EP0937956A1 - Vorrichtung zur Wärmebehandlung von durchlaufenden Materialbahnen - Google Patents

Vorrichtung zur Wärmebehandlung von durchlaufenden Materialbahnen Download PDF

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Publication number
EP0937956A1
EP0937956A1 EP99420045A EP99420045A EP0937956A1 EP 0937956 A1 EP0937956 A1 EP 0937956A1 EP 99420045 A EP99420045 A EP 99420045A EP 99420045 A EP99420045 A EP 99420045A EP 0937956 A1 EP0937956 A1 EP 0937956A1
Authority
EP
European Patent Office
Prior art keywords
air
assembly
infrared
module
blowing
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Withdrawn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
EP99420045A
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English (en)
French (fr)
Inventor
Grégoire Lizé
Michel Guenault
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.)
Ets Madeleine Sa
Infra Rouge System
Original Assignee
Ets Madeleine Sa
Infra Rouge System
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 Ets Madeleine Sa, Infra Rouge System filed Critical Ets Madeleine Sa
Publication of EP0937956A1 publication Critical patent/EP0937956A1/de
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection

Definitions

  • the present invention relates to the field of manufacture and processing of sheet materials, such as than papers or films or textile products, or sheet metal products, and it relates, more particularly to a device intended for the treatment thermal of this kind of material, for example in order to their drying, this treatment being carried out on the material in continuously moving sheet, in the form of a strip uninterrupted more or less wide. he can here, in particular, paper manufacturing layer.
  • the size of hoods used affects stability and maneuverability of the sheet that runs through them.
  • the sheet becomes difficult to control, because the distance between two points that can guide it widens until it becomes critical. This results in a increased risk of leaf breakage, risk that is returned all the more important as the speeds of sheet and air flow.
  • drying installations strip products including paper, which include an infrared radiation module in particular with electric infrared emitters, module to which follows, further down in the direction of travel of the sheet material, a blowing assembly and air intake.
  • the infrared module is completely dissociated from the assembly blowing and suction air, and located outside from this set, from which it can be separated by a interval (case of document WO 8809845 A) or even by a thermally insulating wall (case of the document WO 8904890 A).
  • the present invention aims to eliminate all disadvantages previously outlined, providing a device which, for a space requirement in length strongly reduced, significantly improves overall thermal efficiency and avoids the risk of breakage or destruction of the treated leaf.
  • the present invention relates to a device for the heat treatment of materials in continuously scrolling sheet, comprising at least one module of infrared radiation, comprising emitters of electric type, and a blowing assembly and air intake, traversed longitudinally by the sheet material, the device being characterized in that the infrared emitter module is incorporated in the upstream part of the blowing assembly and air intake, inside this set.
  • the invention proposes to integrate indoor infrared emitters a device such as an air cushion hood for the evacuation of the water contained in a sheet, in particular of paper. In this way we remove causes of energy loss, because all the energy dissipated by the infrared module remains inside the hood, and therefore finds usable.
  • the heat transfer will be made by the infrared radiation directed onto the sheet.
  • the air blown and aspirated, especially downstream of the transmitter module infrared radiation, will no longer have functions essential than performing mass transfer, i.e. the evacuation of the water evaporated by the energy contribution of infrared radiation, and also to support the leaf while scrolling.
  • the device can therefore operate with low air temperatures, of the order of 110 to 130 ° C.
  • the device comprises means which return the cooling air from the transmitters infrared of the aforementioned module and which then inject this air in the air heating boxes, without intake of external energy to heat the air.
  • a pre-heating of the fresh air, directed towards the module infrared radiation emitter to ensure its cooling is achievable by means of an exchanger also crossed by the air extracted from the assembly blowing and suction, this extract air containing water or other evaporated product to drain.
  • the thermal efficiency of the device (yield of the transfer operation of heat from the source to the leaf) is excellent.
  • the invention thus makes it possible to use transmitters electric type infrared, with overall efficiency of the device which is about 75% to 80%, while the current infrared systems do not exceed 30 or 40% while the efficiency of an air flow transfer is about 70%.
  • the invention makes it possible to reduce from two to four times the length of the device, compared to a conventional hood, allowing for example a passage with a length of 9 meters to a length of 3 meters, which gives reduced free leaf lengths, very favorable for fast machines. Thanks to this important shortening, the device which is the subject of the invention can also be inserted without difficulty in existing installations.
  • the device shown in the drawing ensures the heat treatment, including drying, of a material in sheet designated by the reference 1, which scrolls continuously in the direction indicated by the arrow F, i.e. from right to left with reference to the figure.
  • Sheet material 1 thus passes longitudinally through a blowing assembly and air intake, generally designated by the reference 2.
  • the material sheet 1 goes through a temperature rise equipment not shown, located upstream of said assembly 2 and does not not the subject of the present invention.
  • Blowing and air suction assembly 2 includes an upper part 3, surmounting the material in sheet 1 to be treated, and a lower part 4, located below the path of this sheet material 1.
  • These two parts 3 and 4 in the form of boxes include, distributed over their length, of the organs respectively designated by 5 and 6, which provide blowing and air intake, as suggested by the small arrows f, so as in particular to ensure the levitation of the sheet material 1, in its crossing of the assembly 2.
  • a radiation module infrared 7 is incorporated in the upstream part of the blowing and air suction assembly 2, at inside this set 2.
  • Module 7 here includes, on the side of the upper part 3 of the assembly 2, infrared emitters 8 of electrical type.
  • This module 7 is completed, on the side of the lower part 4 of the assembly 2, by a reflector 9 located opposite the infrared emitters 8.
  • a reflector 9 located opposite the infrared emitters 8.
  • the infrared radiation module 7 comprises, for cooling its infrared emitters 8, a fresh air supply 10 from outside. On leaving module 7, the air from warmed cooling is injected through appropriate guide 11, in the air supply box that constitutes the upper part 3 of the assembly 2, and this air is also brought through a duct 12 into the box consisting of the lower part 4.
  • the exchanger 13 is also traversed by the extracted air, coming directly from the part upper 3 of the suction blowing assembly 2, and indirectly (via a conduit 14) from the bottom 4 of this assembly 2, this air then being directed towards a evacuation.
  • the infrared radiation 7 provides heat transfer to the sheet material 1, as it enters the assembly 2.
  • the hot air extracted containing the evaporated water, passes through the exchanger 13 which preheats the fresh air directed to the infrared radiation module 7.
  • the extraction of extracted air also ensures extraction evaporated water, and the sheet material 1 comes out of the whole 2 being dried.
  • the device applies especially in the fields of paper, synthetic films and textile products, during manufacture or treatment.
  • This device can also be applied to processing of sheet metal products, for example for drying coatings deposited on such products metallic.
EP99420045A 1998-02-19 1999-02-18 Vorrichtung zur Wärmebehandlung von durchlaufenden Materialbahnen Withdrawn EP0937956A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9802225A FR2775065B1 (fr) 1998-02-19 1998-02-19 Dispositif pour le traitement thermique de materiaux en feuille defilant en continu
FR9802225 1998-02-19

Publications (1)

Publication Number Publication Date
EP0937956A1 true EP0937956A1 (de) 1999-08-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99420045A Withdrawn EP0937956A1 (de) 1998-02-19 1999-02-18 Vorrichtung zur Wärmebehandlung von durchlaufenden Materialbahnen

Country Status (2)

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EP (1) EP0937956A1 (de)
FR (1) FR2775065B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2166299A3 (de) * 2008-09-22 2012-10-24 Voith Patent GmbH Materialbahntrockneranordnung
EP2166298A3 (de) * 2008-09-22 2012-10-24 Voith Patent GmbH Materialbahntrockneranordnung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113739546A (zh) * 2021-08-06 2021-12-03 安徽省天助纺织科技集团股份有限公司 一种棉纺织加工用循环烘干设备

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405813A (en) * 1944-05-06 1946-08-13 B F Sturtevant Co Drier
GB1480076A (en) * 1973-10-12 1977-07-20 Buettner Schilde Haas Ag Deflected-stream dryers for drying web material
US4336279A (en) * 1978-07-04 1982-06-22 Metzger Wesley A Apparatus and process for drying and curing coated substrates
US4379435A (en) * 1981-10-19 1983-04-12 Northern Telecom Limited Drying oven for indefinite length material
US4756091A (en) * 1987-06-25 1988-07-12 Herbert Van Denend Hybrid high-velocity heated air/infra-red drying oven
WO1988007103A1 (en) * 1987-03-11 1988-09-22 Valmet Paper Machinery Inc. Arrangement for drying a running web
WO1988009845A1 (en) * 1987-06-04 1988-12-15 Valmet Paper Machinery Inc. Method in the drying of a paper web or equivalent
WO1989004890A1 (en) * 1987-11-26 1989-06-01 Valmet Oy Method and device in on-machine coating-drying of a paper web or equivalent
FR2630532A1 (fr) * 1988-04-25 1989-10-27 Valmet Paper Machinery Inc Procede et dispositif de sechage continu consistant en un sechoir a infrarouges et a gaz et un sechoir de bande en suspension dans l'air
DE4029488A1 (de) * 1989-09-25 1991-04-04 Valmet Paper Machinery Inc Verfahren zum beruehrungslosen trocknen einer papier- oder kartonbahn
WO1998034079A1 (en) * 1997-02-05 1998-08-06 Megtec Systems, Inc. High speed infrared/convection dryer

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405813A (en) * 1944-05-06 1946-08-13 B F Sturtevant Co Drier
GB1480076A (en) * 1973-10-12 1977-07-20 Buettner Schilde Haas Ag Deflected-stream dryers for drying web material
US4336279A (en) * 1978-07-04 1982-06-22 Metzger Wesley A Apparatus and process for drying and curing coated substrates
US4379435A (en) * 1981-10-19 1983-04-12 Northern Telecom Limited Drying oven for indefinite length material
WO1988007103A1 (en) * 1987-03-11 1988-09-22 Valmet Paper Machinery Inc. Arrangement for drying a running web
WO1988009845A1 (en) * 1987-06-04 1988-12-15 Valmet Paper Machinery Inc. Method in the drying of a paper web or equivalent
US4756091A (en) * 1987-06-25 1988-07-12 Herbert Van Denend Hybrid high-velocity heated air/infra-red drying oven
WO1989004890A1 (en) * 1987-11-26 1989-06-01 Valmet Oy Method and device in on-machine coating-drying of a paper web or equivalent
FR2630532A1 (fr) * 1988-04-25 1989-10-27 Valmet Paper Machinery Inc Procede et dispositif de sechage continu consistant en un sechoir a infrarouges et a gaz et un sechoir de bande en suspension dans l'air
DE4029488A1 (de) * 1989-09-25 1991-04-04 Valmet Paper Machinery Inc Verfahren zum beruehrungslosen trocknen einer papier- oder kartonbahn
WO1998034079A1 (en) * 1997-02-05 1998-08-06 Megtec Systems, Inc. High speed infrared/convection dryer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2166299A3 (de) * 2008-09-22 2012-10-24 Voith Patent GmbH Materialbahntrockneranordnung
EP2166298A3 (de) * 2008-09-22 2012-10-24 Voith Patent GmbH Materialbahntrockneranordnung

Also Published As

Publication number Publication date
FR2775065A1 (fr) 1999-08-20
FR2775065B1 (fr) 2000-05-26

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