CN208418735U - It can be used for biomass or coal dust can be across the low-NOx combustor of Load Regulation - Google Patents
It can be used for biomass or coal dust can be across the low-NOx combustor of Load Regulation Download PDFInfo
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- CN208418735U CN208418735U CN201820843076.4U CN201820843076U CN208418735U CN 208418735 U CN208418735 U CN 208418735U CN 201820843076 U CN201820843076 U CN 201820843076U CN 208418735 U CN208418735 U CN 208418735U
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Abstract
It can be used for biomass or coal dust can be across the low NO of Load Regulation the utility model discloses a kind ofxBurner is cased with SOFA windband cylinder including the Secondary Air sleeve being connected in pre-burning room housing in precombustion chamber；Outer First air sleeve, inner second air sleeve and interior First air sleeve are successively cased in Secondary Air sleeve, central tube is cased in interior First air sleeve, center tube end is fixed with the ignition system being made of oil gun or gas gun, high-energy igniter and igniting propeller for pushing oil gun or gas gun and high-energy igniter to be moved forward and backward in central tube, and oil gun or gas gun and high-energy igniter are stretched in precombustion chamber by center pipe end.The utility model comes into operation outer second air satisfaction across Load Regulation according to the selection of actual load demand.Matched by fuel staging and sends strengthen burning device to the adaptability of Biomass/Pulverized Coal difference combustion system.The utility model is compact-sized, adaptable, coal dust firing stability is good, and NO can be effectively reducedxIt generates and discharges.
Description
Technical field
The utility model belongs to Thermal Energy and Power Engineering technical field, is related to a kind of turbulent burner, and in particular to a kind of
Can be used for Biomass/Pulverized Coal individually burn or mixed combustion can be across the low NO of Load RegulationxBurner, for strengthen burning device to life
The adaptability of substance/coal dust difference combustion system (individually burning, mixed combustion) meets across Load Regulation, improves Biomass/Pulverized Coal combustion
NO in the stability and reduction Biomass/Pulverized Coal combustion process of burningxIt generates.
Background technique
Instantly, coal is the main body consumption pattern of China's energy.It is counted according to China Statistical yearbook, 2016, China's energy
Source total quantity consumed reaches 43.6 hundred million tons of standard coals, and wherein coal accounts for the specific gravity of energy-consuming up to 62% as fossil energy.According to
" national Power Industry Statistics flash report " is announced, and 3,905,800,000,000 kilowatt hour of China's coal fired power generation amount in 2016 accounts for national total power generation
65.2%, increase by 1.3 percentage points compared with 2015 year-on-years.
Meanwhile biomass energy is exploited as a kind of renewable energy to Optimization of Energy Structure, protection environment, emission reduction
Greenhouse gases etc. have a very important role." the renewable energy Long-and Medium-term Development issued according to National Development and Reform Committee in 2007
Planning ", China's biomass resource can be exchanged into about 500,000,000 tons of standard coals of potentiality of the energy at present, and biomass resource is converted to from now on
The potentiality of the energy are up to 1,000,000,000 tons of standard coals.Biomass individually burn as fuel or biomass and coal dust mixed firinor fuel burning all may be used
To alleviate non-renewable fossil energy immense pressure in short supply.
According to the demand of actual load, boiler mainly passes through first and second air quantity of reasonable distribution, changes air quantity, coal-supplying amount, from
And change the solid circulating rate of boiler, to achieve the purpose that adjust boiler load.In normal operation, First air meets normal fluidisation
Burn institute's required airflow, and Secondary Air controls total blast volume, as Load adjustment variable, the principle of adjustment be when increasing load " first plus wind, then
Coal ", when load shedding " first subtract coal, after again checking ".Fuel quantity is reduced when boiler at low load is run, fire box temperature reduces, and can be made
At combustion instability, in some instances it may even be possible to will cause flame-out；Fire box temperature and flue-gas temperature increase when boiler heavy-duty service, fuel
Clinkering property is also more obvious, will cause superheater over temperature, water-cooling wall heat exchange amount reduce it is serious when cause Waterwall tube failure, slagging is fallen
Shi Keneng smashes water screen tube while causing combustion chamber draft fluctuation, and fire-putting-out emergency is caused when serious.
