WO2023035050A1 - QUEIMADOR DE BAIXA EMISSÃO DE NOx E MÉTODO OPERACIONAL PARA REDUÇÃO DE FORMAÇÃO DE NOx APLICADO EM PROCESSO DE SINTERIZAÇÃO E/OU ENDURECIMENTO DE PELOTAS DE MINÉRIO DE FERRO - Google Patents
QUEIMADOR DE BAIXA EMISSÃO DE NOx E MÉTODO OPERACIONAL PARA REDUÇÃO DE FORMAÇÃO DE NOx APLICADO EM PROCESSO DE SINTERIZAÇÃO E/OU ENDURECIMENTO DE PELOTAS DE MINÉRIO DE FERRO Download PDFInfo
- Publication number
- WO2023035050A1 WO2023035050A1 PCT/BR2021/050386 BR2021050386W WO2023035050A1 WO 2023035050 A1 WO2023035050 A1 WO 2023035050A1 BR 2021050386 W BR2021050386 W BR 2021050386W WO 2023035050 A1 WO2023035050 A1 WO 2023035050A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- burner
- fuel gas
- descending
- flow
- fin
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 28
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 46
- 239000008188 pellet Substances 0.000 title claims description 22
- 238000005245 sintering Methods 0.000 title claims description 16
- 238000011017 operating method Methods 0.000 title 1
- 239000002737 fuel gas Substances 0.000 claims abstract description 44
- 239000007789 gas Substances 0.000 claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 9
- 239000000446 fuel Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000007800 oxidant agent Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 14
- 230000001590 oxidative effect Effects 0.000 claims description 14
- 238000005453 pelletization Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 5
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 claims 1
- 239000003546 flue gas Substances 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 238000000844 transformation Methods 0.000 claims 1
- 238000009827 uniform distribution Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000003570 air Substances 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- JMBQKKAJIKAWKF-UHFFFAOYSA-N Glutethimide Chemical compound C=1C=CC=CC=1C1(CC)CCC(=O)NC1=O JMBQKKAJIKAWKF-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003897 fog Substances 0.000 description 1
- 229960002972 glutethimide Drugs 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
-
- 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
-
- 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
-
- 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
-
- 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
- F23D14/70—Baffles or like flow-disturbing devices
Definitions
- the present patent deals with a low NOx emission burner and operational method for reducing the formation of Nox applied in the process of sintering and/or hardening of iron ore pellets, more specifically, a burner of the type used in combustion industrial for the reduction of NOx emission by rapid mixing of the fuel gas with the downward flow of the oxidant before autoignition and flame stabilization.
- Said innovative burner integrates an operational method in which the jets of fuel gas discharged from the collector ring are first mixed with the oxidant and follow, in combustion, in rotational movement, through the flow of the descending duct, also known as " downcomer" from the oven.
- Nitrogen oxide gases NO and NO2 are typically formed during the combustion process, especially industrial. The highest temperatures are observed around the stoichiometric zones of the flames and can reach 1925°C/3500F for the combustion of natural gas mixed with ambient air. The maximum of thermal NOx is formed in these zones.
- NOx in burning processes depends on several factors, such as: fuel composition, system operation mode, burner and combustion chamber design.
- One of the determining parameters for the generation of this pollutant is the presence of temperature peaks that occur in certain regions of the flame, which is why the goal of many burner manufacturers and designers of combustion systems with low NOx emission is to reduce or eliminate the occurrence of so-called spikes.
- the burners used in the process of sintering or hardening iron ore pellets use a small amount of primary air, supplied by a blower or fan, and the rest of the oxidant necessary for the combustion reaction is obtained from the Circulating hot flow, which is normally a mixture of hot air and combustion products.
- the oxygen content in this hot circulating stream is typically greater than 10% (volumetric basis).
- the staging of the fuel gas injection is a technique commonly used to control NOx emissions, as it allows the dispersion of the fuel gas within the envelope of the flame, and thus reduces temperature peaks in the flame and the respective formation of NOx. This technique, however, does not allow a significant reduction of NOx emissions in sintering furnaces or hardening of NOx iron ore pellets.
- the flame of the burner used in the process is formed by consuming oxidant at very high temperatures, around 850 to 1050 °C.
- the flame from the burner has a large envelope format being relatively wide and more or less long.
- the volume-envelope-restricted combustion reaction such as, in this case, flame envelope or jet-type flame, always tends to have a higher average temperature, and thus higher NOx, compared to the reaction that is "spread out" in the entire volume of the furnace or furnace.
- the 'l-Jet' burner supplied by FCT Combustion - is an example of burners used in iron ore pelletizing industries.
