EP0560025B1 - Procédé de nettoyage de la vaisselle dans les machines à laver avec plusieurs étapes - Google Patents

Procédé de nettoyage de la vaisselle dans les machines à laver avec plusieurs étapes Download PDF

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Publication number
EP0560025B1
EP0560025B1 EP93100973A EP93100973A EP0560025B1 EP 0560025 B1 EP0560025 B1 EP 0560025B1 EP 93100973 A EP93100973 A EP 93100973A EP 93100973 A EP93100973 A EP 93100973A EP 0560025 B1 EP0560025 B1 EP 0560025B1
Authority
EP
European Patent Office
Prior art keywords
stage
procedure according
waste water
prewash
gravity separation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93100973A
Other languages
German (de)
English (en)
Other versions
EP0560025A1 (fr
Inventor
Ulrich Dipl.-Ing. Bachon
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.)
Aqseptence Group GmbH
Original Assignee
Passavant Werke AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Passavant Werke AG and Co KG filed Critical Passavant Werke AG and Co KG
Publication of EP0560025A1 publication Critical patent/EP0560025A1/fr
Application granted granted Critical
Publication of EP0560025B1 publication Critical patent/EP0560025B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/24—Washing or rinsing machines for crockery or tableware with movement of the crockery baskets by conveyors
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/02—Pressurised cleaning liquid delivered by a pump

Definitions

  • the invention relates to a new method for cleaning dishes in the known multi-stage washing systems.
  • These dishwashers contain at least one pre-wash stage ("pre-clearing zone”), a main wash stage and a final rinse stage.
  • the rinse water is circulated in the individual rinse stages by means of pumps. Fresh water mixed with rinse aid is used in the rinse aid stage.
  • the fresh water which is reduced by the carry-away losses of the dishes, passes through the washing system in countercurrent to the transportation of the dishes. It is collected under the pre-rinse stage and freed of contaminants that influence the discharge conditions mechanically (light liquid separator with sludge trap) or physico-chemically (emulsion splitting system).
  • the wastewater treatment system is usually installed far away from the flushing system and is therefore often neglected. If the disposal intervals are much too long, the waste that is then disposed of can only be disposed of as special waste because it has decomposed into non-recyclable substances through acidic fermentation.
  • the task of shortening the disposal intervals is achieved in another known dishwasher system (CH-A-262228) in that the wastewater obtained in the pre-rinse stage is mechanically cleaned in an integrated cleaning system designed as a filter and then fed back to the pre-rinse stage as rinse water .
  • the arrangement of the rinsing water cleaning system in the dishwasher opens up the possibility of disposing of the separated wastewater ingredients in a fresh and thus recyclable state at short intervals.
  • the mechanical cleaning system designed as a filter cannot be handled in a practical manner.
  • the filters clog quickly and therefore have to be removed very frequently for cleaning. This cleaning is unsanitary and is therefore often neglected or postponed for an unacceptably long time.
  • liquid edible fats and oils are not retained by the filter and enter the sewage system with the filtrate.
  • the object of avoiding these disadvantages and malfunctions of this known cleaning system is, based on a mechanical wastewater treatment stage integrated in the dishwasher, achieved according to the invention in that the mechanical wastewater treatment stage is designed as a gravity separation stage.
  • Separators of this type are known as cleaning devices for waste water contaminated with light substances.
  • their use as an integrated cleaning stage for the waste water occurring in the pre-rinsing stage of a dishwasher, which may contain sinking and floating substances is not known.
  • the use of such an integrated cleaning stage has the advantages that all of the ingredients contained in the waste water are now retained and there is a hygienic removal option. Since the separation stage is located inside the dishwasher, the ingredients (which are considered to be valuable) are disposed of regularly. The collected ingredients can now be brought fresh for reprocessing.
  • a gravity separator that works without air access is preferably used. If, according to the invention, the ingredients separated off there are transferred to collection containers which also do not contain any air volume, the ingredients can be brought to recycling in the fresh state.
  • the wastewater is also chemically cleaned, e.g. B. the ingredients present in emulsified form are separated, then this purified water can be reused in the rinse zone and can thus be recycled. This drastically reduces fresh water consumption.
  • the wastewater cleaned in this way also fulfills the discharge conditions and can be discharged into the sewage system.
  • the solid contaminants are usually retained by a coarse sieve. This sieve must be cleaned at regular intervals.
  • the screened solid contaminants in a s. G. To shred wet shredder and to transport it to press dewatering with the unpurified wastewater taken from the pre-rinse stage.
  • the press water from press dewatering is cleaned in the plant's own cleaning system and then recycled to the pre-rinse stage.
  • the wet shredder can even be used for solid contaminants that occur in other areas of the kitchen or canteen, which are thus also fed into a controlled recycling process.
  • the press-dewatered contaminants are stacked in the collection container until they are disposed of.
  • Waste water with separable contents occurring at other points can also be treated in the separator system of the dishwasher and the cleaned waste water can also be used in the dishwasher system. This results in a second use of these waters.
  • the collecting container can finally used cooking oils and fats, such as. B. fryer fat, are supplied so that their disposal and return is secured for recycling.

