EP1488171B1 - BURNER DESIGN WITH HIGHER RATES OF FLUE GAS RECIRCULATION AND REDUCED NOx EMISSIONS - Google Patents
BURNER DESIGN WITH HIGHER RATES OF FLUE GAS RECIRCULATION AND REDUCED NOx EMISSIONS Download PDFInfo
- Publication number
- EP1488171B1 EP1488171B1 EP03728252A EP03728252A EP1488171B1 EP 1488171 B1 EP1488171 B1 EP 1488171B1 EP 03728252 A EP03728252 A EP 03728252A EP 03728252 A EP03728252 A EP 03728252A EP 1488171 B1 EP1488171 B1 EP 1488171B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- flame
- flue gas
- opening
- furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 56
- 239000003546 flue gas Substances 0.000 title claims description 56
- 238000013461 design Methods 0.000 title description 7
- 239000000446 fuel Substances 0.000 claims description 56
- 238000002485 combustion reaction Methods 0.000 claims description 33
- 238000011144 upstream manufacturing Methods 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 230000001965 increasing effect Effects 0.000 claims description 7
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 5
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical group [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 5
- 238000004230 steam cracking Methods 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 3
- 239000003570 air Substances 0.000 description 89
- 229910002089 NOx Inorganic materials 0.000 description 30
- 239000007789 gas Substances 0.000 description 15
- 239000000203 mixture Substances 0.000 description 13
- 239000012080 ambient air Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 238000006722 reduction reaction Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 230000001105 regulatory effect Effects 0.000 description 1
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Images
Definitions
- This invention relates to improvements in burners such as those employed in high temperature furnaces for use in the steam cracking of hydrocarbons. More particularly, the invention relates to low NO x FGR burners with higher flue gas recirculation rates.
- burner design has undergone substantial change.
- improvements in burner design were aimed primarily at improving heat distribution.
- Increasingly stringent environmental regulations have shifted the focus of burner design to the minimization of regulated pollutants.
- Oxides of nitrogen (NO x ) are formed in air at high temperatures. These compounds include, but are not limited to nitrogen oxide and nitrogen dioxide. Reduction of NO x emissions is a desired goal to decrease air pollution and meet government regulations. In recent years, a wide variety of mobile and stationary sources of NO x emissions have come under increased scrutiny and regulation.
- SCR Selective Catalytic Reduction
- Burners used in large industrial furnaces may use either liquid or gaseous fuel.
- Liquid fuel burners mix the fuel with steam prior to combustion to atomize the fuel to enable more complete combustion, and mix combustion air with the fuel at the zone of combustion.
- Gas fired burners can be classified as either premix or raw gas, depending on the method used to combine the air and fuel. They also differ in configuration and the type of burner tip used.
- Raw gas burners inject fuel directly into the air stream, such that the mixing of fuel and air occurs simultaneously with combustion. Since airflow does not change appreciably with fuel flow, the air register settings of natural draft burners must be changed after firing rate changes. Therefore, frequent adjustment may be necessary.. In addition, many raw gas burners produce luminous flames.
- Premix burners mix some or all of the fuel with some or all of the combustion air prior to combustion. Since premixing is accomplished by using the energy present in the fuel stream, airflow is largely proportional to fuel flow. As a result, therefore, less frequent adjustment is required. Premixing the fuel and air also facilitates the achievement of the desired flame characteristics. Due to these properties, premix burners are often compatible with various steam cracking furnace configurations.
- Premix burners are used in many steam crackers and steam reformers primarily because of their ability to produce a relatively uniform heat distribution profile in the tall radiant sections of these furnaces. Flames are non-luminous, permitting tube metal temperatures to be readily monitored. Therefore, a premix burner is the burner of choice for such furnaces. Premix burners can also be designed for special heat distribution profiles or flame shapes required in other types of furnaces.
- NO x is formed by the oxidation of nitrogen drawn into the burner with the combustion air stream.
- the formation of NO x is widely believed to occur primarily in regions of the flame where there exist both high temperatures and an abundance of oxygen. Since ethylene furnaces are amongst the highest temperature furnaces used in the hydrocarbon processing industry, the natural tendency of burners in these furnaces is to produce high levels of NO x emissions.
- staging One technique for reducing NO x that has become widely accepted in industry is known as staging.
- the primary flame zone is deficient in either air (fuel-rich) or fuel (fuel-lean).
- the balance of the air or fuel is injected into the burner in a secondary flame zone or elsewhere in the combustion chamber.
