GB2455308A - Particulate material cleaning apparatus - Google Patents

Particulate material cleaning apparatus Download PDF

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Publication number
GB2455308A
GB2455308A GB0723689A GB0723689A GB2455308A GB 2455308 A GB2455308 A GB 2455308A GB 0723689 A GB0723689 A GB 0723689A GB 0723689 A GB0723689 A GB 0723689A GB 2455308 A GB2455308 A GB 2455308A
Authority
GB
United Kingdom
Prior art keywords
conduit
apertures
water
particulate
pressure
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Withdrawn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
GB0723689A
Other versions
GB0723689D0 (en
Inventor
Colin Ibbotson
Darren Stephen Sharpe
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.)
UNIQUE SEPARATION Co Ltd
Original Assignee
UNIQUE SEPARATION Co 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 UNIQUE SEPARATION Co Ltd filed Critical UNIQUE SEPARATION Co Ltd
Priority to GB0723689A priority Critical patent/GB2455308A/en
Publication of GB0723689D0 publication Critical patent/GB0723689D0/en
Priority to PCT/GB2008/004013 priority patent/WO2009071897A1/en
Publication of GB2455308A publication Critical patent/GB2455308A/en
Withdrawn legal-status Critical Current

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

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, possibly in spiral formation 3, 4. 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. Apertures 2 typically have a diameter of less than 0.5mm and the pressure within chamber 5 is 15MPa. An associated method is also disclosed.

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 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 poor qual-ity minerals) are normally disposed of in landfill due to unsuitability for recycling or lack of appropriate recycling technology and facilities. It is difficult to dean and separate the aggregates and sand contained within these wastes, together with the finer crushed demolition materials, from clay, soil, silts and other ex- cess or non-suitable contaminants. These materials, when dean, can be valu- able, because they can replace aggregates and sand which are normally de- rived from land based quarries and sea dredged aggregates, which are becom-ing 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 conven- tional processes Is difficult or impossible, due to limited availability of land situ-ated in suitable geographical urban environment locations where these types of waste occur.
Summary of the Invention
According to the invention, apparatus for deaning 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 150 bar (1 5MPa). 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 whose size will typically be smaller than the par-tide size (largest dimension) being cleaned.
It has been found that the apparatus of the invention is effective in re-moving clay, soil, silts and other excess or non-suitable contaminants adhering to particles typically from around 2mm up to around 100mm, using only a small proportion of the water that would be used in conventional apparatus.
is The invention also provides a method of removing contaminants adher-ing to particulate materials, comprising passing the materials through an elon-gate 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, a tangential separator or a centrifuge, located adjacent to the outlet of the appara-tus.
A further application for the invention is in recovery of petroleum from the sediment that settles out in petroleum storage tanks and lagoons at petro-chemical 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 dean enough to be disposed of without causing any environmental pollution.
Brief Description of the Drawings
In the drawings, which illustrate diagrammatically an exemplary embodi-ment 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 honzontal to permit downward flow of the material through it. The conduit I has a plurality of fine (0.3mm diameter) holes 2 passing through the wail 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 150 bar (l5Mpa)) from a separate pump (not shown) through an inlet 6, to create within the con-duit 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 separa- tion stages, for example filtration or screening, a tangential separator or a cen-trifuge, to recover the cleaned material from the water and, if desired, to recycle the water by separation out of the contaminants. 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 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 poor qual-ity minerals) are normally disposed of in landfill due to unsuitability for recycling or lack of appropriate recycling technology and facilities. It is difficult to dean and separate the aggregates and sand contained within these wastes, together with the finer crushed demolition materials, from clay, soil, silts and other ex- cess or non-suitable contaminants. These materials, when dean, can be valu- able, because they can replace aggregates and sand which are normally de- rived from land based quarries and sea dredged aggregates, which are becom-ing 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 conven- tional processes Is difficult or impossible, due to limited availability of land situ-ated in suitable geographical urban environment locations where these types of waste occur.
Summary of the Invention
According to the invention, apparatus for deaning 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 150 bar (1 5MPa). 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 whose size will typically be smaller than the par-tide size (largest dimension) being cleaned.
It has been found that the apparatus of the invention is effective in re-moving clay, soil, silts and other excess or non-suitable contaminants adhering to particles typically from around 2mm up to around 100mm, using only a small proportion of the water that would be used in conventional apparatus.
is The invention also provides a method of removing contaminants adher-ing to particulate materials, comprising passing the materials through an elon-gate 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, a tangential separator or a centrifuge, located adjacent to the outlet of the appara-tus.
A further application for the invention is in recovery of petroleum from the sediment that settles out in petroleum storage tanks and lagoons at petro-chemical 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 dean enough to be disposed of without causing any environmental pollution.
Brief Description of the Drawings
In the drawings, which illustrate diagrammatically an exemplary embodi-ment 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 honzontal to permit downward flow of the material through it. The conduit I has a plurality of fine (0.3mm diameter) holes 2 passing through the wail 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 150 bar (l5Mpa)) from a separate pump (not shown) through an inlet 6, to create within the con-duit 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 separa- tion stages, for example filtration or screening, a tangential separator or a cen-trifuge, to recover the cleaned material from the water and, if desired, to recycle the water by separation out of the contaminants.

