EP0137067B1 - Procédé et dispositif pour le séchage de fibres ou fils en bobines - Google Patents

Procédé et dispositif pour le séchage de fibres ou fils en bobines Download PDF

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Publication number
EP0137067B1
EP0137067B1 EP83110084A EP83110084A EP0137067B1 EP 0137067 B1 EP0137067 B1 EP 0137067B1 EP 83110084 A EP83110084 A EP 83110084A EP 83110084 A EP83110084 A EP 83110084A EP 0137067 B1 EP0137067 B1 EP 0137067B1
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EP
European Patent Office
Prior art keywords
drying
process step
yarns
vessels
fibres
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
EP83110084A
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German (de)
English (en)
Other versions
EP0137067A1 (fr
Inventor
Berthold Dipl.-Ing. Magin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MTM Obermaier GmbH and Co KG
Original Assignee
MTM Obermaier GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MTM Obermaier GmbH and Co KG filed Critical MTM Obermaier GmbH and Co KG
Priority to DE8383110084T priority Critical patent/DE3371244D1/de
Priority to EP83110084A priority patent/EP0137067B1/fr
Priority to US06/658,196 priority patent/US4590683A/en
Publication of EP0137067A1 publication Critical patent/EP0137067A1/fr
Application granted granted Critical
Publication of EP0137067B1 publication Critical patent/EP0137067B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/006—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles
    • F26B21/007—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles the objects being bobbin- or spool-like bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum

Definitions

  • the invention relates to a process for drying wound fibers or yarns with two kettles to be used alternately for the same treatment process, the fibers or yarns being heated in a first process step with an almost moisture-saturated, hot gas serving as heat transfer medium and in a second process step under vacuum are dried and these process steps are repeated alternately in the two kettles until the final drying.
  • the invention further relates to an apparatus for performing this method.
  • Such a method and a device suitable for carrying it out are known, for example, from DE-A-21 09 696.
  • This drying process takes place in such a way that, first of all, the circulating gas serving as heat carrier during the heating process for heating the fibers or yarns, for example 30 to 60 ° C and for the purpose of reducing the drying power of the gas is constantly moistened so strongly that the partial vapor pressure is approximately equal to the partial vapor pressure of the gas boundary layer on the capillary surface of the material to be dried, which in turn depends on the temperature of the material to be dried in accordance with the steam curve.
  • the textile material is heated up intensely and drying is prevented at the same time.
  • the boiler is then evacuated so that, due to the lowering of the boiling point, the water stored in the fibers or yarns evaporates and is sucked off with the vacuum pump.
  • This process i.e. the alternating heating with moist, hot gas and the subsequent drying under vacuum is repeated until the fibers or yarns have dried sufficiently.
  • the known drying device consists of two boilers in which the two processes take place alternately. Both boilers are first connected to the humidification and heating device, then to the vacuum and drying device via changeover valves. In this way, two drying processes can be carried out simultaneously in two boilers with a single machine: heater, blower and evacuation device including condenser, since whenever the blower and heater are in the circuit of the first boiler, the other boiler is connected to the evacuation device.
  • the object of the present invention is therefore to improve the method described at the outset in such a way that the moisture stored in the deeper layers of the yarns or fibers can also be removed more rapidly, so that the drying process is shortened overall.
  • This object is achieved in that during the course of the progressive drying, the moisture content of the gas is reduced in accordance with the moisture content of the fibers or yarns during the first process step, that the duration of the second process step is shortened compared to the duration of the first process step and that in a third process step at an intermediate pressure in the boiler (1, 1a) the residual moisture is transported to the surface of the fibers or yarns (2, 2a) with a warm dry gas flow.
  • the warm, dry gas flow can be supplied intermittently. This is particularly advantageous if the performance of the vacuum pump is limited.
  • the main advantage of the method according to the invention lies in the fact that the moisture stored in the deeper layers of the yarns or fibers no longer reaches the surface only due to the diffusion, but is conveyed to the outside with the help of the gas flow, but at the same time the advantages of vacuum drying , namely the reduction of the boiling point and the resulting protection of the material, are retained.
  • the sum of the duration of the second and third process steps, which take place in each boiler is chosen approximately as long as the duration of the first process step, which takes place in the other boiler, results from the considerable Reduction in the number of cycles required to completely dry the fibers or yarns while reducing the total Duration of treatment.
  • Another object of the present invention is to provide a device which, starting from the device described in the preamble of claim 5, enables a faultless, trouble-free, time-shortened operating sequence without the need for expensive additional units.
  • This object is achieved in that the part used between the switching flaps, consisting of blower, humidifier and heater, additionally receives a cooler and a water separator, and that a controllable bypass is arranged parallel to the switching flaps.
  • a high-frequency heater can be arranged in the boiler to support the drying process, in particular under vacuum or full vacuum.
  • Dried material is used in each of the two boilers 1, a, for example in the form of coils 2, 2a.
  • the boilers 1, 1a are connected to heating circuits 3, 3a and to evacuation lines 12, 12a.
  • the two heating circuits 3, 3a can alternatively be connected via switch flaps 13, 13a to a two common part with blower 4, heater 5, compressed air source 8 and humidifier 18. Saturated steam is generally used to humidify the drying gas.
  • the evacuation lines 12, 12a are connected via vacuum flaps 11, 11a to an evacuation device 16 with an upstream condenser 15. Finally, ventilation and venting valves 10, 10a are provided on the boilers 1, 1a. With the help of the switchover elements 14, 14a used, a switchover can take place such that the yarn packages 2, 2a are preferably dried on the outside or on the inside.
  • Controllable bypass lines 9, 9a are located parallel to the upper switching flaps 13, 13a. With the help of these bypass lines 9, 9a, part of the heated gas flow can be branched out of the heating circuit and fed to the currently evacuated boiler 1a.
  • the drying process according to the invention proceeds as follows using the device shown. After the wet yarn packages 2, 2a coming from the dyeing plant have been inserted into the boilers 1, 1a, they are first mechanically dewatered with compressed air and then heated with moist, warm gas. For this purpose, the blower 4 pushes the drying gas, generally air, through the heater 5, where it is heated and optionally humidified by the supply of steam in the humidifier 18. This moist hot gas flows through the boiler 1a and the yarn spool 2a in a circuit in the position of the switching flaps 13, 13a shown. If the gas is too hot or too heavily loaded with moisture, it can be cooled in the cooler 6 and the water which separates out can be removed from the water separator 7. This cooling and dehumidification of the drying gas takes place in accordance with the degree of drying of the fibers or yarns 2, 2a.
  • Such a heating cycle takes six minutes, for example. It is carried out with practically moisture-saturated air at approx. 125 ° C, e.g. if dyed cotton or polyester can be treated. Due to the rather short cycle times, despite the high gas temperature, the textile goods only become harmless temperatures, e.g. max. 85 ° C.
  • the vacuum flaps 11, 11a are in the position shown, i.e. the boiler 1 is switched to vacuum.
  • the switching flaps 13, 13a and the vacuum flaps 11, 11a are switched over, so that the yarns 2 in the left boiler 1 are now heated and the yarns 2a in the right boiler 1a are evacuated and dried.
  • the drying process under vacuum comes to a standstill after a relatively short time, for example after about a minute. This is due to the fact that the moisture present on the surface of the yarn package 2 evaporates and that the moisture present in the deeper layers of the yarn package 2 only has to diffuse to the surface gradually.
  • the bypass 9 is opened slightly after about one minute.
  • part of the warm air flows into the boiler 1, whereupon an intermediate pressure is established there.
  • This dry, warm gas flow flows through the yarn spool 2 and thereby transports the moisture stored in the deeper layers to the surface, where it evaporates as a result of the lowering of the boiling point due to the pressure reduction and is transported via the line 12 into the vacuum condenser 15.
  • the direction of flow through the yarn bobbins 2, 2a can be set with the changeover elements 14, 14a, the flow predominantly being directed from the outside inwards.
  • the bypass 9, 9a can remain open during the third process step. If the vacuum pump 16 has only a relatively low performance, it is advisable to bypass 9 to open and close alternately so that the pressure in the boiler 1, 1a drops again and again to the desired intermediate value.
  • a high-frequency drying device 17, 17a can be arranged in the boilers 1, 1a a to support the drying, in particular during the second and third method step.
  • the arrangement of the cooler 6 and the water separator 7 has yet another advantage. It is possible, for example, to supply cooling water which is supplied to the vacuum condenser 15 at approximately 10 ° C. and leaves it at approximately 35 ° C. directly to the cooler 6 in order to cool and dehumidify the drying and heating gas. At the exit of the cooler 6, this water can be removed at a temperature of about 60 0 C. This heated water can then be used as process water, for example in a connected dyeing plant.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (6)

1. Procédé pour le séchage de fibres ou fils (2, 2a) en bobines à l'aide de deux chaudières (1, 1a) destinées à être utilisées alternativement pour un même processus de traitement, les fibres ou fils (2, 2a) étant, dans une première étape du procédé, chauffés par un gaz chaud servant de caloporteur et quasiment saturé en humidité, et séchés sous vide dans une deuxième étape du procédé, et ces étapes étant répétées alternativement dans les deux chaudières (1, 1a) jusqu'au séchage définitif, caractérisé en ce qu'au cours de la première étape du procédé, tandis que le séchage se poursuit, la teneur en humidite du gaz est réduite conformément à la teneur en humidité des fibres ou fils (2, 2a), en ce que la durée de la deuxième étape du procédé est réduite par rapport à la durée de la première étape du procédé, et en ce que dans une troisième étape du procédé, en présence d'une pression intermédiaire dans la chaudière (1, 1a), l'humidité résiduelle est transportée sur la surface des fibres ou fils (2, 2a) avec un flux de gaz sec et chaud.
2. Procédé selon la revendication 1, caractérisé en ce que pendant la troisième étape du procédé, le flux de gaz sec et chaud est fourni de manière intermittente.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la durée de la première étape du procédé est réglée de manière à être égale au total des durées de la deuxième et de la troisième étape du procédé.
4. Procédé selon la revendication 1, 2 ou 3, caractérisé en ce qu'à la suite de leur introduction dans les chaudières (1, la), les fibres ou fils (2, 2a) sont asséchés mécaniquement par de l'air comprimé préalablement chauffé.
5. Dispositif pour le séchage de fibres ou fils selon la revendication 1, 2, 3 ou 4, avec deux chaudières (1, 1a) destinées à être utilisées alternativement pour un même processus de traitement, qui sont reliées par des conduites parallèles (12, 12a) et par l'intermédiaire de clapets de vide (11,11a) et d'un unique condenseur (15) à un appareil à faire le vide (16) commun, les circuits de fluide de séchage (3, 3a) des chaudieres (1,1a) présentant une partie commune qui relie les deux circuits (3, 3a), qui est intercalée entre deux clapets de commutation (13, 13a), et qui comprend une soufflante (4), un humidificateur (18) et un appareil de chauffage (5), caractérisé en ce que la partie (4, 5, 18) intercalée entre les clapets de commutation (13, 13a) comprend en outre un refroidisseur (6) et un séparateur d'eau (7), et en ce qu'une dérivation (9, 9a) asservissable est montée en parallèle avec les clapets de dérivation (13, 13a).
6. Dispositif selon la revendication 5, caractérisé en ce que des appareils de chauffage à haute fréquence (17, 17a) sont en outre disposés dans les chaudières (1, 1a).
EP83110084A 1983-10-08 1983-10-08 Procédé et dispositif pour le séchage de fibres ou fils en bobines Expired EP0137067B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8383110084T DE3371244D1 (en) 1983-10-08 1983-10-08 Process and apparatus for drying yarn or fibre packages
EP83110084A EP0137067B1 (fr) 1983-10-08 1983-10-08 Procédé et dispositif pour le séchage de fibres ou fils en bobines
US06/658,196 US4590683A (en) 1983-10-08 1984-10-05 Method of and apparatus for drying wound fiber or yarn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83110084A EP0137067B1 (fr) 1983-10-08 1983-10-08 Procédé et dispositif pour le séchage de fibres ou fils en bobines

