CN106090894B - The all-oxygen combustion device and its combustion method of a kind of low NOx and application - Google Patents
The all-oxygen combustion device and its combustion method of a kind of low NOx and application Download PDFInfo
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- CN106090894B CN106090894B CN201610711036.XA CN201610711036A CN106090894B CN 106090894 B CN106090894 B CN 106090894B CN 201610711036 A CN201610711036 A CN 201610711036A CN 106090894 B CN106090894 B CN 106090894B
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- oxygen spray
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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
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- 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
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- 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
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- 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
Abstract
The invention discloses the all-oxygen combustion device of low NOx a kind of and its combustion method and application, which includes: at least two or more fuel nozzles, and fuel nozzle is in horizontal position arranged for interval；With one-to-one first oxygen spray pipe of fuel nozzle, the first oxygen spray pipe diameter is greater than the diameter of fuel nozzle, and annular gap of the oxygen through being formed between fuel nozzle and the first oxygen spray pipe sprays；Two or more the second oxygen spray pipes arranged positioned at fuel nozzle lower horizontal or periphery, the second oxygen spray pipe arranged for interval；And at least one or two third oxygen spray pipes, third oxygen spray pipe are located at the left side and/or right side of fuel nozzle and the second oxygen spray pipe.All-oxygen combustion device of the invention can effectively improve efficiency of combustion and burn-off rate, improve flameemi ivity, reduce flame temperature, reduce NOx emission, and reaching reduces energy consumption and pollution, improves product quality, improves the purpose of furnace service life.
Description
Technical field
The present invention relates to a kind of all-oxygen combustion device of the High-temp. kilns such as glass, non-ferrous metal metallurgy, steel and burning sides
Combustion method and the application of the all-oxygen combustion device and its realization low NOx drainage of method more particularly to a kind of low NOx.
Background technique
There are a large amount of thermal-flame kilns, thermal-flame kilns for the industries such as glass, non-ferrous metal metallurgy, steel, boiler, petrochemical industry
For furnace due to using various fossil fuels, burning generates a large amount of pollutant.Natural gas is a kind of fuel of relative clean, with natural
Gas substitutes coal, heavy oil or other fuel, although it is other to reduce to a certain extent SO2 and heavy metal, H2S, fluoride etc.
The emission level of pollutant, but NOx emission concentration is still relatively high.NOx is the important dirt to form atmosphere pollution and haze
The major pollutants of one of dye source and environment protection control.
During high-temp combustion, the generation of NOx has the mechanism of itself.Based on NOx formation mechenism in combustion
Research, studies both at home and abroad, develops numerous low-NOx combustors, burner and combustion method.Such as patent CN201534816U
The total oxygen spray gun for disclosing a kind of natural gas that burns, is provided with the oxygen in rectangle and natural gas hybrid channel, purity oxygen channel is set
It sets in the lower section of oxygen and natural gas hybrid channel, forms Flat-flame.The invention oxygen classification is limited, flame peak temperature
It is high, it is difficult to by NOx reduction.A kind of method that patent CN102252324A discloses combusting fuel reburning low-nitrogen, is mainly answered
Used in boiler, the coal dust of conventional fineness is sent into furnace from upper layer burner using coal pulverizer and pulverized coal preparation system fired again it is de-
Nitre finally carries out after-flame using burnout degree (OFA), realizes the clean combustion method of coal-burning boiler bottom NOx.The patent realize with
Air is that oxidant multiple spot is classified infeed, but main application and boiler, it is difficult to applied to industrial furnaces such as conventional glass, smeltings
Kiln.Patent CN101381196 discloses a kind of fuel step adding apparatus of glass melter total oxygen combustion, and main fuel pipe is arranged, and
Two secondary cartridges are set at left and right sides of main fuel tank, the device can by adjusting main burner and two pair cartridges it
Between the fuel quantity that uses, to adjust length, the area coverage of flame.
