CN220103122U - Swirl burner arranged in non-vertical mode - Google Patents
Swirl burner arranged in non-vertical mode Download PDFInfo
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- CN220103122U CN220103122U CN202320327077.4U CN202320327077U CN220103122U CN 220103122 U CN220103122 U CN 220103122U CN 202320327077 U CN202320327077 U CN 202320327077U CN 220103122 U CN220103122 U CN 220103122U
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- secondary air
- air cylinder
- water
- central
- flaring
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- 238000000034 method Methods 0.000 claims description 3
- 230000001154 acute effect Effects 0.000 claims description 2
- 239000002817 coal dust Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 14
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 16
- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 238000009827 uniform distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Abstract
The utility model discloses a cyclone burner which is arranged in a non-vertical mode, comprising a sealing cover shell, a central air pipe, a primary air cylinder, an inner secondary air cylinder and an outer secondary air cylinder, wherein a water-cooled wall flaring is arranged in the sealing cover shell; the included angle between the inner secondary air expander and the central line of the central air pipe and the included angle between the flaring of the water-cooled wall and the central line of the central air pipe are beta; the included angle between the primary air expansion cone and the central line of the central air pipe is gamma; the inner diameter of the outer secondary air cylinder is equal to the outer diameter of the inner secondary air cylinder in the circumferential direction, and the distance between the flaring of the water-cooled wall and the circumferential direction of the inner secondary air cone is equal to the distance between the flaring of the water-cooled wall and the circumferential direction of the inner secondary air cone. The utility model can realize that pulverized coal airflow is sprayed into the furnace far away from the side wall water-cooled wall, ensure that the amount of the burner Zhou Xiangfeng is distributed uniformly and ensure the normal operation of the burner.
Description
Technical Field
The utility model relates to a cyclone burner, in particular to a non-vertically arranged cyclone burner for a pulverized coal boiler.
Background
The main reason why the pulverized coal boiler generates high-temperature corrosion is that after the pulverized coal particles in the hearth come out of the burner nozzle, the pulverized coal particles are diffused and flow around except the vertical upward flow, the airflow diffused and flowing around can cause the pulverized coal particles to collide with the water cooling wall, the pulverized coal particles containing sulfur are enriched in the area close to the wall because of the collision with the wall surface and the retention characteristic of the pulverized coal particles, the concentration of the pulverized coal particles further reacts to reduce the oxygen content of the side wall area, a reducing atmosphere is generated, and the high-temperature corrosion of the water cooling wall pipe occurs.
In order to alleviate the high-temperature corrosion of the water-cooled wall, as shown in fig. 1, a method for obliquely installing the burner 22 close to the side wall according to a certain angle alpha is proposed in the industry, so that the situation that pulverized coal particles flow to two side walls in a hearth can be weakened to a certain extent, and the effect of alleviating the high-temperature corrosion of the water-cooled wall 21 of the side wall is achieved; however, when the scheme is adopted in some implementation projects at present, the originally designed burner 22 which is vertically arranged with the water-cooled wall is simply inclined at a certain angle and then is arranged at the opening of the water-cooled wall 23 of the boiler, so that only the angle of the wind and powder air flow of the burner is inclined, the phenomenon of uneven left and right distribution of the air of the burner in the circumferential direction can occur, the size N of the outer secondary air circulation outlet of the burner, which is close to one side of the side wall water-cooled wall 21, is obviously larger than the size M of the outer secondary air circulation outlet, which is far away from one side of the side wall water-cooled wall 21, and the uneven distribution of the wind quantity at the left and right sides of a single burner is caused, so that the normal operation of the burner is not facilitated.
Disclosure of Invention
The utility model aims at overcoming the defects in the prior art, and provides a cyclone burner which is arranged in a non-vertical mode, so that pulverized coal airflow is sprayed into a furnace far away from a side wall water-cooling wall, high-temperature corrosion of the side wall water-cooling wall is relieved, uniform distribution of the amount of the burner Zhou Xiangfeng is ensured, and normal operation of the burner is ensured.
In order to achieve the purpose, the cyclone burner which is arranged in a non-vertical mode comprises a sealing cover shell, a central air pipe, a primary air cylinder, an inner secondary air cylinder and an outer secondary air cylinder, wherein the central air pipe, the primary air cylinder, the inner secondary air cylinder and the outer secondary air cylinder are arranged in sequence from inside to outside; the method is characterized in that: the included angle between the inner secondary air expander and the central line of the central air pipe is beta, and the included angle between the flaring of the water-cooled wall and the central line of the central air pipe is also beta; the included angle between the primary air expansion cone and the central line of the central air pipe is gamma, and alpha, beta and gamma are acute angles; the inner diameter of the outer secondary air cylinder is equal to the outer diameter of the inner secondary air cylinder in the circumferential direction, and the inner diameter of the outer secondary air cylinder is equal to the outer diameter of the inner secondary air cylinder in the circumferential direction; the space between the flaring of the water-cooled wall and the internal secondary air flaring in the circumferential direction is equal, and the flaring and the internal secondary air flaring are both of a size H.