- a fuel-rich or fuel-lean combustion zone is less conducive to NO x formation than an air-fuel ratio closer to stoichiometry.
- Staging results in reducing peak temperatures in the primary flame zone and has been found to alter combustion speed in a way that reduces NO x . Since NO x formation is exponentially dependent on gas temperature, even small reductions in peak flame temperature dramatically reduce NO x emissions. However this must be balanced with the fact that radiant heat transfer decreases with reduced flame temperature, while CO emissions, an indication of incomplete combustion, may actually increase as well.
- primary air refers to the air premixed with the fuel
- secondary, and in some cases tertiary, air refers to the balance of the air required for proper combustion.
- primary air is the air that is more closely associated with the fuel; secondary and tertiary air are more remotely associated with the fuel.
- the upper limit of flammability refers to the mixture containing the maximum fuel concentration (fuel-rich) through which a flame can propagate.
- one set of techniques achieves lower flame temperatures by using staged-air or staged-fuel burners to lower flame temperatures by carrying out the initial combustion at far from stoichiometric conditions (either fuel-rich or air-rich) and adding the remaining air or fuel only after the flame has radiated some heat away to the fluid being heated in the furnace.
- Flue gas the products of the combustion reaction
- steam are commonly used diluents.
- Such burners are classified as FGR (flue-gas-recirculation) or steam-injected, respectively.
- U.S. Patent No. 5,092,761 discloses a method and apparatus for reducing NO x emissions from premix burners by recirculating flue gas. Flue gas is drawn from the furnace through a pipe or pipes by the aspirating effect of fuel gas and combustion air passing through a venturi portion of a burner tube. The flue gas mixes with combustion air in a primary air chamber prior to combustion to dilute the concentration of O 2 in the combustion air, which lowers flame temperature and thereby reduces NO x emissions.
- the present invention relates to a burner for use in furnaces such as in steam cracking.
- the burner is located within a first flame opening in a furnace and includes a primary air chamber, a burner tube including a downstream end, an upstream end in fluid communication with the primary air chamber and a burner tip mounted on the downstream end of the burner tube and directed to the first flame opening in the furnace so that combustion of the fuel takes place downstream of the burner tip, at least one flue gas recirculation duct having a first end at a second opening in the furnace and a second end opening into the primary air chamber, and a wall extending into the furnace between the first flame opening and the first end of the flue gas recirculation duct to substantially lengthen a flow path therebetween and thereby providing a substantial barrier to flow.
- the present invention effectively moves the entrance of the FGR duct opening further away from the flame to avoid or at least minimize flame entrainment. Therefore, the amount of flue gas recirculation can be increased to reduce overall flame temperature and therefore reduce NO x production.
- furnace herein shall be understood to mean furnaces, boilers and other applicable process components.
- a burner 10 includes a freestanding burner tube 12 located in a well in a furnace floor 14.
- the burner tube 12 includes an upstream end 16, a downstream end 18 and a venturi portion 19.
- a burner tip 20 is located at the downstream end 18 and is surrounded by an annular tile 22.
- a fuel orifice 11, which may be located within gas spud 24 is at the top end of a gas fuel riser 65 and is located at the upstream end 16 and introduces fuel into the burner tube 12.
- Fresh or ambient air is introduced into a primary air chamber 26 through opening 80 through an adjustable damper 28 to mix with the fuel at the upstream end 16 of the burner tube 12 and pass upwardly through the venturi portion 19. Combustion of the fuel and fresh air occurs downstream of the burner tip 20.
- a plurality of air ports 30 originate in a secondary air chamber 32 and pass through the furnace floor 14 into the furnace. Fresh or ambient air enters the secondary air chamber 32 through adjustable dampers 34 and passes through the staged air ports 30 into the furnace to provide secondary or staged combustion, as described in U.S. Patent No. 4,629,413 .
- Unmixed low temperature fresh or ambient air having entered the secondary air chamber 32 through the dampers 34, and having passed through the air ports 30 into the furnace, is also drawn through a flue gas recirculation (FGR) duct 76 into a primary air chamber 26 by the inspirating effect of the fuel passing through the venturi portion 19.
- FGR flue gas recirculation
- an aspect of the instant invention angles the FGR duct 76 outwardly at 84 such that the opening 82 of the duct 76 is physically further spaced away from the base of the burner tip 20.
- the angled FGR duct inlet 84 thus avoids or at least reduces the potential for the burner flame to be entrained into the FGR duct 76.
