CN102788347B - Tiny-oil ignition pulverized coal combustion system - Google Patents
Tiny-oil ignition pulverized coal combustion system Download PDFInfo
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- CN102788347B CN102788347B CN201210187313.3A CN201210187313A CN102788347B CN 102788347 B CN102788347 B CN 102788347B CN 201210187313 A CN201210187313 A CN 201210187313A CN 102788347 B CN102788347 B CN 102788347B
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Abstract
The invention provides a tiny-oil ignition pulverized coal combustion system. The system comprises a tiny-oil ignition device and a burner, and is characterized in that the burner is provided with at least one spiral curved surface. The tiny-oil ignition device, the spiral curved surface and the burner are coaxially arranged. According to the invention, the spiral curved surface is adopted to classify a first time pulverized coal air flow; a part of the pulverized coal is ignited by high temperature flue gas produced by combustion of atomized fuel sprayed by the tiny-oil ignition device; a stable ignition source with higher heat power is formed in the burner to ignite the other part of the pulverized coal flow. The tiny-oil ignition pulverized coal combustion system provided by the invention has the advantages of simple structure, convenient operation, excellent performance, and a large amount of fuel oil saved.
Description
Technical field
The present invention relates to a kind of micro-oil mass ignition pulverized coal combustion system, belong to the combustion system technical field of thermal boiler.
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 mass ignition coal burner, and is widely used on a lot of station boilers.
Micro-oil mass ignition coal burner is a kind of internally fired device, and the high-temperature flue gas producing after the atomized fuel burning by micro-oil mass ignition device ejection carrys out direct firing coal-dust airflow as incendiary source.Due to the object of micro-oil mass ignition device fuel-economizing fuel oil, existing micro-oil mass ignition coal burner is all designed to the burner of fractional combustion, in burner, light part coal dust by the high-temperature flue gas producing after atomized fuel burning, 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 mass ignition pulverized coal combustion system produces after burning for atomized fuel is lighted the success or not of a wind breeze airflow.
The micro-oil mass ignition pulverized coal combustion system of one of the present invention, comprises micro-oil mass ignition device and burner.There is spiral camber in burner internal placement, the spiral camber that adopts rotation N to enclose (digital N >=1) can be divided into a wind breeze airflow (or approximate being divided into) N+1 level, the invention provides a kind of combustion system that can remove to light with less ignition energy relatively endless large breeze airflow, and this system is wide to the accommodation of coal, wind speed, wind-warm syndrome, the success rate of micro-oil mass ignition and the effect of smooth combustion are improved.
Summary of the invention
The object of the present invention is to provide a kind of micro-oil mass ignition pulverized coal combustion system, comprise micro-oil mass ignition device and burner.There is spiral camber in burner internal placement, adopt spiral camber that a wind breeze airflow is carried out to classification, utilize the high-temperature flue gas producing after the atomized fuel burning of micro-oil mass ignition device ejection first to light a part of coal dust, stable in the inner formation of burner, the larger incendiary source of thermal power, then remove to light other breeze airflow.The micro-oil mass ignition pulverized coal combustion system of one of the present invention has simple in structure, easy to operate, excellent performance, the advantage of saving a large amount of fuel oil.
In order to achieve the above object, the present invention adopts following technical solution to be achieved: a kind of micro-oil mass ignition pulverized coal combustion system, comprise micro-oil mass ignition device and burner, it is characterized in that, in described burner, be furnished with at least one spiral camber, micro-oil mass ignition device, spiral camber and the coaxial layout of burner.Spiral camber is by breeze airflow classification, the space that micro-oil mass ignition assembly axis surrounds to the innermost circle of inserting spiral camber, the high-temperature flue gas producing after the burning of ejection atomized fuel is lighted the breeze airflow entering in innermost circle, and form the larger incendiary source of new, stable, thermal power at the end outlet place of innermost circle, and utilize this incendiary source to light the breeze airflow between innermost circle and the second circle, and form new incendiary source, finally light remaining breeze airflow.
