CN103868065B - Combustor and combustion system - Google Patents
Combustor and combustion system Download PDFInfo
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- CN103868065B CN103868065B CN201410135512.9A CN201410135512A CN103868065B CN 103868065 B CN103868065 B CN 103868065B CN 201410135512 A CN201410135512 A CN 201410135512A CN 103868065 B CN103868065 B CN 103868065B
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Abstract
The invention relates to a combustor and a combustion system. The combustor comprises a primary combustion section and a secondary combustion section, wherein the primary combustion section is of a hollow pipe structure and comprises a mixing area and a primary combustion area, the mixing area and the primary combustion area are communicated through fluid, the mixing area is close to the outer side of the primary combustion section, the secondary combustion section is of a hollow pipe structure and connected to the inner end of the primary combustion section and comprises a secondary combustion area, the secondary combustion area and the primary combustion area are communicated through fluid, a fuel inlet and a primary combustion air inlet are formed in the outer side of the mixing area, and a secondary combustion air inlet is formed in the outer side of the secondary combustion area. When the combustor is used for production, the amount of discharged NOx can be effectively reduced, and environment protection is facilitated.
Description
Technical field
The present invention relates to high-temp combustion technical field, particularly to a kind of burner.Moreover, it relates to a kind of bag
Include the combustion system of described burner.
Background technology
Industrial furnace is generally produced using burner, can obtain thermal-flame using burner.During production, burning
Device by fuel and combustion air mixing after-combustion, thus obtaining high-temperature flue gas.But the burner adopting in prior art is in combustion
Substantial amounts of NOx can be produced during burning, as an example, so that the fire box temperature of combustion furnace reaches 1200 DEG C, pre- in air
In the case of mixed coefficient a=1, during high-temp combustion, NOx discharge reaches 5000ppm.Therefore, it is badly in need of a kind of combustion of low NOx drainage amount
Burner.
Content of the invention
For above-mentioned problem, the present invention proposes a kind of burner, and carrying out production using this burner can be effective
Ground reduces NOx discharge, beneficial to environmental protection.Additionally, a kind of the invention allows for combustion system including said burner.
According to the first aspect of the invention it is proposed that a kind of burner, it includes：Primary combustion section, it is configured to hollow
Pipeline section, and include be in fluid communication mixed zone and primary combustion zone, mixed zone is near the outside of primary combustion section；Secondary combustion
Burn section, its inner end being configured to the pipeline section of hollow and being connected to primary combustion section, it includes intermediate zone, second-time burning
Area is in fluid communication with primary combustion zone；Wherein, the outside of mixed zone is provided with fuel inlet and primary air entrance, secondary
The outside of combustion zone is provided with secondary combustion-supporting air intake.
When being produced using the burner of the present invention, the quantity delivered due to primary air and secondary combustion-supporting air is divided
Fuel little Yu not given can burn completely required combustion air total amount, therefore, fuel is respectively in primary combustion zone and secondary
Burn incompletely in combustion zone, particularly in primary combustion zone, the oxygen concentration participating in burning is low, also exists in flame simultaneously
The reduction reaction of NO, thus reduce the generation of NOx to a certain extent.
In one embodiment, the side wall of second-time burning section is provided be in fluid communication second-time burning section inner side with secondary
The burner hearth exhaust gases passes of combustion zone.Using such structure, when burning in intermediate zone, burner hearth exhaust gases passes can be passed through
The burner hearth flue gas that volume inhales combustion furnace enters into intermediate zone, the oxygen being mixed into when making second-time burning of flue gas therefore in burner hearth
Concentration reduces, thus inhibiting the flame temperature of second-time burning, therefore significantly reduces the generation of NOx.
In a preferred embodiment, burner hearth exhaust gases passes extend to the outer end of second-time burning section.So that from one
The mixed gas that secondary combustion zone enters into intermediate zone are mixed by secondary combustion-supporting air and burner hearth flue gas simultaneously, thus effectively
Reduce the oxygen concentration around combustion flame.Further, the connectivity part of burner hearth exhaust gases passes and intermediate zone is towards secondary
Combustion zone is in enlarging shape.Thus accelerate diffusion in intermediate zone for the burner hearth flue gas, beneficial to oxygen concentration in intermediate zone
Reduction.
