CN102788347A - Tiny-oil ignition pulverized coal combustion system - Google Patents
Tiny-oil ignition pulverized coal combustion system Download PDFInfo
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- CN102788347A CN102788347A CN2012101873133A CN201210187313A CN102788347A CN 102788347 A CN102788347 A CN 102788347A CN 2012101873133 A CN2012101873133 A CN 2012101873133A CN 201210187313 A CN201210187313 A CN 201210187313A CN 102788347 A CN102788347 A CN 102788347A
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- spiral camber
- pulverized coal
- oil mass
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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 little oil mass igniting pulverized coal combustion system, belong to the combustion system technical field of thermal boiler.
Background technology
The mode that traditional station boiler igniting is generally adopted is a grease gun igniting.First some oil combustion gun during boiler ignition start, oil behind the burning certain hour are heated to burner hearth the ignition temperature of breeze airflow in burner hearth, be blown into burner hearth with coal dust and carry out oily coal multifuel combustion this moment.When boiler reaches more than 50% load, when breeze airflow can smooth combustion, fuel oil is excised gradually, accomplish the boiler ignition start process.In order to practice thrift cost, reduce the fuel oil consumption of station boiler, lot of domestic and international company has developed multiple little oil mass igniting pulverized coal burner, and on a lot of station boilers, is widely used.
Little oil mass igniting pulverized coal burner is a kind of internally fired device, and the high-temperature flue gas that produces after the atomized fuel burning by little oil mass igniter ejection comes direct firing coal-dust airflow as incendiary source.Because the purpose of little oil mass igniter fuel-economizing fuel oil; Existing little oil mass igniting pulverized coal burner all is designed to the burner of fractional combustion, and the high-temperature flue gas that is promptly produced by atomized fuel burning back is lighted the part coal dust in burner, forms new, thermal power a little incendiary source greatly; Remove to light other a part of coal dust again; Form another bigger 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 little oil mass igniting pulverized coal combustion system produces for atomized fuel burning back is lighted a wind breeze airflow success or not.
A kind of little oil mass igniting pulverized coal combustion system of the present invention comprises little oil mass igniter and burner.In the burner internal placement spiral camber is arranged; 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 present invention provides the enough less ignition energies of a kind of ability to go to light the combustion system of endless relatively big breeze airflow; And this system is wide to the accommodation of coal, wind speed, wind-warm syndrome, has improved the success rate of little oil mass igniting and the effect of smooth combustion.
Summary of the invention
The object of the present invention is to provide a kind of little oil mass igniting pulverized coal combustion system, comprise little oil mass igniter and burner.In the burner internal placement spiral camber is arranged; Adopt spiral camber that a wind breeze airflow is carried out classification; Utilize the high-temperature flue gas of the atomized fuel burning back generation of little oil mass igniter ejection to light a part of coal dust earlier; Stable in the inner formation of burner, the bigger incendiary source of thermal power removes to light other breeze airflow again.A kind of little oil mass igniting pulverized coal combustion system of the present invention has simple in structure, easy to operate, excellent performance, the advantage of practicing thrift 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 little oil mass igniting pulverized coal combustion system; Comprise little oil mass igniter and burner; It is characterized in that, be furnished with at least one spiral camber in the described burner, little oil mass igniter, spiral camber and the coaxial layout of burner.Spiral camber is with the breeze airflow classification; Little oil mass igniter is axially inserted the space that inner ring surrounded of spiral camber; The breeze airflow that the high-temperature flue gas that ejection atomized fuel burning back produces will get in the inner ring is lighted, and forms new, stable, the bigger incendiary source of thermal power at the end outlet place of inner ring, and utilizes this incendiary source to light the breeze airflow between the inner ring and second circle; And form new incendiary source, finally light remaining breeze airflow.
Preferably; The cross section trace shape of described spiral camber satisfies as gives a definition: a moving point is done straight reciprocating motion along a bus on the taper seat; This bus is done circumference around the axis of taper seat and is moved back and forth then moving some cross section trace shape that is spiral camber in the projection of shape of the movement locus on the taper seat on the circular cone bottom surface simultaneously.
Preferably, the cross section trace shape of described spiral camber satisfies 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 satisfies 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, so formed trace shape of moving point is the cross section trace shape of spiral camber.
(I have adjusted word order once.)
