WO2019223848A1 - Buse de brûleur - Google Patents

Buse de brûleur Download PDF

Info

Publication number
WO2019223848A1
WO2019223848A1 PCT/EP2018/063255 EP2018063255W WO2019223848A1 WO 2019223848 A1 WO2019223848 A1 WO 2019223848A1 EP 2018063255 W EP2018063255 W EP 2018063255W WO 2019223848 A1 WO2019223848 A1 WO 2019223848A1
Authority
WO
WIPO (PCT)
Prior art keywords
body part
outlet
burner nozzle
center axis
flow channel
Prior art date
Application number
PCT/EP2018/063255
Other languages
English (en)
Inventor
Odd Ivar LINDLØV
Ralph Gunnar HATTEVIG
Joachim LUNDBERG
Original Assignee
Wärtsilä Moss As
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wärtsilä Moss As filed Critical Wärtsilä Moss As
Priority to PCT/EP2018/063255 priority Critical patent/WO2019223848A1/fr
Priority to KR1020207033416A priority patent/KR102390242B1/ko
Priority to EP18726777.8A priority patent/EP3797247B1/fr
Priority to FIEP18726777.8T priority patent/FI3797247T3/fi
Priority to CN201880093583.3A priority patent/CN112189112B/zh
Publication of WO2019223848A1 publication Critical patent/WO2019223848A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/106—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting at the burner outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/12—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour characterised by the shape or arrangement of the outlets from the nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/38—Nozzles; Cleaning devices therefor

