CN208253585U - A kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type - Google Patents
A kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type Download PDFInfo
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- CN208253585U CN208253585U CN201820689820.XU CN201820689820U CN208253585U CN 208253585 U CN208253585 U CN 208253585U CN 201820689820 U CN201820689820 U CN 201820689820U CN 208253585 U CN208253585 U CN 208253585U
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- flue gas
- burner throat
- pipette tips
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Abstract
The utility model relates to a kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type, main body includes burner throat, central tube, flame holder or cyclone, includes that the combustion air channel in direct current wind channel and Whirl deposite tank channel and pipette tips stretch and set on the outside of burner throat, are above equipped with several interior gas guns and outer gas gun of spray orifice before several combustion gas, side spray hole and oblique spray orifice.When work, combustion gas passes through spray orifice before combustion gas, side spray hole and oblique spray orifice are classified diverging in different directions and spray, with the full and uniform mixed firinor fuel burning of combustion air, be conducive to improve the distributing homogeneity and degree of filling of flame, burn near pipette tips formation relatively high super pressure-high temperature flue gas can upstream compared with low pressure combustion air suction volume under be back to combustion air area, it is mixed to form the combustion air for reducing oxygen content, flame uniform combustion after participation, realization reaches in the case where not increasing any cigarette and following facility to be recycled in the flue gas of flue gas outside circulation equivalent efficacy, it is simple and reasonable and at low cost, it is a big innovation in low NOx combustion apparatus field.
Description
Technical field
The utility model relates to Industrial Boiler emission-reducing device technical field, especially a kind of flue gas classification internal-circulation type is low
NOx high heating value gas combustion apparatus.
Background technique
With continuing to increase for national environmental protection management in recent years, for the NOx emission environmental protection standard day of gas fired-boiler
Become to receiving sternly, industry is trying to explore low-NO_x combustion technology, transformation gas fired-boiler thus and all.At present in high heating value natural gas boiler
Low-nitrogen discharged aspect, it has been proposed that NOx emission value is down to 30mg/Nm3Target call.In practice, it has been found that transformation combustion gas
When boiler, in addition to needing replacing using low NO, also need to be aided with the flue gas outer circulation that can reduce ignition temperature and oxygen content
Combustion technology, the two, which combines, can be only achieved 30mg/Nm3.The basic structure of presently used neat gas burner as shown in Figure 1,
Include the burner throat 1 for being equipped with front port 11, be arranged in the intraoral cyclone 2 of larynx, interior gas gun 3, outer gas gun 4
With combustion air air duct 5, wherein the pipette tips of cyclone 2 and interior gas gun 3 and outer gas gun 4 are arranged at burner throat 1
Nearby near 11 inside accent of port, in inner contracting shape.When work, combustion gas and combustion air are first in 1 front port 11 of burner throat
Inside accent be nearby mixed and burned, then jet out flames through aditus laryngis, into carrying out hierarchical segmented burning in burner hearth.Due to combustion gas
It has just been mixed and burned with combustion air before combustion gas sprays aditus laryngis, generated high-temperature flue gas, therefore easily generated a large amount of NOx.And it is auxiliary
After flue gas outer circulation combustion technology, can the low-temperature flue gas of boiler tail 10%-25% be directed to burner throat front and be helped
Air mixing is fired, the temperature and oxygen content therein of gaseous mixture is reduced, is re-fed into a pot chamber inner combustion, therefore advantageously reduces NOx's
Production quantity meets gas fired-boiler discharge compression ring and protects standard requirements.But it with the passage of application time, gradually has found in practice
Some U.S. shortcomings: one is since the low-temperature flue gas for participating in outer circulation needs to introduce burner throat from boiler tail
Front, needs to be arranged dedicated flue gas recirculation pipeline, cigarette mixes the indispensable cigarette such as case, recirculation blower and follows component, therefore structure phase
To more complicated, setup cost is higher；The second is being easy to generate condensed water, influencing the thermal efficiency since the temperature difference is larger.So from warp
Ji property and point of view of practicability consider, still owe ideal.
