CN103307596A - Spandrel combustor for W-shaped flame boiler - Google Patents
Spandrel combustor for W-shaped flame boiler Download PDFInfo
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- CN103307596A CN103307596A CN2013102442384A CN201310244238A CN103307596A CN 103307596 A CN103307596 A CN 103307596A CN 2013102442384 A CN2013102442384 A CN 2013102442384A CN 201310244238 A CN201310244238 A CN 201310244238A CN 103307596 A CN103307596 A CN 103307596A
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Abstract
The invention discloses a spandrel combustor for a W-shaped flame boiler, which relates to a spandrel combustor, and aims to solve the problems that a conventional W-shaped flame boiler device is large in spandrel downstream gas flowing amount, high in rigidity and overlarge in spraying depth, coal ash gas flow cannot be quickly dispersed after being on fire, the center position of flame is downward, the main steam temperature and the reheated steam temperature are low, and the unit power generation efficiency is low. The spandrel combustor comprises a front wall, a rear wall, a wing wall and a side wall, wherein the front wall, the rear wall, the wing wall and the side wall form a combustion cavity together; the front wall and the rear wall are respectively provided with a ledge; the ledges of the front wall and the rear wall are respectively provided with a row of combustion nozzles; each row of combustion spraying ports comprise a plurality of groups of injection nozzles which are arranged side by side at equal intervals; a distance between every two adjacent groups of injection nozzles is 1.4m-1.8 m. The spandrel combustor is applied to the W-shaped flame boiler.
Description
Technical field
The present invention relates to burner on a kind of arch, be specifically related to a kind ofly for burner on the arch of W type flame boiler, belong to the boiler combustion technology field.
Background technology
W type flame boiler is a kind of boiler that uses anthracite and colm specially and design, and difficultly has remarkable advantages aspect coal-fired using for other type of furnaces, as has the long coal dust time of staying and have good aerodynamic field.Obtained extensive use in China at present, total installation of generating capacity has reached 41000MW.The W type flame boiler combustion technology of China is found the following problem of W type flame boiler ubiquity: the high 1600-1800mg/m of NOx discharge capacity mainly from external introduction in actual motion
3, unburned combustible in fly ash height, lower hearth front wall and rear water wall slagging scorification be serious.According to " thermal power plant's atmosphere pollutants emission standards " the up-to-date promulgation of China, that will begin to carry out on July 1st, 2014 (GB13223-2011), the highest permission concentration of emission of W type flame boiler NOx be 200mg/m
3, thereby when carrying out the afterbody denitration, W type flame boiler also must be organized low NOx combustion in the stove.Open day is on September 15th, 2010, application number 201010149634.5, the applying date is on April 19th, 2010, application name is called: the method for multi-ejection grading combustion and realize that " multi-ejection grading combustion technology " that the Chinese invention patent of the W flame boiler apparatus of this method elaborates solved the problem of above-mentioned appearance substantially, but find that in actual moving process existing W flame boiler apparatus arch up-downgoing air-flow momentum is big, rigidity is strong, under to penetrate the degree of depth excessive, breeze airflow can not spread rapidly after catching fire, cause flame central position on the lower side, cause main steam temperature and reheat steam temperature degree on the low side, the problem that unit generation efficient is on the low side.
Summary of the invention
The objective of the invention is that existing W flame boiler apparatus arch up-downgoing air-flow momentum is big, rigidity is strong in order to solve, under to penetrate the degree of depth excessive, breeze airflow can not spread rapidly after catching fire, cause flame central position on the lower side, cause main steam temperature and reheat steam temperature degree on the low side, the problem that unit generation efficient is on the low side.And then provide a kind of for burner on the arch of W type flame boiler.
Technical scheme of the present invention is: a kind ofly comprise front wall, Hou Qiang, aileron and side wall for burner on the arch of W type flame boiler, front wall, Hou Qiang, aileron and side wall surround combustion chamber jointly, described front wall and Hou Qiang are the front wall that has shoulder and have the back wall of shoulder, be respectively equipped with row's burning spout on the shoulder of front wall and back wall, every row spout that burns comprises many group injection spouts, length direction along front wall and back wall between many group injection spouts equidistantly is set up in parallel, and the distance between the two adjacent groups injection spout is 1.4m-1.8m.
The present invention compared with prior art has following effect:
1. the setting by spout of the present invention, make the furnace flame center rise to the lower hearth bottom by original furnace hopper upper position, main steam temperature and again the steaming stripping temperature be elevated to 571 ℃ and 569 ℃, reach boiler main steam and the design standard of hot vapour again, unit generation efficient has improved 41% before transforming, and average single electric coal consumption drops to the 310g standard coal.Only improve unit generation efficient and just can save 6.74 ten thousand tons of standard coals for country this every year.Furnace flame no longer washes away the water-cooling wall in the furnace hopper simultaneously, and " heat fatigue " phenomenon no longer appears in the water-cooling wall of furnace hopper inside, has guaranteed the safe operation of boiler.
