CN201106850Y - Axial blade vortex combustor - Google Patents
Axial blade vortex combustor Download PDFInfo
- Publication number
- CN201106850Y CN201106850Y CNU2007200748412U CN200720074841U CN201106850Y CN 201106850 Y CN201106850 Y CN 201106850Y CN U2007200748412 U CNU2007200748412 U CN U2007200748412U CN 200720074841 U CN200720074841 U CN 200720074841U CN 201106850 Y CN201106850 Y CN 201106850Y
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- CN
- China
- Prior art keywords
- burner
- axial blade
- air duct
- secondary air
- turbulent burner
- Prior art date
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- Expired - Lifetime
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Abstract
The utility model relates to an axle-direction-vane turbulent burner, which comprises a primary wind channel and a secondary wind channel. The front ends of all wind channels of the burner are provided with necking ends. Due to the structure, the axle-direction-vane turbulent burner of the utility model can improve the intensity of rotary flow of air and gas fuel, effectively control the burnout time of fuel, therefore avoiding slag bonding and high-temperature corrosion of the hearth, and reduce the discharge of NO<x>.
Description
Technical field
The utility model belongs to the field of boilers in the mechanical engineering, and relating to gas is the boiler of fuel, relates in particular to the axial blade turbulent burner that is applied to station boiler.
Background technology
The turbulent burner of the station boiler of using both at home and abroad is varied, wherein, the axial blade turbulent burner of burning gases fuel is to utilize to be arranged in the axial blade of burner with air (secondary wind) and gaseous fuel (wind of multiple gases fuel general designation) rotation, so that primary and secondary air is fully mixed, make gaseous fuel obtain sufficient oxygen and be able to after-flame.But at present, section axial blade turbulent burner in labour occurs under the identical power situation, the conflicting problem of the swirl strength and the length of flame, be in service for guaranteeing the abundant mixing of oxygen and gaseous fuel, will improve swirl strength by increasing power, under these circumstances, make the length of flame increase again, cause the furnace wall cooling on burner region opposite to cause slagging scorification and burner hearth high temperature corrosion danger.Simultaneously, go back swirl strength that ubiquity axial blade turbulent burner produces often not as the defective of volute type turbulent burner.In addition, the coordinated development of economy and environment also more and more is subjected to people's attention, and compatriots are also more and more higher to the understanding of environmental protection.And the axial blade turbulent burner ubiquity load adaptability difference problem that present oil-burning gas-fired boiler uses.Promptly under certain load, can reach completing combustion substantially, but when underload, have incomplete combustion, control low oxygen combustion difficulty, NO
xProblems such as discharging height are bigger to environmental disruption.
The utility model content
The technical problem that the utility model solves for provide a kind of improve the swirl strength of air fuel, effectively control fuel tail-off time, prevent burner hearth slagging scorification and burner hearth high temperature corrosion and reduce NO
xThe axial blade turbulent burner of discharging is to overcome the deficiency that prior art exists.
For solving the problems of the technologies described above, a kind of axial blade turbulent burner of the present utility model adopts following technical scheme:
This axial blade turbulent burner comprises air channel and secondary air duct, and it is characterized in that: the front end in described each air channel has reducing.
Secondary air duct and outer secondary air duct in described secondary air duct is divided into, described interior secondary air duct, air channel, an outer secondary air duct burn the organ pipe wall by three grate firings and form and be provided with from inside to outside successively.
Described reducing angle [alpha] is 0 °＜α≤90 °.
Described reducing angle [alpha] is preferably 15 °≤α≤60 °.
More preferably 15 ° or 30 ° or 45 ° or 60 ° of described reducing angle [alpha].
Adopt technique scheme, after the front end of burner has reducing, have following advantage:
1, can reduce the tail-off time, reduce combustion flame length, prevent that the furnace wall cooling on burner region opposite from causing slagging scorification and burner hearth high temperature corrosion.
2, make rotating jet totally become convergent-divergent shape, suitably postponed formation recirculating zone NO
xExhaust position.Like this, postpone burning on the one hand, reduced NO
xDischarging; On the other hand, ignition point position be can control, burner slagging scorification and high temperature corrosion effectively prevented.
3, under same swirling number condition, can obtain bigger spread angle of jet, promptly obtain bigger recirculating zone.Like this, axial blade turbulent burner of the present utility model just becomes the low-drag type burner, can overcome the defective of swirl strength not as the volute type turbulent burner simultaneously thus.
