CN207378815U - A kind of linear low nitrogen gas burner - Google Patents
A kind of linear low nitrogen gas burner Download PDFInfo
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- CN207378815U CN207378815U CN201721206348.1U CN201721206348U CN207378815U CN 207378815 U CN207378815 U CN 207378815U CN 201721206348 U CN201721206348 U CN 201721206348U CN 207378815 U CN207378815 U CN 207378815U
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Abstract
A kind of linear low nitrogen gas burner, including combustion air inlet tube (2), combustion gas distributor chamber (3), single-stage combustion head (4), burner inner liner (9), two level ring-type linear nozzle (10), fuel gas inlet pipeline (14) etc.；Combustion air inlet tube (2) one end is connected by the air duct mounting flange (1) of end with combustion fan or air passage, other end connection burner inner liner (9)；Combustion gas distributor chamber (3) is located on the outer wall of combustion air inlet tube (2) and burner inner liner (9), and combustion gas distributor chamber (3) connects respectively with fuel gas inlet pipeline (14), single-stage combustion head (4) and two level ring-type linear nozzle (10)；Two level ring-type linear nozzle (10) includes racemosus spray gun, circumferentially distributed along burner inner liner (9) port；Burner inner liner (9), which is located on the barrel in combustion gas distributor chamber (3), is laid with thermal insulation layer (6).The combustion gas of the utility model can efficiently spread mixing, and NOx generation amount is less than 20mg/m3, to mitigate pollution of the combustion product to air.
Description
Technical field
The utility model is related to a kind of burner more particularly to a kind of low nitrogen gas combustion apparatus.
Background technology
Combustion system generally forces diffusion mix, is partly-premixed and fully premixed used by traditional gas burner
Three kinds of combustion systems.Three kinds of combustion systems respectively have advantage and disadvantage, and pressure diffusion type mixed effect is poor, and burning velocity is slow, but without tempering
It is dangerous；Other two kinds of combustion systems mix, and burning velocity is fast, but have tempering danger.
Traditional gas burner burner design is generally multitube or the porous pattern of disc type, and combustion gas is usually along burner
Mandrel to, radially or tangentially sprayed, generally use single-stage nozzle or twin-stage nozzle.Traditional gas burner nozzle arrangements
Pattern is single, and combustion gas diffusion hybrid mode is simple, and atmosphere pollution nitrogen oxides (NOx) growing amount in combustion product gases is higher,
Usually less than 120mg/m3。
Utility model content
Technical problem to be solved in the utility model is：For combustion gas diffusion mixing existing for conventional gas burner not
The problem of foot and NOx generation amount are higher, provides a kind of linear low nitrogen gas burner, and combustion gas can efficiently spread mixing, NOx
Growing amount is less than 20mg/m3, to mitigate pollution of the combustion product to air.
The technical solution adopted in the utility model is：A kind of linear low nitrogen gas burner, including combustion air inlet tube, combustion
Gas distributor chamber, single-stage combustion head, thermal insulation layer, burner inner liner, two level ring-type linear nozzle, fuel gas inlet pipeline；Combustion air inlet tube
One end is connected by the air duct mounting flange of end with combustion fan or air passage, other end connection burner inner liner；Combustion gas distributor chamber position
On the outer wall of combustion air inlet tube and burner inner liner, combustion gas distributor chamber respectively with fuel gas inlet pipeline, single-stage combustion head and two level
Looped linear nozzle connects；Two level ring-type linear nozzle includes n spray guns, circumferentially distributed along burner inner liner port；Burner inner liner is located at
Combustion gas distributes on indoor barrel and is laid with thermal insulation layer, wherein, n is positive integer.
The combustion gas distributor chamber is annular cylinder cavity volume, including first member plate, fuel chamber's outer barrel, right end plate；Fuel chamber's outer barrel
And the tubular construction that first member plate mounted on fuel chamber's outer barrel both ends, right end plate are mounted on combustion air inlet tube, burner inner liner forms
On, form annular cylinder cavity volume；Fuel chamber's outer barrel is cylindrical steel cylinder；First member plate is annular cover；Right end plate is ring cover
Plate, at burner inner liner port, for installing two level ring-type linear nozzle；Combustor Method for Installation is provided on fuel chamber's outer barrel
Orchid, combustion gas distributor chamber are connected by combustor mounting flange with furnace body.
