CN207394824U - High stability, short flamed low NOx, CO burner - Google Patents
High stability, short flamed low NOx, CO burner Download PDFInfo
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- CN207394824U CN207394824U CN201721291800.9U CN201721291800U CN207394824U CN 207394824 U CN207394824 U CN 207394824U CN 201721291800 U CN201721291800 U CN 201721291800U CN 207394824 U CN207394824 U CN 207394824U
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- refractory brick
- burner
- shell
- high stability
- low nox
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Abstract
The utility model is related to a kind of high stability, short flamed low NOx, CO burners.It includes refractory brick, Y shape air gun, shell, gas collecting tube, air inlet and aditus laryngis plate, refractory brick is fixed at the top of shell, refractory brick includes the first refractory brick and the second refractory brick, the inclined-plane of first refractory brick is high inclination-angle inclined-plane, the inclined-plane of second refractory brick is small inclination inclined-plane, first refractory brick includes concave flame stabilization ring, orthogonal stable flame hole is provided on first refractory brick, the smoke backflow hole of radial direction is provided on second refractory brick, Y shape air gun is provided in refractory brick, Y type air guns are fixed at the bottom of shell, the head of Y shape air gun is provided with primary nozzle and secondary nozzle, the bottom of Y shape air gun is connected with gas collecting tube, center sets aditus laryngis plate in refractory brick, aditus laryngis plate and refractory brick and shell are coaxially arranged.A kind of high stability of the utility model, short flamed low NOx, CO burner, combustion stability is high, the length of flame is short.
Description
Technical field
The utility model is related to a kind of burner more particularly to a kind of high stability, short flamed low NOx, CO burner,
Belong to technical field of combustion equipment.
Background technology
Nitrogen oxides has become the pollution of environment one with the serious global problem of benefit, its influence master to air
There is acid rain, also assist in the floating dust to be formed in air.NOx is the general designation when oxide, important dirt of the nitrogen oxides as air
One of object is contaminated, includes N2O、NO、N2O2、N2O3、NO2、N2O4And N2O5Etc. several, wherein generating pollution to air and being mainly
NO and NO2.The NOx initially generated in fuel combustion process has 90% the above are NO, but NO in an atmosphere easily in air
Oxygen reacts, and generates NO2, therefore in air NOx generally with NO2Form exist.Under ultraviolet light, NO2Meeting and air
In hydrocarbon effect, generate photochemical fog and ozone；The acid rain and photochemical fog of generation can cause crops and
Forest large area is withered, and acid rain can also corrode building and equipment, and photochemical fog has apparent carcinogenesis, surface layer
Middle ozone meeting Central nervous causes greatly to injure, it can be seen that, the elimination of NOx also becomes Air Pollution Control field
Hottest point problem.
Carbon monoxide（CO）For colourless, odorless, nonirritant gas.Molecular weight 28.01, density 1.250g/l.Air
The mixed explosion limit is 12.5%~74%, and carbon monoxide can combine after entering human body with the hemoglobin in blood, and then make
Hemoglobin cannot be combined with oxygen, anoxic occur so as to cause body tissue, cause human body death by suffocation.CO is mainly due to combustion
Expect that CH compounds and oxygen mix in air are insufficient in gas, the two time of contact is long in other words（Relatively）, CH keys do not flutter also
Enough O atoms are obtained, have just come into oxygen rarefied zone, at this time due to no sufficient concentrations of comburant oxygen, will be had big
CO is measured to generate.In addition fire box temperature is also a key factor, and the self-ignition point of CO is about 650 DEG C, if fire box temperature reaches 650
DEG C or more, even if the imperfect combustion of part occurs, CO remains able to spontaneous combustion, but the tubular heater of some devices, according to not
With the technological requirement of operating mode, fire box temperature is only 400 DEG C -500 DEG C sometimes, which is far below 650 DEG C, is resulted in big in flue gas
It measures CO to generate, and is discharged into air, the rising of CO concentration means the decline of the efficiency of furnace, can increase the consumption of fuel.
In petrochemical industry, newest national standard GB31570-2015《Petroleum refining industry pollutant emission standard》With
GB31571-2015《Petro chemical industry pollutant emission standard》Stringent regulation has been made to the discharge of nitrogen oxides and CO,
The strict requirements that there is the discharge of CO in each enterprise.
Existing burner, usual primary fuel account for 10%-20%, but less just because of primary fuel accounting, at certain
A little operating modes, for example in the case that fuel atmospheric pressure is higher or coefficient of excess air is very high, showing for combustion instability easily occurs
As in addition de- fire, be especially particularly acute when underrun；Due to the reduction of primary fuel, the increase of secondary fuel,
The addition of oxygen deprivation flue gas so that the length of flame of low-NOx combustor is considerably longer than the non-low-NOx combustor of tradition, about 1.5 times of biography
It unites the non-low-NOx combustor length of flame, when fire box temperature is less than 650 DEG C, CO concentration of emissions are often exceeded, due to the length of flame
Increase so that the top temperature of the relatively low heating furnace of some furnace heights is substantially higher, and the heat absorption of radiant section is reduced, and causes stove
Efficiency declines；Since fire box temperature is relatively low, load is small, and fuel gas jet power is caused to reduce so that fuel gas is mixed with air
It closes and is deteriorated, easily generate substantial amounts of CO at this time, cause its discharge exceeded.
The content of the invention
The purpose of this utility model is to overcome above-mentioned deficiency provides a kind of high stability, short flamed low NOx, CO
Burner.
What the purpose of this utility model was realized in：
A kind of high stability, short flamed low NOx, CO burner, its main feature is that：It is the high stability, short flamed low
NOx, CO burner include refractory brick, Y shape air gun, shell, gas collecting tube, air inlet and aditus laryngis plate, and refractory brick is fixedly installed outside
The top of shell, refractory brick include the first refractory brick and the second refractory brick, and the inclined-plane of first refractory brick is high inclination-angle inclined-plane the
The inclined-plane of two refractory brick is small inclination inclined-plane, and the first refractory brick includes the flame stabilization ring of concave shape, is provided on the first refractory brick mutually
Vertical stable flame hole is provided with the smoke backflow hole of radial direction on the second refractory brick, is provided with Y shape air gun in refractory brick, Y type air guns are consolidated
Surely the bottom of shell is arranged on, the head of Y shape air gun is provided with primary nozzle and secondary nozzle, the bottom of Y shape air gun and gas collection
Pipe is connected, and center sets aditus laryngis plate in refractory brick, and aditus laryngis plate and refractory brick and shell are coaxially arranged.
A kind of high stability of the utility model, short flamed low NOx, CO burner, aditus laryngis edges of boards edge set several larynxs
Oralia hole, the quantity of aditus laryngis plate hole is 8-48, the diameter 5-40mm of aditus laryngis plate hole, and the shape of aditus laryngis plate is circular, square
Or rectangle.
A kind of high stability of the utility model, short flamed low NOx, CO burner, air inlet are arranged on the outer of shell
Side or bottom, when air inlet is arranged on outer casing bottom, air inlet is coaxially arranged with shell.
A kind of high stability of the utility model, short flamed low NOx, CO burner, the inclination angle of inclined plane of the first refractory brick
For 60 ° ~ 85 °, the inclination angle of inclined plane of the second refractory brick is 45 ° ~ 70 °.
Compared with prior art, the beneficial effects of the utility model are：
A kind of high stability of the utility model, short flamed low NOx, CO burner, use the internal structure of special designing
It realizes the technology of fuel staging and flue gas recirculation, air and fuel gas is sufficiently mixed burning, realize low NOx drainage.More
Specifically, we use the spray regime and firebrick structure of special designing, control the hybrid mode of fuel and air, so as to
The entire combustion process of fuel gas is controlled, reaches enhancing flame holding, controls flame height and the discharge of NOx, CO.
There are guiding surface in a kind of high stability of the utility model, short flamed low NOx, CO burner, refractory brick periphery,
It is to promote flame and injection guiding role, aditus laryngis plate increases air velocity, promotes the mixing of air and fuel gas, reduce
Reaction is not engaged in during Smaller load and just escapes into the air gone in flue gas, significant role is played to the generation for reducing CO.
A kind of high stability of the utility model, short flamed low NOx, CO burner, load is small, flows through the flow of nozzle just
Small, the kinetic energy of injection has carried out special designing with regard to small, by the inclined-plane of refractory brick, staggeredly layer-stepping, i.e., big load nozzle corresponds to big
Inclination angle fire resisting inclined-plane, Smaller load nozzle correspond to small inclination inclined-plane, so that it is guaranteed that needing one fuel gas more than air in quirk
Residence time is longer, otherwise the residence time is shorter, and has adjusted the load proportion of intermediate level-one spray gun, contains NOx in flue gas
Amount and CO contents are lower.
Description of the drawings
Fig. 1 is a kind of high stability of the utility model, the schematic diagram of short flamed low NOx, CO burner.
In figure：
Refractory brick 1,
Stable flame hole 1.1,
Flame stabilization ring 1.2,
First refractory brick 1.3,
Second refractory brick 1.4,
Smoke backflow hole 1.5,
Y shape air gun 2,
Primary nozzle 2.1,
Secondary nozzle 2.2,
Shell 3,
Gas collecting tube 4,
Air inlet 5,
Aditus laryngis plate 6,
Aditus laryngis plate hole 6.1.
Specific embodiment
Referring to Fig. 1, the utility model is related to a kind of high stability, short flamed low NOx, CO burners, it includes fire resisting
Brick 1, Y shape air gun 2, shell 3, gas collecting tube 4, air inlet 5 and aditus laryngis plate 6.
Refractory brick 1 includes the first refractory brick 1.3 and the second refractory brick 1.4, and the inclined-plane of first refractory brick 1.3 is to incline greatly
Angle inclined-plane, inclination angle are 60 ° ~ 85 °, and the inclined-plane of the second refractory brick 1.4 is small inclination inclined-plane, and inclination angle is 45 ° ~ 70 °, the first refractory brick
1.3 and second refractory brick 1.4 be one group, be provided with 2-20 groups altogether, 1.3 inside of the first refractory brick is provided with the flame stabilization ring 1.2 of spill,
Orthogonal stable flame hole 1.1 is provided on first refractory brick 1.3, stable flame hole 1.1 is provided with 4-100 groups, the aperture of stable flame hole 1.1
8-20mm, the hole shape of stable flame hole 1.1 is square hole or oblong aperture, and the smoke backflow hole 1.5 of radial direction is provided on the second refractory brick 1.4,
Smoke backflow hole 1.5 has 4-40, and the aperture in smoke backflow hole 1.5 is 20-100mm.
Refractory brick 1 is fixed at the top of shell 3, and Y shape air gun 2 is provided in refractory brick 1, and Y types air gun 2 is fixedly installed
In the bottom of shell 3, the quantity of Y shape air gun 2 is 4-20, and the head of Y shape air gun 2 is provided with primary nozzle 2.1 and secondary spray
Mouth 2.2, the bottom of Y shape air gun 2 are connected with gas collecting tube 4, and the connection mode of Y shape air gun 2 and gas collecting tube 4 is welding or metal hose
Connection or articulation connection, gas collecting tube 4 are connected by flange with external fuel gas pipeline.
Refractory brick 1 and shell 5 are circular, square or rectangle.
Center sets aditus laryngis plate 6 in refractory brick 1, and aditus laryngis plate 6 and refractory brick 1 and shell 3 are coaxially arranged, aditus laryngis plate 6
Diameter 50-500mm, 6 edge of aditus laryngis plate sets several aditus laryngis plate holes 6.1, and aditus laryngis plate hole 6.1 shouts the air pressure of mouth for controlling
Drop, the quantity of aditus laryngis plate hole 6.1 is 8-48, the diameter 5-40mm of aditus laryngis plate hole 6.1, and the shape of aditus laryngis plate 6 is circular, square
Shape or rectangle；Aditus laryngis plate 6 can not also set aditus laryngis plate hole 6.1.
Shell 3 uses ceramic fibre inside holding, and air inlet 5 is arranged on the outside or bottom of shell 3, when being arranged on shell 3
During bottom, air inlet 5 and shell 3 are coaxially arranged, and it is square, rectangle or circle that air inlet 5, which is,.
Mounting means shown in Fig. 1 is installed for furnace bottom, is also not limited to furnace bottom installation, and the utility model is also suitable
In side dress, the mounting means of top dress.
Operation principle：Air enters shell 3 by air inlet 5, and speed increases to the speed of 30-50m/s after aditus laryngis plate 6
Degree, fuel gas then by each branch Y shape air gun 2 of the distribution branch of gas collecting tube 4, are sprayed by primary nozzle 2.1 and secondary nozzle 2.2 to stove
Thorax, with the air mixed combustion from upstream.Primary nozzle 2.1 is sprayed backwards to burner centre, provides the fuel of 5-10%, combustion
Expect that gas along refractory brick internal face uplink, burns, under the action of groove structure, flame exists in the groove of 2 flame stabilization rings 1.2
This forms stable low speed vortex, forms stable flame rings, significantly improves operating limit, while two communicated with groove
Through hole can outwards spray the small flare with 100mm or so, and stable igniting is provided to the secondary fuel from secondary nozzle 2.2
Source.
By the difference of refractory brick bevel angle, the jet angle of secondary nozzle 2.2 is divided into two kinds, and the smaller nozzle in inclination angle provides
The fuel of 30-40%, the larger nozzle in inclination angle provide the fuel of 50-60%, this structure and conventional low-NOx combustor secondary nozzle
The spray regime of single angle high inclination-angle is compared, and bottom flame can be made to obtain more fuel, and due to two kinds of spray angle phases
Mistake distribution can form two hierarchical level flames of height, and overlay region useless, significantly improve the mixing speed of fuel gas and air
Degree shortens the length of flame.
Since secondary nozzle 2.2 is located at burner hearth, under the jet-action of fuel gas, low-pressure area is generated in nozzle adapter, it will
The furnace bottom low temperature oxygen deprivation flue gas of attachment introduces combustion zone along refractory brick inclined-plane, and backflow flue gas has the characteristic of low temperature oxygen deprivation,
Therefore the temperature and response intensity of burner region can be reduced, so as to reduce the production of NOx.
The utility model uses fuel staging, and by fuel gas arrangement of nozzles into a ladder, fuel gas passes sequentially through stepped
Nozzle, be from upstream to downstream and form multiple combustion zones, and using flue gas recirculating technique, that is, utilize the combustion arranged outside fire pot
The negative pressure that material gas jets injection generates, combustion zone is sucked by the oxygen deprivation flue gas to sink to the cold around refractory brick 1, participates in burning, and two
Person's combination can significantly reduce flame peak temperature, therefore can effectively reduce NOx, CO discharge.
The utility model solves the problems, such as that burner combustion is unstable and the length of flame is long.While the utility model is also
A kind of design method of low NOx, CO gas burner is provided, suitable for burners such as tubular heater, incinerator and boilers,
With this design method, flame height can be effectively reduced, about 1.2 times of non-low NOx, CO burner flame of tradition, often
The 80% of low NOx, CO burner flame is advised, and highly stable flame can be obtained, NOx, CO down to 30mg/Nm3 are discharged
Level, performance are substantially better than traditional low NOx, CO burner.
