CN105465786A - Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases - Google Patents
Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases Download PDFInfo
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- CN105465786A CN105465786A CN201510893153.8A CN201510893153A CN105465786A CN 105465786 A CN105465786 A CN 105465786A CN 201510893153 A CN201510893153 A CN 201510893153A CN 105465786 A CN105465786 A CN 105465786A
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- Prior art keywords
- low
- combustion
- combustion air
- gas
- nox
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Classifications
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- 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
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
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- 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
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
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- 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
- F23D2900/14002—Special features of gas burners of premix or non premix types, specially adapted for the combustion of low heating value [LHV] gas
Abstract
The invention belongs to the technical field of industrial combustors, and discloses a low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases for solving the technical problem about how to further reduce the NOx emission of combustors. The low-NOx combustor is characterized in that a center air pipe, an inner pipe, an outer pipe, an outer sleeve and a throat are sequentially and coaxially arranged from inside to outside; a first combustion air channel is formed between the center air pipe and the inner pipe, and the upper end of the first combustion air channel is fixedly connected with a first swirler; a fuel gas channel is formed between the inner pipe and the outer pipe, and the upper end of the fuel gas channel is provided with a plurality of inward center fuel gas nozzles and a plurality of outward center fuel gas nozzles in a circular-ring uniform distribution manner; a second combustion air channel is formed between the outer pipe and the outer sleeve, and the end of the second combustion air channel is fixedly connected with a second swirler; and a third combustion air channel is formed between the outer sleeve and the throat. By the combination of a dense-dilute combustion method and a staged combustion manner, flames can be relatively stable, the intensity of dense combustion is improved, and an extremely strong reduction atmosphere is formed for restraining NOx generation. The low-NOx combustor is suitable for various low-heat-value/low-pressure fuel gases.
Description
Technical field
The present invention relates to industrial tail gas, waste gas burning technology, particularly relate to the industrial tail gas of lower heat of combustion/low supply gas pressure, the boiler of waste gas, heating furnace, belong to industrial gas burner field of combustion technology.
Background technology
Along with national energy-saving reduces discharging going deep into further of policy, and people are formed for NOx and the understanding of harm, for the discharge reducing NOx, arrive instant stage, the field related to not only has been confined to the denitration of north heating, Industrial Boiler, power boiler, especially the requirement reducing NOx emission be targeted by industrial waste gas, industrial by-product gas etc.And these industrial waste gases generally all also exist, and supply gas pressure is low, calorific value is low, nitrogen content high.When burning these industrial waste gases, the NOx produced is not only heating power type (NOx produces and depends on temperature height), but also relate to fuel type NOx(NOx produce depend on leaded wastewater in fuel), so, technical in reduction NOx emission, the burner of these industrial waste gases that burn has larger difference with traditional gas-firing burner.When using this type of industrial waste gas, because its calorific value is lower, generally lower than 4000Kcal/Nm
3, the peak temperature of flame is many below 1500 degree, and the ratio shared by thermal NO x own is less, and some waste gas is as blast furnace gas and carbon black tail gas calorific value only 700Kcal/Nm
3, ignition temperature is less than 1200 degree; And due to containing this certain proportion of nitrogen compound in waste gas, at a lower temperature, as easy as rolling off a logly generate NOx with combination with oxygen, i.e. fuel type NOx.Less for the NOx emission technical research reducing this kind of burner at home, also rarely have report in the world.
Summary of the invention
The object of the invention is the defect for existing in prior art, a kind of low-NOx combustor being suitable for various low heat value/low-pressure combustion gas is provided, reduce the NOx emission of lower heat of combustion/low supply gas pressure industrial gas burner further.
In order to achieve the above object, the technical scheme of employing is: a kind of low-NOx combustor being suitable for various low heat value/low-pressure combustion gas, comprises central air hose, blast tube, combustion air passage, aditus laryngis, cyclone and gas nozzle, it is characterized in that; Described central air hose, interior pipe, outer tube, outer tube, aditus laryngis are circular, coaxially arrange successively from inside to outside; Be the first combustion air passage between described central air hose and described interior pipe, its upper end and the first cyclone are fixedly connected; Be blast tube between described interior pipe and described outer tube, the upper end of described blast tube is equipped with multiple centers gas nozzle and outside gas nozzle, in circular uniform configuration; Be the second combustion air passage between described outer tube and described outer tube, its end and the second cyclone are fixedly connected; It is the 3rd combustion air passage between described outer tube and described aditus laryngis.
Gas nozzle fuel gas injection direction, described center tilts to central axis, and the gas quantity of ejection is 10 ~ 25% of total gas quantity.
Described outside gas nozzle is placed in the outside of described center gas nozzle, and with different radii configuration 1 ~ 3 circle, at least uniform configuration 1 is enclosed, injection direction displaced central axis alignment outer incline.
The invention has the beneficial effects as follows: bias combustion methods combining of the present invention fractional combustion mode, makes flame relatively stable, improve the intensity of dense burning, define extremely strong reduction atmosphere; And dense combustion zone and the classification of light combustion zone connect each other again, the smoke backflow that light burning produces, to dense combustion zone, inhibits NOx to produce under a reducing atmosphere.Namely at dense combustion zone (oxygen-rich area), mainly the flame kernel area configurations of the fuel that sprays of center gas nozzle and the mixing of the first combustion air passage combustion air has more fuel and anoxic, and severe depletion of oxygen, so just a large amount of reducing atmospheres and reducing substances can be produced, as CO, HCN etc., suppress the generation of fuel type NOx.The present invention is applicable to the burner using various low heat value/low-pressure combustion gas.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional structure schematic diagram of burner of the low NOx of industrial combustion gas of the present invention;
Fig. 2 is that the A of Fig. 1 is to structural representation.
In figure, 1-centre wind; 2-the first combustion air passage; 3-blast tube; 4-the second combustion air passage; 5-the three combustion air passage; 6-center gas nozzle; 7-outwards gas nozzle; 8-the first cyclone; 9-aditus laryngis; 10-the second cyclone; 11-interior pipe; 12-outer tube; 13-central air hose; 14-outer tube.
Detailed description of the invention
Illustrate below in conjunction with accompanying drawing and embodiments of the invention are further described, its objective is to make those skilled in the art can understand and implement the present invention, being not intended to limit the invention.Should be appreciated that protection scope of the present invention is as the criterion with claims, every employing is with analog structure of the present invention or be equal to alternative, all should list protection scope of the present invention in.Following pause mark all represent and relation.
Fig. 1 is the longitudinal sectional structure schematic diagram of burner of the low NOx of industrial combustion gas of the present invention; Fig. 2 is that the A of Fig. 1 is to structural representation.Shown in Fig. 1 and Fig. 2, a kind of low-NOx combustor being suitable for various low heat value/low-pressure combustion gas of the present invention, comprises central air hose 13, blast tube 3, combustion air passage, aditus laryngis 9, cyclone and gas nozzle, it is characterized in that; Described central air hose 13, interior pipe 11, outer tube 12, outer tube 14, aditus laryngis 9, in circular, are coaxially arranged from inside to outside successively; Be the first combustion air passage 2 between described central air hose 13 and described interior pipe 11, its upper end and the first cyclone 8 are fixedly connected; Be blast tube 3 between described interior pipe 11 and outer tube 12, the upper end of blast tube 3 is equipped with multiple centers gas nozzle 6 and multiple outside gas nozzle 7, in circular uniform configuration; Be the second combustion air passage 4 between described outer tube 12 and described outer tube 14, its upper end and the second cyclone 10 are fixedly connected; Be the 3rd combustion air passage 5 outside described outer tube 14 and between described aditus laryngis 9, the 3rd combustion air through the 3rd combustion air passage 5 is direct current wind.
