CN105805741A - Gas burner and burning method achieving ultra-low nitrogen oxide emission - Google Patents
Gas burner and burning method achieving ultra-low nitrogen oxide emission Download PDFInfo
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- CN105805741A CN105805741A CN201610258326.3A CN201610258326A CN105805741A CN 105805741 A CN105805741 A CN 105805741A CN 201610258326 A CN201610258326 A CN 201610258326A CN 105805741 A CN105805741 A CN 105805741A
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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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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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
- F23D14/12—Radiant burners
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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
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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
- F23D14/62—Mixing devices; Mixing tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to the technical field of energy conservation, emission reduction and low-pollution burning, in particular to a gas burner and burning method achieving ultra-low nitrogen oxide emission. The gas burner achieving ultra-low nitrogen oxide emission comprises a mixer, a pre-mixing burning section and an after-burning section. Total gas is divided into primary fuel and secondary fuel; the primary fuel accounts for 25%-55% of the total gas and is evenly mixed with total combustion-supporting air, and emission of nitric oxide is restrained through the low-fuel-concentration pre-mixing burning principle; the secondary fuel accounts for 45%-75% of the total gas, and emission of the nitric oxide is restrained through the low-oxygen-concentration diffusive burning principle; and meanwhile the low content of residual oxygen in a burnt product is ensured, and the temperature of exhaust gas is high. In the pre-mixing burning section, ceramic porous filler is used as a medium for stable flames, and the stability of low-fuel-concentration pre-mixing burning is achieved; and the ceramic porous filler is of a divergent structure, so that tempering is effectively avoided, and safety is improved. Compared with a conventional burning mode, the nitrogen oxide emission can be reduced by 50%-90%, and the nitrogen oxide emission concentration under rated loads is lower than 30 mg/m<3>.
Description
Technical field
The present invention relates to energy-saving and emission-reduction and combustion with reduced pollutants technical field, particularly relate to a kind of gas burner reducing discharged nitrous oxides and combustion method, under not affecting the premise of burner combustion efficiency and operating cost, compare with conventional combustion manner and can reduce discharged nitrous oxides 50%～90% in combustion product gases, burner when rated load discharged nitrous oxides concentration lower than 30mg/m3。
Background technology
Current low-nitrogen oxide discharging combustion technology research is divided into three directions: the pretreatment to fuel and air；Distributing rationally and burner structure design of air and fuel；Post processing to flue gas.For preprocess method and the flue gas processing method of fuel and air, due to system complex, investment is big, take up an area the reasons such as big, operating cost is high, for relatively decentralized user, lower-powered burner inapplicable.Low NO, while suppressing NO_x formation, often reduces with efficiency of combustion reduction, ignition temperature or excess air coefficient improves, bring the problems such as efficiency of combustion reduction and operating cost raising.Most popular flue gas recirculation method in current low-nitrogen oxide discharging combustion technology, however it remains problems with: one, obtaining flue gas recirculation with high velocity air injection method, amount of circulating gas is difficult to control；Two, produce a large amount of condensed water after circulating flue gas cooling, reduce blower fan, burner service life；Three, circulating flue gas ratio reduces discharging limited use, combustion instability during circulating flue gas large percentage time less.For these reasons, current low-nitrogen oxide discharging burner urgently improves.
Summary of the invention
It is an object of the invention to: a kind of gas burner that can reduce discharged nitrous oxides and combustion method are provided, do not reduce under the premise not increased with operating cost in efficiency of combustion, comparing with conventional combustion manner and can reduce discharged nitrous oxides 50%～90% in combustion product gases, under design conditions, discharged nitrous oxides concentration is lower than 30mg/m3。
For achieving the above object, the invention provides a kind of ultralow discharged nitrous oxides gas burner, specifically adopt the technical scheme that: include being sequentially connected with the blender of setting, premixed combustion section and aftercombustion section, described blender front end is provided with combustion air interface, described blender top arranges primary fuel interface, described premixed combustion intrasegmental part sets gradually metal grid and fills ceramic porous filler, described ceramic porous filler is flared, described aftercombustion section top arranges secondary fuel interface, described aftercombustion intrasegmental part front end arranges baffle brick, in described aftercombustion section postmedian cavity, secondary fuel spout is set, described secondary fuel spout is connected by pipeline with described secondary fuel interface, the external heater in described aftercombustion section rear end, boiler or industrial furnace body.
Preferably, described metal grid material is heat resisting steel, and described ceramic porous filler material is foamed ceramics, ceramic honey comb or piles up ceramic bead.
Preferably, described internal mixer arranges porous plate.
Preferably, described premixed combustion section and described aftercombustion piece housing are lined with thermal insulating warm-keeping layer, it is to avoid scattering and disappearing of calory burning, the material of described thermal insulating warm-keeping layer is Low Cement Castable or alumina silicate fibre.
Preferably, arranging 1～8 secondary fuel spout in described aftercombustion section cavity, described secondary fuel spout is connected with described secondary fuel interface by running through the pipeline of thermal insulating warm-keeping layer, and the material of described secondary fuel spout is heat resisting steel, pottery or carborundum.
Preferably, described ceramic porous filler inlet area A1, discharge area A, the determination of described ceramic porous filler discharge area A is according to formula: A=CQ；Wherein, C is constant, and unit is h/m, and its span is 1.96 × 10-4～4.48 × 10-4；Q is the volume flow of whole combustion air, and unit is m3/h；Described ceramic porous filler inlet area A1For discharge area A 0.06～0.12 times；The length of described ceramic porous filler is L1, L1Span be 0.4～0.8m.
Preferably, the length of described aftercombustion section postmedian cavity is L2, L2Span be 0.6～1.2m.
Preferably, described aftercombustion section cross section is square, and described secondary fuel spout central line intersects with described aftercombustion section centrage, and secondary fuel is to described aftercombustion section central-injection.
Preferably, described aftercombustion section cross section is circular, and described secondary fuel spout central line keeps certain distance with aftercombustion section centrage, and secondary fuel is along described aftercombustion section peripheral jet.
According to a further aspect in the invention, a kind of ultralow discharged nitrous oxides combustion method is additionally provided, it is characterised in that described method includes,
--blender front end, top are respectively provided with combustion air interface and primary fuel interface, and described blender rear end connects premixed combustion section；
--described premixed combustion intrasegmental part sets gradually metal grid and fills ceramic porous filler, and described ceramic porous filler is flared, and described premixed combustion section rear end connects aftercombustion section；
--described aftercombustion section top arranges secondary fuel interface, described aftercombustion intrasegmental part front end arranges baffle brick, in described aftercombustion section postmedian cavity, secondary fuel spout is set, described secondary fuel spout is connected by pipeline with described secondary fuel interface, the external heater in described aftercombustion section rear end, boiler or industrial furnace body；
Whole combustion airs enter blender by combustion air interface, and the primary fuel accounting for combustion gas total amount 25%～55% enters blender by primary fuel interface, with whole combustion air Homogeneous phase mixing；Premixed gas enters scorching hot ceramic porous filler in premixed combustion section and starts burning；Because fuel concentration is relatively low, ignition temperature reduces, it is to avoid the generation of heating power nitrogen oxides；Ceramic porous filler profile is divergent contour structure, and premixed gas slows down gradually and starts burning at suitable sectional area and flow velocity place, can be prevented effectively from tempering, and safety is improved；The secondary fuel accounting for combustion gas total amount 45%～75% enters aftercombustion section by secondary fuel interface, secondary fuel spout, high-temperature flue gas mixed combustion with oxygen concentration 10%～15%, owing in high-temperature flue gas, oxygen concentration is relatively low, can effectively suppress the generation of nitrogen oxides.
Preferably, described internal mixer arranges porous plate, whole combustion airs and primary fuel premixed gas through described porous plate, promotes mixed effect further, shortens mixing distance.
Preferably, described premixed combustion section and described aftercombustion piece housing are lined with thermal insulating warm-keeping layer, it is to avoid scattering and disappearing of calory burning, the material of described thermal insulating warm-keeping layer is Low Cement Castable or alumina silicate fibre.
Preferably, described aftercombustion section cross section is square, described secondary fuel spout central line intersects with described aftercombustion section centrage, secondary fuel to described aftercombustion section central-injection, realizes being sufficiently mixed of secondary fuel and oxygen-containing high-temperature flue gas by secondary fuel in the effect of impact of described aftercombustion section approximate centerline.
Preferably, described aftercombustion section cross section is circular, described secondary fuel spout central line keeps certain distance with aftercombustion section centrage, secondary fuel is along described aftercombustion section peripheral jet, swirl flame, the immixture of strengthening secondary fuel and oxygen-containing high-temperature flue gas is formed in described aftercombustion section.
The innovative point of the present invention is in that: one, whole combustion gas are divided into primary fuel and secondary fuel, enters burner from different passages, completes combustion process by different way；Primary fuel accounts for the 25%～55% of combustion gas total amount, and with whole combustion air Homogeneous phase mixing, employing low fuel concentration premixed combustion principle suppresses discharged nitrous oxides；Secondary fuel accounts for the 45%～75% of combustion gas total amount, adopts low oxygen concentration diffusion combustion principle to suppress discharged nitrous oxides, ensures that in combustion product, residual oxygen content is low simultaneously, and flue-gas temperature is high.Two, use ceramic porous filler as the medium of stable flame, solve the flame stability problems of low fuel concentration premixed combustion；Ceramic porous filler is divergent contour structure, and premixed gas slows down gradually and starts burning, can be prevented effectively from tempering, and safety is improved.
It is an advantage of the current invention that: one, environmental benefit is notable, can reduce discharged nitrous oxides 50%～90% compared with conventional gas burners；Two, the high-temperature flue-gas that while reducing discharged nitrous oxides, burning produces does not reduce, efficiency of combustion does not reduce, operating cost does not increase；Three, simple in construction, easy to operate, can directly replace the ordinary burner of Same Efficieney.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the structural representation of one embodiment of aftercombustion section Section A-A in the present invention.
Fig. 3 is the structural representation of aftercombustion section another embodiment of Section A-A in the present invention.
Wherein, blender 1, combustion air interface 11, primary fuel interface 12, porous plate 13, premixed combustion section 2, metal grid 21, ceramic porous filler 22, aftercombustion section 3, secondary fuel interface 31, secondary fuel spout 32, baffle brick 33, thermal insulating warm-keeping layer 4.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, it is further elucidated with the present invention, it should be understood that these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention, after having read the present invention, the amendment of the various equivalent form of values of the present invention is all fallen within the application claims limited range by those skilled in the art.
As it is shown in figure 1, the present invention includes blender 1, premixed combustion section 2 and aftercombustion section 3 three parts.
Blender 1 front end arranges combustion air interface 11, and its top offers primary fuel interface 12, and rear end is connected with premixed combustion section 2.Blender 1 is internal arranges porous plate 13, contributes to air and primary fuel mix homogeneously.
Premixed combustion section 2 front end is connected with blender 1, rear end is connected with aftercombustion section 3, premixed combustion section 2 and aftercombustion section 3 casing lining have thermal insulating warm-keeping layer 4 to avoid scattering and disappearing of calory burning, and the material of thermal insulating warm-keeping layer 4 is Low Cement Castable or alumina silicate fibre.
Premixed combustion section 2 is internal to be set gradually metal grid 21 from front to back and fills ceramic porous filler 22；Metal grid 21 material is heat resisting steel；Ceramic porous filler 22 material is foamed ceramics, ceramic honey comb or piles up ceramic bead.The profile of ceramic porous filler 22 is expansion shape, inlet area A1, discharge area A.Can being determined open area A by formula A=CQ, wherein C is 1.96 × 10-4～4.48 × 10-4(unit h/m)；Q is volume flow (the unit m of whole combustion air3/h)。A1The span of/A is 0.06～0.12.The length of ceramic porous filler 22 is L1, L1Span be 0.4～0.8m.
Aftercombustion section 3 top arranges secondary fuel interface 31, and rear end is connected with heater, boiler or industrial furnace body.Aftercombustion section 3 interior forward end arranges baffle brick 33, and postmedian is cavity, and the length of aftercombustion section 3 internal cavity is L2, L2Span be 0.6～1.2m.1～8 secondary fuel spout 32 is set in aftercombustion section 3 cavity；Secondary fuel spout 32 is connected with secondary fuel interface 31 by running through the pipeline of thermal insulating warm-keeping layer 4；The material of secondary fuel spout 32 is heat resisting steel, pottery or carborundum.
Whole combustion airs enter blender 1 by combustion air interface 11, and the primary fuel accounting for combustion gas total amount 25%～55% enters blender 1 by primary fuel interface 12, with whole combustion air Homogeneous phase mixing.Premixed gas, through porous plate 13, promotes mixed effect further, shortens mixing distance.
Premixed gas enters scorching hot ceramic porous filler 22 in premixed combustion section 2 and starts burning；Because fuel concentration is relatively low, ignition temperature reduces, it is to avoid the generation of heating power nitrogen oxides.Ceramic porous filler 22 is divergent contour structure, and premixed gas slows down gradually and starts burning at suitable sectional area and flow velocity place, can be prevented effectively from tempering, and safety is improved.Ceramic porous filler 22 is fixed by metal grid 21 and baffle brick 33.
The secondary fuel accounting for combustion gas total amount 45%～75% enters aftercombustion section 3 by secondary fuel interface 31, secondary fuel spout 32, with the high-temperature flue gas mixed combustion of oxygen concentration 10%～15%；Owing in high-temperature flue gas, oxygen concentration is relatively low, can effectively suppress the generation of nitrogen oxides.
Fig. 2 is the structural representation of the first embodiment Section A-A of the present invention, and aftercombustion section 3 is square, and secondary fuel spout 32 centrage intersects with aftercombustion section 3 centrage, and namely secondary fuel is to aftercombustion section 3 central-injection.This structure realizes being sufficiently mixed of secondary fuel and oxygen-containing high-temperature flue gas by secondary fuel in the effect of impact of aftercombustion section 3 approximate centerline, it is ensured that second-time burning stability and efficiency of combustion, the advantage with simple in construction.
Fig. 3 is the structural representation of the second embodiment Section A-A of the present invention, compare with the first embodiment, aftercombustion section 3 in the present embodiment is circular, and secondary fuel spout 32 centrage and aftercombustion section 3 centrage have certain distance, and namely secondary fuel is along aftercombustion section 3 peripheral jet.This structure can form swirl flame, the immixture of strengthening secondary fuel and oxygen-containing high-temperature flue gas, it is ensured that second-time burning stability and efficiency of combustion in aftercombustion section 3.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a ultralow discharged nitrous oxides gas burner, including the blender being sequentially connected with setting, premixed combustion section and aftercombustion section, it is characterized in that, described blender front end is provided with combustion air interface, described blender top arranges primary fuel interface, described premixed combustion intrasegmental part sets gradually metal grid and fills ceramic porous filler, described ceramic porous filler is flared, described aftercombustion section top arranges secondary fuel interface, described aftercombustion intrasegmental part front end arranges baffle brick, in described aftercombustion section postmedian cavity, secondary fuel spout is set, described secondary fuel spout is connected by pipeline with described secondary fuel interface, the external heater in described aftercombustion section rear end, boiler or industrial furnace body.
