CN204268463U - The W type flame boiler that a kind of outside burner cross dip is adjustable - Google Patents
The W type flame boiler that a kind of outside burner cross dip is adjustable Download PDFInfo
- Publication number
- CN204268463U CN204268463U CN201420733171.0U CN201420733171U CN204268463U CN 204268463 U CN204268463 U CN 204268463U CN 201420733171 U CN201420733171 U CN 201420733171U CN 204268463 U CN204268463 U CN 204268463U
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- Prior art keywords
- air port
- overfire air
- pulverized coal
- governor motion
- cross dip
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- 239000003245 coal Substances 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002817 coal dust Substances 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000001464 adherent effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
The W type flame boiler that outside burner cross dip is adjustable, belongs to technical field of combustion equipment.Technical essential of the present utility model is the first governor motion installed on one to three group pulverized coal channel of both sides outermost for regulating First air coal dust jet to inject burner hearth cross dip, and at one to three group overfire air port of both sides outermost, the second governor motion for regulating Secondary Air to inject burner hearth cross dip is installed, the first governor motion is connected by transmission device with the second governor motion.The angle of inclination that the utility model can regulate outside burner horizontal to the inside according to ruuning situation, thus effectively can alleviate W type flame boiler burner due to along the longer and flow field that causes of stove wide lateral arrangement distance to both walls deflection, flame, to both sides excessive expansion, causes the easy overtemperature of side water wall, slagging scorification and front-back wall water-cooling wall heat flow density problem of non-uniform.
Description
Technical field
The utility model relates to a kind of flame pulverized-coal fired boiler, and particularly a kind of W type flame boiler, belongs to technical field of combustion equipment.
Background technology
W type flame pulverized-coal fired boiler (being called for short W flame boiler) is used widely in anthracitic power station is burnt in China.Be characterized in that the water-cooling wall of lower furnace portion is domes, burner arrangement is on arch, and the First air air-flow carrying coal dust sprays into burner hearth downwards from arch, and then turns back upwards, Secondary Air classification from arch and under arch feeds, and lays the wall with refractory lining, refracto of some at lower hearth.Operative practice shows, W flame boiler has stronger advantage at combustion stability and low-load combustion-stabilizing ability, is conducive to low volatile coal.But during W type flame boiler runs, ubiquity the problem of the easy overtemperature of side water wall, easily slagging scorification, affects the safe and stable operation of whole unit.Occur that the reason of this situation is mainly, on W type flame boiler burner encircles along the wide lateral arrangement of stove in front-back wall, coal dust jet is parallel to side wall and sprays into burner hearth, but the breadth depth ratio of burner hearth is very large, in operation, expand in the fluid field in furnace backward both sides that are heated, and causes outside burner coal dust jet to both sides deflection, near even directly washing away side water wall, cause the easy overtemperature of side water wall, slagging scorification, too increase the inhomogeneities of front-back wall water-cooling wall heat flux distribution simultaneously.
For this problem, the measure taked in prior art mainly contains two kinds, and one adjusts in running, and reduce outside burner output and even close outside burner, this method has open defect, can affect the normal operation of unit; Another introduces adherent wind to protect side water wall pipe at aileron or side wall.As open in: Chinese patent (publication number be CN101050854A, publication date be on May 18th, 2007) a kind of " preventing the W type flame boiler of side wall water cooling wall slagging scorification ", its scheme is by the water screen tube post-tensioning of aileron near sidewall section, spout is formed on side wall both sides, then adherent wind is fed herein by front-back wall bellows, in order to protect side water wall pipe; But this method also exists certain defect, the secondary air flow that side wall feeds is often very little, and momentum is more weak, does not improve the problem that outside burner flame presses close to side wall completely.
Utility model content
The purpose of this utility model is to provide the adjustable W type flame boiler of a kind of outside burner cross dip, make it be in operation and be in the First air spout of outermost burner and encircle the angle that upper overfire air port can adjust its inside lateral inclination as required, thus offset fluid field in furnace to the impact of both sides expansion on outside burner coal dust jet, effectively control the uneven problem of the easy overtemperature of side water wall, slagging scorification and front-back wall water-cooling wall heat flux distribution.
