EP2354740B1 - Method and device for thermal treatment of webs of material - Google Patents

Method and device for thermal treatment of webs of material Download PDF

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Publication number
EP2354740B1
EP2354740B1 EP11151441.0A EP11151441A EP2354740B1 EP 2354740 B1 EP2354740 B1 EP 2354740B1 EP 11151441 A EP11151441 A EP 11151441A EP 2354740 B1 EP2354740 B1 EP 2354740B1
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EP
European Patent Office
Prior art keywords
processing
air
fields
heating system
central heating
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EP11151441.0A
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German (de)
French (fr)
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EP2354740A2 (en
EP2354740A3 (en
Inventor
Michael Christ
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Brueckner Trockentechnik GmbH and Co KG
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Brueckner Trockentechnik GmbH and Co KG
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
    • D06B15/09—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by jets of gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C7/00—Heating or cooling textile fabrics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating

Definitions

  • the invention relates to a device and a method for heat treatment of web-shaped, in particular textile webs with a plurality of successive treatment fields.
  • the DE 100 10 842 B4 consists of the device for the treatment of webs, in particular for drying textile webs, essentially of a housing, at least one treatment field for acting on the web with a treatment gas, means for supplying fresh air into the housing and means for discharging moisture-laden exhaust air the housing.
  • a mixing device is further provided, which provides one or more inflow openings for the circulating circulating air, one or more inflow openings for the fresh air and a discharge opening for the treatment gas and further comprises adjusting means by which the present in the treatment gas ratio of fresh air circulating circulating air is adjustable.
  • a burner device is provided in the region of the mixing device, which has a flame guide tube and wherein inflow openings for the circulating circulating air and the fresh air are provided, which are arranged concentrically around the flame guide tube.
  • a device for heat treatment of textile webs which consists essentially of a plurality of successive treatment zones, which are designed as impact jet ventilation zones and means for deriving the exhaust air of the impact jet ventilation zones. Furthermore, an upstream in the transport direction of the web treatment zone is provided, which is designed as a ventilation zone, wherein the means for discharging the exhaust air of the impact jet ventilation zones are connected to the ventilation zone such that the exhaust air is passed through the web.
  • the treatment gas is blown onto the web in order to dry it, for example, whereby the treatment gas absorbs the moisture.
  • the exhaust air By the exhaust air is passed through the web in the upstream aeration zone, the exhaust air can continue to cool down to the cooling limit temperature, wherein energy is supplied to the web. This causes an increase in the efficiency of the drying performance and an energy saving.
  • the US Pat. No. 4,516,332 A describes a device for heat treatment of web-shaped, in particular textile webs according to the preamble of claim 1, wherein in each treatment field, a burner or heat exchanger is provided.
  • a burner or heat exchanger is provided in each treatment field.
  • From the US 3 793 741 A shows a drying device with a combined radiant and convection heating, which uses a central heating system.
  • the invention is based on the object to take further measures to save energy.
  • the treatment gas is brought to the required temperature by burner devices which are arranged in each treatment field.
  • the burner devices in different treatment fields have to be partly operated with different power.
  • the required heat output in particular by the properties of the web and / or a changing ratio of supply air and circulating circulating air, vary, so that the burner devices can not always be operated at the optimum operating point and thereby often can not exploit their full efficiency.
  • the heat required to adjust the temperature of the treatment gas can be generated centrally.
  • Each treatment device only removes the required amount of heat, with the amount of heat that has not been removed being returned via the loop.
  • the central heating device in particular a central combustion chamber, always be driven in the optimal control range, whereby a more complete burnout and better energy utilization is ensured.
  • results from the Replacing the plurality of burners (in the individual treatment fields) by a central heating system a significant cost savings.
  • the central heating system is designed for heating the supply air and the means for supplying the supply air are formed by the loop, which in turn is in communication with the mixing means of the plurality of treatment fields.
  • the supply air is heated centrally and fed via the loop to the individual treatment fields, while excess supply air is returned to the central heating system.
  • the treatment fields each comprise a heat exchanger for heating the treatment gas, the heat exchangers of the treatment fields being connected on their hot side via the loop to the central heating system.
  • the central heating system has a connection for supplying fresh air.
  • the treatment fields can be followed by a fresh air-operated cooling field, which has a connection for supplying fresh air and a connection connected to the central heating system for discharging preheated fresh air.
  • the central heating system can be controlled as a function of at least one parameter of the exhaust air produced in the treatment fields, in particular as a function of the carbon content, and / or the humidity and / or the temperature of the supply air.
  • a first embodiment of the invention is shown schematically.
  • This is, for example, a device for heat treatment of textile webs.
  • the webs may also be, for example, nonwovens, coatings of textile supports such as carpet backings, artificial leather and the like.
  • other, non-textile, web-shaped webs come into consideration.
  • a textile material web 4 is transported through the treatment fields by means of transport means 4a, which are indicated schematically only by arrows, in the expanded state.
  • transport means 4a which are indicated schematically only by arrows, in the expanded state.
  • jet ventilation zones with lower and upper nozzle systems 5, 6 are formed, which extend over the entire width of the web, so that the web is acted upon both from above and from below with a treatment gas 7.
  • the treatment gas 7 is applied to the web 4 by means of one or more fans 14 via the lower and upper nozzle systems 5, 6.
  • the amount of supply air 8 supplied to the treatment gas is discharged in a corresponding amount in the form of exhaust air 15 via a central device 16.
  • All other half-fields 1b to 3a are constructed in an analogous manner, wherein the supply of the treatment gas to the nozzle systems 5, 6 always takes place alternately from one side or the other in successive half-fields.
  • the central heating system 10 is accommodated for heating the supply air, which communicates via the ring line 11 with the mixing devices 13b of the treatment fields 1 to 3. It consists in the illustrated embodiment essentially of a central combustion chamber 10a and a central heat exchanger 10b, the two ends of the loop 11 are connected to the combustion chamber 10a, so that unused supply air to the central heating system 10 is returned and can be used again.
  • the central heating system also has a connection 17 for supplying fresh air 18 provided on the heat exchanger 10b.
  • the heat exchanger is further connected to the means 16 for discharging the exhaust air 15, so that the supplied via the port 17 fresh air 8 is preheated with the exhaust gases 15 from the treatment fields before the fresh air is fed into the combustion chamber 10a.
  • the treatment field 3 is still a downstream of the fresh air 18 cooled box 20 downstream, which has a connection 20a for supplying the fresh air 18 and a communicating with the central heating system 10 connection 20b for discharging preheated fresh air.
  • the cooling field 20 may optionally be designed as a baffle ventilation zone 20c or as a ventilation zone 20d, wherein the fresh air is either inflated from above and below onto the material web 4 (impact jet ventilation zone 20c) or the fresh air is forced through the material web 4 and / or drawn in (aeration zone 20d).
  • the control of the central heating system via an only schematically indicated control device (see Fig. 1b ).
  • the pressure in the loop 11 is measured after the last, connected half-field via a pressure sensor 22 and used to control the amount of fresh air.
  • the combustion chamber 10a is controlled as a function of at least one parameter of the exhaust air, in particular as a function of the carbon content and / or the humidity and / or the temperature of the supply air 8, wherein both combustion air 10c, fuel 10d and fresh air quantity can be controlled.
  • the device is driven in the predetermined nominal ranges or with predetermined nominal values.
  • the entire device is housed within a housing 24, wherein in particular the ring line 11 and the central means 16 for discharging the exhaust air and the central heating system within the housing are arranged.
  • the central heating system is preferably arranged below the nozzle systems 5, 6 of the last treatment field 3 in the transport direction (arrow 4a). As in particular from the Fig. 3 and 4 As can be seen, the combustion chamber 10a and the heat exchanger below the lower nozzle system 5 can be installed. There is still sufficient space for the mixing device 13b of the last treatment field. This creates a very compact device.
  • a heat exchanger 25 for indirect heating of the treatment gas 7 is arranged in each treatment field or half-field.
  • a central heating system 26 is provided, which in turn comprises a central combustion chamber 26a and a central heat exchanger 26b.
  • the hot sides of the heat exchangers 25 in the individual treatment fields are connected to the central combustion chamber 26 a of the central heating system 26 via a ring line, which is formed here with flow and return lines 11 a 11 b.
  • the hot loop air generated in the combustion chamber 26a is stationary the individual heat exchangers via actuators 27 as needed for indirect heating of the treatment gas available.
  • fresh air 18 is heated by means of the hot exhaust air 15 of the treatment fields and fed as supply air via lines 28 to the treatment fields.
  • the exhaust air used in the heat exchanger 26b is discharged, optionally after filtering, as exhaust air 19.
  • the treatment gas is adjusted by mixing the preheated supply air 8 with the circulating circulating air 9, before it is indirectly heated in the heat exchanger to the required temperature of, for example, 200 ° C.
  • the unused ring air is returned to the central combustion chamber 26a.
  • flow and return lines 11a, 11b of course, only a single loop could be provided.
  • the individual treatment fields are arranged according to a parallel connection, when using a line, this corresponds to a series connection of the treatment fields. It would also be conceivable that the flow and return lines 11a, 11b are merged after the last treatment field to form a line.
  • the last treatment field can again be followed by a cooling field in order to preheat the fresh air upstream of the heat exchanger 26b.
  • the device for heat treatment of the web further comprises the above-described control device.
  • the central heating system may be in communication with all of the treatment fields of the web-like web heat-treating device, or may cover only a part of the device, such as the front or back half. However, it is also conceivable that a first, central heating system for the front half and a second, central heating system for the rear half is provided.
  • a suction zone for the web is provided, this is particularly suitable for preheating the fresh air.

