EP0130579B1 - Apparatus for the continuous heat treatment, e.g. drying, of webs or ribbons of textile material - Google Patents

Apparatus for the continuous heat treatment, e.g. drying, of webs or ribbons of textile material Download PDF

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Publication number
EP0130579B1
EP0130579B1 EP84107497A EP84107497A EP0130579B1 EP 0130579 B1 EP0130579 B1 EP 0130579B1 EP 84107497 A EP84107497 A EP 84107497A EP 84107497 A EP84107497 A EP 84107497A EP 0130579 B1 EP0130579 B1 EP 0130579B1
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EP
European Patent Office
Prior art keywords
suction
air
box
ventilator
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
EP84107497A
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German (de)
French (fr)
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EP0130579A3 (en
EP0130579A2 (en
Inventor
Heinz Dr. Fleissner
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Truetzschler Nonwovens GmbH
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Fleissner GmbH
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Filing date
Publication date
Priority claimed from DE19833323827 external-priority patent/DE3323827A1/en
Priority claimed from DE19833327064 external-priority patent/DE3327064A1/en
Application filed by Fleissner GmbH filed Critical Fleissner GmbH
Publication of EP0130579A2 publication Critical patent/EP0130579A2/en
Publication of EP0130579A3 publication Critical patent/EP0130579A3/en
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Publication of EP0130579B1 publication Critical patent/EP0130579B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/06Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path
    • F26B13/08Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path using rollers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure

Definitions

  • the invention relates to a device as it emerges from the first part of claim 1. It is based on DE-A-21 41 692, which discloses a hot-flue construction. in which the treatment medium remains in contact with the goods over a longer distance without being drawn off laterally along the edges of the web to the fan for the necessary circulation. At the same time it is achieved that with high flow energy with a compact structure this results in an overall energy-saving device.
  • the known device at the ends of the individual running loops extends over the width of the treatment chamber through suction channels, via which the treatment medium which is either supplied above or below via storage ceilings and is blown into the open running loops is suctioned off.
  • a disadvantage of this construction is, in particular, the danger that the treatment air blown into the open running loops at the top and bottom, instead of being led into the open running loops, is at least partially sucked off directly into the adjacent suction channel, i.e. without the height of the respective running loop flow through.
  • This short-circuit air flow along the edges of the web results in a flow that is too small parallel to the web surface along the running loops, so that no effective drying result can be achieved.
  • US-A-20 65 636 which describes an apparatus for the heat treatment of paper.
  • the web is repeatedly passed through an oven by being guided meander shaped manner to f arranged outside the housing pulleys.
  • the treatment medium is fed uniformly at the respective one end of the individual running loops over the width of the treatment chamber, to be precise through pipes extending inside the housing, and is also sucked off at the other end of the respective running loops via pipes arranged inside the housing.
  • the device according to DE-C-688671, in which the web deflection rollers are arranged inside the housing, is more advantageous here.
  • the treatment air is fed through pressure boxes arranged at the ends of the running loops by means of a fan and at least partially fed back to the fan at the opposite ends of the running loops through suction boxes arranged there.
  • Another part of the treatment air flows up through the open loops and is there via a further suction box arranged inside the housing. Fan fed again.
  • the air flow achieved here is also unsatisfactory, since the amount of air that can be supplied through the pressure boxes can only be small due to their construction.
  • an additional plate-like heating device is arranged parallel to the web between the pressure and suction boxes arranged in each case in order to act upon the web with radiation energy and to accelerate the blown-in treatment air by narrowing the flow area.
  • a short-circuit air flow is also avoided in this construction, however an air flow sufficient for quick and uniform drying cannot be achieved.
  • Another disadvantage is the arrangement of the fan with pipes outside the treatment housing and the complex energy supply due to the plate-shaped heating device between the suction and pressure boxes.
  • DE-A-2 508 873 discloses a hot-flue-like construction in which the treatment air is supplied from above and below by the fan to the closed fabric web loops and the air is then extracted internally after flowing through the web.
  • a suction channel is provided across the width of the web, which is closed against the directly flowing air and thus forces the air to flow along and parallel to the web loops.
  • the object of the invention is to find a hot-flue construction with which the total air power and heating energy installed in a closed and thus compact housing can be effectively heat treated with a maximum of air flow can be implemented parallel to the web, also without any edge sequences, color shifts or even uneven drying results across the web width.
  • the invention provides that essentially the entire height between the upper and lower row of rollers and in each area between an upward and downward run of a loop a the essential clear width between the runs, on the one hand blowing and on the other hand
  • Air supply box having suction openings is arranged, which is divided approximately in the middle of the height into the suction box and into a pressure box along the working width. Due to the relatively large volume of the suction and pressure box, a large amount of air can be blown into the running loops will. At the same time, due to the large volume of the air guide boxes between the running loops, there is only a narrow gap between the outer walls of the air guide boxes and the web of material passing them, but through which the supplied air must flow. Due to the narrowing of the cross-section, a high air speed is automatically achieved, which quickly removes the moisture in the goods. However, the latter feature is known from DE-A-2 508 873.
  • the pressure box is followed by an airtight nozzle box along its length, the outlet openings of which are directed at an angle of less than 90 °, preferably 45 °, against the goods in the direction of the outflowing air.
  • This measure has the effect that, in the basically small gap between the runs of the running loops and the air guide boxes, the air flows out of the nozzle boxes in the flow direction, parallel to the web. This immediately affects the parallel air flow and avoids vortices when the air jets hit the web. In this way, despite high air flow, fluttering of the material web and possibly fearing of coloring agents on the wet material web can be avoided.
  • a suction space is arranged in the device along the treatment chamber of a treatment compartment, from which the fan sucks off the treatment air flowing in from the plurality of suction channels. It is important that the fan uniformly acts on all suction boxes in a treatment compartment. To achieve this is the purpose of the suction room.
  • an air baffle also extends longitudinally through the suction space over the height of the fan intake and at a distance from the partition, which also impedes the direct action of the air flow on the directly assigned suction boxes of the running loops arranged opposite. The air must first flow around this baffle so that the suction flow in the compartments is evened out.
  • the baffle can also be omitted if the fan is not at the level of the suction boxes, but z. B. is arranged higher.
  • one embodiment of the invention provides that two groups of two rows of deflection rollers are arranged one above the other within a housing and the fan is arranged in the middle between these roller groups.
  • DE-A-16 35 356 discloses a hot-flue construction with a radial fan in the middle between two spaced rows of rollers around which the web-shaped material is guided in a meandering manner.
  • the fan blows both upwards and downwards in order to inject the treatment air via the heating units, however, into the space between the rollers into the running loop, which is open upwards or downwards, and out of the space between the rollers perpendicular to the transport direction of the web vacuum again. But it is precisely this air flow that results in the feared edge drains.
  • the device according to the invention in which basically two individual hot-flue constructions are supplied with the necessary amount of air with a fan, it is nevertheless possible to work with different temperatures. It is only necessary to subdivide the suction space at the level of the fan axis along the treatment compartment. This means that the upper part of the fan intake only sucks in the air circulated in the upper hot flue. Due to the rotation of the fan and the arrangement of the fan blades, the accelerated air emerges from the fan wheel offset by an angle, but this angle of about 30-45 ° can be taken into account by appropriate partition walls in the fan room so that an exact separation between the upper and lower air is effected. The same applies to the treatment air circulated in the lower hot flue.
  • radiators arranged at the top and bottom in the fan room with separate controllers and, if necessary, with different heating capacities, so that the quantity of web running over the upper roller group is easily treated with air of a different state than that over the lower one Roll group of running web quantity, although only a radial fan is provided to accelerate the air quantity.
  • the device consists of a heat-insulated housing 1, which is divided by a longitudinal wall 2 into a fan chamber 3 and a suction chamber 4 with a subsequent treatment chamber 5.
  • the radial fan 6 is rotatably supported horizontally, the suction pipe 7 of which opens into the suction chamber 4.
  • the suction space 4 is formed by the longitudinal wall 2, a partition 8 and with upper and lower boundary walls (here housing 1 and partition wall 17 '), the Partition 8 divides the suction chamber 4 from the treatment chamber 5.
  • two rows of deflecting rollers 9, 10 are arranged alternately on a gap, so that the web 11 to be treated can be transported in a meandering shape through the length of the device shown in FIG.
  • the z. B. serving for drying and accelerated by the fan 6 treatment air is a total of the arranged above the height of the loops between these air guide boxes 12 and also discharged into them, so that there is no air flow in the region of the deflecting rollers 9, 10 itself.
  • the fan 6 is arranged in the upper region of the housing 1 and puts the suction boxes 13 (-) of the air guide boxes 12, which are also arranged at the top, directly under negative pressure.
  • the fan 6 can also be higher, e.g. B. with an axis at the level of the rollers 9, see below.
  • the treatment air drawn in from the suction boxes 13 collects in total in the suction chamber 4 and is fed from there to the fan 6 uniformly over the width of a treatment compartment.
  • a treatment compartment comprises approximately half the length of the device according to FIG. 1, so that two fans 6 are therefore provided for this length of the device.
  • the treatment air accelerated by the fan 6 flows out downwards and is exhausted by. the heater 14 blown.
  • the pressure area (+) of the air guide boxes 12 connects to this heating device 16. It is formed by a lower wall 17, which divides the respective air guide box 12 approximately in the middle of the height into the suction box 13 and a pressure box 18 (+) lengthways. This partition wall 17 extends with the part 17 'of course also through the suction space 4 in order to completely prevent a short circuit flow.
  • the partition wall 17 between the suction and pressure box of an air guide box 12 is arranged obliquely across the width of the treatment chamber 5, namely the suction box 13 starts narrow and widens towards the fan 6, while conversely the pressure box 18 on the Inflow opening 27 begins narrowly and widens towards the end.
  • This also serves for optimal airflow and utilization of the air volume to be influenced.
  • the air guide boxes 12 are not only dimensioned so that they use the essential clear height between the upper and lower deflecting rollers 9 and 10 to a large volume of air. to be able to record, but they also take up the essential free space between the respective runs from top to bottom and vice versa of the adjacent fabric sections. For the high air flow to be generated parallel to the running direction of the web, only a narrow air gap is left, which is particularly evident from FIG. 3. This narrowing of the air flow space causes a high air speed in this drying area between the deflecting rollers 9, 10.
  • blow-out openings 22 are provided on the side walls 21 of the nozzle boxes, which are inclined by 45 ° and are now oriented upwards at an angle of approximately 45 ° to the goods 11.
  • the blow-out openings 22 are arranged on both sides of the nozzle boxes 20, so that the respective run of a material web is always acted upon on both sides by a strong air flow.
  • Baffles are provided to influence the air flow both in the pressure and in the suction part of the air side boxes 12.
  • a perforated plate 23 is arranged, which is aligned parallel to the partition wall 17 in the area of the nozzle box 20 'beginning.
  • the air openings 19 in the pressure box 18 serve to even out the air flow and to increase the static pressure.
  • a fluff filter 25 is inserted from the end wall of the housing 1 facing away from the fan 6. There, too, an additional perforated plate (25) can influence the air flow ".
  • the treatment air flowing from the suction box 13 into the suction chamber 14 initially impacts against an air baffle plate 26, which is supported on the partition wall 17 'in the suction chamber 4 at a distance from the partition 8, and at the top at the suction openings 24 Air guide box 12 ends.
  • the treatment air sucked in by the fan 6 must first flow around this upper edge of the air baffle plate 26, so that the suction boxes 13 of a treatment compartment are evenly pressurized with a vacuum.
  • Such an additional baffle 26 can be omitted if the fan 6 is not arranged exactly opposite the suction boxes 13, but higher, z. B. at the level of the deflection rollers 9. Although this creates above the rollers 9 a space enclosed by the housing wall 1, but this is favorable for the possibly necessary cleaning of the roller 9.
  • the suction space separated from the longitudinal wall 2 has an upper part 4 'and a lower part 4" with the adjoining treatment chambers 5', 5 "
  • the radial fan 6 is rotatably supported horizontally, the suction pipe 7 of which opens into the suction chambers 4 ', 4 ".
  • the suction chamber 4 ', 4 " is formed by the longitudinal wall 2 and a partition 8 with cover plates arranged at the top and bottom, the partition 8 dividing the suction chamber 4', 4" from the treatment chamber 5 ', 5 ".
  • the outlet is also arranged on the end wall on the inlet side, while on the opposite end wall of the device, the web continues inside the housing from bottom to top to the oppositely running hot flue for finishing.
  • the z. B. serving for drying and accelerated by fan 6 treatment air is a total of the respective height of the loops arranged between these arranged air guide boxes 12 ', 12 "and also discharged into these, so that in the region of the deflecting rollers 9', 9", 10th ', 10 "itself is not an air flow.
  • This has the advantage that the material web is only exposed to the air flow in its freely guided area, but does not cool it down during deflection, since the deflection rollers 9', 9", of course. 10 '. 10 "circulate within the housing 1.
  • the fan 6 is arranged in the middle of the housing 1 and puts the directly assigned upper and lower suction boxes 13 ', 13 "(-) of the air guide boxes 12', 12" directly under negative pressure.
  • the treatment air sucked in from the suction boxes 13 ′, 13 ′′ collects overall in the suction chamber 4 ′, 4 ′′, which is only divided longitudinally by a central partition wall 26, and is fed from there to the fan 6 uniformly over the width of a treatment compartment.
  • a treatment compartment comprises a plurality of rollers arranged side by side. The treatment air accelerated by the fan 6 flows both upwards and downwards and is blown through the heating devices 14 ', 14 ".
  • the regenerated air flows into the subsequent pressure range (+) of the air guide boxes 12 ', 12 ". It is formed by a partition wall 17', 17", which the respective air guide box 12 ', 12 “approximately in the middle of the height into the suction box 13', 13" (-) and Pressure box 18 ', 18 “(+) divided longitudinally.
  • This partition wall 17', 17” extends with the part “'of course also through the associated suction space 4', 4" to prevent a short sole flow.
  • the air guide boxes 12 ', 12 are not only dimensioned such that they use the essential clear height between the upper and lower deflecting rollers 9', 9" and 10 ', 10 "to be able to accommodate a large volume of air, but they also take the essential free space between the respective runs from top to bottom and vice versa of the adjacent sections of the web.
  • a narrow air gap is left, which is particularly apparent from Fig. 3 after the main application. This narrowing of the air flow space causes a high air speed in this drying area between the deflecting rollers 9 ', 9 ", 10', 10".
  • the partition 26 is arranged in the suction space at the level of the fan axis. This enables different treatment of the z. B. below wet incoming web compared to the treatment section which is now transported after drying up and requires less heating energy there, and where less moist air should be circulated. Accordingly, the heating devices should be equipped with separate controllers and, if necessary, different heating outputs. Separate air blows must also be installed for the upper and lower hot flue.