Summary of the invention
The purpose of this utility model is overcome present in low NO of the existing combination using flue gas outside circulation
Deficiency, provide it is a kind of can on the basis of ensuring NOx low emission, change flue gas recirculation mode, exempt to follow component, Ji Keshi with cigarette
Existing low cost NOx high heating value gas combustion apparatus low with the flue gas classification internal-circulation type for avoiding condensed water from generating.
The utility model is set about from the structure and its setting position for changing combustion gas pipette tips, and combustion gas pipette tips are stretched out and are arranged away from combustion
At a certain distance from burner aditus laryngis front port, make to follow within a large amount of high-temperature flue gas that combustion gas pipette tips near zone fractional combustion generates
The mode of ring is back to the low-temp low-pressure combustion air region near burner throat front port, mixed with combustion air,
Hypoxemia amount combustion air is formed, then the classification cycle burning after participating in, it is advantageously ensured that burner hearth flame is evenly distributed, reduction office
The generation probability of portion high-temperature region, and then ensure to reduce the production quantity of NOx.
A kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type of the utility model, main body includes combustion
Burner aditus laryngis, flame holder or cyclone, several interior gas guns, several outer gas guns and combustion air channel, it is characterised in that also wrap
Contain central tube and mounting bracket, in which:
The burner throat main body is cylindrical, is made of front port, rear port and barrel；
The mounting bracket is installed on the rear port of burner throat, is equipped with and central tube, interior gas gun
Limit installation corresponding with outer gas gun hole；
The central tube main body is in elongated cylindrical, is fixed on the intracavitary shaft core position of burner throat, before
End is close or maintains an equal level with the front port, and its rear end is installed in the fixed installation branch by corresponding limit installation hole
On frame；
The flame holder or cyclone body is in flat annulus shape or discoid, is fixed in being set in by its inner ring surface
On the nearby end anchor ring of heart cylinder；
The combustion air channel is filled the post of by the annular barrel chamber being located between central tube periphery and the barrel of burner throat,
It include the Whirl deposite tank channel by being constituted positioned at central tube periphery and the annular space between flame holder or cyclone inner ring surface, and
The direct current wind channel being made of the annular space between flame holder or cyclone outer ring surface and the barrel of burner throat；
The interior gas gun and outer gas gun are arranged by the way that hole is mounted accordingly and is fixedly mounted in fixed installation branch
Coaxial with each other, be laid in the direct current wind passage area according to the dislocation of diameter annular on frame, pipette tips top is relative to burner
The front port of aditus laryngis is in overhanging shape；
Be provided on demand on the pipette tips top end face of the interior gas gun it is several convenient for combustion gas towards the combustion sprayed in burner hearth
Spray orifice before gas is provided with several combustion gas side spray holes radially sprayed to axis direction convenient for combustion gas on pipette tips side on demand；
Be provided on demand on the pipette tips top end face of the outer gas gun it is several convenient for combustion gas to burner hearth peripheral direction taper
Dissipate the oblique spray orifice of combustion gas of injection；
In addition, the pipette tips of the interior gas gun and outer gas gun stretch out front port a certain distance of burner throat.
When work, combustion air is entered by combustion air channel, respectively from burner larynx in the form of Whirl deposite tank and direct current wind
Mouthful front port spray, the oblique spray orifice of combustion gas that combustion gas passes through spray orifice and outer gas gun before the combustion gas side spray hole of interior gas gun, combustion gas
Classification sprays；When combustion air burns with the combustion gas mixing sprayed from the pipette tips of interior gas gun and outer gas gun, near pipette tips
The relatively high high-temperature flue gas area of air pressure is formed, accordingly becomes relatively low combustion-supporting of air pressure near burner throat front port
Air zone makes the high-temperature flue gas generated near pipette tips be back to the combustion air area under the suction volume effect of draught head,
It mixed with the combustion air from Whirl deposite tank channel and direct current wind channel, form the Whirl deposite tank and direct current for having reduced oxygen content
Wind realizes circulation in flue gas；In addition, the radial combustion gas sprayed to axis direction first encounters from the combustion gas side spray hole of each interior gas gun
It reduced the Whirl deposite tank burning of oxygen content, formed flame of centre, penetrated ejection before axial direction from spray orifice before the combustion gas of interior gas gun
Cyclic annular intermediate combustion gas, meet with the direct current wind and Whirl deposite tank for having reduced oxygen content ignited after mixing by the flame of centre, shape
At middle part flame, the taper divergent shape direct projection combustion gas sprayed from the oblique spray orifice of combustion gas of outer gas gun and has reduced oxygen content
Direct current wind facies meet mixing after by the middle part flame ignition, is formed facilitate expansion flame diameter, ensure flame in burner hearth
The external flame of degree of filling；Flame of centre, middle part flame and external flame are successively laid out, and are evenly distributed, the generation office in burner hearth
The probability of portion high-temperature region is very low, so that it is guaranteed that reducing the production quantity of NOx.
The low NOx high heating value gas combustion apparatus of the utility model flue gas classification internal-circulation type based on above-mentioned design, due to
It by the overhanging setting of combustion gas pipette tips, is allowed to hold certain distance between the front port with burner throat, in combustion gas pipette tips when making work
It is formed about the high-temperature flue gas area of relatively high pressure, becomes relatively low pressure low temperature, near the front port of burner throat convenient for suction
The combustion air area of relatively high pressure high temperature gases recirculating is rolled up, and mixes combustion air therein with high-temperature flue gas, formed and dropped
The combustion air of low oxygen content, the low NOx combustion after participating in are realized and are followed in the flue gas when not increasing any cigarette and following facility
Ring reaches the equivalent efficacy of flue gas outer circulation；And due to reasonably constructing and being configured with inside and outside combustion gas pipette tips, allow combustion gas court
Different directions high speed ejection not only contributes to being sufficiently mixed for combustion gas and combustion air, while being also beneficial to reasonably to lay
Internal heat flame, middle part flame and external flame, it is ensured that burner hearth flame is evenly distributed and ensures degree of filling, reduces local high temperature zone
It generates probability and then ensures to reduce the production quantity of NOx.So the technical solution of the utility model is ensuring low NOx generation amount
Under the premise of realize circulation in flue gas, and reach in the case where not increasing any cigarette and following facility the equivalent efficacy of flue gas outer circulation,
Therefore effectively overcome present in the existing low NO using flue gas outside circulation that structure is complicated, setup cost is high and
It is easy the deficiency for generating condensed water, influencing the thermal efficiency, hence it is evident that have structure simple and scientific and reasonable, it is stable and reliable in work and practical
Substantive distinguishing features, be a big innovation in low NOx high heating value gas combustion apparatus field in fact, be that a kind of ideal update produces
Product.
Detailed description of the invention
Fig. 1 is existing low-NOx combustor basic structure schematic diagram relevant to the utility model；
Fig. 2 is the basic structure schematic diagram of the utility model embodiment；
Fig. 3 is the A-A cross-sectional view of Fig. 2；
Fig. 4 is the three dimensional structure diagram of the utility model embodiment.
In figure:
1. 11. front port of burner throat, 12. rear port, 13. barrel
2. 32. combustion gas side spray hole of spray orifice before 31. combustion gas of gas gun in flame holder or cyclone 3.
4. outer gas gun 41. oblique 5. combustion air channel of spray orifice, 51. Whirl deposite tank channel forward
52. hole is mounted in 6. central tube of direct current wind channel, 7. mounting bracket 71..
Specific embodiment
The utility model is described in further detail with exemplary embodiments with reference to the accompanying drawing.
In figs. 2,3 and 4, a kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type, main body include
There are burner throat 1, flame holder or cyclone 2, several interior gas guns 3, several outer gas guns 4 and combustion air channel 5, feature
It is also to include central tube 6 and mounting bracket 7, in which:
1 main body of burner throat is cylindrical, is made of front port 11, rear port 12 and barrel 13；
The mounting bracket 7 is installed on the rear port 12 of burner throat 1, is equipped with and central tube 6, internal combustion
Air gun 3 and the corresponding limit installation hole 71 of outer gas gun 4；
6 main body of central tube is in elongated cylindrical, is fixed on the intracavitary shaft core position of burner throat 1,
Front end is close or maintains an equal level with the front port 11, and its rear end is installed in the fixation by corresponding limit installation hole 71
In mounting bracket 7；
The flame holder or 2 main body of cyclone is in flat annulus shape or discoid, is set in by the fixation of its inner ring surface
On the nearby end anchor ring of central tube 6；
The combustion air channel 5 is by being located at the peripheral annular barrel chamber between the barrel 13 of burner throat 1 of central tube 6
Fill the post of, include the Whirl deposite tank channel 51 being made of the annular space being located between 6 periphery of central tube and 2 inner ring surface of cyclone,
The direct current wind channel 52 being made of the annular space between 2 outer ring surface of cyclone and the barrel 13 of burner throat 1 and；
The interior gas gun 3 and outer gas gun 4 is pacified by the way that hole 71 is mounted accordingly and is fixedly mounted to be arranged fixed
It fills on bracket 7, coaxial with each other, be laid in 52 region of direct current wind channel according to the dislocation of diameter annular, pipette tips top is opposite
In burner throat 1 front port 11 be in overhanging shape；
Be provided on demand on the pipette tips top end face of the interior gas gun 3 it is several convenient for combustion gas towards the combustion sprayed in burner hearth
Spray orifice 31 before gas are provided with several combustion gas side spray holes radially sprayed to axis direction convenient for combustion gas on pipette tips side on demand
32；
Be provided on demand on the pipette tips top end face of the outer gas gun 4 it is several convenient for combustion gas to burner hearth peripheral direction taper
Dissipate the oblique spray orifice 41 of combustion gas of injection；
In addition, the front port 11 that the pipette tips of the interior gas gun 3 and outer gas gun 4 stretch out burner throat 1 is certain
Distance.
When work, combustion air is entered by combustion air channel 5, respectively from burner larynx in the form of Whirl deposite tank and direct current wind
Mouthful 1 front port 11 sprays, the combustion that combustion gas passes through spray orifice 31 and outer gas gun 4 before the combustion gas side spray hole 32 of interior gas gun 3, combustion gas
The oblique classification of spray orifice 41 of gas sprays；Combustion air burns with the combustion gas mixing sprayed from the pipette tips of interior gas gun 3 and outer gas gun 4
When, it is formed about the relatively high high-temperature flue gas area of air pressure in pipette tips, accordingly becomes gas near 1 front port 11 of burner throat
Relatively low combustion air area is pressed, the high-temperature flue gas generated near pipette tips is made to be back to institute under the suction volume effect of draught head
The combustion air area stated mixes with the combustion air from Whirl deposite tank channel 51 and direct current wind channel 52, is formed to have reduced and contain
The Whirl deposite tank and direct current wind of oxygen amount realize circulation in flue gas；In addition, radial to axis from the combustion gas side spray hole of each interior gas gun 3 32
The combustion gas that heart direction sprays, which first encounters, have been reduced the Whirl deposite tank burning of oxygen content, has formed flame of centre, from the combustion gas of interior gas gun 3
Preceding spray orifice 31 penetrates the intermediate combustion gas of ring-type of ejection before axial direction, meets after mixing with the direct current wind and Whirl deposite tank for having reduced oxygen content
It ignited by the flame of centre, form middle part flame, the taper divergent shape sprayed from the oblique spray orifice 41 of combustion gas of outer gas gun 4
Direct projection combustion gas meets after mixing by the middle part flame ignition with the direct current wind facies for having reduced oxygen content, is formed and help to expand
Flame diameter, the external flame for ensuring flame degree of filling in burner hearth；Flame of centre, middle part flame and external flame successively cloth
Office, is evenly distributed, and the probability that local high temperature zone is generated in burner hearth is very low, so that it is guaranteed that reducing the production quantity of NOx.
Claims (1)
1. a kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type, main body includes burner throat (1), steady
Flame device or cyclone (2), several interior gas guns (3), several outer gas guns (4) and combustion air channel (5), it is characterised in that also wrap
Contain central tube (6) and mounting bracket (7), in which:
Described burner throat (1) main body is cylindrical, is made of front port (11), rear port (12) and barrel (13)；
The mounting bracket (7) is installed on the rear port (12) of burner throat (1), be equipped with central tube (6),
Interior gas gun (3) and the corresponding limit installation hole (71) of outer gas gun (4)；
Central tube (6) main body is in elongated cylindrical, is fixed on burner throat (1) intracavitary shaft core position,
Front end is close or maintains an equal level with the front port (11), and its rear end is installed in described by corresponding limit installation hole (71)
On mounting bracket (7)；
The flame holder or cyclone (2) main body are in flat annulus shape or discoid, are fixed in being set in by its inner ring surface
On the nearby end anchor ring of heart cylinder (6)；
The combustion air channel (5) is by being located at central tube (6) peripheral annular between the barrel (13) of burner throat (1)
Barrel chamber is filled the post of, and includes to be constituted by being located at central tube (6) periphery and the annular space between flame holder or cyclone (2) inner ring surface
Whirl deposite tank channel (51), and by between flame holder or cyclone (2) outer ring surface and the barrel (13) of burner throat (1)
Annular space constitute direct current wind channel (52)；
The interior gas gun (3) and outer gas gun (4) is arranged by the way that hole (71) are mounted accordingly and are fixedly mounted in fixation
It is coaxial with each other, be laid in described direct current wind channel (52) region according to the dislocation of diameter annular, pipette tips top in mounting bracket (7)
Holding the front port (11) relative to burner throat (1) is in overhanging shape；
Be provided on demand on the pipette tips top end face of the interior gas gun (3) it is several convenient for combustion gas towards the combustion gas sprayed in burner hearth
Preceding spray orifice (31) is provided with several combustion gas side spray holes radially sprayed to axis direction convenient for combustion gas on pipette tips side on demand
(32)；
Be provided on demand on the pipette tips top end face of the outer gas gun (4) it is several convenient for combustion gas to burner hearth peripheral direction taper send out
Dissipate the oblique spray orifice of combustion gas (41) of injection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820689820.XU CN208253585U (en) | 2018-05-10 | 2018-05-10 | A kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820689820.XU CN208253585U (en) | 2018-05-10 | 2018-05-10 | A kind of low NOx high heating value gas combustion apparatus of flue gas classification internal-circulation type |
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| CN208253585U true CN208253585U (en) | 2018-12-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109751600A (en) * | 2019-03-07 | 2019-05-14 | 上海华之邦科技股份有限公司 | A kind of fuel gas combustion system of multitubular boiler |
| CN114234187A (en) * | 2021-12-27 | 2022-03-25 | 北京瑞晨航宇能源科技有限公司 | High-speed low-nitrogen combustor for heating furnace and combustion method thereof |
-
2018
- 2018-05-10 CN CN201820689820.XU patent/CN208253585U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109751600A (en) * | 2019-03-07 | 2019-05-14 | 上海华之邦科技股份有限公司 | A kind of fuel gas combustion system of multitubular boiler |
| CN114234187A (en) * | 2021-12-27 | 2022-03-25 | 北京瑞晨航宇能源科技有限公司 | High-speed low-nitrogen combustor for heating furnace and combustion method thereof |
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