Preferably, the cross section trace shape of described spiral camber meets as gives a definition: a moving point is done straight reciprocating motion along a bus on taper seat, this bus does circumference reciprocating motion around the axis of taper seat simultaneously, and the projection of shape of the movement locus of moving point on taper seat on circular cone bottom surface is the cross section trace shape of spiral camber.
Preferably, the cross section trace shape of described spiral camber meets involute equation, fermat spiral equation or the lituus equation (Lituus helical equation) of Archimedes spiral equation, logatithmic spiral equation, circle.
Preferably, the cross section trace shape of described spiral camber meets as gives a definition: in polar coordinate system in the plane, utmost point footpath ρ proportional increase or proportional minimizing with the minimizing of polar angle θ with the increase of polar angle θ of 1 moving point, the trace shape that so moving point forms is the cross section trace shape of spiral camber.
(I have adjusted word order once.)
Facing in the direction of burner outlet, spiral camber can be right handed, can be also counterclockwise rotation.
Facing in the direction of burner outlet, spiral camber can be to expand outwardly gradually rotation, can be also inwardly to shrink gradually rotation.
Preferably, in the time that the number of spiral camber is greater than 1, spiral camber is mutually nested, is arranged in burner.
Preferably, the axis of described spiral camber and the center line of burner overlap.
Preferably, the number of described spiral camber is 1 or 2.
Preferably, described spiral camber is formed around axis rotation at least 1 circle by bus.
More preferably, described spiral camber is formed around axis rotation 1 circle, 2 circles or 3 circles by bus.
As shown in Figure 4, for the profile schematic diagram of spiral camber, as shown in Figure 6, be the cross section cross-sectional schematic (to clockwise turn to example towards paper) of spiral camber, described spiral camber can be by breeze airflow classification (or approximate classification).As shown in Figure 5, the space that micro-oil mass ignition assembly axis surrounds to insertion spiral camber innermost circle, the breeze airflow that enters this space is lighted, and in spiral camber inside or end outlet form the larger incendiary source of new, stable, thermal power, utilize this incendiary source to light the breeze airflow between innermost circle and the second circle, and " multistep ignition, amplification step by step " light whole breeze airflows.When burner uses as start-up burner, spiral camber pushes burner, and the breeze airflow in burner is carried out to classification, and micro-oil mass ignition device adopts " 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, spiral camber can continue breeze airflow classification, also can extract burner out, breeze airflow is not carried out to classification.
Compared with prior art, advantage of the present invention is:
1, the invention provides a kind of combustion system that can remove to light with less ignition energy relatively endless large breeze airflow, because the present invention adopts multistep ignition mode, the spiral camber of a rotation N circle (digital N >=1), is divided into breeze airflow (being divided into containing approximate) N+1 level.Be that pulverized coal borne air flow enters after burner, no matter total powder amount number, the powder amount that enters spiral camber innermost circle is certain, can determine the size of innermost circle according to the igniting complexity of the ignition ability of micro-oil mass ignition device and application coal, guarantee enters the coal dust of innermost circle and can be lighted and smooth combustion by incendiary source, remove to light the coal dust between innermost circle and the second circle with the innermost circle flame of smooth combustion, light step by step successively again the coal dust between i circle and i+1 circle (digital i < N), until the coal dust between spiral camber and burner, thereby realize the incendiary source of using compared with point fire power and light relatively endless large coal dust.
2, the present invention utilizes the direct firing coal-dust airflow of high-temperature flue gas producing after the atomized fuel burning of micro-oil mass ignition device ejection, and fuel oil baker that need not be a large amount of, has very high oil-saving effect.
3, concept of the present invention is distinct, simple in structure, reasonable in design, and investment and operating cost are moderate, and cost performance is high.
4, the present invention has provided the trace shape of preferred and preferred spiral camber, and the number of preferred spiral camber rotating cycle and spiral camber, for manufacture and the use of spiral camber are provided convenience.
