EP0434994A1 - Verfahren zum Abspülen der Oberfläche von in wässriger Aktivbadlösung behandelter Gegenstände, sowie Anordnung zur Durchführung des Verfahrens - Google Patents

Verfahren zum Abspülen der Oberfläche von in wässriger Aktivbadlösung behandelter Gegenstände, sowie Anordnung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0434994A1
EP0434994A1 EP90122582A EP90122582A EP0434994A1 EP 0434994 A1 EP0434994 A1 EP 0434994A1 EP 90122582 A EP90122582 A EP 90122582A EP 90122582 A EP90122582 A EP 90122582A EP 0434994 A1 EP0434994 A1 EP 0434994A1
Authority
EP
European Patent Office
Prior art keywords
rinsing
container
active
active bath
bath
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Withdrawn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
EP90122582A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rudolf Kreisel
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.)
Bayer Pharma AG
Original Assignee
Schering AG
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 Schering AG filed Critical Schering AG
Publication of EP0434994A1 publication Critical patent/EP0434994A1/de
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/16—Regeneration of process solutions
    • C25D21/22—Regeneration of process solutions by ion-exchange
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/08—Rinsing
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/16—Regeneration of process solutions
    • C25D21/20—Regeneration of process solutions of rinse-solutions

Definitions

  • the invention initially relates to a method according to the preamble of claim 1.
  • Such a method and a cascade arrangement are known from electroplating technology 77 (1986 No. 2, (pages 294 to 300).
  • This method achieves a reduction in the consumption of rinse water, larger ones are incurred Amounts of wastewater that contain the entire amount of the towed active bath solution in diluted form that has to be treated.
  • Such treatment can be very cost-intensive.
  • Residual materials, such as heavy metal hydroxide sludge accumulate in landfills. If these problems are not adequately observed, collisions with environmental protection regulations can arise.
  • Galvanotechnik 78 (1987) No. 3 starts with an active bath that works at a relatively high temperature, e.g. 60 ° C, at which the water content of the active bath evaporates and is released into the environment.
  • This arrangement and the method operated with it differ in this essential point from the preamble of claim 1 and thus from the procedure of the present invention.
  • the version according to the last-mentioned literature reference requires suction devices and possibly also arrangements in order to separate chemical components contained in the evaporation so that they do not get into the environment. Fresh rinse water must also be constantly supplied. The mentioned consequences of evaporation, as well as the constant supply of fresh rinsing water require considerable costs.
  • Contaminated rinse water is also fed from the first stage of the cascade, viewed in the direction of transport of the objects, to a device which concentrates this contaminated rinse water, the concentrate being fed to the treatment tank of the active bath and the separated water being fed into the feed of the fresh rinse water.
  • the active bath solution dragged out of the active bath by the treated objects is returned to the active bath. So there is no waste water mixed with an active bath solution.
  • a disadvantage, however, is the effort explained, which results from the fact that this arrangement or this method provides an active bath with a relatively high working temperature. These evaporation losses of the aqueous solution of the active bath are also necessary in the arrangement of this reference to the water-active bath mixture, which is concentrated from the aforementioned device, in the active bath container to be able to accommodate.
  • the object of the invention is first of all to design a method according to the preamble of claim 1 in such a way that, while avoiding the disadvantages described, a wastewater-free mode of operation is possible when the fresh water requirement is negligible.
  • the rinsing process can either be carried out in an immersion sink or the aqueous active bath solution still adhering to the treated objects is rinsed off with the rinsing water in corresponding chambers via a spray device, the rinsing water being used here in a cascade-like manner in the various stages.
  • the water contains rinsed or sprayed active bath solution, the proportion of which would increase continuously with the number of rinsing or spraying processes with the same amount of water, if not according to the preamble of claim 1 Active bath solution is brought out of the contaminated spray or rinse water.
  • Active bath solution is brought out of the contaminated spray or rinse water.
  • the method according to the invention meets all these requirements and also has the advantage that its implementation is not dependent on the presence of a higher temperature, for example of 60 ° C., of the active bath, as is the case with previously known arrangements or methods (see e.g. Galvanotechnik 78 (1987) No. 3, pages 642 to 648) is the case.
  • the method according to the invention will be used in cold working baths without significant natural evaporation of the water content of the active bath. These are usually temperatures up to 35 - 40 ° C. Working at such low temperatures, as already mentioned, has the great advantage that there are no evaporation losses in water and therefore there is no need for the disposal and removal of the evaporation and for the corresponding fresh water supply. Due to the removal of aqueous active bath solution to form fresh rinse water, space is created in the active bath tank in order to be able to return the amounts of contaminated spray or rinse water to the active bath tank. Since there is a closed cycle here, the amount of aqueous active bath solution withdrawn from the active bath tank is equal in quantity to the supply of active bath solution and a corresponding proportion of rinsing or spraying water in the active bath tank.
  • the invention also achieves the object of creating an arrangement for carrying out the method according to the invention.
  • the features of claim 4 are initially provided. They represent an effective and at the same time simple arrangement for carrying out the method.
  • the active bath container 1 there is the aqueous active bath solution 2, in which the, for example chemical, treatment of the objects not shown takes place.
  • a rinsing group 3 in the direction of transport 4 of the goods, in the form of a cascade for immersion rinsing, which can also be followed by a rinsing station 5 in the direction of the arrow 4.
  • the material to be treated is dipped into the active container 1 according to arrow 6 and removed after the treatment according to arrow 7 and introduced into the first immersion container 3.1 of the cascade 3 according to arrow 8 and washed around by the rinsing water therein in order to still work on the product or the objects to remove adhering residues of the aqueous active bath solution 2.
  • the product is then removed from the immersion container 3.1 according to arrow 9 and immersed into the further immersion container 3.2 of the cascade according to arrow 10, in order to be removed after the flushing according to arrow 11 and to be immersed and rinsed off into the third immersion container 3.3 of the cascade according to arrow 12.
  • This is followed by removal according to arrow 13 and use according to arrow 14 in the container 15 of the rinsing station, in order to finally be removed and transported away according to arrow 16 to become.
  • its water is only provided with a very small amount of active bath components which are separated from this water in an ion exchanger 7 and removed at 18.
  • the aqueous active bath solution 2 with the concentration C0 is e.g. by means of a pump via a line 27 to a separating device 28, which can generally be referred to as a "thickener". Examples of the structure and mode of operation of such separation devices 28 are explained in more detail in FIGS. 2 and 3.
  • the separating device 28 has the task of separating from the aqueous active bath solution 2 a water portion to be used as rinsing water 20, which then serves in the rinsing group 3 to rinse the active bath solution 2 from the treated goods.
  • the rinsing water 20 obtained from the separating device 28 is conducted via line 29 to the last station (immersion bath container) 3.3 of the rinsing group. From here, as explained, it flows in a cascade direction 19 through the stations 3.2 and 3.1 to the collecting tank 25.
  • the active bath solution 2 'reduced by the rinsing water portion 20 also flows into this collecting tank 25 via the line 30.
  • a regeneration unit 32 can be installed in the line 31 from the collecting container 25 to the active bath container 1, with which regeneration products and other harmful constituents can be removed from the circulated mixture conveyed by the pump 26.
  • the “thickener” or the separating device 28 can be designed as a vacuum evaporation system 33 using a heat pump 34.
  • a boiling chamber 36 is arranged in a housing 35 in the lower region, while a condensate chamber 37 is located in the upper region.
  • the heat pump 34 in a known embodiment compresses the refrigerant vapor in its compressor, the temperature of which increases. This reaches the heating coil 39 in the boiling chamber 36 via the line 38, giving off heat. From this heating coil 39, the steam is guided to a cooler 40, in which the temperature of the steam is further reduced, so that it condenses. In the cooler 40, the heat can be released into the environment or can be used in another process.
  • the liquid refrigerant is then expanded in the expansion valve 41 and fed to the cooling coil 42 designed as an evaporator. In it, it absorbs heat and thereby evaporates again.
  • the required amount of rinsing water 20 is removed from the distillate container 43 and passed to the rinsing group 3.
  • the concentrated active bath solution 2 ′ separated from the water 20 by the thickener 43 is removed from the lower region of the boiling chamber 36 and fed to the collecting container 25.
  • the energy expenditure for the evaporation of the water from the aqueous active bath solution 2 is considerably less than with direct heating, for example with electrical energy.
  • the energy consumption when using a reverse osmosis system for the extraction of the rinsing water 20 is even lower. Here it is only about 0.05 kWh per liter of water.
  • the diagram of such a device is shown in the exemplary embodiment in FIG. 3.
  • the reverse osmosis module 45 also has the task here of separating the rinsing water portion 20 that is discharged via line 29 from the aqueous active bath solution 2 supplied via line 27.
  • the concentrated active bath solution 2 ′ reduced by the rinse water content 20 is returned to the active bath container 1 via line 30.
  • feed pump 46 the prefilter 47, the ultrafine filter 48 and the high pressure pump 49.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
EP90122582A 1989-11-28 1990-11-27 Verfahren zum Abspülen der Oberfläche von in wässriger Aktivbadlösung behandelter Gegenstände, sowie Anordnung zur Durchführung des Verfahrens Withdrawn EP0434994A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893939222 DE3939222C1 (fi) 1989-11-28 1989-11-28
DE3939222 1989-11-28

