EP0141227B1 - Séchoir vertical - Google Patents

Séchoir vertical Download PDF

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Publication number
EP0141227B1
EP0141227B1 EP84111229A EP84111229A EP0141227B1 EP 0141227 B1 EP0141227 B1 EP 0141227B1 EP 84111229 A EP84111229 A EP 84111229A EP 84111229 A EP84111229 A EP 84111229A EP 0141227 B1 EP0141227 B1 EP 0141227B1
Authority
EP
European Patent Office
Prior art keywords
air
web
drying
treatment
chamber
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.)
Expired
Application number
EP84111229A
Other languages
German (de)
English (en)
Other versions
EP0141227A3 (en
EP0141227A2 (fr
Inventor
Gerold Fleissner
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.)
Truetzschler Nonwovens GmbH
Original Assignee
Fleissner 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 Fleissner GmbH filed Critical Fleissner GmbH
Publication of EP0141227A2 publication Critical patent/EP0141227A2/fr
Publication of EP0141227A3 publication Critical patent/EP0141227A3/de
Application granted granted Critical
Publication of EP0141227B1 publication Critical patent/EP0141227B1/fr
Expired 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
    • 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
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • 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
    • 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 invention relates to a drying chamber, e.g. B. predrying shaft or hot-flue construction, for the heat treatment of a vertically guided, a certain width having web with arranged on both sides of the web, in the direction of the web outlet openings having air guide boxes, which is assigned a radial fan for circulating the dry air.
  • a drying chamber e.g. B. predrying shaft or hot-flue construction
  • a device of this type is known from DE-A-23 20 479.
  • nozzle boxes are arranged transversely on both sides - subsequently offset from one another - which have their blow-in openings on the side end of the shaft.
  • a radial fan assigned to each nozzle box group is used to circulate the treatment air, the axis of rotation of which is oriented perpendicular to the web.
  • the treatment air is recirculated via channels arranged parallel to the nozzle boxes, so that there is a specific air circuit for each fan.
  • the motors for driving the fans are always arranged on the side on which the nozzle boxes are provided for the other side of the web. In this way, the drying shaft is narrow, although the drying shaft is very wide due to the alignment of the fans with their axis perpendicular to the web.
  • Drying shafts are generally only for pre-drying a z. B. with a dyeing product is required so that the web at the beginning of the drying process no longer comes into contact with any management organs.
  • a drying shaft is so z. B. above a foulard, from the last deflecting or squeezing roller, the web runs directly up into the drying shaft.
  • the task of such a predrying shaft is to achieve rapid heating and evaporation of the liquid. Pure nozzle ventilation is not sufficient for this.
  • the invention has for its object to find a drying shaft for pre-drying a web, in which, in addition to the radiant heaters, a recirculation system is also provided, which ensures the rapid removal of the heated moist air without fluttering the web.
  • the outer construction of the drying shaft should not be much deeper than is necessary to accommodate the infrared heating elements and an air supply. This means that several such drying shafts can be placed directly next to one another and do not hinder motors, fan boxes or the like.
  • a construction is to be found in which, in addition to a favorable energy balance, the smallest possible outer surface of the drying chute and nevertheless a rapid heating up of the material web and a rapid removal of the vaporized liquid is made possible.
  • the infrared heating elements are also arranged in the drying shaft here across the width of the web on both sides of the web. Because of this construction, the device is only a little deeper than is necessary for heating the web by means of the infrared heating elements. The greater depth is achieved solely by the air supply boxes required on both sides. The return of the treatment air accelerated by the fan takes place on the end faces of the drying shaft to the side of the width of the web so that the depth of the The drying shaft only has to be as wide as the diameter of the fan, of course taking into account the air volume that the air duct box has to accommodate on the respective web side.
  • the vertically installed drying shaft has an all-round insulated housing 1 which has the inlet slot 2 on the underside and the outlet slot 3 vertically above it.
  • the web 4 comes from a paddle arranged below the drying shaft, but not shown, and is above the shaft along the guide roller 5 to the next treatment unit, such as. B. another drying shaft.