Description

Die Erfindung betrifft eine Vorrichtung, wie sie aus dem ersten Teil des 1. Patentanspruchs hervorgeht. Sie geht dabei aus von der DE-A-21 41 692, die eine Hotflue-Konstruktion offen- 'bart. bei der das Behandlungsmedium über eine längere Strecke mit der Ware in Kontakt bleibt, ohne für den notwendigen Kreislauf seitlich entlang der Warenbahnkanten zum Ventilator abgezogen zu werden. Gleichzeitig wird erreicht, daß mit hoher Strömungsenergie bei kompaktem Aufbau dies insgesamt eine energiesparende Vorrichtung ergibt. Dazu weist die vorbekannte Vorrichtung an den Enden der einzelnen Laufschlaufen über die Breite der Behandlungskammer sich erstreckende Saugkanäle auf, über die das entweder oben oder unten über Staudecken zugeführte, in die jeweils offenen Laufschlaufen eingeblasene Behandlungsmedium abgesaugt wird. Nachteilig an dieser Konstruktion ist insbesondere die Gefahr, daß die jeweils oben und unten in die offenen Laufschlaufen eingeblasene Behandlungsluft, statt in die offenen Laufschlaufen geführt zu werden, gleich in den jeweils benachbarten Saugkanal zumindest teilweise abgesaugt wird, also ohne die Höhe der jeweiligen Laufschlaufe zu durchströmen. Diese Kurzschlußluftströmung entlang der Kanten der Warenbahn hat eine zu geringere Strömung parallel zur Warenbahnfläche entlang der Laufschlaufen zur Folge, so daß kein effektives Trockenergebnis erzielt werden kann.The invention relates to a device as it emerges from the first part of claim 1. It is based on DE-A-21 41 692, which discloses a hot-flue construction. in which the treatment medium remains in contact with the goods over a longer distance without being drawn off laterally along the edges of the web to the fan for the necessary circulation. At the same time it is achieved that with high flow energy with a compact structure this results in an overall energy-saving device. For this purpose, the known device at the ends of the individual running loops extends over the width of the treatment chamber through suction channels, via which the treatment medium which is either supplied above or below via storage ceilings and is blown into the open running loops is suctioned off. A disadvantage of this construction is, in particular, the danger that the treatment air blown into the open running loops at the top and bottom, instead of being led into the open running loops, is at least partially sucked off directly into the adjacent suction channel, i.e. without the height of the respective running loop flow through. This short-circuit air flow along the edges of the web results in a flow that is too small parallel to the web surface along the running loops, so that no effective drying result can be achieved.