- This forms a jet-type flame, with the chemical reaction of combustion completed in the flame envelope formed in front of the burner.
- the primary air and fuel gas injection staging in contact and mixing with the kiln ambient gases, form the flame, which can be longer or shorter, wider or narrower.
- it is still a high-temperature, jet-type flame. Due to the staging of fuel gas injection, the average flame temperature can be reduced which can help with NOx reduction. But the reduction is not significant, especially in the process of sintering or high temperature hardening of iron ore. This is largely due to the significant contribution of the high temperature oxidant used in combustion.
- It is another object of the invention to present a low NOx emission burner comprising a fuel gas distribution and injection manifold, which is inserted into the descending channel of the sintering furnace or hardening of iron ore pellets.
- This combination of the combustible gas collector together with the descending passage of the furnace configures the burner of this invention.
- Another objective of this invention is to present a low NOx emission burner whose set includes the gas collector of fuel gas manufactured in the form of a circular ring and made, for example, of stainless steel or silicon carbide.
- the combustible gas collector is equipped with a set of fins mounted on the inside of the collector ring.
- the fins have a special innovative profile and are fixed to the manifold in order to deflect the downward flow of gases from the vertical motion with addition of horizontal motion vector. This vector, together with the cylindrical shape of the d channel downstream, creates rotational movement of the gases downstream of the slip ring/fin assembly.
- the manifold also has a plurality of openings for discharging fuel gas. These vents are arranged in groups, with each group positioned against a single fin. Each group can have, for example, from four to six openings that discharge fuel gas against the wall of each fin.
- the gas collector ring has at least one inlet, which can be connected to the fuel gas supply system.
- the burner assembly is inserted into the vertical passage of the furnace where the downward flow needs to be heated, for example, from 900 to 1300 °C, before entering the mobile iron ore pellet grate.
- the fins deflect part of the downward flow and create the effect of rotational flow in the vertical passage of the furnace.
- the vertical section of the descending passageway is necessary to create this swirling effect and thus allow rapid mixing of the fuel gas with oxidant before the combustion reaction takes place. Therefore, defining the location of the burner insertion in the vertical passage is essential to achieve the best result.
- the new method proposes that the jets of fuel gas discharged from the collector ring predominantly mix first with the oxidant and then burn in the downstream stream rotational.
- the even distribution of the fuel gas around the perimeter of the downcomer passage along with the swirling effect of the downstream flow allows for rapid mixing of the fuel gas with the dilute oxygen downstream.
- temperature peaks are reduced.
- Downstream gases are composed primarily of oxygen (O2), nitrogen (N2), carbon dioxide (CO2) and water vapor (H2O).
- the presence of these inert gases (CO2, N2 and H2O) significantly reduce the adiabatic temperature of the combustion reaction. All of these factors together can lead to a significant reduction in NOx formation in the combustion zone.
- Figure 1 shows a schematic elevation side view of the furnace for sintering or hardening iron ore pellets with an innovative window for inserting the burner into a vertical passage;
- Figure 2 represents a burner assembly in top view, represented inside the cylindrical descending channel of the furnace;
- Figure 3 illustrates a perspective view of the burner collector ring with the fins installed on the inner circumference of the collector
- Figure 4 shows a horizontal view 'A' indicated in Figure 2 of the inner part of the burner gas collector ring and demonstrating the positioning of the fins;
- Figure 5 shows a longitudinal sectional view in a plane through the middle of the vanes to illustrate the positioning of the gas injectors with respect to each vane;
- Figure 6 illustrates a 'B' profile view of the fin shown in Figure 4.
- Figure 7 shows the fins in perspective illustrating their more intense deflection effect of the downward flow; It is [026]
- Figure 8 shows a portion of the downstream channel of the kiln, where the burner is installed, to illustrate the swirl pattern of the burn stream in the channel.
- This patent refers to the "LOW NOx EMISSION BURNER AND OPERATIONAL METHOD FOR REDUCING NOx FORMATION APPLIED IN THE PROCESS OF SINTERIZING OR HARDENING IRON ORE PELLETS", more precisely it is a burner ( 12) of the type for industrial combustion and iron ore pelletizing process, and more exactly, to sintering furnaces or hardening of iron ore pellets.
- said burner (12) is installed in the descending passage (14) of the oven (FO) through the window (16), located in the upper portion of the descending passage (14). Said burner (12) raises the temperature of the descending circulating flow (18) from the gas collector (20) to the required level before entering the mobile grids (22) provided with iron ore pellets (22a).
