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WO1994002209A1 - Procede et dispositif de nettoyage d'appareils electriques contamines avec du biphenylene surchlore - Google Patents

Procede et dispositif de nettoyage d'appareils electriques contamines avec du biphenylene surchlore Download PDF

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Publication number
WO1994002209A1
WO1994002209A1 PCT/EP1993/001873 EP9301873W WO9402209A1 WO 1994002209 A1 WO1994002209 A1 WO 1994002209A1 EP 9301873 W EP9301873 W EP 9301873W WO 9402209 A1 WO9402209 A1 WO 9402209A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
circuit
evaporator
line
distillation
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.)
Ceased
Application number
PCT/EP1993/001873
Other languages
German (de)
English (en)
Inventor
Gerhard Kemmler
Walter Anspach
Klaus Porsche
Lothar HÖHN
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.)
Nukem GmbH
Original Assignee
Nukem GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nukem GmbH filed Critical Nukem GmbH
Priority to AU45698/93A priority Critical patent/AU4569893A/en
Priority to EP93915932A priority patent/EP0649328A1/fr
Publication of WO1994002209A1 publication Critical patent/WO1994002209A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/06—Evaporators with vertical tubes
    • B01D1/12—Evaporators with vertical tubes and forced circulation
    • 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
    • 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
    • C10G7/00—Distillation of hydrocarbon oils
    • C10G7/006—Distillation of hydrocarbon oils of waste oils other than lubricating oils, e.g. PCB's containing oils

Definitions

  • the invention relates to a device for cleaning, in particular PCB-contaminated, fluid-filled devices, such as transformers, comprising a circuit containing the electrical device, in which a fluid-conveying conveying unit and a mixing device are arranged, in which a top stream flows with a the circuit can be mixed with fluid via a line connected distillation device.
  • PCBs have been used as an insulating and dielectric fluid for electrical devices such as transformers. In the late 1960s and early 1970s, however, PCBs were found to be environmentally hazardous, so that further use was avoided. However, since a large number of electrical devices that were filled with PCBs were already in operation at the time, options had to be found on the one hand to dispose of the cooling liquids present in the devices and on the other hand to free the devices themselves from PCBs. In order to be able to designate corresponding devices previously filled with PCBs as PCB-free, according to the legal provisions of some countries, it is necessary that the newly filled or cleaned fluid after the reclassification has a PCB content of less after 6 months contains than 50 mg / kg. In order to achieve this, complex procedural measures and devices are known which generally make it necessary for the electrical device itself to be out of operation during the cleaning or reclassification process. It is also often necessary for monitoring to take place during cleaning itself.
  • the object of the present invention is to develop a method and a device of the type described at the outset so that, with a compact structure, reliable decontamination or reclassification of electrical devices is possible, the electrical device itself continuing during the cleaning process can be operated. It should also not be necessary for the electrical device and the device itself to be continuously monitored during cleaning. Finally, it should be ensured that foaming or delay in boiling of the fluid is prevented and possible decomposition of PCB and, for example, perchlorethylene by local overheating is avoided.
  • the heating is preferably carried out peripherally in the annular space, the required heating can also take place on the inner boundary or by heating elements extending within the annular space.
  • the displacer On the bottom side, the displacer also has a beveled edge that points outwards.
  • the fluid itself is led into the bottom area of the evaporator via a line starting from the circuit.
  • the base can have a connection piece in which the line leading to the circuit and on the other hand a connecting line leads to a tank in which substances drawn off from the bottom of the evaporator are taken up.
  • Another proposal of the invention provides that in the rectification column another line emanating from the circuit opens, which is connected in parallel to the line leading to the bottom of the evaporator and flows via the fluids to the rectifier via an evaporator device arranged in the line.
  • Fig. 4 shows a section of a rectification column.
  • the liquid present in the transformer (10) is first drained off and then filled with a solvent such as Trans Clene ® , which contains perchlorethylene as the main constituent.
  • a solvent such as Trans Clene ® , which contains perchlorethylene as the main constituent.
  • the liquid level in the transformer (10) is indicated by the wavy line (12).
  • a riser pipe (46) extends from the mixer-condenser device (22) and is connected via a line section (48) to the transformer (10) above the liquid level (12), that is to say it is kept depressurized.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Un procédé et un dispositif permettent de nettoyer des appareils électriques (10), tels que des transformateurs, remplis d'un fluide et contaminés notamment avec du biphénylène surchloré. Le dispositif comprend un circuit (14) d'écoulement du fluide, un distillateur (34) qui nettoie le fluide, un mélangeur (22), dans lequel un courant de tête en provenance du distillateur est mélangé avec le fluide circulant dans le circuit d'écoulement et retournant vers le dispositif électrique, et une pompe de circulation (26) situé dans le circuit d'écoulement. Afin d'obtenir une décontamination ou une reclassification fiable avec un dispositif à structure compacte, le fluide à nettoyer est amené au distillateur (34) dans le fond ou près du fond d'un évaporateur (68) et s'écoule dans l'évaporateur à travers un espace annulaire extérieur et à travers un espace intérieur séparé de l'espace annulaire extérieur,le fluide étant chauffé et au moins partiellement évaporé dans ledit espace annulaire.
PCT/EP1993/001873 1992-07-17 1993-07-16 Procede et dispositif de nettoyage d'appareils electriques contamines avec du biphenylene surchlore Ceased WO1994002209A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU45698/93A AU4569893A (en) 1992-07-17 1993-07-16 Process and device for cleaning pcb-contaminated electric appliances
EP93915932A EP0649328A1 (fr) 1992-07-17 1993-07-16 Procede et dispositif de nettoyage d'appareils electriques contamines avec du biphenylene surchlore

