CN102777893B - External secondary air adjusting method and structure for W-flame direct current boiler of double-air regulation burner - Google Patents
External secondary air adjusting method and structure for W-flame direct current boiler of double-air regulation burner Download PDFInfo
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- CN102777893B CN102777893B CN201210276715.0A CN201210276715A CN102777893B CN 102777893 B CN102777893 B CN 102777893B CN 201210276715 A CN201210276715 A CN 201210276715A CN 102777893 B CN102777893 B CN 102777893B
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- hearth
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- secondary air
- direct current
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Abstract
The invention discloses an external secondary air adjusting method and structure for a W-flame direct current boiler of a double-air adjusting burner. The method disclosed by the invention is characterized in that an external secondary air angle of each burner at the regions close to the two sides of a hearth is adjusted to be 65 degrees; the external secondary air angle of the burner at the region close to the center of the hearth is adjusted to be 55 degrees; and the external secondary air angle of each burner at the other regions in the hearth is adjusted to be 60 degrees. The method has the beneficial effects that a problem is put forward firstly, and the reason, found by the inventor by virtue of massive research and calculation, is that different positions of the hearth have different combustion requirements; slagging at the two sides of the hearth is required to be controlled, a smaller secondary air rotational flow is required to be controlled, so as to prevent a pulverized coal air flow from painting a wall, thus no slagging or deterioration is caused; the secondary air rotational flow at the center of the hearth is required to be increased, underscouring capacity is weakened, so as to prevent a flame at the center of the hearth from moving upward, and thus the water cooled wall at the middle part is prevented from being overheated; and the other burners are arranged according to 60 degrees with better economy, so as to ensure the whole combustion economy of the boiler.
Description
Technical field
The present invention relates to a kind of two wind combustor W flame direct current cooker outer second air method of adjustment and structure thereof adjusted, belong to direct current cooker burning adjustment field.
Background technology
Two tune wind combustor W flame direct current cooker combustion systems are opposed firing burning, and the subject matter that the burning of W flame boiler exists is the contradiction between combustion stability, economy and slagging scorification.There is the problem of the easy overtemperature of water-cooling wall in direct current cooker.The outer second air angle of two tune wind combustors has considerable influence to burning.Outer second air amount accounts for the more than 65% of total blast volume.Outer second air angle strengthens, and air-flow rigidity increases, and undershoot ability is strong.Outer second air angle reduces, and air-flow swirl strength strengthens, and undershoot ability weakens.Two tune wind combustor W flame direct current cookers are owing to burning with cyclone mode, boiler combustion better economy, but in order to increase combustion stability, lower hearth do not fire be with more, the easy slagging scorification of side wall and aileron, in addition middle water-wall tube because of combustion intensity large, easily overtemperature.The operation of outer second air angle power plant is general by 60 ° of manufacturer's recommended values, although economy is guaranteed under 60 ° of conditions, boiler scaling and water-cooling wall overheating problem are outstanding.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of two wind combustor W flame direct current cooker outer second air method of adjustment and structures thereof adjusted that can solve contradiction between two tune wind combustor W flame direct current cooker combustion economizations, slagging scorification and water-cooling wall overtemperature, can overcome the deficiencies in the prior art.
Technical scheme of the present invention is: the outer second air method of adjustment of two tune wind combustor W flame direct current cookers is to be set to 65 ° by the outer second air angle of the burner of burner hearth two side areas; Lean on the outer second air angle of the burner of burner hearth central area to be set to 55 °; In burner hearth, the outer second air angle of the burner in all the other regions is set to 60 °.
Burner quantity by burner hearth two side areas is four.
Burner quantity by burner hearth central area is four.
The outer second air of two tune wind combustor W flame direct current cookers arranges structure, and it comprises burner hearth, is provided with burner in burner hearth, and the outer second air angle that is positioned at four side burners of burner hearth both sides is 65 °; The outer second air angle that is positioned at four central burner at burner hearth center is 55 °; The outer second air angle of all the other burners in burner hearth is 60 °.
The quantity of all the other burners is 12-16.
Compared with the prior art, first beneficial effect of the present invention is embodied in the proposition of problem, through applicant's large quantity research and calculating, finds that its reason is that burner hearth diverse location has different requirements to burning.Slagging scorification will be controlled in burner hearth both sides, should control less Secondary Air eddy flow, in case breeze airflow is whitewashed a wall, slagging scorification is worsened.Burner hearth center should make Secondary Air eddy flow increase, and weakens Secondary Air undershoot ability, so that move on the flame at burner hearth center, prevents middle part water-cooling wall overtemperature.All the other burners are pressed 60 ° of settings of better economy, to ensure the economy of boiler integral combustion.
Contrast before and after outer second air angle layout optimization:
| Project | Clinkering property | Water-cooling wall overtemperature | Combustion economization |
| The unified 60 ° of layouts of outer second air | Burner hearth four angle blade wall slagging scorification are serious | The easy overtemperature of middle part water-cooling wall | Due to slagging scorification and overtemperature of tube wall, boiler must reduce load operation sometimes, and combustion economization reduces |
| Outer second air is by existing mode preferred arrangement | Burner hearth is without pernicious slagging scorification phenomenon | Can avoid water-cooling wall overheating problem | Boiler can maintain high load capacity stable operation, and combustion economization is secure |
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is burner structure schematic diagram.
Detailed description of the invention
embodiment: as shown in Figure 1, on the front-back wall of burner hearth 1, burner being installed, in Fig. 1,2 is that burner centered by side burner, 3,4 is all the other burners; Fig. 2 is burner structure schematic diagram, and burner mainly comprises: outer second air 5, inner second air 6 and wind 7 of coal dust, to understand after said structure, and this pair adjusts the outer second air method of adjustment of wind combustor W flame direct current cooker to be:
A is set to 65 ° by the outer second air angle of the burner (side burner 2) of burner hearth two side areas, is wherein four by the burner quantity of burner hearth two side areas;
B is set to 55 ° by the outer second air angle of the burner (central burner 3) of burner hearth central area, is four by the burner quantity of burner hearth central area.
In c burner hearth, the outer second air angle of the burner (all the other burners 4) in all the other regions is set to 60 °.
As Fig. 1, in burner hearth 1, be provided with 24 burners, the outer second air angle that is positioned at four side burners 2 of burner hearth 1 both sides is 65 °; The outer second air angle that is positioned at four central burner 3 at burner hearth 1 center is 55 °; The outer second air angle of all the other 16 burners 4 in burner hearth 1 is 60 °.The quantity of all the other burners 4 is 12-16, specifically determines according to the size of burner hearth 1.
Claims (5)
1. two outer second air methods of adjustment of adjusting wind combustor W flame direct current cooker, is characterized in that: the method is to be set to 65 ° by the outer second air angle of the burner of burner hearth two side areas; Lean on the outer second air angle of the burner of burner hearth central area to be set to 55 °; In burner hearth, the outer second air angle of the burner in all the other regions is set to 60 °.
2. two outer second air method of adjustment of adjusting wind combustor W flame direct current cooker according to claim 1, is characterized in that: the burner quantity by burner hearth two side areas is four.
3. two outer second air method of adjustment of adjusting wind combustor W flame direct current cooker according to claim 1, is characterized in that: the burner quantity by burner hearth central area is four.
4. two outer second airs of adjusting wind combustor W flame direct current cooker arrange structure, it comprises burner hearth (1), in burner hearth (1), be provided with burner, it is characterized in that: the outer second air angle that is positioned at four side burners (2) of burner hearth (1) both sides is 65 °; The outer second air angle that is positioned at four central burner (3) at burner hearth (1) center is 55 °; The outer second air angle of all the other burners (4) in burner hearth (1) is 60 °.