In one embodiment, the side wall of primary combustion section is provided with the axial direction with secondary combustion-supporting air intake even
Logical secondary combustion-supporting air duct.Thus primary air and secondary combustion-supporting can be supplied simultaneously in the outside of primary combustion section
Air, improves the convenience of combustion air supply.
In one embodiment, the aperture of mixed zone is not more than the aperture of primary combustion zone, and mixed zone is configured to certainly
It is in enlarging shape from inside to outside.Purpose using such structure is it is ensured that fuel can be abundant in mixed zone with primary air
Mixing, in addition can ensure that when burning in primary combustion zone that primary combustion section is not subject to excessive pressure.
In one embodiment, the aperture of primary combustion zone is less than the aperture of intermediate zone.Due in intermediate zone
Import secondary combustion-supporting air, or even burner hearth flue gas also can enter into wherein, the aperture of primary combustion zone is less than intermediate zone
Aperture can ensure that second-time burning section is not subject to excessive pressure it is ensured that the reliability of burner product.
In one embodiment, fuel inlet is gas nozzle, and primary air entrance is arranged at the week of gas nozzle
Enclose.Thus it is easy to the supply of fuel, and so that primary air can be sufficiently mixed with fuel.
In one embodiment, gas nozzle is silicon nitride combined silicon carbide material, and/or burner block is high temperature cast
Material.Improve the heat-resisting ability of burner.
According to the second aspect of the invention, additionally provide a kind of combustion system, this combustion system include 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 using the production of such combustion system
When, the combustion flame producing in intermediate zone sprays in burner hearth.
It should be noted that directional terminology " interior " used in the present invention refers to lean on when burner is attached on combustion furnace
The burner hearth of nearly combustion furnace is " interior ", and the direction away from the burner hearth of combustion furnace is " outward ".
Compared with prior art, it is an advantage of the current invention that burner hearth flue gas can be passed through when burning in intermediate zone
The burner hearth flue gas that passage volume inhales combustion furnace enters into intermediate zone, thus reduces the concentration of oxygen in intermediate zone.Stove
Thorax exhaust gases passes extend to the outer end of second-time burning section.So that enter into the mixing of intermediate zone from primary combustion zone
Gas is mixed by secondary combustion-supporting air and burner hearth flue gas simultaneously, thus being effectively reduced the oxygen concentration around combustion flame.Enter
One step ground, burner hearth exhaust gases passes are in enlarging shape with the connectivity part of intermediate zone towards intermediate zone.Thus accelerate burner hearth cigarette
Gas in the diffusion of intermediate zone, beneficial to the reduction of oxygen concentration in intermediate zone.
Brief description
Hereinafter will be based on embodiment and refer to the attached drawing is being described in more detail to the present invention.Wherein：
Fig. 1 is the sectional view of burner according to a preferred embodiment of the present invention；
In in figure, identical component is indicated by identical reference.Accompanying drawing is not drawn according to actual ratio.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in figure 1, burner proposed by the present invention includes primary combustion section 10 and second-time burning section 20, fuel and once
Combustion air carries out primary combustion after mixing first in primary combustion section 10, then enters back in second-time burning section 20 and carries out
Second-time burning, simultaneously secondary combustion-supporting air be directed in second-time burning section 20 participation second-time burning.This is described more fully below
Bright burner and its each several part.
It should be noted that fuel of the present invention is gaseous fuel, such as natural gas or coal gas etc..Separately
Outward, primary air and the quantity delivered of secondary combustion-supporting air are respectively smaller than the combustion-supporting sky needed for given fuel can burn completely
Gas total amount.As preferred example, primary air amount is about the 50～60% of combustion air total amount, secondary combustion-supporting air capacity
It is about the 40～50% of combustion air total amount.