  • the web 4 is dried on both sides with radiation energy and partly also with a convection system.
  • Infrared heating rods 6, which are arranged at a distance from one another, are responsible for the radiation energy, between which and the web 4 there is sufficient space to be able to move shielding depressions 7 in front of the infrared heating rods 6.
  • the shielding troughs 7 are arranged in a gap with the infrared heating elements 6 arranged one above the other, while they are pushed in front of the heating elements 6 when the web 4 is stationary and thus the web 4 is protected from the burning rays.
  • a dry air system serves to remove the moist air generated by the radiation energy along the surface of the web 4.
  • the heated to prevent cooling of the web 4 dry air passes through parallel to the web 4 slots 8, which are inclined upwards in the direction of the goods transport, between the infrared heating rods 6 and then between the respective shielding troughs 7 and then obliquely on the web 4.
  • By aligning the slots 8 upward in the transport direction of the web an upward air flow is generated on the web, which ensures the rapid evacuation of the resulting vapor layer.
  • an air extraction space 9 with a fresh air supply pipe 30 is provided on the right and left of the web 4, which is separated from the treatment area of the drying shaft by a screen cover 10.
  • the essential circulating air is extracted through this air outflow space 9, since the goods outlet slot 3 is narrowly delimited by metal sheets.
  • the air suction space 9 extends along the entire width of the drying shaft and has a radial fan 11, 12 on its end faces outside the width of the web, which generates a negative pressure in the air suction space 9.
  • the air suction chamber 9 is arranged according to FIG. 3 on both sides of the web 4 and extends conically widening from the center of the drying shaft to the fan suction chamber 13, into which the two air suction rooms 9 open from both sides of the web 4.
  • the fan suction space 13 is already arranged outside the treatment width of the drying shaft in the air return area 14 provided on the front side of the drying shaft.
  • This air return area 14 consists of two air return channels 15, 16, which emerge from FIG. 3 when viewed from above.
  • the air return channels 15, 16 are arranged on the inside of the outer housing 1 and leave between them a free space 17, which is provided for free access to the actual drying area in the drying shaft and is closed from the outside by a door 18.
  • the fan suction chamber 13 and the fan 11, 12 with the fan chamber 11 ', 12' and the air repulsion tube 31, 32 are arranged above the air return area 14, the fan suction chamber 13 and the fan 11, 12 with the fan chamber 11 ', 12' and the air repulsion tube 31, 32 are arranged.
  • the respective fan 11, 12 blows the air from above into the air return ducts 15, 16 via a sieve plate 19, which can also be seen in FIG.
  • the dry air then passes laterally into the air storage space 20, 21, which is delimited at the top by a sieve-shaped baffle 22, 23.
  • the heating unit 24, 25 is arranged above the baffle plate 22, 23 and, like the air storage space 20, 21, extends over the entire width of the drying area of the drying shaft extends.
  • the heating device 24, 25 is followed on each side of the web 4 by the respective air guide box 26, 27, which guides the heated treatment air to the slots 8.
  • the air duct 26, 27 is wide in the area of the heating device 24, 25 and narrow in the area of the air return spaces 9, ie it extends conically upwards.
  • the two air return areas 14 on both sides of the drying shaft are half bounded by a hinged door 28, 29 in the free flow cross section.
  • This door is closed when the device is operating, i.e. it is aligned vertically. If the web 4 is at a standstill, it is expedient to supply cooling air to the infrared heating elements 6 instead of heated circulating air. This is brought about by the doors 28, 29 swinging open and the treatment air accelerated by the fan 11, 12, bypassing the heating device 24, 25 flows immediately into the air guide box 26, 27 and thus to the infrared heating elements 6 via the slots 8. At the same time, the shielding troughs 7 will move in front of the infrared heating elements 6, so that burning of the material web is prevented with certainty.
  • the treatment air circulated by the fans 11, 12 not only flows from the storage spaces 20, 21 through the heating device 24, 25 into the treatment area, but also through slots 8 ′ arranged below the heating device 24, 25 onto the Web 4.
  • This treatment air has not yet flowed through the heating device again, but it still has enough heat to advantageously influence the drying process or the removal of the moist air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Claims (17)