Brief description of the drawings
Fig. 1 is the micro-oil mass ignition pulverized coal combustion system schematic diagram that is furnished with spiral camber;
Fig. 2 is furnished with the gradual combustor A of 1 spiral camber to view;
Fig. 3 is furnished with the gradual combustor A of 2 spiral cambers to view;
Fig. 4 is the profile schematic diagram of spiral camber;
Fig. 5 is the axial cross-sectional schematic of spiral camber;
Fig. 6 is the cross section cross-sectional schematic (to clockwise turn to example towards paper) of spiral camber;
Fig. 7 is the spiral camber cross section cross-sectional schematic of upper and lower symmetric shape.
Detailed description of the invention
Illustrate the present invention below in conjunction with embodiment.
Embodiment 1
As shown in Figure 1, for being furnished with micro-oil mass ignition pulverized coal combustion system schematic diagram of spiral camber, described micro-oil mass ignition pulverized coal combustion system comprises micro-oil mass ignition device 1 and burner 2, in described burner 2, be furnished with a spiral camber, micro-oil mass ignition device 1, spiral camber 3 and the coaxial layout of burner 2, the axis of spiral camber overlaps with the center line of burner.As shown in Figure 2, facing in the direction of burner outlet, spiral camber 3 is counterclockwise to expand outwardly rotation, and described spiral camber is formed around axis rotation 2 circles by bus.
The cross section trace shape of described spiral camber 3 is: a moving point is done straight reciprocating motion along a bus on taper seat, this bus does circumference reciprocating motion around the axis of taper seat simultaneously, the projection of shape of the movement locus of moving point on taper seat on circular cone bottom surface.The cross section trace shape of described spiral camber 3 meets as gives a definition: in polar coordinate system in the plane, utmost point footpath ρ proportional increase or proportional minimizing with the minimizing of polar angle θ with the increase of polar angle θ of 1 moving point, the trace shape that so moving point forms is the cross section trace shape of spiral camber 3.
In the time of ignition of the boiler, spiral camber 3 can be divided into breeze airflow three parts (or approximate three parts that are divided into).Micro-oil mass ignition device 1 axially inserts the space that spiral camber 3 innermost circles are surrounded, the breeze airflow that enters this space is lighted, and form the larger incendiary source of new, stable, thermal power at the end outlet place of spiral camber 3 innermost circles, utilize this incendiary source to light the breeze airflow between innermost circle and the second circle, and form new incendiary source, finally light whole breeze airflows.
Treat that ignition of the boiler is complete, when this burner uses as main burner, extract micro-oil mass ignition device 1 out burner.Spiral camber 3 can continue classification breeze airflow, also can extract together burner out with micro-oil mass ignition device 1.
Embodiment 2
Be similar to embodiment 1, difference is: as shown in Figure 3, in the present embodiment, be furnished with two spiral cambers 3 in burner 2, each spiral camber 3 is formed around axis rotation 2 circles by bus, and spiral camber 3 is mutually nested, is arranged in burner 2.In the direction exporting in the face of burner 2, spiral camber 3 counterclockwise expands outwardly rotation gradually.
Embodiment 3
Be similar to embodiment 1, difference is, as shown in Figure 7, in the present embodiment, in burner 2, be furnished with a slice spiral camber 3, its cross section trace shape is: a moving point is done straight reciprocating motion along a bus on taper seat, and this bus does circumference reciprocating motion around the axis of taper seat simultaneously, the projection of shape of the movement locus of moving point on taper seat on circular cone bottom surface.But facing in the direction of burner outlet, spiral camber 3 is laterally zygomorphic structures.The axis of spiral camber 3 overlaps with the center line of burner body 2 simultaneously.
In the time of ignition of the boiler, spiral camber 3 can be divided into breeze airflow five parts (or approximate five parts that are divided into).Micro-oil mass ignition device 1 axially inserts the space that spiral camber 3 innermost circles are surrounded, the breeze airflow that enters this space is lighted, and form the larger incendiary source of new, stable, thermal power at the end outlet place of spiral camber 3 innermost circles, and utilize this incendiary source step by step light all the other breeze airflows.
