CN108266727A - The ultralow NO of cycle in a kind of flue gasxDischarge gas burner - Google Patents
The ultralow NO of cycle in a kind of flue gasxDischarge gas burner Download PDFInfo
- Publication number
- CN108266727A CN108266727A CN201810144837.1A CN201810144837A CN108266727A CN 108266727 A CN108266727 A CN 108266727A CN 201810144837 A CN201810144837 A CN 201810144837A CN 108266727 A CN108266727 A CN 108266727A
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- CN
- China
- Prior art keywords
- gas
- flue gas
- combustion
- brazier brick
- ultralow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011449 brick Substances 0.000 claims abstract description 81
- 239000003546 flue gas Substances 0.000 claims abstract description 61
- 239000007789 gas Substances 0.000 claims abstract description 59
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000002485 combustion reaction Methods 0.000 claims abstract description 33
- 239000007921 spray Substances 0.000 claims abstract description 33
- 239000000567 combustion gas Substances 0.000 claims abstract description 27
- 239000003517 fume Substances 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 abstract description 28
- 238000005516 engineering process Methods 0.000 abstract description 12
- 238000002347 injection Methods 0.000 abstract description 12
- 239000007924 injection Substances 0.000 abstract description 12
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100001143 noxa Toxicity 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/00014—Pilot burners specially adapted for ignition of main burners in furnaces or gas turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14003—Special features of gas burners with more than one nozzle
Abstract
The invention discloses recycle ultralow NO in a kind of flue gasxDischarge gas burner, including burner brazier brick, several gas guns are provided on the inside of brazier brick, the top of the nozzle of gas gun is equipped with the first spray orifice, brazier brick inner wall is sprayed to by the fuel of the first spray orifice, the side of the nozzle of gas gun is equipped with the second spray orifice, brazier brick side wall is equipped with and the matched through-hole of the second spray orifice, brazier brick lateral wall is equipped with combustion gas guide housing, brazier brick center is equipped with flue gas ejection system, flue gas ejection system includes the fume pipe for intersecting connection, flue gas tube hub is equipped with inner nozzle, inner nozzle upper end is connected with Venturi tube, inner nozzle lower end and secondary combustion-supporting air communication, primary air leads in brazier brick.Combustion gas recirculation volume in the stove of primary Proportionality design, flexible adjusting control, secondary combustion-supporting air and its injection is classified by rational fuel gas, realizes a variety of low NOxThe combination application of combustion technology, so as to reach ultralow NOxThe purpose of discharge.
Description
Technical field
The present invention relates to technical field of burner, it particularly relates to the ultralow NO of cycle in a kind of flue gasxDischarge combustion gas combustion
Burner.
Background technology
With the raising of environmental requirement, in order to reach the requirement of national environmental standard, in petrochemical heating furnace and boiler
With burner apparatus, in order to reduce NO in flue gasxConcentration uses low NOxCombustion technology, including fuel-staged combustion, deep or light combustion
It burns, fuel fires again, flue gas recirculation etc..Flue gas recirculation combustion technology therein is that chimney smoke is passed through exterior tube pass
Either blending is in combustion air in a part to burner hearth or blending is in fuel gas, and participating in burning by burner enters
Burner hearth, this smoke backflow recycle burning technology mainly reduce flame temperature using flue gas so that combustion flame temperature drops
It is low, inhibit thermal NOxA large amount of generation, reaches low NOxDischarge purpose.Since flue gas recycle burning technology needs outside existing stove
Gas bypass pipeline to be established, needs to increase the equipment such as high-temperature flue gas air-introduced machine, regulating valve, controller, investment improvement cost is big,
It is mainly used in the low NO of boilerxIn transformation；And using external flue gas recirculation reburning technology there are several shortcomings, first, external
Flue gas, which introduces burner hearth, causes fire box temperature to reduce；Second, flue gas flow rate increases in burner hearth, change between burner hearth and heating surface
Heat distribution generates boiler efficiency certain influence；In addition, with the increase of amount of circulating gas, burning will become unstable.
By site planning and security restriction, at present temporarily without application on petroleum chemical heating furnace.
