CN209180981U - Secondary air box, burner and boiler - Google Patents
Secondary air box, burner and boiler Download PDFInfo
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- CN209180981U CN209180981U CN201821886696.2U CN201821886696U CN209180981U CN 209180981 U CN209180981 U CN 209180981U CN 201821886696 U CN201821886696 U CN 201821886696U CN 209180981 U CN209180981 U CN 209180981U
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- cabinet
- damper
- secondary air
- air box
- monitor
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Abstract
The utility model relates to thermal power generating technology fields, more particularly, to a kind of secondary air box, burner and boiler.Secondary air box includes cabinet, the first demarcation plate, mounting rack, damper and CO monitor；First demarcation plate is arranged in cabinet, the air intake vent of cabinet can be divided into two parts；One end of first demarcation plate is fixed on mounting rack, and the other end and damper are rotatablely connected；CO monitor is arranged in cabinet, and the display of CO monitor is outside the enclosure.Burner includes the secondary air box of any of the above-described.Boiler includes above-mentioned burner.Secondary air box, burner and boiler provided by the utility model, pass through the setting of damper, so that the burnout degree amount in secondary air box is improved, and improve burnout degree rigidity, CO monitor by being arranged in out of stock entrance again, the production quantity for monitoring CO, to guarantee that oxygen amount in reasonable range, is both effectively controlled NOxGeneration, and saved and sent, the power consumption of air-introduced machine.
Description
Technical field
The utility model relates to thermal power generating technology fields, more particularly, to a kind of secondary air box, burner and boiler.
Background technique
For NOx formation mechanism there are three aspect: heating power type, fuel type, Quick-type.
Nitrogen oxides: NO, NO2, N2O、N2O3, N2O4, N2O5Deng, but the nitrogen oxides generated in combustion, Ji Huquan
It is NO and NO2.Both nitrogen oxides are usually called NOx。
Thermal NOxIt is nitrogen in air (1000 DEG C -1400 DEG C or more) oxidations and the NO that generates at high temperaturex。
Quick-type NOxThe NO that ionic hydrocarbon group such as CH reaction in nitrogen and fuel when being burning in air generatesx。
Fuel type NOxIt is that the nitrogen compound contained in fuel thermally decomposes in combustion and then aoxidizes and generate
NOx。
Low nitrogen burning transformation is most important solution in current industry, and cardinal principle is by reducing main burning area
The excess air coefficient in domain improves burning situation, reduces fire box temperature, while increasing the ratio of the separation total secondary air flow of burnout degree Zhan
Example inhibits heating power type and fuel type NOxGeneration.Related genco is seeked advice from, same type separate unit boiler low nitrogen burning is transformed
About between ten thousand yuan of 600-1000, transformation rear hearth exports NO for investmentxReduce by 50-100mg/Nm3, but also bring simultaneously low negative
Main the temperature of reheated steam deviating on the low side, load -response-speed are limited when lotus (being less than 8MW/min), and raising of flying dust boiler slag carbon content etc. influences pot
The adverse effect of the efficiency of furnace.
Utility model content
The purpose of this utility model is to provide a kind of secondary air box, burner and boilers, to solve to deposit in the prior art
The technical issues of.
Secondary air box provided by the utility model, including cabinet, damper and CO monitor；
The damper is rotatably arranged in the cabinet, for changing the case by the rotation of the damper
The intake of the air intake vent of body；
The CO monitor is arranged in the cabinet, and the display of the CO monitor is outside the cabinet.
Further, drive shaft is connected on the damper；
One end of the drive shaft is fixedly connected with the damper, and the other end is arranged outside the cabinet.
Further, the other end of the drive shaft is provided with handle.
Further, the other end of the drive shaft is provided with rotation positioning device, can be to the position of the drive shaft
It is positioned.
Further, the driving positioning device includes locating rod, positioning pin and positioning plate；
One end of the locating rod is fixedly connected with one end that the drive shaft is arranged in outside the cabinet；
One end of the positioning pin is fixed at the other end of the locating rod；
The positioning plate is fixed on the outer wall of the cabinet, and multiple location holes are provided on the positioning plate；
The other end of the positioning pin is inserted in one of them described positioning hole, for preventing the damper from rotating.
Further, secondary air box further includes controller and driving motor；
The driving motor is fixed on the outer wall of the cabinet, and is arranged outside the cabinet with the drive shaft
One end be fixedly connected, be able to drive damper rotation；
The controller is fixed on the cabinet, and respectively with the driving motor and the CO monitor signal
Connection, can control the rotational angle of the damper according to the data that the CO monitor monitors.
Further, the air distribution mode of the air intake vent is inverted triangle air distribution.
