EP1983087B1 - Method for wet treating articles of laundry - Google Patents

Method for wet treating articles of laundry Download PDF

Info

Publication number
EP1983087B1
EP1983087B1 EP08007286.1A EP08007286A EP1983087B1 EP 1983087 B1 EP1983087 B1 EP 1983087B1 EP 08007286 A EP08007286 A EP 08007286A EP 1983087 B1 EP1983087 B1 EP 1983087B1
Authority
EP
European Patent Office
Prior art keywords
treatment liquid
washing
active substances
wash
spent
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
EP08007286.1A
Other languages
German (de)
French (fr)
Other versions
EP1983087A3 (en
EP1983087A2 (en
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.)
Filing date
Publication date
Application filed by Herbert Kannegiesser GmbH and Co filed Critical Herbert Kannegiesser GmbH and Co
Priority to PL08007286T priority Critical patent/PL1983087T3/en
Priority to EP10007887A priority patent/EP2246468A1/en
Publication of EP1983087A2 publication Critical patent/EP1983087A2/en
Publication of EP1983087A3 publication Critical patent/EP1983087A3/en
Application granted granted Critical
Publication of EP1983087B1 publication Critical patent/EP1983087B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F31/00Washing installations comprising an assembly of several washing machines or washing units, e.g. continuous flow assemblies
    • D06F31/005Washing 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
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00Control of operations performed in washing machines or washer-dryers 
    • D06F33/30Control of washing machines characterised by the purpose or target of the control 
    • D06F33/46Control of the energy or water consumption
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14Arrangements for detecting or measuring specific parameters
    • D06F34/22Condition of the washing liquid, e.g. turbidity
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/20Washing liquid condition, e.g. turbidity
    • D06F2103/22Content of detergent or additives
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02Water supply
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/06Recirculation of washing liquids, e.g. by pumps or diverting valves
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/52Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps

Definitions

  • the invention relates to methods for the wet treatment of laundry according to the preamble of claim 1.
  • treating liquid containing washing-active substances.
  • the treatment liquid which is not bound in the laundry, the so-called free liquor, separated from the laundry.
  • the treatment liquid then contains spent washing-active substances which have absorbed the dirt from the laundry items, but also unused washing-active substances.
  • a process for the treatment of wastewater from, for example, a textile laundry is known.
  • used treatment liquid is filtered to separate spent washing-active substances from unused washing-active substances.
  • the unused washing-active substances having Treatment liquid is returned to the washing process after previously adding fresh detergent.
  • a targeted dosing of detergents is not provided, so that it can lead to an uneconomical overdose.
  • the present invention seeks to provide a method for wet treatment of laundry, which has a greater economy compared to known methods.
  • a method for achieving this object comprises the measures of claim 1. Accordingly, spent washing-active substances are removed from the treatment liquid separated from the laundry. The spent washing-active substances bind the dirt that the treatment liquid has taken from the previous washing process. By removing the used washing-active substances, the dirt is thus at least for the most part removed from the treatment liquid. The treatment liquid with the remaining unused washing-active substances can then be reused for a subsequent washing process. As a result, unused washing-active substances are not lost and they also need not be neutralized for draining the treatment liquid into the sewage network. Above all, due to the method according to the invention, the fresh water consumption can be reduced, because the treatment liquid with the unused washing-active substances can be used again for washing the laundry items.
  • the treatment liquids that are at least largely freed of spent detergent substances will be supplied to the laundry items as needed before the pre-wash and / or before the final wash.
  • the higher-temperature treatment liquid from the previous clear-wash may be recycled after separating spent wash-active substances, while the treatment liquid from the pre-wash is returned to the pre-wash.
  • the respective treatment liquids no significant energy needs to be supplied in order to use them again.
  • the colder treatment liquid from the pre-wash need not be heated to be supplied to the clear wash.
  • At least one return line of treatment liquid from the drum which is returned to the beginning of the drum, is assigned a filter for removing spent washing-active substances from the treatment liquid. It can thus be the entire treatment liquid, which is obtained during the washing of the laundry items, freed of washed laundry substances before rinsing the laundry items.
  • treatment liquid is applied after prewashing and clear washing. The spent washing-active substances are then removed from these separately obtained treatment liquids before the treatment liquid is used again for washing.
  • laundry-active substances are consumed from the treatment liquid separated from the laundry after washing and also from the dehydrator before rinsing in the dehydrator Remove separated treatment liquid.
  • This two-stage removal of the spent wash-active substances from the treatment liquid optimally provides spent washing-active substances with essentially only existing unused washing-active substances therein for a subsequent washing operation, in particular for a washing operation with a separate pre-wash and clear wash , The fresh water requirement is thereby only a fraction of the treatment liquid required for the subsequent washing process, wherein, if necessary, only the actually used washing-active substances are to be replaced.
  • the spent wash-active substances are separated from the treatment liquid by filtration, preferably precision filtration. Since spent washing-active substances have a particle size that exceeds the particle size of unused washing-active substances due to the dirt pick-up, a separation between the unused and used washing-active substances can be carried out by filtration. Because the particle sizes differ only slightly, above all only in the micrometer range, precision filtration is particularly suitable for effectively removing at least a majority of the spent washing-active substances from the treatment liquid.
  • An advantageous development of the method provides for a prefiltration to be carried out before filtering out used washing-active substances from the treatment liquid.
  • This prefiltration eliminates large particles of dirt which, when subsequently filtering out used washing-active substances, in particular by means of precision filtration, can no longer have a disturbing effect by loading or even adding to the sensitive filters for precision filtration.
  • a particularly effective and reliable filtration of at least a majority of the smaller spent washing-active substances is possible.
  • the removal of spent washing-active substances from the treatment liquid is expediently carried out by micro- and / or ultrafiltration.
  • specifically used wash-active substances can be removed from the treatment liquid.
  • These are preferably particles with a size between 10 .mu.m and 0.005 .mu.m, preferably 1 .mu.m to 0.5 .mu.m. This is the typical particle size of spent washing-active substances, so that in this way at least a large part of the used washing-active substances is removed, but not the smaller unused washing-active substances.
  • the measurement of unused washing-active substances can be carried out by a so-called bubble tensiometer, for example a H 2 O 2 sensor or a CI_ sensor.
  • a so-called bubble tensiometer for example a H 2 O 2 sensor or a CI_ sensor.
  • Other measuring methods or sensors suitable for the particle size of unused washing-active substances are also possible.
  • the replenishment of fresh washing-active substances is done to such an extent that the treatment liquid again has a content of unused washing-active substances, which corresponds to the nominal content of unused washing-active substances in the treatment liquid or slightly above, preferably in a deliberately selected excess spectrum.
  • the devices shown here form a washing line for the wet treatment of laundry items.
  • the wet treatment is washing, rinsing and dewatering.
  • garments are all commonly used to washing textile articles into consideration, in particular clothing, including workwear, table linen, bed linen, floor mats, entrance mats and the like.
  • the devices shown in the figures comprise a continuous washing machine and a drainage device.
  • the dewatering device may be a centrifuge or a dewatering press shown in the figures.
  • the continuous washing machine 10 of the Fig. 1 has a about a preferably horizontal axis of rotation 12 rotatably drivable, cylindrical drum 13.
  • the drum 13 are formed by transverse partitions 14 more in the direction of passage 15 of the laundry items not shown by the drum 13 consecutive chambers 16.
  • the continuous washing machine 10 of the embodiment of Fig. 1 are essentially three treatment zones, namely a prewash zone 17, a subsequent final wash zone 18 and finally a rinse zone 19 arranged at the end of the drum 13.
  • Both the pre-wash zone 17 and the final wash zone 18 have two successive chambers 16.
  • the rinse zone 19 only a single chamber 16.
  • the continuous washing machine 10 has five chambers 16.
  • the invention is, however, not limited thereto. Rather, the number of chambers 16 may differ from the embodiment shown. Above all, the prewash zone 17, the final wash zone 18 and the rinse zone 19 can have a larger or smaller number of chambers than in the Fig. 1 have shown.
  • the continuous washing machine 10 is the dewatering press 16, seen in the direction of passage 15, downstream.
  • the washed and rinsed laundry items reach the dewatering press 11 from the continuous washing machine 10 via an unloading chute 20 arranged at the end thereof.
  • the dewatering press 11 is designed in a manner known in principle.
  • the dewatering press 11 has a top and bottom open press housing, preferably a cylindrical press cage 21 with a liquid-impermeable, cylindrical lateral surface and a press ram 22 which can be moved up and down in the press basket 21 and which is in the Fig. 1 only hinted (dashed) is shown.
  • the press ram 22 can be raised so far by a hydraulic cylinder that it is located above the press basket 21, in particular for loading the dewatering press 11, thereby completely releasing an upper opening of the press basket 21.
  • the press ram 22 can be pressed into the press basket 21, wherein the press ram 22 is sealed in a substantially liquid-tight manner inside the jacket surface of the press basket 21.
  • a collection tank 23 or other means for collecting the pressed out of the laundry treatment liquid is a collection tank 23 or other means for collecting the pressed out of the laundry treatment liquid.
  • a drain line 24 branches off.
  • the drain line 24 leads to a prefilter 25 and from there to a filter 26 for separating spent washing-active substances from the discharged through the drain line 24 from the prewashing zone 17 treatment liquid.
  • the drain line 24 opens into a branch point 27. From the branch point 27 performs a return line 28 to the beginning of the continuous washing machine 10, namely in the embodiment shown to an inlet funnel 29, with which the laundry items to be washed drum 13 can be fed.
  • a further drain line 30 is arranged, which in turn leads to a prefilter 31 and then to a filter 32 for separating spent wash-active substances from the treatment liquid.
  • the drain line 30 continues to a branch 33.
  • the branch point 27 can be fed from a branch line 34, from where the from the final wash zone 18th incoming, filtered treatment liquid via the return line 28 to the inlet funnel 29 in front of the drum 13 of the continuous washing machine 10 can be fed.
  • a second line namely a return line 35
  • This return line 35 leads via a further branch point 36 to the return line 37, from which the filtered treatment liquid without spent washing-active substances, but still with a residue of unused washing-active substances to the beginning of the final wash zone 18 is traceable.
  • the rinse zone 19 has an overflow 38 which leads to a collection tank 39. From the collection tank 39 branches off an intermediate line 40, which leads to the branch point 36 in the return line 37.
  • the return line 41 leads to the branching point 33, from where the treatment liquid from the collecting tank 23 can be fed to the inlet funnel 29 in front of the drum 13.
  • the return line 42 from the collection tank 23 is returned to the rinsing zone 19, so the last chamber 16 of the continuous washing machine 10th
  • the filters 26 and 32 are formed. These may be the same filters which allow a precision filtration of the treatment liquid originating from the prewash zone 17 or the final wash zone 18.
  • This treatment liquid is washing water enriched with washing-active substances, some of which have been consumed by dirt absorption, while a part of excess washing-active substances is still unused even after pre-washing or clear-washing.
  • the filters 26 and 32 separate only used washing-active substances from the treatment liquid, but no smaller particle size unused washing-active substances.
  • the filters 26 and 32 are designed as micro and / or ultrafilters which are suitable for filtering out particles of the size of the spent washing-active substances from the liquid.
  • Such filters 26 and 32 make it possible to filter out of the treatment liquid particles having a size of 0.005 .mu.m to 10 .mu.m, preferably 0.5 .mu.m to 1 .mu.m.
  • the filters 26 and 32 are preferably membrane filters. But there are also other filters into consideration, which are suitable to perform a precision filtration, especially a micro- and / or ultrafiltration, in particular to filter out particles of the aforementioned size ranges from the treatment liquid.
  • the membrane filters are preferably designed as a wound filter and / or provided with support bodies.
  • the support bodies are primarily ceramic support bodies.
  • the filters 26 and 32 can work on the cross-flow principle, but also on the dead-end principle.
  • the items to be washed pass through the inlet funnel 29 into the inlet end of the drum 13 of the continuous washing machine 10.
  • the items of laundry are flooded with filtered treatment liquid from both the pre-wash zone 17, the final wash zone 18 and the dewatering press 11.
  • the treatment liquid is usually water, which has a certain content of washing-active substances, as a rule detergents, surfactants and the like.
  • the particular incurred during washing the laundry debris is bound by the washing-active substances, whereby they increase in size.
  • Such detergent substances are consumed by the dirt binding.
  • the water contains excess washing-active substances to form the treatment liquid, so that after washing the laundry in the treatment liquid, not only spent washing-active substances which have bound dirt are contained, but also unused washing-active substances.
  • the treatment liquid is prefiltered via the drain line 24 initially at the pre-filter 25 at the end of the pre-wash zone 17.
  • particles are removed from the treatment liquid, which are larger than the particles of spent and unused washing-active substances.
  • the treatment liquid in the filter 26 is at least largely freed from spent wash-active substances enriched with dirt from the prewash zone 17. Only used washing-active substances in the filter 26 are separated from the treatment liquid, but no unused washing-active substances. Because the unused washing-active substances have not absorbed any dirt and are therefore smaller than the used washing-active substances, the filter 26 leaves the still unused washing-active substances in the treatment liquid.
  • the larger particles filtered off from the pre-filter 25 and the spent washing-active substances separated from the filter 26 by the treatment liquid are removed at the pre-filter 25 and at the filter 26.
  • the filter 26 leaves only or substantially only unused washing-active substances containing treatment liquid. This is supplied via the branching point 27 and the return line 28 to the inlet funnel 29 in front of the continuous washing machine 10 for the purpose of washing laundry items which are to be washed by the continuous washing machine 10 in the next washing cycle.
  • the treatment liquid is separated from the washed laundry.
  • This treatment liquid passes via the drain line 30 to the pre-filter 31 and then to the filter 32.
  • the filter 32 At the pre-filter 31 as the pre-filter 25 larger particles are filtered out as spent washing-active substances, while the filter 32, in turn, like the filter 26 separates spent washing-active substances from the treatment liquid.
  • This treatment 32 leaving treatment liquid with essentially only fresh laundry substances passes as needed either via the branch point 33, the connecting line 34 and the return line 28 to the inlet funnel 29 in front of the drum 13 or via the return line 35, the branch point 36 and the return line 37th to the beginning of the final wash zone 18.
  • a corresponding valve not shown, and a control associated therewith, essentially only unused washing-active substances-containing treatment liquid is directed to the inlet funnel 29 or to the beginning of the final wash zone 18.
  • the rinse water can be passed through the return line 37 to the beginning of the final wash zone 18 if necessary via the intermediate line 40 and the branching point 36.
  • rinsing liquid pressed out by the dewatering press 11 passes either via the return line 41 to the branching point 33 and from there via the connecting line 34, the branching point 27 and the return line 28 to the inlet funnel 29 in front of the drum 13 or via the return line 42 Rinsing zone 19.
  • the rinsing water from the collecting tank 23 under the dewatering press 11 can be directed either to the inlet hopper 29 or to the rinsing zone 19 as needed by corresponding valves, not shown.
  • the process described makes it possible to recirculate freed treatment liquid from the prewash zone 17 and the final wash zone 18 from spent wash-active substances, in particular spent surfactants, to the inlet funnel 29 in front of the continuous washing machine 10, so that this treatment liquid freed of spent washing-active substances can be used again for washing a washing liquid subsequent item of laundry items.
  • unused wash-active substances in the filtered treatment liquid are preferably continuously measured during operation of the device, for example by means of a bubble tensiometer, a H 2 O 2 sensor, a CI_ sensor or the like.
  • the measured concentration of unused washing-active substances is then compared with a Target concentration of washing-active substances in the treatment liquid. If it is found in this comparison that the concentration of the remaining washing-active substances still present in the treatment liquid is below the desired concentration, fresh detergent-active substances are admixed to the treatment liquid, preferably in the area of the return line 28. This admixing of new washing-active substances takes place to such an extent in that the desired concentration of washing-active substances in the recycled treatment liquid is restored or is preferably exceeded within a defined range.
  • unused washing-active substances are not lost in the treatment liquid; they can be consumed almost completely.
  • no treatment liquid with unused washing-active substances is conducted into the drain.
  • residual wash-active substances in the treatment liquid need not be neutralized before being discharged into the drain.
  • the reuse of the still remaining unused washing-active substances containing treatment liquid of the fresh water requirement can be significantly reduced. As a result of the reduction of the fresh water requirement thus made possible by the methods according to the invention and the complete utilization of all fresh washing-active substances, the economy of the washing process is significantly increased.
  • the Fig. 2 shows a device according to a second embodiment of the invention.
  • This apparatus also has a continuous washing machine 45 and a dewatering press 46 or other dewatering device, such as a spin dryer.
  • the continuous washing machine 45 is designed in principle like the continuous washing machine 10. Therefore, the same reference numerals are used for the same parts.
  • the continuous washing machine 45 has in the illustrated embodiment, five in the direction of passage 15 consecutive chambers 16. However, the five chambers 16 in the continuous washing machine 45 only one prewash zone 47 of two chambers 16 and a clear wash zone 48 of three chambers 16. The number of chambers of prewash 47 and the clear-wash zone 48 may, however, deviate from the embodiment shown, namely be both larger and smaller. As a rule, however, the clear-wash zone 48 has a larger number of chambers than the pre-wash zone 47.
  • the continuous washing machine 45 has no rinsing zone.
  • the rinsing therefore does not take place in the continuous washing machine 45.
  • the rinsing in the dewatering device ie in the embodiment shown in the dewatering press 46.
  • This thus has two functions, namely serves to separate a major part of the treatment liquid (clear wash) from the final wash 48 of the continuous washing machine 45 and the subsequent Rinsing the laundry, including the dewatering press 46 via an only hinted in the Fig. 2 shown supply line 49 fresh water can be supplied.
  • the continuous washing machine 45 has, at the end of the prewashing zone 47, a discharge line 50 which leads to a prefilter 51 and from this to a filter 52, which in particular serves for precision filtration.
  • the pre-filter 51 and the filter 52 are formed like the pre-filters 25 and 31 and filters 26 and 32 of the first embodiment and have the same purpose. From the filter 52, the treatment liquid coming from the prewashing zone 17 and freed of spent washing-active substances passes via a branching point 53 to the return line 54, which leads to the inlet funnel 29 in front of the continuous washing machine 45.
  • a discharge line 55 extends to a prefilter 56 and a subsequent filter 57.
  • the prefilter 56 and the filter 57 are formed like the prefilter 51 and the filter 52, namely serve to first coarser particles from the treatment liquid and then remove used washing-active substances.
  • the spent washing active substances at least largely freed from spent washing liquid via a connecting line 58 and a branch point 59 to the branch point 53 and from there via the return line 54 to the inlet hopper 29 of the continuous washing machine 45 reach.
  • From the filter 57 further goes out a drain line 60, which is returned to the beginning of the prewashing zone 17.
  • the prepared from the pre-filter 51 and the filter 52 liquid from the end of the prewashing zone 17 passes through the return line 54 to the inlet hopper 29 before the continuous washing machine 45. This substantially only unused washing-active substances containing treatment liquid is used to leach laundry, in a next Wash cycle to be treated.
  • the washed laundry items reach the dewatering press 46 behind the continuous washing machine 45 or another dewatering device.
  • the treatment liquid from the final wash zone 48 is first separated from the laundry items to the residual moisture.
  • the treatment liquid from the final wash zone 48 which contains used and unconsumed wash-active substances, is collected in the collection tank 23 under the dewatering press 46 and passed from the latter through the discharge line 55 first to the pre-filter 56, prefiltered by this by separating larger particles and then fed to the filter 57 which at least for the most part removes used washing-active substances from the treatment liquid.
  • the treated treatment liquid originating from the prewash zone 47 is filled up by such a proportion, which has been removed from the prewash zone 47 during the prefiltration in the prefilter 51 and in the filter 52 from the treatment liquid.
  • the remaining part of the treatment liquid separated from the laundry items by the dewatering press 46 from the final wash zone 48 in the collection tank 23 is passed behind the filter 57 through the drain line 60 to the beginning of the final wash zone 48.
  • the laundry is rinsed in the dewatering press 46.
  • fresh water is supplied to the dewatering press 46 via the supply line 49, which is pressed by the dewatering press through the laundry items, wherein a rinsing of the laundry takes place.
  • the rinsing liquid pressed out of the laundry items during rinsing is now collected in the collecting tank 23 and conducted via the connecting line 61 without filtration via the branching points 53 and 59 through the return line 54 to the inlet funnel 29 in front of the continuous washing machine 45.
  • At least one further collection tank may be arranged in the discharge line 55, in which treatment liquid from the final wash zone 48 is temporarily stored until it is filtered by the prefilter 56 and the filter 57 and sent for further use.
  • the collection tank 23 can be emptied of the laundry items immediately after the separation of the treatment liquid from the final wash zone 48, so that the collection tank 23 is available for receiving rinsing liquid at short notice.
  • the inventive method is particularly suitable for the device of Fig. 2 in that the continuous washing machine 45 has only one pre-wash zone 47 and one final wash zone 48, but the washing of the laundry items takes place in the dewatering press 46.
  • treatment liquid from the final wash zone 48 and rinse liquid from the dewatering press 46 falls in rapid succession, so that treated treatment liquid containing only unused washing-active substances via the rinse liquid is available at the appropriate time for a washing operation of a following item of laundry items.
  • the fresh water requirement in the device of Fig. 2 reduced to a minimum.
  • no fresh water can be supplied at all, because the liquid discharged from the residual moisture with the completely rinsed and dehydrated items of laundry and at the pre-filters 51 and 56 as well as the filters 52 and 57 with residual material particles and spent washing-active substances separated liquid by the flushing of the laundry items of the dewatering press 46 via the supply line 49 supplied fresh water is used to replenish the discharged or filtered treatment liquid for the treatment of the subsequent item of laundry in the device.
  • the method of measuring the concentration of unused washing-active substances in the treatment liquid during the washing process is used in the same way as in connection with the device of Fig. 1 has been described, after separating the spent washing-active substances from the treatment liquid continuously (in situ) determine the concentration of the spent washing-active substances in the treatment liquid behind the filters 52 and / or 57 and regulated in dependence on a desired concentration of the washing-active substances a corresponding amount Add new washing-active substances to the treatment liquid.
  • the measurement of the concentration of unused laundry-active substances in the washing liquid is carried out by measuring sensors or measuring probes, which are described above in connection with the exemplary embodiment of FIG Fig. 1 have been called.