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

Description

Die Erfindung betrifft eine Vorrichtung sowie ein Verfahren zur Wärmebehandlung von bahnförmigen, insbesondere textilen Warenbahnen mit mehreren, aufeinander folgenden Behandlungsfeldern.The invention relates to a device and a method for heat treatment of web-shaped, in particular textile webs with a plurality of successive treatment fields.

Gemäß der DE 100 10 842 B4 besteht die Vorrichtung zur Behandlung von Warenbahnen, insbesondere zur Trocknung von textilen Warenbahnen, im wesentlichen aus einem Gehäuse, wenigstens einem Behandlungsfeld zur Beaufschlagung der Warenbahn mit einem Behandlungsgas, Einrichtungen zum Zuführen von Frischluft in das Gehäuse und Einrichtungen zum Abführen von mit Feuchtigkeit beladener Abluft aus dem Gehäuse. In dem Behandlungsfeld ist ferner eine Mischeinrichtung vorgesehen, die ein oder mehrere Zuströmöffnungen für die zirkulierende Umluft, ein oder mehrere Zuströmöffnungen für die Frischluft sowie eine Abströmöffnung für das Behandlungsgas vorsieht und ferner Einstellmittel aufweist, durch die das im Behandlungsgas vorhandene Verhältnis von Frischluft zu zirkulierender Umluft einstellbar ist.According to the DE 100 10 842 B4 consists of the device for the treatment of webs, in particular for drying textile webs, essentially of a housing, at least one treatment field for acting on the web with a treatment gas, means for supplying fresh air into the housing and means for discharging moisture-laden exhaust air the housing. In the treatment field, a mixing device is further provided, which provides one or more inflow openings for the circulating circulating air, one or more inflow openings for the fresh air and a discharge opening for the treatment gas and further comprises adjusting means by which the present in the treatment gas ratio of fresh air circulating circulating air is adjustable.

Zudem ist im Bereich der Mischeinrichtung eine Brennereinrichtung vorgesehen, die ein Flammenleitrohr aufweist und wobei Zuströmöffnungen für die zirkulierende Umluft und die Frischluft vorgesehen sind, die konzentrisch um das Flammenleitrohr angeordnet sind. Mit Hilfe der Mischeinrichtung kann neben einem reinen Umluftbetrieb und einem reinen Frischluftbetrieb auch ein beliebiges Verhältnis von Frischluft zu zirkulierender Umluft eingestellt werden. Auf diese Weise lassen sich sehr gezielt bestimmte Verhältnisse in den einzelnen Behandlungsfeldern in Abhängigkeit ihrer Lage im Gehäuse einstellen.In addition, a burner device is provided in the region of the mixing device, which has a flame guide tube and wherein inflow openings for the circulating circulating air and the fresh air are provided, which are arranged concentrically around the flame guide tube. With the help of the mixing device can be adjusted in addition to a pure recirculation mode and a pure fresh air operation, any ratio of fresh air to circulating circulating air. In this way, very specific conditions in the individual treatment fields can be adjusted depending on their position in the housing.

Aufgrund des hohen Energieaufwands bei der Wärmebehandlung von textilen Warenbahnen ist man bestrebt, Maßnahmen zur Energieeinsparung zu ergreifen und gleichzeitig eine Steigerung der Effizienz der Wärmebehandlung zu ermöglichen.Due to the high energy consumption in the heat treatment of textile webs, efforts are being made to take measures to save energy while at the same time enabling an increase in the efficiency of the heat treatment.

