CN106090894A - The all-oxygen combustion device of a kind of low NOx and combustion method thereof and application - Google Patents
The all-oxygen combustion device of a kind of low NOx and combustion method thereof and application Download PDFInfo
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- CN106090894A CN106090894A CN201610711036.XA CN201610711036A CN106090894A CN 106090894 A CN106090894 A CN 106090894A CN 201610711036 A CN201610711036 A CN 201610711036A CN 106090894 A CN106090894 A CN 106090894A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/10—Furnace staging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses the all-oxygen combustion device of a kind of low NOx and combustion method thereof and application, this all-oxygen combustion device includes: at least two or branched fuel nozzle, and fuel nozzle is arranged at horizontal level interval；With fuel nozzle the first oxygen spray pipe one to one, the first oxygen spray pipe diameter is more than the diameter of fuel nozzle, the annulus ejection that oxygen is formed between fuel nozzle and the first oxygen spray pipe；Being positioned at fuel nozzle lower horizontal or two or branched second oxygen spray pipe of periphery layout, the second oxygen spray pipe interval is arranged；And at least one or two trioxid jet pipes, trioxid jet pipe is positioned at fuel nozzle and the left side of the second oxygen spray pipe and/or right side.The all-oxygen combustion device of the present invention can be effectively improved efficiency of combustion and burn-off rate, improves flameemi ivity, reduces flame temperature, reduce NOx emission, reduce energy consumption and pollution, improve product quality, improves the purpose of furnace service life.
Description
Technical field
The present invention relates to all-oxygen combustion device and the burning side of the High-temp. kilns such as a kind of glass, non-ferrous metal metallurgy, iron and steel
Method, particularly relates to the all-oxygen combustion device of a kind of low NOx and realizes combustion method and the application of low NOx drainage.
Background technology
There is a large amount of thermal-flame kiln, thermal-flame kiln in the industries such as glass, non-ferrous metal metallurgy, iron and steel, boiler, petrochemical industry
Stove is owing to using various Fossil fuels, and burning produces substantial amounts of pollutant.Natural gas is the fuel of a kind of relative clean, with natural
Gas substitutes coal, heavy oil or other fuel, although can reduce to a certain extent SO2 and heavy metal, H2S, fluoride etc. other
The emission level of pollutant, but NOx emission concentration is the most of a relatively high.NOx is to form atmospheric pollution and the important dirt of haze
One of dye source, is also the major pollutants of environment protection control.
During high-temp combustion, the generation of NOx has the mechanism of self.Based on NOx formation mechenism in combustion
Research, studies both at home and abroad, develops numerous low-NOx combustor, burner and combustion methods.Such as patent CN201534816U
Disclosing the total oxygen spray gun of a kind of natural gas that burns, be provided with rectangular oxygen and natural gas hybrid channel, purity oxygen passage sets
Put in oxygen and the lower section of natural gas hybrid channel, form Flat-flame.This invention oxygen classification is limited, flame peak temperature
High, it is difficult to by NOx reduction.Patent CN102252324A discloses a kind of method of combusting fuel reburning low-nitrogen, mainly should
It is used in boiler, utilizes coal pulverizer and pulverized coal preparation system to fire de-in upper strata burner feeding stove again by the coal dust of conventional fineness
Nitre, finally utilizes burnout degree (OFA) to carry out after-flame, it is achieved the clean combustion method of NOx at the bottom of coal-burning boiler.This patent achieve with
Air is that oxidant multiple spot classification feeds, but main application and boiler, it is difficult to it is applied to the industrial furnaces such as the glass of routine, smelting
Kiln.Patent CN101381196 discloses a kind of fuel step adding apparatus of glass melter total oxygen combustion, arranges main fuel pipe, and
In the main fuel tank left and right sides, two secondary cartridges are set, this device can by adjust main burner and two secondary cartridges it
Between use fuel quantity, regulate the length of flame, area coverage.
Additionally, patent CN102635856A discloses a kind of petroleum coke powder full oxygen combustor, include inner and outer pipes, oil
Coke powder is that fuel burns with oxygen mix, makes coke powder fully burn, improves coke powder utilization rate.And United States Patent (USP)
US005575637A discloses the flat flame burner of a kind of applicable glass furnace, oxygen and natural gas in tubaeform premix combustion
Burn room to carry out laminar flow, mix and burn, form flame coverage rate big, the natural gas all-oxygen combustion method that flame is bright.
