CN209639004U - A kind of two-stage combustion formula fire row combustor - Google Patents
A kind of two-stage combustion formula fire row combustor Download PDFInfo
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- CN209639004U CN209639004U CN201920011491.8U CN201920011491U CN209639004U CN 209639004 U CN209639004 U CN 209639004U CN 201920011491 U CN201920011491 U CN 201920011491U CN 209639004 U CN209639004 U CN 209639004U
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Abstract
The utility model discloses a kind of two-stage combustion formula fire row combustors, including pedestal and several fiery pieces being set on the base, the gas nozzle being aligned with the fiery piece is provided on pedestal, the gas nozzle is for spraying combustion gas into fiery piece, the combustion gas of injection is able to drive air and enters in fiery piece and form premixed gas, premixed gas can be from the fire hole discharge and burning on fiery piece top, premixed gas in the fire piece is able to carry out anoxycausis, has between each two adjacent fiery pieces for supplementing channel to the auxiliary air of flame supplement air at fire hole.The utility model can be effectively reduced flame temperature, inhibit the generation of nitrogen oxides, it is easy to light a fire and steady flame, the air of supplement can mix once again with the flue gas of not yet after-flame, ensure to burn sufficiently, the power of this fire row combustor can be effectively improved, cooled down without adding cooling water pipe in this fire row combustor, structure is more simple, effectively reduces the discharge amount of nitrogen oxides and carbon monoxide.
Description
Technical field
The utility model relates to fire row combustor fields.
Background technique
Fire row combustor is typically used in the heating such as module furnace, wall-hung boiler, water heater, steam generator, supplying hot water, for steaming
On the device of vapour, pedestal and several fiery pieces being disposed in parallel on pedestal, the combustion that setting is aligned with fiery piece on pedestal are generally included
Gas jets, gas nozzle spray combustion gas into the blast tube of fiery piece, in the process, using injection principle, are able to drive week
The air enclosed enters blast tube and combustion gas mixing, and mixed gas is discharged from the fire hole of fiery piece and is burnt later.
In recent years, since environmental issue is more and more severeer, most stringent of boiler is formally implemented on April 1st, 2017 in Beijing
Discharged nitrous oxides standard, it is desirable that the reduced value < 30mg/ that newly constructed boiler nitrogen oxide emission is 3.5% in benchmark oxygen content
m3While CO emission reduced value < 95mg/m3, subsequent multiple cities and area enact and enforce Beijing standard successively.
Main heating equipment of the burner as boiler, is the main source of boiler air pollution emission, selects more low NOx row
Burner high-volume is the main means for reducing boiler air pollution emission, energy saving to greatest extent and burner weight
Want performance indicator.
The discharge amount of nitrogen oxides and carbon monoxide depend primarily on fuel gas buring it is abundant whether, combustion gas full combustion is then
The discharge of nitrogen oxides and carbon monoxide can be effectively reduced.Traditional single injector fire row combustor is difficult to ensure oxygen and combustion gas
Accurate mixed proportion occur at present therefore, it is difficult to control the discharge amount of nitrogen oxides and carbon monoxide through high-precision cipher telegram
The all-premixing burner that sub-control system control combustion gas and air are premixed in full premix ratio, burning nature is abundant, chemistry
Incomplete combustion loss is less, and the thermal efficiency is high, and nitrogen oxide emission can accomplish < 30mg/m3, carbon monoxide < 95mg/m3, row
High-volume fully meet requirement.Although all-premixing burner can fully meet the atmosphere pollution of newly constructed boiler in terms of energy-saving and environmental protection
Discharge standard, but to guarantee that the stability of full premix combustion controls it is necessary to carry out accurately ratio to combustion gas and air simultaneously,
This is the high nonlinear Control of difficulty.In combustion, the ratio control of combustion gas and air will definitely not for all-premixing burner
Two kinds of situations occur: if premix air is insufficient, and not having Means of Secondary Air Supplement, that is, anoxycausis, carbon monoxide emission
Amount will be substantially increased, the bad reason of energy-saving effect that here it is current most of full premix boilers in actual use it
One: if premix air is excessive, that is, cross and premix, detonation is easy when igniting.The steady flame problem of full premix combustion is another
Problem is difficult to stablize flame using the fire hole structure that mechanical means is processed, and almost global all-premixing burner is all to use
Metallic fiber establishment net package resistant to high temperature fire hole surface carries out steady flame, and the method for this steady flame of micropore is very effective, but at
This is very high, and service life is short, is expensive vulnerable part, and metallic fiber establishment net blocking in order to prevent influences burning, just necessary
Combustion gas is strictly filtered and air-filtering is handled, this not only adds the operating costs of boiler, and influence whether air-fuel ratio
Stability.Head construction is more complicated and heavy to prevent tempering phenomenon, has biggish noise in high pressure, high load capacity
The shortcomings that being all all-premixing burner.
