EP3775742B1 - Anlage und brennerlanze fuer die weitere herstellung von weisszement - Google Patents

Anlage und brennerlanze fuer die weitere herstellung von weisszement Download PDF

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Publication number
EP3775742B1
EP3775742B1 EP19716842.0A EP19716842A EP3775742B1 EP 3775742 B1 EP3775742 B1 EP 3775742B1 EP 19716842 A EP19716842 A EP 19716842A EP 3775742 B1 EP3775742 B1 EP 3775742B1
Authority
EP
European Patent Office
Prior art keywords
tube furnace
rotary tube
cement clinker
burner lance
rotary kiln
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.)
Active
Application number
EP19716842.0A
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German (de)
English (en)
French (fr)
Other versions
EP3775742A1 (de
Inventor
Ravi SAKSENA
André SYBON
Alexander Knoch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag AG
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Publication of EP3775742A1 publication Critical patent/EP3775742A1/de
Application granted granted Critical
Publication of EP3775742B1 publication Critical patent/EP3775742B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/34—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/38—Arrangements of cooling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
    • F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
    • F27D2009/0016—Water-spray

Definitions

  • the invention relates to a plant for the production of cement clinker for the further production of white cement, having a rotary kiln for sintering calcareous and silicate-containing raw meal and optionally other oxides to form cement clinker, with a burner lance being present on the rotary kiln head of the rotary kiln to generate the necessary sintering temperature in the rotary kiln, and wherein the burner lance extends into the rotary kiln, and at least one conduit for conducting cooling water into the rotary kiln for quenching the sintered cement clinker while still in the rotary kiln.
  • This temperature difference thus requires a significantly higher temperature for sintering in the absence or shortage of iron oxide in the raw material, which increases the temperature in a rotary kiln used for sintering the cement clinker and also increases the necessary energy input.
  • the sintered cement clinker In addition to the increased use of energy compared to the production of gray Portland cement and the higher temperatures required, the sintered cement clinker must also be quenched much more intensively and quickly so that the desired and colorless clinker phases form. Without rapid cooling, other solid phases form in addition to the desired clinker phases in a very complex phase mixture, which leads to discoloration of the clinker.
  • German Offenlegungsschrift DE 2 041 834 discloses a device for the production of white cement, in which cement clinker is first sintered under strongly reductive conditions in a rotary kiln divided into two sections by a permeable partition and then quenched after exiting the lower chamber.
  • cooling water exits from nozzles which are arranged in the rotary kiln head housing in order to cool the thrown-on cement clinker by the cooling water being sprayed directly onto the clinker.
  • Dividing the rotary kiln into two is problematic because the passage openings can easily become clogged during operation due to cement clinker accumulations that have caked together. In such a case, the rotary kiln may break down.
  • German patent DE 1 178 769 teaches a method of firing white cement.
  • the idea is to spray the reducing agent and the water in close proximity to one another onto the cement clinker bed rolling in the rotary kiln in an area at the end of the rotary kiln via a combined pipe for injecting reducing agent and water. It is important that the spray cones of the reducing agent and the water do not overlap.
  • the supply pipes are exposed in the rotary kiln and are there directly exposed to the chemically/physically aggressive environment of the rotary kiln.
  • the object of the invention is to provide a plant for the production of cement clinker for the further production of white cement available which is robust and is reliable.
  • the cement clinker for the production of white cement should be able to be produced with high quality.
  • the burner lance has at least one line for conducting cooling water, the line for conducting cooling water opening out in the area between the burner mouth and the end of the rotary kiln head and spraying cooling water onto the sintered cement clinker.
  • Further advantageous configurations are specified in the subclaims to claim 1. A corresponding burner lance for such a system is also mentioned.
  • At least one cooling water line is part of the burner lance itself. Burner lance and cooling water line are integrated.
  • the burner lance thus provides the flame for heating the rotary kiln and at the same time provides a cooling medium.
  • the connection of the burner lance with the cooling water has several advantages.
  • the production of white cement requires significantly more energy than the production of gray cement, because the temperature required to sinter the cement clinker is not available due to the lack of iron oxide, which supports the sintering process in the production of gray cement by acting as a flux .
  • the higher use of energy also means a higher thermal load on the burner itself, which is usually protected from the heat in the rotary kiln by a jacket made of a refractory material, known in technical terms as "refractory”.
  • the burner lance is cooled by the primary air and the fuel, both of which flow through the burner lance itself. If, as provided according to the invention, a cooling water line is provided as part of the burner lance itself, this at least one line for conducting cooling water cools the burner lance so that the burner lance has a longer service life during operation.
  • Quenching the cement clinker with water while still in the rotary kiln has the well-known advantage that the reductive environment in the rotary kiln itself can be better controlled than when the cement clinker is cooled by atmospheric air outside the rotary kiln.
  • a reducing agent usually oil, fuel oil or another combustible medium, including gas, as a protective reducing agent. This creates the illegal effect that the reducing agent is usually used by generating even more heat in the immediate vicinity of the coolant.
  • the integration of the cooling line with the burner lance means that the length of the burner lance that extends into the rotary kiln is immersed in an atmosphere dominated by water vapor. In front of the burner lance, however, there is a reductive environment due to the control of the burner flame. Controlling redox conditions over the burner lance area exposes the burner lance itself to less chemical aggressiveness. Finally, the water vapor barrier at the end of the rotary kiln forms a separation between the oxidizing atmospheric air and the reductive environment within the rotary kiln set up in this way.
  • the burner lance there is more than one outlet of the line for conducting cooling water, the outlets being distributed between the burner outlet and the end of the rotary kiln head.
  • the ducts for carrying cooling water inside the refractory jacket.
  • a water line is attached to the burner lance without a refractory sheath.
  • the refractory casing which usually consists of a castable refractory material (refractory)
  • refractory castable refractory material
  • This very simple and inexpensive production method is already suitable for use with the burner lance.
  • the at least one line for conducting cooling water is either part of the flow-guiding parts of the burner lance itself or is connected to it in a thermally conductive manner.
  • the essential function of the refractory material is very poor heat conduction.
  • the cooling effect of the cooling water would therefore have little cooling effect on the burner lance in the case of casting in castable refractory material (refractory).
  • the burner lance itself would be cooled by a thermally conductive connection of the burner lance to the at least one line for conducting cooling water, which is of particularly great advantage if the burner lance has adjustable air and/or fuel nozzles. Cooling the burner lance extends the service life of the adjustment linkage.
  • the burner lance is movably mounted outside a rotary kiln head housing, whereby the depth at which the burner lance extends into the rotary kiln can be varied. This adjustability allows the plant to produce clinker for gray Portland cement or clinker for white cement in different configurations. If the burner lance is inserted deep into the rotary kiln, the burner lance can cool the cement clinker in the part of the rotary kiln behind the burner mouth and at the same time create a barrier for the reductive atmosphere.
  • the cooling of the burner lance can be switched off.
  • the cement clinker is not already quenched in the rotary kiln, but thrown into a cooler following the rotary kiln on the material flow side, where the cement clinker is cooled with atmospheric air.
  • This cooling air can then be routed as secondary air into the rotary kiln to recuperate the waste heat from the cooler or as tertiary air past the rotary kiln into a material flow upstream upstream of the rotary kiln Preheating and calcination are conducted.
  • the retraction of the burner lance thus extends the available rotary kiln length, so that the cement clinker for the production of gray cement can be sintered at a lower temperature but with a slightly longer residence time in the rotary kiln.
  • the rotary kiln opens into a clinker cooler, with a flap being present below a discharge opening of the rotary kiln, which releases or covers a clinker breaker, the flap in the open state revealing the cement clinker discharged from the rotary kiln directs the clinker crusher and, when closed, directs the cement clinker discharged from the rotary kiln into the clinker cooler.
  • the cement clinker In an open door configuration, the cement clinker is not fed through the clinker cooler.
  • the cement clinker for the production of white cement clinker has already cooled down so much when it is discharged from the rotary kiln, the temperature is around 250°C, that no further cooling is necessary before crushing.
  • Cement clinker with a temperature of 250°C can be pre-crushed with a crusher without any problems.
  • the final cooling can be done with atmospheric air, with the internal transport via conveyor belts cooling the cement clinker to acceptable temperatures for storage in a clinker silo. Transport through a clinker cooler is therefore not absolutely necessary in the production of cement clinker for the further production of white cement.
  • the still hot cement clinker for the production of gray cement is directed via the closed damper into the clinker cooler, where the clinker is cooled with atmospheric air.
  • the cooler exhaust air can be used for recuperation.
