CN103017161B - A kind of vortex burner - Google Patents
A kind of vortex burner Download PDFInfo
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- CN103017161B CN103017161B CN201210553643.XA CN201210553643A CN103017161B CN 103017161 B CN103017161 B CN 103017161B CN 201210553643 A CN201210553643 A CN 201210553643A CN 103017161 B CN103017161 B CN 103017161B
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Abstract
The present invention relates to a kind of vortex burner, comprise First air passage, the inner second air passage of axial rotational flow and outer second air passage that is tangential or axial rotational flow, outer second air passage is positioned at the periphery of inner second air passage, it is characterized in that: have cylindrical central sleeve structure in the center arrangement of First air passage; The conically shaped that cylindrical central sleeve structure comprises central tube structure and can move forward and backward in the axial direction, conically shaped is positioned at the front end of central tube structure, by the sectional area of the First air spout of conically shaped movable change First air passage in the axial direction; The import of inner second air passage is divided into Whirl deposite tank import air channel and direct current wind inlet air channel; Cyclone is provided with outside in secondary air channel.The present invention is applied in boiler full burner hearth air classification low-nitrogen oxide discharging technology, has tunable performance good, the feature that steady combustion property of catching fire is strong, regulates, improve the burn-up efficiency in primary zone to change coal operating mode is convenient.
Description
Technical field
The present invention relates to a kind of generating plant pulverized coal boiler vortex burner.
Background technology
Along with country to coal-fired power station boiler discharged nitrous oxides control strict, be the effective nitrogen oxide that produces of reduction burning in stove, generally have employed full burner hearth grading combustion technology.A part for meeting the oxygen amount that after-flame is sent into from primary combustion zone (coal dust sends into the burner region of burner hearth) is postponed to send into burner hearth from the air port that upper furnace is special, the aerochemistry equivalent proportion in primary zone is made to be less than 1, namely anoxycausis atmosphere is formed, between primary zone and air port, top (burning-out zone), form reducing atmosphere region, the initial stage nitrogen oxide of making fully is reduced.Meanwhile, the vortex burner that wall-boiler is applied also adopts multichannel air stage feeding form mostly, controls the mixing opportunity of wind powder, forms the reducing atmosphere of burner region, reaches the object that burner region reduces nitrogen oxide.
At present when applying above-mentioned technology, needing the oxygen amount of full burner hearth 20-40% to send into burner hearth by after-flame air port, top, thus reducing the secondary air flow of burner region feeding.The reduction of burner region secondary air flow makes its regulating power utilizing Secondary Air decline, particularly under the actual conditions that current coal in power plant is changeable, easily cause swirl strength adjusting function poor, diameter and the length of spout recirculating zone often do not reach requirement, thus in the process controlling nitrogen oxide, catch fire steady combustion and after-flame of burning initial stage can not be met the demands, and produce boiler efficiency reduction, the problems such as spray water flux sharp increase.
Summary of the invention
The object of this invention is to provide a kind of convenient vortex burner regulating the performance in Secondary Air discharge swirl intensity and flow field.
In order to achieve the above object, technical scheme of the present invention there is provided a kind of vortex burner, comprise First air passage, the inner second air passage of axial rotational flow and outer second air passage that is tangential or axial rotational flow, outer second air passage is positioned at the periphery of inner second air passage, it is characterized in that: have cylindrical central sleeve structure in the center arrangement of First air passage; The conically shaped that cylindrical central sleeve structure comprises central tube structure and can move forward and backward in the axial direction, conically shaped is positioned at the front end of central tube structure, by the sectional area of the First air spout of conically shaped movable change First air passage in the axial direction; The import of inner second air passage is divided into Whirl deposite tank import air channel and direct current wind inlet air channel; Cyclone is provided with outside in secondary air channel.
Preferably, described cylindrical central sleeve structure comprises center urceolus and is positioned at the center inner core of center urceolus, and the front end of center inner core is located at by described conically shaped; End and the conically shaped of pull bar are connected and fixed, and drive conically shaped to move forward and backward in the axial direction by pull bar; For the air inlet regulating the control valve of air quantity to be located at center inner core.
Preferably, described conically shaped movable distance is in the axial direction 0 ~ 200mm.
Preferably, in described Whirl deposite tank import air channel, axial restraint swirl vane is provided with; Volume damper is provided with in described direct current wind passage.
Preferably, the channel outlet of described First air passage, described inner second air passage and described outer second air passage extends out and forms conically shaped one, conically shaped two and conically shaped three respectively.
Preferably, the reamer angle of described conically shaped one, described conically shaped two and described conically shaped three is 10 ° ~ 35 °.
The present invention arranges central wind-tube in burner First air passage, axially movable at burner by the conical sleeve arranging central tube front end, the sectional area of First air spout can be changed, thus be in operation and First air muzzle velocity can be made to change, to meet ature of coal or the more cataclysmal requirement of operating mode.In central tube, pass into the centre wind that flow is controlled, large I convenient position and the size regulating spout recirculating zone within the specific limits of center air quantity, is conducive to the initial stage ignition and steady combustion of coal dust.Burner secondary air separating is axial rotational flow inner second air and tangential (or axial) eddy flow outer second air structure.Wherein interior secondary import air channel is separated into binary channels again, and being the Whirl deposite tank import air channel of axial restraint blade near air duct periphery, is direct current wind inlet air channel in periphery, Whirl deposite tank import air channel.By the intake conveniently adjusted Secondary Air discharge swirl intensity of adjustment direct current wind and the performance in flow field, and fixing axial blade it also avoid the difficulty run easy card plucked instrument and be difficult to overhaul.
The present invention has stronger change coal adaptive capacity.For the change of coal, by the movement of center outer cylinder front end conically shaped in axis, can conveniently change First air discharge area, thus change primary air velocity to adapt to the needs of coal varitation.Simultaneously, by the size of adjustment centre wind inner core air quantity, position and the size of spout central recirculating zone can be adjusted in certain limit, regulating power in conjunction with secondary wind swirl intensity strengthens, make burner outlet can obtain the recirculating zone matched with coal, when territory, primary zone oxygen amount is lower than stoichiometric ratio, enhance catch fire steady combustion and after-flame performance that coal dust is early stage.
The present invention is applied in boiler full burner hearth air classification low-nitrogen oxide discharging technology, has tunable performance good, the feature that steady combustion property of catching fire is strong, regulates, improve the burn-up efficiency in primary zone to change coal operating mode is convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of vortex burner provided by the invention;
The structural representation of barrel structure centered by Fig. 2.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Consult Fig. 1, vortex burner provided by the invention comprises First air passage 1, the outer second air passage 3 of the inner second air passage 2 of axial rotational flow and outermost tangential or axial rotational flow.Inner second air passage 2 and outer second air passage 3 are positioned at same large bellows inner air-distributing.First air passage 1 center arrangement has central wind-tube structure, and the outlet of First air passage 1 extends out and forms conical sleeve one 1-6.
Composition graphs 2, central wind-tube structure by center urceolus 1-1, center inner core 1-3, be positioned at urceolus 1-1 front end, center conically shaped 1-2, move for conically shaped 1-2 adjustment pull bar 1-4 and be positioned at center inner core 1-3 import for regulating the control valve 1-5 of air quantity to form.Conically shaped 1-2 can be axially movable along burner by pull bar 1-4, the conically shaped position 1-2-1 of urceolus 1-1 front end, center is for installing initial position, conically shaped position 1-2-2 is the optional position in conically shaped 1-2 moving process, it is 100 ~ 200mm that conically shaped 1-2 moves ultimate range, thus change First air discharge area, reach the object regulating First air air outlet velocity.The change of center air quantity simultaneously can make the position of spout recirculating zone and size be effectively controlled.
The inner second air passage 2 in First air passage 1 peripheral disposition, inner second air passage 2 also comprises axial rotational flow wind inlet air channel 2-1, direct current wind inlet air channel 2-2, direct current wind inlet volume damper 2-3 and secondary air duct and exports conical sleeve two 2-4 extended out and form.By arranging fixing axial blade, avoiding in moving vane running and regulating card plucked instrument problem.By the swirl strength regulating the intake of direct current wind conveniently can adjust inner second air outlet, thus control the mixing of Secondary Air and First air/breeze airflow, adapt to the needs that change coal is run.
At the inner second air passage 2 peripheral disposition outer second air passage 3 of said burner, also comprise cyclone 3-1 in secondary air channel 3 and export conical sleeve three 3-2 extended out.The setting of outer second air passage 3 is used for the oxygen amount of supplementary burner spout after burning, makes burner region wall-cooling surface be in oxidizing atmosphere simultaneously.