Definitions

  • the present invention relates to burner nozzle for atomizing liquid fuel with assistance of compressed gas, comprising a first outlet for compressed gas, having a center axis and a second outlet for liquid fuel according to the preamble of claim 1.
  • Liquefied gas such as liquefied natural gas
  • liquefied natural gas is typically stored at ex- tremely low temperature and due to e.g. heat transfer from surrounding a part of the gas is evaporated as so called boil off gas. Admitting the boil off gas to the atmosphere is not desired. It is known as such to burn excess gas to convert it into composition significantly less harmful to the environment.
  • Such liquefied gas tanks and a fuel handling system requires also inerting of the spaces related to the tanks, pipes and so on for example for maintenance work. It is known as such to burn the gas present in the tanks and their auxiliaries to convert it into composition of non-reactive gas i.e. inert gas.
  • KR20150096540 discloses a method of combusting and providing inert gas forfilling a storage tank by the inert gas.
  • inert gas forfilling a storage tank by the inert gas.
  • boil-off gas flaring arrangements it is referred to publication WO 00/47463 A1.
  • Inert gas generators and boil off gas flaring arrangements often require an auxiliary burner configured to burn liquid fuel for supporting the combustion of diluted boil-off gas.
  • a critical component in a burner is the fuel nozzle.
  • the air and the fuel needs to be mixed in a proper and con- trolled manner.
  • a large turn -down ratio is required; that is, being able to maintain both the atom- ization grade i.e. ensuring a monodisperse and predictable spray and spray an- gle over a large output range.
  • Invention relates particularly to liquid fuel nozzle in which the liquid fuel is atomized with assistance of a compressed gas, preferably air.
  • a burner nozzle for atomiz- ing liquid fuel with assistance of compressed gas comprises a first outlet for corn- pressed gas, having a center axis and a second outlet for liquid fuel.
  • the second outlet is arranged rotationally symmetrically around the first outlet in respect to the center axis, the first outlet comprises an outwardly extending conical portion, and the burner nozzle comprises a gas dispersing element which is arranged to the center axis at a distance from and coaxially with the first outlet in the direction away from the first outlet.
  • the second outlet comprises an annular slit arranged coaxially with the first outlet.
  • the second outlet is arranged axially at the end of the first outlet.
  • the dispersing element is rotationally symmetrical in respect to the center axis and arranged to extend in axial direction.
  • the radial dimension of the dispersing element is arranged to increase as the distance from the first outlet increases.
  • the dispersing element is conical having its apex towards the first outlet.
  • the burner nozzle has a body assembly comprises a first body part and a second body part, wherein the first body part comprises a gas flow channel arranged to extend through the first body part from a first end thereof to a second end, along the center axis, the second end of which gas flow channel constituting the first outlet, and a rotation- ally symmetrical outer surface in respect to the center axis, and wherein the sec- ond body part comprises a sleeve section axially extending over the outer surface of the first body part, wherein the sleeve section of the second body part and the outer surface of the first body part form an annular space between them, which annular space forms a fuel conduit and terminates to the second outlet.
  • the first body part and the second body part are provided with means for aligning and retaining the first body part and the second body part in coaxial relationship with each other.
  • the first body part compris- ing a first flange part arranged at the first end of the first body part, and the sec- ond body part comprising a second flange part at a first end of the second body part, and that the first and the second flange parts are provided with mating forms configured to align and retain the first body part and the second body part in coaxial relationship with each other.
  • the gas flow channel corn- prises at a first end of the flow channel a flow channel section constricting to- wards the second end, followed by a flow channel extending to-wards the second end of the gas flow channel.
  • the dispersing element is fixed to the first body part.
  • the dispersing element is fixed to the second body part.
  • the liquid fuel such as diesel oil
  • a compressed gas typically air. This provides a possibility to use reduced fuel supply pressure. Also a more stable monodisperse spray over a large fuel flow rate range is obtained.
  • the nozzle may be modularized so that for ex- ample one second body part can be used in connection with a number of differ ently formed first body parts. This way the capacity of the fuel nozzle can be varied by changing only the first body part of the fuel nozzle.
  • FIG. 1 illustrates a burner nozzle according to an embodiment of the invention
  • Figure 2 illustrates a first body part of the burner nozzle according to an embod- iment of the invention
  • Figure 3 illustrates a second body part of the burner nozzle according to an em- bodiment of the invention.
  • FIG. 1 depicts schematically a burner nozzle 10 for atomizing liquid fuel with assistance of compressed gas according to an embodiment of the invention.
  • the nozzle is configured to be attached to a separate burner body or a nozzle tube in a burner body (not shown) via which liquid fuel and compressed gas, advantageously air, may be introduced into the nozzle 10, as is depicted by the respective arrows 12, 14, which also show the general flow direction of the fluids.
  • the fuel and the compressed air are then sprayed out of the nozzle 10 for atom- izing and thereafter burning the fuel.
  • the burner nozzle 10 is a twin fluid atomizer.
  • the nozzle utilizes a so called Air Centre Liquid Ring, where a thin annular liquid sheet is formed and upon exit is atomized using the expanding air exiting the centre outlet.
  • the burner nozzle 10 comprises a first outlet 16 for compressed gas.
  • the first outlet is arranged coaxially into a center axis 18 of the nozzle 10.
  • the com- pressed gas is used for assisting the atomization of liquid fuel introduced via the nozzle 10.
  • the nozzle 10 is also provided with a second outlet 20 for liquid fuel which is arranged rotationally symmetrically around the first outlet 16 in re- spect to the center axis 18.
  • the second outlet 20 is an annular slit 20 which is arranged coaxially with the first outlet.
  • the second outlet 20 is comprised of a number of sectional slits separated by narrow, radial support protrusions in either of body parts (not shown).
  • the purpose of the slit is to provide an annular film of liquid fuel to flow initially out of the nozzle 10, which is then effected by the flow of compressed gas.
  • the first outlet 16 comprises an outwardly extending conical portion 22, by means of which the flow of compressed gas is made to widen and directed to comprise a radial velocity component. In other words a radial cross sectional di- mension of the conical portion 22 is arranged to increase towards the actual out- let.
  • the fuel burner 10 further comprises a gas dispersing element 24, which is arranged to the center axis 18 at a distance from and coaxially with the first outlet 16 in the direction away from the first outlet 16.
  • the gas dispersing element 24 is formed so as to further direct the flow of compressed gas into a form of hollow cone, which facilitates the formation of cone-like flow pattern of the liquid fuel droplets and/or mist.
  • the dispersing element 24 is rotationally symmetrical in respect to the center axis 18.
  • the radial cross sectional dimension of the dispersing element 24 is arranged to increase as the distance from the first outlet 16 increases.
  • the dispersing element in the figure 1 is conical having its apex point towards the first outlet 16. This will set the fuel spray to the desired angle and keep this throughout the entire flow range of the nozzle and ensures that the fuel spray is monodisperse over a wide range, further assisting in keeping the air / fuel mixture optimized.
  • the first outlet 16 and the second outlet 20 are arranged to open at a common axial position i.e. the second outlet 20 is ar- ranged axially at the end of the first outlet 16. In the position shown in the figure
  • the burner nozzle comprises a body assembly 26 of distinct parts.
  • the body assembly 26 is described in more detail with a reference to the figures 2 and 3.
  • the assembly comprises a first body part 30, which is shown in the figure
  • FIG. 2A shows a side view of the first body 30 part such that the right side shows a sectional drawing of the first body part and the left side shows a front view of the first body part.
  • Figure 2B shows the first body part in the direction B of the figure 2A, that is from above in the figure.
  • Figure 3A shows a side view of the second body part such that the right side shows a sectional drawing of the second body part and the left side shows a front view of the second body part.
  • Figure 3B shows the second body part in the direction B of the figure 3A.
  • the first body part 30 comprises a gas flow channel 34, which is arranged to extend through the first body part from a first end 30’, i.e. an inlet end of the burner nozzle a second end 30” of the burner nozzle, along the center axis 18.
  • the gas flow channel 34 has a specific form such that the cross sectional area of the channel 34 is first gradually (shown by dashed line in the figure 2A) or stepwise constricted, beginning from the first end, such that there is a local con- striction 36 in the channel 34.
  • a second end of the gas flow channel constitutes the first outlet 16 which outlet has a rotationally symmetrical surface 16’ in the first body part 30, in re- spect to the center axis.
  • the outer surface is rotationally symmetrical, advanta- geously of a shape of a cone, a cross sectional dimension of which increases as the distance from the local constriction 36 increases.
  • the first body part 30 and the second body part 32 are provided with means 40 for aligning and retaining the first body part and the second body part in coaxial relationship with each other.
  • the first body part 30 is provided with flange part 38 at the first end 30’ thereof.
  • the first body part 30 comprises a first flange part 38 arranged at the first end 30’ of the first body part 30.
  • the first flange part 38 is provided which one or more alignment protrusions 40.
  • the protrusion 40 may be of different form. In the embodiment of figure 1 and 2 the protrusions 40 comprise two or more dowels or alike arranged to extend from otherwise generally flat surface of the flange part 38 towards second end 30’ of the first body part 30.
  • the protrusion may be also for example an annular ring protrusion.
  • the means 40 for aligning and retaining the first body part and the second body part in coaxial relationship with each other may also be con- structed as a specific form of the flange part 42 to provide the alignment effect by the form. In the figure 1 one can see how the first and the second body parts are aligned with each other when the dowels 40 are within the cavities 40’ and the flange parts 38,42 are tightly facing each other.
  • the first body part 30 is provided with a generally inwardly tapering outer surface 44, extending from the first flange part 36 in the direction from the first end 30’ to the second end 30”. More particularly the outer surface is in a form of a truncated cone in the figures.
  • the outer surface 44 borders partially a fuel con- duit formed between the first body part 30 and the second body part 32.
  • the first body part 30 is provided with axial openings 50 arranged to the first flange part 38.
  • the openings are arranged to a locations radially outside the outer surface 44 of the first body part 30 to open in the annular fuel conduit formed between the first body part 30 and the second body part 32 when the first and the second body parts are assembled as intended.
  • the openings 50 are formed in the first flange part 38 such that there is practically an annular opening around the outer surface 44.
  • the second body part 32 is provided with a second flange part 42 at a first end 30’ of the second body part 32.
  • the first and the second flange parts 38, 42 are provided with mating forms configured to align and retain the first body part 30 and the second body part 32 in coaxial relationship with each other. Therefore, the second flange part comprises one or more indenta- tions 40’ spaced and formed to mate with the protrusions in the first flange part 38 in the first body part 30.
  • the indentation 40 comprise two or more cylindrical cavities or alike arranged to otherwise gen- erally flat surface of the flange part 42.
  • the second body part 32 further comprises a sleeve section 46 which is axially extending from the second flange part 42 of the second body part 32.
  • the sleeve section has substantially cylindrical outer surface having a rounded sec- ond end 30” edge.
  • Internal surface 48 of the second body part is generally in- wardly tapering circular surface extending from the second flange part 42 in the direction from the first end 30’ to the second end 30”. More particularly the inter- nal surface 48 is in a form of a truncated cone in the figures.
  • An angle in respect to the center axis 18 of the truncated cone of the second body part 32 is greater than an angle of the truncated cone of the first body part 30.
  • the sleeve section 46 of the second body part 32 is over the outer surface 44 of the first body part 30, when assembled to the first body part 30 as is shown in the figure 1.
  • the second body part 32 has an opening 52 radially inside the flange part 42 and the sleeve section 46 into which opening the first body part 30 is assemblage such that the first flange part 36 is axially against the second flange part 42.
  • the sleeve section 48 of the second body part 32 and the outer surface 44 of the first body part 30 form an annular space 54 between them, which annular space connects the axial openings 50 in the first body part 30 to the second outlet 20 of the nozzle 10 and forms the fuel conduit formed between the first and the second part.
  • the dispersing element 24 is sup- ported from the nozzle by means of axially oriented bars or a like 28. There are three rotationally symmetrically arranged bars 28 arranged in the first body part which are fixed to the dispersing element 24.
  • the number of bars 28 can vary depending on the case. It is also conceivable that the dispersing element 24 can be supported by the bars from the second body part 46. However, is more advantageous to support the dispersing element from the first body part 30. That is because the bars 28 disturb less the formation of the fuel film, when it is only the gas, and not the liquid fuel, which need to flow passing the bars 28.
  • the dispersing element 24, when being in a form of a cone has advantageously a circular base.
  • the benefits of the invention at least to some extent, can be obtained by using cone-like dispersing element having a polygon having more than 5 regular sides (pentagon).
  • the dispersing element 24 is de- picted as a hollow cone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