- This embodiment enables higher flue gas recirculation (FGR) rates to be induced into the burner 10. Such higher FGR rates, in turn, reduce overall flame temperature and NO x production.
- a flame opening 23 is circular and has a radius R, and the distance (d) that the duct opening 82 is laterally spaced from the flame opening 23 is defined by d ⁇ 0.5R for avoiding entrainment of the flame into the duct opening 82.
- the angle outward at 84 also permits the continued use of the relatively small burner box 17. It should be noted that such FGR burners may be in the order of 6 feet in height by 3 feet in width.
- steam injection tubes 15 which may or may not be present.
- Steam can be injected in the primary air or the secondary air chamber. Preferably, steam may be injected upstream of the venturi portion 19.
- An optional embodiment of the invention serves to further increase the effective distance between the opening 82 of the FGR duct 76 and the base of the burner flame.
- a physical wall 95 is installed between the burner tip 20 and the opening 82 to the FGR duct 76.
- the wall 95 also avoids or at least reduces the potential for the burner flame to be entrained into the FGR duct 76, and therefore enables higher flue gas recirculation (FGR) rates to be induced into the burner 10.
- FGR flue gas recirculation
- wall 95 may be straight as shown in FIG. 3A , curved as shown in FIG. 3B or other shapes as would be obvious to one of skill in the art.
- Flue gas containing, for example, 0 to 15% O 2 is drawn from near the furnace floor through the duct 76 with 5 to 15% O 2 preferred, 2 to 10% O 2 more preferred and 2 to 5% O 2 particularly preferred, by the inspirating effect of fuel passing through venturi portion 19 of burner tube 12.
- the primary air and flue gas are mixed in primary air chamber 26, which is prior to the zone of combustion. Therefore, the amount of inert material mixed with the fuel is raised, thereby reducing the flame temperature and, and as a result, reducing NO x emissions.
- Closing or partially closing damper 28 restricts the amount of fresh air that can be drawn into the primary air chamber 26 and thereby provides the vacuum necessary to draw flue gas from the furnace floor.
- a mixture of from 20% to 80% flue gas and from 20% to 80% ambient air should be drawn through passageway 76. It is particularly preferred that a mixture of 50% flue gas and 50% ambient air be employed.
- the desired proportions of flue gas and ambient air may be achieved by proper placement and/or design of the duct 76 in relation to the air ports 30. That is, the geometry of the air ports, including but not limited to their distance from the burner tube, the number of air ports, and the size of the air ports, may be varied to obtain the desired percentages of flue gas and ambient air.
- one or more steam injection tubes 15 may be provided so as to be positioned in the direction of flow so as to add to the motive force provided by venturi portion 19 for inducing the flow of fuel, steam and flue gas, air and mixtures thereof into the burner tube 12.
- a burner 10 includes a freestanding burner tube 12 located in a well in a furnace floor 14.
- the burner tube 12 includes an upstream end 16, a downstream end 18 and a venturi portion 19.
- a burner tip 20 is located at the downstream end 18 and is surrounded by an annular tile 22.
- a fuel orifice 11, which may be located in gas spud 24, is at the top end of a gas fuel riser 65 and is located at the upstream end 16 and introduces fuel into the burner tube 12.
- Fresh or ambient air is introduced into a primary air chamber 26 through an adjustable damper 28 to mix with the fuel at the upstream end 16 of the burner tube 12 and pass upwardly through the venturi portion 19. Combustion of the fuel and fresh air occurs downstream of the burner tip 20.
- a plurality of air ports 30 originate in a secondary air chamber 32 and pass through the furnace floor 14 into the furnace. Fresh or ambient air enters the secondary air chamber 32 through adjustable dampers 34 and passes through the staged air ports 30 into the furnace to provide secondary or staged combustion, as described in U.S. Patent No. 4,629,413 .
- Unmixed low temperature fresh or ambient air having entered the secondary air chamber 32 through the dampers 34, and having passed through the air ports 30 into the furnace, is also drawn through a passageway 76 into a primary air chamber 26 by the inspirating effect of the fuel passing through the venturi portion 19.
- the passageway 76 is shown as a metallic FGR duct.
- a wall 60 encircles the burner tip 20 mounted on the downstream end 18 of the burner tube 12 to provide a barrier between a base of a flame downstream of the burner tip 20 and both the second opening 76 in the furnace and the at least one air port 30.