Als weiterer Stand der Technik in diesem Zusammenhang ist die US-A-20 65 636 zu nennen, die eine Vorrichtung zum Wärmebehandeln von Papier beschreibt. Dort wird die Bahn mehrfach durch einen Ofen geleitet, indem sie um außerhalb des Gehäuses angeordnete Umlenkrollen mäanderförmig geführt ist. Das Behandlungsmedium wird an dem jeweiligen einen Ende der einzelnen Laufschlaufen über die Breite der Behandlungskammer gleichmäßig zugeführt, und zwar durch sich innerhalb des Gehäuses erstreckende Rohre, und am anderen Ende der jeweiligen Laufschlaufen ebenfalls über innerhalb des Gehäuses angeordnete Rohre abgesaugt. Abgesehen davon, daß die Warenbahn durch das Umlenken außerhalb des Ofens jeweils abgekühlt wird, was dort durch Zuführung von Kaltluft sogar bezweckt ist, ist auch bei dieser Konstruktion eine hohe Luftströmung mit großem Luftvolumen entlang den auf- und abwärts laufenden Trums einer Laufschlaufe nicht möglich, wenn auch mit dieser Konstruktion eine Kurzschlußluftströmmung vermieden ist.Another prior art in this connection is US-A-20 65 636, which describes an apparatus for the heat treatment of paper. There, the web is repeatedly passed through an oven by being guided meander shaped manner to f arranged outside the housing pulleys. The treatment medium is fed uniformly at the respective one end of the individual running loops over the width of the treatment chamber, to be precise through pipes extending inside the housing, and is also sucked off at the other end of the respective running loops via pipes arranged inside the housing. In addition to the fact that the web is cooled by the deflection outside the furnace, which is even the purpose of supplying cold air there, a high air flow with a large volume of air along the up and down runs of a loop is also not possible with this construction, if a short-circuit air flow is avoided even with this construction.

Vorteilhafter ist hier die Vorrichtung nach der DE-C-688671, bei der die Warenbahnumlenkrollen innerhalb des Gehäuses angeordnet sind. Auch dort wird die Behandlungsluft durch an den Enden der Laufschlaufen angeordnete Druckkästen mittels eines Ventilators zugeführt und zumindest teilweise an den gegenüberliegenden Enden der Laufschlaufen durch dort angeordnete Saugkästen dem Ventilator wieder zugeführt. Ein anderer Teil der Behandlungsluft strömt durch die nach oben offenen Laufschlaufen nach oben ab und wird dort über einen weiteren innerhalb des Gehäuses angeordneten Saugkasten dem . Ventilator wieder zugeführt. Auch die hier erzielte Luftströmung ist unzufriedenstellend, da die durch die Druckkästen zuführbare Luftmenge aufgrund deren Konstruktion nur gering sein kann. Offensichtlich um diesen Nachteil zu beheben, ist zwischen den oben und unten jeweils angeordneten Druck- und Saugkästen eine zusätzliche plattenähnliche Heizeinrichtung parallel der Warenbahn angeordnet, um mittels Strahlungsenergie die Warenbahn zu beaufschlagen und durch die Verengung des Strömungsbereichs eine Beschleunigung der eingeblasenen Behandlungsluft zu erzielen. Auch bei dieser Konstruktion ist eine Kurzschlußluftführung vermieden, jedoch ist eine zum schnellen und gleichmäßigen Trocknen ausreichende Luftführung nicht erzielbar. Nachteilig ist auch die Anordnung des Ventilators mit Rohrleitungen außerhalb des Behandlungsgehäuses und die aufwendige Energiezuführung durch die plattenförmige Heizeinrichtung zwischen den Saug- und Druckkästen.The device according to DE-C-688671, in which the web deflection rollers are arranged inside the housing, is more advantageous here. Here too, the treatment air is fed through pressure boxes arranged at the ends of the running loops by means of a fan and at least partially fed back to the fan at the opposite ends of the running loops through suction boxes arranged there. Another part of the treatment air flows up through the open loops and is there via a further suction box arranged inside the housing. Fan fed again. The air flow achieved here is also unsatisfactory, since the amount of air that can be supplied through the pressure boxes can only be small due to their construction. Obviously, in order to remedy this disadvantage, an additional plate-like heating device is arranged parallel to the web between the pressure and suction boxes arranged in each case in order to act upon the web with radiation energy and to accelerate the blown-in treatment air by narrowing the flow area. A short-circuit air flow is also avoided in this construction, however an air flow sufficient for quick and uniform drying cannot be achieved. Another disadvantage is the arrangement of the fan with pipes outside the treatment housing and the complex energy supply due to the plate-shaped heating device between the suction and pressure boxes.

Zu erwähnen ist noch die DE-A-2 508 873, die eine Hotflue-ähnliche Konstruktion offenbart, bei der den jeweils geschlossenen Warenbahnschlaufen die Behandlungsluft durch den Ventilator von oben und unten zugeführt und die Luft nach Durchströmung der Warenbahn dann innen abgesaugt wird. Dazu ist ein Absaugkanal über die Breite der Warenbahn vorgesehen, der gegen die direkt zuströmende Luft geschlossen ist und insofern die Luft zum Strömen entlang und parallel der Warenbahnschlaufen zwingt.Also to be mentioned is DE-A-2 508 873, which discloses a hot-flue-like construction in which the treatment air is supplied from above and below by the fan to the closed fabric web loops and the air is then extracted internally after flowing through the web. For this purpose, a suction channel is provided across the width of the web, which is closed against the directly flowing air and thus forces the air to flow along and parallel to the web loops.

Ausgehend von der Vorrichtung nach der DE-A-21 41 692 liegt der Erfindung die Aufgabe zugrunde, eine Hotflue-Konstruktion zu finden, mit der die in einem geschlossenen und damit kompakten Gehäuse insgesamt installierte Luftleistung und Heizenergie in ein effektives Wärmebehandeln mit maximal hoher Luftströmung parallel zur Warenbahn umgesetzt werden kann, und zwar ebenfalls ohne jegliche Kantenabläufe, Farbverschiebungen oder sogar ungleichmäßige Trockenergebnisse über die Warenbahnbreite.Based on the device according to DE-A-21 41 692, the object of the invention is to find a hot-flue construction with which the total air power and heating energy installed in a closed and thus compact housing can be effectively heat treated with a maximum of air flow can be implemented parallel to the web, also without any edge sequences, color shifts or even uneven drying results across the web width.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß im wesentlichen die ganze Höhe zwischen der oberen und der unteren Walzenreihe und in jedem Bereich zwischen einem aufwärts und abwärts laufenden Trum einer Laufschlaufe ein die wesentliche lichte Breite zwischen den Trums einnehmender, einerseits Ausblas- und andererseits Saugöffnungen aufweisender Luftzuführungskasten angeordnet ist, der etwa in der Mitte der Höhe in den Saugkasten und in einen Druckkasten über die Arbeitsbreite längs unterteilt ist. Aufgrund,des im Verhältnis großen Volumens des Saug- und Druckkastens kann eine große Luftmenge in die Laufschlaufen geblasen werden. Gleichzeitig ist durch das große Volumen der Luftführungskästen zwischen den Laufschlaufen nur noch ein schmaler Spalt zwischen den Außenwandungen der Luftführungskästen und der daran vorbeigeführten Warenbahn vorhanden, durch den aber die zugeführte Luft strömen muß. Aufgrund der Querschnittverengung ist automatisch eine hohe Luftgeschwindigkeit erzielt, die einen schnellen Abtransport der Warenfeuchtigkeit bewirkt. Letzteres Merkmal ist jedoch aus der DE-A-2 508 873 bekannt.To achieve this object, the invention provides that essentially the entire height between the upper and lower row of rollers and in each area between an upward and downward run of a loop a the essential clear width between the runs, on the one hand blowing and on the other hand Air supply box having suction openings is arranged, which is divided approximately in the middle of the height into the suction box and into a pressure box along the working width. Due to the relatively large volume of the suction and pressure box, a large amount of air can be blown into the running loops will. At the same time, due to the large volume of the air guide boxes between the running loops, there is only a narrow gap between the outer walls of the air guide boxes and the web of material passing them, but through which the supplied air must flow. Due to the narrowing of the cross-section, a high air speed is automatically achieved, which quickly removes the moisture in the goods. However, the latter feature is known from DE-A-2 508 873.

