the wealthyest channel section, described natural gas passage and the angle of described uiform section channel section axis
For δ, and 30 °≤δ≤50 °.
Further improve as this utility model, the angle of two sides on the axial cross section of the wealthyest described channel section
For β, and 34 °≤β≤60 °.
Further improve as this utility model, all secondary air channels from secondary air inlet to secondary wind exporter
To moving closer to.
Further improve as this utility model, all secondary air channels and described uiform section channel section axis
Angle is γ, and 0 °≤γ≤10 °.
Further improving as this utility model, the caliber of described uiform section channel section isDescribed
The caliber of secondary air channel isThe caliber of described natural gas passage is
3. beneficial effect
The technical scheme using this utility model to provide, compared with prior art, has the advantages that
(1) burner of the present utility model, it is designed with First air passage, circumferentially distributed at least three around First air passage
Secondary air channel, secondary wind is divided into the ejection of multiply thread, adds contacting of secondary wind and natural gas by a plurality of secondary air channel
Area, by natural gas precombustion and natural gas second-time burning, efficiently solves the problem that combustion of natural gas is insufficient, improves
The effective rate of utilization of gas fuel.
(2) burner of the present utility model, angle is δ, angle β and the design of angle γ, has efficiently controlled natural gas fire
The shape of flame, becomes stable temperature field at freeze profile, meets the heating requirements of various occasion；Meanwhile, flame combustion is overcome
The local temperature that region is excessively concentrated and caused is too high, largely avoided the phenomenon that facility, blank etc. in burner, stove are burnt,
It it is a kind of comprehensive combustion gas combustion of good performance burner.
(3) burner of the present utility model is applied to natural gas heat accumulating type Forge Heating furnace rear, and solving fuel can not be abundant
The problem of burning, after burner uses, energy consumption per ton steel is than traditional burner energy-conservation 25～more than 30%, and steel per ton fires gas cost
Control 50～65m3；Blank forging iron scale amount reduces half, even flame, soft, stable；Nitrogen oxygen in flue gas after burning
Compound discharge capacity NOx≤200mg/m3, SO2≤100mg/m3, it is a kind of significant environmental protection equipment of energy-saving effect.
(4) burner of the present utility model, natural gas passage, First air passage, secondary air channel are all embedded in burner body
In, decrease external force and destroy natural gas passage and the possibility of combustion air passage, even if leading at natural gas passage and combustion air
Under conditions of the equal scaling loss in road, burner body remains to be continuing with, burner low cost of manufacture, high life, and side easy to maintenance
Just.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the burner of embodiment 1；
Fig. 2 is the A-A sectional structure schematic diagram in Fig. 1；
Fig. 3 is the B-B sectional structure schematic diagram in Fig. 1.
Label declaration in schematic diagram: 1, burner body；2, First air passage；21, First air import；22, First air goes out
Mouthful；3, secondary air channel；31, secondary air inlet；32, secondary wind outlet；4, natural gas passage；41, gas inlet；42, sky
So gas outlet.
Detailed description of the invention
For further appreciating that content of the present utility model, in conjunction with the accompanying drawings and embodiments this utility model is described in detail.
Embodiment 1
In conjunction with Fig. 1～3 (Fig. 1 be in Fig. 2 along C to view), the burner of the present embodiment, including burner body 1 and position
First air passage 2, secondary air channel 3 and natural gas passage 4 in burner body 1, First air passage 2 is from First air import 21
Export 22 directions to First air to be followed successively by uiform section channel section and the wealthyest channel section (the wealthyest channel section is horn mouth hollow knot
Structure), (three or the secondary air channel of more than three circumference around First air passage 2 is at least distributed three secondary air channels 3
3 pairs of secondary wind play the effect of refinement shunting), connect with the wealthyest channel section at the gas outlet 42 of natural gas passage 4.Its
In, natural gas passage 4 is δ with the angle of above-mentioned uiform section channel section axis, and 30 °≤δ≤50 °；The axle of the wealthyest channel section
On cross section, the angle of two sides is β, and 34 °≤β≤60 ° (i.e. the opening angle of horn mouth hollow structure is β)；All two
Secondary wind passage 3 exports 32 directions from secondary air inlet 31 to secondary wind and moves closer to, and meanwhile, all secondary air channels 3 cut with waiting
The angle of channel section axis, face is γ, and 0 °≤γ≤10 °.The caliber of uiform section channel section isSecondary
The caliber of wind passage 3 isThe caliber of natural gas passage 4 is
During use, First air is entered inside burner by the First air import 21 of First air passage 2, within entrance burner
Natural gas premixes and is formed primary combustion (wherein, natural gas gas inlet 41 from burner body 1 in the wealthyest channel section
Enter inside burner), the natural gas after a premixed combustion enters burner hearth inside and exports the two of 32 ejections with secondary wind
Secondary wind mixes again, forms second-time burning.Wherein, during combustion of natural gas, by regulation First air and the flow of secondary wind,
Following effect can be reached: 1) realize fuel and burn completely；2) regulation controls peak flame temperature, prevents from burning steel, reduces scaling loss；
3) the regulation length of flame, makes fire box temperature uniform.