When the burner is used, the burner is arranged on the front wall and the rear wall of the hearth, which are close to the side wall, the central line of the sealing cover shell is vertical to the front wall and the rear wall, the included angle between the central line of the central air pipe and the like (namely the central line of the burner) and the vertical line of the water-cooling wall of the front wall and the rear wall is alpha, so that pulverized coal airflow is far away from the water-cooling wall of the side wall and is sprayed into the furnace, high-temperature corrosion of the water-cooling wall of the side wall is relieved, and simultaneously, the inner secondary air expander, the water-cooling wall flaring and the primary air expander are all arranged in a concentric ring around the central line of the central air pipe, and the interval between the inner diameter of the outer secondary air cylinder and the outer diameter of the inner secondary air cylinder in the circumferential direction and the interval between the water-cooling wall flaring and the inner secondary air expander in the circumferential direction are equal, so that uniform distribution of the burner Zhou Xiangfeng can be ensured, and normal operation of the burner can be ensured;
as a further development of the utility model, the α=3-8°, β=10-35°, γ=10-30°; the proper nozzle angle can improve the combustion effect;
as a further improvement of the utility model, the inner diameter extension line of the outer secondary air cylinder is aligned with the inner wall of the perforated elbow of the water-cooled wall at the outermost layer; the outer secondary air can be prevented from blowing the water-cooled wall perforated bent pipe, and the service life is prolonged;
as a further improvement of the utility model, the outer end part of the inner secondary air expansion cone, which is far away from one side of the side wall water wall, is aligned with the central line of the perforated elbow pipe of the outermost water wall; the device can be used as a positioning reference of the water-cooled wall perforated bent pipe, and the distance A between the inner diameter of the outer secondary air cylinder and the outer diameter of the inner secondary air cylinder in the circumferential direction is easy to ensure to be equal;
in conclusion, the pulverized coal gas flow can be sprayed into the furnace far away from the side wall water-cooling wall, high-temperature corrosion of the side wall water-cooling wall is relieved, uniform distribution of the amount of the burner Zhou Xiangfeng can be ensured, and normal operation of the burner is ensured.
Drawings
Fig. 1 is a structural view of a conventional burner close to a side wall installed obliquely at a certain angle α.
Fig. 2 is a front view of an embodiment of the present utility model.
Fig. 3 is a front view of the waterwall flare of fig. 2.
Fig. 4 is a cross-sectional view A-A of fig. 3.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
As shown in fig. 2 to 3, a cyclone burner arranged in a non-vertical manner in this embodiment includes a sealed housing 1, a central air duct 2, a primary air duct 3, an inner secondary air duct 4 and an outer secondary air duct 5 which are concentric and sequentially arranged from inside to outside, wherein a water-cooled wall flaring 6 formed by seven layers of water-cooled wall perforated elbows is arranged in the sealed housing 1, a coal dust concentrator 7 is arranged in the primary air duct 3, a primary air expansion cone 8 is arranged at the inner end of the primary air duct 3, an inner secondary air cyclone 9 is arranged in the inner secondary air duct 4, an inner secondary air expansion cone 10 is arranged at the inner end of the inner secondary air duct 4, an outer secondary air cyclone 11 is arranged in the outer secondary air duct 5, and an included angle between the central line of the sealed housing 1 and the central line of the central air duct 2 is α, α=3-8 °; the included angle between the inner secondary air expander 10 and the central line of the central air pipe 2 is beta, and the included angle between the water wall flaring 6 and the central line of the central air pipe 2 is also beta, wherein beta=10-35 degrees; the included angle between the primary air expansion cone 8 and the central line of the central air pipe 2 is gamma, and gamma=10-30 degrees; the inner diameter of the outer secondary air cylinder 5 is equal to the outer diameter of the inner secondary air cylinder 4 in the circumferential direction, and the inner diameter and the outer diameter are both the dimension A; the space between the water wall flaring 6 and the inner secondary air flaring 10 in the circumferential direction is equal, and the space is the dimension H; the inner diameter extension line of the outer secondary air cylinder 5 is aligned with the inner wall of the perforated elbow 12 of the water-cooled wall of the outermost layer of the water-cooled wall flaring 6; the outer end part of the inner secondary air expander 10, which is far away from one side of the side wall water wall 21, is aligned with the central line of the perforated elbow 12 of the outermost water wall of the water wall flaring 6;
