WO2014037509A1 - Procédé de séchage de textile à l'aide d'une pression alternative - Google Patents

Procédé de séchage de textile à l'aide d'une pression alternative Download PDF

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Publication number
WO2014037509A1
WO2014037509A1 PCT/EP2013/068479 EP2013068479W WO2014037509A1 WO 2014037509 A1 WO2014037509 A1 WO 2014037509A1 EP 2013068479 W EP2013068479 W EP 2013068479W WO 2014037509 A1 WO2014037509 A1 WO 2014037509A1
Authority
WO
WIPO (PCT)
Prior art keywords
bar
pressure
drying
water
textile
Prior art date
Application number
PCT/EP2013/068479
Other languages
English (en)
Inventor
Lilian Eva Tang Baltsen
Original Assignee
Novozymes A/S
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 Novozymes A/S filed Critical Novozymes A/S
Publication of WO2014037509A1 publication Critical patent/WO2014037509A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/08—Humidity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/36—Flow or velocity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/16—Air properties
    • D06F2105/24—Flow or velocity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/10—Drying cabinets or drying chambers having heating or ventilating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • 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 present invention relates to the field of drying fabrics.
  • the invention relates to methods of drying fabrics employing alternating pressure.
  • Laundering is in general performed by agitating the fabrics in a detergent solution for a certain period of time followed by rinsing the fabrics in water. Laundering may be carried out using an automatic washing machine or it may be done by hand.
  • Modern detergents are complex compositions comprising a number of components such as; surfactants, builders, bleaches, polymers, enzymes etc. just to mention a few, and are usually formulated as a powder or a liquid.
  • a drying device in general a device comprising a drum wherein the fabrics are loaded and where relative dry air is flowing through th drum leading to evaporation of water from the fabrics and consequently drying thereof.
  • the object is preferable a fabric such as clothes or other textiles that need washing and drying.
  • the invention relates to a method for drying an object comprising the steps:
  • the object is a fabric or a textile.
  • the wet textiles are usually subjected to a stream of relative dry air, often at an elevated temperature, at a constant pressure.
  • the exchange of air through the chamber dries out the textile by fast removal of humidity from the surface of the textile.
  • the exchange is done by air turbulence at even pressure in order to force evaporation of water from the inner fibers.
  • the drying is accompanied by tumbling or rotating the container, usually a drum, wherein the textile is contained in order to secure that all parts of the textiles are exposed to the drying air and thereby to secure a uniform drying of all the textiles in the container.
  • the whole drying process takes place inside a drying machine that may have a number of different designs based on the specific purpose and the different manufacturers.
  • freeze drying is a process that is drived by sublimation of water from its solide fase (ice). This is done at low pressure and low temperature. Radiant heating is an important factor for fast evaporation process. However, freexe drying is in general not used for drying textiles.
  • the present invention is based on the observation that when the drying operation is performed under alternating pressure a very efficient drying process can be obtained. Further, the drying process may result in a reduced energy and the mechanical wear on the textile may be reduced compared with a conventional drying process.
  • the alternating pressure affects the textile and the water phase differently, which together leads to a more uniform distribution of water throughout the textile sheets.
  • This moisture distribution in the fabric leads to that the water is preferable evaporated from the surface of the fabrics, resulting in a lower temperature of the fabric compared with a similar drying procedure under constant pressure. Further water evaporated from the surface is easier transported from the fabric compared with water evaporated from the inner of the fabrics, meaning that the process may be condicted at a more energy efficient way.
  • the textile can be considered a network of fibers arranged in a regular way and the water is located as a more or less continuous phase between the fibers.
  • the alternating of the pressure is done in small steps.
  • a change in pressure of the chamber is prepared. For example chaning the pressure from vaccum to pressure may be done by first increasing from 0,5 to 0,6 and the release this air by decreasing the pressure again to 0,5 bar; immediately after increase pressure till e.g. 0,8 bar reduce the pressure till 0,5 bar; next increase till 1 bar and escape till 0,5 bar and increase now the pressure till 2 bar over a short time period e.g.1 minute.
  • the invention may furthermore result in reduced energy consumption compared to a similar conventional drying processe taking place at constant pressures because the need for macro-mechanical action (turning the drum) may be avoided or at least reduced, and the evaporation of water may also consume reduced amount of energy for heating air, because it is easier to evaporate water from the surface of the fabrics than from the inner part of the fabrics.
  • the drying process may be performed under conditions that are gentle to the fabrics being dryed. Due to the alternating pressure and following better distribution of water, the need for tumbling is less than in a conventional dryer, where the tumbling is the main driver for distribution of fabrics and water. Further, because the alternating pressure transports water to the surface of the fabrics, a larger part of the evaporation of the water takes place from the surface of the fabrics compared with a traditional dryer, and the cooling provided by evaporation of water means that the surface of the fabrics will be less impacted by the high temperature of hot air flowing through the drum, which high temperature is known to result in inadvertent effects e.g. such as shrinking of at least some textiles. Thus the drying process of the invention may be conducted in a way that is very gentle to the fabrics and the process may therefore be used for very delicate fabrics.
  • alternating pressure generates mechanical action on a microscopically level within the hydrodynamic barrier.
  • the pressure When the pressure is lowered the dissolved gas present in the water will appear as bubbles which increase in size.
  • Dependent on the viscoelasiticity of the water phase changes in bubble size creates micro-mechanical action both within as well as at the surface of the fabric/textile. This action promotes transport of water away from the textile.
  • the drying comprises at least one cycle of alternating pressure wherein the pressure in turns is reduced and increased or wherein the pressure is in ture increased and decreased.
  • One cycle of alternating pressure correspond to reduced pressure followed by increased pressure or by increased pressure followed by reduced pressure.
  • a time period wherein alternating pressure is performed may be indicated. During this time period one or more cycles of alternating pressures may take place.
  • the number of cycles of alternating pressure may vary and accordingly it may be 1 , 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1 , 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, or 30 cycles.
  • the number of cycles of alternating pressure may vary regularily with a frequency of e.g. 0.1 to 30 cycles prer minute, preferably 0.25 to 15 cycles per minute, more preferred 1 to 45 cycles per minute; such as 0.25, 0.5, 1 , 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1 , 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, or 30 cycles pr minut.
  • the time period of alternating pressure may vary and accordingly it may last 1 , 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1 , 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 , 22, 23, 24, 25, 26, 27, 28, 29, or 30 minutes. It is preferred that the drying process comprises more than one cycle of alternating pressure.
  • the invention relates to a method, wherein the alternating pressure is at least 0.1 bar; at least 0.2 bar; at least 0.3 bar, at least 0.4 bar, at least 0.5 bar, at least 0.6 bar, at least 0.7 bar, at least 0.8 bar, at least 0.9 bar, at least 1.0 bar, at least 1.1 bar, at least 1.2 bar, at least 1.3 bar, at least 1.4 bar, at least 1.5 bar, at least 2.0 bar, at least 2.5 bar, at least 3.0 bar, at least 3.5 bar, at least 4.0 bar, at least 4.5 bar, or at least 5.0 bar.
  • the temperature during drying according to the method is not critical as long as the temperature is sufficiently high to provide for a reasonable rate of evaporation of water and the temperature is sufficiently low to prevent damages of the fabrics/textile.
  • the temperature is in the range of 0-90°C, 5-50°C, 10-40°C, 15-30°C, 20-25°C.
  • the dryer will comprise a device for heating the air to the desired temperature.
  • the invention is not limited to any particular heating device, but any such device as known in the art may be applied to the present invention.
  • suitable heating devices can be mentioned the devises disclosed in EP 1 10881 1 , DE10164102D4, US 2009183386 and WO 2007131531.