Claims (9)
1. a kind of high stability, short flamed low NOx, CO burner, it is characterised in that：It is the high stability, short flamed low
NOx, CO burner include refractory brick, Y shape air gun, shell, gas collecting tube, air inlet and aditus laryngis plate, and refractory brick is fixedly installed outside
The top of shell, refractory brick include first refractory brick and the second refractory brick in outside, and inclined-plane is to incline greatly on the outside of first refractory brick
Angle inclined-plane, the outside inclined-plane of the second refractory brick is small inclination inclined-plane, the flame stabilization ring of spill is provided on the inside of the first refractory brick, first is resistance to
Orthogonal stable flame hole is provided on firebrick, the smoke backflow hole of radial direction is provided on the second refractory brick, Y shape is provided in refractory brick
Air gun, Y shape air gun are fixed at the bottom of shell, and the head of Y shape air gun is provided with primary nozzle and secondary nozzle, Y shape gas
The bottom of rifle is connected with gas collecting tube, and center sets aditus laryngis plate in refractory brick, and aditus laryngis plate and refractory brick and shell are coaxially arranged.
2. a kind of high stability according to claim 1, short flamed low NOx, CO burner, it is characterised in that：Aditus laryngis
A diameter of 50mm-500mm of plate, aditus laryngis edges of boards edge set several aditus laryngis plate holes, and the quantity of aditus laryngis plate hole is 8-48, aditus laryngis plate
The diameter 5-40mm in hole, the shape of aditus laryngis plate is circular, square or rectangular.
3. a kind of high stability according to claim 1, short flamed low NOx, CO burner, it is characterised in that：Air inlet
Mouth is arranged on the outside or bottom of shell, and when air inlet is arranged on outer casing bottom, air inlet is coaxially arranged with shell, air inlet
For square or rectangle or circle.
4. a kind of high stability according to claim 1, short flamed low NOx, CO burner, it is characterised in that：First
The inclination angle of inclined plane of refractory brick is 60 ° ~ 85 °, and the inclination angle of inclined plane of the second refractory brick is 45 ° ~ 70 °, the first refractory brick and the second fire resisting
Brick is one group, sets 2-20 groups.
5. a kind of high stability according to claim 1, short flamed low NOx, CO burner, it is characterised in that：It is described
Stable flame hole each two hole is one group, and every group of hole is perpendicular, and connects, and can set 4-100 groups, aperture 8mm-20mm, through hole
To be square hole or oblong aperture.
6. a kind of high stability according to claim 1, short flamed low NOx, CO burner, it is characterised in that：It is described
Smoke backflow hole number is 4-40, a diameter of 20mm-100mm.
7. a kind of high stability according to claim 1, short flamed low NOx, CO burner, it is characterised in that：The Y
The quantity of shape air gun is 4-20 branch, and Y shape air gun is connected with gas collecting tube by welding or connection by metal hose or articulation.
8. a kind of high stability according to claim 1, short flamed low NOx, CO burner, it is characterised in that：Shell
Ceramic fibre inside holding is carried with air inlet, import is connected with shell, and penetrates through.
9. a kind of high stability according to claim 1, short flamed low NOx, CO burner, it is characterised in that：Fire resisting
Brick and shell are circular or square or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721291800.9U CN207394824U (en) | 2017-10-09 | 2017-10-09 | High stability, short flamed low NOx, CO burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721291800.9U CN207394824U (en) | 2017-10-09 | 2017-10-09 | High stability, short flamed low NOx, CO burner |
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| Publication Number | Publication Date |
|---|---|
| CN207394824U true CN207394824U (en) | 2018-05-22 |
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ID=62330958
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721291800.9U Active CN207394824U (en) | 2017-10-09 | 2017-10-09 | High stability, short flamed low NOx, CO burner |
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| CN (1) | CN207394824U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664303A (en) * | 2017-10-09 | 2018-02-06 | 江苏焱鑫科技股份有限公司 | High stability, short flamed low NOx, CO burner |
-
2017
- 2017-10-09 CN CN201721291800.9U patent/CN207394824U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664303A (en) * | 2017-10-09 | 2018-02-06 | 江苏焱鑫科技股份有限公司 | High stability, short flamed low NOx, CO burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Low NOx and CO burner with high stability and short flame Effective date of registration: 20220928 Granted publication date: 20180522 Pledgee: Jiangsu Jiangyin Rural Commercial Bank Co.,Ltd. Xinqiao sub branch Pledgor: JIANGSU YANXIN SCI-TECH Co.,Ltd. Registration number: Y2022320010556 |