when the burner is used, the burner is arranged on the front wall and the rear wall of a hearth, which are close to the side wall, the central line of the sealing housing 1 is vertical to the front wall and the rear wall, the central line of the central air pipe 2 and the like (namely the central line of the burner) and the vertical line of the front wall water-cooling wall 19 are also alpha, so that pulverized coal airflow is sprayed into the furnace far from the side wall water-cooling wall 21, high-temperature corrosion of the side wall water-cooling wall is relieved, meanwhile, the inner secondary air expander 10, the water-cooling wall expanding mouth 6 and the primary air expander 8 are all arranged in concentric rings around the central line of the central air pipe 2, the included angles of the inner secondary air expander and the central line of the central air pipe 2 are respectively beta and gamma, and the interval A between the inner diameter of the outer secondary air pipe and the outer diameter of the inner secondary air pipe in the circumferential direction, the interval H between the water-cooling wall expanding mouth and the inner secondary air expander in the circumferential direction are equal, and the like, and the uniform distribution of the burner Zhou Xiangfeng can be ensured, and the normal operation of the burner is ensured;
the combustion effect can be improved by adopting proper nozzle angles of the inner secondary air expander 10, the water-cooled wall flaring 6 and the primary air expander 8;
the inner diameter extension line of the outer secondary air cylinder 5 is aligned with the inner wall of the perforated elbow 12 of the water-cooled wall of the outermost layer of the water-cooled wall flaring 6, so that the outer secondary air can be prevented from blowing each perforated elbow of the water-cooled wall, and the service life of the perforated elbow of the water-cooled wall can be prolonged; the outer end part of the inner secondary air expander 10, which is far away from the side wall water-cooled wall 21, is aligned with the central line of the outer water-cooled wall perforated bent pipe 12 of the water-cooled wall flaring 6, and can be used as a positioning reference of the water-cooled wall perforated bent pipe, so that the interval A between the inner diameter of the outer secondary air cylinder and the outer diameter of the inner secondary air cylinder in the circumferential direction is easy to ensure to be equal.
According to the design and the structure of the cyclone burner for mechanical water-cooled wall high-temperature corrosion treatment, only the design structure of the burner is optimally adjusted, and under the condition that no additional cost is added, according to analysis and research, the concentration of pulverized coal particles on a side wall can be reduced by more than 25%, and the problem of water-cooled wall high-temperature corrosion can be effectively prevented and treated.
Claims (4)
1. The swirl burner comprises a sealed housing, a central air pipe, a primary air cylinder, an inner secondary air cylinder and an outer secondary air cylinder, wherein the central air pipe, the primary air cylinder, the inner secondary air cylinder and the outer secondary air cylinder are arranged in sequence from inside to outside, a water-cooled wall flaring formed by a plurality of layers of water-cooled wall perforated elbows is arranged in the sealed housing, a coal dust concentrator is arranged in the primary air cylinder, a primary air expansion cone is arranged at the inner end of the primary air cylinder, an inner secondary air cyclone is arranged in the inner secondary air cylinder, an inner secondary air expansion cone is arranged at the inner end of the inner secondary air cylinder, an outer secondary air cyclone is arranged in the outer secondary air cylinder, and the included angle between the central line of the sealed housing and the central air pipe is alpha; the method is characterized in that: the included angle between the inner secondary air expander and the central line of the central air pipe is beta, and the included angle between the flaring of the water-cooled wall and the central line of the central air pipe is also beta; the included angle between the primary air expansion cone and the central line of the central air pipe is gamma, and alpha, beta and gamma are acute angles; the inner diameter of the outer secondary air cylinder is equal to the outer diameter of the inner secondary air cylinder in the circumferential direction, and the inner diameter of the outer secondary air cylinder is equal to the outer diameter of the inner secondary air cylinder in the circumferential direction; the space between the flaring of the water-cooled wall and the internal secondary air flaring in the circumferential direction is equal, and the flaring and the internal secondary air flaring are both of a size H.
2. A non-vertically arranged cyclone burner as claimed in claim 1, wherein: the α=3-8 °, β=10-35 °, γ=10-30 °.
3. A non-vertically arranged swirl burner as in claim 1 or 2, characterized in that: and the inner diameter extension line of the outer secondary air cylinder is aligned with the inner wall of the perforated elbow of the water-cooled wall at the outermost layer.
4. A non-vertically arranged cyclone burner as claimed in claim 3, wherein: and the outer end part of one side of the inner secondary air expander, which is far away from the side wall water-cooled wall, is aligned with the central line of the perforated elbow pipe of the outermost water-cooled wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320327077.4U CN220103122U (en) | 2023-02-27 | 2023-02-27 | Swirl burner arranged in non-vertical mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320327077.4U CN220103122U (en) | 2023-02-27 | 2023-02-27 | Swirl burner arranged in non-vertical mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220103122U true CN220103122U (en) | 2023-11-28 |
Family
ID=88868523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320327077.4U Active CN220103122U (en) | 2023-02-27 | 2023-02-27 | Swirl burner arranged in non-vertical mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220103122U (en) |
-
2023
- 2023-02-27 CN CN202320327077.4U patent/CN220103122U/en active Active
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