CN104197326A - Novel swirl pulverized coal burner - Google Patents
Novel swirl pulverized coal burner Download PDFInfo
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- CN104197326A CN104197326A CN201410334837.XA CN201410334837A CN104197326A CN 104197326 A CN104197326 A CN 104197326A CN 201410334837 A CN201410334837 A CN 201410334837A CN 104197326 A CN104197326 A CN 104197326A
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Abstract
A novel swirl pulverized coal burner comprises a primary air duct, an internal swirl secondary air duct, an external swirl secondary air duct and an external direct-flow secondary air duct, swirl blades are arranged in the internal swirl secondary air duct and the external swirl secondary air duct, a triangular tooth-shaped stable-combustion ring and a conical expanding opening are arranged on an outlet of the primary air duct, conical expanding openings are formed in an outlet of the internal swirl secondary air duct and an outlet of the external swirl secondary air duct, a wedge body concentrator is arranged in the primary air duct, and an ignition oil gun is arranged in the external swirl secondary air duct. A pulverized coal concentration device simple in structure is adopted to achieve primary wind powder air flow intensity separation, three secondary air channels are adopted, and therefore efficient steady burning of low-volatile coal is ensured, emissions of NOx are further reduced, meanwhile, it is ensured that slag bonding and high-temperature corrosion do not happen to a combustion chamber, and efficient low-nitrogen safe running of a combustible low-volatile coal boiler unit is achieved.
Description
Technical field
The invention belongs to field of combustion technology, relate to a kind of New-type Swirl Flow coal burner, particularly the vortex burner of the multistage stagewise of a kind of radially deep or light formula Secondary Air.
Background technology
Power industry is basic energy industry, and current coal-fired thermal power generation accounts for the more than 70% of China's gross generation.China is just greatly developing nuclear energy power generation and various generation of electricity by new energy technology at present, but rich coal resources in China, the factor impacts such as the construction of nuclear power station cycle is long, can only be with base load and generation of electricity by new energy cost is higher, single-machine capacity is little, so remain the major way of China's generating in following one section of long period internal combustion coal thermal power generation.
High-efficiency low-pollution coal fired power generation technology is the developing direction of coal-fired thermal power generation, the function such as simultaneously realize efficient, low nitrogen (NOx), Anti-slagging, high temperature corrosion resistance, low-load combustion-stabilizing ability is strong, coal adaptability is good of will burning.For reaching this object, developed at present multiple high-efficiency low-pollution vortex burner.The high-efficiency low-pollution vortex burner common trait proposing is at present that secondary air channel is divided into inside and outside two passages, interior outer second air can regulate respectively, inside and outside two strands of Secondary Airs can be all vortex gas-flow, and also can adopt inner second air is the form that vortex gas-flow, outer second air are straight-flow air; The two tune wind combustor wherein adopting except Beijing Ba Wei company (BB & W), other several turbulent burners have all adopted the deep or light isolation technics of primary wind and powder air-flow.
Existing high-efficiency low-pollution vortex burner has been obtained certain effect at aspects such as efficient, low-nitrogen discharged, steady combustions, but the ubiquity coal adaptability problem such as comparatively serious, NOx emission reduction efficiency is not high, partial combustion device central tube serious wear of strong (being difficult to be applicable to the anthracite meager coal of low volatile), high temperature corrosion and coking not.China's coal in power plant is changeable, and the power plant that uses low-volatite coal increases day by day, adds environmental regulation increasingly stringent (requirement can significantly reduce discharged nitrous oxides), develops a kind of New-type Swirl Flow coal burner and seems particularly important to adapt to these requirements.
Summary of the invention
The object of the invention is the problem and shortage existing for above-mentioned existing vortex burner, propose that a kind of new and effective, low nitrogen, coal are applied widely, the swirling pulverized coal combustion device of safe operation, this device adopts Pulverized Coal Concentration device simple in structure to realize the deep or light separation of primary wind and powder air-flow, three secondary air channels have been adopted, to guarantee the efficient steady combustion of low-volatite coal, further reduce the discharge of NOx, to guarantee not slagging scorification of burner hearth and produce high temperature corrosion etc. simultaneously, thereby realize efficient, low nitrogen, the safe operation that uses low-volatite coal boiler unit.
For achieving the above object, technical scheme of the present invention is: a kind of New-type Swirl Flow coal burner, comprise an air channel (1), inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3), in described inward eddy secondary air duct (4), be furnished with the first swirl vane (11) and the first adjusting yoke (13), in described outer eddy flow secondary air duct (2), be furnished with the second swirl vane (9) and the second adjusting yoke (12), in described exit, an air channel (1), be furnished with triangular tooth and surely fire ring (8) and the first taper enlarging (7), inward eddy secondary air duct (4) exit is furnished with the second taper enlarging (6), the exit of outer eddy flow secondary air duct (2) is furnished with triconic enlarging (5), in a described air channel (1), be furnished with wedge inspissator (10), in described outer direct-current secondary air channel (3), be furnished with torch oil gun (14),
In an air channel (1), front end is provided with wedge pulverized coal concentrator (10) near exit, and breeze airflow is divided into two strands in radial direction, and inside is thick coal culm air-flow, and outside is thin powdered coal air-flow, has realized bias combustion; In described New-type Swirl Flow coal burner, have three layers of secondary air duct, be respectively inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3), the swirl vane (9) (11) that wherein in inward eddy secondary air duct (4), outer eddy flow secondary air duct, (2) are arranged adopts adjustable, and tertiary air road air quantity can regulate by import baffle plate; At a ducting outlet place, be furnished with steady combustion ring (8), be shaped as triangular tooth; Exit at a described air channel, inward eddy secondary air duct, outer eddy flow secondary air duct is furnished with taper enlarging.
Further, secondary air duct is radially divided into inward eddy secondary air duct (4) from inside to outside, outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3).
Further, the first and second swirl vanes (9) (11) that in inward eddy secondary air duct (4), outer eddy flow secondary air duct, (2) are arranged adopt adjustable swirl vane.
Further, torch oil gun (14) is arranged in top, outer direct-current secondary air channel (3) with certain downtilt angles.
The present invention is according to there being following technical characterstic: (1) the present invention has adopted wedge pulverized coal concentrator, triangular tooth surely to fire after ring and taper enlarging in an air channel, realize pulverized coal bias combustion, contributed to efficient burning and the low-load combustion-stabilizing of low volatile coal dust.(2) the present invention has arranged that at middle outlet place, an air channel triangular tooth surely fires ring, thereby has set up suitable high temperature recirculation zone outward at burner outlet, is conducive to coal dust, and particularly low volatile coal dust catches fire and smooth combustion.(3) burner of the present invention has good fuel tolerance and Load Regulation.During load variations, first can be by regulating independently wind-box damper to regulate the air quantity ratio in three layers of secondary air duct; Can regulate the angle of the swirl vane of arranging in inward eddy secondary air duct, outer eddy flow secondary air duct to change swirl strength; Owing to having adopted direct current tertiary air, finning in the time of can avoiding underrun, is conducive to low-load combustion-stabilizing.(4) burner of the present invention has adopted three layers of secondary air duct, has realized burner region degree of depth Researched of Air Staging Combustion Burning Pulverized Coal (radial air classification); The exit of inward eddy secondary air duct, outer eddy flow secondary air duct adopts taper enlarging simultaneously, can postpone the time that Secondary Air is sneaked into primary wind and powder air-flow.These measures have formed catching fire of reproducibility and combustion atmosphere, contribute to significantly to reduce the discharge of nitrogen oxide.(5) burner of the present invention has adopted tertiary air road (outer direct-current secondary air channel), contributes to pressing close to water-cooling wall place formation selective oxidation atmosphere, thereby has effectively avoided water-cooling wall slagging scorification and High Temperature Corrosion, has improved the security of operation.(6) burner of the present invention has been cancelled central tube, has avoided the problem of central tube serious wear, thereby has further improved the security of operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of New-type Swirl Flow coal burner provided by the invention
Fig. 2 is the right view of Fig. 1
The specific embodiment
For further clear, understand the present invention, by reference to the accompanying drawings 1 and accompanying drawing 2, describe structure of the present invention, operation principle and embodiment in detail.
Fig. 1 and Fig. 2 are the structural representations of a kind of New-type Swirl Flow coal burner of the present invention.It comprises air channel 1 one time, inward eddy secondary air duct 4, outer eddy flow secondary air duct 2, tertiary air road (outer direct-current secondary air channel) 3, in described inward eddy secondary air duct 4, be furnished with swirl vane 11 and adjusting yoke 13, in described outer eddy flow secondary air duct 2, be furnished with swirl vane 9 and adjusting yoke 12, at a described ducting outlet place, be furnished with triangular tooth and surely fire ring 8 and taper enlarging 7, inward eddy secondary air duct 4 exits are furnished with taper enlarging 6, the exit of outer eddy flow secondary air duct 2 is furnished with taper enlarging 5, in a described air channel 1, be furnished with wedge inspissator 10, in described tertiary air road (outer direct-current secondary air channel) 3, be furnished with torch oil gun 14.
Its operation principle is:
(1) in an air channel, adopt wedge pulverized coal concentrator 10, triangular tooth surely to fire ring 8 and taper enlarging 7, thereby realized radially bias combustion of interior dense outer light coal dust, contributed to efficient burning and the low-load combustion-stabilizing of low volatile coal dust.
(2) in inward eddy secondary air duct 4, be furnished with swirl vane 11 and adjusting yoke 13, in swirl secondary air road 2, be furnished with outside swirl vane 9 and adjusting yoke 12, can regulate the angle of swirl vane to change swirl strength by adjusting yoke, thereby change the size of recirculating zone, reach and change ignition point and the object of fire intensity.Can adapt to preferably the variation of coal and load.
(3) at middle outlet place, an air channel, arranged that triangular tooth surely fires ring 8, after tooth, formed and stay whirlpool, be beneficial to and catch fire; In burner outlet has been set up suitable high temperature recirculation zone outward and strengthened dense powder stream and high temperature recirculation zone, the mixing of flue gas, is conducive to coal dust, and particularly low volatile coal dust catches fire and smooth combustion; Can increase dense powder stream circumferential length, further strengthen mixing, be beneficial to coal dust, particularly low volatile coal dust catches fire and smooth combustion.
(4) adopted direct current tertiary air passage 3, finning in the time of can avoiding underrun, is conducive to low-load combustion-stabilizing; Contribute to pressing close to water-cooling wall place formation selective oxidation atmosphere, thereby effectively avoided water-cooling wall slagging scorification and High Temperature Corrosion, improved the security of operation.
(5) adopt three layers of secondary air duct, thereby realized radially multi-staged air fractional combustion of burner region, formed catching fire and combustion atmosphere of reproducibility, contributed to significantly to reduce the discharge of nitrogen oxide.
(6) exit of inward eddy secondary air duct 4, outer eddy flow secondary air duct 2 adopts taper enlarging 6 and 5, thereby postpones the time that Secondary Air is sneaked into primary wind and powder air-flow, further reduces the discharge of nitrogen oxide.
The present invention is mainly applicable to big-and-middle-sized generating plant pulverized coal boiler.A kind of New-type Swirl Flow coal burner of the present invention has that efficiency of combustion is high, coal and load adaptability is strong, flexible adjustment, can the degree of depth deviate from nitrogen oxide, the feature such as safe and reliable to operation,
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a New-type Swirl Flow coal burner, comprise an air channel (1), inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3), in described inward eddy secondary air duct (4), be furnished with the first swirl vane (11) and the first adjusting yoke (13), in described outer eddy flow secondary air duct (2), be furnished with the second swirl vane (9) and the second adjusting yoke (12), in described exit, an air channel (1), be furnished with triangular tooth and surely fire ring (8) and the first taper enlarging (7), inward eddy secondary air duct (4) exit is furnished with the second taper enlarging (6), the exit of outer eddy flow secondary air duct (2) is furnished with triconic enlarging (5), in a described air channel (1), be furnished with wedge inspissator (10), in described outer direct-current secondary air channel (3), be furnished with torch oil gun (14),
It is characterized in that: in an air channel (1), front end is provided with wedge pulverized coal concentrator (10) near exit, breeze airflow is divided into two strands in radial direction, and inside is thick coal culm air-flow, and outside is thin powdered coal air-flow, has realized bias combustion; In described New-type Swirl Flow coal burner, have three layers of secondary air duct, be respectively inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3), the swirl vane (9) (11) that wherein in inward eddy secondary air duct (4), outer eddy flow secondary air duct, (2) are arranged adopts adjustable, and tertiary air road air quantity can regulate by import baffle plate; At a ducting outlet place, be furnished with steady combustion ring (8), be shaped as triangular tooth; Exit at a described air channel, inward eddy secondary air duct, outer eddy flow secondary air duct is furnished with taper enlarging.
2. a kind of New-type Swirl Flow coal burner according to claim 1, is characterized in that: secondary air duct is radially divided into inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3) from inside to outside.
3. a kind of New-type Swirl Flow coal burner according to claim 1, is characterized in that: the first and second swirl vanes (9) (11) that in inward eddy secondary air duct (4), outer eddy flow secondary air duct, (2) are arranged adopt adjustable swirl vane.
4. a kind of New-type Swirl Flow coal burner according to claim 1, is characterized in that: torch oil gun (14) is arranged in top, outer direct-current secondary air channel (3) with certain downtilt angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410334837.XA CN104197326A (en) | 2014-07-15 | 2014-07-15 | Novel swirl pulverized coal burner |
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| CN201410334837.XA CN104197326A (en) | 2014-07-15 | 2014-07-15 | Novel swirl pulverized coal burner |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832918A (en) * | 2015-05-05 | 2015-08-12 | 集美大学 | Novel cyclone bias pulverized coal burner |
| CN105485709A (en) * | 2016-01-05 | 2016-04-13 | 上海发电设备成套设计研究院 | Adjustable coal dust distributor |
| CN105782966A (en) * | 2016-03-15 | 2016-07-20 | 华中科技大学 | Dual-mode pulverized coal burner and boiler burner system |
| CN107575861A (en) * | 2017-10-09 | 2018-01-12 | 上海锅炉厂有限公司 | A kind of Industrial Boiler coal burner of wide coal adaptability |
| CN108386841A (en) * | 2018-05-04 | 2018-08-10 | 江苏凤谷节能科技有限公司 | A kind of big momentum combustion combustor of multi-stage, energy-saving |
| CN109737393A (en) * | 2019-02-19 | 2019-05-10 | 沈阳环境科学研究院 | Big Pulverized Coal Concentration is than postponing hybrid vortex burner |
| CN110285411A (en) * | 2019-06-27 | 2019-09-27 | 国电龙源节能技术有限公司 | The low NO of coal-burning power plant's burning inferior coalXBurner |
| CN111442263A (en) * | 2020-04-16 | 2020-07-24 | 哈尔滨锅炉厂有限责任公司 | Cyclone burner suitable for pulverized coal concentration separation of lignite |
| CN113007705A (en) * | 2021-04-08 | 2021-06-22 | 煤科院节能技术有限公司 | Burner capable of burning various powder fuels |
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| CN2373685Y (en) * | 1999-05-12 | 2000-04-12 | 哈尔滨工业大学 | Inertial gradation vortex coal powder burner |
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| US20130112120A1 (en) * | 2011-05-27 | 2013-05-09 | Yuehua Li | Dense Phase Swirl Pulverized Coal Burner |
| CN203980272U (en) * | 2014-07-15 | 2014-12-03 | 北京神雾环境能源科技集团股份有限公司 | A kind of New-type Swirl Flow coal burner |
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2014
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Patent Citations (6)
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| CN2373685Y (en) * | 1999-05-12 | 2000-04-12 | 哈尔滨工业大学 | Inertial gradation vortex coal powder burner |
| CN1598403A (en) * | 2004-09-10 | 2005-03-23 | 清华大学 | Circularly shirl coal powder burn device with various concentration coal powder pipe |
| CN101949542A (en) * | 2010-04-14 | 2011-01-19 | 华中科技大学 | Three-layered secondary air low nitrogen oxide swirl burner |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832918A (en) * | 2015-05-05 | 2015-08-12 | 集美大学 | Novel cyclone bias pulverized coal burner |
| CN105485709A (en) * | 2016-01-05 | 2016-04-13 | 上海发电设备成套设计研究院 | Adjustable coal dust distributor |
| CN105782966A (en) * | 2016-03-15 | 2016-07-20 | 华中科技大学 | Dual-mode pulverized coal burner and boiler burner system |
| CN107575861A (en) * | 2017-10-09 | 2018-01-12 | 上海锅炉厂有限公司 | A kind of Industrial Boiler coal burner of wide coal adaptability |
| CN108386841A (en) * | 2018-05-04 | 2018-08-10 | 江苏凤谷节能科技有限公司 | A kind of big momentum combustion combustor of multi-stage, energy-saving |
| CN109737393A (en) * | 2019-02-19 | 2019-05-10 | 沈阳环境科学研究院 | Big Pulverized Coal Concentration is than postponing hybrid vortex burner |
| CN109737393B (en) * | 2019-02-19 | 2024-02-27 | 沈阳环境科学研究院 | Large coal powder concentration ratio postpone mixed type cyclone coal powder burner |
| CN110285411A (en) * | 2019-06-27 | 2019-09-27 | 国电龙源节能技术有限公司 | The low NO of coal-burning power plant's burning inferior coalXBurner |
| CN111442263A (en) * | 2020-04-16 | 2020-07-24 | 哈尔滨锅炉厂有限责任公司 | Cyclone burner suitable for pulverized coal concentration separation of lignite |
| CN113007705A (en) * | 2021-04-08 | 2021-06-22 | 煤科院节能技术有限公司 | Burner capable of burning various powder fuels |
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