2. a kind of ultralow discharged nitrous oxides gas burner as claimed in claim 1, it is characterised in that described metal grid material is heat resisting steel, described ceramic porous filler material is foamed ceramics, ceramic honey comb or piles up ceramic bead.
3. a kind of ultralow discharged nitrous oxides gas burner as claimed in claim 2, it is characterised in that described internal mixer arranges porous plate.
4. a kind of ultralow discharged nitrous oxides gas burner as claimed in claim 3, it is characterised in that described premixed combustion section and described aftercombustion piece housing are lined with thermal insulating warm-keeping layer, and the material of described thermal insulating warm-keeping layer is Low Cement Castable or alumina silicate fibre.
5. a kind of ultralow discharged nitrous oxides gas burner as claimed in claim 4, it is characterized in that, in described aftercombustion section cavity, 1～8 secondary fuel spout is set, described secondary fuel spout is connected with described secondary fuel interface by running through the pipeline of described thermal insulating warm-keeping layer, and the material of described secondary fuel spout is heat resisting steel, pottery or carborundum.
6. a kind of ultralow discharged nitrous oxides gas burner as claimed in claim 5, it is characterised in that described ceramic porous filler inlet area A1, discharge area A, the determination of described ceramic porous filler discharge area A is according to formula: A=CQ；Wherein, C is constant, and unit is h/m, and its span is 1.96 × 10-4～4.48 × 10-4；Q is the volume flow of whole combustion air, and unit is m3/h；Described ceramic porous filler inlet area A1For discharge area A 0.06～0.12 times；The length of described ceramic porous filler is L1, L1Span be 0.4～0.8m.
7. a kind of ultralow discharged nitrous oxides gas burner as claimed in claim 6, it is characterised in that the length of described aftercombustion section postmedian cavity is L2, L2Span be 0.6～1.2m.
8. a kind of ultralow discharged nitrous oxides gas burner as claimed in claim 7, it is characterized in that, described aftercombustion section cross section is square, and described secondary fuel spout central line intersects with described aftercombustion section centrage, and secondary fuel is to described aftercombustion section central-injection.
9. a kind of ultralow discharged nitrous oxides gas burner as claimed in claim 7, it is characterized in that, described aftercombustion section cross section is circular, and described secondary fuel spout central line keeps certain distance with aftercombustion section centrage, and secondary fuel is along described aftercombustion section peripheral jet.
10. a ultralow discharged nitrous oxides combustion method, it is characterised in that described method includes,
--blender front end, top are respectively provided with combustion air interface and primary fuel interface, and described blender rear end connects premixed combustion section；
--described premixed combustion intrasegmental part sets gradually metal grid and fills ceramic porous filler, and described ceramic porous filler is flared, and described premixed combustion section rear end connects aftercombustion section；
--described aftercombustion section top arranges secondary fuel interface, described aftercombustion intrasegmental part front end arranges baffle brick, in described aftercombustion section postmedian cavity, secondary fuel spout is set, described secondary fuel spout is connected by pipeline with described secondary fuel interface, the external heater in described aftercombustion section rear end, boiler or industrial furnace body；