Further, the air intake vent is provided with demarcation plate, for the air intake vent to be divided into two；
One end of the demarcation plate is arranged in the damper, for adjusting the air inlet of any side of the demarcation plate
Amount.
The utility model additionally provides a kind of burner comprising secondary air box described in any of the above embodiments.
The utility model additionally provides a kind of boiler comprising above-mentioned burner.
Secondary air box, burner and boiler provided by the utility model, by the setting of damper, so that secondary air box
Interior burnout degree amount is improved, and improves burnout degree rigidity, then the CO monitor by being arranged in out of stock entrance, monitoring
The production quantity of CO, to guarantee that oxygen amount in reasonable range, is both effectively controlled NOxGeneration, and saved and sent, air inducing
The power consumption of machine.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of secondary air box provided by the embodiment of the utility model；
Fig. 2 is another structural schematic diagram of secondary air box provided by the embodiment of the utility model；
Fig. 3 is the side view of secondary air box provided by the embodiment of the utility model；
Fig. 4 is the structural schematic diagram of the driving positioning device of secondary air box provided by the embodiment of the utility model；
Fig. 5 is the structural schematic diagram of the positioning plate of secondary air box provided by the embodiment of the utility model.
Appended drawing reference:
1: cabinet；2: damper；3: drive shaft；4: demarcation plate；5: locating rod；6: positioning pin；7: positioning plate；8: positioning
Hole.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply phase
To importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
As shown in attached drawing 1- Fig. 5, the utility model provides a kind of secondary air box, including cabinet 1, damper 2 and CO
Monitor；
The damper 2 is rotatably arranged in the cabinet 1, for changing institute by the rotation of the damper 2
State the intake of the air intake vent of cabinet 1；
The CO monitor is arranged in the cabinet 1, and the display of the CO monitor is outside the cabinet 1.
When boiler hypoxemia is run, economize on electricity reduces NOxGeneration be it will be apparent that but oxygen content control how much can properly pass through
The content of measurement CO is intuitively reacted.
It in the present embodiment, can be according to the monitoring data of CO monitor, under different load after CO monitor being installed
Air quantity, oxygen amount curve are modified, so that oxygen content control value about reduces 0.5% under identical operating condition.
In the present embodiment, it is provided with damper 2 in cabinet 1, by the rotation of damper 2, controls Secondary Air
Ventilation quantity in case so that ventilation quantity and coal dust reach optimal proportion, and then improves the efficiency of combustion of coal dust, and then reduces NOx
Generation.
In the present embodiment, in order to further decrease oxynitrides in boiler, following measure can also be taken, such as:
1. when using the higher bituminous coal of volatile matter, fuel type NOxContent is more, Quick-type NOxSeldom.Fuel type NOxIt is
Oxygen and nitrogen content of coal element thermal decomposition product in air, which react, generates NOx, nitrogen is not completely reformed into NO in fuelx, it exists
One conversion ratio reduces this conversion ratio, controls NOxTotal emission volumn can take the excess air coefficient for reducing and burning to work as in operation
Middle control boiler oxygen amount is increased in 2.0%-2.5% control boiler oxynitrides.
2. control fuel is mixed with the early period of air, by the way that coal pulverizer outlet primary air velocity is reduced, control coal dust enters
Burner hearth ignition time, control coal dust enter burner hearth ignition time, reinforce adjustment of the air distribution by primary and secondary air.
3. controlling coal pulverizer fineness of pulverized coal by adjusting coal pulverizer outlet damper, the thickness of fineness of pulverized coal is found out in furnace
Burning generates the best fineness of pulverized coal of oxynitrides, to control boiler oxynitrides.
4. improving local burnup's concentration into furnace, prevent coal dust firing insufficient, flame kernel moves up, and causes furnace outlet
Smoke temperature is high, and boiler oxynitrides is caused to increase.
Preferred embodiment is to be connected with drive shaft 3 on the damper 2；
One end of the drive shaft 3 is fixedly connected with the damper 2, and the other end is arranged outside the cabinet 1.
The rotation of damper 2 is driven by drive shaft 3, and then is realized and adjusted to the angle of damper 2.
Preferred embodiment is that the other end of the drive shaft 3 is provided with handle.
In the present embodiment, the driving method of drive shaft 3 is manual actuation, i.e., drives 3 turns of drive shaft by handle
It is dynamic, according to the monitoring result of CO monitor, artificially the air quantity of Secondary Air is adjusted, to reach the mesh for reducing oxynitrides
's.
In the present embodiment, it there are many kinds of the set-up modes of handle, can be staight shank, be also possible to annulus handle etc.,
That is, as long as it can drive drive shaft 3 to be rotated by handle.
Preferred embodiment is that the other end of the drive shaft 3 is provided with rotation positioning device, can be to the driving
The position of axis 3 is positioned.
