EP3114243B1 - Industrieofen zur erhitzung von produkten wie etwa stahlprodukte - Google Patents

Industrieofen zur erhitzung von produkten wie etwa stahlprodukte Download PDF

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Publication number
EP3114243B1
EP3114243B1 EP15705323.2A EP15705323A EP3114243B1 EP 3114243 B1 EP3114243 B1 EP 3114243B1 EP 15705323 A EP15705323 A EP 15705323A EP 3114243 B1 EP3114243 B1 EP 3114243B1
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EP
European Patent Office
Prior art keywords
combustion
duct
flow rate
predetermined flow
fumes
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.)
Not-in-force
Application number
EP15705323.2A
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English (en)
French (fr)
Other versions
EP3114243A1 (de
Inventor
Ludovic Ferrand
Patrick Dubois
Eduardo PINTO DE SOUSA
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.)
John Cockerill SA
Original Assignee
Cockerill Maintenance and Ingenierie SA
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
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Publication of EP3114243A1 publication Critical patent/EP3114243A1/de
Application granted granted Critical
Publication of EP3114243B1 publication Critical patent/EP3114243B1/de
Not-in-force legal-status Critical Current
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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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/3044—Furnace regenerators
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • 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
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • 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
    • F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating 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
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F27D2017/007—Systems for reclaiming waste heat including regenerators