- the burner (12) comprises a collector ring (24) with a circular or rectangular section. The external diameter (D) of the ring (24) is smaller than the internal diameter (D') of the downward passage (14).
- the collector ring (24) is equipped on its inner circumference with fins (26) (see figures 2, 3 and 4), oblique in angle (a) with respect to the horizontal transverse plane of the collector, which allow to deflect the flow down and input horizontal velocity components to it.
- Said angulation (a) causes the velocity vector to obtain a tangential component and so that, in the cylindrical profile of the descending channel, it generates a swirling or rotational effect.
- the deflection angle (a) of the vane (26) can be from 30° to 60° with respect to the horizontal transverse plane of the collector ring (24) of fuel gas. If angle (a) is greater than 60°, the deflection, and thus the rotational effect, will not be strong enough to achieve the desired rapid gas/oxidizer mixing. On the other hand, if the angle (a) is less than 30°, the resistance to the downward flow (18) increases significantly resulting in less flow traveling along the fins (26) and more flow in the center of the downward channel (14). .
- the distance (K) between the fins (26), the length (L) of each fin (26) and the number of fins (26) are determined to create the necessary intensity of rotation of the downward flow (18) without increasing significantly the head loss through the burner (12) installed in the descending channel.
- the collector ring (24) of the burner (12) is equipped with at least one inlet pipe (28) arranged orthogonally to the collector ring (24), which can be connected to the fuel gas supply line.
- Fuel gas is injected into the hot gas stream (18) through a plurality of openings (30) (see Figure 5).
- Said openings are organized in groups (32), aligned, and have their discharges pointed towards the wall of each fin (26) aligned.
- Each group (32) can be formed by two to eight openings (30), in this case we present a model with five openings for the discharge of the fuel jets (34) in each passage of the fin (26).
- Part of the total downward flow (18) travels along the vane passage (26) mixes with the five fuel jets (34) and all together are deflected to create a rotational flow downstream of the burner (12).
- Each fin (26) (see figures 4 and 6) is built in the shape of an 'L' profile, with the flap (26a) forming an angle (P) of 90° (see figure 6). This preferably varies between 45° and 90°. If the angle (P) exceeds 90°, the jets of fuel gas (34) can partially escape the passage of the vane (26) and reduce the mixing efficiency. On the other hand, if this angle (P) is less than 45°, the jets of fuel gas (34) can create unnecessary pressure fluctuations and possibly vibration of the burner (12).
- the choice of dimension (N) of the fin (26) depends on the diameter (D') and area of the descending channel (14), where the burner (12) is installed.
- the ratio of the dimensions (M)/(N) of each fin (26) is preferably between 0.25 and 0.5, if less than 0.25, jets of fuel gas (34) can escape the passage of the fin (26), if greater than 0.5, the fin (26) will be heavier without any additional benefit to the burner.
- each fin (26) can be shaped in a way (see figure 7) to deflect the downward flow (18) more horizontally, and, at the to do so, promote a greater degree of rotation within the descending cylindrical channel downstream of the burner (12).
- the cylindrical descending channel (14) should be considered as a part of the burner (12).
- Part of the downward flow (18) deflected by the fins (26) is pre-mixed with the fuel gas and acquires rotational motion (42) along the cylindrical surface of the downward channel (14).
- the current is burnt.
