CN202132971U - Secondary air arrangement structure of W flame boiler - Google Patents
Secondary air arrangement structure of W flame boiler Download PDFInfo
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- CN202132971U CN202132971U CN201120188381U CN201120188381U CN202132971U CN 202132971 U CN202132971 U CN 202132971U CN 201120188381 U CN201120188381 U CN 201120188381U CN 201120188381 U CN201120188381 U CN 201120188381U CN 202132971 U CN202132971 U CN 202132971U
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- air port
- overfire air
- secondary air
- guide plate
- boiler
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Abstract
The utility model provides a secondary air arrangement structure of a W flame boiler. First, second, third secondary air nozzles are disposed at a furnace arch of the boiler. Fourth, fifth and sixth secondary air nozzles are disposed at a vertical section of the boiler from top to bottom. A seventh secondary air nozzle is disposed on an inclined plane of a cold ash hopper of a hearth. The fourth secondary air nozzle is provided with a first guide plate, and the seventh secondary air nozzle is provided with a second guide plate. The secondary air arrangement structure is advantageous in that the secondary air nozzle is provided with a guide plate, changing the incidence angle of the secondary air; when the hearth is under high load, a first air route can be effectively prolonged by adjusting the incidence angle of the secondary air; the problems of air supplement difficulty and screen overtemperature can be resolved; the amount of temperature-reducing water can be reduced, and the loss due to incomplete combustion of solid can be decreased.
Description
Technical field
The utility model relates to a kind of secondary wind arrangement of W flame boiler.
Background technology
The W flame boiler is a kind of special in using the type of furnace that low volatile coals such as anthracite design, and it can adapt to the fundamental realities of the country that China's power plant soot is mainly coals inferior such as anthracite, meager coal, widely applies in China at present.But in the W type flame station boiler of China operation ubiquity that fire box temperature control is too high, burner hearth slagging scorification or ash deposition propensity is serious, NOx discharged problems such as high.One of its reason is that air distribution operating mode in service is bad, causes that flame is adherent, the not enough coal dust of oxygen supply can't fully burn, the long furnace hopper that washes away of the length of flame, and the burner hearth anoxic, ash dissolves point and declines to a great extent and bring out coking, accumulated slag.Most in addition secondary wind concentrate on arch down; Thereby arch leeward momentum is very big, blocks the descending route of the last breeze airflow of arch when level is blown into burner hearth, causes a breeze airflow to fracture in advance; Stroke shortens coal dust in the furnace high-temperature district, is unfavorable for the after-flame of coal dust.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned defective, and a kind of secondary wind arrangement of W flame boiler is provided, and improves the air distribution situation, is convenient to the after-flame of coal dust.
In order to achieve the above object; The utility model provides a kind of secondary wind arrangement of W flame boiler; Comprise first overfire air port, second overfire air port, the 3rd overfire air port, the 4th overfire air port, the 5th overfire air port, the 6th overfire air port and the 7th overfire air port; First overfire air port, second overfire air port, the 3rd overfire air port are arranged at the chimney arch position of boiler, and the 4th overfire air port, the 5th overfire air port and the 6th overfire air port are successively set on the vertical section of boiler from top to bottom; The 7th overfire air port is arranged on the inclined-plane of burner hearth furnace hopper; It is characterized in that described the 4th overfire air port is provided with first guide plate, described the 7th overfire air port is provided with second guide plate.
Preferably, the adjustable-angle of described first guide plate is downward 0 °～25 ° an of level, and the adjustable-angle of second guide plate is horizontal direction ± 15 °.
Preferably, the inlet pipeline place of described first overfire air port, second overfire air port, the 3rd overfire air port, the 4th overfire air port, the 5th overfire air port, the 6th overfire air port and the 7th overfire air port all is provided with the air quantity controllable register.
The beneficial effect of the utility model is:
1, is provided with guide plate at the overfire air port place, to change the incident angle of secondary wind at this.When burner hearth is in high load capacity, through adjustment secondary wind incident angle Cheng Youxiao in fashion is prolonged, solve the problem of mending the wind difficulty, shielding overtemperature, also can reduce the desuperheating water consumption, the incomplete combustion loss of reduction solid.
2, in secondary wind at different levels controllable register is set all; Can be according to the increase and decrease of boiler load; In increase and decrease fuel (coal dust), increase and decrease the size and the distribution of vertical brattice windward amount that the air quantity of sending into changes annular secondary air flow around the main injection jet in proportion, thus the shape of change flame travel and expansion.
3, on furnace hopper overfire air port is set; Can weaken arch secondary wind momentum down through controllable register in case of necessity, effectively replenish the oxygen amount of burner hearth bottom anoxic zones, a breeze airflow just can further go deep into burner hearth; Prolong the stroke of coal dust in stove, promote the coal dust after-flame.
4, a part of secondary wind is infeeded burner hearth from arch,, thereby effectively suppress the generation of NOx so that burning all is in the reducing atmosphere of anoxic under the arch.
Description of drawings
Fig. 1 is the secondary wind arrangement sketch map of W flame boiler;
Fig. 2 is the guide board structure sketch map.
The specific embodiment
Specify the utility model below in conjunction with embodiment.
Embodiment
As shown in Figure 1; Secondary wind arrangement sketch map for the W flame boiler; Comprise first overfire air port 1, second overfire air port 2, the 3rd overfire air port 3, the 4th overfire air port 4, the 5th overfire air port 5, the 6th overfire air port 6 and the 7th overfire air port 7; First overfire air port 1, second overfire air port 2, the 3rd overfire air port 3 are arranged at the chimney arch position of boiler; The 4th overfire air port 4, the 5th overfire air port 5 and the 6th overfire air port 6 are successively set on the vertical section of boiler from top to bottom, and the 7th overfire air port 7 is arranged on the inclined-plane of burner hearth furnace hopper 12, it is characterized in that; Described the 4th overfire air port 4 is provided with first guide plate 9, and described the 7th overfire air port 7 is provided with second guide plate 10.The adjustable-angle of described first guide plate 9 is downward 0 °～25 ° an of level, and the adjustable-angle of second guide plate 10 is horizontal direction ± 15 °.The inlet pipeline place of described first overfire air port 1, second overfire air port 2, the 3rd overfire air port 3, the 4th overfire air port 4, the 5th overfire air port 5, the 6th overfire air port 6 and the 7th overfire air port 7 all is provided with air quantity controllable register 11.The structure of described first guide plate 9 and second guide plate 10 is as shown in Figure 2.The chimney arch position of described boiler also is provided with breeze airflow spout 1.
Under the constant situation of total secondary air flow, through regulating air quantity controllable register 11, can be according to the situation of change of different coals and load, flexible sprays into the secondary wind air quantity at different levels of burner hearth, effectively adjusts combustion centre.When level sprays into the secondary air flow of burner hearth when excessive, can reduce of the disturbance of horizontal secondary wind through opening the 5th overfire air port 5 on the furnace hopper with pulverized coal flow, strengthen combustion stability.Through regulating first guide plate 9; Can be according to the air distribution operating mode in the actual motion, the secondary wind of the 4th overfire air port 4 is tilted from the horizontal downwards, postponed mixing of breeze airflow and arch time secondary wind on the one hand; Make coal dust be in hypoxia for a long time, can suppress the generation of NOx; On the other hand, after secondary wind was mixed at a breeze airflow with under encircleing, coal dust can further go deep into burner hearth downwards under secondary wind is carried, prolonged the time of staying of coal dust in the furnace high-temperature district, promotes the after-flame of coal dust.Equally also can regulate second guide plate 10 when needed, to alleviate the phenomenon of lower furnace portion oxygen quantity not sufficient.
Adopt this structure, various regulating measures will change according to ature of coal regulates, and can successfully realize the efficient low NOx combustion of unburnable coal.Can satisfy simultaneously preventing the slagging scorification requirement, have good economic benefits, environmental benefit and social benefit.
