CN204574022U - Many bluff bodies air-coal separating coal powder burner - Google Patents
Many bluff bodies air-coal separating coal powder burner Download PDFInfo
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- CN204574022U CN204574022U CN201520201125.0U CN201520201125U CN204574022U CN 204574022 U CN204574022 U CN 204574022U CN 201520201125 U CN201520201125 U CN 201520201125U CN 204574022 U CN204574022 U CN 204574022U
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- link stopper
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- separated link
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Abstract
The utility model relates to a kind of coal burner, is specially a kind of many bluff bodies for tangentialfiring boiler furnace air-coal separating coal powder burner.Be characterized in: the burner inlet elbow lower shell in described burner inlet elbow, burner inlet elbow upper shell are provided with described fixedly separated link stopper I, space between described burner inlet elbow lower shell and burner inlet elbow upper shell is provided with fixedly separated link stopper II, and described pulverized coal concentrator front is provided with fixedly separated link stopper III.Many bluff bodies air-coal separating coal burner reduces on the basis of oxynitride discharge concentration at original air-coal separating coal burner and improves about 40%, by original air-coal separating coal burner oxynitride discharge 300mg/Nm
3(6%O
2) below, existing many bluff bodies air-coal separating coal burner oxynitrides is reduced to 200mg/Nm
3(6%O
2) below.
Description
Technical field
The utility model relates to a kind of coal burner, is specially a kind of many bluff bodies for tangentialfiring boiler furnace air-coal separating coal powder burner.
Background technology
Pulverized coal bias combustion just extensive use in generating plant pulverized coal boiler, the form of coal powder light-dark also has various forms, but substantially adopts horizontal bias to be separated.But can not reach design load for current domestic power boiler burning ature of coal, use the station boiler of the fuel such as a large amount of soft coal, meager coal or anthracite, existing level dense-dilute burner combustion technology all can reach the low NO of steady combustion not to the utmost
x, Anti-slagging and high temperature corrosion, the indexs such as long service life, can not meet power plant's production run requirement, therefore solve the problem extremely urgent.
Summary of the invention
The purpose of this utility model is to provide simple, with low cost, the low NO of a kind of structure
xmany bluff bodies air-coal separating coal powder burner of discharge, burning highly effective, Anti-slagging and high temperature corrosion, burner long service life.The purpose of this utility model is achieved in that a kind of many bluff bodies air-coal separating coal powder burner, by burner inlet elbow, fixedly separated link stopper, burner inlet circumference joint, pulverized coal concentrator, adjustable link stopper, homogenizing plate, burner nozzle, bluff body, spout is biased overfire air port outward, flange, turning cylinder, burner inlet elbow lower shell, burner inlet elbow upper shell is formed, it is characterized in that: the burner inlet elbow lower shell in described burner inlet elbow, burner inlet elbow upper shell is provided with described fixedly separated link stopper I, space between described burner inlet elbow lower shell and burner inlet elbow upper shell is provided with fixedly separated link stopper II, described pulverized coal concentrator front is provided with fixedly separated link stopper III.Described fixedly separated link stopper I, fixedly separated link stopper II, fixedly separated link stopper III gradient α 1, α 2, α 3 are 5 ° ~ 45 °, and described adjustable stops and horizontal gradient angle β are 15 ° ~ 45 °, control breeze airflow cocnentration factor.Described homogenizing plate length-width ratio is 0.5 ~ 4.0, and homogenizing plate two draft angle γ 1 are 25 ° ~ 65 °, γ 2 is 110 ° ~ 160 °.The length-width ratio of described bluff body is 1.0 ~ 4.0, and bluff body draft angle δ is 10 ° ~ 60 °.Described fixedly separated link stopper I, fixedly separated link stopper II, fixedly separated link stopper III chamfer length L1, L2, L3 length is respectively 30 ~ 200mm, described fixedly separated link stopper I is 50 ~ 200mm apart from combustor elbow entrance length T4, described fixedly separated link stopper II horizontal range is 50-450mm apart from the horizontal range S1 of fixedly separated link stopper I, vertical range T1 is 50-500mm, described fixedly separated link stopper III horizontal range is 50-600mm apart from the horizontal range S2 of fixedly separated link stopper I, vertical range T2 is 50-700mm, horizontal range S4 between fixedly separated link stopper III and pulverized coal concentrator is 50-400mm, adjustable stops is 150 ~ 800mm apart from the horizontal range S3 of the fixedly separated block I of entrance first, vertical range T3 is 100 ~ 500mm, adjustable stops 5 and the one-sided space L4 of pulverized coal concentrator are 3 ~ 5mm, homogenizing plate and burner nozzle head distance S5 are 350 ~ 600mm.Described burner nozzle is provided with two to four layers of horizontally disposed bluff body.