The single-stage combustion head includes combustion gas distribution bend pipe, diffusion disc, level-one linear nozzle, three-level nozzle, ignitor
And flame rod；Combustion gas distribution bend pipe is located in burner inner liner, is connected with combustion gas distributor chamber, winding pipe exit section and burner inner liner center
Line is coaxial, outlet section port installation three-level nozzle；Three-level nozzle is the circular cover for being provided with several through holes；Each level-one linear nozzle
It is circumferentially uniformly distributed along combustion gas distribution bend pipe, close to combustion gas distribution winding pipe exit section port, through hole is provided on level-one linear nozzle；
Diffusion disc is close to level-one linear nozzle and on combustion gas distribution bend pipe, and several ventilation holes are provided on diffusion disc；Ignitor
It is fixed on flame rod in combustion gas distribution winding pipe exit section.
Combustion gas distribution bend pipe at outlet section port, along the circumferential direction on uniformly distributed 8~12 circular holes, for pacifying
Fill level-one linear nozzle.
Every level-one linear nozzle be cylindrical shape, in the axial direction on be provided with two rows of fumaroles, per round be in a word
Shape arranges, and the port of export of each level-one linear nozzle is blocked with no blind patch.
On longitudinal cross-section, the angle between two round centers and the line in the cylinder center of circle is each level-one linear nozzle
90°。
Every spray gun axis and burner inner liner center line are in the folder in the range of 5 °~15 ° in the two level ring-type linear nozzle
Angle.
The combustion air inlet tube is coaxial with burner inner liner and diameter is identical.
The two level ring-type linear nozzle injection diameter is 4mm.
The burner inner liner outlet uses contraction mouth pattern, and port is tapered.
Advantage is the utility model compared with prior art：
Combustion gas is divided into multiple thin by the linear nozzle that level-one gas nozzle and second gas burning nozzle use in the utility model
Little airflow sprays at a high speed, and the diffusion strength of the combustion gas of reinforcement makes combustion gas be more fully mixed with combustion air, and fuel gas buring is more equal
It is even, localized hyperthermia is avoided to burn, helps to reduce NOx generation amount；Level-one linear nozzle spray " V " shape jet-flow with it is adjacent
The jet stream that nozzle sprays hit strongly, crushed, and contributes to the diffusion of combustion gas with mixing；Combustion gas is linearly sprayed respectively from level-one
Mouth, two level ring-type linear nozzle and three-level nozzle, which spray, carries out fractional combustion, largely inhibits the growing amount of NOx, realizes
Low NOx combustion；The negative pressuren zone volume smoking gas of two level ring-type linear nozzle root area, realizes flue gas recirculation burning,
Very effective reduction NOx generation amount.Using the utility model, when combustion air is pure air, NOx generation amount is less than 40mg/
m3；When combustion air is using the mixture of air and combustion product gases, NOx generation amount is less than 20mg/m3。
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 (a) is the front schematic view of the utility model；
Fig. 2 (b) is the diagrammatic cross-section of the utility model；
Fig. 3 is the structure diagram of single-stage combustion head；
Fig. 4 is the principle schematic of the utility model；
Fig. 5 (a), Fig. 5 (b) are level-one linear nozzle structure diagram and its ejector principle figure.
Specific embodiment
The utility model is further described below in conjunction with the accompanying drawings：
(a), Fig. 2 (b) are shown as shown in Figure 1, Figure 2, a kind of linear low nitrogen gas burner, including combustion air inlet tube 2, combustion gas
Distributor chamber 3, single-stage combustion are first 4, thermal insulation layer 6, burner inner liner 9, two level ring-type linear nozzle 10, fuel gas inlet pipeline 14；
Combustion gas distributor chamber 3 is connected with fuel gas inlet pipeline 14, single-stage combustion first 4 and two level ring-type linear nozzle 10；Combustion gas
There is combustor mounting flange 5 on outdoor 17 barrel of cylinder, the fuel chamber that entire linear low nitrogen gas burner passes through combustion gas distributor chamber 3
Combustor mounting flange 5 on outer barrel 17 is connected with furnace body；There is air duct mounting flange 1 in 2 one end of combustion air inlet tube, entire linear
Low nitrogen gas burner is connected by the air duct mounting flange 1 on combustion air inlet tube 2 with combustion fan or air passage.