The power generation in China is mainly derived from coal fired power generation, and due to areal variation, the coal that China produces is not quite similar,
Cover the categories such as anthracite, meager coal, bituminous coal, lignite.The volatile matter content of different types of coal is different, thus in kindling and combustion characteristics
On have differences.In the design process of power station and Industrial Boiler, need to consider boiler and combustion according to the difference for using coal
The type selecting of burner.For design coal, the operating condition of burner is preferable, however, for the factor of resource and cost, in power station
In the actual motion of Industrial Boiler, the blending burning for being frequently present of coal dust even becomes the case where coal is burnt.Under such situation,
The operating condition of burner is often not satisfactory, and is easy to appear the problems such as coal dust is difficult to after-flame or Boiler Furnace slagging, and burning is caused to be imitated
Rate reduces, and fluff pulp increases, and results in waste of resources and environmental hazard.
Coal burning is nitrogen oxides (NOx) main source, NOxIt is the main reason that photochemical fog generates, while
It is the principal element to form acid rain, seriously endangers atmospheric environment and human health.Also, result of study shows NOxIt is also atmosphere
The important sources of PM2.5 particle are to cause one of main arch-criminal of national haze weather.In order to reduce NOxPollution to environment,
The discharge standard being increasingly stringenter is formulated in China.National environmental protection portion in 2011 issued newest revision " thermal power plant is big
Gas pollutant emission standard (GB13223-2011) ", it is specified that coal fired power plant NOxConcentration of emission limit is 100mgm-3, at
For most stringent of thermal power plant atmosphere pollutants emission standards in the world.
As low NOxOne of representative of combustion technology, coal powder pre-burning technology are developed rapidly in recent years.Coal dust into
Before entering burner, the precombustion chamber heated by external heat source is first flowed into.Since the oxygen content that First air carries is far below coal
Amount of oxygen needed for powder completely burned, precombustion chamber is interior to be presented reducing atmosphere.Coal dust heated fast decoupled in precombustion chamber, releases
A large amount of volatile matters, while being precipitated in a gaseous form with a large amount of nitrogenous compounds.The burning of volatile matter part, provides heat for precombustion chamber
Amount.Under reducing atmosphere of the excess air coefficient much smaller than 1, HCN, NH3Etc. nitrogenous intermediate product and NOxBy a series of
Reaction is reduced into N2, so that NOxGeneration and discharge significantly reduce.However, single coal powder pre-burning technology is needed pre-burning
Room is arranged before burner, and precombustion chamber needs to heat by external heat source, and a whole set of burner is not only made to become multiple
It is miscellaneous, and need to consume external fuel to maintain system to operate normally.
Air classification is as low NOxCombustion air is segmented by multistage air distribution and is sent into combustion by the Typical Representative of combustion technology
Region is burnt, fuel-rich regions and local reduction atmosphere is formed, can obviously inhibit NO in Biomass/Pulverized Coal combustion processxIt is raw
At NO is effectively reducedxFinal discharge.By the rationalization of burner, by fuel pre-burning and two kinds of low NO of air classificationxBurning
Technology is coupled, it is made to play collaboration denitration effect, while playing the role of simplifying burner and saving fuel cost.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of compact-sized, increasing
Strong burner to the adaptability of Biomass/Pulverized Coal difference combustion system (individually burning, mixed combustion), meet across Load Regulation, improve
NO in Biomass/Pulverized Coal combustion stability and reduction Biomass/Pulverized Coal combustion processxWhat is generated can be used for Biomass/Pulverized Coal list
Solely burning or mixed combustion can be across the low NO of Load RegulationxBurner, the burner can by adjust outer second air whether come into operation come
The requirement for meeting actual load, achievees the purpose that across Load Regulation.Meanwhile the burner is by Biomass/Pulverized Coal pre-burning and air
Classification, which is coupled, plays collaboration denitration effect, and Biomass/Pulverized Coal is pyrolyzed in the precombustion chamber of reducing atmosphere and releases volatile matter
And part burn nitrogenous compound is restored, into burner hearth primary mixture under reducing atmosphere high-temperature and low-oxygen combustion, make
Obtain NOxGenerating significantly reduces.
