CN209484598U - A kind of low-heat value gas low NOx drainage burner - Google Patents
A kind of low-heat value gas low NOx drainage burner Download PDFInfo
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- CN209484598U CN209484598U CN201821924785.1U CN201821924785U CN209484598U CN 209484598 U CN209484598 U CN 209484598U CN 201821924785 U CN201821924785 U CN 201821924785U CN 209484598 U CN209484598 U CN 209484598U
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Abstract
The utility model discloses a kind of low NO of low-heat value gasXEmission combustor, including gas inlet system, air inlet system and ignition system, the gas inlet system includes low-heat value gas channel, the air inlet system includes the level-one wind system being arranged in low-heat value gas channel, the second level wind system being arranged on the outside of low-heat value gas channel, the setting of multiple gun annular are distributed in the three-level wind system on the outside of second level wind system.Multistage air inlet system is set by single air inlet mode, swirl vane is installed, regulates and controls gas passage and the position of wind at different levels outlet the regulation, it can be achieved that air inlet and the contact position and air quantity at different levels of coal gas, to improve the steady combustion ability of coal gas and air, the burn-off rate of coal gas is improved, NO is reducedXGeneration.In addition, setting installation high-energy igniter, can be realized automatic ignition；Setting installation flame detector, can be used for safety interlocking protection；Improve the degree of automation and safety of this burner.
Description
Technical field
The utility model relates to pure combustion low-heat value gas gas fired-boiler technical field, in particular to pure combustion low-heat value gas combustion
The low NOx drainage gas burner of gas boiler.
Background technique
China is steel big producer, at present domestic iron and steel enterprises for low-heat value gas (such as blast furnace gas, converter coal
Gas) recovery utilization rate is relatively low, many mini-medium mills to the recycling of blast furnace gas and using not causing enough attention,
Low-heat value gas more than 20% or more is directly emptied or is diffused burning.In addition, containing a large amount of oxidations in low-heat value gas
The harmful chemicals such as carbon, have seriously polluted the environment, while also resulting in the huge waste of the energy.Low-heat value gas is logical at this stage
It is recycled, turns waste into wealth frequently as gas boiler fuel.Simultaneously because NOx emission index request is higher and higher, use is low
Gas fired-boiler of the calorific value of gas as fuel causes coal gas surely to fire ability poor, burner because of gas burner reasons in structure itself
It adjusts than small, the original NOx emission of gas fired-boiler is unable to satisfy existing NOx emission and forces standard requirements.Although the original NOx row of boiler
Putting can not be up to standard, can be by increasing out of stock realization, but can greatly increase project construction cost and later period operating cost.
Therefore, it is necessary to study a kind of novel low NO of low-heat value gasXEmission combustor improves the steady combustion energy of coal gas
Power so that gas-fired is complete, and reduces the discharge of NOx.
Utility model content
The utility model aim is: in view of the above problems, providing a kind of low-heat value gas low NOx discharge combustion
Burner, it is used to improve the steady combustion ability of low-heat value gas, increases turndown ratio, burner regulation ratio, reduces the original NOx emission value of boiler.
Technical scheme of the utility model is as follows:
A kind of low NO of low-heat value gasXEmission combustor, including gas inlet system, air inlet system and ignition system, institute
Stating gas inlet system includes low-heat value gas channel, and the air inlet system includes level-one wind system, second level wind system, force 3 wind
System is sequentially distributed to burner hearth along low-heat value gas channel since gas inlet direction；The setting of the level-one wind system exists
In low-heat value gas channel, the inlet of level-one wind system is provided with damper；The second level wind system is arranged in low heat value
On the outside of gas passage, the three-level wind system is distributed on the outside of second level wind system, is arranged using multiple gun annular, the light breeze system
System and force 3 wind system entry are provided with air quantity controllable register；The ignition system includes being arranged in the channel of level-one wind system
Ignition air gun casing and ignition air gun casing in ignition air gun.
