EP3942092A2 - Method for operating a treatment system, treatment system, and use of a treatment system - Google Patents
Method for operating a treatment system, treatment system, and use of a treatment systemInfo
- Publication number
- EP3942092A2 EP3942092A2 EP20717087.9A EP20717087A EP3942092A2 EP 3942092 A2 EP3942092 A2 EP 3942092A2 EP 20717087 A EP20717087 A EP 20717087A EP 3942092 A2 EP3942092 A2 EP 3942092A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- treatment
- medium
- workpieces
- treatment medium
- rinsing
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 239000012528 membrane Substances 0.000 claims description 37
- 238000001728 nano-filtration Methods 0.000 claims description 23
- 238000000576 coating method Methods 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 15
- 239000012466 permeate Substances 0.000 claims description 14
- 238000011010 flushing procedure Methods 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 13
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 10
- 239000010409 thin film Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 7
- 239000007859 condensation product Substances 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 150000002363 hafnium compounds Chemical class 0.000 claims description 7
- 230000007062 hydrolysis Effects 0.000 claims description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 239000012465 retentate Substances 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 7
- 239000005011 phenolic resin Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 5
- 229910021594 Copper(II) fluoride Inorganic materials 0.000 claims description 5
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 5
- 229910001431 copper ion Inorganic materials 0.000 claims description 5
- 229910001437 manganese ion Inorganic materials 0.000 claims description 5
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 5
- 229920001568 phenolic resin Polymers 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 150000003755 zirconium compounds Chemical class 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/86—Regeneration of coating baths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/56—Polyamides, e.g. polyester-amides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/18—Details relating to membrane separation process operations and control pH control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/26—Further operations combined with membrane separation processes
- B01D2311/2649—Filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/20—Specific permeability or cut-off range
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/34—Molecular weight or degree of polymerisation
Definitions
- the present invention relates to a treatment plant, a method for operating a treatment plant and a use of the treatment plant, in particular for treating workpieces.
- Treatment systems can be used for coating, for example, in workpiece processing.
- a treatment system can be a system for zinc phosphating of workpieces, in particular vehicle bodies.
- a treatment system for treating workpieces is known, for example, from DE 101 42 933 A1.
- the present invention is based on the object of providing a method for operating a treatment system, a treatment system and a use of a treatment system in which an optimized workpiece treatment is made possible.
- the method for operating a treatment plant preferably comprises the following:
- Treatment medium is produced.
- the rinsing medium is produced by filtration, in particular nanofiltration of the treatment medium.
- the treatment medium is preferably separated into a permeate and a retentate by filtration, in particular nanofiltration.
- the permeate can be used, for example, as a rinsing medium, in particular without any post-treatment of the permeate following the filtration.
- the treatment medium is separated into a permeate and a retentate by filtration, in particular nanofiltration, and that the permeate is used as a rinsing medium, with at least about 50%, in particular at least about 75%, preferably at least about 95% , the substances required for treating the workpieces are separated from the treatment medium.
- the substances required for treating the workpieces, in particular the layer-forming components preferably comprise one or more of the following substances: at least one organoalkoxysilane and / or at least one hydrolysis and / or condensation product thereof, at least a zirconium, titanium and / or hafnium compound, manganese ions,
- Copper ions and / or fluoride, especially free fluoride are copper ions and / or fluoride, especially free fluoride.
- An organoalkoxysilane has at least two hydrolyzable alkoxy groups and at least one organic, non-hydrolyzable group per molecule, the alkoxy groups being attached via an Si-O bond and the non-hydrolyzable groups being attached via an Si-C bond.
- the treatment medium is layer-forming and comprises individual or several of the following substances as layer-forming components: at least one organoalkoxysilane and / or at least one
- the treatment medium is layer-forming and, as the layer-forming component, at least one zirconium, titanium and / or hafnium compound, in particular at least one
- Zirconium compound and at least one organoalkoxysilane and / or at least one hydrolysis and / or condensation product thereof, so that and / or wherein the treatment medium is or forms a zirconium oxide-based thin-film system.
- the treatment of the workpieces is in particular a coating of the workpieces.
- the treatment medium is used to produce an epoxy and / or phenolic resin for producing and / or forming a coating.
- the workpieces are provided with a layer by means of the treatment medium which comprises an epoxy and / or phenolic resin or is formed from an epoxy and / or phenolic resin.
- a layer can be formed which is formed from or comprises an amine-modified epoxy resin (polyepoxide).
- the rinsing medium is to be produced from the treatment medium and the treatment medium in particular comprises one or more of the substances described above, it can be advantageous for optimized filtration, in particular nanofiltration, if the treatment medium has a pH of the same before filtration, in particular nanofiltration Has value which is adapted in particular to a membrane for carrying out the filtration, in particular nanofiltration.
- the pH value is in particular at least 4, for example at least 4.5, preferably at least 5. Alternatively or in addition to this, it can be provided that the pH value is at most approximately 6, in particular at most approximately 5.5, preferably at most approximately 5.
- the rinsing medium has a pH value of at least 3, for example at least 3.5, further for example at least 4, in particular at least 4.5, preferably at least 5, before it is applied to the workpieces. In this way, in particular, an efficient rinsing effect can be achieved. In addition, a subsequent reaction of the treatment medium adhering to the workpieces can thereby preferably be prevented quickly.
- a membrane is used to produce the rinsing medium from the treatment medium.
- a water value one for filtration, ins The particular nanofiltration membrane used is preferably at most approximately 50 l / m 2 h, in particular at most approximately 35 l / m 2 h.
- a plurality of membranes for filtration, in particular nanofiltration, are preferably provided, through which the treatment medium can in particular flow parallel to one another in order to produce the rinsing medium.
- a treatment system for treating workpieces is, in particular, a treatment system for coating workpieces.
- the treatment facility preferably comprises the following:
- a treatment basin which with a treatment medium for
- Treatment of the workpieces is filled or fillable
- a rinsing device for applying a rinsing medium to the work pieces
- a processing device for producing rinsing medium from the treatment medium, wherein the rinsing medium can be produced by means of the processing device, preferably by filtration, in particular nanofiltration, of the treatment medium.
- the treatment system preferably has one or more of the features and / or advantages described in connection with the method.
- the treatment system preferably comprises two pump devices connected in series for driving the treatment medium and / or rinsing medium.
- An intermediate filter device in particular a candle filter and / or a gravel filter and / or a glass bead filter and / or a police filter, is preferably arranged between the two pump devices.
- a pore size of such a filter device is preferably at most approximately 20 ⁇ m, for example at most about 10 pm, for example at most about 1 pm.
- At least one pump device is preferably controllable and / or regulatable by means of a control device of the treatment system in such a way that an increasing pressure drop in the intermediate filter device, which results from an increasing degree of loading of the intermediate filter device with increasing operating time, is compensated.
- the at least one pump device can be controlled for this purpose by means of a frequency converter.
- the pressure drop can be determined in particular by means of a sensor device.
- the processing device comprises several membrane modules for filtration, in particular nanofiltration, of the treatment medium.
- the treatment medium can preferably flow through the membrane modules parallel to one another.
- At least one pump device is preferably controllable and / or regulatable by means of a control device of the treatment plant in such a way that an increasing pressure drop in the one or more membrane modules, which results from an increasing degree of loading of the one or more membrane modules with increasing operating time, is compensated.
- the at least one pump device can be controlled for this purpose by means of a frequency converter.
- the processing device comprises a single pressure pipe stage.
- the processing device preferably comprises a pretreatment device, which with respect to a flow direction of the treatment medium upstream of one or more membrane modules of the Processing device is arranged.
- the pretreatment device preferably comprises a separation device for separating out particulate contents of the treatment medium.
- the treatment system according to the invention is particularly suitable for carrying out the method according to the invention.
- the present invention therefore also relates to the use of a
- Treatment plant in particular a treatment plant according to the invention, for carrying out a method, in particular a method according to the invention.
- a thin layer can be applied to a workpiece by means of the method.
- a thin layer can be produced, for example, by means of a zirconium oxide-based thin-layer system.
- Oxsilan from Chemetall can be used as a layer-forming agent
- Treatment medium be provided.
- the workpieces are rinsed when leaving and / or after leaving the treatment basin, for example under Use of water, preferably fully demineralized water
- the rinsing medium used to rinse the workpieces can, for example, be introduced into the treatment basin or otherwise taken up.
- the rinsing medium results in, for example, a dilution of the treatment medium or some other influence on the composition of the rinsing medium
- Treatment medium This can be compensated, for example, by a continuous exchange of treatment medium in the treatment basin, in particular by disposing or processing a bath overflow from the treatment basin in order to remove unwanted reaction products from the bath and to avoid the accumulation of non-layer-forming components in the bath.