For the burner of the gas combustions such as natural gas in prior art, although kind form is varied, but mostly deposits
The shape of flame is difficult to keep stable defect in combustion, so that the temperature field in burner hearth is difficult to settle out,
The occasion that heating requirements is higher cannot be met.Inventor, through actually used discovery, the burner of the present embodiment, uses techniques below
Feature: " circumference around First air passage 2 is at least distributed three secondary air channels 3, the gas outlet 42 of natural gas passage 4
Place connects with the wealthyest channel section, and natural gas passage 4 is δ with the angle of uiform section channel section axis, and 30 °≤δ≤50 °；Gradually
On the axial cross section of wealthy channel section, the angle of two sides is β, and 34 °≤β≤60 °；All secondary air channels 3 enter from secondary wind
Mouth 31 exports 32 directions to secondary wind and moves closer to, meanwhile, and all secondary air channels 3 and the angle of uiform section channel section axis
It is γ, and 0 °≤γ≤10 ° ", it is possible to the flame spraying into burner hearth is kept relative stability in shape, thus in burner hearth
Form stable temperature field, meet the heating requirements of various occasion.Make a concrete analysis of as follows: around First air passage 2 circumference extremely
Less distribution three secondary air channels 3 so that secondary wind is disperseed in multiple secondary air channels 3, meanwhile, secondary air channel 3 in
Being obliquely installed of certain angle, the natural gas after a premixed combustion enters burner hearth, first shape in the wealthyest channel section
Becoming the flow direction expanded laterally, then in burner hearth, the natural gas after multiply secondary wind and a premixed combustion is that the angle of intersection is mixed
On the one hand close, be conducive to the abundant burning of natural gas, more importantly, use above-mentioned form and the angle of intersection by secondary wind with
Natural gas mixed combustion after premixed combustion (natural gas after i.e. one time premixed combustion in the wealthyest channel section by First air
Promote and outwards flow in adjacent circumferential expansion, and multiply secondary wind is circumferentially contracted flowing), it is possible to combustion zone is controlled certain
In the range of, stablize the burning of natural gas, efficiently control the shape of combustion flame, it is to avoid flame rocks the appearance of situation.Enter
One step, connect with the wealthyest channel section at the gas outlet 42 of natural gas passage 4, natural gas passage 4 and uiform section channel section
The angle of axis is δ, and 30 °≤δ≤50 °, and natural gas and First air are above-mentioned form and angle carries out pre-mixing combustion, make
Precombustion regional stability outside secondary combustion region is carried out, overcome flame burn area and excessively concentrate and the office that causes
Portion's temperature is too high, largely avoided the phenomenon that facility, blank etc. in burner, stove are burnt.
The burner of the present embodiment, it is designed with First air passage 2, circumferentially distributed at least three two around First air passage 2
Secondary wind passage 3, secondary wind is divided into the ejection of multiply thread, adds contacting of secondary wind and natural gas by a plurality of secondary air channel 3
Area, by natural gas precombustion and natural gas second-time burning, efficiently solves the problem that combustion of natural gas is insufficient, improves
The effective rate of utilization of gas fuel.
The burner of the present embodiment, angle is δ, angle β and the design of angle γ, has efficiently controlled the shape of Flame of Natural Gas
Shape, becomes stable temperature field at freeze profile, meets the heating requirements of various occasion；Meanwhile, flame burn area mistake is overcome
The local temperature caused in concentration is too high, largely avoided the phenomenon that facility, blank etc. in burner, stove are burnt, and is a kind of
Comprehensive combustion gas combustion of good performance burner.