The technical solution of the utility model is as follows:
The W type flame boiler that outside burner cross dip is adjustable, comprises upper furnace, lower hearth, aileron water-cooling wall, side water wall, chimney arch, pulverized coal channel, First air spout and overfire air port; Described pulverized coal channel, First air spout and overfire air port divide many group lateral arrangement on chimney arch, it is characterized in that: install on one to three group pulverized coal channel of both sides outermost for regulating First air coal dust jet to inject burner hearth cross dip θ
1the first governor motion; Install for regulating Secondary Air to inject burner hearth cross dip θ at one to three group overfire air port of both sides outermost
2the second governor motion, the first governor motion is connected by transmission device with the second governor motion.
First governor motion described in the utility model comprises First air spout turning cylinder, low level expansion joint, high-order expansion joint and pulverized coal channel pull bar; First air spout turning cylinder is arranged in First air spout lower end, and low level expansion joint and high-order expansion joint are arranged on pulverized coal channel respectively, and pulverized coal channel pull bar is connected with pulverized coal channel with the second bearing pin respectively by the first bearing pin; Second governor motion comprises overfire air port turning cylinder and overfire air port pull bar, and overfire air port turning cylinder is arranged on overfire air port lower end, and overfire air port pull bar is arranged on overfire air port upper end by the 3rd bearing pin; If the horizontal displacement of pulverized coal channel pull bar is S with the ratio of the horizontal displacement of overfire air port pull bar, the spacing of the second bearing pin and First air spout turning cylinder is L1, and the distance between the 3rd bearing pin and overfire air port turning cylinder is L2, i.e. S=L1/L2.
In technique scheme, angle of inclination is just with deflection angle in the middle of two side direction, cross dip θ
1adjustable range be 0 ° of < θ
1≤ 30 °, cross dip θ
2adjustable range be 0 ° of < θ
2≤ 30 °.
Transmission device described in the utility model comprises motor, driving wheel, the first driven pulley, the second driven pulley, the first gear and the second gear, first driven pulley is connected with driving wheel respectively by belt with the second driven pulley, first gear engages with the tooth bar on pulverized coal channel pull bar, and the second gear engages with the tooth bar on overfire air port pull bar.
The utility model has the following advantages and the technique effect of high-lighting: in 1. running, the pulverized coal channel of one to three group burner of both sides outermost and the upper overfire air port of arch can adjust the angle of its inside lateral inclination as required, offset the impact that fluid field in furnace expands on outside burner coal dust jet to both sides, the easy overtemperature of effective suppression side water wall, clogging problems, and improve the heat flux distribution of front-back wall water-cooling wall; 2. regulate in this way, without the need to changing exerting oneself of burner, less to influence on system operation; Choose suitable inclined angle according to inner side burner ruuning situation, the impact on inner side burner can be avoided; 3. after the inside lateral inclination of burner nozzle, coal dust jet stroke can increase to some extent, can increase coal dust after-flame degree.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram (front view) of a kind of W type flame boiler that the utility model provides.
Fig. 2 is mounted in the structural representation of the first governor motion on pulverized coal channel.
Fig. 3 is mounted in the structural representation of the second governor motion on overfire air port.
Fig. 4 is the structural representation of transmission device.
In figure: 1-burner; 2-upper furnace; The high-order expansion joint of 3-; 4-pulverized coal channel; 5-low level expansion joint; 6-pulverized coal channel pull bar; 7-First air spout; 8-First air spout turning cylinder; 9-aileron water-cooling wall; 10-lower hearth; 11-side water wall; 12-overfire air port; 13-chimney arch; 14-overfire air port pull bar; 15-overfire air port turning cylinder; The fixed overfire air port of 16-; 17-first bearing pin; 18-second bearing pin; 19-the 3rd bearing pin; 20-driving wheel; 21-first gear; 22-first driven pulley; 23-second gear; 24-second driven pulley; 25-motor output shaft; 26-driving belt.
Detailed description of the invention
Below in conjunction with accompanying drawing, structure of the present utility model, principle and detailed description of the invention are described further.
See Fig. 1, the W type flame boiler that a kind of outside burner cross dip that the utility model provides is adjustable, comprise upper furnace 2, lower hearth 10, aileron water-cooling wall 9, side water wall 11, chimney arch 13, pulverized coal channel 4, First air spout 7 and overfire air port 12, wherein pulverized coal channel 4, First air spout 7 and overfire air port organize lateral arrangement on chimney arch 13 more 12 points; One to three group pulverized coal channel 4 of both sides outermost is installed for regulating First air coal dust jet to inject burner hearth cross dip θ
1the first governor motion; Install for regulating Secondary Air to inject burner hearth cross dip θ at one to three group overfire air port 12 of both sides outermost
2the second governor motion, the first governor motion is connected by transmission device with the second governor motion.Angle of inclination is just with deflection angle in the middle of two side direction, cross dip θ
1adjustable range be 0 ° of < θ
1≤ 30 °, cross dip θ
2adjustable range be 0 ° of < θ
2≤ 30 °.