2. the present invention is simple in structure, and is easy to use.
Description of drawings
Fig. 1 is the integrally-built schematic diagram of the present invention; Fig. 2 is the vertical view of Fig. 1; Fig. 3 is the structural representation of one group of injection spout.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1-Fig. 3, present embodiment comprises front wall 1, back wall 2, aileron 3 and side wall 12, front wall 1, back wall 2, aileron 3 and side wall 12 surround combustion chamber jointly, described front wall 1 and back wall 2 are the front wall 1 that has shoulder and the back wall 2 that has shoulder, be respectively equipped with row's burning spout 4 on the shoulder of front wall 1 and back wall 2, every row spout 4 that burns comprises many group injection spouts 5, length direction along front wall 1 and back wall 2 between many group injection spouts 5 equidistantly is set up in parallel, and the distance between the two adjacent groups injection spout 5 is 1.4m-1.8m.
The shoulder of the front wall 1 of present embodiment and back wall 2 is respectively the shoulder of both sides inclination to the left and right.
The present invention proposes to be provided with two row's burning spouts at the chimney arch of first body of wall and second body of wall, change two present row's burning spouts into by original row's burning spout, every row is burnt and is left distance at the combustion chamber width between many groups injection spout of spout, be conducive to the diffusion of breeze airflow more, the rate of decay of air-flow integral body is accelerated; Simultaneously compared with prior art, single group injection spout quantity reduces, but the total spout quantity of burning spout increases, thick coal culm, thin powdered coal, the gross area of inside and outside overfire air port all increases to some extent, therefore reduced the speed of deep or light air-flow and inside and outside secondary wind, the momentum that sprays into the air-flow of burner hearth by single group injection spout reduced 35% more originally, the reduced stiffness of arch up-downgoing air-flow, the speed of secondary general mood stream also reduces owing to encircle down simultaneously, injection effect to arch up-downgoing breeze airflow weakens, the following degree of depth of penetrating of arch overdraught reduces, the corresponding rising of flame central position in the combustion chamber.And the height of flame central position directly influences flue gas temperature of hearth outlet in the combustion chamber, and the entrance flue gas temperature of convection heating surface and heat exchange effect are closely related, and particularly reheater is subjected to the influence of furnace flame center bigger near the combustion chamber outlet.Therefore, the furnace flame position raises, and the heat exchange effect of convection heating surface strengthens, and the temperature of main steam raises naturally, and the temperature of hot vapour also raises again, has improved unit generation efficient; Because penetrate reducing of the degree of depth under the arch up-downgoing air-flow, flame no longer washes away the water screen tube in the furnace hopper in the burner hearth, can not occur the phenomenon of heat fatigue naturally, prolong the service life of water screen tube greatly, also guaranteed the safe operation of boiler simultaneously.
The specific embodiment two: in conjunction with Fig. 2 and Fig. 3 present embodiment is described, the quantity of many groups injection spout 5 of present embodiment is 12.So arrange, be conducive to the diffusion of breeze airflow more, the rate of decay of air-flow integral body is accelerated.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment three: present embodiment is described in conjunction with Fig. 2 and Fig. 3, every group of injection spout 5 of present embodiment comprises a plurality of wind snouts 6, a plurality of oil secondary air spouts 7, overfire air port 8 in a plurality of, a plurality of weary gas blowout mouths 9 and outer overfire air port 10, a plurality of wind snouts 6, overfire air port 8 and a plurality of weary gas blowout mouth 9 are successively and equidistantly are set up in parallel along the length direction of front wall 1 with back wall 2 in a plurality of, a plurality of oil secondary air spouts 7 are symmetricly set on the both sides of a plurality of wind snouts 6, a plurality of interior overfire air ports 8, a plurality of weary gas blowout mouths 9 and outer overfire air port 10 from top to bottom be successively set on a plurality of wind snouts 6 under.So arrange, the thick coal culm air-flow sprays into combustion chamber by the thick coal culm spout, a wind wind speed is 15-20m/s, interior secondary wind sprays into combustion chamber by interior overfire air port, interior secondary wind wind speed is 30-40m/s, the thin powdered coal air-flow sprays into combustion chamber by the thin powdered coal spout, outer secondary wind sprays into burner hearth by outer overfire air port, secondary wind wind speed is 30-40m/s, the thick coal culm air-flow is realization first order fractional combustion under the injection step by step of interior secondary wind and outer secondary wind, the arch speed of secondary wind down is 20-30m/s, sprayed into the breeze airflow of the further injection arch of combustion chamber up-downgoing by overfire air port under a plurality of arches that are arranged in down on the combustion chamber front-back wall water-cooling wall, realize second level fractional combustion, overfire air port and horizontal angle are 20 °-45 ° on the arch.