It include inner and outer pipes in addition, patent CN102635856A discloses a kind of petroleum coke powder full oxygen combustor, petroleum
Coke powder is that fuel burns with oxygen mix, makes coke powder full combustion, improves coke powder utilization rate.And United States Patent (USP)
US005575637A discloses a kind of flat flame burner of suitable glass furnace, oxygen and natural gas and fires in tubaeform premix
It burns room and carries out laminar flow, mixing and burning, form the natural gas all-oxygen combustion method that flame covering surface is big, and flame becomes clear.
But above-mentioned patent flows out oxygen and natural gas with roughly the same speed, and coutroi velocity size extends so that laminar flow be presented
The incorporation time of oxygen and natural gas controls the length of flame and brightness, reduces NOx emission concentration to a certain extent, do not have
Realize the classification of oxygen and fuel, NOx concentration is difficult to further decrease.
Summary of the invention
The present invention is to solve the above problem in the prior art, proposes the total oxygen of a kind of low NOx, ultra-low NOx emission concentration
Burner and its combustion method and application, apparatus of the present invention form bright, spoke by spraying into the classification of fuel and oxygen
Penetrate that performance is high, flame broad covered area, form the burning of disperse formula in entire combustion space, significantly reduce existing all-oxygen combustion device and
NOx emission concentration improves brightness and improves Fire Radiation ability, reduce energy consumption, improve product quality, improves furnace service life.
To achieve the above object, the invention adopts the following technical scheme:
The first aspect of the invention is to provide the all-oxygen combustion device of low NOx a kind of, comprising:
At least two or more fuel nozzles, the fuel nozzle is in horizontal position arranged for interval, to form fuel staging
It feeds；
With one-to-one first oxygen spray pipe of the fuel nozzle, the first oxygen spray pipe diameter is greater than the fuel
The diameter of jet pipe, annular gap of the oxygen through being formed between the fuel nozzle and first oxygen spray pipe spray；
Two or more the second oxygen spray pipes arranged positioned at the fuel nozzle lower horizontal or periphery, second oxygen
Gas blowout pipe arranged for interval；And
At least one or two third oxygen spray pipes, the third oxygen spray pipe are located at the fuel nozzle and described
The left side and/or right side of two oxygen spray pipes.
Further, when the third oxygen spray pipe is only one, it is located at the fuel nozzle and second oxygen
The left side or right side of jet pipe, or when the third oxygen spray pipe is two, it is located at the fuel nozzle and second oxygen
The left and right sides of gas blowout pipe；In addition, the third oxygen spray pipe can be more than the two to be located at the fuel nozzle and described
The left side of second oxygen spray pipe and/or right positions.
When using the present apparatus, can with percentage of the suitable allocation oxygen between the first, second and third jet pipe, and
The flow spray regime of fuel and/or oxygen can effectively improve efficiency of combustion and burn-off rate, improve flameemi ivity, reduce fire
Flame temperature reduces NOx emission, and reaching reduces energy consumption and pollution, improves product quality, improves the purpose of furnace service life.
Further, the fuel nozzle ports of the fuel nozzle are located within hot working face, the fuel nozzle ports with it is described
The pre-burning that the oxygen of formation fuel and first oxygen spray pipe is pre-mixed, tentatively lights a fire and surely fires between hot working face
Room, the length of the precombustion chamber are 1 to 10 times, preferably 2-8 times of the fuel nozzle ports diameter of the fuel nozzle；More preferably
4-6 times.
Further, the hot working face by high-temperature-resistant burner nozzle it is brick at.
Further, the fuel nozzle, the first oxygen spray pipe, the second oxygen spray pipe and third oxygen spray pipe be laid with
In the hot working face；The fuel nozzle is located in first oxygen spray pipe.
Further, the fuel spray of the fuel nozzle, the first oxygen spray pipe, the second oxygen spray pipe and third oxygen spray pipe
Mouth is circular spout.
Further, the precombustion chamber is the vertical channel being vertically installed in the hot working face, or with certain angle
Degree is obliquely installed in the ramp way in the hot working face.Specifically, the combustion at left and right sides of burner center line
The precombustion chamber that material jet pipe and the first oxygen spray pipe and hot working face are formed can be vertical channel or the precombustion chamber is being sprayed
Certain angle is spread in two sides near exit to the left and right respectively, ejects at scalability.
