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WO1999020409A1 - Procede et appareil de recyclage d'un agregat contamine par un hydrocarbure - Google Patents

Procede et appareil de recyclage d'un agregat contamine par un hydrocarbure Download PDF

Info

Publication number
WO1999020409A1
WO1999020409A1 PCT/GB1998/002934 GB9802934W WO9920409A1 WO 1999020409 A1 WO1999020409 A1 WO 1999020409A1 GB 9802934 W GB9802934 W GB 9802934W WO 9920409 A1 WO9920409 A1 WO 9920409A1
Authority
WO
WIPO (PCT)
Prior art keywords
aggregate
apparams
solvent
transferring
drum
Prior art date
Application number
PCT/GB1998/002934
Other languages
English (en)
Inventor
Ian Brookes
Richard Monbiot
Original Assignee
Pronatur Products Limited
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 Pronatur Products Limited filed Critical Pronatur Products Limited
Priority to EP98945402A priority Critical patent/EP1024908A1/fr
Priority to AU92732/98A priority patent/AU9273298A/en
Publication of WO1999020409A1 publication Critical patent/WO1999020409A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/04—Removing the ballast; Machines therefor, whether or not additionally adapted for taking-up ballast
    • 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
    • B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
    • B03B5/56—Drum classifiers
    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/02—Removing or re-contouring ballast
    • E01B2203/025—Suction