The burner of the present embodiment is applied to natural gas heat accumulating type Forge Heating furnace rear, and solving fuel can not be clean-burning
Problem, after burner uses, energy consumption per ton steel is than traditional burner energy-conservation 25～more than 30%, and steel per ton combustion gas cost controls
50～65m3；Blank forging iron scale amount reduces half, even flame, soft, stable；Nitrogen oxides in effluent row after burning
High-volume NOx≤200mg/m3, SO2≤100mg/m3, it is a kind of significant environmental protection equipment of energy-saving effect.
The burner of the present embodiment, natural gas passage 4, First air passage 2, secondary air channel 3 are all embedded in burner body 1
In, decrease external force and destroy natural gas passage and the possibility of combustion air passage, even if leading at natural gas passage and combustion air
Under conditions of the equal scaling loss in road, burner body 1 remains to be continuing with, burner low cost of manufacture, high life, and side easy to maintenance
Just.
In concrete the present embodiment, secondary air inlet 31 and secondary wind outlet 32 for secondary air channel 3 position, and two
The end face center of circle of secondary wind inlet 31 is distributed on the circumference of concentric circular a, and this concentric circular a is with burner body 1 center as the center of circle, same
Circle a is a diameter of for the heartSecondary wind outlet 32 the end face center of circle be distributed on the circumference of concentric circular b, this concentric circular b with
Burner body 1 center is the center of circle, and concentric circular b is a diameter ofArticle 8, secondary air channel 3 divides along the surrounding of First air passage 2
Cloth, and the angle of 8 secondary air channels 3 and uiform section channel section axis is 5 °, natural gas passage 4 and uiform section channel section
The angle of axis is 40 °, and on the axial cross section of the wealthyest channel section, the angle of two sides is 47 °.The pipe of uiform section channel section
Footpath isThe caliber of secondary air channel 3 isThe caliber of natural gas passage 4 is
The manufacture method of the burner of the present embodiment, comprises the following steps:
(1) molding: according to stove size and use requirement, design burner, structure and size according to burner make mould
Tool；
(2) cast: according to using fuel type and burner hearth maximum temperature and stove behaviour in service, by regulation Al2O3Content
And auxiliary material content, make the bulk density of burner, compressive resistance, rupture strength, Linear change rate, maximum operation (service) temperature and thermal shock resistance
Meeting use requirement etc. performance, so that it is determined that the concrete formula of castable, wherein, the raw material of castable includes corundum and mullite；
Preparation castable, pours into a mould, and casting process carries out ram-jolt and removes shrinkage cavity.
(3) it is dried: the demoulding after natural air drying 22～24h, it is desirable to the smooth zero defect of smooth surface, continues natural air drying 120
～144h；
(4) roasting: burner roasting, is raised to 700～720 through 72～120h from room temperature according to material property and burner size
DEG C, it is incubated 4～4.5h, eventually passes 22～24h and be cooled to room temperature.
Embodiment 2
The burner of the present embodiment, its structure is substantially the same manner as Example 1, and its difference is: 3 secondary air channels 3
Along First air passage 2 left, right, lower in the distribution of three sides, 3 secondary air channels 3 and uiform section channel section axis
Angle be 4 °, natural gas passage 4 is 35 ° with the angle of uiform section channel section axis, the axial cross section of the wealthyest channel section
The angle of upper two sides is 40 °.The caliber of uiform section channel section isThe caliber of secondary air channel 3 is
The caliber of natural gas passage 4 is
Embodiment 3
The burner of the present embodiment, its structure is substantially the same manner as Example 1, and its difference is: 4 secondary air channels 3
It is symmetrically distributed on four sides of First air passage 2；Article 4, secondary air channel 3 is equal with the angle of uiform section channel section axis
Being 6 °, natural gas passage 4 is 45 ° with the angle of uiform section channel section axis, two sides on the axial cross section of the wealthyest channel section
The angle on limit is 50 °.The caliber of uiform section channel section isThe caliber of secondary air channel 3 isNatural gas leads to
The caliber in road 4 is
Schematically being described this utility model and embodiment thereof above, this description does not has restricted, accompanying drawing
Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So, if this area
Those of ordinary skill enlightened by it, creating in the case of objective without departing from this utility model, designing without creative
The frame mode similar to this technical scheme and embodiment, all should belong to protection domain of the present utility model.
