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US20100213647A1 - Process and installation for heating a metallic strip, notably for an annealing - Google Patents

Process and installation for heating a metallic strip, notably for an annealing Download PDF

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Publication number
US20100213647A1
US20100213647A1 US12/601,446 US60144608A US2010213647A1 US 20100213647 A1 US20100213647 A1 US 20100213647A1 US 60144608 A US60144608 A US 60144608A US 2010213647 A1 US2010213647 A1 US 2010213647A1
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US
United States
Prior art keywords
gases
combustion
heating
preheating
air
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.)
Abandoned
Application number
US12/601,446
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English (en)
Inventor
Philippe Buchet
Nicolas Richard
Pierre-Jacques Lhomme
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.)
Engie SA
Original Assignee
GDF Suez 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
Application filed by GDF Suez SA filed Critical GDF Suez SA
Assigned to GDF SUEZ reassignment GDF SUEZ ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LHOMME, PIERRE-JACQUES, BUCHET, PHILIPPE, RICHARD, NICOLAS
Publication of US20100213647A1 publication Critical patent/US20100213647A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • C21D1/34—Methods of heating
    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F23L15/02—Arrangements of regenerators
    • 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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • 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 specially adapted for 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
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the invention relates to a process and an installation for heating a metallic strip to a set temperature needing the presence of a reducing combustion atmosphere (lack of fuel in comparison with stoechiometric quantity).
  • the invention is described as for its application to heating of a metallic strip in the form of a strap transmitted to an annealing installation, notably for making galvanized steel.
  • FIG. 1 is a schematic view of a first example of a known installation for preheating a strap to a set temperature appropriate to an annealing installation. It comprises an oven delimiting a chamber 102 for preheating the strap 100 and a chamber 104 for heating the strap in order that, at the installation exit, the strap is at a set temperature, for example of 750° C.
  • the preheating chamber 102 comprised between the oven entry 108 and a place 110 where post-combustion air from a duct 112 is injected, hot gases with no reducing power, so that the atmosphere in the oven, which could flow out through the entry 108 , is not toxic (i.e. it contains no CO), flow from the heating part 104 to the proximity of the entry 108 , in a direction opposite that of the strap 100 .
  • the heat exchanges between a surface and a current parallel to this surface are not very efficient, because of the presence of laminar layers. Consequently, the chamber 102 must have a great length.
  • burners 116 receive a fuel transmitted by a feed circuit 118 connected to each burner 116 , and combustion air by a circuit 120 also connected to each burner.
  • the air in the circuit 120 has been preferably preheated in a heat exchanger 122 in which also circulate the hot gases evacuated by a duct 124 from the proximity of the oven entry end 108 .
  • the burners 116 are open fire burners working in a reducing combustion atmosphere, i.e. in the presence of CO.
  • the strap temperature increases from a temperature around 350 to 400° C., near the air injection place 110 , to a set temperature for example of 750° C. at the exit 114 .
  • the whole system using open fire burners for forming the reducing combustion atmosphere with the air preheated by the exchanger 122 has a relatively low efficiency, in the order of 50%, so that the fuel consumption is high.
  • the heat losses are important, essentially due to the evacuation of the gases, still at a high temperature, into the atmosphere, because the heat exchanger 122 which collects the heat of the gases evacuated by the duct 124 has a moderate efficiency.
  • this installation comprises a preheating chamber 202 with a small length, because it comprises a device 210 for preheating the strap by projecting hot gases in a direction perpendicular to the strap.
  • This device comprises chambers whose wall, facing the strap, comprises a plurality of orifices projecting as many jets of hot gases.
  • Such a device 210 sometimes called “plenum”, enables to get an efficient heat exchange over a small length.
  • This preheating chamber 202 is connected to a preheating chamber 204 in which the strap follows a zigzag path between radiant tubes.
  • the preheating chamber and the heating chamber have the same protective atmosphere.