But above-mentioned patent makes oxygen flow out with roughly the same speed with natural gas, and coutroi velocity size, thus presents laminar flow, extends
Oxygen and the incorporation time of natural gas, control the length of flame and brightness, reduce NOx emission concentration to a certain extent, do not have
Realizing the classification of oxygen and fuel, NOx concentration is difficult to reduce further.
Summary of the invention
The present invention solves the problems referred to above of the prior art, propose a kind of low NOx, the total oxygen of ultra-low NOx emission concentration
Burner and combustion method thereof and application, apparatus of the present invention, by the classification of fuel and oxygen being sprayed into, form bright, spoke
Penetrate that performance is high, flame broad covered area, form the burning of disperse formula in whole combustion space, significantly reduce existing all-oxygen combustion device and
NOx emission concentration, improves brightness and improves Fire Radiation ability, reduces energy consumption, improves product quality, improves furnace service life.
For achieving the above object, the present invention is by the following technical solutions:
The first aspect of the invention is to provide the all-oxygen combustion device of a kind of low NOx, including:
At least two or branched fuel nozzle, described fuel nozzle is arranged at horizontal level interval, to form fuel staging
Feed；
With described fuel nozzle the first oxygen spray pipe one to one, described first oxygen spray pipe diameter is more than described fuel
The diameter of jet pipe, the annulus ejection that oxygen is formed between described fuel nozzle and described first oxygen spray pipe；
It is positioned at described fuel nozzle lower horizontal or two or branched second oxygen spray pipe of periphery layout, described second oxygen
Gas blowout pipe interval is arranged；And
At least one or two trioxid jet pipes, described trioxid jet pipe is positioned at described fuel nozzle and described
The left side of two oxygen spray pipes and/or right side.
Further, when described trioxid jet pipe is only one, it is positioned at described fuel nozzle and described second oxygen
The left side of jet pipe or right side, or when described trioxid jet pipe is two, it is positioned at described fuel nozzle and described second oxygen
The left and right sides of gas blowout pipe；Additionally, described trioxid jet pipe can be both above lays respectively at described fuel nozzle and described
The left side of the second oxygen spray pipe and/or right positions.
When using this device, can with suitable allocation oxygen percentage between first, second and third jet pipe, and
The flow spray regime of fuel and/or oxygen, can be effectively improved efficiency of combustion and burn-off rate, improves flameemi ivity, reduces fire
Flame temperature, reduces NOx emission, reduces energy consumption and pollution, improves product quality, improves the purpose of furnace service life.
Further, within the fuel nozzle ports of described fuel nozzle is positioned at hot working face, described fuel nozzle ports is with described
Form fuel between hot working face to be pre-mixed with the oxygen of described first oxygen spray pipe, tentatively light a fire and the pre-burning of steady combustion
Room, 1 to 10 times of the fuel nozzle ports diameter of a length of described fuel nozzle of described precombustion chamber, preferably 2-8 times；More preferably
4-6 times.
Further, described hot working face is by the brick one-tenth of high-temperature-resistant burner nozzle.
Further, described fuel nozzle, the first oxygen spray pipe, the second oxygen spray pipe and trioxid jet pipe all lay with
In described hot working face；Described fuel nozzle is positioned at described first oxygen spray pipe.
Further, the fuel spray of described fuel nozzle, the first oxygen spray pipe, the second oxygen spray pipe and trioxid jet pipe
Mouth is circular spout.
Further, described precombustion chamber is the vertical channel being vertically installed in described hot working face, or with certain angle
Degree is obliquely installed the ramp way in described hot working face.Specifically, the combustion of the burner centrage left and right sides it is positioned at
The precombustion chamber that material jet pipe and the first oxygen spray pipe and hot working face are formed can be vertical channel, or described precombustion chamber is in spray
Near exit both sides the most to the left and right diffusion certain angle, becomes autgmentability to eject.
Further, described second oxygen spray pipe and described fuel nozzle central axis distance are described second oxygen spray
1 to 50 times of pipe diameter；Preferably 1 to 40 times；Preferably 1 to 30 times；More preferably 1 to 15 times.
Further, the horizontal range between described second oxygen spray pipe is the 2-50 of described second oxygen spray pipe diameter
Times；It is preferably 3-20 times.
Further, the spacing between the centrage of described trioxid jet pipe and immediate described fuel nozzle is institute
State fuel nozzle internal diameter 10-500 times；It is preferably 20-300 times；It is preferably 30-250 times；It is preferably 50-200 times；It is preferably
80-150 times；More preferably 100-120 times.
Further, described fuel nozzle, the first oxygen spray pipe, the second oxygen spray pipe and trioxid jet pipe are equipped with
Flow-rate adjustment, distribution and/or switching device；It is provided with igniter at the fuel nozzle ports of described fuel nozzle.
The second aspect of the invention is to provide the combustion method of the all-oxygen combustion device of a kind of low NOx, including:
In described fuel nozzle, feed fuel, to described first oxygen spray pipe, the second oxygen spray pipe and the 3rd oxygen simultaneously
Gas blowout pipe feeds oxygen；
By adjusting oxygen and the confession of fuel that the first oxygen spray pipe, the second oxygen spray pipe and trioxid jet pipe feed
Enter allocation proportion；Or adjusting the first oxygen spray pipe, the second oxygen spray pipe and the position of trioxid jet pipe so that fuel fires completely
Burn, it is achieved fuel low NOx or ultralow NOx concentration is discharged；
Wherein, the fuel flow rate of fuel nozzle nozzle is 3～200m/s；
The oxygen concentration fed in described first oxygen spray pipe, the second oxygen spray pipe and/or trioxid jet pipe is 30-
100%, flow velocity is 3～200m/s；
0.1-1.5 times that oxygen gas flow rate is fuel flow rate fed to the first oxygen spray pipe, amount of oxygen accounts for fuel and all fires
Burn the 2%-50% of required oxygen；
The oxygen fed in described second oxygen spray pipe accounts for fuel and all burns the 0%-60% of required oxygen；
Account for fuel with the oxygen fed in described trioxid jet pipe all to burn the 0%-80% of required oxygen.
Further, described combustion method, including:
The fuel of described fuel nozzle ejection and/or the first oxygen spray pipe, the second oxygen spray pipe, the spray of trioxid jet pipe
The oxygen gone out is the most overall to be sprayed in big low discharge cyclic fluctuation；
Or for left and right arrange described fuel nozzle and/or described first oxygen spray pipe, the second oxygen spray pipe, the 3rd oxygen
The fuel of gas blowout pipe ejection and oxygen are high flow capacity and low discharge periodically alternating spray on the right side of left side.
Further, the oxygen fed in described first oxygen spray pipe, the second oxygen spray pipe and/or trioxid jet pipe is dense
Degree is 30-100%, and flow velocity is 3～200m/s.
Further, the flow velocity of described fuel is 50～100m/s；It is preferably 65～95m/s；It is preferably 70～90m/s；
It is preferably 75～85m/s；It is preferably 80m/s.
The oxygen concentration fed in described first oxygen spray pipe, the second oxygen spray pipe and trioxid jet pipe is far longer than general
The oxygen concentration (normal air oxygen concentration is 21%) of blowing air is 40-100%, preferably 50-100；More preferably 90%-
100%；More preferably 90-95%.
Further, the flow velocity of the oxygen of described first jet pipe ejection is the fuel flow rate of ejection on described fuel nozzle
0.1-1.5 times；It is preferably 0.3-1 times；It is preferably 0.4-0.8 times；More preferably 0.5-0.6 times.
Further, the amount of oxygen of described first oxygen spray pipe conveying accounts for fuel and all burns the 5%-of required oxygen
45%；It is preferably 10%-40%；It is preferably 20%-35%；More preferably 30%.
Further, the amount of oxygen of described second oxygen spray pipe conveying accounts for fuel and all burns the 0%-of required oxygen
50%；It is preferably 0%-40%；It is preferably 0%-35%；It is preferably 0%-20%；More preferably 30%.
Further, the amount of oxygen of conveying accounts for fuel and all burns the 0%-of required oxygen in described trioxid jet pipe
70%；It is preferably 0%-50%；It is preferably 0%-30%；It is preferably 0%-20%；More preferably 40%.
Further, described fuel selected from the various gaseous fuels such as natural gas, various coal gas, oil liquefied gas, fuel oil and
Solid fuel.
The third aspect of the invention is to provide the all-oxygen combustion device of a kind of low NOx in iron and steel, chemical industry, non-ferrous metal smelting
Application in refining, glass or other high-temperature industrial furnaces.
The present invention uses technique scheme, compared with prior art, has the following technical effect that
Burner of the present invention uses the multiple spot classification of fuel and oxygen to feed, and adjusts each oxygen spray pipe in actual use
Feeding the allocation proportion of oxygen, it is achieved stable, clear flame, fuel staging adds flame coverage rate, reduces flame peak value
Temperature, it is ensured that the uniformity of flame；Oxygen classification is while stable flame, and the high temperature of enhanced fuel analyses carbon, strengthens flame
Radiance and penetration power, improve heating quality；The classification of oxygen feeds, and combustion space fuel nozzle ports is formed about the combustion of local
Material enrichment region, oxygen jet burns with fuel after mixing with the combustion tail gas of combustion space again, is substantially reduced burning anti-
The concentration of seasonable oxygen, thus reduce the discharge of NOx；The present invention can improve efficiency of combustion and burn-off rate, reduces energy consumption and dirt
Dye, improves product quality, improves furnace service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of the all-oxygen combustion device of a kind of low NOx of the present invention；
Fig. 2 be a kind of low NOx of the present invention all-oxygen combustion device in the cross section signal of fuel nozzle and the first oxygen spray pipe
Figure；
Fig. 3 be a kind of low NOx of the present invention all-oxygen combustion device in fuel nozzle in hot working face layout signal
Figure；
Fig. 4 is the all-oxygen combustion device flame structure schematic diagram in use of a kind of low NOx of the present invention；
Fig. 5 be a kind of low NOx of the present invention all-oxygen combustion device in fuel and/or the first oxygen spray pipe, the second oxygen spray
Pipe, trioxid jet pipe injection oxygen the most individually and/or any both combination carry out overall wave injection illustrate
Figure；
Fig. 6 be a kind of low NOx of the present invention all-oxygen combustion device in when described fuel, and/or the first oxygen, the second oxygen
When gas, trioxid jet pipe are arranged symmetrically with, described fuel and/or the first oxygen spray pipe, the second oxygen spray pipe, trioxid jet pipe
The oxygen sprayed is the most individually and/or both combinations any periodically replace with low discharge in high flow capacity on the right side of left side
Injection schematic diagram；
Fig. 7 be a kind of low NOx of the present invention all-oxygen combustion device in when described fuel, and/or the first oxygen, the second oxygen
When gas, trioxid jet pipe are arranged symmetrically with, described fuel and/or the first oxygen spray pipe, the second oxygen spray pipe, trioxid jet pipe
The oxygen of injection is the most individually and/or both combination left and right sides any carry out high flow capacity low discharge alternating spray
During a kind of limiting case, low discharge thoroughly closes schematic diagram；
Wherein, 1-fuel nozzle, 11-fuel inlet, 12-fuel channel, 13-fuel nozzle ports, 2-the first oxygen spray pipe,
21-the first oxygen intake, 22-the first oxygen channel, 3-the second oxygen spray pipe 31-the second oxygen intake, 32-the second oxygen sprays
Mouthful, 4-trioxid jet pipe, 5-hot working face, 6-precombustion chamber, 7-combustion flame.
Detailed description of the invention
Below by specific embodiment, the present invention is carried out detailed and concrete introduction, so that being better understood from the present invention,
But following embodiment is not limiting as the scope of the invention.
As it is shown in figure 1, embodiments provide a kind of all-oxygen combustion device providing a kind of low NOx, including: at least
Two or branched fuel nozzle 1, fuel nozzle 1 is arranged at horizontal level interval, to form fuel staging infeed, fuel nozzle 1
On same horizontal plane, interval is arranged, to form bigger coverage rate in the horizontal plane, combustion flame broad covered area, heating is more
Uniformly, heating quality is high；With fuel nozzle 1 first oxygen spray pipe 2 one to one, the first oxygen spray pipe 2 diameter is more than fuel
The diameter of jet pipe 1, the annulus that oxygen is formed between fuel nozzle 1 and the first oxygen spray pipe 2 sprays into；It is positioned at fuel nozzle
Below 1 or horizontally disposed two or branched second oxygen spray pipe 3 of periphery, the second oxygen spray pipe 3 horizontal interval is arranged；And extremely
Few one or two trioxid jet pipes 4, trioxid jet pipe 4 is positioned at fuel nozzle 1 and the left side of the second oxygen spray pipe 3
And/or right side.When trioxid jet pipe 4 is only one, it is positioned at fuel nozzle 1 and the left side of the second oxygen spray pipe 3 or the right side
Side, or when trioxid jet pipe 4 is two, it is positioned at fuel nozzle 1 and the left and right sides of the second oxygen spray pipe 3；Additionally, the 3rd
Oxygen spray pipe 4 can also be more than both according to needs of production, lays respectively at fuel nozzle 1 and the second oxygen spray pipe 3
Left side and/or right positions.