As shown in Figure 2 and Figure 3, the first governor motion comprises First air spout turning cylinder 8, low level expansion joint 5, high-order expansion joint 3 and pulverized coal channel pull bar 6; First air spout turning cylinder 8 is arranged in First air spout 7 lower end, and low level expansion joint 5 and high-order expansion joint 3 are arranged on pulverized coal channel 4 respectively, and pulverized coal channel pull bar 6 is connected with pulverized coal channel 4 with the second bearing pin 18 respectively by the first bearing pin 17; Second governor motion comprises overfire air port turning cylinder 15 and overfire air port pull bar 14, and overfire air port turning cylinder 15 is arranged on overfire air port 12 lower end, and overfire air port pull bar 14 is arranged on the upper end of overfire air port by the 3rd bearing pin 19.
Fig. 4 is the structural representation of transmission device, described transmission device comprises motor, driving wheel 20, first driven pulley 22, second driven pulley 24, first gear 21 and the second gear 23, first driven pulley 22 is connected with driving wheel 20 respectively by belt 26 with the second driven pulley 24, first gear 21 engages with the tooth bar on pulverized coal channel pull bar 6, and the second gear 23 engages with the tooth bar on overfire air port pull bar 14.
Operation principle of the present utility model and the course of work as follows:
Breeze airflow is injected in burner hearth from arch, after turn back upwards; Near outside one to the three group burner of both walls water-cooling wall 11, under the pulling of pulverized coal channel pull bar 6 and overfire air port pull bar 14, breeze airflow can lateral inclination certain angle θ in the width direction
1enter burner hearth, the impact that fluid field in furnace expands on outside burner coal dust jet to both sides can be offset, effectively suppress the easy overtemperature of side water wall, clogging problems.Burner 1 in the middle part of burner hearth and fixed overfire air port 16 are still arranged on arch with vertical direction.Be adjusted to example with outermost one group of burner lateral angles, composition graphs 2-4 illustrates the embodiment that pulverized coal channel 4 and overfire air port 12 lateral angles regulate.Motor output shaft 25 drives driving wheel 20 to rotate, the first driven pulley 22 simultaneously driving radius identical by driving belt 26 and the second driven pulley 24 rotate, first driven pulley 22 and the first gear 21 are on same axis, on second driven pulley 24 and the second gear 23 same axis, therefore the first gear 21 is identical with the second gear 23 angular speed, pulverized coal channel pull bar 6 is driven to move horizontally by rack pinion while first gear 21 drives rotation by the first driven pulley 22, overfire air port pull bar 14 is driven to move horizontally by rack pinion while second gear 23 drives rotation by the second driven pulley 24, the ratio of the first gear 21 and the second gear 23 radius is the ratio of the same length L2 between 3rd bearing pin 19 and overfire air port turning cylinder 15 of length L1 between the second bearing pin 18 and First air spout turning cylinder 8, so the horizontal displacement L water of pulverized coal channel pull bar 6 and the horizontal displacement L4 of overfire air port pull bar 14 ratio S also to equal between the second bearing pin 18 and First air spout turning cylinder 8 length L1 all the time with the ratio of length L2 between the 3rd bearing pin 19 and overfire air port turning cylinder 15.First air spout 7 is pulled to rotate around First air spout turning cylinder 8 by the second bearing pin 18 after pulverized coal channel pull bar 6 moves horizontally, the radius of gyration is length L1 between the second bearing pin 18 and First air spout turning cylinder 8, First air spout 7 upper end is connected with pulverized coal channel 4 by low level expansion joint 5, and pulverized coal channel 4 upper end is connected with swingable burner 1 by high-order expansion joint 3; Pull overfire air port 12 to rotate around overfire air port turning cylinder 15 by the 3rd bearing pin 19 after overfire air port pull bar 14 moves horizontally, the radius of gyration is length L between the 3rd bearing pin 19 and overfire air port turning cylinder 15
2.The cross dip θ of First air spout 7
1equal arcsin (L '/L1), the cross dip θ of overfire air port 12
2equal arcsin (L "/L2), due to L '/L "=L1/L2, so the cross dip θ of First air spout 7
1all the time the cross dip θ of swingable overfire air port 12 is equaled
2.By the adjustment of pulverized coal channel 4 and overfire air port 12 cross dip, realizing outside burner coal dust jet is that certain angle is injected to burner hearth center position in transverse direction and vertical direction, offset the impact that fluid field in furnace expands on outside burner coal dust jet to both sides, there is overtemperature, slagging scorification in effective control side water wall, and improves the heat flux distribution of front-back wall water-cooling wall.
