CN203797654U - Split type pulverized-coal nozzle - Google Patents
Split type pulverized-coal nozzle Download PDFInfo
- Publication number
- CN203797654U CN203797654U CN201420144584.5U CN201420144584U CN203797654U CN 203797654 U CN203797654 U CN 203797654U CN 201420144584 U CN201420144584 U CN 201420144584U CN 203797654 U CN203797654 U CN 203797654U
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- CN
- China
- Prior art keywords
- side nozzle
- nozzle outlet
- outlet
- guide plate
- breeze airflow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model provides a split type pulverized-coal nozzle. The split type pulverized-coal nozzle with flexible arrangement facilitates burning of low-volatile fuel and reduction of NOx generation, is good in adaptability to the fuel, particularly to high-water fuel, high-ash fuel, low-volatile fuel and low-heating value fuel and capable of increasing burn-off rate. The split type pulverized-coal nozzle comprises a nozzle inlet, a nozzle outlet and a middle circulation pipeline. A pulverized-coal airflow is directly communicated with the nozzle inlet. The split type pulverized-coal nozzle is characterized in that the nozzle outlet combination comprises a thick-side nozzle outlet and a thin-side nozzle outlet which are disposed up and down and isolated by a partition plate, a flaring angle is formed by outlet tracks of the thick-side nozzle outlet and the thin-side nozzle outlet, guiding plates are arranged in the middle circulation pipeline at intervals, a circulation space is formed between the rear end of each guiding plate and the front end of the later guiding plate, and most part of pulverized-coal airflow is guided into the thick-side nozzle outlet by the guiding plates.
Description
Technical field
The utility model relates to the technical field of boiler structure, is specially a kind of separate type coal nozzle.
Background technology
Efficient low-discharging is that pulverized-coal fired boiler designs mandatory principle, and coal nozzle is the vitals in coal burner, plays a part the catching fire of coal dust, surely combustion, control combustion process and nitrogen oxides emission.Many power plant use high moisture content, ash-rich in recent years, and low-calorie fuel makes economy, security and the NOx discharge of power plant not up to standard, is seriously perplexing further developing of power plant.
Summary of the invention
For the problems referred to above, the utility model provides a kind of separate type coal nozzle, and it can flexible arrangement, be conducive to the burning of low-volatile fuel, reduce the generation of N0x, fuel tolerance is good, be particularly suitable for high moisture content, ash-rich, low-volatile, low-calorie fuel, improve burn-off rate.
A kind of separate type coal nozzle, its technical scheme is such: it comprises nozzle inlet, jet expansion, middle part circulation duct, breeze airflow is directly communicated with described nozzle inlet, it is characterized in that: described jet expansion is specially two jet expansions of arranging up and down, comprise dense side nozzle outlet, light side nozzle outlet, described dense side nozzle outlet, between light side nozzle outlet, isolate by demarcation strip, and dense side nozzle outlet, the outlet track of light side nozzle outlet forms flaring angle, in the circulation duct of described middle part, guide plate is arranged at interval, between the front end of the rear end of every described guide plate and a rear guide plate, leave free air space, most of guiding in breeze airflow is entered described dense side nozzle outlet by described guide plate, in breeze airflow, small part enters into described light side nozzle outlet through free air space.
It is further characterized in that: the export center position of described dense side nozzle outlet, the outlet of light side nozzle is provided with the vortex board of corrugated;
The outlet edge position of described dense side nozzle outlet, the outlet of light side nozzle is evenly equipped with steady flame toothing;
When described dense side nozzle outlet is positioned at the below of described light side nozzle outlet, described guide plate is arranged along breeze airflow direction interval from top to bottom, every described guide plate is downward-sloping along breeze airflow direction, and described guide plate is bottom positioned on the entrance height of described dense side nozzle outlet;
When described dense side nozzle outlet is positioned at the top of described light side nozzle outlet, described guide plate is arranged along breeze airflow direction interval from bottom to top, every described guide plate is inclined upwardly along breeze airflow direction, and the guide plate of described the top is positioned under the entrance height of described dense side nozzle outlet.
Adopt after structure of the present utility model, upper and lower deep or light two-phase coal dust enters burner hearth by dense side nozzle outlet, the outlet of light side nozzle after spraying after being separated by spaced apart guide plate respectively, the characteristic of its based on fuel completes the separation to breeze airflow by guide plate, and deep or light two-phase coal dust is introduced respectively to the outlet of dense side nozzle and the light side discharge of separation, distinct two nozzles are divided into two former coal nozzle, it makes the corresponding minimizing of coal powder ignition heat, is beneficial to igniting; The thermal power of single coal nozzle reduces, and also makes burner wall thermic load reduce, and is beneficial to anti-coking and low NOx drainage; A general mood, fluently in mixing with Secondary Air, improves burnout rate; It is relatively concentrated that adjacent two layers of wind is arranged as coal dust concentrated phase, is conducive to reduce the generation of N0x, is conducive to the burning of low-volatile fuel simultaneously.Guide plate can flexible arrangement, is conducive to the burning of low-volatile fuel, reduces the generation of N0x, and fuel tolerance is good, is particularly suitable for high moisture content, ash-rich, low-volatile, low-calorie fuel, improves burn-off rate.