5. two outer second air of adjusting wind combustor W flame direct current cooker according to claim 4 arranges structure, it is characterized in that: the quantity of all the other burners (4) is 12-16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210276715.0A CN102777893B (en) | 2012-08-06 | 2012-08-06 | External secondary air adjusting method and structure for W-flame direct current boiler of double-air regulation burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210276715.0A CN102777893B (en) | 2012-08-06 | 2012-08-06 | External secondary air adjusting method and structure for W-flame direct current boiler of double-air regulation burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102777893A CN102777893A (en) | 2012-11-14 |
| CN102777893B true CN102777893B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210276715.0A Expired - Fee Related CN102777893B (en) | 2012-08-06 | 2012-08-06 | External secondary air adjusting method and structure for W-flame direct current boiler of double-air regulation burner |
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| CN (1) | CN102777893B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152112B (en) * | 2016-08-08 | 2018-06-19 | 浙江大学 | A kind of non-uniform air distribution coal dust opposed firing burner |
| CN106287677B (en) * | 2016-08-09 | 2019-04-02 | 贵州电网有限责任公司电力科学研究院 | A kind of method of adjustment of W flame direct current cooker Secondary Air |
| CN109931598B (en) * | 2019-03-11 | 2019-10-22 | 哈尔滨工业大学 | A kind of W flame boiler being disposed with turbulent burner and DC burner |
| CN115016576B (en) * | 2022-05-27 | 2024-02-09 | 国能河北沧东发电有限责任公司 | Reheat steam temperature control method and device, readable medium and electronic equipment |
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| CN101324332A (en) * | 2008-08-05 | 2008-12-17 | 贵州电力试验研究院 | Method for regulating W type flame furnace secondary air chamber and secondary air chamber of W type flame furnace |
| CN101324340A (en) * | 2008-08-05 | 2008-12-17 | 贵州电力试验研究院 | Apparatus for adjusting secondary wind direction under W type flame oven arch |
| WO2011130936A1 (en) * | 2010-04-19 | 2011-10-27 | 哈尔滨工业大学 | Staged combustion method with multiple injections and w-shaped flame boiler device for carrying out the same |
| CN102322631A (en) * | 2011-07-08 | 2012-01-18 | 贵州电力试验研究院 | Double-cyclone cylinder burner W-shaped flame boiler capable of stably burning pulverized coal |
| CN202692029U (en) * | 2012-08-06 | 2013-01-23 | 贵州电力试验研究院 | Outer secondary air adjusting structure of double air adjusting combustor W flame concurrent boiler |
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2012
- 2012-08-06 CN CN201210276715.0A patent/CN102777893B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324332A (en) * | 2008-08-05 | 2008-12-17 | 贵州电力试验研究院 | Method for regulating W type flame furnace secondary air chamber and secondary air chamber of W type flame furnace |
| CN101324340A (en) * | 2008-08-05 | 2008-12-17 | 贵州电力试验研究院 | Apparatus for adjusting secondary wind direction under W type flame oven arch |
| WO2011130936A1 (en) * | 2010-04-19 | 2011-10-27 | 哈尔滨工业大学 | Staged combustion method with multiple injections and w-shaped flame boiler device for carrying out the same |
| GB2486630A (en) * | 2010-04-19 | 2012-06-27 | Harbin Inst Of Technology | W-shaped flame boiler for multi-stage combustion with multi-ejection and its method thereof |
| CN102322631A (en) * | 2011-07-08 | 2012-01-18 | 贵州电力试验研究院 | Double-cyclone cylinder burner W-shaped flame boiler capable of stably burning pulverized coal |
| CN202692029U (en) * | 2012-08-06 | 2013-01-23 | 贵州电力试验研究院 | Outer secondary air adjusting structure of double air adjusting combustor W flame concurrent boiler |
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| CN102777893A (en) | 2012-11-14 |
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