EP0063642B1 - Apparatus for hot-air drying of textile materials - Google Patents

Apparatus for hot-air drying of textile materials Download PDF

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Publication number
EP0063642B1
EP0063642B1 EP81109658A EP81109658A EP0063642B1 EP 0063642 B1 EP0063642 B1 EP 0063642B1 EP 81109658 A EP81109658 A EP 81109658A EP 81109658 A EP81109658 A EP 81109658A EP 0063642 B1 EP0063642 B1 EP 0063642B1
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EP
European Patent Office
Prior art keywords
drying
textile material
drying zone
hot air
conveyor belt
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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
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EP81109658A
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German (de)
French (fr)
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EP0063642A1 (en
Inventor
Gerhard Petersohn
Rolf Walter
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Brueckner Trockentechnik GmbH and Co KG
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Brueckner Trockentechnik GmbH and Co KG
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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
    • F26B13/103—Supporting materials without tension, e.g. on or between foraminous belts with mechanical supporting means, e.g. belts, rollers, and fluid impingement arrangement having a displacing effect on the materials

Definitions

  • the invention relates to a device according to the first part of claim 1.
  • a device of this type is known from DE-A-2 301 938.
  • the series connection of inflation and suction drying zones allows the textile material to be dried intensively on the one hand, but on the other hand to allow the textile material to shrink freely.
  • the nozzle boxes of the inflation drying zone are provided with hot air outlet slots directed vertically onto the carrier tape. If the beginning of a web-shaped textile material runs into this drying zone, the beginning of the web tends to roll up when the first, vertically directed air jet hits the goods from below. This rolling up of the beginning of the web hinders the further movement of the textile goods through the dryer and can lead to malfunctions.
  • the invention is therefore based on the object of designing the device according to the first part of claim 1 in such a way that the beginning of a textile web entering the device is prevented from curling up.
  • a very flat hot air jet which acts at an angle of 10 to 20 ° to the horizontal and acts in the transport direction of the textile material, hits the textile material through the first upper nozzle box of each inflation drying zone, the undesired rolling up of the beginning of the web (under the effect of the first hot air jet directed from below).
  • the first lower nozzle box of each inflation drying zone is arranged below the second upper nozzle box. There is thus no lower nozzle box blowing upwards under the first upper nozzle box with the particularly flatly inclined outlet slot.
  • the device 1 illustrated in FIGS. 1 and 2 is used for hot air drying of textile goods 3 which are moved continuously in the direction of the arrows 2 (that is to say in the longitudinal direction).
  • This illustrated exemplary embodiment is a drying device 1 in which for transporting the Textile goods 3, two superposed, continuous longitudinal support belts are provided, each of which can be formed in the usual way by a screen belt or another suitable perforated support belt.
  • each carrier tape 4, 5 is used to place the textile goods 3 to be dried, so that the device 1 has two superimposed drying levels which are passed through one after the other by the textile goods 3 (in the direction of the arrow 2);
  • the textile material 3 is therefore first dried in the upper floor formed by the upper carrying belt 4 and then (in opposite directions) in the second floor below, which is formed by the lower carrying belt 5.
  • the inlet and the outlet for the textile material 3 are thus on the same end face 1 a of the device 1.
  • the device 1 has a housing 6, which is designed in a customary manner in the usual manner, and is divided in the longitudinal direction in each drying level into a plurality of drying zones with different air routing which are successively penetrated by the associated support tape 4 or 5.
  • each drying level namely the drying zones 7 to 10 in the upper drying level and the drying zones 11 to 14 in the lower drying level , each seen in the order in which the textile goods 3 pass through them (according to arrow 2).
  • Drying zones 7 and 9 of the upper drying level and 11 and 13 of the lower drying level each form an inflation drying zone
  • drying zones 8 and 10 of the upper level and 12 and 14 of the lower level are each designed as suction drying zones, so that the inflation drying zones 7, 9, 11 and 13 and the suction drying zones 8, 10, 12, 14 are arranged alternately over the length of the device 1 or each drying floor.
  • drying zones 7 to 10 of the upper floor are each arranged directly above corresponding drying zones 11 to 14 of the lower floor, with an inflation drying zone lying above a suction drying zone or vice versa and two drying zones one above the other (i.e. 7 and 14, 8 and 13, 9 and 12 and 10 and 11) of both floors form a drying section;
  • the drying zones 7 to 14 have two types of air flow which are different in principle.
  • the air supply and the air discharge are on the same side of the associated support belt 4 or 5, so that the hot air in the form of a convection flow with the loose in these drying zones on the support belt 4 or 5 Textile 3 comes into contact;
  • the suction drying zones 8, 10, 12, 14 the air supply is arranged above and the air discharge below the carrier belt, so that the textile material 3 flows through the hot air in these drying zones and is pressed onto the carrier belt 4 and 5, respectively. H. in other words, the hot air is sucked through the textile material 3 in these suction drying zones 8, 10, 12, 14.
  • Each inflation drying zone 7, 9, 11, 13 is constructed essentially in the same way and contains a group of nozzle boxes (upper nozzle boxes 15) that can be supplied with hot air and extend over the entire width of the fabric (see FIG. 2) above and below the carrying belt 4 or 5 and lower nozzle boxes 16).
  • the nozzle boxes 15 of the upper group of each inflation drying zone have hot air outlet slots 17, 17a directed obliquely towards the textile material 3 in the transport direction (arrow 2) (cf. also FIG. 3).
  • the outlet slot 17a of the first nozzle box 15 of each group is inclined at an angle IX of approximately 10 to 20 °, preferably approximately 15 °, to the horizontal, while the outlet slots 17 of the other nozzle boxes 15 are inclined the horizontal form an angle ⁇ of approximately 45 to 75 °, preferably approximately 60 °.
  • the nozzle boxes 16 of the lower group of each inflation drying zone have hot air outlet slots 18 directed approximately perpendicular to the carrier tape 4 or 5.
  • these outlet slots 18 of the lower nozzle boxes 16 are arranged offset in the longitudinal direction of the device 1 with respect to the oblique outlet slots 17, 17a of the upper nozzle boxes 15 (see in particular FIG. 3).
  • This last-explained arrangement leads in an extremely favorable manner to the fact that the textile material 3 is lifted and pressed against this carrier belt 4, 5 during its transport through each inflation drying zone 7, 9, 11, 13 in constant alternation from the associated carrier belt 4, 5, the inflation drying zones So it runs through in waves.
  • the advantage of the outlet slots 17 directed obliquely against the carrier tape 4, 5 or the textile material 3 located thereon is a stabilization of the textile material 3 during its transport (even if it is multi-lane textile material), while the advantage of the at the flatter angle IX directed outlet slots 17a of the first nozzle box 15 lies in that a longitudinal curling of the textile goods 3 is prevented when new goods arrive. It is furthermore expedient not to provide any lower nozzle box 16 which blows out upwards under these first upper nozzle boxes 15 (with the flatly inclined outlet slot 17a).
  • the hot air emerging from the upper and lower nozzle boxes 15, 16 and their outlet slots 17, 17a and 18 is shown in FIG. 3 by dashed arrows.
  • low-friction guide elements 19 In order to prevent the textile material 3 from being grinded, braked or possibly diverted on the undersides of these nozzle boxes 15 during transport below the upper nozzle boxes 15 of each inflation drying zone 7, 9, 11, 13, a number of is located just below each upper nozzle box group arranged in the direction of movement of the textile material 3, low-friction guide elements 19 (see FIG. 3).
  • These guide elements 19 can be narrow tapes, cords, wires or similar elements which consist of or are coated with low-friction material and which are arranged at a sufficient distance from one another (viewed in the transverse direction of the device 1), so that the hot air escaping from the upper nozzle boxes 15 in the direction of the textile material 3 can flow through there without significant impairment.
  • the suction drying zones 8, 10, 12, 14 are also essentially of the same design.
  • a vacuum box 20 which also extends over the entire width of the fabric, under the carrying belt 4 or 5 (if necessary, several such vacuum boxes can of course also be arranged in each suction drying zone).
  • Each vacuum box 20 has a suitable perforation on its upper side 20a directed against the carrier tape 4 or 5 and extends in the longitudinal direction of the device 1 almost over the entire effective length of the associated suction drying zone.
  • a particularly expedient structure of the device 1 results from the cross-sectional illustration in FIG. 2.
  • the drying section is formed by the suction drying zone 8 lying above and the inflation drying zone 13 lying underneath.
  • Each drying section of the device 1 is now assigned a single circulating air fan (for example 21 in FIG. 2) in such a way that the two drying zones lying one above the other (upper suction drying zone 8 and lower inflation drying zone 13) are successively from the same hot air stream (dashed arrows 22) be enforced.
  • a suitable heat exchanger 23 of conventional design is expediently connected upstream of the suction side of the fan 21.
  • each drying section In each drying section, a part of the circulating air can be discharged in the usual way via a pipe connection 24 and via a manifold 25 (common for all drying sections), while a corresponding proportion of fresh air is newly introduced (which is not illustrated in more detail).
  • the fan 21 is on the side arranged on the left long side.
  • the fan (not shown) assigned to this suction drying zone 14 not only sucks in circulating air from the interior of the device housing 6, but also cool fresh air to a considerable extent in order to be able to bring about the desired cooling of the textile material 3.
  • a corresponding device which essentially contains a suction hood 26 extending over the entire working width (perpendicular to the plane of the drawing in FIG. 1) of the device 1 and a screen plate 27 installed in the end face 1 of the device 1 or the housing 6 .
  • the suction hood 26 runs from the end face 1a of the device 1, that is to say from the sieve plate 27, in the longitudinal direction of the device 1, inclined in the direction of the textile material 3, this suction hood 26 having approximately the same length as this suction drying zone 14 Suction drying zone 14 supplied cool fresh air (arrows 28) mixed with warm circulating air (arrows 29), so that the textile material 3 flows through this mixed air and is cooled in a favorable manner. At the same time, the temperature of the mixed air is increased before the circulating air is finally heated up in the usual way with the aid of the heat exchanger assigned to the fan. Sufficiently dry and cool fresh air can thus be continuously introduced into the entire air circulation system of the device 1 through the suction hood 26 and the sieve plate 27.
  • the last drying zone could of course also be formed in a drying device with only one floor. If only the upper floor were present in FIG. 1, then the suction drying zone 10 would be the last drying zone passing through the textile material and would accordingly be equipped with devices for introducing the cool fresh air.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