Publications (1)

Publication Number Publication Date
EP0434994A1 true EP0434994A1 (de) 1991-07-03

Family

ID=6394292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122582A Withdrawn EP0434994A1 (de) 1989-11-28 1990-11-27 Verfahren zum Abspülen der Oberfläche von in wässriger Aktivbadlösung behandelter Gegenstände, sowie Anordnung zur Durchführung des Verfahrens

Country Status (2)

Country Link
EP (1) EP0434994A1 (fi)
DE (1) DE3939222C1 (fi)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136594A2 (de) * 2000-03-24 2001-09-26 SMS Demag AG Verfahren und Vorrichtung zum Betrieb einer mehrstufigen Gegenstromkaskadenspüle
WO2017194919A1 (en) * 2016-05-08 2017-11-16 Don Whitley Scientific Limited Cleaning system and cleaning method for a stylus of an inoculation apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4012022C1 (fi) * 1990-04-13 1991-07-25 Duerr Gmbh
CN1062933A (zh) * 1990-12-26 1992-07-22 胡德忠 工业生产的漂洗水微排放技术及设备
DE4220081A1 (de) * 1992-06-19 1993-12-23 Licentia Gmbh Verfahren zum Entfernen öl- oder fetthaltiger Rückstände auf Gegenständen und Vorrichtung zur Durchführung des Verfahrens
DE4309096A1 (de) * 1993-03-15 1994-09-22 Wack O K Chemie Gmbh Verfahren zur Wiedergewinnung einer in einem Spülbad gelösten Flüssigkeit
DE9418084U1 (de) * 1994-11-11 1996-03-21 Seibusch, Wilhelm, 86150 Augsburg Waschanlage
SE0001369L (sv) * 2000-04-13 2001-10-14 Obducat Ab Förfarande vid samt apparat för bearbetning av substrat

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1492715A (en) * 1976-04-20 1977-11-23 Dart Ind Inc Electrolytic regeneration of plastics etchants
FR2543978A1 (fr) * 1983-04-11 1984-10-12 Legrand Sa Procede de traitement d'articles dans un ou plusieurs bains de traitement et installation mettant en oeuvre le procede

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1492715A (en) * 1976-04-20 1977-11-23 Dart Ind Inc Electrolytic regeneration of plastics etchants
FR2543978A1 (fr) * 1983-04-11 1984-10-12 Legrand Sa Procede de traitement d'articles dans un ou plusieurs bains de traitement et installation mettant en oeuvre le procede

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136594A2 (de) * 2000-03-24 2001-09-26 SMS Demag AG Verfahren und Vorrichtung zum Betrieb einer mehrstufigen Gegenstromkaskadenspüle
EP1136594A3 (de) * 2000-03-24 2004-01-02 SMS Demag AG Verfahren und Vorrichtung zum Betrieb einer mehrstufigen Gegenstromkaskadenspüle
WO2017194919A1 (en) * 2016-05-08 2017-11-16 Don Whitley Scientific Limited Cleaning system and cleaning method for a stylus of an inoculation apparatus
GB2553745B (en) * 2016-05-08 2018-10-10 Whitley Don Scient Ltd Cleaning system and cleaning method for a stylus of an inoculation apparatus

Also Published As

Publication number Publication date
DE3939222C1 (fi) 1990-11-08

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