Claims (5)
1. a vortex burner, comprise First air passage (1), the inner second air passage (2) of axial rotational flow and outer second air passage (3) that is tangential or axial rotational flow, outer second air passage (3) is positioned at the periphery of inner second air passage (2), it is characterized in that: have cylindrical central sleeve structure in the center arrangement of First air passage (1); The conically shaped (1-2) that cylindrical central sleeve structure comprises central tube structure and can move forward and backward in the axial direction, conically shaped (1-2) is positioned at the front end of central tube structure, by the sectional area of the First air spout of conically shaped (1-2) movable change First air passage (1) in the axial direction; The import of inner second air passage (2) is divided into Whirl deposite tank import air channel (2-1) and direct current wind inlet air channel (2-2); Cyclone (3-1) is provided with outside in secondary air channel (3); Described central tube structure comprises center urceolus (1-1) and is positioned at the center inner core (1-3) of center urceolus (1-1), and the front end of center inner core (1-3) is located at by described conically shaped (1-2); End and the conically shaped (1-2) of pull bar (1-4) are connected and fixed, and drive conically shaped (1-2) to move forward and backward in the axial direction by pull bar (1-4); For the air inlet regulating the control valve of air quantity (1-5) to be located at center inner core (1-3).
2. a kind of vortex burner as claimed in claim 1, is characterized in that: described conically shaped (1-2) movable distance is in the axial direction 0 ~ 200mm.
3. a kind of vortex burner as claimed in claim 1, is characterized in that: in described Whirl deposite tank import air channel (2-1), be provided with axial restraint swirl vane; Volume damper (2-3) is provided with in described direct current wind inlet air channel (2-2).
4. a kind of vortex burner as claimed in claim 1, is characterized in that: the channel outlet of described First air passage (1), described inner second air passage (2) and described outer second air passage (3) extends out and forms conically shaped one (1-6), conically shaped two (2-4) and conically shaped three (3-2) respectively.
5. a kind of vortex burner as claimed in claim 4, is characterized in that: the reamer angle of described conically shaped one (1-6), described conically shaped two (2-4) and described conically shaped three (3-2) is 10 ° ~ 35 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210553643.XA CN103017161B (en) | 2012-12-19 | 2012-12-19 | A kind of vortex burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210553643.XA CN103017161B (en) | 2012-12-19 | 2012-12-19 | A kind of vortex burner |
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| CN103017161A CN103017161A (en) | 2013-04-03 |
| CN103017161B true CN103017161B (en) | 2016-02-03 |
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| CN201210553643.XA Active CN103017161B (en) | 2012-12-19 | 2012-12-19 | A kind of vortex burner |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105132685A (en) * | 2015-10-05 | 2015-12-09 | 杨伟燕 | Suspension smelting nozzle |
| CN107062226B (en) * | 2017-05-23 | 2023-10-17 | 北京市热力集团有限责任公司 | High-temperature flue gas large-backflow low-nitrogen combustor |
| CN107477573B (en) * | 2017-09-21 | 2019-04-16 | 哈尔滨工业大学 | A kind of burner of the spray ammonia of the heart in the burner for industrial coal powder boiler |
| CN108613184B (en) * | 2018-06-14 | 2023-10-13 | 华能国际电力股份有限公司 | Combustor capable of adjusting load and working method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920382A (en) * | 2006-09-04 | 2007-02-28 | 东方锅炉（集团）股份有限公司 | Rotational flow pulverized coal burner |
| CN102062396A (en) * | 2010-10-13 | 2011-05-18 | 西安交通大学 | Composite concentration triple-wind-regulating low-NOx cyclone pulverized-coal burner |
| CN102506426A (en) * | 2012-01-04 | 2012-06-20 | 山东中实易通集团有限公司 | Variable-section cyclone burner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2522583B2 (en) * | 1990-04-27 | 1996-08-07 | 株式会社日立製作所 | Pulverized coal combustion method and pulverized coal boiler |
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- 2012-12-19 CN CN201210553643.XA patent/CN103017161B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1920382A (en) * | 2006-09-04 | 2007-02-28 | 东方锅炉（集团）股份有限公司 | Rotational flow pulverized coal burner |
| CN102062396A (en) * | 2010-10-13 | 2011-05-18 | 西安交通大学 | Composite concentration triple-wind-regulating low-NOx cyclone pulverized-coal burner |
| CN102506426A (en) * | 2012-01-04 | 2012-06-20 | 山东中实易通集团有限公司 | Variable-section cyclone burner |
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| CN103017161A (en) | 2013-04-03 |
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