Die Erfindung betrifft eine Vorrichtung entsprechend dem ersten Teil des Anspruches 1.The invention relates to a device according to the first part of claim 1.

Eine Vorrichtung dieser Art ist durch die DE-A-2 301 938 bekannt. Die Hintereinanderschaltung von Aufblas- und Saugtrocknungszonen gestattet es, das Textilgut einerseits intensiv zu trocknen, andererseits jedoch die Möglichkeit einer freien Krumpfung des Textilgutes zu erhalten.A device of this type is known from DE-A-2 301 938. The series connection of inflation and suction drying zones allows the textile material to be dried intensively on the one hand, but on the other hand to allow the textile material to shrink freely.

Bei der bekannten Vorrichtung sind die Düsenkästen der Aufblastrocknungszone mit senkrecht auf das Tragband gerichteten Heißluft-Austrittsschlitzen versehen. Läuft der Anfang eines bahnförmigen Textilgutes in diese Trocknungszone ein, so neigt der Bahnanfang zur Aufrollung, wenn der erste, senkrecht gerichtete Luftstrahl von unten gegen die Ware trifft. Dieses Aufrollen des Warenbahnanfangs behindert die weitere Bewegung des Textilgutes durch den Trockner und kann zu Betriebsstörungen führen.In the known device, the nozzle boxes of the inflation drying zone are provided with hot air outlet slots directed vertically onto the carrier tape. If the beginning of a web-shaped textile material runs into this drying zone, the beginning of the web tends to roll up when the first, vertically directed air jet hits the goods from below. This rolling up of the beginning of the web hinders the further movement of the textile goods through the dryer and can lead to malfunctions.