  • a hot gas generator heats cooling air from the cooler end or from the free atmosphere and directs it into the cooler inlet housing, where the heated cooling air flows into the rotary kiln as secondary air and reaches other parts of the system as tertiary air.
  • the flap is open, the cement clinker falls directly onto the crusher.
  • any exhaust air on the rotary kiln can flow through the cooler housing, with atmospheric air being drawn into the hot gas generator through the cooler.
  • the amount of water introduced into the rotary kiln is very critical. If too little water is introduced, the barrier between atmospheric air and the reductive environment in the rotary kiln collapses. The cement clinker is not cooled enough, so the cement clinker used to make white cement is of poor quality. On the other hand, if too much water is sprayed on the cement clinker, the cement clinker may undergo a hydraulic reaction on the surface to start setting, which degrades the quality of the clinker. In addition, excessive cooling unnecessarily reduces the temperature in the rotary kiln, which drives up energy costs and reduces the clinker yield.
  • a control device controls the amount of cooling water that flows through the line provided for cooling the cement clinker per unit of time.
  • the controlled system consists of measuring the clinker temperature that is dropped from the rotary kiln via the amount of water that flows into the rotary kiln per unit of time. Temperatures in the range between 200°C and 300°C with a target temperature of around 250°C are suitable as control temperatures.
  • the amount of water required to cool the clinker can be calculated from the specific enthalpy of vaporization of water.
  • a quantity of 1 kg of cement clinker with a heat capacity of about 1 kJ / kg / K requires about 1 kg * 1,000 K * 1 kJ / kg / K to cool down from about 1,400°C to about 250°C approx. 1 MJ heat up (rough calculation).
  • Water has a specific vaporization enthalpy of 2,400 kJ/kg (rough value), i.e. 2.4 MJ/kg.
  • 400 ml of water are required, which have to be evaporated. If thermolysis of the cooling water occurs, the water requirement for cooling the cement clinker is reduced considerably because the thermolysis of the water is strongly endothermic. Thermolysis is therefore even desirable because the thermolysis of the cooling water extracts heat from the cement clinker and recuperates heat in the area of the flame of the burner lance through a reverse reaction.
  • air can be taken from a clinker cooler following the rotary kiln, in particular from the rear part, in which the cooler exhaust air is around 100°C to 150°C.
  • This cooler exhaust air which only carries small amounts of heat, is heated to approx. 300°C to 350°C with a hot gas generator and fed to the housing of the burner lance as additional primary air.
  • This arrangement allows the vapors that are produced during the water cooling to be extracted from the rotary kiln without the rotary kiln missing the necessary supply air volume that is needed as carrier air for the operation of the heat exchanger and the calciner following the rotary kiln.
  • the vapors produced by cooling the clinker with water can be drawn off at the kiln head and thus do not burden the kiln process, but enough combustion air can still be supplied via the main burner.
  • the preheated air means that the main burner can be used with less or even no auxiliary fuels such as natural gas or oil.
  • additional fuel is also burned in the hot gas generator, the optimization of the combustion chambers and the spatial separation mean that the overall efficiency is improved.
  • an ash-rich but ignitable fuel such as lignite dust could also be burned in the hot gas generator. The ash would then be separated using a cyclone before the hot gases are fed into the process.
  • the burner cooling tube is thermally less stressed, so that it is possible to work with relatively hot air.
  • the cooling pipe can be efficiently cooled using a small amount of ambient air that is sucked into the line through suitably dimensioned openings.
  • FIG 1 is an illustration of a rotary kiln head housing 10 with a rotary kiln 15 adjoining it on the left, part of a clinker cooler 20 and a burner lance 25 according to the invention in a first configuration for the production of cement clinker for the further production of white cement.
  • the movably mounted burner lance 25 has been pulled out of the rotary kiln 15 as far as possible.
  • the burner lance 25 is guided through the rotary kiln housing 10 and protrudes into the rotary kiln 15 .
  • the flame 30 emerging from the burner lance generates a temperature of approx. 1,450° C.
  • the heated cooler exhaust air 70 flows counter to the material flow direction indicated by arrow 75 in the direction of the rotary kiln head 40, where the hot cooler exhaust air 70 flows into the rotary kiln 15 as secondary air 80 or as tertiary air 85 into a calciner, not shown here, through the tertiary air line 90.
  • a supply air line 95 present in the rotary kiln head housing 10 has no function in the configuration shown here. The following flows into the burner lance 25 from the outside: fuel 100 and atmospheric primary air 105 for generating the hot flame 30. Other lines 110 for carrying cooling water are also without function in this configuration.
  • the plant for the production of cement works like a generic plant for the production of cement clinker, with only the parts of the plant relating to the invention being shown here from the overall plant.
  • FIG 2 the identical plant for the production of cement clinker is shown in a second configuration shown here.