Landscapes

  • Physical Water Treatments (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (13)

  1. Procédé destiné à laver la vaisselle dans un lave-vaiselle à plusieurs étapes comprenant une étape de rinçage à l'eau fraîche, et dans laquelle l'eau de lavage s'écoule contre la direction de transport de la vaiselle jusqu'à l'étape de prérinçage, selon lequel l'eau usée de l'étape de prérinçage est purifiée mécaniquement dans une étape de traitement intégrée et est récirculée ensuite comme eau de lavage dans l'étape de prérinçage, caractérisé en ce que l'étape de traitement mécanique de l'eau usée est réalisée comme étape de séparation à gravité.
  2. Procédé selon revendication 1, caractérisé en ce que l'étape de séparation à gravité est pourvue d'une possibilité de prélèvement des matières suspendues et/ou sédimentées qui se sont accumulées.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que l'eau usée provenant de l'étape de séparation à gravité est également purifiée chimiquement et, finalement, récirculée comme eau de lavage dans l'étape de rinçage.
  4. Procédé selon revendication 1, caractérisé en ce que les eaux usées des zones de lavage principal et de rinçage sont recueillies séparément et déchargées dans la canalisation, et que l'eau usée de l'étape de prérinçage est également recueillie séparément, purifiée et ensuite récirculée dans l'étape de prérinçage.
  5. Procédé selon les revendications 1 à 4, caractérisé en ce que l'eau usée qui a été purifiée mais pas récirculée est déchargée dans la canalisation.
  6. Procédé selon les revendications 1 à 5, caractérisé en ce que le traitement dans l'étape de séparation à gravité se déroule à l'abri de l'air.
  7. Procédé selon revendication 6, caractérisé en ce que les matières solides accumulées dans l'étape de séparation à gravité sont évacuées à intervalles de temps courts et déposées dans un silo.
  8. Procédé selon revendication 7, caractérisé en ce que les silos sont également hermétiquement clos.
  9. Procédé selon les revendications 1 à 8, caractérisé en ce que les matières polluantes solides sont séparées par tamisage dans l'étape de prérinçage et ensuite broyées.
  10. Procédé selon revendication 9, caractérisé en ce que les matières solides broyées sont alimentées avec l'eau usée brute, sortie de l'étape de prérinçage, à un dessèchement par compression et que l'eau s'accumulant durant le dessèchement par compression est purifiée et ensuite récirculée dans l'étape de prérinçage.
  11. Procédé selon revendication 10, caractérisé en ce que le broyeur est alimenté des déchêts d'autres origines.
  12. Procédé selon revendication 7, caractérisé en ce que les eaux usées provenant d'autres origines sont purifiées également dans l'étape de traitement d'eau intégrée du lave-vaisselle.
  13. Procédé selon revendication 6, caractérisé en ce que les eaux usées provenant d'autres origines sont également traitées dans l'étape de séparation à gravité et que les matières séparées sont évacuées à intervalles de temps courts et déposées dans un silo.
EP93100973A 1992-03-13 1993-01-22 Procédé de nettoyage de la vaisselle dans les machines à laver avec plusieurs étapes Expired - Lifetime EP0560025B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4208030A DE4208030A1 (de) 1992-03-13 1992-03-13 Verfahren zum reinigen von geschirr in mehrstufigen spuelmaschinen
DE4208030 1992-03-13