  • the combustion gases evacuated by the radiant tubes, which are separated from the protective atmosphere in the chamber 204 are extracted by ducts 205 to a heat exchanger 26 , with the help of a blower 207 .
  • a protective atmosphere circulates under the control of a blower 208 .
  • the circulation circuit comprises two parallel connected ducts, one duct 209 feeding the device 210 for projecting hot gases onto the strap and another duct 211 comprising a control valve 212 which opens more or less for modulating the quantity of gas transmitted to the device 210 for projecting hot gases.
  • the set temperature sensor 218 which measures the temperature of the strap at the installation exit, enables to control the valve 212 in order that it regulates the quantity of gas able to circulate through the duct 209 , and thus the preheating power of the projection device 210 , in order that the set temperature, measured by the sensor 218 , does not vary.
  • the installation represented in FIG. 2 , does not have the drawback of taking up much room, but it has other drawbacks.
  • the efficiency of the radiant burners used is not high.
  • the installation has an energetic efficiency which is relatively reduced and does not exceed a value in the order of 50%.
  • the whole installation comprising both chambers and the gas circuit for feeding the chambers for projecting gases onto the strap, contains a protective atmosphere which can be toxic and then does not fulfill the “hygienic” requirements for the combustion, or which is inert and expensive.
  • Preheating units with “regenerative” burners are otherwise known, notably from the document JP-2001/304 539.
  • the term “regenerative” indicates that, in a first phase, some heat extracted from combustion gases is accumulated, and, in a second phase, the accumulated heat is returned to the combustion air.
  • Such units usually comprise two burners 301 a, 301 b which are mounted in tandem, the one working in a combustion mode in which some combustion air in a duct 316 circulates through a regenerative mass 306 before participating to a combustion, and the other working in a heat recuperation mode in which the combustion gases from the first burner circulate through its regenerative mass 306 and heat it.
  • each burner 301 a, 301 b also comprises an air feeding device 308 which, in the regeneration mode, introduces post-combustion air which mixes with the combustion gases before these circulate through the regenerative mass 306 .
  • a regenerative mass can be formed of a ceramic, for example in the form of balls.
  • the efficiency of the heating unit is increased in a very important manner in comparison with that of simple open fire burners working in a reducing combustion atmosphere and used in an installation of the type described in reference to FIG. 1 .
  • FIG. 1 is a schematic view of a first example of a known installation for preheating a strap
  • FIG. 2 is a schematic view of a second example of a known installation for preheating a strap
  • FIG. 3 is a schematic view of an arrangement according to the invention.
  • FIG. 4 is a schematic representation of an installation according to the invention.
  • the invention implements a combination of characteristics of the installations represented in FIGS. 1 and 2 and of the regenerative burners represented in FIG. 3 , while reducing heat losses due to the use of heat exchangers.
  • the gases that are evacuated from the regenerative burners are projected onto the strap in the preheating zone, participate to a noticeable increase in the total thermal efficiency of the installation and enable to control the temperature.
  • a protective atmosphere which can be toxic exists only inside the heating chamber, and the installation thus works in good “hygienic” conditions for the combustion.
  • the invention relates to a process for heating a metallic strip to a set temperature needing the presence of a reducing combustion atmosphere, of the type comprising a preheating of the strip to an intermediary temperature needing not the presence of a protective atmosphere, by projecting hot gases towards at least one side of the strip, and a heating of the strip in a reducing combustion atmosphere from the intermediary temperature to the set temperature, with the control of the set temperature by varying the projection of hot gases for the preheating;
  • the preheating in a reducing combustion atmosphere is carried out by means of regenerative open fire burners in a first phase which comprises, in at least one first burner, a combustion with the help of air that has absorbed heat from a first thermal absorption mass, and, in at least one different burner, a heat absorption regeneration of the combustion gases from the first burner by at least one different thermal absorption mass, and in a second phase in which the functions of at least the first burner and at least the different burner on the one hand and the functions of the first thermal ab
  • the adjustment of the quantity of hot gases used for the preheating comprises the adjustment of the proportions of the hot gases transmitted to the projection step on the one hand and to the hot gas evacuation step on the other hand.
