EP2085488B1 - Dispositif de soufflage de gaz sur une face d'un matériau en bande en défilement - Google Patents

Dispositif de soufflage de gaz sur une face d'un matériau en bande en défilement Download PDF

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Publication number
EP2085488B1
EP2085488B1 EP08291203A EP08291203A EP2085488B1 EP 2085488 B1 EP2085488 B1 EP 2085488B1 EP 08291203 A EP08291203 A EP 08291203A EP 08291203 A EP08291203 A EP 08291203A EP 2085488 B1 EP2085488 B1 EP 2085488B1
Authority
EP
European Patent Office
Prior art keywords
profile
strip
plane
variable
tubular
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
EP08291203A
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German (de)
English (en)
French (fr)
Other versions
EP2085488A1 (fr
Inventor
Stéphane Langevin
Patrick Dubois
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.)
CMI Greenline Europe SAS
Original Assignee
CMI Thermline Services SAS
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Filing date
Publication date
Application filed by CMI Thermline Services SAS filed Critical CMI Thermline Services SAS
Publication of EP2085488A1 publication Critical patent/EP2085488A1/fr
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Classifications

    • 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
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5735—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • 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
    • C21D9/63—Continuous furnaces for strip or wire the strip being supported by a cushion of gas

Definitions

  • the present invention relates to a device for blowing gas onto a surface of a moving web material.
  • the invention particularly relates to steel or aluminum strip processing lines using at least one gas jet cooling chamber, or a gas jet cooling section, such as heat treatment lines, in particular particularly the continuous annealing lines, or such as the coating lines, in particular the galvanizing lines.
  • the invention is however not limited to the aforementioned field of use and more generally relates to the blowing of gas on one side of a moving strip material which may be a non-metallic material, for example paper, or plastic material for drying, cooling, or coating treatment as appropriate.
  • a moving strip material which may be a non-metallic material, for example paper, or plastic material for drying, cooling, or coating treatment as appropriate.
  • the aforementioned gas blowing devices thus comprise two hollow boxes, each of which is equipped with a plurality of tubular nozzles directed towards the relevant face of the strip material, each hollow box having, on the side facing the relevant face of the strip material, a flat profile parallel to the plane of the band.
  • the orifices of the tubular nozzles are at a sufficient distance from the band to avoid any risk of contact with the band which could mark the band material and damage it, or possibly tear tubular blowing nozzles.
  • the distance between the orifice of the blow nozzles and the strip rarely drops below a distance of 50 to 100 mm.
  • the invention aims to provide a gas blowing device that does not have the disadvantages and / or limitations of the prior systems mentioned above, and optimizing both the thermal and aerolics aspects of blowing, while minimizing the vibrations or offsets of band during the scrolling thereof, and for a cost of installation remaining reasonable.
  • a gas blowing device on one side of a moving strip material, comprising at least one hollow box equipped with a plurality of tubular nozzles directed towards the face in question.
  • web material wherein the hollow box has, on the side facing the relevant face of the web material, a surface whose profile is variable in at least a given direction, symmetrically by to a median plane perpendicular to the plane of the strip, and the tubular nozzles are fixed at their foot to the variable profile surface so that their respective axis is substantially orthogonal to said variable profile at the point considered, the tubular nozzles having a respective length which is chosen so that the outlets of said nozzles are in a common plane substantially parallel to the plane of the strip.
  • variable profile for the active surface of the hollow box or caissons, it is possible to obtain a very significant improvement in the recovery of the gases, without complicating the placement of the tubular nozzles thanks to their implantation which preserves the orthogonality of their axis relative to the bearing surface, and furthermore the arrangement of the nozzles with their length adapted to the variable profile guarantees an excellent homogeneity of the blowing, and consequently a notable advantage both for the homogeneity of the temperature in the strip material and for the stability of said strip material during the scrolling thereof, and whatever the variable profile retained.
  • the given direction in which the profile is variable may be transverse, or alternatively parallel to the running direction of the web material.
  • the profile may be variable both in a direction transverse to the running direction of the strip material and in a direction parallel to said direction of travel.
  • the variable profile is a dihedral profile, so as to provide a constant inclination of the tubular nozzles on either side of the median plane.
  • the aforementioned dihedral profile may be of convex or concave type, so that the median edge of the variable profile surface then corresponds respectively to the smallest distance or the greatest distance to the plane of the strip, depending on the technical effect sought for the application concerned.