Embodiment 4
Be similar to embodiment 1, difference is, in the present embodiment, in burner body 2, be furnished with a slice spiral camber 3, its cross section trace shape meets Archimedes spiral equation ρ=50 θ under polar coordinate system (2 π≤θ≤6 π, ρ is utmost point footpath, θ is polar angle).According to given equation, can easily produce this spiral camber.
In the time of ignition of the boiler, spiral camber 3 can be divided into breeze airflow three parts (or approximate three parts that are divided into).Micro-oil mass ignition device 1 axially inserts the space that spiral camber 3 innermost circles are surrounded, the breeze airflow that enters this space is lighted, and form the larger incendiary source of new, stable, thermal power at the end outlet place of spiral camber 3 innermost circles, utilize this incendiary source to light the breeze airflow between innermost circle and the second circle, and form new incendiary source, finally light whole breeze airflows.
Embodiment 5
Be similar to embodiment 1, difference is, in the present embodiment, is furnished with a slice spiral camber 3 in burner body 2, and its cross section trace shape meets the logatithmic spiral equation ρ=50e under polar coordinate system
θ(0≤θ≤2 π, ρ is utmost point footpath, θ is polar angle).According to given equation, can easily produce this spiral camber.
In the time of ignition of the boiler, spiral camber 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 spiral camber 3 innermost circles are surrounded, the breeze airflow that enters this space is lighted, and form new, stable, the larger incendiary source of thermal power at the end outlet place of spiral camber 3 innermost circles, utilize this incendiary source to light remaining breeze airflow.
Embodiment 6
Be similar to embodiment 1, difference is, in the present embodiment, is furnished with a slice spiral camber 3 in burner body 2, and its cross section trace shape meets the involute parametric equation of the circle under plane right-angle coordinate
(0≤θ≤2 π, x is for moving some P is in the axial projection coordinate of x, and y is for moving some P is in the axial projection coordinate of y, and the origin of coordinates is O, and θ is the angle of line segment OP and x axle positive direction, line segment OP is rotated counterclockwise as just).According to given parameters equation, can easily produce this spiral camber.
In the time of ignition of the boiler, spiral camber 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 spiral camber 3 innermost circles are surrounded, the breeze airflow that enters this space is lighted, and form new, stable, the larger incendiary source of thermal power at the end outlet place of spiral camber 3 innermost circles, utilize this incendiary source to light remaining breeze airflow.
Embodiment 7
Be similar to embodiment 1, difference is, in the present embodiment, is furnished with a slice spiral camber 3 in burner body 2, and its cross section trace shape meets the fermat spiral equation ρ under polar coordinate system
2=θ (π≤θ≤5 π, ρ is utmost point footpath, θ is polar angle).According to given equation, can easily produce this spiral camber.
In the time of ignition of the boiler, spiral camber 3 can be divided into breeze airflow three parts (or approximate three parts that are divided into).Micro-oil mass ignition device 1 axially inserts the space that spiral camber 3 innermost circles are surrounded, the breeze airflow that enters this space is lighted, and form the larger incendiary source of new, stable, thermal power at the end outlet place of spiral camber 3 innermost circles, utilize this incendiary source to light the breeze airflow between innermost circle and the second circle, and form new incendiary source, finally light whole breeze airflows.
Embodiment 8
Be similar to embodiment 1, difference is, in the present embodiment, is furnished with a slice spiral camber 3 in burner body 2, and its cross section trace shape meets the lituus equation ρ under polar coordinate system
2θ=10
5(
ρ is utmost point footpath, and θ is polar angle).According to given equation, can easily produce this spiral camber.
In the time of ignition of the boiler, spiral camber 3 can be divided into breeze airflow three parts (or approximate three parts that are divided into).Micro-oil mass ignition device 1 axially inserts the space that spiral camber 3 innermost circles are surrounded, the breeze airflow that enters this space is lighted, and form the larger incendiary source of new, stable, thermal power at the end outlet place of spiral camber 3 innermost circles, utilize this incendiary source to light the breeze airflow between innermost circle and the second circle, and form new incendiary source, finally light whole breeze airflows.