La présente invention concerne une buse de brûleur (10) pour pulvériser un combustible liquide à l'aide d'un gaz comprimé, comprenant une première sortie (16) pour le gaz comprimé, ayant un axe central (18) et une seconde sortie (20) pour le carburant liquide. La seconde sortie (20) est disposée de manière symétrique en rotation autour de la première sortie (16) par rapport à l'axe central (18), la première sortie (16) comprend une partie conique s'étendant vers l'extérieur (22), et la buse de brûleur (10) comprend un élément de dispersion de gaz (24) qui est disposé sur l'axe central (18) à une certaine distance de la première sortie (16) et coaxialement à celle-ci dans la direction opposée à la première sortie (16).
PCT/EP2018/063255 2018-05-21 2018-05-21 Buse de brûleur WO2019223848A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/EP2018/063255 WO2019223848A1 (fr) 2018-05-21 2018-05-21 Buse de brûleur
KR1020207033416A KR102390242B1 (ko) 2018-05-21 2018-05-21 버너 노즐
EP18726777.8A EP3797247B1 (fr) 2018-05-21 2018-05-21 Buse de brûleur
FIEP18726777.8T FI3797247T3 (fi) 2018-05-21 2018-05-21 Polttimen suutin
CN201880093583.3A CN112189112B (zh) 2018-05-21 2018-05-21 燃烧器喷嘴

