CN109764334A - Low Nox coke oven gas burner - Google Patents
Low Nox coke oven gas burner Download PDFInfo
- Publication number
- CN109764334A CN109764334A CN201910069491.8A CN201910069491A CN109764334A CN 109764334 A CN109764334 A CN 109764334A CN 201910069491 A CN201910069491 A CN 201910069491A CN 109764334 A CN109764334 A CN 109764334A
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- Prior art keywords
- burner
- gas
- secondary air
- coke oven
- air duct
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- 239000000571 coke Substances 0.000 title claims abstract description 25
- 239000007921 spray Substances 0.000 claims abstract description 5
- 238000002485 combustion reaction Methods 0.000 claims description 27
- 238000007664 blowing Methods 0.000 claims description 25
- 239000003381 stabilizer Substances 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 abstract description 87
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003546 flue gas Substances 0.000 abstract description 12
- 239000000446 fuel Substances 0.000 abstract description 8
- 238000005096 rolling process Methods 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 description 10
- 229910052739 hydrogen Inorganic materials 0.000 description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000003245 coal Substances 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 3
- 230000003134 recirculating effect Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000000391 smoking effect Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 208000018875 hypoxemia Diseases 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 201000009240 nasopharyngitis Diseases 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention discloses a kind of low Nox coke oven gas burners, the secondary air duct inner circumferential of burner be uniformly arranged there are two and more than two main gas gun, an air duct axis along burner is provided with central point firelock, the nozzle of secondary air duct is provided with Secondary Air reamer, the nozzle of main gas gun extends to Secondary Air reamer end, main gas gun is with 5 °~30 ° of angle, the speed of 50m/s~85m/s sprays coke-stove gas to the end perimeter smoke-gas area of burner, for rolling up flue gas around suction fuel burner, to reduce the ignition temperature of burner tip.
Description
Technical field
The present invention relates to boiler technology field, especially a kind of boiler-burner.
Background technique
Coke-stove gas is a kind of middle high heating value gas, is mainly made of hydrogen and methane, wherein hydrogen components account for about 55%
~60%.Because hydrogen content is higher, so that the combustion characteristics of coke-stove gas is similar to hydrogen, there is faster burning velocity, compared with
High theoretical temperature combustion, and flame travel is short, and tempering trend is strong.The researcher of Institute of Engineering Thernophysics, Academia Sinica
It also found in paper " hydrogen content studies the influence of hydrogen/methane mixed gas diffusion combustion characteristic ", with hydrogen accounting
Increase, the ignition temperature of hydrogen and methane mixed gas increases, and NOx emission increases with it, and flame travel shortens, combustion stability
Increase, flame is difficult to put out.Also Chang Faxian in actual motion, using Coke-oven Gas Boiler NOx emission often will be more than natural gas
The NOx emission of boiler.Tar content is higher in coke-stove gas simultaneously, is easy blocking coke oven gas burner spout, when serious very
To causing burner scaling loss, the safe and stable operation of adversely affecting its combustion device and boiler plant.
It is directed to the combustion characteristics of coke-stove gas at present, has developed and has applied for a small amount of coke oven gas burner technology, such as
Patent CN201720664874.6- low pressure coke oven gas burner, a kind of modified coke-oven coal of patent CN201520181071.6-
The burner structure provided in air burner.But these lay particular emphasis on the reliability of overheavy firing equipment, such as add to coke-stove gas
To avoid stopping working, the muzzle velocity for improving coke-stove gas avoids being tempered flame on duty rifle, adds filter screen and avoids tar blocking etc.,
All not from the problem of reducing reduction NOx emission from the point of view of ignition temperature.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of coke oven gas burners, can reduce coke oven coal combustion pot
The discharge of furnace NOx.
Basic principle of the invention: in order to solve the problems in background technique, the present invention is based on flue gas recirculations to reduce furnace
The basic principle of thorax flame temperature rolls up the technology for inhaling burner hearth inner periphery flue gas using burner coke-stove gas high-speed jet,
And burner fuel staging combustion technology and burner air grading combustion technology are combined, to obtain lower furnace chamber inner combustion temperature
Degree realizes that the flue gas volume in burner hearth inhales recycling, to reduce furnace chamber inner combustion temperature, obtains lower NOx emission.
Based on above-mentioned basic principle, the technical scheme adopted by the invention is that: low Nox coke oven gas burner is burning
There are two the secondary air duct inner circumferential of device is uniformly arranged and more than two main gas guns, an air duct axis along burner are arranged
There is central point firelock.The nozzle of secondary air duct is provided with Secondary Air reamer, and the nozzle of main gas gun extends to Secondary Air reamer
End, main gas gun are sprayed with 5 °~30 ° of angle, the speed of 50m/s~85m/s to the end perimeter smoke-gas area of burner
Coke-stove gas, for rolling up flue gas around suction fuel burner, to reduce the ignition temperature of burner tip.