Mit Vorteil schließt sich an den Druckkasten ein Düsenkasten über seine Länge luftdicht an, dessen Ausblasöffnungen unter einem Winkel kleiner als 90°, vorzugsweise 45°, gegen die Ware in Richtung zur abströmenden Luft gerichtet sind. Diese Maßnahme bewirkt, daß in dem im Grunde geringen Spalt zwischen den Trums der Laufschlaufen und den Luftführungskästen die Luft in Strömungsrichtung, parallel zur Warenbahn gerichtet, aus den Düsenkästen ausströmt. Damit wird sogleich die parallele Luftströmung beeinflußt und Wirbel beim Auftreffen der Luftstrahlen auf die Warenbahn vermieden. Somit kann trotz hoher Luftströmung ein Flattern der Warenbahn und ein ev. zu befürchtendes Verblasen von Farbstoffen auf der naß zugeführten Warenbahn vermieden werden.Advantageously, the pressure box is followed by an airtight nozzle box along its length, the outlet openings of which are directed at an angle of less than 90 °, preferably 45 °, against the goods in the direction of the outflowing air. This measure has the effect that, in the basically small gap between the runs of the running loops and the air guide boxes, the air flows out of the nozzle boxes in the flow direction, parallel to the web. This immediately affects the parallel air flow and avoids vortices when the air jets hit the web. In this way, despite high air flow, fluttering of the material web and possibly fearing of coloring agents on the wet material web can be avoided.

Zum Abführen der in die Saugkästen einströmenden Behandlungsluft ist bei der Vorrichtung entlang der Behandlungskammer eines Behandlungsabteiles ein Saugraum angeordnet, von dem aus der Ventilator die aus der Vielzahl der Saugkanäle zuströmende Behandlungsluft absaugt. Wichtig ist, daß der Ventilator alle Saugkästen eines Behandlungsabteiles gleichmäßig beaufschlagt. Dies zu erreichen, ist Zweck des Saugraumes. Mit Vorteit erstreckt sich dazu weiterhin längs durch den Saugraum über die Höhe des Ventilatoransaugstutzens und mit Abstand zur Trennwand ein Luftprallblech, das die unmittelbare Beaufschlagung der Luftströmung auch auf die direkt zugeordneten Saugkästen der gegenüberliegend angeordneten Laufschlaufen behindert. Zunächst ist dieses Prallblech von der Luft zu umströmen, so daß eine Vergleichmäßigung der Saugströmung in den Abteilen bewirkt ist. Das Prallblech kann auch entfallen, wenn der Ventilator nicht in Höhe der Saugkästen, sondern z. B. höher angeordnet ist.In order to discharge the treatment air flowing into the suction boxes, a suction space is arranged in the device along the treatment chamber of a treatment compartment, from which the fan sucks off the treatment air flowing in from the plurality of suction channels. It is important that the fan uniformly acts on all suction boxes in a treatment compartment. To achieve this is the purpose of the suction room. For this purpose, an air baffle also extends longitudinally through the suction space over the height of the fan intake and at a distance from the partition, which also impedes the direct action of the air flow on the directly assigned suction boxes of the running loops arranged opposite. The air must first flow around this baffle so that the suction flow in the compartments is evened out. The baffle can also be omitted if the fan is not at the level of the suction boxes, but z. B. is arranged higher.

Zur Erzielung eines hohen Behandlungsergebnisses mit wenig zugeführter Energie bei gleichzeitig verhältnismäßig kleiner Vorrichtung ist in Ausgestaltung der Erfindung vorgesehen, daß innerhalb eines Gehäuses zwei Gruppen von je zwei Reihen der Umlenkwalzen übereinander angeordnet und der Ventilator in der Mitte zwischen diesen Walzengruppen angeordnet ist. Eine Hotflue-Konstruktion mit einem Radialventilator in der Mitte zwischen zwei mit Abstand angeordneten Reihen von Walzen, um die das bahnförmige Gut mäanderförmig geführt wird, ist durch die DE-A-16 35 356 bekannt. Auch dort bläst der Ventilator sowohl nach oben als auch nach unten ab, um die Behandlungsluft über die Heizaggregate aber dort in den Zwischenraum zwischen den Walzen in die jeweilig nach oben oder unten offene Laufenschlaufe einzublasen und aus dem Raum zwischen den Walzen senkrecht zur Transportrichtung der Warenbahn wieder abzusaugen. Gerade aber diese Luftführung hat die befürchteten Kantenabläufe zur Folge.In order to achieve a high treatment result with little energy supplied and at the same time a relatively small device, one embodiment of the invention provides that two groups of two rows of deflection rollers are arranged one above the other within a housing and the fan is arranged in the middle between these roller groups. DE-A-16 35 356 discloses a hot-flue construction with a radial fan in the middle between two spaced rows of rollers around which the web-shaped material is guided in a meandering manner. Here, too, the fan blows both upwards and downwards in order to inject the treatment air via the heating units, however, into the space between the rollers into the running loop, which is open upwards or downwards, and out of the space between the rollers perpendicular to the transport direction of the web vacuum again. But it is precisely this air flow that results in the feared edge drains.

Bei der Vorrichtung nach der Erfindung, bei der mit einem Ventilator im Grunde zwei einzelne Hotflue-Konstruktionen mit der notwendigen Luftmenge versorgt werden, ist es dennoch möglich, mit unterschiedlichen Temperaturen zu arbeiten. Es ist lediglich der Saugraum in der Höhe der Ventilatorachse längs des Behandlungsabteils zu unterteilen. Damit saugt der obere Teil des Ventilatoransaugstutzens nur die in der oberen Hotflue umgewälzte Luft an. Aufgrund der Umdrehung des Ventilators und der Anordnung der Ventilatorschaufeln tritt dann die beschleunigte Luft zwar um einen Winkel versetzt wieder aus dem Ventilatorrad aus, jedoch kann dieser Winkel von etwa 30-45° durch entsprechende Trennwände im Ventilatorraum so berücksichtigt werden, daß eine exakte Trennung zwischen der Ober- und der Unterluft bewirkt ist. Das Gleiche gilt für die in der unteren Hotflue umgewälzte Behandlungsluft.In the device according to the invention, in which basically two individual hot-flue constructions are supplied with the necessary amount of air with a fan, it is nevertheless possible to work with different temperatures. It is only necessary to subdivide the suction space at the level of the fan axis along the treatment compartment. This means that the upper part of the fan intake only sucks in the air circulated in the upper hot flue. Due to the rotation of the fan and the arrangement of the fan blades, the accelerated air emerges from the fan wheel offset by an angle, but this angle of about 30-45 ° can be taken into account by appropriate partition walls in the fan room so that an exact separation between the upper and lower air is effected. The same applies to the treatment air circulated in the lower hot flue.

Aufgrund dieser Vorteile ist es zweckmäßig, die oben und unten im Ventilatorraum angeordneten Heizkörper mit getrennten Reglern und ggf. mit unterschiedlichen Heizleistungen zu versehen, so daß ohne weiteres die über die obere Walzengruppe laufende Warenbahnmenge mit Luft eines anderen Zustandes behandelt wird als die über die untere Walzengruppe laufende Warenbahnmenge, obgleich zur Beschleunigung der Luftmenge lediglich ein Radialventilator vorgesehen ist.Because of these advantages, it is expedient to provide the radiators arranged at the top and bottom in the fan room with separate controllers and, if necessary, with different heating capacities, so that the quantity of web running over the upper roller group is easily treated with air of a different state than that over the lower one Roll group of running web quantity, although only a radial fan is provided to accelerate the air quantity.