Further, second oxygen spray pipe and fuel nozzle central axis distance are that second oxygen sprays
1 to 50 times of pipe diameter；It is preferred that 1 to 40 times；It is preferred that 1 to 30 times；More preferable 1 to 15 times.
Further, the horizontal distance between second oxygen spray pipe is the 2-50 of the second oxygen spray pipe diameter
Times；Preferably 3-20 times.
Further, the spacing between the third oxygen spray pipe and the center line of the immediate fuel nozzle is institute
10-500 times for stating fuel nozzle internal diameter；Preferably 20-300 times；Preferably 30-250 times；Preferably 50-200 times；Preferably
80-150 times；More preferably 100-120 times.
Further, it is equipped on the fuel nozzle, the first oxygen spray pipe, the second oxygen spray pipe and third oxygen spray pipe
Flow adjusting, distribution and/or switching device；Igniter is equipped at the fuel nozzle ports of the fuel nozzle.
The second aspect of the invention is to provide a kind of combustion method of the all-oxygen combustion device of low NOx, comprising:
Fuel, the first oxygen spray pipe of Xiang Suoshu, the second oxygen spray pipe and third oxygen are fed into the fuel nozzle simultaneously
Oxygen is fed in gas blowout pipe；
By adjusting the confession of oxygen and fuel that the first oxygen spray pipe, the second oxygen spray pipe and third oxygen spray pipe are fed
Enter allocation proportion；Or the position of the first oxygen spray pipe of adjustment, the second oxygen spray pipe and third oxygen spray pipe, so that fuel fires completely
It burns, realizes the low NOx of fuel or the discharge of ultralow NOx concentration；
Wherein, the fuel flow rate of fuel nozzle nozzle is 3~200m/s；
The oxygen concentration fed in first oxygen spray pipe, the second oxygen spray pipe and/or third oxygen spray pipe is 30-
100%, flow velocity is 3~200m/s；
The oxygen gas flow rate fed to the first oxygen spray pipe is 0.1-1.5 times of fuel flow rate, and amount of oxygen accounts for fuel and all fires
The 2%-50% of oxygen needed for burning；
The oxygen fed into second oxygen spray pipe accounts for the 0%-60% of oxygen needed for fuel all burns；
The 0%-80% of oxygen needed for fuel all burns is accounted for the oxygen fed into the third oxygen spray pipe.
Further, the combustion method, comprising:
The fuel, and/or the first oxygen spray pipe of the fuel nozzle ejection, the second oxygen spray pipe, the spray of third oxygen spray pipe
Oxygen out is respectively individually whole in big --- low discharge cyclic fluctuation injection；
Or the fuel nozzle and/or first oxygen spray pipe, the second oxygen spray pipe, third oxygen for left and right arrangement
The fuel and oxygen that gas blowout pipe sprays are in left side --- right side high flow capacity and low discharge periodicity alternating spray.
Further, the oxygen fed in first oxygen spray pipe, the second oxygen spray pipe and/or third oxygen spray pipe is dense
Degree is 30-100%, and flow velocity is 3~200m/s.
Further, the flow velocity of the fuel is 50~100m/s；Preferably 65~95m/s；Preferably 70~90m/s；
Preferably 75~85m/s；Preferably 80m/s.
The oxygen concentration fed in first oxygen spray pipe, the second oxygen spray pipe and third oxygen spray 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 for the oxygen that first jet pipe sprays is the fuel flow rate sprayed on the fuel nozzle
0.1-1.5 times；Preferably 0.3-1 times；Preferably 0.4-0.8 times；More preferably 0.5-0.6 times.
Further, the amount of oxygen of the first oxygen spray pipe conveying accounts for the 5%- of oxygen needed for fuel all burns
45%；Preferably 10%-40%；Preferably 20%-35%；More preferably 30%.
Further, the amount of oxygen of the second oxygen spray pipe conveying accounts for the 0%- of oxygen needed for fuel all burns
50%；Preferably 0%-40%；Preferably 0%-35%；Preferably 0%-20%；More preferably 30%.
