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WO2020030729A1 - Dispositif et système de préparation d'eau résiduelle de béton - Google Patents

Dispositif et système de préparation d'eau résiduelle de béton Download PDF

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Publication number
WO2020030729A1
WO2020030729A1 PCT/EP2019/071290 EP2019071290W WO2020030729A1 WO 2020030729 A1 WO2020030729 A1 WO 2020030729A1 EP 2019071290 W EP2019071290 W EP 2019071290W WO 2020030729 A1 WO2020030729 A1 WO 2020030729A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
comminution
solid
residual
concrete
Prior art date
Application number
PCT/EP2019/071290
Other languages
German (de)
English (en)
Inventor
Bernd Hahn
Original Assignee
Bernd Hahn
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 Bernd Hahn filed Critical Bernd Hahn
Publication of WO2020030729A1 publication Critical patent/WO2020030729A1/fr

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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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • 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
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • 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
    • 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
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to a method for the treatment of residual concrete water which is obtained as wastewater in the production of fresh concrete and which contains fresh back or residual concrete, in which method residual concrete water is collected and cleaned, and when the concrete is cleaned, residual water contained in it can be sedimented Solids are separated or removed and solid bodies are formed from the separated or removed sedimentable solids, the solid bodies being comminuted into solid particles.
  • the present invention relates to a system for the treatment of residual concrete water which is obtained as wastewater in the production of fresh concrete and contains fresh return or residual concrete, comprising a collecting device for collecting the residual concrete water and a cleaning device for cleaning the remaining concrete water, which cleaning device is designed for cleaning the residual concrete water by separating solids, which cleaning device comprises a solidification device for forming solid bodies from the separated solids, the system comprising a crushing device for crushing the solid bodies into solid grains.
  • the residual concrete water can only be used for concrete production within narrow limits, depending on its density. In addition, there are large amounts of residual concrete water that cannot be used. Since it is forbidden to feed the residual concrete water to the sewage system, only complex and expensive disposal of this residual concrete water by specialist companies is possible. This can cost several hundred euros per ton of sedimented solids.
  • this object is achieved in that the solid bodies formed are comminuted directly after they have been formed, without the interposition of a transport step.
  • the solid bodies which are formed from the sedimentable solid are comminuted in order to form solid particles which can be used as larger constituents in the production of concrete, in particular fresh concrete.
  • the solid bodies can be formed into solid grains the size of a pebble, in order to replace part of the gravel required for the production of concrete.
  • plate-shaped solid bodies which are formed from the separated or removed sedimentable solids can be comminuted in the desired manner. The disposal of such solid body panels is then no longer necessary.
  • the shape of the solid particles can in principle be of any type.
  • Irregularly shaped, jagged solid grains are just as possible as spherical, egg-shaped or cuboid or essentially spherical, egg-shaped or cuboid solid grains. Furthermore, it is optionally also possible to carry out the method without the steps of collecting and cleaning.
  • the usability of the sedimentable solids results in particular from the comminution of the solid bodies into solid bodies of the desired size.
  • On the intermediary of a transport step To dispense between the formation of the solid bodies and the comminution thereof has the particular advantage that no complex conveyor device has to be provided for this. Furthermore, it is not necessary to solve the problem of sticking or caking of the solid bodies formed, in particular the solid cake, solved in US 5,554,297 on the front device.
  • the proposed further developed method for the treatment of residual concrete water is possible without active conveying or without an active conveying step of the solid bodies from the step of forming the solid bodies to the step of comminuting the solid bodies into solid grains.
  • a plant or a system with which the method is carried out can be made particularly compact.
  • a conventional transport container is sufficient for such a system.
  • Such a system can be used, in particular, for mobile treatment of residual concrete water in the manner described.
  • the solid particles with an average particle size in a range from approximately 4 mm to approximately 50 mm are produced or formed by comminution.
  • they can be used with a medium grain large in a range from about 6 mm to about 25 mm manufactured by crushing or formed by appropriate shaping.
  • Such solid grains can be used in particular as a gravel substitute for the production of hardened concrete.
  • the average grain size is preferably specified. This enables targeted substitutes for concrete production to be formed from the sedimentable solids.