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG9209587.9U 1992-07-17
DE9209587U DE9209587U1 (de) 1992-07-17 1992-07-17 Vorrichtung zum Reinigen von mit PCB kontaminierten elektrischen Geräten

Publications (1)

Publication Number Publication Date
WO1994002209A1 true WO1994002209A1 (fr) 1994-02-03

Family

ID=6881705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/001873 Ceased WO1994002209A1 (fr) 1992-07-17 1993-07-16 Procede et dispositif de nettoyage d'appareils electriques contamines avec du biphenylene surchlore

Country Status (4)

Country Link
EP (1) EP0649328A1 (fr)
AU (1) AU4569893A (fr)
DE (1) DE9209587U1 (fr)
WO (1) WO1994002209A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034586B (de) * 1952-09-13 1958-07-24 Baelz & Sohn K G W Regelanordnung zur Aufrechterhaltung einer bestimmten Fluessigkeitshoehe im Sumpf einer Trennkolonne
US4230536A (en) * 1979-02-05 1980-10-28 Sech Charles E Method for the distillation purification of organic heat transfer fluids
DE3540291A1 (de) * 1985-11-13 1987-05-14 Quadrex Hps Inc Verfahren und vorrichtung zum entfernen von polychlorbiphenylen von elektrischen vorrichtungen
WO1988000849A1 (fr) * 1986-08-01 1988-02-11 R E I Technologies, Inc. Reclassification d'appareils electriques contamines par pcb

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3401866C2 (de) * 1984-01-20 1986-10-09 Didier-Werke Ag, 6200 Wiesbaden Verfahren zur Langzeitentfernung von chlorierten Biphenylen (PCB) aus Transformatorisolierflüssigkeiten
US4857150A (en) * 1988-06-22 1989-08-15 Union Carbide Corporation Silicone oil recovery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034586B (de) * 1952-09-13 1958-07-24 Baelz & Sohn K G W Regelanordnung zur Aufrechterhaltung einer bestimmten Fluessigkeitshoehe im Sumpf einer Trennkolonne
US4230536A (en) * 1979-02-05 1980-10-28 Sech Charles E Method for the distillation purification of organic heat transfer fluids
DE3540291A1 (de) * 1985-11-13 1987-05-14 Quadrex Hps Inc Verfahren und vorrichtung zum entfernen von polychlorbiphenylen von elektrischen vorrichtungen
WO1988000849A1 (fr) * 1986-08-01 1988-02-11 R E I Technologies, Inc. Reclassification d'appareils electriques contamines par pcb

Also Published As

Publication number Publication date
DE9209587U1 (de) 1993-11-18
EP0649328A1 (fr) 1995-04-26
AU4569893A (en) 1994-02-14

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