NO329293B1 - Method, apparatus and line for the ecological treatment of the surface of a metal container by combining a chemical action and a mechanical action - Google Patents
Method, apparatus and line for the ecological treatment of the surface of a metal container by combining a chemical action and a mechanical action Download PDFInfo
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- NO329293B1 NO329293B1 NO20055761A NO20055761A NO329293B1 NO 329293 B1 NO329293 B1 NO 329293B1 NO 20055761 A NO20055761 A NO 20055761A NO 20055761 A NO20055761 A NO 20055761A NO 329293 B1 NO329293 B1 NO 329293B1
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- solution
- acid
- treatment
- container
- stated
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 title claims description 24
- 239000002184 metal Substances 0.000 title claims description 23
- 239000000126 substance Substances 0.000 title description 4
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000004040 coloring Methods 0.000 claims abstract description 5
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 238000005238 degreasing Methods 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims description 28
- 238000005554 pickling Methods 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 14
- 238000004381 surface treatment Methods 0.000 claims description 11
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 5
- 150000004965 peroxy acids Chemical class 0.000 claims description 5
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 238000005282 brightening Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 230000003134 recirculating effect Effects 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims description 2
- 239000013527 degreasing agent Substances 0.000 claims 1
- 238000005422 blasting Methods 0.000 abstract 4
- 239000000243 solution Substances 0.000 description 43
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 150000007513 acids Chemical class 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- -1 cyclic organic acid Chemical class 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 239000010891 toxic waste Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- PEYVWSJAZONVQK-UHFFFAOYSA-N hydroperoxy(oxo)borane Chemical compound OOB=O PEYVWSJAZONVQK-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 238000011514 vinification Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0804—Cleaning containers having tubular shape, e.g. casks, barrels, drums
- B08B9/0813—Cleaning containers having tubular shape, e.g. casks, barrels, drums by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0821—Handling or manipulating containers, e.g. moving or rotating containers in cleaning devices, conveying to or from cleaning devices
- B08B9/0826—Handling or manipulating containers, e.g. moving or rotating containers in cleaning devices, conveying to or from cleaning devices the containers being brought to the cleaning device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
- B08B9/28—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking
- B08B9/34—Arrangements of conduits or nozzles
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
Abstract
Description
Den foreliggende oppfinnelse vedrører en fremgangsmåte for overflatebehandling av en metallbeholder som fremviser minst en åpning, idet fremgangsmåten mer spesielt er tiltenkt for dekapering av beholdere dannet av metallplater sammenføyd ved sveising, falsing, nagling, liming, etc. Den foreliggende oppfinnelse vedrører også en innretning og en linje for overflatebehandling av en metallbeholder som fremviser minst en åpning. The present invention relates to a method for surface treatment of a metal container which exhibits at least one opening, the method being more particularly intended for pickling containers formed from metal sheets joined by welding, folding, riveting, gluing, etc. The present invention also relates to a device and a line for surface treatment of a metal container presenting at least one opening.
Slike beholdere er f.eks. fat, tønner, stasjonære eller mobile tanker, lagringssiloer, varmtvann stanke r for oppvarming av varmt vann i hjemmet og generelt alle hule legemer. Åpningen som det refereres til kan f.eks. være tiltenkt for å motta rør-ledninger, et fylle-, oppvarmings- eller tømmesystem. Ved slutten av deres siste formingstrinn er det generelt nødvendig å behandle deres indre og ytre overflate for å fjerne oksydasjonslaget som kan være så mye som flere titalls mikrometer tykt. Når beholderen sammenstilles ved sveising er det området som rammes mest ved denne forurensningen sveisestrengen. Such containers are e.g. casks, barrels, stationary or mobile tanks, storage silos, hot water tanks for heating hot water in the home and generally all hollow bodies. The opening referred to can e.g. be intended to receive piping, a filling, heating or draining system. At the end of their last forming step, it is generally necessary to treat their inner and outer surfaces to remove the oxidation layer which can be as much as several tens of micrometers thick. When the container is assembled by welding, the area most affected by this contamination is the welding string.
For å oppnå en overflatetilstand som er forenlig med standardene for det ferdige produkt er det derfor nødvendig å dekapere, avfette, passivere eller lysgjøre dets overflate, noe som vanligvis gjøres ved anvendelse av oppløsninger ved nedsenkning i tanker inneholdende behandlingsreagensen omfattende syrer. In order to achieve a surface condition compatible with the standards of the finished product, it is therefore necessary to strip, degrease, passivate or lighten its surface, which is usually done by using immersion solutions in tanks containing the treatment reagent including acids.
I tilfellet med beholdere hvis volum overstiger noen titalls liter, slik som varmtvanns-tanker, er det også mulig å sprøyte syre ved anvendelse av et sprøytemunnstykke. I dette tilfellet sprøytes syren kald for å unngå forgifting av operatøren med dampene. In the case of containers whose volume exceeds a few tens of liters, such as hot water tanks, it is also possible to spray acid using a spray nozzle. In this case, the acid is sprayed cold to avoid poisoning the operator with the fumes.
Disse fremgangsmåtene kombinerer forskjellige ulemper fordi de er farlige å benytte, frembringer store mengder av giftig avfall som må fjernes og er heller ikke svært effektive fordi dekaperingshastigheten forblir lav. These methods combine various disadvantages because they are dangerous to use, produce large amounts of toxic waste that must be removed, and are also not very efficient because the pickling rate remains low.
Den best kjente fremgangsmåten er således fluorsalpetersyremetoden som frembyr alvorlige ulemper fordi den medfører frigjøringen av nitrøse damper. Disse dampene forårsaker en sterk atmosfærisk forurensning og forurensning av vann, og gjør for-holdene som operatørene må arbeide i særlig farlige. The best-known method is thus the fluoronitric acid method, which presents serious disadvantages because it entails the release of nitrous vapours. These vapors cause a strong atmospheric and water pollution, and make the conditions in which the operators have to work particularly dangerous.
Det er også mulig å forbedre overflatetilstanden ved anvendelse av abrasjonsmetoder slik som sliping eller børsting. Slike metoder har imidlertid en svært lav produktivitet og en høy kostnadspris. It is also possible to improve the surface condition by using abrasion methods such as grinding or brushing. However, such methods have a very low productivity and a high cost price.
EP 766 751 foreslår dekapering av metallelementer slik som trådruller ved å utsette dem for sprøytingen av syre i en avgrenset atmosfære slik som den i en dekaperings-tunnel, som en gass inneholdende oksygen regelmessig innføres i for å regenerere dekaperingsoppløsningen som taper sin effektivitet ganske hurtig. Denne metoden lar den totale dekaperingsdynamikken økes med en faktor på 2,5 i de beste tilfellene. Produktiviteten til denne metoden forblir imidlertid utilstrekkelig og problemet med de frembragte giftige dampene håndteres ikke. Operasjoner i tunnelen er dessuten spesi-fikke med hensyn til tråden. EP 766 751 proposes the pickling of metal elements such as wire rolls by exposing them to the spraying of acid in a confined atmosphere such as that of a pickling tunnel, into which a gas containing oxygen is regularly introduced to regenerate the pickling solution which loses its effectiveness rather quickly. This method allows the overall pickling dynamics to be increased by a factor of 2.5 in the best cases. However, the productivity of this method remains insufficient and the problem of the toxic fumes produced is not dealt with. Operations in the tunnel are also specific with respect to the thread.
Det er derfor et formål for den foreliggende oppfinnelse å tilveiebringe en fremgangsmåte for overflatebehandling som ikke utviser ulempene i henhold til teknikkens stil-ling og særlig lar metallbeholdere behandles uten frembringelse av store mengder av giftig avfall, i fullstendig sikkerhet hva angår operatørene, og med forbedret og høy produktivitet. It is therefore an object of the present invention to provide a method for surface treatment which does not exhibit the disadvantages according to the state of the art and in particular allows metal containers to be treated without producing large amounts of toxic waste, in complete safety as far as the operators are concerned, and with improved and high productivity.