Claims (8)
1. a micro-oil mass ignition pulverized coal combustion system, comprise micro-oil mass ignition device (1) and burner (2), it is characterized in that, in described burner (2), be furnished with at least one spiral camber, micro-oil mass ignition device (1), spiral camber (3) and the coaxial layout of burner (2); The cross section trace shape of described spiral camber (3) meets as gives a definition: a moving point is done straight reciprocating motion along a bus on taper seat, this bus does circumference reciprocating motion around the axis of taper seat simultaneously, and the projection of shape of the movement locus of moving point on taper seat on circular cone bottom surface is the cross section trace shape of spiral camber (3).
2. micro-oil mass ignition pulverized coal combustion system as claimed in claim 1, it is characterized in that, the cross section trace shape of described spiral camber (3) meets involute equation, fermat spiral equation or the lituus equation of Archimedes spiral equation, logatithmic spiral equation, circle.
3. micro-oil mass ignition pulverized coal combustion system as claimed in claim 1, it is characterized in that, the cross section trace shape of described spiral camber (3) meets as gives a definition: in polar coordinate system in the plane, utmost point footpath proportional increase or proportional minimizing with the minimizing of polar angle with the increase of polar angle of 1 moving point, the trace shape that so moving point forms is the cross section trace shape of spiral camber (3).
4. micro-oil mass ignition pulverized coal combustion system as claimed in claim 1, is characterized in that, in the time that the number of spiral camber (3) is greater than 1, spiral camber (3) is mutually nested, is arranged in burner (2).
5. micro-oil mass ignition pulverized coal combustion system as claimed in claim 1, is characterized in that, the axis of described spiral camber (3) overlaps with the center line of burner.
6. micro-oil mass ignition pulverized coal combustion system as claimed in claim 1, is characterized in that, the number of described spiral camber (3) is 1 or 2.
7. micro-oil mass ignition pulverized coal combustion system as claimed in claim 1, is characterized in that, described spiral camber (3) is formed around axis rotation at least 1 circle by bus.
8. micro-oil mass ignition pulverized coal combustion system as claimed in claim 7, is characterized in that, described spiral camber is formed around axis rotation 1 circle, 2 circles or 3 circles by bus.
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| CN201210187313.3A CN102788347B (en) | 2012-06-07 | 2012-06-07 | Tiny-oil ignition pulverized coal combustion system |
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| CN201210187313.3A CN102788347B (en) | 2012-06-07 | 2012-06-07 | Tiny-oil ignition pulverized coal combustion system |
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| CN102788347B true CN102788347B (en) | 2014-11-12 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB377474A (en) * | 1930-12-17 | 1932-07-28 | Hanrez Sa J Atel | Improvements in or relating to process and burner for the combustion of powdered coal |
| FR2569256B1 (en) * | 1984-08-16 | 1989-04-07 | Stein Industrie | IGNITION AND COMBUSTION SUPPORT BURNER FOR FULLY SOLID SPRAYED FUEL, AND COMBUSTION CHAMBER COMPRISING SUCH BURNERS |
| CN2391107Y (en) * | 1999-10-26 | 2000-08-09 | 烟台开发区龙源电力燃烧控制工程有限公司 | Plasma ignitor for direct-ignition pulverized furnace |
| US6752620B2 (en) * | 2002-01-31 | 2004-06-22 | Air Products And Chemicals, Inc. | Large scale vortex devices for improved burner operation |
| CN1912462A (en) * | 2006-08-23 | 2007-02-14 | 傅宁娟 | Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage |
| CN201081245Y (en) * | 2007-06-08 | 2008-07-02 | 王志鹏 | Cyclone thin-oil or gas ignition powdered coal burner |
| CN101178175A (en) * | 2007-11-06 | 2008-05-14 | 徐州燃烧控制研究院有限公司 | Lean oil heat intensified firing actuating apparatus of pulverized coal boiler |
| CN101526226B (en) * | 2009-04-24 | 2011-01-05 | 中国航天空气动力技术研究院 | Double-helix pneumatic nebulized micro-oil igniting and flame stabilizing device |
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