Landscapes

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

Description

Die Erfindung betrifft Verfahren zur Nassbehandlung von Wäschestücken gemäß dem Oberbegriff des Anspruchs 1.The invention relates to methods for the wet treatment of laundry according to the preamble of claim 1.

Bei der Nassbehandlung, insbesondere beim Waschen, von Wäschestücken, wobei es sich um alle Arten von zu waschenden Gegenständen handeln kann, wird waschaktive Substanzen enthaltende Behandlungsflüssigkeit verwendet. Nach dem Waschen wird die Behandlungsflüssigkeit, die in den Wäschestücken nicht gebunden ist, die sogenannte freie Flotte, von den Wäschestücken getrennt. Die Behandlungsflüssigkeit enthält dann verbrauchte waschaktive Substanzen, die den Schmutz aus den Wäschestücken aufgenommen haben, aber auch noch unverbrauchte waschaktive Substanzen.In the wet treatment, particularly in the washing of laundry items, which may be any type of items to be washed, use is made of treating liquid containing washing-active substances. After washing, the treatment liquid, which is not bound in the laundry, the so-called free liquor, separated from the laundry. The treatment liquid then contains spent washing-active substances which have absorbed the dirt from the laundry items, but also unused washing-active substances.

Bisher ist es üblich und beispielsweise aus der WO 2006/084548 A1 bekannt, die benutzte Behandlungsflüssigkeit mindestens zum Teil als Abwasser abzuführen. Dadurch gehen die unverbrauchten waschaktiven Substanzen verloren. Je nach Art der waschaktiven Substanzen kann es erforderlich sein, sie vor dem Ableiten in beispielsweise einen Abwasserkanal zu neutralisieren. Schließlich macht es die Ableitung der benutzten Behandlungsflüssigkeit erforderlich, für den nächsten Waschvorgang wieder Frischwasser einzusetzen. Aus den genannten Gründen ist die bisherige Ableitung der benutzten Behandlungsflüssigkeit unwirtschaftlich.So far it is common and for example from the WO 2006/084548 A1 known to dissipate the used treatment liquid at least in part as wastewater. As a result, the unused washing-active substances are lost. Depending on the nature of the washing-active substances, it may be necessary to neutralize them before draining into, for example, a sewer. Finally, the derivation of the used treatment liquid makes it necessary to use fresh water again for the next washing process. For the reasons mentioned, the previous derivation of the used treatment liquid is uneconomical.