  • the solids can be crushed easily if they are mechanically crushed. In particular, this can be done by the action of at least one comminution element for comminuting the solid bodies into solid grains.
  • the at least one shredding element can be designed in the form of a crusher roller or a press ram. Any number of comminution elements can also be provided.
  • the solid bodies are comminuted in a comminution chamber in which the at least one comminution element is arranged or formed. This makes it possible, in particular, to carry out the comminution in a defined room, namely in a comminution room defined by the comminution chamber.
  • a compact system for treating residual concrete water can be designed.
  • the at least one comminution element is moved to comminute the solid body.
  • it can be moved or rotated. If a plurality of comminution elements are provided, these can in particular be moved in opposite directions or rotated in opposite directions in order to comminute the solid bodies into solid grains.
  • the solid bodies are preferably introduced into the comminution chamber through at least one filling opening.
  • the filling opening be closed when crushing, so that it must be opened before inserting the solid body.
  • the solid bodies are introduced into the comminution chamber solely by the force of gravity through an opening that is open against or essentially against the direction of gravity. This procedure makes it possible, in particular, to dispense entirely with any transport device in order to bring the solid bodies from the place at which they are formed to the place at which they are comminuted, namely into the comminution chamber.
  • the solid bodies pass through a filling funnel which has a filling funnel inlet and a filling funnel outlet, the filling funnel inlet defining a larger free cross-sectional area than the filling funnel outlet the filling opening are introduced into the comminution chamber.
  • a guiding or sliding surface defined by the filling funnel can be used to remove solid bodies that are transferred directly above the filling opening by the gravity acting on them by means of the filling funnel without the aid of active conveying devices or conveying elements through the filling opening into the comminution chamber contribute.
  • the solid bodies are comminuted in the comminution chamber, which comminution chamber defines a comminution space and comprises at least one comminution chamber wall, the at least one comminution chamber wall defining and defining an inner wall surface which bounds the comminution space wherein the inner wall surface is provided with a solid body non-stick coating.
  • Comminuting the large solid bodies produced in such a comminution chamber has the particular advantage that neither the solid bodies nor the Smaller solid particles formed from these can adhere to or bake on the at least one comminution chamber wall. The solid particles can be shredded easily and safely. Furthermore, the energy expenditure required for this can also be minimized.
  • the solid bodies are preferably comminuted with at least one comminuting element which is provided with a non-stick coating of solid bodies.
  • Comminuting the solid bodies with one or more such crushing elements has the particular advantage that neither the solid bodies nor the solid grains formed from them can adhere or bake on the at least one crushing element. This enables the process to be carried out in a reliable manner. In particular, continuous comminution of solid bodies is possible.
  • the solid bodies are introduced into the comminution chamber through the filling funnel, which defines at least one inner filling funnel surface and which inner filling funnel surface is provided with a solid body non-stick coating. If such a funnel is used, the risk of solid bodies adhering to or baking on an inner surface of the funnel when using such a funnel is minimal. Solid bodies can therefore be easily and safely introduced into the comminution chamber.
  • the collected residual concrete water is kept in motion. In particular, this can be done by stirring.
  • the separation of sedimentable solids from the residual concrete water is carried out in at least one separation step or in at least one separation stage.
  • separation steps or separation stages are provided.
  • Sedimentable solids are preferably separated or removed from the residual concrete water in the form of fine and / or suspended particles. These preferably have an average diameter of at most 0.5 mm, in particular of at most 0.2 mm.
  • sedimentable solids are separated or removed from the residual concrete water by inclined and / or lamella clarifiers and / or hydrocyclones. With such devices, the sedimentable solids can be easily separated or removed from the residual concrete water.
  • the separated or removed sedimentable solids are pressed or pressed to form solid bodies or solid particles.
  • the sedimentable solids can be pressed into solid bodies in the form of plates.
  • this can be done using a filter press.
  • the filter press With the filter press, the solids can be separated on the one hand and compressed on the other hand and dehydrated to a certain degree.
  • a residual moisture content of the solid bodies can in particular be in a range from about 45% to about 50%.
  • the solid bodies can, if necessary, be stored for further processing.