Der Erfindung liegt daher die Aufgabe zugrunde, die Vorrichtung gemäß dem ersten Teil des Anspruches 1 so auszubilden, daß ein Einrollen des Anfanges einer in die Vorrichtung einlaufenden Textilbahn verhindert wird.The invention is therefore based on the object of designing the device according to the first part of claim 1 in such a way that the beginning of a textile web entering the device is prevented from curling up.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Indem bei der erfindungsgemäßen Vorrichtung durch den ersten oberen Düsenkasten jeder Aufblastrocknungszone ein sehr flacher, nämlich unter einem Winkel von 10 bis 20° zur Horizontalen geneigter, in Transportrichtung des Textilgutes wirkender Heißluftstrahl auf das Textilgut trifft, wird das unerwünschte Aufrollen des Warenbahnanfangs (unter der Wirkung des ersten von unten gerichteten Heißluftstrahles) vermieden.Since in the device according to the invention a very flat hot air jet, which acts at an angle of 10 to 20 ° to the horizontal and acts in the transport direction of the textile material, hits the textile material through the first upper nozzle box of each inflation drying zone, the undesired rolling up of the beginning of the web (under the effect of the first hot air jet directed from below).

Dieser Effekt der Niederhaltung des Warenbahnanfangs wird noch dadurch unterstützt, daß gemäß einer zweckmäßigen Ausgestaltung der Erfindung der erste untere Düsenkasten jeder Aufblastrocknungszone unterhalb des zweiten oberen Düsenkastens angeordnet ist. Hierbei befindet sich somit unter dem ersten oberen Düsenkasten mit dem besonders flach geneigten Austrittsschlitz kein nach oben blasender unterer Düsenkasten.This effect of holding down the beginning of the web is further supported by the fact that, according to an expedient embodiment of the invention, the first lower nozzle box of each inflation drying zone is arranged below the second upper nozzle box. There is thus no lower nozzle box blowing upwards under the first upper nozzle box with the particularly flatly inclined outlet slot.

In der vereinfacht dargestellten Zeichnung zeigt

  • Fig. 1 einen Längsschnitt durch die Heißluft-Trockenvorrichtung;
  • Fig. 2 eine Querschnittansicht entlang der Linie 11-11 in Fig. 1;
  • Fig. eine vergrößerte Detailansicht (Ausschnitt 111 in Fig. 1) zur Erläuterung der Düsenkästen einer Aufblastrocknungszone.
In the simplified drawing shows
  • 1 shows a longitudinal section through the hot air drying device.
  • Fig. 2 is a cross-sectional view taken along line 11-11 in Fig. 1;
  • Fig. An enlarged detail view (section 111 in Fig. 1) to explain the nozzle boxes of an inflation drying zone.

Die in den Fig. 1 und 2 veranschaulichte Vorrichtung 1 dient zur Heißluft-Trocknung von kontinuierlich in Richtung der Pfeile 2 (also in Längsrichtung) bewegtem Textilgut 3. Bei diesem veranschaulichten Ausführungsbeispiel handelt es sich um eine Trocknungsvorrichtung 1, in der für den Transport des Textilgutes 3 zwei übereinander angeordnete, in Längsrichtung durchlaufende Tragbänder vorgesehen sind, die jeweils in üblicher Weise durch ein Siebband oder ein anderes geeignetes perforiertes Tragband gebildet sein können. Das jeweils obere Trum 4a bzw. 5a jedes Tragbandes 4, 5 dient dabei zum Auflegen des zu trocknenden Textilgutes 3, so daß die Vorrichtung 1 zwei übereinander liegende Trocknungsetagen besitzt, die nacheinander vom Textilgut 3 durchlaufen werden (in Pfeilrichtung 2); im dargestellten Ausführungsbeispiel wird also das Textilgut 3 zunächst in der durch das obere Tragband 4 gebildeten oberen Etage und dann (gegenläufig) in der darunter liegenden zweiten Etage getrocknet, die von dem unteren Tragband 5 gebildet wird. Der Einlauf und der Auslauf für das Textilgut 3 befinden sich somit an derselben Stirnseite 1 a der Vorrichtung 1.The device 1 illustrated in FIGS. 1 and 2 is used for hot air drying of textile goods 3 which are moved continuously in the direction of the arrows 2 (that is to say in the longitudinal direction). This illustrated exemplary embodiment is a drying device 1 in which for transporting the Textile goods 3, two superposed, continuous longitudinal support belts are provided, each of which can be formed in the usual way by a screen belt or another suitable perforated support belt. The respective upper run 4a or 5a of each carrier tape 4, 5 is used to place the textile goods 3 to be dried, so that the device 1 has two superimposed drying levels which are passed through one after the other by the textile goods 3 (in the direction of the arrow 2); In the exemplary embodiment shown, the textile material 3 is therefore first dried in the upper floor formed by the upper carrying belt 4 and then (in opposite directions) in the second floor below, which is formed by the lower carrying belt 5. The inlet and the outlet for the textile material 3 are thus on the same end face 1 a of the device 1.

Die Vorrichtung 1 besitzt ein in üblicher Weise isoliert ausgebildetes Gehäuse 6 und ist in Längsrichtung in jeder Trocknungsetage in mehrere vom zugehörigen Tragband 4 bzw. 5 nacheinander durchsetzte Trocknungszonen mit unterschiedlicher Luftführung unterteilt.The device 1 has a housing 6, which is designed in a customary manner in the usual manner, and is divided in the longitudinal direction in each drying level into a plurality of drying zones with different air routing which are successively penetrated by the associated support tape 4 or 5.

