CN102563638B - Pulverized-fuel boiler two-channel over-fire air or secondary air combustor device - Google Patents
Pulverized-fuel boiler two-channel over-fire air or secondary air combustor device Download PDFInfo
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- CN102563638B CN102563638B CN201210055682.7A CN201210055682A CN102563638B CN 102563638 B CN102563638 B CN 102563638B CN 201210055682 A CN201210055682 A CN 201210055682A CN 102563638 B CN102563638 B CN 102563638B
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Abstract
The invention discloses a pulverized-fuel boiler two-channel over-fire air or secondary air combustor device. The existing device influences an air dynamic field structure in a boiler so as to influence the boiler efficiency. The pulverized-fuel boiler two-channel over-fire air or secondary air combustor device comprises a two-channel nozzle, a two-channel air duct, a two-channel clapboard, a two-door linkage air door, two air door baffles and a single-channel air duct, wherein the two-channel nozzle is connected with one end of the two-channel air duct in a welding manner or a swinging manner, the other end of the two-channel air duct is connected with one end of the two-door linkage air door, the two air door baffles are arranged in the two-door linkage air door, the two air door baffles rotate around a rotating shaft synchronously, and are respectively corresponding to one channel of the two-channel air duct, the other end of the two-door linkage air door is connected with one end of the single-channel air duct, and the other end of the single-channel air duct is connected with an air pipeline. The pulverized-fuel boiler two-channel over-fire air or secondary air combustor device facilitates full mixing of pulverized coal and air so as to enable the pulverized coal to be combusted fully, is simple in structure, and ensures that the air speed of a combustor outlet can not be reduced linearly when the combustor air amount is reduced.
Description
Technical field
The invention belongs to power equipment systems technology field, relate in particular to a kind of pulverized-fuel boiler two-channel after-flame wind or Secondary Air burner apparatus.
Background technology
In pulverized-coal fired boiler, there is Secondary Air, for providing coal dust firing necessary air; In the pulverized-coal fired boiler of employing air classification low NOx combusting technology, also there is separated secondary wind, i.e. after-flame wind.When boiler load variation or low NOx combustion adjustment, Secondary Air and/or after-flame wind air quantity can corresponding adjustment.Current Secondary Air, after-flame wind are single channel structure, when air quantity changes, the corresponding linear change of burner outlet wind speed meeting, when wind speed decreased is larger, can have influence on Furnace Aerodynamic Field structure, thereby affect boiler efficiency, NOx generation concentration, boiler operating parameter etc., even cause the problems such as slagging scorification, high temperature corrosion.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, a kind of pulverized-fuel boiler two-channel after-flame wind or Secondary Air burner apparatus are provided.
The technical solution adopted for the present invention to solve the technical problems is:
Apparatus of the present invention comprise double-channel spray nozzle, binary channels air channel, binary channels dividing plate, two-door-linkage air door, damper, single channel air channel; Double-channel spray nozzle is connected with one end, binary channels air channel, and connected mode can be welded type or swing type; The binary channels air channel other end is connected with one end of two-door-linkage air door; In two-door-linkage air door, be provided with 2 dampers, 2 dampers moving axis synchronous rotary that rotates, and the passage in corresponding binary channels air channel respectively; The other end of two-door-linkage air door is connected with the one end in single channel air channel; The total air channel of another termination in single channel air channel;
Described binary channels air channel consists of conventional passage dress binary channels dividing plate, separates 2 channel cross-sectional flow areas in rear binary channels air channel than being 2:3～3:2.
The axis at described 2 damper turning cylinder places and the distance L in binary channels air channel, the vertical range of axis and binary channels dividing plate end points, is determined by damper designed inclination angle α and binary channels air channel circulation area ratio; Damper designed inclination angle refer to damper rotate to binary channels dividing plate over against time angle, damper designed inclination angle α is 30 °～60 °.
Beneficial effect of the present invention is as follows:
When regulating after-flame wind or Secondary Air air quantity, the unequal adjusting of air quantity in binary channels air channel, one of them passage keeps higher wind speed, thereby guarantees that after-flame wind or Secondary Air have better penetration power, promote that coal dust fully mixes with air, make more fully after-flame of coal dust.Apparatus of the present invention are simple in structure, do not change existing operation mode, when reducing burner air quantity, can guarantee that burner outlet wind speed can linearly not decline, and keep higher wind speed.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
In figure: double-channel spray nozzle 1, binary channels air channel 2, binary channels dividing plate 3, two-door-linkage air door 4, damper 5, single channel air channel 6.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, apparatus of the present invention comprise double-channel spray nozzle 1, binary channels air channel 2, binary channels dividing plate 3, two-door-linkage air door 4, damper 5, single channel air channel 6; Double-channel spray nozzle 1 is connected with 2 one end, binary channels air channel, and connected mode can be welded type or swing type; Binary channels air channel 2 other ends are connected with one end of two-door-linkage air door 4; In two-door-linkage air door 4, be provided with 5,2 dampers 5 of 2 dampers moving axis synchronous rotary that rotates, and the passage in corresponding binary channels air channel 2 respectively; The other end of two-door-linkage air door 4 is connected with the one end in single channel air channel 6; The total air channel of another termination in single channel air channel 6;
Described binary channels air channel 2 consists of conventional passage dress binary channels dividing plate 3, separates 2 channel cross-sectional flow areas in rear binary channels air channel 2 than being 2:3～3:2.
