CN103912873A - Separate-type pulverized coal nozzle - Google Patents
Separate-type pulverized coal nozzle Download PDFInfo
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- CN103912873A CN103912873A CN201410120232.0A CN201410120232A CN103912873A CN 103912873 A CN103912873 A CN 103912873A CN 201410120232 A CN201410120232 A CN 201410120232A CN 103912873 A CN103912873 A CN 103912873A
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- side nozzle
- outlet
- nozzle outlet
- guide plate
- breeze airflow
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Abstract
The invention provides a separate-type pulverized coal nozzle which can be flexibly arranged, is conducive to burning of low-volatile fuel and reducing of N0x generation, good in fuel adaptability, especially suitable for high-moisture, high-ash, low-volatile and low-heat-value fuel and beneficial to improving of burn-off rate. The separate-type pulverized coal nozzle comprises a nozzle inlet, two nozzle outlets and a middle flowing pipeline, and pulverized coal direct flow is directly communicated with the nozzle inlet. The separate-type pulverized coal nozzle is characterized in that the nozzle outlets are in up-down arrangement and include a thick-side nozzle outlet and a thin-side nozzle outlet which are isolated through a partition, outlet tracks of the thick-side nozzle outlet and the thin-side nozzle outlet form a flaring angle, guide plates are arranged in the middle flowing passage at intervals, a flowing space is reserved between the rear end of each guide plate and the front end of the guide plate behind, and most of the pulverized coal airflow is guided to enter the thick-side nozzle outlet by the guide plates.
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 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 invention provides a kind of separate type coal nozzle, 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 invention, 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.
Accompanying drawing explanation
Fig. 1 is the structural representation of specific embodiments of the invention one;
Fig. 2 is the structural representation of specific embodiments of the invention two.
The specific embodiment
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 |
|---|---|---|---|
| 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 true CN103912873A (en) | 2014-07-09 |
| CN103912873B CN103912873B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410120232.0A Active CN103912873B (en) | 2014-03-28 | 2014-03-28 | A kind of separate type coal nozzle |
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| Country | Link |
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| CN (1) | CN103912873B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107475533A (en) * | 2017-07-07 | 2017-12-15 | 南通大学 | Aluminium ash fries grey machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03129202A (en) * | 1989-10-16 | 1991-06-03 | Babcock Hitachi Kk | Pulverized coal combustion device |
| 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 |
| CN102235666A (en) * | 2010-04-27 | 2011-11-09 | 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 |
-
2014
- 2014-03-28 CN CN201410120232.0A patent/CN103912873B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03129202A (en) * | 1989-10-16 | 1991-06-03 | Babcock Hitachi Kk | Pulverized coal combustion device |
| 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 |
| CN102235666A (en) * | 2010-04-27 | 2011-11-09 | 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107475533A (en) * | 2017-07-07 | 2017-12-15 | 南通大学 | Aluminium ash fries grey machine |
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| CN103912873B (en) | 2016-08-17 |
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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. |
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