CN102679335A - Tiny-oil ignition pulverized coal combustor - Google Patents
Tiny-oil ignition pulverized coal combustor Download PDFInfo
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- CN102679335A CN102679335A CN2012101876748A CN201210187674A CN102679335A CN 102679335 A CN102679335 A CN 102679335A CN 2012101876748 A CN2012101876748 A CN 2012101876748A CN 201210187674 A CN201210187674 A CN 201210187674A CN 102679335 A CN102679335 A CN 102679335A
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- pulverized coal
- screen drum
- oil mass
- little oil
- burner
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Abstract
The invention discloses a tiny-oil ignition pulverized coal combustor, which comprises a tiny-oil igniter and a combustor. The tiny-oil ignition pulverized coal combustor is characterized in that at least one screen drum is arranged in the combustor, high-temperature smoke which is generated after atomized fuel ejected from the tiny-oil igniter is combusted is filled in the screen drums, and pulverized coal airflow entering the combustor is approximately divided into two parts via the screen drums; the screen drums are columns or tables, and the wall of each screen drum is provided with slots which are uniformly distributed or densely distributed at one end of the drum wall; and the tiny-oil igniter, the screen drums and the combustor are coaxially arranged. The screen drums with the unique structures are arranged in the combustor, primary air pulverized coal airflow is classified by the screen drums, part of pulverized coal is ignited by the tiny-oil igniter with the low power, a stable ignition source with higher thermal power is formed in the combustor, and then other pulverized coal is ignited. Mixing of ignited pulverized coal and unignited pulverized coal in the combustor is strengthened, and tiny-oil ignition success rate is improved.
Description
Technical field
The invention belongs to the thermal boiler field, relate to the burner of boiler, relate in particular to a kind of little oil mass igniting pulverized coal burner.
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; So existing little oil mass igniting pulverized coal burner all is designed to the burner of fractional combustion; The high-temperature flue gas that promptly produces after the atomized fuel burning by little oil mass igniter ejection is lighted the part coal dust in burner; Form new, the bigger incendiary source of thermal power, 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.
At present, most fractional combustion device all is employed in the form realization breeze airflow separation and the classification of installing sleeve in the burner.In fact so-called sleeve is exactly a metallic cylinder (or cylindroid), and metallic cylinder successfully plays the effect of breeze airflow separation and classification, but still there is defective in the design of metallic cylinder.
As everyone knows, burning is a kind of complex physicochemical process that comprises heat transfer and mass transfer two class processes.The tiny-oil ignition device has been lighted the breeze airflow in the metallic cylinder; But receive the separation and the obstruction of barrel; Blending can only take place at the outlet circumference place of cylinder in breeze airflow of having lighted and unlit breeze airflow; Conduct heat process with mass transfer has increased the difficulty that the breeze airflow of having lighted is lighted other unlit breeze airflow, has reduced the applicability of burner to fuel.So must take heat transfer and mass transport process in the technological means intensified burner.
Summary of the invention
The object of the present invention is to provide a kind of little oil mass igniting pulverized coal burner, can separate with classification breeze airflow and light simultaneously, inner heat transfer and the mass transport process of ability intensified burner adopts the direct firing coal-dust airflow of little oil mass igniter.
In order to achieve the above object; The technical scheme that the present invention adopts provides a kind of little oil mass igniting pulverized coal burner; Comprise little oil mass igniter and burner, it is characterized in that, be provided with at least one screen drum in the described burner; Fill the high-temperature flue gas that the atomized fuel burning back generation of being ejected by little oil mass igniter is arranged in the screen drum, get into the interior breeze airflow of burner via the approximate separated into two parts of screen drum; Screen drum is cylinder or stage body, has even distribution on its barrel or at the hole slot of barrel one end dense distribution; Little oil mass igniter, screen drum and burner coaxial arrangement.
Preferably, be provided with one or two screen drum in the described burner.
Preferably, said stage body be the entrance point of breeze airflow than small end, its bigger end is the port of export of breeze airflow.
Preferably, the cross section of said screen drum is any one in circle, ellipse, triangle, square and the polygon.
Further, described polygon is a regular polygon.
Further, described regular polygon is a regular pentagon.
Preferably, the through-flow size of said hole slot is not less than the wall thickness of screen drum, and its gross area accounts for 5%～50% of screen drum barrel area.
Preferably, the outer rim of said hole slot is a closed curve.
Preferably, described hole slot is that any one or rectangle both sides that circle, rectangle, wedge shape, fan-shaped, circle lack in shape and the polygon are semicircular shape.
Preferably, the fluting direction of said hole slot be parallel or perpendicular to burner axially.
The present invention in the internal placement of burner the screen drum of a unique texture; Adopt screen drum that a wind breeze airflow is carried out classification; Utilize lower-powered little oil mass igniter 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.The screen drum of this structure is separated with classification breeze airflow and is lighted; Strengthened the blending of firing coal-dust and unignited coal dust of burner inside simultaneously; Strengthen the process of burner internal heat transfer and mass transfer, improved the success rate of little oil mass igniting and the effect of smooth combustion.The present invention also has simple in structure, and is easy to operate, the advantage of fuel savings oil.
Description of drawings
Fig. 1 is the structural representation of the little oil mass igniting pulverized coal burner of single screen drum;
Fig. 2 is the structural representation of two little oil mass igniting pulverized coal burners of screen drum;
Fig. 3 is the structural representation of rectangle screen drum;
Fig. 4 is the structural representation of circular screen drum;
Fig. 5 is the structural representation of regular pentagon screen drum;
Fig. 6 is the plane outspread drawing of circular hole slot screen drum;
Fig. 7 is the plane outspread drawing of square hole slot screen drum;
Fig. 8 is the plane outspread drawing of rectangle hole slot screen drum;
Fig. 9 is the vertically plane outspread drawing of the screen drum of layout of hole slot;
Figure 10 is the plane outspread drawing of the screen drum of hole slot horizontal arrangement;
Figure 11 is the cylinder screen drum of the intensive layout of hole slot;
Figure 12 is the stage body screen drum of the intensive layout of hole slot.
Among the figure:
1, little oil mass igniter; 2, burner;
3, screen drum; 31, first screen drum;
32, second screen drum; 4, hole slot.
The specific embodiment
For making the present invention more obviously understandable, now with preferred embodiment, and conjunction with figs. elaborates as follows.
As shown in Figure 1, be the structural representation of the little oil mass igniting pulverized coal burner of single screen drum, comprise little oil mass igniter 1 and burner 2.In burner 2, be furnished with screen drum 3, little oil mass igniter 1, screen drum 3 and burner 2 coaxial arrangement.Screen drum 3 is as shown in Figure 3, is stage body, and its cross section is a rectangle, has the hole slot 4 of even layout on its barrel, and hole slot 4 is circular, and the gross area of hole slot 4 accounts for 50% of screen drum 3 barrel areas.The size of hole slot is a lower limit with the wall thickness of screen drum, not destroy the screen drum structure or to guarantee that the screen drum structural strength is of a size of the upper limit, to guarantee that breeze airflow can conduct heat through sieve aperture smoothly and mass transport process is of a size of preferred size.The metallic cylinder that screen drum 3 adopts metal bar or metal tube to be made through cut also can adopt metal wire knitted or twine and make, and in braiding or winding process, forms the structure of hole slot 4.
When ignition of the boiler, little oil mass igniter 1 is axially inserted burner 2, and the high-temperature flue gas that the atomized fuel burning back that little oil mass igniter (1) ejects produces fills in screen drum 3 inside.Screen drum 3 is with the approximate separated into two parts of breeze airflow; High-temperature flue gas will get into the breeze airflow of screen drum 3 and light; And in the inside of screen drum 3 or the exit form new, stable, the bigger incendiary source of thermal power, utilize this incendiary source to light remaining breeze airflow.
As shown in Figure 1, be the structural representation of the little oil mass igniting pulverized coal burner of single screen drum, comprise little oil mass igniter 1 and burner 2.The difference of present embodiment and embodiment 1 is that the screen drum 3 in the present embodiment is as shown in Figure 4, is cylinder, the gross area of hole slot 4 account for screen drum 3 the barrel area 10%.
As shown in Figure 1, be the structural representation of the little oil mass igniting pulverized coal burner of single screen drum, comprise little oil mass igniter 1 and burner 2.The difference of present embodiment and embodiment 1 is that the screen drum 3 in the present embodiment is as shown in Figure 5, is cylinder; Its cross section is a regular pentagon; Hole slot 4 is that horizontal direction arranges, the rectangular opening that promptly is arranged in parallel with the direction of principal axis of burner 2, the gross area of hole slot 4 account for screen drum 3 the barrel area 5%.
The shape of hole slot 4 can be circle, and is as shown in Figure 6; Square, as shown in Figure 7; Rectangle, as shown in Figure 8; Can for the rectangle both sides shape of the similar pole of semicircle also, shown in Fig. 9-10.The distribution of hole slot 4 can be for vertical layout, and is as shown in Figure 9, also can be arranged horizontally, shown in figure 10.
Embodiment 5
As shown in Figure 1, be the structural representation of the little oil mass igniting pulverized coal burner of single screen drum, comprise plasma generator 1 and burner 2.The difference of present embodiment and embodiment 1 is; Screen drum 3 in the present embodiment is shown in figure 11, is cylinder, and its cross section is circular; Hole slot 4 is arranged for horizontal direction; The circular port that promptly is arranged in parallel with the direction of principal axis of burner 2, in an end dense distribution of screen drum 3, an end of dense distribution is the breeze airflow port of export.
Embodiment 6
As shown in Figure 1, be the structural representation of the little oil mass igniting pulverized coal burner of single screen drum, comprise plasma generator 1 and burner 2.The difference of present embodiment and embodiment 1 is; Screen drum 3 in the present embodiment is shown in figure 12, is stage body, and its cross section is a square; Hole slot 4 is arranged for horizontal direction; The circular port that promptly is arranged in parallel with the direction of principal axis of burner 2, in the bigger end dense distribution of screen drum 3, bigger end is the breeze airflow port of export.
Embodiment 7
As shown in Figure 2, be the structural representation of the little oil mass igniting pulverized coal burner of two screen drums, comprise plasma generator 1 and burner 2.Be furnished with first screen drum 31 and second screen drum 32 arranged side by side in the horizontal direction in the burner 2, less near first screen drum 31 of plasma generator 1, second screen drum 32 is bigger.Two screen drum plasma ignition coal burners that present embodiment provides; When ignition of the boiler; Plasma generator 1 axially inserts burner 2, and the high-temperature plasma of plasma generator 1 ejection fills in screen drum 3 inside, and the breeze airflow that gets into first screen drum 31 is lighted; And in the inside of second screen drum 32 or the exit form new, stable, the bigger incendiary source of thermal power, utilize this incendiary source to light remaining breeze airflow.
Claims (10)
1. little oil mass igniting pulverized coal burner; Comprise little oil mass igniter (1) and burner (2); It is characterized in that; Be provided with at least one screen drum (3) in the described burner (2), fill the high-temperature flue gas that the atomized fuel burning back generation of being ejected by little oil mass igniter (1) is arranged in the screen drum (3), get into the interior breeze airflow of burner (2) via the approximate separated into two parts of screen drum (3); Screen drum (3) is cylinder or stage body, has even distribution on its barrel or at the hole slot (4) of barrel one end dense distribution; Little oil mass igniter (1), screen drum (3) and burner (2) coaxial arrangement.
2. little oil mass igniting pulverized coal burner according to claim 1 is characterized in that, is provided with one or two screen drum (3) in the described burner (2).
3. little oil mass igniting pulverized coal burner according to claim 1 is characterized in that, said stage body be the entrance point of breeze airflow than small end, its bigger end is the port of export of breeze airflow.
4. little oil mass igniting pulverized coal burner according to claim 1 is characterized in that, the cross section of described screen drum (3) is any one in circle, ellipse, triangle, square and the polygon.
5. little oil mass igniting pulverized coal burner according to claim 4 is characterized in that described polygon is a regular polygon.
6. little oil mass igniting pulverized coal burner according to claim 5 is characterized in that described regular polygon is a regular pentagon.
7. little oil mass igniting pulverized coal burner according to claim 1 is characterized in that, the through-flow size of said hole slot (4) is not less than the wall thickness of screen drum (3), and its gross area accounts for 5%～50% of screen drum (3) barrel area.
8. little oil mass igniting pulverized coal burner according to claim 1 is characterized in that the outer rim of said hole slot (4) is a closed curve.
9. little oil mass igniting pulverized coal burner according to claim 1 is characterized in that, described hole slot (4) is that any one or the rectangle both sides that circle, rectangle, wedge shape, fan-shaped, circle lack in shape and the polygon are semicircular shape.
10. little oil mass igniting pulverized coal burner according to claim 1 is characterized in that, the fluting direction of described hole slot (4) be parallel or perpendicular to burner axially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101876748A CN102679335A (en) | 2012-06-07 | 2012-06-07 | Tiny-oil ignition pulverized coal combustor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101876748A CN102679335A (en) | 2012-06-07 | 2012-06-07 | Tiny-oil ignition pulverized coal combustor |
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| CN102679335A true CN102679335A (en) | 2012-09-19 |
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| CN2012101876748A Pending CN102679335A (en) | 2012-06-07 | 2012-06-07 | Tiny-oil ignition pulverized coal combustor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62261810A (en) * | 1986-05-09 | 1987-11-14 | Matsushita Electric Ind Co Ltd | Burner |
| CN2248291Y (en) * | 1995-11-24 | 1997-02-26 | 浙江大学 | Contrallable thick and thin separation cyclone burner for combustion of pulverulent fuel |
| JP2005114285A (en) * | 2003-10-09 | 2005-04-28 | Petroleum Energy Center | Burner |
| CN101403497A (en) * | 2008-11-12 | 2009-04-08 | 哈尔滨工业大学 | Micro-oil ignition rotational flow breeze combustion device for preventing slag bonding of primary combustion chamber |
| CN101846315A (en) * | 2009-03-24 | 2010-09-29 | 烟台龙源电力技术股份有限公司 | Coal dust concentration device and coal dust burner with same |
| CN101865459A (en) * | 2010-06-11 | 2010-10-20 | 杭州电子科技大学 | Coking-proof multistage ignition combustion apparatus with self-adaption function |
-
2012
- 2012-06-07 CN CN2012101876748A patent/CN102679335A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62261810A (en) * | 1986-05-09 | 1987-11-14 | Matsushita Electric Ind Co Ltd | Burner |
| CN2248291Y (en) * | 1995-11-24 | 1997-02-26 | 浙江大学 | Contrallable thick and thin separation cyclone burner for combustion of pulverulent fuel |
| JP2005114285A (en) * | 2003-10-09 | 2005-04-28 | Petroleum Energy Center | Burner |
| CN101403497A (en) * | 2008-11-12 | 2009-04-08 | 哈尔滨工业大学 | Micro-oil ignition rotational flow breeze combustion device for preventing slag bonding of primary combustion chamber |
| CN101846315A (en) * | 2009-03-24 | 2010-09-29 | 烟台龙源电力技术股份有限公司 | Coal dust concentration device and coal dust burner with same |
| CN101865459A (en) * | 2010-06-11 | 2010-10-20 | 杭州电子科技大学 | Coking-proof multistage ignition combustion apparatus with self-adaption function |
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Application publication date: 20120919 |