The existing discharge standard of country《Petroleum refining industry pollutant emission standard》（GB 31570-2015）Regulation：It is a kind of
Regional NOxEmission request is less than 100mg/m3.The supplier of the domestic current high levels of petroleum chemical heating furnace burner can accomplish about
60 mg/m3Discharge still, does not recycle low NO using smoke backflowxCombustion technology.According to domestic and international data, work as flue gas
When recirculation volume reaches 10%, NOxDischarge reduces by 65%, therefore, the low NO of flue gas recirculation is used on petroleum chemical heating furnacexBurning skill
Art further reduces NOxDischarge has certain space and market, significant in environmental protection cause.
For the problems in the relevant technologies, currently no effective solution has been proposed.
Invention content
For the above-mentioned technical problem in the relevant technologies, the present invention proposes the ultralow NO of cycle in a kind of flue gasxDischarge combustion gas
Burner can solve above-mentioned technical problem.
To realize the above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
The ultralow NO of cycle in a kind of flue gasxGas burner is discharged, including burner brazier brick, is provided on the inside of the brazier brick
Several gas guns, the top of the nozzle of the gas gun are equipped with the first spray orifice, fire pot are sprayed to by the fuel of first spray orifice
Brick inner wall, the side of the nozzle of the gas gun are equipped with the second spray orifice, and the brazier brick side wall is equipped with and the second spray orifice phase
The through-hole of cooperation, the brazier brick lateral wall are equipped with combustion gas guide housing, the brazier brick lateral wall and the combustion gas guide housing it
Between form annular gap, spray to annular gap by the fuel of second spray orifice；The brazier brick center is equipped with flue gas injection
System, the flue gas ejection system include the fume pipe for intersecting connection, and the flue gas tube hub is equipped with inner nozzle, the interior spray
Pipe upper end is connected with Venturi tube, and the inner nozzle is interconnected with the fume pipe, the external port and fire pot of the fume pipe
It is connected on the inside of brick, the inner nozzle lower end and secondary combustion-supporting air communication, primary air lead in brazier brick.
Further, the gas gun totally 4 and is uniformly distributed and is set on the inside of the brazier brick.
Further, circle is connected by side arc plate between the fume pipe.
Further, the primary air is connect by primary air pipeline with primary air butterfly valve,
The secondary combustion-supporting air is connect by secondary combustion-supporting air pipeline with secondary combustion-supporting air butterfly valve.
Further, altar lamp is equipped in the brazier brick, the altar lamp is connected with altar lamp gas pipeline.
Further, it is connected between the altar lamp and altar lamp gas pipeline by hose, the hose and the length
Fire hole is equipped between bright lamp.
Further, cylinder is connected on the downside of the brazier brick, the cylinder inboard wall is provided with insulating layer, the insulating layer
Inside is provided with liner protection steel wire.
Further, the gas gun is connect by flange and bolt with cylinder.
Further, the input end of the gas gun is connect with annular drum pipe.
Further, the brazier brick is frustum cone structure.
Beneficial effects of the present invention：Combustion gas is divided into 2 grades by nozzle, passes through primary air and secondary combustion-supporting air
Combustion air is divided into 2 grades by butterfly valve etc., then, is flowed back again using Venturi tube injection inner flue gas of the stove further through secondary combustion-supporting air
Circulating combustion, and primary Proportionality design, flexible adjusting control, secondary combustion-supporting air are classified by rational fuel gas and its drawn
Combustion gas recirculation volume in the stove penetrated realizes a variety of low NOxThe combination application of combustion technology, so as to reach ultralow NOxThe mesh of discharge
's.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the ultralow NO of cycle in a kind of flue gas described according to embodiments of the present inventionxDischarge the section view of gas burner
Figure；
Fig. 2 is the ultralow NO of cycle in a kind of flue gas described according to embodiments of the present inventionxDischarge the vertical view of gas burner；
Fig. 3 is the ultralow NO of cycle in a kind of flue gas described according to embodiments of the present inventionxDischarge the combustion air of gas burner
Entrance schematic diagram；
Fig. 4 is the ultralow NO of cycle in a kind of flue gas described according to embodiments of the present inventionxDischarge the flue gas injection of gas burner
The structure diagram of system；
Fig. 5 is the ultralow NO of cycle in a kind of flue gas described according to embodiments of the present inventionxDischarge the brazier brick of gas burner
Three-dimensional cutaway view.