Aus der DE 196 30 089 C1 ist ein Verfahren zur Aufbereitung von Abwässern aus beispielsweise einer Textilwäscherei bekannt. Hier wird gebrauchte Behandlungsflüssigkeit filtriert, um verbrauchte waschaktive Substanzen von unverbrauchten waschaktiven Substanzen zu trennen. Die unverbrauchten waschaktiven Substanzen aufweisende Behandlungsflüssigkeit wird dem Waschprozess wieder zugeführt, nachdem zuvor frisches Waschmittel zugegeben worden ist. Bei diesem bekannten Verfahren ist ein gezieltes Zudosieren von Waschmitteln nicht vorgesehen, so dass es zu einer unwirtschaftlichen Überdosierung kommen kann.From the DE 196 30 089 C1 For example, a process for the treatment of wastewater from, for example, a textile laundry is known. Here, used treatment liquid is filtered to separate spent washing-active substances from unused washing-active substances. The unused washing-active substances having Treatment liquid is returned to the washing process after previously adding fresh detergent. In this known method, a targeted dosing of detergents is not provided, so that it can lead to an uneconomical overdose.

Aus der DE 196 54 619 A1 ist ein Verfahren zum Aufbereiten und Wiederverwenden von Wasch- und Spülwasser bekannt. Bei diesem Verfahren finden eine Messung von im Waschprozess verbrauchten waschaktiven Substanzen und eine Nachdosierung statt. Weil verbrauchte waschaktive Substanzen Schmutz angesammelt haben und dadurch wachsen, ist die Menge der gemessenen verbrauchten waschaktiven Substanzen größer als die tatsächlich verbrauchte Menge waschaktiver Substanzen. Das Nachdosieren der gemessenen Menge waschaktiver Substanzen führt daher zu einer Überdosierung, die auch dieses bekannte Verfahren unwirtschaftlich macht.From the DE 196 54 619 A1 For example, a method for treating and reusing washing and rinsing water is known. In this process, a measurement of washed-in washing substances consumed in the washing process and a subsequent dosing take place. Because used washing-active substances accumulate dirt and thereby grow, the amount of measured washing-up substances consumed is larger than the actually consumed amount of washing-active substances. The replenishment of the measured amount of washing-active substances therefore leads to an overdose, which also makes this known method uneconomical.

Ausgehend vom Vorstehenden liegt der Erfindung die Aufgabe zugrunde, ein Verfahren zur Nassbehandlung von Wäsche zu schaffen, das gegenüber bekannten Verfahren eine größere Wirtschaftlichkeit aufweist.Based on the above, the present invention seeks to provide a method for wet treatment of laundry, which has a greater economy compared to known methods.

Ein Verfahren zur Lösung dieser Aufgabe weist die Maßnahmen des Anspruchs 1 auf. Demnach werden aus der von der Wäschestücken abgetrennten Behandlungsflüssigkeit verbrauchte waschaktive Substanzen entfernt. Die verbrauchten waschaktiven Substanzen binden den Schmutz, den die Behandlungsflüssigkeit aus dem vorangegangenen Waschvorgang mitgenommen hat. Durch das Entfernen der verbrauchten waschaktiven Substanzen wird somit zumindest größtenteils der Schmutz aus der Behandlungsflüssigkeit entfernt. Die Behandlungsflüssigkeit mit den restlichen unverbrauchten waschaktiven Substanzen kann dann für einen folgenden Waschvorgang wieder verwendet werden. Dadurch gehen unverbrauchte waschaktive Substanzen nicht verloren und sie brauchen auch zum Ableiten der Behandlungsflüssigkeit in das Abwassernetz nicht neutralisiert zu werden. Vor allem kann aufgrund des erfindungsgemäßen Verfahrens der Frischwasserverbrauch reduziert werden, weil die Behandlungsflüssigkeit mit den unverbrauchten waschaktiven Substanzen erneut zum Waschen der Wäschestücke einsetzbar ist. Es ist weiterhin vorgesehen, nach der Entfernung verbrauchter waschaktiver Substanzen aus der Behandlungsflüssigkeit den Gehalt der noch in derselben enthaltenen unverbrauchten waschaktiven Substanzen zu ermitteln. Der gemessene Gehalt der in der Behandlungsflüssigkeit noch vorhandenen unverbrauchten waschaktiven Substanzen wird verglichen mit einem Soll-Gehalt waschaktiver Substanzen in der Behandlungsflüssigkeit. Wenn dabei festgestellt wird, dass der gemessene Gehalt der in der Behandlungsflüssigkeit noch enthaltenen unverbrauchten waschaktiven Substanzen unter dem Soll-Gehalt liegt, werden gezielt frische waschaktive Substanzen der Behandlungsflüssigkeit zugegeben.A method for achieving this object comprises the measures of claim 1. Accordingly, spent washing-active substances are removed from the treatment liquid separated from the laundry. The spent washing-active substances bind the dirt that the treatment liquid has taken from the previous washing process. By removing the used washing-active substances, the dirt is thus at least for the most part removed from the treatment liquid. The treatment liquid with the remaining unused washing-active substances can then be reused for a subsequent washing process. As a result, unused washing-active substances are not lost and they also need not be neutralized for draining the treatment liquid into the sewage network. Above all, due to the method according to the invention, the fresh water consumption can be reduced, because the treatment liquid with the unused washing-active substances can be used again for washing the laundry items. It is further provided, after the removal of spent washing-active substances from the treatment liquid to determine the content of the still contained therein unused washing-active substances. The measured content of the unused washing-active substances remaining in the treatment liquid is compared with a target content of washing-active substances in the treatment liquid. If it is found that the measured content of the unused washing-active substances still contained in the treatment liquid is below the desired content, fresh washing-active substances are added to the treatment liquid in a targeted manner.

Es ist weiterhin vorgesehen, die verbrauchten waschaktiven Substanzen aus der Behandlungsflüssigkeit nach verschiedenen Behandlungsschritten der Wäschestücke zu entfernen, beispielsweise nach der Vorwäsche und nach der Klarwäsche. Es kann so die gesamte beim mehrstufigen Waschvorgang anfallende Behandlungsflüssigkeit mit den darin noch verwendeten waschaktiven Substanzen wieder verwendet werden.It is further envisaged to remove the used washing-active substances from the treatment liquid after various treatment steps of the items of laundry, for example after prewashing and after clear-washing. It is thus possible to reuse the entire treatment liquid obtained in the multi-stage washing process with the washing-active substances still used therein.

Es ist vorgesehen, dass die von verbrauchten waschaktiven Substanzen mindestens größtenteils befreiten Behandlungsflüssigkeiten je nach Bedarf den Wäschestücken vor der Vorwäsche und/oder vor der Klarwäsche zugeführt werden. Beispielsweise kann die höhere Temperaturen aufweisende Behandlungsflüssigkeit aus der vorangegangen Klarwäsche nach dem Abtrennen verbrauchter waschaktiver Substanzen einer erneuten Klarwäsche zugeführt werden, während die Behandlungsflüssigkeit von der Vorwäsche wieder der Vorwäsche zugeführt wird. Auf diese Weise braucht den jeweiligen Behandlungsflüssigkeiten keine nennenswerte Energie zugeführt zu werden, um sie wieder zu verwenden. Insbesondere muss die kältere Behandlungsflüssigkeit aus der Vorwäsche nicht aufgeheizt werden, um der Klarwäsche zugeführt zu werden.It is envisaged that the treatment liquids that are at least largely freed of spent detergent substances will be supplied to the laundry items as needed before the pre-wash and / or before the final wash. For example, the higher-temperature treatment liquid from the previous clear-wash may be recycled after separating spent wash-active substances, while the treatment liquid from the pre-wash is returned to the pre-wash. In this way, the respective treatment liquids no significant energy needs to be supplied in order to use them again. In particular, the colder treatment liquid from the pre-wash need not be heated to be supplied to the clear wash.

Es kann vorgesehen sein, dass mindestens einer zum Anfang der Trommel zurückgeführten Ablaufleitung von Behandlungsflüssigkeit aus der Trommel ein Filter zum Entfernen verbrauchter waschaktiver Substanzen aus der Behandlungsflüssigkeit zugeordnet ist. Es kann so die gesamte Behandlungsflüssigkeit, die während des Waschens der Wäschestücke anfällt, vor dem Spülen der Wäschestücke von verbrauchten waschaktiven Substanzen befreit werden. Vorzugsweise fällt Behandlungsflüssigkeit nach der Vorwäsche und der Klarwäsche an. Aus diesen getrennt anfallenden Behandlungsflüssigkeiten werden dann die verbrauchten waschaktiven Substanzen entfernt, bevor die Behandlungsflüssigkeit erneut zum Waschen eingesetzt wird.It can be provided that at least one return line of treatment liquid from the drum, which is returned to the beginning of the drum, is assigned a filter for removing spent washing-active substances from the treatment liquid. It can thus be the entire treatment liquid, which is obtained during the washing of the laundry items, freed of washed laundry substances before rinsing the laundry items. Preferably, treatment liquid is applied after prewashing and clear washing. The spent washing-active substances are then removed from these separately obtained treatment liquids before the treatment liquid is used again for washing.

Es ist nach einer weiteren bevorzugten Ausgestaltung des Verfahrens vorgesehen, die verbrauchten waschaktiven Substanzen mehrmals aus der Behandlungsflüssigkeit zu entfernen. Vorzugsweise ist beim Spülen der gewaschenen Wäschestücke in einer Entwässerungseinrichtung vorgesehen, verbrauchte waschaktive Substanzen aus der nach dem Waschen von den Wäschestücken abgetrennten Behandlungsflüssigkeit und auch von der vor dem Spülen in der Entwässerungseinrichtung von der Entwässerungseinrichtung abgetrennten Behandlungsflüssigkeit zu entfernen. Diese zweistufige Entfernung der verbrauchten waschaktiven Substanzen aus der Behandlungsflüssigkeit stellt in optimaler Weise von verbrauchten waschaktiven Substanzen befreite Behandlungsflüssigkeit mit darin im Wesentlichen nur noch vorhandenen unverbrauchten waschaktiven Substanzen für einen nachfolgenden Waschvorgang zur Verfügung, und zwar insbesondere für einen Waschvorgang mit einer getrennten Vor- und Klarwäsche. Der Frischwasserbedarf beträgt dadurch nur einen Bruchteil der zum nachfolgenden Waschvorgang benötigten Behandlungsflüssigkeit, wobei erforderlichenfalls nur die tatsächlich verbrauchten waschaktiven Substanzen zu ersetzen sind.It is provided according to a further preferred embodiment of the method to remove the used washing-active substances several times from the treatment liquid. Preferably, when the washed laundry is rinsed in a dehydrator, laundry-active substances are consumed from the treatment liquid separated from the laundry after washing and also from the dehydrator before rinsing in the dehydrator Remove separated treatment liquid. This two-stage removal of the spent wash-active substances from the treatment liquid optimally provides spent washing-active substances with essentially only existing unused washing-active substances therein for a subsequent washing operation, in particular for a washing operation with a separate pre-wash and clear wash , The fresh water requirement is thereby only a fraction of the treatment liquid required for the subsequent washing process, wherein, if necessary, only the actually used washing-active substances are to be replaced.

Bei einem bevorzugten Verfahren werden die verbrauchten waschaktiven Substanzen durch Filtration, vorzugsweise Präzisionsfiltration, von der Behandlungsflüssigkeit abgetrennt. Da verbrauchte waschaktive Substanzen durch die Schmutzaufnahme eine Partikelgröße aufweisen, die die Partikelgröße unverbrauchter waschaktiver Substanzen übersteigt, kann durch Filtration eine Trennung zwischen den unverbrauchten und verbrauchten waschaktiven Substanzen erfolgen. Weil die Partikelgrößen sich nur geringfügig unterscheiden, vor allem nur im Mikrometerbereich liegen, eignet sich eine Präzisionsfiltration besonders zum wirksamen Entfernen mindestens eines Großteils der verbrauchten waschaktiven Substanzen aus der Behandlungsflüssigkeit.In a preferred method, the spent wash-active substances are separated from the treatment liquid by filtration, preferably precision filtration. Since spent washing-active substances have a particle size that exceeds the particle size of unused washing-active substances due to the dirt pick-up, a separation between the unused and used washing-active substances can be carried out by filtration. Because the particle sizes differ only slightly, above all only in the micrometer range, precision filtration is particularly suitable for effectively removing at least a majority of the spent washing-active substances from the treatment liquid.

