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EP1481740A2 - Procédé et dispositif pour nettoyer des objets par voie humide - Google Patents

Procédé et dispositif pour nettoyer des objets par voie humide Download PDF

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Publication number
EP1481740A2
EP1481740A2 EP04011770A EP04011770A EP1481740A2 EP 1481740 A2 EP1481740 A2 EP 1481740A2 EP 04011770 A EP04011770 A EP 04011770A EP 04011770 A EP04011770 A EP 04011770A EP 1481740 A2 EP1481740 A2 EP 1481740A2
Authority
EP
European Patent Office
Prior art keywords
cleaning
liquid
rinsing
container
liquid container
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.)
Withdrawn
Application number
EP04011770A
Other languages
German (de)
English (en)
Other versions
EP1481740A3 (fr
Inventor
Oskar K. Dr. Wack
Joachim Dr. Becht
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.)
Drok Wack Chemie GmbH
Original Assignee
Drok Wack Chemie GmbH
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 Drok Wack Chemie GmbH filed Critical Drok Wack Chemie GmbH
Publication of EP1481740A2 publication Critical patent/EP1481740A2/fr
Publication of EP1481740A3 publication Critical patent/EP1481740A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • C11D7/5022—Organic solvents containing oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/14—Removing waste, e.g. labels, from cleaning liquid
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5031—Azeotropic mixtures of non-halogenated solvents