In order to achieve the above object, the technical scheme adopted by the utility model is
It is a kind of to can be used for biomass or coal dust be across the low NO of Load RegulationxBurner, including pre-burning room housing, and connection
Secondary Air sleeve in pre-burning room housing is cased with the SOFA windband cylinder with SOFA wind entrance, SOFA wind entrance in precombustion chamber
Circumferentially disposed SOFA wind direct current spout and SOFA wind eddy flow spout, corresponding SOFA wind direct current spout and SOFA are provided in channel
Wind eddy flow nozzle is equipped with controllable register；Outer First air sleeve, inner second air sleeve and interior one are successively cased in Secondary Air sleeve
Secondary windband cylinder, is cased with central tube in interior First air sleeve, center tube end be fixed with by oil gun or gas gun, high-energy igniter with
And the igniting system that the igniting propeller for pushing oil gun or gas gun and high-energy igniter to be moved forward and backward in central tube is constituted
System, oil gun or gas gun and high-energy igniter are stretched in precombustion chamber by center pipe end；
Interior primary air flow+inner second air of the mixture of Biomass/Pulverized Coal and air is sent by the interior First air sleeve
Sleeve is sent into outer primary air flow+outer two that inner second air amount+outer First air sleeve is sent into the mixture of Biomass/Pulverized Coal and air
Total blast volume < 0.5 needed for secondary windband cylinder is sent into outer second air amount/fuel combustion.
For above-mentioned technical proposal, the further preferred scheme of the utility model is:
Further, the Secondary Air cartridges sides offer the outer secondary of the mixture entrance of Biomass/Pulverized Coal and air
Wind entrance is equipped with along the adjustable tangential swirl leaf of the circumferentially disposed outer second air of central tube central axis in the air duct of outer second air entrance
Piece.
Further, the outer First air sleeve connection is on the outer second air entrance of Secondary Air sleeve, and extends into secondary
In windband cylinder, end is flushed with Secondary Air sleeve inner end portion, and outer First air sleeve is equipped with outer First air entrance.
Further, the inner second air sleeve connection is on the outer First air entrance of First air sleeve, and extends into primary
In windband cylinder, a distance is shortened than First air sleeve inner end portion in end, and inner second air cartridges sides offer inner second air
Entrance is equipped with along the adjustable tangential swirl blade of the circumferentially disposed inner second air of central tube central axis in inner second air entrance.
Further, the blade of the adjustable tangential swirl blade of the outer second air and the adjustable tangential swirl blade of inner second air
Eddy flow angle be α, 50 °≤α≤70 °.
Further, the interior First air sleeve connection is on the inner second air entrance of inner second air sleeve, and extends into interior
In Secondary Air sleeve, end is flushed with inner second air sleeve inner end portion, and interior First air cartridges sides offer interior First air and enter
Mouthful.
Further, the outer First air sleeve and outer second air barrel end are compared to center pipe end elongation d2 length；
Lenth ratio d2/d=0.2~0.25 between the length d2 of elongation and the outside diameter d of outer second air sleeve.
Further, the inner second air sleeve and interior First air barrel end are compared to center pipe end elongation d1 length；
Lenth ratio d1/d=0.1~0.15 between the length d1 of elongation and the outside diameter d of outer second air sleeve.
Further, the angle of the SOFA wind eddy flow spout and pre-burning room housing is θ, 60 °≤θ≤80 °.
Compared with prior art, the utility model has the following beneficial effects:
The utility model provide it is a kind of can be used for Biomass/Pulverized Coal individually burn or mixed combustion can be across the low of Load Regulation
NOxBurner.Since the supply mode of First air has been divided into interior First air and the air-supply of outer First air channel, so as to according to not
Same combustion system (individually burning and mixed combustion), realizes that biomass and Pulverized Coal classification dispense；Fuel when biomass, coal dust mixed combustion
(mixture of biomass and air is sent by interior First air entrance, and the mixture of coal dust and air is by outer First air for classification dispatching
Entrance is sent into) combustion process that can preferably control biomass, the efficiency of combustion of boiler is kept, flexible modulation biomass is mixed
Mixed ratio.Biomass contains a large amount of volatile matters, is precipitated rapidly at low temperature and then biomass burning volatile matter and coal rob oxygen burning,
To be formed compared with low oxygen concentration, and NO in bedxFormation depend on fuel in nitrogen oxidation process and bed in reducing substances (such as
Coke and HCN, NH3Nitrogen substance) to NOxReduction decomposition process between balance have when excess air coefficient is low in bed
Conducive to NOxReduction decomposition reaction；Biomass N content itself is far below coal, thus plays " dilution " to overall NO conversion ratio；
Contain a certain amount of HCN and NH in the volatile components that biomass releases3, NH3NH can be resolved into2And NH, they can be incited somebody to action
NO is reduced into N2, to play the role of reducing NOx；Biomass straw belongs to fibre structure, is formed after Volatile a large amount of
Porous coke promotes NOxWith the reduction reaction of coke.When underrun, interior First air channel, inner second air channel,
Outer First air channel and burnout degree channel are put into operation；When heavy-duty service, interior First air channel, inner second air channel, outer one
Secondary wind channel, outer second air channel and burnout degree channel are put into operation.For underload and heavy-duty service, eddy flow inner second air
It can roll up and inhale high ambient temperatures flue gas, form the stability that burning is improved in recirculating zone, the burning of Biomass/Pulverized Coal is promoted to consume oxygen
Form oxygen deprivation, reducing atmosphere makes NOxProduction quantity reduces；For underrun, outer First air is equivalent to secondary in direct current
Wind can promote the burning of Biomass/Pulverized Coal, maintain the stability of burning；For heavy-duty service, eddy flow outer second air can be rolled up
High ambient temperatures flue gas is inhaled, the stability that burning is improved in recirculating zone is formed, promotes the burning consumption oxygen of Biomass/Pulverized Coal to be formed poor
Oxygen, reducing atmosphere further decrease NOxProduction quantity.