In der EP 1 830 146 A1 wurde diesbezüglich eine Vorrichtung zur Wärmebehandlung von textilen Warenbahnen vorgeschlagen, die im Wesentlichen aus mehreren aufeinander folgenden Behandlungszonen besteht, die als Prallstrahlbelüftungszonen ausgebildet sind sowie Mittel zum Ableiten der Abluft der Prallstrahlbelüftungszonen aufweist. Weiterhin ist eine in Transportrichtung der Warenbahn vorgeschaltete Behandlungszone vorgesehen, die als Durchlüftungszone ausgebildet ist, wobei die Mittel zum Ableiten der Abluft der Prallstrahlbelüftungszonen an die Durchlüftungszone derart angeschlossen sind, dass die Abluft durch die Warenbahn geleitet wird.In the EP 1 830 146 A1 In this regard, a device for heat treatment of textile webs has been proposed which consists essentially of a plurality of successive treatment zones, which are designed as impact jet ventilation zones and means for deriving the exhaust air of the impact jet ventilation zones. Furthermore, an upstream in the transport direction of the web treatment zone is provided, which is designed as a ventilation zone, wherein the means for discharging the exhaust air of the impact jet ventilation zones are connected to the ventilation zone such that the exhaust air is passed through the web.

In den Prallstrahlbelüftungszonen wird das Behandlungsgas nach der üblichen Erwärmung durch eine Brennereinrichtung, auf die Warenbahn geblasen, um diese beispielsweise zu trocknen, wobei das Behandlungsgas dabei die Feuchtigkeit aufnimmt. Indem die Abluft in der vorgeschalteten Durchlüftungszone durch die Warenbahn geleitet wird, kann sich die Abluft bis auf die Kühlgrenztemperatur weiter abkühlen, wobei Energie der Warenbahn zugeführt wird. Dies bewirkt eine Effizienzsteigerung der Trocknungsleistung und eine Energieeinsparung.In the impingement jet ventilation zones, after the usual heating by a burner device, the treatment gas is blown onto the web in order to dry it, for example, whereby the treatment gas absorbs the moisture. By the exhaust air is passed through the web in the upstream aeration zone, the exhaust air can continue to cool down to the cooling limit temperature, wherein energy is supplied to the web. This causes an increase in the efficiency of the drying performance and an energy saving.

Weiterhin ist es bekannt, Abluft einem Wärmerückgewinnungssystem zu zuführen, um beispielsweise die den einzelnen Behandlungsfeldern zuzuführende Frischluft vorzuwärmen.Furthermore, it is known to supply exhaust air to a heat recovery system in order, for example, to preheat the fresh air to be supplied to the individual treatment fields.

Die US 4 516 332 A beschreibt eine Vorrichtung zur Wärmebehandlung von bahnförmigen, insbesondere textilen Warenbahnen gemäß dem Oberbegriff des Anspruches 1, wobei in jedem Behandlungsfeld ein Brenner oder Wärmetauscher vorgesehen ist. Aus der US 3 793 741 A geht eine Trocknungsvorrichtung mit einer kombinierten Strahlungs- und Konvektionsheizung hervor, die ein zentrales Aufheizsystem verwendet.The US Pat. No. 4,516,332 A describes a device for heat treatment of web-shaped, in particular textile webs according to the preamble of claim 1, wherein in each treatment field, a burner or heat exchanger is provided. From the US 3 793 741 A shows a drying device with a combined radiant and convection heating, which uses a central heating system.

Der Erfindung liegt nun die Aufgabe zugrunde, weitere Maßnahmen zur Energieeinsparung zu ergreifen.The invention is based on the object to take further measures to save energy.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Ansprüche 1 und 8 gelöst.According to the invention, this object is solved by the features of claims 1 and 8.

Die erfindungsgemäße Vorrichtung zur Wärmebehandlung von bahnförmigen, insbesondere textilen Warenbahnen besteht im Wesentlichen aus

  • mehreren aufeinander folgenden Behandlungsfeldern zur Beaufschlagung der Warenbahn mit einem Behandlungsgas,
  • Transportmitteln zum Transport der Warenbahn im ausgebreiteten Zustand durch die Behandlungsfelder,
  • Einrichtungen zum Zuführen von Zuluft zu den Behandlungsfeldern,
  • Einrichtungen zum Abführen von Abluft aus den Behandlungsfeldern,
  • einer in jedem Behandlungsfeld vorgesehenen Mischeinrichtung, die mit den Einrichtungen zum Zuführen der Zuluft in Verbindung steht und ein Stellglied aufweist, wodurch das im Behandlungsgas vorhandene Verhältnis von Zuluft zu zirkulierender Umluft einstellbar ist sowie
  • einem zentralen Aufheizsystem zum Einstellen der Temperatur des Behandlungsgases, das über eine Ringleitung mit den mehreren Behandlungsfeldern in Verbindung steht, und das zentrale Aufheizsystem zum Aufheizen der Zuluft ausgebildet ist und die Einrichtungen zum Zuführen der Zuluft durch die Ringleitung gebildet werden, die mit dem Stellglied der Mischeinrichtungen der mehreren Behandlungsfelder in Verbindung steht..
The inventive device for heat treatment of web-shaped, in particular textile webs consists essentially of
  • several successive treatment fields for loading the web with a treatment gas,
  • Transport means for transporting the web in the extended state through the treatment fields,
  • Means for supplying supply air to the treatment fields,
  • Means for removing exhaust air from the treatment fields,
  • a provided in each treatment field mixing device, which is in communication with the means for supplying the supply air and having an actuator, whereby the existing ratio in the treatment gas of supply air to circulating circulating air is adjustable and
  • a central heating system for adjusting the temperature of the treatment gas, which communicates via a loop with the plurality of treatment fields, and the central heating system is designed for heating the supply air and the means for supplying the supply air through the loop are formed with the actuator of the Mixing equipment of several treatment fields is related ..