The comparatively front air-coal separating coal burner advantage of many bluff bodies air-coal separating coal burner: calculated by modification Experience for many years and simulative optimization, have adjusted the position of burner internal block and adopt the design concept of many bluff bodies, adopt such measure, effectively can postpone the mixing of bias pulverized coal air-flow, reduce in combustion process containing N group and O
2reaction chance, effectively reduces NOx generation amount.The dense First air breeze airflow of high concentration, the ignition and steady combustion performance of strengthening First air, utilizes early stage volatile matter of separating out fast effectively to reduce NOx generation amount, can keep the after-flame degree of high pulverized coal particle.In reduction oxynitride discharge concentration, many bluff bodies air-coal separating coal burner reduces on the basis of oxynitride discharge concentration at original air-coal separating coal burner and improves about 40%, by original air-coal separating coal burner oxynitride discharge 300mg/Nm
3(6%O
2) below, existing many bluff bodies air-coal separating coal burner oxynitrides is reduced to 200mg/Nm
3(6%O
2) below; In Anti-slagging and high temperature corrosion, First air spout outlet surrounding is designed with spout biased overfire air port 9 outward, both ensure that coal dust efficient burning, can be good at protection First air spout when burner rich-lean ratio is very large simultaneously, spout is made to be biased Secondary Air outward in back-fire side (water-cooling wall side because spout is biased overfire air port 9 outward again, namely the right side in schematic diagram is supposed) and be 1.6 ~ 2.6 to the ratio of fiery side (namely supposing the left side in schematic diagram), ensure water-cooling wall side oxidizing atmosphere, prevent slagging scorification and high temperature corrosion; Burner inlet elbow 1 inner surface, fixedly separated link stopper 2 surface, burner inlet circumference joint 3 inner surface, pulverized coal concentrator 4 inner surface and adjustable link stopper 5 surface adopt high-temperature and wear-proof, this material is wear-resistant ceramic or polynary high-alloy metal material, improve burner operation face wear resistance at elevated temperature, extend burner service life.This patent coal burner adapts to the burning needs of different ature of coal, is particularly adapted to the ature of coal fuel such as soft coal, meager coal or anthracite, the change of flammability and the stable requirement of flammability.
Accompanying drawing explanation
Fig. 1 is dense light type structural principle generalized section under the utility model; Fig. 2 is light dense type structural principle generalized section under the utility model; Fig. 3 is the structural principle generalized section that under the utility model, dense light type has calibrated sizes; Fig. 4 is the structural principle generalized section that under the utility model, light dense type has calibrated sizes; Fig. 5 be the utility model A to burner nozzle, biased overfire air port, with two-layer bluff body structural principle generalized section; Fig. 6 be the utility model A to burner nozzle, biased overfire air port, with four layers of bluff body structural principle generalized section; Fig. 7 is dense light type B-B section pulverized coal concentrator, adjustable stops, turning cylinder, homogenizing plate structural principle generalized section under the utility model; Fig. 8 is light dense type B-B section pulverized coal concentrator, adjustable stops, turning cylinder, homogenizing plate structural principle generalized section under the utility model; Fig. 9 is the utility model burner inlet circumference joint structural principle generalized section; Figure 10 is dense light type burner inlet elbow and fixedly separated link stopper I 2-1 structural principle generalized section under the utility model; Figure 11 is light dense type burner inlet elbow and fixedly separated link stopper I 2-1 structural principle generalized section under the utility model; Figure 12 is dense light type burner inlet elbow and fixedly separated link stopper II 2-2 structural principle generalized section under the utility model; Figure 13 is light dense type burner inlet elbow and fixedly separated link stopper II 2-2 structural principle generalized section under the