CN103912873B - A kind of separate type coal nozzle - Google Patents
A kind of separate type coal nozzle Download PDFInfo
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- CN103912873B CN103912873B CN201410120232.0A CN201410120232A CN103912873B CN 103912873 B CN103912873 B CN 103912873B CN 201410120232 A CN201410120232 A CN 201410120232A CN 103912873 B CN103912873 B CN 103912873B
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- side nozzle
- outlet
- guide plate
- nozzle
- light side
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Abstract
The invention provides a kind of separate type coal nozzle, its can flexible arrangement, the beneficially burning of low-volatile fuel, reduce the generation of N0x, fuel tolerance is good, is particularly suitable for high moisture content, ash-rich, low-volatile, low-calorie fuel, improves burn-off rate.It includes nozzle inlet, jet expansion, middle part circulation duct, breeze airflow directly connects described nozzle inlet, it is characterized in that: described jet expansion is specially about two jet expansions arranged, export including dense side nozzle, light side nozzle exports, described dense side nozzle exports, isolated by demarcation strip between the outlet of light side nozzle, and the outlet of dense side nozzle, the exit trajectory of light side nozzle outlet forms flaring angle, in the circulation duct of described middle part, guide plate is arranged at interval, free air space is left between rear end and the front end of rear one piece of guide plate of every piece of described guide plate, major part in breeze airflow is directed into the outlet of described dense side nozzle by described guide plate.
Description
Technical field
The present invention relates to the technical field of boiler structure, be 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 fires, controls flame mechanism and nitrogen oxides emission.Many power plant use high moisture content, ash-rich, low-calorie fuel in recent years so that the economy of power plant, safety and NOx emission are the most up to standard, seriously annoying the further development of power plant.
Summary of the invention
For the problems referred to above, the invention provides a kind of separate type coal nozzle, it can flexible arrangement, being conducive to the burning of low-volatile fuel, reduce the generation of N0x, fuel tolerance is good, it is particularly suitable for high moisture content, ash-rich, low-volatile, low-calorie fuel, improves burn-off rate.
A kind of separate type coal nozzle, its technical scheme is such that it and includes nozzle inlet, jet expansion, middle part circulation duct, breeze airflow directly connects described nozzle inlet, it is characterized in that: described jet expansion is specially about two jet expansions arranged, export including dense side nozzle, light side nozzle exports, described dense side nozzle exports, isolated by demarcation strip between the outlet of light side nozzle, and the outlet of dense side nozzle, the exit trajectory of light side nozzle outlet forms flaring angle, in the circulation duct of described middle part, guide plate is arranged at interval, free air space is left between rear end and the front end of rear one piece of guide plate of every piece of described guide plate, major part in breeze airflow is directed into the outlet of described dense side nozzle by described guide plate, breeze airflow least partially penetrates free air space and enters into the outlet of described light side nozzle.
The export center position that it is further characterized by the outlet of described dense side nozzle, light side nozzle exports is provided with the vortex board of corrugated；
The outlet of described dense side nozzle, the outlet edge position of light side nozzle outlet are evenly equipped with steady flame toothing；
When the outlet of described dense side nozzle is positioned at the lower section of described light side nozzle outlet, described guide plate is arranged along interval, breeze airflow direction from top to bottom, every piece of described guide plate is downward-sloping along breeze airflow direction, and the guide plate of described bottom is positioned on the entrance height of described dense side nozzle outlet；
When the outlet of described dense side nozzle is positioned at the top of described light side nozzle outlet, described guide plate is arranged along interval, breeze airflow direction from bottom to top, every piece of 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.
After using the structure of the present invention, upper and lower deep or light biphase coal dust is exported by dense side nozzle after being separated by spaced apart guide plate respectively, the outlet of light side nozzle enters burner hearth after spraying, it is completed the separation to breeze airflow according to the characteristic of fuel by guide plate, and deep or light biphase coal dust is introduced respectively the outlet of dense side nozzle and the light side discharge of separation, former coal nozzle is divided into two by distinct two nozzles, it makes, and coal powder ignition heat is corresponding to be reduced, and is beneficial to igniting；The thermal power of single coal nozzle reduces, and also makes burner wall fever sensation of the face load reduction, beneficially anti-coking and low NOx drainage；First air air-flow is beneficial to mix with secondary wind, improves burnout rate；Adjacent two layers of First air are arranged as coal dust concentrated phase Relatively centralized, advantageously reduce the generation of N0x, the most beneficially burning of low-volatile fuel.Guide plate can flexible arrangement, the beneficially burning of low-volatile fuel, reduce the generation of N0x, fuel tolerance is good, is particularly suitable for high moisture content, ash-rich, low-volatile, low-calorie fuel, improves burn-off rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the specific embodiment one of the present invention；
Fig. 2 is the structural representation of the specific embodiment two of the present invention.