As in figure 2 it is shown, the fuel nozzle ports 11 of fuel nozzle 1 is positioned at by the brick one-tenth of high-temperature-resistant burner nozzle in this burner
Within hot working face 5, form fuel between fuel nozzle ports 13 and hot working face 5 and through the first oxygen intake 21 and the first oxygen
The oxygen that gas passage 22 sprays into is pre-mixed, tentatively lights a fire and the precombustion chamber 6 of steady combustion, improves fuel temperature, promotes fuel-pyrolysis
With analysis carbon.1 to 10 times of fuel nozzle ports 11 diameter that length (indentation distance) is fuel nozzle 1 of this precombustion chamber 6, preferably 2-
8 times；More preferably 4-6 times.Within the fuel channel 12 of fuel nozzle 1 and fuel nozzle ports 13 are contracted in hot working face 5, a side
Face effectively protects high temperature erosion and the chemical erosion of stove inner exhaust gas of metal fuel spout, extends the service life of jet pipe；
It addition, within fuel nozzle 1 is contracted in the resistance to material of high temperature, can be pre-mixed with the oxygen that the first oxygen spray pipe 2 feeds, make part
Fuel is advanced combustion in resistance to material, keeps combustion flame 7 stable, and the most partially combusted fuel improves the temperature of fuel mixture
Degree, makes fuel at high temperature carry out analysing carbon, volatilizes carbon black particle, the brightness of the combustion flame 7 of raising and radiance.Highlighted
Degree flame improves the penetration performance of combustion flame 7, reduces flame peak temperature, contributes to improving heating properties, reduces NOx
Concentration of emission.
As it is shown on figure 3, precombustion chamber 6 is the vertical channel being vertically installed in hot working face 5, as shown in Fig. 3-a, 3-c；
Or it is inclined at an angle the ramp way being arranged in hot working face, as shown in Fig. 3-b.Specifically, it is positioned at burner
The fuel nozzle 1 of the centrage left and right sides and the first oxygen spray pipe 1 can be vertical with the precombustion chamber 6 that hot working face 5 is formed
Passage, or precombustion chamber near ejiction opening the most to the left and right both sides diffusion certain angle become autgmentability to eject, such as pre-burning
Room is 0-60 ° of angle at the vertical line of ejiction opening Yu hot working face, as shown in Fig. 3-b.
For accurately control and regulation fuel and the infeed rate of oxygen, improve the combustion rate of fuel, at fuel nozzle 1, first
It is equipped with Flow-rate adjustment, distribution and/or switching device on oxygen spray pipe the 2, second oxygen spray pipe 3 and trioxid jet pipe 4；And
It is provided with igniter at the fuel nozzle ports 11 of fuel nozzle 1.Additionally, with fuel nozzle 1 first oxygen spray pipe 2 one to one
Oxygen intake is interconnected, and forms same oxygen intake, to simplify design.Fuel nozzle the 1, first oxygen spray pipe the 2, second oxygen
The fuel nozzle ports of gas blowout pipe 3 and trioxid jet pipe 4 is circular spout；Fuel nozzle the 1, first oxygen spray pipe the 2, second oxygen sprays
Pipe 3 and a diameter of 0.5-5mm of trioxid jet pipe 4；It is preferably 0.7-3mm；More preferably 1-1.5mm.Second oxygen spray pipe 3
With 1 to 50 times that fuel nozzle 1 central axis distance is the second oxygen spray pipe 3 diameter；Preferably 1 to 40 times；Preferably 1 to 30
Times；More preferably 1 to 15 times, make oxygen and fuel first mix with the tail gas burnt in whole kiln combustion space, reduce combustion
Oxygen concentration during material burning and fuel concentration, be substantially reduced combustion flame 7 temperature and NOx emission concentration.And, the second oxygen
Jet pipe 3 is arranged in the lower section of fuel nozzle 1, makes the integral combustion interval of whole burner and high-temperature region move down, more leans on
The material of nearly heating, away from the arch top of high temperature kiln, which enhances the efficiency of heating surface, protects arch top simultaneously, extends the kiln longevity
Life.Horizontal range between second oxygen spray pipe 3 is 2-50 times of the second oxygen spray pipe 3 diameter；It is preferably 3-20 times；More preferably
For 8-15 times, it is more preferably 10-12 times.