Facing on the direction of burner outlet, spiral camber can be right handed, also can be rotation counterclockwise.
Facing on the direction of burner outlet, spiral camber can be to expand outwardly rotation gradually, also can be inwardly to shrink rotation gradually.
Preferably, when the number of spiral camber greater than 1 the time, spiral camber is mutually nested, is installed in the burner.
Preferably, the central lines of the axis of described spiral camber and burner.
Preferably, the number of described spiral camber is 1 or 2.
Preferably, described spiral camber is formed around axis rotation 1 circle by bus at least.
More preferably, described spiral camber is formed around axis rotation 1 circle, 2 circles or 3 circles by bus.
As shown in Figure 4, as shown in Figure 6 for the profile sketch map of spiral camber, be the cross section cross-sectional schematic (to clockwise turn to example) of spiral camber towards paper, described spiral camber can be with breeze airflow classification (or approximate classification).As shown in Figure 5; Little oil mass igniter is axially inserted the space that inner ring surrounded of spiral camber; The breeze airflow that gets into this space is lighted; And at spiral camber inner or end outlet forms new, stable, the bigger incendiary source of thermal power, utilize this incendiary source to light the breeze airflow between the inner ring and second circle, and " multistep ignition, amplify step by step " lighted whole breeze airflows.When burner used as start-up burner, spiral camber pushed burner, and the breeze airflow in the burner is carried out classification, and little oil mass igniter adopts " igniting step by step, classification are amplified " mode firing coal-dust airflow; When treating that this burner uses as main burner, extract little oil mass igniter out, spiral camber can continue also can extract burner out to the breeze airflow classification, breeze airflow is not carried out classification.
Compared with prior art, advantage of the present invention is:
1, the invention provides the combustion system that the enough less ignition energies of a kind of ability remove to light endless relatively big breeze airflow; Because the present invention adopts the multistep ignition mode; The spiral camber of a rotation N circle (digital N >=1) is divided into breeze airflow (containing approximate being divided into) N+1 level.Be after pulverized coal borne air flow gets into burner; What of total powder amount no matter; The powder amount that gets into the inner ring of spiral camber is certain, can confirm the size of inner ring according to the ignition ability and the igniting complexity of using coal of little oil mass igniter, and the coal dust that guarantees to get into inner ring can be lighted and smooth combustion by incendiary source; Remove to light the coal dust between the inner ring and second circle with the inner ring flame of smooth combustion; Light step by step successively again i circle and i+1 circle (coal dust between the digital i＜N), the coal dust between spiral camber and burner, thereby realization is lighted endless relatively big coal dust with the incendiary source of less igniting power.
2, the present invention utilizes the direct firing coal-dust airflow of high-temperature flue gas that the atomized fuel burning back of little oil mass igniter ejection produces, and fuel oil baker that need not be a large amount of has very high oil-saving effect.
3, notion of the present invention is distinct, and is 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 the manufacturing and the use of spiral camber are provided convenience.
Description of drawings
Fig. 1 is the little oil mass igniting pulverized coal combustion system sketch map that is furnished with spiral camber;
Fig. 2 is furnished with the fractional combustion device A of 1 spiral camber to view;
Fig. 3 is furnished with the fractional combustion device A of 2 spiral cambers to view;
Fig. 4 is the profile sketch map 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.
The specific embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment 1
As shown in Figure 1; For being furnished with little oil mass igniting pulverized coal combustion system sketch map of spiral camber; Described little oil mass igniting pulverized coal combustion system comprises little oil mass igniter 1 and burner 2; Be furnished with a spiral camber in the described burner 2, little oil mass igniter 1, spiral camber 3 and burner 2 coaxial layouts, the axis of spiral camber and the central lines of burner.As shown in Figure 2, to face on the direction of burner outlet, spiral camber 3 is counterclockwise to expand outwardly rotation, 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 the taper seat; This bus is done the circumference reciprocating motion around the axis of taper seat simultaneously, and then moving point is in the projection of shape of the movement locus on the taper seat on the circular cone bottom surface.The cross section trace shape of described spiral camber 3 satisfies 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, so formed trace shape of moving point is the cross section trace shape of spiral camber 3.