Brief description of the drawings
Fig. 1 is the structural representation of specific embodiment of the utility model one;
Fig. 2 is the structural representation of specific embodiment of the utility model two.
Detailed description of the invention
A kind of separate type coal nozzle, see Fig. 1 or Fig. 2: it comprises nozzle inlet 1, jet expansion, middle part circulation duct 2, breeze airflow is directly communicated with nozzle inlet 1, jet expansion is specially two jet expansions of arranging up and down, comprise dense side nozzle outlet 3, light side nozzle outlet 4, dense side nozzle outlet 3, 4 of light side nozzle outlets are isolated by demarcation strip 5, and dense side nozzle outlet 3, the outlet track of light side nozzle outlet 4 forms flaring angle, guide plate 6 is arranged at the interior interval of circulation duct 2, middle part, between the front end of the rear end of every guide plate 6 and a rear guide plate 6, leave free air space 7, most of guiding in breeze airflow is entered dense side nozzle outlet 3 by guide plate 6, in breeze airflow, small part enters into light side nozzle outlet 4 through free air space 7.The export center position of dense side nozzle outlet 3, light side nozzle outlet 4 is provided with the vortex board 8 of corrugated; The outlet edge position of dense side nozzle outlet 3, light side nozzle outlet 4 is evenly equipped with steady flame toothing 9.The vortex board 8 of corrugated and steady flame toothing 9 produce local eddy currents in spout, increase the time of staying of ignition heat and coal grain, are beneficial to and catch fire and flame stable, suppress the generation of NOx simultaneously.
Specific embodiment one, see Fig. 1: when dense side nozzle outlet 3 is positioned at the below of light side nozzle outlet 4, guide plate 6 is arranged along breeze airflow direction interval from top to bottom, every guide plate 6 is downward-sloping along breeze airflow direction, and guide plate 6 is bottom positioned on the entrance height of dense side nozzle outlet 3.
Specific embodiment two, see Fig. 2: when dense side nozzle outlet 3 is positioned at the top of light side nozzle outlet 4, guide plate 6 is arranged along breeze airflow direction interval from bottom to top, every guide plate 6 is inclined upwardly along breeze airflow direction, and guide plate 6 is topmost positioned under the entrance height of dense side nozzle outlet 3.
Claims (5)
1. a separate type coal nozzle, it comprises nozzle inlet, jet expansion, middle part circulation duct, breeze airflow is directly communicated with described nozzle inlet, it is characterized in that: described jet expansion is specially two jet expansions of arranging up and down, comprise dense side nozzle outlet, light side nozzle outlet, described dense side nozzle outlet, between light side nozzle outlet, isolate by demarcation strip, and dense side nozzle outlet, the outlet track of light side nozzle outlet forms flaring angle, in the circulation duct of described middle part, guide plate is arranged at interval, between the front end of the rear end of every described guide plate and a rear guide plate, leave free air space, most of guiding in breeze airflow is entered described dense side nozzle outlet by described guide plate, in breeze airflow, small part enters into described light side nozzle outlet through free air space.
2. a kind of separate type coal nozzle according to claim 1, is characterized in that: the export center position of described dense side nozzle outlet, the outlet of light side nozzle is provided with the vortex board of corrugated.
3. a kind of separate type coal nozzle according to claim 1 and 2, is characterized in that: the outlet edge position of described dense side nozzle outlet, the outlet of light side nozzle is evenly equipped with steady flame toothing.
4. a kind of separate type coal nozzle according to claim 1, it is characterized in that: when described dense side nozzle outlet is positioned at the below of described light side nozzle outlet, described guide plate is arranged along breeze airflow direction interval from top to bottom, every described guide plate is downward-sloping along breeze airflow direction, and described guide plate is bottom positioned on the entrance height of described dense side nozzle outlet.
5. a kind of separate type coal nozzle according to claim 1, it is characterized in that: when described dense side nozzle outlet is positioned at the top of described light side nozzle outlet, described guide plate is arranged along breeze airflow direction interval from bottom to top, every described guide plate is inclined upwardly along breeze airflow direction, and the guide plate of described the top is positioned under the entrance height of described dense side nozzle outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420144584.5U CN203797654U (en) | 2014-03-28 | 2014-03-28 | Split type pulverized-coal nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420144584.5U CN203797654U (en) | 2014-03-28 | 2014-03-28 | Split type pulverized-coal nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203797654U true CN203797654U (en) | 2014-08-27 |
Family
ID=51379862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420144584.5U Withdrawn - After Issue CN203797654U (en) | 2014-03-28 | 2014-03-28 | Split type pulverized-coal nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203797654U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912873A (en) * | 2014-03-28 | 2014-07-09 | 无锡华光锅炉股份有限公司 | Separate-type pulverized coal nozzle |
-
2014
- 2014-03-28 CN CN201420144584.5U patent/CN203797654U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912873A (en) * | 2014-03-28 | 2014-07-09 | 无锡华光锅炉股份有限公司 | Separate-type pulverized coal nozzle |
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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: 20140827 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |