CN203131814U - Adjustable bluff body combustor - Google Patents
Adjustable bluff body combustor Download PDFInfo
- Publication number
- CN203131814U CN203131814U CN 201320055445 CN201320055445U CN203131814U CN 203131814 U CN203131814 U CN 203131814U CN 201320055445 CN201320055445 CN 201320055445 CN 201320055445 U CN201320055445 U CN 201320055445U CN 203131814 U CN203131814 U CN 203131814U
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- China
- Prior art keywords
- bluff body
- adjustable
- airduct
- combustion
- wall surface
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003245 coal Substances 0.000 abstract description 20
- 238000002485 combustion reaction Methods 0.000 abstract description 19
- 239000000446 fuel Substances 0.000 abstract description 17
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000004939 coking Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000003500 flue dust Substances 0.000 abstract description 3
- 230000003111 delayed effect Effects 0.000 abstract 1
- 230000003134 recirculating effect Effects 0.000 description 7
- 238000010992 reflux Methods 0.000 description 6
- 239000002817 coal dust Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 3
- 239000003830 anthracite Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000037237 body shape Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
Images
Abstract
The utility model discloses an adjustable bluff body combustor, and belongs to the technical field of pulverized coal combustion. The adjustable bluff body combustor comprises a primary air pipe, a flowing expanding pipe, a bluff body and an adjustable baffle, wherein the adjustable baffle can be respectively adjusted to three typical positions so that the intensity of air flow at the lower side of the bluff body can be changed, and the length of a back flow area of the bluff body can be further changed. The adjustable baffle changes the direction of main air flow, so that the concentration of fuel at the upper side and the lower side of the bluff body is changed, and a unsymmetrical strong and thick two-phase combustion mode is formed, namely the advantage of stable combustion of the back flow area and the advantage of easy ignition of the strong and weak combustion technology of the bluff body combustor are organically combined. The adjustable bluff body combustor has the advantages that efficient and stable combustion of fault coal is achieved while low unburned carbon in flue dust is kept, and when high calorific value fuel is combusted, an ignition point is delayed, a flame kernel moves backwards, and coking is effectively prevented. The adjustable bluff body combustor is suitable for power station boilers and various types of industrial furnaces and power station pulverized coal furnaces, and is suitable for various types of fuel regarding fuel variety.
Description
Technical field
The utility model belongs to a kind of burner on the coal-dust combustion device, relates to high temperature gases recirculating technology and coal powder light-dark segregated combustion technology, belongs to coal powder burning technology field.
Background technology
At present, the stable combustion technology of breeze airflow flame mainly is divided into two major types, i.e. high temperature gases recirculating stable combustion type and pulverized coal bias combustion type in the stove.High temperature gases recirculating surely fires, and has mainly utilized the steady combustion characteristic of recirculating zone, when a general mood stream flows through bluff body, produced eddy current in the bluff body back, formed the high temperature gases recirculating district, heated firing coal-dust airflow, reached breeze airflow and caught fire in advance and combustion stablized purpose.Deep or light segregated combustion is after wind of main flow passes through dense-and-weak separator, to form wind of dense and light both sides main flow, and wherein dense side a wind is conducive to catch fire and burn near flame.
Existing bluff body burner, by the expansion stream pipe that links with airduct, being positioned at the bluff body that expands the stream pipe forms, as the patent of invention ZN86106374 of the Central China University of Science and Technology " a kind of coal burner ", forming the recirculating zone at the bluff body rear of coming flow path direction, thereby strengthen burning, after this, some technology is improved bluff body shape or internal structure again.But these bluff body burner coal adaptabilities and load adaptability are still not enough, and the steady flame ability of underload is still powerful inadequately, during coals such as burning anthracite, are difficult to satisfy the requirement of current underload peak regulation.Simultaneously, the structure of these bluff body burners is fixed, and only at specific operating mode, coking problem appearred in high load capacity easily when underload was realized steady flame.
Summary of the invention
In order to overcome the deficiency of existing bluff body burner coal adaptability and load adaptability, novel a kind of adjustable bluff body burner that provides is provided for this, and this burner can not only be realized the burning of colm efficient stable, and can also prevent coking when using fat coal.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of adjustable bluff body burner, comprise: pipe, bluff body are flowed in airduct, an expansion, a described airduct is connected with described expansion stream pipe, and described bluff body is fixedly mounted in the described airduct; It is characterized in that: described adjustable bluff body burner also comprises fender plate, and described adjustable baffle plate is movably arranged on the lower wall surface of a described airduct, be positioned at described bluff body the place ahead.
As preferably, described bluff body is centered close on the axis of a described airduct.
As preferably, described bluff body is tri-prismoid.
As preferably, the bottom surface of described bluff body is positioned at a described airduct and described expansion stream pipe junction, and two sides are fixedly mounted on airduct interior sidewall surface.
As preferably, described fender plate one end is rotatably installed on the described airduct lower wall surface by rotating shaft.
As preferably, the length of described fender plate equates that with the distance that rotating shaft is put foremost to bluff body width equates with an airduct lower inner wall face length degree.
As preferably, angle α=0 of described fender plate and a described airduct lower wall surface °-47.25 °.
As preferably, angle α=0 of described fender plate and a described airduct lower wall surface °.
As preferably, angle α=25 of described fender plate and a described airduct lower wall surface °.
As preferably, angle α=45 of described fender plate and a described airduct lower wall surface °.
The beneficial effect that the utility model compared with prior art has is: realize the burning of colm efficient stable, the coals inferior such as meager coal, mud coal of can burning keep lower unburned carbon in flue dust simultaneously; When using exotic fuels, ignition point postpones, and moves behind the flame kernel, effectively prevents coking; Applied widely to the boiler unit simultaneously, be applicable to station boiler and various types of industrial furnace; Be applied to pulverized coal furnace of hydropower station, aspect the peak load regulation network requirement, good application prospects arranged; From fuel type, be applicable to various fuel: fuel oil, combustion gas, coal dust (bituminous coal, anthracite, meager coal, brown coal, coal slime, gangue etc.).
Description of drawings
Fig. 1: vertical section schematic diagram of the present utility model.
Fig. 2: rearview of the present utility model.
Fig. 3: among the utility model embodiment when α=2.5 ± 2.5 ° air-flow distribution map in the burner.
Fig. 4: among the utility model embodiment when α=22.5 ± 2.5 ° air-flow distribution map in the burner.
Fig. 5: among the utility model embodiment when α=45 ± 2.5 ° air-flow distribution map in the burner.
Among the figure: 1. airduct, 2. expand the stream pipe, 3. bluff body, 4. fender plate.
The specific embodiment
Below in conjunction with further describing the technical program with reference to the accompanying drawings, the example of described embodiment is shown in the drawings, wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish, only be used for explaining the utility model but should describe, and can not be interpreted as restriction of the present utility model.
Ask for an interview Fig. 1 and Fig. 2, a kind of adjustable bluff body burner described in the utility model comprises: pipe 2, bluff body 3, fender plate 4 are flowed in airduct 1, an expansion; One time airduct 1 is connected with expansion stream pipe 2, bluff body 3 is tri-prismoid, be positioned at airduct 1 inner outlet place one time, the bottom surface of bluff body 3 is positioned at an airduct 1 and manages 2 junctions with expansion stream, the two sides of bluff body 3 are fixedly mounted on described airduct 1 interior sidewall surface, bluff body 3 is centered close on the axis of an airduct 1, adjustable baffle plate 4 is rotatably installed on the lower wall surface of an airduct 1 by rotating shaft, be positioned at bluff body 3 the place aheads, the length of baffle plate 4 equates to bluff body 3 distance foremost with rotating shaft, width equates with a described airduct 1 lower inner wall face length degree, angle α=0 of fender plate 4 and airduct 1 lower wall surface °-47.25 °.
Fender plate 4 can transfer to three exemplary position respectively, be that the angle α of Adjustable device plate 4 and airduct 1 lower wall surface can get α=2.5 ± 2.5 °, α=22.5 ± 2.5 °, α=45 ± 2.5 ° respectively, thereby can change bluff body 3 downside current rates, and then change bluff body 3 reflux area lengths.Fender plate 4 has changed the primary air direction, thereby bluff body 3 upper and lower sides fuel concentrations have been changed, form asymmetrical deep or light two phase combustion mode, the advantage that the advantage of the steady combustion in bluff body 3 burner recirculating zones soon and dense-dilute burner combustion technology are easy to catch fire organically combines.
Ask for an interview Fig. 3, fender plate 4 is in position a, and with angle α=2.5 ± 2.5 of an airduct lower wall surface °, reflux area length is the longest, moves behind the ignition point, and be suitable for the stove internal combustion under exotic fuels or the high load capacity this moment, can effectively prevent coking phenomenon.
Ask for an interview Fig. 4, fender plate 4 is in position b, fender plate 4 between bluff body 3 front ends and airduct lower wall surface, angle α=22.5 ± 2.5 °, this moment, reflux area length was short slightly, and use under conventional fuel and the normal duty and can obtain good combustion stability this moment.
Ask for an interview Fig. 5, fender plate 4 is in position c, fender plate 4 ends are in bluff body 3 front ends, with airduct lower wall surface folder α=45 ± 2.5 °, this moment fender plate 4 and an airduct lower wall surface the angle maximum, reflux area length is the shortest, and steady flame effect is best, uses to move under low calorie fuels or the underload still can keep good flame holding.
Bluff body 3 reflux area lengths are changed, and the rate of heat addition that refluxes to fuel changes, thereby make and when using low calorie fuels ignition point is shifted to an earlier date, and guarantee smooth combustion; When using exotic fuels, ignition point postpones, and moves behind the flame kernel, effectively prevents coking.Burner is to poor quality, and the right material of high-quality is all available, and applicability strengthens greatly.
The beneficial effect that the utility model compared with prior art has is: realize the burning of colm efficient stable, the coals inferior such as meager coal, mud coal of can burning keep lower unburned carbon in flue dust simultaneously; When using exotic fuels, ignition point postpones, and moves behind the flame kernel, effectively prevents coking; Applied widely to the boiler unit simultaneously, be applicable to station boiler and various types of industrial furnace; Be applied to pulverized coal furnace of hydropower station, aspect the peak load regulation network requirement, good application prospects arranged; From fuel type, be applicable to various fuel: fuel oil, combustion gas, coal dust bituminous coal, anthracite, meager coal, brown coal, coal slime, gangue etc.
It below only is preferred embodiment of the present utility model; be not for limiting protection domain of the present utility model; therefore, all any modifications of within spirit of the present utility model and principle, doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. adjustable bluff body burner, comprise: an airduct (1), expansion stream pipe (2), bluff body (3), a described airduct (1) is connected with described expansion stream pipe (2), described bluff body (3) is fixedly mounted in the described airduct (1), it is characterized in that: described adjustable bluff body burner also comprises fender plate (4), and described adjustable baffle plate (4) is movably arranged on the lower wall surface of a described airduct (1), be positioned at described bluff body (3) the place ahead.
2. adjustable bluff body burner according to claim 1, it is characterized in that: described bluff body (3) is centered close on the axis of a described airduct (1).
3. adjustable bluff body burner according to claim 1 and 2, it is characterized in that: described bluff body (3) is tri-prismoid.
4. adjustable bluff body burner according to claim 3, it is characterized in that: the bottom surface of described bluff body (3) is positioned at a described airduct (1) and described expansion stream pipe (2) junction, and the two sides of described bluff body (3) are fixedly mounted on a described airduct (1) internal face.
5. adjustable bluff body burner according to claim 1, it is characterized in that: described fender plate (4) one ends are rotatably installed on a described airduct (1) lower wall surface by rotating shaft.
6. adjustable bluff body burner according to claim 1, it is characterized in that: the length of described fender plate (4) equates to bluff body (3) distance foremost that with rotating shaft width equates with a described airduct (1) lower inner wall face length degree.
7. adjustable bluff body burner according to claim 1 is characterized in that: angle α=0 of described fender plate (4) and a described airduct (1) lower wall surface °-47.25 °.
8. adjustable bluff body burner according to claim 1 is characterized in that: angle α=0 of described fender plate (4) and a described airduct (1) lower wall surface °.
9. adjustable bluff body burner according to claim 1 is characterized in that: angle α=25 of described fender plate (4) and a described airduct (1) lower wall surface °.
10. adjustable bluff body burner according to claim 1 is characterized in that: angle α=45 of described fender plate (4) and a described airduct (1) lower wall surface °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055445 CN203131814U (en) | 2013-01-31 | 2013-01-31 | Adjustable bluff body combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055445 CN203131814U (en) | 2013-01-31 | 2013-01-31 | Adjustable bluff body combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203131814U true CN203131814U (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320055445 Expired - Fee Related CN203131814U (en) | 2013-01-31 | 2013-01-31 | Adjustable bluff body combustor |
Country Status (1)
| Country | Link |
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| CN (1) | CN203131814U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832916A (en) * | 2014-02-10 | 2015-08-12 | 四川川锅锅炉有限责任公司 | Pulverized coal burner nozzle with adjustable blunt body |
| CN113701191A (en) * | 2021-09-01 | 2021-11-26 | 南昌航空大学 | Staggered flow guide middle seam type V-shaped flame stabilizer |
| CN116293787A (en) * | 2023-04-27 | 2023-06-23 | 上海交通大学 | Combustion device combining plasma and blunt body to stabilize flame |
-
2013
- 2013-01-31 CN CN 201320055445 patent/CN203131814U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832916A (en) * | 2014-02-10 | 2015-08-12 | 四川川锅锅炉有限责任公司 | Pulverized coal burner nozzle with adjustable blunt body |
| CN113701191A (en) * | 2021-09-01 | 2021-11-26 | 南昌航空大学 | Staggered flow guide middle seam type V-shaped flame stabilizer |
| CN113701191B (en) * | 2021-09-01 | 2022-06-24 | 南昌航空大学 | A V-shaped flame stabilizer with staggered diversion and slits |
| CN116293787A (en) * | 2023-04-27 | 2023-06-23 | 上海交通大学 | Combustion device combining plasma and blunt body to stabilize flame |
| CN116293787B (en) * | 2023-04-27 | 2024-05-03 | 上海交通大学 | A combustion device combining plasma and blunt body stable flame |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20160131 |
|
| EXPY | Termination of patent right or utility model |