Claims (6)
1. a burner, including burner body (1), it is characterised in that: also include the First air passage being positioned at burner body (1)
(2), secondary air channel (3) and natural gas passage (4), described First air passage (2) is the wealthyest near First air outlet (22) place
Channel section, the circumference around described First air passage (2) is at least distributed three secondary air channels (3), described natural gas passage
(4) gas outlet (42) place connects with the wealthyest described channel section.
Burner the most according to claim 1, it is characterised in that: described First air passage (2) from First air import (21) to
First air outlet (22) direction is followed successively by uiform section channel section and the wealthyest channel section, and described natural gas passage (4) is cut with described grade
The angle of channel section axis, face is δ, and 30 °≤δ≤50 °.
Burner the most according to claim 2, it is characterised in that: two sides on the axial cross section of the wealthyest described channel section
Angle is β, and 34 °≤β≤60 °.
Burner the most according to claim 3, it is characterised in that: all secondary air channels (3) from secondary air inlet (31) to
Secondary wind outlet (32) direction moves closer to.
Burner the most according to claim 4, it is characterised in that: all secondary air channels (3) and described uiform section channel section
The angle of axis is γ, and 0 °≤γ≤10 °.
6. according to the burner described in claim 2～5 any one, it is characterised in that: the caliber of described uiform section channel section isThe caliber of described secondary air channel (3) isThe caliber of described natural gas passage (4) is
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620545962.XU CN205664377U (en) | 2016-06-01 | 2016-06-01 | Burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620545962.XU CN205664377U (en) | 2016-06-01 | 2016-06-01 | Burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205664377U true CN205664377U (en) | 2016-10-26 |
Family
ID=57156617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620545962.XU Active CN205664377U (en) | 2016-06-01 | 2016-06-01 | Burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205664377U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889930A (en) * | 2016-06-01 | 2016-08-24 | 马鞍山天洲节能工程科技有限公司 | Nozzle and manufacturing method thereof |
| CN111349468A (en) * | 2018-12-24 | 2020-06-30 | 国家能源投资集团有限责任公司 | Burner, feeding device, gasification furnace and gasification system |
| CN111349470A (en) * | 2018-12-24 | 2020-06-30 | 国家能源投资集团有限责任公司 | Burner and gasification furnace with same |
| CN111349469A (en) * | 2018-12-24 | 2020-06-30 | 国家能源投资集团有限责任公司 | Burner, feeding device, gasification furnace and gasification system |
| CN111609402A (en) * | 2020-05-09 | 2020-09-01 | 北京泷涛环境科技有限公司 | Burner and gas boiler |
-
2016
- 2016-06-01 CN CN201620545962.XU patent/CN205664377U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889930A (en) * | 2016-06-01 | 2016-08-24 | 马鞍山天洲节能工程科技有限公司 | Nozzle and manufacturing method thereof |
| CN105889930B (en) * | 2016-06-01 | 2018-12-14 | 马鞍山天洲节能工程科技有限公司 | A kind of burner and its manufacturing method |
| CN111349468A (en) * | 2018-12-24 | 2020-06-30 | 国家能源投资集团有限责任公司 | Burner, feeding device, gasification furnace and gasification system |
| CN111349470A (en) * | 2018-12-24 | 2020-06-30 | 国家能源投资集团有限责任公司 | Burner and gasification furnace with same |
| CN111349469A (en) * | 2018-12-24 | 2020-06-30 | 国家能源投资集团有限责任公司 | Burner, feeding device, gasification furnace and gasification system |
| CN111349468B (en) * | 2018-12-24 | 2021-04-13 | 国家能源投资集团有限责任公司 | Burner, feeding device, gasification furnace and gasification system |
| CN111349469B (en) * | 2018-12-24 | 2021-04-23 | 国家能源投资集团有限责任公司 | Burner, feeding device, gasification furnace and gasification system |
| CN111609402A (en) * | 2020-05-09 | 2020-09-01 | 北京泷涛环境科技有限公司 | Burner and gas boiler |
| CN111609402B (en) * | 2020-05-09 | 2022-09-16 | 北京泷涛环境科技有限公司 | Burner and gas boiler |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |