CN208418703U - A kind of air/lean gas replaceable type low NOx cyclone burner - Google Patents
A kind of air/lean gas replaceable type low NOx cyclone burner Download PDFInfo
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- CN208418703U CN208418703U CN201820766078.8U CN201820766078U CN208418703U CN 208418703 U CN208418703 U CN 208418703U CN 201820766078 U CN201820766078 U CN 201820766078U CN 208418703 U CN208418703 U CN 208418703U
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Abstract
The utility model discloses a kind of air/lean gas replaceable type low NOx cyclone burners, including precombustion chamber, center lean gas air duct, First air air duct, air/lean gas replaceable type air duct, inner second air air duct and outer second air air duct；Center lean gas air duct, First air air duct, air/lean gas replaceable type air duct and inner second air air duct are sequentially distributed from inside to outside；Air/lean gas replaceable type air duct entrance is divided into air channel and lean gas air duct, wherein is provided with air dampers baffle in air channel, lean gas air channel barrier is provided in lean gas air duct；It is disposed on the inner wall in First air air duct along the direction of air-flow flowing and flows item group and pulverized coal concentrator, several axially adjustable swirl vanes are provided in inner second air air duct, the burner can flexible and effective depth controls NOx discharge in real time according to coal varitation characteristic.
Description
Technical field
The utility model belongs to power station, Industrial Boiler pulverized coal combustion and field of environmental technology, be related to a kind of air/
Lean gas replaceable type low NOx cyclone burner.
Background technique
In China, coal as a kind of dominance energy resources in it is long-term in will not change.The coal-burned industrial boiler energy
Consumption and disposal of pollutants occupy national industrial trade second, are only second to station boiler, to caused by national some importance city
Disposal of pollutants has been over station boiler.
Coal-burned industrial boiler NOx emission standard is increasingly stringent.According to " emission standard of air pollutants for boilers " GB13271-
2014, newly-built industry coal-boiler NOx emission must not be higher than 300mg/m3, emphasis region is 200mg/m3。
Industrial coal powder boiler burner design optimization is current industrial coal dust as the method for reducing NOx most direct economy
The hot spot of boiler coal-ash burning and NOx abatement research.Existing coal burner, such as " one kind is for industry for utility model patent
The vortex burner for using flue gas recirculation of kiln " (Chinese patent ZL201010213627.7, authorized announcement date for
September in 2011 14 days, Authorization Notice No. 101876433A, call " file one " in the following text) consider that coal characteristic is provided with a variety of implementations
The burner of mode, but structure is complicated, and be difficult to realize in a kind of burner operational process according to the real-time of coal quality dramatic performance
Flexible modulation；(Chinese patent ZL 201310569461.6, authorized announcement date are utility model patent " vortex burner "
March 12, Authorization Notice No. 103629663A in 2014, call " file two " in the following text) use choker bar by breeze airflow, Secondary Air
If air-flow and tertiary air air-flow are divided into carried interest ejection, and air stream and breeze airflow are along the circumferential direction substantially staggered,
Postpone the mixing of air and coal dust, reduces NOx and generate and discharge；A kind of utility model patent " coal burner " (Chinese patent
ZL 201210152329.0, authorized announcement date are October 3, Authorization Notice No. 100705823A in 2012, call " file in the following text
Three ") it will light and classification of burning carries out, and realize and stablize burning.From the point of view of existing research achievement, " file one ", " file two ",
The coal burner that " file three " proposes does not use the advanced low NOx combusting technologies such as precombustion chamber burning or lean gas, Bu Nenggen
According to coal varitation characteristic, flexible and effective depth controls NOx discharge in real time, it is difficult to meet increasingly stringent coal-burned industrial boiler
NOx emission requirement.
Utility model content
It is replaceable to provide a kind of air/lean gas for the shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts
Formula low NOx cyclone burner, the burner can flexible and effective depth controls NOx emission in real time according to coal varitation characteristic
Amount.
In order to achieve the above objectives, air described in the utility model/lean gas replaceable type low NOx cyclone burner includes pre-
Fire room, center lean gas air duct, First air air duct, air/lean gas replaceable type air duct, inner second air air duct and outer second air wind
Road；
Center lean gas air duct, First air air duct, air/lean gas replaceable type air duct and inner second air air duct from inside to outside according to
Secondary distribution, center lean gas air duct, First air air duct, air/lean gas replaceable type air duct and inner second air air duct are and precombustion chamber
It is connected, outer second air air duct is wrapped in outside precombustion chamber, and the outlet in outer second air air duct is connected with the entrance of burner hearth, precombustion chamber
Outlet in the burner hearth wall surface；
Air/lean gas replaceable type air duct entrance is divided into air channel and lean gas air duct, wherein sets in air channel
It is equipped with air dampers baffle, lean gas air channel barrier is provided in lean gas air duct；
It is disposed on the inner wall in First air air duct along the direction of air-flow flowing and flows item group and pulverized coal concentrator, interior two
Several axially adjustable swirl vanes are provided in secondary wind air duct.
Center is provided with lean gas damper in lean gas air duct.
It further include the manual adjustment rod for controlling each axially adjustable swirl vane eddy flow angle.
The entrance of the entrance in First air air duct, the entrance in inner second air air duct and outer second air air duct is respectively set
First air damper, inner second air damper and outer second air damper.
Each axially adjustable swirl vane is uniformly distributed circumferentially.
Each stream item in item group is flowed to be uniformly distributed.
Air-flow in the lean gas air duct of center accounts for the 0~7% of total blast volume, and the air-flow in air/lean gas replaceable type air duct accounts for
The total amount of lean gas is less than or equal to total blast volume in total blast volume 0~20%, center lean gas air duct and air/lean gas replaceable type air duct
20%, the air-flow in First air air duct accounts for the 15%~20% of total blast volume, and the air-flow in inner second air air duct accounts for the 30 of total blast volume
~40%；Air quantity in outer second air air duct accounts for the 40%~55% of air demand.
The utility model has the following beneficial effects:
Air described in the utility model/lean gas replaceable type low NOx cyclone burner is when specific operation, using center
Lean gas air-flow, First air air-flow, air/lean gas replaceable type air-flow, the adjustable inner second air air-flow of swirl strength and outer two
Secondary general mood stream phase configuration is being guaranteed by the proportion of lean gas air-flow and air draught in control air/lean gas replaceable type air-flow
Needed for ignition while oxygen, increase the air quantity of lean gas air-flow, strengthen reducing atmosphere, reduces NOx emission；It controls simultaneously
The ratio of inner second air and outer second air guarantees strong reducing property atmosphere in precombustion chamber, extends breeze airflow in reducing atmosphere
Residence time, further decrease the discharge of NOx；Meanwhile center lean gas air-flow can be formed in breeze airflow central area it is low
Oxygen environment strengthens reducing atmosphere and NOx abatement.In addition, pulverized coal concentrator is arranged in First air air duct, breeze airflow edge is caused
Radial air-coal separating promotes kindling and NOx abatement；And several stream items have been uniformly arranged in the circumferential direction in First air air duct, it protects
Coal powder density is uniformly distributed in card First air breeze airflow, optimizes the uniform emission reduction of NOx.In addition, strong by adjustable eddy flow
The inner second air of degree is matched with precombustion chamber, inhales high temperature reflux flue gas and radiation by volume, is conducive to improve difficult kindling coal
Case of fire.In addition, can be flexibly passed through using high-temperature flue gas recycling, low-temperature flue gas recycling and exhaust gas according to coal characteristic
Air/lean gas replaceable type air duct while reducing NOx, guarantees kindling and burning, realizes clever in real time according to coal varitation characteristic
Living and effective depth controls NOx discharge.
Further, it by adjusting the aperture of air dampers baffle, while realizing that lean gas burning reduces NOx emission, protects
It demonstrate,proves burning initial stage and stablizes required oxygen amount of burning.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the sectional view in the direction A-A in Fig. 1.
Wherein, 1 it is center lean gas air duct, 2 be First air air duct, 3 be air/lean gas replaceable type air duct, 4 is to adjust manually
Pole, 5 be axially adjustable swirl vane, 6 be inner second air air duct, 7 be flow item, 8 be pulverized coal concentrator, 9 be outer secondary
Wind air duct, 10 be precombustion chamber, 11 be lean gas damper, 12 be First air damper, 13 be air channel, 14 be air wind
Door guard plate, 15 be lean gas air duct, 16 be lean gas air channel barrier, 17 be inner second air damper, 18 be outer second air damper
Plate.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
Referring to Figure 1 and Figure 2, air described in the utility model/lean gas replaceable type low NOx cyclone burner includes pre-burning
Room 10, center lean gas air duct 1, First air air duct 2, air/lean gas replaceable type air duct 3, inner second air air duct 6 and outer second air
Air duct 9；Center lean gas air duct 1, First air air duct 2, air/lean gas replaceable type air duct 3 and inner second air air duct 6 are from inside to outside
Be sequentially distributed, center lean gas air duct 1, First air air duct 2, air/lean gas replaceable type air duct 3 and inner second air air duct 6 with
Precombustion chamber 10 is connected, and outer second air air duct 9 is wrapped in outside precombustion chamber 10, the outlet in outer second air air duct 9 and the entrance of burner hearth
It is connected, the outlet of precombustion chamber 10 is in burner hearth wall surface；Air/lean gas replaceable type air duct 3 entrance is divided into air wind
Road 13 and lean gas air duct 15, wherein be provided with air dampers baffle 14 in air channel 13, be provided with lean gas in lean gas air duct 15
Air channel barrier 16；It is disposed on the inner wall in First air air duct 2 along the direction of air-flow flowing and flows item group and pulverized coal concentrator
8, several axially adjustable swirl vanes 5 are provided in inner second air air duct 6.Wherein, each axially adjustable swirl vane 5 is along week
To being uniformly distributed；Each stream item 7 in item group is flowed to be uniformly distributed；The utility model further includes for controlling each axially adjustable rotation
Flow the manual adjustment rod 4 of 5 eddy flow angle of blade.
Lean gas damper 11 is provided in center lean gas air duct 1；The entrance in First air air duct 2, inner second air air duct 6
Entrance and outer second air air duct 9 entrance be respectively set First air damper 12, inner second air damper 17 and
Outer second air damper 18.
Air-flow in center lean gas air duct 1 accounts for the 0~7% of total blast volume, the air-flow in air/lean gas replaceable type air duct 3
Total blast volume 0~20% is accounted for, the total amount of lean gas is less than or equal to total wind in center lean gas air duct 1 and air/lean gas replaceable type air duct 3
The 20% of amount, the air-flow in First air air duct 2 account for the 15%~20% of total blast volume, and the air-flow in inner second air air duct 6 accounts for total wind
The 30~40% of amount；Air quantity in outer second air air duct 9 accounts for the 40%~55% of air demand.
The specific operation process of the utility model are as follows:
When the difficult coal caught fire and NOx generation amount is high of burn meager coal and anthracite etc., by opening for lean gas air channel barrier 16
Degree is adjusted to maximum, using high-temperature flue gas or high-temp waste gas as lean gas, provides high-temperature reductibility atmosphere by lean gas, postpones coal
Powder air-flow mixes with air, and then reduces NOx emission, and provide heat source for coal powder ignition；Meanwhile it being adjusted by manual adjustment rod 4
The angle of axially adjustable swirl vane 5 is saved, swirl strength is increased, strengthens the volume pipette of high-temperature flue gas, promotes coal dust timely
Fire.At this point, 14 aperture of air dampers baffle minimizes, strengthen reducing atmosphere.
When the coal quality that bituminous coal etc. is easily caught fire and NOx generation amount is low, the aperture of lean gas damper 11 is maximized,
Using low-temperature flue gas or low temperature waste gas as lean gas；Meanwhile axially adjustable swirl vane 5 is adjusted by manual adjustment rod 4
Angle, moderate reduction swirl strength；The two, which combines, provides low temperature strong reducing property atmosphere, reduces NOx emission.At this point, air
The aperture of damper 14 minimizes, and extends residence time of the breeze airflow in low-temperature reinforcement reducing atmosphere, strengthens NOx
Reduction and emission reduction.
The above content is only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, any changes made on the basis of the technical scheme each falls within this reality
Within protection scope with novel claims.
Claims (7)
1. a kind of air/lean gas replaceable type low NOx cyclone burner, which is characterized in that including precombustion chamber (10), center lean gas
Air duct (1), First air air duct (2), air/lean gas replaceable type air duct (3), inner second air air duct (6) and outer second air air duct
(9)；
Center lean gas air duct (1), First air air duct (2), air/lean gas replaceable type air duct (3) and inner second air air duct (6) by
It is interior to being sequentially distributed outside, center lean gas air duct (1), First air air duct (2), air/lean gas replaceable type air duct (3) and interior secondary
Wind air duct (6) is connected with precombustion chamber (10), and outer second air air duct (9) are wrapped in precombustion chamber (10) outside, outer second air air duct
(9) outlet is connected with the entrance of burner hearth, and the outlet of precombustion chamber (10) is in burner hearth wall surface；
Air/lean gas replaceable type air duct (3) entrance is divided into air channel (13) and lean gas air duct (15), wherein air
It is provided with air dampers baffle (14) in air duct (13), is provided with lean gas air channel barrier (16) in lean gas air duct (15)；
It is disposed on the inner wall in First air air duct (2) along the direction of air-flow flowing and flows item group and pulverized coal concentrator (8), it is interior
Several axially adjustable swirl vanes (5) are provided in secondary air passage (6).
2. air according to claim 1/lean gas replaceable type low NOx cyclone burner, which is characterized in that center lean gas
Lean gas damper (11) are provided in air duct (1).
3. air according to claim 1/lean gas replaceable type low NOx cyclone burner, which is characterized in that further include using
In the manual adjustment rod (4) for controlling each axially adjustable swirl vane (5) eddy flow angle.
4. air according to claim 1/lean gas replaceable type low NOx cyclone burner, which is characterized in that First air wind
First air is respectively set in the entrance of the entrance in road (2), the entrance of inner second air air duct (6) and outer second air air duct (9)
Damper (12), inner second air damper (17) and outer second air damper (18).
5. air according to claim 1/lean gas replaceable type low NOx cyclone burner, which is characterized in that each axial direction can
Swirl vane (5) are adjusted to be uniformly distributed circumferentially.
6. air according to claim 1/lean gas replaceable type low NOx cyclone burner, which is characterized in that stream item group
Interior each stream item (7) is uniformly distributed.
7. air according to claim 1/lean gas replaceable type low NOx cyclone burner, which is characterized in that center lean gas
Air-flow in air duct (1) accounts for the 0~7% of total blast volume, the air-flow in air/lean gas replaceable type air duct (3) account for total blast volume 0~
20%, center lean gas air duct (1) and air/lean gas replaceable type air duct (3) interior lean gas total amount are less than or equal to total blast volume
20%, the air-flow in First air air duct (2) accounts for the 15%~20% of total blast volume, and the air-flow in inner second air air duct (6) accounts for total wind
The 30~40% of amount；Air quantity in outer second air air duct (9) accounts for the 40%~55% of air demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820766078.8U CN208418703U (en) | 2018-05-22 | 2018-05-22 | A kind of air/lean gas replaceable type low NOx cyclone burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820766078.8U CN208418703U (en) | 2018-05-22 | 2018-05-22 | A kind of air/lean gas replaceable type low NOx cyclone burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208418703U true CN208418703U (en) | 2019-01-22 |
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ID=65114943
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820766078.8U Active CN208418703U (en) | 2018-05-22 | 2018-05-22 | A kind of air/lean gas replaceable type low NOx cyclone burner |
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| CN (1) | CN208418703U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443868A (en) * | 2018-05-22 | 2018-08-24 | 西安交通大学 | A kind of air/low NO of lean gas replaceable typexTurbulent burner |
-
2018
- 2018-05-22 CN CN201820766078.8U patent/CN208418703U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443868A (en) * | 2018-05-22 | 2018-08-24 | 西安交通大学 | A kind of air/low NO of lean gas replaceable typexTurbulent burner |
| CN108443868B (en) * | 2018-05-22 | 2024-04-16 | 西安交通大学 | Air/lean gas replaceable low NO x Swirl burner |
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