Eine vorteilhafte Weiterbildung des Verfahrens sieht es vor, vor dem Ausfiltern verbrauchter waschaktiver Substanzen aus der Behandlungsflüssigkeit eine Vorfiltration durchzuführen. Bei dieser Vorfiltration werden größere Schmutzpartikel beseitigt, die sich beim nachfolgenden Ausfiltern verbrauchter waschaktiver Substanzen, insbesondere durch eine Präzisionsfiltration, nicht mehr störend auswirken können, indem sie die empfindlichen Filter für die Präzisionsfiltration belasten oder gar zusetzen. Nach der Vorfiltration ist so eine besonders wirksame und zuverlässige Filtration mindestens eines Großteils der kleineren verbrauchten waschaktiven Substanzen möglich.An advantageous development of the method provides for a prefiltration to be carried out before filtering out used washing-active substances from the treatment liquid. This prefiltration eliminates large particles of dirt which, when subsequently filtering out used washing-active substances, in particular by means of precision filtration, can no longer have a disturbing effect by loading or even adding to the sensitive filters for precision filtration. After prefiltration, a particularly effective and reliable filtration of at least a majority of the smaller spent washing-active substances is possible.

Das Entfernen verbrauchter waschaktiver Substanzen aus der Behandlungsflüssigkeit erfolgt zweckmäßigerweise durch eine Mikro- und/oder Ultrafiltration. Hierdurch können gezielt verbrauchte waschaktive Substanzen aus der Behandlungsflüssigkeit entfernt werden. Es handelt sich hierbei bevorzugt um Partikel mit einer Größe zwischen 10 µm und 0,005 µm, vorzugsweise 1 µm bis 0,5 µm. Das ist die typische Partikelgröße verbrauchter waschaktiver Substanzen, so dass auf diese Weise zumindest ein Großteil der verbrauchten waschaktiven Substanzen entfernt wird, aber nicht die kleineren unverbrauchten waschaktiven Substanzen.The removal of spent washing-active substances from the treatment liquid is expediently carried out by micro- and / or ultrafiltration. As a result, specifically used wash-active substances can be removed from the treatment liquid. These are preferably particles with a size between 10 .mu.m and 0.005 .mu.m, preferably 1 .mu.m to 0.5 .mu.m. This is the typical particle size of spent washing-active substances, so that in this way at least a large part of the used washing-active substances is removed, but not the smaller unused washing-active substances.

Die Messung unverbrauchter waschaktiver Substanzen kann durch einen sogenannten Blasentensiometer, beispielsweise einen H2O2-Sensor oder einen CI_-Sensor, erfolgen. Auch andere für die Partikelgröße unverbrauchter waschaktiver Substanzen geeignete Messverfahren bzw. Sensoren kommen in Betracht.The measurement of unused washing-active substances can be carried out by a so-called bubble tensiometer, for example a H 2 O 2 sensor or a CI_ sensor. Other measuring methods or sensors suitable for the particle size of unused washing-active substances are also possible.

Das Nachdosieren frischer waschaktiver Substanzen geschieht in einem solche Maße, dass die Behandlungsflüssigkeit wieder einen Gehalt an unverbrauchten waschaktiven Substanzen aufweist, der dem Sollgehalt unverbrauchter waschaktiver Substanzen in der Behandlungsflüssigkeit entspricht oder etwas darüber liegt, vorzugsweise in einem gezielt gewählten Überschussspektrum.The replenishment of fresh washing-active substances is done to such an extent that the treatment liquid again has a content of unused washing-active substances, which corresponds to the nominal content of unused washing-active substances in the treatment liquid or slightly above, preferably in a deliberately selected excess spectrum.

Bevorzugte Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung näher erläutert. In dieser zeigen:

Fig. 1
eine schematische Seitenansicht der Vorrichtung nach einem ersten Ausführungsbeispiel der Erfindung, und
Fig. 2
eine schematische Seitenansicht der Vorrichtung nach einem zweiten Ausführungsbeispiel der Erfindung.
Preferred embodiments of the invention will be explained in more detail with reference to the drawing. In this show:
Fig. 1
a schematic side view of the device according to a first embodiment of the invention, and
Fig. 2
a schematic side view of the device according to a second embodiment of the invention.

Die hier gezeigten Vorrichtungen bilden eine Waschstraße zum Nassbehandeln von Wäschestücken. Bei der Nassbehandlung handelt es sich um das Waschen, Spülen und Entwässern. Als Wäschestücke kommen alle üblicherweise zu waschenden textilen Gegenstände in Betracht, und zwar insbesondere Bekleidung, einschließlich Berufsbekleidung, Tischwäsche, Bettwäsche, Fußmatten, Eingangsmatten und Ähnliches.The devices shown here form a washing line for the wet treatment of laundry items. The wet treatment is washing, rinsing and dewatering. As garments are all commonly used to washing textile articles into consideration, in particular clothing, including workwear, table linen, bed linen, floor mats, entrance mats and the like.

Die in den Figuren dargestellten Vorrichtungen weisen eine Durchlaufwaschmaschine und eine Entwässerungseinrichtung auf. Bei der Entwässerungseinrichtung kann es sich um eine Zentrifuge oder eine in den Figuren gezeigte Entwässerungspresse handeln.The devices shown in the figures comprise a continuous washing machine and a drainage device. The dewatering device may be a centrifuge or a dewatering press shown in the figures.

Die Durchlaufwaschmaschine 10 der Fig. 1 verfügt über eine um eine vorzugsweise horizontale Drehachse 12 drehend antreibbare, zylindrische Trommel 13. In der Trommel 13 sind durch quergerichtete Trennwände 14 mehrere in Durchlaufrichtung 15 der nicht gezeigten Wäschestücke durch die Trommel 13 aufeinanderfolgende Kammern 16 gebildet.The continuous washing machine 10 of the Fig. 1 has a about a preferably horizontal axis of rotation 12 rotatably drivable, cylindrical drum 13. In the drum 13 are formed by transverse partitions 14 more in the direction of passage 15 of the laundry items not shown by the drum 13 consecutive chambers 16.

In der Trommel 13 der Durchlaufwaschmaschine 10 des Ausführungsbeispiels der Fig. 1 befinden sich im Wesentlichen drei Behandlungszonen, und zwar eine Vorwaschzone 17, eine darauffolgende Klarwaschzone 18 und schließlich eine am Ende der Trommel 13 angeordnete Spülzone 19. Bei der Durchlaufwaschmaschine 10 der Fig. 1 verfügen sowohl die Vorwaschzone 17 als auch die Klarwaschzone 18 über zwei aufeinanderfolgende Kammern 16. Demgegenüber weist die Spülzone 19 nur eine einzige Kammer 16 auf. Insgesamt verfügt somit die Durchlaufwaschmaschine 10 über fünf Kammern 16. Die Erfindung ist hierauf aber nicht beschränkt. Vielmehr kann die Anzahl der Kammern 16 vom gezeigten Ausführungsbeispiel abweichen. Vor allem können die Vorwaschzone 17, die Klarwaschzone 18 und die Spülzone 19 über eine größere oder auch kleinere Anzahl von Kammern als in der Fig. 1 dargestellt verfügen.In the drum 13 of the continuous washing machine 10 of the embodiment of Fig. 1 are essentially three treatment zones, namely a prewash zone 17, a subsequent final wash zone 18 and finally a rinse zone 19 arranged at the end of the drum 13. In the continuous washing machine 10 of FIG Fig. 1 Both the pre-wash zone 17 and the final wash zone 18 have two successive chambers 16. In contrast, the rinse zone 19 only a single chamber 16. Overall, therefore, the continuous washing machine 10 has five chambers 16. The invention is, however, not limited thereto. Rather, the number of chambers 16 may differ from the embodiment shown. Above all, the prewash zone 17, the final wash zone 18 and the rinse zone 19 can have a larger or smaller number of chambers than in the Fig. 1 have shown.

Der Durchlaufwaschmaschine 10 ist die Entwässerungspresse 16, in Durchlaufrichtung 15 gesehen, nachgeordnet. Die gewaschenen und gespülten Wäschestücke gelangen aus der Durchlaufwaschmaschine 10 über eine am Ende derselben angeordnete Entladerutsche 20 in die Entwässerungspresse 11. Die Entwässerungspresse 11 ist in prinzipiell bekannter Weise ausgebildet. So verfügt die Entwässerungspresse 11 über ein oben und unten offenes Pressengehäuse, vorzugsweise einen zylindrischen Pressenkorb 21 mit einer flüssigkeitsundurchlässigen, zylindrischen Mantelfläche und einen im Pressenkorb 21 auf- und abbewegbaren Pressenstempel 22, der in der Fig. 1 nur andeutungsweise (gestrichelt) dargestellt ist. Der Pressenstempel 22 ist durch einen Hydraulikzylinder so weit hochfahrbar, dass er insbesondere zum Beladen der Entwässerungspresse 11 sich oberhalb des Pressenkorbs 21 befindet und dadurch eine obere Öffnung des Pressenkorbs 21 vollständig freigibt. Zum Entwässern der Wäschestücke ist der Pressenstempel 22 in den Pressenkorb 21 hineinpressbar, wobei der Pressenstempel 22 im Wesentlichen flüssigkeitsdicht im Inneren der Mantelfläche des Pressenkorbs 21 abgedichtet ist. Unterhalb des Pressenkorbs 21 befindet sich ein Sammeltank 23 oder eine sonstige Einrichtung zum Auffangen der aus den Wäschestücken ausgepressten Behandlungsflüssigkeit.The continuous washing machine 10 is the dewatering press 16, seen in the direction of passage 15, downstream. The washed and rinsed laundry items reach the dewatering press 11 from the continuous washing machine 10 via an unloading chute 20 arranged at the end thereof. The dewatering press 11 is designed in a manner known in principle. Thus, the dewatering press 11 has a top and bottom open press housing, preferably a cylindrical press cage 21 with a liquid-impermeable, cylindrical lateral surface and a press ram 22 which can be moved up and down in the press basket 21 and which is in the Fig. 1 only hinted (dashed) is shown. The press ram 22 can be raised so far by a hydraulic cylinder that it is located above the press basket 21, in particular for loading the dewatering press 11, thereby completely releasing an upper opening of the press basket 21. For dewatering the items of laundry, the press ram 22 can be pressed into the press basket 21, wherein the press ram 22 is sealed in a substantially liquid-tight manner inside the jacket surface of the press basket 21. Below the press basket 21 is a collection tank 23 or other means for collecting the pressed out of the laundry treatment liquid.

Vom Ende der Vorwaschzone 17 zweigt eine Ablaufleitung 24 ab. Die Ablaufleitung 24 führt zu einem Vorfilter 25 und von diesem zu einem Filter 26 zum Abtrennen verbrauchter waschaktiver Substanzen aus der durch die Ablaufleitung 24 aus der Vorwaschzone 17 abgeführten Behandlungsflüssigkeit. Vom Filter 26 aus mündet die Ablaufleitung 24 in eine Abzweigstelle 27. Von der Abzweigstelle 27 führt eine Rücklaufleitung 28 zum Anfang der Durchlaufwaschmaschine 10, nämlich im gezeigten Ausführungsbeispiel zu einem Einlauftrichter 29, womit die zu waschenden Wäschestücke der Trommel 13 zuführbar sind.From the end of the prewashing zone 17, a drain line 24 branches off. The drain line 24 leads to a prefilter 25 and from there to a filter 26 for separating spent washing-active substances from the discharged through the drain line 24 from the prewashing zone 17 treatment liquid. From the filter 26, the drain line 24 opens into a branch point 27. From the branch point 27 performs a return line 28 to the beginning of the continuous washing machine 10, namely in the embodiment shown to an inlet funnel 29, with which the laundry items to be washed drum 13 can be fed.

Am Ende der Klarwaschzone 18 ist eine weitere Ablaufleitung 30 angeordnet, die wiederum zu einem Vorfilter 31 und danach zu einem Filter 32 zum Abtrennen verbrauchter waschaktiver Substanzen aus der Behandlungsflüssigkeit führt. Vom Filter 32 führt die Ablaufleitung 30 weiter zu einer Abzweigstelle 33. Von der Abzweigstelle 33 ist über eine Verbindungsleitung 34 die gefilterte Behandlungsflüssigkeit mit restlichen unverbrauchten waschaktiven Substanzen, aber abgefilterten verbrauchten waschaktiven Substanzen, der Abzweigstelle 27 zuführbar, von wo aus die aus der Klarwaschzone 18 kommende, gefilterte Behandlungsflüssigkeit über die Rücklaufleitung 28 dem Einlauftrichter 29 vor der Trommel 13 der Durchlaufwaschmaschine 10 zuführbar ist.At the end of the final wash zone 18, a further drain line 30 is arranged, which in turn leads to a prefilter 31 and then to a filter 32 for separating spent wash-active substances from the treatment liquid. From the filter 32, the drain line 30 continues to a branch 33. From the branch 33, the filtered treatment liquid with remaining unused washing-active substances, but filtered spent washing-active substances, the branch point 27 can be fed from a branch line 34, from where the from the final wash zone 18th incoming, filtered treatment liquid via the return line 28 to the inlet funnel 29 in front of the drum 13 of the continuous washing machine 10 can be fed.