In figure：1. brazier brick；2. gas gun；3. combustion gas guide housing；4. flue gas ejection system；5. fume pipe；6. inner nozzle；
7. Venturi tube；8. side arc plate；9. primary air butterfly valve；10. secondary combustion-supporting air butterfly valve；11. altar lamp；It is 12. soft
Pipe；13. fire hole；14 cylinders；15. peephole；16. main gas hose；17. secondary combustion-supporting air intake；18. it once helps
Fire air intake；19. main fuel gas inlet；20. altar lamp fuel gas inlet；21. injection smoke inlet in stove.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's all other embodiments obtained belong to what the present invention protected
Range.
As shown in Figs. 1-5, the ultralow NO of cycle in a kind of flue gas according to embodiments of the present inventionxDischarge fuel gas buring
Device, including burner brazier brick 1,1 inside of brazier brick is provided with several gas guns 2, the top of the nozzle of the gas gun 2
Equipped with the first spray orifice, 1 inner wall of brazier brick is sprayed to by the fuel of first spray orifice, the side of the nozzle of the gas gun 2 is set
There is the second spray orifice, 1 side wall of brazier brick is equipped with to be set with the matched through-hole of the second spray orifice, 1 lateral wall of brazier brick
There is combustion gas guide housing 3, annular gap is formed between 1 lateral wall of brazier brick and the combustion gas guide housing 3, by described second
The fuel of spray orifice sprays to annular gap；1 center of brazier brick is equipped with flue gas ejection system 4, and the flue gas ejection system 4 includes
Intersect the fume pipe 5 of connection, 5 center of fume pipe is equipped with inner nozzle 6, and 6 upper end of inner nozzle is connected with Venturi tube
7, the inner nozzle 6 is interconnected with the fume pipe 5, and the external port of the fume pipe 5 is connected with 1 inside of brazier brick, described
6 lower end of inner nozzle and secondary combustion-supporting air communication, primary air lead in brazier brick 1.
The gas gun 2 totally 4 and is uniformly distributed and is set to 1 inside of the brazier brick.
Circle is connected by side arc plate 8 between the fume pipe 5.
The primary air is connect by primary air pipeline with primary air butterfly valve 9, described secondary
Combustion air is connect by secondary combustion-supporting air pipeline with secondary combustion-supporting air butterfly valve 10.
Altar lamp 11 is equipped in the brazier brick 1, the altar lamp 11 is connected with altar lamp gas pipeline.
It is connected between the altar lamp 11 and altar lamp gas pipeline by hose 12, the hose 12 and the altar lamp
Fire hole 13 is equipped between 11.
1 downside of brazier brick is connected with cylinder 14, and 14 inner wall of cylinder is provided with insulating layer, the insulating layer inside
It is provided with liner protection steel wire.
The gas gun 2 is connect by flange and bolt with cylinder 14.
The input end of the gas gun 2 is connect with annular drum pipe.
The brazier brick 1 is frustum cone structure.
In order to facilitate understand the present invention above-mentioned technical proposal, below by way of in specifically used mode to the present invention it is above-mentioned
Technical solution is described in detail.
Burner cylinder 14 is by the steel plate flange that is welded in installation bolt and cylinder, mounted on petroleum chemical heating furnace or boiler
Drop-bottom or sidewall paneling on, the burner hearth suitable for reading for stretching into brazier brick 1 of burner cylinder 14.Cylinder 14 is the installation of all components
Body, cylinder 14 are hollow cylindrical structure, are rolled by steel plate, and inner wall is provided with heat insulation layer and liner protection steel wire；Cylinder
14 intermediate channel of body is primary air channel, and bottom end face is closed by steel plate and insulating layer, is provided with thereon for gas gun
2nd, altar lamp 11, fire hole 13, the installation of peephole 15 fixed through-hole and joint face；14 bottom sidewall trepanning of cylinder and with two
Secondary combustion air butterfly valve 10, primary air butterfly valve 9 shell ring square tubes soldering be integrated.
Flue gas ejection system 4 is welded as a whole by lower supporting plate and 14 upper end of cylinder, and passes through inner nozzle 6 and two
The air hose welding connection of secondary combustion air butterfly valve 10, forms secondary combustion-supporting air duct.The shape of upper backup pad and lower supporting plate
Equally, it is ring flat-plate, one, middle section and 7 bottom of Venturi tube of fume pipe 5 is formed by side arc plate 8 and the welding of fume pipe 5
Portion's Taper Pipe is welded and fixed and connects, and forms inner flue gas of the stove injection return flow line；Inner nozzle 6 by the gradually necking of straight tube and two sections cone
Pipe forms, and jet pipe top is inserted into the middle section of fume pipe 5 and is welded and fixed therewith, and 6 head of inner nozzle reaches 7 bottom of Venturi tube
In portion's Taper Pipe pipe, the lower part straight tube port of inner nozzle 6 is connected with the welding of the air hose of secondary combustion-supporting air butterfly valve 10, forms secondary help
Fire air duct.