utility model; Figure 14 is dense light type burner inlet circumference joint and fixedly separated link stopper III 2-3 structural principle generalized section under the utility model; Figure 15 is light dense type burner inlet circumference joint and fixedly separated link stopper III 2-3 structural principle generalized section under the utility model; Figure 16 is dense light type burner adjustable stops and turning cylinder β angle syndeton principle generalized section under the utility model; Figure 17 is light dense type burner adjustable stops and turning cylinder β angle syndeton principle generalized section under the utility model; Figure 18 is γ 1, γ 2 jiaos of schematic diagrames that under the utility model, dense light type burner homogenizing plate structural principle amplifies; Figure 19 is γ 1, γ 2 jiaos of schematic diagrames that under the utility model, light dense type burner homogenizing plate structural principle amplifies; Figure 20 is the utility model burner bluff body structural principle generalized section; Figure 21 is that under the utility model, dense light type burner entrance elbow upper shell 13 is connected coal dust intermixture with fixedly separated link stopper I 2-1 and moves towards structural principle generalized section; Figure 22 is that under the utility model, light dense type burner inlet elbow lower shell 12 is connected coal dust intermixture with fixedly separated link stopper I 2-1 and moves towards structural principle generalized section; Figure 23 is that under the utility model, dense light type burner fixedly separated link stopper II 2-2 and coal dust intermixture move towards structural principle generalized section; Figure 24 is that under the utility model, light dense type burner fixedly separated link stopper II 2-2 and coal dust intermixture move towards structural principle generalized section; Figure 25 is that under the utility model, dense light type burner inlet circumference joint is connected coal dust intermixture with fixedly separated link stopper III 2-3 and moves towards structural principle generalized section; Figure 26 is that under the utility model, light dense type burner inlet circumference joint is connected coal dust intermixture with fixedly separated link stopper III 2-3 and moves towards structural principle generalized section; Figure 27 is that under the utility model, dense light type burner adjustable stops is connected β angle coal dust intermixture and moves towards structural principle generalized section with turning cylinder; Figure 28 is that under the utility model, light dense type burner adjustable stops is connected β corner connection coal dust intermixture and moves towards structural principle generalized section with turning cylinder; Figure 29 is that under the utility model, structural principle generalized section is moved towards in dense light moulded coal powder mixture motion flow field; Figure 30 is that under the utility model, structural principle generalized section is moved towards in light dense moulded coal powder mixture motion flow field.
Detailed description of the invention
The utility model is by burner inlet elbow 1, fixedly separated link stopper 2, burner inlet circumference joint 3, pulverized coal concentrator 4, adjustable link stopper 5, homogenizing plate 6, burner nozzle 7, bluff body 8, spout is biased overfire air port 9 outward, flange 10, turning cylinder 11, burner inlet elbow lower shell 12, burner inlet elbow upper shell 13, form, it is characterized in that: the burner inlet elbow lower shell 12 in described burner inlet elbow 1, burner inlet elbow upper shell 13 is provided with described fixedly separated link stopper I 2-1, space between described burner inlet elbow lower shell 12 and burner inlet elbow upper shell 13 is provided with fixedly separated link stopper II 2-2, described pulverized coal concentrator 4 front is provided with fixedly separated link stopper III 2-3.Described fixedly separated link stopper I 2-1, fixedly separated link stopper II 2-2, fixedly separated link stopper III 2-3 gradient α 1, α 2, α 3 are 5 ° ~ 45 °, described adjustable stops 5 is 15 ° ~ 45 ° with horizontal gradient angle β, controls breeze airflow cocnentration factor.Described homogenizing plate 6 length-width ratio is 0.5 ~ 4.0, and homogenizing plate 6 two draft angle γ 1 are 25 ° ~ 65 °, γ 2 is 110 ° ~ 160 °.The length-width ratio of described bluff body 