In der Zeichnung sind zwei Ausführungsbeispiele der Vorrichtung nach der Erfindung dargestellt. An diesen werden noch weitere erfinderische Details erläutert, die auch im Zusammenhang mit der Grundidee der Erfindung zu sehen sind. Es zeigen :

  • Figur 1 im Längsschnitt eine Hotflue mit den dazwischen angeordneten Luftführungskästen,
  • Figur 2 einen Schnitt quer durch die Vorrichtung nach Fig. 1 in Höhe der Achse eines stirnseitig angeordneten Ventilators,
  • Figur 3 eine Ausschnittvergrößerung aus der Fig. 1 mit einer genaueren Darstellung der Luftführungskästen und
  • Figur 4 einen Schnitt quer durch eine Hotfiue-Konstruktion in Höhe der Achse eines stirnseitig angeordneten Radialventilators.
In the drawing, two embodiments of the device according to the invention are shown. These are used to explain further inventive details which are also to be seen in connection with the basic idea of the invention. Show it :
  • FIG. 1 shows a hot flue in longitudinal section with the air guide boxes arranged in between,
  • FIG. 2 shows a section across the device according to FIG. 1 at the level of the axis of a ventilator arranged at the end,
  • FIG. 3 shows an enlarged detail from FIG. 1 with a more precise illustration of the air guide boxes and
  • Figure 4 shows a section across a hot film construction at the level of the axis of a radial fan arranged at the end.

Die Vorrichtung besteht aus einem wärmeisolierten Gehäuse 1, das durch eine Längswand 2 in eine Ventilatorkammer 3 und einen Saugraum 4 mit sich anschließendem Behandlungskammer 5 unterteilt ist. Im Ventilatorraum ist der Radialventilator 6 horizontal drehbar gelagert, dessen Ansaugstutzen 7 in den Saugraum 4 mündet. Der Saugraum 4 ist durch die Längswandung 2 eine Trennwand 8 und mit oben und unten angeordneten Begrenzungswandungen (hier Gehäuse 1 und Unterteilungswandung 17') gebildet, wobei die Trennwand 8 den Saugraum 4 von der Behandlungskammer 5 unterteilt.The device consists of a heat-insulated housing 1, which is divided by a longitudinal wall 2 into a fan chamber 3 and a suction chamber 4 with a subsequent treatment chamber 5. In the fan chamber, the radial fan 6 is rotatably supported horizontally, the suction pipe 7 of which opens into the suction chamber 4. The suction space 4 is formed by the longitudinal wall 2, a partition 8 and with upper and lower boundary walls (here housing 1 and partition wall 17 '), the Partition 8 divides the suction chamber 4 from the treatment chamber 5.

In der Behandlungskammer 5 sind zwei Reihen von Umlenkwalzen 9, 10, jeweils wechselseitig auf Lücke angeordnet, so daß die zu behandelnde Warenbahn 11 mäanderförmig durch die Länge der aus Fig. 1 ersichtlichen Vorrichtung mit lotrechter Warenführung in den Laufschlaufen transportiert werden kann. Die z. B. zum Trocknen dienende und vom Ventilator 6 beschleunigte Behandlungsluft wird insgesamt den über die Höhe der Laufschlaufen zwischen diesen angeordneten Luftführungskästen 12 zugeführt und auch in diesen abgeführt, so daß also im Bereich der Umlenkwalzen 9, 10 selbst keine Luftströmung ist. Dies hat den Vorteil, daß die Warenbahn nur in ihrem frei geführten Bereich der Luftströmung ausgesetzt ist, sie jedoch beim Umlenken nicht abkühlt, da selbstverständlich die Umlenkrollen 9, 10 innerhalb des Gehäuses 1 umlaufen.In the treatment chamber 5, two rows of deflecting rollers 9, 10 are arranged alternately on a gap, so that the web 11 to be treated can be transported in a meandering shape through the length of the device shown in FIG. The z. B. serving for drying and accelerated by the fan 6 treatment air is a total of the arranged above the height of the loops between these air guide boxes 12 and also discharged into them, so that there is no air flow in the region of the deflecting rollers 9, 10 itself. This has the advantage that the web of material is only exposed to the air flow in its freely guided area, but does not cool it when it is deflected, since, of course, the deflection rollers 9, 10 rotate within the housing 1.

Bei der Konstruktion nach der Figur 2 ist der Ventilator 6 im oberen Bereich des Gehäuses 1 angeordnet und setzt die ebenfalls oben angeordneten Saugkästen 13 (-) der Luftführungskästen 12 direkt unter Unterdruck. Der Ventilator 6 kann auch noch höher, z. B. mit einer Achse in Höhe der Walzen 9 angeordnet sein, siehe dazu weiter unten. Die aus den Saugkästen 13 angesaugte Behandlungsluft sammelt sich insgesamt in dem Saugraum 4 und wird von dort gleichmäßig über die Breite eines Behandlungsabteils dem Ventilator 6 zugeführt. Ein Behandlungsabteil umfaßt etwa die Hälfte der Länge der Vorrichtung nach Figur 1, so daß also für diese Länge der Vorrichtung zwei Ventilatoren 6 vorgesehen sind. Die vom Ventilator 6 beschleunigte Behandlungsluft strömt allein nach unten aus und wird durch . die Heizeinrichtung 14 geblasen. Nach Umlenkung in Richtung des Pfeiles 15 kann sie eine weitere Heizeinrichtung 16 durchströmen, die über die Breite des Saugraumes 4 zusätzlich installiert sein kann. An diese Heizeinrichtung 16 schließt sich der Druckbereich (+) der Luftführungskästen 12 an. Er ist gebildet durch eine Unterteilwandung 17, die den jeweiligen Luftführungskasten 12 etwa in der Mitte der Höhe in den Saugkasten 13 und einen Druckkasten 18 (+) längs unterteilt. Diese Unterteilungswandung 17 erstreckt sich mit dem Teil 17' selbstverständlich auch durch den Saugraum 4, um eine Kurzschlußströmung vollständig zu verhindern. Gemäß der Darstellung in Figur 2 ist die Unterteilungswandung 17 zwischen dem Saug- und Druckkasten eines Luftführungskastens 12 über die Breite der Behandlungskammer 5 schräg angeordnet, und zwar beginnt der Saugkasten 13 schmal und verbreitert sich hin zum Ventilator 6, während umgekehrt der Druckkasten 18 an der Einströmöffnung 27 schmal beginnt und sich zum Ende hin verbreitert. Auch dieses dient zur optimalen Luftführung und Ausnutzung der zu beeinflussenden Luftmenge.In the construction according to FIG. 2, the fan 6 is arranged in the upper region of the housing 1 and puts the suction boxes 13 (-) of the air guide boxes 12, which are also arranged at the top, directly under negative pressure. The fan 6 can also be higher, e.g. B. with an axis at the level of the rollers 9, see below. The treatment air drawn in from the suction boxes 13 collects in total in the suction chamber 4 and is fed from there to the fan 6 uniformly over the width of a treatment compartment. A treatment compartment comprises approximately half the length of the device according to FIG. 1, so that two fans 6 are therefore provided for this length of the device. The treatment air accelerated by the fan 6 flows out downwards and is exhausted by. the heater 14 blown. After deflection in the direction of arrow 15, it can flow through a further heating device 16, which can additionally be installed across the width of the suction space 4. The pressure area (+) of the air guide boxes 12 connects to this heating device 16. It is formed by a lower wall 17, which divides the respective air guide box 12 approximately in the middle of the height into the suction box 13 and a pressure box 18 (+) lengthways. This partition wall 17 extends with the part 17 'of course also through the suction space 4 in order to completely prevent a short circuit flow. According to the representation in Figure 2, the partition wall 17 between the suction and pressure box of an air guide box 12 is arranged obliquely across the width of the treatment chamber 5, namely the suction box 13 starts narrow and widens towards the fan 6, while conversely the pressure box 18 on the Inflow opening 27 begins narrowly and widens towards the end. This also serves for optimal airflow and utilization of the air volume to be influenced.

Die Luftführungskästen 12 sind nicht nur so dimensioniert, daß sie die wesentliche lichte Höhe zwischen den oberen und unteren Umlenkwalzen 9 und 10 nutzen, um ein großes Luftvolumen . aufnehmen zu können, sondern sie nehmen auch den wesentlichen freien Raum zwischen den jeweils von oben nach unten und umgekehrt geführten Trums der jeweils benachbarten Warenbahnteilstücke ein. Für die zu erzeugende hohe Luftströmung parallel zur Laufrichtung der Warenbahn ist nur ein schmaler Luftspalt gelassen, der insbesondere aus Figur 3 hervorgeht. Diese Verengung des Luftströmungsraumes bewirkt eine hohe Luftgeschwindigkeit in diesem Trockenbereich zwischen den Umlenkwalzen 9, 10.The air guide boxes 12 are not only dimensioned so that they use the essential clear height between the upper and lower deflecting rollers 9 and 10 to a large volume of air. to be able to record, but they also take up the essential free space between the respective runs from top to bottom and vice versa of the adjacent fabric sections. For the high air flow to be generated parallel to the running direction of the web, only a narrow air gap is left, which is particularly evident from FIG. 3. This narrowing of the air flow space causes a high air speed in this drying area between the deflecting rollers 9, 10.

Die aus dem Druckkasten 18 unten entlang der Öffnungen 19 im spitz zulaufenden Ausblasteil ausströmende Behandlungsluft gelangt dort zunächst in einen Düsen-kasten 20, der die Druckluft allein nach oben in Richtung der erwünschten Luftströmung ausbläst. Dazu sind an den seitlichen, um 45° schräg verlaufenden Wandungen 21 der Düsenkästen Ausblasöffnungen 22 vorgesehen, die jetzt in einem Winkel von etwa 45° gegen die Ware 11 nach oben ausgerichtet sind. Dadurch prallt die große Luftmenge nicht senkrecht auf die Warenbahn, es werden Wirbel vermieden. Bei der hohen Luftleistung kann so auch keine Farbverdrängung auf der Warenbahnoberfläche stattfinden, auch ist ein ruhiger Warenlauf ohne Flattern gewährleistet. Selbstverständlich sind die Ausblasöffnungen 22 auf beiden Seiten der Düsenkästen 20 angeordnet, so daß der jeweilige Trum einer Warenbahn stets beidseitig durch eine starke Luftströmung beaufschlagt ist.The treatment air flowing out of the pressure box 18 at the bottom along the openings 19 in the tapered blow-out part first arrives there in a nozzle box 20 which blows out the compressed air solely in the direction of the desired air flow. For this purpose, blow-out openings 22 are provided on the side walls 21 of the nozzle boxes, which are inclined by 45 ° and are now oriented upwards at an angle of approximately 45 ° to the goods 11. As a result, the large amount of air does not hit the web vertically, and eddies are avoided. With the high air output, there is no color displacement on the surface of the web, and a smooth flow of goods is guaranteed without fluttering. Of course, the blow-out openings 22 are arranged on both sides of the nozzle boxes 20, so that the respective run of a material web is always acted upon on both sides by a strong air flow.

Zur Beeinflussung der Luftströmung sowohl im Druck als auch im Saugteil der Luftdeitkästen 12 sind Staubleche vorgesehen. So ist z. B. im Druckkasten 18 ein Lochblech 23 angeordnet, das parallel zur Unterteilungswandung 17 im Bereich des Düsenkastens 20'beginnend ausgerichtet ist. Weiterhin dienen die Luftöffnungen 19 im Druckkasten 18 zur Vergleichmäßigung der Luftströmung und zur Erhöhung des statischen Druckes. Im Saugkasten 13 ist zumindest im Anschluß an die Saugöffnungen 24 ein Flusensieb 25 von der dem Ventilator 6 abgekehrten Stirnwandung des Gehäuses 1 her eingeschoben. Auch dort kann noch ein zusätzliches Lochblech (25) die Luftströmung beeinflussen".Baffles are provided to influence the air flow both in the pressure and in the suction part of the air side boxes 12. So z. B. in the pressure box 18, a perforated plate 23 is arranged, which is aligned parallel to the partition wall 17 in the area of the nozzle box 20 'beginning. Furthermore, the air openings 19 in the pressure box 18 serve to even out the air flow and to increase the static pressure. In the suction box 13, at least in connection with the suction openings 24, a fluff filter 25 is inserted from the end wall of the housing 1 facing away from the fan 6. There, too, an additional perforated plate (25) can influence the air flow ".

Die aus dem Saugkasten 13 in den Saugraum 14 strömende Behandlungsluft prallt bei dieser Anordnung des Ventilators 6 zunächst gegen ein Luftprallblech 26, das auf der Unterteilungswandung 17' im Saugraum 4 mit Abstand von der Tennwand 8 abgestützt ist, und oben in Höhe der Saugöffnungen 24 des Luftführungskastens 12 endet. Somit muß die vom Ventilator 6 angesaugte Behandlungsluft erst um diese Oberkante des Luftprallbleches 26 strömen, so daß die Saugkästen 13 eines Behandlungsabteiles gleichmäßig mit Unterdruck beaufschlagt sind. Ein solches zusätzliches Prallblech 26 kann entfallen, wenn der Ventilator 6 nicht genau gegenüber den Saugkästen 13 angeordnet ist, sondern höher, z. B. in Höhe der Umlenkwalzen 9. Dadurch entsteht zwar oberhalb der Walzen 9 ein von der Gehäusewandung 1 umfaßter Leerraum, aber dieser ist günstig für die ev. notwendige Reinigung der Walze 9.In this arrangement of the fan 6, the treatment air flowing from the suction box 13 into the suction chamber 14 initially impacts against an air baffle plate 26, which is supported on the partition wall 17 'in the suction chamber 4 at a distance from the partition 8, and at the top at the suction openings 24 Air guide box 12 ends. Thus, the treatment air sucked in by the fan 6 must first flow around this upper edge of the air baffle plate 26, so that the suction boxes 13 of a treatment compartment are evenly pressurized with a vacuum. Such an additional baffle 26 can be omitted if the fan 6 is not arranged exactly opposite the suction boxes 13, but higher, z. B. at the level of the deflection rollers 9. Although this creates above the rollers 9 a space enclosed by the housing wall 1, but this is favorable for the possibly necessary cleaning of the roller 9.

Die Vorrichtung nach Fig. 4 besteht ebenfalls aus einem wärmeisolierten Gehäuse 1, das durch eine Längswand 2 in eine Ventilatorkammer 3 und einen Behandlungsbereich für die Warenbahn unterteilt ist, in dem zwei Hotflue-Konstruktionen gleicher Bauart übereinander angeordnet sind. Die Grundkonstruktion ist gleich der nach Fig. 1-3, lediglich wurden die Erkennungszeichen' oder" hinzugeführt. Der von der Längswand 2 abgetrennte Saugraum hat einen oberen Teil 4' und einen unteren Teil 4" mit den sich anschließenden Behandlungskammern 5', 5". Im Ventilatorraum 3 ist der Radialventilator 6 horizontal drehbar gelagert, dessen Ansaugstutzen 7 in die Saugräume 4', 4" mündet. Der Saugraum-4', 4" ist durch die Längswandung 2 und eine Trennwand 8 mit oben und unten angeordneten Abdeckblechen gebildet, wobei die Trennwand 8 den Saugraum 4', 4" vom Behandlungsraum 5', 5" unterteilt.4 also consists of a heat-insulated housing 1, which is divided by a longitudinal wall 2 into a fan chamber 3 and a treatment area for the web, in which two hot-flue constructions of the same type are arranged one above the other. The basic construction is the same as that shown in FIGS. 1-3, only the identifiers' or "have been added. The suction space separated from the longitudinal wall 2 has an upper part 4 'and a lower part 4" with the adjoining treatment chambers 5', 5 " In the fan chamber 3, the radial fan 6 is rotatably supported horizontally, the suction pipe 7 of which opens into the suction chambers 4 ', 4 ". The suction chamber 4 ', 4 "is formed by the longitudinal wall 2 and a partition 8 with cover plates arranged at the top and bottom, the partition 8 dividing the suction chamber 4', 4" from the treatment chamber 5 ', 5 ".

Sowohl in dem oberen als auch in dem unteren Behandlungskammer 5', 5" sind zwei Reihen von Umlenkwalzen 9', 10', 9", 10" jeweils wechselseitig auf Lücke angeordnet, so daß die zu behandelnde Warenbahn mäanderförmig durch die Länge der Vorrichtung mit lotrechter Warenführung in den Laufschlaufen transportiert werden kann. An der einlaufseitigen Stirnwand ist auch der Auslauf angeordnet, während an der gegenüberliegenden Stirnwand der Vorrichtung die Warenbahn innerhalb des Gehäuses von unten nach oben zur entgegengesetzt laufenden Hotflue zum Fertigbehandeln weiterläuft.Both in the upper and in the lower treatment chamber 5 ', 5 ", two rows of deflecting rollers 9', 10 ', 9", 10 "are arranged alternately on a gap, so that the web to be treated meanders through the length of the device The outlet is also arranged on the end wall on the inlet side, while on the opposite end wall of the device, the web continues inside the housing from bottom to top to the oppositely running hot flue for finishing.

Die z. B. zum Trocknen dienende und von Ventilator 6 beschleunigte Behandlungsluft wird insgesamt den jeweils über die Höhe der Laufschlaufen zwischen diesen angeordneten Luftführungskästen 12',12" zugeführt und auch in diesen abgeführt, so daß also im Bereich der Umlenkwalzen 9', 9", 10', 10" selbst keine Luftströmung ist. Dies hat den Vorteil, daß die Warenbahn nur in ihrem frei geführten Bereich der Luftströmung ausgesetzt ist, sie jedoch beim Umlenken nicht abkühlt, da selbstverständlich die Umlenkrollen 9', 9". 10'. 10" innerhalb des Gehäuses 1 umlaufen.The z. B. serving for drying and accelerated by fan 6 treatment air is a total of the respective height of the loops arranged between these arranged air guide boxes 12 ', 12 "and also discharged into these, so that in the region of the deflecting rollers 9', 9", 10th ', 10 "itself is not an air flow. This has the advantage that the material web is only exposed to the air flow in its freely guided area, but does not cool it down during deflection, since the deflection rollers 9', 9", of course. 10 '. 10 "circulate within the housing 1.

Bei der gezeigten Konstruktion ist der Ventilator 6 in der Mitte des Gehäuses 1 angeordnet und setzt die unmittelbar zugeordneten oberen und unteren Saugkästen 13', 13" (-) der Luftführungskästen 12', 12" direkt unter Unterdruck. Die aus den Saugkästen 13', 13" angesaugte Behandlungsluft sammelt sich insgesamt in dem Saugraum 4', 4", der lediglich durch eine mittige Trennwand 26 längs unterteilt ist, und wird von dort gleichmäßig über die Breite eines Behandlungsabteiles dem Ventilator 6 zugeführt. Ein Behandlungsabteil umfaßt eine Vielzahl von nebeneinander angeordneten Walzen. Die vom Ventilator 6 beschleunigte Behandlungsluft strömt sowohl nach oben als auch nach unten aus und wird durch die Heizeinrichtungen 14', 14" geblasen. Nach Umlenkung in Richtung der Pfeile 15', 15" strömt die regenerierte Luft in den sich anschließenden Druckbereich (+) der Luftführungskästen 12', 12". Er ist gebildet durch jeweils eine Unterteilungswandung 17', 17", die den jeweiligen Luftführungskasten 12', 12" etwa in der Mitte der Höhe in den Saugkasten 13', 13" (-) und .einen Druckkasten 18', 18" (+) längs unterteilt. Diese Unterteilungswandung 17', 17" erstreckt sich mit dem Teil "' selbstverständlich auch durch den zugeordneten Saugraum 4', 4", um eine Kurzsohlußströmung zu verhindern.In the construction shown, the fan 6 is arranged in the middle of the housing 1 and puts the directly assigned upper and lower suction boxes 13 ', 13 "(-) of the air guide boxes 12', 12" directly under negative pressure. The treatment air sucked in from the suction boxes 13 ′, 13 ″ collects overall in the suction chamber 4 ′, 4 ″, which is only divided longitudinally by a central partition wall 26, and is fed from there to the fan 6 uniformly over the width of a treatment compartment. A treatment compartment comprises a plurality of rollers arranged side by side. The treatment air accelerated by the fan 6 flows both upwards and downwards and is blown through the heating devices 14 ', 14 ". After deflection in the direction of the arrows 15', 15", the regenerated air flows into the subsequent pressure range (+) of the air guide boxes 12 ', 12 ". It is formed by a partition wall 17', 17", which the respective air guide box 12 ', 12 "approximately in the middle of the height into the suction box 13', 13" (-) and Pressure box 18 ', 18 "(+) divided longitudinally. This partition wall 17', 17" extends with the part "'of course also through the associated suction space 4', 4" to prevent a short sole flow.

Die Luftführungskästen 12', 12" sind nicht nur so dimensioniert, daß sie die wesentliche lichte Höhe zwischen den oberen und unteren Umlenkwalzen 9', 9" und 10', 10" nutzen, um ein großes Luftvolumen aufnehmen zu können, sondern sie nehmen auch den wesentlichen freien Raum zwischen den jeweils von oben nach unten und umgekehrt geführten Trums der jeweils benachbarten Warenbahnteilstücke ein. Für die zu erzeugende hohe Luftströmung parallel zur Laufrichtung der Warenbahn ist nur ein schmaler Luftspalt gelassen, der insbesondere aus Fig. 3 nach der Hauptanmeldung hervorgeht. Diese Verengung des Luftströmungsraumes bewirkt eine hohe Luftgeschwindigkeit in diesem Trockenbereich zwischen den Umlenkwalzen 9', 9", 10', 10".The air guide boxes 12 ', 12 "are not only dimensioned such that they use the essential clear height between the upper and lower deflecting rollers 9', 9" and 10 ', 10 "to be able to accommodate a large volume of air, but they also take the essential free space between the respective runs from top to bottom and vice versa of the adjacent sections of the web. For the high air flow to be generated parallel to the direction of travel of the web, only a narrow air gap is left, which is particularly apparent from Fig. 3 after the main application. This narrowing of the air flow space causes a high air speed in this drying area between the deflecting rollers 9 ', 9 ", 10', 10".

Aus dieser Beschreibung der Vorrichtung nach der Fig. 4, die mit Änderungen der Figur 2 entspricht, geht hervor, daß die Grundkonstruktion bei der Luftführung unverändert belassen ist. Mit Vorteil sind lediglich zwei solcher Hotflue-Konstruktionen übereinander angeordnet, wobei zwischen der unteren Walze 10' der oben angeordneten Hotflue und der oberen Walze 9" der unten angeordneten Hotflue genügend Raum gelassen ist, um die Walzen ohne Demontage reinigen zu können. Gleiches gilt für den Bereich zwischen Gehäusewandung 1 und den benachbarten Walzen 9' und 10". Aufgrund dieser Übereinanderanordnung ist jetzt der Ventilator 6 nicht mehr dem Saugkasten 13' oder 13" unmittelbar gegenüberliegend angeordnet, was für die gleichmäßige Luftströmung aller dem Ventilator 6 zugeordneten Luftführungskästen 12', 12" eines breiteren Behandlungsabteils günstig ist.From this description of the device according to FIG. 4, which corresponds to changes in FIG. 2, it can be seen that the basic construction in the air guidance is left unchanged. Advantageously, only two such hotflue constructions are arranged one above the other, with sufficient space being left between the lower roller 10 'of the hotflue arranged at the top and the upper roller 9 "of the hotflue arranged below to be able to clean the rollers without disassembly. The same applies to the area between the housing wall 1 and the adjacent rollers 9 'and 10 ". Because of this arrangement one above the other, the fan 6 is no longer arranged directly opposite the suction box 13 'or 13 ", which is favorable for the uniform air flow of all the air guide boxes 12', 12" of a wider treatment compartment assigned to the fan 6.

Zur getrennten Luftführung in der oberen Hotflue gegenüber der unteren ist - wie gesagt - im Saugraum in Höhe der Ventilatorachse die Trennwandung 26 angeordnet. Diese ermöglicht eine unterschiedliche Behandlung der z. B. unten naß einlaufenden Warenbahn gegenüber dem Behandlungsabschnitt der nach Vertrocknung jetzt nach oben transportiert ist und dort weniger Heizenergie braucht, und wo weniger feuchte Luft umgewälzt werden sollte. Die Heizeinrichtungen sollten dementsprechend mit getrennten Reglern und ggf. unterschiedlicher Heizleistung ausgestattet sein. Auch sind für die obere und untere Hotflue gesonderte Luftabstöße einzubauen.For a separate air flow in the upper hotflue compared to the lower one, as already mentioned, the partition 26 is arranged in the suction space at the level of the fan axis. This enables different treatment of the z. B. below wet incoming web compared to the treatment section which is now transported after drying up and requires less heating energy there, and where less moist air should be circulated. Accordingly, the heating devices should be equipped with separate controllers and, if necessary, different heating outputs. Separate air blows must also be installed for the upper and lower hot flue.

