WO1995035147A1 - Traitement de contaminants - Google Patents

Traitement de contaminants Download PDF

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Publication number
WO1995035147A1
WO1995035147A1 PCT/AU1995/000355 AU9500355W WO9535147A1 WO 1995035147 A1 WO1995035147 A1 WO 1995035147A1 AU 9500355 W AU9500355 W AU 9500355W WO 9535147 A1 WO9535147 A1 WO 9535147A1
Authority
WO
WIPO (PCT)
Prior art keywords
condenser
solvent
retort
solids
condensate
Prior art date
Application number
PCT/AU1995/000355
Other languages
English (en)
Inventor
Straun Glen Robertson
Peter Clargo Stone
Original Assignee
Tox Free Systems Limited
Tox Free Systems, Inc.
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 Tox Free Systems Limited, Tox Free Systems, Inc. filed Critical Tox Free Systems Limited
Priority to AU27069/95A priority Critical patent/AU2706995A/en
Publication of WO1995035147A1 publication Critical patent/WO1995035147A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/10—Conditioning the gas to be cleaned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/73—After-treatment of removed components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/06—Reclamation of contaminated soil thermally

Definitions

  • the "off-gas" may be directed from the gas passage 29 to a secondary burner 40 which is used to preheat and/or dry the incoming soil feed before or as it passes along the soil feed pipe 20.
  • the desorption of the contaminants from the soil may be assisted/accelerated by the pumping, of stripping gas 43 into the retort 10; and by the application of a pressure or partial vacuum in the retort 10 by a pump 44.
  • the retort 110 is enclosed in the combustion chamber 131 for direct heat transfer to the retort 110.
  • the present invention is particularly related to the treatment of the waste components extracted as a result of the process described above.
  • one or more of the waste components may be volatilised depending on the operating conditions and the form and concentration of the waste components.
  • the contaminated components can be transferred to a condenser of the direct or indirect type.
  • the contaminants being transferred to the condenser will contain moisture (which may be in the form of vapour) and often solid particles arising from the condensation of volatilised components or from carry over.
  • the subsequent treatment of the condensate can cause problems depending essentially upon the contaminants being handled.
  • Contaminants containing DDT can provide additional problems.
  • DDT can be found in soils which have contained cattle dips.
  • contaminants found in soils in this application may further include arsenic and other pesticides.
  • DDT is one example of a contaminant which can turn to a solid when condensed and in addition may coat the condenser.
  • the portion of the arsenic which is volatilised during the treatment is also condensed to form a solid. It will be appreciated that the formation of the solids and the coating of the condenser can cause serious problems in the treatment of these contaminants.
  • apparatus for treating a gaseous mixture which may contain some solids, moisture and/or carryover containing contaminants including condenser means and concentrater means downstream of the condenser means for receiving the condensate and concentrating or separating it.
  • the condenser wash may include a solvent.
  • Incondensibles such as other contaminants that cannot be condensed and solids not removed from the gas stream in the condenser, can be discharged from the condenser via line 200 for treatment or destruction such as by incinerations, scrubbing, carbon absorption or the like.
  • the condensate collected in the condenser drum 102 can be transferred to a filter 104, or other separating means such as a centrifuge, gravity settler by way of example, where further particulate matter can be collected.
  • a filter 104 or other separating means such as a centrifuge, gravity settler by way of example, where further particulate matter can be collected.
  • This solid DDT may coat on the condenser or report to the condensate.
  • DDT is slightly soluble in water which usually forms the bulk of the condensate.
  • the portion of the arsenic which is volatilised is also condensed to form a solid.
  • a possible treatment to produce a DDT concentrate suitable for plasma destruction may include:
  • This treatment may require solvent extraction or distillation to concentrate the PCBs for plasma or other means of destruction.
  • Solids may also be present in either liquid phase if carried over from the retort.
  • Case 3 Timber Treatment Site Soils