Vom Filter 32 zweigt eine zweite Leitung, nämlich eine Rücklaufleitung 35, ab. Diese Rücklaufleitung 35 führt über eine weitere Abzweigstelle 36 zur Rücklaufleitung 37, von der die gefilterte Behandlungsflüssigkeit ohne verbrauchte waschaktive Substanzen, aber noch mit einem Rest nicht verbrauchter waschaktiver Substanzen zum Anfang der Klarwaschzone 18 zurückführbar ist.From the filter 32 branches off a second line, namely a return line 35, from. This return line 35 leads via a further branch point 36 to the return line 37, from which the filtered treatment liquid without spent washing-active substances, but still with a residue of unused washing-active substances to the beginning of the final wash zone 18 is traceable.

Die Spülzone 19 weist einen Überlauf 38 auf, der zu einem Sammeltank 39 führt. Vom Sammeltank 39 zweigt eine Zwischenleitung 40 ab, die zur Abzweigstelle 36 in der Rücklaufleitung 37 führt.The rinse zone 19 has an overflow 38 which leads to a collection tank 39. From the collection tank 39 branches off an intermediate line 40, which leads to the branch point 36 in the return line 37.

Vom Sammeltank 23 der Entwässerungspresse 11 zweigen zwei Rücklaufleitungen 41 und 42 ab. Die Rücklaufleitung 41 führt zur Abzweigstelle 33, von wo aus die Behandlungsflüssigkeit aus dem Sammeltank 23 dem Einlauftrichter 29 vor der Trommel 13 zuführbar ist. Die Rücklaufleitung 42 aus dem Sammeltank 23 ist zurückgeführt zur Spülzone 19, also der letzten Kammer 16 der Durchlaufwaschmaschine 10.From the collection tank 23 of the dewatering press 11 branches off two return lines 41 and 42. The return line 41 leads to the branching point 33, from where the treatment liquid from the collecting tank 23 can be fed to the inlet funnel 29 in front of the drum 13. The return line 42 from the collection tank 23 is returned to the rinsing zone 19, so the last chamber 16 of the continuous washing machine 10th

In besonderer Weise sind die Filter 26 und 32 ausgebildet. Es kann sich hierbei um die gleichen Filter handeln, die eine Präzisionsfiltration der aus der Vorwaschzone 17 bzw. der Klarwaschzone 18 stammenden Behandlungsflüssigkeit ermöglichen. Bei dieser Behandlungsflüssigkeit handelt es sich um Waschwasser, das angereichert ist mit waschaktiven Substanzen, von denen einige durch Schmutzaufnahme verbraucht sind, während ein Teil überschüssiger waschaktiver Substanzen auch nach der Vor- bzw. Klarwäsche noch unverbraucht ist. Die Filter 26 und 32 trennen nur verbrauchte waschaktive Substanzen aus der Behandlungsflüssigkeit ab, aber keine eine geringere Partikelgröße aufweisende unverbrauchte waschaktive Substanzen. Zu diesem Zweck sind die Filter 26 und 32 als Mikro- und/oder Ultrafilter ausgebildet, die geeignet sind, Partikel von der Größe der verbrauchten waschaktiven Substanzen aus der Flüssigkeit auszufiltern. Solche Filter 26 und 32 ermöglichen es, aus der Behandlungsflüssigkeit Partikel mit einer Größe von 0,005 µm bis 10 µm, vorzugsweise 0,5 µm bis 1 µm, auszufiltern.In a special way, the filters 26 and 32 are formed. These may be the same filters which allow a precision filtration of the treatment liquid originating from the prewash zone 17 or the final wash zone 18. This treatment liquid is washing water enriched with washing-active substances, some of which have been consumed by dirt absorption, while a part of excess washing-active substances is still unused even after pre-washing or clear-washing. The filters 26 and 32 separate only used washing-active substances from the treatment liquid, but no smaller particle size unused washing-active substances. For this purpose, the filters 26 and 32 are designed as micro and / or ultrafilters which are suitable for filtering out particles of the size of the spent washing-active substances from the liquid. Such filters 26 and 32 make it possible to filter out of the treatment liquid particles having a size of 0.005 .mu.m to 10 .mu.m, preferably 0.5 .mu.m to 1 .mu.m.

Bei den Filtern 26 und 32 handelt es sich bevorzugt um Membranfilter. Es kommen aber auch andere Filter in Betracht, die geeignet sind, eine Präzisionsfiltration, vor allem eine Mikro- und/oder Ultrafiltration, durchzuführen, insbesondere Partikel der vorstehend genannten Größenbereiche aus der Behandlungsflüssigkeit auszufiltern. Die Membranfilter sind bevorzugt als Wickelfilter ausgebildet und/oder mit Stützkörpern versehen. Bei den Stützkörpern handelt es sich in erster Linie um keramische Stützkörper.The filters 26 and 32 are preferably membrane filters. But there are also other filters into consideration, which are suitable to perform a precision filtration, especially a micro- and / or ultrafiltration, in particular to filter out particles of the aforementioned size ranges from the treatment liquid. The membrane filters are preferably designed as a wound filter and / or provided with support bodies. The support bodies are primarily ceramic support bodies.

Die Filter 26 und 32 können nach dem Cross-Flow-Prinzip, aber auch nach dem Dead-End-Prinzip arbeiten.The filters 26 and 32 can work on the cross-flow principle, but also on the dead-end principle.

Das erfindungsgemäße Verfahren läuft mit der zuvor beschriebenen Vorrichtung gemäß der Fig. 1 wie folgt ab:The inventive method runs with the device described above according to the Fig. 1 as follows:

Die zu waschenden Wäschestücke gelangen über den Einlauftrichter 29 ins eingangsseitige Ende der Trommel 13 der Durchlaufwaschmaschine 10. Die Wäschestücke werden dabei mit gefilterter Behandlungsflüssigkeit sowohl aus der Vorwaschzone 17, der Klarwaschzone 18 als auch aus der Entwässerungspresse 11 eingeschwemmt. Bei der Behandlungsflüssigkeit handelt es sich in der Regel um Wasser, das einen gewissen Gehalt an waschaktiven Substanzen, in der Regel Waschmittel, Tenside und dergleichen aufweist. Der insbesondere beim Waschen der Wäschestücke anfallende Schmutz wird von den waschaktiven Substanzen gebunden, wodurch diese in der Größe zunehmen. Solche waschaktiven Substanzen sind durch die Schmutzbindung verbraucht. Üblicherweise enthält das Wasser zur Bildung der Behandlungsflüssigkeit überschüssige waschaktive Substanzen, so dass nach dem Waschen der Wäsche in der Behandlungsflüssigkeit nicht nur verbrauchte waschaktive Substanzen, die Schmutz gebunden haben, enthalten sind, sondern auch noch unverbrauchte waschaktive Substanzen.The items to be washed pass through the inlet funnel 29 into the inlet end of the drum 13 of the continuous washing machine 10. The items of laundry are flooded with filtered treatment liquid from both the pre-wash zone 17, the final wash zone 18 and the dewatering press 11. The treatment liquid is usually water, which has a certain content of washing-active substances, as a rule detergents, surfactants and the like. The particular incurred during washing the laundry debris is bound by the washing-active substances, whereby they increase in size. Such detergent substances are consumed by the dirt binding. Usually, the water contains excess washing-active substances to form the treatment liquid, so that after washing the laundry in the treatment liquid, not only spent washing-active substances which have bound dirt are contained, but also unused washing-active substances.

Nach der Vorwäsche der Wäschestücke wird am Ende der Vorwaschzone 17 die Behandlungsflüssigkeit über die Ablaufleitung 24 zunächst am Vorfilter 25 vorgefiltert. Dabei werden Partikel aus der Behandlungsflüssigkeit entfernt, die größer sind als die Partikel verbrauchter und unverbrauchter waschaktiver Substanzen. Anschließend wird die Behandlungsflüssigkeit im Filter 26 mindestens größtenteils von verbrauchten waschaktiven Substanzen, die mit Schmutz aus der Vorwaschzone 17 angereichert sind, befreit. Es werden nur verbrauchte waschaktive Substanzen im Filter 26 von der Behandlungsflüssigkeit abgetrennt, aber keine unverbrauchten waschaktiven Substanzen. Weil die unverbrauchten waschaktiven Substanzen keinen Schmutz aufgenommen haben und deshalb kleiner sind als die verbrauchten waschaktiven Substanzen, belässt der Filter 26 die noch unverbrauchten waschaktiven Substanzen in der Behandlungsflüssigkeit. Die vom Vorfilter 25 abgefilterten größeren Partikel und die vom Filter 26 von der Behandlungsflüssigkeit abgetrennten verbrauchten waschaktiven Substanzen werden am Vorfilter 25 bzw. am Filter 26 abgeführt. Den Filter 26 verlässt nur noch oder im Wesentlichen nur noch unverbrauchte waschaktive Substanzen enthaltende Behandlungsflüssigkeit. Diese wird über die Abzweigstelle 27 und die Rücklaufleitung 28 dem Einlautrichter 29 vor der Durchlaufwaschmaschine 10 zugeführt zum Einschwemmen von Wäschestücken, die im nächsten Waschgang von der Durchlaufwaschmaschine 10 gewaschen werden sollen.After prewashing the laundry items, the treatment liquid is prefiltered via the drain line 24 initially at the pre-filter 25 at the end of the pre-wash zone 17. In this case, particles are removed from the treatment liquid, which are larger than the particles of spent and unused washing-active substances. Subsequently, the treatment liquid in the filter 26 is at least largely freed from spent wash-active substances enriched with dirt from the prewash zone 17. Only used washing-active substances in the filter 26 are separated from the treatment liquid, but no unused washing-active substances. Because the unused washing-active substances have not absorbed any dirt and are therefore smaller than the used washing-active substances, the filter 26 leaves the still unused washing-active substances in the treatment liquid. The larger particles filtered off from the pre-filter 25 and the spent washing-active substances separated from the filter 26 by the treatment liquid are removed at the pre-filter 25 and at the filter 26. The filter 26 leaves only or substantially only unused washing-active substances containing treatment liquid. This is supplied via the branching point 27 and the return line 28 to the inlet funnel 29 in front of the continuous washing machine 10 for the purpose of washing laundry items which are to be washed by the continuous washing machine 10 in the next washing cycle.

Auch am Ende der Klarwaschzone 18 wird die Behandlungsflüssigkeit von den gewaschenen Wäschestücken getrennt. Diese Behandlungsflüssigkeit gelangt über die Ablaufleitung 30 zum Vorfilter 31 und danach zum Filter 32. Am Vorfilter 31 werden wie am Vorfilter 25 größere Partikel als verbrauchte waschaktive Substanzen abgefiltert, während der Filter 32 wiederum wie der Filter 26 verbrauchte waschaktive Substanzen von der Behandlungsflüssigkeit trennt. Diesen Filter 32 verlassende Behandlungsflüssigkeit mit im Wesentlichen nur noch unverbrauchten waschaktiven Substanzen gelangt je nach Bedarf entweder über die Abzweigstelle 33, die Verbindungsleitung 34 und die Rücklaufleitung 28 zum Einlauftrichter 29 vor der Trommel 13 oder über die Rücklaufleitung 35, die Abzweigstelle 36 und die Rücklaufleitung 37 zum Anfang der Klarwaschzone 18. Durch ein entsprechendes, nicht gezeigtes Ventil und eine diesem zugeordnete Steuerung wird gezielt im Wesentlichen nur noch unverbrauchte waschaktive Substanzen enthaltende Behandlungsflüssigkeit zum Einlauftrichter 29 oder zum Anfang der Klarwaschzone 18 geleitet.Also at the end of the final wash zone 18, the treatment liquid is separated from the washed laundry. This treatment liquid passes via the drain line 30 to the pre-filter 31 and then to the filter 32. At the pre-filter 31 as the pre-filter 25 larger particles are filtered out as spent washing-active substances, while the filter 32, in turn, like the filter 26 separates spent washing-active substances from the treatment liquid. This treatment 32 leaving treatment liquid with essentially only fresh laundry substances passes as needed either via the branch point 33, the connecting line 34 and the return line 28 to the inlet funnel 29 in front of the drum 13 or via the return line 35, the branch point 36 and the return line 37th to the beginning of the final wash zone 18. By means of a corresponding valve, not shown, and a control associated therewith, essentially only unused washing-active substances-containing treatment liquid is directed to the inlet funnel 29 or to the beginning of the final wash zone 18.

