WO2009071897A1 - Apparatus for cleaning particulate materials - Google Patents

Apparatus for cleaning particulate materials Download PDF

Info

Publication number
WO2009071897A1
WO2009071897A1 PCT/GB2008/004013 GB2008004013W WO2009071897A1 WO 2009071897 A1 WO2009071897 A1 WO 2009071897A1 GB 2008004013 W GB2008004013 W GB 2008004013W WO 2009071897 A1 WO2009071897 A1 WO 2009071897A1
Authority
WO
WIPO (PCT)
Prior art keywords
conduit
apertures
water
pressure
chamber
Prior art date
Application number
PCT/GB2008/004013
Other languages
French (fr)
Other versions
WO2009071897A4 (en
Inventor
Darren Stephen Sharpe
Colin Ibbotson
Original Assignee
The Unique Separation Company 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 The Unique Separation Company Limited filed Critical The Unique Separation Company Limited
Publication of WO2009071897A1 publication Critical patent/WO2009071897A1/en
Publication of WO2009071897A4 publication Critical patent/WO2009071897A4/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/041—Cleaning travelling work
    • B08B3/042—Cleaning travelling work the loose articles or bulk material travelling gradually through a drum or other container, e.g. by helix or gravity
    • 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
    • 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
    • B03B5/10—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs
    • B03B5/22—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs using pulses generated by liquid injection
    • 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
    • B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
    • 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
    • B03B5/68—Washing granular, powdered or lumpy materials; Wet separating by water impulse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/06—Cleaning involving contact with liquid using perforated drums in which the article or material is placed
    • 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

  • This invention relates to apparatus for cleaning particulate materials, for example crushed demolition materials, soils, minerals, excavation waste, sand and stone.
  • _wastes,_ such, as concrete, brick, soils,- excavation waste and poor quality minerals, are created from quarrying, mining, construction and building development.
  • Demolition wastes concrete and brick
  • the remaining wastes soil, excavation wastes, and po#r quality minerals
  • apparatus for cleaning particulate materials comprises an elongate conduit whose longitudinal axis is set an angle to the horizontal whereby particulate material can pass through the conduit under the influence of gravity, the wall of the conduit having a plurality of fine apertures therethrough extending along the conduit and arranged around the conduit, a pressure chamber surrounding the conduit, the apertures communicating with the chamber, and means for supplying water under pressure to the chamber.
  • the conduit is a tube.
  • the apertures are suitably arranged in a spiral path along the conduit, and more preferably in a double spiral path.
  • the apertures are preferably of a diameter of less than 0.5mm, and more preferably have a diameter of 0.3mm, while the water pressure in the pressure chamber is preferably 200 bar (20MPa). It will be appreciated that the water pressure and aperture diameter may be varied within the scope of the invention, in order to achieve high velocity water jets to clean particle materials. It has been found that the apparatus of the invention is effective in removing clay, soil, silts and other excess or non-suitable contaminants adhering to particles typically from around 0.5mm up to around 70mm, using only a small proportion of the water that would be used in conventional apparatus.
  • the invention also provides a method of removing contaminants adher- ing to particulate materials, comprising passing the materials through an elongate conduit and directing multiple fine high pressure water jets into the material from a plurality of directions along the length of the conduit, and then separating the water from the materials passing out of the conduit.
  • This may be done by the use of mechanical separation equipment, such as screening equipment, hy- drocyclones, a tangential separator or a centrifuge, located adjacent to the outlet of the apparatus.
  • a further application for the invention is in recovery of petroleum from the sediment that settles out in petroleum storage tanks and lagoons at petrochemical and similar installations.
  • this sediment is simply disposed of in lagoons, and represents a waste of resources and a pollution problem, since a significant amount of the petroleum adheres to the sediment particles.
  • the action of the very fine high velocity water jets on the particles will detach the petroleum and carry it in the form of an emulsion, from which the oil can then more readily be recovered.
  • the sediment should then be clean enough to be disposed of without causing any environmental pollution.
  • Figure 1 is a cross-sectional elevation through the apparatus; and Figure 2 is a cross-section on line A-A in Figure 1.
  • the apparatus consists of a tubular conduit 1, mounted at a slight angle to the horizontal to permit downward flow of the material through it.
  • the conduit 1 has a plurality of fine (0.3mm diameter) holes 2 passing through the wall thereof and arranged in two spiral lines 3 and 4 extending along the conduit.
  • a pressure chamber 5 surrounds the conduit over the greater part of the length thereof, and is supplied with high pressure water (up to about 200 bar (20Mpa)) from a separate pump (not shown) through an inlet 6, to create within the conduit a large number of very fine high pressure jets of water 7 (Fig 2) extending across the conduit along its length.
  • Particulate material to be cleaned is passed through the conduit 1, in which the particles are subjected to the action of the high pressure water jets 7 from a range of angles as the material advances through the conduit under the influence of gravity and the water flow. It has been found that this dislodges any contaminants such as clay adhering to the particles, carrying the contami- nants away in the water flow to permit recovery of clean particulate material at the outlet of the conduit.
  • the volume of water consumed is very small because the small size of the jets.
  • the outlet of the apparatus may be linked to the inlet to further separation stages, for example filtration or screening, hydrocyclones, a tangential separator or a centrifuge, to recover the cleaned material from the water and, if desired, to recycle the water by separation out of the contaminants.
  • further separation stages for example filtration or screening, hydrocyclones, a tangential separator or a centrifuge