Further, the utility model precombustion chamber shell end outer rim circumferentially symmetrically offers 12 along precombustion chamber outlet axes
A SOFA wind direct current spout and 12 SOFA wind eddy flow spouts.When underrun, SOFA wind direct current spout is closed, SOFA wind
The smoke backflow for inhaling a large amount of high-temperature low-oxygens from jet boundary volume by SOFA wind eddy flow spout, so that reduction is presented in coal dust primary zone
Property atmosphere, promote combustion process in NOxReduction, further decreases NOxIt generates；When heavy-duty service, SOFA wind eddy flow spout is closed
It closes, SOFA wind injects burner hearth, the adjustable direction of SOFA wind direct current spout and height by SOFA wind direct current spout to reduce furnace
Thorax exports smoke temperature, prevents slagging.
Further, the utility model inner second air sleeve, interior First air barrel end are extended compared to center pipe end
D1 length；Outer First air sleeve, outer second air barrel end extend d2 length compared to center pipe end, keep vortex gas-flow inclined
Disturbance of the vortex gas-flow to ignition point is reduced from flame of centre, the pyrolysis time of elongation center combustion zone enhances reproducibility gas
Atmosphere reduces NOxIt generates.
Further, the utility model is provided with high-energy igniter, oil gun or gas gun, igniting propeller, improves automatic
Change horizontal.When needing to light a fire, propeller moves forwards a high-energy igniter and oil gun or gas gun is sent to ignition location.Igniting
After, propeller moves forwards, and high-energy igniter and oil gun or gas gun are shunk back central tube, avoids high temperature from washing away, is rotten
Erosion and coking pollution, extend the service life of high-energy igniter and oil gun or gas gun.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
It does not constitute improper limits to the present invention, in the accompanying drawings:
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the cross-sectional view in the direction the utility model A-A；
Fig. 3 is the right view of the utility model；
Fig. 4 is the cross-sectional view in the direction the utility model B-B；
Fig. 5 is the partial sectional view of the utility model SOFA wind snout.
Wherein, 1 is high-energy igniter；2 be oil gun or gas gun；3 be igniting propeller；It is managed centered on 4；5 be interior primary
Windband cylinder；6 be interior First air entrance；7 be inner second air entrance；8 be inner second air sleeve；9 be outer First air entrance；10 are
Outer First air sleeve；11 be outer second air entrance；12 be outer second air sleeve；13 be SOFA wind entrance；14 be SOFA windband cylinder；
15 be pre-burning room housing；16 be controllable register；17 be SOFA wind direct current spout；18 be SOFA wind eddy flow spout；19 be outer secondary
Wind is adjustable tangential swirl blade；20 be the adjustable tangential swirl blade of inner second air.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing and specific embodiment, in the signal of this utility model
Property embodiment and explanation be used to explain the utility model, but be not intended to limit the scope of the present invention.
Referring to Fig. 1 to Fig. 5, the utility model can be used for biomass or coal dust can be across the low NO of Load RegulationxBurner, packet
The precombustion chamber surrounded by pre-burning room housing 15 is included, combustion chamber periphery connects outer second air sleeve 12；15 outer sheath of pre-burning room housing
There is a SOFA windband cylinder 14, it is straight that 15 end outer rim of pre-burning room housing along precombustion chamber outlet axes circumferentially symmetrically offers 12 SOFA wind
Flow spout 17 and 12 SOFA wind eddy flow spout 18.Precombustion chamber inlet is successively set with central tube 4, interior First air from the inside to the outside
Sleeve 5, inner second air sleeve 8, outer First air sleeve 10 and outer outer second air sleeve 12.4 end of central tube is fixed with by oil gun
Or gas gun 2, high-energy igniter 1 and for push oil gun or gas gun 2 and high-energy igniter 1 in central tube 4 front and back move
The ignition system that dynamic igniting propeller 3 is constituted, oil gun or gas gun 2 and high-energy igniter 1 are stretched to pre- by 4 end of central tube
Combustion is indoor.