Definitions

  • the invention relates to an industrial furnace for heating products such as steel products.
  • furnaces for heating steel products such as preheating furnaces for processing steel coils, comprise a thermally insulated enclosure and a plurality of burners arranged in the enclosure to heat the steel products circulating in the furnace. pregnant.
  • the burners are supplied with combustion air and with a natural gas type fuel, produce, by a first combustion, flames that heat the iron and steel products, and generate fumes circulating counter-cyclically. current of said steel products.
  • These fumes are usually themselves treated by a second combustion called "post-combustion", whose role is to ensure complete combustion to remove fumes at least a portion of polluting gases such as carbon monoxide. The resulting smoke and less polluting are then removed from the oven and released into the atmosphere by a chimney.
  • the energy consumption of preheating furnaces for processing steel coils is particularly high, of the order of 220 kWh of natural gas per tonne of heated steel. It is therefore particularly important, both from an environmental and an economic point of view, to try to improve the energy efficiency of these ovens.
  • a first method usually used is to equip the furnaces with means of recovery of energy to recover heat lost in the fumes, as disclosed in DE202013102653U1 .
  • These recovery means are typically constituted by a tubular bundle heat exchanger comprising metal tubes in which circulates the combustion air used by the burners.
  • the fumes circulating around the tubes, preheat the combustion air, which improves the efficiency of the first combustion mentioned earlier.
  • This heat recovery is, however, limited by the maximum permissible temperature that can withstand the tubes, which makes it necessary to dilute the fumes with cold air.
  • a second method, which has now largely supplanted the first method, is to use regenerative burners.
  • This solution has a number of disadvantages.
  • the regenerative burners are not suitable for sucking fumes that are unburned in the burner, because it then becomes impossible to carry out an afterburner.
  • This solution is moreover difficult to apply to compact furnaces because of the one hand, of the space of regenerative tanks which are equipped with the burners and, on the other hand, the need to install the double of regenerative burners compared to to the number of burners of a standard solution.
  • Regenerative burners operate in pairs, according to a cyclic operation: the burners are half of the time in one mode of combustion and the other half of the time in a mode of accumulation of heat.
  • the invention aims to improve the energy efficiency of an industrial furnace while having an acceptable size.
  • a industrial furnace for heating products such as steel products, the furnace comprising a thermally insulated enclosure and a plurality of burners arranged in the enclosure for heating the products flowing from one end to the other of the enclosure, the burners being distributed in a plurality of temperature controlled heating zones.
  • the oven further comprises recovery means for recovering thermal energy recovery fumes from a first combustion performed by the burners so as to improve energy efficiency of the furnace.
  • the recovery means comprise a rotating regenerator associated with each heating zone, each of the rotating regenerators being adapted to receive a predetermined flow rate of the recovery fumes via a first pipe, to receive a predetermined flow rate of an air of supply via a second pipe, to preheat this supply air to provide the burners of the associated heating zone a predetermined flow of preheated combustion air via a third pipe, and to exhaust exhaust gases via a fourth pipe the predetermined flow rate of the recovery fumes received by each rotating regenerator being regulated by first regulating means comprising a first valve mounted on the fourth line of said rotating regenerator.
  • the energy efficiency of the furnace is improved through a recovery of thermal energy achieved by means of rotating regenerators which have congestion acceptable for most industrial furnaces.
  • the invention relates to an industrial furnace for heating products such as steel products, and is here implemented in a non-oxidizing preheating furnace of steel strips for continuous lines for processing steel coils.
  • the furnace of the invention 1 comprises a thermally insulated enclosure 2, a plurality of burners 3 arranged in the enclosure 2 to achieve a first combustion and heat a steel strip 4 flowing from one end to the other of the enclosure 2, so-called "post-combustion" means 5 adapted to achieve a second combustion, and recovery means 6.
  • the plurality of burners 3 is constituted by ten burners 3 distributed according to a plurality of temperature-controlled heating zones, in this case according to three heating zones Z1, Z2, Z3.
  • This distribution makes it possible to regulate the temperature of the furnace 1 by virtue of only three thermocouples 7 positioned in the heating zones Z1, Z2, Z3, so as to conform the temperature of the furnace to predetermined heating curves which depend in particular on a heating temperature.
  • the heating zones Z1, Z2, Z3 are thus regulated according to temperature setpoints typically between 1200 and 1350 degrees Celsius for a desired band temperature at the level of the desired band at a strip output S1 of the furnace 1.
  • S1 band output of oven 1 between 550 and 750 degrees Celsius.
  • the first combustion performed by the burners 3 requires a fuel, here natural gas, and an oxidant, here combustion air Ac.
  • the burners 3 operate here in so-called "sub-stoichiometric" mode, also called combustion in air defect or combustion in rich gas.
  • a combustion air flow is always less than an air flow necessary to completely burn a flow of natural gas Gn introduced into the same burner.
  • Fumes of first combustion F1 are then generated by the burners 3, said fumes of first combustion F1 having a so-called "incomplete" combustion, an oxygen content of which is practically zero, the oxygen of the combustion air having combined entirely or almost with natural gas.
  • the sub-stoichiometric regime is particularly advantageous since it makes it possible to give the fumes of first combustion F1 a reducing power on the steel strip 4, which makes it possible to avoid the formation of oxides on the steel strip, type of iron oxide for example, and even to reduce some oxides possibly present on the steel strip before this first combustion. This improves the quality of the steel strip preheated by the furnace of the invention.