- the wall 60 is perforation-free to prevent flow of flue gas and air therethrough.
- the wall 60 has a plurality of wall openings 61 spaced therearound.
- the openings 61 are rectangular in shape, and are located at the base of the wall 60 and spaced around the wall.
- the advantage achieved by the use of the openings 61 lies in their alignment, which is optimized to reduce the amount of oxygen from the staged air ports 30 that reaches the flame, reducing the level of interaction of oxygen with the flame.
- each wall opening is aligned so as to maximize the effective flow path from the air ports to the flame.
- flue gas is permitted to advantageously enter the flame, enabling a reduction in NO x emission levels.
- each one of the air ports 30 is positioned between adjacent wall openings 61 to minimize the amount of oxygen flowing from the air ports 30 through the wall openings 61 to the base of the flame.
- Sight and lighting port 50 provides access to the interior of burner 10 for a lighting element (not shown).
- FIGS. 8 and 9 wherein like numbers refer to like elements, another embodiment of the present invention is illustrated.
- the teachings above with respect to the separation wall and angled duct of the present invention may be applied in connection with a furnace having one or more burners and utilizing an external FGR duct 376 in fluid communication with a furnace exhaust 300.
- several burners 310 may be located within the furnace, all of which may feed furnace exhaust 300 into external FGR duct 376.
- wall 60, encircling the burner tip 20 mounted on the downstream end 18 of the burner tube 12 provides a barrier between a base of a flame at the burner tip 20 and the at least one air port 30.
- FIGS. 10 and 11 illustrate a flat-flame burner embodiment similar to the novel burner arrangement illustrated in FIG. 1 while FIGS. 12 and 13 illustrate a flat-flame burner embodiment similar to the novel burner arrangement illustrated in FIG. 4 .
- a burner 110 includes a freestanding burner tube 112 located in a well in a furnace floor 114.
- Burner tube 112 includes an upstream end 116, a downstream end 118 and a venturi portion 119.
- Burner tip 120 is located at downstream end 118 and is surrounded by a peripheral tile 122.
- a fuel orifice 111 which may be located within gas spud 124 is located at upstream end 116 and introduces fuel into burner tube 112.
- Fresh or ambient air may be introduced into primary air chamber 126 to mix with the fuel at upstream end 116 of burner tube 112. Combustion of the fuel and fresh air occurs downstream of burner tip 120.
- Fresh secondary air enters secondary chamber 132 through dampers 134.
- a flue gas recirculation passageway 176 is formed in furnace floor 114 and extends to primary air chamber 126, so that flue gas is mixed with fresh air drawn into the primary air chamber from opening 180 through dampers 128.
- Flue gas containing, for example, 0 to 15% O 2 is drawn through passageway 176 by the inspirating effect of fuel passing through venturi portion 119 of burner tube 112.
- Primary air and flue gas are mixed in primary air chamber 126, which is prior to the zone of combustion.
- fuel orifice 111 which may be, located within gas spud 124 discharges fuel into burner tube 112, where it mixes with primary air, recirculated flue-gas or mixtures thereof.
- the mixture of fuel and recirculated flue-gas, primary air or mixtures thereof then discharges from burner tip 120.
- the mixture in the venturi portion 119 of burner tube 112 is maintained below the fuel-rich flammability limit; i.e. there is insufficient air in the venturi to support combustion.
- Secondary air is added to provide the remainder of the air required for combustion. The majority of the secondary air is added a finite distance away from the burner tip 120
- one or more steam injection tubes 115 may be provided so as to be positioned in the direction of flow so as to add to the motive force provided by venturi portion 119 for inducing the flow of fuel, steam and flue gas, air and mixtures thereof into the burner tube 112.
- the FGR duct 176 may be angled outwardly at 184 such that the opening 182 of the duct 176 is physically further spaced away from the base of the burner tip 120.
- the angled FGR duct inlet 184 thus avoids or at least reduces the potential for the burner flame to be entrained into the FGR duct 176. This enables higher flue gas recirculation (FGR) rates to be induced into the burner 110. Such higher FGR rates, in turn, reduce overall flame temperature and NO x production.
- FGR flue gas recirculation
- the angle outward at 184 also permits the continued use of the relatively small burner box 117. It should be noted that such FGR burners may be on the order of 6 feet in height by 3 feet in width.
- the benefits of the present invention in connection with a flat-flame burner embodiment may be further enhanced by increasing the effective distance between the opening 182 of the FGR duct 176 and the base of the burner flame.