Claims (18)

1. Apparatus for the continuous thermal treatment, such as drying, of web-like or strip-like textile material (11), having a housing (1) and two rows of rollers (9, 10) which are disposed therein and around which rollers the textile material (11) is conducted through the apparatus in a meander-like manner to form material loops, and having a longitudinal wall (2), which divides a ventilator chamber (3) in the apparatus, a ventilator (6) which circulates the treatment medium being disposed on the ventilator chamber side of the longitudinal wall, and a suction chamber (4) which extends over the entire length of a treatment compartment being associated with the ventilator suction pipe (7) on the other side of the longitudinal wall, wherein suction boxes (13) are disposed in the treatment chamber (5), which communicates with the suction chamber (4) and is provided with the two rows of rollers (9, 10), the suction boxes extending over the width of the treatment chamber (5) at one end of the individual material loops and being partially open at the side facing the rollers (9, 10), and each end-face aperture facing the suction chamber (4) coincides with an aperture in a separation wall (8) which extends over the whole length and height of the housing (1) and forms the suction chamber (4) with upper and lower boundary walls, together with the longitudinal wall (2), characterised in that substantially the whole height between the upper and lower rows of rollers (9, 10) and each region between an upwardly and downwardly travelling end section of a material loop is provided with an air conduction box (12) which occupies the substantial internal width between the end section and is provided, on the one hand, with outlet apertures (22) and, on the other hand, with suction apertures (24), the air conduction box being longitudinally divided over the working width, approximately in the middle of the height, into the suction box (13) and into a pressure box (18).
2. Apparatus according to claim 1, characterised in that the lower boundary wall of the suction chamber (4) is the dividing wall (17, 17') between suction and pressure boxes (13, 18) of an air conduction box (12) and extends inclinedly over the width of the treatment chamber (5), that is to say, it widens from the suction'box (13) towards the ventilator (6).
3. Apparatus according to claim 2, characterised in that, due to the inclined dividing wall (17), the pressure box (18) widens conically towards the closed, end-face end, and a perforated obstruction plate (23) extends parallel to the dividing wall (17), commencing at the lower edge of the inlet aperture (27).
4. Apparatus according to one of claims 1-3 having a pressure box with outlet apertures provided over the length of the area of the pressure box facing the associated roller, characterised in that a nozzle box (20) communicates over its length with the pressure box (18) in an air-tight manner, the outlet apertures (22) in the nozzle box being directed towards the materials (11) in a direction relative to the out-flowing air at an angle of less than 90°, preferably 45°.
5. Apparatus according to claim 4, characterised in that identical outlet apertures (22) are provided on both longitudinal ends of the nozzle box (20).
6. Apparatus according to claim 1, characterised in that, in the region of the suction apertures (24) in the suction box (13) of the air conduction box (12), a slub filter (25) is longitudinally slideable from the end of the housing (1) remote from the ventilator.
7. Apparatus according to claim 1 or 6, characterised in that a perforated plate separates the suction apertures (24) in the suction box (13) of the air conduction box (12).
8. Apparatus according to claim 1, characterised in that an air baffle plate (26) extends longitudinally through the suction chamber (4) over the height of the ventilator suction pipe (7) and at a distance from the separation wall (8), which air baffle plate is supported on the dividing wall (17') between suction and pressure boxes of the apparatus and terminates on the other side on a level with the suction apertures (24) in the air conduction box (12).
9. Apparatus according to claims 1-8 having a radial ventilator in the ventilator chamber which communicates with a heating means, characterised in that the ventilator (6) is disposed on a level with the suction box (13) of the air conduction box (12) or higher, on a level with the rollers (9), e.g. in the upper region of the apparatus, and the ventilator (6) blows downwardly from only one end in the direction of the heating means (14).
10. Apparatus according to claim 9, characterised in that an additional heating means (16) is disposed adjacent to the heating means (14) over the width of the suction chamber (4) on a level with the latter heating means disposed in the ventilator chamber (3).
11. Apparatus according to one of claims 1-10, characterised in that the entire air accelerated by the ventilator (6) is solely supplied to the pressure box (18) of the air conduction box (12) disposed between the loops.
12. Apparatus according to claim 1, characterised in that two groups, each having two rows of rollers (9', 10', 9", 10"), are disposed one above the other inside the housing (1), and the ventilator (6) is disposed in the middle between these roller . groups.
13. Apparatus according to claim 12, characterised in that the two roller groups are spaced from one another.
14. Apparatus according to one of claims 12-13, characterised in that the treatment medium emerges both upwardly and downwardly on the . pressure side of the ventilator (6), and each pressure box (18) of the air conduction boxes (12', 12") is associated with the respective outer rollers (9', 10").
15. Apparatus according to one of claims 12-14, characterised in that the suction chamber (4', 4") is divided by a central separation wall (26) on a level with the ventilator axis longitudinally of the treatment compartment.
16. Apparatus according to claim 15, characterised in that the heating means (14, 14'), disposed in the upper and lower regions of the ventilator chamber (3), are provided with separate regulators, possibly having different heating outputs.
17. Apparatus according to one of claims 15-16, characterised in that the length of the material web passing over the upper roller group is-treated with air of a different state in the circuit than the length of material web passing over the lower roller group, although only one ventilator (6) is provided for the acceleration of the air volumes.
18. Apparatus according to claim 17, characterised in that the upper and lower roller groups each have an air expulsion system and a fresh-air supply system associated. therewith.
EP84107497A 1983-07-01 1984-06-28 Apparatus for the continuous heat treatment, e.g. drying, of webs or ribbons of textile material Expired EP0130579B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3323827 1983-07-01
DE19833323827 DE3323827A1 (en) 1983-07-01 1983-07-01 Apparatus for the continuous heat treatment, such as drying, of lengths or strips of textile material
DE19833327064 DE3327064A1 (en) 1983-07-27 1983-07-27 Apparatus for continuous heat treatment, such as drying, of lengths or strips of textile material
DE3327064 1983-07-27

Publications (3)

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EP0130579A2 EP0130579A2 (en) 1985-01-09
EP0130579A3 EP0130579A3 (en) 1985-11-13
EP0130579B1 true EP0130579B1 (en) 1988-07-06

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EP84107497A Expired EP0130579B1 (en) 1983-07-01 1984-06-28 Apparatus for the continuous heat treatment, e.g. drying, of webs or ribbons of textile material

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DE (1) DE3472586D1 (en)

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Publication number Priority date Publication date Assignee Title
ES2555527T3 (en) * 2009-12-30 2016-01-04 Benninger Zell Gmbh Device and procedure for heat treatment of flat structures continuously transported
DE102010018357A1 (en) * 2010-04-15 2011-10-20 Fleissner Gmbh Device for the flow-through treatment of sheet material
KR101252141B1 (en) * 2011-04-18 2013-04-08 신오재 Heat treatment device for textile
KR101408147B1 (en) * 2013-10-30 2014-06-17 주식회사 한국테크놀로지 Apparatus for Drying Coal using Reheat Steam
CN110360824A (en) * 2019-06-21 2019-10-22 江苏鹏翔新材料科技股份有限公司 Automatic drying apparatus is used in a kind of special resistance polyester fiber knitting fabric processing
CN115540554A (en) * 2022-09-23 2022-12-30 大丰万达纺织有限公司 Drying device for spinning

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Publication number Priority date Publication date Assignee Title
DE688671C (en) * 1932-09-16 1940-02-28 Svenska Flaektfabriken Ab Drying device for pulp, textile or the like webs
DE2141692C3 (en) * 1971-08-20 1985-11-14 Vepa AG, Riehen, Basel Device for continuous heat treatment, such as drying, of web or tape-shaped textile material
DE2508873C2 (en) * 1975-02-28 1985-11-28 Vepa AG, Riehen, Basel Method and device for heat treatment of goods that can be subjected to longitudinal tensile stress
DE2540852C3 (en) * 1975-09-13 1978-03-09 Hoechst Ag, 6000 Frankfurt Method and additional device for textile drying machines for uniform drying of a textile web

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EP0130579A3 (en) 1985-11-13
DE3472586D1 (en) 1988-08-11
EP0130579A2 (en) 1985-01-09

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