Landscapes

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

Abstract

L'invention concerne un procédé de séchage d'un objet comprenant les étapes de : (a) placement de l'objet à sécher dans un récipient résistant à une pression alternative ; (b) application à l'objet d'un courant d'air de séchage relatif dans des conditions de pression alternative du récipient ; et (c) séchage de l'objet jusqu'à l'obtention d'une sécheresse souhaitée.
PCT/EP2013/068479 2012-09-07 2013-09-06 Procédé de séchage de textile à l'aide d'une pression alternative WO2014037509A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12183417.0 2012-09-07
EP12183417 2012-09-07

Publications (1)

Publication Number Publication Date
WO2014037509A1 true WO2014037509A1 (fr) 2014-03-13

Family

ID=46880975

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/068479 WO2014037509A1 (fr) 2012-09-07 2013-09-06 Procédé de séchage de textile à l'aide d'une pression alternative

Country Status (1)

Country Link
WO (1) WO2014037509A1 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB723135A (en) * 1951-03-09 1955-02-02 Clarice Bechhold Dodge Method and apparatus for washing and drying clothes
US2777313A (en) * 1951-03-09 1957-01-15 Clarice B Dodge Apparatus for washing and drying clothes
DE1432869A1 (de) * 1962-02-20 1969-07-24 Siemens Elektrogeraete Gmbh Mit einer Vakuumpumpe betriebener Waeschetrockner
EP1108811A1 (fr) 1999-12-14 2001-06-20 Whirlpool Corporation Echangeur de chaleur à sèche-linge avec condensation et dispositif de récupération des condensations
GB2358642A (en) * 1999-03-25 2001-08-01 John Herbert North Washing and drying machines and dry-cleaning machines
GB2366810A (en) * 2000-09-18 2002-03-20 John Herbert North Vacuum-assisted washer/dryer
US20020173109A1 (en) * 2000-06-08 2002-11-21 Matsushita Electric Industrial Co., Ltd. Method and system of drying materials and method of manufacturing circuit boards using the same
DE10164102A1 (de) 2001-07-20 2003-02-13 Winfried Hesse Anordnung zur Wärmespeicherung
WO2007093073A1 (fr) * 2006-02-17 2007-08-23 Awtec Ag Procede de sechage d'un produit textile
WO2007131531A1 (fr) 2006-05-17 2007-11-22 Miele & Cie. Kg Dispositif de chauffage, notamment dans un sèche-linge
WO2010055121A1 (fr) * 2008-11-17 2010-05-20 Novozymes A/S Procédé de nettoyage d’un objet
WO2012025378A2 (fr) * 2010-08-24 2012-03-01 Innostarter Ag Procédé de séchage d'un article textile

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB723135A (en) * 1951-03-09 1955-02-02 Clarice Bechhold Dodge Method and apparatus for washing and drying clothes
US2777313A (en) * 1951-03-09 1957-01-15 Clarice B Dodge Apparatus for washing and drying clothes
DE1432869A1 (de) * 1962-02-20 1969-07-24 Siemens Elektrogeraete Gmbh Mit einer Vakuumpumpe betriebener Waeschetrockner
GB2358642A (en) * 1999-03-25 2001-08-01 John Herbert North Washing and drying machines and dry-cleaning machines
EP1108811A1 (fr) 1999-12-14 2001-06-20 Whirlpool Corporation Echangeur de chaleur à sèche-linge avec condensation et dispositif de récupération des condensations
US20020173109A1 (en) * 2000-06-08 2002-11-21 Matsushita Electric Industrial Co., Ltd. Method and system of drying materials and method of manufacturing circuit boards using the same
GB2366810A (en) * 2000-09-18 2002-03-20 John Herbert North Vacuum-assisted washer/dryer
DE10164102A1 (de) 2001-07-20 2003-02-13 Winfried Hesse Anordnung zur Wärmespeicherung
WO2007093073A1 (fr) * 2006-02-17 2007-08-23 Awtec Ag Procede de sechage d'un produit textile
WO2007131531A1 (fr) 2006-05-17 2007-11-22 Miele & Cie. Kg Dispositif de chauffage, notamment dans un sèche-linge
US20090183386A1 (en) 2006-05-17 2009-07-23 Miele & Cie. Kg Gas-heated laundry dryer having a heating device
WO2010055121A1 (fr) * 2008-11-17 2010-05-20 Novozymes A/S Procédé de nettoyage d’un objet
WO2012025378A2 (fr) * 2010-08-24 2012-03-01 Innostarter Ag Procédé de séchage d'un article textile

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