EP1136594A2 - Apparatus and method for operating a multistage countercurrent cascade cleaning-system - Google Patents

Apparatus and method for operating a multistage countercurrent cascade cleaning-system Download PDF

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Publication number
EP1136594A2
EP1136594A2 EP01106995A EP01106995A EP1136594A2 EP 1136594 A2 EP1136594 A2 EP 1136594A2 EP 01106995 A EP01106995 A EP 01106995A EP 01106995 A EP01106995 A EP 01106995A EP 1136594 A2 EP1136594 A2 EP 1136594A2
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EP
European Patent Office
Prior art keywords
rinsing
stage
rinse
water circulation
operating
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.)
Withdrawn
Application number
EP01106995A
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German (de)
French (fr)
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EP1136594A3 (en
Inventor
Dirk Dipl.-Ing. Holthaus
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SMS Siemag AG
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SMS Demag AG
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Publication of EP1136594A2 publication Critical patent/EP1136594A2/en
Publication of EP1136594A3 publication Critical patent/EP1136594A3/en
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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
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/16—Regeneration of process solutions
    • C25D21/20—Regeneration of process solutions of rinse-solutions
    • 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
    • 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
    • C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
    • C23G3/029—Associated apparatus, e.g. for pretreating or after-treating for removing the pickling fluid from the objects
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/08—Rinsing

Definitions

  • the invention relates to a method and a device for operating a multi-stage Countercurrent cascade sink for wet chemical surface treatment the process part or a post-treatment part a system for treatment Metallic belts is connected downstream and at each rinse level a connection to a central fresh water volume supply a rinsing water circulation system having.
  • Such a rinsing process is in the wet chemical surface treatment of great importance. It not only breaks the previous chemical reaction ab, but also achieves a cleaning of the surface of the goods and thus avoids the carry-over of foreign electrolytes into the subsequent process bath.
  • Such Countercurrent cascade rinses are usually the process parts of belt treatment plants, such as strip pickling, downstream, are used but also for rinsing processes in other conveyor systems after cleaning parts, after Treatment parts or post-treatments.
  • the continuous one The belt is cleaned of treatment chemicals and foreign substance residues.
  • the fresh water supplied via a central supply arrangement is in the abandoned in the direction of the last belt and runs in counterflow to the material flow over the individual rinsing stages from separating weirs to the first Rinse level.
  • the fresh water volume flow (cascade flow) is usually dependent regulated by surface throughput, with a minimum cascade flow to Operation of the sink is always required.
  • the rinsing on the surface adhering liquid film diluted with water. So the flushing is over the better the dilution ratio, also known as the rinsing criterion is that of the concentration in the process bath and the concentration in the last rinse is determined, which ultimately for the purity of the treated Parts or tapes is important.
  • the invention has for its object a method and an apparatus to create an improved flushing technology with higher Allow degree of cleaning or greater purity of the items to be treated.
  • This object is achieved with a method according to the invention in that a partial flow from the flushing water circulation system associated with each flushing stage branched off as a bypass stream and the previous rinsing stage is fed.
  • a partial flow from the flushing water circulation system associated with each flushing stage branched off as a bypass stream and the previous rinsing stage is fed.
  • the invention in the flushing water circulation system assigned to each flushing stage separate bypass lines integrated, each at the end of the each previous rinse stage open into this, preferably with on The end of the bypass line is arranged above and below the belt Nozzle pipes.
  • a countercurrent cascade sink 1 shown in the exemplary embodiment, which a treatment part 2, e.g. a stain, for the treatment of a tape running according to arrow 3 continuous metallic band 4 connects, consists of a pre-sink 5 and the subsequent rinsing n as well n + 1, n + 2 and n + 3.
  • the countercurrent cascade sink 1 is the fresh water from a supply source, not shown, via a fresh water volume supply 6 abandoned in the last sink or rinse level n + 3.
  • the single ones Flushing or flushing levels 5 or n to n + 3 are by weirs 7 (see also Fig. 2) separated from each other.
  • Each rinse level n and n + 1 to n + 3 inclusive the sink 5 is assigned a rinsing water circulation system I to IV, via which the individual rinse levels are supplied with the necessary rinse water, which is given up via nozzle arrangements 9, each of which is an upper and have 4 nozzle tube running below the belt.
  • the belt 4 thus experiences an additional one in each of the previous rinsing stages Cleaning with the less loaded rinse water of the following rinse level n + 1 or n + 2 or n + 3.
  • the one always required to operate the countercurrent cascade sink 1 minimal cascade current is thus without an overflow of weirs 7 and thus a carryover of chemicals or foreign substance residues from the maintain the last one to the penultimate sink.

