EP3710767A1 - Four à haute température - Google Patents

Four à haute température

Info

Publication number
EP3710767A1
EP3710767A1 EP18804274.1A EP18804274A EP3710767A1 EP 3710767 A1 EP3710767 A1 EP 3710767A1 EP 18804274 A EP18804274 A EP 18804274A EP 3710767 A1 EP3710767 A1 EP 3710767A1
Authority
EP
European Patent Office
Prior art keywords
high temperature
burner
temperature furnace
heating
heating chamber
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
Application number
EP18804274.1A
Other languages
German (de)
English (en)
Other versions
EP3710767B1 (fr
Inventor
Annika Nilsson
John Niska
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of EP3710767A1 publication Critical patent/EP3710767A1/fr
Application granted granted Critical
Publication of EP3710767B1 publication Critical patent/EP3710767B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/14—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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • 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
    • F27D19/00—Arrangements of controlling 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/02—Supplying steam, vapour, gases, or liquids
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/48—Generating plasma using an arc

Definitions

  • the present invention relates to the field of furnaces, and particularly to furnaces with a high operating temperature used for example in the steel industry for reheating steels.
  • Furnaces with high operating temperatures are extensively used in many fields.
  • One such field is the reheating of steels, which requires a heating medium able to provide uniform high temperature heating of the steel, generally in the range of 1100-1300 °C.
  • electrical heating methods currently used in the steel industry.
  • One method involves electrical resistance heating elements.
  • a limitation of this method for the reheating of steels is that the temperature range mentioned above is near the operational limits for the electrical elements, resulting in limited operational lifetimes.
  • Other electric heating methods used are induction heating and direct resistance heating with electrical currents. Both these methods can, however, present problems with non-uniform heating of the steel.
  • Heating methods involving a combustion process are currently the favored method for uniform high temperature heating of steel.
  • Combustion processes generally involve fossil fuels generating high levels of air contaminants such as NOx and CO2, which later are released to the atmosphere through an exhaust pipe or chimney, leading to air contamination.
  • Another problem with this type of combustion process is the use of fossil fuels, which today is threatened with great future restrictions and is in the process of being completely phased out.
  • EP2927587 discloses such an oxyfuel combustion system, comprising a heat exchanger circuit and a heat transfer fluid which flows there through to cool the hot exhaust gases. Due to the heat exchanger circuit, heat exiting the furnace with the exhaust gas through the exhaust pipe can be recovered and used for preheating combustion components. Although this type of system provides a more efficient use of the fuels, it does not remedy the problem with emission of air contaminants.
  • An object of the present invention is to overcome, or at least lessen the above mentioned problems.
  • a particular object is to provide a high temperature furnace which eliminates or at least greatly reduces the emission of air contaminants.
  • a high temperature furnace comprising a heating chamber, at least one first burner for heating the heating chamber, and a condensation device arranged in fluid connection with the heating chamber via an exhaust outlet.
  • the first burner is arranged for providing a water vapor atmosphere in the heating chamber, and the condensation device is arranged for condensing an exhaust gas generated by the first burner.
  • the water vapor atmosphere provided in the chamber according to the present inventive concept can further contribute to a reduction of the oxide scale formation on the metal and thus the oxide scale losses, which generally occur during the combustion driven heating process, even at high temperatures.
  • the condensation device can recover both the sensible heat and the latent heat of condensation from the exhaust gas exiting the heating chamber.
  • Water vapor can account for around 18 % of the total energy in a fuel, and condensation of the water vapor for use in low temperature applications by means of exhaust gas condensation can therefore increase the fuel efficiency of the overall process by an equal percentage.
  • the condensation device can be directed to and used for local heating systems, whereby the energy used for heating the high temperature furnace is reused. This has a positive effect on the environment and on the world economy, as it can contribute to a reduction of an overall energy consumption related to heating.
  • the at least one first burner comprises a hydrogen-oxyfuel burner. Hydrogen can be produced from the decomposition of water using renewable electricity, and it can be used as a high quality fuel in industrial furnaces in the steel industry, providing a carbon-dioxide free combustion process. The resulting rest product from the combustion is water vapor, the use of which can eliminate the problem with emission of NOx elements formed at high temperatures.
  • a substantially small high temperature furnace can comprise only one first burner