12 side of outer second air sleeve offers the outer second air entrance of the mixture entrance of Biomass/Pulverized Coal and air
11, it is equipped with along the adjustable tangential swirl leaf of the circumferentially disposed outer second air of 4 central axis of central tube in the air duct of outer second air entrance 11
Piece 19, the eddy flow angle of blade are α, 50 °≤α≤70 °, as shown in Figure 4.
Outer First air sleeve 10 is connected on the outer second air entrance 11 of outer second air sleeve 12, and extends into outer second air
In sleeve 12, end is flushed with 12 inner end of outer second air sleeve, and outer First air sleeve 10 is equipped with outer First air entrance 9.
Inner second air sleeve 8 is connected on the outer First air entrance 9 of outer First air sleeve 10, and extends into an outer windband
In cylinder 10, a distance is shortened than outer 10 inner end of First air sleeve in end, and 8 side of inner second air sleeve offers interior secondary
Wind entrance 7 is equipped with along the adjustable tangential swirl blade of the circumferentially disposed inner second air of 4 central axis of central tube in inner second air entrance 7
20, the eddy flow angle of blade is α, 50 °≤α≤70 °, as shown in Figure 2.
Interior First air sleeve 5 is connected on the inner second air entrance 7 of inner second air sleeve 8, and extends into inner second air set
In cylinder 8, end is flushed with 8 inner end of inner second air sleeve, and interior 5 side of First air sleeve offers interior First air entrance 6.
Inner second air sleeve 8, interior 5 end of First air sleeve extend d1 length compared to center pipe end and meet d1/d=
0.1~0.15 (outer second air sleeve outer diameter is d)；Outer First air sleeve 10,12 end of outer second air sleeve are compared to central tube
End extends d2 length and meets d2/d=0.2~0.25 (outer second air sleeve outer diameter is d).
The mixture of Biomass/Pulverized Coal and air is sent by interior First air entrance 6, and at interior First air sleeve 5 and center
It is flowed in circular passage between pipe 4；The mixture of Biomass/Pulverized Coal and air is sent by outer First air entrance 9, and outside one
It is flowed in circular passage between secondary windband cylinder 10 and inner second air sleeve 8；Inner second air is in inner second air sleeve 8 and interior primary
It is flowed in circular passage between windband cylinder 5；Ring of the outer second air between outer second air sleeve 12 and outer First air sleeve 10
It is flowed in shape channel；SOFA wind flows in the circular passage between 15 outer surface of SOFA windband cylinder 14 and pre-burning room housing.It is interior
50 °≤α≤70 ° of eddy flow angle for the adjustable tangential swirl blade 20 of inner second air being arranged in 7 channel of Secondary Air entrance；It is interior secondary
Wind enters precombustion chamber in a manner of rotating jet；Interior First air enters precombustion chamber in a manner of direct jet；Outer second air entrance 11 is logical
50 °≤α≤70 ° of eddy flow angle for adjustable 19 blade of tangential swirl blade of outer second air being arranged in road；Outer second air is with eddy flow
Mode of jet enters precombustion chamber；Outer First air enters precombustion chamber in a manner of direct jet；Inner second air sleeve 8, an interior windband
5 ends of cylinder extend d1 length compared to 4 end of central tube；Outer First air sleeve 10,12 end of outer second air sleeve are compared in
4 end of heart pipe extends d2 length；SOFA wind is sent by SOFA wind entrance 13, and in SOFA windband cylinder 14 and pre-burning room housing 15
It is flowed in circular passage between outer surface.
The principles of the present invention:
The recirculating zone volume that the utility model is formed in precombustion chamber using eddy flow inner second air and eddy flow outer second air is inhaled high
Warm flue gas heats the indoor coal dust of pre-burning, and coal dust heated fast decoupled in precombustion chamber releases a large amount of volatile matters,
It is precipitated in a gaseous form with a large amount of nitrogenous compounds simultaneously.The burning of volatile matter part, provides heat for precombustion chamber.In excessive sky
Under reducing atmosphere of the gas coefficient much smaller than 1, nitrogenous compound is reduced into N by series reaction in precombustion chamber2, so that
NOxGenerating significantly reduces.Meanwhile flowing back into the high-temperature flue gas of precombustion chamber that oxygen content is relatively low, it further reduced pre-burning
Indoor oxygen concentration inhibits NOxIt generates.