Claims (4)
1. the W type flame boiler that outside burner cross dip is adjustable, comprises upper furnace (2), lower hearth (10), aileron water-cooling wall (9), side water wall (11), chimney arch (13), pulverized coal channel (4), First air spout (7) and overfire air port (12); Described pulverized coal channel, First air spout and overfire air port divide many group lateral arrangement on chimney arch (13), it is characterized in that: in the upper installation of one to three group pulverized coal channel (4) of both sides outermost for regulating First air coal dust jet to inject burner hearth cross dip θ
1the first governor motion; Install for regulating Secondary Air to inject burner hearth cross dip θ at one to three group overfire air port (12) of both sides outermost
2the second governor motion, the first governor motion is connected by transmission device with the second governor motion.
2. the W type flame boiler that a kind of outside according to claim 1 burner cross dip is adjustable, is characterized in that: the first governor motion comprises First air spout turning cylinder (8), low level expansion joint (5), high-order expansion joint (3) and pulverized coal channel pull bar (6); First air spout turning cylinder (8) is arranged in First air spout (7) lower end, low level expansion joint (5) and high-order expansion joint (3) are arranged on pulverized coal channel (4) respectively, and pulverized coal channel pull bar (6) is connected with pulverized coal channel (4) with the second bearing pin (18) respectively by the first bearing pin (17); Second governor motion comprises overfire air port turning cylinder (15) and overfire air port pull bar (14), overfire air port turning cylinder (15) is arranged on overfire air port (12) lower end, and overfire air port pull bar (14) is arranged on overfire air port (12) upper end by the 3rd bearing pin (19);
If the ratio of the horizontal displacement of the horizontal displacement of pulverized coal channel pull bar (6) and overfire air port pull bar (14) is S, second bearing pin (18) is L1 with the spacing of First air spout turning cylinder (8), distance between 3rd bearing pin (19) and overfire air port turning cylinder (15) is L2, i.e. S=L1/L2.
3. the W type flame boiler that a kind of outside according to claim 1 and 2 burner cross dip is adjustable, is characterized in that: angle of inclination is just with deflection angle in the middle of two side direction, cross dip θ
1adjustable range be 0 ° of < θ
1≤ 30 °, cross dip θ
2adjustable range be 0 ° of < θ
2≤ 30 °.
4. the W type flame boiler that a kind of outside according to claim 1 and 2 burner cross dip is adjustable, it is characterized in that: described transmission device comprises motor, driving wheel (20), first driven pulley (22), second driven pulley (24), first gear (21) and the second gear (23), first driven pulley (22) is connected with driving wheel (20) respectively by belt (26) with the second driven pulley (24), first gear (21) engages with the tooth bar on pulverized coal channel pull bar (6), second gear (23) engages with the tooth bar on overfire air port pull bar (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420733171.0U CN204268463U (en) | 2014-11-27 | 2014-11-27 | The W type flame boiler that a kind of outside burner cross dip is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420733171.0U CN204268463U (en) | 2014-11-27 | 2014-11-27 | The W type flame boiler that a kind of outside burner cross dip is adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204268463U true CN204268463U (en) | 2015-04-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420733171.0U Withdrawn - After Issue CN204268463U (en) | 2014-11-27 | 2014-11-27 | The W type flame boiler that a kind of outside burner cross dip is adjustable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204268463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456536A (en) * | 2014-11-27 | 2015-03-25 | 清华大学 | W-shaped flame boiler with lateral inclination angles of outer-side combustors adjustable |
-
2014
- 2014-11-27 CN CN201420733171.0U patent/CN204268463U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456536A (en) * | 2014-11-27 | 2015-03-25 | 清华大学 | W-shaped flame boiler with lateral inclination angles of outer-side combustors adjustable |
| CN104456536B (en) * | 2014-11-27 | 2017-05-17 | 清华大学 | W-shaped flame boiler with lateral inclination angles of outer-side combustors adjustable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150415 Effective date of abandoning: 20170517 |
|
| AV01 | Patent right actively abandoned |