Definitions

  • the invention relates to a method for liquid cleaning of objects according to the preamble of claim 1.
  • the invention further relates to a device for Performing the procedure.
  • a liquid cleaning method is known from WO 96/28535, in which the cleaning objects are first brought into contact with a cleaning liquid between 0.01 and 80% by weight of water and between 99.99 and 20 % By weight of an organic solvent containing an azeotrope with the water forms and forms a separate phase after azeotropic distillation. Subsequently the cleaned objects are brought into contact with a rinsing liquid, which between 99.99 - 60 wt% water and between 0.01 and 40 wt% of the contains the same organic solvent, the water content of the rinsing liquid is larger than that of the cleaning liquid.
  • Cleaning liquid used with at least part of the cleaning rinsing liquid used for rinsing and the mixed cleaning and rinsing liquid is subjected to azeotropic distillation.
  • the Distillate separates into a water-rich phase and a solvent-rich phase.
  • At least part of the solvent-rich phase becomes the cleaning liquid supplied and at least a part of the water-rich phase is the rinsing liquid fed.
  • the method described is both in its implementation and relatively expensive in terms of the necessary device, since the composition the solvent-rich cleaning liquid and the low-solvent or water-rich rinsing liquid, which are at least partially separated from one another Circulations are carried out, must be checked separately. Furthermore becomes a relatively high solvent concentration for the cleaning liquid needed, which leads to increased costs.
  • a cleaning device in which the cleaning liquid a storage container, a cleaning container or a cleaning device is supplied in which the cleaning of an object takes place. From the cleaning device the cleaning liquid is drawn off through a filter and fed to a separation chamber upstream of the storage tank. For Steam cleaning will clean the cleaning liquid from the storage container Evaporator supplied, from which the steam reaches the cleaning device. The Steam condensing in the cleaning device passes through the filter of the separation chamber fed from where the liquid reaches the storage tank. During the period when there is no steam cleaning, the liquid can from the storage tank through the evaporator and the condenser are fed to the separating chamber and thereby processed.
  • a quirk the known device is that the liquid cleaning and optionally flushing from the same storage tank in the same circuit and that the liquid used for cleaning or rinsing immediately is performed in a circuit that the filter device and the separation chamber contains.
  • US 2003/0040456 A1 describes a method in which objects in a first container can be pre-cleaned with a first cleaning liquid.
  • the pre-cleaned items then come into a second container in which they are stored another cleaning liquid, possibly under the influence of ultrasound, be cleaned.
  • the liquid used for post-cleaning is pumped through a separator.
  • the invention has for its object a cleaning method and a device to carry it out, the simple with high cleaning effect and is inexpensive to carry out.
  • three different liquid circuits are provided that the circulation of the liquid used for cleaning or the respective liquid used for rinsing completely independent of the circulation of the liquid in the third cycle, in which the pollution contained in the liquid is removed can be chosen. Furthermore stands with the invention Process constantly high purity rinsing liquid immediately available, so without Loss of time between cleaning and rinsing can be switched.
  • the fluid circulation speeds can be chosen independently wherein the throughput capacity of the pollution removal device is smaller can be, for example, the throughput of the cleaning circuit or Rinse cycle.
  • the claim 2 is directed to a particularly advantageous liquid.
  • Claim 5 is advantageous in the pollution removal device included settling directed, according to claim 6, a part of the in the settling device cleaned liquid immediately the cleaning liquid container can be fed again.
  • Claims 8 to 10 characterize advantageous cleaning-active liquids.
  • Claims 12 to 14 characterize advantageous embodiments of the invention Contraption.
  • a cleaning chamber 10 is provided in the one to be cleaned Objects 12 intensively with liquid by means of a spray device 14 are sprayable.
  • the objects 12 can be sprayed by means of suitable devices are rotated or otherwise pivoted.
  • the cleaning chamber 10 can be designed such that the objects are complete Immerse it in the liquid and, for example, irradiate it with ultrasound become.
  • the cleaning chamber 10 can be any suitable Have a structure that ensures that objects to be cleaned are intensive come into contact with liquid and then the liquid properly from the objects to be cleaned.
  • a cleaning liquid container 16 is also provided, in which cleaning liquid 18 is included.
  • a line 20 leads from the cleaning liquid container 16 via a first valve, a cleaning pump 22, a further valve and a flow meter 23 to a three-way valve 24, from which a feed line 26 into the Cleaning chamber 10 leads.
  • a drain 28 leads from the cleaning chamber 10 via a further three-way valve 30 to a line 32 through a filter 34 with a fineness of, for example depending on the application between 3 and 50 ⁇ m in the cleaning liquid container 16 leads.
  • a rinsing liquid container 36 which contains rinsing liquid 38, is via a line 40 by a first valve, a flushing pump 42, another valve, a fine filter 44, for example a cartridge filter with a fineness of 25 ⁇ , and a flow meter 46 connected to the three-way valve 24. From the three-way valve 30 leads a line 47 through a filter 48 with a fineness of, for example, 500 ⁇ into the rinsing liquid container 36.
  • the rinsing liquid container 36 is also over a connecting line 49 leading out of it in the region of its liquid level connected to the cleaning liquid container 16.
  • the pressure in the lines 20 and 40 can be measured with pressure gauges 50 and 51, respectively become.
  • the pressure drop in the fine filter 44 can be measured by means of a differential pressure sensor 52 so that the filter can be monitored and replaced in good time.
  • a circulation line 70 in is located above the cleaning liquid container 16 the cleaning liquid container 16.
  • Another line 72 leads through a valve and a pump 74 into an evaporator 76 with an evaporation chamber 78 and a distillation chamber 80.
  • One contained in the evaporation chamber 78 Heating device is not shown.
  • a line 82 leads from the distillate chamber 80 through a valve and a pump 84 into the rinsing liquid container 36.
  • a refill container 86 is connected to the rinse liquid container 38 via a valve containing line 88 connected.
  • a line 88 leads from the settling chamber 64 and out of the evaporation chamber 78 leads a line 90 into a dirty liquid container 92.
  • An electronic control device 94 serves to control the pumps and valves with a microprocessor 96 and memory devices 98 and 100, whose inputs 102 with sensors contained in the described system, such as the pressure measuring devices 48, 50 and 52, the flow meters 23 and 46 and others, sensors, not shown, such as temperature sensors, etc., are connected, and whose outputs 104 are connected to the valves and pumps.
  • the described device or the described system works, for example as follows:
  • the rinsing liquid container 38 is filled with cleaning-active liquid until through which the rinsing liquid container 36 with the cleaning liquid container 16 connecting connecting line 49 also through the cleaning liquid container 16 is filled with the cleaning active liquid.
  • an active cleaning liquid preferably serves a liquid containing more than 60% water and at least one organic component with at least one kind of molecules with lipophilic and contains hydrophilic components.
  • the entire filling can take place via the refill container 86, in which a Refill reserve of cleaning-active liquid remains.
  • the three-way valves 24 and 28 switched and the corresponding opening of the non-numbered valves Flushing pump 42 is put into operation, whereupon the cleaned objects 12 intensively be rinsed.
  • the rinsing liquid runs between the rinsing liquid container 36 and the rinse chamber 10 ⁇ m.
  • the flushing is carried out by means of the flow meter 46 and the pressure transmitter 5 and 52 controls.
  • the fine filter 44 is replaced when the pressure transmitter 52 has a differential pressure which is above a threshold value and which depends on the liquid throughput measured with the flow meter 46, exceeds a threshold.
  • a reprocessing advantageously also takes place during the cleaning and / or rinsing the cleaning liquid 18, by using an appropriate Throughput from the cleaning liquid container 16 by means of the pump 56 is pumped out and after pre-cleaning in the particle filter 58 (which can be replaced if necessary is) supplied to the separation container 60.
  • dirty liquid settling out in the inlet chamber 62 overflows and collects in the settling chamber 64, from which it is the dirty liquid container 92 is supplied.
  • the separation container 60 at Dirt that is gravimetrically heavier than the cleaning-active liquid is like this can be constructed so that it settles on the bottom of the separating container Dirt is removed.
  • Part of the collected in the overflow chamber 68 liquid freed from gravimetrically separable dirt passes through the Circulation line 70 back into the cleaning liquid container 16.
  • the liquid is transferred to the distiller or gravimetric dirt Evaporator 76 supplied, from where the condensate after evaporation to the rinsing liquid container 36 is fed again.
  • a single cleaning-active liquid for used the cleaning and rinsing of items to be cleaned the cleaning liquid in a cycle that is separate from the cleaning and rinsing process is freed of dirt and reused. It it is understood that the type and concentration of the organic component (s) are such is that after draining and drying the rinsing liquid at least approximately no residues remain on the cleaned surfaces.
  • the device according to the invention can be modified in many different ways be, the process described then being modified accordingly.
  • the circulation line 70 can be omitted so that the entire of pollution Free the active cleaning liquid from the rinsing liquid container 36 is supplied and from there via the connecting line 93 into the cleaning liquid container 16 streams.
  • the settling device can be omitted or bypassed by connecting a line directly from the cleaning liquid container to the Distiller or evaporator 76 leads.
  • the filters may be missing or additional filters may be provided. That is advantageous composed of the separator tank 60 and the evaporator or distiller 76 Dirt removal system can have any other suitable structure to have. The energy requirement of the distiller 76 can be reduced by that you work under negative pressure. A vacuum system necessary for this is not shown.
  • the cleaning chamber 10 can be provided with a temperature control device, so that the cleaning temperature and the rinse temperature are set differently can be. It can also be a rinsing chamber separate from the cleaning chamber be present so that, for example, already cleaned objects are rinsed can be cleaned while cleaning uncleaned items.
  • the refill container 86 is modified accordingly, for example through a container with organic matter and another container with water added.
  • the cleaning liquid container 16 and the rinsing liquid container 36 can separate dirt removal circuits can be provided. Likewise, the Cleaning liquid container 16 and the rinsing liquid container 36 separately from each other be loaded with the same cleaning fluid.
