CN109631019A - Industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation - Google Patents

Industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation Download PDF

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Publication number
CN109631019A
CN109631019A CN201811548783.1A CN201811548783A CN109631019A CN 109631019 A CN109631019 A CN 109631019A CN 201811548783 A CN201811548783 A CN 201811548783A CN 109631019 A CN109631019 A CN 109631019A
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China
Prior art keywords
air
burner
pipeline
separation
flue gas
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CN201811548783.1A
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Chinese (zh)
Inventor
陈智超
严蓉
袁振华
曾令艳
李争起
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Harbin Institute of Technology
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Harbin Institute of Technology
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Priority to CN201811548783.1A priority Critical patent/CN109631019A/en
Publication of CN109631019A publication Critical patent/CN109631019A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08Disposition of burners
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00Combustion apparatus characterised by arrangements for air supply
    • F23C7/002Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/003Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D1/00Burners for combustion of pulverulent fuel
    • F23D1/02Vortex burners, e.g. for cyclone-type combustion apparatus

Abstract

Industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation, the present invention relates to Boiler Swirling Burners, it is high that present invention aim to address current industrial coal powder boiler NOx discharges, the easy slagging of burner hearth, the high problem of unburned combustible in fly ash, it includes vortex burner, flue gas recycled pipeline, recirculation blower, separate secondary air pipeline valve, first burner secondary air pipeline, second burner secondary air pipeline, separate secondary air pipeline, two burner secondary air pipeline valves, multiple separation overfire air port pipes and multiple separation Secondary Air cyclones, a burner secondary air pipeline valve is separately installed on first burner secondary air pipeline and the second burner secondary air pipeline, separation Secondary Air is installed on separation secondary air pipeline Air pipeline valve, vortex burner are mounted on the center of the boiler furnace front wall of horizontal boiler, and the present invention is used for boiler combustion field.

Description

Industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation
Technical field
The present invention relates to combined denitration burners in boiler primary zone spray reducing agent furnace, and in particular to industrial coal powder boiler is adopted With the wide regulating ratio vortex burner of flue gas recirculation, belong to field of boilers.
Background technique
Coal-burned industrial boiler is that main in addition to station boiler of China is equipped with coal, and sum is close to 600,000, year consumption Nearly 6.4 hundred million tons of coal.Coal-burned industrial boiler generates about 2,000,000 tons of NOx every year, and discharge amount is only second to coal-fired power station boiler, has become For one of China most important NOx pollutant emission source.
Chain furnace of traditional coal-burned industrial boiler in a manner of using grate firing is in the majority.Compared to chain furnace, pulverized-coal fired boiler is adopted It is room combustion combustion system, pulverized coal particle sprays into burner hearth in company with air and carries out suspension combustion, boiler thermal efficiency with higher. But it is limited by size of burner hearth and combustion system, the generally existing NOx discharge of existing small and medium-sized industrial coal powder boilers is high, burner hearth Easy slagging, the problems such as unburned combustible in fly ash is high.Increasingly serious with Environmental Protection in China problem, the Chinese government is for industrial combustion The pollutant discharge amount of coal burning boiler requires also increasingly strictly, if not taking effective solution to industrial coal powder boiler Problems Existing Measure, it may be difficult to meet increasingly harsh environmental protection standard.Meanwhile Industrial Boiler is in particular for heating boiler, daytime, load was low, at night Load is high, and intraday load fluctuation is big, and underload is the 1/7 of Design cooling load, even lower, most of industrial coal powder boiler without Method is met the requirements.So developing with imperative compared with the industrial coal powder boiler of load wide regulating ratio.
For the research of industrial coal powder boiler, the developed country based on Germany forms in past more than 30 years Dr.Schoppe, HM, Pillard and Saacke etc. different technology schools.The wherein CONOx-UCC burner of Saacke exploitation Using air zoning multistage combustion technology, by being respectively arranged one layer of swirl secondary air direct current annular First air is inside and outside, pre- Combustion room surrounding is circular layout multiple direct currents wind snout three times, realizes the burning of air radial grading.
