EP1024908A1 - 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

Info

Publication number
EP1024908A1
EP1024908A1 EP98945402A EP98945402A EP1024908A1 EP 1024908 A1 EP1024908 A1 EP 1024908A1 EP 98945402 A EP98945402 A EP 98945402A EP 98945402 A EP98945402 A EP 98945402A EP 1024908 A1 EP1024908 A1 EP 1024908A1
Authority
EP
European Patent Office
Prior art keywords
aggregate
apparams
solvent
transferring
drum
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.)
Withdrawn
Application number
EP98945402A
Other languages
German (de)
English (en)
Inventor
Ian Brookes
Richard Monbiot
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.)
Pronatur Products Ltd
Original Assignee
Pronatur Products Ltd
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 Ltd filed Critical Pronatur Products Ltd
Publication of EP1024908A1 publication Critical patent/EP1024908A1/fr
Withdrawn legal-status Critical Current

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.
EP98945402A 1997-10-21 1998-09-29 Procede et appareil de recyclage d'un agregat contamine par un hydrocarbure Withdrawn EP1024908A1 (fr)

Applications Claiming Priority (3)

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

Publications (1)

Publication Number Publication Date
EP1024908A1 true EP1024908A1 (fr) 2000-08-09

Family

ID=10820798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98945402A Withdrawn EP1024908A1 (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)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20011439A1 (it) * 2001-07-06 2003-01-06 Enitecnologie Spa Procedimento di bonifica di suoli inquinati da composti organici
GB2431682A (en) * 2005-10-27 2007-05-02 Ps Rail Ltd Ballast removing device and method
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
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
WO2010142026A1 (fr) * 2009-06-07 2010-12-16 Imc-International Marketing Of Canada Corp. Système et appareil de récupération de déversements de pétrole amphibies
CN105498942B (zh) * 2016-01-18 2017-10-10 中铁七局集团第二工程有限公司 一种建筑砂石清洗装置
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
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

Family Cites Families (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
IT1194146B (it) * 1981-11-12 1988-09-14 Palmiero Capannoli Apparecchiatura di lavaggio di inerti,quali sabbia,ghiaia e simili
DE3339955A1 (de) * 1983-11-04 1985-05-15 Helmut 4690 Herne Apfelbaum Reinigungs- und abscheideeinrichtung fuer oel-feststoff-gemische
FR2636669B3 (fr) * 1988-09-19 1991-03-29 Guillaume Jean Paul Unite mobile de regenerateur de boues de forage
JPH08506524A (ja) * 1993-11-30 1996-07-16 ブリテイツシユ・ニユクリアー・フユールズ・ピー・エル・シー 粒状物質処理方法
US5634984A (en) * 1993-12-22 1997-06-03 Union Oil Company Of California Method for cleaning an oil-coated substrate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9920409A1 *

Also Published As

Publication number Publication date
AU9273298A (en) 1999-05-10
WO1999020409A1 (fr) 1999-04-29
GB9722128D0 (en) 1997-12-17

Similar Documents

Publication Publication Date Title
KR0171626B1 (ko) 탱크의 세정과 탱크내의 잔류액체의 회수 및 처리를 위한 장치 및 방법
US5199997A (en) Treatment of hydrocarbon-contaminated particulate materials
KR100988942B1 (ko) 오염토양 세척 선별장치
KR100534067B1 (ko) 오염 토양의 복원과 선별 처리를 위한 토양 세척 방법과장치
KR100870909B1 (ko) 유류에 오염된 토사석의 복원방법 및 그 장치
WO1999020409A1 (fr) Procede et appareil de recyclage d'un agregat contamine par un hydrocarbure
US20110170953A1 (en) Method and system for removing liquid hydrocarbons from contaminated soil
US5637152A (en) Soil washing apparatus and method
GB2089403A (en) Method and apparatus for washing particulate material
US5266220A (en) Method for melting contaminated snow and washing solids held therein
US6143170A (en) Oil recovery system
KR100987198B1 (ko) 차량에 탑재된 오염토양 세척 선별장치
US5896876A (en) Method and apparatus for decontamination of poly chlorinated biphenyl contaminated soil
JP4697719B2 (ja) 汚染土壌の浄化方法及びそれに用いる分離装置
CN111760820A (zh) 一种高效环保的生产混凝土系统
JPS6059202A (ja) 鉄道線路バラスを清掃するための方法と機械
HU214349B (hu) Eljárás és berendezés szemcsés talajok folyamatos átmosására
KR100980982B1 (ko) 폐자동차의 폴리우레탄 폼 및 섬유류 자동 세척 장치
JP3645546B2 (ja) 残存生コンクリートの分別方法及び分別水分蒸発処理方法
JP3812910B2 (ja) 汚染土壌の浄化方法
JPS58101745A (ja) 砂を含む廃物分離方法及び装置
US5986147A (en) Method and solution for removal of poly chlorinated biphenyl
JP3647101B2 (ja) 砂ごみ分離搬出装置
JP4207523B2 (ja) 汚染土壌の処理装置
CN112474787B (zh) 一种用于土壤再生的原位淋洗修复设备

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000502

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20010618

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030325