  • a substantially large high temperature furnace can comprise up to 100 first burners, or more, for an effective heating of the heating chamber and the material therein.
  • the at least one first burner comprises a plasma electric arc jet burner.
  • Plasma electric arc jet burners are highly efficient for high temperature heating.
  • steam as the gas for forming the plasma jet, a water vapor atmosphere can be formed in the furnace chamber.
  • This water vapor atmosphere can, in turn, be condensed in the condensation device such that the need for a chimney, and thus emission of any air contaminant, is avoided.
  • the high temperature furnace further comprises at least one second burner comprising a plasma electric arc jet burner.
  • Providing a combination of a hydrogen-oxyfuel burner and a plasma electric arc jet burner could increase the effectiveness of the process, as the plasma electric arc jet burner could provide booster power when sufficient hydrogen is not available for the process.
  • hydrogen combustion for the hydrogen-oxyfuel burner can provide booster power when sufficient electricity is not available during the heating process.
  • more than one second burner is provided. The number of first and second burners is selected depending on the size and design of the high temperature furnace, of the
  • hydrogen-oxyfuel combustion together with plasma electric arc jet heating provides the possibility of maintaining a low oxygen partial pressure which minimizes the formation of oxide scales on metals, such as steel, which form scale at high temperatures.
  • hydrogen-oxyfuel combustion is used for the entire heating process.
  • hydrogen-oxyfuel combustion is used for the final stages, or combustion zones, of the heating process, corresponding to those requiring the highest temperatures.
  • plasma electric arc jet heating is used for the entire heating process.
  • plasma electric arc jet heating is used in the combustion zones of the heating process corresponding to those requiring the highest temperatures.
  • the condensation device is a condensing heat exchanger.
  • the condensing heat exchanger is selected to be one suitable for the temperature range of the furnace, for example a radiative heat exchanger or a convective heat exchanger.
  • condensing heat exchangers can process exhaust gas at high temperatures and condense these to water, such that no exhaust gas is exiting the process and thus, no emissions are released to the atmosphere.
  • a convective heat exchanger of a plate and frame design is used.
  • a convective heat exchanger of shell and tube design is used.
  • the hot exhaust gases entering the condensation device from the heating chamber can flow counter-current, cross-flow or parallel with the cooling medium. It is also possible that the exhaust gas flow presents a combination of the aforementioned flow behaviors, such as, multiple cross-flow paths in a counter current cross-flow design.
  • the cooling medium of the condensation device can be steam, air, water or other fluid cooler than the exhaust gases.
  • Water can be used for the final condensing stage and it can further be heated up to form steam in the hottest zones of the condensing heat exchanger.
  • the exhaust gases can be either in the tubes or in the shell when using a convective heat exchanger of shell and tube design. When using air as a cooling medium, the resulting heated air can subsequently be used for direct heating of buildings.
  • the condensation device is arranged at a relatively cold zone of the furnace.
  • a cold zone of the furnace may be, for example, near a charging door, at a bottom wall of the furnace chamber or at a distance from the burners.
  • the heat exchanger is preferably arranged such that radiative heat from the furnace does not radiate directly on the condensation device.
  • the furnace further comprises at least one airlock charging chamber and, optionally, an additional airlock discharging chamber.
  • the additional discharging chamber is optional since the charging chamber can be used for both charging and discharging the material. Providing such airlock chambers allows minimizing air infiltration to the heating chamber and to maintain a positive pressure therein.
  • the furnace further comprises an electronic control system for controlling the at least one first and second burners, and the pressure within the heating chamber.
  • the electronic control system is arranged to control parameters such as fuel and oxygen flow rates, allowing to control the process temperature, and thereby provide a proper furnace temperature.
  • the furnace further comprises a water hydrolysis system for producing hydrogen and oxygen to the first burner. Hydrolysis of water provides an environmental friendly process of producing hydrogen and oxygen gas. Such a decomposition of water can be made using renewable electricity. Other methods providing a continuous supply of fuel to the furnace are also conceivable within the concept of the present invention.
  • the water vapor atmosphere is selected preferably within the range of 90 to 100 %.
  • a slight level of excess oxygen is preferable in the combustion gases to allow a complete combustion of all exhaust gases generated by the combustion of the burner, which in turn leads to an elimination or at least a great reduction of any contaminating exhaust gas released to the air.
  • a high temperature furnace as disclosed herein is used for reheating steels.
  • the use of a high temperature furnace as disclosed herein is used for reheating steels.