8 is 1.0 ~ 4.0, and bluff body draft angle δ is 10 ° ~ 60 °.Described fixedly separated link stopper I 2-1, fixedly separated link stopper II 2-2, fixedly separated link stopper III 2-3 chamfer length L1, L2, L3 length is respectively 30 ~ 200mm, described fixedly separated link stopper I 2-1 is 50 ~ 200mm apart from combustor elbow entrance length T4, described fixedly separated link stopper II 2-2 horizontal range is 50-450mm apart from the horizontal range S1 of fixedly separated link stopper I 2-1, vertical range T1 is 50-500mm, described fixedly separated link stopper III 2-3 horizontal range is 50-600mm apart from the horizontal range S2 of fixedly separated link stopper I 2-1, vertical range T2 is 50-700mm, horizontal range S4 between fixedly separated link stopper 2-3 and pulverized coal concentrator 4 is 50-400mm, adjustable stops 5 is 150 ~ 800mm apart from the horizontal range S3 of the fixedly separated block 2-1 of entrance first, vertical range T3 is 100 ~ 500mm, adjustable stops 5 and the one-sided space L4 of pulverized coal concentrator 4 are 3 ~ 5mm, homogenizing plate 6 and burner nozzle 7 head distance S5 are 350 ~ 600mm.Described burner nozzle 7 is provided with two to four layers of horizontally disposed bluff body 8.Further illustrate below in conjunction with the principle concrete structure of accompanying drawing to this patent.Homogenizing plate 6 ensures uniform stream after upper and lower air-coal separating, ensure that concentrated phase First air catches fire in advance, spout is biased being mixed in time of overfire air port 9 outward simultaneously, both ensure that coal dust efficient burning, again due to spout outward biased overfire air port 9 make spout outward biased Secondary Air be 1.6 ~ 2.6 at back-fire side (water-cooling wall side) with the ratio to fiery side, ensure water-cooling wall side oxidizing atmosphere, prevent slagging scorification and high temperature corrosion.
The utility model describes operation principle of the present utility model and the course of work by reference to the accompanying drawings in detail: burner inlet elbow 1 and burner inlet have an area of joint 3 and adopt flange 11 to be connected, burner inlet circumference joint 3 adopts welding procedure to be connected with pulverized coal concentrator 4, and pulverized coal concentrator 4 adopts welding procedure to be connected with burner nozzle 7.Burner inlet elbow 1, in burner inlet circumference joint 3, fixedly separated link stopper I 2-1 is set, fixedly separated link stopper II 2-2, fixedly separated link stopper III 2-3, fixedly separated link stopper I 2-1, fixedly separated link stopper II 2-2, fixedly separated link stopper III 2-3 draft angle α 1, α 2, α 3 is 5 ° ~ 45 °, fixedly separated link stopper I 2-1, fixedly separated link stopper II 2-2, fixedly separated link stopper III 2-3 chamfer length L1, L2, L3 length is 30 ~ 200mm, fixedly separated link stopper I 2-1 is 50 ~ 200mm apart from combustor elbow entrance length T4, fixedly separated link stopper II 2-2 horizontal range is 50-450mm apart from the horizontal range S1 of fixedly separated link stopper I 2-1, vertical range T1 is 50-500mm, fixedly separated link stopper III 2-3 horizontal range is 50-600mm apart from the horizontal range S2 of fixedly separated link stopper I 2-1, vertical range T2 is 50-700mm, horizontal range S4 between fixedly separated link stopper 2-3 and pulverized coal concentrator 4 is 50-400mm, fixedly separated link stopper I 2-1, fixedly separated link stopper II 2-2, fixedly separated link stopper III 2-3 adopts welding procedure to be fixed on burner inlet elbow 1, in burner inlet circumference joint 3.One piece of adjustable link stopper 5 and one piece of homogenizing plate 6 are set in pulverized coal concentrator 4, adjustable link stopper 5 is fixed in pulverized coal concentrator 4 by turning cylinder 12, adjustable stops 5 is 150 ~ 800mm apart from the horizontal range S3 of the fixedly separated block 2-1 of entrance first, vertical range T3 is 100 ~ 500mm, adjustable stops 5 and the one-sided space L4 of pulverized coal concentrator 4 are 3 ~ 5mm, homogenizing plate 6 adopts welding procedure to be fixed on pulverized coal concentrator 4 with in circumference joint 3, homogenizing plate 6 one end and fixedly separated link stopper III 2-3 adopt welding procedure to fix, the length-width ratio of homogenizing plate 6 is 0.5 ~ 4.0, homogenizing plate 6 draft