In order to guarantee the indoor low-oxygen environment of pre-burning, it is desirable that:
(interior primary air flow (Biomass/Pulverized Coal)+inner second air amount+outer primary air flow (Biomass/Pulverized Coal)+outer second air
Amount) theoretical calculation total blast volume < 0.5 needed for/fuel combustion.
That is excess air coefficient total in precombustion chamber is less than 0.5.
Due in precombustion chamber excess air coefficient less than 0.5, the indoor oxygen of pre-burning almost by Biomass/Pulverized Coal pyrolysis with
The burning of volatile matter part runs out.Therefore unburned volatile matter, high-temperature flue gas and Biomass/Pulverized Coal particle etc. are conveyed into furnace
It is practically free of oxygen in the mixed gas of thorax, is conducive to tissue biological's matter/coal dust high-temperature and low-oxygen combustion in burner hearth, further
Reduce NOxIt generates.
The utility model precombustion chamber shell end outer rim circumferentially symmetrically offers 12 SOFA wind along precombustion chamber outlet axes
Direct current spout 17 and 12 SOFA wind eddy flow spout 18, part SOFA wind sprays into furnace from SOFA wind direct current spout in a manner of direct current
Thorax；SOFA wind eddy flow spout and the angle of pre-burning room housing are θ, 60 °≤θ≤80 °, make the SOFA wind sprayed around precombustion chamber
Outlet axes form swirling eddy, and part SOFA wind sprays into burner hearth from SOFA wind eddy flow spout with cyclone mode, realizes SOFA wind
Second level eddy flow improves the intensity of eddy flow SOFA wind rotating jet, is conducive to roll up from jet boundary and inhales a large amount of high temperature gases recirculatings,
So that reducing atmosphere is presented in coal dust primary zone, into burner hearth primary mixture in primary zone high-temperature and low-oxygen combustion, promote combustion
NO during burningxReduction, further decreases NOxIt generates.Be provided in 13 channel of SOFA wind entrance with SOFA wind direct current spout 17 and
The corresponding controllable register 16 of SOFA wind eddy flow spout 18, as shown in Fig. 5.Controllable register 16 is in different location and SOFA is adjusted
Wind sprays into the ratio of burner hearth from SOFA wind direct current spout 17 and from SOFA wind eddy flow spout 18.It is straight that controllable register blocks SOFA wind
When flowing spout, SOFA wind, which is sprayed in a manner of rotating jet from SOFA wind eddy flow spout, enters burner hearth；Controllable register blocks SOFA wind
When eddy flow spout, SOFA wind, which is sprayed in a manner of direct jet from SOFA wind direct current spout, enters burner hearth.
The course of work of the utility model:
Firstly, being directed to the demand of different actual loads, the outer second air satisfaction that chooses whether to come into operation is across Load Regulation.Underload
When operation, interior First air channel, inner second air channel, outer First air channel and burnout degree channel are put into operation, and outer second air is logical
Road is closed；The mixture of fuel and air is sent by interior First air entrance, and the ring between interior First air sleeve and central tube
It is flowed in shape channel；When heavy-duty service, interior First air channel, inner second air channel, outer First air channel, outer second air channel
It puts into operation with burnout degree channel.The mixture of fuel and air is sent by interior First air entrance and outer First air entrance, and
Annular in circular passage between interior First air sleeve and central tube and between outer First air sleeve and inner second air sleeve
It is flowed in channel；At the same time under biological substance for combustion and two kinds of fuel conditions of coal dust, the mixture of biomass and air is by interior primary
Wind entrance is sent into and is flowed in the circular passage between interior First air sleeve and central tube, and the mixture of coal dust and air is by outer
First air entrance is sent into and is flowed in the circular passage between outer First air sleeve and inner second air sleeve；Outer second air is outside
It is flowed in circular passage between Secondary Air sleeve and outer First air sleeve；SOFA wind is in SOFA windband cylinder and pre-burning room housing
It is flowed in circular passage between outer surface.