Wherein, the level interval between the centrage of trioxid jet pipe 4 and immediate fuel nozzle 1 is fuel nozzle
10-500 times of 1 internal diameter；It is preferably 20-300 times；It is preferably 30-250 times；It is preferably 50-200 times；It is preferably 80-150 times；
More preferably 100-120 times, make oxygen and fuel first mix with the tail gas burnt in whole kiln combustion space, reduce combustion
Oxygen concentration during material burning and fuel concentration, then formation does not has the disperse formula of obvious flame to burn in whole kiln space,
Further reduce temperature and the NOx emission concentration of combustion flame 7.Being embodied as convenience, three times oxygen spout can be arranged
On independent refractory brick or furnace binding, and do not affect the implementation result of this patent.
The embodiment of the present invention additionally provides the combustion method of the all-oxygen combustion device of a kind of low NOx, including:
In fuel nozzle 1, feed fuel, to first oxygen spray pipe the 2, second oxygen spray pipe 3 and trioxid jet pipe simultaneously
Oxygen is fed in 4；
By adjusting first oxygen spray pipe the 2, second oxygen spray pipe 3 and the oxygen of trioxid jet pipe 4 infeed and fuel
Infeed allocation proportion；Or adjust first oxygen spray pipe the 2, second oxygen spray pipe 3 and position of trioxid jet pipe 4 so that combustion
Material burns completely, it is achieved fuel low NOx or ultralow NOx concentration is discharged, the burning in use of the all-oxygen combustion device of this low NOx
Flame 7 structure flame effect, as shown in Figure 4；
As a preferred embodiment of the present invention, this combustion method includes:
The fuel that fuel nozzle spray 1 is gone out and/or first oxygen spray pipe the 2, second oxygen spray pipe 3, trioxid jet pipe 4
The oxygen of ejection is the most overall to be sprayed in big low discharge cyclic fluctuation；Concrete as it is shown in figure 5, fuel and/or
First oxygen spray pipe, the second oxygen spray pipe, trioxid jet pipe injection oxygen the most individually and/or any both combine
The overall wave injection carried out.
Or for left and right arrange fuel nozzle and/or the first oxygen spray pipe, the second oxygen spray pipe, trioxid jet pipe spray
The fuel gone out and oxygen are high flow capacity and low discharge periodically alternating spray on the right side of left side.The most as shown in Figure 6, combustion is worked as
Material, and/or when the first oxygen, the second oxygen, trioxid jet pipe are arranged symmetrically with, fuel and/or the first oxygen spray pipe, the second oxygen
The oxygen of gas blowout pipe, trioxid jet pipe injection is the most individually and/or both combinations any are in stream high on the right side of left side
Amount and low discharge periodically alternating spray.
Or work as fuel, and/or when the first oxygen, the second oxygen, trioxid jet pipe are arranged symmetrically with, fuel and/or first
Oxygen spray pipe, the second oxygen spray pipe, trioxid jet pipe injection oxygen the most individually and/or any both combine about
Both sides carry out a kind of limiting case of high flow capacity low discharge alternating spray, and low discharge is thoroughly closed, as shown in Figure 7.