  • the open flap 50 which is positioned in such a way that cement clinker 45 falling out of the rotary kiln 15 directly onto a crusher 55, which crushes the cement clinker 45, which has already been quenched and cooled to about 250° C. here.
  • a conveyor belt which is not essential to the invention and transports the broken cement clinker 45 away is arranged.
  • the burner lance 25 is guided as far as possible into the rotary kiln 15 via its movable bearing.
  • the lines 110 for conducting cooling water are compared to the system configuration in figure 1 charged with water.
  • This water fulfills several functions.
  • a first function is cooling the burner lance, which is far in the rotary kiln 15 here, and is therefore exposed to a high thermal load.
  • a second function is the spraying of the cooling water onto the calcined raw meal 35 , which is still around 1,400° C. to 1,450° C. hot and which is in the sintering process to form cement clinker 45 .
  • For the production of cement clinker for the further production of white cement it is important to use raw materials that are particularly low in iron (Fe), manganese (Mn), chromium (Cr) and titanium (Ti). Due to the poverty mentioned above, the melting point of the raw meal is significantly higher, namely by about 100 K.
  • the raw meal crystallizes into the C, A and S phases known in the field of cement science. This crystallization requires very rapid cooling so that no other phases are formed at higher temperatures in the very complex phase diagram of the heated raw meal 35, which would otherwise, with slower cooling, not lead to the desired C, A and S phases through thermodynamic control .
  • the rapid cooling of the raw meal 35 prevents crystallization of the phases that form thermodynamically at other temperatures in the desired cement clinker 45, which on the one hand do not show the hydraulic properties of the cement clinker 45 and could also discolor the cement clinker 45.
  • the cooling water comes into contact with the very hot raw meal 35 / cement clinker 45, the water evaporates immediately.
  • thermolysis Due to the presence of the catalytically highly effective raw meal 35 and/or cement clinker 45 granules, it can also happen that the cooling water undergoes thermolysis with the splitting of the water into molecular hydrogen and oxygen, which, in addition to the pure water evaporation, results in a very high heat capacity, the raw meal 35 / the cement clinker 45 withdraws further significant heat. It is known that water only undergoes noticeable thermolysis at temperatures above 2,000°C. In the presence of catalytically active materials, however, the thermolysis can also take place at 900° C. due to the lowering of the activation energy for thermolysis. The thermolysis produces oxyhydrogen, i.e. a hydrogen (H 2 ) - oxygen (O 2 ) mixture.
  • H 2 hydrogen
  • O 2 oxygen
  • This oxyhydrogen is caused by the preheated hot air 120, which enters the rotary kiln head housing 10 through a line 125 is conducted, greatly diluted and blown into the area of the flame 30 of the burner lance 25.
  • the oxyhydrogen can also react again to form water, as in an oxyhydrogen flame, or it can go through a complex sequence of redox reactions with the fuel as a combustion reaction. Since the gas in the rotary kiln 25 is very hot due to the flame 30 of the burner lance 25, the heat absorbed by the evaporation of the cooling water is not returned to the process by recuperation.
  • the water vapor located in the area of the rotary kiln 15 between the rotary kiln head 40 and the flame 30 displaces the atmospheric and cold air coming from the outside of the cooler.
  • the water vapor here forms a barrier between the reductive flame exhaust gases set by the combustion control in the flame 30, which are located deeper in the rotary kiln, and the atmospheric outside air in the clinker cooler 20.
  • the hot air 120 supplied through the line 125 is already preheated with a corresponding flame low in oxygen and flows through the thermals in the rotary kiln 15, especially at the upper edge of the rotary kiln 15 into the rotary kiln 15. Part of the heated hot air 120 flows as tertiary air 85 into the tertiary air line 90.
  • FIG 3 an embodiment of the plant for the production of cement clinker for the further production of white cement is shown, in which, in addition to the figure 2 features shown a line for cooler exhaust air 111 is provided, which comes from the rear part of a clinker cooler.
  • This air has a temperature of between approx. 100° C. and 150° C. and is brought to a temperature of approx.
  • the heated cooler exhaust air 113 can be supplied directly to the primary air or it can flow into the burner lance housing, where it mixes with the flame at the end of the housing.
  • the additional feeding of the heated cooler exhaust air 113 into the primary air of the burner has the technical advantage that the vapors can be removed from the rotary kiln without the amount of air removed reducing the necessary carrier air for a calciner following the rotary kiln.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
EP19716842.0A 2018-04-13 2019-04-01 Anlage und brennerlanze fuer die weitere herstellung von weisszement Active EP3775742B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018108802.7A DE102018108802B3 (de) 2018-04-13 2018-04-13 Anlage zur wahlweisen Herstellung von Zementklinker für grauen oder weißen Zement
PCT/EP2019/058168 WO2019197195A1 (de) 2018-04-13 2019-04-01 ANLAGE UND BRENNERLANZE FÜR DIE WEITERE HERSTELLUNG VON WEIßZEMENT