Vom Überlauf 38 der Spülzone 19 gelangt überschüssige Spülflüssigkeit in den Sammeltank 39. Vom Sammeltank 39 kann das Spülwasser bei Bedarf über die Zwischenleitung 40 und die Abzweigstelle 36 durch die Rücklaufleitung 37 an den Anfang der Klarwaschzone 18 geleitet werden.From the overflow 38 of the rinse zone 19 excess rinse liquid passes into the collection tank 39. From the collection tank 39, the rinse water can be passed through the return line 37 to the beginning of the final wash zone 18 if necessary via the intermediate line 40 and the branching point 36.

Vom Sammeltank 23 der Entwässerungspresse 11 gelangt von der Entwässerungspresse 11 ausgepresste Spülflüssigkeit entweder über die Rücklaufleitung 41 zur Abzweigstelle 33 und von dort über die Verbindungsleitung 34, die Abzweigstelle 27 und die Rücklaufleitung 28 zum Einlauftrichter 29 vor der Trommel 13 oder über die Rücklaufleitung 42 zurück zur Spülzone 19. Das Spülwasser aus dem Sammeltank 23 unter der Entwässerungspresse 11 kann je nach Bedarf durch entsprechende nicht gezeigte Ventile entweder zum Einlauftrichter 29 oder zur Spülzone 19 geleitet werden.From the collecting tank 23 of the dewatering press 11, rinsing liquid pressed out by the dewatering press 11 passes either via the return line 41 to the branching point 33 and from there via the connecting line 34, the branching point 27 and the return line 28 to the inlet funnel 29 in front of the drum 13 or via the return line 42 Rinsing zone 19. The rinsing water from the collecting tank 23 under the dewatering press 11 can be directed either to the inlet hopper 29 or to the rinsing zone 19 as needed by corresponding valves, not shown.

Das beschriebene Verfahren ermöglicht es, von verbrauchten waschaktiven Substanzen, insbesondere verbrauchten Tensiden, befreite Behandlungsflüssigkeit aus der Vorwaschzone 17 und der Klarwaschzone 18 zurückzuleiten zum Einlauftrichter 29 vor der Durchlaufwaschmaschine 10, so dass diese von verbrauchten waschaktiven Substanzen befreite Behandlungsflüssigkeit wieder verwendet werden kann zum Waschen eines nachfolgenden Postens von Wäschestücken-.The process described makes it possible to recirculate freed treatment liquid from the prewash zone 17 and the final wash zone 18 from spent wash-active substances, in particular spent surfactants, to the inlet funnel 29 in front of the continuous washing machine 10, so that this treatment liquid freed of spent washing-active substances can be used again for washing a washing liquid subsequent item of laundry items.

Nach einer Ausbildung des Verfahrens werden nicht verbrauchte waschaktive Substanzen in der gefilterten Behandlungsflüssigkeit während des Betriebs der Vorrichtung vorzugsweise kontinuierlich gemessen durch beispielsweise ein Blasentensiometer, einen H2O2-Sensor, einen CI_-Sensor oder dergleichen. Die gemessene Konzentration unverbrauchter waschaktiver Substanzen wird dann verglichen mit einer Sollkonzentration waschaktiver Substanzen in der Behandlungsflüssigkeit. Wird bei diesem Vergleich festgestellt, dass die Konzentration der noch in der Behandlungsflüssigkeit vorhandenen restlichen waschaktiven Substanzen unterhalb der Sollkonzentration liegt, werden frische waschaktive Substanzen der Behandlungsflüssigkeit zugemischt, und zwar vorzugsweise im Bereich der Rücklaufleitung 28. Dieses Zumischen neuer waschaktiver Substanzen geschieht in einem solchen Maße, dass die Sollkonzentration waschaktiver Substanzen in der zurückgeführten Behandlungsflüssigkeit wieder hergestellt wird oder vorzugsweise innerhalb eines festgelegten Bereichs überschritten wird.According to an embodiment of the method, unused wash-active substances in the filtered treatment liquid are preferably continuously measured during operation of the device, for example by means of a bubble tensiometer, a H 2 O 2 sensor, a CI_ sensor or the like. The measured concentration of unused washing-active substances is then compared with a Target concentration of washing-active substances in the treatment liquid. If it is found in this comparison that the concentration of the remaining washing-active substances still present in the treatment liquid is below the desired concentration, fresh detergent-active substances are admixed to the treatment liquid, preferably in the area of the return line 28. This admixing of new washing-active substances takes place to such an extent in that the desired concentration of washing-active substances in the recycled treatment liquid is restored or is preferably exceeded within a defined range.

Durch die erfindungsgemäßen Verfahren gehen noch unverbrauchte waschaktive Substanzen in der Behandlungsflüssigkeit nicht verloren; sie können vielmehr quasi restlos verbraucht werden. Es wird somit keine Behandlungsflüssigkeit mit unverbrauchten waschaktiven Substanzen in den Abfluss geleitet. Vor allem brauchen restliche waschaktive Substanzen in der Behandlungsflüssigkeit vor dem Ableiten in den Abfluss nicht neutralisiert zu werden. Außerdem kann durch die Wiederverwendung der noch einen Rest an unverbrauchten waschaktiven Substanzen enthaltende Behandlungsflüssigkeit der Frischwasserbedarf erheblich gesenkt werden. Durch die somit von den erfindungsgemäßen Verfahren ermöglichte Reduzierung des Frischwasserbedarfs und die vollständige Nutzung aller unverbrauchter waschaktiver Substanzen wird die Wirtschaftlichkeit des Waschprozesses deutlich gesteigert.By means of the process according to the invention, unused washing-active substances are not lost in the treatment liquid; they can be consumed almost completely. Thus, no treatment liquid with unused washing-active substances is conducted into the drain. Above all, residual wash-active substances in the treatment liquid need not be neutralized before being discharged into the drain. In addition, the reuse of the still remaining unused washing-active substances containing treatment liquid of the fresh water requirement can be significantly reduced. As a result of the reduction of the fresh water requirement thus made possible by the methods according to the invention and the complete utilization of all fresh washing-active substances, the economy of the washing process is significantly increased.

Die Fig. 2 zeigt eine Vorrichtung nach einem zweiten Ausführungsbeispiel der Erfindung. Diese Vorrichtung verfügt auch über eine Durchlaufwaschmaschine 45 und eine Entwässerungspresse 46 oder eine andere Entwässerungseinrichtung, beispielsweise eine Wäscheschleuder. Die Durchlaufwaschmaschine 45 ist prinzipiell wie die Durchlaufwaschmaschine 10 ausgebildet. Deshalb werden für gleiche Teile gleiche Bezugsziffern verwendet. Auch die Durchlaufwaschmaschine 45 verfügt im gezeigten Ausführungsbeispiel über fünf in Durchlaufrichtung 15 aufeinanderfolgende Kammern 16. Allerdings bilden die fünf Kammern 16 in der Durchlaufwaschmaschine 45 nur eine Vorwaschzone 47 aus zwei Kammern 16 und eine Klarwaschzone 48 aus drei Kammern 16. Die Anzahl der Kammern der Vorwaschzone 47 und der Klarwaschzone 48 kann aber vom gezeigten Ausführungsbeispiel abweichen, nämlich sowohl größer als auch kleiner sein. In der Regel verfügt aber die Klarwaschzone 48 über eine größere Anzahl von Kammern als die Vorwaschzone 47.The Fig. 2 shows a device according to a second embodiment of the invention. This apparatus also has a continuous washing machine 45 and a dewatering press 46 or other dewatering device, such as a spin dryer. The continuous washing machine 45 is designed in principle like the continuous washing machine 10. Therefore, the same reference numerals are used for the same parts. Also, the continuous washing machine 45 has in the illustrated embodiment, five in the direction of passage 15 consecutive chambers 16. However, the five chambers 16 in the continuous washing machine 45 only one prewash zone 47 of two chambers 16 and a clear wash zone 48 of three chambers 16. The number of chambers of prewash 47 and the clear-wash zone 48 may, however, deviate from the embodiment shown, namely be both larger and smaller. As a rule, however, the clear-wash zone 48 has a larger number of chambers than the pre-wash zone 47.

Die Durchlaufwaschmaschine 45 verfügt über keine Spülzone. Das Spülen findet demnach nicht in der Durchlaufwaschmaschine 45 statt. Vielmehr erfolgt bei der hier gezeigten Vorrichtung das Spülen in der Entwässerungseinrichtung, also beim gezeigten Ausführungsbeispiel in der Entwässerungspresse 46. Diese hat somit zwei Funktionen, dient nämlich zum Abtrennen eines größeren Teils der Behandlungsflüssigkeit (Klarwaschflüssigkeit) aus der Klarwaschzone 48 der Durchlaufwaschmaschine 45 und zum anschließenden Spülen der Wäschestücke, wozu der Entwässerungspresse 46 über eine nur andeutungsweise in der Fig. 2 gezeigte Zufuhrleitung 49 Frischwasser zuführbar ist.The continuous washing machine 45 has no rinsing zone. The rinsing therefore does not take place in the continuous washing machine 45. Rather, in the apparatus shown here, the rinsing in the dewatering device, ie in the embodiment shown in the dewatering press 46. This thus has two functions, namely serves to separate a major part of the treatment liquid (clear wash) from the final wash 48 of the continuous washing machine 45 and the subsequent Rinsing the laundry, including the dewatering press 46 via an only hinted in the Fig. 2 shown supply line 49 fresh water can be supplied.

Die Durchlaufwaschmaschine 45 weist am Ende der Vorwaschzone 47 eine Ablaufleitung 50 auf, die zu einem Vorfilter 51 und von diesem zu einem insbesondere zur Präzisionsfiltration dienenden Filter 52 führt. Der Vorfilter 51 und der Filter 52 sind wie die Vorfilter 25 und 31 und Filter 26 und 32 des ersten Ausführungsbeispiels ausgebildet und haben den gleichen Zweck. Vom Filter 52 gelangt die aus der Vorwaschzone 17 kommende und von verbrauchten waschaktiven Substanzen befreite Behandlungsflüssigkeit über eine Abzweigstelle 53 zur Rücklaufleitung 54, die zum Einlauftrichter 29 vor der Durchlaufwaschmaschine 45 führt.The continuous washing machine 45 has, at the end of the prewashing zone 47, a discharge line 50 which leads to a prefilter 51 and from this to a filter 52, which in particular serves for precision filtration. The pre-filter 51 and the filter 52 are formed like the pre-filters 25 and 31 and filters 26 and 32 of the first embodiment and have the same purpose. From the filter 52, the treatment liquid coming from the prewashing zone 17 and freed of spent washing-active substances passes via a branching point 53 to the return line 54, which leads to the inlet funnel 29 in front of the continuous washing machine 45.

Vom Sammeltank 23 unter der Entwässerungspresse 46 verläuft eine Ablaufleitung 55 zu einem Vorfilter 56 und einem darauffolgenden Filter 57. Der Vorfilter 56 und der Filter 57 sind wie der Vorfilter 51 und der Filter 52 ausgebildet, dienen nämlich dazu, zunächst gröbere Partikel aus der Behandlungsflüssigkeit zu trennen und dann verbrauchte waschaktive Substanzen abzuscheiden. Vom Filter 57 kann die von verbrauchten waschaktiven Substanzen mindestens größtenteils befreite Behandlungsflüssigkeit über eine Verbindungsleitung 58 und eine Abzweigstelle 59 zur Abzweigstelle 53 und von dort über die Rücklaufleitung 54 zum Einlauftrichter 29 der Durchlaufwaschmaschine 45 gelangen. Vom Filter 57 geht des Weiteren eine Ablaufleitung 60 aus, die zurückgeführt ist zum Anfang der Vorwaschzone 17. Durch der Verbindungsleitung 58 und der Ablaufleitung 60 am Ausgang des Filters 57 zugeordnete Ventile kann über eine entsprechende Steuerung die von verbrauchten waschaktiven Substanzen befreite Flüssigkeit entweder vor die Durchlaufwaschmaschine 45 oder zum Anfang der Vorwaschzone 47 geleitet werden.From the collecting tank 23 under the dewatering press 46, a discharge line 55 extends to a prefilter 56 and a subsequent filter 57. The prefilter 56 and the filter 57 are formed like the prefilter 51 and the filter 52, namely serve to first coarser particles from the treatment liquid and then remove used washing-active substances. From the filter 57, the spent washing active substances at least largely freed from spent washing liquid via a connecting line 58 and a branch point 59 to the branch point 53 and from there via the return line 54 to the inlet hopper 29 of the continuous washing machine 45 reach. From the filter 57 further goes out a drain line 60, which is returned to the beginning of the prewashing zone 17. Through the connecting line 58 and the drain line 60 at the output of the filter 57 associated valves can be freed of spent washing-active substances either before the liquid via a corresponding control Continuous washing machine 45 or to the beginning of the prewashing zone 47 are passed.