  • the temperature furnace as herein disclosed for the reheating of steels provides an energy efficient and environmental friendly process, as nearly no emissions of air contaminants are released to the atmosphere. Instead, any air contaminant resulting from the burner of the furnace is condensed and removed from the process in the condensed water.
  • the hot condensed water exiting the condensation device can, for example, be provided to a local heating system for heating buildings in the nearby area of the high temperature furnace. It may also be collected in a tank where it can be stored for a later distribution and use for heating.
  • a method for high temperature heating without emission of air contaminants comprising the steps of providing a high temperature furnace as disclosed herein, heating the heating chamber of the high temperature furnace by means of the at least one first burner, and providing a water vapor atmosphere in the heating chamber.
  • the method further comprises receiving an exhaust gas in the form of water vapor from the heating chamber in the condensation device of the high temperature furnace, and condensing the exhaust gas to water in the condensation device, whereby the emission of exhaust gas to the air is avoided.
  • the hot condensed water exiting the condensation device can be directed to a heating system and used for heating therein.
  • the method thereby provides an energy effective solution for a high temperature heating furnace, which is particularly environmental friendly as no emission of air contaminants is generated.
  • Fig. 1 is a schematic view of an embodiment of a high temperature furnace according to an aspect of the invention.
  • Fig. 2 is a schematic view of a second embodiment of a high temperature furnace according to an aspect of the invention.
  • Fig. 1 shows an embodiment of a high temperature furnace 100 according to the present invention.
  • the high temperature furnace 100 comprises a heating chamber 1.
  • the heating chamber 1 is adapted to be able to receive a material 101 , such as for example steel, which is to be thermally treated, for example heated, at a high temperature.
  • the heating chamber 1 comprises a first end 2 and an opposite second end 3, arranged at a distance from the first end 2.
  • the heating chamber 1 further comprises opposing bottom and top walls 4,5, and opposing front and back walls, all extending between the first end 2 and the second 3 end, providing a closed heating chamber 1.
  • the dimensions of the heating chamber 1 may vary depending on the application for which the heating chamber 1 is used, and the material to be treated therein.
  • the heating chamber 1 is typically arranged to be gas tight and comprises at least one sealable door which can be used for both charging and discharging the material to be treated.
  • the sealable charging and discharging door enables a controlled atmosphere of the chamber.
  • the heating chamber 1 comprises a sealable charging and discharging door, not shown in Fig.1 , arranged at either the front wall or at the second end 3, respectively, of the heating chamber 1.
  • Providing an air lock for charging and discharging the chamber at either position relative to the heating chamber is also conceivable within the present inventive concept.
  • the heating chamber 1 can comprise one or more heating zones, or combustion zones, for the different stages of heating a material in the high temperature furnace 100.
  • a large high temperature furnace can comprise from 2 to 5 combustion zones.
  • the high temperature furnace 100 further comprises a first burner 10.
  • the first burner 10 is arranged for heating the heating chamber.
  • the first burner 10 is, in the exemplifying embodiment of Fig. 1 , arranged at the first end 2 of the heating chamber 1 , from where it provides heating to high temperatures of the closed heating chamber 1 and, thus, any material arranged therein. It is however possible to arrange the first burner 10 at other locations of the heating chamber 1 such to provide an effective heating of the material therein. It is furthermore possible to provide a high
  • the temperature furnace comprising a plurality of first burners, distributed at different locations of the heating chamber for an effective heating of the material.
  • the number of first burners of a large high temperature furnace can be from 5 to 100.
  • the first burner 10 is further arranged for providing a water vapor atmosphere in the heating chamber 1.
  • the first burner 10 comprises a hydrogen-oxyfuel burner 10. Flydrogen and oxygen is provided in separate gas pipelines 11 , 12, respectively, to the hydrogen-oxyfuel burner 10.
  • the input oxygen and hydrogen for the hydrogen-oxyfuel burner 10 is set in amounts such to generate a water vapor or steam furnace atmosphere as the rest product of the combustion. This enables a condensation of the rest product, i.e. the water vapor or steam, instead of emission of the air contaminant normally associated with fossil fuel combustion.
  • the hydrogen and oxygen provided to the hydrogen-oxyfuel burner 10 can be generated by a hydrolysis system, which optionally can be integrated with the high temperature furnace 100.
  • understoichiometric combustion is possible facilitates keeping out unwanted oxygen from entering the high temperature furnace 100, allowing the furnace to operate more efficiently.
  • Operating at near stoichiometric combustion can further increase the flame temperature, reduce the oxide scale losses and increase the process yield.