When ignition of the boiler, spiral camber 3 can be divided into three parts (or approximate three parts that are divided into) with breeze airflow.Little oil mass igniter 1 is axially inserted the space that inner ring surrounded of spiral camber 3; The breeze airflow that gets into this space is lighted; And form new, stable, the bigger incendiary source of thermal power at the end outlet place of the inner ring of spiral camber 3; Utilize this incendiary source to light the breeze airflow between the inner ring and second circle, and form new incendiary source, finally light whole breeze airflows.
Treat that ignition of the boiler finishes, when this burner uses as main burner, extract little oil mass igniter 1 out burner.Spiral camber 3 can continue the classification breeze airflow, also can extract burner together out with little oil mass igniter 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 the burner 2, and each spiral camber 3 is formed around axis rotation 2 circles by bus, and spiral camber 3 is mutually nested, is installed in the burner 2.On the direction in the face of burner 2 outlets, spiral camber 3 counterclockwise expands outwardly rotation gradually.
Be similar to embodiment 1; Difference is, and is as shown in Figure 7, in the present embodiment; Be furnished with a slice spiral camber 3 in the burner 2; Its cross section trace shape is: a moving point is done straight reciprocating motion along a bus on the taper seat, and this bus is done the circumference reciprocating motion around the axis of taper seat simultaneously, and then moving point is in the projection of shape of the movement locus on the taper seat on the circular cone bottom surface.But facing on the direction of burner outlet, spiral camber 3 is laterally zygomorphic structures.The axis of while spiral camber 3 and the central lines of burner body 2.
When ignition of the boiler, spiral camber 3 can be divided into five parts (or approximate five parts that are divided into) with breeze airflow.Little oil mass igniter 1 is axially inserted the space that inner ring surrounded of spiral camber 3; The breeze airflow that gets into this space is lighted; And form new, stable, the bigger incendiary source of thermal power at the end outlet place of the inner ring of spiral camber 3, 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, is furnished with a slice spiral camber 3 in the burner body 2, and its cross section trace shape satisfies Archimedes spiral equation ρ=50 θ (2 π≤θ≤6 π, ρ are utmost point footpath, and θ is a polar angle) under the polar coordinate system.According to given equation, can easily produce this spiral camber.
When ignition of the boiler, spiral camber 3 can be divided into three parts (or approximate three parts that are divided into) with breeze airflow.Little oil mass igniter 1 is axially inserted the space that inner ring surrounded of spiral camber 3; The breeze airflow that gets into this space is lighted; And form new, stable, the bigger incendiary source of thermal power at the end outlet place of the inner ring of spiral camber 3; Utilize this incendiary source to light the breeze airflow between the inner ring and 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 the burner body 2, and its cross section trace shape satisfies the logatithmic spiral equation ρ=50e under the polar coordinate system
θ(0≤θ≤2 π, ρ are utmost point footpath, and θ is a polar angle).According to given equation, can easily produce this spiral camber.
When ignition of the boiler, spiral camber 3 can be with breeze airflow separated into two parts (or approximate separated into two parts).Little oil mass igniter 1 is axially inserted the space that inner ring surrounded of spiral camber 3; The breeze airflow that gets into this space is lighted; And form new, stable, the bigger incendiary source of thermal power at the end outlet place of the inner ring of spiral camber 3, 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 the burner body 2, and its cross section trace shape satisfies the involute parametric equation of the circle under the plane right-angle coordinate
(0≤θ≤2 π, x for moving some P in the axial projection coordinate of x, y for moving some P in the axial projection coordinate of y, the origin of coordinates is O, θ is the angle of line segment OP and x axle positive direction, line segment OP is rotated counterclockwise to just).According to given parametric equation, can easily produce this spiral camber.
When ignition of the boiler, spiral camber 3 can be with breeze airflow separated into two parts (or approximate separated into two parts).Little oil mass igniter 1 is axially inserted the space that inner ring surrounded of spiral camber 3; The breeze airflow that gets into this space is lighted; And form new, stable, the bigger incendiary source of thermal power at the end outlet place of the inner ring of spiral camber 3, 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 the burner body 2, and its cross section trace shape satisfies the fermat spiral equation ρ under the polar coordinate system
2=θ (π≤θ≤5 π, ρ are utmost point footpath, and θ is a polar angle).According to given equation, can easily produce this spiral camber.
