WO1996009903A1 - Procede de traitement de sables, de sables fins et d'ardoises grosses, pollues en surface, par exemple par du petrole - Google Patents

Procede de traitement de sables, de sables fins et d'ardoises grosses, pollues en surface, par exemple par du petrole Download PDF

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Publication number
WO1996009903A1
WO1996009903A1 PCT/EP1995/003790 EP9503790W WO9609903A1 WO 1996009903 A1 WO1996009903 A1 WO 1996009903A1 EP 9503790 W EP9503790 W EP 9503790W WO 9609903 A1 WO9609903 A1 WO 9609903A1
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WO
WIPO (PCT)
Prior art keywords
contaminated
fine
sands
grinding
attraction
Prior art date
Application number
PCT/EP1995/003790
Other languages
German (de)
English (en)
Inventor
Thomas Neesse
Original Assignee
Hans Huber Gmbh Maschinen- Und Anlagenbau
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 Hans Huber Gmbh Maschinen- Und Anlagenbau filed Critical Hans Huber Gmbh Maschinen- Und Anlagenbau
Publication of WO1996009903A1 publication Critical patent/WO1996009903A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/20—Disintegrating members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/02—General arrangement of separating plant, e.g. flow sheets specially adapted for oil-sand, oil-chalk, oil-shales, ozokerite, bitumen, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation

Definitions

  • the invention relates to a method for processing surface-contaminated, e.g. oil-contaminated sands, fine sands and silt in the range of 20-200 ⁇ m, which are pre-cleaned by wet digestion and separation of the fine grain ⁇ 10 ⁇ m as well as organic components of low density.
  • it is a process for the treatment of oil sands that are heavily contaminated with mineral oils.
  • oil sands occur primarily as sand trap residues, in particular also from petrol stations or motor vehicle workshops.
  • the method should also be used to improve sand cleaning> 0.1 mm.
  • a cleaning process is known (WLB Wasser, Lucas und Boden 6, 1994, pages 76/77).
  • the sand trap residues are digested wet and, with the addition of surfactants as emulsifiers, fed to a two-stage attraction. This results in partial oil film detachment from the particle surface and an emulsion formation in the wash water. After the fine grain has been separated off, the washing water must be subjected to extensive emulsion splitting.
  • the invention is based on the object of simplifying a method of the type specified above with regard to technology, particularly with regard to wastewater treatment, wherein process steps previously considered necessary, such as oil recycling, should be avoided as far as possible. It is said to be practically residue-free be worked. Furthermore, the cleaning should also be extended to the fine grain range 20 ... 200 ⁇ m, which is not possible according to the prior art.
  • the highly thickened suspension is therefore subjected to a grinding attraction; a high-oil-containing fine grain phase is formed by the addition of solidly dispersed adsorbents or by the autogenous production of fine grain, which is separated from the cleaned sand or silt phase by a subsequent separation according to the density or grain size.
  • DE 41 40 845 A1 discloses a process for removing contaminants from contaminated soils by adding hydrophobic solids with a defined particle size distribution.
  • a hydrophobic solid which is not mechanically changed during the washing process
  • granular adsorption agent is put into a grinding attrition, i.e. there with finely ground, i.e. is changed mechanically.
  • this is of essential importance for the effect, because when the carrier material is ground, a fresh surface is formed with surface charges that have not set, which are particularly adsorption-intensive.
  • a complete process for the treatment of contaminated soils is also known from EP 0 313 116 A2: a slurry is placed in a rotary drum at the head of this technology. However, this has nothing to do with the grinding attraction according to the finding to do. Lumps of soil up to 200 mm are used as the input material, the separation of fine material and cleaned soil takes place at about 1 mm. The ball sizes for that process are diameters of 20 - 100 mm, which means completely different proportions! If the prior art is still directed towards the coarse grain, a solution for the fine and fine grain area is proposed according to the invention, which means a qualitatively new step, ie a cleaning of the otherwise rejected contaminated fine grain.
  • the secondary fine grain ⁇ 5-10 ⁇ m which is formed during the attraction is preferably diluted with water and subjected to desludging at 5-10 ⁇ m in hydrocyclones, centrifuges and hydroseparators.
  • the pre-cleaned sands or fine sands are subjected to an additional intensive attack, in which, for the adsorption of the oil, additionally finely dispersed particles in the range ⁇ 5-10 ⁇ m have to be crushed.
  • This fine grain can either be formed automatically by grinding the surface layer of the sand grains by grinding attrition, and / or an adsorbent with low density and good grindability is mixed in, which is finely ground during the attrition. It can be assumed that the fresh surface formed in the course of the grinding attraction is particularly adsorptive.
  • fine-grained metallic grinding media can be added to the attrition in stirring vessels, which remain in the grinding chamber while the attracted sand is discharged with the flow.
  • the micro grinding media can have a size of 0.2-2 mm.
  • the newly formed, highly contaminated fine grain is separated off in a subsequent classification process. This is followed by the solid / liquid separation of this flocculated fine grain.
  • the conventional attrition is additionally compared with the attrition grinding according to the invention, which consists in particular in peeling off the outer mineral layer.
  • a sand 315-1000 ⁇ was attracted - in a small-scale attraction system at a speed of 1400 per minute.
  • the energy requirement was 40 kWh / t with an attraction time of 20 minutes.
  • Grinding bodies with a diameter of 1.1 mm and a solid / water ratio of 2: 1 were used.
  • the graphic 1 shows the direct comparison of the attrition with the milling attrition under comparable process conditions. It can be seen that the fine grain abrasion ⁇ 10 ⁇ m could be increased from 1% to 8.5% with a grinding attrition. There was also an increase in the oil depletion in the grain fraction from 12% to 51%.
  • Sand with an oil content of 2517 mg / kg was attracted.
  • the cleaned material (coarse material) contained 950 mg / kg, while the highly contaminated fine grain contained 12620 mg / kg oil.
  • This silt in the grain size range of 20-200 ⁇ m is adjusted to a solid / liquid ratio of 1: 1 with make-up water 2 and fed to the attrition grinding 3.
  • the attrition grinding is intensified by the addition of micro-grinding bodies 4 with a grain size of 0.2-0.4 mm. In this case, no adsorbents are added.
  • the fine grain ⁇ 5 (10) ⁇ m is autogenously formed by the fine sand itself.
  • the attrited suspension is mixed with make-up water 5. thins and the sludge 6 fed. With a separating cut of approx.
  • a wastewater 8 with contaminated fine grain is separated into this slurry with a centrifuge or hydrocyclone or hydroseparator. Furthermore, a cleaned fine sand 7 ⁇ 200 ⁇ m is obtained as a thick sludge discharge.
  • the sludge discharge from the centrifuge 6 in the circuit 8 can be returned to the attraction grinding 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne un procédé de traitement de sables, de sables fins et d'ardoises grosses, dont le grain est compris entre 20 et 200 νm, qui sont pollués en surface, notamment par du pétrole, et sont soumis à un nettoyage préliminaire par désintégration par voie humide et par séparation des grains < 10 νm, ainsi que des constituants organiques de faible masse volumique. Ce procédé se caractérise en ce que la suspension extrêmement concentrée est broyée à l'attritor dans un bac à agitation contenant des micro-éléments broyeurs dont la taille est comprise entre 0,2 et 2 mm.
PCT/EP1995/003790 1994-09-27 1995-09-25 Procede de traitement de sables, de sables fins et d'ardoises grosses, pollues en surface, par exemple par du petrole WO1996009903A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434531 1994-09-27
DEP4434531.3 1994-09-27

Publications (1)

Publication Number Publication Date
WO1996009903A1 true WO1996009903A1 (fr) 1996-04-04

Family

ID=6529326

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/003790 WO1996009903A1 (fr) 1994-09-27 1995-09-25 Procede de traitement de sables, de sables fins et d'ardoises grosses, pollues en surface, par exemple par du petrole

Country Status (2)