I den hensikt, består en første oppfinnelsesgjenstand av en fremgangsmåte for overflatebehandling av en metallbeholder som fremviser minst en åpning, ved anvendelse av minst en behandlingsoppløsning, kjennetegnet ved at den omfatter trinnene som består i: - å anbringe beholderen i et behandlingskammer på en slik måte at dens åpning er rettet nedover, idet kammeret omfatter et flertall av sprøytedyser for sprøyting av To that end, a first object of the invention consists of a method for the surface treatment of a metal container presenting at least one opening, using at least one treatment solution, characterized in that it comprises the steps consisting in: - placing the container in a treatment chamber in such a way that its opening is directed downwards, the chamber comprising a plurality of spray nozzles for spraying
oppløsningen under trykk og minst et samlekar, the solution under pressure and at least one collection vessel,
- å innføre minst en sprøytedyse gjennom åpningen til beholderen, - introducing at least one spray nozzle through the opening of the container,
- å forsegle kammeret hva angår gasser og væsker overfor utsiden, deretter - to seal the chamber as far as gases and liquids are concerned from the outside, then
- å sprøyte en behandlingsoppløsning inneholdende minst en avfettings-, dekaperings-, passiverings-, lysgjørings-, rengjørings-, skyllings- eller fargingsreagens gjennom minst en sprøytedyse ved et trykk over 8 bar, og - to spray a treatment solution containing at least one degreasing, pickling, passivating, brightening, cleaning, rinsing or coloring reagent through at least one spray nozzle at a pressure above 8 bar, and
- å samle oppløsningen i samlekaret slik at den kan resirkuleres, og eventuelt, - to collect the solution in the collection vessel so that it can be recycled, and possibly,
- i rekkefølge å sprøyte andre behandlingsoppløsninger gjennom minst en sprøyte-dyse og suksessivt å samle de andre oppløsningene etter bruk i et samlekar slik at de kan resirkuleres, inntil den ønskede overflatetilstand er oppnådd. - sequentially spraying other treatment solutions through at least one spray nozzle and successively collecting the other solutions after use in a collection vessel so that they can be recycled, until the desired surface condition is achieved.
Fremgangsmåten i samsvar med oppfinnelsen kan også omfatte de følgende varianter, tatt isolert eller i kombinasjon: The method according to the invention can also include the following variants, taken in isolation or in combination:
- behandlingsoppløsningen kan sprøytes ved et trykk over 10 bar, - the treatment solution can be sprayed at a pressure above 10 bar,
- behandlingsoppløsningen sprøytes ved et trykk lavere enn 90 bar, - the treatment solution is sprayed at a pressure lower than 90 bar,
- dekaperingsoppløsningen kan inneholde minst en syre valgt fra en halogensyre, en organisk syre og en mineralsyre, - halogensyren kan være fluorsyre, mineralsyren kan være svovelsyre eller fosforsyre, og den organiske syren kan være en peroksysyre, særlig pereddiksyre, - beholderen eller det hule legemet som skal behandles kan være dannet av støpejern, stål, rustfritt stål, titan, zirkonium, kobber, nikkel eller legeringer derav, og foretrukket av støpejern, stål eller rustfritt stål, og enda mer foretrukket rustfritt - the pickling solution can contain at least one acid selected from a halogen acid, an organic acid and a mineral acid, - the halogen acid can be hydrofluoric acid, the mineral acid can be sulfuric or phosphoric acid, and the organic acid can be a peroxy acid, in particular peracetic acid, - the container or the hollow body to be treated may be formed of cast iron, steel, stainless steel, titanium, zirconium, copper, nickel or alloys thereof, and preferably cast iron, steel or stainless steel, and even more preferably stainless
stål, steel,
- redokspotensialet til dekaperingsoppløsningen opprettholdes ved en forutbestemt verdi, beliggende over det normale potensialet til sortene i oppløsning, foretrukket - the redox potential of the pickling solution is maintained at a predetermined value, situated above the normal potential of the varieties in solution, preferably
100 mV over, og enda mer foretrukket 150 mV over, 100 mV above, and even more preferably 150 mV above,
- metallbeholderen kan oppnås ved å sveise plater sammen, - the metal container can be obtained by welding plates together,
- metallbeholderen kan være en varmtvannstank men kan også være et vinfremstillingskar, en tank for transportering av f.eks. næringsprodukter eller kjemiske produkter. - the metal container can be a hot water tank but can also be a winemaking vessel, a tank for transporting e.g. nutritional products or chemical products.
En andre oppfinnelsesgjenstand består av en innretning for overflatebehandling av en metallbeholder som fremviser minst en åpning, kjennetegnet ved at den omfatter et behandlingskammer utstyrt med minst ett samlekar, midler for å holde beholderen, sprøytemidler for å sprøyte en behandlingsoppløsning inn i kammeret og inne i beholderen, midler for å resirkulere oppløsningen mellom karet og sprøytemidlene, idet resirkuleringsmidlene omfatter en pumpe som er i stand til å forsyne sprøytemidlene ved et trykk over 8 bar. A second object of the invention consists of a device for surface treatment of a metal container which presents at least one opening, characterized in that it comprises a treatment chamber equipped with at least one collecting vessel, means for holding the container, spraying means for spraying a treatment solution into the chamber and inside the container , means for recirculating the solution between the vessel and the spraying agents, the recycling means comprising a pump capable of supplying the spraying agents at a pressure above 8 bar.
Til sist, består en tredje oppfinnelsesgjenstand av en linje for overflatebehandling av en metallbeholder som fremviser minst en åpning, kjennetegnet ved at den omfatter en innretning i samsvar med oppfinnelsen og videre omfatter et transportmiddel som forsyner innretningen med metallbeholderne. Finally, a third object of the invention consists of a line for the surface treatment of a metal container which presents at least one opening, characterized in that it comprises a device in accordance with the invention and further comprises a means of transport which supplies the device with the metal containers.
Innretningen i samsvar med oppfinnelsen kan også omfatte de følgende varianter, tatt isolert eller i kombinasjon: - den omfatter overvåkningsmidler som omfatter minst en målesonde, som særlig måler temperaturen, konsentrasjonen av H+ ioner eller redokspotensialet til behandlingsoppløsningen, idet disse midlene er installert ved hvilket som helst The device in accordance with the invention can also include the following variants, taken in isolation or in combination: - it includes monitoring means which comprise at least one measuring probe, which in particular measures the temperature, the concentration of H+ ions or the redox potential of the treatment solution, these means being installed at which preferably
punkt i resirkuleringskretsen som resirkulerer oppløsningen, point in the recirculation circuit that recirculates the solution,
- innretningen omfatter et system for ekstrahering og kondensering av syredamper. - the facility includes a system for extracting and condensing acid vapours.
Fremgangsmåten i samsvar med oppfinnelsen kan anvendes for hvilken som helst metalloverflate og særlig for støpejern, stål, stållegeringer, ferrolegeringer, nikkel og legeringer derav, for krom og legeringer derav, for titan og legeringer derav, for zirkonium og legeringer derav, og for kobber og legeringer derav. The method according to the invention can be used for any metal surface and in particular for cast iron, steel, steel alloys, ferroalloys, nickel and alloys thereof, for chromium and alloys thereof, for titanium and alloys thereof, for zirconium and alloys thereof, and for copper and alloys thereof.
Den er mere spesielt tiltenkt for behandlingen av beholdere som fremviser minst en åpning og som kan fremstilles ved hjelp av hvilken som helst metode for sammen-føyning av plater slik som f.eks. sveising, nagling, liming, stifting, hefting eller også ytterligere ved støping, trekking, ekstrudering, pregning, bøyning eller dreiing. It is more particularly intended for the treatment of containers which present at least one opening and which can be produced using any method of joining sheets such as e.g. welding, riveting, gluing, stapling, stapling or also further by casting, drawing, extruding, embossing, bending or turning.
De foreliggende oppfinnere har funnet at sprøyting av en dekaperingsoppløsning ved et trykk over 8 bar og foretrukket over 10 bar gjorde det mulig å oppnå dekaperingstider som var en faktor på minst 6 lavere enn metoder som involverer nedsenkning i tanker. The present inventors have found that spraying a pickling solution at a pressure above 8 bar and preferably above 10 bar made it possible to achieve pickling times which were a factor of at least 6 lower than methods involving immersion in tanks.
Uten ønske om å bindes av teori, menes det at sprøyting av dekaperingsoppløsningen lar belegget brytes opp og oppløsningen injiseres deretter inn i dets sprekker. Denne mekaniske virkningen kombineres med en kjemisk virkning gjennom en perkolering-kjemisk oppløsning-mekanisme. Without wishing to be bound by theory, it is believed that spraying the pickling solution allows the coating to break up and the solution is then injected into its crevices. This mechanical action is combined with a chemical action through a percolation-chemical dissolution mechanism.
For å unngå enhver risiko for å skade eller skjære opp metallbeholderen, f.eks. når beholderen er dannet av stål, er det imidlertid foretrukket å sprøyte dekaperings-oppløsningen ved et trykk lavere enn 90 bar. To avoid any risk of damaging or cutting the metal container, e.g. however, when the container is formed of steel, it is preferred to spray the pickling solution at a pressure lower than 90 bar.
Hastigheten som oppløsningen tilføres ved gjør det også mulig å redusere diffusjons-grenselaget ved å akselerere fornyelsen av syreoppløsning ved overflaten av beholderen. The rate at which the solution is supplied also makes it possible to reduce the diffusion boundary layer by accelerating the renewal of acid solution at the surface of the container.
Dessuten blir alle de skadelige dampene fanget og deretter kondensert, uten noen gang å forlate kammeret i gassform. Also, all the harmful vapors are captured and then condensed, without ever leaving the chamber in gaseous form.
Innretningen i samsvar med oppfinnelsen som vist i fig. 1 omfatter et kammer 1 som The device according to the invention as shown in fig. 1 comprises a chamber 1 which
kan forsegles med hensyn til gasser og væsker med hensyn til utsiden av innretningen. Installert i dette kammeret 1 er en montasjeplate (ikke vist) utstyrt med et samlekar 2 forbundet med en oppløsning for gjenvinning av en behandlingsoppløsning. Kammeret 1 omfatter også en nedre sprøytedyse 3 tiltenkt for behandling av den innvendige can be sealed with respect to gases and liquids with respect to the outside of the device. Installed in this chamber 1 is a mounting plate (not shown) equipped with a collection vessel 2 connected to a solution for recovering a treatment solution. The chamber 1 also includes a lower spray nozzle 3 intended for treating the interior
delen av en metallbeholder 4, sammen med en serie av dyser 5, 5', 5" ved den øvre delen av kammeret 1 og tiltenkt for å behandle den utvendige delen av beholderen 4. the part of a metal container 4, together with a series of nozzles 5, 5', 5" at the upper part of the chamber 1 and intended to treat the external part of the container 4.
Kammeret 1 kan videre omfatte et system (ikke vist) for ekstrahering og kondensering av syredamper, og et system for oppvarming av kammeret 1, med automatisk tempe-raturregulering. The chamber 1 can further comprise a system (not shown) for extracting and condensing acid vapours, and a system for heating the chamber 1, with automatic temperature regulation.
Det omfatter minst et samlekar 2, men kan inneholde så mange samlekar som der er forskjellige behandlingsoppløsninger, hvilket tillater at hver oppløsning samles i et spesifikt kar og letter derfor dens tilbakeføring og/eller dens sirkulering til kammeret. It comprises at least one collection vessel 2, but may contain as many collection vessels as there are different treatment solutions, allowing each solution to be collected in a specific vessel and therefore facilitating its return and/or its circulation to the chamber.
Det er også mulig å tilveiebringe midler for tilsetning av reagenser til dette kammeret 1, og følere 6, 6', 6" for overvåking av hvordan overflatebehandlingen skrider fremover. It is also possible to provide means for adding reagents to this chamber 1, and sensors 6, 6', 6" for monitoring how the surface treatment is progressing.
Disse følerne 6, 6', 6" kan være installert på forskjellige punkter i innretningen, og særlig i samlekaret 2 eller i kretsen for samling av oppløsningen som nettopp er blitt sprøytet under trykk, men kan også være installert bort fra kammeret 1, i en tank som oppløsningen fremstilles i. These sensors 6, 6', 6" can be installed at various points in the device, and in particular in the collection vessel 2 or in the circuit for collecting the solution that has just been sprayed under pressure, but can also be installed away from the chamber 1, in a tank in which the solution is prepared.
Spesielt er det mulig å anvende følere 6, 6', 6" som måler redokspotensialet, konsentrasjonen av H+, temperaturen, eller hvilken som helst annen føler som gjør det mulig å bestemme hvorvidt oppløsningen behøver å behandles før den anvendes. In particular, it is possible to use sensors 6, 6', 6" that measure the redox potential, the concentration of H+, the temperature, or any other sensor that makes it possible to determine whether the solution needs to be treated before it is used.
Denne innretningen er derfor tiltenkt for overflatebehandling av en metallbeholder 4 som omfatter minst en åpning 4'. Denne beholderen innføres i kammeret 1 og posisjo-neres på en slik måte at dens åpning 4' er rettet nedover. Den nedre sprøytedysen 3 føres via' åpningen 4' inn i beholderen 4, og deretter sprøytes en dekaperingsoppløs-ning ved et trykk over 8 bar og ved en temperatur på f.eks. mellom 40 og 70°C. This device is therefore intended for surface treatment of a metal container 4 which comprises at least one opening 4'. This container is introduced into the chamber 1 and positioned in such a way that its opening 4' is directed downwards. The lower spray nozzle 3 is fed via the 'opening 4' into the container 4, and then a pickling solution is sprayed at a pressure above 8 bar and at a temperature of e.g. between 40 and 70°C.
En dekaperingsoppløsning som kan anvendes i fremgangsmåten i samsvar med oppfinnelsen kan inneholde en mineralsyre eller en blanding av syrer omfattende en halogenforbindelse eller et sulfat-, ortofosfat- eller metafosfatradikal, eller også ytterligere en alifatisk eller cyklisk organisk syre eller blanding av syrer, slik som en peroksysyre slik som pereddiksyre, eller perborsyre. Denne oppløsningen kan også inneholde blandinger av syrer av forskjellige typer, slik som en blanding av f.eks. halogensyre og mineralsyre. A pickling solution that can be used in the method according to the invention can contain a mineral acid or a mixture of acids comprising a halogen compound or a sulphate, orthophosphate or metaphosphate radical, or also a further aliphatic or cyclic organic acid or mixture of acids, such as a peroxy acid such as peracetic acid, or perboric acid. This solution can also contain mixtures of acids of different types, such as a mixture of e.g. halogen acid and mineral acid.
Peroksysyren kan for øvrig oppnås in situ ved tilsetning av hydrogenperoksyd til en organisk syre. Anvendelsen av disse peroksysyrer er særlig fordelaktig fordi dekape-ringsoppløsninger inneholdende disse kan ødelegges ganske enkelt ved forbrenning uten å frigjøre giftige gasser. The peroxy acid can also be obtained in situ by adding hydrogen peroxide to an organic acid. The use of these peroxyacids is particularly advantageous because pickling solutions containing them can be destroyed simply by burning without releasing toxic gases.
Konsentrasjonen av syrer er foretrukket mellom 0,1 og 7 mol/l, og mere spesielt foretrukket mellom 0,1 og 6 mol/l, mens konsentrasjonen av metaller i oppløsningen foretrukket er mellom 0,2 og 2 mol/l. The concentration of acids is preferably between 0.1 and 7 mol/l, and more particularly preferably between 0.1 and 6 mol/l, while the concentration of metals in the solution is preferably between 0.2 and 2 mol/l.
Denne dekaperingsoppløsningen omfatter også en oksydert forbindelse som stammer fra metallet av hvilket beholderen skal behandles ved sin maksimale valens. Denne forbindelsen kan også innføres i dekaperingsoppløsningen ved oppløsning av et syntetisk salt i oppløsningen eller gjennom virkningen av hydrogenperoksyd, ozon eller persalter. This pickling solution also comprises an oxidized compound originating from the metal of which the container is to be treated at its maximum valence. This compound can also be introduced into the pickling solution by dissolving a synthetic salt in the solution or through the action of hydrogen peroxide, ozone or persalts.
Når ønsket er å dekapere, vil sammensetningen av oppløsningen generelt tilpasses til å passe med sammensetningen og beskaffenheten av oksydene som skal fjernes. When pickling is desired, the composition of the solution will generally be adapted to suit the composition and nature of the oxides to be removed.
Redokspotensialet vil velges slik at det er høyere enn oksydasjon-reduksjon-potensialet til redoksparet av hovedbestanddelen, i et molart forhold oksydasjonsmiddel/reduk-sjonsmiddel på 4 eller høyere, i det angjeldende medium. The redox potential will be chosen so that it is higher than the oxidation-reduction potential of the redox couple of the main component, in a molar ratio oxidizing agent/reducing agent of 4 or higher, in the relevant medium.
Temperaturen til oppløsningen er foretrukket mellom 40°C og 80°C, og er mer spesielt foretrukket av størrelsesorden 60°C, pluss eller minus 2°C. The temperature of the solution is preferably between 40°C and 80°C, and is more particularly preferred of the order of 60°C, plus or minus 2°C.
Raten som oppløsningen sprøytes ved reguleres på en slik måte at raten som kammeret tømmes ved balanseres. The rate at which the solution is sprayed is regulated in such a way that the rate at which the chamber is emptied is balanced.
Før eller etter denne dekaperingsoppløsningen sprøytes, kan beholderen skylles med f.eks. varme (60°C) eller kalde (15°C) vandige oppløsninger. Det er også mulig å utsette den for en passiveringsbehandling ved anvendelse av hydrogenperoksyd fortynnet i et syremedium, eller hvilken som helst annen oppløsning (persalter, etc). Before or after this pickling solution is sprayed, the container can be rinsed with e.g. hot (60°C) or cold (15°C) aqueous solutions. It is also possible to subject it to a passivation treatment using hydrogen peroxide diluted in an acid medium, or any other solution (persalts, etc).
Utførelse av fremgangsmåten i samsvar med oppfinnelsen gjør det mulig å oppnå en overraskende økning i produktivitet. Den innvendige dekaperingen av en 300 liter varmtvannstank tar således bare 10 minutter, i motsetning til 60 til 90 minutter påkrevet for en nedsekningsmetode. Carrying out the method in accordance with the invention makes it possible to achieve a surprising increase in productivity. The internal pickling of a 300 liter hot water tank thus only takes 10 minutes, in contrast to the 60 to 90 minutes required for an immersion method.