  • the quantity of air introduced for the mixing to the combustion gases is sufficient for the evacuated gases to have no reducing power.
  • the mixing of the combustion gases to the post-combustion air introduced before the passage of the combustion gases through the regenerative mass is adjusted according to the result of a measure of the reducing power of the combustion gases.
  • the process comprises the implement of a gas circulation directly from the heating step to the preheating step and the injection of post-combustion air between both these steps.
  • the intermediary temperature is in the order of 400° C.
  • the set temperature is a temperature for annealing the metallic strip
  • the metal of the metallic strip is steel
  • the metallic strip is a strap.
  • the invention also refers to an installation for heating a metallic strip to a set temperature needing the presence of a reducing combustion atmosphere, which comprises a preheating chamber provided with a projection device for projecting hot gases towards the strip, a heating chamber provided with an open fire heating unit for heating in a reducing combustion atmosphere, the heating unit comprising at least two regenerative burners working in tandem, at least one of the burners working in a combustion mode in which the combustion air circulates through a regenerative mass before participating to a combustion, and at least another burner working in a heat recuperation mode in which the combustion gases from at least the first burner circulate through the regenerative mass of the other burner and heat it, the at least two burners exchanging theirs working modes, each burner comprising an air feeding device working in a regeneration mode, in order that this air mixes up to the combustion gases in the reducing state before they circulate through the regenerative mass, a duct for evacuating the gases from the heating unit, an adjustable three-way valve with an entry connected to the duct for eva
  • the air feeding device working in a regeneration mode introduces an essentially constant quantity of air, which is at least sufficient for the evacuated gases to have always no reducing power.
  • a second control device which comprises a sensor for measuring the reducing power of the gases and an adjustment component for adjusting the introduced quantity of air according to the signal from the sensor for measuring the reducing power, controls the quantity of air introduced by the air feeding device.
  • the preheating and heating chambers are adjacent and collinear.
  • the installation further comprises a device for introducing post-combustion air between the preheating and heating chambers, the quantity of air introduced by this device being sufficient for the preheating chamber to contain gases with no reducing power.
  • the advantage of the invention is that it enables the realization of an installation with a reduced length, thanks to the considerable reduction of the preheating zone.
  • the advantage of the invention is that it is simpler, insofar as the strap follows a linear path.
  • the invention enables to considerably reduce energetic losses and to very significantly increase the energetic efficiency, essentially obtained by using units with regenerative burners and thanks to the absence of any heat.
  • the regenerative burners are implemented in order to obtain a temperature of the evacuated combustion gases which is much higher than in the state of the art.
  • the regenerative burners whether they work in an oxidizing atmosphere or in a reducing atmosphere, produce combustion gases at temperatures in the order of 150° C. It is partly for these reasons that all the known regenerative burners, including that of the type described in the document JP-2001/304 539, are implemented with an evacuation of the combustion gases to the atmosphere.
  • the burners work on the contrary so as to obtain a hot gas temperature which enables their direct use by projection into the preheating chamber, advantageously in the order of 400° C.
  • FIG. 4 is a schematic representation of an installation according to the invention, the FIGS. 1 to 3 having already been described.
  • the installation represented in FIG. 4 comprises a number of parts similar to those in FIG. 1 .
  • a strap 1 enters an oven 6 which comprises a first chamber 2 working in an oxidizing environment, or at least in an environment with no reducing power, and a second chamber 4 with a reducing combustion atmosphere.
  • the strap entry 8 enables only the passage of the atmosphere in the first chamber 2 , i.e. an atmosphere which is not toxic and which contains no CO, thanks to the introduction of post-combustion air through an entry 10 , with the help of a duct 12 .
  • the strap leaves the oven through an exit 14 at a set temperature, after passing the burners 16 .
  • These burners are supplied with fuel by a circuit 18 and with air by a circuit 20 .
  • the gases, which are evacuated in the end near the entry 8 leave the installation through a duct 24 which is connected, for example, to a smokestack.