Referring to Fig.1, this kind of single injector fire row combustor is the relatively early fire row combustor for utilizing injection principle, passes through pedestal
Gas nozzle 11 on 10 sprays combustion gas and is mixed to drive air to enter fiery piece 20, is discharged and burns from fire hole 21 later,
Usually set 70% hereinafter, premixed gas can not be lighted for the premix degree of air and combustion gas, by two-phase fire piece 20 it
Between larger spacing supplement air to burning, the flame combustion area under same dimensions will be influenced in this way, from
And the watt level of fire row combustor is influenced, single injector fire row combustor combustion flame height and insufficient, carbon monoxide and nitrogen oxygen
Compound is all very high.
Referring to Fig. 2 and Fig. 3, this kind of all-premixing burner is that the another kind occurred in the recent period is burnt using the fire row of injection principle
Device equally sprays combustion gas to fiery piece 20 by the gas nozzle 11 on pedestal 10 and is mixed to drive air to enter fiery piece 20,
It is discharged and burns from fire hole 21 later, this burner is reached by the jet velocity of regulating gas and the absorbing quantity of air-introduced machine
Nitrogen oxides and carbon monoxide can be equally greatly reduced to the of less demanding of control precision in the full premix of air and combustion gas
Discharge amount, however the nitrogen oxides of this fire row combustor and the discharge amount of carbon monoxide are still not ideal enough, cannot pass through state
The index of the most stringent newly constructed boiler atmosphere pollutants emission standards of family, simultaneously because this fire row combustor is using full premix combustion
Burning mode, without in addition supplement air, each fire piece 20 is close together, and causes heat dissipation effect bad, needs to add water cooling tube 40
Cooling down, water cooling tube 40 can occupy the space of fiery piece 20 again, so that the combustion gas runner 23 of fiery piece 20 can only be arranged by two sides, shadow
Ring premixed flow the uniformity, so as to cause flame be difficult to uniformly it is contour, be easy to cause the phenomenon that partial combustion is insufficient,
Also it is difficult to increase gas nozzle 11 and combustion gas runner 23, is unfavorable for improving the discharge of nitrogen oxides and carbon monoxide.
Utility model content
To solve the above-mentioned problems, the purpose of this utility model is to provide a kind of structures simply, can effectively reduce nitrogen
The discharge amount of oxide, energy-saving and environment-friendly two-stage combustion formula fire row combustor.
The utility model be solve its technical problem and the technical solution adopted is that:
A kind of two-stage combustion formula fire row combustor is arranged on pedestal including pedestal and several fiery pieces being set on the base
There is the gas nozzle being aligned with the fiery piece, for the gas nozzle for spraying combustion gas into fiery piece, the combustion gas of injection being capable of band
Dynamic air enters in fiery piece and forms premixed gas, and premixed gas can be described from the fire hole discharge and burning on fiery piece top
Premixed gas in fiery piece is able to carry out anoxycausis, has between each two adjacent fiery pieces for supplementing air to flame at fire hole
Auxiliary air supplement channel.
Preferably, the premix degree of the premixed gas in the fiery piece is greater than or equal to 85% and less than 95%.
Preferably, auxiliary air spaced a distance and that formation is described supplements channel between each two adjacent fiery pieces.
Preferably, separated by a distance between each two adjacent fiery pieces is 1mm to 3mm.
Preferably, the locating convex block with lateral protrusions on the side wall of the fiery piece, the convex of each two adjacent fiery on pieces
Block abuts against so that two adjacent fiery pieces are at a distance.
Preferably, the top plate of the fiery piece is V-shaped, and the left part and right part and in side of top plate is arranged in the fire hole
To strip.
