EP0098811B1 - Verfahren zur Dekontamination von mit Polychlorbiphenyl verunreinigter Elektro-Mechanikvorrichtung - Google Patents

Verfahren zur Dekontamination von mit Polychlorbiphenyl verunreinigter Elektro-Mechanikvorrichtung Download PDF

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Publication number
EP0098811B1
EP0098811B1 EP83830130A EP83830130A EP0098811B1 EP 0098811 B1 EP0098811 B1 EP 0098811B1 EP 83830130 A EP83830130 A EP 83830130A EP 83830130 A EP83830130 A EP 83830130A EP 0098811 B1 EP0098811 B1 EP 0098811B1
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EP
European Patent Office
Prior art keywords
solvent
vapours
temperature
sealed chamber
pcb
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
Application number
EP83830130A
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English (en)
French (fr)
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EP0098811B2 (de
EP0098811A1 (de
Inventor
Aurelio Colombini
Mario Coppo
Vittorio Colombini
Enrico Colombo
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Srl SIREA
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Srl SIREA
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Publication date
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Application filed by Srl SIREA filed Critical Srl SIREA
Priority to AT83830130T priority Critical patent/ATE22808T1/de
Publication of EP0098811A1 publication Critical patent/EP0098811A1/de
Application granted granted Critical
Publication of EP0098811B1 publication Critical patent/EP0098811B1/de
Publication of EP0098811B2 publication Critical patent/EP0098811B2/de
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    • 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 in a sealed chamber.
  • the solvent vapours are generated by heating means and condensed at the top of the sealed chamer so as to perform a reflux washing of the apparatus.
  • the solvent vapours are generated outside the sealed chamber and then injected therein to wash the apparatus.
  • the solvent is non-toxic and also compatible with the apparatus materials and has a distillation temperature lower than that of PCB.
  • 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 trichioro- ethane 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 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 0 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 thereby developing their flooding action according to the plot of Fig. 4, where 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 eptane 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 to vapour condensation temperature T1, the latter is increased of a step ⁇ T, 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 exceed 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 solvent.
  • the described embodiment shows a washing method with solvent reflux
  • the same method could be carried out without the top condenser, or it could be otherwise carried out by providing outside the box B a solvent vapour source and then injecting the solvent vapours into the box B 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 penetration, 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 is 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, asthis can be recovered by taking advantage of the heat supplied by the heaters by simply evacuating the box once the washing is ended and the PCB has been separated therefrom.
  • the so decontaminated apparatus can then be recovered and reused by substituting forthe 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)
  • Organic Insulating Materials (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Extraction Or Liquid Replacement (AREA)

Claims (8)

1. Verfahren zur Dekontamination von mit Polychlorbiphenyl verunreinigten Elektro-Mechanikvorrichtungen unter Verwendung eines Lösungsmittels für Polychlorbiphenyl, das diesem gegenüber chemisch inert ist, dadurch gekennzeichnet, daß man
die zu dekontaminierende Vorrichtung in einer abgedichteten Kammer in Lösungsmitteldämpfen eingetaucht hält, und
den Druck und die Temperatur der Lösungsmitteldämpfe kontrolliert, um ständig eine Kondensierung der Lösungsmitteldämpfe auf den in Behandlung befindlichen Oberflächen zu ermöglichen.
2. Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, daß die Lösungsmitteldämpfe in der abgedichteten Kammer durch zugeordnete Heizmittel erzeugt werden.
3. Verfahren nach Patentanspruch 2, dadurch gekennzeichnet, daß die Lösungsmitteldämpfe. durch Heizmittel erzeugt und oben in der abgedichteten Kammer kondensiert werden, um eine Rückflußwäsche der Vorrichtung durchzuführen.
4. Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, daß die Lösungsmitteldämpfe außerhalb der abgedichteten Kammer erzeugt und dann zum Waschen der Vorrichtung in dieselbe eingespritzt werden.
5. Verfahren nach einem der Patentansprüche 1-4, dadurch gekennzeichnet, daß das Lösungsmittel atoxisch und auch mit den Vorrichtungsmaterialien verträglich ist sowie eine niedrigere Destillationstemperatur als PCB hat.
6. Verfahren nach einem der Patentansprüche 1-4, dadurch gekennzeichnet, daß die Destillationstemperaturvon dem Lösungsmittel niedriger als die von der zu dekontaminierenden Vorrichtung verträglichen Höchsttemperatur und höher als die Raumtemperatur für dessen Handhabungs-und Aufbewahrungserleichterung ist.
7. Verfahren nach einem der vorausgehenden Patentansprüche, dadurch gekennzeichnet, daß als Lösungsmittel dearomatisiertes Heptan oder Trichloräthan verwendet wird.
8. Verfahren nach einem der vorausgehenden Patentansprüche, dadurch gekennzeichnet, daß die Temperatur der Lösungsmitteldämpfe in Abhängigkeit der Durchschnittstemperatur der zu dekontaminierenden Vorrichtung stufenweise erhöht wird.
EP83830130A 1982-07-02 1983-06-23 Verfahren zur Dekontamination von mit Polychlorbiphenyl verunreinigter Elektro-Mechanikvorrichtung Expired - Lifetime EP0098811B2 (de)

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

Publications (3)

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

Family

ID=11193047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83830130A Expired - Lifetime EP0098811B2 (de) 1982-07-02 1983-06-23 Verfahren zur Dekontamination von mit Polychlorbiphenyl verunreinigter Elektro-Mechanikvorrichtung

Country Status (4)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4128699A1 (de) * 1991-08-29 1993-03-04 Peter Warthmann Verfahren und vorrichtung zum entfetten und reinigen von behandlungsgut mit hilfe von loesungsmitteln
DE19515566A1 (de) * 1995-03-16 1996-10-31 Chugai Ro Kogyo Kaisha Ltd Reinigungsgerät

Families Citing this family (14)

* 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
DE3740067A1 (de) * 1986-11-29 1988-07-28 Bbc Brown Boveri & Cie Reinigungsverfahren fuer ein elektrisches isolierteil
DE3861050D1 (de) * 1987-05-07 1990-12-20 Micafil Ag Verfahren und vorrichtung zum extrahieren von oel oder polychloriertem biphenyl aus impraegnierten elektrischen teilen mittels eines loesungsmittels sowie destillation des loesungsmittels.
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 (de) * 1988-10-31 1990-12-14 Asea Brown Boveri
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4128699A1 (de) * 1991-08-29 1993-03-04 Peter Warthmann Verfahren und vorrichtung zum entfetten und reinigen von behandlungsgut mit hilfe von loesungsmitteln
DE19515566A1 (de) * 1995-03-16 1996-10-31 Chugai Ro Kogyo Kaisha Ltd Reinigungsgerät
DE19515566C2 (de) * 1995-03-16 1998-10-08 Chugai Ro Kogyo Kaisha Ltd Reinigungsgerät

Also Published As

Publication number Publication date
EP0098811B2 (de) 1990-06-13
IT8222207A0 (it) 1982-07-02
ATE22808T1 (de) 1986-11-15
EP0098811A1 (de) 1984-01-18
IT1157287B (it) 1987-02-11
DE3366842D1 (en) 1986-11-20

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