1. Gaine de séchage, par exemple gaine de préséchage ou structure de conduit à gaz très chauds, pour le traitement par la chaleur d'une bande de tissu présentant une certaine largeur, qui y est guidée verticalement, cette gaine de séchage comportant des caisses de guidage d'air prévues de façon à se trouver aux deux côtés de la bande de tissu traitée et présentant des ouvertures de soufflage dirigées de manière à déboucher vers 12 bande de tissu, caisses de guidade d'air auxquelles il est adjoint un ventilateur radial destiné à faire circuler l'air de sechage, la gaine de séchage étant caractérisée
a) en ce que, sur sa hauteur, il est prévu des éléments de chauffage aux rayons infrarouges (6) montés de façon qu'ils se trouvent aux deux côtés de la bande de tissu traitée (4),
b) en ce que les caisses de guidage d'air (26, 27) sont prévues de telle sorte que l'une d'elles seulement se trouve à chacun des côtés de la bande de tissu traitée (4) et couvre la bauteur de traitement de la gaine,
c) en ce que chacune des caisses de guidage d'air (26, 27) couvre également la largeur de traitement de la gaine,
d) en ce que la caisse de guidage d'air (26, 27) présente l'ouverture d'admission d'air de séchage à la face inférieure, et
e) en ce qu'au-dessus de la hauteur de traitement de la caisse de guidage d'air (26, 27), il est prévu une chambre d'aspiration d'air (9),
f) à laquelle le ventilateur radial (11, 12) est adjoint en bout, de telle façon que son axe de rotation soit parallèle à la bande de tissu traitée (4), dans une chambre de ventilateur correspondante (11', 12'),
g) qui est prévue à l'extérieur de la largeur de traitement, dans une chambre de retour d'air (14) prévue à la face frontale de la gaine de séchage et s'étendant sur la hauteur de celle-ci.
2. Dispositif suivant la revendication 1, caractérisé en ce qu'à chacune des deux faces frontales de la gaine de séchage, un ventilateur radial (11, 12) est adjoint à la chambre d'aspiration d'air correspondante (9).
3. Dispositif suivant l'une ou l'autre des revendications 1 et 2, caractérisé en ce que les chambres d'aspiration d'air (9) sont prévues de telle façon qu'elles se trouvent aux deux côtés de la bande de tissu traitée (4), immédiatement au-dessus des caisses de guidage d'air correspondantes (26, 27).
4. Dispositif suivant la revendication 3, caractérisé en ce que chaque chambre d'aspiration d'air (9) n'est ouverte qu'en direction du plan de guidage de la bande de tissu traitée (4) et est, au côté d'ouverture, munie d'une plaque destinée à retenir la poussière de l'air, telle qu'une plaque de tamisage (10).
5. Dispositif suivant l'une quelconque des revendications 2 à 4, caractérisé en ce que les deux chambres d'aspiration d'air (9), qui sont prévues de façon à se trouver chacune à un côté de la bande de tissu traitée (4), ne débouchent chacune que dans une chambre d'aspiration de ventilateur (13), à l'extérieur de la largeur de traitement.
6. Dispositif suivant l'une quelconque des revendications 2 à 5, caractérisé en ce que la chambre d'aspiration d'air (9) est reliée à une ouverture d'aspiration d'air frais (30).
7. Dispositif suivant l'une quelconque des revendications 2 à 6, caractérisé en ce que la chambre d'aspiration d'air (9) va en s'élargissant en forme de tronc de cône en direction de la chambre d'aspiration de ventilateur (13).
8. Dispositif suivant l'une quelconque des revendications 1 à 7, caractérisé en ce qu'aux ventilateurs radiaux (11, 12), il est adjoint une chambre de retour d'air (14) se présentant en deux canaux (15, 16) pour les deux côtés de la bande de tissu traitée (4).
9. Dispositif suivant la revendication 8, caractérisé en ce que les canaux de retour d'air (15, 16) sont prévus à distance l'un de l'autre et sont voisins de la paroi (1) du corps de la gaine.
10. Dispositif suivant la revendication 9, caractérisé en ce qu'une ouverture (18), pouvant être fermée, et les canaux de retour d'air (15, 16), qui sont latéraux par rapport à cette ouverture, sont prévus au milieu de la paroi (1) du corps de la gaine qui se trouve à la face frontale.
11. Dispositif suivant l'une quelconque des revendications 8 à 10, caractérisé en ce que les canaux de retour d'air (15, 16) débouchent, à la partie supérieure, par une plaque de tamisage (19) qui les couvre et, à la partie inférieure, latéralement, dans la zone de traitement de la gaine de séchage.
12. Dispositif suivant l'une quelconque des revendications 1 à 11, caractérisé en ce qu'il comporte un appareil de chauffage (24, 25) qui couvre la largeur de traitement, parallèlement à l'ouverture d'admission d'air de séchage de chacune des caisses de guidage d'air (26, 27), et qui s'étend sur la section transversale de la caisse de guidage d'air correspondante (26, 27).
13. Dispositif suivant la revendication 12, caractérisé en ce qu'en dessous de chacun des appareils de chauffage, il est prévu une chambre de retenue (20, 21) qui est parallèle à la largeur de travail et qui est séparée de l'appareil de chauffage correspondant, vers le haut, par une plaque de tamisage correspondante (22, 23).
14. Dispositif suivant la revendication 1, caractérisé en ce que les ouvertures de soufflage de chacune des caisses de guidage d'air (26, 27) se présentent sous la forme de fentes (8) qui s'étendent transversalement sur la largeur de travail.
15. Dispositif suivant la revendication 14, caractérisé en ce que les fentes précitées (8) sont inclinées en oblique vers le haut dans le sens du transport de la bande de tissu traitée (4).
16. Dispositif suivant l'une quelconque des revendications 13 à 15, caractérisé en ce que dans les parois qui délimitent les chambres de retenue (20, 21) par rapport à la zone de traitement, il est également prévu des ouvertures de soufflage, qui se présentent sous la forme de fentes (8')..
17. Dispositif suivant l'une quelconque des revendications 1 à 16, caractérisé en ce qu'à chacun des canaux de retour d'air (15, 16), il est prévu, au-dessus de chacun des appareils de chauffage (24, 25) correspondant, dans la paroi qui le sépare de la caisse de guidage d'air correspondante (26, 27), une porte (28, 29) couvrant la profondeur de la caisse de guidage d'air (26, 27), porte qui s'écarte en pivotant vers le haut en direction de la paroi (1) du corps de la gaine.
EP84111229A 1983-09-23 1984-09-20 Séchoir vertical Expired EP0141227B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833334381 DE3334381A1 (de) 1983-09-23 1983-09-23 Trockenschacht
DE3334381 1983-09-23