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment four: in conjunction with Fig. 3 present embodiment is described, the quantity of a plurality of wind snouts 6 of present embodiment, a plurality of interior overfire air ports 8 and a plurality of weary gas blowout mouths 9 is 3, and the quantity of a plurality of oil secondary air spouts 7 is 2.So arrange, be conducive to breeze airflow more in the back diffusion of catching fire, and the spout quantity of single group injection spout 5 of the present invention reduces, make single injection spout 5 spray into ratio of momentum prior art little of combustion chamber air-flow, the rigidity of arch up-downgoing air-flow also weakens thereupon, simultaneously along with arch little than prior art of the speed of secondary general mood stream down, corresponding the weakening of injection effect to arch up-downgoing breeze airflow, the following degree of depth of penetrating of arch overdraught reduces, the corresponding rising of flame central position in the combustion chamber, main steam temperature and reheat steam temperature degree raise, and unit efficiency improves.And owing to penetrate reducing of the degree of depth under the arch up-downgoing air-flow, avoided the combustion chamber interior flame that the water screen tube in the furnace hopper is washed away.Other composition is identical with the specific embodiment three with annexation.
The specific embodiment five: in conjunction with Fig. 2 and Fig. 3 present embodiment is described, the shape of many groups spout of present embodiment is rectangle or circle.So arrange, be convenient to manufacture.Other composition is identical with the specific embodiment four with annexation.
The specific embodiment six: in conjunction with Fig. 1 present embodiment is described, the bottom of the combustion chamber of present embodiment is lower hearth, and the corresponding section, burner hearth position, width up and down of front wall 1 and back wall 2 tilts to be provided with row's arch overfire air port 11 down respectively.So arrange, breeze airflow can spread rapidly after catching fire, and flame central position rises, and has avoided main steam temperature and reheat steam temperature degree problem on the low side; Avoid the phenomenon of the water screen tube generation heat fatigue in the furnace hopper, and the booster phenomenon, water screen tube prolongs service life, has guaranteed the long-term safety operation of boiler.Other composition is identical with the specific embodiment five with annexation.
The specific embodiment seven: in conjunction with Fig. 1 present embodiment is described, the angle of overfire air port 11 and horizontal plane is 20 °-45 ° and sprays into burner hearth downwards under the arch of present embodiment.So arrange, realized the second level fractional combustion of coal dust.Other composition is identical with the specific embodiment six with annexation.
Claims (7)
1. one kind is used for burner on the arch of W type flame boiler, it comprises front wall (1), back wall (2), aileron (3) and side wall (12), front wall (1), back wall (2), aileron (3) and side wall (12) surround combustion chamber jointly, it is characterized in that: described front wall (1) and back wall (2) are the front wall (1) that has shoulder and the back wall (2) that has shoulder, be respectively equipped with row's burning spout (4) on the shoulder of front wall (1) and back wall (2), every row spout (4) that burns comprises many group injection spouts (5), equidistantly be set up in parallel between many group injection spouts (5), the distance between the two adjacent groups injection spout (5) is 1.4m-1.8m.
2. according to claim 1 a kind of for burner on the arch of W type flame boiler, it is characterized in that: the quantity of described many group injection spouts (5) is 12.
3. according to claim 1 and 2 a kind of for burner on the arch of W type flame boiler, it is characterized in that: every group of injection spout (5) comprises a plurality of wind snouts (6), a plurality of oil secondary air spouts (7), overfire air port (8) in a plurality of, a plurality of weary gas blowout mouths (9) and outer overfire air port (10), a plurality of wind snouts (6), in a plurality of overfire air ports (8) and a plurality of weary gas blowout mouths (9) be successively along front wall (1) and afterwards the length direction of wall (2) equidistantly be set up in parallel, a plurality of oil secondary air spouts (7) are symmetricly set on the both sides of a plurality of wind snouts (6), a plurality of interior overfire air ports (8), a plurality of weary gas blowout mouths (9) and outer overfire air port (10) from top to bottom be successively set on a plurality of wind snouts (6) under.
4. according to claim 3 a kind of for burner on the arch of W type flame boiler, it is characterized in that: the quantity of described a plurality of wind snouts (6), a plurality of interior overfire air port (8) and a plurality of weary gas blowout mouths (9) is 3, and the quantity of a plurality of oil secondary air spouts (7) is 2.
5. according to claim 4 a kind of for burner on the arch of W type flame boiler, it is characterized in that: the shape of described many group injection spouts (5) is rectangle or circle.
6. according to claim 1,2,4 or 5 described a kind of for burner on the arch of W type flame boiler, it is characterized in that: the bottom of described combustion chamber is lower hearth, and the corresponding section, burner hearth position, width up and down of front wall (1) and back wall (2) tilts to be provided with row's arch overfire air port (11) down respectively.
7. according to claim 6 a kind of for burner on the arch of W type flame boiler, it is characterized in that: overfire air port under the described arch (11) is 20 °-45 ° with the angle of horizontal plane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310244238.4A CN103307596B (en) | 2013-06-19 | 2013-06-19 | Spandrel combustor for W-shaped flame boiler |
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| CN201310244238.4A CN103307596B (en) | 2013-06-19 | 2013-06-19 | Spandrel combustor for W-shaped flame boiler |
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| CN103307596A true CN103307596A (en) | 2013-09-18 |
| CN103307596B CN103307596B (en) | 2015-07-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423294A (en) * | 2015-12-28 | 2016-03-23 | 哈尔滨工业大学 | Secondary air offset whirl pulverized coal burner for W flame boiler |
| CN105546521A (en) * | 2015-12-28 | 2016-05-04 | 哈尔滨工业大学 | W-flame boiler with rotational flow pulverized coal burners with primary air and secondary air eccentrically arranged |
| CN109945168A (en) * | 2019-03-11 | 2019-06-28 | 哈尔滨工业大学 | A kind of W flame boiler of front wall, the rear asymmetrical arrangement of wall lack of gas |
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| US4381718A (en) * | 1980-11-17 | 1983-05-03 | Carver George P | Low emissions process and burner |
| CN101368725A (en) * | 2008-09-27 | 2009-02-18 | 哈尔滨工业大学 | Stable combustion anti-slag gap type W-shaped flame boiler apparatus |
| CN101476719A (en) * | 2009-01-21 | 2009-07-08 | 哈尔滨工业大学 | Combustion device with thin and thick breeze airflow stagger arrangement used for W-shaped flame furnace |
| CN101832549A (en) * | 2010-04-19 | 2010-09-15 | 哈尔滨工业大学 | Multi-ejection grading combustion method and W flame boiler device for realizing same |
| CN102297420A (en) * | 2011-08-15 | 2011-12-28 | 哈尔滨工业大学 | Ejecting staged combustion W-flame boiler with thin pulverized coal air flow drawn to bottom |
| CN102297418A (en) * | 2011-08-12 | 2011-12-28 | 哈尔滨工业大学 | Thick and thin pulverized coal nozzle interlacedly arranged W-flame boiler with multiple ejections and staged combustion |
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2013
- 2013-06-19 CN CN201310244238.4A patent/CN103307596B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4381718A (en) * | 1980-11-17 | 1983-05-03 | Carver George P | Low emissions process and burner |
| CN101368725A (en) * | 2008-09-27 | 2009-02-18 | 哈尔滨工业大学 | Stable combustion anti-slag gap type W-shaped flame boiler apparatus |
| CN101476719A (en) * | 2009-01-21 | 2009-07-08 | 哈尔滨工业大学 | Combustion device with thin and thick breeze airflow stagger arrangement used for W-shaped flame furnace |
| CN101832549A (en) * | 2010-04-19 | 2010-09-15 | 哈尔滨工业大学 | Multi-ejection grading combustion method and W flame boiler device for realizing same |
| CN102297418A (en) * | 2011-08-12 | 2011-12-28 | 哈尔滨工业大学 | Thick and thin pulverized coal nozzle interlacedly arranged W-flame boiler with multiple ejections and staged combustion |
| CN102297420A (en) * | 2011-08-15 | 2011-12-28 | 哈尔滨工业大学 | Ejecting staged combustion W-flame boiler with thin pulverized coal air flow drawn to bottom |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105423294A (en) * | 2015-12-28 | 2016-03-23 | 哈尔滨工业大学 | Secondary air offset whirl pulverized coal burner for W flame boiler |
| CN105546521A (en) * | 2015-12-28 | 2016-05-04 | 哈尔滨工业大学 | W-flame boiler with rotational flow pulverized coal burners with primary air and secondary air eccentrically arranged |
| CN105546521B (en) * | 2015-12-28 | 2017-11-03 | 哈尔滨工业大学 | The W flame boiler of vortex burner primary and secondary air arranged off-centre |
| CN109945168A (en) * | 2019-03-11 | 2019-06-28 | 哈尔滨工业大学 | A kind of W flame boiler of front wall, the rear asymmetrical arrangement of wall lack of gas |
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| CN103307596B (en) | 2015-07-15 |
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