Country Link
DE (1) DE19535599A1 (fr)
WO (1) WO1996009903A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052656A3 (fr) * 1998-04-09 2000-01-06 Bertwin Langenecker Decontamination de sols et de boues souilles
EP0997202A2 (fr) * 1998-10-30 2000-05-03 Kabushiki Kaisha Kumagaigumi Procédé et installation de traitement de matiéres granulaires contaminées

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19740842A1 (de) * 1997-09-17 1999-03-18 Dortmunder Gusasphalt Gmbh & C Verfahren zur Wiederaufbereitung von schadstoffbelastetem Baumaterial
DE19907513C1 (de) * 1999-02-22 2000-08-10 Akw Apparate Verfahren Verfahren zur Reinigung verunreinigter körniger Stoffe durch Attrition

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313116A2 (fr) * 1987-10-22 1989-04-26 Metallgesellschaft Ag Procédé de traitement de sol contaminé
EP0325159A2 (fr) * 1988-01-16 1989-07-26 G E S U Gesellschaft Für Saubere Umwelt Mbh Procédé et dispositif de nettoyage continu de terres contaminées
DE3910842A1 (de) * 1989-04-04 1990-10-11 Bru Biorecycling Umwelttechnik Verfahren und vorrichtung zum reinigen von feinteiligem mineralischem gut wie sand oder erdreich von schadstoffen wie oel
DE4004368A1 (de) * 1990-02-13 1991-08-14 Preussag Ag Metall Verfahren zum entfernen von schadstoffen aus erde
DE4140845A1 (de) * 1990-12-11 1992-06-17 Kloeckner Oecotec Verfahren und vorrichtung zum entfernen von verunreinigungen aus kontaminierten boeden
US5186820A (en) * 1991-12-04 1993-02-16 University Of Alabama Process for separating bitumen from tar sands
DE4307719A1 (de) * 1993-03-11 1994-09-15 Nukem Gmbh Verfahren und Vorrichtung zur Dekontaminierung von oberflächig mit Schadstoffen verunreinigten Feststoffen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0313116A2 (fr) * 1987-10-22 1989-04-26 Metallgesellschaft Ag Procédé de traitement de sol contaminé
EP0325159A2 (fr) * 1988-01-16 1989-07-26 G E S U Gesellschaft Für Saubere Umwelt Mbh Procédé et dispositif de nettoyage continu de terres contaminées
DE3910842A1 (de) * 1989-04-04 1990-10-11 Bru Biorecycling Umwelttechnik Verfahren und vorrichtung zum reinigen von feinteiligem mineralischem gut wie sand oder erdreich von schadstoffen wie oel
DE4004368A1 (de) * 1990-02-13 1991-08-14 Preussag Ag Metall Verfahren zum entfernen von schadstoffen aus erde
DE4140845A1 (de) * 1990-12-11 1992-06-17 Kloeckner Oecotec Verfahren und vorrichtung zum entfernen von verunreinigungen aus kontaminierten boeden
US5186820A (en) * 1991-12-04 1993-02-16 University Of Alabama Process for separating bitumen from tar sands
DE4307719A1 (de) * 1993-03-11 1994-09-15 Nukem Gmbh Verfahren und Vorrichtung zur Dekontaminierung von oberflächig mit Schadstoffen verunreinigten Feststoffen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Sandfangrückstand- und Ölschlamm-Aufbereitungsanlage", WASSER, LUFT UND BODEN, no. 6, MAINZ DE, pages 76 - 77 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052656A3 (fr) * 1998-04-09 2000-01-06 Bertwin Langenecker Decontamination de sols et de boues souilles
EP0997202A2 (fr) * 1998-10-30 2000-05-03 Kabushiki Kaisha Kumagaigumi Procédé et installation de traitement de matiéres granulaires contaminées
EP0997202A3 (fr) * 1998-10-30 2002-09-25 Kabushiki Kaisha Kumagaigumi Procédé et installation de traitement de matiéres granulaires contaminées

Also Published As

Publication number Publication date
DE19535599A1 (de) 1996-03-28

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