Vom Sammeltank 23 unter der Entwässerungspresse 46 zweigt eine zweite Verbindungsleitung 61 ab, die zur Abzweigstelle 59 führt und von dort über die Abzweigstelle 53 und die Rücklaufleitung 54 zum Einlauftrichter 29 vor der Durchlaufwaschmaschine 54. Auch die Verbindungsleitungen 58 und 61 des Sammeltanks 23 sind mit Ventilen versehen, wodurch der Abfluss der Behandlungsflüssigkeit aus dem Sammeltank 23 gezielt steuerbar ist, so dass die Behandlungsflüssigkeit aus dem Sammeltank 23 auch unter Umgehung des Vorfilters 56 und des Filters 57 vor die Durchlaufwaschmaschine 45 gelangen kann.From the collection tank 23 under the dewatering press 46 branches off a second connecting line 61, which leads to the branch point 59 and from there via the branch point 53 and the return line 54 to the inlet hopper 29 before the continuous washing machine 54. Also, the connecting lines 58 and 61 of the collecting tank 23 with valves provided, whereby the outflow of the treatment liquid from the collection tank 23 targeted is controllable, so that the treatment liquid from the collection tank 23 can also pass bypassing the pre-filter 56 and the filter 57 before the continuous washing machine 45.

Im Folgenden wird das erfindungsgemäße Verfahren anhand der Durchlaufwaschmaschine 45 und der dieser nachgeordneten Entwässerungspresse 46 näher beschrieben:

  • Die Vorfilter 51 und 56 sowie die zur Präzisionsfilterung dienenden Filter 52 und 57 haben die gleiche Funktion wie die Vorfilter 25 und 31 und Filter 26 und 32 beim weiter oben im Zusammenhang mit der in Fig. 1 beschriebenen Verfahren. Demnach dienen die Vorfilter 51 und 56 dazu, aus der Behandlungsflüssigkeit größere Partikel abzutrennen, bevor von den Filtern 52 und 57 aus der Behandlungsflüssigkeit mindestens größtenteils die kleineren verbrauchten waschaktiven Substanzen, aber nicht die noch kleineren unverbrauchten waschaktiven Substanzen, abgetrennt werden.
The method according to the invention will be described in more detail below with reference to the continuous washing machine 45 and the downstream dewatering press 46:
  • The prefilters 51 and 56 and the precision filtering filters 52 and 57 have the same function as the prefilters 25 and 31 and filters 26 and 32 in the above with reference to Figs Fig. 1 described method. Accordingly, the pre-filters 51 and 56 serve to separate larger particles from the treatment liquid, before at least for the most part the smaller spent washing-active substances, but not the still smaller unused washing-active substances, are separated from the filters 52 and 57.

Die vom Vorfilter 51 und vom Filter 52 aufbereitete Flüssigkeit aus dem Ende der Vorwaschzone 17 gelangt über die Rücklaufleitung 54 zum Einlauftrichter 29 vor der Durchlaufwaschmaschine 45. Diese im Wesentlichen nur noch unverbrauchte waschaktive Substanzen enthaltende Behandlungsflüssigkeit wird verwendet zum Einschwemmen von Wäschestücken, die in einem nächsten Waschzyklus behandelt werden sollen.The prepared from the pre-filter 51 and the filter 52 liquid from the end of the prewashing zone 17 passes through the return line 54 to the inlet hopper 29 before the continuous washing machine 45. This substantially only unused washing-active substances containing treatment liquid is used to leach laundry, in a next Wash cycle to be treated.

Aus der Klarwaschzone 48 der Durchlaufwaschmaschine 45 gelangen die gewaschenen Wäschestücke in die Entwässerungspresse 46 hinter der Durchlaufwaschmaschine 45 oder eine andere Entwässerungseinrichtung. Von der Entwässerungspresse 46 wird zunächst die Behandlungsflüssigkeit aus der Klarwaschzone 48 von den Wäschestücken bis auf die Restfeuchte getrennt. Die Behandlungsflüssigkeit aus der Klarwaschzone 48, die verbrauchte und unverbrauchte waschaktive Substanzen enthält, wird im Sammeltank 23 unter der Entwässerungspresse 46 aufgefangen und von diesem durch die Ablaufleitung 55 zunächst zum Vorfilter 56 geleitet, von diesem vorgefiltert durch Abtrennung größerer Partikel und anschließend dem Filter 57 zugeführt, der mindestens größtenteils verbrauchte waschaktive Substanzen aus der Behandlungsflüssigkeit entfernt. Danach wird ein Teil der aufbereiteten Behandlungsflüssigkeit ohne nennenswerte verbrauchte waschaktive Substanzen über die Verbindungsleitung 58 und die Abzweigstelle 59 der Rücklaufleitung 54 zum Einlauftrichter 29 geleitet. Dabei wird die aus der Vorwaschzone 47 stammende, aufbereitete Behandlungsflüssigkeit um einen solchen Anteil aufgefüllt, der bei der Vorfilterung im Vorfilter 51 und im Filter 52 aus der Behandlungsflüssigkeit von der Vorwaschzone 47 entfernt worden ist. Der restliche Teil der von der Entwässerungspresse 46 aus den Wäschestücken abgetrennten Behandlungsflüssigkeit aus der Klarwaschzone 48 im Sammeltank 23 wird hinter dem Filter 57 durch die Ablaufleitung 60 zum Anfang der Klarwaschzone 48 geleitet.From the final wash zone 48 of the continuous washing machine 45, the washed laundry items reach the dewatering press 46 behind the continuous washing machine 45 or another dewatering device. From the dewatering press 46, the treatment liquid from the final wash zone 48 is first separated from the laundry items to the residual moisture. The treatment liquid from the final wash zone 48, which contains used and unconsumed wash-active substances, is collected in the collection tank 23 under the dewatering press 46 and passed from the latter through the discharge line 55 first to the pre-filter 56, prefiltered by this by separating larger particles and then fed to the filter 57 which at least for the most part removes used washing-active substances from the treatment liquid. Thereafter, a portion of the treated treatment liquid is passed through the connecting line 58 and the branch point 59 of the return line 54 to the inlet funnel 29 without significant wasted active substances. In this case, the treated treatment liquid originating from the prewash zone 47 is filled up by such a proportion, which has been removed from the prewash zone 47 during the prefiltration in the prefilter 51 and in the filter 52 from the treatment liquid. The remaining part of the treatment liquid separated from the laundry items by the dewatering press 46 from the final wash zone 48 in the collection tank 23 is passed behind the filter 57 through the drain line 60 to the beginning of the final wash zone 48.

Nachdem die Entwässerungspresse 46 die Behandlungsflüssigkeit aus der Klarwaschzone 48 aus den Wäschestücken bis auf die Restfeuchte abgetrennt hat und diese Behandlungsflüssigkeit aus dem Sammeltank 23 entfernt und durch den Vorfilter 56 sowie den Filter 57 aufbereitet worden ist, erfolgt in der Entwässerungspresse 46 das Spülen der Wäschestücke. Dazu wird über die Zufuhrleitung 49 Frischwasser der Entwässerungspresse 46 zugeführt, das von der Entwässerungspresse durch die Wäschestücke gepresst wird, wobei ein Spülen der Wäschestücke stattfindet. Die aus den Wäschestücken beim Spülen ausgepresste Spülflüssigkeit wird nun im Sammeltank 23 aufgefangen und über die Verbindungsleitung 61 ohne eine Filtration über die Abzweigstellen 53 und 59 durch die Rücklaufleitung 54 zum Einlauftrichter 29 vor der Durchlaufwaschmaschine 45 geleitet.After the dewatering press 46 has separated the treatment liquid from the final wash zone 48 from the laundry items to the residual moisture and this treatment liquid has been removed from the collection tank 23 and processed through the pre-filter 56 and the filter 57, the laundry is rinsed in the dewatering press 46. For this purpose, fresh water is supplied to the dewatering press 46 via the supply line 49, which is pressed by the dewatering press through the laundry items, wherein a rinsing of the laundry takes place. The rinsing liquid pressed out of the laundry items during rinsing is now collected in the collecting tank 23 and conducted via the connecting line 61 without filtration via the branching points 53 and 59 through the return line 54 to the inlet funnel 29 in front of the continuous washing machine 45.

Es kann bevorzugt in der Ablaufleitung 55 mindestens ein weiterer Sammeltank angeordnet sein, in dem Behandlungsflüssigkeit aus der Klarwaschzone 48 zwischengespeichert wird, bis diese vom Vorfilter 56 und dem Filter 57 gefiltert und einer weiteren Verwendung zugeführt wird. Dadurch kann der Sammeltank 23 sofort nach dem Trennen der Behandlungsflüssigkeit aus der Klarwaschzone 48 von den Wäschestücken entleert werden, so dass der Sammeltank 23 kurzfristig zur Aufnahme von Spülflüssigkeit zur Verfügung steht.At least one further collection tank may be arranged in the discharge line 55, in which treatment liquid from the final wash zone 48 is temporarily stored until it is filtered by the prefilter 56 and the filter 57 and sent for further use. As a result, the collection tank 23 can be emptied of the laundry items immediately after the separation of the treatment liquid from the final wash zone 48, so that the collection tank 23 is available for receiving rinsing liquid at short notice.

Das erfindungsgemäße Verfahren eignet sich besondere für die Vorrichtung der Fig. 2, bei der die Durchlaufwaschmaschine 45 nur eine Vorwaschzone 47 und eine Klarwaschzone 48 aufweist, aber das Spülen der Wäschestücke in der Entwässerungspresse 46 stattfindet. Hier fällt Behandlungsflüssigkeit aus der Klarwaschzone 48 und Spülflüssigkeit aus der Entwässerungspresse 46 kurz aufeinanderfolgend an, so dass aufbereitete Behandlungsflüssigkeit mit nur noch unverbrauchten waschaktiven Substanzen über die Spülflüssigkeit zum passenden Zeitpunkt für einen Waschvorgang eines folgenden Postens an Wäschestücken zur Verfügung steht. Dadurch wird der Frischwasserbedarf bei der Vorrichtung der Fig. 2 auf ein Minimum reduziert. In machen Fällen ist überhaupt kein Frischwasser zuführbar, weil die von der Restfeuchte mit den fertig gespülten und entwässerten Wäschestücken ausgetragene Flüssigkeit und die an den Vorfiltern 51 und 56 sowie den Filtern 52 und 57 mit Reststoffpartikeln und verbrauchten waschaktiven Substanzen abgetrennte Flüssigkeit durch das zum Spülen der Wäschestücke der Entwässerungspresse 46 über die Zufuhrleitung 49 zugeführte Frischwasser verwendbar ist, um die ausgetragene bzw. abgefilterte Behandlungsflüssigkeit wieder zu ergänzen zur Behandlung des nachfolgenden Postens an Wäschestücken in der Vorrichtung.The inventive method is particularly suitable for the device of Fig. 2 in that the continuous washing machine 45 has only one pre-wash zone 47 and one final wash zone 48, but the washing of the laundry items takes place in the dewatering press 46. In this case, treatment liquid from the final wash zone 48 and rinse liquid from the dewatering press 46 falls in rapid succession, so that treated treatment liquid containing only unused washing-active substances via the rinse liquid is available at the appropriate time for a washing operation of a following item of laundry items. As a result, the fresh water requirement in the device of Fig. 2 reduced to a minimum. In some cases, no fresh water can be supplied at all, because the liquid discharged from the residual moisture with the completely rinsed and dehydrated items of laundry and at the pre-filters 51 and 56 as well as the filters 52 and 57 with residual material particles and spent washing-active substances separated liquid by the flushing of the laundry items of the dewatering press 46 via the supply line 49 supplied fresh water is used to replenish the discharged or filtered treatment liquid for the treatment of the subsequent item of laundry in the device.