Air inlet control is entered into hearth combustion for force 3 wind altogether.Force one wind (also known as combustion air), is arranged in gas passage
Portion forms anoxycausis in combustion centre because excess air coefficient is much smaller than 1, is suitably reducing the temperature of flame kernel simultaneously
Reduce the generation of NOx.Light breeze (also known as fuel air), is arranged in outside gas passage, for wind needed for providing gas-fired
Amount.For the excess air coefficient of primary combustion zone at this time still less than 1, primary combustion zone is still anoxycausis device, is advantageously reduced
The generation of NOx.Force 3 wind (also known as burnout degree) is distributed in burner outermost using direct current annular multiple gun, for providing low-heat
Air needed for being worth coal gas after-flame.After-flame region excess air coefficient is greater than 1 at this time, effectively reduces the generation of NOx.In addition, three
Grade elegance is sprayed with multiple gun formula direct current, after the force 3 wind air-flow of high speed sprays burner, reinforces the volume energy-absorbing power to low-temperature flue gas,
The recycling of form inner flue gas of the stove, reduces flame temperature, further reduces NOx and generates.
Further, in the channel of the level-one wind system, high-energy ignition dress is closely additionally provided at ignition air gun casing
It sets, high energy ignition unit casing is provided with outside the high energy ignition unit, realize automatic ignition.
Further, the burner is additionally provided with fire inspection casing, installs flame detector in fire inspection casing, can be used for pacifying
Full interlock protection.
Further, the entrance of the second level wind system is provided with an air quantity controllable register, adjusts entrance air quantity, second level
The air quantity of wind is maximum, therefore a linkage controllable register is arranged.
Further, the entrance air quantity controllable register of the three-level wind system is independent, and is parallel to linkage air quantity and is adjusted
Baffle adjusts entrance air quantity.
Further, the level-one wind system, second level wind system and low-heat value gas channel exit are provided with eddy flow leaf
Piece.Preferably, the entrance that the low-heat value gas channel enters burner hearth is provided with two layers of swirl vane.The outlet of level-one wind system
Place's setting swirl vane, generates swirling eddy after so that force one wind is sprayed burner, premixes in advance with the low-heat value gas of rotation, energy
The steady combustion ability of low-heat value gas is effectively improved, turndown ratio, burner regulation ratio is improved.Swirl vane is arranged in light breeze nozzle, makes second level
The strong swirling eddy of wind can effectively be sufficiently mixed burning between low-heat value gas, and overheavy firing improves the burn-off rate of coal gas；Cause
Gas port is larger, and two layers of swirl vane is arranged, and the swirl strength for coal gas of increasing export is conducive to the mixing with combustion air,
Improve steady combustion ability.
Further, the channel middle position of level-one wind system is arranged in the ignition air gun.
Further, the level-one wind system, low-heat value gas channel, second level wind system and three-level wind system export to
The horizontal distance of the muzzle of ignition air gun is according to level-one wind system, low-heat value gas channel, second level wind system, three-level wind system
Order is sequentially increased.It is advantageously implemented fractional combustion, avoids interfering with each other for multistage wind entrance.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are: by single air inlet mode
Be set as multistage air inlet system, the position of installation swirl vane, regulation gas passage and wind at different levels outlet, it can be achieved that air inlet with
The regulation of the contact position of coal gas and air quantity at different levels improves the burn-off rate of coal gas to improve the steady combustion ability of coal gas and air,
Reduce NOXGeneration.In addition, setting installation high-energy igniter, can be realized automatic ignition；Setting installation flame detector, can
It is protected for safety interlocking；Improve the degree of automation and safety of this burner.The utility model low heat value low nitrogen burning
Device uses low-heat value gas, because that can answer with advantages such as steady combustion ability is strong, burn-off rate is high, the big, low NOx drainages of burning adjusting ratio
For in the fuel gas with low heat value boiler such as burning blast furnace gas, coal gas of converter.
Detailed description of the invention
Fig. 1 is the low NO of low-heat value gas of the utility modelXEmission combustor schematic diagram；
Fig. 2 is schematic diagram of the Fig. 1 along A-A section.