As shown in figure 1, primary combustion section 10 is configured to the pipeline section of hollow, primary combustion section 10 includes the mixing being in fluid communication
Area 11 and primary combustion zone 12, mixed zone 11 is near the outside of primary combustion section 10.The outside of mixed zone 11 is provided with fuel and enters
Mouth and primary air entrance, mixed zone 11 is used for the mixing of fuel and primary air, the arrow in figure mixed zone 11
The direction of head is the flow direction of fuel and primary air.Preferably, as illustrated, fuel inlet is gas nozzle 13.And one
Secondary combustion air inlet 14 is arranged at gas nozzle 13 around, is thus easy to being sufficiently mixed of combustion gas and primary air.
Further, be provided with cyclone in figure primary air entrance 14 it is provided that stronger Whirl deposite tank, beneficial to combustion gas with
The mixing of primary air.
As shown in figure 1, second-time burning section 20 is likewise constructed to the pipeline section of hollow, second-time burning section 20 is connected to primary combustion
The inner end of section 10.Preferably, primary combustion section 10 and second-time burning section 20 can form as one.As illustrated, secondary combustion
Burn section 20 and include intermediate zone 21, intermediate zone 21 is in fluid communication with primary combustion zone 12.Complete once to fire by this fuel
Can not fully burn after burning, enter into intermediate zone 21 from primary combustion zone 12, carry out secondary in intermediate zone 21
Burning.It should be noted that the outside of intermediate zone 21（Namely near primary combustion zone）It is provided with secondary combustion-supporting air
Entrance 22, in order to provide secondary combustion-supporting air, secondary combustion-supporting air participates in the second-time burning in intermediate zone.
When being produced using the burner of the present invention, fuel respectively in primary combustion zone 12 and intermediate zone 21 not
Fully burn, cause ignition temperature to be less than theoretical temperature combustion, particularly in primary combustion zone 12, fuel overrich, once fires
Burn excess air coefficient and be less than 1, cause ignition temperature to be less than theoretical temperature combustion, the oxygen concentration being otherwise engaged in burning is low, with
Also there is the reduction reaction of NO, thus reducing the generation of NOx to a certain extent in Shi Huoyan.
As shown in figure 1, as preferred embodiment, the side wall of second-time burning section 20 arranges burner hearth exhaust gases passes 23, stove
Thorax exhaust gases passes 23 are in fluid communication inner side and the intermediate zone 21 of second-time burning section 20.It can be seen that second-time burning
The inner end in area 21 is unlimited, and flame and high-temperature flue gas for fuel second-time burning spray in burner hearth.And burner hearth flue gas
Can be by the burner hearth cigarette of burner hearth exhaust gases passes volume 23 suction combustion furnaces when the setting of passage 23 can be burnt in intermediate zone
Gas enters into intermediate zone 21, and the oxygen concentration being mixed into when making second-time burning of therefore burner hearth flue gas reduces, thus suppressing
The flame temperature of fuel second-time burning, therefore significantly reduces the generation of NOx.
Preferably, as illustrated, burner hearth exhaust gases passes 23 extend to the outer end of second-time burning section 20.In figure burner hearth flue gas
The direction of arrow in passage 23 is the flow direction of burner hearth flue gas, so that entering into intermediate zone 21 from primary combustion zone 12
Mixed gas are mixed by secondary combustion-supporting air and burner hearth flue gas simultaneously, thus the oxygen being effectively reduced around combustion flame is dense
Degree.Further, burner hearth exhaust gases passes 23 and the connectivity part 24 of intermediate zone 21 are in enlarging shape towards intermediate zone 21.Figure
The direction of arrow of middle connectivity part 24 is the flow direction of burner hearth flue gas, thus accelerating expansion in intermediate zone 21 for the burner hearth flue gas
Dissipate, beneficial to the reduction of oxygen concentration in intermediate zone 21.
As preferred embodiment, the side wall of primary combustion section 10 is provided with to enter with secondary combustion-supporting air in the axial direction
The secondary combustion-supporting air ducts 16 of mouth 22 connection.The direction of arrow in figure secondary combustion-supporting air duct 16 is secondary combustion-supporting air
Flow direction, thus can be supplied simultaneously to primary air and secondary combustion-supporting air in the outside of primary combustion section 10, raising helps
The convenience of combustion air supply.