Definitions

  • the present invention relates to a method and apparatus for recycling an aggregate contaminated with a hydrocarbon. More particularly it relates to a method and apparatus for cleaning ballast, for example, the stone chippings used on railway tracks. It could however be used to clean, for example, pebbles from an oil contaminated beach.
  • US 4203493 discloses a method and apparatus for cleaning railway ballast.
  • the method comprises tumbling ballast in a drum with water.
  • cleaning is inefficient.
  • the apparatus should be mobile so that the method of the invention can be conducted in situ.
  • a method of cleaning and recycling an aggregate contaminated with a hydrocarbon comprising: i) subjecting the aggregate to a prewash, ii) solvent washing the aggregate to remove the hydrocarbon contaminant, iii) rinsing the aggregate with water to remove residual solvent containing the hydrocarbon contaminant, iv) separating off the solvent containing the hydrocarbon contaminant and water from the aggregate, and v) recycling the cleaned aggregate.
  • an apparatus for conducting the method of the invention, comprising; i) means for extracting and/or transferring the aggregate to the apparatus ii) means for prewashing the aggregate; iii) means for transferring the aggregate to a solvent treatment circuit; iv) means for transferring the aggregate to a water treatment circuit; v) means for transferring the cleaned and decontaminated aggregate for recycling, and vi) means for collecting waste streams from the solvent and water treatment circuits.
  • the apparatus is a mobile apparatus which is provided with its own means of power and propulsion.
  • the apparatus could be provided with wheels, runners or the like and is connected to, for example, a locomotive or tractor.
  • the apparatus could be a stationed apparatus.
  • the method comprises: i) transferring the aggregate contaminated with a hydrocarbon to a cleaning apparams. This is most preferably achieved using a hose and applying suction via, for example, a vacuum extractor. Other methods such as, for example, using a digger arm will of course be apparent to the skilled man. The actual means will depend on whether the apparatus is fixed or mobile; ii) optionally screening the aggregate to remove, for example, undersized particles, and litter. This can be achieved by methods familiar to the skilled man such as, for example, sieving, and/or passing the aggregate across an air stream.
  • the aggregate is then subjected to a pre-wash in water to remove, for example, fines for example, clay, which can cause "sticking" problems; iv) the aggregate is then subjected to a solvent wash.
  • the solvent could be any solvent capable of removing a hydrocarbon contaminant from the aggregate.
  • particularly favoured is a citrus extract because it is not subject to COSHH regulations.
  • the citrus extract is preferably a citrus peel oil such as for example a folded oil and/or a terpene. More preferably still the citrus extract is an orange extract.
  • the citrus extract may be used neat or diluted with a bulking agent such as a de-aromatized iso paraffin.
  • the cleaning solvent with oil contamination can be used as a low grade fuel and burnt.
  • the wash is preferably conducted in a tank, such as, for example, a drum or trommel, which is subjected to agitation.
  • the solvent with hydrocarbons dissolved therein is separated off, the waste stream being collected; v) the aggregate is then subjected to a rinse or wash in water.
  • the rinse or wash is preferably conducted in a tank such as, for example, a drum or trommel, which is subjected to agitation; vi) the water and residual solvent/hydrocarbon mixture is then separated off leaving a clean aggregate which can be recycled. The waste stream is again collected; and vii) the waste streams are then treated so that the hydrocarbons can be disposed of safely in a controlled manner as outlined in iv) above.
  • a tank such as, for example, a drum or trommel
  • the apparatus for use with the method can be fixed, in which case the aggregate is brought to and from the apparatus. More preferably it is a mobile apparatus.
  • a mobile apparatus is provided with a power source and propulsion means.
  • a method and apparatus according to the invention are described below, by way of example only, with reference to the following figs, in which: -
  • Fig. 1 is a schematic plan view of a mobile ballast washer
  • Fig. 2 is a schematic side elevation of the mobile ballast washer of Fig.
  • Fig. 3 is a process flow chart illustrating the stages of a method
  • Fig. 4 is a process flow chart illustrating the solvent circuit for the method according to Fig. 3;
  • Fig. 5 is a process flow chart illustrating the water circuit for the method according to Fig. 3;
  • Fig. 6 is a side elevation of a mobile apparatus according to a preferred embodiment of the invention.
  • Fig. 7 is a rear view of the mobile apparatus of Fig. 6.
  • an apparatus 10 comprises a platform 12 which supports the components of the apparatus.
  • a suction hose 14 is
  • a vacuum extractor 16 provides the force necessary to lift the surface ballast from the track to the apparams.
  • the aggregate is then optionally screened before being directed into a hopper 18 where it is stored.
