WO2012163334A1 - Procédé et système de production d'une bande métallique revêtue - Google Patents

Procédé et système de production d'une bande métallique revêtue Download PDF

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Publication number
WO2012163334A1
WO2012163334A1 PCT/DE2012/000568 DE2012000568W WO2012163334A1 WO 2012163334 A1 WO2012163334 A1 WO 2012163334A1 DE 2012000568 W DE2012000568 W DE 2012000568W WO 2012163334 A1 WO2012163334 A1 WO 2012163334A1
Authority
WO
WIPO (PCT)
Prior art keywords
process air
air
drying
temperature
coating
Prior art date
Application number
PCT/DE2012/000568
Other languages
German (de)
English (en)
Inventor
Rainer Gaus
Shuji Yamada
Original Assignee
Thermprotec Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thermprotec Gmbh filed Critical Thermprotec Gmbh
Publication of WO2012163334A1 publication Critical patent/WO2012163334A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005—Treatment of dryer exhaust gases
    • F26B25/006—Separating volatiles, e.g. recovering solvents from dryer exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy

Definitions

  • the invention relates to a method for producing a coated
  • Metal strip in particular steel strip, comprising the step of drying a solvent-containing coating with adjustable process air supply, the drying being carried out by means of a low-temperature drying method, such as NIR irradiation and / or induction heating. It further relates to an arrangement for carrying out this method.
  • a low-temperature drying method such as NIR irradiation and / or induction heating.
  • Coating thickness is usually between 5 ⁇ and 25 ⁇ .
  • Coating is carried out i.d.R. at high web speeds of up to 220 m / min and accordingly, large amounts of solvents are released during drying.
  • Crosslinking of the coating systems requires crosslinking temperatures between 190 ° C and 250 ° C, and even more in special applications.
  • solvents are conventionally removed with hot-air dryers and removed as so-called process air.
  • concentration of the solvents in the exhaust air is strictly limited in accordance with the solvent regulation and amounts to a maximum of 25% by volume.
  • the drying systems are in several zones divided, some of which are operated with very high circulating air temperatures up to 700 ° C.
  • the thermal combustion enthalpy contained in the solvent is sufficient to completely destroy the solvents.
  • the waste heat can also be used for the process. Nevertheless, the expensive and precious solvents are only burned here.
  • the cost of the solvents significantly determines the cost of the entire coating and is many times higher than the pure energy cost of operating a metal strip coating line.
  • the invention is based on the object, an improved method of the generic type and an arrangement for its implementation
  • the solvent concentration in the process air which can be set for the process, enables targeted condensation of the solvents (such as isobutanol, xylenes, xyclohexanones, isophorones, toluene, etc.) from the process air.
  • the one for this High-temperature condensers that can be used are particularly well suited for the efficient recovery of solvents and, if optimally designed, also for the simultaneous separation of the solvents.
  • An important aspect here is that the residual content of the solvent in the process air falls below the permissible exhaust air concentration.
  • this purified air is added back to the process air and thus added to a closed circuit.
  • Cryogenic condensation systems can be used.
  • the process air temperature is less than 400 ° C, preferably less than 300 ° C and preferably less than 260 ° C.
  • the condensation process is carried out as a high-temperature condensation process, in which a first process stage at substantially 100 ° C and a second process stage proceeds at substantially 50 ° C and thereby at least a partial separation of solvents.
  • the condensation process is designed as a cold condensation process with active nitrogen cooling.
  • the solvents contained in the coating are isobutanol, xylenes, xyclohexanones, isophorones, toluene or other organic compounds.
  • Low-temperature drying process with NIR irradiation of the coated metal strip is performed and the process air initially sweeps around the NIR emitters and there is primarily heated and then used as process air.
  • the solvent recovery system comprises a process air preheating station, which is in particular gas or electrically heated.
  • Drying arrangement 23 in a drying tunnel 1 by means of NIR / IR radiation or by induction and from a combination of the two methods.
  • the drying of the paint and the heating of the sheet takes place in both methods without the process air. This serves only to remove the solvents.
  • the process air temperature is brought to the desired temperature before being introduced and is max. 250 ° C warm.
  • the radiation of the IR emitters as well as the induction does not heat the process air directly.
  • the metal strip also reaches a maximum of the predetermined temperature. That the maximum temperature in the oven is limited to 260 ° C and there is no decomposition of the solvents.
  • the process air is then fed to the solvent recovery system.
  • the solvent is removed from the process air by condensation and this collected.
  • This system usually consists of condensers 6, 7, cooling towers 3, 4 and a heat exchanger 11.
  • the purified process air can anschmanend either be blown off via a chimney 15 or the process at 17, 18 are fed back.
  • the air can be supplied directly to the process space in a preheating station 10 operated by gas or electricity as preheated process air 20.
  • a preheating station 10 operated by gas or electricity as preheated process air 20.
  • the process air can be used for emitter cooling and fed to the process after further heating. This will further improve the energy balance.
  • the final temperature control of the process air takes place in the heated preheating station 10.
  • the invention has, at least in appropriate embodiments, incidentally, the following aspects:
  • Low-temperature drying method such as e.g. NIR or induction technology with adjustable process air method and subsequent recovery of the solvents by a condensation process, wherein the maximum process air or dryer air temperature by the use of a low temperature
  • Drying process e.g. NIR / IR, induction or combinations thereof, below the flash point of the solvents used.
  • a passive segment is used in the middle of the drying tunnel to extend the drying time.
  • the metal belt transport through the dryer is horizontal.
  • the process air temperature is less than 400 "C, preferably less than 300" C, and preferably less than 260 "C.
  • a high-temperature condensation process is used in which process stage 1 is carried out at about 100 ° C. and process stage 2 is carried out at about 50 ° C., which results in at least partial separation of the solvents.
  • the solvents used are isobutanol, xylenes, xyclohexanones, isophorones, toluene or other organic compounds
  • the purified process air is wholly or partially mixed back into the new process air.
  • This air is supplied preheated after the emitter cooling process air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Textile Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Abstract

L'invention concerne un procédé de production d'une bande métallique revêtue, en particulier d'une bande d'acier, qui comprend une étape consistant à faire sécher un revêtement contenant des solvants par apport réglable d'air de traitement, le séchage s'effectuant à l'aide d'un procédé de séchage à basse température, comme une exposition à un rayonnement infrarouge proche et/ou un chauffage par induction, la température maximale de l'air de traitement étant inférieure à la température de décomposition de chacun des solvants contenus dans le revêtement, et les solvants contenus dans le revêtement étant récupérés à l'aide d'un procédé de condensation.
PCT/DE2012/000568 2011-05-27 2012-05-29 Procédé et système de production d'une bande métallique revêtue WO2012163334A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110102608 DE102011102608A1 (de) 2011-05-27 2011-05-27 Verfahren und Vorrichtung zur Lösemittelrückgewinnung bei der Metallbandbeschichtung
DE102011102608.1 2011-05-27

Publications (1)

Publication Number Publication Date
WO2012163334A1 true WO2012163334A1 (fr) 2012-12-06

Family

ID=46545204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2012/000568 WO2012163334A1 (fr) 2011-05-27 2012-05-29 Procédé et système de production d'une bande métallique revêtue

Country Status (2)

Country Link
DE (1) DE102011102608A1 (fr)
WO (1) WO2012163334A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108332514A (zh) * 2017-12-29 2018-07-27 中国电子科技集团公司第十二研究所 一种微波干燥系统
CN112902570A (zh) * 2021-01-22 2021-06-04 机械工业第九设计研究院有限公司 一种烘干炉智能节能减排系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113578702A (zh) * 2021-07-06 2021-11-02 上海巴洛特新材料研究有限公司 一种涂层加工流水线红外烘干装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1515648A (fr) * 1965-04-21 1968-03-01 Diamond Alkali Co Procédé de fabrication de matériaux composite
GB1591055A (en) * 1977-09-06 1981-06-10 Sav Sol Drying Systems Inc Method and apparatus for removing solvent from a web of maaterial
US4370357A (en) * 1981-03-11 1983-01-25 Cleveland Gear Company Process of continuous metal coating
EP0132248A2 (fr) * 1983-07-14 1985-01-23 COCKERILL SAMBRE Société Anonyme dite: Procédé et installation de cuisson d'un revêtement organique appliqué sur un support
US4982512A (en) * 1989-12-11 1991-01-08 Jvc Magnetics America Co. Vapor recovery system
EP0744222A1 (fr) * 1995-05-23 1996-11-27 Stein Heurtey Procédé et dispositif de revêtement de bandes métalliques
EP1413841A1 (fr) * 2002-10-25 2004-04-28 Myriad Procédé de séchage d'un revêtement de bande métallique
US20080206455A1 (en) * 2006-09-25 2008-08-28 Fujifilm Corporation Method and apparatus for drying coating film and method for producing optical film

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1515648A (fr) * 1965-04-21 1968-03-01 Diamond Alkali Co Procédé de fabrication de matériaux composite
GB1591055A (en) * 1977-09-06 1981-06-10 Sav Sol Drying Systems Inc Method and apparatus for removing solvent from a web of maaterial
US4370357A (en) * 1981-03-11 1983-01-25 Cleveland Gear Company Process of continuous metal coating
EP0132248A2 (fr) * 1983-07-14 1985-01-23 COCKERILL SAMBRE Société Anonyme dite: Procédé et installation de cuisson d'un revêtement organique appliqué sur un support
US4982512A (en) * 1989-12-11 1991-01-08 Jvc Magnetics America Co. Vapor recovery system
EP0744222A1 (fr) * 1995-05-23 1996-11-27 Stein Heurtey Procédé et dispositif de revêtement de bandes métalliques
EP1413841A1 (fr) * 2002-10-25 2004-04-28 Myriad Procédé de séchage d'un revêtement de bande métallique
US20080206455A1 (en) * 2006-09-25 2008-08-28 Fujifilm Corporation Method and apparatus for drying coating film and method for producing optical film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108332514A (zh) * 2017-12-29 2018-07-27 中国电子科技集团公司第十二研究所 一种微波干燥系统
CN112902570A (zh) * 2021-01-22 2021-06-04 机械工业第九设计研究院有限公司 一种烘干炉智能节能减排系统

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Publication number Publication date
DE102011102608A1 (de) 2012-11-29

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