Further, the 90%~99% of the total gas quantity of spout flow summation Zhan of all main gas guns guarantees by more
The coke-stove gas of significant portion of coke-stove gas is uniformly dispersed by a main gas gun, from the coke-oven coal of main gas gun high speed ejection
Gas is for rolling up flue gas around suction fuel burner, to reduce the ignition temperature of burner tip.
Further, secondary air duct entrance is provided with the secondary air regulation door for adjusting secondary air flow, the total wind of secondary air flow Zhan
The 20%~60% of amount, secondary wind wind speed are 30m/s~50m/s, and main gas gun is arranged in secondary air channel, pass through Secondary Air
It adjusts door and reduces secondary air flow, realize the fuel-staged combustion of more large scale, coke-stove gas volume smoking tolerance can also be made further
Increase.
Further, the primary air flow in an air duct accounts for the 40%~80% of total blast volume, First air wind speed be 30m/s~
50m/s, First air are designed using big flow ratio and fair speed, and air quantity is higher compared with Secondary Air, cooperation burning torch sleeve and steady combustion
Device forms wide sized central recirculating zone, realizes the flame structure of burner shrinkage type, avoids the coke-stove gas of high-speed jet excessively
Diffusion.
Further, the spout end of secondary air duct is provided with delay mixed plate, to avoid Secondary Air and Extraction From Coke Oven Gas
Preceding mixing.
Further, burning torch sleeve is set on central point firelock, wind speed is 5~20m/s in burning torch sleeve, is used for
Cooling central point firelock or flame on duty rifle.
Further, it is provided with delay mixing ring between the end in air duct and the end of secondary air duct, can avoid coke
Producer gas is contacted with First air in advance, strengthens Researched of Air Staging Combustion Burning Pulverized Coal.
Further, an air duct port arrangements have stabilizer, and burning torch sleeve and stabilizer are coaxially disposed.
Further, flame on duty rifle is provided in an air duct, flame on duty rifle is designed using low burn tolerance, fire on duty
The 1%~10% of the total gas quantity of gas quantity Zhan of flame rifle can export to form wide scale lean combustion oxygen-enriched combusting in First air, reduce combustion
Burn temperature.
Further, the tail portion of burner is disposed with steam blowing equipment, and steam blowing equipment includes steam blowing header
With steam blowing air gun, steam blowing header provides steam for steam blowing air gun, and steam blowing air-gun arrangement is in main gas gun
Tail portion, steam blowing air gun and main gas gun are corresponded, can be purged to it, remove and stick dirty tar in air gun.
The beneficial effects of the present invention are:
(1) it is rolled up present invention employs First air secondary air grading combustion technology fuel gas high-speed jet stream flue gas and inhales recycling
Technology and wide scale fuel-staged combustion technology realize burner to the volume of flue gas around by spraying high-speed jet outside coke-stove gas
Recycling is inhaled, realizes main gas gun under the multiple action that burner secondary air regulation gate delay mixes ring delays mixed plate etc.
Fuel-staged combustion realizes the Lean burn combustion of burner centre flame on duty under the wide size stabilizer effect of First air, these
The combination of combustion technology can sufficiently reduce coke-stove gas burned flame temperature, so that the NOx emission of boiler is reduced, by a large amount of
Analytical calculation, the burner than common coke oven gas burner NOx emission reduce by 60% or more.
(2) hydrogen content in coke-stove gas is reduced, burner is returned after flue gas around coke-stove gas volume suction fuel burner
Fiery trend decline, to improve burner service life.
(3) burner tail portion is also provided with steam blowing equipment, can blows down and sticks the substances such as dirty tar in main gas gun,
Tar is avoided to block air gun nozzle, to promote the reliability of burner.
Detailed description of the invention
Fig. 1 is the structure chart of burner of the present invention.
Fig. 2 is the structure chart of burner tip of the present invention.
Fig. 3 is the main view of the main gas gun of the present invention.
Fig. 4 is the top view of the main gas gun of the present invention.
Fig. 5 is the right view of the main gas gun of the present invention.