Das erfindungsgemäße Verfahren zur Wärmebehandlung von bahnförmigen, insbesondere textilen Warenbahnen, weist im Wesentlichen folgende Verfahrensschritte auf:

  • die Warenbahn durch mehrere aufeinander folgende Behandlungsfelder transportiert wird und in den Behandlungsfeldern mit einem Behandlungsgas beaufschlagt wird,
  • jedem Behandlungsfeld wird Zuluft zugeführt,
  • Abluft wird aus den Behandlungsfeldern abgeführt,
  • das Behandlungsgas wird in jedem Behandlungsfeld durch Mischen von Zuluft mit zirkulierender Umluft eingestellt und
  • die Temperatur des Behandlungsgases wird über ein zentrales Aufheizsystem eingestellt, das über eine Ringleitung mit den mehreren Behandlungsfeldern in Verbindung steht und die Zuluft über das zentrale Aufheizsystem aufgeheizt und über die Ringleitung den einzelnen Behandlungsfeldern zugeführt und überschüssige Zuluft zum zentralen Aufheizsystem rückgeführt wird..
The method according to the invention for the heat treatment of web-like, in particular textile, webs essentially comprises the following method steps:
  • the web is transported through several successive treatment fields and is treated in the treatment fields with a treatment gas,
  • supply air is supplied to each treatment field,
  • Exhaust air is removed from the treatment fields,
  • the treatment gas is adjusted in each treatment field by mixing supply air with circulating circulating air and
  • the temperature of the treatment gas is adjusted via a central heating system, which is connected via a loop to the several treatment fields and the supply air is heated via the central heating system and fed via the loop to the individual treatment fields and excess supply air is recycled to the central heating system.

Bei den bisher bekannten Vorrichtungen zur Wärmebehandlung von bahnförmigen, insbesondere textilen Warenbahnen wird das Behandlungsgas durch Brennereinrichtungen, die in jedem Behandlungsfeld angeordnet sind, auf die erforderliche Temperatur gebracht.In the hitherto known devices for heat treatment of web-shaped, in particular textile webs, the treatment gas is brought to the required temperature by burner devices which are arranged in each treatment field.

Hierbei musste in Kauf genommen werden, dass die Brennereinrichtungen in verschiedenen Behandlungsfeldern teilweise mit unterschiedlicher Leistung betrieben werden müssen. Außerdem kann die erforderliche Wärmeleistung, insbesondere durch die Eigenschaften der Warenbahn und/oder einem sich ändernden Verhältnis von Zuluft und zirkulierender Umluft, variieren, sodass die Brennereinrichtungen nicht immer im optimalen Betriebspunkt betrieben werden können und dadurch oftmals ihre volle Effizienz nicht ausschöpfen können.It had to be accepted that the burner devices in different treatment fields have to be partly operated with different power. In addition, the required heat output, in particular by the properties of the web and / or a changing ratio of supply air and circulating circulating air, vary, so that the burner devices can not always be operated at the optimum operating point and thereby often can not exploit their full efficiency.

Durch das Vorsehen einer zentralen Aufheizeinrichtung in Verbindung mit einer Ringleitung, kann die für die Einstellung der Temperatur des Behandlungsgases erforderliche Wärme zentral erzeugt werden. Jede Behandlungseinrichtung nimmt nur die erforderliche Wärmemenge ab, wobei die nicht abgenommene Wärmemenge über die Ringleitung zurückgeführt wird. Auf diese Weise kann die zentrale Aufheizeinrichtung, insbesondere eine zentrale Brennkammer, immer im optimalen Regelbereich gefahren werden, wodurch ein vollständigerer Ausbrand und eine bessere Energieausnutzung gewährleistet wird. Des weiteren ergibt sich durch das Ersetzen der Vielzahl von Brennern (in den einzelnen Behandlungsfeldern) durch ein zentrales Aufheizsystem eine deutliche Kostenersparnis.By providing a central heating device in conjunction with a loop, the heat required to adjust the temperature of the treatment gas can be generated centrally. Each treatment device only removes the required amount of heat, with the amount of heat that has not been removed being returned via the loop. In this way, the central heating device, in particular a central combustion chamber, always be driven in the optimal control range, whereby a more complete burnout and better energy utilization is ensured. Furthermore, results from the Replacing the plurality of burners (in the individual treatment fields) by a central heating system a significant cost savings.

Weiterhin ist das zentrale Aufheizsystem zum Aufheizen der Zuluft ausgebildet und die Einrichtungen zum Zuführen der Zuluft werden durch die Ringleitung gebildet, die wiederum mit den Mischeinrichtungen der mehreren Behandlungsfelder in Verbindung steht. Hierdurch wird die Zuluft zentral aufgeheizt und über die Ringleitung den einzelnen Behandlungsfeldern zugeführt, während überschüssige Zuluft zum zentralen Aufheizsystem zurückgeführt wird.Furthermore, the central heating system is designed for heating the supply air and the means for supplying the supply air are formed by the loop, which in turn is in communication with the mixing means of the plurality of treatment fields. As a result, the supply air is heated centrally and fed via the loop to the individual treatment fields, while excess supply air is returned to the central heating system.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.

Eine weitere Aufheizung des Behandlungsstromes in den einzelnen Behandlungsfeldern ist dann nicht mehr nötig. Über die Mischeinrichtungen in Verbindung mit einer geeigneten Steuerung lässt sich die Temperatur des Behandlungsgases dadurch wesentlich präziser, als durch separate, in den Behandlungsfeldern angeordnete Brennereinrichtungen einstellen.Further heating of the treatment stream in the individual treatment fields is then no longer necessary. By means of the mixing devices in conjunction with a suitable control, the temperature of the treatment gas can thereby be set much more precisely than by separate burner devices arranged in the treatment fields.

Gemäß einem zweiten Ausführungsbeispiel der Erfindung umfassen die Behandlungsfelder jeweils einen Wärmetauscher zum Aufheizen des Behandlungsgases, wobei die Wärmetauscher der Behandlungsfelder auf ihrer heißen Seite über die Ringleitung mit dem zentralen Aufheizsystem in Verbindung stehen. Durch diese Ausführung ist eine indirekte Erwärmung des Behandlungsgases möglich, die sich insbesondere für die Wärmebehandlung von empfindlichen, textilen Warenbahnen eignet, die keinem Rauchgas ausgesetzt werden dürfen.According to a second embodiment of the invention, the treatment fields each comprise a heat exchanger for heating the treatment gas, the heat exchangers of the treatment fields being connected on their hot side via the loop to the central heating system. By this embodiment, an indirect heating of the treatment gas is possible, which is particularly suitable for the heat treatment of delicate, textile webs that must not be exposed to flue gas.