Combustion gas distributor chamber 3 includes first member plate 16, fuel chamber's outer barrel 17, right end plate 18；Combustion air inlet tube 2 connects flame
Cylinder 9 forms tubular construction, and combustion air inlet tube 2, burner inner liner 9 are coaxial and diameter is identical；Combustion gas distributor chamber 3 holds for annular cylinder
The tubular that the first member plate 16 at chamber, fuel chamber's outer barrel 17 and both ends, right end plate 18 are mounted on combustion air inlet tube 2, burner inner liner 9 forms
In structure, annular cylinder cavity volume is formed；Fuel chamber's outer barrel 17 is cylindrical steel cylinder；First member plate 16 is circular ring shape lid outside furnace body
Plate；Right end plate 18 is annular cover plate in stove, several uniformly distributed holes is provided on a certain circumference in right end plate, for installing two level
Looped linear nozzle 10；Between combustion gas distributor chamber 3 and burner inner liner 9, filling with insulation material, that is, thermal insulation layer 6 is thermally insulated.Two
Grade looped linear nozzle 10 is arranged in the right end plate 18 of combustion gas distributor chamber, and right end plate 18 is annularly arranged, every spray gun axis
With burner centerline in the fixed angle in the range of 5 °~15 °.The injection diameter of two level ring-type linear nozzle 10 is left for 4mm
The right side, nozzle flow velocity are 60m/s~80m/s (under maximum combustion load), and nozzle quantity is determined by flow rate calculation.
As shown in Figure 1, Figure 3, single-stage combustion first 4 include combustion gas distribution bend pipe 15, diffusion disc 13, level-one linear nozzle 12,
Three-level nozzle 11, ignitor 7 and flame rod 8.Single-stage combustion first 4 is by combustion gas distribution bend pipe 15, diffusion disc 13, level-one line
Property nozzle 12, three-level nozzle 11 form, and arrange ignitor 7 and flame rod 8.Combustion gas distributes bend pipe 15 and is distributed with combustion gas
Room 3 is connected, and winding pipe exit section is coaxial with burner centerline, and the port of export is sealed with circular cover, and several apertures are provided on cover board,
That is three-level nozzle 11.8~12 circular holes are uniformly being opened on circumferencial direction at combustion gas distribution winding pipe exit end one, for pacifying
Fill level-one linear nozzle 12；Every level-one linear nozzle 12 in the axial direction on be provided with two rows of fumaroles, per round be in linear type
Arrangement, on 12 longitudinal cross-section of level-one linear nozzle, the angle between two round centers and the line in the cylinder center of circle is V-shaped
90 ° of angle arrangements, the port of export of each level-one linear nozzle 12 are blocked with no blind patch.Diffusion disc 13 is close to level-one linear nozzle
12, on combustion gas distribution bend pipe 15, several airing holes are provided on diffusion disc 13.Peace is set on combustion gas distribution bend pipe 15
Seat is filled, fixed ignition electrode 7 and flame rod 8 are used for by clamping plate.6 heat-barrier material of thermal insulation layer is aluminosilicate fiber cotton.
As shown in Fig. 4, Fig. 5 (a), Fig. 5 (b), after combustion gas is from combustion gas entrance pipe 14 into combustion gas distributor chamber 3, it is divided into two
Part：A part of combustion gas for accounting for total tolerance 85% enters after combustion gas distribution bend pipe 15 through sub-distribution again to level-one linear nozzle 12
11 go out with the spray of three-level nozzle, the another part for accounting for total tolerance 15% is then distributed to two level ring-type linear nozzle 10 and sprayed.Into
Combustion gas distributes the combustion gas of bend pipe 15, accounts for a part of combustion gas of total tolerance 80% with 60m/s~80m/s (maximum combustion loads
Under) flow velocity V-shaped ejection out of level-one linear nozzle 12 two rows of linear stomatas, two exhaust streams spray respectively with adjacent nozzle
The air-flow gone out clashes, and combustion gas is crushed rapidly herein, diffusion, then with being perforated through account for from diffusion disc aperture
The First air of total blast volume 10% carries out part mixing, and finally for 30m/s~40m/s, (maximum combustion is born with 13 outer flow velocity of diffusion disc
Under lotus) Secondary Air carry out strong diffusion, mixing again, catch fire through diffusion, mixed flammable mixture in burner inner liner 9 combustion
It burns.The combustion gas sprayed from once linear nozzle 12 is fully burnt in burner inner liner 9 under the conditions of peroxide, meanwhile, from three-level nozzle 11
The combustion gas of ejection also assists in burning, forms a small amount of reducing atmosphere, generates hydrocarbon group, with the NOx of combustion product into
Row partial reduction is reacted, and NOx is reduced to N2。
Combustion flame in burner inner liner 9 jets out flames after cylinder, then is mixed with the combustion gas of two level ring-type linear nozzle 10
Burning.In this region, local is reducing atmosphere, generates a large amount of hydrocarbon groups, with the generation of burner inner liner combustion zone
NOx carries out reduction reaction, and NOx is reduced to N2。
It exports in burner inner liner 9, since the high speed of combustion flame sprays, is generated in 10 root area of two level ring-type linear nozzle
Part low-temperature flue gas volume in burner hearth is drawn to this, participates in burning again, on the one hand reduce flame temperature peak by one negative pressure region
On the other hand value reduces the oxygen concentration in ignition mixture, so as to effectively reduce the growing amount of NOx.
The utility model unspecified part belongs to common sense well known to those skilled in the art.
Claims (10)
1. a kind of linear low nitrogen gas burner, which is characterized in that including combustion air inlet tube (2), combustion gas distributor chamber (3), one
Grade combustion head (4), thermal insulation layer (6), burner inner liner (9), two level ring-type linear nozzle (10), fuel gas inlet pipeline (14)；Combustion air
Inlet tube (2) one end is connected by the air duct mounting flange (1) of end with combustion fan or air passage, other end connection burner inner liner
(9)；Combustion gas distributor chamber (3) is located on the outer wall of combustion air inlet tube (2) and burner inner liner (9), combustion gas distributor chamber (3) respectively with combustion
Gas entrance pipe (14), single-stage combustion head (4) are connected with two level ring-type linear nozzle (10)；Two level ring-type linear nozzle (10) wraps
N spray guns are included, it is circumferentially distributed along burner inner liner (9) port；Burner inner liner (9) be located on the barrel in combustion gas distributor chamber (3) be laid with every
Thermosphere (6), wherein, n is positive integer.
2. a kind of linear low nitrogen gas burner according to claim 1, it is characterised in that：The combustion gas distributor chamber (3)
For annular cylinder cavity volume, including first member plate (16), fuel chamber's outer barrel (17), right end plate (18)；Fuel chamber's outer barrel (17) and installation
First member plate (16), right end plate (18) at fuel chamber's outer barrel (17) both ends are mounted on combustion air inlet tube (2), burner inner liner (9) group
Into tubular construction on, formed annular cylinder cavity volume；Fuel chamber's outer barrel (17) is cylindrical steel cylinder；First member plate (16) is circular ring shape
Cover board；Right end plate (18) is annular cover plate, at burner inner liner (9) port, for installing two level ring-type linear nozzle (10)；Combustion
Combustor mounting flange (5) is provided on gas chamber outer barrel (17), combustion gas distributor chamber (3) passes through combustor mounting flange (5) and stove
Body is connected.
3. a kind of linear low nitrogen gas burner according to claim 1 or 2, it is characterised in that：The single-stage combustion head
(4) combustion gas distribution bend pipe (15), diffusion disc (13), level-one linear nozzle (12), three-level nozzle (11), ignitor (7) are included
With flame rod (8)；Combustion gas distribution bend pipe (15) is located in burner inner liner (9), is connected with combustion gas distributor chamber (3), winding pipe exit
Section is coaxial with burner inner liner (9) center line, outlet section port installation three-level nozzle (11)；Three-level nozzle (11) is to be provided with several through holes
Circular cover；Each level-one linear nozzle (12) is circumferentially uniformly distributed along combustion gas distribution bend pipe (15), and bend pipe is distributed close to combustion gas
(15) outlet section port, level-one linear nozzle are provided with through hole on (12)；Diffusion disc (13) is close to level-one linear nozzle (12) and is pacified
On combustion gas distribution bend pipe (15), diffusion disc is provided with several ventilation holes on (13)；Ignitor (7) and flame rod (8)
It is fixed on combustion gas distribution bend pipe (15) outlet section.
4. a kind of linear low nitrogen gas burner according to claim 3, it is characterised in that：The combustion gas distributes bend pipe
(15) at the outlet section port, along the circumferential direction on uniformly distributed 8~12 circular holes, for installing level-one linear nozzle (12).
5. a kind of linear low nitrogen gas burner according to claim 4, it is characterised in that：The level-one linear nozzle
(12) for cylindrical shape, in the axial direction on be provided with two rows of fumaroles, per round in rods arranged in horizontal line, each level-one linear nozzle (12)
The port of export blocked with no blind patch.
6. a kind of linear low nitrogen gas burner according to claim 5, it is characterised in that：Each level-one linear nozzle
(12) on longitudinal cross-section, the angle between two round centers and the line in the cylinder center of circle is 90 °.
7. a kind of linear low nitrogen gas burner according to claim 1 or 2, it is characterised in that：The two level ringed line
Property nozzle (10) in every spray gun axis with burner inner liner (9) center line in the angle in the range of 5 °~15 °.
8. a kind of linear low nitrogen gas burner according to claim 1 or 2, it is characterised in that：The combustion air entrance
Pipe (2) is coaxial with burner inner liner (9) and diameter is identical.
9. a kind of linear low nitrogen gas burner according to claim 7, it is characterised in that：The two level looped linear spray
Mouth (10) injection diameter is 4mm.
10. a kind of linear low nitrogen gas burner according to claim 1, it is characterised in that：Burner inner liner (9) outlet
Using contraction mouth pattern, port is tapered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721206348.1U CN207378815U (en) | 2017-09-20 | 2017-09-20 | A kind of linear low nitrogen gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721206348.1U CN207378815U (en) | 2017-09-20 | 2017-09-20 | A kind of linear low nitrogen gas burner |
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| Publication Number | Publication Date |
|---|---|
| CN207378815U true CN207378815U (en) | 2018-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721206348.1U Active CN207378815U (en) | 2017-09-20 | 2017-09-20 | A kind of linear low nitrogen gas burner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575864A (en) * | 2017-09-20 | 2018-01-12 | 上海岱鼎工业设备有限公司 | A kind of linear low nitrogen gas burner |
| CN109442403A (en) * | 2018-11-21 | 2019-03-08 | 中国科学院工程热物理研究所 | Bispin burner and its method for controlling combustion |
| CN111059536A (en) * | 2019-12-23 | 2020-04-24 | 浙江惠厨节能科技有限公司 | Low-noise furnace end made by necking steel pipes and arranging thin pipes on inner wall |
| CN115807947A (en) * | 2021-09-15 | 2023-03-17 | 中国船舶重工集团公司第七0三研究所 | Axial premixing low-emission flame tube |
-
2017
- 2017-09-20 CN CN201721206348.1U patent/CN207378815U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575864A (en) * | 2017-09-20 | 2018-01-12 | 上海岱鼎工业设备有限公司 | A kind of linear low nitrogen gas burner |
| CN107575864B (en) * | 2017-09-20 | 2024-06-04 | 上海岱鼎工业设备有限公司 | Linear low-nitrogen gas combustion head |
| CN109442403A (en) * | 2018-11-21 | 2019-03-08 | 中国科学院工程热物理研究所 | Bispin burner and its method for controlling combustion |
| CN109442403B (en) * | 2018-11-21 | 2023-12-05 | 中国科学院工程热物理研究所 | Double-swirl burner and combustion control method thereof |
| CN111059536A (en) * | 2019-12-23 | 2020-04-24 | 浙江惠厨节能科技有限公司 | Low-noise furnace end made by necking steel pipes and arranging thin pipes on inner wall |
| CN115807947A (en) * | 2021-09-15 | 2023-03-17 | 中国船舶重工集团公司第七0三研究所 | Axial premixing low-emission flame tube |
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