Claims (12)

1. Apparatus for removing contaminants adhering to particulate ma-tenals, 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 aper- tures therethrough extending along the conduit and arranged around the con-duit, a pressure chamber surrounding the conduit, the apertures communicating with the chamber, and means for supplying water under pressure to the cham-ber.
2. Apparatus according to Claim 1, wherein the conduit is a tube.
3. Apparatus according to Claim I or 2, wherein the apertures are ar-ranged in a spiral path along the length of the conduit.
4. Apparatus according to Claim 3, wherein the apertures are ar-ranged in a double spiral path along the length of the conduit.
5. Apparatus according to any preceding daim, wherein the aper-tures have a diameter of less than 0.5mm.
6. Apparatus according to Claim 5, wherein the apertures have a di-ameter of 0.3mm.
7. Apparatus according to any preceding claim, wherein the water supply is such that the pressure in the pressure chamber is I 5MPa (150 bar).
8. A method of removing contaminants adhering to particulate mate-rials, comprising passing the materials through an elongate conduit and direct- ing multiple fine high pressure water Jots into the material from a plurality of di-rections 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 diame-tore 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 I 5MPa 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 ex-tracting the oil from the aqueous emulsion passing out of the conduit.
12. Apparatus for removing contaminants adhering to particulate ma-terials, substantially as described with reference to, and/or as shown in, the drawings.
I 3. A method of removing contaminants adhering to particulate mate-daIs, substantially as described with reference to the drawings.
12. Apparatus for removing contaminants adhering to particulate ma-terials, substantially as described with reference to, and/or as shown in, the drawings.
I 3. A method of removing contaminants adhering to particulate mate-daIs, substantially as described with reference to the drawings.
1. Apparatus for removing contaminants adhering to particulate ma-tenals, 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 aper- tures therethrough extending along the conduit and arranged around the con-duit, a pressure chamber surrounding the conduit, the apertures communicating with the chamber, and means for supplying water under pressure to the cham-ber.
2. Apparatus according to Claim 1, wherein the conduit is a tube.
3. Apparatus according to Claim I or 2, wherein the apertures are ar-ranged in a spiral path along the length of the conduit.
4. Apparatus according to Claim 3, wherein the apertures are ar-ranged in a double spiral path along the length of the conduit.
5. Apparatus according to any preceding daim, wherein the aper-tures have a diameter of less than 0.5mm.
6. Apparatus according to Claim 5, wherein the apertures have a di-ameter of 0.3mm.
7. Apparatus according to any preceding claim, wherein the water supply is such that the pressure in the pressure chamber is I 5MPa (150 bar).
8. A method of removing contaminants adhering to particulate mate-rials, comprising passing the materials through an elongate conduit and direct- ing multiple fine high pressure water Jots into the material from a plurality of di-rections 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 diame-tore 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 I 5MPa 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 ex-tracting the oil from the aqueous emulsion passing out of the conduit.
GB0723689A 2007-12-04 2007-12-04 Particulate material cleaning apparatus Withdrawn GB2455308A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0723689A GB2455308A (en) 2007-12-04 2007-12-04 Particulate material cleaning apparatus
PCT/GB2008/004013 WO2009071897A1 (en) 2007-12-04 2008-12-04 Apparatus for cleaning particulate materials

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
GB0723689D0 GB0723689D0 (en) 2008-01-16
GB2455308A true GB2455308A (en) 2009-06-10

Family

ID=38982942

Family Applications (1)

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

Country Status (2)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Family Cites Families (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
DE19643958C2 (en) * 1996-10-31 1999-07-08 Bbf Hochdrucktechnik Gmbh Drum cleaning system with transport helix

Also Published As

Publication number Publication date
WO2009071897A4 (en) 2009-07-30
GB0723689D0 (en) 2008-01-16
WO2009071897A1 (en) 2009-06-11

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