Inner second air and outer second air are sent by inner second air entrance 7 and outer second air entrance 11, inner second air exists
It is flowed in circular passage between inner second air sleeve 8 and interior First air sleeve 5, outer second air is in outer second air sleeve 12 and outside
It flows, and enters in precombustion chamber in circular passage between First air sleeve 10, to precombustion chamber progress 1 minute or more purging.
Then igniting propeller 3 is moved forwards, high-energy igniter 1 and oil gun or gas gun 2 is sent to specified igniting
Position.High-energy igniter 1 works, and puts the fuel that oil combustion gun or gas gun 2 export.For the demand of different actual loads, selection
The outer second air that whether comes into operation meets across Load Regulation.Inner second air and outer second air are passed through into inner second air entrance 7 and outer secondary
Wind entrance 11 is sent into, and inner second air flows in the circular passage between inner second air sleeve 8 and interior First air sleeve 5, and outer two
Secondary wind flows in the circular passage between outer second air sleeve 12 and outer First air sleeve 10, and enters in precombustion chamber.Interior two
It is provided with the adjustable tangential swirl blade 20 of inner second air in secondary 7 channel of wind entrance, is provided in 11 channel of outer second air entrance outer
Secondary Air is adjustable tangential swirl blade 19, eddy flow inner second air and eddy flow outer second air form recirculating zone in precombustion chamber, improve
The stability of coal powder ignition.
It is dispensed according to fuel staging, Biomass/Pulverized Coal and air mixture, the mixture is sent by interior First air entrance 6
It flows in circular passage between interior First air sleeve 5 and central tube 4, after entering precombustion chamber, is pyrolyzed, and by oil gun
Or the flame ignition that the outlet of gas gun 2 generates；Biomass/Pulverized Coal and air mixture, the mixing are sent by outer First air entrance 9
Object flows in the circular passage between outer First air sleeve 10 and inner second air sleeve 8, and after entering precombustion chamber, heat occurs
Solution, and the flame ignition generated by oil gun or the outlet of gas gun 2.
SOFA wind is sent by SOFA wind entrance 13, SOFA wind SOFA windband cylinder 14 and 15 outer surface of pre-burning room housing it
Between circular passage in flow.15 end outer rim of pre-burning room housing circumferentially symmetrically offers 12 SOFA along precombustion chamber outlet axes
Wind direct current spout 17 and 12 SOFA wind eddy flow spouts 18.Controllable register 16 is in different location and SOFA wind is adjusted from SOFA wind
Direct current spout 17 and the ratio that burner hearth is sprayed into from SOFA wind eddy flow spout 18.When controllable register 16 closes SOFA wind direct current spout,
SOFA wind injects precombustion chamber by SOFA wind eddy flow spout, while supplement coal dust burns away required oxygen, out of burner hearth
Volume inhales the smoke backflow of a large amount of high-temperature low-oxygens, so that reducing atmosphere is presented in coal dust primary zone, promotes NO in combustion processxAlso
Original further decreases NOxIt generates；When controllable register 16 closes SOFA wind eddy flow spout, SOFA wind passes through SOFA wind direct current spout
Precombustion chamber is injected, furnace outlet gas temperature can be reduced, prevent slagging.Unburned volatile matter, high-temperature flue gas and pulverized coal particle shape
At mixture uniformly mixed in the precombustion chamber second half section, be then fed into hearth combustion.
After precombustion chamber flameholding, igniting propeller 3 is acted, will be in high-energy igniter 1 and the retraction of oil gun or gas gun 2
In heart pipe 4, to prolong its service life.
The above content is only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, any changes made on the basis of the technical scheme each falls within this reality
Within protection scope with novel claims.
Claims (9)
- It can be used for biomass or coal dust can be across the low NO of Load Regulation 1. a kind ofxBurner, which is characterized in that including precombustion chamber shell The precombustion chamber that body (15) surrounds, and the outer second air sleeve (12) being connected on pre-burning room housing (15) are cased with band in precombustion chamber There is the SOFA windband cylinder (14) of SOFA wind entrance (13), it is straight to be provided with circumferentially disposed SOFA wind in SOFA wind entrance (13) channel Spout (17) and SOFA wind eddy flow spout (18) are flowed, is set at corresponding SOFA wind direct current spout (17) and SOFA wind eddy flow spout (18) There are controllable register (16)；Outer First air sleeve (10), inner second air sleeve (8) and interior are successively cased in outer second air sleeve (12) First air sleeve (5), interior First air sleeve (5) is interior to be cased with central tube (4), and central tube (4) end is fixed with by oil gun or combustion gas Rifle (2), high-energy igniter (1) and for push oil gun or gas gun (2) and high-energy igniter (1) in the central tube (4) before The ignition system that the igniting propeller (3) moved afterwards is constituted, oil gun or gas gun (2) and high-energy igniter (1) are by central tube (4) End stretches in precombustion chamber.