Therefore, axial blade turbulent burner of the present utility model have the swirl strength that improves air fuel, effectively control fuel tail-off time, prevent burner hearth slagging scorification and burner hearth high temperature corrosion and reduce NO
xThe advantage of discharging.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is elaborated:
Fig. 1 is a structural representation of the present utility model;
Among the figure:
1, boiler setting 2, burner tube wall 21, interior secondary air duct
22, air channels 23, outer secondary air duct 3, reducing
The specific embodiment
Embodiment 1
As shown in Figure 1, the axial blade turbulent burner of present embodiment, the leading portion of this burner 100 partly is positioned on the boiler setting 1, comprises from inside to outside interior secondary air duct 21, air channel 22, the outer secondary air duct 23 successively that burns by three grate firings that organ pipe wall 2 forms.Interior secondary air duct 21 and outer secondary air duct 23 are used for feeding secondary wind (air), and one time air channel 22 is used to carry a wind (gaseous fuel).This axial blade turbulent burner fully mixes air fuel by the rotation of axial blade, makes gaseous fuel obtain sufficient oxygen and is able to after-flame.For the swirl strength that improves air fuel, effectively control fuel tail-off time, prevent burner hearth slagging scorification and burner hearth high temperature corrosion and reduce NO
xDischarging, the front end in each air channel of burner has reducing 3, described reducing angle [alpha]=15 °.
The axial blade turbulent burner of present embodiment and embodiment 1 different place is, reducing angle [alpha]=30 °, and other structure is identical with embodiment 1.
The axial blade turbulent burner of present embodiment and embodiment 1 different place is, reducing angle [alpha]=45 °, and other structure is identical with embodiment 1.
Embodiment 4
The axial blade turbulent burner of present embodiment and embodiment 1 different place is, reducing angle [alpha]=60 °, and other structure is identical with embodiment 1.
The foregoing description is an example with three layers of air channel (interior secondary air duct 21, air channel 22, outer secondary air duct 23) all, and burner can further classification on each air channel structure according to actual conditions certainly.
The axial blade turbulent burner adopts said structure, has following advantage:
1, can reduce the tail-off time, reduce combustion flame length, prevent that the furnace wall cooling on burner region opposite from causing slagging scorification and burner hearth high temperature corrosion.
2, make rotating jet totally become convergent-divergent shape, suitably postponed formation recirculating zone NO
xExhaust position.Like this, postpone burning on the one hand, reduced NO
xDischarging; On the other hand, ignition point position be can control, burner slagging scorification and high temperature corrosion effectively prevented.
3, under same swirling number condition, can obtain bigger spread angle of jet, promptly obtain bigger recirculating zone.Like this, axial blade turbulent burner of the present utility model just becomes the low-drag type burner, can overcome the defective of swirl strength not as the volute type turbulent burner simultaneously thus.
But, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop on claim scope of the present utility model to variation, the modification of the above embodiment.
Claims (5)
1, a kind of axial blade turbulent burner comprises air channel and secondary air duct, and it is characterized in that: the front end in described each air channel has reducing.
2, axial blade turbulent burner according to claim 1, it is characterized in that: secondary air duct and outer secondary air duct in described secondary air duct is divided into, described interior secondary air duct, air channel, an outer secondary air duct burn the organ pipe wall by three grate firings and form and be provided with from inside to outside successively.
3, axial blade turbulent burner according to claim 1 is characterized in that: described reducing angle [alpha] is 0 °＜α≤90 °.
4, axial blade turbulent burner according to claim 1 is characterized in that: described reducing angle [alpha] is 15 °≤α≤60 °.
5, axial blade turbulent burner according to claim 1 is characterized in that: described reducing angle [alpha] is 15 ° or 30 ° or 45 ° or 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200748412U CN201106850Y (en) | 2007-09-20 | 2007-09-20 | Axial blade vortex combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200748412U CN201106850Y (en) | 2007-09-20 | 2007-09-20 | Axial blade vortex combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201106850Y true CN201106850Y (en) | 2008-08-27 |
Family
ID=39958657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200748412U Expired - Lifetime CN201106850Y (en) | 2007-09-20 | 2007-09-20 | Axial blade vortex combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201106850Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539245A (en) * | 2018-10-30 | 2019-03-29 | 西安交通大学 | A kind of pulverized coal preheating solution decoupling combustion device |
| CN110177976A (en) * | 2017-01-17 | 2019-08-27 | 西门子股份公司 | Burner nozzle with air duct structure and fuel channel structures for burner and the method for manufacturing the burner nozzle |
-
2007
- 2007-09-20 CN CNU2007200748412U patent/CN201106850Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110177976A (en) * | 2017-01-17 | 2019-08-27 | 西门子股份公司 | Burner nozzle with air duct structure and fuel channel structures for burner and the method for manufacturing the burner nozzle |
| CN109539245A (en) * | 2018-10-30 | 2019-03-29 | 西安交通大学 | A kind of pulverized coal preheating solution decoupling combustion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080827 |