- the fuel gas is uniformly distributed around the circumference (46) of this channel, mixing occurs rapidly with diluted oxygen in the inert gases, and as a result, the temperature peaks are significantly reduced and the combustion reaction produces very low NOx emission in compared to the previous technique.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21956274.1A EP4400766A1 (en) | 2021-09-09 | 2021-09-09 | Low nox emission burner and operating method for reducing nox formation applied to an iron ore pellet sintering and/or hardening method |
AU2021463384A AU2021463384A1 (en) | 2021-09-09 | 2021-09-09 | Low nox emission burner and operating method for reducing nox formation applied to an iron ore pellet sintering and/or hardening method |
US18/283,959 US20240159393A1 (en) | 2021-09-09 | 2021-09-09 | Low nox emission burner and operating method for reducing nox formation applied to iron ore pellet sintering and/or enduring method |
PCT/BR2021/050386 WO2023035050A1 (pt) | 2021-09-09 | 2021-09-09 | QUEIMADOR DE BAIXA EMISSÃO DE NOx E MÉTODO OPERACIONAL PARA REDUÇÃO DE FORMAÇÃO DE NOx APLICADO EM PROCESSO DE SINTERIZAÇÃO E/OU ENDURECIMENTO DE PELOTAS DE MINÉRIO DE FERRO |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/BR2021/050386 WO2023035050A1 (pt) | 2021-09-09 | 2021-09-09 | QUEIMADOR DE BAIXA EMISSÃO DE NOx E MÉTODO OPERACIONAL PARA REDUÇÃO DE FORMAÇÃO DE NOx APLICADO EM PROCESSO DE SINTERIZAÇÃO E/OU ENDURECIMENTO DE PELOTAS DE MINÉRIO DE FERRO |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023035050A1 true WO2023035050A1 (pt) | 2023-03-16 |
Family
ID=85506019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2021/050386 WO2023035050A1 (pt) | 2021-09-09 | 2021-09-09 | QUEIMADOR DE BAIXA EMISSÃO DE NOx E MÉTODO OPERACIONAL PARA REDUÇÃO DE FORMAÇÃO DE NOx APLICADO EM PROCESSO DE SINTERIZAÇÃO E/OU ENDURECIMENTO DE PELOTAS DE MINÉRIO DE FERRO |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240159393A1 (pt) |
EP (1) | EP4400766A1 (pt) |
AU (1) | AU2021463384A1 (pt) |
WO (1) | WO2023035050A1 (pt) |
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US2676095A (en) | 1948-01-14 | 1954-04-20 | Erie Mining Co | Indurating furnace and process |
US3568934A (en) * | 1969-02-10 | 1971-03-09 | Peabody Engineering Corp | Gas ring for fuel burner |
WO2003081133A1 (fr) * | 2002-03-22 | 2003-10-02 | Rinnai Kabushiki Kaisha | Bruleur |
JP2005060762A (ja) | 2003-08-11 | 2005-03-10 | Kobe Steel Ltd | 鉄鉱石ペレットの製造方法および製造装置 |
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2021
- 2021-09-09 EP EP21956274.1A patent/EP4400766A1/en active Pending
- 2021-09-09 WO PCT/BR2021/050386 patent/WO2023035050A1/pt active Application Filing
- 2021-09-09 US US18/283,959 patent/US20240159393A1/en active Pending
- 2021-09-09 AU AU2021463384A patent/AU2021463384A1/en active Pending
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US2676095A (en) | 1948-01-14 | 1954-04-20 | Erie Mining Co | Indurating furnace and process |
US3568934A (en) * | 1969-02-10 | 1971-03-09 | Peabody Engineering Corp | Gas ring for fuel burner |
WO2003081133A1 (fr) * | 2002-03-22 | 2003-10-02 | Rinnai Kabushiki Kaisha | Bruleur |
US7083123B2 (en) * | 2002-12-17 | 2006-08-01 | Gaz De France | Internal flame gas burner with high compactness |
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JP2008185054A (ja) | 2007-01-26 | 2008-08-14 | Yamaha Motor Co Ltd | 樹脂ブロックベルトを有するベルト式無段変速機およびそれを備えた自動二輪車 |
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US8961650B2 (en) | 2011-12-05 | 2015-02-24 | Mitsubishi-Hitachi Metals Machinery, Inc. | Partially-reduced iron producing method and partially-reduced iron producing apparatus |
CN104114681B (zh) | 2011-12-21 | 2017-05-31 | 肯塔基州-田纳西州粘土公司 | 用于避免如集聚、沉积、腐蚀等问题并减少排放物的矿物添加剂掺合组合物和燃烧器的运行方法 |
KR101665066B1 (ko) | 2014-11-24 | 2016-10-25 | 주식회사 포스코 | 소결장치 및 소결방법 |
CN208139271U (zh) * | 2017-12-30 | 2018-11-23 | 福建华夏蓝天科技有限公司 | 一种低氮气体燃烧器 |
CN109323253A (zh) * | 2018-09-07 | 2019-02-12 | 西安交通大学 | 一种均匀预混低NOx气体燃烧器 |
CN110748880A (zh) * | 2019-09-19 | 2020-02-04 | 上海诺特飞博燃烧设备有限公司 | 双气环喷射枪燃烧装置 |
CN211399786U (zh) * | 2019-12-23 | 2020-09-01 | 上海迎韦热能设备有限公司 | 一种用于低氮燃烧器的全预混装置 |
CN111397357A (zh) * | 2020-03-20 | 2020-07-10 | 奉先华 | 一种立式环形竖窑 |
CN213237516U (zh) * | 2020-09-24 | 2021-05-18 | 徐州亚华同创节能环保科技有限公司 | 一种耐高温放散燃烧器 |
CN112361335A (zh) * | 2020-11-27 | 2021-02-12 | 华侨大学 | 一种基于多区域燃烧的燃烧器 |
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