Beim zweiten Ausführungsbeispiel kann das zentrale Aufheizsystem eine erste Aufheizeinrichtung, insbesondere eine Brennkammer, und eine zweite Aufheizeinrichtung, insbesondere einen Wärmetauscher, aufweisen, wobei

  • die erste Aufheizeinrichtung zum Aufheizen von Ringluft ausgebildet und über die Ringleitung an die heiße Seite der Wärmetauscher in den mehreren Behandlungsfeldern angeschlossen ist und
  • die zweite Aufheizeinrichtung zum Aufheizen der Zuluft ausgebildet ist und über die Einrichtungen zum Zuführen der Zuluft mit den Mischeinrichtungen der mehreren Behandlungsfelder in Verbindung steht.
In the second embodiment, the central heating system may include a first heating device, in particular a combustion chamber, and a second heating device, in particular a heat exchanger, wherein
  • the first heating device is designed for heating ring air and is connected via the ring line to the hot side of the heat exchangers in the plurality of treatment fields and
  • the second heating device is designed for heating the supply air and communicates via the means for supplying the supply air with the mixing devices of the plurality of treatment fields.

Gemäß einer weiteren Ausgestaltung weist das zentrale Aufheizsystem einen Anschluss zum Zuführen von Frischluft auf. Weiterhin kann den Behandlungsfeldern ein mit Frischluft betriebenes Kühlfeld nachgeschaltet sein, welches einen Anschluss zum Zuführen von Frischluft und einen mit dem zentralen Aufheizsystem in Verbindung stehenden Anschluss zum Abführen von vorgewärmter Frischluft aufweist.According to a further embodiment, the central heating system has a connection for supplying fresh air. Furthermore, the treatment fields can be followed by a fresh air-operated cooling field, which has a connection for supplying fresh air and a connection connected to the central heating system for discharging preheated fresh air.

Über eine Steuervorrichtung kann das zentrale Aufheizsystem in Abhängigkeit wenigstens eines Parameters der in den Behandlungsfeldern entstehenden Abluft, insbesondere in Abhängigkeit des Kohlenstoffgehalts, und/oder der Feuchte und/oder der Temperatur der Zuluft, gesteuert werden.Via a control device, the central heating system can be controlled as a function of at least one parameter of the exhaust air produced in the treatment fields, in particular as a function of the carbon content, and / or the humidity and / or the temperature of the supply air.

Weitere Vorteile und Ausgestaltungen der Erfindung werden anhand der nachfolgenden Beschreibung und der Zeichnungen näher erläutert.Further advantages and embodiments of the invention will be explained in more detail with reference to the following description and the drawings.

In der Zeichnung zeigen

Fig. 1a bis c
schematische Schaltbilder der erfindungsgemäßen Vorrichtung zur Wärmebehandlung von textilen Warenbahnen gemäß einer ersten Ausgestaltung der Erfindung,
Fig. 2a bis c
schematische Schaltbilder der erfindungsgemäßen Vorrichtung zur Wärmebehandlung von textilen Warenbahnen gemäß einer zweiten Ausgestaltung der Erfindung,
Fig. 3
eine dreidimensionale, schematische Darstellung des letzten Behandlungsfeldes und
Fig.4
eine schematische Draufsicht im Bereich unterhalb des Düsensystems des letzten Behandlungsfeldes.
In the drawing show
Fig. 1a to c
schematic circuit diagrams of the device according to the invention for the heat treatment of textile webs according to a first embodiment of the invention,
Fig. 2a to c
schematic circuit diagrams of the device according to the invention for the heat treatment of textile webs according to a second embodiment of the invention,
Fig. 3
a three-dimensional, schematic representation of the last treatment field and
Figure 4
a schematic plan view in the area below the nozzle system of the last treatment field.

In den Fig. 1a bis 1c ist ein erstes Ausführungsbeispiel der Erfindung schematisch dargestellt. Es handelt sich hierbei beispielsweise um eine Vorrichtung zur Wärmebehandlung von textilen Warenbahnen. Bei den Warenbahnen kann es sich beispielsweise auch um Non Wovens, Beschichtungen von textilen Trägern, wie Teppichrückenbeschichtungen, Kunstleder und dgl., handeln. Im Rahmen der Erfindung kommen aber auch andere, nicht textile, bahnförmige Warenbahnen in Betracht.In the Fig. 1a to 1c a first embodiment of the invention is shown schematically. This is, for example, a device for heat treatment of textile webs. The webs may also be, for example, nonwovens, coatings of textile supports such as carpet backings, artificial leather and the like. In the context of the invention, however, other, non-textile, web-shaped webs come into consideration.

Sie besteht aus mehreren aufeinander folgenden Behandlungsfeldern 1 bis 3, die jeweils in Halbfelder 1a, 1b; 2a, 2b; 3a, 3b aufgeteilt sind, wobei das letzte Behandlungsfeld 3 in Fig. 3 in einer dreidimensionalen Darstellung gezeigt ist. Im Rahmen der Erfindung können selbstverständlich auch mehr oder weniger Behandlungsfelder vorgesehen werden. Eine textile Warenbahn 4 wird durch lediglich mit Pfeilen schematisch angedeutete Transportmittel 4a im ausgebreiteten Zustand durch die Behandlungsfelder transportiert. In den Behandlungsfeldern sind Prallstrahlbelüftungszonen mit unteren und oberen Düsensystemen 5, 6 ausgebildet, die sich über die gesamte Breite der Warenbahn erstrecken, so dass die Warenbahn sowohl von oben, als auch von unten mit einem Behandlungsgas 7 beaufschlagt wird.It consists of several successive treatment fields 1 to 3, each in half fields 1a, 1b; 2a, 2b; 3a, 3b are divided, wherein the last treatment field 3 in Fig. 3 is shown in a three-dimensional representation. In the context of the invention, of course, more or fewer treatment fields can be provided. A textile material web 4 is transported through the treatment fields by means of transport means 4a, which are indicated schematically only by arrows, in the expanded state. In the treatment fields impact jet ventilation zones with lower and upper nozzle systems 5, 6 are formed, which extend over the entire width of the web, so that the web is acted upon both from above and from below with a treatment gas 7.

Anhand des Behandlungsfeldes 1 in Fig. la wird im folgenden die Funktionsweise der Behandlungsfelder näher erläutert:

  • Das Behandlungsgas 7 setzt sich aus einem bestimmten Verhältnis von Zuluft 8 und zirkulierender Umluft 9 zusammen, wobei die Zuluft 8 in einem zentralen Aufheizsystem 10 (Fig.1c) aufgeheizt und über eine Ringleitung 11 den einzelnen Behandlungsfeldern 1 bis 3 zugeführt wird. Über einen temperaturgesteuerten Regler 12 wird ein vor einer Mischeinrichtung 13b angeordnetes Stellglied 13a angesteuert, um die Temperatur des Behandlungsgases 7 durch Zumischung von heißer Zuluft 8 auf einem vorgegebenen Niveau von beispielsweise 200 °C zu halten. Je nach Art der Behandlung können in den einzelnen Behandlungsfeldern auch unterschiedliche Temperaturen eingestellt werden.
With reference to the treatment field 1 in Fig. La, the operation of the treatment fields is explained in more detail below:
  • The treatment gas 7 is composed of a certain ratio of supply air 8 and circulating circulating air 9, wherein the supply air 8 in a central heating system 10 (FIG. Figure 1C ) is heated and fed via a ring line 11 the individual treatment fields 1 to 3. Via a temperature-controlled controller 12, an actuator 13a arranged in front of a mixing device 13b is actuated in order to maintain the temperature of the treatment gas 7 at a predetermined level of, for example, 200 ° C. by admixing hot supply air 8. Depending on the type of treatment, different temperatures can also be set in the individual treatment fields.

Das Behandlungsgas 7 wird mittels ein oder mehrerer Ventilatoren 14 über die unteren und oberen Düsensysteme 5, 6 auf die Warenbahn 4 aufgebracht. Die dem Behandlungsgas zugeführte Menge an Zuluft 8 wird in entsprechender Menge in Form von Abluft 15 über eine zentrale Einrichtung 16 abgeführt.The treatment gas 7 is applied to the web 4 by means of one or more fans 14 via the lower and upper nozzle systems 5, 6. The amount of supply air 8 supplied to the treatment gas is discharged in a corresponding amount in the form of exhaust air 15 via a central device 16.

Alle weiteren Halbfelder 1b bis 3a sind in analoger Weise aufgebaut, wobei die Zuführung des Behandlungsgases zu den Düsensystemen 5, 6 bei aufeinanderfolgenden Halbfeldern immer abwechselnd von der einen bzw. anderen Seite erfolgt.All other half-fields 1b to 3a are constructed in an analogous manner, wherein the supply of the treatment gas to the nozzle systems 5, 6 always takes place alternately from one side or the other in successive half-fields.

Im letzten Halbfeld 3b ist das zentrale Aufheizsystem 10 zum Aufheizen der Zuluft untergebracht, das über die Ringleitung 11 mit den Mischeinrichtungen 13b der Behandlungsfelder 1 bis 3 in Verbindung steht. Sie besteht im dargestellten Ausführungsbeispiel im Wesentlichen aus einer zentralen Brennkammer 10a und einem zentralen Wärmetauscher 10b, wobei die beiden Enden der Ringleitung 11 an die Brennkammer 10a angeschlossen sind, sodass nicht verbrauchte Zuluft zum zentralen Aufheizsystem 10 zurückgeführt wird und erneut verwendet werden kann.In the last half-field 3b, the central heating system 10 is accommodated for heating the supply air, which communicates via the ring line 11 with the mixing devices 13b of the treatment fields 1 to 3. It consists in the illustrated embodiment essentially of a central combustion chamber 10a and a central heat exchanger 10b, the two ends of the loop 11 are connected to the combustion chamber 10a, so that unused supply air to the central heating system 10 is returned and can be used again.

Das zentrale Aufheizsystem weist außerdem einen am Wärmetauscher 10b vorgesehenen Anschluss 17 zum Zuführen von Frischluft 18 auf. Der Wärmetauscher ist ferner mit den Einrichtungen 16 zum Abführen der Abluft 15 verbunden, sodass die über den Anschluss 17 zugeführte Frischluft 8 mit den Abgasen 15 aus den Behandlungsfeldern vorgewärmt wird, bevor die Frischluft in der Brennkammer 10a aufgegeben wird.The central heating system also has a connection 17 for supplying fresh air 18 provided on the heat exchanger 10b. The heat exchanger is further connected to the means 16 for discharging the exhaust air 15, so that the supplied via the port 17 fresh air 8 is preheated with the exhaust gases 15 from the treatment fields before the fresh air is fed into the combustion chamber 10a.

Im dargestellten Ausführungsbeispiel ist dem Behandlungsfeld 3 noch ein mit der Frischluft 18 betriebenes Kühlfeld 20 nachgeschaltet, welches einen Anschluss 20a zum Zuführen der Frischluft 18 und einen mit dem zentralen Aufheizsystem 10 in Verbindung stehenden Anschluss 20b zum Abführen von vorgewärmter Frischluft aufweist. Das Kühlfeld 20 kann wahlweise als Prallstrahlbelüftungszone 20c oder als Durchlüftungszone 20d ausgebildet sein, wobei die Frischluft entweder von oben und unten auf die Warenbahn 4 aufgeblasen wird (Prallstrahlbelüftungszone 20c) oder die Frischluft durch die Warenbahn 4 gedrückt und/oder gesaugt wird (Durchlüftungszone 20d).In the illustrated embodiment, the treatment field 3 is still a downstream of the fresh air 18 cooled box 20 downstream, which has a connection 20a for supplying the fresh air 18 and a communicating with the central heating system 10 connection 20b for discharging preheated fresh air. The cooling field 20 may optionally be designed as a baffle ventilation zone 20c or as a ventilation zone 20d, wherein the fresh air is either inflated from above and below onto the material web 4 (impact jet ventilation zone 20c) or the fresh air is forced through the material web 4 and / or drawn in (aeration zone 20d). ,

Die Steuerung des zentralen Aufheizsystems erfolgt über eine nur schematisch angedeutete Steuereinrichtung (siehe Fig. 1b). So wird beispielsweise der Druck in der Ringleitung 11 nach dem letzten, angeschlossenen Halbfeld über einen Drucksensor 22 gemessen und zur Regelung der Frischluftmenge verwendet. Weiterhin wird die Brennkammer 10a in Abhängigkeit wenigstens eines Parameters der Abluft, insbesondere in Abhängigkeit des Kohlenstoffgehalts und/oder der Feuchte und/oder der Temperatur der Zuluft 8 angesteuert, wobei sowohl Verbrennungsluft 10c, Brennstoff 10d und Frischluftmenge geregelt werden können.The control of the central heating system via an only schematically indicated control device (see Fig. 1b ). For example, the pressure in the loop 11 is measured after the last, connected half-field via a pressure sensor 22 and used to control the amount of fresh air. Furthermore, the combustion chamber 10a is controlled as a function of at least one parameter of the exhaust air, in particular as a function of the carbon content and / or the humidity and / or the temperature of the supply air 8, wherein both combustion air 10c, fuel 10d and fresh air quantity can be controlled.

