CN111853761A - Four-duct pulverized coal burner - Google Patents
Four-duct pulverized coal burner Download PDFInfo
- Publication number
- CN111853761A CN111853761A CN202010768339.1A CN202010768339A CN111853761A CN 111853761 A CN111853761 A CN 111853761A CN 202010768339 A CN202010768339 A CN 202010768339A CN 111853761 A CN111853761 A CN 111853761A
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- Prior art keywords
- pipe
- air
- cyclone
- adjusting
- air pipe
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- 239000003245 coal Substances 0.000 title claims abstract description 49
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 20
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to the field of burners, in particular to a four-air-channel pulverized coal burner which comprises a central tube, an adjusting air pipe, a cyclone pipe, a coal air pipe, an outer air pipe and an adjuster.
Description
Technical Field
The invention relates to the field of burners, in particular to a four-air-channel pulverized coal burner.
Background
A pulverized coal burner refers to a device which can make pulverized coal fully burn in a short time and generate high-temperature eddy current. The pulverized coal burner has a specially designed multi-stage multi-nozzle air supply guide structure, can generate high-temperature vortex for pulverized coal in a short time, has the advantages of complete combustion, high heat utilization rate, smoke prevention and dust removal, high efficiency, energy conservation, improvement on working conditions, reduction of labor intensity and the like, and is an ideal product with energy conservation and environmental protection. The high-efficiency pulverized coal combustion technology and the low NOx combustion technology are two contradictory technologies. The generation and discharge of NOx are reduced by controlling the temperature of a combustion area not to be too high, but the low-temperature combustion influences the combustion rate of pulverized coal, the application of the two technologies is well coordinated so as to achieve the purpose of achieving the comprehensive optimal effect, the whole process of pulverized coal combustion is actually required to be controlled, and the length and the thickness of flame can be adjusted to achieve the ideal combustion effect. Not only can ensure the ignition stability of the pulverized coal, but also has better combustion temperature, and simultaneously has enough combustion length and ensures the burnout at certain temperature.
The invention patent with application number 2015104885668 discloses a pulverized coal burner, wherein high-temperature air generates vortex air flow and rotational flow air at the section of an air outlet through a vortex air channel and a rotational flow air channel with spiral central axes, so as to promote the combustion of pulverized coal.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a four-duct pulverized coal burner.
In order to achieve the purpose, the invention adopts the following technical scheme:
a four-duct pulverized coal burner is characterized in that: the coal air conditioning device comprises a central pipe, an adjusting air pipe, a cyclone pipe, a coal air pipe and an outer air pipe which are sleeved together from inside to outside, wherein an oil gun penetrates through the central pipe, an oil gun channel is formed between the oil gun and the central pipe, a central air channel is formed between the central pipe and the adjusting air pipe, a cyclone channel is formed between the adjusting air pipe and the cyclone pipe, a coal air channel is formed between the cyclone pipe and the coal air pipe, an outer air channel is formed between the coal air pipe and the outer air pipe, the adjusting air pipe and the cyclone pipe are conical at the outlet end, the conical angle is 15-18 degrees, a plurality of arc-shaped air walls 6 are processed on the outer wall of a conical section by laser, the axial length of each air wall 6 is the length of a conical part, the air walls are arc-shaped at the air outlet, the included angle between each arc-shaped angle and the cross section of the air outlet is from 17-60 degrees, and the air walls are straight lines with gradually, the adjusting air pipe can generate axial displacement and circumferential rotation on the central pipe through the adjuster, the cyclone pipe can generate axial displacement and circumferential rotation on the adjusting air pipe through the adjuster, the air walls are of a parallel structure, rifling lines matched with grooves generated by the arc-shaped air walls are processed on the inner wall of the cyclone pipe corresponding to the grooves generated by the arc-shaped air walls of the adjusting air pipe, and the height and the width of the rifling lines are smaller than the depth and the width of the grooves.
Further, the axial length of the conical section is 5 CM-20 CM.
