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EP0098811B2 - Procédé pour désinfecter les dispositifs électro-mécaniques de polychlorobiphényl - Google Patents
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EP0098811B2 - Procédé pour désinfecter les dispositifs électro-mécaniques de polychlorobiphényl - Google Patents

Procédé pour désinfecter les dispositifs électro-mécaniques de polychlorobiphényl Download PDF

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Publication number
EP0098811B2
EP0098811B2 EP83830130A EP83830130A EP0098811B2 EP 0098811 B2 EP0098811 B2 EP 0098811B2 EP 83830130 A EP83830130 A EP 83830130A EP 83830130 A EP83830130 A EP 83830130A EP 0098811 B2 EP0098811 B2 EP 0098811B2
Authority
EP
European Patent Office
Prior art keywords
solvent
vapours
temperature
polychlorobiphenyl
sealed chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP83830130A
Other languages
German (de)
English (en)
Other versions
EP0098811A1 (fr
EP0098811B1 (fr
Inventor
Aurelio Colombini
Mario Coppo
Vittorio Colombini
Enrico Colombo
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.)
Srl SIREA
Original Assignee
DECOMAN Srl
Srl SIREA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11193047&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0098811(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by DECOMAN Srl, Srl SIREA filed Critical DECOMAN Srl
Priority to AT83830130T priority Critical patent/ATE22808T1/de
Publication of EP0098811A1 publication Critical patent/EP0098811A1/fr
Application granted granted Critical
Publication of EP0098811B1 publication Critical patent/EP0098811B1/fr
Publication of EP0098811B2 publication Critical patent/EP0098811B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
    • C10G21/006—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents of waste oils, e.g. PCB's containing oils

Definitions

  • the present invention generally relates to a method of decontaminating from polychlorobiphenyl electro-mechanic apparatus.
  • PCB polychlorobiphenyl
  • the PCB absorbed by materials such as paper and wood which are normally present in most apparatus and the PCB adsorbed by the inner portion of the magnetic lamination pack or the electric windings cannot be totally removed, at least in a short time, because of its aggressiveness and therefore a portion thereof remains attached to these apparatus so that, with the passing of time, it can be dissolved in the new liquid used in substitution thereof, thereby forming a contaminating element for the latter.
  • US-A-4,008,729 discloses an apparatus for cleaning articles in volatile solvent wherein the article to be cleaned is placed in a container connected to a solvent collector with siphon and provided with a condenser.
  • the solvent in the container is heated to boiling temperature to generate solvent vapours to bathe the article in solvent vapours and condensate which forms on the condenser and drips into the container to wash impurities from the article.
  • the article to be cleaned is immersed in the liquid solvent up to the level of the siphon tube extending in the container and therefore the solvent vapours are not in contact with all the article, but only with the portion thereof emerging from the siphon level. Furthermore this treatment is carried out at atmospheric pressure.
  • the solvent vapours are generated by heating means.
  • the solvent vapours are generated in the sealed chamber by associated heating means.
  • the solvent vapours are generated outside the sealed chamber and then injected therein to wash the apparatus.
  • the solvent is preferably non-toxic and is also compatible with the apparatus materials.
  • the distillation temperature of the solvent is lower than the maximum temperature tolerable by the apparatus to be decontaminated and higher than the room temperature for handling and conservation facility thereof.
  • dearomated heptane or trichloromethane is employed as solvent.
  • the temperature of the solvent vapours is increased stepwise as a function of the average temperature of the apparatus to be decontaminated.
  • the temperature is controlled by a thermostat controlling a valve which controls the flow of a heationg fluid through the side walls of the chamber.
  • the apparatus under treatment is put in a box B which is heated on the bottom and on the four lateral walls by means of jackets E through which a suitable heating fluid passes, which is fed through an inlet G, through a valve I and is discharged through an outlet H.
  • a condenser L is arranged through which water flows, the temperature of which is controlled by a thermostat M controlling a water discharge valve N.
  • the temperature is controlled by a thermostat F controlling the valve I and the pressure is controlled by a vacuostat O controlling a solvent discharge valve P, everything so as to keep constantly the apparatus A submerged in the solvent vapours under vacuum and to cause the solvent vapours to be always condensed on the walls thereof and to flow downwardly thereon therby developing their flooding action according to the plot of Fig. 4, wherein T1 designates the vapour condensation temperature and T2 designates the average temperature of the apparatus A under treatment.
  • the solvent used in this case is dearomated heptane which exhibits all of the above mentioned features for performing the washing operation.
  • the temperature T1 is stepwise controlled as a function of the temperature T2 taken over by the apparatus A, i.e. as the temperature T2 of the apparatus A approaches the vapour condensation temperature T1, the latter is increased of a step AT, and this operation is repeated until the washing is ended.
  • the box B is further provided with a solvent inlet S, a thermometer V for measuring the solvent vapour temperature and an inert gas source R connected to the box through a valve Z, a non-return safety valve Q calibrated so as to assure that the pressure inside the box B does not excceed the safety values and a drainage tube D for the gravity discharge of the polychlorobiphenyl.
  • the inert gas source R during the solvent discharge operation is connected to the box B in order to avoid the air to enter therein, which could give rise to possible combustion of the hot solution.
  • the method could be carried out by providing outside the box B a solvent vapour source and then injecting the solvent vapours into the box D following the requirements for performing the washing operation.
  • Figs. 2 and 3 diagrammatically show the action of the solvent on the PCB during a liquid phase washing operation and during a vapour phase washing operation, respectively.
  • the area A is static and therefore there is a poor solvent substitution which when it is saturated, stops its penentration, whereas in Fig. 3 there is a continuous solvent substitution with resulting higher penetrability into the components of the apparatus to be decontaminated.
  • an automatic washing without the intervention of operators in contact with the PCB occurs.
  • all the necessary equipment does not come into contact with PCB and, once the washing operation is ended, it is fully cleaned and decontaminated, with the exception of the lower PCB collecting zone.
  • any possibility of environmental contamination is avoided since the system does not provide circuits for the PCB containing solvent (pumps, pipes, connectors, etc.), which could give rise to contamination problems.
  • the washing efficiency in very good since the solvent retains always its dissolving capacity without ever reaching the saturation and moreover the solvent can completely penetrate within interstices also of capillary nature.
  • Another advantage of this invention is the very low amount of solvent required for the decontamination and easy recovery thereof since it is sufficient an amount less than 1% of the amount required for carrying out the liquid phase washing, which results in a lower cost of solvent recovery, as this can be recovered by taking advantage of the heat supplied by the heaters by simply evacuating the box once the washing is ended and in the PCB has been separated therefrom.
  • the so decontaminated apparatus can then be recovered and reused by substituting for the PCB a usual oil or a silicone oil or a liquid usually employed to this end.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Organic Insulating Materials (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Claims (9)