Abstract

Operating a counter stream cascade coil comprises deviating a partial stream as a bypass stream from the rinsing water circulating system belonging to each rinsing step; and introducing the each rinsing step. Preferred Features: The deviated partial stream is divided at the end of each previous rinsing step, and introducing above and also below the strip.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Betrieb einer mehrstufigen Gegenstromkaskadenspüle, die zur naßchemischen Oberflächenbehandlung dem Prozeßteil oder einem Nachbehandlungsteil eine Anlage zum Behandeln metallischer Bänder nachgeschaltet ist und bei der jede Spülstufe neben einem Anschluß an eine zentrale Frischwasservolumen-Zuführung ein Spülwasser-Kreislaufsystem aufweist.The invention relates to a method and a device for operating a multi-stage Countercurrent cascade sink for wet chemical surface treatment the process part or a post-treatment part a system for treatment Metallic belts is connected downstream and at each rinse level a connection to a central fresh water volume supply a rinsing water circulation system having.

Ein solcher Spülprozeß ist bei der naßchemischen Oberflächenbehandlung von großer Bedeutung. Er bricht nicht nur die vorausgegangene chemische Reaktion ab, sondern erzielt auch eine Reinigung der Warenoberfläche und vermeidet so die Verschleppung von Fremdelektrolyten in das nachfolgende Prozeßbad. Derartige Gegenstromkaskadenspülen sind üblicherweise den Prozeßteilen von Bandbehandlungsanlagen, wie Bandbeizen, nachgeschaltet, finden ihre Anwendung aber auch für Spülprozesse in anderen Bandanlagen nach Reinigungsteilen, nach Behandlungsteilen oder auch Nachbehandlungen. Das kontinuierlich durchlaufende Band wird dabei von Behandlungschemikalien bzw. Fremdstoffresten gereinigt. Das über eine zentrale Zuleitungsanordnung zugeführte Frischwasser wird in der in Bandlaufrichtung letzten Spüle aufgegeben und läuft im Gegenstrom zum Materialfluß über die einzelnen Spülstufen von einander trennenden Wehre zur ersten Spülstufe. Such a rinsing process is in the wet chemical surface treatment of great importance. It not only breaks the previous chemical reaction ab, but also achieves a cleaning of the surface of the goods and thus avoids the carry-over of foreign electrolytes into the subsequent process bath. Such Countercurrent cascade rinses are usually the process parts of belt treatment plants, such as strip pickling, downstream, are used but also for rinsing processes in other conveyor systems after cleaning parts, after Treatment parts or post-treatments. The continuous one The belt is cleaned of treatment chemicals and foreign substance residues. The fresh water supplied via a central supply arrangement is in the abandoned in the direction of the last belt and runs in counterflow to the material flow over the individual rinsing stages from separating weirs to the first Rinse level.

Der Frischwasservolumenstrom (Kaskadenstrom) wird üblicherweise in Abhängigkeit vom Oberflächendurchsatz geregelt, wobei ein minimaler Kaskadenstrom zum Betrieb der Spüle immer erforderlich ist. Durch die Spülung wird der an der Oberfläche anhaftende Flüssigkeitsfilm mit Wasser verdünnt. Die Spülung wird also um so besser sein, je höher das auch als Spülkriterium bezeichnete Verdünnungsverhältnis ist, das von der Konzentration im Prozeßbad und der Konzentration im letzten Spülbad bestimmt wird, was letztendlich für die Reinheit der behandelten Teile bzw. Bänder von Bedeutung ist.The fresh water volume flow (cascade flow) is usually dependent regulated by surface throughput, with a minimum cascade flow to Operation of the sink is always required. The rinsing on the surface adhering liquid film diluted with water. So the flushing is over the better the dilution ratio, also known as the rinsing criterion is that of the concentration in the process bath and the concentration in the last rinse is determined, which ultimately for the purity of the treated Parts or tapes is important.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs genannten Art zu schaffen, die eine verbesserte Spültechnik mit höherem Reinigungsgrad bzw. größerer Reinheit des Behandlungsguts erlauben.The invention has for its object a method and an apparatus to create an improved flushing technology with higher Allow degree of cleaning or greater purity of the items to be treated.

Diese Aufgabe wird mit einem Verfahren erfindungsgemäß dadurch gelöst, daß aus dem einer jeden Spülstufe zugehörigen Spülwasser-Kreislaufsystem ein Teilstrom als Bypass-Strom abgezweigt und der jeweils vorhergehenden Spülstufe zugeführt wird. Durch das Abzweigen des Bypass-Stroms von dem Kreislaufsystem der n+1-Spülstufe und Zuführen dieses Stroms in die vorhergehende, n-Spülstufe läßt sich erreichen, daß das Band bzw. das Behandlungsgut in der n-Spülstufe eine zusätzliche Reinigung mit dem geringer beladenen Spülwasser der n+1-Spülstufe erfährt.This object is achieved with a method according to the invention in that a partial flow from the flushing water circulation system associated with each flushing stage branched off as a bypass stream and the previous rinsing stage is fed. By branching the bypass flow from the circulatory system the n + 1 rinse stage and supply this current to the previous n-rinse stage can be achieved that the belt or the material to be treated in the n-rinse stage an additional cleaning with the less loaded rinse water experiences n + 1 rinse stage.

Die Wirksamkeit der Spülung wird weiterhin erhöht, wenn nach einem Vorschlag der Erfindung der abgezweigte Teilstrom am Ende der jeweils vorhergehenden Spülstufe aufgeteilt und sowohl ober- als auch unterhalb des Bandes zugeführt wird. Das Band bzw. Behandlungsgut wird damit umfassend gereinigt.The effectiveness of the rinse is further increased if following a suggestion the invention of the branched partial stream at the end of the previous one Rinse stage divided and fed both above and below the belt becomes. The belt or material to be treated is thus cleaned thoroughly.

Bei einer zum Durchführen des Verfahrens geeigneten Vorrichtung sind erfindungsgemäß in das einer jeden Spülstufe zugeordnete Spülwasser-Kreislaufsystem separate Bypass-Leitungen integriert, die jeweils am Ende der jeweiligen vorhergehenden Spülstufe in diese münden, vorzugsweise mit am Mündungsende der Bypass-Leitung ober- und unterhalb des Bandes angeordneten Düsenrohren. Durch die Aufrechterhaltung des minimalen Kaskadenstroms zum Betrieb der Spüle über einen Bypass-Strom aus der jeweils folgenden Spülstufe zum Ende der vorhergehenden Spülstufe lassen sich mehrere Vorteile erreichen, nämlich bei gleicher Anzahl an Spülstufen eine Reduzierung des Frischwasserverbrauchs bzw. bei gleicher Anzahl an Spülstufen und Frischwasserverbrauch ein höherer Oberflächendurchsatz. Hingegen stellt sich bei gleicher Anzahl Spülstufen und bei gleichem Oberflächendurchsatz eine Verringerung des Frischwasserverbrauchs ein. Schließlich werden durch den Spülprozeß ansonsten entstehende Anlagenstillstände und damit die Bandlänge mit Oberflächenfehlern (Hydroxidbildung) reduziert.In a device suitable for performing the method, the invention in the flushing water circulation system assigned to each flushing stage separate bypass lines integrated, each at the end of the each previous rinse stage open into this, preferably with on The end of the bypass line is arranged above and below the belt Nozzle pipes. By maintaining the minimum cascade current for operating the sink via a bypass flow from the following rinsing stage at the end of the previous rinsing stage, there are several advantages, namely with the same number of rinsing stages, a reduction in fresh water consumption or with the same number of rinse levels and fresh water consumption a higher surface throughput. In contrast, with the same number of rinse levels and a reduction in fresh water consumption for the same surface throughput on. Finally, otherwise arise through the rinsing process Plant downtimes and thus the strip length with surface defects (hydroxide formation) reduced.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung eines in den Zeichnungen dargestellten Ausführungsbeispiels der Erfindung. Es zeigen:

Figur 1
ein Anlagenschema einer einem Band-Behandlungsteil nachgeschalteten Gegenstromkaskadenspüle mit Spülwasser-Versorgungsanschlüssen; und
Figur 2
in vereinfachter und gegenüber Fig. 1 vergrößerter Darstellung den dem Behandlungsteil folgenden einlaufseitigen Abschnitt der Gegenstromkaskadenspüle.
Further details and advantages of the invention result from the claims and the following description of an embodiment of the invention shown in the drawings. Show it:
Figure 1
a system diagram of a downstream of a belt treatment section countercurrent cascade with rinse water supply connections; and
Figure 2
in a simplified and enlarged representation compared to FIG. 1, the inlet-side section of the countercurrent cascade sink following the treatment part.

Eine im Ausführungsbeispiel dargestellte Gegenstromkaskadenspüle 1, die sich einem Behandlungsteil 2, z.B. eine Beize, zur Behandlung eines in Bandlaufrichtung gemäß Pfeil 3 kontinuierlich durchlaufenden metallischen Bandes 4 anschließt, besteht aus einer Vorspüle 5 und den darauffolgenden Spülen n sowie n+1, n+2 und n+3. Der Gegenstromkaskadenspüle 1 wird das Frischwasser von einer nicht dargestellten Versorgungsquelle über eine Frischwasser-Volumenzuführung 6 in der letzten Spüle bzw. Spülstufe n+3 aufgegeben. Die einzelnen Spülen bzw. Spülstufen 5 bzw. n bis n+3 sind durch Wehre 7 (vgl. auch Fig. 2) voneinander getrennt. Einer jeden Spülstufe n sowie n+1 bis n+3 einschließlich der Spüle 5 ist ein Spülwasser-Kreislaufsystem I bis IV zugeordnet, über das die einzelnen Spülstufen mit dem benötigten Spülwasser versorgt werden, das über Düsenanordnungen 9 aufgegeben wird, die jeweils ein ober- und unterhalb des Bandes 4 verlaufendes Düsenrohr aufweisen.A countercurrent cascade sink 1 shown in the exemplary embodiment, which a treatment part 2, e.g. a stain, for the treatment of a tape running according to arrow 3 continuous metallic band 4 connects, consists of a pre-sink 5 and the subsequent rinsing n as well n + 1, n + 2 and n + 3. The countercurrent cascade sink 1 is the fresh water from a supply source, not shown, via a fresh water volume supply 6 abandoned in the last sink or rinse level n + 3. The single ones Flushing or flushing levels 5 or n to n + 3 are by weirs 7 (see also Fig. 2) separated from each other. Each rinse level n and n + 1 to n + 3 inclusive the sink 5 is assigned a rinsing water circulation system I to IV, via which the individual rinse levels are supplied with the necessary rinse water, which is given up via nozzle arrangements 9, each of which is an upper and have 4 nozzle tube running below the belt.

Die Aufrechterhaltung des Kaskadenstroms in durch in Fig. 2 durch Pfeile 8 verdeutlichter Gegenstromrichtung zum Materialfluß erfolgt nicht mehr durch Überlauf über die Wehre 7, sondern vielmehr durch Abzweigen eines Bypass-Stroms aus dem jeweiligen Spülwasser-Kreislaufsystemen I bis IV. Zu diesem Zweck ist in jedem Spülwasser-Kreislaufsystem I bis IV eine separate Bypass-Leitung 10 integriert, mittels der ein Teilstrom abgezweigt und aus der in Bandlaufrichtung folgenden Spülstufe jeweils dem Ende der vorhergehenden Spülstufe, d.h. bspw. aus der Spülstufe n+1 zur Spülstufe n, zurückgeführt wird. Die Mündungsenden der Bypass-Leitungen sind mit Düsenanordnungen 11 ausgebildet, die ober- und unterhalb des Bandes 4 ein Düsenrohr 11a, 11b (vgl. Fig. 2, die gegenüber Fig. 1 die Spülstufenanordnung allerdings spiegelverkehrt zeigt) besitzen.The maintenance of the cascade flow is illustrated by arrows 8 in FIG. 2 Counterflow direction to the material flow is no longer caused by overflow over the weirs 7, but rather by branching off a bypass stream the respective rinsing water circulation systems I to IV. For this purpose in a separate bypass line 10 is integrated into each rinsing water circulation system I to IV, by means of which a partial flow is branched off and from the following in the direction of strip travel Rinse step at the end of the previous rinse step, i.e. e.g. from rinse level n + 1 to rinse level n. The muzzle ends the bypass lines are formed with nozzle arrangements 11, the top and below the belt 4, a nozzle tube 11a, 11b (cf. FIG. 2, which is compared to FIG. 1 the flush stage arrangement, however, shows mirrored).

Das Band 4 erfährt damit in jeder der vorhergehenden Spülstufen eine zusätzliche Reinigung mit dem geringer beladenen Spülwasser der folgenden Spülstufe n+1 bzw. n+2 bzw. n+3. Der zum Betrieb der Gegenstromkaskadenspüle 1 immer erforderliche minimale Kaskadenstrom wird somit ohne einen Überlauf der Wehre 7 und damit einer Verschleppung der Chemikalien bzw. Fremdstoffreste von der letzten zur vorletzten Spüle aufrechterhalten.The belt 4 thus experiences an additional one in each of the previous rinsing stages Cleaning with the less loaded rinse water of the following rinse level n + 1 or n + 2 or n + 3. The one always required to operate the countercurrent cascade sink 1 minimal cascade current is thus without an overflow of weirs 7 and thus a carryover of chemicals or foreign substance residues from the maintain the last one to the penultimate sink.

Claims (4)

Verfahren zum Betrieb einer Gegenstromkaskadenspüle, die zur naßchemischen Oberflächenbehandlung dem Prozeßteil oder einem Nachbehandlungsteil einer Anlage zum Behandeln metallischer Bänder nachgeschaltet ist und bei der jede Spülstufe neben einem Anschluß an eine zentrale Frischwasservolumen-Zuführung ein Spülwasser-Kreislaufsystem aufweist,
dadurch gekennzeichnet, daß aus dem einer jeden Spülstufe zugehörigen Spülwasser-Kreislaufsystem ein Teilstrom als Bypass-Strom abgezweigt und der jeweils vorhergehenden Spülstufe zugeführt wird.Method for operating a countercurrent cascade sink, which is connected downstream of the process part or a post-treatment part of a system for treating metallic strips for wet chemical surface treatment and in which each flushing stage has a flushing water circulation system in addition to a connection to a central fresh water volume supply,
characterized in that a partial stream is branched off as a bypass stream from the rinsing water circulation system associated with each rinsing stage and is fed to the respective previous rinsing stage. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß der abgezweigte Teilstrom am Ende der jeweils vorhergehenden Spülstufe aufgeteilt und sowohl ober- als auch unterhalb des Bandes zugeführt wird.Method according to claim 1,
characterized in that the branched-off partial stream is divided at the end of the previous rinsing stage and fed both above and below the belt. Vorrichtung zum Betrieb einer Gegenstromkaskadenspüle, die zur naßchemischen Oberflächenbehandlung dem Prozeßteil oder einem Nachbehandlungsteil eine Anlage zum Behandeln metallischer Bänder nachgeschaltet ist und bei der jede Spülstufe neben einem Anschluß an die zentrale Frischwasservolumen-Zuführung ein Spülwasser-Kreislaufsystem aufweist, insbesondere zum Durchführen des Verfahrens nach Anspruch 1,
dadurch gekennzeichnet, daß in das einer jeden Spülstufe (n, n+1, n+2, n+3) zugeordnete Spülwasser-Kreislaufsystem (I bis IV) separate Bypass-Leitungen (10) integriert sind, die jeweils am Ende der jeweiligen vorhergehenden Spülstufe (n, n+1, n+2) in diese münden.Device for operating a countercurrent cascade sink, a system for treating metallic strips is connected downstream of the process part or a post-treatment part for wet chemical surface treatment and in which each rinsing stage has a rinsing water circulation system in addition to a connection to the central fresh water volume supply, in particular for carrying out the method according to claim 1,
characterized in that separate bypass lines (10) are integrated in the rinsing water circulation system (I to IV) associated with each rinsing stage (n, n + 1, n + 2, n + 3), each at the end of the preceding one Rinse stage (n, n + 1, n + 2) lead into this. Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß das Mündungsende der Bypass-Leitungen (10) mit ober- und unterhalb des Bandes (4) angeordneten Düsenrohren (11a, 11b) ausgebildet ist.Device according to claim 3,
characterized in that the mouth end of the bypass lines (10) is formed with nozzle pipes (11a, 11b) arranged above and below the band (4).
EP01106995A 2000-03-24 2001-03-21 Apparatus and method for operating a multistage countercurrent cascade rinsing tank Withdrawn EP1136594A3 (en)

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Application Number Priority Date Filing Date Title
DE10014710A DE10014710A1 (en) 2000-03-24 2000-03-24 Method and device for operating a multi-stage countercurrent cascade sink
DE10014710 2000-03-24

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EP1136594A2 true EP1136594A2 (en) 2001-09-26
EP1136594A3 EP1136594A3 (en) 2004-01-02

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KR (1) KR20010093050A (en)
CN (1) CN1230573C (en)
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CN103806010B (en) * 2014-01-22 2016-09-14 镇江市宏业科技有限公司 The energy saving and environment friendly chemically-cleaning device of stretch bending-straightening machine
CN104550091B (en) * 2014-12-31 2017-04-19 东莞市华荣涂装设备有限公司 Water circulation system and circulation method for spray treatment before coating
CN109594081A (en) * 2018-12-11 2019-04-09 查仁庆 A method of metal works are cleaned using recirculated water
CN113061899B (en) * 2021-03-25 2022-11-15 本钢板材股份有限公司 Rinsing system and rinsing method for cold-rolled strip steel acid pickling
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WO2020207644A1 (en) 2019-04-09 2020-10-15 Sms Group Gmbh Cascade-type rinsing plant for treating a flat product in the form of a strip

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US6749692B2 (en) 2004-06-15
DE10014710A1 (en) 2001-09-27
BR0101147A (en) 2001-10-30
US20010039957A1 (en) 2001-11-15
CN1334359A (en) 2002-02-06
CA2341575A1 (en) 2001-09-24
JP2001293513A (en) 2001-10-23
EP1136594A3 (en) 2004-01-02
TW473561B (en) 2002-01-21
RU2260482C2 (en) 2005-09-20
CN1230573C (en) 2005-12-07
KR20010093050A (en) 2001-10-27

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