- an amount of the flushing medium can be independent of an amount of treatment medium discharged, discharged and / or disposed of from the treatment basin.
- the amount of rinsing medium for rinsing off the workpieces can thus be increased significantly without causing a dilution or other impairment of the treatment medium.
- the treatment medium carried out by means of the workpieces from the treatment basin does not have to be separately prepared or disposed of.
- a permeate is preferably generated from the treatment medium with the aid of nanofiltration, by means of which the workpieces are rinsed off.
- the retentate in particular a concentrate of the treatment medium, is preferably fed back into the treatment basin.
- the retentate contains in particular the layer-forming components of the treatment medium.
- a concentration of the layer-forming components in the treatment medium can preferably be kept at least approximately constant.
- a membrane of a membrane module is in particular a thin-film composite membrane which, for example, has an active separating layer made of poly amide and / or a MWCO (molecular weight cut-off) in the range of at least approximately 100 Da, for example at least approximately 150 Da, preferably at most about 400 Da, for example at most about 300 Da.
- thin-film composite membranes are suitable for producing the flushing medium, in particular those which preferably have an active separating layer made of polyamide and / or a MWCO of at least 100 Da.
- a nanofiltration membrane can be, for example, NF270 from Dow Chemical and / or Desal HL from Suez. Especially this one
- Membranes are preferably characterized by a retention of a MgSO 4 solution of at least approximately 90%, for example at least approximately 95% or at least approximately 97%.
- a separation of the layer-forming components of the treatment medium is preferably achieved by means of the nanofiltration without complete desalination of the treatment medium.
- the layer-forming components of the treatment medium are preferably at least about 50%, preferably at least about 70%, in particular at least about 90%, and / or at most about 99%, in particular at most about 98%, in particular by one
- Excessive desalination of the treatment medium can lead to strong acidification of the permeate and thus of the flushing medium. In particular, this can lead to a pH-related dissolution of a coating on the workpiece and / or to the formation of flash rust, especially on steel surfaces, which of course should be avoided.
- the membrane is designed in particular to avoid an excessive pH shift in the acidic range and also to ensure adequate retention of the layer-forming components.
- the treatment medium in addition to inorganic components such as at least one zirconium, titanium and / or hafnium compound, manganese ions, copper ions and / or fluoride, in particular free fluoride, also organic components such as at least one organoalkoxysilane and / or at least one Hydrolysis and / or condensation product thereof, it can become a
- flux waste associated with organic fouling is preferably so low that a chemical cleaning cycle for cleaning the membrane is several weeks or even several months. This enables efficient, low-maintenance operation.
- the fouling potential of a fluid volume flow supplied to the membrane (treatment medium flow) can preferably be reduced.
- the fouling potential is expressed in particular as a colloid index (KI) or as a silt density index (SDI), a value of less than 8, for example less than 5, in particular less than 3, being preferably achieved.
- a weakly alkaline or weakly acidic rinse can be provided in order to remove residual deposits from the membrane.
- the treatment medium is preferably pretreated, in particular for the separation of particulate ingredients.
- bath care facilities that are preferably present, for example for removing pickling and / or precipitation sludge from the treatment medium, can be used.
- a pretreatment device can for example comprise a chamber filter press, a gravel filter and / or a glass bead filter.
- the capacity of the pretreatment device is adapted in particular to the capacity of the one or more membrane modules, in particular in order to ensure constant volume flow at the one or more membrane modules.
- the treatment medium is preferably not saturated in a state intended for the treatment of workpieces, in particular with regard to possible precipitations.
- the treatment medium can be up to one
- a part of the concentrate / retentate then results in particular from at least three or at least four parts of the treatment medium.
- at least two parts or at least three parts of permeate are provided as the flushing medium.
- a water recovery (wrc) is thus for example at least about 60%, for example at least about 75%.
- FIG. 1 shows a schematic representation of a treatment system in which a conventional rinsing device is provided.
- FIG. 2 shows a schematic representation of a corresponding to FIG. 1
- Treatment system in which a treatment device for producing a rinsing medium from treatment medium is seen before.
- a first embodiment, shown in FIG. 1, of a treatment system designated as a whole by 100 is, for example, an immersion treatment system 102 for treating workpieces 104.
