EP3728949A1 - Brûleur et ensemble de brûleurs compacts - Google Patents
Brûleur et ensemble de brûleurs compactsInfo
- Publication number
- EP3728949A1 EP3728949A1 EP18827212.4A EP18827212A EP3728949A1 EP 3728949 A1 EP3728949 A1 EP 3728949A1 EP 18827212 A EP18827212 A EP 18827212A EP 3728949 A1 EP3728949 A1 EP 3728949A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- air inlet
- inlet tube
- diameter
- gas injection
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 claims abstract description 62
- 239000007924 injection Substances 0.000 claims abstract description 62
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 44
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 74
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 40
- 238000002485 combustion reaction Methods 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
-
- 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
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- 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
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/02—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in parallel arrangement
-
- 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
- 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
-
- 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
- F23D14/84—Flame spreading or otherwise shaping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D23/00—Assemblies of two or more burners
-
- 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
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/06043—Burner staging, i.e. radially stratified flame core burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2203/00—Gaseous fuel burners
- F23D2203/007—Mixing tubes, air supply regulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2205/00—Assemblies of two or more burners, irrespective of fuel type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
- F23D2209/20—Flame lift-off / stability
-
- 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
- F23D2900/00015—Pilot burners specially adapted for low load or transient conditions, e.g. for increasing stability
-
- 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
- F23D2900/11401—Flame intercepting baffles forming part of burner head
-
- 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
- F23D2900/14701—Swirling means inside the mixing tube or chamber to improve premixing
Definitions
- the present invention relates to a burner and a set of industrial gas burners. These burners emit nitrogen oxides (NOx) which are sources of pollution.
- NOx nitrogen oxides
- the installations are of various shapes and the burner must be able to adapt as much as possible to the geometries of the combustion chambers.
- the object of the invention is a compact gas burner based on premixing technology and consists of a single gas inlet.
- This burner constitutes an elementary module developing a low-NOx and low-CO flame of controlled shape and adapted to the shape of the combustion chamber.
- the object of the invention is also the combination of several elementary modules in an assembly which makes it possible to obtain a greater thermal power while maintaining a low level of NOx and CO emissions. It also increases the variability of the assembly to allow more flexibility in power management.
- the premix burner according to the invention consists of an air inlet tube of length L and a specific injection of gas, said injection of gas comprises an upstream gas injector, a mixer, a downstream gas injection located at a distance L3 from an upstream end of the air inlet tube and a stabilizing element, it is characterized in that the Gas injection is a one-piece mechanical assembly providing a free-standing elementary flame.
- the burner is thus more compact and simpler.
- the air inlet tube has a length L and a diameter D1, such that the length L is between three and six times the diameter D1. This dimension makes it possible to obtain a burner that is both compact and efficient.
- the upstream gas injector is located at a distance L1 from an upstream end of the air inlet tube between 0.5 times the diameter D1 and the length L.
- the upstream gas injector comprises at least two axis elements x and x 'arranged radially to the air inlet tube, each element having gas injection holes disposed along its axis.
- the upstream gas injector comprises at least two mixing elements of axis y and y 'inclined with respect to the radius of the air inlet tube and connecting the air inlet tube and the injection duct gas and each mixing element has gas injection holes disposed along its axis y or y '. This simultaneously ensures turbulence likely to promote the mixing of gas and air and to minimize the pressure drop on the air side.
- upstream gas injector above can be used in other types of burners of those described above.
- the object of the upstream gas injector described above consists of ensuring the two functions of gas injection and mixing via a single mechanical part.
- the upstream gas injection makes it possible to minimize the pressure drop by an aerodynamic shape and to create turbulence by a twisted shape inclined relative to the radius of the air inlet tube.
- the diffuser is located at a distance L4 from an upstream end of the air inlet tube between L and L - D1.
- the diffuser has a section less than or equal to 0.5 times the section of the air inlet tube.
- the diffuser comprises a stabilization element of diameter D5 and a concentrator of diameter D8 and length L7, the stabilizing element is pierced with holes distributed over two concentric circles of diameter D6 and D7, that D7 ⁇ D8 ⁇ D6 and that the length L7 is between 0 and D5.
- the combination of the diffuser and concentrator above may be used for other types of burners than those described in this description.