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

Apparatus for removing clay, soil, silt and other excess or non-suitable contaminants adhering to particulate materials, comprises an elongate conduit (1 ) whose longitudinal axis is set an angle to the horizontal whereby particulate material can pass through the conduit under the influence of gravity. The wall of the conduit has a plurality of fine apertures (2) therethrough extending along the conduit and arranged around the conduit. A pressure chamber (5) surrounds the conduit (1), the apertures (2) communicating with the chamber. Water is supplied under pressure to the chamber to create fine high pressure jets which dislodge any contaminants from the particles.

Description

APPARATUS FOR CLEANING PARTICULATE MATERIALS Field of the Invention
This invention relates to apparatus for cleaning particulate materials, for example crushed demolition materials, soils, minerals, excavation waste, sand and stone.
Background to the Invention
Various _wastes,_ such, as concrete, brick, soils,- excavation waste and poor quality minerals, are created from quarrying, mining, construction and building development. Demolition wastes (concrete and brick) are usually crushed to create various fill materials whilst the remaining wastes (soils, excavation wastes, and po#r quality minerals) are normally disposed of in landfill due to unsuitability for, recycling or lack of appropriate recycling technology and facilities or used as landscaping materials. It is difficult to clean and separate the minerals, aggregates and sand contained within these wastes, together with the finer crushed demolition materials, from clay, soil, silts and other excess or non- suitable contaminants. These materials, when clean, can be valuable to manufacturing and industry, because they can replace aggregates and sand which are normally derived from land based quarries and sea dredged aggregates, which are becoming increasingly costly. Conventional processes involve large-scale fixed processing plants, which have a high water demand and require settlement lagoons or complex water management systems. The substantial land and water requirements needed to operate such a process means that implementation of these conventional processes is difficult or impossible, due to limited space in quarries and mines and the lack of available land situated in suitable geographical urban environment locations where these types of waste occur. Summary of the Invention
According to the invention, apparatus for cleaning particulate materials comprises an elongate conduit whose longitudinal axis is set an angle to the horizontal whereby particulate material can pass through the conduit under the influence of gravity, the wall of the conduit having a plurality of fine apertures therethrough extending along the conduit and arranged around the conduit, a pressure chamber surrounding the conduit, the apertures communicating with the chamber, and means for supplying water under pressure to the chamber.
Preferably the conduit is a tube. The apertures are suitably arranged in a spiral path along the conduit, and more preferably in a double spiral path. The apertures are preferably of a diameter of less than 0.5mm, and more preferably have a diameter of 0.3mm, while the water pressure in the pressure chamber is preferably 200 bar (20MPa). It will be appreciated that the water pressure and aperture diameter may be varied within the scope of the invention, in order to achieve high velocity water jets to clean particle materials. It has been found that the apparatus of the invention is effective in removing clay, soil, silts and other excess or non-suitable contaminants adhering to particles typically from around 0.5mm up to around 70mm, using only a small proportion of the water that would be used in conventional apparatus.
The invention also provides a method of removing contaminants adher- ing to particulate materials, comprising passing the materials through an elongate conduit and directing multiple fine high pressure water jets into the material from a plurality of directions along the length of the conduit, and then separating the water from the materials passing out of the conduit. This may be done by the use of mechanical separation equipment, such as screening equipment, hy- drocyclones, a tangential separator or a centrifuge, located adjacent to the outlet of the apparatus.