  • a conveyor 20 provides the means for transferring the ballast from the hopper to a solvent drum 22. On the way it undergoes a pre- wash.
  • a conveyor means for example an Archimedean screw then transfers the aggregate to a water drum 24.
  • the respective waste streams from the solvent drum and water drum are directed to a respective solvent sump 26 and water sump 28.
  • the cleaned aggregate then passes for recycling via a conveyor 30 and movable chute 32.
  • the mobile apparatus is powered by way of a power and propulsion unit 34 which may be separate to or integral with platfo ⁇ n 12.
  • an apparams 10 of the type referred to with reference to Figs. 1 and 2 can be used to recycle oily railway ballast in situ.
  • the top layer of oily ballast is vacuumed up and conveyed to hopper 18 where it is screened - undersized solids and fines being drawn off in a waste stream.
  • the ballast is pre-washed, for example by spraying with water, and then conveyed to drum 22 where it under goes a solvent wash in a solvent circuit (Fig. 4)
  • the contaminated aggregate from the hopper is subjected to a solvent wash with a citrus extract in a drum or trommel.
  • the hydrocarbon contaminant is removed from the aggregate and d e solvent waste containing dissolved hydrocarbon is drawn off into a solvent sump where it is filtered to remove solids and fines.
  • the solvent with dissolved hydrocarbons may be stored for disposal or returned to the feed tank to be recycled.
  • the solvent washed aggregate is then conveyed to drum 24 where it undergoes a water wash (Fig. 5).
  • the solvent washed aggregate is conveyed from the solvent wash drum to a water wash drum where any remaining solvent with dissolved hydrocarbon is picked up and this waste stream is then passed to a water sump. It is men passed over a weir or skimmer to separate the solvent waste containing dissolved hydrocarbon contaminant from the water.
  • the water is then filtered to remove solids and fines and returned to the water feed tank and the solvent waste is returned to the solvent tank.
  • the cleaned ballast is then conveyed by .Archimedean screw or a chute for storage or is returned directly to the track.
  • a hose 14 sucks up the top 150mm of ballast which experiments have shown contains 90% of the contamination.
  • the hose is provided on a swing arm 15.
  • the aggregate is sucked up and optionally undergoes a dry screen before passing into a hopper 18. From there it passes into a drum 21 where it undergoes a prewash or wet screen to remove, for example, fines.
  • the drum 21 is vertically disposed above solvent drum 22 which in turn is disposed above the rinse drum 24.
  • Each drum is open and rotates about a central axle 23.
  • each axle Associated or integral with each axle is a spray arm 25 such that fluid can enter the drum under operation from a fluid pump and be sprayed onto the ballast within the drum.
  • Each drum is open and perforated below so that the fluid passes through into respective solvent and water sumps 26 and 28. Since the solvent is less dense and immiscible with the water, the waste streams can be recycled and returned to respective holding tanks 31 and 33.
  • Each drum has a plurality of shaped blades 27 which serve to retain the ballast in the drum whilst it is rotated in a given direction but, enable the ballast to be "thrown” into the neighbouring drum by altering me direction of rotation of the drum.
  • the last drum in the series is positioned such that the clean ballast can be thrown back onto the track.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne un procédé et un appareil de recyclage d'un agrégat contaminé par un hydrocarbure. L'invention concerne plus particulièrement un procédé et un appareil de nettoyage de ballast, tel les pierres concassées que l'on utilise dans une voie ferrée. On peut toutefois utiliser cet appareil pour nettoyer, par exemple, des galets de plages contaminées par des hydrocarbures. Le procédé consiste i) à faire subir un prélavage à l'agrégat, ii) à laver au solvant l'agrégat pour éliminer le contaminant hydrocarbure, iii) à rincer l'agrégat à l'eau pour éliminer le solvant résiduel contenant le contaminant hydrocarbure, iv) à séparer le solvant contenant le contaminant hydrocarbure et l'eau de l'agrégat, et v) à recycler l'agrégat nettoyé. L'appareil comprend i) un organe d'extraction et/ou de transfert de l'agrégat de l'appareil, ii) un organe de prélavage de l'agrégat, iii) un organe de transfert de l'agrégat vers un circuit de traitement au solvant, iv) un organe de transfert de l'agrégat vers un circuit de traitement à l'eau, v) un organe de transfert de l'agrégat nettoyé et décontaminé en vue d'un recyclage et vi) un organe de collecte de flux de déchets en provenance des circuits de traitement au solvant et à l'eau.
PCT/GB1998/002934 1997-10-21 1998-09-29 Procede et appareil de recyclage d'un agregat contamine par un hydrocarbure WO1999020409A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP98945402A EP1024908A1 (fr) 1997-10-21 1998-09-29 Procede et appareil de recyclage d'un agregat contamine par un hydrocarbure
AU92732/98A AU9273298A (en) 1997-10-21 1998-09-29 Method and apparatus for recycling an aggregate contaminated with a hydrocarbon