- gas and air In order to achieve ultra-low NOx performance using premixing technology, gas and air must be supplied in specific proportions while remaining within the flammable range of the gas to be burned.
- the flammability range of methane, the main constituent of natural gas is between 5% and 15%.
- the flammability range of methane is then defined as: 0.66 ⁇ R ⁇ 2
- the stabilizing element is in the form of a cylindrical disk and comprises a plurality of calibrated section holes and arranged on different diameters and a concentrator mechanically connected to the stabilizing element upstream thereof.
- downstream gas injection is located at a distance L3 from an upstream end of the air inlet tube between L4 - (0.5 x D1) and L4.
- the air inlet tube is extended by mechanical protection walls of the flame.
- post-combustion burners are installed downstream of gas turbines (cogeneration).
- the burners When the turbine is stopped, the burners must be able to operate in fresh air mode while complying with the environmental regulations in force (NOx and CO). In this operating mode, the burners function to heat large volumes of air.
- the set of burners, object of the present invention makes it possible to obtain low NOx values thanks to the premixing technology.
- premix flames In order to limit CO emissions below regulatory values, premix flames must be protected from the flow of fresh air from the sheath, in order to avoid rapid cooling phenomena of the flame (quenching), at the origin of the formation of unburnt gas (CO).
- the mechanical protective walls of the flame have a diameter D2 between the diameter D1 of the air inlet tube and 5 ⁇ D1.
- the mechanical protection walls of the flame have an angle of inclination a2 relative to the axis of the burner between 0 ° and 20 °.
- a peripheral gas injection is located at a distance L6 from an upstream end of the air inlet tube such that:
- a gas injection is disposed at the periphery of the air inlet tube.
- This peripheral gas injection which is necessary in certain industrial applications, is performed in such a way as to:
- the mixer is located at a distance L2 from an upstream end of the air inlet tube such that:
- the mixer has a section less than or equal to 0.5 times the section of the air inlet tube.
- the burner assembly comprises a second secondary air tube of diameter D4 concentric with the air tube of diameter D1 such that D4> D1. The injection of gas into the annular space between the air inlet tube and the second tube makes it possible to suck by a venturi effect a part of the air flow required for premixing combustion, thereby reducing the total pressure drop of the burner and increases the power of the burner.
- an intermediate gas injection is located at a distance L8 from the upstream end of the air inlet tube such that L8> 0.
- the assembly according to the invention is characterized in that it comprises a number Nmax of burners, said burners having at least one of the preceding characteristics.
- the burners are preferably juxtaposed in the fireplace and may have several gas inlets or a single arrival for all.
- the number Nmax of burners develop a power between Pmax and Pmin
- the assembly is able to operate with a number Nmin of burners and its power is variable according to the number N of burners in operation, such as its power variation.
- Vp (Nmax x Pmax) / (Nmin x Pmin).
- the burner assembly comprises m peripheral gas injections, such as m> 1. This makes it possible to obtain an assembly with greater power for the same size.
- the purpose of the gas injection associated with the burner assembly is to reduce the excess of air in exploitable proportions and to limit the elongation of the flame in the combustion chamber.
- This gas injection is disposed at the periphery of the burner assembly and can be offset backward with respect to the air inlet tube.
- FIG. 1 represents a section of a burner according to the invention
- FIG. 1a is a front view of the burner of FIG. 1,
- FIG. 2 is a section of a burner with mechanical flame protection walls
- FIG. 3 is a section of a burner with peripheral gas injections
- FIG. 4 is a section of a burner with a second concentric tube of air
- FIG. 5a is a section of the diffuser
- FIG. 5b is a front view of the diffuser of FIG. 5a;
- FIG. 6 is a front view of the air inlet with gas injections according to a first embodiment,
- FIG. 7 is a front view of the air inlet with gas injections according to a second embodiment
- FIGS. 8a and 8b show different arrangements of burners in a set of burners according to the invention
- FIG. 9 is a set of burners with gas injections
- FIGS 10 and 1 1 show different examples of possible settings of burners used in applications of the minerals industry
- Figures and 12a, 12b and 12c are examples of diffusers.
- the burner 1 illustrated in FIG. 1 comprises an air inlet tube 2 of length L and X axis, a specific gas injection system 3 in one piece and composed of several elements:
- a stabilizing element such as a diffuser air / gas 7 located at a distance L4 from the end of the air supply tube 2.
- the gas arrives according to the arrow G and the air according to the arrow A and the secondary air according to the arrow A2.
- the gas arrives through the specific gas injection system 3 through the conduit 31 to exit by the upstream gas injection 4 and the downstream gas injection 6.
- the air meanwhile, flows in the arrival tube of air 2.
- the upstream gas injection 4 is detailed in FIGS. 6 and 7.
- FIG. 6 it comprises two elements 40 arranged radially. They each depart from the gas supply duct 31 and extend to the air inlet tube 2. These elements 40 are perforated with holes 400 arranged in downstream part. The holes 400 are either aligned in the middle or on the sides, or distributed in staggered rows as in FIG.
- the elements 41 are inclined with respect to the radius of the air inlet tube 2 and each start from the gas supply duct 31 and extend to the arrival tube 2. They can have an aerodynamic shape.
- the diffuser 7 is detailed in FIGS. 5a and 5b. It consists of a disk 71, of diameter D5, pierced with holes 72 and a concentrator 73.
- the concentrator 73 is cylindrical in shape with a diameter D8 and length L7.
- the holes 72 are arranged on different concentric diameters: D6 and D7.
- a series of 720 holes of diameter D6 is disposed outside the concentrator 73 and a series of holes 721 of diameter D7 is disposed inside the concentrator 73.
- the downstream gas injection 6 is placed inside the concentrator 73. In the illustrated example there are only two series of 720 and 721 holes, but there may be more.
- FIG. 2 shows a mechanical flame protection system 82 located inside the hearth 8, it consists of a conically shaped wall of length L5 of minimum inside diameter D2 and located at downstream end 21 of the air inlet tube 2.
- the cone is at an angle ⁇ 2 relative to the axis X of the tube 2.
- the gas injections have not been shown in this FIG.
- Peripheral gas injections 10 are arranged on the direct outer periphery of the air inlet tube 2 in the example of FIG. 3. They are fed by the specific gas injection system 3 of the burner 1. better to provide preferably two injections symmetrical with respect to the axis X in order to balance the flame 82.
- the air inlet tube 2 is surrounded by a second concentric secondary air inlet tube 22 and the same length, intermediate gas injections January 1 are arranged in a space annular 23 defines by the two tubes 2 and 22. These injections of intermediate gas 1 1 enter the annular space 23 of a length L8.
- the length L8 must be non-zero to prevent the gas being sent elsewhere than in the annular space.
- Stabilizing elements, such as diffusers 70, are placed at the outlet of the annular space 23.
- FIGS 10 and 1 1 illustrate different burner settings according to the invention that can be used in the mineral industry with premix technology with air factors R. The gas injections were not shown in these two figures.
- the premix is adjusted with an air factor R between 1 and 2. It can be seen that in this case the flame 82 is long and therefore the secondary air is introduced directly into the flame 82. who trains He
- the premix is set with an air factor R between 0.25 and 1.
- the flame 82 is short and, as a result, the introduction of the secondary air is delayed. after the flame 82 which causes a combustion in air defect and a low amount of NOx both in the primary zone 80 and the secondary zone 81, there is then a "reburning" effect.
- Figures 12a, 12b and 12c show different variants of diffusers 7.
- the burners 1 are arranged in a furnace 8 in different arrangements to form an assembly 12 of burners 1 such as those illustrated in FIGS. 8a, 8b or 9.
- the number and arrangement of the burners as a whole depend on the type of application concerned. and the desired power.
- the burners 1 are aligned vertically along two vertical rows of burners and two additional burners are arranged on each side in the middle in order to concentrate the flame 82.
- the burners 1 are horizontally aligned in a single line.
- the burners 1 are vertically aligned along several vertical lines and peripheral gas injections 10 are placed on the periphery of the hearth 8. It is possible to have other peripheral injections at other places of the hearth 8.