- the workpieces 104 are vehicle bodies 106, for example.
- a protective layer for example a corrosion protection layer, or another coating can be applied to the workpiece 104 by means of the treatment system 100.
- the treatment system 100 comprises a treatment basin 108 which is filled with a treatment medium 110 and into which the workpiece 104 can be immersed.
- the treatment medium 110 is in particular a thin-film system for coating workpieces 104.
- the thin-film system is in particular a zirconium oxide-based thin-film system.
- the treatment system 100 therefore preferably comprises a rinsing device 112, by means of which a rinsing medium 114 can be applied to the workpiece 104.
- the rinsing medium 114 enables in particular an immediate removal of the treatment medium 110 from the workpiece 104 by a coating process immediately after the removal of the workpiece 104 from the
- Stop treatment basin 108 Stop treatment basin 108.
- a mixture of rinsing medium 114 and treatment medium 110 arises which, depending on the composition of the treatment medium 110 and / or of the rinsing medium 114, may have to be disposed of or processed in a complex manner. If the rinsing medium 114 together with the treatment medium 110 rinsed off the workpiece 104 is simply introduced into the treatment basin 108, a dilution of the treatment medium 110 or some other chemically different composition of the treatment medium 110 can result, which can impair the treatment process.
- a second embodiment of a treatment system 100 shown in FIG. 2 therefore preferably comprises a treatment device 116, by means of which rinsing medium 114 can be produced from the treatment medium 110.
- the treatment medium 110 can be materially separated by means of the processing device 116, in order in particular to separate off the layer-forming components of the treatment medium 110.
- Treatment medium 110, at least approximately completely freed from the coating components, can then be used as rinsing medium 114.
- Both parts separated from one another by means of the processing device 116 can be brought together in the treatment basin 108, resulting in an essentially constant composition of the treatment medium 110 in the treatment basin 108.
- the processing device 116 preferably comprises a pre-treatment device 118 and / or an intermediate filter device 120.
- the pretreatment device 118 and / or the intermediate filter device 120 By means of the pretreatment device 118 and / or the intermediate filter device 120, it is possible in particular to separate particulate components, for example suspended matter, etc., from the treatment medium 110.
- One or more membrane modules 122 of the treatment device 116 which separate a portion of the liquid that can be used as a rinsing medium 114 from the treatment medium 110, are preferably protected from coarse contamination by means of the pretreatment device 118 and / or the intermediate filter device 120.
- the processing device 116 preferably comprises a plurality of pump devices 124.
- a pumping device 124 is upstream of the Vor
- a further pumping device 124 can be arranged downstream of the pretreatment device 118 and / or the intermediate filter device 120 and / or upstream of the one or more membrane modules 122.
- a pumping device 124 can be provided downstream of the one or more membrane modules 122, for example.
- the pump devices 124 can in particular be controlled and / or regulated as a function of a differential pressure upstream or downstream of the one or more membrane modules 122.
- a pressure difference that varies in the one or more membrane modules 122 due to varying impurities can be compensated by means of the pump device 124. In this way, a predetermined amount of flushing medium can be reliably provided.
- a continuous, low-maintenance and efficient treatment operation preferably results.
- additional treatment medium 110 liquid, for example fully demineralized water, and / or coating components of the treatment medium 110 is required to ensure a continuous
- a nanofiltration membrane can be provided as a membrane in one or more membrane modules 122, which allows a pH of the rinsing medium 114 of at least 4, for example at least 4.5, when the pH of the
- Treatment medium 110 is, for example, between approximately 4 and 5 and a retention of the layer-forming components of the treatment medium 110 is at least approximately 60%, for example at least approximately 90%, in particular approximately 98%.
- the processing device 116 is preferably dimensioned and designed such that a single pressure pipe stage is provided. In this way, the expenditure for flushing with chemicals can preferably be reduced. In particular, fully automatic operation of the processing device 116 is possible.
- the second embodiment of the treatment system 100 shown in FIG. 2 corresponds in terms of structure and function to the embodiment shown in FIG. 1, so that the above description Exercise is referred to in this respect.
- any combination of features of the embodiments described above can be provided, if appropriate in combination with individual or multiple features of the introduction to the description.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Water Supply & Treatment (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019203989.8A DE102019203989A1 (en) | 2019-03-22 | 2019-03-22 | Method for operating a treatment plant, treatment plant and use of a treatment plant |
PCT/DE2020/100226 WO2020192843A2 (en) | 2019-03-22 | 2020-03-20 | Method for operating a treatment system, treatment system, and use of a treatment system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3942092A2 true EP3942092A2 (en) | 2022-01-26 |
Family
ID=70189637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20717087.9A Pending EP3942092A2 (en) | 2019-03-22 | 2020-03-20 | Method for operating a treatment system, treatment system, and use of a treatment system |
Country Status (6)
Country | Link |
---|---|
US (1) | US20220161192A1 (en) |
EP (1) | EP3942092A2 (en) |
CN (1) | CN113631754A (en) |
DE (1) | DE102019203989A1 (en) |
MX (1) | MX2021011495A (en) |
WO (1) | WO2020192843A2 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19743933B4 (en) * | 1997-10-04 | 2009-11-19 | Volkswagen Ag | Process for the surface treatment of solid bodies, in particular motor vehicle bodies |
DE19813058A1 (en) * | 1998-03-25 | 1999-09-30 | Henkel Kgaa | Work-up of phosphating bath overflows and/or rinsing water |
JP3742264B2 (en) * | 1999-12-09 | 2006-02-01 | 日本ペイント株式会社 | Flushing water recovery method and metal surface treatment apparatus for phosphate coating conversion treatment |
DE10030462A1 (en) * | 2000-06-21 | 2002-01-03 | Henkel Kgaa | Adhesion promoter in conversion solutions |
DE10043927A1 (en) * | 2000-09-06 | 2002-03-14 | Enviro Chemie Gmbh | Process for treating rinsing water used for phosphating metallic surfaces comprises subjecting the rinsing water to membrane separation, returning the concentrate to the bath, and demineralizing the permeate and returning as rinsing water |
JP2004533541A (en) * | 2001-06-08 | 2004-11-04 | ヘンケル・コマンディットゲゼルシャフト・アウフ・アクチエン | Method of preventing membrane blockage in wastewater treatment in phosphate treatment |
DE10142933A1 (en) | 2001-06-08 | 2002-12-12 | Henkel Kgaa | Membrane filtration of zinc phosphation bath overflow or washing water, e.g. in car, domestic appliance or steel industry, involves adding reagent inhibiting membrane blocking and/or cleaning membrane with acid |
EP1371756A2 (en) * | 2002-06-12 | 2003-12-17 | Nissan Motor Co., Ltd. | Equipment and method of pretreatment before painting |
DE10257074B4 (en) * | 2002-12-06 | 2018-07-26 | Henkel Ag & Co. Kgaa | Process for treating phosphating bath overflow or rinse water after phosphating |
DE102008038653A1 (en) * | 2008-08-12 | 2010-03-25 | Henkel Ag & Co. Kgaa | Successive anti-corrosive pretreatment of metal surfaces in a multi-stage process |
DE102010054932A1 (en) * | 2010-12-17 | 2011-08-25 | Daimler AG, 70327 | System i.e. dip painting line, for cathodic dip painting of body of motor vehicle, has ultra-filters for filtering water collected in station, where filtrate of ultra-filters is transmitted to rinsing station as rinsing medium |
DE102012021865A1 (en) * | 2012-11-07 | 2014-05-08 | Bejotec Gmbh | Preparing articles e.g. vehicle bodies involves immersing objects in pretreatment bath containing medium, adhering articles with flushing medium, and supplying flow of medium to separation unit for separating filtrate from concentrate |
-
2019
- 2019-03-22 DE DE102019203989.8A patent/DE102019203989A1/en not_active Withdrawn
-
2020
- 2020-03-20 US US17/441,607 patent/US20220161192A1/en active Pending
- 2020-03-20 EP EP20717087.9A patent/EP3942092A2/en active Pending
- 2020-03-20 WO PCT/DE2020/100226 patent/WO2020192843A2/en active Application Filing
- 2020-03-20 CN CN202080021730.3A patent/CN113631754A/en active Pending
- 2020-03-20 MX MX2021011495A patent/MX2021011495A/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2020192843A3 (en) | 2020-11-19 |
US20220161192A1 (en) | 2022-05-26 |
DE102019203989A1 (en) | 2020-09-24 |
CN113631754A (en) | 2021-11-09 |
MX2021011495A (en) | 2021-12-15 |
WO2020192843A2 (en) | 2020-10-01 |
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