CN204901756U - Partly mix low NOx burner in advance - Google Patents
Partly mix low NOx burner in advance Download PDFInfo
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- CN204901756U CN204901756U CN201520619433.5U CN201520619433U CN204901756U CN 204901756 U CN204901756 U CN 204901756U CN 201520619433 U CN201520619433 U CN 201520619433U CN 204901756 U CN204901756 U CN 204901756U
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Abstract
The embodiment of the utility model discloses partly mix low NOx burner in advance. This partly mix low NOx burner in advance includes: urceolus (1), inner tube (2), the cover is established in urceolus (1) to and form disperse wind passageway between urceolus (1), disperse wind passageway has disperse wind import (9), disperse gas spray tube (3) sets up in disperse wind passageway, has disperse gas import (5), the gas mixes spray tube (6) in advance, and the cover is established in inner tube (2), blender (7) set up the exit end that mixes spray tube (6) in the gas in advance, disperse wind import (9) and disperse gas import (5) all set up is being close to the one end that the gas mixed the import of spray tube (6) in advance, and the export of disperse wind passageway and disperse gas spray tube (3) all sets up is being close to the one end that the gas mixed the export of spray tube (6) in advance. According to the utility model discloses a partly mix low NOx burner in advance, simple structure, the operation is stable and can reduce nitrogen oxide by a wide margin.
Description
Technical field
The utility model relates to technical field of combustion equipment, particularly relates to a kind of one half premix low NO for Industrial Boiler and all similar pressure-fireds or tiny structure combustion chamber.
Background technology
In recent years, the each big city of China is all subject to having a strong impact on of haze, its high thrust produced, it is exactly a large amount of industrial burner work produced pollution things, wherein nitrogen oxide and other pollutants will produce photochemical pollution under certain condition, produce huge threat to environment for human survival, this makes low-NO_x combustion technology become domestic and international primary study problem.
The low-NO_x combustion technology of present stage mainly comprises the technology such as grading combustion technology, flue gas recirculating technique, catalytic combustion technology and flameless combustion.The problem that its core solves reduces burner hearth flame temperature peak, thus reduce the generation of thermal NO x, reaches the object reducing discharged nitrous oxides; Or the nitrogen oxide in catalytic reduction tail gas, to reduce its discharge.
The problems such as the low nitrogen combustion apparatus of current existence has positive effect in reduction NOx emission, but there is complex structure, unstable in high expensive, running, energy consumption is high and safety coefficient is low.
Utility model content
It is simple, stable and significantly can reduce the burner of nitrogen oxide that the utility model embodiment provides a kind of structure.
In order to solve the problem, the utility model embodiment discloses a kind of half premix low NO, comprising: urceolus; Inner core, is set in urceolus, and and between urceolus, form disperse wind passage, disperse wind passage has disperse wind inlet; Disperse exhaust gas nozzle, is arranged in disperse wind passage, has disperse fuel gas inlet; Gas premixing jet pipe, is set in inner core; Blender, is arranged on the port of export of gas premixing jet pipe; Disperse wind inlet and disperse fuel gas inlet are all arranged on one end of the import near gas premixing jet pipe, and the outlet of disperse wind passage and disperse exhaust gas nozzle is all arranged on one end of the outlet near gas premixing jet pipe.
Alternatively, multiple disperse exhaust gas nozzle is uniformly distributed along the circumference of disperse wind passage.
Alternatively, the outlet of disperse wind passage is provided with ventilation terminal, ventilation terminal is provided with disperse wind nozzle, and disperse exhaust gas nozzle is arranged in disperse wind nozzle.
Alternatively, disperse wind nozzle is horn mouth.
Alternatively, disperse wind nozzle is arranged around the Central Symmetry of inner core.
Alternatively, inner core is also provided with spark arrester, and spark arrester is positioned at the end outlet place of inner core, the outlet of disperse wind passage and disperse exhaust gas nozzle by spark arrester and blender isolated.
Alternatively, disperse exhaust gas nozzle comprises inducer and transportation section, and inducer is arranged along the radial direction of inner core, and transportation section is arranged along the axis of inner core, passes through screwed connection between inducer and transportation section.
Alternatively, disperse wind inlet flushes with the entrance point end of urceolus, and disperse wind inlet respectively with urceolus and inner core tangent.
Alternatively, the outlet diameter of disperse wind nozzle is 3.3 to 3.6 times of the diameter of disperse exhaust gas nozzle.
Alternatively, blender is turbofan type.
Alternatively, outer barrel diameter is 2 to 3 times of inner diameter of steel flue.
Alternatively, each disperse exhaust gas nozzle is provided with the control valve controlling this disperse exhaust gas nozzle and open and close.
The utility model has following beneficial effect:
1. the utility model structure is simple, just can realize flue gas recirculation without the need to adding external pipe, is easy to realize and cost is low.2. the utility model can under dispersed combustion, premixed combustion and two kinds of simultaneous three kinds of fired states of situation steady operation, combustion gas applicatory is extensive.3. the utility model reduced oxygen quotient, decreased energy loss.4. high-speed jet of the present utility model significantly can to entrainment in burner hearth flue gas in order to diluting reaction thing, thus make flame spread major part burner hearth, peak flame temperature is made to be reduced to less than 1200 °, thus reduce the generation of nitrogen oxide, discharged nitrous oxides is lower than 10ppm (O23%), flue gas remaining oxygen is lower than 2%, and the CO in flue gas is almost nil, effectively solves the very big drawback of existing traditional combustion mode.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred embodiment, and is not thought restriction of the present utility model.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is half premix low NO structural representation of the present utility model;
Fig. 2 is the view of Fig. 1 along A-A direction;
Fig. 3 is the sectional view of Fig. 1 along B-B direction;
Fig. 4 is the left view of Fig. 1.
Description of reference numerals: 1, urceolus; 2, inner core; 3, disperse exhaust gas nozzle; 4, spark arrester; 5, disperse fuel gas inlet; 6, gas premixing jet pipe; 7, blender; 8, ventilation terminal; 9, disperse wind inlet.
Detailed description of the invention
Hereinafter also describe the utility model in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
See shown in Fig. 1 to Fig. 4, according to embodiment of the present utility model, half premix low NO comprises: urceolus 1; Inner core 2, is set in urceolus 1, and and between urceolus 1, form disperse wind passage, disperse wind passage has disperse wind inlet 9; Disperse exhaust gas nozzle 3, is arranged in disperse wind passage, has disperse fuel gas inlet 5; Gas premixing jet pipe 6, is set in inner core 2; Blender 7, is arranged on the port of export of gas premixing jet pipe 6; Disperse wind inlet 9 and disperse fuel gas inlet 5 are all arranged on one end of the import near gas premixing jet pipe 6, and the outlet of disperse wind passage and disperse exhaust gas nozzle 3 is all arranged on one end of the outlet near gas premixing jet pipe 6.
Urceolus 1 is fixed on the exterior wall of combustion chamber by flange; Inner core 2 and urceolus 1 central shaft coordinate double-barrel structure inside and outside consistent formation, and inner side is pre-mixed air passage; Outside is disperse wind passage, and entrance point and disperse wind inlet 9 are tightly connected.
When this burner operation, by disperse wind passage, disperse wind can be transported to combustion chamber place, disperse combustion gas is transported to combustion chamber place by disperse exhaust gas nozzle 3, pre-mixing gas combustion is transported in combustion chamber by gas premixing jet pipe 6, then by ignitor ignition trigger; Increase gradually and enter the air output of disperse wind inlet 9 and the throughput of disperse fuel gas inlet, gas premixing jet pipe 6 and pre-mixed air import is opened after flame stabilization, burner centre is made to carry out premixed combustion, the intake of further increase combustion gas and combustion air reaches design power, burner is made to enter half premixed combustion state at a high speed, thus keep the stable of burner, and significantly reduce nitrogen oxide.This burner structure is simple, just can realize flue gas recirculation without the need to adding external pipe, is easy to realize and cost is low.
And burner of the present utility model, can under dispersed combustion, premixed combustion and two kinds of simultaneous three kinds of fired states of situation steady operation, combustion gas applicatory is extensive.
Multiple disperse exhaust gas nozzle 3 is uniformly distributed along the circumference of disperse wind passage, can ensure that the disperse combustion gas being delivered to combustion chamber by disperse exhaust gas nozzle 3 is evenly distributed, and improves the efficiency of combustion of disperse combustion gas.
The outlet of disperse wind passage is provided with ventilation terminal 8, ventilation terminal 8 is provided with disperse wind nozzle, and disperse exhaust gas nozzle 3 is arranged in disperse wind nozzle.Preferably, disperse wind nozzle is horn mouth.Have several iiared port outside ventilation terminal 8 as disperse wind nozzle, ventilation terminal central opening, size and inner core major diameter fit, be arranged on burner end, composition dispersed combustion structure, and the disperse wind nozzle of broadening formation decreases the pressure loss, reduces energy consumption.
Disperse wind nozzle is arranged around the Central Symmetry of inner core 2, and when disperse wind can be made to spray from disperse wind nozzle, the distribution in combustion chamber is more even, more abundant with the burning of disperse combustion gas.
Inner core 2 is also provided with spark arrester 4, and spark arrester 4 is positioned at the end outlet place of inner core 2, and the outlet of disperse wind passage and disperse exhaust gas nozzle 3 is isolated by spark arrester 4 and blender 7.Spark arrester 4 effectively can prevent premixed combustion generation tempering, improves safety and reliability during burner combustion.
Ventilation terminal 8 and spark arrester 4 all adopt refractory material to make, and the part being conducive to preventing ventilation terminal 8 and spark arrester 4 to be positioned at burner hearth is burned, and improve the durability of ventilation terminal 8 and spark arrester 4.
Disperse exhaust gas nozzle 3 comprises inducer and transportation section, and inducer is arranged along the radial direction of inner core 2, and transportation section is arranged along the axis of inner core 2, passes through screwed connection between inducer and transportation section.This mode makes the processing technology of disperse exhaust gas nozzle 3 more simplify, and processing cost and difficulty of processing reduce, and also make the installation between inducer and transportation section, dismounting, maintenance and replacing more simple and convenient.
Disperse wind inlet 9 flushes with the entrance point end of urceolus 1, and disperse wind inlet 9 respectively with urceolus 1 and inner core 2 tangent.Preferably, the angle between the central axis of disperse wind entrance and urceolus 1 is 90 degree.Disperse wind inlet 9 flushes with the entrance point end of urceolus 1, disperse wind is made to enter in disperse wind passage from disperse wind inlet 9 more easily, and disperse wind can not be made to shunt in disperse wind passage, disperse wind inlet 9 respectively with urceolus 1 and inner core 2 tangent, and the angle between the central axis of disperse wind entrance and urceolus 1 is 90 degree, make the combustion air entering disperse wind passage more effectively can form eddy flow, thus mixing of combustion air and combustion gas can be accelerated, improve the mixing efficiency of combustion air and combustion gas.
The outlet diameter of disperse wind nozzle is 3.3 to 3.6 times of the diameter of disperse exhaust gas nozzle 3, makes oxygen quotient remain between 1.1-1.3, and both can ensure the Thorough combustion of combustion gas, again reduce energy consumption.
Blender 7 is turbofan type, pre-mixed air can be made to form eddy flow, can improve the premixing effect of pre-mixed air, and then improve the combustion efficiency after pre-mixed air and disperse wind and disperse combustion gas mixing, further the generation of reduction nitrogen oxide.
Urceolus 1 diameter is 2 to 3 times of inner core 2 diameter, makes premixed combustion account for more than 60% of whole combustion process, thus more effectively reduces the oxygen quotient excessively in combustion process, reduces the energy loss in combustion process.
Each disperse exhaust gas nozzle 3 is provided with the control valve controlling this disperse exhaust gas nozzle 3 and open and close, make each disperse exhaust gas nozzle 3 control it by independently control valve to open or close, the combustion power of burner can be adjusted, make burner go for the burning needs of different capacity requirement.
Disperse exhaust gas nozzle 3 is arranged around the Central Symmetry of inner core 2, when opening or close disperse exhaust gas nozzle 3, can open or be closed into the disperse exhaust gas nozzle 3 of symmetrical structure, thus remain that disperse exhaust gas nozzle 3 carries the uniformity of disperse combustion gas, ensure the combustibility of burner.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (12)
1. a half premix low NO, is characterized in that, comprising:
Urceolus (1);
Inner core (2), is set in described urceolus (1), and and form disperse wind passage between described urceolus (1), described disperse wind passage has disperse wind inlet (9);
Disperse exhaust gas nozzle (3), is arranged in described disperse wind passage, has disperse fuel gas inlet (5);
Gas premixing jet pipe (6), is set in described inner core (2);
Blender (7), is arranged on the port of export of described gas premixing jet pipe (6);
Described disperse wind inlet (9) and described disperse fuel gas inlet (5) are all arranged on one end of the import near described gas premixing jet pipe (6), and the outlet of described disperse wind passage and described disperse exhaust gas nozzle (3) is all arranged on one end of the outlet near described gas premixing jet pipe (6).
2. half premix low NO according to claim 1, is characterized in that, multiple disperse exhaust gas nozzle (3) is uniformly distributed along the circumference of described disperse wind passage.
3. half premix low NO according to claim 1, it is characterized in that, the outlet of described disperse wind passage is provided with ventilation terminal (8), described ventilation terminal (8) is provided with disperse wind nozzle, described disperse exhaust gas nozzle (3) is arranged in described disperse wind nozzle.
4. half premix low NO according to claim 3, is characterized in that, described disperse wind nozzle is horn mouth.
5. half premix low NO according to claim 4, is characterized in that, described disperse wind nozzle is arranged around the Central Symmetry of described inner core (2).
6. half premix low NO according to claim 1, it is characterized in that, described inner core (2) is also provided with spark arrester (4), described spark arrester (4) is positioned at the end outlet place of described inner core (2), and the outlet of described disperse wind passage and described disperse exhaust gas nozzle (3) is isolated by described spark arrester (4) and described blender (7).
7. half premix low NO according to claim 1, it is characterized in that, described disperse exhaust gas nozzle (3) comprises inducer and transportation section, described inducer is arranged along the radial direction of described inner core (2), described transportation section is arranged along the axis of described inner core (2), passes through screwed connection between described inducer and described transportation section.
8. half premix low NO according to claim 1, it is characterized in that, described disperse wind inlet (9) flushes with the entrance point end of described urceolus (1), and described disperse wind inlet (9) respectively with described urceolus (1) and described inner core (2) tangent.
9. half premix low NO according to claim 3, is characterized in that, the outlet diameter of described disperse wind nozzle is 3.3 to 3.6 times of the diameter of described disperse exhaust gas nozzle (3).
10. half premix low NO according to claim 1, is characterized in that, described blender (7) is turbofan type.
11. half premix low NOs according to claim 1, is characterized in that, described urceolus (1) diameter is 2 to 3 times of described inner core (2) diameter.
12. half premix low NOs according to claim 2, is characterized in that, each described disperse exhaust gas nozzle (3) are provided with the control valve controlling this disperse exhaust gas nozzle (3) and open and close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520619433.5U CN204901756U (en) | 2015-08-17 | 2015-08-17 | Partly mix low NOx burner in advance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520619433.5U CN204901756U (en) | 2015-08-17 | 2015-08-17 | Partly mix low NOx burner in advance |
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| CN204901756U true CN204901756U (en) | 2015-12-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620961A (en) * | 2017-11-02 | 2018-01-23 | 上海华之邦科技股份有限公司 | The novel super-low nitrogen combustion apparatus that a kind of non-premixed combustion and premixed combustion are combined |
| CN108397772A (en) * | 2018-05-07 | 2018-08-14 | 上海全颉环境设备有限公司 | A kind of combustion head |
| CN111396871A (en) * | 2020-01-17 | 2020-07-10 | 华中科技大学 | Microminiature combustor with multistage passive air inlet function |
-
2015
- 2015-08-17 CN CN201520619433.5U patent/CN204901756U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107620961A (en) * | 2017-11-02 | 2018-01-23 | 上海华之邦科技股份有限公司 | The novel super-low nitrogen combustion apparatus that a kind of non-premixed combustion and premixed combustion are combined |
| CN108397772A (en) * | 2018-05-07 | 2018-08-14 | 上海全颉环境设备有限公司 | A kind of combustion head |
| CN111396871A (en) * | 2020-01-17 | 2020-07-10 | 华中科技大学 | Microminiature combustor with multistage passive air inlet function |
| CN111396871B (en) * | 2020-01-17 | 2021-03-26 | 华中科技大学 | Microminiature combustor with multistage passive air inlet function |
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