Marked in the figure: 1 be low-heat value gas channel, 2 be level-one wind system, 3 be second level wind system, 4 be three-level wind system,
5 it is damper, 6 be linkage air quantity controllable register, 7 be independent air quantity controllable register, 8 be ignition air gun casing, 9 is igniting
Air gun, 10 be high energy ignition unit, 11 be fire inspection casing, 12 be swirl vane.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Such as FIG. 1 to FIG. 2, a kind of low NO of low-heat value gasXEmission combustor, burner are supplied by the way of staged air distribution
Combustion air is divided into force one wind, light breeze and force 3 wind by single air distribution by wind.Gas inlet system is logical for low-heat value gas
Road 1, air inlet system is divided into level-one wind system 2, second level wind system 3, three-level wind system 4, to burner hearth since gas inlet direction
It is sequentially distributed along low-heat value gas channel；The setting of the level-one wind system in low-heat value gas channel, level-one wind system 2
Inlet is provided with damper 5；The second level wind system 3 is arranged in 1 outside of low-heat value gas channel, the three-level wind system
4 are distributed in 3 outside of second level wind system, are arranged using multiple gun annular, the entrance of the second level wind system 3 is provided with 1 linkage wind
Controllable register 6 is measured, 4 entrance of three-level wind system is parallel to linkage air quantity controllable register and is provided with an independent air quantity controllable register 7；
The ignition system includes the point in the ignition air gun casing 8 and ignition air gun casing 8 being arranged in the channel of level-one wind system 2
Internal heat rifle 9.In the channel of the level-one wind system 2, high energy ignition unit 10, institute are closely additionally provided at ignition air gun casing 8
It states and is provided with high energy ignition unit casing outside high energy ignition unit 10, realize automatic ignition.The burner is additionally provided with fiery inspection
Casing 11, fire examine mountable flame detector in casing 11, can be used for safety interlocking protection.
Further, the level-one wind system 2, second level wind system 3 and 1 exit of low-heat value gas channel are provided with eddy flow
Blade 12.Wherein, it is two layers that the low-heat value gas channel 1, which enters the swirl vane 12 of the entrance of burner hearth,.The ignition air gun 9
The channel middle position of level-one wind system 2 is set.
Further, the level-one wind system 2, low-heat value gas channel 1, second level wind system 3 and three-level wind system 4 go out
Mouth arrives the horizontal distance of the muzzle of ignition air gun 9 according to level-one wind system 2, low-heat value gas channel 1, second level wind system 3, three-level
The order of wind system 4 is sequentially increased.
When this burner is run, coal gas, force one wind, light breeze pass through respectively outlet and enter burner hearth, and force 3 wind is using straight
Flow nozzle enters in multiple gun annular.The investment of force one wind is pre-mixed low-heat value gas with combustion air in advance, can effectively mention
The steady combustion ability of high gas burner, while the burner of low-heat value gas can be strengthened, improve burn-off rate.When igniting, force one wind
Predominantly ignition air gun 9 provides the required air that burns；When burner operates normally, First air is as fractional combustion wind.Once
Wind air quantity accounts for about the 10~20%% of total blast volume.It is since gas volume is far longer than air capacity, i.e., excessive empty in force one wind region
Coefficient is far smaller than 1, forms anaerobism burning in force one wind region in this way, reduces the production of NOx.
Light breeze is mainly used for air quantity needed for providing low-heat value gas combustion, and Secondary Air air quantity accounts for about the 60% of total blast volume
~80%.In light breeze region, since gas volume is still greater than air capacity, i.e., excessive duty factor is less than 1, in this way in light breeze region
It still burns for anaerobism, reduces the production of NOx.
Force 3 wind is used for the after-flame of low-heat value gas.Force 3 wind accounts for about the 15%~25% of total blast volume.In force 3 wind region,
Since gas volume is less than air capacity, excessive duty factor is made to be greater than 1, is in this way oxygen-enriched combusting in force 3 wind region, in overheavy firing
While can effectively reduce the generation of NOx.In addition, the investment of force 3 wind, can enhance flame to the volume energy-absorbing power of low-temperature flue gas, make
Burner region forms inner flue gas of the stove recycling, and the temperature peak of uniform main flame reduces the discharge value of NOx herein.
By taking low-heat value gas is blast furnace gas as an example, on the gas fired-boiler using existing fuel gas burner structure, boiler
Original NOx discharge is usually 60~100mg/Nm3, it is unable to reach the requirement of ultra-clean discharge, it is necessary to additionally increase out of stock device,
Considerably increase the construction cost and later period operating cost at project initial stage.And it is adopted on the other blast furnace gas gas fired-boiler of ad eundem
With the utility model fuel gas burner structure, the practical NOx discharge of boiler can be reduced to 30~50mg/Nm3, meet ultra-clean discharge
It is required that the construction cost and later period operating cost of project can be reduced without configuring out of stock equipment.Using the utility model fuel gas buring
Device, because burner stable combustion ability is strong and adjusts than greatly, being suitable for gas fired-boiler because being influenced to lead to boiler load by upper flow device
Change biggish operating condition.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (9)
1. a kind of low NO of low-heat value gasXEmission combustor, it is characterised in that: including gas inlet system, air inlet system and igniting
System, the gas inlet system include low-heat value gas channel, and the air inlet system includes level-one wind system, light breeze system
System, three-level wind system, are sequentially distributed to burner hearth along low-heat value gas channel since gas inlet direction；The level-one wind system
Setting in low-heat value gas channel, the inlet of level-one wind system is provided with damper；The second level wind system arrangement
On the outside of low-heat value gas channel, the three-level wind system is distributed on the outside of second level wind system, is arranged using multiple gun annular, described
Second level wind system and force 3 wind system entry are provided with air quantity controllable register；The ignition system includes being arranged in level-one wind system
Channel in ignition air gun casing and ignition air gun casing in ignition air gun.
2. the low NO of low-heat value gas according to claim 1XEmission combustor, it is characterised in that: the level-one wind system
In channel, it is closely additionally provided with high energy ignition unit at ignition air gun casing, high energy point is provided with outside the high energy ignition unit
Fiery device casing.
3. the low NO of low-heat value gas according to claim 1XEmission combustor, it is characterised in that: the burner is also set up
There is fire inspection casing, flame detector is installed in fire inspection casing.
4. the low NO of low-heat value gas according to claim 1XEmission combustor, it is characterised in that: the second level wind system
Entrance is provided with a linkage air quantity controllable register.
5. the low NO of low-heat value gas according to claim 4XEmission combustor, it is characterised in that: the three-level wind system
Entrance air quantity controllable register is independent, and is parallel to linkage air quantity controllable register.
6. the low NO of low-heat value gas according to claim 1XEmission combustor, it is characterised in that: the level-one wind system,
Second level wind system and low-heat value gas channel exit are provided with swirl vane.
7. the low NO of low-heat value gas according to claim 6XEmission combustor, it is characterised in that: the low-heat value gas is logical
The entrance that road enters burner hearth is provided with two layers of swirl vane.
8. the low NO of low-heat value gas according to claim 1-7XEmission combustor, it is characterised in that: the igniting
The channel middle position of level-one wind system is arranged in air gun.
9. the low NO of low-heat value gas according to claim 1-7XEmission combustor, it is characterised in that: the level-one
Wind system, low-heat value gas channel, second level wind system and three-level wind system the muzzle for exporting to ignition air gun horizontal distance
It is sequentially increased according to the order of level-one wind system, low-heat value gas channel, second level wind system, three-level wind system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821924785.1U CN209484598U (en) | 2018-11-20 | 2018-11-20 | A kind of low-heat value gas low NOx drainage burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821924785.1U CN209484598U (en) | 2018-11-20 | 2018-11-20 | A kind of low-heat value gas low NOx drainage burner |
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| CN209484598U true CN209484598U (en) | 2019-10-11 |
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| CN201821924785.1U Active CN209484598U (en) | 2018-11-20 | 2018-11-20 | A kind of low-heat value gas low NOx drainage burner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121005A (en) * | 2019-12-02 | 2020-05-08 | 中国科学院过程工程研究所 | Decoupling gas burner and using method thereof |
| CN112050209A (en) * | 2020-09-08 | 2020-12-08 | 合肥依科普工业设备有限公司 | Forced air cooling full-oxygen multi-stage burner |
| CN113587089A (en) * | 2021-07-16 | 2021-11-02 | 浙江斯特利热能设备制造有限公司 | Air staged burner |
-
2018
- 2018-11-20 CN CN201821924785.1U patent/CN209484598U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121005A (en) * | 2019-12-02 | 2020-05-08 | 中国科学院过程工程研究所 | Decoupling gas burner and using method thereof |
| CN111121005B (en) * | 2019-12-02 | 2021-04-09 | 中国科学院过程工程研究所 | Decoupling gas burner and using method thereof |
| CN112050209A (en) * | 2020-09-08 | 2020-12-08 | 合肥依科普工业设备有限公司 | Forced air cooling full-oxygen multi-stage burner |
| CN113587089A (en) * | 2021-07-16 | 2021-11-02 | 浙江斯特利热能设备制造有限公司 | Air staged burner |
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