  • the composition has a decisive influence on the effectiveness of the cleaning the active cleaning liquid.
  • This has proven to be particularly advantageous Use of an active cleaning liquid, which consists of water and a organic component with molecules with lipophilic and hydrophilic groups, the organic component with a view to a good solution of the corresponding The proportion of dirt in the objects 12 to be cleaned is selected.
  • the organic component can consist of different constituents or molecules be composed.
  • the organic component is advantageous such that they are in water within certain concentration ranges and temperature ranges is completely soluble, in the existing concentration at that in the Cleaning chamber 10 prevailing temperature but not miscible with water is so that the cleaning-active liquid during cleaning is in the state of a Mixing gap is present, so that in a water-rich continuous phase Droplets of an organic phase are present.
  • the advantageous according to the invention used cleaning active liquid thus forms with appropriate mechanical Agitation is an emulsion of organic matter in water, i.e. it contains more in total Water as organic. This condition becomes apparent during cleaning and rinsing preferably maintained by objects immersed in the liquid intensely stirred, circulated, subjected to ultrasound or otherwise agitated becomes.
  • Such a cleaning-active liquid surprisingly has a cleaning power, which is significantly higher than the low concentration of organic Component corresponds. This may be due to the organic rich Droplets due to their surface tension when impacting the Develop a mechanical effect on the surface to be cleaned and also on the The surface looks like a 100% organic component. Overall, the The surface tension of the liquid is reduced by the organic-rich droplets and because of the small droplets, the cleaning liquid has a very large one Total surface area.
  • the high water content of the active cleaning liquid dissolves additionally inorganic dirt components.
  • the separation of dirt from the cleaning-active liquid is particularly important effective when the cleaning active liquid in the separating tank 60 as a result of a temperature prevailing in the cleaning chamber 10 different temperature is not in the state of the mixture gap.
  • the of The dirt loosened from the organic droplet then settles on the whole Surface of the real mixture or solution (or, if it is gravimetric is heavier than the cleaning-active liquid at the bottom of the container 60), so that it can be deducted effectively.
  • the separator tank 60 and / or the cleaning chamber 10 with an appropriate Provide temperature control device.
  • the organic component forms an azeotrope with the water and the content of the organic component in the water that of that in the evaporation prevailing pressure-dependent azeotropic composition corresponds.
  • the vapor has the same composition as the liquid, so that there is no change in concentration during evaporation, i.e. the liquid in the evaporation chamber 78 has the same composition as that in the Liquid forming distillate chamber 80.
  • the evaporator 76 can then be continuous work. For reasons of energy saving, it is advantageous if the evaporation is carried out at a pressure below the atmospheric pressure to which the Concentrations are matched.
  • R 1 - [X n ] - R 3 in which R 1 and R 3 each independently represent H, CH 3 , C 2 H 5 , straight-chain or branched, saturated or unsaturated C 3 to C 18 alkyl groups in which one or more non-adjacent CH 2 -, CHR- or CR 2 groups can be replaced by - O -, hydroxy, imido, in which the hydrogen can be replaced by saturated or unsaturated C 1 to C 8 alkyl groups, saturated or unsaturated cyclic C 3 to C 6 groups in which one or more are not neighboring CH 2 , CHR or CR 2 groups can be replaced by - O -;
  • the Temperatures prevailing in the cleaning chamber 10 are advantageously between 30 ° C and 60 ° C, more advantageously between 40 ° C and 50 ° C.
  • Greases oils, metalworking fluids, drilling and cutting oils, lapping and polishing pastes, Release agents, resins, fluxes, salts, activators, anti-corrosion fluids, silicone oils, Waxes, preservatives. Soldering aids, coolants and lubricants etc., whereby the organic component (s) are matched to these contaminants.
  • Precision parts precision mechanical components, electronic assemblies, optical precision parts (e.g. lenses), engine parts, controls, aerospace components, Surfaces for preparing soldered, adhesive and bonded connections, etc.
  • a cleaning-active liquid according to the table below, in which the pressure of the respective organic component (substance) prevailing during evaporation in mbar, the respective evaporation temperature in ° C., and the respective content of the substance in water corresponding to the azeotropic composition is given in percentages by weight.
  • Pressure [mbar] material Temperature [° C] Salary [%] 100 PnP 44 34.5 PnB 44 14.3 DPnP 45 2.6 DPnB 45 0.9 1013 PnP 97 40.1 PnB 98 30.3 DPnP 99 8.9 DPnB 99 3.7
  • cleaning-active liquids which are completely free of surfactants or other cleaning-active components, that are consumed as a result of a chemical reaction with dirt to be removed and therefore not recycled through simple physico-chemical processes or can be prepared.
  • the cleaning active liquid small amounts of corrosion inhibitors, defoamers, drain additives and / or cleaning boosters of, for example, less than a total of 2 percent by weight can be added.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP04011770A 2003-05-27 2004-05-18 Procédé et dispositif pour nettoyer des objets par voie humide Withdrawn EP1481740A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10324105 2003-05-27
DE2003124105 DE10324105B4 (de) 2003-05-27 2003-05-27 Verfahren und Vorrichtung zum Flüssigreinigen von Gegenständen

