EP2789723B1 - Procédé de traitement humide, de préférence de lavage, de linge - Google Patents

Procédé de traitement humide, de préférence de lavage, de linge Download PDF

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Publication number
EP2789723B1
EP2789723B1 EP14001190.9A EP14001190A EP2789723B1 EP 2789723 B1 EP2789723 B1 EP 2789723B1 EP 14001190 A EP14001190 A EP 14001190A EP 2789723 B1 EP2789723 B1 EP 2789723B1
Authority
EP
European Patent Office
Prior art keywords
liquid
laundry
neutralization
neutralizing agent
samples
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.)
Active
Application number
EP14001190.9A
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German (de)
English (en)
Other versions
EP2789723A1 (fr
Inventor
Wilhelm Bringewatt
Engelbert Heinz
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.)
Herbert Kannegiesser GmbH and Co
Original Assignee
Herbert Kannegiesser GmbH and Co
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.)
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Application filed by Herbert Kannegiesser GmbH and Co filed Critical Herbert Kannegiesser GmbH and Co
Publication of EP2789723A1 publication Critical patent/EP2789723A1/fr
Application granted granted Critical
Publication of EP2789723B1 publication Critical patent/EP2789723B1/fr
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    • 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
    • D06F31/00—Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies
    • D06F31/005—Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies consisting of one or more rotating drums through which the laundry passes in a continuous flow
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • 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
    • D06F2103/20—Washing liquid condition, e.g. turbidity
    • 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
    • D06F2105/42—Detergent or additive supply

