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WO1992009369A1 - Appareil de recuperation du granulat dans des dechets de beton - Google Patents

Appareil de recuperation du granulat dans des dechets de beton Download PDF

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Publication number
WO1992009369A1
WO1992009369A1 PCT/GB1991/002082 GB9102082W WO9209369A1 WO 1992009369 A1 WO1992009369 A1 WO 1992009369A1 GB 9102082 W GB9102082 W GB 9102082W WO 9209369 A1 WO9209369 A1 WO 9209369A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
container
aggregate
cement
concrete
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.)
Ceased
Application number
PCT/GB1991/002082
Other languages
English (en)
Inventor
Colin Kingsley Dymott
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1992009369A1 publication Critical patent/WO1992009369A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
    • B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
    • B03B9/063—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial the refuse being concrete slurry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0015—Controlling the inclination of settling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/003—Sedimentation tanks provided with a plurality of compartments separated by a partition wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B01D21/2416—Liquid distributors with a plurality of feed points
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/58—Construction or demolition [C&D] waste

Definitions

  • This invention relates to apparatus for the batch reclamation of aggregate from waste plastic concrete.
  • a certain amount of waste plastic concrete is generated at ready mixed and precast concrete plants.
  • the cost of aggregates is increasing and in some parts of the U.K. they are in short supply.
  • the object of this invention is to provide simple, relatively unsophisticated apparatus for removing cement and some aggregate fines from waste plastic concrete and to return the coarse aggregate (stone) and a large proportion of the fine aggregate (sand) to stock for reuse.
  • apparatus for batch reclamation of aggregate from waste plastic concrete comprising a base, an open-topped container hinged to the base, means for moving the container relative to the base from a substantially level, working position to a tilted, discharging position, partitions in the container extending transversely to the hinge and dividing it into at least three tanks with the upper edges of the partitions providing weirs from a first tank to a second tank and so on, and means for introducing water under pressure downwards into said first tank, wherein, in use with the container in said working position, waste plastic concrete is deposited in said first tank and subjected to water under pressure, which causes cement and fine aggregate to be washed out of the concrete and separ- ated from coarse aggregate by being carried over a first weir for collection in said second tank, the latter overspilling a second weir into a third tank with cement particles and some aggregate fines in suspension, and wherein after such separation the contents of said first and second tanks are removed by tilting the container to said
  • At least one drain outlet will conveniently b provided for discharging a slurry of cement and fines from the third tank, and this may go to a separator for further treatment.
  • This could be a hydrocyclone or a settling tank/pit.
  • Means will preferably be provided for preventing the separated fine and coarse aggregate from mixing during discharge from the container, and conveniently the discharge end of the container includes an aggregate stop, to allo surplus water to escape first.
  • the container may b equipped with a hopper for loading the waste concrete into the washing tank and .at least one load cell may be provided between the container and its mounting.
  • Each pipe may comprise an inner tube and an outer tube, the outer tube being provided with one or more air inlets, and the inner tube being connected to th water supply line.
  • the pipes may be oscillated across the first tank to provid uniform washing, and they may be vertical or offset from th vertical.
  • the second tank will be provided with agitating means to keep the very fine material in suspen ⁇ sion.
  • Figure 1 is a perspective view of aggregate reclamation apparatus
  • FIG. 1 is a diagrammatic plan view of the apparatus of Figure 1
  • Figure 3 is a diagrammatic cross-section on the line III-III of Figure 2
  • Figure 4 is a longitudinal section of a pipe forming part of the apparatus, Figure 5 shows the apparatus in its working condition;
  • Figure 6 shows the apparatus in its discharging condition.
  • the apparatus comprises a generally rectangular container 1 with an open top and a sloping end. It is provided with longitudinal partitions 2 and 3 which divide the container into a washing
  • the bases of at least some of these tanks may be of shallow V or U-Section.
  • the partition 2 slopes to make the top of the tank 4 wider than its base, and its upper edge is higher than that of the partition 3. These upper edges form weirs 7 and 8.
  • Pipes 9 extend downwardly into the washing tank 4 and are supplied with water under pressure from a common supply line 10.
  • a loading hopper 11 is provided in one side wall of the container 1 at about the mid-length of the washing tank 4, and drain outlets 12 are provided in the base of the drain tank 6.
  • a paddle 13 extending virtually the length of the container is suspended into the settling tank 5 and can be oscillated transversely between the partitions 2 and 3.
  • the upper edge of the partition 2 leads into a wedge-like formation 14 widening to the lip of that sloping end, and this is flanked by inwardly projecting stop ledges 15 extending to the sides of the con ⁇ tainer.
  • the container 1 is pivotally mounted on a support base 16 by a transverse hinge 17 a short distance below the lip of the sloping end. Hydraulic actuators 18, symmetri ⁇ cally arranged one on each side, are coupled between the container 1 and its support base 16.
  • One or more load cells are also provided between the container 1 and the support base 16 to control loading of waste concrete into the washing tank 4.
  • Each pipe comprises an inner tube 19 arranged co-axially within an outer tube 20 extending down beyond the tube 19.
  • the inner tube connects with the water supply line 10, and the outer tube has a number of air inlets 21 near its upper end.
  • water under pressure is delivered from the line 10 into the inner tube 19. Its jet-like exit from the lower end of that tube causes air to be drawn into the air inlets 21 so that a mixture of water and air is discharged from the end of the outer tube 20 into the washing tank 4.
  • the lower end of each pipe 9 extends below the level of weir 7, whilst the air inlets 21 are kept above the level of the weir and so above the .level of the liquid in the washing tank • 4.
  • the pipes are preferably arranged to oscillate to and fro across the washing tank 4. More than one set of pipes may be used, and the pipes may be vertical or offset from the vertical.
  • waste plastic concrete with a collapsed slump is loaded into the washing tank 4 via the hopper 11.
  • the concrete in the washing tank 4 is subjected to the action of water, combined with air, from the pipes 9.
  • Cement, sand and fine aggregate below about 5mm particle size are washed out of the concrete in the washing tank 4 and carried over the weir 7 into the settling tank 5, the coarse aggregate being retained in the washing tank 4.
  • Sand particles are retained in the settling tank 5 whilst cement and fines are carried over the weir 8 into the drain tank 6, the paddle 13 keeping the contents agitated to ensure that the fine particulate material remains in suspension.
  • a slurry of cement and fines is discharged from the drain tank 6, via the drain outlets 12, to a hydrocyclone or settlement pit or tank for eventual removal off site.
  • the container 1 After completion of the washing process and emptying of the tank 6, the container 1 is tipped up from the Figure 5 to the Figure 6 position to discharge aggregate retained in the tanks 4 and 5. First, water will spill out and it will be allowed to run away to drain. At a certain angle, before all the water has escaped, the coarse and fine aggregate will start to slide, first towards the sloping end and then, as the angle increases, over that end towards the ledges 15. These form aggregate stops and temporarily halt the aggregates as the last of the "free" water pours away over them. But then, with the container 1 approaching the Figure 6 position, the aggregates will avalanche over the stop ledges 15 and over the lip of the sloping end.
  • the coarse and fine aggregates from the tanks 4 and 5 are prevented from mixing together whilst being discharged by the wedge formation 14, which directs them to the side end regions 22 and 23 of the container.
  • the container could have more, for more grad ⁇ uated separation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