Wherein, when using this burner, oxygen can suitably be distributed between first, second and third oxygen spray pipe
The percentage of injection, and fuel and/or the injection flow of oxygen or spray regime, such as: the fuel of fuel nozzle 1 nozzle
Flow velocity is 3～200m/s, preferably 50～100m/s；It is preferably 65～95m/s；It is preferably 70～90m/s；Be preferably 75～
85m/s；It is preferably 80m/s.The oxygen concentration fed in first oxygen spray pipe, the second oxygen spray pipe and/or trioxid jet pipe
For 30-100%, preferably 40-100%, preferably 50-100；More preferably 90%-100%；More preferably 90-95%.Oxygen
Gas velocity is 3～200m/s；It is preferably 5-180m/s；It is preferably 10-150m/s；It is preferably 30-150m/s；It is preferably 50-
130m/s；More preferably 100-120m/s.The flow velocity of the oxygen of the first jet pipe ejection is the fuel flow rate of ejection on fuel nozzle
0.1-1.5 times；It is preferably 0.3-1 times；It is preferably 0.4-0.8 times；More preferably 0.5-0.6 times.First oxygen spray pipe conveying
Amount of oxygen account for fuel and all burn the 5%-45% of required oxygen；It is preferably 10%-40%；It is preferably 20%-35%；More excellent
Elect 30% as.The amount of oxygen of the second oxygen spray pipe conveying accounts for fuel and all burns the 0%-50% of required oxygen；It is preferably 0%-
40%；It is preferably 0%-35%；It is preferably 0%-20%；More preferably 30%.In trioxid jet pipe, the amount of oxygen of conveying accounts for
Fuel all burns the 0%-70% of required oxygen；It is preferably 0%-50%；It is preferably 0%-30%；It is preferably 0%-20%；
More preferably 40%.Fuel is selected from various gaseous fuels, fuel oil and solid fuels such as natural gas, various coal gas, oil liquefied gas.
Efficiency of combustion and burn-off rate can be effectively improved, improve flameemi ivity, reduce flame temperature, reduce NOx emission, reduce energy
Consumption and pollution, improve product quality, improves the purpose of furnace service life.
The burner of the present invention, by using the multiple spot classification of fuel and oxygen to feed, adjusts the in actual use
One, second and the oxygen allocation proportion that feeds of trioxid jet pipe 4, it is achieved stable, clear flame, fuel staging adds fire
Flame coverage rate, reduces flame peak temperature, it is ensured that the uniformity of flame；Oxygen classification, can be the strongest while stable flame
Change the high temperature analysis carbon of fuel, strengthen flame radiation performance and penetration power, improve heating quality；The classification of oxygen feeds, burning
Space fuel nozzle ports be formed about local fuel enrichment district, oxygen jet mix with the combustion tail gas of combustion space after again with
Fuel burns, the concentration of oxygen when being substantially reduced combustion reaction, thus reduces the discharge of NOx；During implementing,
The position that trioxid jet pipe 4 oxygen feeds can be adjusted；Meanwhile, adjustable first, second, and third oxygen spray pipe 4 supplies
The oxygen proportion distribution entered, it is ensured that fuel burns completely, and realizes certain coefficient of excess.Can be widely applied to glass, have
Non-ferrous metal is smelted or in other high temperature furnaces.
Being described in detail the specific embodiment of the present invention above, but it is intended only as example, the present invention does not limit
It is formed on particular embodiments described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and
Substitute the most all among scope of the invention.Therefore, the impartial conversion made without departing from the spirit and scope of the invention and
Amendment, all should contain within the scope of the invention.
Claims (10)
1. the all-oxygen combustion device of a low NOx, it is characterised in that including:
At least two or branched fuel nozzle, described fuel nozzle is arranged at horizontal level interval；
With described fuel nozzle the first oxygen spray pipe one to one, described first oxygen spray pipe diameter is more than described fuel nozzle
Diameter, the ejection of annulus that oxygen is formed between described fuel nozzle and described first oxygen spray pipe；
It is positioned at described fuel nozzle lower horizontal or two or branched second oxygen spray pipe of periphery layout, described second oxygen spray
Pipe interval is arranged；And
At least one or two trioxid jet pipes, described trioxid jet pipe is positioned at described fuel nozzle and described second oxygen
The left side of gas blowout pipe and/or right side.
The all-oxygen combustion device of low NOx the most according to claim 1, it is characterised in that the fuel spray of described fuel nozzle
Within mouth is positioned at hot working face, between described fuel nozzle ports and described hot working face, form fuel and described first oxygen spray
The oxygen of pipe is pre-mixed, tentatively lights a fire and the precombustion chamber of steady combustion, the fuel of a length of described fuel nozzle of described precombustion chamber
1 to 10 times of nozzle diameter.