  • the preheating chamber 2 comprises a device 11 for projecting hot gases for the preheating, which device is supplied with hot gases by the heating chamber 4 , as described afterwards.
  • Each open fire burner 16 is associated to a regenerative mass 26 , similar to the regenerative mass 306 described in reference to FIG. 3 .
  • a post-combustion air entry 28 is similar to the entry 308 described in reference to FIG. 3 .
  • Two burners 16 and 16 ′, arranged one opposite the other, work in tandem, in the manner described in reference to FIG. 3 .
  • the quantity of post-combustion air introduced through the entry 28 placed before the regenerative mass 26 can be sufficient for the gases evacuated by the burner to have always no reducing power. In that case, the burners work with an excess of post-combustion air.
  • a reducing power sensor (not represented) is incorporated in the burners, before or after the regenerative mass, in order to control the quantity of post-combustion air introduced in each burner. In this manner, the thermal efficiency is optimized and the energy consumption of the burners is reduced to the minimum.
  • the gases evacuated by the regenerative masses 26 are at a temperature which is sufficiently low for the transmission of a combustion gas evacuation duct 31 by a blower 30 to a three-way control valve 32 and to the hot gas projection device 11 , at a temperature which needs not the presence of a reducing combustion atmosphere for the strap.
  • the presence of a blower, which is in all the cases necessary to extract the combustion gases, further enables to take advantage of the dynamic pressure acquired by these gases to increase the thermal efficiency of the projection preheating. This also contributes to the increase in the efficiency of the system according to the invention.
  • a temperature sensor 34 for determining the set temperature of the strap 1 at the exit of the oven 6 .
  • a control circuit (non represented), for the control according to the temperature determined by the sensor 34 , controls an operation device 36 which adjusts the three-way valve 32 . In this manner, the quantity of gases evacuated from the burners, which is used for the preheating in the device 11 , can be regulated at a high reaction speed, necessary because of the high speed of the strap in the oven.
  • the heating chamber 4 in the installation represented in FIG. 4 has a length similar to that of the heating chamber 104 in the installation represented in FIG. 1 .
  • the preheating chamber 2 in the installation represented in FIG. 4 is much shorter than the chamber 102 in the installation represented in FIG. 1 .
  • the installation represented in FIG. 4 enables a linear passage of the strap 1 which is simply locally supported by some rolls inside the oven, contrary to the complex installation for the zigzag circulation of the strap in the installation represented in FIG. 2 .
  • the combustion gases can be used directly for the preheating, contrary to the installation represented in FIG. 2 which needs a heat exchanger between the combustion gases and the gases used for preheating the strap.
  • Another advantage of the invention lies in the fact that, thanks to the preheating to a high temperature and to the increase in the thermal efficiency of the regenerative masses in the burners, which can reach 80%, the evacuated smokes can contain reduced quantities of nitrogen oxides NOx, for example inferior to 200 mg/m 3 in normal conditions for 3% of oxygen in the smokes, when this system for preheating the combustion air is associated to a high-performance technique as regards pollutant emissions (for example flameless oxidation). Besides, thanks to the increase in the thermal efficiency of these high-performance burners, it is possible to heat the strap more quickly and thus to get an increase in productivity, with a reduction of fuel consumption and of nitrogen oxide emission.
  • the invention has thus important advantages, not only from the profitability and cost point of view, but also from the point of view of fossil resources preservation and of environment protection, thanks to the reduction of consumed fuel and emissions and to the increase in security.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Air Supply (AREA)
US12/601,446 2007-05-30 2008-05-20 Process and installation for heating a metallic strip, notably for an annealing Abandoned US20100213647A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0703823A FR2916764B1 (fr) 2007-05-30 2007-05-30 Procede et installation de chauffage d'une bande metallique, notamment en vue d'un recuit
FR0703823 2007-05-30
PCT/FR2008/050874 WO2008152275A2 (fr) 2007-05-30 2008-05-20 Procede et installation de chauffage d'une bande metallique, notamment en vue d'un recuit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2008/050874 A-371-Of-International WO2008152275A2 (fr) 2007-05-30 2008-05-20 Procede et installation de chauffage d'une bande metallique, notamment en vue d'un recuit

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US13/909,343 Continuation US9611519B2 (en) 2007-05-30 2013-06-04 Process and installation for heating a metallic strip, notably for an annealing

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US20100213647A1 true US20100213647A1 (en) 2010-08-26

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US13/909,343 Expired - Fee Related US9611519B2 (en) 2007-05-30 2013-06-04 Process and installation for heating a metallic strip, notably for an annealing

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US (2) US20100213647A1 (pt)
EP (1) EP2148935B1 (pt)
CN (1) CN101680049B (pt)
BR (1) BRPI0812050A2 (pt)
CA (1) CA2685404C (pt)
ES (1) ES2537780T3 (pt)
FR (1) FR2916764B1 (pt)
PL (1) PL2148935T3 (pt)
RU (1) RU2477325C2 (pt)
WO (1) WO2008152275A2 (pt)

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US20120264073A1 (en) * 2009-12-15 2012-10-18 Siemens Vai Metals Technologies Sas Equipment and method for preheating a continuously moving steel strip
US20130277896A1 (en) * 2007-05-30 2013-10-24 Gdf Suez Process and installation for heating a metallic strip, notably for an annealing
US9650304B2 (en) 2011-03-18 2017-05-16 Ngk Insulators, Ltd. Tunnel kiln for firing ceramic porous bodies
US20200326070A1 (en) * 2019-04-11 2020-10-15 Hertwich Engineering Gmbh Method for the continuous firing of combustion chambers with at least three regenerative burners

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US10641552B2 (en) * 2015-12-23 2020-05-05 Tesla, Inc. Heat-recovering temperature-gradient based oven system
RU2623525C1 (ru) * 2016-03-28 2017-06-27 Анатолий Аркадьевич Злобин Способ нагрева полосовой заготовки и устройство для его осуществления
AT517848B1 (de) * 2016-04-15 2017-05-15 Andritz Tech And Asset Man Gmbh Verfahren und ofenanlage zum wärmebehandeln von metallbändern
DE102017110273B4 (de) * 2017-05-11 2019-05-09 Ebner Industrieofenbau Gmbh Ofensystem mit Heißluftbeheizung
AT520131A2 (de) * 2017-07-13 2019-01-15 Andritz Tech & Asset Man Gmbh Verfahren zur reduktion von stickoxiden in bandbehandlungsöfen
AT520134B1 (de) * 2017-07-13 2020-03-15 Andritz Tech & Asset Man Gmbh Verfahren zur reduktion von stickoxiden in bandbehandlungsöfen
CN111043869B (zh) * 2019-12-23 2021-06-22 江苏省沙钢钢铁研究院有限公司 一种加热炉换热和蓄热联用式热回收系统及其运行方法
FR3114324B1 (fr) * 2020-09-23 2022-12-16 Fives Stein Section de prechauffage a flamme directe pour ligne continue de traitement de bandes metalliques
KR20230071153A (ko) * 2020-09-23 2023-05-23 파이브스 스탕 연속 금속 스트립 처리 라인을 위한 직접 화염 예열 섹션
CN114216347B (zh) * 2022-02-08 2022-09-30 北京科技大学 一种卧式快频蓄热式高压煤气加热工艺

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CN101680049A (zh) 2010-03-24
CN101680049B (zh) 2012-07-04
FR2916764B1 (fr) 2009-08-21
CA2685404A1 (fr) 2008-12-18
US20130277896A1 (en) 2013-10-24
CA2685404C (fr) 2015-06-30
ES2537780T3 (es) 2015-06-12
BRPI0812050A2 (pt) 2014-11-18
EP2148935A2 (fr) 2010-02-03
WO2008152275A2 (fr) 2008-12-18
FR2916764A1 (fr) 2008-12-05
WO2008152275A3 (fr) 2009-02-12
RU2477325C2 (ru) 2013-03-10
PL2148935T3 (pl) 2015-08-31
US9611519B2 (en) 2017-04-04
EP2148935B1 (fr) 2015-03-04
RU2009148828A (ru) 2011-07-10

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