Whole combustion airs enter blender by combustion air interface, and the primary fuel accounting for combustion gas total amount 25%～55% enters blender by primary fuel interface, with whole combustion air Homogeneous phase mixing；Premixed gas enters scorching hot ceramic porous filler in premixed combustion section and starts burning；Because fuel concentration is relatively low, ignition temperature reduces, it is to avoid the generation of heating power nitrogen oxides；Ceramic porous filler profile is divergent contour structure, and premixed gas slows down gradually and starts burning at suitable sectional area and flow velocity place, can be prevented effectively from tempering, and safety is improved；The secondary fuel accounting for combustion gas total amount 45%～75% enters aftercombustion section by secondary fuel interface, secondary fuel spout, high-temperature flue gas mixed combustion with oxygen concentration 10%～15%, owing in high-temperature flue gas, oxygen concentration is relatively low, can effectively suppress the generation of nitrogen oxides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610258326.3A CN105805741A (en) | 2016-04-22 | 2016-04-22 | Gas burner and burning method achieving ultra-low nitrogen oxide emission |
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| CN201610258326.3A CN105805741A (en) | 2016-04-22 | 2016-04-22 | Gas burner and burning method achieving ultra-low nitrogen oxide emission |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838900A (en) * | 2017-02-20 | 2017-06-13 | 海湾环境科技（北京）股份有限公司 | Burner and fuel gas buring method |
| CN107461740A (en) * | 2017-08-16 | 2017-12-12 | 奥普家居股份有限公司 | Strong drum-type cooker burner |
| CN108003666A (en) * | 2018-01-05 | 2018-05-08 | 江西黑猫炭黑股份有限公司 | A kind of carbon black manufacture method for discharging low nitrogen flue gas |
| CN110566947A (en) * | 2019-09-16 | 2019-12-13 | 浙江力聚热水机有限公司 | Ultra-low nitrogen premixed gas burner and burning method thereof |
| CN111121021A (en) * | 2019-12-18 | 2020-05-08 | 史星宇 | Low-nitrogen combustion device with free diffusion premixed combustion layer and combustion head thereof |
| CN111288448A (en) * | 2020-03-20 | 2020-06-16 | 东营富润智能科技有限公司 | Ultralow nitrogen burner for oil field heating furnace |
| CN111547700A (en) * | 2020-04-29 | 2020-08-18 | 中国铝业股份有限公司 | Plain burning furnace flame path structure of burning of charcoal |
| CN112250325A (en) * | 2020-10-29 | 2021-01-22 | 中南大学 | Method for reducing NOx emission peak value in double-chamber lime kiln switching combustion process |
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- 2016-04-22 CN CN201610258326.3A patent/CN105805741A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106838900A (en) * | 2017-02-20 | 2017-06-13 | 海湾环境科技（北京）股份有限公司 | Burner and fuel gas buring method |
| CN107461740A (en) * | 2017-08-16 | 2017-12-12 | 奥普家居股份有限公司 | Strong drum-type cooker burner |
| CN108003666A (en) * | 2018-01-05 | 2018-05-08 | 江西黑猫炭黑股份有限公司 | A kind of carbon black manufacture method for discharging low nitrogen flue gas |
| CN108003666B (en) * | 2018-01-05 | 2023-03-14 | 江西黑猫炭黑股份有限公司 | Method for manufacturing carbon black capable of discharging low-nitrogen flue gas |
| CN110566947A (en) * | 2019-09-16 | 2019-12-13 | 浙江力聚热水机有限公司 | Ultra-low nitrogen premixed gas burner and burning method thereof |
| CN111121021A (en) * | 2019-12-18 | 2020-05-08 | 史星宇 | Low-nitrogen combustion device with free diffusion premixed combustion layer and combustion head thereof |
| CN111288448A (en) * | 2020-03-20 | 2020-06-16 | 东营富润智能科技有限公司 | Ultralow nitrogen burner for oil field heating furnace |
| CN111288448B (en) * | 2020-03-20 | 2022-03-29 | 东营富润智能科技有限公司 | Ultralow nitrogen burner for oil field heating furnace |
| CN111547700A (en) * | 2020-04-29 | 2020-08-18 | 中国铝业股份有限公司 | Plain burning furnace flame path structure of burning of charcoal |
| CN111547700B (en) * | 2020-04-29 | 2022-03-29 | 中国铝业股份有限公司 | Plain burning furnace flame path structure of burning of charcoal |
| CN112250325A (en) * | 2020-10-29 | 2021-01-22 | 中南大学 | Method for reducing NOx emission peak value in double-chamber lime kiln switching combustion process |
| CN112250325B (en) * | 2020-10-29 | 2021-11-09 | 中南大学 | Method for reducing NOx emission peak value in double-chamber lime kiln switching combustion process |
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Application publication date: 20160727 |