The axis at described 2 damper 5 turning cylinder places and the distance L in binary channels air channel 2, the vertical range of axis and binary channels dividing plate 3 end points, is determined by damper designed inclination angle α and binary channels air channel circulation area ratio; Damper designed inclination angle α refer to damper 5 rotate to binary channels dividing plate 3 over against time angle, damper designed inclination angle α is 30 °～60 °.
When damper standard-sized sheet, binary channels air channel evenly ventilates; When turning down baffle opening gradually, only reduce the air quantity of a passage in binary channels air channel, the wind speed of another passage is substantially constant even higher wind speed.When damper aperture turns down to damper designed inclination angle position, or while surpassing damper designed inclination angle position, substantially only have a passage to ventilate, another passage only has a small amount of wind with cooling jet.
When the present invention is used for after-flame wind, it is binary channels combustion exhausted wind apparatus; During for Secondary Air, it is binary channels overfire air device.
Claims (1)
1. pulverized-fuel boiler two-channel after-flame wind or Secondary Air burner apparatus, is characterized in that: comprise double-channel spray nozzle, binary channels air channel, binary channels dividing plate, two-door-linkage air door, damper, single channel air channel; Double-channel spray nozzle is connected with one end, binary channels air channel, and connected mode is welded type or swing type; The binary channels air channel other end is connected with one end of two-door-linkage air door; In two-door-linkage air door, be provided with 2 dampers, 2 dampers moving axis synchronous rotary that rotates, and the passage in corresponding binary channels air channel respectively; The other end of two-door-linkage air door is connected with the one end in single channel air channel; The total air channel of another termination in single channel air channel;
Described binary channels air channel consists of conventional passage dress binary channels dividing plate, separates 2 channel cross-sectional flow areas in rear binary channels air channel than being 2:3～3:2;
The axis at described 2 damper turning cylinder places and the distance L in binary channels air channel, the vertical range of axis and binary channels dividing plate end points, is determined by damper designed inclination angle α and binary channels air channel circulation area ratio; Damper designed inclination angle refer to damper rotate to binary channels dividing plate over against time angle, damper designed inclination angle α is 30 °～60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210055682.7A CN102563638B (en) | 2012-03-06 | 2012-03-06 | Pulverized-fuel boiler two-channel over-fire air or secondary air combustor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210055682.7A CN102563638B (en) | 2012-03-06 | 2012-03-06 | Pulverized-fuel boiler two-channel over-fire air or secondary air combustor device |
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| Publication Number | Publication Date |
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| CN102563638A CN102563638A (en) | 2012-07-11 |
| CN102563638B true CN102563638B (en) | 2014-01-29 |
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| CN201210055682.7A Active CN102563638B (en) | 2012-03-06 | 2012-03-06 | Pulverized-fuel boiler two-channel over-fire air or secondary air combustor device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504479B (en) * | 2017-08-30 | 2023-07-11 | 大唐东北电力试验研究所有限公司 | Combustor transformation device for solving low pressure of large bellows of low NOx combustor |
| CN110285442A (en) * | 2019-06-24 | 2019-09-27 | 亿利洁能科技（宿迁）有限公司 | Fine coal ash handling equipment |
| CN110834180B (en) * | 2019-11-15 | 2022-05-13 | 无锡华能热能设备有限公司 | Assembling and welding processing technology for boiler pulverized coal burner |
| CN113251433A (en) * | 2021-03-17 | 2021-08-13 | 西安交通大学 | Rotatable square overgrate air baffle |
| CN113776078B (en) * | 2021-07-26 | 2022-07-12 | 西安交通大学 | Secondary air duct with variable air speed |
| CN115493136A (en) * | 2022-09-21 | 2022-12-20 | 西安热工研究院有限公司 | Deep-adjustment-mode lower furnace internal aerodynamic field optimization device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326859Y (en) * | 1997-11-21 | 1999-06-30 | 徐则林 | Secondary-wind adjustable-section nozzle of boiler spray-combustor |
| CN101806450A (en) * | 2010-04-20 | 2010-08-18 | 哈尔滨工业大学 | Over-fire-air device for different load pulverized-coal fired boilers |
| CN102022749A (en) * | 2010-12-31 | 2011-04-20 | 广东理文造纸有限公司 | Boiler draught fan system |
| CN202501456U (en) * | 2012-03-06 | 2012-10-24 | 浙江大学 | Pulverized coal boiler dual-channel overfire air or secondary air combustor device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042364B2 (en) * | 1979-11-08 | 1985-09-21 | 三菱重工業株式会社 | boiler combustion equipment |
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2012
- 2012-03-06 CN CN201210055682.7A patent/CN102563638B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326859Y (en) * | 1997-11-21 | 1999-06-30 | 徐则林 | Secondary-wind adjustable-section nozzle of boiler spray-combustor |
| CN101806450A (en) * | 2010-04-20 | 2010-08-18 | 哈尔滨工业大学 | Over-fire-air device for different load pulverized-coal fired boilers |
| CN102022749A (en) * | 2010-12-31 | 2011-04-20 | 广东理文造纸有限公司 | Boiler draught fan system |
| CN202501456U (en) * | 2012-03-06 | 2012-10-24 | 浙江大学 | Pulverized coal boiler dual-channel overfire air or secondary air combustor device |
Non-Patent Citations (1)
| Title |
|---|
| JP昭56-68705A 1981.06.09 |
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