CN102434877B - Micro oil mass ignition gradual combustor - Google Patents
Micro oil mass ignition gradual combustor Download PDFInfo
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- CN102434877B CN102434877B CN201110442989.8A CN201110442989A CN102434877B CN 102434877 B CN102434877 B CN 102434877B CN 201110442989 A CN201110442989 A CN 201110442989A CN 102434877 B CN102434877 B CN 102434877B
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Abstract
The invention provides a micro oil mass ignition gradual combustor, which comprises a micro oil mass ignition device and a combustor, wherein a coal powder air stream guide blade group is arranged in the combustor, and at least comprises two guide blades; and the guide blades are arranged annularly at certain intervals by taking the central line of the combustor as an axis. In the technical scheme, the coal powder air stream guide blade group is arranged in the combustor and can be used for grading primary air coal powder air stream, blades in the guide blade group are arranged at intervals, and coal powder air stream can flow through the intervals among the blades, so that blending of ignited coal powder and non-ignited coal powder inside the combustor is strengthened, reflow and entrainment of high-temperature flue gas are strengthened, more coal powder is heated, the ignition success rate is increased, and the stable combustion effect is improved.
Description
Technical field
The invention belongs to thermal boiler field, relate to the combustion system of boiler, relate in particular to a kind of micro-oil mass ignition gradual combustor.
Background technology
The mode that traditional station boiler igniting generally adopts is grease gun igniting.When boiler ignition start, first put oil combustion gun, after the oily certain hour that burns, burner hearth is heated to the ignition temperature of breeze airflow in burner hearth, now coal dust is blown into burner hearth and carries out oily coal multifuel combustion.When boiler reaches more than 50% load, when breeze airflow can smooth combustion, fuel oil is excised gradually, complete boiler ignition start process.For cost-saving, reduce the fuel oil consumption of station boiler, lot of domestic and international company has developed multiple micro-oil ignition burner, and is widely used on a lot of station boilers.
Micro-oil ignition burner is a kind of internally fired device, and its operation principle is first to light the micro-oil gun being arranged in a wind pipeline and produce the flue gas of a large amount of high temperature, then is heated and lighted wind breeze airflow one time by these high-temperature flue gas.One of design philosophy of existing micro-oil ignition burner is " multistep ignition, amplification step by step ", sprayed the fuel oil of atomization by micro-oil mass ignition device, in burner, light part coal dust, form new, the large incendiary source of thermal power, remove again to light other a part of coal dust, form another larger incendiary source, finally adopt the mode of this " multistep ignition, amplification step by step ", light whole wind breeze airflows of main burner.So it is very crucial that the high-temperature flue gas that the design quality of micro-oil ignition burner produces after for oil firing is lighted the success or not of a wind breeze airflow.
Existing gradual combustor inside, adopts the hierarchy of metal thin-wall cylinder more.Can only there is blending in the breeze airflow of having lighted and unlit breeze airflow, the length of cylinder and radius can only be determined by test and experience, cause the bad adaptability to Coal rank in cylinder exit.
Summary of the invention
The object of the present invention is to provide a kind of micro-oil mass ignition gradual combustor, can, by the mode of " multistep ignition, amplification step by step ", use the less micro-oil mass ignition device of fuel consumption directly to put a wind breeze airflow of combusting boiler.
In order to achieve the above object, the present invention adopts following technical solution to be achieved: a kind of micro-oil mass ignition gradual combustor, comprise micro-oil mass ignition device and burner, in burner, be at least furnished with one group of guide vane group, guide vane group at least comprises 2 guide vanes, guide vane is taking burner center line as axle, and hoop is arranged, had gap between guide vane.The technical program, in burner internal placement the guide vane group of breeze airflow, guide vane group can be carried out classification to a wind breeze airflow, in the space that the high-temperature flue gas producing after the atomized fuel burning of micro-oil mass ignition device ejection comprises in breeze airflow guide vane group, light a wind breeze airflow of a part, and form new, stable, the larger incendiary source of thermal power at the end outlet of vane group, light a remaining wind breeze airflow.Again owing to having gap between the blade in this guide vane group, breeze airflow can be by the Clearance Flow between blade, strengthen the blending of firing coal-dust and unignited coal dust of burner inside, strengthen the backflow of high-temperature flue gas and entrainmented, more coal dust is heated, improved the success rate of igniting and the effect of smooth combustion.