Bei dem veranschaulichten Ausführungsbeispiel (vgl. insbesondere Fig. 1) sind in jeder Trocknungsetage vier in Längsrichtung der Vorrichtung 1 hintereinander liegende Trocknungszonen vorgesehen, und zwar befinden sich in der oberen Trocknungsetage die Trocknungszonen 7 bis 10 und in der unteren Trocknungsetage die Trocknungszonen 11 bis 14, jeweils in der Reihenfolge gesehen, wie sie vom Textilgut 3 durchlaufen werden (entsprechend Pfeil 2). Hierbei bilden die Trocknungszonen 7 und 9 der oberen Trocknungsetage sowie 11 und 13 der unteren Trocknungsetage jeweils eine Aufblastrocknungszone, während die Trocknungszone 8 und 10 der oberen Etage sowie 12 und 14 der unteren Etage jeweils als Saugtrocknungszonen ausgebildet sind, so daß also die Aufblastrocknungszonen 7, 9, 11 und 13 und die Saugtrocknungszonen 8, 10, 12, 14 über die Länge der Vorrichtung 1 bzw. jeder Trocknungsetage einander abwechselnd angeordnet sind. Ferner ist es dabei besonders vorteilhaft, daß die Trocknungszonen 7 bis 10 der oberen Etage jeweils direkt über entsprechenden Trocknungszonen 11 bis 14 der unteren Etage angeordnet sind, wobei jeweils eine Aufblastrocknungszone über einer Saugtrocknungszone bzw. umgekehrt liegt und zwei übereinander liegende Trocknungszonen (also 7 und 14, 8 und 13, 9 und 12 sowie 10 und 11) beider Etagen einen Trocknungsabschnitt bilden; im dargestellten Ausführungsbeispiel ergeben sich somit vier in Längsrichtung der Vorrichtung 1 hintereinander liegende Trocknungsabschnitte.In the exemplary embodiment illustrated (cf. in particular FIG. 1), four drying zones lying one behind the other in the longitudinal direction of the device 1 are provided in each drying level, namely the drying zones 7 to 10 in the upper drying level and the drying zones 11 to 14 in the lower drying level , each seen in the order in which the textile goods 3 pass through them (according to arrow 2). Drying zones 7 and 9 of the upper drying level and 11 and 13 of the lower drying level each form an inflation drying zone, while drying zones 8 and 10 of the upper level and 12 and 14 of the lower level are each designed as suction drying zones, so that the inflation drying zones 7, 9, 11 and 13 and the suction drying zones 8, 10, 12, 14 are arranged alternately over the length of the device 1 or each drying floor. Furthermore, it is particularly advantageous that the drying zones 7 to 10 of the upper floor are each arranged directly above corresponding drying zones 11 to 14 of the lower floor, with an inflation drying zone lying above a suction drying zone or vice versa and two drying zones one above the other (i.e. 7 and 14, 8 and 13, 9 and 12 and 10 and 11) of both floors form a drying section; In the exemplary embodiment shown, there are four drying sections lying one behind the other in the longitudinal direction of the device 1.

Die Trocknungszonen 7 bis 14 weisen zwei im Prinzip unterschiedliche Luftführungsarten auf. In den Aufblastrocknungszonen 7, 9, 11, 13 befinden sich die Luftzuführung und die Luftabführung auf derselben Seite des zugehörigen Tragbandes 4 bzw. 5, so daß die Heißluft in Form einer Konvektionsströmung mit dem in diesen Trocknungszonen locker auf dem Tragband 4 bzw. 5 aufliegenden Textilgut 3 in Berührung kommt; dagegen ist in den Saugtrocknungszonen 8, 10, 12, 14 die Luftzuführung oberhalb und die Luftabführung unterhalb des Tragbandes angeordnet, so daß das Textilgut 3 in diesen Trocknungszonen von der Heißluft durchströmt und auf das Tragband 4 bzw. 5 gedrückt wird, d. h. mit anderen Worten, in diesen Saugtrocknungszonen 8, 10, 12, 14 wird die Heißluft durch das Textilgut 3 hindurchgesaugt.The drying zones 7 to 14 have two types of air flow which are different in principle. In the inflation drying zones 7, 9, 11, 13, the air supply and the air discharge are on the same side of the associated support belt 4 or 5, so that the hot air in the form of a convection flow with the loose in these drying zones on the support belt 4 or 5 Textile 3 comes into contact; on the other hand, in the suction drying zones 8, 10, 12, 14 the air supply is arranged above and the air discharge below the carrier belt, so that the textile material 3 flows through the hot air in these drying zones and is pressed onto the carrier belt 4 and 5, respectively. H. in other words, the hot air is sucked through the textile material 3 in these suction drying zones 8, 10, 12, 14.

Jede Aufblastrocknungszone 7, 9, 11, 13 ist im wesentlichen gleichartig aufgebaut und enthält oberhalb und unterhalb des Tragbandes 4 bzw. 5 je eine Gruppe von mit Heißluft beaufschlagbaren, über die ganze Textilgutbreite (vgl. Fig. 2) reichende Düsenkästen (obere Düsenkästen 15 und untere Düsenkästen 16). Die Düsenkästen 15 der obereren Gruppe jeder Aufblastrocknungszone weist in Transportrichtung (Pfeil 2) schräg auf das Textilgut 3 gerichtete Heißluft-Austrittsschlitze 17, 17a auf (vgl. auch Fig.3). In Textilgut-Transportrichtung (Pfeil 2) betrachtet ist dabei der Austrittsschlitz 17a des jeweils ersten Düsenkastens 15 jeder Gruppe unter einem Winkel IX von etwa 10 bis 20°, vorzugsweise von etwa 15° zur Horizontalen geneigt, während die Austrittsschlitze 17 der übrigen Düsenkästen 15 mit der Horizontalen einen Winkel ß von etwa 45 bis 75°, vorzugsweise von etwa 60°, einschließen.Each inflation drying zone 7, 9, 11, 13 is constructed essentially in the same way and contains a group of nozzle boxes (upper nozzle boxes 15) that can be supplied with hot air and extend over the entire width of the fabric (see FIG. 2) above and below the carrying belt 4 or 5 and lower nozzle boxes 16). The nozzle boxes 15 of the upper group of each inflation drying zone have hot air outlet slots 17, 17a directed obliquely towards the textile material 3 in the transport direction (arrow 2) (cf. also FIG. 3). When viewed in the direction of textile transport (arrow 2), the outlet slot 17a of the first nozzle box 15 of each group is inclined at an angle IX of approximately 10 to 20 °, preferably approximately 15 °, to the horizontal, while the outlet slots 17 of the other nozzle boxes 15 are inclined the horizontal form an angle β of approximately 45 to 75 °, preferably approximately 60 °.

Im Gegensatz dazu weisen die Düsenkästen 16 der unteren Gruppe jeder Aufblastrocknungszone etwa senkrecht auf das Tragband 4 bzw. 5 gerichtete Heißluft-Austrittsschlitze 18 auf. Diese Austrittsschlitze 18 der unteren Düsenkästen 16 sind jedoch gegenüber den schrägen Austrittsschlitzen 17, 17a der oberen Düsenkästen 15 in Längsrichtung der Vorrichtung 1 versetzt angeordnet (siehe insbesondere Fig. 3). Diese zuletzt erläuterte Anordnung führt in äußerst günstiger Weise dazu, daß das Textilgut 3 bei seinem Transport durch jede Aufblastrocknungszone 7, 9, 11, 13 in stetem Wechsel vom zugehörigen Tragband 4, 5 abgehoben und gegen dieses Tragband 4, 5 gedrückt wird, die Aufblastrocknungszonen also etwa wellenförmig durchläuft.In contrast to this, the nozzle boxes 16 of the lower group of each inflation drying zone have hot air outlet slots 18 directed approximately perpendicular to the carrier tape 4 or 5. However, these outlet slots 18 of the lower nozzle boxes 16 are arranged offset in the longitudinal direction of the device 1 with respect to the oblique outlet slots 17, 17a of the upper nozzle boxes 15 (see in particular FIG. 3). This last-explained arrangement leads in an extremely favorable manner to the fact that the textile material 3 is lifted and pressed against this carrier belt 4, 5 during its transport through each inflation drying zone 7, 9, 11, 13 in constant alternation from the associated carrier belt 4, 5, the inflation drying zones So it runs through in waves.

Der Vorteil der schräg gegen das Tragband 4, 5 bzw. das darauf befindliche Textilgut 3 gerichteten Austrittsschlitze 17 liegt in einer Stabilisierung des Textilgutes 3 während seines Transports (auch wenn es sich dabei um mehrbaniges Textilgut handelt), während der Vorteil des unter dem flacheren Winkel IX gerichteten Austrittsschlitze 17a des jeweils ersten Düsenkastens 15 darin liegt, daß ein Längseinrollen des Textilgutes 3 bei neu einlaufenden Waren verhindert wird. Dabei ist es ferner zweckmäßig, unter diesen ersten oberen Düsenkästen 15 (mit dem flach geneigten Austrittsschlitz 17a) keinen nach oben ausblasenden unteren Düsenkasten 16 vorzusehen. Die aus den oberen und unteren Düsenkästen 15, 16 bzw. deren Austrittsschlitzen 17, 17a bzw. 18 austretende Heißluft ist in Fig. 3 durch gestrichelte Pfeile dargestellt.The advantage of the outlet slots 17 directed obliquely against the carrier tape 4, 5 or the textile material 3 located thereon is a stabilization of the textile material 3 during its transport (even if it is multi-lane textile material), while the advantage of the at the flatter angle IX directed outlet slots 17a of the first nozzle box 15 lies in that a longitudinal curling of the textile goods 3 is prevented when new goods arrive. It is furthermore expedient not to provide any lower nozzle box 16 which blows out upwards under these first upper nozzle boxes 15 (with the flatly inclined outlet slot 17a). The hot air emerging from the upper and lower nozzle boxes 15, 16 and their outlet slots 17, 17a and 18 is shown in FIG. 3 by dashed arrows.

Um zu verhindern, daß das Textilgut 3 während seines Transports unterhalb der oberen Düsenkästen 15 jeder Aufblastrocknungszone 7, 9, 11, 13 an den Unterseiten dieser Düsenkästen 15 schleift, abgebremst oder evtl. abgeleitet wird, ist dicht unterhalb jeder oberen Düsenkastengruppe jeweils eine Anzahl von sich in Bewegungsrichtung des Textilgutes 3 erstrekkenden, reibungsarmen Leitelementen 19 angeordnet (vgl. Fig. 3). Bei diesen Leitelementen 19 kann es sich um schmale Bänder, Schnüre, Drähte oder ähnliche Elemente handeln, die aus reibungsarmem Material bestehen oder mit einem solchen beschichtet sind und die mit ausreichendem Abstand voneinander (in Querrichtung der Vorrichtung 1 betrachtet) angeordnet sind, so daß die aus den oberen Düsenkästen 15 in Richtung auf das Textilgut 3 austretende Heißluft ohne wesentliche Beeinträchtigung dort hindurchströmen kann.In order to prevent the textile material 3 from being grinded, braked or possibly diverted on the undersides of these nozzle boxes 15 during transport below the upper nozzle boxes 15 of each inflation drying zone 7, 9, 11, 13, a number of is located just below each upper nozzle box group arranged in the direction of movement of the textile material 3, low-friction guide elements 19 (see FIG. 3). These guide elements 19 can be narrow tapes, cords, wires or similar elements which consist of or are coated with low-friction material and which are arranged at a sufficient distance from one another (viewed in the transverse direction of the device 1), so that the hot air escaping from the upper nozzle boxes 15 in the direction of the textile material 3 can flow through there without significant impairment.