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne un procédé et un appareil pour traiter un mélange gazeux qui peut contenir un peu de matières solides, de l'humidité et/ou des contaminants entraînés. Le procédé consiste à condenser le mélange gazeux, puis à concentrer le condensat pour ensuite le traiter, le recueillir et/ou le détruire. Une opération de filtration préalable peut intervenir avant l'étape de condensation.
PCT/AU1995/000355 1994-06-17 1995-06-16 Traitement de contaminants WO1995035147A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU27069/95A AU2706995A (en) 1994-06-17 1995-06-16 Treatment of contaminants

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPM6299A AUPM629994A0 (en) 1994-06-17 1994-06-17 Treatment of contaminants
AUPM6299 1994-06-17

Publications (1)

Publication Number Publication Date
WO1995035147A1 true WO1995035147A1 (fr) 1995-12-28

Family

ID=3780868

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1995/000355 WO1995035147A1 (fr) 1994-06-17 1995-06-16 Traitement de contaminants

Country Status (2)

Country Link
AU (1) AUPM629994A0 (fr)
WO (1) WO1995035147A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551988A1 (fr) * 1983-09-19 1985-03-22 Rousselle Sarl Frank Procede de regeneration des solvants de nettoyage et installation de mise en oeuvre du procede
DE3520885A1 (de) * 1985-06-11 1986-12-11 Kurt von Dipl.-Chem. Dr.rer.nat. 8170 Bad Tölz Beckerath Verfahren und anlage zur weitgehenden restentfernung von schadstoffen aus abgasen von verbrennungsanlagen
DE3706684A1 (de) * 1986-04-08 1987-10-15 Kurt Von Dipl Chem D Beckerath Verfahren zur entfernung von fluechtigen schadstoffen aus kontaminierten boeden, sanden, schlaemmen und vergleichbaren feststoffaggregaten und rueckstaenden
DE3639779A1 (de) * 1986-11-21 1988-06-01 Linde Ag Verfahren zur gewinnung von co(pfeil abwaerts)2(pfeil abwaerts) aus einem co(pfeil abwaerts)2(pfeil abwaerts)-reichen erdgas
US4834841A (en) * 1987-10-01 1989-05-30 Peck Kenneth W Method for treating baking oven stack gases
WO1989010174A1 (fr) * 1988-04-29 1989-11-02 Huhtamäki Oy Procede et appareil servant a retirer une fraction d'un condenseur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551988A1 (fr) * 1983-09-19 1985-03-22 Rousselle Sarl Frank Procede de regeneration des solvants de nettoyage et installation de mise en oeuvre du procede
DE3520885A1 (de) * 1985-06-11 1986-12-11 Kurt von Dipl.-Chem. Dr.rer.nat. 8170 Bad Tölz Beckerath Verfahren und anlage zur weitgehenden restentfernung von schadstoffen aus abgasen von verbrennungsanlagen
DE3706684A1 (de) * 1986-04-08 1987-10-15 Kurt Von Dipl Chem D Beckerath Verfahren zur entfernung von fluechtigen schadstoffen aus kontaminierten boeden, sanden, schlaemmen und vergleichbaren feststoffaggregaten und rueckstaenden
DE3639779A1 (de) * 1986-11-21 1988-06-01 Linde Ag Verfahren zur gewinnung von co(pfeil abwaerts)2(pfeil abwaerts) aus einem co(pfeil abwaerts)2(pfeil abwaerts)-reichen erdgas
US4834841A (en) * 1987-10-01 1989-05-30 Peck Kenneth W Method for treating baking oven stack gases
US4834841B1 (en) * 1987-10-01 1996-07-30 Kenneth W Peck Method for treating baking oven stack gases
WO1989010174A1 (fr) * 1988-04-29 1989-11-02 Huhtamäki Oy Procede et appareil servant a retirer une fraction d'un condenseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 85-100935/17, Class J01; & FR,A,2 551 988 (ETS PICCANE), 22 March 1985. *

Also Published As

Publication number Publication date
AUPM629994A0 (en) 1994-07-14

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