Still further, the height of the air wall is 0.01CM-1 CM, and the distribution of the air wall in the circumferential direction of the adjusting air pipe occupies 25% -100% of the peripheral angle of the adjusting air pipe.
Still further, the regulator comprises a regulating turbine and a lead screw, the regulating turbine is annularly arranged on the driving pipe, and the lead screw is arranged on the loaded driven pipe.
Still further, the height of the rifling is 2mm-15mm smaller than the depth of the wind wall groove.
The four-air-channel pulverized coal burner provided by the invention has the beneficial effects that:
1. the invention can controllably adjust the cyclone angle in the cyclone channel of the burner by matching the heightened arc-shaped air wall on the outer wall of the adjusting air pipe with the rifling on the inner wall of the cyclone pipe, thereby controlling the shape of the stable flame;
2. the arc-shaped air outlet adjustment of the cyclone channel can have the effect of gathering the smoke;
3. the structure of the invention is simple, the wind wall on the outer wall of the cyclone tube can be realized by welding, and the rifling of the inner wall of the air tube can be adjusted by using a customized drill bit;
4. the invention has the advantages that the replacement of the fittings is convenient, and the disassembly and the assembly of the sleeve can be realized through the regulator.
Drawings
Fig. 1 is a schematic structural diagram of a four-duct pulverized coal burner according to the present invention.
FIG. 2 is a partial enlarged view of the air outlet end of the four-duct pulverized coal burner of the present invention.
FIG. 3 is a partial enlarged view of the air outlet end of the adjusting air pipe of the four-duct pulverized coal burner provided by the invention.
FIG. 4 is a partial enlarged view of the air outlet end of the cyclone tube of the four-duct pulverized coal burner of the present invention.
In the figure: 1 central tube, 2 adjusting air pipes, 3 cyclone pipes, 4 coal air pipes, 5 outer air pipes, 6 air walls, 7 adjusters and 8 rifling lines.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to the attached drawings 1-4, a four-duct pulverized coal burner comprises a central tube 1, an adjusting air tube 2, a cyclone tube 3, a coal air tube 4 and an outer air tube 5, wherein an oil gun penetrates through the central tube 1, an oil gun channel is formed between the oil gun and the central tube, a central air channel is formed between the central tube 1 and the adjusting air tube 2, a cyclone channel is formed between the adjusting air tube 2 and the cyclone tube 3, a coal air channel is formed between the cyclone tube 3 and the coal air tube 4, an outer air channel is formed between the coal air tube 4 and the outer air tube 5, the outlet ends of the adjusting air tube 2 and the cyclone tube 3 are conical, the conical angle is 15-18 degrees, a plurality of arc-shaped air walls 6 are welded on the outer wall of the conical section of the adjusting air tube 2, the axial length of each air wall 6 is the length of the conical section, each air wall 6 is arc-shaped at the air outlet position, the included angle between each arc-shaped angle and the cross section of the air outlet, the air wall 6 is a straight line with an included angle of 60 degrees in radian in a non-conical section, the adjusting air pipe 2 can generate axial displacement and circumferential rotation on the central pipe 1 through the adjuster 7, the cyclone pipe 3 can generate axial displacement and circumferential rotation on the adjusting air pipe 2 through the adjuster 7, the air walls are of a parallel structure, rifling 8 matched with grooves generated by the arc-shaped air wall is processed on the inner wall of the cyclone pipe 3 corresponding to the groove generated by the arc-shaped air wall of the adjusting air pipe 2, and the height and the width of the rifling 8 are smaller than the depth and the width of the grooves.
Preferably, the axial length of the conical section is 5 CM-20 CM.
Preferably, the height of the air wall 6 is 0.01CM-1 CM, and the circumferential distribution of the air wall 6 in the adjusting air pipe 2 occupies 25% -100% of the peripheral angle of the adjusting air pipe 2.
Preferably, the regulator 7 comprises a regulating turbine and a lead screw, the regulating turbine is annularly arranged on the driving pipe, and the lead screw is arranged on the loaded driven pipe.