Preferably, the fiery piece includes matrix and fire hole part, and the top of matrix is arranged in the fire hole part, matrix
On side wall have recessed heat dam, the lower inner wall of the heat dam with it is at a distance above and below the top surface of fire hole part, it is described
The top of the fire hole part is arranged in fire hole.
The beneficial effects of the utility model are: the combustion gas of gas nozzle injection passes through injection principle band in the utility model
Dynamic air, which enters, forms premixed gas in fiery piece, and the premixed gas is able to carry out anoxycausis, can be effectively reduced flame temperature
Degree, inhibits the generation of nitrogen oxides, and is easy to light a fire and steady flame, after lighting premixed gas at fire hole, each two adjacent fiery pieces it
Between auxiliary air supplement channel flame can be given to supplement air, air of these supplements can be with the flue gas of not yet after-flame once again
Secondary firing is completed in mixing, it is ensured that burning is abundant, thus, it is possible to which the discharge of nitrogen oxides is effectively reduced, needed for second-time burning
Air is less, therefore corresponding auxiliary air supplement channel will not occupy excessive space, can effectively improve the combustion of this fire row
The power of burner, the air-flow that auxiliary air supplements in channel also can play cooling effect to fiery piece, simultaneously because level-one lacks
Oxygen burning reduces flame temperature, and there is no need to add cooling water pipe in this fire row combustor to be cooled down, structure is more simple
Arrangement that is single, enabling the combustion gas injection pipeline of fiery piece more uniform, also can easily increase the quantity of injection pipeline, by
This enable to this fire row combustor burning more sufficiently, flame it is more uniform, further decrease nitrogen oxides and carbon monoxide
Discharge amount.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the structure chart of existing single injector fire row combustor.
Fig. 2 is the structure chart of existing full premix fire row combustor；
Fig. 3 is the structure chart of the fiery piece of existing full premix fire row combustor；
Fig. 4 is the structure chart of the utility model；
Fig. 5 is the partial enlarged view of part A in Fig. 4；
Fig. 6 is the cross-sectional view of the utility model；
Fig. 7 is the partial enlarged view of part B in Fig. 6；
Fig. 8 is the structure chart of the utility model moderate heat piece；
Fig. 9 is the cross-sectional view of the utility model moderate heat piece；
Figure 10 is the bottom view of the utility model；
Figure 11 is the working state schematic representation of the utility model.
Specific embodiment
Referring to Fig. 4 to Figure 11, a kind of two-stage combustion formula fire row combustor, if including pedestal 10 and being arranged on pedestal 10
Fire piece 20 is done, the gas nozzle 11 being aligned with fiery piece 20 is provided on pedestal 10, gas nozzle 11 into fiery piece 20 for spraying
Combustion gas, the combustion gas of injection are able to drive air and enter in fiery piece 20 and form premixed gas, and premixed gas can be from fiery piece 20
The fire hole 21 on top is discharged and burning, and the premixed gas in fiery piece 20 is able to carry out anoxycausis, between each two adjacent fiery pieces 20
With for supplementing channel 30 to the auxiliary air of flame supplement air at fire hole 21.In the utility model, gas nozzle 11 sprays
The combustion gas penetrated drives air to enter fiery piece 20 and forms premixed gas by injection principle, and the premixed gas is able to carry out anoxic combustion
It burns, can be effectively reduced flame temperature, inhibit the generation of nitrogen oxides, and be easy to light a fire and steady flame, lighted at fire hole 21 pre-
After mixed gas, the auxiliary air supplement channel 30 between each two adjacent fiery pieces 20 can supplement air to flame, these supplements
Air can mix once again with the flue gas of not yet after-flame, complete secondary firing, it is ensured that sufficiently, thus, it is possible to nitrogen is effectively reduced for burning
The discharge of oxide, air needed for second-time burning is less, therefore corresponding auxiliary air supplement channel 30 will not occupy
Big space can effectively improve the power of this fire row combustor, and the air-flow that auxiliary air supplements in channel 30 also can be to fire
Piece 20 plays cooling effect, simultaneously because the anoxycausis of level-one reduces flame temperature, there is no need in this fire row combustor
On add cooling water pipe and cooled down, structure is more simple, the cloth for enabling the combustion gas injection pipeline of fiery piece 20 more uniform
It sets, also can easily increase the quantity of injection pipeline, thus, it is possible to make this fire row combustor burn more abundant, flame more
Be it is uniform, further decrease the discharge amount of nitrogen oxides and carbon monoxide.