  • oxide scale losses can be as large as about 0.2%-1 % of the steel input, depending on the steel alloy, steel dimensions, furnace temperature, holding time, type of fuel, excess oxygen, etc.
  • the cost associated with oxide scale losses are sometimes of about the same magnitude as the cost for the fuel needed to fire the furnace. A reduction in the scale losses could thus help to compensate for a higher cost involved when using hydrogen as a fuel.
  • the first burner comprises a plasma electric arc jet burner.
  • a plasma electric arc jet burner as the first burner is possible when steam or water vapor is used as the gas forming the plasma jet.
  • the skilled person understands that it is possible, within the concept of the present invention, to provide a plurality of plasma electric arc jet burners for the different combustion zones of the heating chamber 1.
  • the first burner 10 and the pressure within the heating chamber 1 is controlled by means of an electronic control system, not shown in Fig. 1. Referring to Fig 2, there is provided a high temperature furnace 100
  • the first burner 10 is therein arranged at the first end
  • the first burner 10 comprises a hydrogen-oxyfuel burner
  • the second burner 20 comprises a plasma electric arc jet burner.
  • the plasma electric arc jet burner 20 is provided with a pipe line 21 , through which the gas forming the plasma jet enters the burner.
  • the gas forming the plasma jet is, in this embodiment, steam or water vapor.
  • a condensation device 30 is further arranged in fluid connection with the heating chamber 1 via an exhaust outlet 31.
  • the exhaust outlet 31 is arranged near the first end 2 of the heating chamber 1 , having a top end arranged adjacent to the bottom wall 4, and a bottom end arranged adjacent to the condensation device 30.
  • the exhaust outlet 31 further comprises side walls extending from its top end to its bottom end, providing a medium through which a gas can flow.
  • the exhaust outlet 31 can be arranged at any other, for the purpose suitable position of the heating chamber 1 , such as for example inside the bottom wall 4 of the heating chamber 1.
  • the exhaust outlet 31 is arranged at a relatively cold zone of the heating chamber 1.
  • the condensation device 30 is arranged for condensing an exhaust gas generated by the first burner 10. It is thus arranged for receiving an exhaust gas from the heating chamber 1.
  • the condensation device 30 is selected such that it is suitable for the temperature range of the furnace, and can, for example, be either one of a radiative heat exchanger or a convective heat exchanger.
  • the condensation device 30 is arranged near the first end 2 of the heating chamber 1 at an offset location thereof. From this offset location, radiative heat from the heating chamber 1 does not reach the condensation device 30 directly.
  • the condensation device 30 is preferably arranged near an end of the heating chamber at which charging of the high temperature furnace 100 occurs, or at a relatively cold location of the high temperature furnace 100, chosen preferably based on the gas flow circulation from the first burner 10 through the heating chamber 1. It is also possible, within the concept of the present invention, to provide the condensation device 30 in a wall of the heating chamber 1 , or at any other location of the high temperature furnace, preferably where it is protected from the radiative heat of the heating chamber 1.
  • the exhaust gas will exit the process as primarily water vapor or steam which is condensed by means of the condensation device 30.
  • the hot condensed water can be used, for example, for a water hydrolysis system or for local district heating.
  • An example of a local district heating use is the heating of radiators in the proximity of the furnace, which might be required during the cold season of the year.
  • the material 101 is placed in the heating chamber 1 of the high temperature furnace 100.
  • the heating chamber 1 and thus the material 101 , is heated by means of the at least one first burner 10 to the desired temperature.
  • additional heating is provided by means of at least one second burner 20.
  • the first burner generates an exhaust gas which is in the form of water vapor, whereby a water vapor atmosphere is provided in the heating chamber 1.
  • the exhaust gas is removed from the heating chamber 1 and received in the condensation device 30 via the exhaust outlet 31 of the high temperature furnace 100.
  • the condensation device 30 the exhaust gas is condensed into water which subsequently is removed from the condensation device 30, whereby the need for a chimney for the emission of exhaust gas to the air is avoided.
  • condensation devices 30 herein described are to be taken as examples only, and a condensation device 30 different from those herein described may also be used, provided that a complete condensation of water vapor exhaust gas is conceivable.
  • the condensation device can for example comprise the outer shell of the high temperature furnace given that it may, when providing a sufficient cooling, condense the water vapor generated in the heating chamber,
  • the hot condensed water can be used in any way suitable for the process. It can for example be used within the high temperature furnace provided with a hydrolysis system, as a source of heating. It can also be removed from the high temperature furnace and used for heating an external process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)