Auch die Saugtrocknungszonen 8, 10, 12, 14 sind im wesentlichen gleichartig ausgebildet. Im Gegensatz zu den Aufblastrocknungszonen 7, 9, 11, 13 befindet sich in jeder dieser Saugtrocknungszonen lediglich unter dem Tragband 4 bzw. 5 ein ebenfalls über die ganze Textilgutbreite reichender Unterdruckkasten 20 (gegebenenfalls können selbstverständlich auch mehrere solcher Unterdruckkästen in jeder Saugtrocknungszone angeordnet sein). Jeder Unterdruckkasten 20 weist auf seiner gegen das Tragband 4 bzw. 5 gerichteten Oberseite 20a eine geeignete Perforation auf und erstreckt sich in Längsrichtung der Vorrichtung 1 nahezu über die ganze wirksame Länge der zugehörigen Saugtrocknungszone.The suction drying zones 8, 10, 12, 14 are also essentially of the same design. In contrast to the inflation drying zones 7, 9, 11, 13, in each of these suction drying zones there is only a vacuum box 20, which also extends over the entire width of the fabric, under the carrying belt 4 or 5 (if necessary, several such vacuum boxes can of course also be arranged in each suction drying zone). Each vacuum box 20 has a suitable perforation on its upper side 20a directed against the carrier tape 4 or 5 and extends in the longitudinal direction of the device 1 almost over the entire effective length of the associated suction drying zone.

Ein besonders zweckmäßiger Aufbau der Vorrichtung 1 ergibt sich aus der Querschnittsdarstellung in Fig. 2. Wie bereits weiter oben erwähnt worden ist, bilden zwei übereinander liegende Trocknungszonen mit unterschiedlicher Luftführung jeweils einen Trocknungsabschnitt. In Fig. 2 wird der Trocknungsabschnitt durch die oben liegende Saugtrocknungszone 8 und die darunter liegende Aufblastrocknungszone 13 gebildet. Jedem Trocknungsabschnitt der Vorrichtung 1 ist nun ein einziger Umluftventilator (z. B. 21 in Fig. 2) in der Weise zugeordnet, daß die beiden übereinander liegenden Trocknungszonen (obere Saugtrocknungszone 8 und untere Aufblastrocknungszone 13) nacheinander von demselben Heißluftstrom (gestrichelte Pfeile 22) durchsetzt werden. Der Ansaugseite des Ventilators 21 ist dabei zweckmäßig noch ein geeigneter Wärmetauscher 23 üblicher Ausführung vorgeschaltet. In jedem Trocknungsabschnitt kann außerdem in üblicher Weise ein Teil der Umluft über einen Rohranschluß 24 und über eine Sammelleitung 25 (gemeinsam für alle Trocknungsabschnitte) abgeleitet werden, während ein entsprechender Anteil Frischluft neu eingeleitet wird (was nicht näher veranschaulicht ist).A particularly expedient structure of the device 1 results from the cross-sectional illustration in FIG. 2. As has already been mentioned above, two drying zones lying one above the other, each with a different air flow, form a drying section. 2, the drying section is formed by the suction drying zone 8 lying above and the inflation drying zone 13 lying underneath. Each drying section of the device 1 is now assigned a single circulating air fan (for example 21 in FIG. 2) in such a way that the two drying zones lying one above the other (upper suction drying zone 8 and lower inflation drying zone 13) are successively from the same hot air stream (dashed arrows 22) be enforced. A suitable heat exchanger 23 of conventional design is expediently connected upstream of the suction side of the fan 21. In each drying section In addition, a part of the circulating air can be discharged in the usual way via a pipe connection 24 and via a manifold 25 (common for all drying sections), while a corresponding proportion of fresh air is newly introduced (which is not illustrated in more detail).

Damit über die Länge der Vorrichtung 1 eine möglichst gleichmäßige Trocknungsbehandlung erfolgen kann, ist es ferner zweckmäßig, den Umluftventilator von in Längsrichtung der Vorrichtung 1 einander benachbarten Trocknungsabschnitten abwechselnd auf der einen oder der anderen Vorrichtungslängsseite anzuordnen (in Fig.2 ist der Ventilator 21 auf der linken Längsseite angeordnet).So that the most uniform drying treatment can be carried out over the length of the device 1, it is also expedient to alternately arrange the circulating air fan from drying sections adjacent to one another in the longitudinal direction of the device 1 on one or the other side of the device (in FIG. 2, the fan 21 is on the side arranged on the left long side).

Im Hinblick auf die Schlilderung der Wirkungsweise des in Fig. veranschaulichten Trocknungsabschnittes der Vorrichtung 1 sei noch erwähnt, daß in den in Längsrichtung der Vorrichtung 1 benachbarten Trocknungsabschnitten (z. B. mit Trocknungszonen 7/14 und 9/12) selbstverständlich die Ansaugseite des zugehörigen Umluftventilators mit den Unterdruckkästen 20 und die Druckseite des Ventilators mit den oberen und unteren Düsenkästen 15, 16 der in der oberen Etage angeordneten Aufblastrocknungszonen verbunden ist.With regard to the description of the mode of operation of the drying section of the device 1 illustrated in FIG. 1, it should also be mentioned that in the drying sections adjacent in the longitudinal direction of the device 1 (e.g. with drying zones 7/14 and 9/12), of course, the suction side of the associated one Recirculating air fan with the vacuum boxes 20 and the pressure side of the fan with the upper and lower nozzle boxes 15, 16 of the inflation drying zones arranged on the upper floor is connected.