Described center gas nozzle 6 injection direction tilts (α/2 jiao, 30 ° < α < 90 °) to central axis, and the gas quantity of ejection is 10 ~ 25% of total gas quantity; As shown in Figure 1, described first combustion air passage 2 combustion air, flowing out as rotary wind after the first cyclone 8 in interior pipe 11, carries out liquidating mixing with the combustion gas sprayed by described center gas nozzle 6.Because this place's gas quantity is many, the first combustion air (accounting for 3 ~ 11% of total air) is relatively few, and combustion gas imperfect combustion, i.e. anoxycausis, so define stronger reduction atmosphere; In addition, because the flow velocity of the first combustion air is herein lower, so can negative relative be formed, attract the smoke backflow of outside to burn under this reproducibility atmosphere, thus reduce NOx emission.
Described outside gas nozzle 7 is placed in the outside of described center gas nozzle 6, and at least uniform configuration 1 is enclosed, and can enclose according to watt level by the uniform configuration 1 ~ 3 of different radii.The combustion gas that described outside gas nozzle 7 sprays is sprayed outwardly, injection direction displaced central axis alignment outer incline (β/2 jiao, 90 ° < β < 160 °).Combustion air in second combustion air passage 4 rotates outflow after the second cyclone 10, and the combustion gas sprayed with described outside gas nozzle 7 is carried out liquidating mixing.Direct current wind through the 3rd combustion air passage 5 the 3rd combustion air.Because the second combustion air 4 is relative plentiful with the 3rd combustion air 5, while combustion-supporting, also serve cooling effect, define light burning, reduce flame temperature.Carry out liquidating mixing with the rotary wind of the second combustion air 4 from the second cyclone 10.In addition, according to the needs of combustion chamber size, the ratio between the second combustion air 4 and the 3rd combustion air 5 can be adjusted.The intensity of direct current wind and Whirl deposite tank can be changed, thus length and the diameter of flame can be adjusted.
The present invention is directed to thermal NO x, adopt staged-combustion method, more than three grades transmission & distribution are all divided into by fuel and air, in inside, multiple centers gas nozzle sprays center fuel inwardly, all the other two or three grades of fuel are sprayed outwardly by multiple outside gas nozzle, first combustion air 2 is carried with cyclonic form in central area, and the second combustion air 4 is outer with Whirl deposite tank transmission & distribution at fuel gun, and the 3rd combustion air 5 is outer with direct current wind form transmission & distribution at Whirl deposite tank.Such flame that can make is relatively stable, and flame occurs that the region that peak temperature is high is reduced relatively; For fuel type NOx, fuel type NOx is reduced with the method for bias combustion, at dense combustion zone (oxygen-rich area), the mainly more fuel of flame kernel area configurations of center fuel and the mixing of the first combustion air 2 and anoxic, and severe depletion of oxygen, so just can produce a large amount of reducing atmospheres and material, as CO, HCN etc., these reducing substanceses can suppress the generation of fuel type NOx.
Claims (3)
1. be suitable for a low-NOx combustor for various low heat value/low-pressure combustion gas, comprise central air hose, blast tube, combustion air passage, aditus laryngis, cyclone and gas nozzle, it is characterized in that; Described central air hose, interior pipe, outer tube, outer tube, aditus laryngis are circular, coaxially arrange successively from inside to outside; Be the first combustion air passage between described central air hose and described interior pipe, its upper end and the first cyclone are fixedly connected; Be blast tube between described interior pipe and described outer tube, the upper end of described blast tube is equipped with multiple centers gas nozzle and multiple outside gas nozzle, in circular uniform configuration; Be the second combustion air passage between described outer tube and described outer tube, its end and the second cyclone are fixedly connected; It is the 3rd combustion air passage between described outer tube and described aditus laryngis.
2. a kind of low-NOx combustor being suitable for various low heat value/low-pressure combustion gas according to claim 1, is characterized in that; Gas nozzle fuel gas injection direction, described center tilts to central axis, and the gas quantity of ejection is 10 ~ 25% of total gas quantity.
3. a kind of low-NOx combustor being suitable for various low heat value/low-pressure combustion gas according to claim 1, is characterized in that; Described outside gas nozzle is placed in the outside of described center gas nozzle, and with different radii configuration 1 ~ 3 circle, at least uniform configuration 1 is enclosed, injection direction displaced central axis alignment outer incline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510893153.8A CN105465786A (en) | 2015-12-08 | 2015-12-08 | Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510893153.8A CN105465786A (en) | 2015-12-08 | 2015-12-08 | Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases |
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| CN105465786A true CN105465786A (en) | 2016-04-06 |
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| CN201510893153.8A Pending CN105465786A (en) | 2015-12-08 | 2015-12-08 | Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218602A (en) * | 2017-07-19 | 2017-09-29 | 上海华之邦科技股份有限公司 | A kind of low heat value/low-pressure gas burner |
| CN108895447A (en) * | 2018-04-17 | 2018-11-27 | 广东技术师范学院天河学院 | Gas gun |
| CN109297019A (en) * | 2018-09-13 | 2019-02-01 | 西安交通大学 | A kind of air suspended type fire row combustor with cylindrical fire face |
| CN110720015A (en) * | 2017-10-16 | 2020-01-21 | 株式会社菜花商事 | Tube member and burner with tube member |
| CN112189113A (en) * | 2018-05-25 | 2021-01-05 | 库珀斯解决方案有限公司 | Fuel nozzle system |
| TWI784025B (en) * | 2017-07-10 | 2022-11-21 | 日商大陽日酸股份有限公司 | Oxygen-enriched burner and method for heating using oxygen-enriched burner |
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| JPH02293510A (en) * | 1989-04-20 | 1990-12-04 | Asea Brown Boveri Ag | Burner device |
| CN201281340Y (en) * | 2008-07-21 | 2009-07-29 | 上海凌云瑞升燃烧设备有限公司 | Low NOx subsection combustion apparatus |
| CN102003710A (en) * | 2010-12-10 | 2011-04-06 | 上海诺特飞博燃烧设备有限公司 | Low emission high-power staged-combustion gas burner and gas collocation method thereof |
| CN102032571A (en) * | 2011-01-18 | 2011-04-27 | 鞍山普贝达科技有限公司 | Oxygen-enriched and combustion-supporting device suitable for low calorific value fuel gas |
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| CN103727536A (en) * | 2013-12-05 | 2014-04-16 | 西安西热锅炉环保工程有限公司 | Multistage adjustable ultralow-nitrogen strong and weak rotational flow opposed-impact gas burner |
| CN205155958U (en) * | 2015-12-08 | 2016-04-13 | 上海华之邦科技股份有限公司 | Be suitable for low NOx combustor of various low heat values / low pressure gas |
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2015
- 2015-12-08 CN CN201510893153.8A patent/CN105465786A/en active Pending
Patent Citations (7)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI784025B (en) * | 2017-07-10 | 2022-11-21 | 日商大陽日酸股份有限公司 | Oxygen-enriched burner and method for heating using oxygen-enriched burner |
| CN107218602A (en) * | 2017-07-19 | 2017-09-29 | 上海华之邦科技股份有限公司 | A kind of low heat value/low-pressure gas burner |
| CN110720015A (en) * | 2017-10-16 | 2020-01-21 | 株式会社菜花商事 | Tube member and burner with tube member |
| CN110720015B (en) * | 2017-10-16 | 2021-05-25 | 株式会社菜花商事 | Burner for cooking and grilling method |
| CN108895447A (en) * | 2018-04-17 | 2018-11-27 | 广东技术师范学院天河学院 | Gas gun |
| CN112189113A (en) * | 2018-05-25 | 2021-01-05 | 库珀斯解决方案有限公司 | Fuel nozzle system |
| CN109297019A (en) * | 2018-09-13 | 2019-02-01 | 西安交通大学 | A kind of air suspended type fire row combustor with cylindrical fire face |
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Application publication date: 20160406 |
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