A further application for the invention is in recovery of petroleum from the sediment that settles out in petroleum storage tanks and lagoons at petrochemical and similar installations. At present this sediment is simply disposed of in lagoons, and represents a waste of resources and a pollution problem, since a significant amount of the petroleum adheres to the sediment particles. By passing the sediment through the apparatus of the invention, the action of the very fine high velocity water jets on the particles will detach the petroleum and carry it in the form of an emulsion, from which the oil can then more readily be recovered. The sediment should then be clean enough to be disposed of without causing any environmental pollution. Brief Description of the Drawings In the drawings, which illustrate diagrammatically an exemplary embodiment of the invention:
Figure 1 is a cross-sectional elevation through the apparatus; and Figure 2 is a cross-section on line A-A in Figure 1. Detailed Description of the Illustrated Embodiment
The apparatus consists of a tubular conduit 1, mounted at a slight angle to the horizontal to permit downward flow of the material through it. The conduit 1 has a plurality of fine (0.3mm diameter) holes 2 passing through the wall thereof and arranged in two spiral lines 3 and 4 extending along the conduit. A pressure chamber 5 surrounds the conduit over the greater part of the length thereof, and is supplied with high pressure water (up to about 200 bar (20Mpa)) from a separate pump (not shown) through an inlet 6, to create within the conduit a large number of very fine high pressure jets of water 7 (Fig 2) extending across the conduit along its length. Particulate material to be cleaned is passed through the conduit 1, in which the particles are subjected to the action of the high pressure water jets 7 from a range of angles as the material advances through the conduit under the influence of gravity and the water flow. It has been found that this dislodges any contaminants such as clay adhering to the particles, carrying the contami- nants away in the water flow to permit recovery of clean particulate material at the outlet of the conduit. The volume of water consumed is very small because the small size of the jets.
The outlet of the apparatus may be linked to the inlet to further separation stages, for example filtration or screening, hydrocyclones, a tangential separator or a centrifuge, to recover the cleaned material from the water and, if desired, to recycle the water by separation out of the contaminants.

Claims

1. Apparatus for removing contaminants adhering to particulate materials, comprising an elongate conduit whose longitudinal axis is set an angle to the horizontal whereby particulate material can pass through the conduit un- der the influence of gravity, the wall of the conduit having a plurality of fine apertures therethrough extending along the conduit and arranged around the conduit, a pressure chamber surrounding the conduit, the apertures communicating with the chamber, and means for supplying water under pressure to the chamber.
2. Apparatus according to Claim 1 , wherein the conduit is a tube.
3. Apparatus according to Claim 1 or 2, wherein the apertures are arranged in a spiral path along the length of the conduit.
4. Apparatus according to Claim 3, wherein the apertures are arranged in a double spiral path along the length of the conduit.
5. Apparatus according to any preceding claim, wherein the apertures have a diameter of less than 0.5mm.
6. Apparatus according to Claim 5, wherein the apertures have a diameter of 0.3mm.
7. Apparatus according to any preceding claim, wherein the water supply is such that the pressure in the pressure chamber is 20MPa (200 bar).
8. A method of removing contaminants adhering to particulate materials, comprising passing the materials through an elongate conduit and directing multiple fine high pressure water jets into the material from a plurality of directions along the length of the conduit, and then separating the water from the materials passing out of the conduit.
9. A method according to Claim 8, comprising generating the jets by providing apertures through the wall of the conduit, the apertures having diameters less than 0.5mm, and applying high pressure water to the exterior of the conduit.
10. A method according to Claim 9, comprising applying the water at a pressure of 20MPa in a pressure chamber surrounding the conduit.
11. A method according to any of Claims 8, 9 and 10 for recovery of oil from oil-contaminated sand or sediment, comprising the further step of extracting the oil from the aqueous emulsion passing out of the conduit.
PCT/GB2008/004013 2007-12-04 2008-12-04 Apparatus for cleaning particulate materials WO2009071897A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0723689A GB2455308A (en) 2007-12-04 2007-12-04 Particulate material cleaning apparatus
GB0723689.6 2007-12-04