Publications (3)

Publication Number Publication Date
EP0141227A2 EP0141227A2 (fr) 1985-05-15
EP0141227A3 EP0141227A3 (en) 1986-01-08
EP0141227B1 true EP0141227B1 (fr) 1987-11-04

Family

ID=6209819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111229A Expired EP0141227B1 (fr) 1983-09-23 1984-09-20 Séchoir vertical

Country Status (3)

Country Link
US (1) US4658512A (fr)
EP (1) EP0141227B1 (fr)
DE (2) DE3334381A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3811620A1 (de) * 1988-04-07 1989-10-26 Vits Maschinenbau Gmbh Verfahren und vorrichtung zur waermebehandlung und/oder trocknung einer materialbahn im durchlauf
EP0416944A1 (fr) * 1989-09-08 1991-03-13 W.R. Grace & Co.-Conn. Système de séchage infrarouge
DE4000622A1 (de) * 1990-01-11 1991-07-18 Fleissner Maschf Ag Trockenschacht
US5228210A (en) * 1990-08-04 1993-07-20 Agfa-Gevaert Ag Method of and apparatus for drying for film developing device
DE4244003A1 (de) * 1992-12-24 1994-06-30 Platsch Hans G Strahlungstrocknerleiste und Strahlungstrockner mit solcher
US5867920A (en) * 1997-02-05 1999-02-09 Megtec Systems, Inc. High speed infrared/convection dryer
US6049995A (en) * 1999-04-20 2000-04-18 Megtec Systems, Inc. Infrared dryer with air purge shutter
CN100349737C (zh) * 2005-06-02 2007-11-21 郝强 一种卧式圆网高温烘箱
US20080184589A1 (en) * 2007-02-02 2008-08-07 The Shivvers Group, Inc., An Iowa Corporation High efficiency drier with heating and drying zones

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE94150C (fr) *
US3590495A (en) * 1969-05-02 1971-07-06 Goodyear Tire & Rubber Dryer or heater with shielding means
DE2320479A1 (de) * 1973-04-21 1974-11-07 Vepa Ag Vorrichtung wie trockenschacht oder hotflue
US3900959A (en) * 1973-05-07 1975-08-26 Minnesota Mining & Mfg Combined infra-red and air flow drying for photographic film
FR2391437A1 (fr) * 1977-05-18 1978-12-15 Air Ind Perfectionnements apportes aux installations de traitement d'un produit en milieu gazeux
US4336279A (en) * 1978-07-04 1982-06-22 Metzger Wesley A Apparatus and process for drying and curing coated substrates
US4257172A (en) * 1979-01-22 1981-03-24 Olympic Infra-Dry Inc. Combination forced air and infrared dryer

Also Published As

Publication number Publication date
EP0141227A3 (en) 1986-01-08
US4658512A (en) 1987-04-21
DE3334381A1 (de) 1985-04-11
DE3467241D1 (en) 1987-12-10
EP0141227A2 (fr) 1985-05-15

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