Combustion gas guide housing 3 is welded to form by straight tube and canalis spinalis, and the upper backup pad for passing through straight tube and flue gas ejection system 4 welds
One is connected in, the welding of straight tube inner wall is evenly equipped with band steel, and the brazier brick 1 for being assembled in it, which limits, to be used.Combustion gas guide housing 3 and fire pot
The annular gap formed between brick 1 be the rectification of secondary fuel gas and guide channel, nozzle by brazier brick secondary fuel pneumatic transmission come
Combustion gas speed it is higher, by after the annular gap step-down rectifier that is formed between combustion gas guide housing 3 and brazier brick 1, along fire
At basin brick male cone (strobilus masculinus) spray feed to brazier brick mouth.
Brazier brick 1 is mounted on the upper backup pad of flue gas ejection system 4, and by 3 restriction site of combustion gas guide housing, ensures it
It is concentric with burner centre.Brazier brick 1 be hollow circle tube structure, be made of refractory material, inner wall by bottom straight pipe, in
Between undergauge cone section and upper outlet straight pipe composition；Its outer wall is made of bottom straight pipe and top undergauge cone section；Under brazier brick 1
Portion's straight pipe side wall is uniformly distributed with the through-hole with 2 quantity of gas gun as many along the circumference, is secondary fuel gas channel, for the ease of two
Ejection of the grade fuel gas on 3 top of combustion gas guide housing evenly, secondary fuel vent hole is corresponded on 1 outer wall straight tube of brazier brick
Position is provided with annular groove, and section is semicircle.
Gas gun 2 is made of gun barrel, nozzle and annular drum pipe etc., centered on burner body centre by circumference not
In brazier brick 1, nozzle is mounted on gun barrel, and gun barrel is welded on annular drum pipe, and during installation, gun barrel passes through cylinder body bottom end
The preformed hole of plate, stretch into cylinder until reach brazier brick 1 at 1 inner wall of brazier brick, then by the flanged plate on gun barrel with
The corresponding flange face of 14 bottom end plate of cylinder is fixed with bolt；Nozzle is fixed by pipe screw thread or welding manner with gun barrel, nozzle
Primary fuel gas spurt is provided on the spherical of head, straight pipe side is provided with secondary fuel gas spurt, position pair in the middle part of nozzle
Answer the position of secondary fuel vent hole on brazier brick.
Altar lamp 11 is mounted on 14 bottom preset mounting hole of burner cylinder, gos deep into burner internal, and head reaches
1 centre position of brazier brick, for lighting primary fuel gas.The fuel gas of altar lamp 11 is conveyed by altar lamp metal hose and supplied.
Fire hole 13 and peephole 15 are weldingly fixed on 14 bottom preset mounting hole of burner cylinder, are mainly used for lighting a fire
And observation flame is used.
1 inside setting gas gun quantity 3-8 branch of burner brazier brick（It is designed according to load）, preferably 4, be distributed on
On the circumference of burner centre.Fuel gas is divided into two-stage by the nozzle in 2 pipette tips of gas gun, and first order fuel gas passes through nozzle
Nozzle top orifice by primary fuel gas blowout to 1 inner wall of brazier brick, and goes upward to Zhuan Kou, in uplink along 1 inner wall of brazier brick
It is mixed with primary air, level-one flame combustion is realized at fire pot transit；
Nozzle wall is provided with secondary fuel spray orifice, the corresponding preformed hole of spray orifice alignment 1 side wall of brazier brick, by secondary fuel conductance to
There is combustion gas guide housing 3 outside brazier brick 1, outside brazier brick 1, form annular gap between 1 outer wall of combustion gas guide housing 3 and brazier brick, two
Grade fuel gas is directed to by the gap at 1 outer bead of brazier brick, is mixed with inner flue gas of the stove and is gone upward to combustion along 1 outer wall of brazier brick
Burn region, in 1 overhead of brazier brick with mixed flue gas after single-stage combustion in uplink while mix, up to completely burned completion.
Burner combustion air is classified to primary air and secondary combustion-supporting air, respectively from the one of burner base
Secondary combustion air and secondary combustion-supporting air tune wind butterfly valve entrance enter burner.Wherein, primary air passes through primary combustion-supporting
Enter in burner tube body 14 after air butterfly valve 9, and uplink, until by brazier brick 1, burner hearth is sprayed into from brick mouth, it is primary combustion-supporting
Air tentatively mixes in brazier brick 1 with primary fuel gas, is exported in brazier brick 1 and top is burnt；Secondary combustion-supporting air passes through
Enter flue gas ejection system 4 after 10, the uplink in 4 central air hose of flue gas ejection system into Venturi tube 7, is helped by secondary
Air high speed injection is fired, will be sucked in burner hearth close to the flue gas of furnace bottom, after being mixed with secondary combustion-supporting air, spray brazier brick at a high speed
1 export center, the mixed gas is due to containing a large amount of flue gases, so oxygen content reduces, temperature raising, this part gaseous mixture is by text
Venturi 7 spray into flame kernel, with flame combustion elect rise, constantly with primary fuel and secondary fuel gas, Yi Jiyi
Secondary combustion air is mixed and burned, until wherein oxygen consumption is complete, burning is completed, final to realize inner flue gas of the stove circulating combustion.
Inner flue gas of the stove ejection system 4 utilizes 7 mixing principle of Venturi tube, and secondary combustion-supporting air passes through in Venturi tube 1
Inner nozzle 6 sprays at a high speed, and the low pressure formed in Venturi tube 7, Venturi tube 7 is connected by 4 fume pipes 5 with burner hearth, no
Disconnectedly by the flue gas suction line close to furnace bottom, and from 7 upper outlet spray feed of Venturi tube to flame kernel.It is secondary by adjusting
10 aperture of combustion air butterfly valve, can adjust secondary combustion-supporting air, and then adjust the exhaust gas volumn of its injection, to reach best combustion
Burning and NOxEmission effect.
Since primary fuel and secondary fuel are respectively along the adherent uplink of 1 inside and outside wall of brazier brick, brazier brick mouth forms
Ring fuel gas distributed areas, in fuel gas overrich state, fuel gas is constantly spread in constantly uphill process is elected, and
There is partial hearth flue gas to be mixed into；And fire pot center is mainly primary air, secondary combustion-supporting air and injection flue gas gaseous mixture,
Therefore, during continuous uplink, outer shroud fuel gas is gradually mixed in interface with internal combustion air, is spread, from Zhuan Kou
Start to burn, until burning is complete.Therefore, hollow annular flame is presented in burner, and flame kernel temperature is relatively low, NOxIt generates
Inhibit to effective.
Burner sets altar lamp 11, and using the 11 main flame of flame ignition burner of altar lamp, the root of main flame is steady
Brazier brick choma shape endface is scheduled on, when primary air sprays brick outlet, vortex low-pressure area is formed at the annular end face,
A part of primary air, firsts and seconds fuel gas are sucked and mixed by the low-pressure area, since vortex flow velocity is low, flame combustion
It burns more stable.
Every 2 top of gas gun is equipped with nozzle, and spray orifice is provided on nozzle.Branched gas gun 2 is fixed by flange, bolt
In 14 bottom end plate of cylinder, 2 fuel gas inlet end of gas gun is connect with annular drum pipe, and annular drum pipe passes through metal hose
It is connect with factory owner's gas hose 16, effect is that combustion gas is uniformly distributed to every gas gun 2.
Altar lamp 11 lights main flame, 11 fuel gas inlet of altar lamp by altar lamp 11 again by manual firing after lighting
It is connect using hose 12 with burning line.
Peephole 15 and fire hole 13 are provided in 14 bottom end plate of burner cylinder.
As shown in Figure 1, secondary combustion-supporting air intake 17, primary air entrance 18, main fuel gas inlet 19, altar lamp combustion
The position of injection smoke inlet 21 in gas entrance 20 and stove.