Publications (2)

Publication Number Publication Date
EP3775742A1 EP3775742A1 (de) 2021-02-17
EP3775742B1 true EP3775742B1 (de) 2023-07-12

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EP19716842.0A Active EP3775742B1 (de) 2018-04-13 2019-04-01 Anlage und brennerlanze fuer die weitere herstellung von weisszement

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EP (1) EP3775742B1 (da)
DE (1) DE102018108802B3 (da)
DK (1) DK3775742T3 (da)
WO (1) WO2019197195A1 (da)

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Publication number Priority date Publication date Assignee Title
DE102021210662A1 (de) 2021-09-24 2023-03-30 Benninghoven Zweigniederlassung Der Wirtgen Mineral Technologies Gmbh Vorrichtung und Verfahren zum Trocknen von Material sowie Asphaltmischanlage mit einer derartigen Vorrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074705A (en) * 1960-09-27 1963-01-22 Smidth & Co As F L Rotary kiln and method of burning material therein

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178769B (de) 1960-09-27 1964-09-24 Smidth & Co As F L Verfahren und Vorrichtung zum Brennen von weissem Zement in einem Drehrohrofen
US3506250A (en) 1968-09-23 1970-04-14 Smidth & Co As F L Rotary kiln and method for manufacture of white cement
GB1434339A (en) 1974-10-03 1976-05-05 Smidth & Co As F L Coolers for cooling granular or pulverous material
US4461465A (en) 1980-02-11 1984-07-24 Exxon Research And Engineering Co. Facsimile sheet feeding apparatus
DE3521587C1 (de) 1985-06-15 1989-02-02 O & K Orenstein & Koppel Ag, 1000 Berlin Verfahren und Anlage zur Herstellung von weißem Zement
DE19622591A1 (de) 1996-06-05 1997-12-11 Heidelberger Zement Ag Verfahren zur stofflichen und thermischen Nutzung von Wasser, Mineralien und brennbare Anteile enthaltenden Reststoffen für die Herstellung von Portlandzementklinker
US6228143B1 (en) * 2000-01-18 2001-05-08 The International Metals Reclamation Company, Inc. Rotary thermal oxidizer for battery recycling and process
US20050284347A1 (en) * 2004-06-29 2005-12-29 Cemex Inc. Method of reducing cement kiln NOx emissions by water injection
JP4587333B2 (ja) * 2005-10-05 2010-11-24 Ｊｆｅマテリアル株式会社 Ｖ、Ｍｏ及びＮｉの少なくとも一つを含有する含有物の焙焼方法及び焙焼用ロータリーキルン
EP2626628B1 (de) * 2012-02-09 2014-04-09 Linde Aktiengesellschaft Befeuerung eines Industrieofens und zugehöriger Brenner

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074705A (en) * 1960-09-27 1963-01-22 Smidth & Co As F L Rotary kiln and method of burning material therein

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DE102018108802B3 (de) 2019-09-12
WO2019197195A1 (de) 2019-10-17
EP3775742A1 (de) 2021-02-17
DK3775742T3 (da) 2023-10-16

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