  • solid grains can also be formed directly by pressing, for example by pressing through appropriate dies or by filling and pressing in appropriate forms. Solid particles of the desired size and shape can thus be formed in a simple manner.
  • the separated sedimentable solids are advantageously dried. In this way, they can be processed with as little water as possible or even almost water-free.
  • the solids are comminuted or if the solids are dried.
  • the solids are harder before shredding, if they have dried, but they are less likely to bake together, which can happen in particular if they still have a certain residual moisture.
  • the cleaned residual concrete water in particular as purified fresh water, hereinafter also referred to as residual water, and possibly also to feed it directly into the sewage system, it is advantageous if the cleaned residual concrete water is filtered.
  • the cleaned residual concrete water is collected and / or stored as residual water.
  • it can be stored in a residual water collection container. This can be, in particular, a basin or a tank.
  • a density of the residual water is measured. In particular, this ensures that the collected and stored residual water does not exceed a certain water density that would not be permissible for the production of fresh concrete.
  • the residual water is added to the residual concrete water before and / or during cleaning.
  • Fresh water can be saved by using the cleaned concrete residual water, i.e. the residual water.
  • the residual water can be added to the process in practically every step to which fresh water would also be added.
  • the pH of the residual water is preferably measured. This makes it possible to determine whether the residual water has a high or basic or essentially neutral pH.
  • the residual water is neutralized or essentially neutralized depending on the measured pH.
  • this can be done by adding a base.
  • a base i.e. its pH value to a value in one Range from about 6 to 8, preferably to a value of about 7.
  • the density of the residual concrete water is measured before cleaning and / or during cleaning. In particular, this measurement can take place continuously or discontinuously. A water density actual value measured in this way can then be used to supply fresh concrete or residual water to the residual concrete water, for example.
  • a target water density value of the residual concrete water is specified and that the residual concrete water is cleaned until a measured actual water density value of the cleaned residual concrete water corresponds to the target water density value or less than the target water density value is.
  • At least one binder is added to the separated sedimentable solids before the formation of solid bodies or solid bodies.
  • Two, three or even more different binders can also be added.
  • the at least one binder makes it possible, in particular, to use solids or solids with higher Train strength.
  • the dimensional stability of the solid bodies and solid particles can be improved.
  • At least one binder is added to the unpurified residual concrete water and / or if at least one binder is added to the residual concrete water during cleaning.
  • the at least one binder, as described it can also be different or more binders, can be added to the residual concrete water before the formation of solid bodies or solid particles. In this way, particularly good mixing of the sedimentable solids with binder can be achieved.
  • At least one binder is added to the solid particles.
  • smaller solid particles can be bound together to form larger solid particles.
  • Cement is preferably added as at least one binder.
  • fresh cement can be added.
  • this enables the solid particles to be used again for the production of concrete.
  • At least one filler or / or at least one insulating material is added to the solid grains before and / or after the formation thereof.
  • insulation materials or raw materials for the brick and tile industry or the building materials industry can be trained. High-quality raw materials or raw materials can now be formed from the waste material that was originally no longer usable and which represented the sedimentable solids.
  • the solid bodies are designed in the form of plates.
  • the cleaned and separated sedimentable solids can be easily filled into molds and in particular pressed. Plates also have the advantage that they can be handled and stored easily, in particular in a compact manner.
  • the use of solid grains produced according to one of the methods described above is proposed as an additive for the production of concrete, in particular fresh concrete, or for the production of road surfaces. It is thus possible in particular for the sedimentable solids to be separated or removed from the residual concrete water be used completely or essentially completely for further meaningful use. Costly disposal as special waste can thus be effectively avoided.
  • the use of solid particles, which are formed by comminuting solid particles or by corresponding shape-forming production is also proposed as an additive for producing concrete, in particular fresh concrete, or for producing road coverings.
  • the object stated at the outset is achieved according to the invention in that the comminution device of the consolidation device is arranged or designed directly downstream of a conveying device.
  • a system developed in this way makes it possible, in particular, to shred the solid bodies formed and to continue to use the solid bodies formed in this way.
  • solid grains can also be formed directly with the solidification device. In this way, the shredding of the solids into solids can be avoided.
  • the system can also comprise only the solidification device for forming solid particles from the sedimentable solids or the comminution device for comminuting solid particles from sedimentable solids.
  • such a system for treating residual concrete water makes it possible to transfer the solid bodies from the consolidation device to the comminution device without any funding.
  • the system can be made particularly compact in this way.
  • a complex transport mechanism as is the case with the system known from US 5,554,297, is completely unnecessary. For example, to transfer the fixed The solid body from the solidification device to the shredding device can only use the gravity acting on the solid body, so that an active conveying device, as is known from the prior art, is completely superfluous.
  • the consolidation device is arranged or formed directly above or above the comminution device in relation to the direction of gravity.
  • This configuration of the system makes it possible, in particular, to implement a particularly compact structure, since an active conveyor device can be dispensed with entirely.
  • an active conveyor device can be dispensed with entirely.
  • the consolidation device and / or comminution device are designed to produce solid particles with an average particle size in the range from approximately 4 mm to approximately 50 mm.
  • the grain size can also be in the range from approximately 6 mm to approximately 25 mm.
  • the further use of the solid grains can depend in particular on their average grain size.
  • the system preferably comprises an input device for specifying the average grain size of the solid grains.
  • the input device can be designed to cooperate with the solidification device and / or the comminution device, so that solid particles with the desired average core size can be formed by comminution and / or directly by shaping.
  • the solid bodies can be comminuted in a simple manner if the comminution device is designed in the form of a mechanical comminution device.
  • this can comprise at least one crusher roller and / or at least one press ram.
  • Two, three or more crusher rollers and / or press rams can also be provided.
  • the mechanical comminution device comprises at least one comminution element for comminuting the solid bodies into solid grains.
  • at least one comminution element for comminuting the solid bodies into solid grains.
  • two or more shredding elements can be provided.
  • solid particles in a desired size range that is to say with a desired particle size, can be formed from the solid particles by comminution.
  • the comminution device preferably comprises two, three, four, five, six or more comminution elements.
  • the plurality of comminution elements can in particular be arranged and designed to work together in order to comminute the solid bodies into solid grains between them. For this purpose, for example, they can be arranged or designed to be movable relative to one another.
  • the system can be designed to be particularly simple and compact if the at least one comminution element is in the form of a worm shaft.
  • a screw shaft can be designed with a spiral-shaped conveyor wall arranged on a rotating shaft.
  • the conveyor wall can have a plurality of openings.
  • An edge of the spiral conveyor wall pointing away from the rotating shaft can in particular be structured to shred the solid bodies into solid grains in a defined manner.
  • the comminution of the solid bodies can be achieved in a simple and safe manner, in particular, in that the worm shaft has a spiral shape and is provided with a plurality of comminution members on its outer circumference. It is expedient if the plurality of comminution members are designed in the form of saw teeth pointing in the radial direction away from a longitudinal axis defined by the worm shaft. For example, the shape and size of the saw teeth can be used to specify a grain size of the solid particles.
  • the comminution device comprises a comminution chamber and if the at least one comminution element is arranged or formed in the comminution chamber.
  • This configuration enables in particular a compact structure of the system.
  • the solid bodies can be comminuted in a defined space, namely in a comminution space defined by the comminution chamber.
  • the at least one comminution element is advantageously arranged or designed to be movable.
  • it can be arranged or designed to be rotatable, displaceable or reciprocal. In this way, solid bodies can be comminuted easily and safely into solid particles.
  • the size reduction device comprises a drive device for driving the at least one size reduction element.
  • the at least one comminution element can be moved in the desired manner with the drive device.
  • two or more comminution elements can be provided, which can be rotated towards and away from one another or in particular in opposite directions relative to one another with the drive device.
  • the comminution device has at least one filling opening for introducing the solid bodies into the comminution chamber.
  • the filling opening can in particular be designed to be closable with a closure element. This means that only solids can be introduced into the shredding chamber when the filling opening is open.
  • the filler opening is preferably opened in the opposite or substantially opposite direction of gravity. This makes it possible in particular to introduce solid bodies from the solidification device into the shredding chamber exclusively through the weight force acting on the solid bodies through the filling opening.