Definitions

  • the invention relates to a method for wet treatment, preferably washing, of laundry according to the preamble of claim 1.
  • the wet treatment of laundry items is usually done by washing, rinsing and optionally at least one aftertreatment.
  • One type of post-treatment may be neutralization.
  • the neutralization of the washed laundry items is required if, for example, due to treatment additives used in the washing process, for example detergents, an acidic or basic pH value is established in the washing liquid.
  • treatment additives used in the washing process for example detergents
  • an acidic or basic pH value is established in the washing liquid.
  • the acidic or basic treatment liquid can not be completely removed. This is especially true for the bound in the laundry treatment liquid, the so-called bound liquor.
  • the procedure has hitherto been to use neutralizing agent in an estimated amount or on the basis of empirical values. That's how it is EP 0 287 761 It is known to measure the amount of the additive to be neutralized in the washing liquid and, if appropriate, to add neutralizing agent to the washing liquid.
  • the invention has for its object to provide a method for the wet treatment of laundry, which leads with the least possible amount of neutralizing agents to a complete or at least almost complete neutralization.
  • a serving to solve this problem method has the measures of claim 1. Accordingly, it is provided to remove at least one sample from the liquid supplied to the laundry after rinsing. The sample is filtered and only then the pH of the filtered sample is measured. If the measurement results in an acidic or basic pH, neutralizing agent is selectively added to the liquid. In this way, the pH of the liquid of the laundry can be selectively adjusted to a neutral pH after rinsing.
  • a regulation of the pH of the liquid can take place in such a way that a pH-neutral or substantially pH-neutral liquid results.
  • each sample is first filtered and then the pH of each sample is determined from the filtered sample. It can be determined by comparing several samples, the change in pH. In particular, it can thus be determined how the pH changes due to the added neutralizing agent.
  • the adjustment of the pH value or the neutralization of the liquid added to the laundry after rinsing can thus be set or adjusted iteratively, one after the other, in a stepwise manner. It is preferred that only small amounts of neutralizing agent are added to the liquid, until such time as a neutral pH indicative of complete or near complete neutralization is obtained from the subsequently measured samples. Overdoses of the neutralizing agent or even a change of the pH from an acidic pH to a basic or vice versa are thus effectively avoided.
  • An advantageous development of the method provides that the pH of at least two successive samples is not started until the targeted addition of at least one neutralizing agent is initiated.
  • the neutralization begins only when the rinsing process abducted, still bound in the washing rinse liquid has sufficiently mixed with the liquid supplied after rinsing the laundry, so that the sample taken from the liquid corresponds to the actual pH of the liquid with the rinsing liquid still bound in the items to be washed.
  • the measured pH value of the liquid with the bound rinsing liquid mixed therein from the laundry provides a reliable value for the subsequent neutralization. While the neutralization is taking place, further continuous sampling of the liquid will determine how much neutralization has progressed and the addition of further neutralizing agent will cease when a neutral pH has been measured.
  • the samples are filtered, preferably all of the samples of the liquid, before the pH measurements.
  • the filtration is preferably a fine filtration or microfiltration.
  • a very fine filtration can take place.
  • the sampling of the liquid added after rinsing the laundry takes place via a bypass.
  • a small amount of sample liquid, in particular a small measurement volume flow is withdrawn through the bypass.
  • the bypass allows continuous sampling.
  • either fresh water and / or recirculated water is used as the liquid added after rinsing the laundry.
  • the recirculated water is, for example, water which is produced during the dehydration of the laundry following neutralization, namely so-called press water or else drainage liquid.
  • Another preferred development of the method provides for the removal of samples and / or the metered addition of at least one neutralizing agent when the laundry is moving in the liquid.
  • the rinsing liquid bound in the laundry is thus rinsed out of the laundry by the liquid added after rinsing, in particular pH-neutral liquid, and mixed with the liquid added after rinsing.
  • dilution of the bound rinsing liquid takes place with the pH-neutral liquid having a much larger volume.
  • the added pH-neutral liquid mixed with the still acidic or basic bound rinse liquid can then be effectively neutralized.
  • the method it is provided to remove the samples from the chamber of the continuous washing machine in which the neutralization of the laundry is also carried out, preferably a stationary outside drum assigned to this chamber.
  • This is preferably done by a bypass line.
  • the bypass line allows a continuous removal of a measuring volume flow, namely a relatively small amount of sample liquid.
  • the at least one chamber for performing the neutralization of the laundry as well as the other chambers for washing and rinsing the laundry rotates.
  • This also contributes to an effective neutralization, wherein the samples taken have a representative pH due to the intensive mixing of the added after rinsing the laundry pH-neutral liquid with the rinsed from the washing from the rinse, bound rinse liquid.
  • the invention is explained below in connection with the wet treatment of laundry in commercial laundries by means of a continuous washing machine 10.
  • washing, rinsing and aftertreatment, in particular neutralization, of the laundry take place.
  • the laundry can be any laundry, specifically flat linen, clothing, in particular workwear, but also mats and the like.
  • the in the Fig. 1 schematically illustrated continuous washing machine 10 has a about a preferably horizontal axis of rotation rotating or pivoting (reciprocating) drivable drum 11.
  • the laundry to be washed is transported in pieces in the direction of passage 12 through the rotating or pivoting cylindrical drum 11, based on the Presentation in the Fig. 1 from left to right right.
  • a plurality of successive chambers 14 are formed by transverse partitions 13 in the direction of passage 12.
  • the chambers 14 may be the same size, but also different sizes.
  • the in the Fig. 1 shown continuous washing machine 10 has thirteen consecutive chambers 14. However, the invention is not limited thereto.
  • the invention is also suitable for continuous washing machines 10 having a larger or smaller number of successive chambers 14.
  • the continuous washing machine 10 shown has three treatment zones successive in the direction of passage 12, namely a prewash zone 15, a final wash zone 16 and a rinse zone 17.
  • a neutralization zone is integrated into the rinse zone 17.
  • the neutralization zone is formed by a single chamber 14 of the continuous washing machine 10, namely a neutralization chamber 18.
  • the neutralization chamber 18 is the last chamber 14 of the rinsing zone 17 seen in the passage direction 12 and also the last chamber 14 at the same time the continuous washing machine 10.
  • the rotationally drivable drum 11 of the continuous washing machine 10 are associated with a plurality of stationary and liquid-impermeable outer drums 19 to 23.
  • a first outer drum 19 seen in the direction of passage 12 is located at the end of the prewash zone 15.
  • a second outer drum 20 is arranged at the beginning of the final wash zone 16.
  • the final wash zone 16 has a third outer drum 21 at the end.
  • a fourth outer drum 22 is located at the beginning of the rinse zone 17 and a fifth (last) outer drum 23 at the end of the rinse zone 17.
  • This outer drum 23 is associated with the neutralization chamber 18 at the end of the continuous washing machine 10.
  • a loading chute 24 In front of the drum 11 is a loading chute 24, whereby a loading of the continuous washing machine 10 is carried out by the dirty laundry passes through the loading chute 24 in the first chamber 14 of the prewashing zone 15.
  • a discharge chute 25 At the end of the continuous washing machine 10 is a discharge chute 25.
  • About the discharge chute 25 leaves the washed, rinsed and neutralized laundry the neutralization chamber 18 of the continuous washing machine 10.
  • a dewatering device such as a dewatering press or a Zetrifuge be supplied.
  • a bypass line 26 goes out. This is a sampling line, which preferably a small amount or a small volume flow of the liquid (sample liquid) of the neutralization chamber 18 can be removed.
  • a pump 28 is located in the bypass line 26.
  • a filter 29 follows the pump 28.
  • the filter 29 is preferably a fine filter for fine filtration or a microfilter for microfiltration the sample liquid. It can also be a fine filter.
  • the filter 29 is associated with a discharge line 30 for filtered out of the sample liquid substances or particles.
  • a pH-measuring device 31 In the flow direction 27 of the sample liquid is followed by the filter 29, a pH-measuring device 31.
  • the bypass line 26 is returned by the pH value measuring device 31 to the outer drum 23 of the neutralization chamber 18.
  • a branch 32 is provided to a drain line 33.
  • the drain line 33 may, for example, lead to an outflow.
  • the neutralization chamber 18 is associated with a supply for at least one neutralizing agent.
  • a metering device is provided for the at least one neutralizing agent.
  • the metering device can be integrated into the pH-value measuring device 31, specifically a controller for the amount of the neutralizing agent to be metered.
  • a liquid neutralizing agent or a neutralizing agent dissolved in a liquid is preferably used. This can be supplied together with the at least one neutralizing agent and the measured sample liquid via the bypass line 26 of the neutralization chamber 18 of the continuous washing machine 10.
  • neutralizing agent of the neutralization chamber 18 is supplied, then there is also the metering device.
  • the controller can then be assigned to the metering device or integrated into it.
  • the controller for the amount of However, neutralizing agent to be added can also be located elsewhere, for example, associated with the pH-value measuring device 31 or integrated into it.
  • the respective laundry item is transferred from the second (middle) chamber 14 of the rinsing zone 17 with the free and in the laundry bound rinsing liquid in the neutralization chamber 18.
  • the free rinsing liquid is then discharged from the outer drum 23 of the neutralization chamber 18, so that the rinsing liquid (bound liquor) bound in the laundry remains only in the laundry item.
  • the neutralization chamber 18 is filled with preferably pH-neutral liquid. This may be fresh water or else recirculated water or other recirculated pH-neutral liquid, for example dehydration liquid which has been separated from the laundry during the dewatering following the neutralization and has been temporarily stored in a memory, not shown.
  • the pre-washing, clear washing and rinsing other laundry items is carried out during the rotating or pivoting drive of the drum 11, the laundry of the pH-neutral liquid in the neutralization chamber 18 rinses and thereby bound in the wash rinse the laundry with the supplied pH neutral liquid, the neutralizing liquid, by the movement of the laundry in the same mixed.
  • a small partial flow of the liquid as sample liquid is withdrawn from the neutralization chamber 18 via the bypass line 26 in the flow direction 27. This is preferably carried out continuously so that sample liquid can be continuously withdrawn from the neutralization chamber 18 via the bypass line 26 during the movement of the wash of the liquid in the neutralization chamber 18.
  • the pH value changing in the sample liquid is continuously measured by the supply of small amounts of neutralizing agent.
  • the addition of small amounts of neutralizing agent is continued until the measurement shows that the sample liquid has a neutral or nearly neutral pH, that is, the neutralization of the liquid in the neutralization chamber 18 is completed.
  • the sample liquid is pumped by the pump 28 continuously in the flow direction 27 through the bypass line 26.
  • the sample liquid flows through the filter 29, preferably fine or ultra-fine filter.
  • the sample liquid is filtered.
  • This is preferably a fine filtration, a microfiltration or microfiltration.
  • the sample liquid filtered by the filter 29 subsequently flows in the flow direction 27 through the pH-value measuring device 31.
  • successive samples of the sample liquid are measured with regard to the pH. This measurement takes place in successive time intervals, preferably in short successive time intervals. The time intervals may be the same, but may become longer as the neutralization progresses.
  • the sample liquid leaving the pH value measuring device 31 in the flow direction 27 can optionally be led to a drain via the drain line 33 or can also be returned to the neutralization chamber 18 via the bypass line 26.
  • the metered addition of the at least one liquid or liquefied neutralizing agent can take place in the region of the pH-value measuring device 31.
  • at least one neutralizing agent can be fed directly to the neutralization chamber 18 at any other suitable location.
  • the addition of the at least one neutralizing agent to the sample liquid returned to the neutralization chamber 18 or the direct addition of the at least one neutralizing agent to the liquid in the neutralization chamber 18 takes place by means of a metering device (not shown).
  • the metering device is controlled or regulated by a corresponding actuating means, depending on the pH value which the pH value measuring device 31 has determined.
  • the metering device or the pH value measuring device 31 is assigned a control or regulation, in particular in the form of a computer.
  • the method according to the invention can be used not only in connection with the continuous washing machine 10 shown in the figures, but also with any continuous washing machine of any structure, in particular any number of chambers 14.
  • the method according to the invention can also be used with other washing machines for commercial laundries, for example washing machines. Throwers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (10)