Further, the amount of oxygen conveyed in the third oxygen spray pipe accounts for the 0%- of oxygen needed for fuel all burns
70%；Preferably 0%-50%；Preferably 0%-30%；Preferably 0%-20%；More preferably 40%.
Further, the fuel be 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 low NOx a kind of in steel, chemical industry, non-ferrous metal smelting
Application in refining, glass or other high-temperature industrial furnaces.
The present invention by adopting the above technical scheme, compared with prior art, has the following technical effect that
Burner of the present invention is classified using the multiple spot of fuel and oxygen and is fed, and adjusts each oxygen spray pipe in actual use
The allocation proportion for feeding oxygen realizes that stable, clear flame, fuel staging increase flame covering surface, reduces flame peak value
Temperature guarantees the uniformity of flame；For oxygen classification while stablizing flame, the high temperature of enhanced fuel analyses carbon, enhances flame
Radiance and penetration power improve heating quality；The classification of oxygen is fed, and combustion space fuel nozzle ports are formed about local combustion
Expect to burn with fuel again after enrichment region, oxygen jet are mixed with the combustion tail gas of combustion space, it is anti-to substantially reduce burning
The concentration of seasonable oxygen, to reduce the discharge of NOx；Efficiency of combustion and burn-off rate can be improved in the present invention, reduces energy consumption and dirt
Dye improves product quality, improves furnace service life.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the all-oxygen combustion device of low NOx of the present invention；
Fig. 2 is the section of fuel nozzle and the first oxygen spray pipe signal in a kind of all-oxygen combustion device of low NOx of the present invention
Figure；
Fig. 3 is arrangement signal of the fuel nozzle in hot working face in a kind of all-oxygen combustion device of low NOx of the present invention
Figure；
Fig. 4 is a kind of flame structure schematic diagram of all-oxygen combustion device of low NOx of the present invention when in use；
Fig. 5 is fuel, and/or the first oxygen spray pipe, the spray of the second oxygen in a kind of all-oxygen combustion device of low NOx of the present invention
The oxygen that pipe, third oxygen spray pipe the spray whole wave that respectively both independent and/or any combination carries out, which sprays, to be illustrated
Figure；
Fig. 6 is in a kind of all-oxygen combustion device of low NOx of the present invention when the fuel and/or the first oxygen, the second oxygen
When gas, third oxygen spray pipe are arranged symmetrically, the fuel and/or the first oxygen spray pipe, the second oxygen spray pipe, third oxygen spray pipe
Respectively both independent and/or any combination is in left side to the oxygen of injection --- and right side high flow capacity periodically replaces with low discharge
Spray schematic diagram；
Fig. 7 is in a kind of all-oxygen combustion device of low NOx of the present invention when the fuel and/or the first oxygen, the second oxygen
When gas, third oxygen spray pipe are arranged symmetrically, the fuel and/or the first oxygen spray pipe, the second oxygen spray pipe, third oxygen spray pipe
Respectively both independent and/or any combination left and right sides carries out high flow capacity to the oxygen of injection --- low discharge alternating spray
When 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, the first oxygen spray pipe of 2-,
The first oxygen intake of 21-, the first oxygen channel of 22-, 3- the second oxygen spray pipe the second oxygen intake of 31-, the spray of the second oxygen of 32-
Mouthful, 4- third oxygen spray pipe, the hot working face 5-, 6- precombustion chamber, 7- combustion flame.
Specific embodiment
The present invention is described in more detail below by specific embodiment, for a better understanding of the present invention,
But following embodiments are not intended to limit the scope of the invention.