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9722128.7A GB9722128D0 (en) 1997-10-21 1997-10-21 Method and apparatus for recycling an aggregate contaminated with a hydrocarbon
GB9722128.7 1997-10-21

Publications (1)

Publication Number Publication Date
WO1999020409A1 true WO1999020409A1 (fr) 1999-04-29

Family

ID=10820798

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/002934 WO1999020409A1 (fr) 1997-10-21 1998-09-29 Procede et appareil de recyclage d'un agregat contamine par un hydrocarbure

Country Status (4)

Country Link
EP (1) EP1024908A1 (fr)
AU (1) AU9273298A (fr)
GB (1) GB9722128D0 (fr)
WO (1) WO1999020409A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003004184A1 (fr) * 2001-07-06 2003-01-16 Ecotec S.R.L. Procede de biorestauration de sol pollue par des composes organiques
GB2431682A (en) * 2005-10-27 2007-05-02 Ps Rail Ltd Ballast removing device and method
WO2010142026A1 (fr) * 2009-06-07 2010-12-16 Imc-International Marketing Of Canada Corp. Système et appareil de récupération de déversements de pétrole amphibies
US8101812B2 (en) 2007-09-20 2012-01-24 Green Source Energy Llc Extraction of hydrocarbons from hydrocarbon-containing materials
US8272442B2 (en) 2007-09-20 2012-09-25 Green Source Energy Llc In situ extraction of hydrocarbons from hydrocarbon-containing materials
US8404108B2 (en) 2007-09-20 2013-03-26 Green Source Energy Llc Extraction of hydrocarbons from hydrocarbon-containing materials and/or processing of hydrocarbon-containing materials
CN105498942A (zh) * 2016-01-18 2016-04-20 金思思 一种建筑砂石清洗装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109594435B (zh) * 2019-01-25 2024-03-08 泉州市劲力工程机械有限公司 一种应用于摆动式掏碴机构中的摆臂
CN109577113B (zh) * 2019-01-25 2023-12-29 泉州市劲力工程机械有限公司 一种应用于掏碴机中的摆动式掏碴机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203493A (en) * 1978-11-21 1980-05-20 Southern Railway Company Railway ballast cleaning apparatus
US4472272A (en) * 1981-11-12 1984-09-18 Palmiero Capannoli Apparatus for washing inert material
WO1985001884A1 (fr) * 1983-11-04 1985-05-09 Helmut Apfelbaum Installation de purification et de separation pour melanges d'huile et de matieres solides
FR2636669A1 (fr) * 1988-09-19 1990-03-23 Guillaume Jean Paul Unite mobile de regenerateur de boues de forage
WO1995015566A1 (fr) * 1993-11-30 1995-06-08 British Nuclear Fuels Plc Procede de traitement de matiere en particules
WO1995017244A1 (fr) * 1993-12-22 1995-06-29 Union Oil Company Of California Savons dissolvants et procedes d'utilisation de ces derniers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203493A (en) * 1978-11-21 1980-05-20 Southern Railway Company Railway ballast cleaning apparatus
US4472272A (en) * 1981-11-12 1984-09-18 Palmiero Capannoli Apparatus for washing inert material
WO1985001884A1 (fr) * 1983-11-04 1985-05-09 Helmut Apfelbaum Installation de purification et de separation pour melanges d'huile et de matieres solides
FR2636669A1 (fr) * 1988-09-19 1990-03-23 Guillaume Jean Paul Unite mobile de regenerateur de boues de forage
WO1995015566A1 (fr) * 1993-11-30 1995-06-08 British Nuclear Fuels Plc Procede de traitement de matiere en particules
WO1995017244A1 (fr) * 1993-12-22 1995-06-29 Union Oil Company Of California Savons dissolvants et procedes d'utilisation de ces derniers

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HRP20031077B1 (en) * 2001-07-06 2011-11-30 Ecotec S.R.L. Process for the remediation of soil polluted by organic compounds
US7287933B2 (en) 2001-07-06 2007-10-30 Ecotec S.R.L. Process for the remediation of soil polluted by organic compounds
WO2003004184A1 (fr) * 2001-07-06 2003-01-16 Ecotec S.R.L. Procede de biorestauration de sol pollue par des composes organiques
GB2431682A (en) * 2005-10-27 2007-05-02 Ps Rail Ltd Ballast removing device and method
US8522876B2 (en) 2007-09-20 2013-09-03 Green Source Energy Llc In situ extraction of hydrocarbons from hydrocarbon-containing materials
US8101812B2 (en) 2007-09-20 2012-01-24 Green Source Energy Llc Extraction of hydrocarbons from hydrocarbon-containing materials
US8272442B2 (en) 2007-09-20 2012-09-25 Green Source Energy Llc In situ extraction of hydrocarbons from hydrocarbon-containing materials
US8404107B2 (en) 2007-09-20 2013-03-26 Green Source Energy Llc Extraction of hydrocarbons from hydrocarbon-containing materials
US8404108B2 (en) 2007-09-20 2013-03-26 Green Source Energy Llc Extraction of hydrocarbons from hydrocarbon-containing materials and/or processing of hydrocarbon-containing materials
US9102864B2 (en) 2007-09-20 2015-08-11 Green Source Holdings Llc Extraction of hydrocarbons from hydrocarbon-containing materials and/or processing of hydrocarbon-containing materials
US9181468B2 (en) 2007-09-20 2015-11-10 Green Source Holdings Llc Extraction of hydrocarbons from hydrocarbon-containing materials and/or processing of hydrocarbon-containing materials
US9416645B2 (en) 2007-09-20 2016-08-16 Green Source Holdings Llc Extraction of hydrocarbons from hydrocarbon-containing materials and/or processing of hydrocarbon-containing materials
WO2010142026A1 (fr) * 2009-06-07 2010-12-16 Imc-International Marketing Of Canada Corp. Système et appareil de récupération de déversements de pétrole amphibies
CN105498942A (zh) * 2016-01-18 2016-04-20 金思思 一种建筑砂石清洗装置

Also Published As

Publication number Publication date
EP1024908A1 (fr) 2000-08-09
AU9273298A (en) 1999-05-10
GB9722128D0 (en) 1997-12-17

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