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/063255 WO2019223848A1 (fr) 2018-05-21 2018-05-21 Buse de brûleur

Publications (1)

Publication Number Publication Date
WO2019223848A1 true WO2019223848A1 (fr) 2019-11-28

Family

ID=62235948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/063255 WO2019223848A1 (fr) 2018-05-21 2018-05-21 Buse de brûleur

Country Status (5)

Country Link
EP (1) EP3797247B1 (fr)
KR (1) KR102390242B1 (fr)
CN (1) CN112189112B (fr)
FI (1) FI3797247T3 (fr)
WO (1) WO2019223848A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3974726A1 (fr) * 2020-09-29 2022-03-30 Pratt & Whitney Canada Corp. Buse de carburant et procédé d'assemblage correspondant
NO20201094A1 (en) * 2020-10-09 2022-04-11 Lindloev Odd Ivar A snowmaking nozzle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3240254A (en) * 1963-12-23 1966-03-15 Sonic Dev Corp Compressible fluid sonic pressure wave apparatus and method
US3534909A (en) * 1968-05-21 1970-10-20 Paine Thomas O Control valve and co-axial variable injector
GB1547770A (en) * 1975-09-06 1979-06-27 Rolls Royce Gas turbine engine fuel injectocorsvk
WO2000047463A1 (fr) 1999-02-12 2000-08-17 Moss Maritime As Dispositif de traitement de phase gazeuse de gaz naturel liquefie et utilisation d'un ensemble d'incineration destine a bruler une telle phase
DE10314941A1 (de) * 2003-04-02 2004-10-14 Alstom Technology Ltd Brennstoffinjektionseinrichtung für Gasturbinenbrenner
US20060278736A1 (en) * 2005-06-13 2006-12-14 Reilly William J High velocity low pressure emitter
KR20150096540A (ko) 2014-02-14 2015-08-25 광운대학교 산학협력단 비디오 부호화기 및 복호화기의 복잡도 예측 모델 설계 방법 및 장치