As shown in Figure 1, providing the all-oxygen combustion device of low NOx a kind of the embodiment of the invention provides a kind of, comprising: at least
Two or more fuel nozzles 1, fuel nozzle 1 is in horizontal position arranged for interval, to form fuel staging infeed, fuel nozzle 1
The arranged for interval on the same horizontal plane, to form bigger covering surface in the horizontal plane, combustion flame broad covered area, heating is more
Uniformly, heating quality is high；With one-to-one first oxygen spray pipe 2 of fuel nozzle 1,2 diameter of the first oxygen spray pipe is greater than fuel
The diameter of jet pipe 1, annular gap of the oxygen through being formed between fuel nozzle 1 and the first oxygen spray pipe 2 spray into；Positioned at fuel nozzle
1 lower section or periphery horizontally disposed two or more the second oxygen spray pipes 3,3 horizontal interval of the second oxygen spray pipe arrangement；And extremely
Few one or two third oxygen spray pipes 4, third oxygen spray pipe 4 are located at the left side of fuel nozzle 1 and the second oxygen spray pipe 3
The right side and/or.When third oxygen spray pipe 4 is only one, positioned at the left side or the right side of fuel nozzle 1 and the second oxygen spray pipe 3
Side, or when third oxygen spray pipe 4 is two, positioned at the left and right sides of fuel nozzle 1 and the second oxygen spray pipe 3；In addition, third
Oxygen spray pipe 4 can also be the two or more according to needs of production, be located at fuel nozzle 1 and the second oxygen spray pipe 3
Left side and/or right positions.
As shown in Fig. 2, in the burner fuel nozzle 1 fuel nozzle ports 11 be located at by high-temperature-resistant burner nozzle it is brick at
Fuel is formed within hot working face 5, between fuel nozzle ports 13 and hot working face 5 and through the first oxygen intake 21 and the first oxygen
The precombustion chamber 6 that the oxygen that gas channel 22 sprays into is pre-mixed, tentatively lights a fire and surely fires improves fuel temperature, promotes fuel-pyrolysis
With analysis carbon.The length (retraction distance) of the precombustion chamber 6 is 1 to 10 times of 11 diameter of fuel nozzle ports of fuel nozzle 1, preferably 2-
8 times；More preferably 4-6 times.The fuel channel 12 and fuel nozzle ports 13 of fuel nozzle 1 are contracted within hot working face 5, a side
Face the effective protection high temperature erosion of metal fuel spout and the chemical erosion of furnace inner exhaust gas, extend the service life of jet pipe；
In addition, fuel nozzle 1 is contracted within the resistance to material of high temperature, the oxygen that can be fed with the first oxygen spray pipe 2 is pre-mixed, and makes part
Fuel advanced combustion in resistance to material keeps combustion flame 7 to stablize, while partially combusted fuel improves the temperature of fuel mixture
Degree, makes fuel carry out analysis carbon at high temperature, volatilizes carbon black particle, the brightness of the combustion flame 7 of raising and radiance.It is highlighted
Degree flame improves the penetration performance of combustion flame 7, reduces flame peak temperature, helps to improve heating properties, reduces NOx
Concentration of emission.
As shown in 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 set in hot working face, as shown in Fig. 3-b.Specifically, it is located at burner
Fuel nozzle 1 and the first oxygen spray pipe 1 at left and right sides of center line can be vertical with the precombustion chamber 6 that hot working face 5 is formed
The certain angle of two sides diffusion to the left and right is ejected at scalability respectively near ejiction opening for channel or precombustion chamber, such as pre-burning
Vertical line of the room in ejiction opening and hot working face is in 0-60 ° of angle, as shown in Fig. 3-b.