On guide vane, be connected with movable guide rod, movable guide rod is for delivering to each guide vane burner middle part composition guide vane group.When burner uses as start-up burner, one group of blade pushes burner simultaneously, and the breeze airflow in burner is carried out to classification, adopts micro-oil mass ignition device " igniting step by step, classification are amplified " mode firing coal-dust airflow; In the time that this burner uses as main burner, extract micro-oil mass ignition device out, at this moment the guide vane group of breeze airflow can be remained stationary and be continued breeze airflow classification, also can from burner, extract out, breeze airflow is not carried out to classification.
N breeze airflow guide vane (digital N >=2) is taking burner center line as axle, and hoop is arranged, formed a vane group.The special case situation of vane group only includes a blade in this group, the drum that this blade is opening, and shape of cross section is English alphabet " C " shape.The quantity of guide vane is preferably 4 ~ 6.
Movable guide rod radially pierces into burner, can drive guide vane radially movable, and guide vane has the radius of curvature identical with burner inner wall.The guide vane of breeze airflow is long and narrow bending arc shape, and the planar development of bending cambered surface is shaped as rectangle, parallelogram, trapezoidal or other geometric shapes.The radius of curvature of the curved edges of the guide vane of breeze airflow is taking the radius of curvature of burner nozzle as optimum value.The special case situation of breeze airflow guide vane is planar rectangular, plane parallel quadrangle, planar trapezoidal or other geometric shapes.When igniting, guide vane is delivered to burner middle part composition guide vane group by movable guide rod, after having lighted a fire, in the time that this burner uses as main burner, can be close to burner inner wall by extraction activity guide rod to guide vane.
Movable guide rod, from the axial insertion burner of burner, can drive guide vane axially movable.
This vane group is taking burner center line as axle, and hoop is arranged, can surround (or approximate encirclement) shape as the solid space of prism, cylinder, Rotary-table or other geometric shapes, the coaxial layout of this solid space and burner.
Blade in this group can, respectively taking some point as the center of circle, move back and forth mode with circular arc, till rotation is inserted burner or is drawn to blade and is close to burner inner wall.
The breeze airflow guide vane of the present invention's design, and some above-mentioned guide vanes breeze airflow guide vane group that grouping method forms designed according to this invention, strengthen the blending of firing coal-dust and unignited coal dust of burner inside, strengthen the backflow of high-temperature flue gas and entrainmented, more coal dust is heated, improved the success rate of micro-oil mass ignition and the effect of smooth combustion.
Advantage of the present invention is: a kind of micro-oil mass ignition gradual combustor, comprise micro-oil mass ignition device and burner, in the time of ignition of the boiler, this system is utilized the direct firing coal-dust airflow of high-temperature flue gas producing after the atomized fuel burning of micro-oil mass ignition device ejection, fuel oil baker that need not be a large amount of, has very high oil-saving effect.The design of the breeze airflow guide vane group by burner inside, strengthen the blending of firing coal-dust and unignited coal dust of burner inside, strengthen the backflow of high-temperature flue gas and entrainmented, more coal dust is heated, having strengthened lighting and steady fuel efficiency fruit of breeze airflow.The present invention, concept is distinct, simple in structure, reasonable in design, and investment and operating cost are moderate, and cost performance is high, has advantages of a large amount of fuel oil of saving.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail;
Fig. 1 is micro-oil mass ignition gradual combustor schematic diagram of embodiment 1 and 2;
Fig. 2 be the A of Fig. 1 to view, be embodiment 1 vane group form schematic diagram in burner while lighting a fire;
Before Fig. 3 is igniting, the form schematic diagram that the vane group of embodiment 1 is packed up in burner;
Fig. 4 is the three-view diagram of the guide vane of embodiment 1 and embodiment 2;
Fig. 5 be the A of Fig. 1 to view, be embodiment 2 vane group form schematic diagram in burner while lighting a fire;
Before Fig. 6 is igniting, the form schematic diagram that the vane group of embodiment 2 is packed up in burner;
Fig. 7 is micro-oil mass ignition gradual combustor schematic diagram of embodiment 3;
Fig. 8 is the three-view diagram of the guide vane of embodiment 3;
Fig. 9 be the B of Fig. 7 to view, be the vane group of the embodiment 3 form schematic diagram in burner.