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB224911A (en) * 1923-11-16 1925-07-30 Henry Adams Improvement in atomizing jet nozzles
US4380429A (en) * 1979-11-02 1983-04-19 Hague International Recirculating burner
US20020090584A1 (en) * 2001-01-05 2002-07-11 Mohr Patrick J. Liquid fuel industrial burner
RU2450208C1 (ru) * 2010-10-11 2012-05-10 Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Дальневосточный Федеральный Университет" (Двфу) Распыливающий узел ротационной горелки для жидкого топлива

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3240254A (en) * 1963-12-23 1966-03-15 Sonic Dev Corp Compressible fluid sonic pressure wave apparatus and method
US3534909A (en) * 1968-05-21 1970-10-20 Paine Thomas O Control valve and co-axial variable injector
GB1547770A (en) * 1975-09-06 1979-06-27 Rolls Royce Gas turbine engine fuel injectocorsvk
WO2000047463A1 (fr) 1999-02-12 2000-08-17 Moss Maritime As Dispositif de traitement de phase gazeuse de gaz naturel liquefie et utilisation d'un ensemble d'incineration destine a bruler une telle phase
DE10314941A1 (de) * 2003-04-02 2004-10-14 Alstom Technology Ltd Brennstoffinjektionseinrichtung für Gasturbinenbrenner
US20060278736A1 (en) * 2005-06-13 2006-12-14 Reilly William J High velocity low pressure emitter
KR20150096540A (ko) 2014-02-14 2015-08-25 광운대학교 산학협력단 비디오 부호화기 및 복호화기의 복잡도 예측 모델 설계 방법 및 장치

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3974726A1 (fr) * 2020-09-29 2022-03-30 Pratt & Whitney Canada Corp. Buse de carburant et procédé d'assemblage correspondant
US11486581B2 (en) 2020-09-29 2022-11-01 Pratt & Whitney Canada Corp. Fuel nozzle and associated method of assembly
NO20201094A1 (en) * 2020-10-09 2022-04-11 Lindloev Odd Ivar A snowmaking nozzle
NO346615B1 (en) * 2020-10-09 2022-10-31 Lindloev Odd Ivar A snowmaking nozzle

Also Published As

Publication number Publication date
EP3797247B1 (fr) 2022-12-21
KR102390242B1 (ko) 2022-04-22
EP3797247A1 (fr) 2021-03-31
CN112189112B (zh) 2023-03-21
KR20210013055A (ko) 2021-02-03
CN112189112A (zh) 2021-01-05
FI3797247T3 (fi) 2023-03-24

Similar Documents

Publication Publication Date Title
US6539724B2 (en) Airblast fuel atomization system
CN103776061B (zh) 用于减少燃烧室脉动的消声器组件
JP2011163754A (ja) ガス・タービン用の燃焼器を制御する方法
JPS59145412A (ja) 水又は補助燃料を供給することのできる燃料噴射組立体
JP6879571B2 (ja) 流体流れを混合するノズルおよび方法
JP2011163753A (ja) 燃料噴射装置ノズル
JP5110635B2 (ja) 空気と燃料の混合物を噴射する装置、ならびにそのような装置が設けられた燃焼室とターボ機械
WO2019223848A1 (fr) Buse de brûleur
US9333518B2 (en) Multipoint injectors
CN103196158A (zh) 燃烧器和用于在燃烧器中分配燃料的方法
US7021562B2 (en) Macrolaminate direct injection nozzle
CN109114592A (zh) 燃烧系统和用于产生具预混合火焰特性的燃烧产物的方法
EP1503141A2 (fr) Brûleur à atomisation haute efficacité
JP2011163750A (ja) 燃料噴射装置ノズル
CA2893368C (fr) Buse de carburant
US3968931A (en) Pressure jet atomizer
JP4691436B2 (ja) 燃料噴霧チップ、燃料燃焼装置および燃料燃焼方法
WO2021066121A1 (fr) Chambre de combustion pour turbine à gaz, turbine à gaz, et procédé de combustion pour combustible pétrolier
US20170292696A1 (en) Combustor assembly for low-emissions and alternate liquid fuels
JP2007132548A (ja) 予混合装置
RU2656566C2 (ru) Форсунка кочетова для распыливания жидкостей
US4838783A (en) Dual burner facility with a fuel oil atomizer
RU2624153C1 (ru) Акустическая форсунка с распылительным диффузором
US11872583B2 (en) Counterflow mixer and atomizer
JP6615641B2 (ja) 遠心噴霧燃焼器およびこれを備えた飛昇体

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18726777

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018726777

Country of ref document: EP

Effective date: 20201221