For the infeed rate for accurately controlling to adjust fuel and oxygen, the combustion rate of fuel is improved, in fuel nozzle 1, first
Flow adjusting, distribution and/or switching device are equipped on oxygen spray pipe 2, the second oxygen spray pipe 3 and third oxygen spray pipe 4；And
Igniter is equipped at the fuel nozzle ports 11 of fuel nozzle 1.In addition, with one-to-one first oxygen spray pipe 2 of fuel nozzle 1
Oxygen intake is interconnected, and forms the same oxygen intake, to simplify design.Fuel nozzle 1, the first oxygen spray pipe 2, the second oxygen
The fuel nozzle ports of gas blowout pipe 3 and third oxygen spray pipe 4 are circular spout；Fuel nozzle 1, the first oxygen spray pipe 2, the spray of the second oxygen
The diameter of pipe 3 and third oxygen spray pipe 4 is 0.5-5mm；Preferably 0.7-3mm；More preferably 1-1.5mm.Second oxygen spray pipe 3
It is 1 to 50 times of 3 diameter of the second oxygen spray pipe with 1 central axis of fuel nozzle distance；It is preferred that 1 to 40 times；It is preferred that 1 to 30
Times；It more preferable 1 to 15 times, mixes oxygen and fuel first with the tail gas of burning in entire kiln combustion space, reduces combustion
Oxygen concentration and fuel concentration when material burning, substantially reduce 7 temperature of combustion flame and NOx emission concentration.Moreover, the second oxygen
Jet pipe 3 is arranged in the lower section of fuel nozzle 1, so that the integral combustion section of entire burner and high-temperature region is moved down, more leans on
The material closely heated, the arch top far from high temperature kiln, improves heating efficiency, while protecting arch top in this way, extends the kiln longevity
Life.Horizontal distance between second oxygen spray pipe 3 is 2-50 times of 3 diameter of the second oxygen spray pipe；Preferably 3-20 times；More preferably
It is 8-15 times, is more preferably 10-12 times.
Wherein, the horizontal space between third oxygen spray pipe 4 and the center line of immediate fuel nozzle 1 is fuel nozzle
10-500 times of 1 internal diameter；Preferably 20-300 times；Preferably 30-250 times；Preferably 50-200 times；Preferably 80-150 times；
It more preferably 100-120 times, mixes oxygen and fuel first with the tail gas of burning in entire kiln combustion space, reduces combustion
Expect the oxygen concentration and fuel concentration when burning, then form the disperse formula burning of no obvious flame in entire kiln space,
Further reduce the temperature and NOx emission concentration of combustion flame 7.For convenience of specific implementation, oxygen spout can be arranged three times
Implementation result on independent refractory brick or furnace structure, without influencing this patent.
The embodiment of the invention also provides a kind of combustion methods of the all-oxygen combustion device of low NOx, comprising:
Fuel is fed into fuel nozzle 1 simultaneously, to the first oxygen spray pipe 2, the second oxygen spray pipe 3 and third oxygen spray pipe
Oxygen is fed in 4；
The oxygen and fuel fed by adjusting the first oxygen spray pipe 2, the second oxygen spray pipe 3 and third oxygen spray pipe 4
Infeed allocation proportion；Or the position of the first oxygen spray pipe 2 of adjustment, the second oxygen spray pipe 3 and third oxygen spray pipe 4, so that combustion
Expect completely burned, realizes the low NOx of fuel or the discharge of ultralow NOx concentration, the burning of the all-oxygen combustion device of the low NOx when in use
7 structure flame effect of flame, as shown in Figure 4；
As a preferred embodiment of the invention, which includes:
The fuel, and/or the first oxygen spray pipe 2, the second oxygen spray pipe 3, third oxygen spray pipe 4 that fuel nozzle spray 1 is gone out
The oxygen of ejection is respectively individually whole in big --- low discharge cyclic fluctuation injection；It is specific as shown in figure 5, fuel, and/or
The oxygen that first oxygen spray pipe, the second oxygen spray pipe, third oxygen spray pipe spray respectively both independent and/or any combination
The whole wave of progress sprays.
Or the fuel nozzle of left and right arrangement and/or the first oxygen spray pipe, the second oxygen spray pipe, third oxygen spray pipe are sprayed
Fuel and oxygen out is in left side --- right side high flow capacity and low discharge periodicity alternating spray.It is specific to be fired as shown in fig. 6, working as
When material and/or the first oxygen, the second oxygen, third oxygen spray pipe are arranged symmetrically, fuel and/or the first oxygen spray pipe, the second oxygen
Respectively both independent and/or any combination is in left side --- right side height stream to the oxygen that gas blowout pipe, third oxygen spray pipe spray
Amount and low discharge periodicity alternating spray.
Or work as fuel and/or when the first oxygen, the second oxygen, third oxygen spray pipe are arranged symmetrically, fuel and/or first
The oxygen that oxygen spray pipe, the second oxygen spray pipe, third oxygen spray pipe spray respectively both independent and/or any combination or so
High flow capacity --- a kind of limiting case of low discharge alternating spray, low discharge are thoroughly closed, as shown in Figure 7 for two sides progress.
