CN201517769U - Swirl burner - Google Patents

Swirl burner Download PDF

Info

Publication number
CN201517769U
CN201517769U CN2009203126468U CN200920312646U CN201517769U CN 201517769 U CN201517769 U CN 201517769U CN 2009203126468 U CN2009203126468 U CN 2009203126468U CN 200920312646 U CN200920312646 U CN 200920312646U CN 201517769 U CN201517769 U CN 201517769U
Authority
CN
China
Prior art keywords
wind
air channel
channel
burner
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2009203126468U
Other languages
Chinese (zh)
Inventor
夏宇
代婕
孙登科
陈灿
谢佳
张山鹰
孟庆松
Original Assignee
Dongfang Boiler Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongfang Boiler Group Co Ltd filed Critical Dongfang Boiler Group Co Ltd
Priority to CN2009203126468U priority Critical patent/CN201517769U/en
Application granted granted Critical
Publication of CN201517769U publication Critical patent/CN201517769U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

The utility model discloses a swirl burner, which comprises a central air channel. A primary air channel, a secondary air I channel and a secondary air II channel are arranged on the periphery of the central air channel in turn, a coal powder concentrator is arranged in the primary air channel, and a sleeve barrel of the coal powder concentrator is sleeved outside the central air channel. The swirl burner is characterized in that the coal powder concentrator comprises first-grade concentration and second-grade concentration, wherein the first-grade concentration comprises a radial coal powder separating structure formed by each grade of circular ring in the primary air channel, the secondary concentration comprises a straight vane mounted on an axial sleeve barrel, the straight vane is peripherally distributed and forms dip angle of 15-45 degrees with the axial direction of the sleeve barrel, a flame stabilizing toothed ring is mounted between the central air channel and the tail portion of the primary air channel, and a primary air expanding cone and a secondary air expanding cone are respectively mounted at the bottom portions of the primary air channel and the secondary air I channel. The swirl burner adopts a dense-weak burner with an inertia separation (the primary concentration) and a centrifugal separation (the swirl vanes), and can effectively suppressing generation of NOX.

Description

Turbulent burner
Technical field
The utility model relates to the coal dust firing field, and especially the liquid towards slag-tap furnace is a kind of NO XThe turbulent burner that the discharge capacity scope is lower.
Background technology
Coal dust firing is NO XThe main source of discharging, though in recent years to the formation of coal in combustion process by a lot of researchs, by burning optimization control NO XGeneration, study seldom, and according to investigations, China coal-fired power station boiler slag tap coal-powder boiler NO XThe discharging scope be 850~1150mg/m 3, substantially exceeded the atmosphere pollution NO of thermal power plant XEmission standard.
In order to reduce NO XDischarge capacity, the technical staff has carried out a large amount of research, mainly contains following devices in the prior art and is used to make coal powder light-dark to separate, and reduces NO XDischarge capacity.
At Chinese utility model patent specification, a kind of controllable gradation separating spiral-flow powdered coal burning method and device have been disclosed among the notification number CN1079524C, by being provided with annular ram at a wind airduct inwall, in a wind airduct, be provided with cylindrical partition, a wind airduct is divided into internal high-density wind airduct and external low-density wind airduct, and the place is provided with the eddy flow impeller at the external low-density wind wind tube outlet.The method that this device utilizes inertial centrifugal to separate concentrates breeze airflow, dense outer light CONCENTRATION DISTRIBUTION in forming.
At Chinese utility model patent, a kind of turbulent burner of coal fines circumferential direction concentrating sectorization stopping whorl is disclosed among the publication number 101280921A, comprise center wind duct, the periphery of center wind duct set gradually from inside to outside once wind passage, interior secondary air channel and outside secondary air channel, in a wind passage, be provided with circumferential enrichment facility, and be furnished with wedge type backflow combustion stabilizing body in the whirlpool at the afterbody of circumferential enrichment facility.Reflux behind the stabilizer in the whirlpool through circumferentially concentrating stream device and wedge type when once distinguished and admirable, can form the deep or light zone of tangible coal fines circumferential direction and ignition zone is surely fired in the strong whirlpool of staying at burner outlet, and create the burning condition of high temperature eddy current flue gas and oxygen deprivation richness fuel.Has extremely strong combustion stability energy.This device is on the pulverized coal concentrator circumference fin to be set, and makes the coal dust rotation produce Gravity Separation.
Above-mentioned coal dust disconnecting gear or employing Gravity Separation or employing centrifugation are for reducing NO XDischarge capacity has played certain effect, but still can not satisfy NO XEmission standard.
The utility model content
The purpose of this utility model provides a kind ofly revolves a little less than breeze airflow is had, and makes breeze airflow further deepen the turbulent burner of deep or light separation under centrifugal action.
A kind of turbulent burner, comprise center wind duct, the wind passage once successively in the center wind duct periphery, secondary wind I air channel, secondary wind II air channel, in a wind passage, be provided with pulverized coal concentrator, the jacket casing of pulverized coal concentrator is outside center wind duct, it is characterized in that: described pulverized coal concentrator comprises that one-level concentrates and secondary concentrates, one-level concentrates and to be included in the radially coal dust isolating construction that is formed by annulus at different levels in air channel, secondary concentrates and is included in the prismatic blade of installing on the axial sleeve, prismatic blade is along circumferentially distributing, with quill to the inclination angle be 15 °~45 °; Between center wind duct and a wind passage afterbody, steady flame ring gear is installed; Be separately installed with wind reamer and secondary wind reamer in wind passage and bottom, secondary wind I air channel.
Supplementary technology scheme of the present utility model is as follows:
Preferably, X:15 °~25 ° of wind reamer angles, Y:20 °~30 ° of secondary wind reamers have been avoided the overlap of burner and the burning that intersects.
Preferably, the excess air coefficient of burner region is 0.8~0.9.
Preferably, primary air ratio is η 1=20%~30%.
Preferably, after-flame wind rate η=20%~30%.
The beneficial effects of the utility model are as follows: the shade burner that has adopted inertial separation (one-level concentrates)+centrifugation (swirl vane), the bias pulverized coal air-flow burns away from the stoichiometric ratio of fuel separately, the thick coal culm air-flow is a fuel-rich combustion, because combustion stability improves, the fugitive constituent speed of separating out is accelerated, cause fugitive constituent to separate out regional anoxic, thereby reach low NO XThe purpose of discharging.And the thin powdered coal air-flow is a fuel-lean combustion, and the combustion zone temperature levels is low, has also suppressed NO XGeneration; Adopt suitable burnt wind rate, formed the combustion atmosphere of hypoxemia amount like this at primary combustion zone, suppressed NO XGeneration, the later stage send into the required part air of after-flame in burning.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the structural representation of turbulent burner specific embodiment of the present utility model.
Fig. 2 is the schematic diagram of pulverized coal concentrator in the turbulent burner shown in Figure 1.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Specific embodiment of the utility model, as shown in Figure 1, a kind of low NOX vortex burner that is used for slag tapping boiler combusting coal fines station boiler, comprise center wind duct 1, the wind passage 2 once successively in center wind duct 1 periphery, secondary wind I air channel 8, secondary wind II air channel 7, in a wind passage 2, be provided with pulverized coal concentrator 3, the jacket casing of pulverized coal concentrator 3 is outside center wind duct, wherein pulverized coal concentrator has adopted inertial separation (one-level concentrate)+centrifugation (secondary has concentrated, swirl vane), its structure as shown in Figure 2, promptly by the prismatic blade of installing on radially coal dust isolating construction that forms by annulus at different levels in the air channel 2 and the axial sleeve, prismatic blade is along circumferentially distributing, with quill to the inclination angle be 15 °~45 °.Above-mentioned setting can further increase rich-lean ratio and change the size of recirculating zone, has increased the rich-lean ratio of primary wind and powder, makes it form deep or light deviation burning at the spout place, thereby reaches low NO XThe purpose of discharging; And the pulverized coal concentrator blade adopts prismatic blade shape, makes the coal dust deposition to avoid forming the recirculating zone behind blade.Described vortex burner also is equipped with steady flame ring gear 6 between center wind duct and a wind passage afterbody; Be separately installed with wind reamer 5 and secondary wind reamer 4 in wind passage and bottom, secondary wind I air channel.
Burner region at above-mentioned vortex burner adopts low excess air coefficient, be generally 0.8~0.9, can make fuel imperfect combustion under anoxic conditions, for example excess air coefficient α=0.85, fly-ash reburning wind is as cooling air, and burner hearth is sent in classification; In order to reach better effect, can also adopt degree of depth air stage feeding on the burner hearth air distribution: increased the OFA system that two row's tertiary airs are set up, secondary wind II eddy flow baffle plate and governor motion thereof and secondary wind II enlarging should be hanged down NO XThe combustion air of vortex burner is divided into three parts: i.e. wind, secondary wind (secondary wind I+ secondary wind II+ center wind) and a tertiary air (tertiary air I+ tertiary air II), realized air stage feeding, make the breeze airflow fractional combustion, and adopted suitable burnt wind rate, form the combustion atmosphere of hypoxemia amount like this at primary combustion zone, suppress NO XGeneration; Should low NO XVortex burner fire box temperature height also is easy to keep flameholding even use the low volatile coal; The adaptive capacity that coal is changed is stronger; The retention efficiency height can hang down the slag position or not have the operation of slag position; Combustion air adopts the wind pipe type air-supply, has guaranteed balanced ventilation; The center wind of burner, secondary wind I and the equal automatic and adjustable of secondary wind II air quantity.Secondary wind II axially enters, its air quantity and swirl strength automatic and adjustable; Adopted less primary and secondary air reamer angle: X:15 °~25 ° of wind reamer angles, secondary wind reamer has been avoided the overlaps of burner and the burning that intersects for Y:20 °~30 °.
Being used for turbulent burner that certain type 300MW uses the station boiler of strong baking coal with one is that example illustrates that its structure and parameter selects, on the stable basis of improving burning, in order to reduce NO XDischarge capacity, during the design of this combustion apparatus parameter choose with structural configuration on adopted following measure:
1) measure of being taked aspect choosing in parameter
Burner region has been chosen low excess air coefficient: α=0.85, makes fuel imperfect combustion under anoxic conditions;
At the ature of coal feature, adopted lower primary air ratio, η 1=25%;
Rational after-flame wind rate η=21.74%.
2) measure of on combustion apparatus structure and air supply mode, being taked
Adopt turbulent burner structure of the present utility model, deep or light deviation burning: the shade burner that has adopted inertial separation (one-level concentrates)+centrifugation (swirl vane).Away from the stoichiometric ratio burning of fuel, the thick coal culm air-flow is a fuel-rich combustion to the bias pulverized coal air-flow separately, because combustion stability improves, the fugitive constituent speed of separating out is accelerated, and causes fugitive constituent to separate out regional anoxic, thereby reaches low NO XThe purpose of discharging.And the thin powdered coal air-flow is a fuel-lean combustion, and the combustion zone temperature levels is low, has also suppressed NO XGeneration;
Two accent wind turbulent burners adopt classification to supply with burning and use wind, and be provided with swirl vane in secondary air channel, and the air-flow of secondary wind I and secondary wind II forms independently eddy flow, supports that volatile matter fully burns;
On the burner hearth air distribution, adopt degree of depth air stage feeding: increased the OFA system that two row's tertiary airs are set up, and adopted suitable burnt wind rate, form the combustion atmosphere of hypoxemia amount like this at primary combustion zone, suppress the generation of NOX, send into the required part air of after-flame in the burning later stage.
Adopted less primary and secondary air reamer angle: X:15 ° of wind reamer angle, Y:20 ° of secondary wind reamer avoided the overlap of burner and the burning that intersects.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims (5)

1. turbulent burner, comprise center wind duct, the wind passage once successively in the center wind duct periphery, secondary wind I air channel, secondary wind II air channel, in a wind passage, be provided with pulverized coal concentrator, the jacket casing of pulverized coal concentrator is outside center wind duct, it is characterized in that: described pulverized coal concentrator comprises that one-level concentrates and secondary concentrates, one-level concentrates and to be included in the radially coal dust isolating construction that is formed by annulus at different levels in air channel, secondary concentrates and is included in the prismatic blade of installing on the axial sleeve, prismatic blade is along circumferentially distributing, with quill to the inclination angle be 15 °~45 °; Between center wind duct and a wind passage afterbody, steady flame ring gear is installed; Be separately installed with wind reamer and secondary wind reamer in wind passage and bottom, secondary wind I air channel.
2. turbulent burner according to claim 1 is characterized in that: X:15 °~25 ° of wind reamer angles, Y:20 °~30 ° of secondary wind reamers have been avoided the overlap of burner and the burning that intersects.
3. turbulent burner according to claim 2 is characterized in that: the excess air coefficient of burner region is 0.8~0.9.
4. turbulent burner according to claim 3 is characterized in that: primary air ratio is η 1=20%~30%.
5. turbulent burner according to claim 4 is characterized in that: after-flame wind rate η=20%~30%.
CN2009203126468U 2009-10-16 2009-10-16 Swirl burner Expired - Lifetime CN201517769U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009203126468U CN201517769U (en) 2009-10-16 2009-10-16 Swirl burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009203126468U CN201517769U (en) 2009-10-16 2009-10-16 Swirl burner