Während anhand der Fig. 1 und 2 eine Ausführungsform der Heißluft-Trocknungsvorrichtung geschildert worden ist, bei der die unterschiedlichen Trocknungszonen in zwei übereinander liegenden Trocknungsetagen angeordnet sind, ist es selbstverständlich auch möglich, die Trocknungszonen nur in einer einzigen Trocknungsetage hintereinander vorzusehen, wobei in dieser Etage dann nur ein einziges, durchlaufendes Tragband erforderlich ist. Eine solche Ausführungsform dürfte ohne zeichnerische Darstellung verständlich sein, da im Hinblick auf Fig. 1 beispielsweise lediglich die obere oder untere Trocknungsetage wegfallen würde.While an embodiment of the hot air drying device has been described with reference to FIGS. 1 and 2, in which the different drying zones are arranged in two drying levels lying one above the other, it is of course also possible to provide the drying zones in succession only in one drying level, in which Then only a single, continuous conveyor belt is required. Such an embodiment should be understandable without a graphic representation, since with regard to FIG. 1, for example, only the upper or lower drying level would be omitted.

Schließlich sei auch noch ausdrücklich erwähnt, daß auch eine andere Reihenfolge und/oder Anzahl der unterschiedlich mit Heißluft beaufschlagten Trocknungszonen vorgesehen sein könnte, falls dies für eine besondere Trocknung von Textilgut wünschenswert wäre.Finally, it should also be expressly mentioned that a different sequence and / or number of the drying zones which are subjected to different amounts of hot air could also be provided if this would be desirable for a special drying of textile goods.

Darüber hinaus kann es in vielen Fällen (beispielsweise wenn das Textilgut besonders stark erwärmt worden ist) besonders vorteilhaft sein, die letzte vom Textilgut durchlaufende Trocknungszone mit einer Einrichtung zum Einführen von kühler Frischluft auszustatten, um hier inbesondere eine Abkühlung des aus der Vorrichtung herauslaufenden Textilgutes zu erzielen. Eine solche Möglichkeit ist in Fig. 1 bei der Trocknungszone 14 angedeutet. Diese letzte vom Textilgut 3 durchlaufende Trocknungszone ist dabei zweckmäßig als Saugtrocknungszone 14 ausgebildet.In addition, it can be particularly advantageous in many cases (for example if the textile material has been heated particularly strongly) to equip the last drying zone passing through the textile material with a device for introducing cool fresh air in order in particular to cool the textile material running out of the device achieve. Such a possibility is indicated in FIG. 1 in the drying zone 14. This last drying zone passing through the textile material 3 is expediently designed as a suction drying zone 14.

Der dieser Saugtrocknungszone 14 zugeordnete Ventilator (nicht dargestellt) saugt dabei nicht nur Umluft aus dem Inneren des Vorrichtungsgehäuses 6 an, sondern zu einem beträchtlichen Teil auch kühle Frischluft, um die gewünschte Abkühlung des Textilgutes 3 herbeiführen zu können. Zu diesem Zweck ist eine entsprechende Einrichtung vorgesehen, die im wesentlichen eine über die ganze Arbeitsbreite (senkrecht zur Zeichenebene der Fig. 1) der Vorrichtung 1 reichende Ansaughaube 26 sowie ein in der Stirnseite 1 der Vorrichtung 1 bzw. des Gehäuses 6 eingebautes Siebblech 27 enthält. Die Ansaughaube 26 verläuft von der Stirnseite 1a der Vorrichtung 1, also vom Siebblech 27 aus in Längsrichtung der Vorrichtung 1 geneigt in Richtung auf das Textilgut 3, wobei diese Ansaughaube 26 etwa die gleiche Länge besitzt wie diese Saugtrocknungszone 14. Auf diese Weise wird in dieser Saugtrocknungszone 14 zugeführte kühle Frischluft (Pfeile 28) mit warmer Umluft (Pfeile 29) vermischt, so daß das Textilgut 3 von dieser Mischluft durchströmt und dabei in günstiger Weise abgekühlt wird. Gleichzeitig wird dadurch die Temperatur der Mischluft erhöht, bevor eine endgültige Aufheizung der Umluft in üblicher Weise mit Hilfe des dem Ventilator zugeordneten Wärmetauschers erfolgt. Durch die Ansaughaube 26 und das Siebblech 27 kann somit kontinuierlich ausreichend trockene und kühle Frischluft in das gesamte Umluftsystem der Vorrichtung 1 eingebracht werden.The fan (not shown) assigned to this suction drying zone 14 not only sucks in circulating air from the interior of the device housing 6, but also cool fresh air to a considerable extent in order to be able to bring about the desired cooling of the textile material 3. For this purpose, a corresponding device is provided which essentially contains a suction hood 26 extending over the entire working width (perpendicular to the plane of the drawing in FIG. 1) of the device 1 and a screen plate 27 installed in the end face 1 of the device 1 or the housing 6 . The suction hood 26 runs from the end face 1a of the device 1, that is to say from the sieve plate 27, in the longitudinal direction of the device 1, inclined in the direction of the textile material 3, this suction hood 26 having approximately the same length as this suction drying zone 14 Suction drying zone 14 supplied cool fresh air (arrows 28) mixed with warm circulating air (arrows 29), so that the textile material 3 flows through this mixed air and is cooled in a favorable manner. At the same time, the temperature of the mixed air is increased before the circulating air is finally heated up in the usual way with the aid of the heat exchanger assigned to the fan. Sufficiently dry and cool fresh air can thus be continuously introduced into the entire air circulation system of the device 1 through the suction hood 26 and the sieve plate 27.

In gleicher Weise wie zuvor beschrieben könnte natürlich auch bei einer Trocknungsvorrichtung mit nur einer Etage die letzte Trocknungszone ausgebildet sein. Falls also in Fig. 1 lediglich die obere Etage vorhanden wäre, dann wäre dort die Saugtrocknungszone 10 die letzte vom Textilgut durchlaufende Trocknungszone und dementsprechend mit Einrichtungen zum Einführen der kühlen Frischluft ausgestattet.In the same way as described above, the last drying zone could of course also be formed in a drying device with only one floor. If only the upper floor were present in FIG. 1, then the suction drying zone 10 would be the last drying zone passing through the textile material and would accordingly be equipped with devices for introducing the cool fresh air.