When ignition of the boiler, spiral camber 3 can be divided into three parts (or approximate three parts that are divided into) with breeze airflow.Little oil mass igniter 1 is axially inserted the space that inner ring surrounded of spiral camber 3; The breeze airflow that gets into this space is lighted; And form new, stable, the bigger incendiary source of thermal power at the end outlet place of the inner ring of spiral camber 3; Utilize this incendiary source to light the breeze airflow between the inner ring and 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 the burner body 2, and its cross section trace shape satisfies the lituus equation ρ under the polar coordinate system
2θ=10
5(
ρ is utmost point footpath, and θ is a polar angle).According to given equation, can easily produce this spiral camber.
When ignition of the boiler, spiral camber 3 can be divided into three parts (or approximate three parts that are divided into) with breeze airflow.Little oil mass igniter 1 is axially inserted the space that inner ring surrounded of spiral camber 3; The breeze airflow that gets into this space is lighted; And form new, stable, the bigger incendiary source of thermal power at the end outlet place of the inner ring of spiral camber 3; Utilize this incendiary source to light the breeze airflow between the inner ring and second circle, and form new incendiary source, finally light whole breeze airflows.
Claims (9)
1. little oil mass igniting pulverized coal combustion system; Comprise little oil mass igniter (1) and burner (2); It is characterized in that described burner is furnished with at least one spiral camber in (2), little oil mass igniter (1), spiral camber (3) and the coaxial layout of burner (2).
2. little oil mass igniting pulverized coal combustion system as claimed in claim 1; It is characterized in that; The cross section trace shape of described spiral camber (3) satisfies as gives a definition: a moving point is done straight reciprocating motion along a bus on the taper seat; This bus is done circumference around the axis of taper seat and is moved back and forth then moving some cross section trace shape that is spiral camber (3) in the projection of shape of the movement locus on the taper seat on the circular cone bottom surface simultaneously.
3. little oil mass igniting pulverized coal combustion system as claimed in claim 1; It is characterized in that the cross section trace shape of described spiral camber (3) satisfies involute equation, fermat spiral equation or the lituus equation of Archimedes spiral equation, logatithmic spiral equation, circle.
4. little oil mass igniting pulverized coal combustion system as claimed in claim 1; It is characterized in that; The cross section trace shape of described spiral camber (3) satisfies 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, so formed trace shape of moving point is the cross section trace shape of spiral camber (3).
5. little oil mass igniting pulverized coal combustion system as claimed in claim 1 is characterized in that, when the number of spiral camber (3) greater than 1 the time, spiral camber (3) is mutually nested, is installed in the burner (2).
6. little oil mass igniting pulverized coal combustion system as claimed in claim 1 is characterized in that the axis of described spiral camber (3) and the central lines of burner.
7. little oil mass igniting pulverized coal combustion system as claimed in claim 1 is characterized in that the number of described spiral camber (3) is 1 or 2.
8. little oil mass igniting pulverized coal combustion system as claimed in claim 1 is characterized in that described spiral camber (3) is formed around axis rotation 1 circle by bus at least.
9. little oil mass igniting pulverized coal combustion system as claimed in claim 8 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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| Application Number | Priority Date | Filing Date | Title |
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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 CN102788347B (en) | 2014-11-12 |
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Citations (8)
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|---|---|---|---|---|
| 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 |
| US4690075A (en) * | 1984-08-16 | 1987-09-01 | Stein Industrie | Ignition and combustion supporting burner for pulverized solid fossil fuel and combustion chamber comprising same |
| 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 |
| US20030143502A1 (en) * | 2002-01-31 | 2003-07-31 | Heier Kevin Ray | 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 |
| 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 |
| CN201081245Y (en) * | 2007-06-08 | 2008-07-02 | 王志鹏 | Cyclone thin-oil or gas ignition powdered coal burner |
| CN101526226A (en) * | 2009-04-24 | 2009-09-09 | 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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2012
- 2012-06-07 CN CN201210187313.3A patent/CN102788347B/en active Active
Patent Citations (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 |
| US4690075A (en) * | 1984-08-16 | 1987-09-01 | Stein Industrie | Ignition and combustion supporting burner for pulverized solid fossil fuel and combustion chamber comprising same |
| 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 |
| US20030143502A1 (en) * | 2002-01-31 | 2003-07-31 | Heier Kevin Ray | 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 |
| CN101526226A (en) * | 2009-04-24 | 2009-09-09 | 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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