Abstract

L'invention concerne un four à haute température (100) comprenant une chambre de chauffage (1), au moins un premier brûleur (10) pour chauffer ladite chambre de chauffage, et un dispositif de condensation (30) disposé en communication fluidique avec ladite chambre de chauffage par l'intermédiaire d'une sortie d'échappement (31). Le ou les premiers brûleurs (10) sont agencés pour fournir une atmosphère de vapeur d'eau dans la chambre de chauffage (1), et le dispositif de condensation (30) est agencé pour condenser un gaz d'échappement généré par le ou les premiers brûleurs (10), de telle sorte qu'il n'y a pas besoin d'une cheminée et aucune émission de contaminants d'air.
EP18804274.1A 2017-11-16 2018-11-15 Four à haute température, utilisation d'un four à haute température et procédé de chauffage à haute température sans émissions dans un four à haute température Active EP3710767B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1751417A SE1751417A1 (en) 2017-11-16 2017-11-16 High temperature furnace
PCT/EP2018/081329 WO2019096885A1 (fr) 2017-11-16 2018-11-15 Four à haute température

Publications (2)

Publication Number Publication Date
EP3710767A1 true EP3710767A1 (fr) 2020-09-23
EP3710767B1 EP3710767B1 (fr) 2023-05-31

Family

ID=64332294

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18804274.1A Active EP3710767B1 (fr) 2017-11-16 2018-11-15 Four à haute température, utilisation d'un four à haute température et procédé de chauffage à haute température sans émissions dans un four à haute température

Country Status (7)

Country Link
EP (1) EP3710767B1 (fr)
ES (1) ES2951213T3 (fr)
FI (1) FI3710767T3 (fr)
HU (1) HUE062127T2 (fr)
PL (1) PL3710767T3 (fr)
SE (1) SE1751417A1 (fr)
WO (1) WO2019096885A1 (fr)

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN113758292B (zh) * 2021-09-30 2023-12-05 南京华电节能环保股份有限公司 一种焦炉荒煤气余热综合利用装置

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BR112015017639A2 (pt) * 2013-01-28 2017-07-11 Jfe Steel Corp método para ajustar a atmosfera interior de forno em um forno de têmpera contínuo
KR101438466B1 (ko) * 2013-07-15 2014-09-05 주식회사 포스코 가열로 연소 공기 재활용 장치
KR101620968B1 (ko) * 2013-12-20 2016-05-13 한국생산기술연구원 액체 금속을 이용한 순산소 직접 연소 시스템
DE102014004778A1 (de) 2014-04-01 2015-10-01 Linde Aktiengesellschaft Sauerstoff/Luft-Brennstoff-Brennanlage und Verfahren zum Vorwärmen von Verbrennungskomponenten
KR101714347B1 (ko) * 2016-09-22 2017-03-09 윤서구 폐열을 이용한 고효율 용해로

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PL3710767T3 (pl) 2023-08-21
SE541228C2 (en) 2019-05-07
EP3710767B1 (fr) 2023-05-31
FI3710767T3 (fi) 2023-07-17
HUE062127T2 (hu) 2023-09-28
SE1751417A1 (en) 2019-05-07
ES2951213T3 (es) 2023-10-18

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