Ist beispielsweise der Kohlenstoffgehalt zu groß, wird die Abluftmenge und in Folge die Verbrennungsgasmenge erhöht bzw. bei einem zu geringen Gehalt entsprechend verringert. Über geeignete Regler wird die Vorrichtung in den vorgegebenen Sollbereichen bzw. mit vorgegebenen Sollwerten gefahren.For example, if the carbon content is too large, the amount of exhaust air and consequently the amount of combustion gas is increased or correspondingly reduced if the content is too low. By means of suitable regulators, the device is driven in the predetermined nominal ranges or with predetermined nominal values.

Die gesamte Vorrichtung ist innerhalb eines Gehäuses 24 untergebracht, wobei insbesondere auch die Ringleitung 11 und die zentralen Einrichtungen 16 zum Abführen der Abluft und das zentrale Aufheizsystem innerhalb des Gehäuses angeordnet sind. Das zentrale Aufheizsystem wird vorzugsweise unterhalb der Düsensysteme 5, 6 des in Transportrichtung (Pfeil 4a) letzten Behandlungsfeldes 3 angeordnet. Wie insbesondere aus den Fig. 3 und 4 hervorgeht, können die Brennkammer 10a und der Wärmetauscher unterhalb des unteren Düsensystems 5 eingebaut werden. Auch für die Mischeinrichtung 13b des letzten Behandlungsfeldes verbleibt noch ausreichend Platz. Auf diese Weise entsteht eine sehr kompakte Vorrichtung.The entire device is housed within a housing 24, wherein in particular the ring line 11 and the central means 16 for discharging the exhaust air and the central heating system within the housing are arranged. The central heating system is preferably arranged below the nozzle systems 5, 6 of the last treatment field 3 in the transport direction (arrow 4a). As in particular from the Fig. 3 and 4 As can be seen, the combustion chamber 10a and the heat exchanger below the lower nozzle system 5 can be installed. There is still sufficient space for the mixing device 13b of the last treatment field. This creates a very compact device.

Beim oben beschriebenen Ausführungsbeispiel setzt sich die mittels Ventilator 23 über die Ringleitung 11 den einzelnen Behandlungsfeldern zugeführte Zuluft aus Rauchgas der Brennkammer 10a, rezirkulierter Zuluft und Frischluft zusammen. Für besonders empfindliche Warenbahnen ist das enthaltene Rauchgas jedoch nachteilig. Für diesen Anwendungsfall wird daher im folgenden ein zweites Ausführungsbeispiel mit einer indirekten Aufheizung der Umluft beschrieben.In the embodiment described above, the supplied by means of fan 23 via the loop 11 to the individual treatment fields supplied supply air from flue gas of the combustion chamber 10a, recirculated supply air and fresh air together. For particularly sensitive webs, however, the flue gas contained is disadvantageous. For this application, therefore, a second embodiment with an indirect heating of the circulating air will be described below.

Grundsätzlich ist natürlich denkbar, dass man anstelle der Brennkammer 10a einen entsprechend groß dimensionierten Wärmetauscher vorsieht. Da die Temperatur der Zuluft in der Ringleitung jedoch im Bereich von 250 bis 350°C liegen sollte, ist dies nach heutigem Stand aufgrund der Verluste über die Ringleitung nicht rentabel.In principle, of course, it is conceivable that instead of the combustion chamber 10a, a correspondingly large-sized heat exchanger is provided. However, since the temperature of the supply air in the loop should be in the range of 250 to 350 ° C, this is not profitable at present due to the losses over the loop.

Anhand der Fig. 2a bis 2c wird daher vorgeschlagen, dass in jedem Behandlungsfeld bzw. Halbfeld jeweils ein Wärmetauscher 25 zum indirekten Aufheizen des Behandlungsgases 7 angeordnet wird. Nach wie vor ist jedoch ein zentrales Aufheizsystem 26 vorgesehen, welches wiederum eine zentrale Brennkammer 26a und einen zentralen Wärmetauscher 26b umfasst.Based on Fig. 2a to 2c Therefore, it is proposed that in each treatment field or half-field in each case a heat exchanger 25 for indirect heating of the treatment gas 7 is arranged. However, as before, a central heating system 26 is provided, which in turn comprises a central combustion chamber 26a and a central heat exchanger 26b.

Die heißen Seiten der Wärmetauscher 25 in den einzelnen Behandlungsfeldern stehen über eine Ringleitung, die hier mit Vorlauf- und Rücklaufleitungen 11a 11b, ausgebildet ist, mit der zentralen Brennkammer 26a des zentralen Aufheizsystems 26 in Verbindung. Die in der Brennkammer 26a erzeugte heiße Ringleitungsluft steht den einzelnen Wärmetauschern über Stellglieder 27 je nach Bedarf zum indirekten Aufheizen des Behandlungsgases zur Verfügung.The hot sides of the heat exchangers 25 in the individual treatment fields are connected to the central combustion chamber 26 a of the central heating system 26 via a ring line, which is formed here with flow and return lines 11 a 11 b. The hot loop air generated in the combustion chamber 26a is stationary the individual heat exchangers via actuators 27 as needed for indirect heating of the treatment gas available.

Im zentralen Wärmetauscher 26b wird Frischluft 18 mittels der heißen Abluft 15 der Behandlungsfelder aufgeheizt und als Zuluft über Leitungen 28 den Behandlungsfeldern zugeführt. Die im Wärmetauscher 26b genutzte Abluft wird, gegebenenfalls nach Filterung, als Fortluft 19 ausgeschleust.In the central heat exchanger 26 b fresh air 18 is heated by means of the hot exhaust air 15 of the treatment fields and fed as supply air via lines 28 to the treatment fields. The exhaust air used in the heat exchanger 26b is discharged, optionally after filtering, as exhaust air 19.

Wie schon beim ersten Ausführungsbeispiel wird das Behandlungsgas durch Mischung der vorgewärmten Zuluft 8 mit der zirkulierenden Umluft 9 eingestellt, bevor es im Wärmetauscher auf die erforderliche Temperatur von beispielsweise 200°C indirekt erwärmt wird.As in the first embodiment, the treatment gas is adjusted by mixing the preheated supply air 8 with the circulating circulating air 9, before it is indirectly heated in the heat exchanger to the required temperature of, for example, 200 ° C.