Wherein, when using the burner, oxygen can suitably be distributed between the first, second and third oxygen spray pipe
The percentage and fuel of injection and/or the injection flow or spray regime of oxygen, such as: the fuel of 1 nozzle of fuel nozzle
Flow velocity is 3~200m/s, preferably 50~100m/s；Preferably 65~95m/s；Preferably 70~90m/s；Preferably 75~
85m/s；Preferably 80m/s.The oxygen concentration fed in first oxygen spray pipe, the second oxygen spray pipe and/or third oxygen spray 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；Preferably 5-180m/s；Preferably 10-150m/s；Preferably 30-150m/s；Preferably 50-
130m/s；More preferably 100-120m/s.The flow velocity for the oxygen that first jet pipe sprays is the fuel flow rate sprayed on fuel nozzle
0.1-1.5 times；Preferably 0.3-1 times；Preferably 0.4-0.8 times；More preferably 0.5-0.6 times.The conveying of first oxygen spray pipe
Amount of oxygen account for fuel all burn needed for oxygen 5%-45%；Preferably 10%-40%；Preferably 20%-35%；It is more excellent
It is selected as 30%.The amount of oxygen of second oxygen spray pipe conveying accounts for the 0%-50% of oxygen needed for fuel all burns；Preferably 0%-
40%；Preferably 0%-35%；Preferably 0%-20%；More preferably 30%.The amount of oxygen conveyed in third oxygen spray pipe accounts for
The 0%-70% of oxygen needed for fuel all burns；Preferably 0%-50%；Preferably 0%-30%；Preferably 0%-20%；
More preferably 40%.Fuel is selected from various gaseous fuels, fuel oil and the solid fuels such as natural gas, various coal gas, oil liquefied gas.
Efficiency of combustion and burn-off rate can be effectively improved, flameemi ivity is improved, reduces flame temperature, reduce NOx emission, reach reduction energy
Consumption and pollution, improve product quality, improve the purpose of furnace service life.
Burner of the invention is classified by using the multiple spot of fuel and oxygen and feeds, and adjusts the in actual use
One, second and third oxygen spray pipe 4 feed oxygen allocation proportion, realize that stable, clear flame, fuel staging increase fire
Flame covering surface reduces flame peak temperature, guarantees the uniformity of flame；Oxygen classification, can be effectively strong while stablizing flame
The high temperature for changing fuel analyses carbon, enhances flame radiation performance and penetration power, improves heating quality；The classification of oxygen is fed, burning
Space fuel nozzle ports are formed about local fuel enrichment area, oxygen jet mixed with the combustion tail gas of combustion space after again with
Fuel burns, the concentration of oxygen when substantially reducing combustion reaction, to reduce the discharge of NOx；During specific implementation,
The position that can be fed to 4 oxygen of third oxygen spray pipe is adjusted；Meanwhile adjustable first, second, and third oxygen spray pipe 4 supplies
The oxygen proportion distribution entered, guarantees fuel completely burned, and realize certain coefficient of excess.It can be widely applied to glass, have
In non-ferrous metal smelting or other high temperature furnaces.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and
Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and
Modification, all should be contained within the scope of the invention.
Claims (9)
1. a kind of all-oxygen combustion device of low NOx characterized by comprising
At least two fuel nozzles, the fuel nozzle is in horizontal position arranged for interval；
With one-to-one first oxygen spray pipe of the fuel nozzle, the first oxygen spray pipe diameter is greater than the fuel nozzle
Diameter, annular gap of the oxygen through being formed between the fuel nozzle and first oxygen spray pipe spray, first oxygen
Gas blowout pipe is to open up and the vertical channel in hot working face；
Positioned at more the second oxygen spray pipes of the fuel nozzle lower horizontal, the second oxygen spray pipe arranged for interval；And
An at least third oxygen spray pipe, the third oxygen spray pipe are located at the left side of the fuel nozzle and second oxygen spray pipe
The right side and/or；
Horizontal distance between second oxygen spray pipe is 2-50 times of the second oxygen spray pipe diameter；
Spacing between the third oxygen spray pipe and the center line of the immediate fuel nozzle is in the fuel nozzle
100-500 times of diameter；
The fuel flow rate of fuel nozzle nozzle is 3~200m/s；
The oxygen concentration fed in first oxygen spray pipe, the second oxygen spray pipe and/or third oxygen spray pipe is 30-100%,
Flow velocity is 3~200m/s.