- a physical wall 195 as described above is installed between the burner tip 120 and the opening 182 to the FGR duct 176.
- the wall also avoids or at least reduces the potential for the burner flame to be entrained into the FGR duct 176, and therefore enables higher flue gas recirculation (FGR) rates to be induced Into the burner 110.
- FGR flue gas recirculation
- a wall 160 peripherally surrounds the burner tip 120 mounted on the upstream end 116 of the burner tube 112 to provide a barrier between a base of a flame at the burner tip 120 and both of the second opening 176 in the furnace and the at least one air port (not shown).
- the wall 160 reduces the amount of oxygen flowing into the base of said flame.
- a pre-mix burner employing flue gas recirculation of the type described In U.S. Patent No. 5,092,761 , without a wall encircling the burner tip to provide a barrier between the base of the flame and both the flue gas recirculation duct and the secondary air ports, of the present invention, was operated at a firing rate of 6.119 million kJ/hr (5.8 million BTU/hr.), using a fuel gas comprised of 30% H2/70% natural gas. The burner yielded NOx emissions of 49 ppm.
- a wall encircling the burner tip to provide a barrier between the base of the flame and both the flue gas recirculation duct opening and the secondary air ports of the present invention was Installed In the pre-mix burner of Example 1.
- the burner was operated at a firing rate of 6.473 million kJ/hr (6.135 million BTU/hr.), with a fuel gas comprised of 30% H2/70% natural gas.
- the NOx emissions were observed to be 46.11 ppm.
- burners of this invention have been described in connection with floor-fired hydrocarbon cracking furnaces, they may also be used in furnaces for carrying out other reactions or functions.
- flue gas recirculation system and methodologies described herein also has utility in raw gas burners having a pre-mix burner configuration wherein flue gas alone is mixed with fuel gas at the entrance to the burner tube.
- pre-mix, staged-air burners of the type described in detail herein can be operated with the primary air damper doors closed, with very satisfactory results.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36513902P | 2002-03-16 | 2002-03-16 | |
US36522402P | 2002-03-16 | 2002-03-16 | |
US365139P | 2002-03-16 | ||
US365224P | 2002-03-16 | ||
PCT/US2003/008056 WO2003081135A1 (en) | 2002-03-16 | 2003-03-14 | BURNER DESIGN WITH HIGHER RATES OF FLUE GAS RECIRCULATION AND REDUCED NOx EMISSIONS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1488171A1 EP1488171A1 (en) | 2004-12-22 |
EP1488171B1 true EP1488171B1 (en) | 2008-05-07 |
Family
ID=33422737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03728252A Expired - Lifetime EP1488171B1 (en) | 2002-03-16 | 2003-03-14 | BURNER DESIGN WITH HIGHER RATES OF FLUE GAS RECIRCULATION AND REDUCED NOx EMISSIONS |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1488171B1 (ja) |
JP (1) | JP4264005B2 (ja) |
AT (1) | ATE394635T1 (ja) |
AU (1) | AU2003233405A1 (ja) |
DE (1) | DE60320771D1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108266727B (zh) * | 2018-02-12 | 2024-04-02 | 岳阳恒盛石化科技有限公司 | 一种烟气内循环超低NOx排放燃气燃烧器 |
KR102632470B1 (ko) * | 2019-08-02 | 2024-02-01 | 주식회사 엘지화학 | 질소 산화물 저감형 버너 |
JP7161639B1 (ja) * | 2022-04-28 | 2022-10-26 | 三菱重工パワーインダストリー株式会社 | ガスバーナ、及び燃焼設備 |
-
2003
- 2003-03-14 EP EP03728252A patent/EP1488171B1/en not_active Expired - Lifetime
- 2003-03-14 AU AU2003233405A patent/AU2003233405A1/en not_active Abandoned
- 2003-03-14 AT AT03728252T patent/ATE394635T1/de not_active IP Right Cessation
- 2003-03-14 DE DE60320771T patent/DE60320771D1/de not_active Expired - Lifetime
- 2003-03-14 JP JP2003578825A patent/JP4264005B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
AU2003233405A1 (en) | 2003-10-08 |
JP4264005B2 (ja) | 2009-05-13 |
DE60320771D1 (de) | 2008-06-19 |
ATE394635T1 (de) | 2008-05-15 |
EP1488171A1 (en) | 2004-12-22 |
JP2006501427A (ja) | 2006-01-12 |
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