Publications (2)

Publication Number Publication Date
EP0137067A1 EP0137067A1 (fr) 1985-04-17
EP0137067B1 true EP0137067B1 (fr) 1987-04-29

Family

ID=8190737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110084A Expired EP0137067B1 (fr) 1983-10-08 1983-10-08 Procédé et dispositif pour le séchage de fibres ou fils en bobines

Country Status (3)

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US (1) US4590683A (fr)
EP (1) EP0137067B1 (fr)
DE (1) DE3371244D1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2580004B1 (fr) * 1985-04-05 1987-06-26 Barriquand
JPH04132388U (ja) * 1991-05-24 1992-12-08 千住金属工業株式会社 真空乾燥装置
JPH05317828A (ja) * 1992-05-15 1993-12-03 Yoshida Kogyo Kk <Ykk> 帯状物の処理方法とその装置
US5269052A (en) * 1992-11-10 1993-12-14 Tns Mills, Inc. Yarn conditioning process
US5410788A (en) * 1992-11-10 1995-05-02 Tns Mills, Inc. Yarn conditioning process & apparatus
US5428884A (en) * 1992-11-10 1995-07-04 Tns Mills, Inc. Yarn conditioning process
US5459990A (en) * 1993-10-14 1995-10-24 Tns Mills, Inc. Facility and method for producing yarn
US5791135A (en) * 1996-06-20 1998-08-11 American & Efird, Inc. Heat treatment of textile strands prior to plying
US6094840A (en) * 1997-11-06 2000-08-01 Xorella Ag Method for the heat treatment of textiles
JP2001011738A (ja) * 1999-06-28 2001-01-16 Tsuzuki Boseki Kk スライバーの圧縮方法、及びその装置
CN1196388C (zh) * 2000-06-08 2005-04-06 松下电器产业株式会社 材料的干燥方法及其装置和使用该装置的线路板的制造方法
DE102008014961A1 (de) * 2008-03-19 2009-09-24 Then Maschinen Gmbh Verfahren zum Behandeln von Textilgut im Pack- und Aufstecksystem
JP4888575B2 (ja) * 2010-02-17 2012-02-29 日産自動車株式会社 乾燥装置及び乾燥方法
CN113007988A (zh) * 2021-04-02 2021-06-22 安徽德亚电池有限公司 一种电芯极片用烘干装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010216A (en) * 1956-11-17 1961-11-28 Nat Res Corp Apparatus for drying heat sensitive products
US3631691A (en) * 1968-05-31 1972-01-04 Friedrich W J Karrer Apparatus for liquid-treating fiber materials and drying said materials
GB1219855A (en) * 1968-08-16 1971-01-20 William Tatton & Company Ltd Improvements in methods of drying yarns and apparatus therefor
DE2010605A1 (en) * 1970-03-06 1971-09-16 Obermaier & Cie, 6730 Neustadt Fibre and yarn drying plant
DE2109696C3 (de) * 1971-03-02 1979-12-20 Obermaier Gmbh & Cie Kg, 6730 Neustadt Vorrichtung zum Trocknen von Fasern und Garnen mit 2 Kesseln
DE2417555A1 (de) * 1973-04-11 1974-10-31 Karrer System Ag Zollikon Verfahren und vorrichtung zur fluessigkeitsbehandlung und/oder trocknung von faserstoff
FR2247388B1 (fr) * 1973-10-12 1977-08-05 Anrep Rene
CH1666774A4 (fr) * 1974-12-16 1977-01-31
DE3111223A1 (de) * 1981-03-21 1982-10-07 Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar Vakuum-trockenverfahren

Also Published As

Publication number Publication date
DE3371244D1 (en) 1987-06-04
US4590683A (en) 1986-05-27
EP0137067A1 (fr) 1985-04-17

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