Claims (14)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0306744A FR2855773B1 (en) | 2003-06-04 | 2003-06-04 | METHOD FOR TREATING ECOLOGICAL SURFACE OF A METAL CONTAINER, ASSOCIATING CHEMICAL ACTION AND MECHANICAL ACTION |
| PCT/FR2004/001212 WO2004108309A1 (en) | 2003-06-04 | 2004-05-17 | Method for ecologically treating the surface of a metallic container, combining a chemical action and a mechanical action |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO20055761D0 NO20055761D0 (en) | 2005-12-05 |
| NO20055761L NO20055761L (en) | 2006-03-06 |
| NO329293B1 true NO329293B1 (en) | 2010-09-27 |
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| NO20055761A NO329293B1 (en) | 2003-06-04 | 2005-12-05 | Method, apparatus and line for the ecological treatment of the surface of a metal container by combining a chemical action and a mechanical action |
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| Country | Link |
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| EP (1) | EP1633499B1 (en) |
| AT (1) | ATE411119T1 (en) |
| DE (1) | DE602004017169D1 (en) |
| DK (1) | DK1633499T3 (en) |
| ES (1) | ES2313028T3 (en) |
| FR (1) | FR2855773B1 (en) |
| NO (1) | NO329293B1 (en) |
| PT (1) | PT1633499E (en) |
| SI (1) | SI1633499T1 (en) |
| WO (1) | WO2004108309A1 (en) |
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| GB0508933D0 (en) * | 2005-05-03 | 2005-06-08 | Stainless Restoration Ltd | Method and apparatus for treating internal surfaces(s) of a hollow vessel |
| ITTO20090514A1 (en) * | 2009-07-09 | 2011-01-10 | Biemmedue S P A | METHOD AND UNIT FOR WASHING A DAMIGIANA |
| CN101875052B (en) * | 2009-11-15 | 2012-05-02 | 内蒙古科技大学 | Draught beer barrel cleaner |
| CN103934248A (en) * | 2014-04-18 | 2014-07-23 | 江苏新美星包装机械股份有限公司 | Washing device in barrel washer |
| PL424914A1 (en) * | 2018-03-16 | 2019-09-23 | Walczak Ryszard Rotor Zakład Mechaniki Maszyn | Installation for enameling heating sheets of the rotary air and waste gases heaters |
| PL234800B1 (en) * | 2018-03-16 | 2020-04-30 | Walczak Ryszard Rotor Zakl Mechaniki Maszyn | Installation for enameling heating sheets of the rotary air and waste gases heaters |
| CN108672449A (en) * | 2018-06-22 | 2018-10-19 | 中核核电运行管理有限公司 | Cobalt isotope transports outward container and rinses environmental control system |
| CN110055544B (en) * | 2019-05-23 | 2023-06-16 | 宝武特冶航研科技有限公司 | Vertical steel pipe pickling tank |
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| BE1003233A4 (en) * | 1988-09-08 | 1992-02-04 | Sarl Beugin Ind | System for the treatment of a hollow body |
| FR2792855B3 (en) * | 1999-04-27 | 2001-05-25 | Pierre Langlois | A WINE TANK CLEANING METHOD AND DEVICE |
| US6341612B1 (en) * | 2000-03-09 | 2002-01-29 | Steris Inc | Two compartment container for neutralizing used cleaning solutions |
| DE10128843C1 (en) * | 2001-06-15 | 2002-12-19 | Ghc Gerling Holz & Co Handels | Cleaning method for interior of pressurised gas container uses pressurised water with pre-heating for heating gas container to 70 degrees |
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2003
- 2003-06-04 FR FR0306744A patent/FR2855773B1/en not_active Expired - Fee Related
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2004
- 2004-05-17 SI SI200430930T patent/SI1633499T1/en unknown
- 2004-05-17 AT AT04742760T patent/ATE411119T1/en active
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- 2004-05-17 WO PCT/FR2004/001212 patent/WO2004108309A1/en active Application Filing
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| Publication number | Publication date |
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| EP1633499A1 (en) | 2006-03-15 |
| PT1633499E (en) | 2008-12-02 |
| NO20055761D0 (en) | 2005-12-05 |
| DE602004017169D1 (en) | 2008-11-27 |
| WO2004108309A1 (en) | 2004-12-16 |
| FR2855773B1 (en) | 2005-07-15 |
| SI1633499T1 (en) | 2009-02-28 |
| FR2855773A1 (en) | 2004-12-10 |
| EP1633499B1 (en) | 2008-10-15 |
| ES2313028T3 (en) | 2009-03-01 |
| ATE411119T1 (en) | 2008-10-15 |
| DK1633499T3 (en) | 2009-01-05 |
| NO20055761L (en) | 2006-03-06 |
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