2. the all-oxygen combustion device of low NOx according to claim 1, which is characterized in that the third oxygen spray pipe is two
Branch.
3. the all-oxygen combustion device of low NOx according to claim 1, which is characterized in that the fuel of the fuel nozzle sprays
Mouth is located within hot working face, forms fuel between the fuel nozzle ports and the hot working face and first oxygen sprays
The precombustion chamber that the oxygen of pipe is pre-mixed, tentatively lights a fire and surely fires, the length of the precombustion chamber are the fuel of the fuel nozzle
1 to 10 times of nozzle diameter.
4. the all-oxygen combustion device of low NOx according to claim 3, which is characterized in that the precombustion chamber is to be vertically arranged
Vertical channel in the hot working face, or be inclined at an angle the inclination being set in the hot working face and lead to
Road.
5. the all-oxygen combustion device of low NOx according to claim 1, which is characterized in that second oxygen spray pipe and institute
State 1 to 50 times that fuel nozzle central axis distance is the second oxygen spray pipe diameter.
6. a kind of combustion method of the all-oxygen combustion device of low NOx as described in any one in claim 1-5, which is characterized in that
Include: while feeding fuel, the first oxygen spray pipe of Xiang Suoshu, the second oxygen spray pipe and the spray of third oxygen into the fuel nozzle
Oxygen is fed in pipe；
The infeed point of the oxygen and fuel that are fed by adjusting the first oxygen spray pipe, the second oxygen spray pipe and third oxygen spray pipe
With ratio；Or the position of the first oxygen spray pipe of adjustment, the second oxygen spray pipe and third oxygen spray pipe, so that fuel completely burned,
Realize the low NOx of fuel or the discharge of ultralow NOx concentration；
Wherein, amount of oxygen accounts for the 2%-50% of oxygen needed for fuel all burns；
The oxygen fed into second oxygen spray pipe accounts for the 0%-60% of oxygen needed for fuel all burns；
The 0%-80% of oxygen needed for fuel all burns is accounted for the oxygen fed into the third oxygen spray pipe.
7. combustion method according to claim 6 characterized by comprising
The fuel, and/or first oxygen spray pipe of the fuel nozzle ejection, the second oxygen spray pipe, the spray of third oxygen spray pipe
Oxygen out is respectively individually whole in big --- low discharge cyclic fluctuation injection；
Or for the fuel nozzle symmetrically arranged on the left and the right and/or first oxygen spray pipe, the second oxygen spray pipe, third oxygen
The fuel and oxygen that gas blowout pipe sprays are in left side --- right side high flow capacity and low discharge periodicity alternating spray.
8. combustion method according to claim 6 or 7, which is characterized in that the fuel be selected from natural gas, various coal gas,
Oil liquefied gas, fuel oil and solid fuel.
9. the all-oxygen combustion device of low NOx as described in any one in claim 1-5 is in steel, chemical industry, non-ferrous metal metallurgy, glass
Application in glass or other high-temperature industrial furnaces.
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| CN107131496B (en) * | 2017-04-07 | 2023-10-27 | 贵州电网有限责任公司电力科学研究院 | Split type burner structure and split method of power 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 |
| CN111561707B (en) * | 2020-06-03 | 2022-05-27 | 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 |
| 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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| CN1121156A (en) * | 1994-06-13 | 1996-04-24 | 普拉塞尔技术有限公司 | Staged combustion for reducing nitrogen oxides |
| CN1894541A (en) * | 2003-12-16 | 2007-01-10 | 液体空气乔治洛德方法利用和研究的具有监督和管理委员会的有限公司 | Staged combustion method with optimised injection of primary oxidant |
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