  • the system comprises a hopper, that the hopper has a hopper inlet and a hopper outlet, that the hopper inlet defines a larger free cross-sectional area than the hopper outlet and that the hopper inlet of the hopper -
  • the opening is arranged further apart than the hopper outlet.
  • the filling funnel outlet is arranged or designed, in particular directly, against or against the direction of gravity above or above the filling opening.
  • Such a configuration makes it possible, in particular, to introduce solid bodies completely and without scattering losses through the filling opening into the comminution chamber.
  • the hardening device has a hardening device outlet and that the hardening device outlet is arranged or designed opposite to the direction of gravity above or above the filling opening.
  • This configuration makes it possible in particular to transfer solid bodies from the solidification device safely into the comminution chamber by means of a filling funnel.
  • the hardening device outlet is arranged above or above the filling funnel inlet in the opposite direction of gravity or is trained. This configuration makes it possible for solid bodies to fall directly from the solidification device outlet into the filling funnel inlet due to the acting gravity.
  • the comminution device has a solids grain outlet for discharging the solids grains from the comminution device.
  • the solids grain outlet for discharging the solids grains from the comminution device.
  • they can be filled up after being discharged from the comminution device.
  • the solid particles can be discharged from the comminution chamber in a simple manner, in particular by arranging or forming the solid particle outlet at the bottom of the comminution chamber in relation to the direction of gravity.
  • the solid matter outlet can be arranged or formed on a bottom of the comminution chamber.
  • the comminution chamber defines a comminution space and comprises at least one comminution chamber wall, if the at least one comminution chamber wall defines an inner wall surface delimiting the comminution space and if the inner wall surface is provided with a non-stick solid-body coating.
  • This development makes it possible, in particular, to prevent the solid bodies from adhering or caking to the at least one comminution chamber wall.
  • the non-stick coating of solid bodies makes it possible in particular to comminute solid bodies in the comminution device without additional precautions, such as sprinkling with dry granules. As a result, the system can be operated with minimal energy consumption.
  • the at least one comminution chamber wall is designed in the form of a bottom of the comminution chamber.
  • the bottom of the comminution chamber can also be provided with a non-stick coating of solid bodies.
  • the at least one shredding element is provided with a solid-body anti-adhesive coating.
  • the solid non-stick coating can in particular effectively prevent solid bodies or solid particles that have already been comminuted and that still have a relatively high residual moisture in the order of magnitude of approximately 40% to approximately 55% from adhering or caking to at least one comminution element.
  • the filler funnel defines at least one inner filler funnel surface and if the at least one inner filler funnel surface is provided with a solid-body non-stick coating.
  • Providing a non-stick solid body coating on the at least one inner hopper surface, in particular on all inner hopper surfaces, has the advantage, for example, that freshly formed solid bodies with a still high residual moisture content cannot adhere or cake to the at least one inner hopper surface when the hopper is used - no. Solid bodies that do not directly fall through the filling funnel into the shredding chamber through the filling opening can slide onto the at least one inner filling funnel surface and slide along it until they enter the shredding chamber through the filling opening.
  • the solid-body non-stick coating can be formed simply and inexpensively, in particular from at least one plastic, at least one ceramic and / or from at least one metal.
  • materials or material combinations can be selected which have the lowest possible wear for the operation of such a shredding device, so that the shredding device has a longest possible service life.
  • the at least one plastic is advantageously or contains polyethylene (PE), in particular ultra high molecular weight polyethylene (UHMWPE), urethane and / or polyurethane (PU).
  • PE polyethylene
  • UHMWPE ultra high molecular weight polyethylene
  • PU polyurethane
  • Particularly long service lives of the comminution device and other components of the system can be achieved, for example, if the at least one metal is zinc or contains a zinc alloy.
  • the system comprises a movement device for moving the collected residual concrete water.
  • the movement device can be designed in the form of a stirring device.
  • the cleaning device can in particular be designed in one stage. It is advantageous if it is multi-level. Solids and in particular sedimentable solids can be separated or removed from the residual concrete water in a more targeted and effective manner.
  • the cleaning device comprises a separating device for separating sedimentable solids in the form of fine and / or suspended particles from the residual concrete water.