On récupère le granulat dans des déchets de béton plastique à l'aide d'un appareil comportant un récipient (1) articulé (17) sur une embase (16). Le récipient est divisé par des cloisons (2, 3) en un bac de lavage (4), un bac de sédimentation (5) et un bac d'essorage (6). Le rebord supérieur de chaque cloison définit un déversoir (7, 8). Les déchets de béton sont déposés dans le bac de lavage (4) et sont soumis à l'action des jets d'eau sortant de tuyaux (9) avec de l'air entraîné. Le ciment et les déchets fins traversent le premier déversoir (7) pour arriver dans le bac de sédimentation (5), le granulat grossier restant dans le bac de lavage (4). Le ciment et des granulats fins sont transportés à travers le deuxième déversoir (8), tandis que la majeure partie des granulats fins se dépose dans le deuxième bac (5). Une palette oscillante (13) facilite la séparation qui a lieu dans ce bac. Un coulis de ciment et de granulats fins est évacué du troisième bac (6) par des sorties de drainage (12) en vue d'un traitement ultérieur dans un bac/puits de sédimentation ou un hydrocyclone. Les granulats séparés sont retirés en faisant basculer le récipient (1) autour de l'articulation (17) jusqu'à une position de décharge.
PCT/GB1991/002082 1990-11-26 1991-11-25 Appareil de recuperation du granulat dans des dechets de beton Ceased WO1992009369A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9025651A GB2249975A (en) 1990-11-26 1990-11-26 Reclaiming aggregate from waste concrete
GB9025651.2 1990-11-26

Publications (1)

Publication Number Publication Date
WO1992009369A1 true WO1992009369A1 (fr) 1992-06-11

Family

ID=10685979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/002082 Ceased WO1992009369A1 (fr) 1990-11-26 1991-11-25 Appareil de recuperation du granulat dans des dechets de beton

Country Status (4)

Country Link
EP (1) EP0558582A1 (fr)
AU (1) AU9030091A (fr)
GB (1) GB2249975A (fr)
WO (1) WO1992009369A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736317A1 (fr) * 1995-03-20 1996-10-09 Vivex AB Méthode et un appareil pour la séparation de particules fines d'un liquide par principe de gravitation
AU2009202000B2 (en) * 2009-05-20 2011-02-03 Richard Amadio Holdings (Aust) Pty Limited Systems and methods for washing-out concrete pouring equipment
CN113349396A (zh) * 2021-06-11 2021-09-07 万元坤 一种用于歺饮垃圾清杂提纯加工饲料的处理系统

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698800B1 (fr) * 1992-12-09 1995-02-24 Coremat Sa Circuit de traitement des résidus de béton.
DE19643532A1 (de) * 1996-10-23 1998-04-30 Schenck Process Gmbh Verfahren und Schwingförderrinne zum Behandeln von Reinigungsgut
AU783060B2 (en) * 2001-03-22 2005-09-22 Richard Amadio Holdings (Aust) Pty Limited Concrete pump bin
WO2004026710A1 (fr) * 2002-09-23 2004-04-01 Richard Amadio Cuve de pompe a beton
US6802964B2 (en) 2002-11-20 2004-10-12 Mark Preisser Tipping pit water reclaiming system
US7699065B2 (en) * 2006-08-22 2010-04-20 Ecocrete, Inc. Method and apparatus for filling concrete bin
GB2537698B (en) * 2015-09-07 2019-05-22 Cross Plant Hire Ltd Settlement tank

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR498678A (fr) * 1919-04-26 1920-01-20 Puech Soc Appareil servant à laver et à classer les sables et graviers
GB211613A (en) * 1922-12-08 1924-02-28 Antoine France Improvements in or relating to water settling apparatus for coal washing plants
US1694255A (en) * 1927-04-09 1928-12-04 Garlick Edward Sand washer and separator
US3886063A (en) * 1970-01-08 1975-05-27 Reinhardt Friesz Wet concrete separator
CA1170215A (fr) * 1981-10-28 1984-07-03 Frederick S. Johnson Installation de lavage de betonnieres
US4563280A (en) * 1984-02-13 1986-01-07 Pool James R Self-cleaning mud pit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB210992A (en) * 1923-02-15 1924-02-14 Thomas Caink Improvements in machinery for washing grain, dried fruits, gravel, sand, minerals, and like granular substances, and rags, linen and like textile substances
GB696300A (en) * 1950-12-13 1953-08-26 Floatex Separations Ltd Improvements in classifying apparatus for sand, commonly called sand cones
NL295058A (fr) * 1962-07-07 1900-01-01
AT244885B (de) * 1964-02-21 1966-01-25 Hubert Dipl Kfm Dr Heigl Eindick- und Klassiervorrichtung
US4154671A (en) * 1977-05-17 1979-05-15 Borges Alfred R Method and apparatus for recycling undelivered cement
GB1568500A (en) * 1978-04-06 1980-05-29 Stothert & Pitt Ltd Reclamation of waste residue of concrete
US4274963A (en) * 1979-02-14 1981-06-23 Purvis Robert D Solids and liquid separating apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR498678A (fr) * 1919-04-26 1920-01-20 Puech Soc Appareil servant à laver et à classer les sables et graviers
GB211613A (en) * 1922-12-08 1924-02-28 Antoine France Improvements in or relating to water settling apparatus for coal washing plants
US1694255A (en) * 1927-04-09 1928-12-04 Garlick Edward Sand washer and separator
US3886063A (en) * 1970-01-08 1975-05-27 Reinhardt Friesz Wet concrete separator
CA1170215A (fr) * 1981-10-28 1984-07-03 Frederick S. Johnson Installation de lavage de betonnieres
US4563280A (en) * 1984-02-13 1986-01-07 Pool James R Self-cleaning mud pit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE,U,7 822 787 (KLÄRFIX-WASSERAUFBEREITUNGSTECHNICK) 9 November 1978 see page 5, line 6 - page 7, line 12 see figure *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736317A1 (fr) * 1995-03-20 1996-10-09 Vivex AB Méthode et un appareil pour la séparation de particules fines d'un liquide par principe de gravitation
US5700378A (en) * 1995-03-20 1997-12-23 Vivex Ab Method and apparatus for gravitational separation of fine articles from a liquid
AU2009202000B2 (en) * 2009-05-20 2011-02-03 Richard Amadio Holdings (Aust) Pty Limited Systems and methods for washing-out concrete pouring equipment
CN113349396A (zh) * 2021-06-11 2021-09-07 万元坤 一种用于歺饮垃圾清杂提纯加工饲料的处理系统

Also Published As

Publication number Publication date
GB2249975A (en) 1992-05-27
EP0558582A1 (fr) 1993-09-08
AU9030091A (en) 1992-06-25
GB9025651D0 (en) 1991-01-09

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