In the figure, it is marked as 1- combustion gas distribution header, 2- hot wind regulating device, 3- hot wind controllable register, the main gas gun of 4-,
401- inlet end, 402- jet end, 5- secondary air regulation door, 6- Secondary Air reamer, 7- burning torch sleeve, 8- steam blowing collection
Case, 9- stabilizer, 10- delay mixed plate, 11- delay mixing ring, 12- central point firelock, 13- steam blowing air gun, 14- are on duty
Flame gun.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Fig. 1 Fig. 2, low Nox coke oven gas burner of the invention is uniform in the secondary air duct inner circumferential of burner
There are two settings and more than two main gas guns 4, and the quantity of main gas gun 4 carries out Rational choice according to burner rating, generally
Choose 2~16.The nozzle of secondary air duct is provided with Secondary Air reamer 6, and the nozzle of main gas gun 4 extends to Secondary Air reamer
6 ends, in order to guarantee that main gas gun 4 can be with 5 °~30 ° of angle, the speed of 50m/s~85m/s is all to the end of burner
Smoke-gas area injection coke-stove gas is enclosed, as in Figure 3-5, the structure of main gas gun 4 includes inlet end 401 and jet end 402, spray
The cross-sectional area at gas end 402 is less than the cross-sectional area of jet end 402, so that coke-stove gas high speed is sprayed from jet end 402, spray
Speed is generally 50m/s~85m/s, meanwhile, jet end 402 has certain tilt angle, the tilt angle compared to inlet end 401
It is determined according to the angle of Secondary Air reamer 6, generally 5 °~30 °, when installation, jet end 402 is mounted in Secondary Air reamer 6.
Further, in order to guarantee equably divide significant portion of coke-stove gas by multiple main gas guns 4
It dissipates, main gas gun 4 is arranged in outermost secondary air duct, while increasing the spout flow of main gas gun 4, is designed into
The 90%~99% of the total gas quantity of spout flow summation Zhan of all main gas guns 4, coke-stove gas are distributed from the combustion gas of burner
Header 1 is spread after secondary air duct enters main gas gun 4 from the high-speed fuel gas that jet end 402 sprays to the periphery of burner
A large amount of burner hearth flue gas is inhaled with volume, it, can be in burner First air export center recirculating zone after coke-stove gas rolls up smoking gas
It gradually to central reduction under effect, is gradually contacted with Secondary Air First air, realizes that flue gas inhales recycle burning from volume, avoid coke oven
The direct high-temp combustion of coal gas generates a large amount of NOx emissions；Simultaneously around coke-stove gas volume suction fuel burner after flue gas, hydrogen content drop
Low, tempering trend decline can avoid burner scaling loss, to improve burner service life.
Further, the secondary air regulation door 5 of adjusting secondary air flow, the secondary air regulation are provided in secondary air duct entrance
For door 5 using the structure of controllable register blades, secondary air flow accounts for the 20%~60% of total blast volume, secondary wind wind speed be 30m/s~
50m/s, the spout end of secondary air duct be provided with delay mixed plate 10, make Secondary Air contraction of jet, avoid Secondary Air in advance and
Coke-stove gas jet mixing.The fuel-rich of main gas gun 4 is realized by reducing Secondary Air air quantity and postponing Secondary Air to mix with fuel
The fuel-staged combustion of hypoxemia.
Further, in order to strengthen Researched of Air Staging Combustion Burning Pulverized Coal, postpone the mixing of First air and main 4 combustion gas of gas gun, primary
Delay mixing ring 11 is provided between the end in air duct and the end of secondary air duct.
Further, an air duct port arrangements have stabilizer 9, and burning torch sleeve 7 and stabilizer 9 are coaxially disposed, once
Flame on duty rifle 14 is provided in air duct, First air is provided needed for the igniting of burner root or the burning of flame on duty stable ignition
The air wanted, in order to form wide scale lean combustion oxygen-enriched combusting, flame on duty rifle 14 is designed using low burn tolerance, flame on duty rifle 14
The total gas quantity of gas quantity Zhan 1%~10%.Stabilizer 9 forms the Central backflow area of wide scale in burner nozzle, makes to fire
Burner forms shrinkage type flame structure, avoids the burner flame under the jet action of main gas gun 4 from excessively spreading, while may be used also
By the lean combustion low-temperature burning of wide size reflux realization center flame on duty, the temperature of center flame on duty is reduced.Coke-stove gas
Coke oven gas burner can cancel flame on duty rifle when to mix burning.
Further, in order to cooperate burning torch sleeve 7 and stabilizer 9 to facilitate the formation of First air export center recirculating zone,
The First air of burner is designed using big flow ratio and fair speed, and air quantity is higher compared with Secondary Air, and primary air flow accounts for total blast volume
40%~80%, First air wind speed is 30m/s~50m/s, realizes the flame structure of burner shrinkage type, avoids high-speed jet
Coke-stove gas is excessively spread, and in order to adjust intake, the air inlet of general burner is provided with hot wind regulating device 2, hot wind tune
Regulating device 2 generally uses 3 structure of hot wind controllable register, controls one by adjusting hot wind controllable register 3 and secondary air regulation door 5
Secondary air quantity and wind speed.
Further, it is set with burning torch sleeve 7 on central point firelock 12, uses low velocity wind, wind speed in burning torch sleeve 7
For 5m/s~20m/s., for cooling down central point firelock 12 or flame on duty rifle 14, the air quantity in burning torch sleeve 7 can be drawn from
Primary air fan exports high-head cold wind and also may be derived from hot air duct to be fully cooled ignition installation.
Further, the tail portion of burner is disposed with steam blowing equipment, and steam blowing equipment includes steam blowing header 8
With steam blowing air gun 13, steam blowing header 8 is that steam blowing air gun 13 provides steam, and steam blowing air gun 13 is arranged in master
The tail portion of gas gun 4, steam blowing air gun 13 and main gas gun 4 correspond, and can purge to it, remove main gas gun 4
The tar of interior glutinous dirt.
Claims (10)
1. low Nox coke oven gas burner, it is characterised in that: the secondary air duct inner circumferential of burner be uniformly arranged there are two and
More than two main gas guns (4), an air duct axis along burner are provided with central point firelock (12), the spout of secondary air duct
Place is provided with Secondary Air reamer (6), and the nozzle of main gas gun (4) extends to Secondary Air reamer (6) end, main gas gun (4) with
The speed of 5 °~30 ° of angle, 50m/s~85m/s sprays coke-stove gas to the end perimeter smoke-gas area of burner.
2. low Nox coke oven gas burner as described in claim 1, it is characterised in that: the spout stream of all main gas guns (4)
Measure the 90%~99% of the total gas quantity of summation Zhan.
3. low Nox coke oven gas burner as described in claim 1, it is characterised in that: secondary air duct entrance is provided with adjusting
The secondary air regulation door (5) of secondary air flow, secondary air flow account for the 20%~60% of total blast volume, secondary wind wind speed be 30m/s~
50m/s。
4. low Nox coke oven gas burner as described in claim 1, it is characterised in that: the primary air flow Zhan in an air duct is total
The 40%~80% of air quantity, First air wind speed are 30m/s~50m/s.
5. such as the described in any item low Nox coke oven gas burners of Claims 1-4, it is characterised in that: the spout of secondary air duct
End is provided with delay mixed plate (10).
6. low Nox coke oven gas burner as claimed in claim 5, it is characterised in that: central point firelock is set on (12)
Burning torch sleeve (7), burning torch sleeve (7) interior wind speed are 5m/s~20m/s.
7. low Nox coke oven gas burner as claimed in claim 6, it is characterised in that: the end in air duct and Secondary Air
Delay mixing ring (11) is provided between the end in road.
8. low Nox coke oven gas burner as claimed in claim 7, it is characterised in that: one time air duct port arrangements have steady combustion
Device (9), burning torch sleeve (7) and stabilizer (9) are coaxially disposed.
9. low Nox coke oven gas burner as claimed in claim 8, it is characterised in that: be provided with fire on duty in an air duct
Flame rifle (14), flame on duty rifle (14) are designed using low burn tolerance, and the 1% of the total gas quantity of gas quantity Zhan of flame on duty rifle (14)
~10%.
10. low Nox coke oven gas burner as claimed in claim 9, it is characterised in that: the tail portion of burner is disposed with steam
Blow device, steam blowing equipment include steam blowing header (8) and steam blowing air gun (13), and steam blowing header (8) is
Steam blowing air gun (13) provides steam, and steam blowing air gun (13) is arranged in the tail portion of main gas gun (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069491.8A CN109764334A (en) | 2019-01-24 | 2019-01-24 | Low Nox coke oven gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069491.8A CN109764334A (en) | 2019-01-24 | 2019-01-24 | Low Nox coke oven gas burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109764334A true CN109764334A (en) | 2019-05-17 |
Family
ID=66454255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910069491.8A Pending CN109764334A (en) | 2019-01-24 | 2019-01-24 | Low Nox coke oven gas burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107898A (en) * | 2019-05-30 | 2019-08-09 | 唐山金沙燃烧热能股份有限公司 | A kind of coke-stove gas low NO |
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|---|---|---|---|---|
| CN110107898A (en) * | 2019-05-30 | 2019-08-09 | 唐山金沙燃烧热能股份有限公司 | A kind of coke-stove gas low NO |
| CN110107898B (en) * | 2019-05-30 | 2024-03-26 | 唐山金沙燃烧热能股份有限公司 | Coke oven gas low-nitrogen burner |
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