In the utility model, the premix degree of the premixed gas in fiery piece 20 is greater than or equal to 85% and less than 95%, in this way
It can effectively ensure that the combustion efficiency of premixed gas, and the size in auxiliary air supplement channel 30 can be reduced, so as to
Reach good balance between the two with efficiency of combustion is improved guaranteeing combustion stability, in practical applications, passes through to adjust and fire
Premix degree can be adjusted in the parameters such as the size of gas jets 11, the injection duct size of fiery piece 20, fuel gas injection speed, this
It is all the common technology means in this field a bit, those skilled in the art are easy to be adjusted according to actual needs, herein not
Separately it is described further.Premix degree in the utility model is the premix ratio of relatively complete burning, and premix degree is 100% i.e. air and combustion
The ratio of gas can just be the combustion gas it is believed that for certain volume, premix air for combustion gas completely burned, premix degree 90%
Volume be completely burned needed for volume 90%, and so on, this is also the common metering method of those skilled in the art.
It is spaced a distance between each two adjacent fiery pieces 20 and form auxiliary air supplement channel 30 in the utility model, this
Sample can effectively facilitate processing and assembly, and structure is more simple, using between pedestal 10 and fiery piece 20 gap and pedestal 10
On blow vent 12 i.e. aloow outside air smoothly enter auxiliary air supplement channel 30 in and from bottom to top
Through the piece 20 that over-fires, good heat dissipation effect can be played to fiery piece 20, it certainly, can also be in addition in two adjacent fire in practical application
20 setting air pipelines of piece etc. supplement channel 30 as auxiliary air, it is not limited to this.
In the utility model, separated by a distance between each two adjacent fiery pieces 20 is 1mm to 3mm, can satisfy major part
In the case of the demand supplemented of air, and large effect will not be caused to flame combustion area, can supplement and fire in air
It burns and plays preferable balance between power.Certainly, in practical application, this is separated by a distance to be adjusted flexibly as needed, not
It is confined to this.
There is the locating convex block 22 of lateral protrusions, 22 phase of locating convex block on each two adjacent fiery pieces 20 on the side wall of fiery piece 20
It abuts so that two adjacent fiery pieces 20 are at a distance, easily each fiery piece 20 can be positioned such that obtain each fiery piece 20 in this way
Between be able to maintain scheduled standoff distance, convenient for assembly, also can be improved the structural strength of this fire row combustor.
In the utility model, the top plate of fiery piece 20 is V-shaped, and the left part and right part and in side of top plate is arranged in fire hole 21
To strip, the premixed gas stream in fiery piece 20 can be oriented in this way, be formed to the inclined air-flow in two sides, thus made
Obtaining flame can tilt between two fiery pieces 20, and the air that can make full use of auxiliary air supplement channel 30 carries out second level combustion
It burns, it is ensured that burning sufficiently, can also promote flowing of the air in auxiliary air supplement channel 30.
Fiery piece 20 includes matrix 24 and fire hole part 25, and fire hole part 25 is arranged in the top of matrix 24, on the side wall of matrix 24
With recessed heat dam 26, the lower inner wall of heat dam 26 and at a distance above and below the top surface of fire hole part 25, the setting of fire hole 21
At the top of fire hole part 25, it can effectively slow down the speed that flame heat regulating is transmitted to matrix 24 at fire hole 21 in this way, thus, it is possible to
The temperature of matrix 24 is effectively reduced, avoids matrix 24 from overheating and influences to use, so that high temperature resistance can be used is lower for matrix 24
Material production, can be effectively reduced the cost of the utility model.In the present embodiment, the lower inner wall of heat dam 26 and fire hole part 25 are pushed up
Face between the upper and lower away from for 2mm, excellent heat insulation can be reached, certainly, in practical application, which can spirit as needed
Adjustment living, in addition, in the present embodiment, the front and rear width of heat dam 26 is substantially equal on fire hole part 25 front end fire hole 21 and last
The spacing between fire hole 21 is held, thus, it is possible to adequately be thermally shielded, certainly, and in practical application, the front and rear width of heat dam 26
It can be adjusted flexibly as needed.In the present embodiment, fire hole part 25 is fastened in the mounting groove at 24 top of matrix, facilitates processing and dress
Match, be fixed as well as without using screw, glue etc., is not easy to generate aging deformation because of high temperature, help to improve
The reliability and service life of the utility model.