Preferably, the height of the rifling is 2mm-15mm smaller than the depth of the wind wall groove.
In the use process, when the impurity content in the pulverized coal changes, the combustion oxygen demand of the pulverized coal in the flame and the position of the flame generated by combustion also change, and at the moment, the air supply quantity needs to be changed and the angle of the swirling air needs to be adjusted. Firstly, an adjusting air pipe 2 and a cyclone pipe 3 are rotated through an adjuster, the air wall at the end part of the adjusting air pipe 2 and the rifling in the cyclone pipe 3 generate displacement, when the air wall at the end part of the adjusting air pipe 2 is completely exposed in a combustion chamber, the angle between the air in a rotational flow air channel and the pipe orifice of the cyclone pipe 3 supplies air into the combustion chamber at 60 degrees, when the air wall at the end part of the adjusting air pipe 2 is completely hidden in the cyclone pipe 3, the air in the rotational flow air channel and the pipe orifice of the cyclone pipe 3 supply air into the combustion chamber at 17 degrees, a groove is generated between the air walls at the end part of the adjusting air pipe 2, the groove corresponds to the outer convex rifling in the cyclone pipe 3, and the groove and the outer convex rifling change from a half-occlusion.
When the area of the cyclone air channel needs to be increased and further the cyclone air volume needs to be increased, the adjusting air pipe 2 needs to be screwed into the combustion chamber relative to the cyclone pipe 3, the cyclone air volume is increased, the included angle between the air in the cyclone air channel and the pipe orifice of the cyclone pipe 3 is increased, and at the moment, the flame is in the change trend of getting back; when the area of the cyclone air channel needs to be reduced and then the cyclone air volume needs to be reduced, the adjusting air pipe 2 needs to be screwed out of the combustion chamber relative to the cyclone pipe 3, the cyclone air volume is reduced, the included angle between the air in the cyclone air channel and the pipe orifice of the cyclone pipe 3 is reduced, and at the moment, the flame is in an amplified change trend. Meanwhile, because the air outlet of the cyclone tube is inclined inwards and contracted, when the cyclone tube is screwed into the combustion chamber relative to the medium air tube, the area of the coal air channel is reduced, the ejection speed of the coal powder is increased, and the flame is favorably concentrated and gathered; when the cyclone tube moves back towards the combustion chamber relative to the medium air tube, the area of the coal air channel is enlarged, the ejection speed of the coal powder is reduced, and the flame dispersion is facilitated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A four-duct pulverized coal burner is characterized in that: the coal air conditioning device comprises a central pipe, an adjusting air pipe, a cyclone pipe, a coal air pipe and an outer air pipe which are sleeved together from inside to outside, wherein an oil gun penetrates through the central pipe, an oil gun channel is formed between the oil gun and the central pipe, a central air channel is formed between the central pipe and the adjusting air pipe, a cyclone channel is formed between the adjusting air pipe and the cyclone pipe, a coal air channel is formed between the cyclone pipe and the coal air pipe, an outer air channel is formed between the coal air pipe and the outer air pipe, the adjusting air pipe and the cyclone pipe are conical at the outlet end, the conical angle is 15-18 degrees, a plurality of arc-shaped air walls are welded on the outer wall of a conical section of the adjusting air pipe, the axial length of each air wall is the length of the conical part, the air wall is arc-shaped at the air outlet, the included angle between the arc-shaped angle and the cross section of the air outlet is gradually changed from 17 degrees to 60 degrees, the adjusting air pipe can generate axial displacement and circumferential rotation on the central pipe through the adjuster, the cyclone pipe can generate axial displacement and circumferential rotation on the adjusting air pipe through the adjuster, the air walls are of a parallel structure, rifling lines matched with grooves generated by the arc-shaped air walls are processed on the inner wall of the cyclone pipe corresponding to the grooves of the arc-shaped air walls of the adjusting air pipe, and the height and the width of the rifling lines are smaller than the depth and the width of the grooves.