Auch bei der Vorrichtung der Fig. 2 lässt sich das Verfahren der während des Waschprozesses erfolgenden Messung der Konzentration unverbrauchter waschaktiver Substanzen in der Behandlungsflüssigkeit einsetzen. Bei diesem Verfahren wird prinzipiell in gleicher Weise, wie es im Zusammenhang mit der Vorrichtung der Fig. 1 beschrieben worden ist, nach dem Abtrennen der verbrauchten waschaktiven Substanzen von der Behandlungsflüssigkeit kontinuierlich (in situ) die Konzentration der verbrauchten waschaktiven Substanzen in der Behandlungsflüssigkeit hinter den Filtern 52 und/oder 57 ermitteln und geregelt in Abhängigkeit von einer Sollkonzentration der waschaktiven Substanzen eine entsprechende Menge neuer waschaktiver Substanzen der Behandlungsflüssigkeit hinzugeben. Die Messung der Konzentration unverbrauchter wäschaktiver Substanzen in der Waschflüssigkeit erfolgt durch Messsensoren bzw. Messsonden, die weiter oben im Zusammenhang mit dem Ausführungsbeispiel der Fig. 1 genannt worden sind.Also in the device of Fig. 2 For example, it is possible to use the method of measuring the concentration of unused washing-active substances in the treatment liquid during the washing process. In principle, this method is used in the same way as in connection with the device of Fig. 1 has been described, after separating the spent washing-active substances from the treatment liquid continuously (in situ) determine the concentration of the spent washing-active substances in the treatment liquid behind the filters 52 and / or 57 and regulated in dependence on a desired concentration of the washing-active substances a corresponding amount Add new washing-active substances to the treatment liquid. The measurement of the concentration of unused laundry-active substances in the washing liquid is carried out by measuring sensors or measuring probes, which are described above in connection with the exemplary embodiment of FIG Fig. 1 have been called.

Claims (7)

  1. Method for the washing of laundry articles, wherein after the washing of the laundry articles the treatment liquid is at least partially separated from the treated laundry articles and, by means of precision filtration, spent wash-active substances are removed at least for the most part from the treatment liquid separated from the laundry articles, characterized in that the laundry articles are washed in a treatment liquid containing at least one wash-active substance in a continuous-flow washing machine (10) having a plurality of successive chambers (16) with at least one pre-washing zone and a clear-washing zone, spent wash-active substances are removed from the treatment liquid after various treatment steps, and the treatment liquid freed of the spent active substances is supplied as required to the laundry articles before the pre-wash and/or before the clear wash, after a least one spent wash-active substance has been removed at least for the most part from the treatment fluid the content of the at least one wash-active substance still present in the treatment liquid is determined during the treatment, the measured content of the at least one wash-active substance still present in the treatment liquid is compared with a desired content of at least one wash-active substance in the treatment liquid and, if the desired content is undershot, a corresponding quantity of at least one wash-active substance is added to the treatment liquid before the latter is reused.
  2. Method according to Claim 1, characterized in that the or each spent wash-active substance is removed at least for the most part from the treatment liquid after at least one pre-wash, preferably also after the clear wash.
  3. Method according to Claim 1 or 2, characterized in that the at least one spent wash-active substance is removed at least for the most part from the treatment liquid a plurality of times.
  4. Method according to one of the previous Claims, characterized in that, during a rinsing of the washed laundry articles in a drainage device, at least one spent wash-active substance is removed at least for the most part from the treatment liquid separated from the laundry articles after washing and also from the treatment liquid separated from the laundry articles before rinsing in the drainage device.
  5. Method according to one of the previous Claims, characterized in that pre-filtration is carried out before at least one spent wash-active substance is filtered out of the treatment liquid.
  6. Method according to Claim 1 or 5, characterized in that the filtering-out of at least a large part of at least one spent wash-active substance from the treatment liquid takes place by means of micro- and/or ultra-filtration.
  7. Method according to one of the previous Claims, characterized in that, during filtration, in particular during micro- and/or ultra-filtration, spent wash-active substances with a particle size of 0.005 µm to 10 µm, preferably 0.5 µm to 1 µm, are removed at least for the most part from the treatment liquid.
EP08007286.1A 2007-04-20 2008-04-14 Method for wet treating articles of laundry Active EP1983087B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL08007286T PL1983087T3 (en) 2007-04-20 2008-04-14 Method for wet treating articles of laundry
EP10007887A EP2246468A1 (en) 2007-04-20 2008-04-14 Method for wet treating articles of laundry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007019193A DE102007019193A1 (en) 2007-04-20 2007-04-20 Method and device for the wet treatment of laundry items

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP10007887A Division-Into EP2246468A1 (en) 2007-04-20 2008-04-14 Method for wet treating articles of laundry

Publications (3)

Publication Number Publication Date
EP1983087A2 EP1983087A2 (en) 2008-10-22
EP1983087A3 EP1983087A3 (en) 2009-01-14
EP1983087B1 true EP1983087B1 (en) 2016-09-28

Family

ID=39673400

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10007887A Withdrawn EP2246468A1 (en) 2007-04-20 2008-04-14 Method for wet treating articles of laundry
EP08007286.1A Active EP1983087B1 (en) 2007-04-20 2008-04-14 Method for wet treating articles of laundry

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10007887A Withdrawn EP2246468A1 (en) 2007-04-20 2008-04-14 Method for wet treating articles of laundry

Country Status (6)

Country Link
US (1) US20090100607A1 (en)
EP (2) EP2246468A1 (en)
DE (1) DE102007019193A1 (en)
DK (1) DK1983087T3 (en)
ES (1) ES2606314T3 (en)
PL (1) PL1983087T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007023801A1 (en) * 2007-05-21 2008-11-27 Herbert Kannegiesser Gmbh Process for the wet treatment of laundry items
DE102009025158A1 (en) * 2009-06-12 2010-12-16 Herbert Kannegiesser Gmbh Method for determining cleaning-active substances in a treatment liquid
DE102011015188A1 (en) * 2010-03-29 2011-09-29 Herbert Kannegiesser Gmbh Process for wet treatment, in particular for cleaning, articles
JP6015908B2 (en) * 2012-07-25 2016-10-26 アークロマ・インテレクチュアル・プロパティ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Washing method
US20150167221A1 (en) * 2013-12-17 2015-06-18 Pellerin Milnor Corporation Floor mat and particulate laden material washing apparatus and method
EP3094776A4 (en) * 2014-01-17 2017-11-29 ColorZen LLC Method and apparatus for pre-treatment of non-continuous textiles
DE102022104426A1 (en) 2022-02-24 2023-08-24 Mewa Textil-Service Ag & Co. Management Ohg Device and method for the wet treatment of laundry

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041594C2 (en) * 1980-11-04 1985-08-29 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Washing machine with a filter device
DD223697A1 (en) * 1984-05-29 1985-06-19 Inst Kommunalwirtschaft DEVICE FOR TREATING WAISTING WATER
DE3902386C2 (en) * 1989-01-27 1998-11-12 Seco Maschinenfabrik Gmbh Device for washing textiles
DE19609994C1 (en) * 1996-03-14 1997-09-18 Henkel Ecolab Gmbh & Co Ohg Process for operating counter-current car washes and counter-current washing systems
DE19709085C2 (en) * 1996-05-15 2002-05-08 Miele & Cie Method of washing laundry using a filtration method
DE19630089C1 (en) * 1996-07-26 1997-10-16 Brochier Wasser Und Abwasserte Process and assembly treats waste water and tensides separately by nano-filtration
DE19645664C2 (en) * 1996-11-06 1998-09-03 Henkel Ecolab Gmbh & Co Ohg Process for operating counter-current car washes and counter-current washing system
DE19654619A1 (en) * 1996-12-20 1998-06-25 Hochtemperatur Materialien Und Washing machine water recycling
DE29707168U1 (en) * 1997-04-11 1997-06-12 Ingbuero H Hoerich Umwelttechn Facility for recycling washing water from laundries
ATE267286T1 (en) * 1999-06-22 2004-06-15 Miele & Cie METHOD FOR DETERMINING THE CONCENTRATION OF A DETERGENT, METHOD FOR DOSING DETERGENT AND WASHING MACHINE FOR PERFORMING SUCH METHOD
US7000437B2 (en) * 2001-01-18 2006-02-21 Shell Oil Company System and method for economically viable and environmentally friendly central processing of home laundry
US20030213069A1 (en) * 2002-05-20 2003-11-20 Tortorici Paul Lee System and method of surfactant dosing
DE10347766A1 (en) * 2003-10-14 2005-06-09 BSH Bosch und Siemens Hausgeräte GmbH Household machine with a system for supplying detergent into the cleaning liquid
FR2873912B1 (en) * 2004-08-03 2008-03-21 Brandt Ind Sas PROCESS FOR REUSING A WASHING OR RINSING LIQUID IN A WASHING MACHINE, WASHING MACHINE AND FILTERING SYSTEM THEREFOR
EP1848851B1 (en) * 2005-02-11 2009-08-05 Herbert Kannegiesser GmbH Method and device for wet treating laundry items

Also Published As

Publication number Publication date
DK1983087T3 (en) 2017-01-23
DE102007019193A1 (en) 2008-10-23
US20090100607A1 (en) 2009-04-23
ES2606314T3 (en) 2017-03-23
EP1983087A3 (en) 2009-01-14
PL1983087T3 (en) 2017-04-28
EP1983087A2 (en) 2008-10-22
EP2246468A1 (en) 2010-11-03

Similar Documents

Publication Publication Date Title
EP1983087B1 (en) Method for wet treating articles of laundry
EP2552611B1 (en) Method for wet-treating, in particular cleaning, objects
DE4012022C1 (en)
EP1743871A1 (en) Waste water treatment in automatic multi-tank cleaning devices
DE102019203809B3 (en) Water-bearing household appliance and method for its operation
DE2910140A1 (en) Washing machine water consumption reduction - by storing rinsing water for next washing cycle
EP1637059B1 (en) Dishwashing installation
DE10039904A1 (en) Process for washing laundry in a tank-less car wash and car wash for carrying out the process
EP1236823A2 (en) Method for wet treatment of laundry
EP1995364B1 (en) Method for wet treating articles of laundry
EP2500459B1 (en) Method and device for washing, in particular laundry items
DE4038305C1 (en) Treating waste water from vehicle washing plant - in which water is collected from each washing zone and supplied to at least two=stage treatment plant
DE2159811A1 (en) METHOD FOR WATER TREATMENT AND DEVICE FOR ITS IMPLEMENTATION
EP1989349B1 (en) Method and device for the wet treatment of laundry
DE10031040B4 (en) Method and device for wet treatment of laundry items
DE2653479A1 (en) METHOD AND DEVICE FOR MACHINE WASHING AND CLEANING OF SOLID MATERIALS USING LOW PHOSPHATE OR PHOSPHATE-FREE DETERGENTS AND CLEANING AGENTS
DE10031038B4 (en) A method for separating contaminants from a liquid for washing laundry in a continuous washing machine
EP3216907A1 (en) Method for wet treating laundry
DE3142217C1 (en) Method and device for processing water in car washes
DE102016004207A1 (en) Process for the wet treatment of laundry
DE3903343C2 (en) Process for wastewater treatment using ion exchange resins
DE102010050489A1 (en) Method for wet treatment, particularly for washing of laundry items, involves treating laundry items in multiple treatment chambers of rotatably driven drum in treatment direction
WO2003025265A1 (en) Device for continuous washing of soiled wool containing grease
AT219545B (en) Dry cleaning system
DE19614674C2 (en) Procedures to minimize water consumption

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

17P Request for examination filed

Effective date: 20090710

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20090923

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160425

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 832852

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161015

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502008014650

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

Effective date: 20170116

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161228

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161229

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170128

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161228

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170130

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502008014650

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20170629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170414

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20080414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160928

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160928

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20200420

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20200326

Year of fee payment: 13

Ref country code: PL

Payment date: 20200401

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20200325

Year of fee payment: 13

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 832852

Country of ref document: AT

Kind code of ref document: T

Effective date: 20210414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210414

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210430

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20220506

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210414

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230328

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200414

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230323

Year of fee payment: 16

Ref country code: BE

Payment date: 20230324

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20230324

Year of fee payment: 16

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230529

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20230414

Year of fee payment: 16

Ref country code: DE

Payment date: 20230526

Year of fee payment: 16

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20240529