angle γ 1 is 25 ° ~ 65 °, homogenizing plate 6 draft angle γ 2 is 110 ° ~ 160 °, homogenizing plate 6 and burner nozzle 7 head distance S5 are 350 ~ 600mm.Burner nozzle 7 is provided with two to four layers of horizontally disposed bluff body 8 and spout biased overfire air port 9 outward, burner nozzle 7 adopts welding procedure to be connected with bluff body 8, burner nozzle 7 and spout outward biased overfire air port 9 adopt welding procedure to be connected, the length-width ratio of bluff body 8 is 1.0 ~ 4.0, bluff body 8 draft angle δ is 10 ° ~ 60 °, the right side edge of bluff body 8 is concordant with burner nozzle 7 right-side outlet edge, bluff body 8 equal distribution on vertical direction in burner nozzle 7.The governor motion of described described adjustable link stopper 5 comprises automatic adjusting mechanism and manual adjustments handle, and adjustable link stopper 5 both ends are inserted in the rotating shaft that governor motion is fixedly connected with.
Coal dust intermixture enters burner inlet elbow 1 by entrance, pulverized coal particle successively impinges upon fixedly separated link stopper I 2-1 respectively, fixedly separated link stopper II 2-2, on the inclined-plane of fixedly separated link stopper III 2-3, by pulverized coal particle and fixedly separated link stopper I 2-1, fixedly separated link stopper II 2-2, the shock of fixedly separated link stopper III 2-3 changes the direction of motion of pulverized coal particle, fixedly separated link stopper I 2-1, fixedly separated link stopper II 2-2, fixedly separated link stopper III 2-3 play the guiding role, coal dust intermixture is made to carry out preliminary air-coal separating, pulverized coal particle is by burner inlet elbow 1, burner inlet circumference joint 3 enters pulverized coal concentrator 4.Regulated by adjustable link stopper 5 further by the coal dust intermixture after fixedly separated link stopper I 2-1, fixedly separated link stopper II 2-2, fixedly separated link stopper III 2-3 carry out preliminary air-coal separating, and can change by based on fuel, the direction of motion after clashing into by regulating adjustable link stopper 5 Angulation changes pulverized coal particle, and then make coal dust intermixture obtain suitable cocnentration factor, can ensure that flameholding is with abundant under low oxygen conditions.The coal dust intermixture be separated through concentration to be ensured uniform stream after upper and lower air-coal separating by the current stabilization effect of homogenizing plate 6, ensure that concentrated phase First air catches fire in advance.Two to four layers of bluff body 8 that coal dust intermixture is installed additional by burner nozzle 7 can ensure high temperature gases recirculating, make flameholding, and uniform stream after the upper and lower air-coal separating of further guarantee, because coal powder density is high in thick coal culm air-flow, in reducing atmosphere, generate NO
xfew, and reduction becomes N
2.The spout being biased overfire air port 9 by spout is outward biased being mixed in time of Secondary Air outward, both ensure that coal dust efficient burning, spout is made to be biased Secondary Air outward in back-fire side (water-cooling wall side because spout is biased overfire air port 9 outward again, namely the right side in schematic diagram is supposed) and be 1.6 ~ 2.6 to the ratio of fiery side (namely supposing the left side in schematic diagram), ensure water-cooling wall side oxidizing atmosphere, prevent slagging scorification and high temperature corrosion.
Claims (6)
1. the coal powder burner of bluff body air-coal separating more than a kind, by burner inlet elbow, fixedly separated link stopper, burner inlet circumference joint, pulverized coal concentrator, adjustable link stopper, homogenizing plate, burner nozzle, bluff body, spout is biased overfire air port outward, flange, turning cylinder, burner inlet elbow lower shell, burner inlet elbow upper shell is formed, it is characterized in that: the burner inlet elbow lower shell in described burner inlet elbow, burner inlet elbow upper shell is provided with described fixedly separated link stopper I, space between described burner inlet elbow lower shell and burner inlet elbow upper shell is provided with fixedly separated link stopper II, described pulverized coal concentrator front is provided with fixedly separated link stopper III.