In conclusion by means of the above-mentioned technical proposal of the present invention, combustion gas is divided into 2 grades by nozzle, by once helping
Combustion air is divided into 2 grades by combustion air and secondary combustion-supporting air butterfly valve etc., then, venturi is utilized further through secondary combustion-supporting air
Pipe injection inner flue gas of the stove reflux recycle burning, and pass through rational fuel gas and be classified Proportionality design, flexible adjusting control one
Combustion gas recirculation volume in the stove of secondary, secondary combustion-supporting air and its injection, realizes a variety of low NOxThe combination application of combustion technology,
So as to reach ultralow NOxThe purpose of discharge.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (10)
1. a kind of ultralow NO of cycle in flue gasxDischarge gas burner, which is characterized in that including burner brazier brick（1）, it is described
Brazier brick（1）Inside is provided with several gas guns（2）, the gas gun（2）Nozzle top be equipped with the first spray orifice, by institute
The fuel for stating the first spray orifice sprays to brazier brick（1）Inner wall, the gas gun（2）Nozzle side be equipped with the second spray orifice, it is described
Brazier brick（1）Side wall is equipped with and the matched through-hole of the second spray orifice, the brazier brick（1）Lateral wall is equipped with combustion gas guide housing
（3）, the brazier brick（1）Lateral wall and the combustion gas guide housing（3）Between form annular gap, by second spray orifice
Fuel sprays to annular gap；The brazier brick（1）Center is equipped with flue gas ejection system（4）, the flue gas ejection system（4）Including
Intersect the fume pipe of connection（5）, the fume pipe（5）Center is equipped with inner nozzle（6）, the inner nozzle（6）Upper end is connected with
Venturi tube（7）, the inner nozzle（6）With the fume pipe（5）It interconnects, the fume pipe（5）External port and fire pot
Brick（1）Inside connects, the inner nozzle（6）Lower end and secondary combustion-supporting air communication, primary air lead to brazier brick（1）
It is interior.
2. a kind of ultralow NO of cycle in flue gas according to claim 1xDischarge gas burner, which is characterized in that the combustion gas
Rifle（2）It totally 4 and is uniformly distributed and is set to the brazier brick（1）Inside.
3. a kind of ultralow NO of cycle in flue gas according to claim 1xDischarge gas burner, which is characterized in that the flue gas
Pipe（5）Between pass through side arc plate（8）Connect into circle.
4. a kind of ultralow NO of cycle in flue gas according to claim 1xDischarge gas burner, which is characterized in that described primary
Combustion air passes through primary air pipeline and primary air butterfly valve（9）Connection, the secondary combustion-supporting air pass through two
Secondary comburent air duct and secondary combustion-supporting air butterfly valve（10）Connection.
5. a kind of ultralow NO of cycle in flue gas according to claim 1xDischarge gas burner, which is characterized in that the fire pot
Brick（1）It is interior to be equipped with altar lamp（11）, the altar lamp（11）It is connected with altar lamp gas pipeline.
6. a kind of ultralow NO of cycle in flue gas according to claim 5xDischarge gas burner, which is characterized in that described kept burning day and night
Lamp（11）Pass through hose between altar lamp gas pipeline（12）Connection, the hose（12）With the altar lamp（11）Between set
There is fire hole（13）.
7. a kind of ultralow NO of cycle in flue gas according to claim 1xDischarge gas burner, which is characterized in that the fire pot
Brick（1）Downside is connected with cylinder（14）, the cylinder（14）Inner wall is provided with insulating layer, and liner is provided on the inside of the insulating layer
Protect steel wire.
8. a kind of ultralow NO of cycle in flue gas according to claim 7xDischarge gas burner, which is characterized in that the combustion gas
Rifle（2）Pass through flange and bolt and cylinder（14）Connection.
9. a kind of ultralow NO of cycle in flue gas according to claim 1xDischarge gas burner, which is characterized in that the combustion gas
Rifle（2）Input end connect with annular drum pipe.
10. a kind of ultralow NO of cycle in flue gas according to claim 1xDischarge gas burner, which is characterized in that the fire
Basin brick（1）For frustum cone structure.
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| CN201810144837.1A CN108266727B (en) | 2018-02-12 | 2018-02-12 | Ultra-low NO of internal circulation of flue gas x Exhaust gas burner |
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| CN201810144837.1A CN108266727B (en) | 2018-02-12 | 2018-02-12 | Ultra-low NO of internal circulation of flue gas x Exhaust gas burner |
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| CN108266727B CN108266727B (en) | 2024-04-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539258A (en) * | 2019-01-11 | 2019-03-29 | 佛山市科皓燃烧设备制造有限公司 | A kind of low NOx radiant tube combustion system of adjustable smoke backflow amount |
| CN111911917A (en) * | 2020-07-15 | 2020-11-10 | 江苏迈阳环保有限公司 | Flue gas circulating device for combustor |
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|---|---|
| CN108266727B (en) | 2024-04-02 |
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