China also proposed some combustion technologies for industrial furnace, such as patent of invention " using separation Secondary Air bilayer The center feeding rotational flow coal dust burner of jet stream " Chinese Patent Application No. is CN201710861235.3, application publication number is CN107477572A calls " file one " in the following text equipped with primary air piping and inside and outside secondary air channel and tertiary-air pipe, is not mixed into and follows again Ring flue gas;A kind of patent of invention " vortex burner for using flue gas recirculation for Industrial Stoves " China Patent No. for ZL201010213627.7, data of publication of application are November 3, application publication number CN101876433A in 2010, call " file in the following text Two " are equipped with outside annular between First air channel and inner second air channel and between inner second air channel and outer second air channel Side flue gas recirculation channel, flue gas recycled is sent directly into flue gas recirculation channel.These above-mentioned technologies, although certain NOx concentration is reduced in degree, but still generally existing NOx discharge height, the easy slagging of burner hearth, unburned combustible in fly ash height etc. are asked Topic.
Summary of the invention
Present invention aim to address current industrial coal powder boiler NOx discharge height, the easy slagging of burner hearth, fly ash combustible materials to contain High problem is measured, and then the wide regulating ratio vortex burner that industrial coal powder boiler uses flue gas recirculation is provided.
The present invention in order to solve the above problem and the technical solution adopted is that:
It includes vortex burner, flue gas recycled pipeline, recirculation blower, separation secondary air pipeline valve Door, the first burner secondary air pipeline, the second burner secondary air pipeline, separation secondary air pipeline, two Burner secondary air pipeline valve, multiple separation overfire air port pipes and multiple separation Secondary Air cyclones;First burning A burner secondary air pipe is separately installed on device secondary air pipeline and the second burner secondary air pipeline Road valve, separates and is equipped with separation secondary air pipeline valve on secondary air pipeline, and vortex burner is mounted on The center of the boiler furnace front wall of horizontal boiler, the first burner secondary air pipeline, the second burner Secondary Air are empty Feed channel and separation secondary air pipeline be connected to respectively with vortex burner, one end of flue gas recycled pipeline with separate The connection of secondary air pipe side wall, the other end of flue gas recycled pipeline are connected to recirculation blower, separate secondary air Multiple separation overfire air port pipes are installed on pipeline, one end of each separation overfire air port pipe with separate secondary air pipe The side wall in road is connected to, and the other end of each separation overfire air port pipe is connected to the boiler furnace front wall of horizontal boiler respectively, and It is respectively corresponded in each separation overfire air port pipe and a separation Secondary Air cyclone is installed.
Beneficial effects of the present invention:
1 present invention is conducive to more greatly reduce NOx generation amount
1. apparatus of the present invention arrange multiple separation overfire air ports on the outside of burner, and by 35%~55% air capacity It is sent by separation overfire air port, the combustion air ratio being sent into from burner nozzle only accounts for 45%~65%, significantly strengthens The reproducibility in burner centre region, fuel is in reducing atmosphere for a long time to burn, and the NOx in entire combustion process is generated Amount can be effectively reduced.
2. " file one " described burner does not use flue gas recirculating technique.It compares " file one ", divides in apparatus of the present invention From flue gas recycled is introduced in secondary air duct, flue gas recycled mixes in separating secondary air channel with air, when flue gas follows again When ring rate is set as 20%, flue gas recycled mix with air after gas oxygen concentration 16% or so, before mixing Air oxygen concentration decline about 5%, enhances Deoxidation Atmosphere in Furnace, is effectively reduced the production quantity of NOx;Meanwhile recycling cigarette Gas is mixed into the oxygen content significantly reduced in combustion air, reduces flame localized hyperthermia, can effectively inhibit heating power The generation of type NOx;What flue gas recycled extracted is the low-temperature flue gas of boiler tail, and low-temperature flue gas is mixed into so that average in burner hearth Temperature reduces, to further reduced the production quantity of NOx.