Preferably, the aperture of mixed zone 11 is not more than the aperture of primary combustion zone 12 it is ensured that firing in primary combustion zone
During burning, primary combustion section 10 is not subject to excessive pressure.In addition, mixed zone 11 is configured to be in enlarging shape from inside to outside.Ensure combustion
Material can be sufficiently mixed in mixed zone with primary air.Additionally, the gap in the aperture of mixed zone 11 and primary combustion zone 12
Make the root of primary combustion zone（Position near primary combustion zone）Form a smoke backflow area 15, beneficial to primary combustion
Flame stabilization.In the case of the primary air using Whirl deposite tank, burning adjusts ratio and is improved.
It is understood that as shown in figure 1, the aperture of primary combustion zone 12 is less than the aperture of intermediate zone 21.Due to
Import secondary combustion-supporting air in intermediate zone 21, or even burner hearth flue gas also can enter into wherein, the aperture of primary combustion zone 12
Can ensure that second-time burning section 20 is not subject to excessive pressure less than the aperture of intermediate zone 21.In addition, as illustrated, by
Gap in primary combustion zone 12 and the aperture of intermediate zone 21 makes the root of intermediate zone（Position by only mixed zone
Put）Form secondary flue gas recirculating zone 25, thus beneficial to the flame stabilization of second-time burning, beneficial to the regulation of burning.
Further, gas nozzle 13 is silicon nitride combined silicon carbide material.Burner block is high temperature mould material.Thus carry
The high heat-resisting ability of burner.For example, maximum operation (service) temperature can reach 1700 DEG C.
According to the second aspect of the invention, additionally provide a kind of combustion system, this combustion system include 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 using the production of such combustion system
When, in intermediate zone, the combustion flame producing and high-temperature flue gas spray in burner hearth.Contrast prior art, so that combustion furnace
Fire box temperature reach 1200 DEG C, in the case of air pre-mixing coefficient a=1, the burner using the present invention carries out high-temp combustion
When NOx discharge as little as 500ppm, the discharge capacity of NOx reduces by 90%.
Although by reference to preferred embodiment, invention has been described, in the situation without departing from the scope of the present invention
Under, it can be carried out with various improvement and part therein can be replaced with equivalent.The invention is not limited in public in literary composition
The specific embodiment opened, but include all technical schemes falling within the scope of the appended claims.
Claims (9)
1. a kind of burner is it is characterised in that include：
Primary combustion section, it is configured to the pipeline section of hollow, and includes mixed zone and the primary combustion zone being in fluid communication, described mixed
Close area near the outside of described primary combustion section；
Second-time burning section, its inner end being configured to the pipeline section of hollow and being connected to described primary combustion section, it includes secondary
Combustion zone, described intermediate zone is in fluid communication with described primary combustion zone；
Wherein, the outside of described mixed zone is provided with fuel inlet and primary air entrance, outside described intermediate zone
Side is provided with secondary combustion-supporting air intake,
The aperture of described mixed zone be not more than described primary combustion zone aperture, and described mixed zone be configured to be in from inside to outside
Enlarging shape.
2. burner according to claim 1 is it is characterised in that be provided with fluid even on the side wall of described second-time burning section
Lead to the inner side of described second-time burning section and the burner hearth exhaust gases passes of described intermediate zone.
3. burner according to claim 2 is it is characterised in that described burner hearth exhaust gases passes extend to described second-time burning
The outer end of section.
4. burner according to claim 3 is it is characterised in that described burner hearth exhaust gases passes and described intermediate zone
Connectivity part is in enlarging shape towards described intermediate zone.
5. burner according to claim 1 is it is characterised in that set in the axial direction on the side wall of described primary combustion section
It is equipped with the secondary combustion-supporting air duct connecting with described secondary combustion-supporting air intake.
6. burner according to any one of claim 1 to 5 is it is characterised in that the aperture of described primary combustion zone is little
Aperture in described intermediate zone.