2. The four duct pulverized coal burner of claim 1, wherein: the axial length of the conical section is 5-20 CM.
3. The four duct pulverized coal burner of claim 1, wherein: the height of the air wall is 0.01-1 CM, and the circumferential distribution of the grooves in the adjusting air pipe occupies 25% -100% of the peripheral angle of the adjusting air pipe.
4. The four duct pulverized coal burner of claim 1, wherein: the regulator comprises a regulating turbine and a lead screw, the regulating turbine is annularly arranged on the driving pipe, and the lead screw is arranged on the loaded driven pipe.
5. The four duct pulverized coal burner of claim 1, wherein: the height of the rifling is 2mm-15mm less than the depth of the wind wall groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010768339.1A CN111853761A (en) | 2020-08-03 | 2020-08-03 | Four-duct pulverized coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010768339.1A CN111853761A (en) | 2020-08-03 | 2020-08-03 | Four-duct pulverized coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111853761A true CN111853761A (en) | 2020-10-30 |
Family
ID=72953363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010768339.1A Pending CN111853761A (en) | 2020-08-03 | 2020-08-03 | Four-duct pulverized coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111853761A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834762A1 (en) * | 1988-10-12 | 1990-04-19 | Ruhrgas Ag | High-speed burner |
| US5277578A (en) * | 1992-12-08 | 1994-01-11 | Gaz Metropolitain & Co., Ltd. And Ptnr. | Gas burner having tangential counter-rotation air injectors and axial gas injector tube |
| CN101718433A (en) * | 2010-01-19 | 2010-06-02 | 王福珍 | Novel multi-channel coal powder combustor |
| CN202647746U (en) * | 2012-05-21 | 2013-01-02 | 西安交通大学 | Real-time adjustable novel swirl burner |
| CN106568081A (en) * | 2016-11-03 | 2017-04-19 | 扬州新建水泥技术装备有限公司 | Novel burner |
| CN106885237A (en) * | 2017-02-23 | 2017-06-23 | 河南汇金智能装备有限公司 | Burner |
| CN206504323U (en) * | 2017-02-23 | 2017-09-19 | 河南汇金智能装备有限公司 | Combustor nozzle outer shaft |
| CN206724151U (en) * | 2017-04-27 | 2017-12-08 | 郑州弘扬机械科技有限公司 | A kind of five-duct coal burner |
| CN109059534A (en) * | 2018-06-12 | 2018-12-21 | 湖北锋焰机电科技有限公司 | A kind of adjustable energy-efficient rotary kiln burner |
-
2020
- 2020-08-03 CN CN202010768339.1A patent/CN111853761A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834762A1 (en) * | 1988-10-12 | 1990-04-19 | Ruhrgas Ag | High-speed burner |
| US5277578A (en) * | 1992-12-08 | 1994-01-11 | Gaz Metropolitain & Co., Ltd. And Ptnr. | Gas burner having tangential counter-rotation air injectors and axial gas injector tube |
| CN101718433A (en) * | 2010-01-19 | 2010-06-02 | 王福珍 | Novel multi-channel coal powder combustor |
| CN202647746U (en) * | 2012-05-21 | 2013-01-02 | 西安交通大学 | Real-time adjustable novel swirl burner |
| CN106568081A (en) * | 2016-11-03 | 2017-04-19 | 扬州新建水泥技术装备有限公司 | Novel burner |
| CN106885237A (en) * | 2017-02-23 | 2017-06-23 | 河南汇金智能装备有限公司 | Burner |
| CN206504323U (en) * | 2017-02-23 | 2017-09-19 | 河南汇金智能装备有限公司 | Combustor nozzle outer shaft |
| CN206724151U (en) * | 2017-04-27 | 2017-12-08 | 郑州弘扬机械科技有限公司 | A kind of five-duct coal burner |
| CN109059534A (en) * | 2018-06-12 | 2018-12-21 | 湖北锋焰机电科技有限公司 | A kind of adjustable energy-efficient rotary kiln burner |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201030 |
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