Detailed description of the invention
A kind of separate type coal nozzle, see Fig. 1 or Fig. 2: it includes nozzle inlet 1, jet expansion, middle part circulation duct 2, breeze airflow directly connects nozzle inlet 1, jet expansion is specially about two jet expansions arranged, 3 are exported including dense side nozzle, light side nozzle outlet 4, dense side nozzle outlet 3, isolated by demarcation strip 5 between light side nozzle outlet 4, and dense side nozzle outlet 3, the exit trajectory of light side nozzle outlet 4 forms flaring angle, in middle part circulation duct 2, guide plate 6 is arranged at interval, free air space 7 is left between rear end and the front end of rear one piece of guide plate 6 of every piece of guide plate 6, major part in breeze airflow is directed into dense side nozzle outlet 3 by guide plate 6, breeze airflow least partially penetrates free air space 7 and enters into light side nozzle outlet 4.Dense side nozzle outlet 3, the export center position of light side nozzle outlet 4 are provided with the vortex board 8 of corrugated；Dense side nozzle outlet 3, the outlet edge position of light side nozzle outlet 4 are evenly equipped with steady flame toothing 9.In spout, the vortex board 8 of corrugated and steady flame toothing 9 produce local eddy currents, increase ignition heat and the time of staying of coal grain, are beneficial to catch fire and the stablizing of flame, suppress the generation of NOx simultaneously.
Specific embodiment one, when seeing the lower section that Fig. 1: dense side nozzle outlet 3 is positioned at light side nozzle outlet 4, guide plate 6 is arranged along interval, breeze airflow direction from top to bottom, every piece of guide plate 6 is downward-sloping along breeze airflow direction, and the guide plate 6 of bottom is positioned on the entrance height of dense side nozzle outlet 3.
Specific embodiment two, when seeing the top that Fig. 2: dense side nozzle outlet 3 is positioned at light side nozzle outlet 4, guide plate 6 is arranged along interval, breeze airflow direction from bottom to top, every piece of guide plate 6 is inclined upwardly along breeze airflow direction, and guide plate 6 topmost is positioned under the entrance height of dense side nozzle outlet 3.
Claims (3)
1. a separate type coal nozzle, it includes nozzle inlet, jet expansion, middle part circulation duct, breeze airflow directly connects described nozzle inlet, it is characterized in that: described jet expansion is specially about two jet expansions arranged, export including dense side nozzle, light side nozzle exports, described dense side nozzle exports, isolated by demarcation strip between the outlet of light side nozzle, and the outlet of dense side nozzle, the exit trajectory of light side nozzle outlet forms flaring angle, in the circulation duct of described middle part, guide plate is arranged at interval, free air space is left between rear end and the front end of rear one piece of guide plate of every piece of described guide plate, major part in breeze airflow is directed into the outlet of described dense side nozzle by described guide plate, breeze airflow least partially penetrates free air space and enters into the outlet of described light side nozzle；The outlet of described dense side nozzle, the export center position of light side nozzle outlet are provided with the vortex board of corrugated；The outlet of described dense side nozzle, the outlet edge position of light side nozzle outlet are evenly equipped with steady flame toothing.
A kind of separate type coal nozzle the most according to claim 1, it is characterized in that: when the outlet of described dense side nozzle is positioned at the lower section of described light side nozzle outlet, described guide plate is arranged along interval, breeze airflow direction from top to bottom, every piece of described guide plate is downward-sloping along breeze airflow direction, and the described guide plate of bottom is positioned on the entrance height of described dense side nozzle outlet.
A kind of separate type coal nozzle the most according to claim 1, it is characterized in that: when the outlet of described dense side nozzle is positioned at the top of described light side nozzle outlet, described guide plate is arranged along interval, breeze airflow direction from bottom to top, every piece of described guide plate is inclined upwardly along breeze airflow direction, and described guide plate topmost is positioned under the entrance height of described dense side nozzle outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410120232.0A CN103912873B (en) | 2014-03-28 | 2014-03-28 | A kind of separate type coal nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410120232.0A CN103912873B (en) | 2014-03-28 | 2014-03-28 | A kind of separate type coal nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103912873A CN103912873A (en) | 2014-07-09 |
| CN103912873B true CN103912873B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410120232.0A Active CN103912873B (en) | 2014-03-28 | 2014-03-28 | A kind of separate type coal nozzle |
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| CN (1) | CN103912873B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107475533A (en) * | 2017-07-07 | 2017-12-15 | 南通大学 | Aluminium ash fries grey machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2735643B2 (en) * | 1989-10-16 | 1998-04-02 | バブコツク日立株式会社 | Pulverized coal combustion equipment |
| CN101294705A (en) * | 2007-04-25 | 2008-10-29 | 烟台龙源电力技术股份有限公司 | Highly effective internal combustion type pulverized coal burner with ignition source |
| CN102235666B (en) * | 2010-04-27 | 2014-11-26 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and pulverized coal fired boiler comprising same |
| CN202371710U (en) * | 2011-10-25 | 2012-08-08 | 上海锅炉厂有限公司 | Concentrator for pulverized coal burner |
| CN203099812U (en) * | 2012-11-21 | 2013-07-31 | 北京哈宜节能环保科技开发有限公司 | Airfoil blade flow guide rich-lean pulverized coal burner |
| CN203273882U (en) * | 2013-05-13 | 2013-11-06 | 杨占春 | Pulverized coal burner |
| CN203797654U (en) * | 2014-03-28 | 2014-08-27 | 无锡华光锅炉股份有限公司 | Split type pulverized-coal nozzle |
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2014
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| CN103912873A (en) | 2014-07-09 |
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Address after: 214028 No. 3 Chengnan Road, new Wu District, Jiangsu, Wuxi Patentee after: Wuxi Huaguang Environmental Protection Energy Group Co., Ltd Address before: 214028 No. 3 Chengnan Road, New District, Jiangsu, Wuxi Patentee before: WUXI HUAGUANG BOILER Co.,Ltd. |