3. " file two " described burner is between First air channel and inner second air channel and inner second air channel and outer Annular outboard flue gas recirculation channel is set between secondary air channel, flue gas recycled and air are layered entrance at burner nozzle In burner hearth, air layer air-flow oxygen concentration is high compared with flue gas recycled layer air-flow concentration, is just uniformly mixed after spraying into burner hearth a distance, When coal dust enters oxygen content high air layer, NOx discharge increases.It compares " file two ", apparatus of the present invention will only recycle cigarette Gas is introduced into separation Secondary Air, is mixed flue gas recycled in separating secondary air channel with air, is not present at burner nozzle Stratification of hot gas enters, and has not only saved the mixed process of flue gas and air in furnace, but also make burner outlet region radial direction oxygen concentration It is evenly distributed, ensure that coal dust stablizes burning, it is suppressed that NOx discharge.
4. " file two " described burner concentrates primary wind and powder gas by the way that one group of conical ring is arranged in First air channel Coal dust in stream, but breeze airflow can not be totally absorbed in burner centre and spray into burner hearth by conical ring, can be only formed " intermediate It is dense, both sides are light " combustion type, and dense, the thin powdered coal stream after being concentrated will appear again after through final stage conical ring and mix again It closes, the beneficial effect that coal powder light-dark fractional combustion reduces NOx is not played completely, in addition, the breeze airflow in channel is also The conical surface can be formed to conical ring to wash away, occur in use because conical ring is worn and replaced the feelings of burner by coal dust Condition increases operating cost, reduces the economic benefit of boiler.It compares " file two ", apparatus of the present invention are defeated using primary air piping High concentration pulverized coal air-flow is sent, coal dust is totally absorbed in burner centre and sprays into burner hearth, and burner outlet central backflow is increased The coal powder density in area makes coal dust concentrate in Central backflow area reducing atmosphere burning, extends coal dust in reducing atmosphere Residence time, further reduced the production quantity of NOx, and coal is reduced using primary air piping conveying high concentration pulverized coal air-flow The abrasion of powder air-flow extends the service life of burner.
5. the CONOx-UCC burner of Saacke production is sequentially arranged eddy flow inner second air, direct current annular one from inside to outside Secondary wind, eddy flow outer second air.Arrange that eddy flow inner second air, First air can be mixed with inner second air in outlet in First air, Reduce center coal powder density.The burner is compared, eddy flow inner second air is arranged in outside primary air piping by apparatus of the present invention, and one Secondary air hose conveys high concentration pulverized coal air-flow, and coal dust is totally absorbed in burner centre and sprays into burner hearth, increases burner outlet The coal powder density of Central backflow area makes coal dust concentrate in Central backflow area reducing atmosphere burning, and extends coal dust and is restoring Residence time in property atmosphere, reduce the production quantity of burner centre region NOx.
6. Saacke production CONOx-UCC burner use direct current tertiary air, in underload, tertiary air wind speed compared with It is low, it is unfavorable for fractional combustion.Compare the burner, apparatus of the present invention separation overfire air port can radially wobble along burner and The cyclone of arrangement adjustable blade burner in overfire air port is separated, swingable separation overfire air port guarantees separation Secondary Air With enough penetrability, the load adaptability of burner is more preferable.Meanwhile it separating the cyclone arranged in overfire air port and makes point Enter in furnace from the micro- precession of Secondary Air, the contact area of separation Secondary Air and inner flue gas of the stove is bigger, disturbance is stronger, and mixed effect is more Good, oxygen concentration is more uniform in flue gas after mixing, can be to avoid a large amount of generations of local NO x.
2 present invention are conducive to avoid ash erosion and high temperature corrosion
1. comparing " file two ", flue gas recycled channel is not separately provided by the present invention, avoids flue gas recycled and air Burner hearth is sent into layering, and in separating secondary air channel by evenly mixing, burner outlet region is radial for flue gas recycled and air Oxygen concentration is evenly distributed, and ensure that coal dust stablizes burning, avoid because oxygen concentration be unevenly distributed, partial region ignition temperature it is high Caused by slagging.
2. apparatus of the present invention separate overfire air port can be along burning compared to the CONOx-UCC burner of Saacke production The radial water-cooling wall direction around of device is swung, and the cyclone of adjustable blade burner is arranged in separation overfire air port.It can put Dynamic spout increases separation Secondary Air in radial stream range, and the separation Secondary Air of rotation is formed about strong in water-cooling wall Strong disturbance separates high temperature, the flue gas of high lime-ash concentration and inboard wall of burner hearth, reduces the lime-ash and inboard wall of burner hearth of high temperature Contact mitigates ash erosion.The separation Secondary Air of rotation can purge inboard wall of burner hearth simultaneously, play the role of deashing, reduce furnace Interior dust stratification avoids because slagging caused by fouling of heating surface is excessive, and the purging on radial extension, can effectively drop Temperature near low water-cooling wall, prevents water wall high temperature corrosion.Importantly, the cyclone leaf arranged in separation overfire air port Piece adjustable angle, i.e. vane cyclone intensity is adjustable, can efficiently control wall surface atmosphere according to coal quality, load etc., make burner Surrounding furnace wall is in oxidizing atmosphere, and ash fusion point is higher under oxidizing atmosphere, so as to avoid because reducing atmosphere makes Slagging caused by ash fusion point decline.
3 present invention are conducive to the after-flame of coal dust
1. " file two " described burner is between First air channel and inner second air channel and inner second air channel and outer Annular outboard flue gas recirculation channel is set between secondary air channel, flue gas recycled is mixed with inside and outside Secondary Air, influences coal dust Initial combustion.Compare " file two ", apparatus of the present invention only by flue gas recycled is introduced into separation Secondary Air in, make flue gas recycled and Air mixes in separation secondary air channel, separates overfire air port principle burner centre, avoids flue gas and inside and outside Secondary Air Mixing, ensure that coal dust stablize burning, be conducive to coal dust after-flame.
2. " file two " described burner concentrates primary wind and powder gas by the way that one group of conical ring is arranged in First air channel Coal dust in stream, coal dust can not be totally absorbed in burner centre and be sent into burner hearth by this.It compares " file two ", the present invention uses Coal dust is totally absorbed in burner centre and is sent into burner hearth by primary air piping, so that the coal dust sprayed into furnace concentrates on high temperature center and returns Area is flowed, coal dust is not only extended and is conducive to the after-flame of coal dust in the residence time of high temperature recirculation zone, while coal powder density is high advantageous In kindling, ignition heat is reduced, and ignition time shifts to an earlier date, and is also able to extend coal dust in the residence time of high temperature recirculation zone.
3. the CONOx-UCC burner of Saacke production feeds high concentration pulverized coal air-flow annular in furnace, in rotation Breeze airflow is expanded to outer second air region rapidly under the guiding role of Secondary Air, is mixed with the outer second air of rotation, Secondary Air Wind-warm syndrome is low to cause coal powder ignition to be postponed, and residing time in furnace shortens, and is unfavorable for coal dust in low temperature Secondary Air for a long time After-flame.Gram burner is pricked in comparison, and primary air piping is arranged in burner centre by apparatus of the present invention, and primary air piping is complete by coal dust It concentrates on burner centre and is sent into burner hearth, so that the coal dust sprayed into furnace all concentrates on high temperature center recirculating zone, extend coal Powder is conducive to the after-flame of coal dust in the residence time of high temperature recirculation zone.
4 coal adaptabilities are wide
The present invention is separately installed with valve on secondary air channels at different levels and flue gas recycled pipeline, and valve is adjusted at different levels two The aperture of secondary air hose and flue gas recycled pipeline is sent into the air of secondary air channels at different levels and following in feeding furnace again with reasonable distribution The ratio of ring flue gas can choose suitable air for different coals quality and boiler load and exhaust gas volumn is sent into furnace, effectively Ground enhances the coal adaptability and load regulation range of boiler.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the industrial coal powder boiler using the wide regulating ratio vortex burner of flue gas recirculation,
Fig. 2 is the boiler that vortex burner 1 and multiple separation overfire air port pipes 2 are mounted on horizontal boiler in Fig. 1 A direction view on burner hearth front wall 8.
Specific embodiment
Specific embodiment 1: illustrating present embodiment in conjunction with Fig. 1-Fig. 2, industrial coal powder boiler described in present embodiment is adopted With the wide regulating ratio vortex burner of flue gas recirculation, it includes vortex burner 1, flue gas recycled pipeline 6, again Circulating fan 7, separation secondary air pipeline valve 4-1, the first burner secondary air pipeline 9, the second burner are secondary Wind air pipeline 10, separation 11, two burner secondary air pipeline valves 4 of secondary air pipeline, multiple separation are secondary Wind snout pipe 2 and multiple separation Secondary Air cyclones 3;First burner secondary air pipeline 9 and the second burner Secondary Air It is separately installed with a burner secondary air pipeline valve 4 on air pipeline 10, separates and pacifies on secondary air pipeline 11 Equipped with separation secondary air pipeline valve 4-1, vortex burner 1 is mounted on the boiler furnace front wall 8 of horizontal boiler Center, the first burner secondary air pipeline 9, the second burner secondary air pipeline 10 and separation secondary air Pipeline 11 is connected to vortex burner 1 respectively, one end of flue gas recycled pipeline 6 with separate 11 side of secondary air pipeline Wall connection, the other end of flue gas recycled pipeline 6 are connected to recirculation blower 7, are separated and are equipped on secondary air pipeline 11 Multiple separation overfire air port pipes 2, one end of each separation overfire air port pipe 2 and the side wall that separates secondary air pipeline 11 The other end of connection, each separation overfire air port pipe 2 is connected to the boiler furnace front wall 8 of horizontal boiler respectively, and each point A separation Secondary Air cyclone 3 is installed from respectively corresponding in overfire air port pipe 2.
Specific embodiment 2: embodiment is described with reference to Fig. 1, industrial coal powder boiler described in present embodiment uses cigarette The wide regulating ratio vortex burner of gas recycling, vortex burner 1 include primary air piping 1-1, eddy flow inner second air Pipe 1-2, eddy flow outer second air pipe 1-3, interior swirl flow blade 1-4 and outer swirl flow blade 1-5, primary air piping 1-1, eddy flow Sequentially coaxially suit is arranged inner second air pipe 1-2 and eddy flow outer second air pipe 1-3 from inside to outside, in primary air piping 1-1 and eddy flow Be equipped between secondary air channel 1-2 interior swirl flow blade 1-4, eddy flow inner second air pipe 1-2 and eddy flow outer second air pipe 1-3 it Between outer swirl flow blade 1-5 is installed, the length value and eddy flow of the length value of primary air piping 1-1, eddy flow inner second air pipe 1-2 The length value of outer second air pipe 1-3 is gradually reduced, and interior swirl flow blade 1-4 and outer swirl flow blade 1-5 can both be used Axial swirl blades can also use tangential swirl blade.Interior swirl flow blade 1-4, outer swirl flow blade 1-5 and separation Blade angle is adjustable in Secondary Air cyclone 3, and other methods are same as the specific embodiment one.
Specific embodiment 3: embodiment is described with reference to Fig. 1, industrial coal powder boiler described in present embodiment uses cigarette The wide regulating ratio vortex burner of gas recycling, primary air piping 1-1, eddy flow inner second air pipe 1-2 and eddy flow outer second air A secondary air pipeline is separately installed on pipe 1-3, the secondary air pipeline on eddy flow outer second air pipe 1-3 Multiple separation overfire air port pipes 2 are uniformly tiltedly installed on side wall, and multiple separation overfire air port pipes 2 are by secondary air Pipeline to horizontal boiler boiler furnace front wall 8 be gradually expanded form scattering device, and it is each separation overfire air port pipe 2 center line It is r with the angulation where the center line of primary air piping 1-1, the numberical range of r is 30 ° -60 °, swingable separation two Secondary wind cyclone 3 increases the wind of separation overfire air port pipe 2 in radial stream range, and the separation Secondary Air of rotation is in water cooling High temperature, the flue gas of high lime-ash concentration and inboard wall of burner hearth are separated, reduce the ash of high temperature by the strong disturbance that wall is formed about Contact of the slag with inboard wall of burner hearth mitigates ash erosion.The separation Secondary Air of rotation can purge inboard wall of burner hearth simultaneously, play deashing Effect, reduce dust deposit in furnace, avoid because of slagging caused by fouling of heating surface is excessive, and blowing on radial extension It sweeps, can be effectively reduced water-cooling wall temperature nearby, prevent water wall high temperature corrosion.Other methods and specific embodiment two-phase Together.
Specific embodiment 4: embodiment is described with reference to Fig. 1, industrial coal powder boiler described in present embodiment uses cigarette The wide regulating ratio vortex burner of gas recycling, it further includes flue gas recycled pipeline valve 5, flue gas recycled pipeline valve Door 5 is mounted on flue gas recycled pipeline 6.Other methods are same as the specific embodiment one.
Specific embodiment 5: embodiment is described with reference to Fig. 1, industrial coal powder boiler described in present embodiment uses cigarette The wide regulating ratio vortex burner of gas recycling, the last air hose 1-1 of vortex burner 1, eddy flow inner second air pipe 1-2 and eddy flow outer second air pipe 1-3 with the end face of 8 connecting pin of boiler furnace front wall of horizontal boiler is concordant is arranged.Other sides Method is identical with embodiment two.
Working principle
1 starting trouble air-introduced machine and air blower are pre-purged, and adjust blower to desired combustion chamber draft.Starting ignition dress Igniting is set, after combustion gas is ignited, starts pulverized coal conveying device, coal dust is under the transport of First air through primary air piping from burner The heart sprays, and is lighted by gas flame.
2 fresh airs that air blower blasts simultaneously form inner second air, outer second air, fresh air and reduced air power traction The flue gas recycled returned is thoroughly mixed to form separation Secondary Air in separation secondary air duct and is sent into burner.It is inner second air, outer Secondary Air and separation Secondary Air are respectively in interior Secondary Air swirl vane, outer second air swirl vane and separation Secondary Air eddy flow Rotating jet is formed under the action of device, is sent into burner hearth.
3 are ignited in coal dust with after combustion gas cofiring to stabilization, close igniter, are burnt completely by coal dust.Pass through Inner second air, outer second air and separation Secondary Air is adjusted in air pipings at different levels and flue valve, makes at different levels two Secondary wind reasonable distribution, while separation Secondary Air radial angle is adjusted, realize the low of vortex burner under different service conditions Nitrogen efficient burning.

Claims (5)

1. the wide regulating ratio vortex burner that industrial coal powder boiler uses flue gas recirculation, it is characterised in that: it includes rotation Flow coal-powder combustor (1), flue gas recycled pipeline (6), recirculation blower (7), separation secondary air pipeline valve (4-1), First burner secondary air pipeline (9), the second burner secondary air pipeline (10), separation secondary air pipeline (11), two burner secondary air pipeline valves (4), multiple separation overfire air port pipes (2) and multiple separation Secondary Airs Cyclone (3);It is installed respectively on first burner secondary air pipeline (9) and the second burner secondary air pipeline (10) There is a burner secondary air pipeline valve (4), separation Secondary Air is installed empty in separation secondary air pipeline (11) Feed channel valve (4-1), vortex burner (1) are mounted on the center of the boiler furnace front wall (8) of horizontal boiler, the One burner secondary air pipeline (9), the second burner secondary air pipeline (10) and separation secondary air pipeline (11) be connected to respectively with vortex burner (1), one end of flue gas recycled pipeline (6) with separate secondary air pipeline (11) side wall is connected to, and the other end of flue gas recycled pipeline (6) is connected to recirculation blower (7), separates secondary air pipeline (11) multiple separation overfire air port pipes (2) are installed on, one end of each separation overfire air port pipe (2) with separate Secondary Air The side wall of air pipeline (11) is connected to, the other end of each separation overfire air port pipe (2) respectively with the Boiler Furnace of horizontal boiler Thorax front wall (8) connection, and respectively corresponded in each separation overfire air port pipe (2) and a separation Secondary Air cyclone is installed (3)。
2. industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation according to claim 1, Be characterized in that: vortex burner (1) includes primary air piping (1-1), eddy flow inner second air pipe (1-2), eddy flow outer second air Manage (1-3), interior swirl flow blade (1-4) and the second swirl vane (1-5), primary air piping (1-1), eddy flow inner second air pipe Sequentially coaxially suit is arranged from inside to outside for (1-2) and eddy flow outer second air pipe (1-3), secondary in primary air piping (1-1) and eddy flow Interior swirl flow blade (1-4), eddy flow inner second air pipe (1-2) and eddy flow outer second air pipe (1- are installed between air hose (1-2) 3) the second swirl vane (1-5) is installed between.
3. industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation according to claim 2, It is characterized in that: being separately installed with one on primary air piping (1-1), eddy flow inner second air pipe (1-2) and eddy flow outer second air pipe (1-3) A secondary air pipeline is located on the side wall of the secondary air pipeline on eddy flow outer second air pipe (1-3) uniformly inclination peace Equipped with multiple separation overfire air port pipes (2), and multiple separation overfire air port pipes (2) are by secondary air pipeline to horizontal pot The boiler furnace front wall (8) of furnace be gradually expanded form scattering device, and it is each separation overfire air port pipe (2) center line and First air Angulation where managing the center line of (1-1) is r, and the numberical range of r is 30 ° -60 °.
4. industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation according to claim 1, Be characterized in that: it further includes flue gas recycled pipeline valve (5), and flue gas recycled pipeline valve (5) is mounted on flue gas recycled On pipeline (6).
5. industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation according to claim 2, It is characterized in that: vortex burner (1) last time air hose (1-1), eddy flow inner second air pipe (1-2) and eddy flow outer second air pipe (1-3) with the end face of boiler furnace front wall (8) connecting pin of horizontal boiler is concordant is arranged.
CN201811548783.1A 2018-12-18 2018-12-18 Industrial coal powder boiler uses the wide regulating ratio vortex burner of flue gas recirculation Pending CN109631019A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506425A (en) * 2011-09-28 2012-06-20 哈尔滨工业大学 Central-feeding swirling pulverized coal burner with central air pipeline
CN104180368A (en) * 2014-08-26 2014-12-03 山西蓝天环保设备有限公司 Medium-and-low temperature hot fume powder feeding type coal powder combustion device and combustion process thereof
CN107477572A (en) * 2017-09-21 2017-12-15 哈尔滨工业大学 Using the center feeding rotational flow coal dust burner of separation Secondary Air bilayer jet
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
CN107606606A (en) * 2017-09-21 2018-01-19 哈尔滨工业大学 Powder " Ω " shape industrial coal powder boiler is given at a kind of center using flue gas recirculation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506425A (en) * 2011-09-28 2012-06-20 哈尔滨工业大学 Central-feeding swirling pulverized coal burner with central air pipeline
CN104180368A (en) * 2014-08-26 2014-12-03 山西蓝天环保设备有限公司 Medium-and-low temperature hot fume powder feeding type coal powder combustion device and combustion process thereof
CN107477572A (en) * 2017-09-21 2017-12-15 哈尔滨工业大学 Using the center feeding rotational flow coal dust burner of separation Secondary Air bilayer jet
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
CN107606606A (en) * 2017-09-21 2018-01-19 哈尔滨工业大学 Powder " Ω " shape industrial coal powder boiler is given at a kind of center using flue gas recirculation

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