  • the dihedral profile has an apex angle of between 150 ° and 170 °.
  • variable dihedral profile it will be possible to provide a broken line profile, or a curvilinear profile, so as to confer a variable inclination of the tubular nozzles on either side of the median plane.
  • variable profile surface has, on the inner side of the hollow box and at the foot of each tubular nozzle, a tulip-shaped orifice, and that each tubular nozzle has a free bore end con fl icting coniciently, these modalities providing significant advantages for the purpose of reducing pressure drop. This then makes it possible to use a very large number of blowing nozzles for optimum air and thermal efficiency, while using reasonable power.
  • the gas blowing device comprises two hollow boxes between which the strip material is intended to scroll, so that the blowing of gas simultaneously concerns both sides of the moving strip, and at least one of said boxes has a variable profile surface for the implantation of the associated tubular nozzles.
  • the two hollow boxes have a variable profile surface, and these two surfaces are symmetrical with respect to the passage plane of the strip.
  • tubular nozzles of the two hollow boxes are implanted so that the points of impact of the gas blown on the moving strip are staggered on either side of said strip when the given direction in which the profile is variable is transverse to the scroll direction strip material.
  • a staggered arrangement of the points of impact of the gas blown on the moving strip but along the length of said strip, and in the case of a variable profile both in a transverse direction and in a direction parallel to the running direction, we can provide an arrangement of the impact points staggered along the width and length of said strip.
  • FIGS. 1 to 3 illustrate a part of a blowing installation including a gas blowing noted 10 according to the invention.
  • the device 10 comprises, on either side of a scroll tape material marked 15, the running direction being symbolized by the arrow 100, a structural element 11, here in omega form, with wings marked 13, to which is fixed a hollow box 20, the strip material 15 flowing between the two hollow boxes opposite.
  • Each hollow box 20 has a rear face 21 to which a manifold 12 for blowing gas inlet is connected, as well as a front or active surface 22, opposite to the face 21, which is in turn facing the face concerned. web material 15, and two side faces 23.
  • Each hollow box 20 is equipped with a plurality of tubular nozzles 30 which are directed towards the relevant face of the strip material 15.
  • the surface 22 of each hollow box 20, which is turned towards the relevant face of the strip material 15, has a profile P which is variable in at least one given direction D, which is here a single direction transverse to the running direction 100 of the strip material 15, symmetrically with respect to a median plane Q perpendicular to the plane of the strip 15 (as is better visible on the figure 1 ), and the tubular nozzles 30 are fixed at their foot to the surface 22 of variable profile so that their respective axis is substantially orthogonal to said variable profile at the point considered (as is better visible on the detail of the figure 9 ).
  • each of the tubular nozzles 30 is chosen so that the outlet orifices of said nozzles are in a common plane (this common plane, denoted R, is better visible on the detail of the figure 8 ) which is substantially parallel to the plane of the band 15. Thanks to this last provision, we obtain jet distances that are identical over the entire width of the strip, and on both sides (of each side) thereof, which is favorable both for optimal stabilization during the running of said strip, and also for the homogeneity of the temperature in said band.
  • variable lengths (but important in absolute terms) of the tubular nozzles in fact do not substantially change the output velocities of the blown gas, and this is the equidistance of the nozzle orifices. relative to the plane of the strip which preserves the homogeneity of the action exerted by the gas blown on said strip.
  • variable profile P is a dihedral profile, so as to give a constant inclination of the tubular nozzles 30 on either side of the median plane Q, and this dihedral profile here is of convex type, so that the ridge median 24 of the variable profile surface 22 corresponds to the smallest distance to the plane of the strip 15.
  • two hollow caissons 20 are used between which the strip material 15 can pass, so that the blowing of gas simultaneously concerns both sides of the moving strip 15.
  • the two hollow boxes 20 have surfaces 22 with a variable profile P in the form of a convex dihedral, and these two surfaces are symmetrical with respect to the plane of the strip 15.
  • the inclination of each face of the dihedron is indicated by an angle ⁇ , and the apex angle (obtuse angle) is denoted ⁇ .
  • tubular nozzles 30 whose length 1 is from 250 to 300 mm, the tubular nozzles fixed at the edge 24 of the dihedral being species perpendicular to the plane of the strip, in the median plane Q, with a shorter length 1 which is of the order of 100 mm.
  • the interval of between the axes 35 of the adjacent tubular nozzles 30 (better visible on the detail of the figure 8 ) will then be of the order of 60 mm.
  • the convex type dihedral profile P can be very advantageous when one seeks to favor lateral recovery of the blowing gases, these gases escaping laterally along arrows 101 illustrated in FIGS. figures 1 and 5 , the figure 5 showing the divergent effect provided by the inclined arrangement of the two surfaces 22 on each side of the median plane Q, this divergent passage being of course favorable to an optimal lateral recovery of the blowing gases.
  • one of the caissons 20 has a surface 22 with a variable profile P, here in the form of a convex type dihedron, while the other housing 20 is of traditional type, with a surface 22 which is flat and parallel to the plane of the band in scrolling 15.
  • the two facing caissons 20 have a variable P profile surface, which is here a concave type dihedral profile, so that the median edge 24 of the variable profile surface 22 then corresponds to the greatest distance to the plane. of the band 15.
  • This embodiment will be reserved for moderate blowing power, posing fewer gas recovery problems, and for blowing privileging the central zone of the moving strip.
  • variable profiles P in convex or concave dihedron of the embodiments illustrated in FIGS. Figures 5 to 7 corresponds to an angle ⁇ whose value will generally be chosen between 5 ° and 15 °. This then corresponds to an angle at the top of the dihedral profile P, denoted ⁇ , whose value is between 150 ° and 170 °.
  • the tubular nozzles 30 Due to the orthogonality of the axis of each tubular nozzle 30 with respect to the dihedral profile, the tubular nozzles 30 have axes which are all parallel to the same direction on either side of the median plane Q.
  • variable inclination of the tubular nozzles 30 on either side of the median plane Q, towards the edges of the moving strip 15
  • other types of variable profiles can be provided. P, as has been illustrated, for example, in Figures 10 and 11 .
  • FIG 10 there is illustrated a broken line profile P 'which is distinguished three adjacent zones, respectively corresponding to angles ⁇ 1, ⁇ 2, ⁇ 3, with respect to the plane of the band, the angles ⁇ i being preferably increasing as and when that one approaches the edges of the band if one wishes to privilege the obtaining of a divergent effect for an optimal lateral recovery of the gases of blowing, as it was the case for the figure 5 with a convex dihedral profile.
  • FIGS. 8 and 9 provide a better understanding of the location and geometry of the tubular nozzles 30 fitted to a hollow box 20 whose active surface 22 has a variable profile, in this case an inclined active surface forming part of a convex dihedral profile.
  • the nozzles tubular 30 are implanted so that the impact points, denoted 40, of the gas blown on the moving strip 15 are staggered on either side of said strip.
  • Such an arrangement is favorable for the stability of the strip during the running thereof, and also promotes, in the cooling lines of a metal strip, the homogeneity of the cooling, creating adjacent cooling zones with a covering respective sides of the moving strip.
  • FIG. 9 it is better to distinguish the bottom plate 25 of the box 20, with one of its orifices 26 associated with a tubular nozzle 30 whose axis 35 is orthogonal to the plane of the bottom plate 25.
  • Each tubular nozzle 30 is fixed at its foot 33, and the orifice 26 has, at this foot 33, a tulip shape 34 whose radius is chosen to minimize the loss of pressure at the crossing of the orifice 26.
  • the tubular nozzle 30 As such, it further comprises a frustoconical first upstream portion 31 which is fixed, in particular welded, to the bottom plate 25, and a second cylindrical downstream portion 32 whose free end 37 is arranged to present a bore. interior which flares conically to the outlet orifice 36. It may for example opt for a divergence of the order of 15 °. This double taper of the gas passage provides a nozzle effect which is favorable for the flow thereof and also minimizes pressure losses.
  • tubular nozzles such that the axis of said nozzles is also orthogonal to the carrier wall in a longitudinal vertical plane in the direction of the band (as is best seen on the figure 3 ).
  • the direction D in which the profile P is variable is not transverse to the running direction of the web material 100 as was the case in the previously described variants, but parallel to said direction of travel.
  • Such an arrangement makes it possible to better control the frequencies of the vibrations of the band. This will be particularly interesting for application to zinc spin systems on steel strips.
  • the arrangement according to the invention also makes it possible to reduce to a minimum the distance between the band and the orifices of the tubular nozzles, this distance being able for example to be of the order of 50 mm, and sometimes even less for certain sizes. Finally, this arrangement is very favorable with regard to an antivibration and self-stabilizing effect for the moving strip, even for very high speeds of scrolling.
  • the device of the invention can be used with paper strips, which are more fragile as metal strips, for drying, cooling, or coating treatments.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nozzles (AREA)
  • Advancing Webs (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manipulator (AREA)
  • Toys (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Coating With Molten Metal (AREA)
  • Coating Apparatus (AREA)
EP08291203A 2007-12-28 2008-12-17 Dispositif de soufflage de gaz sur une face d'un matériau en bande en défilement Active EP2085488B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0709166A FR2925919B1 (fr) 2007-12-28 2007-12-28 Dispositif de soufflage de gaz sur une face d'un materiau en bande en defilement
FR0805843A FR2925920A1 (fr) 2007-12-28 2008-10-22 Dispositif de soufflage de gaz sur une face d'un materiau en bande de defilement

Publications (2)

Publication Number Publication Date
EP2085488A1 EP2085488A1 (fr) 2009-08-05
EP2085488B1 true EP2085488B1 (fr) 2010-09-22

Family

ID=39569927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08291203A Active EP2085488B1 (fr) 2007-12-28 2008-12-17 Dispositif de soufflage de gaz sur une face d'un matériau en bande en défilement

Country Status (10)

Country Link
US (1) US20100269367A1 (pt)
EP (1) EP2085488B1 (pt)
CN (1) CN101910424B (pt)
AT (1) ATE482293T1 (pt)
BR (1) BRPI0821703B1 (pt)
CA (1) CA2710590C (pt)
DE (1) DE602008002696D1 (pt)
FR (2) FR2925919B1 (pt)
RU (1) RU2437944C1 (pt)
WO (1) WO2009103891A2 (pt)

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ATE494968T1 (de) * 2008-03-14 2011-01-15 Arcelormittal France Verfahren und vorrichtung zum blasen von gas auf ein laufendes band
EP2631013B1 (en) * 2012-02-21 2014-10-01 Cockerill Maintenance & Ingenierie S.A. Coating thickness and distribution control wiping nozzle with excellent pressure uniformity
CN103567238B (zh) * 2013-11-07 2015-08-26 杨海西 钢板冷却装置
FR3030705A1 (fr) * 2014-12-17 2016-06-24 Andritz Perfojet Sas Installation de sechage d'un voile de non-tisse humide
CN104630435B (zh) * 2015-03-17 2016-09-07 中冶南方(武汉)威仕工业炉有限公司 用于抑制气体冷却过程带钢振动的喷箱装置
EP3173495A1 (en) * 2015-11-25 2017-05-31 Cockerill Maintenance & Ingenierie S.A. Method and device for reaction control
CN107532227B (zh) * 2015-05-07 2020-01-10 考克利尔维修工程 反应控制的方法和装置
FR3069553B1 (fr) * 2017-07-26 2020-05-22 Stephane LANGEVIN Dispositif pour souffler un fluide gazeux sur une surface
US20220033930A1 (en) * 2018-10-30 2022-02-03 Tata Steel Ijmuiden B.V. Annealing line for a steel strip
PL3763836T3 (pl) 2019-07-11 2023-09-11 John Cockerill S.A. Urządzenie chłodzące do nadmuchiwania gazu na powierzchnię przemieszczającej się taśmy
CN113237317B (zh) * 2021-04-15 2022-12-23 重庆市开州区荣邦服饰有限公司 一种不易堵塞的纺织品用蒸汽烘干设备

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Also Published As

Publication number Publication date
CA2710590A1 (fr) 2009-08-27
CN101910424A (zh) 2010-12-08
WO2009103891A3 (fr) 2009-11-12
WO2009103891A2 (fr) 2009-08-27
CA2710590C (fr) 2012-03-13
EP2085488A1 (fr) 2009-08-05
BRPI0821703B1 (pt) 2017-06-06
BRPI0821703A2 (pt) 2015-06-16
ATE482293T1 (en) 2010-10-15
US20100269367A1 (en) 2010-10-28
CN101910424B (zh) 2012-09-05
RU2437944C1 (ru) 2011-12-27
FR2925919A1 (fr) 2009-07-03
FR2925919B1 (fr) 2010-06-11
BRPI0821703A8 (pt) 2016-11-01
DE602008002696D1 (en) 2010-11-04
FR2925920A1 (fr) 2009-07-03

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