Publications (2)

Publication Number Publication Date
EP0560025A1 EP0560025A1 (fr) 1993-09-15
EP0560025B1 true EP0560025B1 (fr) 1996-12-27

Family

ID=6453981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100973A Expired - Lifetime EP0560025B1 (fr) 1992-03-13 1993-01-22 Procédé de nettoyage de la vaisselle dans les machines à laver avec plusieurs étapes

Country Status (3)

Country Link
EP (1) EP0560025B1 (fr)
AT (1) ATE146662T1 (fr)
DE (2) DE4208030A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8157923B1 (en) 2010-11-08 2012-04-17 Whirlpool Corporation Method of reusing wash and rinse liquid in a dishwasher
US8968483B2 (en) 2012-09-10 2015-03-03 Whirlpool Corporation Method of using liquid in a dishwasher
US9186034B2 (en) 2012-09-05 2015-11-17 Whirlpool Corporation Methods of reusing liquid in a dishwasher

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE502005005404D1 (de) † 2005-07-14 2008-10-30 Meiko Maschinenbau Gmbh & Co Prozesswasseraufbereitung in Mehrtankreinigungsautomaten
DE102005039140A1 (de) * 2005-08-18 2007-02-22 Premark Feg L.L.C., Wilmington Transport-Geschirrspülmaschine
DE102005039385A1 (de) * 2005-08-20 2007-02-22 Premark Feg L.L.C., Wilmington Transport-Geschirrspülmaschine
DE102008005876B3 (de) 2008-01-24 2009-04-30 Meiko Maschinenbau Gmbh & Co.Kg Verfahren zur Selbstreinigung einer Durchlaufspülmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH262228A (de) * 1948-02-13 1949-06-30 Weiland Carl Verfahren zum Waschen und Trocknen von Geschirr, Besteck, Gläsern, Dosen, Schokoladeformen und dergleichen sowie Vorrichtung zur Durchführung des Verfahrens.
US3144872A (en) * 1963-08-16 1964-08-18 Detrex Chem Ind Trough-type solvent washer
DE1956050C3 (de) * 1969-11-07 1978-06-01 Meiko Maschinen- Und Apparatebau, Ingenieur Oskar Meier Gmbh & Co, 7600 Offenburg Vorabräumeinrichtung für Speiseplatten
US3683944A (en) * 1971-01-25 1972-08-15 Sybron Corp Control apparatus for washer-sterilizer
US4228813A (en) * 1979-04-02 1980-10-21 Noren Tore H Low temperature conveyor, rack-type dishwasher
DE4100164C1 (fr) * 1991-01-05 1992-04-30 Deutsche Lufthansa Ag, 5000 Koeln, De

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8157923B1 (en) 2010-11-08 2012-04-17 Whirlpool Corporation Method of reusing wash and rinse liquid in a dishwasher
US9186034B2 (en) 2012-09-05 2015-11-17 Whirlpool Corporation Methods of reusing liquid in a dishwasher
US8968483B2 (en) 2012-09-10 2015-03-03 Whirlpool Corporation Method of using liquid in a dishwasher

Also Published As

Publication number Publication date
EP0560025A1 (fr) 1993-09-15
DE59304846D1 (de) 1997-02-06
ATE146662T1 (de) 1997-01-15
DE4208030A1 (de) 1993-09-16

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