- the measured values are as follows:
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1762740A FR3075931B1 (fr) | 2017-12-21 | 2017-12-21 | Bruleur et ensemble de bruleurs compacts |
PCT/FR2018/053051 WO2019122566A1 (fr) | 2017-12-21 | 2018-11-29 | Brûleur et ensemble de brûleurs compacts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3728949A1 true EP3728949A1 (fr) | 2020-10-28 |
EP3728949B1 EP3728949B1 (fr) | 2023-03-08 |
Family
ID=61873465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18827212.4A Active EP3728949B1 (fr) | 2017-12-21 | 2018-11-29 | Brûleur et ensemble de brûleurs compacts |
Country Status (9)
Country | Link |
---|---|
US (1) | US20200309364A1 (fr) |
EP (1) | EP3728949B1 (fr) |
KR (1) | KR20200098542A (fr) |
CN (1) | CN111492180B (fr) |
ES (1) | ES2944436T3 (fr) |
FR (1) | FR3075931B1 (fr) |
LT (1) | LT3728949T (fr) |
PL (1) | PL3728949T3 (fr) |
WO (1) | WO2019122566A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3980687A4 (fr) * | 2019-07-10 | 2023-08-16 | Femas Metal San. Ve Tic. A.S. | Ensemble brûleur à gaz pour appareil de cuisson à gaz |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5193346A (en) * | 1986-11-25 | 1993-03-16 | General Electric Company | Premixed secondary fuel nozzle with integral swirler |
DE69515931T2 (de) * | 1994-06-10 | 2000-11-02 | Gen Electric | Regelung einer Gasturbinenbrennkammer |
US5471840A (en) * | 1994-07-05 | 1995-12-05 | General Electric Company | Bluffbody flameholders for low emission gas turbine combustors |
JP3416357B2 (ja) * | 1995-10-26 | 2003-06-16 | 三菱重工業株式会社 | 低NOxガスタービン燃焼器の予混合メインノズル |
JP3970244B2 (ja) * | 2001-07-10 | 2007-09-05 | 三菱重工業株式会社 | 予混合ノズルおよび燃焼器並びにガスタービン |
US8308477B2 (en) * | 2006-03-01 | 2012-11-13 | Honeywell International Inc. | Industrial burner |
RU2300702C1 (ru) * | 2006-04-04 | 2007-06-10 | Общество с ограниченной ответственностью "Научно-производственное предприятие "ЭСТ" | Способ сжигания топлива и устройство для его осуществления |
US8113821B2 (en) * | 2008-03-07 | 2012-02-14 | Hauck Manufacturing Company | Premix lean burner |
US8479519B2 (en) * | 2009-01-07 | 2013-07-09 | General Electric Company | Method and apparatus to facilitate cooling of a diffusion tip within a gas turbine engine |
CN104501208B (zh) * | 2014-11-27 | 2018-02-06 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | 燃气轮机燃烧室喷嘴 |
US20160186663A1 (en) * | 2014-12-30 | 2016-06-30 | General Electric Company | Pilot nozzle in gas turbine combustor |
CN106949471B (zh) * | 2017-04-19 | 2023-09-01 | 安德森热能科技(苏州)有限责任公司 | 一种低排放冷焰多级预混燃烧器 |
-
2017
- 2017-12-21 FR FR1762740A patent/FR3075931B1/fr active Active
-
2018
- 2018-11-29 KR KR1020207017827A patent/KR20200098542A/ko not_active Application Discontinuation
- 2018-11-29 PL PL18827212.4T patent/PL3728949T3/pl unknown
- 2018-11-29 ES ES18827212T patent/ES2944436T3/es active Active
- 2018-11-29 EP EP18827212.4A patent/EP3728949B1/fr active Active
- 2018-11-29 CN CN201880082830.XA patent/CN111492180B/zh active Active
- 2018-11-29 WO PCT/FR2018/053051 patent/WO2019122566A1/fr unknown
- 2018-11-29 LT LTEPPCT/FR2018/053051T patent/LT3728949T/lt unknown
- 2018-11-29 US US16/760,275 patent/US20200309364A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
PL3728949T3 (pl) | 2023-06-26 |
FR3075931B1 (fr) | 2020-05-22 |
ES2944436T3 (es) | 2023-06-21 |
FR3075931A1 (fr) | 2019-06-28 |
US20200309364A1 (en) | 2020-10-01 |
LT3728949T (lt) | 2023-05-25 |
CN111492180B (zh) | 2023-12-08 |
WO2019122566A1 (fr) | 2019-06-27 |
CN111492180A (zh) | 2020-08-04 |
KR20200098542A (ko) | 2020-08-20 |
EP3728949B1 (fr) | 2023-03-08 |
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