Publications (1)

Publication Number Publication Date
CN201517769U true CN201517769U (en) 2010-06-30

Family

ID=42498492

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009203126468U Expired - Lifetime CN201517769U (en) 2009-10-16 2009-10-16 Swirl burner

Country Status (1)

Country Link
CN (1) CN201517769U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162289A (en) * 2013-03-11 2013-06-19 扬州晨光特种设备有限公司 Rotational flow stopping block type pulverized coal concentrator
CN103438449A (en) * 2013-07-30 2013-12-11 太原理工大学 Cyclone pulverized coal burner with secondary concentration
CN104214773A (en) * 2014-07-18 2014-12-17 东方电气集团东方锅炉股份有限公司 Ultra-low NOx rotational flow powdered coal burner
CN107525067A (en) * 2017-09-21 2017-12-29 哈尔滨工业大学 A kind of center feeding rotational flow coal dust burner for preventing water-cooling wall slagging

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162289A (en) * 2013-03-11 2013-06-19 扬州晨光特种设备有限公司 Rotational flow stopping block type pulverized coal concentrator
CN103438449A (en) * 2013-07-30 2013-12-11 太原理工大学 Cyclone pulverized coal burner with secondary concentration
CN104214773A (en) * 2014-07-18 2014-12-17 东方电气集团东方锅炉股份有限公司 Ultra-low NOx rotational flow powdered coal burner
CN104214773B (en) * 2014-07-18 2017-09-05 东方电气集团东方锅炉股份有限公司 Ultralow nox swirling fine coal burner
CN107525067A (en) * 2017-09-21 2017-12-29 哈尔滨工业大学 A kind of center feeding rotational flow coal dust burner for preventing water-cooling wall slagging

Similar Documents

Publication Publication Date Title
CN1279313C (en) Circularly shirl coal powder burn device with various concentration coal powder pipe
CN201680364U (en) Efficient low NOx pulverized coal burner for small and medium-sized industrial boilers
CN201517769U (en) Swirl burner
CN201496957U (en) Cyclone pulverized coal burner
CN201662062U (en) Cyclone pulverized coal burner
CN102393015A (en) Dense-phase spiral-flow pulverized-coal burner
CN101832551A (en) Adjustable center weak swirl pulverized coal burner
CN101865462B (en) Weak-cyclone primary air multi-stage separation cyclone burner
CN202002096U (en) Water-coal-slurry low-nitrogen swirl burner
CN107477572A (en) Using the center feeding rotational flow coal dust burner of separation Secondary Air bilayer jet
CN2699136Y (en) Vortex pulverized coal burner
CN105465781A (en) Low-nitrogen-oxide-emission swirl pulverized coal burner with surrounding air
CN102537951B (en) Central diffusion type tiny-oil ignition combustor
CN101988698A (en) Cyclone pulverized coal burner
CN205351318U (en) Air classification hangs down NOx gas burner with adjustable whirl intensity
CN107559818A (en) Using precombustion chamber and the center feeding rotational flow coal dust burner of double-deck jet separation Secondary Air
CN202040815U (en) Natural gas combustion-supporting industrial pulverized coal cyclone combustor
CN205807402U (en) A kind of low-nitrogen oxide discharging vortex burner with surrounding air
CN104100971A (en) Cyclone burner with primary air concentration separation function
CN105782967A (en) Burning method of concentrated-thin type dual channel swirl burner of power station boiler
CN202647746U (en) Real-time adjustable novel swirl burner
CN203731402U (en) A dual-air-regulating pulverized coal burner for an industrial pulverized coal boiler
CN201496958U (en) W-flame cyclone separation low-oil ignition burner
CN204421000U (en) A kind of turbulent burner
CN103836619B (en) A kind of primary air velocity scalable pulverized coal bias combustion device

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee

Owner name: DEC DONGFANG BOILER (GROUP) CO., LTD.

Free format text: FORMER NAME: DONGFANG BOILER (GROUP) CO., LTD.

CP01 Change in the name or title of a patent holder

Address after: Zigong City, Sichuan Province, 643001 five-star street Huang Jue Ping Road No. 150

Patentee after: DEC Dongfang Boiler (Group) Co., Ltd.

Address before: Zigong City, Sichuan Province, 643001 five-star street Huang Jue Ping Road No. 150

Patentee before: Dongfang Boiler (Group) Co., Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20100630