Detailed description of the invention
Illustrate the present invention below in conjunction with example.
Embodiment 1
With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the micro-oil mass ignition gradual combustor of one of the present invention, comprises micro-oil mass ignition device 1 and burner 2.In burner 2, be furnished with 2 groups of guide vane groups 3, this guide vane group 3 comprises 4 guide vanes 5, between guide vane 5, all there is gap, guide vane is arc shape, radius of curvature is identical with burner nozzle radius of curvature, the center of circle of guide vane 5 cambered surfaces, in burner, is connected with movable guide rod 4 on guide vane 5.Guide vane group 3 and the coaxial layout of burner 2.Movable guide rod 4 radially pierces into burner 2, can drive guide vane 5 radially movable.
Before igniting, as shown in Figure 3, guide vane 5 is packed up, and is attached to burner inner wall.In the time of ignition of the boiler, as shown in Figure 2,4 guide vanes that movable guide rod 4 promotes guide vane group 3 all push burner middle part.This vane group can be divided into breeze airflow two parts (or the approximate two parts that are divided into).Micro-oil mass ignition device 1 is from axial insertion burner 2, the high-temperature flue gas producing after the atomized fuel burning that micro-oil mass ignition device 1 sprays fills in the 1st group of space that vane group 3 is surrounded, the breeze airflow that enters this space is lighted, and form new at this vane group end outlet, stable, the larger incendiary source of thermal power, utilize this incendiary source to light and newly enter the 2nd group of breeze airflow in vane group 3, and form larger incendiary source at the 2nd group of vane group end, this incendiary source enters boiler furnace, and light last layer breeze airflow, finally in boiler furnace, form a Great Fire Ball.
Between guide vane 5 in this vane group 3, all there is gap, breeze airflow can be by the Clearance Flow between guide vane 5, strengthen the blending of firing coal-dust and unignited coal dust of burner inside, strengthen the backflow of high-temperature flue gas and entrainmented, more coal dust is heated, improved the success rate of micro-oil mass ignition and the effect of smooth combustion.
Treat that ignition of the boiler is complete, when this burner uses as main burner, extract micro-oil mass ignition device 1 out burner.Guide vane group 3 can continue classification breeze airflow, till also can being drawn to guide vane 5 and being close to burner inner wall by movable guide rod 4.
Embodiment 2
With reference to Fig. 1, Fig. 4, Fig. 5 and Fig. 6, the difference of the present embodiment and embodiment 1 is, in the present embodiment, guide vane group 3 comprises 6 breeze airflow guide vanes 5, the radius of curvature of guide vane 5 is identical with the radius of curvature of burner nozzle, the center of circle of guide vane 5 cambered surfaces is in burner, and each breeze airflow guide vane 5 is taking certain centre point 6 as the center of circle (centre point 6 is as the pivot of blade 5) respectively, inserts burner 2 in circular arc reciprocating motion mode.This vane group 3 can be divided into breeze airflow two parts (or the approximate two parts that are divided into).Micro-oil mass ignition device 1 axially inserts the space that guide vane group 3 is surrounded, the breeze airflow that enters this space is lighted, and form new, stable, the larger incendiary source of thermal power at these guide vane group 3 end outlets, utilize this incendiary source to light remaining breeze airflow.
Between guide vane 5 in this vane group 3, all there is gap, breeze airflow can be by the Clearance Flow between guide vane 5, strengthen the blending of firing coal-dust and unignited coal dust of burner inside, strengthen the backflow of high-temperature flue gas and entrainmented, more coal dust is heated, improved the success rate of micro-oil mass ignition and the effect of smooth combustion.
Treat that ignition of the boiler is complete, when this burner uses as main burner, can extract micro-oil mass ignition device 1 out burner.Guide vane group 3 can continue classification breeze airflow, till also can rotating and being drawn to guide vane 5 and being close to burner inner wall.
Embodiment 3
With reference to Fig. 7, Fig. 8 and Fig. 9, the difference of the present embodiment and embodiment 1 is, in the present embodiment, guide vane group 3 comprises 5 breeze airflow guide vanes 5, the radius of curvature of guide vane 5 is identical with the radius of curvature of burner nozzle, the center of circle of guide vane 5 cambered surfaces is outside burner, movable guide rod 4 promotes guide vane group 3 and axially inserts burner from burner, also can guide vane group 3 axially be extracted out from burner by movable guide rod 4, guide vane 3 inserts or extracts out burner from axial (vertical paper direction Fig. 9).This vane group 3 can be divided into breeze airflow two parts (or the approximate two parts that are divided into).The space that micro-oil mass ignition device 1 axial-entry blade group 3 is surrounded, the breeze airflow that enters this space is lighted, and form new, stable, the larger incendiary source of thermal power at these vane group 3 end outlets, utilize this incendiary source to light remaining breeze airflow.
Claims (6)
1. a micro-oil mass ignition gradual combustor, comprise micro-oil mass ignition device (1) and burner (2), it is characterized in that, in described burner (2), be at least furnished with one group of guide vane group (3), described guide vane group (3) at least comprises 2 guide vanes (5), in burner (2) inner loop, to layout, there is gap between (5) in guide vane; Guide vane is arc surfaced, is connected with movable guide rod (4) on described guide vane (5), and described movable guide rod (4) is for delivering to each guide vane (5) burner (2) middle part composition guide vane group (3); Guide vane group (3) can continue classification breeze airflow, till also can rotating and being drawn to guide vane (5) and being close to burner inner wall.
2. micro-oil mass ignition gradual combustor according to claim 1, it is characterized in that, described movable guide rod (4) radially pierces into burner (2), can drive guide vane (5) radially movable, and described guide vane (5) has the radius of curvature identical with burner inner wall.
3. micro-oil mass ignition gradual combustor according to claim 1, is characterized in that, described movable guide rod (4), from the axial insertion burner (2) of burner (2), can drive guide vane (5) axially movable.
4. according to the micro-oil mass ignition gradual combustor described in claim 1,3, it is characterized in that, described guide vane (5) is long and narrow bending arc shape, the cambered surface bending radius of guide vane (5) is identical with the radius of curvature of burner inner wall, and the planar development of bending cambered surface is shaped as parallelogram or trapezoidal.
5. micro-oil mass ignition gradual combustor according to claim 1, is characterized in that, the center of circle of guide vane (5) cambered surface is in burner (2) or outside burner (2).
6. micro-oil mass ignition gradual combustor according to claim 1, is characterized in that, guide vane group (3) is more than two.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110442989.8A CN102434877B (en) | 2011-12-26 | 2011-12-26 | Micro oil mass ignition gradual combustor |
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| CN201110442989.8A CN102434877B (en) | 2011-12-26 | 2011-12-26 | Micro oil mass ignition gradual combustor |
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| CN102434877A CN102434877A (en) | 2012-05-02 |
| CN102434877B true CN102434877B (en) | 2014-07-09 |
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| CN111999429B (en) * | 2020-09-01 | 2022-06-21 | 中北大学 | Quasi-static simulator for high-temperature fireball |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2387392Y (en) * | 1999-07-21 | 2000-07-12 | 王炜 | Graded burning coal powder burner |
| CN101210675A (en) * | 2007-12-25 | 2008-07-02 | 杭州意能节能技术有限公司 | Micro-oil ignition rotational flow pulverized coal burner with center wind |
| CN101135444B (en) * | 2007-09-27 | 2010-08-25 | 烟台龙源电力技术股份有限公司 | Adjustable concentrating device suitable for few-oil ignition or plasma ignition |
| CN101545632B (en) * | 2009-04-30 | 2011-03-30 | 深圳东方锅炉控制有限公司 | Micro oil pulverized coal burner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650165B2 (en) * | 1985-05-01 | 1994-06-29 | バブコツク日立株式会社 | Swirl flow generator |
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2011
- 2011-12-26 CN CN201110442989.8A patent/CN102434877B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2387392Y (en) * | 1999-07-21 | 2000-07-12 | 王炜 | Graded burning coal powder burner |
| CN101135444B (en) * | 2007-09-27 | 2010-08-25 | 烟台龙源电力技术股份有限公司 | Adjustable concentrating device suitable for few-oil ignition or plasma ignition |
| CN101210675A (en) * | 2007-12-25 | 2008-07-02 | 杭州意能节能技术有限公司 | Micro-oil ignition rotational flow pulverized coal burner with center wind |
| CN101545632B (en) * | 2009-04-30 | 2011-03-30 | 深圳东方锅炉控制有限公司 | Micro oil pulverized coal burner |
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| CN102434877A (en) | 2012-05-02 |
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