The foregoing is merely the preferred embodiments of the utility model, as long as realizing the utility model with essentially identical means
The technical solution of purpose belongs within the protection scope of the utility model.
Claims (7)
1. a kind of two-stage combustion formula fire row combustor, several fiery pieces (20) including pedestal (10) and setting on pedestal (10),
The gas nozzle (11) being aligned with the fiery piece (20) is provided on pedestal (10), the gas nozzle (11) is used for fiery piece
(20) combustion gas is sprayed in, the combustion gas of injection is able to drive air and enters in fiery piece (20) and form premixed gas, premixed gas
It can be from fire hole (21) discharge and burning on fiery piece (20) top, it is characterised in that: the premixed gas energy in the fire piece (20)
Anoxycausis is enough carried out, is had between each two adjacent fiery pieces (20) for the auxiliary air to flame supplement air at fire hole (21)
It supplements channel (30).
2. a kind of two-stage combustion formula fire row combustor according to claim 1, it is characterised in that: in the fiery piece (20)
The premix degree of premixed gas be greater than or equal to 85% and less than 95%.
3. a kind of two-stage combustion formula fire row combustor according to claim 1, it is characterised in that: each two adjacent fiery pieces (20)
Between it is spaced a distance and form the auxiliary air and supplement channel (30).
4. a kind of two-stage combustion formula fire row combustor according to claim 3, it is characterised in that: each two adjacent fiery pieces (20)
Between it is separated by a distance be 1mm to 3mm.
5. a kind of two-stage combustion formula fire row combustor according to claim 3, it is characterised in that: the side of the fire piece (20)
There is the locating convex block (22) of lateral protrusions, the locating convex block (22) on each two adjacent fiery pieces (20) abuts against so that two-phase on wall
Adjacent fire piece (20) is at a distance.
6. a kind of two-stage combustion formula fire row combustor according to claim 1, it is characterised in that: the top of the fire piece (20)
Plate is V-shaped, and the left part and right part and in lateral strip of top plate is arranged in the fire hole (21).
7. a kind of two-stage combustion formula fire row combustor according to claim 1, it is characterised in that: fiery piece (20) packet
Matrix (24) and fire hole part (25) are included, the fire hole part (25) is arranged on the top of matrix (24), the side wall of matrix (24)
With recessed heat dam (26), the lower inner wall of the heat dam (26) with it is at a distance above and below the top surface of fire hole part (25),
The top of the fire hole part (25) is arranged in the fire hole (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920011491.8U CN209639004U (en) | 2019-01-02 | 2019-01-02 | A kind of two-stage combustion formula fire row combustor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920011491.8U CN209639004U (en) | 2019-01-02 | 2019-01-02 | A kind of two-stage combustion formula fire row combustor |
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| CN209639004U true CN209639004U (en) | 2019-11-15 |
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| CN201920011491.8U Active CN209639004U (en) | 2019-01-02 | 2019-01-02 | A kind of two-stage combustion formula fire row combustor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695877A (en) * | 2019-01-02 | 2019-04-30 | 刘维 | A kind of two-stage combustion formula fire row combustor |
| CN112944343A (en) * | 2021-02-03 | 2021-06-11 | 台州市迪欧电器有限公司 | Combustor convenient to change gas pipe |
-
2019
- 2019-01-02 CN CN201920011491.8U patent/CN209639004U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695877A (en) * | 2019-01-02 | 2019-04-30 | 刘维 | A kind of two-stage combustion formula fire row combustor |
| CN109695877B (en) * | 2019-01-02 | 2024-07-09 | 刘维 | Two-stage combustion type fire grate burner |
| CN112944343A (en) * | 2021-02-03 | 2021-06-11 | 台州市迪欧电器有限公司 | Combustor convenient to change gas pipe |
| CN112944343B (en) * | 2021-02-03 | 2024-07-12 | 台州市迪欧电器有限公司 | Combustor convenient to change gas pipe |
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