Publications (2)

Publication Number Publication Date
EP1481740A2 true EP1481740A2 (fr) 2004-12-01
EP1481740A3 EP1481740A3 (fr) 2006-04-19

Family

ID=33103610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04011770A Withdrawn EP1481740A3 (fr) 2003-05-27 2004-05-18 Procédé et dispositif pour nettoyer des objets par voie humide

Country Status (2)

Country Link
EP (1) EP1481740A3 (fr)
DE (1) DE10324105B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2271442A4 (fr) * 2007-11-09 2014-03-12 Chemchamp Barbados Inc Dispositif de lavage de pièces
EP2977116A1 (fr) * 2014-06-23 2016-01-27 Robert Sporer Installation de lavage destinée à nettoyer des pièces telles que des pièces de machine ou analogues
CN113351557A (zh) * 2021-03-01 2021-09-07 机械工业第九设计研究院有限公司 一种汽车生产用零件清洗装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115025506B (zh) * 2022-02-26 2023-11-10 无锡新弘田环保技术有限公司 一种蒸馏回收系统的动态浓缩蒸馏方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3256630B2 (ja) * 1994-06-24 2002-02-12 株式会社トクヤマ 洗浄方法
GB9505055D0 (en) * 1995-03-09 1995-05-03 Dow Europ Sa Cleaning process and apparatus
DE19605393A1 (de) * 1996-02-14 1997-08-21 Meissner Werner Verfahren zum Trocknen industrieller Teile in einer Trockenkammer sowie Anlage zur Durchführung des Verfahrens
DE29724628U1 (de) * 1996-03-08 2002-08-29 Dr. O.K. Wack Chemie GmbH, 85053 Ingolstadt Reinigungsflüssigkeit
DE19609119C2 (de) * 1996-03-08 1999-08-26 Wack O K Chemie Gmbh Verfahren zum Reinigen von Gegenständen
DE19619269C2 (de) * 1996-05-13 2000-06-21 Wack O K Chemie Gmbh Verfahren und Vorrichtung zum maschinellen Reinigen von Gegenständen
DE19908434A1 (de) * 1999-02-26 2000-10-05 Wack O K Chemie Gmbh Verfahren und Reinigungsflüssigkeit zum Flüssigreinigen von Gegenständen
DE29924232U1 (de) * 1999-02-26 2003-02-27 Dr. O.K. Wack Chemie GmbH, 85053 Ingolstadt Reinigungsflüssigkeit zum Flüssigreinigen von Gegenständen
US20030040456A1 (en) * 2000-10-13 2003-02-27 Tetsuo Imai Method and apparatus for cleaning article
DE10060891C1 (de) * 2000-12-07 2002-07-25 Wack O K Chemie Gmbh Verfahren zum Flüssigreinigen von Gegenständen
FR2859400B1 (fr) * 2003-09-08 2006-02-17 Daniel Arbogast Procede industriel pour le nettoyage de pieces mecaniques, et le dispositif de machine pour sa mise en oeuvre

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2271442A4 (fr) * 2007-11-09 2014-03-12 Chemchamp Barbados Inc Dispositif de lavage de pièces
EP2977116A1 (fr) * 2014-06-23 2016-01-27 Robert Sporer Installation de lavage destinée à nettoyer des pièces telles que des pièces de machine ou analogues
CN113351557A (zh) * 2021-03-01 2021-09-07 机械工业第九设计研究院有限公司 一种汽车生产用零件清洗装置

Also Published As

Publication number Publication date
DE10324105B4 (de) 2006-06-14
EP1481740A3 (fr) 2006-04-19
DE10324105A1 (de) 2004-12-23

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