7. burner according to claim 1, it is characterised in that described fuel inlet is gas nozzle, described once helps
Combustion air intake is arranged at around described gas nozzle.
8. burner according to claim 7 is it is characterised in that described gas nozzle is silicon nitride combined silicon carbide material
Expect, and/or burner block is high temperature mould material.
9. a kind of combustion system is it is characterised in that described combustion system includes combustion furnace and according to arbitrary in claim 1 to 8
Burner described in, 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 |
|---|---|---|---|
| CN201410135512.9A CN103868065B (en) | 2014-04-04 | 2014-04-04 | Combustor and combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410135512.9A CN103868065B (en) | 2014-04-04 | 2014-04-04 | Combustor and combustion system |
Publications (2)
| Publication Number | Publication Date |
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| CN103868065A CN103868065A (en) | 2014-06-18 |
| CN103868065B true CN103868065B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410135512.9A Active CN103868065B (en) | 2014-04-04 | 2014-04-04 | Combustor and combustion system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838900B (en) * | 2017-02-20 | 2024-05-24 | 海湾环境科技（北京）股份有限公司 | Burner and gas combustion method |
| CN110242952A (en) * | 2019-05-30 | 2019-09-17 | 国电浙江北仑第一发电有限公司 | A kind of low cooling air quantity burner using composite material spout |
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|---|---|---|---|---|
| EP0374423A2 (en) * | 1988-12-20 | 1990-06-27 | John Zink Gmbh | Atmospheric burner |
| US5735681A (en) * | 1993-03-19 | 1998-04-07 | The Regents, University Of California | Ultralean low swirl burner |
| US5957682A (en) * | 1996-09-04 | 1999-09-28 | Gordon-Piatt Energy Group, Inc. | Low NOx burner assembly |
| CN2743702Y (en) * | 2004-10-22 | 2005-11-30 | 中国石化集团洛阳石油化工工程公司 | High temperature combustion supporting air top burning energy saving environmental protection burner |
| CN101315187A (en) * | 2008-06-26 | 2008-12-03 | 天时燃烧设备（苏州）有限责任公司 | Anti-flashback nozzle and combustion device with the same |
| CN202902281U (en) * | 2012-10-15 | 2013-04-24 | 江苏焱鑫科技股份有限公司 | Back-mixing type multi-level burning low nitric oxide (NOx) gas burner |
| CN103277795A (en) * | 2013-05-27 | 2013-09-04 | 中国科学院广州能源研究所 | Gas burner capable of adjusting gas to be self-recycling |
| CN203893179U (en) * | 2014-04-04 | 2014-10-22 | 湖南巴陵炉窑节能股份有限公司 | Combustor and combustion system |
-
2014
- 2014-04-04 CN CN201410135512.9A patent/CN103868065B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0374423A2 (en) * | 1988-12-20 | 1990-06-27 | John Zink Gmbh | Atmospheric burner |
| US5735681A (en) * | 1993-03-19 | 1998-04-07 | The Regents, University Of California | Ultralean low swirl burner |
| US5957682A (en) * | 1996-09-04 | 1999-09-28 | Gordon-Piatt Energy Group, Inc. | Low NOx burner assembly |
| CN2743702Y (en) * | 2004-10-22 | 2005-11-30 | 中国石化集团洛阳石油化工工程公司 | High temperature combustion supporting air top burning energy saving environmental protection burner |
| CN101315187A (en) * | 2008-06-26 | 2008-12-03 | 天时燃烧设备（苏州）有限责任公司 | Anti-flashback nozzle and combustion device with the same |
| CN202902281U (en) * | 2012-10-15 | 2013-04-24 | 江苏焱鑫科技股份有限公司 | Back-mixing type multi-level burning low nitric oxide (NOx) gas burner |
| CN103277795A (en) * | 2013-05-27 | 2013-09-04 | 中国科学院广州能源研究所 | Gas burner capable of adjusting gas to be self-recycling |
| CN203893179U (en) * | 2014-04-04 | 2014-10-22 | 湖南巴陵炉窑节能股份有限公司 | Combustor and combustion system |
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| CN103868065A (en) | 2014-06-18 |
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