Publications (2)

Publication Number Publication Date
WO2009071897A1 true WO2009071897A1 (en) 2009-06-11
WO2009071897A4 WO2009071897A4 (en) 2009-07-30

Family

ID=38982942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2008/004013 WO2009071897A1 (en) 2007-12-04 2008-12-04 Apparatus for cleaning particulate materials

Country Status (2)

Country Link
GB (1) GB2455308A (en)
WO (1) WO2009071897A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106269689A (en) * 2016-08-31 2017-01-04 平江县威派云母绝缘材料有限公司 Device is cleaned in a kind of mica sheet screening in mica paper production process
WO2018040044A1 (en) * 2016-08-31 2018-03-08 平江县威派云母绝缘材料有限公司 Mica sheet screening and cleaning device used in mica paper production process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427388A (en) * 1944-06-16 1947-09-16 Edward Curran & Company Ltd Apparatus for cleaning and otherwise treating small articles
US3754559A (en) * 1972-01-31 1973-08-28 Macleod Co Drum type washer for metal borings and the like
US4170488A (en) * 1974-07-30 1979-10-09 J. S. Mannor Machine Corporation Environmental, small-part continuous washing process
DE19643958A1 (en) * 1996-10-31 1998-05-20 Bbf Hochdrucktechnik Gmbh Transportation helix for spraying of cleaning agent

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427388A (en) * 1944-06-16 1947-09-16 Edward Curran & Company Ltd Apparatus for cleaning and otherwise treating small articles
US3754559A (en) * 1972-01-31 1973-08-28 Macleod Co Drum type washer for metal borings and the like
US4170488A (en) * 1974-07-30 1979-10-09 J. S. Mannor Machine Corporation Environmental, small-part continuous washing process
DE19643958A1 (en) * 1996-10-31 1998-05-20 Bbf Hochdrucktechnik Gmbh Transportation helix for spraying of cleaning agent

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106269689A (en) * 2016-08-31 2017-01-04 平江县威派云母绝缘材料有限公司 Device is cleaned in a kind of mica sheet screening in mica paper production process
CN106269689B (en) * 2016-08-31 2017-11-07 平江县威派云母绝缘材料有限公司 A kind of mica sheet screening cleaning device being used in mica paper production process
WO2018040044A1 (en) * 2016-08-31 2018-03-08 平江县威派云母绝缘材料有限公司 Mica sheet screening and cleaning device used in mica paper production process
GB2568330A (en) * 2016-08-31 2019-05-15 Pingjiang Vpi Mica Insulating Mat Co Ltd Mica sheet screening and cleaning device used in mica paper production process
GB2568330B (en) * 2016-08-31 2021-11-24 Pingjiang Vpi Mica Insulating Mat Co Ltd Mica sheet screening and cleaning device used in mica paper production process

Also Published As

Publication number Publication date
WO2009071897A4 (en) 2009-07-30
GB0723689D0 (en) 2008-01-16
GB2455308A (en) 2009-06-10

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