  • these fine and / or suspended particles can have a diameter of at most 0.5 mm, in particular at most 0.2 mm.
  • the residual concrete water can be cleaned in a simple manner if the cleaning device comprises at least one inclined clarifier and / or at least one fin clarifier and / or at least one hydrocyclone.
  • the solidification device comprises a pressing device for pressing or pressing the separated or removed sedimentable solids to form solid bodies.
  • a pressing device for pressing or pressing the separated or removed sedimentable solids to form solid bodies.
  • the cleaning device is advantageously designed in the form of a filter press.
  • the filter press With the filter press, the solids can be separated on the one hand and compressed on the other hand and dehydrated to a certain degree.
  • a residual moisture content of the solid bodies can thus lie in particular in a range from approximately 40% to approximately 55%.
  • the system comprises a drying device for drying the separated sedimentable solids.
  • the drying device can in particular be designed to dry the sedimentable solids, for example before or after the comminution.
  • drying device is connected upstream or downstream of the comminution device.
  • several drying devices can also be provided, which dry the solids before and the solids after crushing.
  • the system comprises a thickening device for thickening the separated sedimentable solids before the formation of solid bodies.
  • the system preferably comprises at least one filter device for filtering the cleaned residual concrete water.
  • the filter device for filtering the cleaned residual concrete water.
  • the quality of the cleaned concrete residual water which, as already mentioned, is also referred to as residual water, can be further improved.
  • it can be supplied to the concrete production or the system at any point where fresh water would otherwise have to be supplied or, if necessary, can also be discharged into the sewage system.
  • the system comprises a residual water collection and / or residual water storage device for collecting and / or storing the cleaned concrete residual water as residual water.
  • the residual water collection and / or residual water storage device can be designed in the form of a residual water collection container, for example as a tank or basin.
  • the system comprises a first water density measuring device for measuring a density of the residual water in the residual water collection and / or residual water storage device.
  • the first watertightness measuring device makes it possible in particular to measure a watertightness of the residual water and thus to draw conclusions about the quality of the residual water.
  • the system comprises a residual water supply device for supplying residual water from the residual water collection and / or residual water storage device to the collection device and / or to the cleaning device.
  • the residual water supply device can be designed in the form of a line system which comprises one or more pumps for conveying the residual water.
  • the system comprises a pH value measuring device for measuring a pH value of the residual water.
  • the pH value measuring device can be arranged or formed in or on the residual water collection and / or residual water storage device. In this way, a pH value of the residual water can be determined in order to then decide whether it is necessary to neutralize the residual water, for example if it is strongly acidic. In particular, such neutralization can also be automated.
  • the system preferably comprises a neutralization device for neutralizing or essentially for neutralizing the residual water.
  • the neutralization can take place automatically depending on the pH value measured with the pH value measuring device.
  • the neutralization device can comprise a metering device for metering of acids and / or alkalis to neutralize basic or acidic residual water.
  • the system comprises a second water-tight measuring device for measuring a density of the residual concrete water in the cleaning device.
  • the second water density measuring device can be designed in the form of a continuously or discontinuously measuring second water density measuring device.
  • the second waterproofness measuring device can be used in particular to control and / or regulate the addition of fresh water or residual water depending on the measured water density.
  • the system has a water set point specification device for specifying a water set point value of the residual concrete water and a control and / or regulating device for controlling and / or regulating the cleaning device, which interacts with the water set point set point includes that the residual concrete water is cleaned until an actual water density value of the cleaned residual concrete water measured with the first or second water resistance measuring device corresponds to the water density target value or is less than the water density target value.
  • the setting of the actual water density value can be set by adding fresh and / or residual water.
  • the control and / or regulating device can for this purpose be arranged or designed to cooperate with a fresh water or the residual water supply device.
  • the system comprises a binder feed device for adding at least one binder to the separated sedimentable solids before and / or after the formation of solid bodies or solid bodies.
  • the binder feed device makes it possible, in particular, to have one or more binders or binder mixtures Add solids to form more stable and solid solids or solids.
