CN202328207U - Low-nitrogen type two-air-channel coal powder combustor - Google Patents
Low-nitrogen type two-air-channel coal powder combustor Download PDFInfo
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- CN202328207U CN202328207U CN2011204685584U CN201120468558U CN202328207U CN 202328207 U CN202328207 U CN 202328207U CN 2011204685584 U CN2011204685584 U CN 2011204685584U CN 201120468558 U CN201120468558 U CN 201120468558U CN 202328207 U CN202328207 U CN 202328207U
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Abstract
The utility model discloses a low-nitrogen type two-air-channel coal powder combustor, which consists of an upper primary air channel, a lower primary air channel, an ignition oil-saving oil gun, waist air channels, waist air butterfly-shaped air doors, jet flow holes and a lateral air channel, and is characterized in that: a backflow space is formed between the upper primary air channel and the lower primary air channel; the ignition oil-saving oil gun is arranged in the center of the backflow space; the waist air channels are formed on the left side and the right side of the backflow space; the lateral air channel is formed on the back-fire side of the combustor; and the jet flow holes are formed on the rear part of the combustor. The low-nitrogen type two-air-channel coal powder combustor has long service life and a simple structure, and is easy to operate and convenient to improve; according to a special adjustment mode, the problems of unstable combustion, high flying ash combustible content, coking and the like are well solved; and the NOx content in discharged smoke can be reduced by 25 to 40 percent.
Description
Technical field
The utility model relates to the coal burner technology, particularly a kind of low nitrogen type two air channel coal burners.
Background technology
China is maximum in the world coal production state and country of consumption; The NOx that coal combustion produced is one of primary pollution source that causes atmosphere pollution; Not only endanger people's living environment, seriously restricting the sustainable development of China's energy industry and even whole national economy especially.Traditional coal-dust combustion device is made up of interior wind passage, exogenous wind passage and breeze airflow mixture channel; The breeze airflow hybrid channel is between interior wind and exogenous wind passage; Be provided with cyclone in the interior wind passage, the exogenous wind outlet is the circumferential weld structure, and the interior general mood flow point that breeze airflow mixture one ejection of the burner of this structure promptly is rotated looses; Burner outlet zone coal powder density is reduced; Thereby cause problems such as combustion instability, fly ash combustible material height, coking, NOx discharge capacity are big, therefore, a kind of coal burner that can effectively solve above-mentioned shortcoming of hope research and development that people are urgent.
Summary of the invention
The utility model purpose is to above-mentioned technical disadvantages a kind of low nitrogen type two air channel coal burners to be provided.
The technical scheme of the utility model is following: a kind of low nitrogen type two air channel coal burners; By last air channel, air channel, igniting fuel-economizing oil gun, waist air channel, waist wind butterfly throttle, jet orifice and side air channel are formed next time; It is characterized in that: last air channel and next time be formed with a backflow space between the air channel, backflow space center position are provided with igniting fuel-economizing oil gun, and the waist air channel is installed in the left and right sides, backflow space; The burner back-fire side is provided with the side air channel, and the rear portion is provided with jet orifice.
Described last air channel and next time the air channel be isometric and be arranged in parallel.
Waist wind butterfly throttle is installed on the described waist air channel.
The beneficial effect of the utility model is: adopt high temperature resistant, anti-abrasive material making, and long product lifecycle, system is simple to operation; It is convenient to transform, and the regulative mode through special has well solved problems such as combustion instability, fly ash combustible material height, coking; Improve boiler efficiency 1～2.5%; But adopt black furnace igniting fuel-economizing 60～90%, reduced low-load combustion-stabilizing significantly and thrown the oil pole limit, the burner that the nitrogen rate is higher than general type falls in product; NOx content can reduce by 25～40% in its smoke evacuation, and oke exhaust blackness also reduces significantly.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model vertical view.
Fig. 3 is the utility model profile.
Among the figure, 1 is last air channel, and 2 are air channel next time, and 3 are igniting fuel-economizing oil gun, and 4 is the waist air channel, and 5 is waist wind butterfly throttle, and 6 is jet orifice, and 7 is the side air channel.
The specific embodiment
Be described further below in conjunction with the specific embodiment of accompanying drawing the utility model:
A kind of low nitrogen type two air channel coal burners; By last air channel (1), air channel (2), igniting fuel-economizing oil gun (3), waist air channel (4), waist wind butterfly throttle (5), jet orifice (6) and side air channel (7) are formed next time; It is characterized in that: last air channel (1) and be formed with a backflow space between air channel (2) next time; Backflow space center position is provided with igniting fuel-economizing oil gun (3); Waist air channel (4) is installed in the left and right sides, backflow space, and the burner back-fire side is provided with side air channel (7), and the rear portion is provided with jet orifice (6).
Described last air channel (1) and next time air channel (2) for isometric and be arranged in parallel.
Waist wind butterfly throttle (5) is installed on the described waist air channel (4).
Described igniting fuel-economizing oil gun (3) flow is 100～200kg/h.
The utility model specific embodiment is following:
A kind of low nitrogen type two air channel coal burners; In last once air channel (1) be formed with a backflow space between air channel (2) next time; When two strands of wind get into burner through jet orifice (6) with the form of adherent jet, the momentum of adherent jet forms a strong recirculating zone in the backflow space, and the recirculating zone is open shape and entrainments a large amount of high-temperature flue gas in depths in the stove; Last air channel (1) and next time the air-flow of air channel (2) under the effect of the flue gas that direction refluxes; Assemble to intrinsic deflection, near burner nozzle, form " the steady combustion district " of " high coal powder density, high temperature, hyperoxia concentration " like this, strengthened the combustion stability of primary wind and powder air-flow; The chemistry that departs from the NOx generation in the backflow space separately owing to bias combustion simultaneously can effectively reduce the generation of NOx when making a gesture of measuring.
The utility model is provided with waist air channel (4) in both sides, backflow space; Waist wind butterfly throttle (5) is installed on the waist air channel (4), can controls ignition point position through adjustment waist wind butterfly throttle (5), thus the adjustment burning; Also can block the wind powder mixture in furnace high-temperature flue gas and the burner in waist air channel (4); Weaken the ignition temperature in the burner, though reflux during standard-sized sheet and still exist, backflow at this moment is last air channel (1), air channel (2) and waist air channel (4) self backflow next time when waist wind butterfly throttle (5); Temperature and a wind-warm syndrome degree are approaching in the burner, can effectively prevent the burner scaling loss.
The utility model is provided with side air channel (7) at the back-fire side of burner, and its effect is to strengthen a wind rigidity, reduces reducing atmosphere, solid concentration and the flue-gas temperature of back-fire side water-cooling wall, can effectively prevent slagging scorification and high temperature corrosion.
Through above embodiment, the utility model long product lifecycle, system is simple to operation; It is convenient to transform, and the regulative mode through special has well solved problems such as combustion instability, fly ash combustible material height, coking; Improve boiler efficiency 1～2.5%, but adopt black furnace igniting fuel-economizing 60～90%, reduced low-load combustion-stabilizing significantly and thrown the oil pole limit; The burner that the nitrogen rate is higher than general type falls in product, and NOx content can reduce by 25～40% in its smoke evacuation, and oke exhaust blackness also reduces significantly.
Claims (3)
1. one kind low nitrogen type two air channel coal burners; By last air channel, air channel, igniting fuel-economizing oil gun, waist air channel, waist wind butterfly throttle, jet orifice and side air channel are formed next time; It is characterized in that: described last air channel and next time be formed with a backflow space between the air channel, backflow space center position are provided with igniting fuel-economizing oil gun, and the waist air channel is installed in the left and right sides, backflow space; The burner back-fire side is provided with the side air channel, and the rear portion is provided with jet orifice.
2. a kind of low nitrogen type two air channel coal burners according to claim 1 is characterized in that: described last air channel and next time the air channel be isometric and be arranged in parallel.
3. a kind of low nitrogen type two air channel coal burners according to claim 1 is characterized in that: waist wind butterfly throttle is installed on the described waist air channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204685584U CN202328207U (en) | 2011-11-23 | 2011-11-23 | Low-nitrogen type two-air-channel coal powder combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204685584U CN202328207U (en) | 2011-11-23 | 2011-11-23 | Low-nitrogen type two-air-channel coal powder combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202328207U true CN202328207U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204685584U Expired - Fee Related CN202328207U (en) | 2011-11-23 | 2011-11-23 | Low-nitrogen type two-air-channel coal powder combustor |
Country Status (1)
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| CN (1) | CN202328207U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465814A (en) * | 2015-03-30 | 2016-04-06 | 无锡华光锅炉股份有限公司 | Branched structure of primary air pulverized coal pipe |
-
2011
- 2011-11-23 CN CN2011204685584U patent/CN202328207U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465814A (en) * | 2015-03-30 | 2016-04-06 | 无锡华光锅炉股份有限公司 | Branched structure of primary air pulverized coal pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20191123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |