EP2145981B1 - Device and method for spraying pickling and/or washing liquid onto a metallic band - Google Patents

Device and method for spraying pickling and/or washing liquid onto a metallic band Download PDF

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Publication number
EP2145981B1
EP2145981B1 EP09009126.5A EP09009126A EP2145981B1 EP 2145981 B1 EP2145981 B1 EP 2145981B1 EP 09009126 A EP09009126 A EP 09009126A EP 2145981 B1 EP2145981 B1 EP 2145981B1
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EP
European Patent Office
Prior art keywords
pipe
nozzle
pickling
nozzle pipe
feed pipe
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EP09009126.5A
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German (de)
French (fr)
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EP2145981A2 (en
EP2145981A3 (en
Inventor
Peter Schüler
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SMS Group GmbH
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SMS Siemag AG
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/20—Arrangements of several outlets along elongated bodies, e.g. perforated pipes or troughs, e.g. spray booms; Outlet elements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/022—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • B05B15/658—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits the spraying apparatus or its outlet axis being perpendicular to the flow conduit

Definitions

  • the invention relates to a device for spraying pickling and / or rinsing liquid on a metallic material to be treated, in particular steel strip or metal strip, with a nozzle tube in the wall on the treated material directed spray nozzles are integrated, wherein the nozzle tube has a closed end and an open end the latter, for supplying the pickling and / or rinsing liquid into the nozzle tube.
  • the invention also relates to a method of operating such a device.
  • the pickling medium in modern pickle containers is injected by means of nozzle tubes into a flat, liquid-filled channel through which the steel strip is drawn.
  • the nozzles are evenly distributed over the length of the pipe.
  • These nozzle tubes are e.g. known from the turbulence pickling.
  • the pickling medium is introduced into the pipe on one side and exits through nozzle openings which are regularly distributed over the width of the pickling tank. At the end the pipeline is closed. In principle, this causes a different distribution of the outflowing liquid. With the same geometry of the nozzles is located on the first in the flow flow nozzles the highest volume flow / pressure and the lowest volume flow / pressure at the last nozzles in the pipe. This is caused by the pressure drop occurring with increasing length of the pipe.
  • the EP 1 122 338 B1 relates to a device for spraying pickling or rinsing liquid on an elongated, metallic material to be treated, in particular metal strip, comprising in a pickling tank or the like above and / or below the transport plane of the material in the container walls arranged, formed with spray nozzles, connected to a liquid supply, outer cylindrical spray tubes, wherein the outer spray tube is arranged sealed on an inner tube which is formed with provided in the longitudinal distance of the spray nozzles of the outer spray tube in a row openings and aligned in situ with these openings pointing to the material to be treated and aligned with the spray nozzles of the outer spray tube is.
  • the outer spray tube is adjustable about its longitudinal axis, at least two spaced nozzle rows (I to IV) and the openings of the inner tube are formed as slots.
  • the EP 1 154 043 B1 relates to a plant for the surface treatment of a metal strand, in particular for pickling a steel strip, with a treatment channel formed for the longitudinally movable metal strand and with adjustable to the surface of Metallistranges spray nozzles, which are connected to a nozzle tube for the supply of the treatment liquid. It is provided that the specialistsshannal- formed by a Bodenausmautation and side walls cross-section at the top is limited by a float and that the spray nozzles each from a directed downwards on the metal strand, steep position to a formed between the metal strand and the float treatment channel at a sharp, shallow angle are adjustable with the injection direction against the direction of movement of the metal strand.
  • the invention has the object to improve or further develop the known devices and methods while maintaining the previous advantages in such a way that the disadvantages mentioned are avoided, in particular, a homogenization of the spray pattern should be achieved.
  • a feed tube in the region of the spray nozzles is arranged in the interior of the nozzle tube so that one of the two open ends of the feed tube is spaced from the closed end of the nozzle tube.
  • the main part of the pickling and rinsing medium supplied on one side into the feed tube can flow losslessly to the last injection nozzle, which is arranged in the region of the closed end of the nozzle tube.
  • the last injection nozzle which is arranged in the region of the closed end of the nozzle tube.
  • the feed tube At the other open end of the medium exits the feed tube and then bounces against the closed end of the nozzle tube, there to possibly also in a space between the feed tube and the nozzle tube to swirl.
  • In the entire gap then adjusts a pressure equalization. Due to the same or uniform pressure and the resulting uniform flow distribution in the intermediate space and thus at all spray nozzles, then a uniform spraying of the material to be treated over its entire width with the pickling and flushing medium is possible.
  • a desired uniform distribution of the medium can be achieved on the material to be treated.
  • the cross-sectional area of the outer nozzle tube is between 2.5 to 3.5 times the cross-sectional area of the inner feed tube.
  • the length of the inner feed tube ends at least before the last nozzle of the outer nozzle tube.
  • the object underlying the invention is achieved with respect to the method according to the invention that the pickling and / or rinsing liquid is introduced under pressure into the open end of the nozzle tube and at the same time in the open end of the inner feed tube facing away from the closed end of the nozzle tube; in that the portion of the pickling and / or rinsing liquid introduced into the inner feed tube flows through the feed tube with almost no pressure loss and then exits the other open end of the feed tube, bouncing and repelling the spaced closed end of the nozzle tube to fluidize in the region between the closed end of the nozzle tube and the facing open end of the feed tube and possibly also in a gap between the inner feed tube and the nozzle tube; and that the pressurized pickling and / or rinsing liquid is sprayed in the intermediate space via the spray nozzles to the outside of the nozzle tube to the treated material.
  • the device according to the invention is generally designated 10 and is used for spraying pickling and / or rinsing liquid on an elongated, metallic Material 12, in particular steel strip or metal strip. It is in the Fig. 1 a device according to the prior art and in the Fig. 2 a device 10 according to the invention shown.
  • the device 10 according to the invention is provided with a treatment channel, not shown separately for the longitudinally movable material 12 to be treated, for receiving residues of the pickling and rinsing liquid flowing off the material to be treated.
  • the device to the surface 13 of the material to be treated 12 directed, preferably adjustable spray nozzles 14 which are integrated into the wall of a nozzle tube 15.
  • the supply of pickling and / or rinsing liquid 11 is provided from one side of the nozzle tube 15.
  • the device 10 with one-sided supply of pickling and / or rinsing liquid 11 from an outer nozzle tube 16 with integrated therein spray nozzles 14 and an inner feed pipe 17, see the Fig. 2 the drawing.
  • the main part of the unilaterally supplied medium flows lossless through the inner feed pipe to the last nozzle opening. At the end of the feed tube 17, the medium emerges and there is a uniform flow distribution over the bandwidth of the material to be treated.
  • the cross-sectional area of the outer nozzle tube 16 corresponds to between 2.5 and 3.5 times the cross-sectional area of the inner feed tube 17.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Aufspritzen von Beiz- und/oder Spülflüssigkeit auf ein metallisches Behandlungsgut, insbesondere Stahlband oder Metallband, mit einem Düsenrohr in dessen Wandung auf das Behandlungsgut gerichtete Spritzdüsen integriert sind, wobei das Düsenrohr ein geschlossenes Ende und ein offenes Ende aufweist, letzteres zum Zuführen der Beiz- und/oder Spülflüssigkeit in das Düsenrohr. Die Erfindung bezieht sich außerdem auf ein Verfahren zum Betrieb einer derartigen Vorrichtung.The invention relates to a device for spraying pickling and / or rinsing liquid on a metallic material to be treated, in particular steel strip or metal strip, with a nozzle tube in the wall on the treated material directed spray nozzles are integrated, wherein the nozzle tube has a closed end and an open end the latter, for supplying the pickling and / or rinsing liquid into the nozzle tube. The invention also relates to a method of operating such a device.

Grundsätzlich wird zur Erhöhung der Beizwirkung in Beizen für Stähle (C- Stähle und Rostfreistähle) und Metalle (z.B. Titanlegierungen) das Beizmedium in modernen Beizenbehältern mittels Düsenrohren in einen flachen, mit Flüssigkeit gefüllten Kanal eingespritzt, durch den das Stahlband gezogen wird. Die Düsen sind gleichmäßig über die Länge des Rohres verteilt. Diese Düsenrohre sind z.B. aus der Turbulenzbeize bekannt.Basically, to increase pickling in steels for steels (C steels and stainless steels) and metals (e.g., titanium alloys), the pickling medium in modern pickle containers is injected by means of nozzle tubes into a flat, liquid-filled channel through which the steel strip is drawn. The nozzles are evenly distributed over the length of the pipe. These nozzle tubes are e.g. known from the turbulence pickling.

Üblicherweise wird das Beizmedium an einer Seite in das Rohr eingeleitet und tritt durch Düsenöffnungen, die regelmäßig über die Breite des Beizbehälters verteilt sind, aus. Am Ende ist die Rohrleitung geschlossen. Dabei stellt sich Prinzip bedingt eine unterschiedliche Verteilung der ausströmenden Flüssigkeit ein. Bei gleicher Geometrie der Düsen liegt an den zuerst im Strömungsfluss liegenden Düsen der größte Volumenstrom/Druck und an den letzten im Rohr liegenden Düsen der geringste Volumenstrom/Druck vor. Dies wird durch den mit zunehmender Länge des Rohres auftretenden Druckabfall verursacht.Usually, the pickling medium is introduced into the pipe on one side and exits through nozzle openings which are regularly distributed over the width of the pickling tank. At the end the pipeline is closed. In principle, this causes a different distribution of the outflowing liquid. With the same geometry of the nozzles is located on the first in the flow flow nozzles the highest volume flow / pressure and the lowest volume flow / pressure at the last nozzles in the pipe. This is caused by the pressure drop occurring with increasing length of the pipe.

Dies kann durch unterschiedliche Ausbildung der Düsen z.B. durch in Strömungsrichtung gesehen kleiner werdende Düsenöffnungen oder durch eine Verengung des Düsenrohres zum Ende hin ausgeglichen werden. Dies gilt streng genommen aber nur für einen speziellen Betriebspunkt, da sich bei vorgegebenem Druck dort die entsprechenden durch die Geometrie eingestellten Volumenströme einstellen. Wird der Druck variiert, verändern sich die Ausströmungen der verschiedenen Düsen und es stellt sich wieder eine ungleiche Verteilung ein. Die Betriebsweise moderner Beizlinien benötigt eine Druckveränderung des zugeführten Beizmediums, um die Beizwirkung und den Temperaturaustausch zum Stahlband einzustellen.This can be achieved by different design of the nozzles e.g. be compensated by seen in the flow direction smaller nozzle openings or by a narrowing of the nozzle tube towards the end. Strictly speaking, however, this applies only to a specific operating point, since the corresponding volume flows set by the geometry are set at a given pressure there. If the pressure varies, the outflows of the different nozzles change and again an unequal distribution occurs. The mode of operation of modern pickling lines requires a pressure change of the pickling medium fed in to adjust the pickling action and the temperature exchange to the steel strip.

Bezogen auf das zu beizende Produkt führt eine unterschiedliche Strömungsverteilung über die Bandbreite gesehen zu unterschiedlichem Beizangriff und damit zu Beeinträchtigungen der Produktqualität. Ebenfalls stellen sich unterschiedliche Strömungsverhältnisse im Beizbecken ein, die zu Ablagerungen und Absetzerscheinungen (Schlammbildung) führen. Die Düsen, die der Zuführung am nächsten liegen, erzeugen eine hohe Strömungsgeschwindigkeit in dem Beizbecken und die, die am Ende des Düsenrohres liegen, erzeugen eine geringere Strömungsgeschwindigkeit. Damit gibt es Bereiche im Behälter, bei denen die Schwebestoffe im Beizmedium aufgrund geringerer Strömungsgeschwindigkeit nicht in Bewegung gehalten werden können. Es besteht die Gefahr des Absetzens und Verschlammens des Behälters (Totbereiche des Behälters).With regard to the product to be dyed, a different flow distribution over the bandwidth leads to different pickling attack and thus to impairment of the product quality. Also set different flow conditions in the pickling tank, which lead to deposits and sedimentation (sludge formation). The nozzles closest to the feeder produce a high flow rate in the pickling tank and those located at the end of the nozzle pipe produce a lower flow velocity. Thus, there are areas in the container in which the suspended matter in the pickling medium can not be kept in motion due to lower flow velocity. There is a risk of settling and silting of the container (dead zones of the container).

Bezüglich des Standes der Technik sei dazu beispielhaft auf die folgenden Druckschriften verwiesen:With regard to the state of the art, reference is made by way of example to the following documents:

Die EP 1 122 338 B1 betrifft eine Vorrichtung zum Aufspritzen von Beiz- oder Spülflüssigkeit auf ein langgestrecktes, metallisches Behandlungsgut, insbesondere Metallband, umfassend in einem Beizbehälter oder dergleichen ober- und/oder unterhalb der Transportebene des Behandlungsgutes in den Behälterwandungen angeordnete, mit Spritzdüsen ausgebildete, an eine Flüssigkeitsversorgung angeschlossene, äußere zylindrische Spritzrohre, wobei das äußere Spritzrohr abgedichtet auf einem Innenrohr angeordnet ist, das mit im Längenabstand der Spritzdüsen des äußeren Spritzrohres in einer Reihe vorgesehenen Öffnungen ausgebildet ist und in situ mit diesen Öffnungen auf das Behandlungsgut weisend sowie mit den Spritzdüsen des äußeren Spritzrohres fluchtend ausgebildet ist. Dabei ist vorgesehen, dass das äußere Spritzrohr um seine Längsachse verstellbar ist, mindestens zwei voneinander beabstandete Düsenreihen (I bis IV) aufweist und die Öffnungen des Innenrohres als Langlöcher ausgebildet sind. Mit einer derartigen Ausbildung sollen insbesondere die Stand- bzw. Betriebszeiten der Spritzrohre erhöht werden, wobei es dabei in einfacher Weise möglich sein soll, entweder in vorbestimmten Zeitintervallen oder bei ermittelten Verstopfungen von Spritzdüsen einer in die Betriebslage gestellten Düsenreihe durch lediglich Verdrehen des äußeren Spritzrohres eine saubere Düsenreihe in Einsatz zu bringen. Nachteilig ist bei dieser Ausführung insbesondere der hohe konstruktive Aufwand.The EP 1 122 338 B1 relates to a device for spraying pickling or rinsing liquid on an elongated, metallic material to be treated, in particular metal strip, comprising in a pickling tank or the like above and / or below the transport plane of the material in the container walls arranged, formed with spray nozzles, connected to a liquid supply, outer cylindrical spray tubes, wherein the outer spray tube is arranged sealed on an inner tube which is formed with provided in the longitudinal distance of the spray nozzles of the outer spray tube in a row openings and aligned in situ with these openings pointing to the material to be treated and aligned with the spray nozzles of the outer spray tube is. It is provided that the outer spray tube is adjustable about its longitudinal axis, at least two spaced nozzle rows (I to IV) and the openings of the inner tube are formed as slots. With such a training, in particular the stand or operating times of the spray pipes are to be increased, and it should be possible in a simple manner, either at predetermined time intervals or determined blockages of spray nozzles of a nozzle in the operating position by merely rotating the outer spray tube a to bring clean nozzle row into use. The disadvantage of this design, in particular the high design complexity.

Die EP 1 154 043 B1 betrifft eine Anlage für die Oberflächenbehandlung eines Metallstranges, insbesondere zum Beizen eines Stahlbandes, mit einem für den in Längsrichtung beweglichen Metallstrang gebildeten Behandlungskanal und mit zur Oberfläche des Metalistranges einstellbaren Spritzdüsen, die an ein Düsenrohr für die Zufuhr der Behandlungsflüssigkeit angeschlossen sind. Dabei ist vorgesehen, dass der durch eine Bodenausmauerung und Seitenwände gebildete Behandlungskänal- Querschnitt an der Oberseite mittels eines Schwimmkörpers begrenzt ist und dass die Spritzdüsen jeweils von einer nach unten auf den Metallstrang gerichteten, steilen Stellung bis in einen zwischen dem Metallstrang und dem Schwimmkörper gebildeten Behandlungskanal unter einem spitzen, flachen Winkel mit Spritzrichtung entgegen der Bewegungsrichtung des Metallstrangs einstellbar sind. Dadurch soll es möglich sein, zum Beizen, Spülen, Reinigen oder Entfetten die kinetische Energie an den Spritzdüsen in Abhängigkeit einer Dichtwirkung am Ausgang des Behandlungskanales zu regulieren bzw. die kinetische Energie am Einlauf zu erhöhen oder reduzieren.The EP 1 154 043 B1 relates to a plant for the surface treatment of a metal strand, in particular for pickling a steel strip, with a treatment channel formed for the longitudinally movable metal strand and with adjustable to the surface of Metallistranges spray nozzles, which are connected to a nozzle tube for the supply of the treatment liquid. It is provided that the Behandlungskänal- formed by a Bodenausmauerung and side walls cross-section at the top is limited by a float and that the spray nozzles each from a directed downwards on the metal strand, steep position to a formed between the metal strand and the float treatment channel at a sharp, shallow angle are adjustable with the injection direction against the direction of movement of the metal strand. This should make it possible for pickling, rinsing, cleaning or degreasing to regulate the kinetic energy at the spray nozzles as a function of a sealing effect at the outlet of the treatment channel or to increase or reduce the kinetic energy at the inlet.

Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, die bekannten Vorrichtungen bzw. Verfahren unter Beibehaltung der bisherigen Vorteile in der Weise zu verbessern bzw. weiterzuentwickeln, dass die genannten Nachteile vermieden werden, wobei insbesondere eine Vergleichmäßigung des Spritzbildes erreicht werden soll.Based on this, the invention has the object to improve or further develop the known devices and methods while maintaining the previous advantages in such a way that the disadvantages mentioned are avoided, in particular, a homogenization of the spray pattern should be achieved.

Die Aufgabe wird bezüglich der eingangs genannten Vorrichtung erfindungsgemäß dadurch gelöst, dass ein Zuführungsrohr im Bereich der Spritzdüsen im Innern des Düsenrohres so angeordnet ist, dass eines der beiden offenen Enden des Zuführungsrohres dem geschlossenen Ende des Düsenrohres beabstandet gegenüber steht.The object is achieved with respect to the device mentioned above according to the invention in that a feed tube in the region of the spray nozzles is arranged in the interior of the nozzle tube so that one of the two open ends of the feed tube is spaced from the closed end of the nozzle tube.

Durch die beanspruchte Anordnung von Düsenrohr und innerem Zuführungsrohr kann der Haupteil des einseitig in das Zuführungsrohr zugeführten Beiz- und Spü-Imediums verlustfrei bis zur letzten Spritzdüse, die im Bereich des geschlossenen Endes des Düsenrohres angeordnet ist, strömen. Am anderen offenen Ende tritt das Medium aus dem Zuführungsrohr aus und prallt dann gegen das geschlossene Ende des Düsenrohres, um dort eventuell auch in einen Zwischenraum zwischen dem Zuführungsrohr und dem Düsenrohr zu verwirbeln. In dem gesamten Zwischenraum stellt sich dann ein Druckausgleich ein. Aufgrund des gleichen bzw. einheitlichen Druckes und der daraus resultierenden gleichmäßigen Strömungsverteilung in dem Zwischenraum und damit an allen Spritzdüsen, ist dann ein gleichmäßiges Besprühen des Behandlungsgutes über dessen gesamter Breite mit dem Beiz- und Spülmedium möglich. Somit kann trotz einseitiger Zuführung und prozessbedingt zeitlich unterschiedlich eingestellter Drücke immer eine gewünschte Gleichverteilung des Mediums auf dem Behandlungsgut erzielt werden.Due to the claimed arrangement of the nozzle tube and the inner feed tube, the main part of the pickling and rinsing medium supplied on one side into the feed tube can flow losslessly to the last injection nozzle, which is arranged in the region of the closed end of the nozzle tube. At the other open end of the medium exits the feed tube and then bounces against the closed end of the nozzle tube, there to possibly also in a space between the feed tube and the nozzle tube to swirl. In the entire gap then adjusts a pressure equalization. Due to the same or uniform pressure and the resulting uniform flow distribution in the intermediate space and thus at all spray nozzles, then a uniform spraying of the material to be treated over its entire width with the pickling and flushing medium is possible. Thus, despite one-sided feeding and process-related temporally differently set pressures always a desired uniform distribution of the medium can be achieved on the material to be treated.

Bei der bevorzugten Ausführungsform der vorliegende Erfindung ist vorgesehen, dass die Querschnittsfläche des äußeren Düsenrohres zwischen 2,5 bis 3,5 mal der Querschnittsfläche des inneren Zuführungsrohres entspricht. Diese Ausbildung ergab sich insbesondere aus Messungen und theoretischen Überlegungen der Strömungstechnik zur Erzielung einer gleichmäßigen Strömungsverteilung.In the preferred embodiment of the present invention, it is provided that the cross-sectional area of the outer nozzle tube is between 2.5 to 3.5 times the cross-sectional area of the inner feed tube. This training resulted in particular from measurements and theoretical considerations of flow technology to achieve a uniform flow distribution.

Nach einem weiteren Merkmal der vorliegenden Erfindung ist vorgesehen, dass die Länge des inneren Zuführungsrohres mindestens vor der letzten Spritzdüse des äußeren Düsenrohres endet.According to a further feature of the present invention it is provided that the length of the inner feed tube ends at least before the last nozzle of the outer nozzle tube.

Die der Erfindung zu Grunde liegende Aufgabe wird bezüglich des Verfahrens erfindungsgemäß dadurch gelöst, dass die Beiz- und/oder Spülflüssigkeit unter Druck in das offene Ende des Düsenrohres und gleichzeitig in das dem geschlossenen Ende des Düsenrohres abgewandte offene Ende des inneren Zuführungsrohres eingebrachtwird; dass der Anteil an der Beiz- und/oder Spülflüssigkeit, welcher in das innere Zuführungsrohr eingebracht wird, nahezu ohne Druckverlust durch das Zuführungsrohr fließt, um dann aus dem anderen offenen Ende des Zuführungsrohres auszutreten, gegen das beabstandete geschlossenen Ende des Düsenrohres zu prallen und um in dem Bereich zwischen dem geschlossenen Ende des Düsenrohres und dem zugewandten offenen Ende des Zuführungsrohres und eventuell auch in einen Zwischenraum zwischen dem inneren Zuführungsrohr und dem Düsenrohr hinein zu verwirbeln; und dass die unter Druck stehende Beiz- und/oder Spülflüssigkeit in dem Zwischenraum über die Spritzdüsen nach außerhalb des Düsenrohres auf das Behandlungsgut gespritzt wird.The object underlying the invention is achieved with respect to the method according to the invention that the pickling and / or rinsing liquid is introduced under pressure into the open end of the nozzle tube and at the same time in the open end of the inner feed tube facing away from the closed end of the nozzle tube; in that the portion of the pickling and / or rinsing liquid introduced into the inner feed tube flows through the feed tube with almost no pressure loss and then exits the other open end of the feed tube, bouncing and repelling the spaced closed end of the nozzle tube to fluidize in the region between the closed end of the nozzle tube and the facing open end of the feed tube and possibly also in a gap between the inner feed tube and the nozzle tube; and that the pressurized pickling and / or rinsing liquid is sprayed in the intermediate space via the spray nozzles to the outside of the nozzle tube to the treated material.

Bezüglich der sich ergebenden Vorteile dieses Verfahrens wird zur Vermeidung von Wiederholungen auf die beschriebenen Vorteile der erfindungsgemäßen Vorrichtung verwiesen.With regard to the resulting advantages of this method, reference is made to the avoidance of repetition on the described advantages of the device according to the invention.

Unter Verwendung der erfindungsgemäßen Vorrichtung werden Verschlammung und ruhende Flüssigkeitsbereiche im Düsenrohr aufgrund der erfindungsgemäß realisierten Vergleichmäßigung der Eindüsung vermieden. Messungen haben dabei eine symmetrisch zur Mitte des Düsenrohres angeordnete Strömung durch die Verwendung des inneren Zuführungsrohres ergeben.By using the device according to the invention sludging and dormant liquid areas in the nozzle tube are avoided due to the equalization of the injection realized according to the invention. Measurements have shown a symmetrically arranged to the center of the nozzle tube flow through the use of the inner feed tube.

Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen und aus der nachfolgenden Beschreibung, in der die in den Figuren der Zeichnung dargestellte Ausführungsform der Erfindung näher erläutert wird. Dabei sind neben den oben angeführten Kombinationen von Merkmalen auch Merkmale allein oder in anderen Kombinationen erfindungswesentlich.Further advantages and details of the invention will become apparent from the subclaims and from the following description in which the embodiment of the invention shown in the figures of the drawing is explained in more detail. In addition to the above-mentioned combinations of features, features alone or in other combinations are essential to the invention.

Es zeigen:

Fig. 1
eine schematische Querschnittsansicht einer Vorrichtung zum Aufspritzen von Beiz- und/oder Spülflüssigkeit gemäß dem Stand der Technik,
Fig. 2
eine schematische Querschnittsansicht einer Vorrichtung zum Aufspritzen von Beiz- und/oder Spülflüssigkeit gemäß der vorliegenden Erfindung,
Fig. 3
eine schematische Darstellung der Strömungsverteilung der erfindungsgemäßen Vorrichtung im Vergleich zum Stand der Technik.
Show it:
Fig. 1
a schematic cross-sectional view of an apparatus for spraying pickling and / or rinsing liquid according to the prior art,
Fig. 2
a schematic cross-sectional view of a device for spraying pickling and / or rinsing liquid according to the present invention,
Fig. 3
a schematic representation of the flow distribution of the device according to the invention in comparison with the prior art.

Die erfindungsgemäße Vorrichtung ist generell mit 10 bezeichnet und dient zum Aufspritzen von Beiz- und/oder Spülflüssigkeit auf ein langgestrecktes, metallisches Behandlungsgut 12, insbesondere Stahlband oder Metallband. Es ist dazu in der Fig. 1 eine Vorrichtung gemäß dem Stand der Technik und in der Fig. 2 eine erfindungsgemäße Vorrichtung 10 dargestellt. Die erfindungsgemäße Vorrichtung 10 ist mit einem für das in Längsrichtung bewegliche Behandlungsgut 12 gebildeten, in den Fig. nicht separat dargestellten Behandlungskanal zum Aufnehmen von von dem Behandlungsgut abfließenden Resten der Beiz- und Spülflüssigkeit versehen. Außerdem weist die Vorrichtung zur Oberfläche 13 des Behandlungsgutes 12 gerichtete, vorzugsweise einstellbare Spritzdüsen 14 auf, die in die Wandung eines Düsenrohres 15 integriert sind. Die Zuführung der Beiz- und/oder Spülflüssigkeit 11 ist von einer Seite des Düsenrohres 15 vorgesehen. Bei der in der Fig. 1 dargestellten Vorrichtung gemäß dem Stand der Technik ergeben sich dabei die oben ausführlich beschriebenen Probleme.The device according to the invention is generally designated 10 and is used for spraying pickling and / or rinsing liquid on an elongated, metallic Material 12, in particular steel strip or metal strip. It is in the Fig. 1 a device according to the prior art and in the Fig. 2 a device 10 according to the invention shown. The device 10 according to the invention is provided with a treatment channel, not shown separately for the longitudinally movable material 12 to be treated, for receiving residues of the pickling and rinsing liquid flowing off the material to be treated. In addition, the device to the surface 13 of the material to be treated 12 directed, preferably adjustable spray nozzles 14 which are integrated into the wall of a nozzle tube 15. The supply of pickling and / or rinsing liquid 11 is provided from one side of the nozzle tube 15. When in the Fig. 1 In the case of the device according to the prior art, the problems described in detail above arise.

Es ist deshalb bei der erfindungsgemäßen Vorrichtung 10 vorgesehen, dass die Vorrichtung mit einseitiger Zuführung der Beiz- und/oder Spülflüssigkeit 11 aus einem äußeren Düsenrohr 16 mit darin integrierten Spritzdüsen 14 und einem inneren Zuführungsrohr 17 besteht, siehe die Fig. 2 der Zeichnung. Der Hauptteil des einseitig zugeführten Mediums strömt dabei verlustfrei durch das innere Zuführungsrohr bis zur letzten Düsenöffnung. Am Ende des Zuführungsrohres 17 tritt das Medium aus und es ergibt sich eine gleichmäßige Strömungsverteilung über der Bandbreite des Behandlungsguts.It is therefore provided in the device 10 according to the invention that the device with one-sided supply of pickling and / or rinsing liquid 11 from an outer nozzle tube 16 with integrated therein spray nozzles 14 and an inner feed pipe 17, see the Fig. 2 the drawing. The main part of the unilaterally supplied medium flows lossless through the inner feed pipe to the last nozzle opening. At the end of the feed tube 17, the medium emerges and there is a uniform flow distribution over the bandwidth of the material to be treated.

In bevorzugter Ausgestaltung der Erfindung ist vorgesehen, dass die Querschnittsfläche des äußeren Düsenrohres 16 zwischen 2,5 bis 3,5 mal der Querschnittsfläche des inneren Zuführungsrohres 17 entspricht.In a preferred embodiment of the invention, it is provided that the cross-sectional area of the outer nozzle tube 16 corresponds to between 2.5 and 3.5 times the cross-sectional area of the inner feed tube 17.

Unter Verwendung der erfindungsgemäßen Vorrichtung werden Verschlammung und ruhende Flüssigkeitsbereiche im Düsenrohr 15 durch die Vergleichmäßigung der Eindüsung vermieden. Messungen haben dabei eine symmetrisch zur Mitte angeordnete Strömung durch Verwendung des Innenrohres 17 ergeben, siehe dazu die Fig. 3 der Zeichnung mit einer schematischen Darstellung der Strömungsverteilung der erfindungsgemäßen Vorrichtung (Kurve II) im Vergleich zum Stand der Technik (Kurve I).Using the device according to the invention silting and dormant fluid areas in the nozzle tube 15 are avoided by the equalization of the injection. Measurements have shown a symmetrically arranged to the center flow through the use of the inner tube 17, see to the Fig. 3 the drawing with a schematic representation of the flow distribution of the device according to the invention (curve II) compared to the prior art (curve I).

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Vorrichtung zum Aufspritzen von Beiz- und/oder SpülflüssigkeitDevice for spraying pickling and / or rinsing liquid
1111
Beiz- und/oder SpülflüssigkeitPickling and / or rinsing liquid
1212
Behandlungsguttreated
1313
Oberfläche (von 12)Surface (from 12)
1414
Spritzdüsenozzle
1515
Düsenrohrnozzle tube
1616
äußeres Düsenrohrouter nozzle tube
1717
inneres Zuführungsrohrinner feed tube

Claims (6)

  1. Device (10) for the spraying of pickling and/or rinsing liquid (11) onto a metallic stock (12) to be treated, particularly steel strip or metal strip, with a nozzle pipe (15), in the wall of which spray nozzles (11) directed towards the stock to be treated are integrated, wherein the nozzle pipe has a closed end and an open end, the latter being for the feed of pickling and/or rinsing liquid (11) into the nozzle pipe (15), characterised by a feed pipe (17) which is so arranged in the interior of the nozzle pipe in the region of the spray nozzles that one of the two open ends of the feed pipe is disposed opposite the closed end of the nozzle pipe at a spacing.
  2. Device according to claim 1, characterised in that the cross-sectional area of the outer nozzle pipe (16) corresponds with between 2.5 and 3.5 times the cross-sectional area of the inner feed pipe (17).
  3. Device according to claim 1 or 2, characterised in that the length of the inner feed pipe (17) ends at least in front of the last spray nozzle (14) of the outer nozzle pipe (16).
  4. Device according to any one of the preceding claims, characterised in that the inner feed pipe is arranged coaxially with the nozzle pipe in the interior thereof.
  5. Device according to any one of the preceding claims, characterised in that the feed pipe is supported relative to the nozzle pipe in the interior of the nozzle pipe merely at points, for example by individual radial webs, so that the pickling and/or rinsing liquid can be distributed and propagate in an entire intermediate space between the outer side of the feed pipe and the inner side of the nozzle pipe.
  6. Method of operating a device according to any one of the preceding claims 1 to 5, characterised in that the pickling and/or rinsing liquid is introduced under pressure into the open end of the nozzle pipe and simultaneously into the open end, which is remote from the closed end of the nozzle pipe, of the inner feed pipe; that the proportion of pickling and/or rinsing liquid introduced into the inner feed pipe flows almost without loss of pressure through the feed pipe in order to then exit from the other open end of the feed pipe, impact against the spaced, closed end of the nozzle pipe and swirl around in the region between the closed end of the nozzle pipe and the facing, other open end of the feed pipe and possibly also in an intermediate space between the inner feed pipe and the nozzle pipe; and that the pickling and/or rinsing liquid, which is under pressure, is sprayed into the intermediate space by way of the spray nozzles outwardly of the nozzle pipe onto the stock to be treated.
EP09009126.5A 2008-07-12 2009-07-13 Device and method for spraying pickling and/or washing liquid onto a metallic band Active EP2145981B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008032933A DE102008032933A1 (en) 2008-07-12 2008-07-12 Apparatus and method for spraying pickling and / or rinsing liquid on a metallic material to be treated

Publications (3)

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EP2145981A2 EP2145981A2 (en) 2010-01-20
EP2145981A3 EP2145981A3 (en) 2014-04-02
EP2145981B1 true EP2145981B1 (en) 2015-06-10

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DE (1) DE102008032933A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104670A1 (en) * 2013-05-07 2014-11-13 Amazonen-Werke H. Dreyer Gmbh & Co. Kg Liquid line with associated nozzle body
DE102013104667A1 (en) * 2013-05-07 2014-11-27 Amazonen-Werke H. Dreyer Gmbh & Co. Kg Liquid line with associated nozzle body
CN111617893A (en) * 2019-02-27 2020-09-04 湖南迪宏物联科技有限公司 Rotatory nozzle subassembly, rotatory nozzle and spraying system
CN110592653B (en) * 2019-09-03 2024-02-02 昆山东威科技股份有限公司 Transverse spraying structure and electrolytic etching device applied by same
CN110965068B (en) * 2019-11-11 2020-12-08 北京科技大学 Acid tank acid outlet structure for uniform acid washing of wide titanium belt

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627957A1 (en) * 1976-06-22 1978-01-05 Hammelmann Paul Maschf Water spray pipe with spare jet holes covered by plastic sleeve - which is moved to uncover fresh holes when replacement jets are needed
BE1003788A5 (en) * 1989-03-06 1992-06-16 Cockerill Sambre Sa Descaling machine
DE10003847A1 (en) 2000-01-31 2001-08-02 Sms Demag Ag Device for spraying pickling or rinsing liquid onto a metal item to be treated
DE10021789A1 (en) 2000-05-10 2001-11-15 Sms Demag Ag System for the surface treatment of a metal strand, in particular for pickling a steel strip

Also Published As

Publication number Publication date
DE102008032933A1 (en) 2010-01-14
EP2145981A2 (en) 2010-01-20
EP2145981A3 (en) 2014-04-02

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