  • the fumes of first combustion F1 are loaded with intermediate compounds after the first incomplete combustion, for example dihydrogen or carbon monoxide. Carbon monoxide can not be released into the atmosphere because it is a pollutant whose emissions are regulated.
  • the post-combustion means 5 are thus used to carry out the second combustion, which consists in injecting air called "post-combustion air" Apc, whose role is to complete the first combustion, carried out by the burners 3, in order to suppress the first combustion fumes F1 the intermediate compounds. Since the fumes of first combustion F1 circulate generally against the current of the steel strip 4, the post-combustion means 5 are located in the furnace 1 upstream of the burners 3, that is to say they are located between an inlet E of the furnace and the burners 3. The post-combustion air Apc is injected by the post-combustion means 5 according to a post-combustion air flow Apc dosed to ensure complete combustion without adding unnecessary air.
  • post-combustion air Apc
  • the post-combustion air Apc is injected into an area of the enclosure in which the steel strip has a temperature that is too low to undergo the effects of oxidation caused by oxygen in the air. post-combustion Apc in excess.
  • the post-combustion air Apc can be injected from flue gas flues.
  • Recovery fumes F2 at least partially depolluted, are generated by the second combustion.
  • the recovery means 6 are intended to recover thermal energy from these recovery fumes F2, which are therefore derived from the first combustion and the second combustion. This improves the energy efficiency of the furnace 1.
  • the recovery means 6 comprise a rotating regenerator 7 associated with each heating zone Z1, Z2, Z3, and thus here three rotating regenerators 7.
  • the role of these rotating regenerators 7 is to heat a predetermined flow of supply air 8 so as to provide a predetermined flow rate of preheated combustion air 9.
  • the fact of using a preheated combustion air Ac makes it possible to significantly increase the efficiency of the first combustion by decreasing the amount of natural gas Gn required for that and, therefore, to increase the energy efficiency of the furnace of the invention 1.
  • Each rotary regenerator 7 is adapted to receive a predetermined flow of recovery fumes 10 via a first pipe 11, to receive the predetermined flow of supply air 8 via a second pipe 12, to preheat this supply air Aa for supplying to the burners 3 of the heating zone associated with the rotating regenerator 7 the predetermined flow rate of preheated combustion air 9 via a third pipe 14, and discharging exhaust fumes F3 via a fourth pipe 15.
  • Each rotating regenerator 7 is fed continuously by the predetermined flow of feed air 8 and by the predetermined flow rate of recovery fumes 10.
  • Each rotating regenerator 7 comprises, in a manner known per se, rotating compartments which are placed in communication a first half of the time with the first pipe 11, which allows a warming of the interior of the regenerator 7, then a second half of the time with the second pipe 12, which allows to supply air supply Aa the rotating regenerator 7.
  • the supply air Aa which is never in contact with the recovery fumes, is thus preheated, which allows to provide the associated burner 7 the predetermined flow of preheated combustion air 9 .
  • the recovery fumes F2 are distributed in each rotating regenerator 7 so as to always maintain a certain distribution ratio between the predetermined flow rate of supply air 8 and the predetermined flow rate of recovery fumes 10.
  • a distribution ratio is set between the predetermined flow rate of supply air 8 and the predetermined flow rate of recovery fumes 10 of between approximately 1 and 1.2, such a distribution ratio making it possible to optimize the energy efficiency of the furnace of the invention.
  • the predetermined flow rate of recovery fumes received by each rotating regenerator 7 is first regulated by first regulating means comprising a first valve 17 mounted on the fourth line 15 of said rotating regenerator 7.
  • first regulating means comprising a first valve 17 mounted on the fourth line 15 of said rotating regenerator 7.
  • the predetermined flow rate of recovery fumes 10 is regulated indirectly, through a regulation of the flow of exhaust fumes F3.
  • This regulation is effected by means in particular of the first valve 17 which is mounted downstream of said rotary regenerator 7, that is to say which is located between the rotating regenerator 7 and a furnace exhaust outlet S2 which is here implemented. communication with a chimney 25 through which the exhaust fumes are removed from the furnace 1.
  • the predetermined flow rate of supply air 8 received by each rotating regenerator 7 is further regulated by second regulating means comprising a second valve 20 mounted on the second pipe 12 of the said rotary regenerator 7.
  • second regulating means comprising a second valve 20 mounted on the second pipe 12 of the said rotary regenerator 7.
  • a flowmeter 21 is mounted on the third conduit 14 each rotating regenerator 7, each flowmeter 21 being adapted to measure the combustion air flow rate 9 supplied to the burners 3 of the heating zone Z1, Z2, Z3 associated with said rotating regenerator 7.
  • a flow measurement generating little loss of pressure in the pipe, which helps maintain combustion air at a relatively low pressure.
  • a flowmeter 21 of the Venturi tube or Pitot tube or Vortex effect type will be chosen.
  • the preheated combustion air is brought to temperatures typically between 800 degrees Celsius and 1000 degrees Celsius, while the exhaust fumes are brought to temperatures typically between 150 degrees Celsius and 250 degrees Celsius.
  • first and second regulating means comprising respectively the first 17 and second valves 20, are situated on the fourth and second conduits 8, which have relatively low temperatures relative to the first 11 and third lines 14. Control means are therefore a less expensive and more reliable solution than a similar solution located on the hotter pipes.
  • the third pipe 14 of each regenerator rotating two shutoff valves 22 is mounted on the third pipe 14, and inert gas injection means 23 is mounted on the third pipe 14. nitrogen, to fill a gas gap between the two valves of 23. This maintains a positive pressure between the two shutoff valves 23, so that in case of leakage at one of the shutoff valves, only an inert gas leakage flow can enter the enclosure 2.
  • the post-combustion air (Apc) comes in part from the preheated combustion air generated by at least one rotating regenerator, possibly oversized for this purpose. This allows to further improve the energy efficiency of the oven of the invention.

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

Claims (9)

  1. Industrieofen zum Erhitzen von Produkten (4), wie Stahlprodukten, wobei der Ofen einen wärmeisolierten Raum (2) und eine Vielzahl von Brennern (3) umfasst, die in dem Raum (2) angeordnet sind, um die Produkte, die von einem Ende des Raums zum anderen zirkulieren, zu erhitzen, wobei die Brenner (3) über eine Vielzahl von temperaturgeregelten Heizzonen (Z1, Z2, Z3) verteilt sind, wobei der Ofen ferner Rückgewinnungsmittel (6) umfasst, die dazu bestimmt sind, eine Wärmeenergie aus Rückgewinnungsrauchgasen (F2) rückzugewinnen, die aus einer ersten Verbrennung stammen, die von den Brennern durchgeführt wird, um eine Energieeffizienz des Ofens zu verbessern,
    dadurch gekennzeichnet, dass die Rückgewinnungsmittel (6) einen Drehregenerator (7) umfassen, der jeder Heizzone (Z1, Z2, Z3) zugeordnet ist, wobei jeder der Drehregeneratoren (7) daran angepasst ist, eine vorgegebene Menge an Rückgewinnungsrauchgasen (10) über eine erste Leitung (11) aufzunehmen, eine vorgegebene Menge an Versorgungsluft (8) über eine zweite Leitung (12) aufzunehmen, diese Versorgungsluft vorzuwärmen, um die Brenner (3) der dazugehörigen Heizzone mit einer vorgegebenen Menge an vorerwärmter Verbrennungsluft (9) über eine dritte Leitung (14) zu versorgen, und Abgase (F3) über eine vierte Leitung (15) abführen, wobei die vorgegebene Menge an Rückgewinnungsrauchgasen (10), die von jedem Drehregenerator (7) aufgenommen wird, von ersten Regelungsmitteln geregelt wird, die ein erstes Ventil (17) umfassen, das an der vierten Leitung (15) des genannten Drehregenerators (7) angebracht ist.
  2. Industrieofen nach Anspruch 1, bei dem die vorgegebene Menge an Versorgungsluft (8), die von jedem Drehregenerator (7) aufgenommen wird, von zweiten Regelungsmitteln geregelt wird, die ein zweites Ventil (20) umfassen, das an der zweiten Leitung (12) des genannten Drehregenerators (7) angebracht ist.
  3. Industrieofen nach Anspruch 1, bei dem für jeden Drehregenerator ein Durchflussmesser (21) an der dritten Leitung (14) des genannten Drehregenerators (7) angebracht ist.
  4. Industrieofen nach Anspruch 3, bei dem mindestens einer der Durchflussmesser vom Typ mit Venturi-Rohr oder Pitot-Rohr oder mit Vortex-Effekt ist.
  5. Industrieofen nach Anspruch 1, bei dem für jeden Drehregenerator zwei Absperrschieber (22) auf der dritten Leitung (11) angebracht sind und Gaseinspritzmittel (23) auf der dritten Leitung (14) angebracht sind, um einen Raum zwischen den beiden Absperrschiebern (22) mit Inertgas zu füllen.
  6. Industrieofen nach Anspruch 5, bei dem das eingespritzte Gas Stickstoff ist.
  7. Industrieofen nach einem der vorhergehenden Ansprüche, bei dem die Rückgewinnungsrauchgase durch eine zweite Verbrennung erzeugt werden, die die erste Verbrennung, die von den Brennern (3) durchgeführt wird, vervollständigen kann.
  8. Industrieofen nach Anspruch 7, bei dem eine Nachverbrennungsluft (Apc), die für die zweite Verbrennung verwendet wird, zum Teil aus der vorerwärmten Verbrennungsluft (Ac) stammt, die von mindestens einem Drehregenerator (7) erzeugt wird.
  9. Industrieofen nach einem der vorhergehenden Ansprüche, bei dem ein Verhältnis zwischen der vorgegebenen Menge an Versorgungsluft (8) und der vorgegebenen Menge an Rückgewinnungsrauchgasen (10) zwischen 1 und 1,2 beträgt.
EP15705323.2A 2014-03-04 2015-02-20 Industrieofen zur erhitzung von produkten wie etwa stahlprodukte Not-in-force EP3114243B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1451767A FR3018344B1 (fr) 2014-03-04 2014-03-04 Four industriel pour chauffer des produits tels des produits siderurgiques
PCT/EP2015/053581 WO2015132082A1 (fr) 2014-03-04 2015-02-20 Four industriel pour chauffer des produits tels des produits siderurgiques

Publications (2)

Publication Number Publication Date
EP3114243A1 EP3114243A1 (de) 2017-01-11
EP3114243B1 true EP3114243B1 (de) 2018-10-24

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EP15705323.2A Not-in-force EP3114243B1 (de) 2014-03-04 2015-02-20 Industrieofen zur erhitzung von produkten wie etwa stahlprodukte

Country Status (7)

Country Link
US (1) US20170082364A1 (de)
EP (1) EP3114243B1 (de)
CN (1) CN106164302A (de)
BE (1) BE1023618B1 (de)
FR (1) FR3018344B1 (de)
RU (1) RU2016138842A (de)
WO (1) WO2015132082A1 (de)

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Publication number Priority date Publication date Assignee Title
DE102016112103B4 (de) * 2016-07-01 2019-08-22 Thomas Kirchhöfer Hochtemperaturofen mit Wärmerückgewinnung
TWI585345B (zh) * 2016-08-15 2017-06-01 台技工業設備股份有限公司 廢氣排出系統及廢氣排出方法
EP3839340A1 (de) * 2019-12-18 2021-06-23 Linde GmbH Verfahren und vorrichtung zum erwärmen eines ofens
CN117367122B (zh) * 2023-12-07 2024-02-09 山西卓越水泥有限公司 一种水泥制造脱硝用分解炉

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US3807943A (en) * 1970-08-10 1974-04-30 Anchor Hocking Corp Muffle furnace for treatment of articles on conveyor
US4022571A (en) * 1975-10-10 1977-05-10 Agm Industries, Inc. Industrial heating
DE3203433C2 (de) * 1982-02-02 1984-08-09 Friedrich Wilhelm Dipl.-Ing. 7761 Moos Elhaus Anwärmofen für langgestrecktes Gut
FI96359C (fi) * 1994-11-17 1998-08-26 Tampella Power Oy Menetelmä ja laitteisto kattilalaitoksen palamisilman säätämiseksi
US5826610A (en) * 1996-05-06 1998-10-27 Vita International, Inc. Breakaway coupling device
EP0856588B1 (de) * 1997-01-31 2002-10-23 Kawasaki Steel Corporation Ofen zum Durchlaufglühen von Metallband
US5921771A (en) * 1998-01-06 1999-07-13 Praxair Technology, Inc. Regenerative oxygen preheat process for oxy-fuel fired furnaces
JP3852363B2 (ja) * 2002-04-19 2006-11-29 日産自動車株式会社 エンジンの制御装置
CN102686965B (zh) * 2009-12-15 2016-02-17 西门子奥钢联冶金技术有限公司 用于对连续运动的钢带进行预热的装置和方法
EP2687801B1 (de) * 2011-03-18 2016-08-31 NGK Insulators, Ltd. Tunnelofen zum brennen eines porösen keramischen materials
FR2992058B3 (fr) * 2012-06-19 2014-12-26 Cockerill Maintenance & Ingenierie Sa Four de revenu et procede de pilotage

Non-Patent Citations (1)

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Publication number Publication date
WO2015132082A1 (fr) 2015-09-11
US20170082364A1 (en) 2017-03-23
RU2016138842A (ru) 2018-04-04
EP3114243A1 (de) 2017-01-11
BE1023618A1 (fr) 2017-05-17
CN106164302A (zh) 2016-11-23
BE1023618B1 (fr) 2017-05-17
FR3018344B1 (fr) 2016-04-29
RU2016138842A3 (de) 2018-10-22
FR3018344A1 (fr) 2015-09-11

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