Claims (7)

1. Apparatus for hot air drying of continuously moving textile material, with at least one perforated conveyor belt transporting the textile material through a plurality of drying zones and with means for supplying hot air to the textile material, in which in at least one blast drying zone nozzle casings for supplying air and means for extracting air are located both on the upper and on the lower side of the conveyor belt, so that in the form of a convective flow on both sides the hot air comes into contact with the textile material lying loosely in the conveyor belt in this blast drying zone, whilst in at least one suction drying zone the means for supplying air are arranged above the conveyor belt and the means for extracting air are arranged below the conveyor belt, so that in this suction drying zone the hot air flows through the textile material and the textile material is pressed onto the conveyor belt, characterised in that the upper nozzle casings (15) of each blast drying zone (7, 9, 11, 13) have hot air outlet slots (17, 17a) inclined towards the textile material (3) in the direction of transport of the textile material, and - viewed in the direction of transport (2) of the textile material - the outlet slot (17a) of the first upper nozzle casing (15) in each case of a blast drying zone is inclined at a angle (α) of 10 to 20° relative to the horizontal, whilst the outlet slots (17) of the other upper nozzle casings (15) form an angle (ß) of 45 to 75° with the horizontal.
2. Apparatus as claimed in claim 1, characterised in that - viewed in the direction of transport of the textile material - the first lower nozzle casing (16) of each blast drying zone (7, 9, 11, 13) is arranged below the second upper nozzle casing (15).
3. Apparatus as claimed in claim 1, characterised in that the lower nozzle casings (16) of each blast drying zone (7, 9, 11, 13) have hot air outlet slots (18) which are directed at right angles to the conveyor belt (4, 5) and are arranged offset relative to the inclined outlet slots (17) of the upper nozzle casings (15) in the longitudinal direction of the apparatus.
4. Apparatus as claimed in claim 1, characterised in that the drying zones (7 to 14) are provided in two drying levels which lie one above the other and through which the textile material (3) passes one after the other, each of the two levels being provided with a continous conveyor belt (4, 5), and in each case one blast drying zone and one suction drying zone of both levels lie one above the other and form a drying section.
5. Apparatus as claimed in claim 4, characterised in that each drying (e. g. 8, 13) is provided with its own circulating fan (21) with a heat exchanger so that the same hot air current (22) flows in succession through the two drying zones (e. g. 8,13) lying one above the other.
6. Apparatus as claimed in claim 5, characterised in that the circulating fan (21) of drying sections lying adjacent to one another in the longitudinal direction of the apparatus (1) is arranged alternately on one and the other long side of the apparatus.
7. Apparatus as claimed in claim 1, characterised in that the last drying zone through which the textile material (3) passes is constructed as a suction drying zone (14) and is equipped with means (26, 27) for introducing cool fresh air (28) extending over the whole working width of the apparatus (1).
EP81109658A 1981-04-28 1981-11-12 Apparatus for hot-air drying of textile materials Expired EP0063642B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813116838 DE3116838A1 (en) 1981-04-28 1981-04-28 DEVICE FOR HOT-AIR DRYING OF TEXTILE GOODS
DE3116838 1981-04-28

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EP0063642A1 EP0063642A1 (en) 1982-11-03
EP0063642B1 true EP0063642B1 (en) 1983-11-09

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Publication number Priority date Publication date Assignee Title
DE3727280A1 (en) * 1987-08-16 1989-03-02 Brueckner Trockentechnik Gmbh DEVICE FOR HEAT TREATMENT OF A TRACK
DE8910019U1 (en) * 1989-08-21 1990-12-20 Hänsel Textil GmbH & Co, 58636 Iserlohn DEVICE FOR THE PRODUCTION OF PLASTIC FILMS WITH GRID-PRINTED ADHESIVE POINTS
DE4131636C2 (en) * 1991-09-23 1999-04-22 Brueckner Trockentechnik Gmbh Belt dryer for hot air treatment of a wide textile web
DE19546344A1 (en) * 1995-12-12 1997-06-19 Babcock Textilmasch Device for the heat treatment of continuous material webs
WO2012033728A1 (en) 2010-09-10 2012-03-15 Megtec Systems, Inc. Air bar arrangement for drying tissue on a belt
DE102013223150A1 (en) * 2013-11-13 2015-05-28 Sandvik Materials Technology Deutschland Gmbh Dryers and methods for drying sheetlike materials

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Publication number Priority date Publication date Assignee Title
GB777250A (en) * 1952-10-08 1957-06-19 Svenska Flaektfabriken Ab Improved apparatus for supporting and conveying web-like materials
DE1211478B (en) * 1959-04-23 1966-02-24 Haas Friedrich Maschf Dryer for pulp webs coming from the wet end
FR1282869A (en) * 1961-02-23 1962-01-27 Fr Drabert Sohne Maschinenfabr Drying installation, in particular for drying fabrics
GB1242455A (en) * 1967-08-26 1971-08-11 Friedrich Haas Gmbh Maschf A textile material drying apparatus
US3559301A (en) * 1968-07-29 1971-02-02 Egan Machinery Co Air flotation system for conveying web materials
DE1951625A1 (en) * 1969-10-14 1971-04-29 Friedrich Haas Gmbh & Co Masch Tricot fabric drying plant
DE2301938A1 (en) * 1973-01-16 1974-07-25 Brueckner Apparatebau Gmbh METHOD AND DEVICE FOR HOT-AIR DRYING OF A WET-TREATED PRODUCT WEB
DE2320481C2 (en) * 1973-04-21 1982-11-11 Vepa AG, 4125 Riehen, Basel Textile heat treatment device, in particular tenter frames
IT1084101B (en) * 1977-06-08 1985-05-25 Essico S R L CONTINUOUS DRIER FOR FABRICS

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DE3116838A1 (en) 1982-11-11
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