  1. Procédé de traitement de linge, de préférence de lavage, le linge étant d'abord lavé et ensuite rincé, une neutralisation du linge ayant lieu après le rinçage en apportant si nécessaire un agent de neutralisation au liquide dans lequel se trouve le linge et/ou imprégnant le linge,
    caractérisé en ce que
    au moins un échantillon de liquide est prélevé,
    en ce que l'échantillon est filtré et au moins une valeur du pH de l'échantillon filtré est mesurée et le cas échéant, un agent de neutralisation est ajouté de manière contrôlée au liquide sur la base de la valeur du pH obtenue lors de la mesure.
  2. Procédé selon la revendication 1, caractérisé en ce que des échantillons répétés de liquide sont prélevés, les échantillons sont tous filtrés et la valeur du pH de chaque échantillon filtré est mesurée.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que lorsque la valeur du pH d'au moins deux échantillons successifs ne varie pas ou pas de manière significative, l'addition contrôlée d'au moins un agent de neutralisation est lancée.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le prélèvement d'échantillons s'effectue de préférence en continu à l'aide d'un conduit de dérivation (26), en particulier après l'addition d'au moins un agent de neutralisation au liquide dans lequel se trouve le linge, en ce que des échantillons répétés de liquide auquel l'agent de neutralisation a été ajouté sont prélevés et filtrés, en ce que la valeur de leur pH est mesurée et si nécessaire, un agent de neutralisation est ajouté jusqu'à ce qu'une valeur neutre du pH ait été mesurée.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'après le rinçage du linge, un liquide de pH neutre est ajouté, en particulier de l'eau fraiche et/ou de l'eau recyclée, de préférence du liquide d'essorage produit lors de l'essorage qui suit la neutralisation.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le prélèvement d'échantillons et/ou l'addition d'agent de neutralisation sont réalisés pendant que le linge se déplace dans le liquide.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que la filtration réalisée sur les échantillons est une filtration fine, une microfiltration ou une filtration extrêmement fine.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que le linge est lavé, rincé et neutralisé dans un lave-linge (10) fonctionnant en continu et présentant un tambour (11) doté de chambres (14, 18) successives et tournant ou tournant en va-et-vient, en ce que la neutralisation est réalisée après le rinçage, de préférence au niveau d'une zone de rinçage (17) ou à la suite de la zone de rinçage (17), de préférence au niveau d'une dernière chambre du lave-linge (10) fonctionnant en continu configurée comme chambre de neutralisation (18) et/ou au niveau de la dernière chambre de la zone de rinçage (17).
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que les échantillons sont prélevés, de préférence à l'aide d'un conduit de dérivation (26), dans la chambre du lave-linge (10) fonctionnant en continu dans laquelle a lieu la neutralisation du linge, en particulier dans la chambre de neutralisation (18) et de préférence dans un tambour extérieur (23) à l'arrêt de cette dernière.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que pendant la neutralisation, le linge est déplacé dans le liquide par un entraînement en rotation du tambour (11) du lave-linge (10) fonctionnant en continu qui présente les chambres (14, 18).
EP14001190.9A 2013-04-11 2014-03-31 Procédé de traitement humide, de préférence de lavage, de linge Active EP2789723B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013006200.4A DE102013006200A1 (de) 2013-04-11 2013-04-11 Verfahren zum Nassbehandeln, vorzugsweise Waschen, von Wäschestücken

Publications (2)

Publication Number Publication Date
EP2789723A1 EP2789723A1 (fr) 2014-10-15
EP2789723B1 true EP2789723B1 (fr) 2017-10-25

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Country Status (5)

Country Link
US (1) US10619283B2 (fr)
EP (1) EP2789723B1 (fr)
DE (1) DE102013006200A1 (fr)
DK (1) DK2789723T3 (fr)
ES (1) ES2655216T3 (fr)

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DE102013006200A1 (de) * 2013-04-11 2014-10-16 Herbert Kannegiesser Gmbh Verfahren zum Nassbehandeln, vorzugsweise Waschen, von Wäschestücken
US20200123700A1 (en) * 2017-03-01 2020-04-23 Applied Silver, Inc. Systems and processes for treating textiles with an antimicrobial agent
JP2021534911A (ja) * 2018-08-27 2021-12-16 エコラボ ユーエスエー インコーポレイティド 微粒子含有液体サンプルを濾過することなく抽出するためのシステムおよび技術
DE102019118348A1 (de) * 2019-07-08 2021-01-14 KYOCERA Fineceramics Solutions GmbH Neutralisationsanlage
CN112323342A (zh) * 2020-06-05 2021-02-05 广东天美洗涤有限公司 一种洗衣龙
CN114318762B (zh) * 2022-01-14 2022-12-27 江苏川岛洗涤机械科技有限公司 一种隧道式洗衣机节水洗涤工艺

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Also Published As

Publication number Publication date
US20140304925A1 (en) 2014-10-16
ES2655216T3 (es) 2018-02-19
DE102013006200A1 (de) 2014-10-16
EP2789723A1 (fr) 2014-10-15
US10619283B2 (en) 2020-04-14
DK2789723T3 (da) 2018-01-29

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