The all-oxygen combustion device of low NOx the most according to claim 1, it is characterised in that described precombustion chamber is for being vertically arranged
Vertical channel in described hot working face, or it is logical to be inclined at an angle the inclination being arranged in described hot working face
Road.
The all-oxygen combustion device of low NOx the most according to claim 1, it is characterised in that described second oxygen spray pipe and institute
State that fuel nozzle central axis distance is described second oxygen spray pipe diameter 1 to 50 times.
The all-oxygen combustion device of low NOx the most according to claim 1, it is characterised in that between described second oxygen spray pipe
2-50 times that horizontal range is described second oxygen spray pipe diameter.
The all-oxygen combustion device of low NOx the most according to claim 1, it is characterised in that described trioxid jet pipe with
Spacing between the centrage of close described fuel nozzle is 10-500 times of described fuel nozzle internal diameter.
7. the combustion method of the all-oxygen combustion device of the low NOx as described in any one of claim 1-6, it is characterised in that
Including:
In described fuel nozzle, feed fuel simultaneously, spray to described first oxygen spray pipe, the second oxygen spray pipe and trioxid
Pipe feeds oxygen；
Divide by adjusting the infeed of the first oxygen spray pipe, the second oxygen spray pipe and the oxygen of trioxid jet pipe infeed and fuel
Proportioning example；Or adjust the first oxygen spray pipe, the second oxygen spray pipe and the position of trioxid jet pipe so that fuel burns completely,
Realize the discharge of fuel low NOx or ultralow NOx concentration；
Wherein, the fuel flow rate of fuel nozzle nozzle is 3～200m/s；
The oxygen concentration fed in described first oxygen spray pipe, the second oxygen spray pipe and/or trioxid jet pipe is 30-100%,
Flow velocity is 3～200m/s；
0.1-1.5 times that oxygen gas flow rate is fuel flow rate fed to the first oxygen spray pipe, amount of oxygen accounts for fuel and all burns institute
The 2%-50% of aerobic gas；
The oxygen fed in described second oxygen spray pipe accounts for fuel and all burns the 0%-60% of required oxygen；
Account for fuel with the oxygen fed in described trioxid jet pipe all to burn the 0%-80% of required oxygen.
Combustion method the most according to claim 7, it is characterised in that including:
The fuel of described fuel nozzle ejection and/or described first oxygen spray pipe, the second oxygen spray pipe, the spray of trioxid jet pipe
The oxygen gone out is the most overall to be sprayed in big low discharge cyclic fluctuation；
Or for the described fuel nozzle being symmetrically arranged and/or described first oxygen spray pipe, the second oxygen spray pipe, the 3rd oxygen
The fuel of gas blowout pipe ejection and oxygen are high flow capacity and low discharge periodically alternating spray on the right side of left side.
9. according to the combustion method described in claim 7 or 8, it is characterised in that described fuel selected from natural gas, various coal gas,
The various gaseous fuel such as oil liquefied gas, fuel oil and solid fuel.
10. the all-oxygen combustion device of the low NOx as described in any one of claim 1-6 iron and steel, chemical industry, non-ferrous metal metallurgy,
Application in glass or other high-temperature industrial furnaces.
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| CN201610711036.XA CN106090894B (en) | 2016-08-23 | 2016-08-23 | The all-oxygen combustion device and its combustion method of a kind of low NOx and application |
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| CN107131496A (en) * | 2017-04-07 | 2017-09-05 | 贵州电网有限责任公司电力科学研究院 | The Splittable burner structure and dividing method of a kind of station boiler |
| CN107804969A (en) * | 2017-09-22 | 2018-03-16 | 安徽华光光电材料科技集团有限公司 | A kind of all-oxygen combustion ultra-clear glasses and its production method |
| CN111561707A (en) * | 2020-06-03 | 2020-08-21 | 国网浙江省电力有限公司电力科学研究院 | Low-load NO of thermal power generating unitXCombustion optimization method and system |
| CN112759230A (en) * | 2020-12-31 | 2021-05-07 | 广州广钢气体能源股份有限公司 | Glass kiln and glass product production device with same |
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| CN112759230B (en) * | 2020-12-31 | 2021-11-12 | 广州广钢气体能源股份有限公司 | Glass kiln and glass product production device with same |
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