CN203893179U - Combustor and combustion system - Google Patents
Combustor and combustion system Download PDFInfo
- Publication number
- CN203893179U CN203893179U CN201420163758.2U CN201420163758U CN203893179U CN 203893179 U CN203893179 U CN 203893179U CN 201420163758 U CN201420163758 U CN 201420163758U CN 203893179 U CN203893179 U CN 203893179U
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- Prior art keywords
- zone
- combustion
- burner
- section
- primary combustion
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 114
- 239000000446 fuel Substances 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 19
- 239000003546 flue gas Substances 0.000 description 19
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000006722 reduction reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Abstract
The utility model relates to a combustor and a combustion system. The combustor comprises: a primary combustion section, wherein the primary combustion section is constructed to be a hollow pipe section and comprises a mixing zone and a primary combustion zone which are in fluid communication, the mixing zone is close to the outer side of the primary combustion section; and a secondary combustion section, wherein the secondary combustion section is constructed to be a hollow pipe section and is connected to the inner end portion of the primary combustion section, the secondary combustion section comprises a secondary combustion zone which is in fluid communication with the primary combustion zone; wherein, the outer side of the mixing zone is provided with a fuel inlet and a primary combustion air inlet, the outer side of the secondary combustion zone is provided with a secondary combustion air inlet. By adopting the combustor to perform production, NOx discharge can be effectively reduced, thereby facilitating environmental protection.
Description
Technical field
The utility model relates to high-temp combustion technical field, particularly a kind of burner.In addition, the utility model also relates to a kind of combustion system that comprises described burner.
Background technology
Industrial furnace adopts burner to produce conventionally, adopts burner can obtain thermal-flame.During production, burner is fuel and combustion air mixing after-combustion, thereby obtains high-temperature flue gas.But the burner of available technology adopting can produce a large amount of NOx in combustion process, as example, in order to make the fire box temperature of combustion furnace reach 1200 ℃, the in the situation that of air pre-mixing coefficient a=1, NOx discharge capacity reaches 5000ppm during high-temp combustion.Therefore, be badly in need of a kind of burner of low NOx drainage amount.
Utility model content
For above-mentioned problem, the utility model proposes a kind of burner, use this burner to produce and can effectively reduce NOx discharge capacity, be beneficial to environmental protection.In addition, the utility model has also proposed a kind of combustion system that comprises said burner.
According to first aspect of the present utility model, a kind of burner has been proposed, it comprises: primary combustion section, it is configured to the pipeline section of hollow, and comprises mixed zone and primary combustion zone that fluid is communicated with, and mixed zone is near the outside of primary combustion section; Second-time burning section, the inner end that it is configured to the pipeline section of hollow and is connected in primary combustion section, it comprises intermediate zone, intermediate zone is communicated with primary combustion zone fluid; Wherein, the arranged outside of mixed zone has fuel inlet and primary air entrance, and the arranged outside of intermediate zone has secondary combustion-supporting air intake.
While adopting burner of the present utility model to produce, due to the quantity delivered of primary air and secondary combustion-supporting air is less than respectively given fuel can the required combustion air total amount of completing combustion, therefore, fuel is burn incompletely in primary combustion zone and intermediate zone respectively, particularly in primary combustion zone, the oxygen concentration that participates in burning is low, also has the reduction reaction of NO simultaneously, thereby reduced to a certain extent the generation of NOx in flame.
On the sidewall of second-time burning section in one embodiment,, be provided with fluid and be communicated with the inner side of second-time burning section and the burner hearth exhaust gases passes of intermediate zone.Adopt such structure, the burner hearth flue gas that can by burner hearth exhaust gases passes entrainment combustion furnace while burning in intermediate zone enters into intermediate zone, therefore in burner hearth, the oxygen concentration of sneaking into while making second-time burning of flue gas reduces, thereby the flame temperature that has suppressed second-time burning, has therefore reduced the generation of NOx effectively.
In a preferred embodiment, burner hearth exhaust gases passes extends to the outer end of second-time burning section.Make thus the mist that enters into intermediate zone from primary combustion zone by secondary combustion-supporting air and burner hearth flue gas, be mixed, thereby effectively reduce combustion flame oxygen concentration around simultaneously.Further, the connectivity part of burner hearth exhaust gases passes and intermediate zone is enlarging shape towards intermediate zone.Accelerate thus the diffusion of burner hearth flue gas in intermediate zone, be beneficial to the reduction of oxygen concentration in intermediate zone.
On the sidewall of primary combustion section in one embodiment,, along axis direction, be provided with the secondary combustion-supporting air duct being communicated with secondary combustion-supporting air intake.Can supply with primary air and secondary combustion-supporting air in the outside of primary combustion section thus simultaneously, improve the convenience that combustion air is supplied with.
In one embodiment, the aperture of mixed zone is not more than the aperture of primary combustion zone, and mixed zone is configured to be from inside to outside enlarging shape.Adopt the object of such structure to be, guarantee that fuel can fully mix in mixed zone with primary air, when burning in primary combustion zone, can guarantee that in addition primary combustion Duan Buhui bears excessive pressure.
In one embodiment, the aperture of primary combustion zone is less than the aperture of intermediate zone.Owing to importing secondary combustion-supporting air in intermediate zone, even burner hearth flue gas also can enter into wherein, and the aperture that the aperture of primary combustion zone is less than intermediate zone can guarantee that second-time burning Duan Buhui bears excessive pressure, guarantees the reliability of burner product.
In one embodiment, fuel inlet is gas nozzle, and primary air entrance is arranged at gas nozzle around.Be convenient to thus the supply of fuel, and can be so that primary air can fully mix with fuel.
In one embodiment, gas nozzle is silicon nitride combined silicon carbide material, and/or burner block is high temperature mould material.Improved the heat-resisting ability of burner.
According to second aspect of the present utility model, a kind of combustion system is also provided, this combustion system comprises combustion furnace and according to burner mentioned above, the burner hearth of combustion furnace is arranged at the inner side of second-time burning section.When adopting such combustion system to produce, the combustion flame producing in intermediate zone sprays in burner hearth.
It should be noted that, the directional terminology that the utility model is used " interior " refers to that when burner is mounted on combustion furnace the burner hearth near combustion furnace is " interior ", and is " outward " away from the direction of the burner hearth of combustion furnace.
Compared with prior art, the utility model has the advantage of, the burner hearth flue gas that can by burner hearth exhaust gases passes entrainment combustion furnace while burning in intermediate zone enters into intermediate zone, has reduced thus the concentration of oxygen in intermediate zone.Burner hearth exhaust gases passes extends to the outer end of second-time burning section.Make thus the mist that enters into intermediate zone from primary combustion zone by secondary combustion-supporting air and burner hearth flue gas, be mixed, thereby effectively reduce combustion flame oxygen concentration around simultaneously.Further, the connectivity part of burner hearth exhaust gases passes and intermediate zone is enlarging shape towards intermediate zone.Accelerate thus burner hearth flue gas in the diffusion of intermediate zone, be beneficial to the reduction of oxygen concentration in intermediate zone.
Accompanying drawing explanation
To the utility model, be described in more detail based on embodiment and with reference to accompanying drawing hereinafter.Wherein:
Fig. 1 is according to the sectional view of the burner of a preferred embodiment of the present utility model;
In the drawings, identical member is indicated by identical Reference numeral.Accompanying drawing is not according to actual scale.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, the burner the utility model proposes comprises primary combustion section 10 and second-time burning section 20, first fuel and primary air carry out primary combustion after the interior mixing of primary combustion section 10, and then enter into second-time burning section 20 and carry out second-time burning, secondary combustion-supporting air is directed in second-time burning section 20 and participates in second-time burning simultaneously.To describe burner of the present utility model and each several part thereof in detail below.
It should be noted that, fuel described in the utility model is gaseous fuel, such as natural gas or coal gas etc., all can.In addition, the quantity delivered of primary air and secondary combustion-supporting air be less than respectively given fuel can the required combustion air total amount of completing combustion.As preferred example, primary air amount is about 50～60% of combustion air total amount, and secondary combustion-supporting air capacity is about 40～50% of combustion air total amount.
As shown in Figure 1, primary combustion section 10 is configured to the pipeline section of hollow, and primary combustion section 10 comprises the 11He primary combustion zone, mixed zone 12 that fluid is communicated with, and mixed zone 11 is near the outside of primary combustion section 10.The arranged outside of mixed zone 11 has fuel inlet and primary air entrance, and mixed zone 11 is for the mixing of fuel and primary air, and the direction of the arrow in figure in mixed zone 11 is the flow direction of fuel and primary air.Preferably, as shown in the figure, fuel inlet is gas nozzle 13.And primary air entrance 14 is arranged at gas nozzle 13 around, be convenient to thus fully mixing of combustion gas and primary air.Further, in figure, primary air entrance 14 places are provided with cyclone, and stronger eddy flow wind can be provided, and are beneficial to mixing of combustion gas and primary air.
As shown in Figure 1, second-time burning section 20 is configured to the pipeline section of hollow equally, and second-time burning section 20 is connected in the inner end of primary combustion section 10.Preferably, primary combustion section 10 and second-time burning section 20 can form as one.As shown in the figure, second-time burning section 20 comprises intermediate zone 21, and 21Yu primary combustion zone, intermediate zone 12 fluids are communicated with.Fuel can not fully burn after completing primary combustion thus, and from primary combustion zone, 12 enter into intermediate zone 21, carries out second-time burning in intermediate zone 21.It should be noted that, the outside of intermediate zone 21 (namely near primary combustion zone) is provided with secondary combustion-supporting air intake 22, and in order to secondary combustion-supporting air to be provided, secondary combustion-supporting air participates in the second-time burning in intermediate zone.
While adopting burner of the present utility model to produce, fuel is respectively at 12He intermediate zone, primary combustion zone 21 interior burn incompletelys, cause ignition temperature lower than theoretical temperature combustion, particularly in primary combustion zone 12, fuel overrich, primary combustion excess air coefficient is less than 1, cause ignition temperature lower than theoretical temperature combustion, the oxygen concentration that participates in addition burning is low, also has the reduction reaction of NO simultaneously, thereby reduced to a certain extent the generation of NOx in flame.
As shown in Figure 1, as preferred embodiment, burner hearth exhaust gases passes 23 is set on the sidewall of second-time burning section 20, burner hearth exhaust gases passes 23 fluids are communicated with inner side and the intermediate zone 21 of second-time burning section 20.As can be seen from the figure, the inner end of intermediate zone 21 opens wide, and for flame and the high-temperature flue gas of fuel second-time burning, sprays in burner hearth.And the burner hearth flue gas that can entrainment combustion furnace by burner hearth exhaust gases passes 23 that arranges in the time of can burning in intermediate zone of burner hearth exhaust gases passes 23 enters into intermediate zone 21, therefore the oxygen concentration of sneaking into while making second-time burning of burner hearth flue gas reduces, thereby the flame temperature that has suppressed fuel second-time burning, has therefore reduced the generation of NOx effectively.
Preferably, as shown in the figure, burner hearth exhaust gases passes 23 extends to the outer end of second-time burning section 20.The direction of arrow in figure in burner hearth exhaust gases passes 23 is the flow direction of burner hearth flue gas, make thus 12 mists that enter into intermediate zone 21 from primary combustion zone by secondary combustion-supporting air and burner hearth flue gas, be mixed, thereby effectively reduce combustion flame oxygen concentration around simultaneously.Further, the connectivity part 24 of burner hearth exhaust gases passes 23 and intermediate zone 21 21 is enlarging shape towards intermediate zone.In figure, the direction of arrow of connectivity part 24 is the flow direction of burner hearth flue gas, thereby accelerates the diffusion of burner hearth flue gas in intermediate zone 21, is beneficial to the reduction of intermediate zone 21 interior oxygen concentrations.
As preferred embodiment, on the sidewall of primary combustion section 10, along axis direction, be provided with the secondary combustion-supporting air duct 16 being communicated with secondary combustion-supporting air intake 22.The direction of arrow in figure in secondary combustion-supporting air duct 16 is the flow direction of secondary combustion-supporting air, can supply with primary air and secondary combustion-supporting air in the outside of primary combustion section 10 thus simultaneously, improves the convenience that combustion air is supplied with.
Preferably, the aperture of mixed zone 11 is not more than the aperture of primary combustion zone 12, and in the time of can guaranteeing to burn in primary combustion zone, primary combustion section 10 can not be born excessive pressure.In addition, mixed zone 11 is configured to be from inside to outside enlarging shape.Guarantee that fuel can fully mix in mixed zone with primary air.In addition, the gap in the aperture of 11Yu primary combustion zone, mixed zone 12 makes the root of primary combustion zone (near the position of primary combustion zone) form Yi Ci smoke backflow district 15, is beneficial to the flame stabilization of primary combustion.In the situation that adopt the primary air of eddy flow wind, burning regulates than being improved.
Be understandable that, as shown in Figure 1, the aperture of primary combustion zone 12 is less than the aperture of intermediate zone 21.Due to intermediate zone 21 interior importing secondary combustion-supporting air, even burner hearth flue gas also can enter into wherein, and the aperture that the aperture of primary combustion zone 12 is less than intermediate zone 21 can guarantee that second-time burning section 20 can not bear excessive pressure.In addition, as shown in the figure, because the gap in the aperture of 12He intermediate zone, primary combustion zone 21 makes the root (by the position of mixed zone only) of intermediate zone, form secondary flue gas recirculating zone 25, thereby be beneficial to the flame stabilization of second-time burning, be beneficial to the adjusting of burning.
Further, gas nozzle 13 is silicon nitride combined silicon carbide material.Burner block is high temperature mould material.Improved thus the heat-resisting ability of burner.For example, maximum operation (service) temperature can reach 1700 ℃.
According to second aspect of the present utility model, a kind of combustion system is also provided, this combustion system comprises combustion furnace and according to burner mentioned above, the burner hearth of combustion furnace is arranged at the inner side of second-time burning section.When adopting such combustion system to produce, the combustion flame and the high-temperature flue gas that in intermediate zone, produce spray in burner hearth.Contrast prior art, in order to make the fire box temperature of combustion furnace reach 1200 ℃, while adopting burner of the present utility model to carry out high-temp combustion in the situation that of air pre-mixing coefficient a=1, NOx discharge capacity is low to moderate 500ppm, and the discharge capacity of NOx reduces by 90%.
Although the utility model is described with reference to preferred embodiment, in the situation that not departing from scope of the present utility model, can carries out various improvement and can replace parts wherein with equivalent it.The utility model is not limited to disclosed specific embodiment in literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (10)
1. a burner, is characterized in that, comprising:
Primary combustion section, it is configured to the pipeline section of hollow, and comprises mixed zone and primary combustion zone that fluid is communicated with, and described mixed zone is near the outside of described primary combustion section;
Second-time burning section, the inner end that it is configured to the pipeline section of hollow and is connected in described primary combustion section, it comprises intermediate zone, described intermediate zone is communicated with described primary combustion zone fluid;
Wherein, the arranged outside of described mixed zone has fuel inlet and primary air entrance, and the arranged outside of described intermediate zone has secondary combustion-supporting air intake.
2. burner according to claim 1, is characterized in that, is provided with the burner hearth exhaust gases passes that fluid is communicated with inner side and the described intermediate zone of described second-time burning section on the sidewall of described second-time burning section.
3. burner according to claim 2, is characterized in that, described burner hearth exhaust gases passes extends to the outer end of described second-time burning section.
4. burner according to claim 3, is characterized in that, the connectivity part of described burner hearth exhaust gases passes and described intermediate zone is enlarging shape towards described intermediate zone.
5. burner according to claim 1, is characterized in that, on the sidewall of described primary combustion section, along axis direction, is provided with the secondary combustion-supporting air duct being communicated with described secondary combustion-supporting air intake.
6. burner according to claim 1, is characterized in that, the aperture of described mixed zone is not more than the aperture of described primary combustion zone, and described mixed zone is configured to be from inside to outside enlarging shape.
7. according to the burner described in any one in claim 1 to 6, it is characterized in that, the aperture of described primary combustion zone is less than the aperture of described intermediate zone.
8. burner according to claim 1, is characterized in that, described fuel inlet is gas nozzle, and described primary air entrance is arranged at described gas nozzle around.
9. burner according to claim 8, is characterized in that, described gas nozzle is silicon nitride combined silicon carbide material, and/or burner block is high temperature mould material.
10. a combustion system, is characterized in that, described combustion system comprises combustion furnace and according to the burner described in any one in claim 1 to 9, the burner hearth of described combustion furnace is arranged at the inner side of described second-time burning section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420163758.2U CN203893179U (en) | 2014-04-04 | 2014-04-04 | Combustor and combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420163758.2U CN203893179U (en) | 2014-04-04 | 2014-04-04 | Combustor and combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203893179U true CN203893179U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420163758.2U Expired - Lifetime CN203893179U (en) | 2014-04-04 | 2014-04-04 | Combustor and combustion system |
Country Status (1)
| Country | Link |
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| CN (1) | CN203893179U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868065A (en) * | 2014-04-04 | 2014-06-18 | 湖南巴陵炉窑节能股份有限公司 | Combustor and combustion system |
-
2014
- 2014-04-04 CN CN201420163758.2U patent/CN203893179U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868065A (en) * | 2014-04-04 | 2014-06-18 | 湖南巴陵炉窑节能股份有限公司 | Combustor and combustion system |
| CN103868065B (en) * | 2014-04-04 | 2017-02-15 | 湖南巴陵炉窑节能股份有限公司 | Combustor and combustion system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |