EP4290163A1 - Trocknungsanlage - Google Patents

Trocknungsanlage Download PDF

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Publication number
EP4290163A1
EP4290163A1 EP23175563.8A EP23175563A EP4290163A1 EP 4290163 A1 EP4290163 A1 EP 4290163A1 EP 23175563 A EP23175563 A EP 23175563A EP 4290163 A1 EP4290163 A1 EP 4290163A1
Authority
EP
European Patent Office
Prior art keywords
installation
catalyst
combustion products
possibly
equal
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.)
Pending
Application number
EP23175563.8A
Other languages
English (en)
French (fr)
Inventor
Kevin Blanchard
Nicolas Even
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.)
Solaronics SAS
Original Assignee
Solaronics SAS
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 Solaronics SAS filed Critical Solaronics SAS
Publication of EP4290163A1 publication Critical patent/EP4290163A1/de
Pending legal-status Critical Current

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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
    • F26B3/305—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements the infrared radiation being generated by combustion or combustion gases
    • 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
    • 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
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
    • 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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F26B23/022—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure
    • F26B23/024—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure by means of catalytic oxidation
    • 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

Definitions

  • the present invention relates to an installation for drying a moving strip material, in particular paper.
  • Continuous heat treatment systems for strip material which combine infrared radiation and convection heating.
  • gas infrared emitters whose hot gas is drawn in by means of suction nozzles and discharged onto the belt by means of blowing nozzles, creating a combined radiation and convection heat treatment system.
  • the document US 6,088,930 discloses a convection and radiation system for the heat treatment of a strip which moves opposite gas infrared radiant elements and elements blowing hot air on this strip.
  • the system comprises a succession of blowing elements separated from each other by at least one gas infrared radiating element.
  • Each blower element includes on each side a suction element extending close to a gas infrared radiator.
  • the document WO 2005/085729 describes a system resulting in reduced mechanical energy consumption and reduced thermal energy loss, reduced capital and operating costs, and requiring less space.
  • This drying installation is characterized by the fact that the suction devices, and possibly blowing devices, of the system mass transfer devices comprise at least one suction, and possibly blowing, device installed opposite the passband with respect to corresponding suction and blowing ducts which extend at least in the transverse direction of the band, and arranged to suck up and/or blow said combustion products so as to optimize the vector averages.
  • the vectors represent the respective trajectories of the different jets of combustion products sucked in and/or blown out.
  • the present invention aims to improve the operation of the installations described above.
  • the present invention aims to provide an installation for drying a moving belt material, which is more environmentally friendly.
  • the present invention aims to provide an installation for drying a moving belt material, having a lower ecological impact.
  • the gas flow circulation system also includes an extraction pipe configured for the evacuation from the installation of at least a portion of the combustion products sucked in by the gas flow circulation system.
  • the installation also comprises a device for treating combustion products, the treatment device comprising an oxidation and/or reduction catalyst, and being mounted on or downstream of said extraction pipe in order to respectively treat the carbon monoxide. carbon and/or nitrogen oxides contained in the combustion products.
  • the treatment device comprising an oxidation and/or reduction catalyst, and being mounted on or downstream of said extraction pipe in order to respectively treat the carbon monoxide. carbon and/or nitrogen oxides contained in the combustion products.
  • the installation is configured to operate the treatment device in its optimal temperature conditions. More specifically, the installation is configured to operate the treatment device at a temperature allowing high efficiency to be obtained, throughout the operation of the installation.
  • the installation is configured to operate the catalyst in its optimal temperature conditions, so as to obtain high efficiency of the oxidation and/or reduction reaction, throughout of the operation of the installation.
  • Heating the catalyst to very high temperatures, in particular 300°C or 400°C, can also make it possible to obtain, at the outlet of the treatment device, the same efficiency but with fewer precious metals in the catalyst than for a device processing operating at a lower temperature.
  • the regulation means comprises a heating element, such as an electrical element and/or a heat exchanger and/or an inductive means, configured to supply heat to the catalyst.
  • a heating element such as an electrical element and/or a heat exchanger and/or an inductive means, configured to supply heat to the catalyst.
  • the electric or inductive heating means for example a heating resistor or a coil, makes it possible to obtain a rapid and controlled rise in the temperature of the catalyst.
  • Such an electric or inductive heating means is particularly suitable during periods of transient operation of the installation, for example at start-up, during which the combustion products to be treated may have a temperature lower than that desired for the operation of the treatment device.
  • the inductive heating means is particularly advantageous for concentrating, by choice of material and/or geometry, the transfer of energy to locations in the catalyst where the thermal energy will be most useful.
  • the heat exchanger can be used to reuse calories available elsewhere, in particular in the installation, to increase the temperature of the catalyst, while limiting the energy consumption, in particular electricity, of the installation.
  • the regulation means comprises control means configured to control the radiating or heating elements, and/or the gas flow circulation system and/or the treatment device, in order to regulate the temperature of the catalyst.
  • the control means can in particular be configured to control valves, valves, etc., in particular in the gas flow circulation system, or even the power supply, power, distribution, etc., of the radiating or heating elements.
  • the regulation means comprises at least one carbon monoxide and/or nitrogen oxides sensor mounted upstream or downstream of the catalyst and configured to respectively measure the quantity of carbon monoxide and/or nitrogen oxides. nitrogen contained in the combustion products upstream and/or downstream of the catalyst.
  • the regulation means may comprise a carbon monoxide sensor, and possibly nitrogen oxides, mounted upstream of the catalyst, and a carbon monoxide sensor, and possibly nitrogen oxides, mounted in downstream of the catalyst.
  • the regulation means is configured to maintain the catalyst at a temperature greater than or equal to 130°C, preferably greater than or equal to 150°C, and more preferably greater than or equal to 200°C, or even 300°C or 400 °C, when the quantity of carbon monoxide and/or nitrogen oxides contained in the combustion products upstream of the catalyst is greater than a defined threshold.
  • the quantity of air in the gases supplying the radiating or heating elements is generally greater than that required by the stoichiometry of the combustion reaction, in order to ensure complete combustion. However, if the quantity of carbon monoxide is low in the combustion products, this indicates that complete combustion has indeed taken place: it is then possible to reduce the quantity of fresh air supplying the radiating or heating elements, provided that the amount of carbon monoxide in combustion products remains low.
  • the regulation means is configured to regulate the temperature and/or the composition of the combustion products entering the catalyst.
  • the regulation means can be configured to heat the combustion products, in particular without modifying their composition. In other words, the combustion products are heated by the regulating means while keeping the same composition.
  • Another possibility of modifying the fresh air content of the combustion products, and therefore the temperature of the combustion products, is the modification of the cooling air used in the installation, in particular near the radiating or heating elements. This amount of cooling air can also be adjusted to obtain the desired temperature for the combustion products entering the catalyst.
  • the catalyst comprises a metallic or ceramic honeycomb support, with at least one portion coated with one or more precious metals and/or with a means of injecting a reducing agent, for example ammonia.
  • a reducing agent for example ammonia.
  • Such supports make it possible to obtain very high active surfaces for a defined volume, which makes it possible to obtain higher yields.
  • the installation also includes a catalyst unclogging device.
  • the catalyst unclogging device is a device for circulating a fluid under pressure, for example compressed air, through the catalyst.
  • FIG. 1 schematically illustrates an example of a drying installation 1 for the continuous drying of a material in a moving belt 2 according to the invention.
  • the strip material 2 moves in the direction indicated by the arrow 4 through the drying installation 1.
  • the gas flow circulation system 8 comprises suction nozzles 10 and an extraction conduit 12 for sucking hot air, or combustion products, at the level of the moving strip material 2.
  • the conduit d The extraction 12 is provided for the evacuation from the drying installation 1 of the combustion products sucked in via a central fan 14 of the drying installation 1 and one, or more, extraction pipes 16.
  • the products combustion can thus be released outside, into the atmosphere, for example through a chimney, but can also, at least in part, be reused in another system.
  • the combustion products leaving the treatment device as described below can be redirected into the drying installation itself, for example to a heat exchanger, or to another installation, for example a dryer. air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Textile Engineering (AREA)
  • Sustainable Development (AREA)
  • Microbiology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Solid Materials (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
EP23175563.8A 2022-06-06 2023-05-26 Trocknungsanlage Pending EP4290163A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2205402A FR3136275B1 (fr) 2022-06-06 2022-06-06 Installation de séchage

Publications (1)

Publication Number Publication Date
EP4290163A1 true EP4290163A1 (de) 2023-12-13

Family

ID=82385377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23175563.8A Pending EP4290163A1 (de) 2022-06-06 2023-05-26 Trocknungsanlage

Country Status (4)

Country Link
US (1) US20230392864A1 (de)
EP (1) EP4290163A1 (de)
CN (1) CN117190655A (de)
FR (1) FR3136275B1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743529A (en) * 1954-07-06 1956-05-01 Oxy Catalyst Inc Drying oven and operation thereof
JPH07204883A (ja) * 1994-01-20 1995-08-08 Tamura Seisakusho Co Ltd はんだ付け雰囲気浄化装置
US6088930A (en) 1997-11-14 2000-07-18 Solaronics Process Sa Convection-radiation system for heat treatment of a continuous strip
US6321462B1 (en) * 1998-05-07 2001-11-27 Megtec Systems, Inc. Web dryer with fully integrated regenerative heat source
WO2005085729A2 (en) 2004-03-02 2005-09-15 Nv Bekaert Sa Drier installation for drying web
JP2009101297A (ja) * 2007-10-23 2009-05-14 Fujimori Kogyo Co Ltd 塗膜の乾燥硬化方法および塗膜乾燥硬化装置
ITMI20082311A1 (it) * 2008-12-23 2010-06-24 Italcementi Spa Apparato migliorato per la produzione di clinker a partire da farina cruda e relativo processo
WO2012073711A1 (ja) * 2010-12-01 2012-06-07 株式会社 エコ・アシスト長崎 低温熱分解方法及び低温熱分解炉

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743529A (en) * 1954-07-06 1956-05-01 Oxy Catalyst Inc Drying oven and operation thereof
JPH07204883A (ja) * 1994-01-20 1995-08-08 Tamura Seisakusho Co Ltd はんだ付け雰囲気浄化装置
US6088930A (en) 1997-11-14 2000-07-18 Solaronics Process Sa Convection-radiation system for heat treatment of a continuous strip
US6321462B1 (en) * 1998-05-07 2001-11-27 Megtec Systems, Inc. Web dryer with fully integrated regenerative heat source
WO2005085729A2 (en) 2004-03-02 2005-09-15 Nv Bekaert Sa Drier installation for drying web
JP2009101297A (ja) * 2007-10-23 2009-05-14 Fujimori Kogyo Co Ltd 塗膜の乾燥硬化方法および塗膜乾燥硬化装置
ITMI20082311A1 (it) * 2008-12-23 2010-06-24 Italcementi Spa Apparato migliorato per la produzione di clinker a partire da farina cruda e relativo processo
WO2012073711A1 (ja) * 2010-12-01 2012-06-07 株式会社 エコ・アシスト長崎 低温熱分解方法及び低温熱分解炉

Also Published As

Publication number Publication date
CN117190655A (zh) 2023-12-08
US20230392864A1 (en) 2023-12-07
FR3136275A1 (fr) 2023-12-08
FR3136275B1 (fr) 2024-06-21

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