In the present embodiment, it in order to enable damper 2 is able to carry out fixation after being rotated in place, is set in drive shaft 3
Rotation positioning device has been set, drive shaft 3 can have been positioned, and then has realized the positioning to damper 2.
Preferred embodiment is that the driving positioning device includes locating rod 5, positioning pin 6 and positioning plate 7；
One end of the locating rod 5 is fixedly connected with one end that the drive shaft 3 is arranged in outside the cabinet 1；
One end of the positioning pin 6 is fixed at the other end of the locating rod 5；
The positioning plate 7 is fixed on the outer wall of the cabinet 1, and multiple positioning are provided on the positioning plate 7
Hole 8；
The other end of the positioning pin 6 is inserted in one of them described location hole 8, for preventing 2 turns of the damper
It is dynamic.
Positioning plate 7 is fixed on the outer wall of cabinet 1, the one of locating rod 5 by modes such as welding, riveting or bolt fixations
End is fixedly connected with the end of drive shaft 3, and the other end is provided with pin hole, and positioning pin 6 passes through pin hole and is inserted in the positioning on positioning plate 7
In hole 8, prevent locating rod 5, so that drive shaft 3 can not be rotated, realizes drive shaft from rotating around drive shaft 3
The positioning of damper 2 is furthermore achieved in 3 positioning.
In the present embodiment, locating rod 5 can also be is substituted using handle, i.e., pin hole is directly arranged on handle, positioning
The pin hole that pin 6 passes through on handle is inserted in the location hole 8 on positioning plate 7.
In the present embodiment, positioning plate 7 is annular, is fixedly installed centered on drive shaft 3, location hole 8 is with positioning plate 7
Center is uniformly arranged for axle center.The setting of location hole 8 can be single layer of rings, be also possible to multilayer loop, when location hole 8 is multilayer loop
When setting, 8 quantity of location hole of every layer of ring is not identical, so that it can position different angles, improves
The precision of positioning.
Preferred embodiment is that secondary air box further includes controller and driving motor；
The driving motor is fixed on the outer wall of the cabinet 1, and is arranged with the drive shaft 3 in the cabinet
One end outside 1 is fixedly connected, and is able to drive the damper 2 and is rotated；
The controller is fixed on the cabinet 1, and is believed respectively with the driving motor and the CO monitor
Number connection, the rotational angle of the damper 2 can be controlled according to the data that the CO monitor monitors.
In the present embodiment, drive shaft 3 is driven by driving motor, by controller to the state of driving motor into
Row control.
The data of CO monitor are conveyed to controller, and after controller is calculated according to data, instruction is transferred to driving
Motor, driving motor drive drive shaft 3 to rotate according to instruction, and then realize and be adjusted to the angle of damper 2.
Whole process realizes the adjust automatically to damper 2, and then realizes to NOxThe automatic control of production rate.
Preferred embodiment is that the air distribution mode of the air intake vent is inverted triangle air distribution.
Inverted triangle air distribution mode is that top air port is wider, and lower part air port is relatively narrow or the multiple air inlets in top, lower part into
Inlet number is less than top air inlet quantity, realizes that the wind-force of secondary air box internal upper part is larger, lower part wind-force is smaller, reduces pot
Flame height in furnace, increases burning time, thereby reduces NOxProduction quantity.
The air distribution mode that furnace flame is used to inverted triangle is reduced the air capacity that burner hearth is fed from main burner, quite
In the 80% of theoretical air requirement, fuel is made first to burn under the conditions of the fuel-rich combustion of anoxic, reduces the burning speed in combustion zone
Degree and temperature levels, delayed combustion process, and reduce generate NO in reducing atmospherexReactivity, it is suppressed that NOx?
This aflame production quantity, second stage burn the stage, in order to complete whole combustion processes, remaining sky needed for completely burned
Gas is then sent into burner hearth by being arranged in the overfire air port above main burner, mixes with flue gas caused by main burning, completes
Whole combustion processes.
Preferred embodiment is that the air intake vent is provided with demarcation plate 4, for the air intake vent to be divided into two；
One end of the demarcation plate 4 is arranged in the damper 2, for adjust any side of the demarcation plate 4 into
Air quantity.
By demarcation plate 4, air intake vent is divided into two parts, 4 inner end of demarcation plate is mounted in damper 2, so that wind
The air intake vent on 4 one side of demarcation plate can be adjusted in door guard plate 2, another side all-pass, so that the air quantity tune of damper 2
Adjusting range is half air intake vent to entire air intake vent, ensure that secondary air box can have air inlet always.
The utility model additionally provides a kind of burner comprising secondary air box described in any of the above embodiments.
The utility model additionally provides a kind of boiler comprising above-mentioned burner.
Secondary air box, burner and boiler provided by the utility model, by the setting of damper 2, so that Secondary Air
Burnout degree amount in case is improved, and improves burnout degree rigidity, then the CO monitor by being arranged in out of stock entrance, prison
The production quantity for surveying CO, to guarantee that oxygen amount in reasonable range, is not only effectively controlled the generation of NOx, but also has saved and has sent, drawn
The power consumption of blower.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
In addition, it will be appreciated by those of skill in the art that although some embodiments in this include institute in other embodiments
Including certain features rather than other feature, but the combination of the feature of different embodiment means to be in the utility model
Within the scope of and form different embodiments.For example, embodiment claimed is appointed in claims above
Meaning one of can in any combination mode come using.The information disclosed in the background technology section is intended only to deepen to this
The understanding of the general background technology of utility model, and be not construed as recognizing or implying in any form that information composition has been
The prior art known in those skilled in the art.
Claims (10)
1. a kind of secondary air box, which is characterized in that including cabinet, damper and CO monitor；
The damper is rotatably arranged in the cabinet, for changing the cabinet by the rotation of the damper
The intake of air intake vent；
The CO monitor is arranged in the cabinet, and the display of the CO monitor is outside the cabinet.
2. secondary air box according to claim 1, which is characterized in that be connected with drive shaft on the damper；
One end of the drive shaft is fixedly connected with the damper, and the other end is arranged outside the cabinet.
3. secondary air box according to claim 2, which is characterized in that the other end of the drive shaft is provided with handle.
4. secondary air box according to claim 2, which is characterized in that the other end of the drive shaft is provided with rotational positioning
Device can position the position of the drive shaft.
5. secondary air box according to claim 4, which is characterized in that the rotation positioning device includes locating rod, positioning
Pin and positioning plate；
One end of the locating rod is fixedly connected with one end that the drive shaft is arranged in outside the cabinet；
One end of the positioning pin is fixed at the other end of the locating rod；
The positioning plate is fixed on the outer wall of the cabinet, and multiple location holes are provided on the positioning plate；
The other end of the positioning pin is inserted in one of them described positioning hole, for preventing the damper from rotating.
6. secondary air box according to claim 2, which is characterized in that further include controller and driving motor；
The driving motor is fixed on the outer wall of the cabinet, and one outside the cabinet is arranged in the drive shaft
End is fixedly connected, and is able to drive the damper rotation；
The controller is fixed on the cabinet, and is connected respectively with the driving motor and the CO monitor signal
It connects, the rotational angle of the damper can be controlled according to the data that the CO monitor monitors.
7. secondary air box according to claim 1, which is characterized in that the air distribution mode of the air intake vent is matched for inverted triangle
Wind.
8. secondary air box according to claim 1, which is characterized in that the air intake vent is provided with demarcation plate, is used for institute
It states air intake vent and is divided into two；
One end of the demarcation plate is arranged in the damper, for adjusting the intake of any side of the demarcation plate.
9. a kind of burner, which is characterized in that including the described in any item secondary air box of claim 1-8.
10. a kind of boiler, which is characterized in that including burner as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821886696.2U CN209180981U (en) | 2018-11-15 | 2018-11-15 | Secondary air box, burner and boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821886696.2U CN209180981U (en) | 2018-11-15 | 2018-11-15 | Secondary air box, burner and boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209180981U true CN209180981U (en) | 2019-07-30 |
Family
ID=67373014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821886696.2U Active CN209180981U (en) | 2018-11-15 | 2018-11-15 | Secondary air box, burner and boiler |
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| Country | Link |
|---|---|
| CN (1) | CN209180981U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803738A (en) * | 2021-09-30 | 2021-12-17 | 鄂尔多斯市昊华国泰化工有限公司 | Low-nitrogen combustion boiler with built-in tuyere circulation structure and method |
| CN114321970A (en) * | 2021-11-09 | 2022-04-12 | 广东大唐国际潮州发电有限责任公司 | Secondary bellows pressure real-time automatic regulating guiding device and octagonal double-tangential circle pulverized coal boiler |
-
2018
- 2018-11-15 CN CN201821886696.2U patent/CN209180981U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803738A (en) * | 2021-09-30 | 2021-12-17 | 鄂尔多斯市昊华国泰化工有限公司 | Low-nitrogen combustion boiler with built-in tuyere circulation structure and method |
| CN113803738B (en) * | 2021-09-30 | 2024-04-26 | 鄂尔多斯市昊华国泰化工有限公司 | Low-nitrogen combustion boiler with built-in air port circulation structure and method |
| CN114321970A (en) * | 2021-11-09 | 2022-04-12 | 广东大唐国际潮州发电有限责任公司 | Secondary bellows pressure real-time automatic regulating guiding device and octagonal double-tangential circle pulverized coal boiler |
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