1. Procédé pour désinfecter un dispositif électro-mécanique de polychlorbiphényl en utilisant un solvant du polychlorobiphényl, qui est chimiquement inerte à celui-ci et qui a une température de distillation inférieure à celle du polychlorobiphényl, caractérisé en ce qu'on
introduit le dispositif à désinfecter dans une chambre;
maintient le dispositif sous vide submergé dans les vapeurs dudit solvant dans la chambre étanche;
contrôle la pression et la température des vapeurs du solvant de façon à permettre toujours une condensation des vapeurs du solvant sur les surfaces en traitement, les vapeurs du solvant étant aussi condensées au sommet de la chambre étanche pour effecteur un lavage à réflux du dispositif.
2. Procédé selon la revendication 1, caractérisé en ce que les vapeurs du solvant engendrées par des moyens de chauffage.
3. Procédé selon la revendication 2, caractérisé en ce que les vapeurs du solvant sont engendrées dans la chambre étanche par des moyens de chauffages associés.
4. Procédé selon la revendication 1 ou 2, caractérisé en ce que les vapeurs du solvant sont engendrées au dehors de la chambre étanche et ensuite injectées dans la même pour laver le dispositif.
5. Procédé selon l'une des revendications 1-4, caractérisé en ce que le solvant est atoxique et aussi compatible avec les matériaux du dispositif.
6. Procédé selon l'une des revendications 1-5, caractérisé en ce que la température de distillation du solvant est inférieure à la température maximum tolérable par le dispositif à désinfecter et supérieure à la temperature ambiante pour la facilité de manipulation et de conservation de celui-ci.
7. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'on emploit comme solvant de l'heptane déaromatisé ou du trichlo- roéthane.
8. Procédé selon l'une des revendications précédentes, caractérisé en ce que la température de vapeurs du solvant est augmentée par echélons en fonction de la température moyenne du dispositif à désinfecter.
9. Procédé selon l'une des revendications précédentes, caractérisé en ce que la température à l'intérieure de la chambre est contrôlée par un thermostat, qui commande une soupape contrôlant l'écoulement d'un liquide de chauffage à travers les parois latérales de la chambre.
EP83830130A 1982-07-02 1983-06-23 Procédé pour désinfecter les dispositifs électro-mécaniques de polychlorobiphényl Expired - Lifetime EP0098811B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83830130T ATE22808T1 (de) 1982-07-02 1983-06-23 Verfahren zur dekontamination von mit polychlorbiphenyl verunreinigter elektromechanikvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2220782 1982-07-02
IT22207/82A IT1157287B (it) 1982-07-02 1982-07-02 Procedimento per il disinquinamento di apparecchiature elettriche-meccaniche da poli-cloro-difenile

Publications (3)

Publication Number Publication Date
EP0098811A1 EP0098811A1 (fr) 1984-01-18
EP0098811B1 EP0098811B1 (fr) 1986-10-15
EP0098811B2 true EP0098811B2 (fr) 1990-06-13

Family

ID=11193047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83830130A Expired - Lifetime EP0098811B2 (fr) 1982-07-02 1983-06-23 Procédé pour désinfecter les dispositifs électro-mécaniques de polychlorobiphényl

Country Status (4)

Country Link
EP (1) EP0098811B2 (fr)
AT (1) ATE22808T1 (fr)
DE (1) DE3366842D1 (fr)
IT (1) IT1157287B (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1190411B (it) * 1985-10-24 1988-02-16 Ecolsir Srl Procedimento per il disinquinamento di apparecchiature o altri materiali contaminati con pcb o altre sostanze tossiche e nocive
DE3540425A1 (de) * 1985-11-14 1987-05-21 Transformatoren Union Ag Verfahren zur dekontaminierung von transformatoren
EP0270928B1 (fr) * 1986-11-29 1992-01-15 Asea Brown Boveri Aktiengesellschaft Procédé de nettoyage pour un élément isolant
DE3714312A1 (de) * 1987-04-29 1988-11-10 Siemens Ag Verfahren und einrichtung zum reinigen von elektrischen geraeten mit einem isolieroel in einem behaelter
DE3715235A1 (de) * 1987-05-07 1988-11-24 Micafil Ag Verfahren und vorrichtung zum extrahieren von oel oder polychloriertem biphenyl aus impraegnierten elektrischen teilen mittels eines loesungsmittels sowie zur destillation des loesungsmittels
US4879004A (en) * 1987-05-07 1989-11-07 Micafil Ag Process for the extraction of oil or polychlorinated biphenyl from electrical parts through the use of solvents and for distillation of the solvents
FR2615763A2 (fr) * 1987-05-27 1988-12-02 Pioch Rene Amelioration au nettoyage d'appareils complexes enfermes dans une cuve par des vibrations orientees
FR2617724B1 (fr) * 1987-07-06 1989-11-24 Vigneron Andre Procede de decontamination des appareils electriques renfermant des residus de polychlorobiphenyls et dispositif de decontamination
FR2626582B1 (fr) * 1988-02-03 1990-06-22 Sepulcre Patrick Procede de regeneration d'huiles minerales et de fluides dielectriques au silicone souilles par des polychlorobiphenyls et dispositif de decontamination
FR2634674B1 (fr) * 1988-08-01 1991-02-22 Sepulcre Patrick Procede de revalorisation des composants d'appareils electriques renfermant des residus de polychlorobiphenyles et dispositifs de traitement
CH676084A5 (fr) * 1988-10-31 1990-12-14 Asea Brown Boveri
DE4128699A1 (de) * 1991-08-29 1993-03-04 Peter Warthmann Verfahren und vorrichtung zum entfetten und reinigen von behandlungsgut mit hilfe von loesungsmitteln
JP2742238B2 (ja) * 1995-03-16 1998-04-22 中外炉工業株式会社 有機溶剤を使用する洗浄装置
CN1080147C (zh) * 1995-04-27 2002-03-06 中外炉工业株式会社 清洁装置
FR2961722B1 (fr) 2010-06-29 2013-02-22 Aprochim Procede et dispositif pour la decontamination de materiaux pollues
ITMI20120073A1 (it) * 2012-01-24 2013-07-25 D E L Co S R L Procedimento e relativo impianto per la decontaminazione sicura e veloce di materiali porosi e non contaminati da pcb
CN103272797B (zh) * 2013-05-31 2016-08-31 陈春 工件清洗方法及装置
JP6373331B2 (ja) * 2016-11-24 2018-08-15 株式会社シー・シー・アイ 真空脱脂洗浄装置、及びその洗浄方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008729A (en) * 1972-07-28 1977-02-22 George Chizinsky Solvent article cleaner
US4023983A (en) * 1975-10-28 1977-05-17 Collins Machinery Corporation Vapor cleaning system

Also Published As

Publication number Publication date
DE3366842D1 (en) 1986-11-20
EP0098811A1 (fr) 1984-01-18
EP0098811B1 (fr) 1986-10-15
ATE22808T1 (de) 1986-11-15
IT8222207A0 (it) 1982-07-02
IT1157287B (it) 1987-02-11

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