2. one many bluff bodies air-coal separating coal powder burner according to claim 1, it is characterized in that: described fixedly separated link stopper I, fixedly separated link stopper II, fixedly separated link stopper III gradient α 1, α 2, α 3 are 5 ° ~ 45 °, described adjustable stops and horizontal gradient angle β are 15 ° ~ 45 °, control breeze airflow cocnentration factor.
3. one many bluff bodies air-coal separating coal powder burner according to claim 1, is characterized in that: described homogenizing plate length-width ratio is 0.5 ~ 4.0, and homogenizing plate two draft angle γ 1 are 25 ° ~ 65 °, γ 2 is 110 ° ~ 160 °.
4. one many bluff bodies air-coal separating coal powder burner according to claim 1, it is characterized in that: the length-width ratio of described bluff body is 1.0 ~ 4.0, bluff body draft angle δ is 10 ° ~ 60 °.
5. one many bluff bodies air-coal separating coal powder burner according to claim 1, it is characterized in that: described fixedly separated link stopper I, fixedly separated link stopper II, fixedly separated link stopper III chamfer length L1, L2, L3 length is respectively 30 ~ 200mm, described fixedly separated link stopper I is 50 ~ 200mm apart from combustor elbow entrance length T4, described fixedly separated link stopper II horizontal range is 50-450mm apart from the horizontal range S1 of fixedly separated link stopper I, vertical range T1 is 50-500mm, described fixedly separated link stopper III horizontal range is 50-600mm apart from the horizontal range S2 of fixedly separated link stopper I, vertical range T2 is 50-700mm, horizontal range S4 between fixedly separated link stopper III and pulverized coal concentrator is 50-400mm, adjustable stops is 150 ~ 800mm apart from the horizontal range S3 of the fixedly separated block I of entrance first, vertical range T3 is 100 ~ 500mm, adjustable stops 5 and the one-sided space L4 of pulverized coal concentrator are 3 ~ 5mm, homogenizing plate and burner nozzle head distance S5 are 350 ~ 600mm.
6. one many bluff bodies air-coal separating coal powder burner according to claim 1, is characterized in that: described burner nozzle is provided with two to four layers of horizontally disposed bluff body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520201125.0U CN204574022U (en) | 2015-04-04 | 2015-04-04 | Many bluff bodies air-coal separating coal powder burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520201125.0U CN204574022U (en) | 2015-04-04 | 2015-04-04 | Many bluff bodies air-coal separating coal powder burner |
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| CN204574022U true CN204574022U (en) | 2015-08-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167825A (en) * | 2017-12-26 | 2018-06-15 | 哈尔滨锅炉厂有限责任公司 | A kind of DC burner for low volatile carbon-based fuel |
| CN113280332A (en) * | 2021-04-09 | 2021-08-20 | 西安热工研究院有限公司 | Direct-current stable-combustion burner system based on radial concentration of pulverized coal |
| CN113669723A (en) * | 2021-08-18 | 2021-11-19 | 哈尔滨锅炉厂有限责任公司 | Powder homogenizing device for eliminating powder deviation effect of coal powder pipeline elbow |
-
2015
- 2015-04-04 CN CN201520201125.0U patent/CN204574022U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167825A (en) * | 2017-12-26 | 2018-06-15 | 哈尔滨锅炉厂有限责任公司 | A kind of DC burner for low volatile carbon-based fuel |
| CN113280332A (en) * | 2021-04-09 | 2021-08-20 | 西安热工研究院有限公司 | Direct-current stable-combustion burner system based on radial concentration of pulverized coal |
| CN113669723A (en) * | 2021-08-18 | 2021-11-19 | 哈尔滨锅炉厂有限责任公司 | Powder homogenizing device for eliminating powder deviation effect of coal powder pipeline elbow |
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