Claims (3)
1. the secondary wind arrangement of a W flame boiler; Comprise first overfire air port (1), second overfire air port (2), the 3rd overfire air port (3), the 4th overfire air port (4), the 5th overfire air port (5), the 6th overfire air port (6) and the 7th overfire air port (7); First overfire air port (1), second overfire air port (2), the 3rd overfire air port (3) are arranged at the chimney arch position of boiler; The 4th overfire air port (4), the 5th overfire air port (5) and the 6th overfire air port (6) are successively set on the vertical section of boiler from top to bottom; The 7th overfire air port (7) is arranged on the inclined-plane of burner hearth furnace hopper (12); It is characterized in that; Described the 4th overfire air port (4) is provided with first guide plate (9), and described the 7th overfire air port (7) is provided with second guide plate (10).
2. the secondary wind arrangement of W flame boiler as claimed in claim 1 is characterized in that, the adjustable-angle of described first guide plate (9) is downward 0 °～25 ° an of level, and the adjustable-angle of second guide plate (10) is horizontal direction ± 15 °.
3. the secondary wind arrangement of W flame boiler as claimed in claim 1; It is characterized in that the inlet pipeline place of described first overfire air port (1), second overfire air port (2), the 3rd overfire air port (3), the 4th overfire air port (4), the 5th overfire air port (5), the 6th overfire air port (6) and the 7th overfire air port (7) all is provided with air quantity controllable register (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120188381U CN202132971U (en) | 2011-06-07 | 2011-06-07 | Secondary air arrangement structure of W flame boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120188381U CN202132971U (en) | 2011-06-07 | 2011-06-07 | Secondary air arrangement structure of W flame boiler |
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| Publication Number | Publication Date |
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| CN202132971U true CN202132971U (en) | 2012-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120188381U Expired - Lifetime CN202132971U (en) | 2011-06-07 | 2011-06-07 | Secondary air arrangement structure of W flame boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104910A (en) * | 2013-02-18 | 2013-05-15 | 上海锅炉厂有限公司 | Micro oxygen rich combustion W flame boiler and CO2 emission reduction system |
| CN103574579A (en) * | 2013-10-31 | 2014-02-12 | 广东电网公司电力科学研究院 | Tube wall overtemperature control method for platen superheater in 1045-megawatt ultra supercritical boiler |
| CN103672950A (en) * | 2013-10-17 | 2014-03-26 | 贵州电力试验研究院 | Method for combustion adjustment of W-type flame furnace with under-arch secondary air at adjustable down-dip angle |
| CN104913299A (en) * | 2015-06-01 | 2015-09-16 | 东南大学 | W flame boiler burner and air distribution method thereof |
| CN109990269A (en) * | 2019-04-23 | 2019-07-09 | 西安热工研究院有限公司 | A kind of W flame boiler allocation of the amount of air regulating system |
-
2011
- 2011-06-07 CN CN201120188381U patent/CN202132971U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104910A (en) * | 2013-02-18 | 2013-05-15 | 上海锅炉厂有限公司 | Micro oxygen rich combustion W flame boiler and CO2 emission reduction system |
| CN103104910B (en) * | 2013-02-18 | 2015-09-23 | 上海锅炉厂有限公司 | A kind of micro-oxygen-enriched combusting W flame boiler and CO 2emission-reducing system |
| CN103672950A (en) * | 2013-10-17 | 2014-03-26 | 贵州电力试验研究院 | Method for combustion adjustment of W-type flame furnace with under-arch secondary air at adjustable down-dip angle |
| CN103672950B (en) * | 2013-10-17 | 2016-02-10 | 贵州电力试验研究院 | The firing optimization method of the W type flame furnace that the lower Secondary Air tilt angled down of arch is adjustable |
| CN103574579A (en) * | 2013-10-31 | 2014-02-12 | 广东电网公司电力科学研究院 | Tube wall overtemperature control method for platen superheater in 1045-megawatt ultra supercritical boiler |
| CN103574579B (en) * | 2013-10-31 | 2015-06-24 | 广东电网公司电力科学研究院 | Tube wall overtemperature control method for platen superheater in 1045-megawatt ultra supercritical boiler |
| CN104913299A (en) * | 2015-06-01 | 2015-09-16 | 东南大学 | W flame boiler burner and air distribution method thereof |
| CN109990269A (en) * | 2019-04-23 | 2019-07-09 | 西安热工研究院有限公司 | A kind of W flame boiler allocation of the amount of air regulating system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120201 |
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| CX01 | Expiry of patent term |