Die nicht verbrauchte Ringluft wird wieder zur zentralen Brennkammer 26a zurückgeführt. Anstelle von Vorlauf- und Rücklaufleitungen 11a, 11b könnte natürlich auch nur eine einzelne Ringleitung vorgesehen werden. Bei Verwendung von zwei Leitungen sind die einzelnen Behandlungsfelder entsprechend einer Parallelschaltung angeordnet, bei Verwendung von einer Leitung entspricht dies einer Hintereinanderschaltung der Behandlungsfelder. Auch wäre es denkbar, dass die Vorlauf- und Rücklaufleitungen 11a, 11b nach dem letzten Behandlungsfeld zu einer Leitung zusammengeführt werden.The unused ring air is returned to the central combustion chamber 26a. Instead of flow and return lines 11a, 11b, of course, only a single loop could be provided. When using two lines, the individual treatment fields are arranged according to a parallel connection, when using a line, this corresponds to a series connection of the treatment fields. It would also be conceivable that the flow and return lines 11a, 11b are merged after the last treatment field to form a line.

In analoger Weise zum ersten Ausführungsbeispiel kann dem letzten Behandlungsfeld wiederum ein Kühlfeld nachgeschaltet sein, um die Frischluft vor dem Wärmetauscher 26b vorzuwärmen.In a manner analogous to the first exemplary embodiment, the last treatment field can again be followed by a cooling field in order to preheat the fresh air upstream of the heat exchanger 26b.

Im übrigen ist das zentrale Aufheizsystem wiederum unterhalb des Düsensystems des letzten Behandlungsfeldes angeordnet. Die Vorrichtung zur Wärmebehandlung der Warenbahn weist außerdem die oben beschriebene Steuereinrichtung auf.Moreover, the central heating system is in turn arranged below the nozzle system of the last treatment field. The device for heat treatment of the web further comprises the above-described control device.

Das zentrale Aufheizsystem kann mit allen Behandlungsfeldern der Vorrichtung zur Wärmebehandlung von bahnförmigen Warenbahnen in Verbindung stehen, oder nur einen Teil der Vorrichtung, beispielsweise die vordere oder hintere Hälfte, abdecken. Es ist aber auch denkbar, dass ein erstes, zentrales Aufheizsystem für die vordere Hälfte und ein zweites, zentrales Aufheizsystem für die hintere Hälfte vorgesehen wird.The central heating system may be in communication with all of the treatment fields of the web-like web heat-treating device, or may cover only a part of the device, such as the front or back half. However, it is also conceivable that a first, central heating system for the front half and a second, central heating system for the rear half is provided.

Ist am Anfang der Vorrichtung eine Durchsaugzone für die Warenbahn vorgesehen, eignet sich diese in besonderem Maße zur Vorwärmung der Frischluft.If at the beginning of the device a suction zone for the web is provided, this is particularly suitable for preheating the fresh air.

Claims (8)

  1. Device for thermally processing web-like fabric webs (4) having
    - a plurality of successive processing fields (1, 2, 3) for acting on the fabric web with a processing gas (7),
    - transport means (4a) for conveying the fabric web through the processing fields in the extended state,
    - devices for supplying additional air (8) to the processing fields,
    - devices (16) for discharging exhaust air (15) from the processing fields,
    - a mixing device (13b) which is provided in each processing field and which is connected to the devices for supplying the additional air and which has an adjustment member (13a ; 13), the ratio of additional air (8) to circulating recirculation air (9) present in the processing gas thereby being able to be adjusted, and
    - means for adjusting the temperature of the processing gas,
    characterised in that the means for adjusting the temperature of the processing gas have a central heating system (10, 26) which is connected to the plurality of processing fields (1, 2, 3) by means of a ring circuit (11; 11a, 11b), and in that the central heating system (10) is constructed to heat the additional air (8) and the devices for supplying the additional air are formed by the ring circuit (11), which is connected to the adjustment member (13a) of the mixing devices (13b) of the plurality of processing fields (1, 2, 3).
  2. Device according to claim 1, characterised in that the processing fields (1, 2, 3) each comprise a heat exchanger (25) for heating the processing gas (7), the heat exchangers (25) of the processing fields (1, 2) being connected to the central heating system (26) at their hot side via the ring circuit (11a).
  3. Device according to claim 2, characterised in that the central heating system (26) has a first heating device and a second heating device,
    - the first heating device being constructed for heating circuit air, and being connected via the ring circuit (11) to the hot side of the heat exchangers (25) in the plurality of processing fields (1, 2, 3) and
    - the second heating device being constructed for heating the additional air (8) and being connected to the plurality of processing fields via the devices (28) for supplying the additional air by means of an adjustment member (13) and the mixing device (13b).
  4. Device according to one or more of the preceding claims, characterised in that the central heating system (10, 26) has a connection for supplying fresh air.
  5. Device according to one or more of the preceding claims, characterised in that there is arranged, downstream of the processing fields (1, 2, 3), a cooling field (20) which is operated with fresh air (18) and which has a connection (20a) for supplying fresh air (18) and a connection (20b) which is connected to the central heating system (10, 26) for discharging preheated fresh air.
  6. Device according to one or more of the preceding claims, characterised in that there is provided a control device (21) for controlling the central heating system (10, 26) in accordance with at least one parameter of the exhaust air (15), in particular in accordance with the carbon content and/or the moisture and/or the temperature of the additional air (8).
  7. Method for thermally processing web-like fabric webs,
    - the fabric web (4) being conveyed through a plurality of successive processing fields (1, 2, 3) and acted on with a processing gas in the processing fields,
    - additional air (8) being supplied to each processing field,
    - exhaust air (15) being discharged from the processing fields,
    - the processing gas (7) being adjusted in each processing field by mixing additional air (8) with circulating recirculation air (9) and
    - the processing gas (7) being adjusted to a predetermined temperature,
    characterised in that the temperature of the processing gas (7) is adjusted by means of a central heating system (10, 26) which is connected to the plurality of processing fields by means of a ring circuit (11; 11a, 11b), and in that the additional air (8) is heated by means of the central heating system (10) and is supplied to the individual processing fields (1, 2, 3) via the ring circuit (11) and excess additional air (8) is returned to the central heating system (10) .
  8. Method according to claim 7, characterised in that, in each processing field (1, 2, 3), a heat exchanger (25) is used for heating the processing gas (7), the hot sides of the heat exchanger (25) being supplied with hot circuit air via the ring circuit (11a) as heat-carriers.
EP11151441.0A 2010-02-02 2011-01-19 Method and device for thermal treatment of webs of material Not-in-force EP2354740B1 (en)

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ES2620461T3 (en) 2017-06-28
EP2354740A2 (en) 2011-08-10
CN102192642A (en) 2011-09-21
KR20110090817A (en) 2011-08-10
EP2354740A3 (en) 2013-12-11
US20110185589A1 (en) 2011-08-04
DE102010006577A1 (en) 2011-08-04
TW201144727A (en) 2011-12-16

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