- It can be used for biomass or coal dust can be across the low NO of Load Regulation 2. according to claim 1xBurner, feature exist In outer second air sleeve (12) side offers outer second air entrance (11), sets in the air duct of outer second air entrance (11) Have along the adjustable tangential swirl blade (19) of the circumferentially disposed outer second air of central tube (4) central axis.
- It can be used for biomass or coal dust can be across the low NO of Load Regulation 3. according to claim 2xBurner, feature exist In the outer First air sleeve (10) is connected on the outer second air entrance (11) of outer second air sleeve (12), and extends into outer In Secondary Air sleeve (12), end is flushed with outer second air sleeve (12) inner end, and outer First air sleeve (10) is equipped with outer First air entrance (9).
- It can be used for biomass or coal dust can be across the low NO of Load Regulation 4. according to claim 1xBurner, feature exist In the inner second air sleeve (8) is connected on the outer First air entrance (9) of outer First air sleeve (10), and extends into outer one In secondary windband cylinder (10), a distance, inner second air sleeve (8) side are shortened than outer First air sleeve (10) inner end in end Face offers inner second air entrance (7), in inner second air entrance (7) be equipped with along central tube (4) central axis it is circumferentially disposed interior two The secondary adjustable tangential swirl blade (20) of wind.
- 5. can be used for biomass or coal dust can be across the low NO of Load Regulation according to claim 2-4 is described in any itemxBurner, It is characterized in that, the leaf of outer second air adjustable the tangential swirl blade (19) and the adjustable tangential swirl blade (20) of inner second air The eddy flow angle of piece be α, 50 °≤α≤70 °.
- It can be used for biomass or coal dust can be across the low NO of Load Regulation 6. according to claim 1xBurner, feature exist In the interior First air sleeve (5) is connected on the inner second air entrance (7) of inner second air sleeve (8), and extends into interior secondary In windband cylinder (8), end is flushed with inner second air sleeve (8) inner end, and interior First air sleeve (5) side offers interior primary Wind entrance (6).
- It can be used for biomass or coal dust can be across the low NO of Load Regulation 7. according to claim 1xBurner, feature exist In the outer First air sleeve (10) and outer second air sleeve (12) end are compared to central tube (4) end elongation d2 length；It stretches Lenth ratio d2/d=0.2~0.25 between the outside diameter d of long length d2 and outer second air sleeve.
- It can be used for biomass or coal dust can be across the low NO of Load Regulation 8. according to claim 1xBurner, feature exist In the inner second air sleeve (8) and interior First air sleeve (5) end are compared to central tube (4) end elongation d1 length；Elongation Length d1 and outer second air sleeve outside diameter d between lenth ratio d1/d=0.1~0.15.
- It can be used for biomass or coal dust can be across the low NO of Load Regulation 9. according to claim 1xBurner, feature exist Angle in, the SOFA wind eddy flow spout (18) and pre-burning room housing (15) is θ, 60 °≤θ≤80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820843076.4U CN208418735U (en) | 2018-06-01 | 2018-06-01 | It can be used for biomass or coal dust can be across the low-NOx combustor of Load Regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820843076.4U CN208418735U (en) | 2018-06-01 | 2018-06-01 | It can be used for biomass or coal dust can be across the low-NOx combustor of Load Regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208418735U true CN208418735U (en) | 2019-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820843076.4U Expired - Fee Related CN208418735U (en) | 2018-06-01 | 2018-06-01 | It can be used for biomass or coal dust can be across the low-NOx combustor of Load Regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208418735U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594689A (en) * | 2020-12-15 | 2021-04-02 | 北京理工大学 | High-temperature high-speed stable combustion method and device based on multistage jet flow and rotational flow |
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2018
- 2018-06-01 CN CN201820843076.4U patent/CN208418735U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594689A (en) * | 2020-12-15 | 2021-04-02 | 北京理工大学 | High-temperature high-speed stable combustion method and device based on multistage jet flow and rotational flow |
| CN112594689B (en) * | 2020-12-15 | 2021-11-05 | 北京理工大学 | High-temperature high-speed stable combustion method and device based on multistage jet flow and rotational flow |
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Granted publication date: 20190122 Termination date: 20190601 |