  • the binder supply device is in fluid-effective connection with the collecting device and / or the cleaning device. This makes it possible, in particular, to supply binders to the collected residual concrete water in the collecting device or when cleaning the residual concrete water.
  • the binder feed device is preferably designed in the form of a cement feed device. In particular, this makes it possible to add binders in the form of cement to the residual concrete water in each stage of the process described above.
  • the system comprises a filler and / or insulating material feed device for adding at least one filler and / or at least one insulating material to the solid particles before and / or after the formation thereof.
  • a filler and / or insulating material feed device for adding at least one filler and / or at least one insulating material to the solid particles before and / or after the formation thereof.
  • all types of fillers or insulating materials are conceivable that are conceivable for the formation of insulating materials or starting materials for the brick and tile industry or the building materials industry.
  • Solid body plates can be formed in a simple manner if the consolidation device is in the form of a plate consolidation device for forming the solid bodies in the form of plates.
  • the consolidation device can be designed in the form of a plate press.
  • the system can be designed or operated as a closed system or essentially a closed system.
  • All of the feed devices described above can be designed in particular in the form of metering devices with which a quantity of the substances to be added or fed can be metered.
  • the feed devices can be designed to cooperate with the control and / or regulating device in order to control and / or regulate an addition of the respective substances.
  • Figure 1 is a schematic representation of an embodiment of a
  • Figure 2 is a schematic representation of a further embodiment of a system for treating residual concrete water
  • Figure 3 is a schematic representation of the sequence of a variant of a
  • FIG. 4 a schematic representation of the sequence of a further variant of a method for treating residual concrete water
  • FIG. 5 shows a schematic representation of a further exemplary embodiment of a system for treating residual concrete water
  • Figure 6 is a schematic representation of a second embodiment of a system for treating residual concrete water
  • Figure 7 is a schematic representation of an embodiment of a
  • FIG. 8 is a schematic representation of an embodiment of a
  • FIG. 1 schematically shows an exemplary embodiment of a system for treating residual concrete water 12, designated overall by reference numeral 10, which is obtained as waste water 14 in fresh concrete production and contains fresh return or residual concrete.
  • the system 10 comprises a collecting device 16 in the form of a collecting basin 18 for collecting the residual concrete water 12.
  • Water is used to clean a concrete mixing plant 20 or a truck mixer 22, in particular fresh water, in order to rinse out not yet set concrete from the concrete mixing plant 20 or the truck mixer 22.
  • the wastewater 14 is conducted into the collecting basin 18 and temporarily stored there.
  • the residual concrete water 12 is moved in the collecting device 16 with a movement device 24 in order to keep fine particles in the remaining concrete water 12 in suspension and to prevent silting up of the collecting device 16.
  • the movement device 24 can in particular be designed in the form of a stirring device 26.
  • the residual concrete water 12 is conducted from the collecting device 16 to a cleaning device 28 for cleaning the residual concrete water 12.
  • the cleaning device 28 is designed for cleaning the residual concrete water 12 by separating sedimentable solids 30. It can in particular be designed in one or more stages.
  • the separated or removed, sedimentable solids 30 are fed to a solidification device 32.
  • the solidification device 32 forms solid bodies 34 from the separated solids 30.
  • the solid bodies 34 are transferred from the solidification device 32 to a shredding device 36 included in the system 10.
  • the shredding device 36 is designed to shred the solids 34 into solids 38. These solids 38 can in turn be fed to the concrete mixing plant 20 as a raw material.
  • the cleaned concrete residual water 12 which is largely freed of the sedimentable solids, is fed to the collection device 16 as so-called residual water 40.
  • residual water 40 As a result, the density of the residual concrete water 12 collected in the collecting device 16 can be reduced.
  • the system 10 can comprise a water-tightness measuring device 42, with which the water-tightness of the residual concrete water 12 can be measured in the collecting device 16 or when it is fed to the cleaning device 28 or in the cleaning device 28.
  • a binder feed device 44 can optionally be provided for adding at least one binder, for example to the residual concrete water 12 before it is fed to the cleaning device 28.
  • the system 10 enables both the wastewater 14 used for cleaning a concrete mixing plant 20 or a truck mixer truck 22 and enriched with fresh back or residual concrete to be cleaned and both the wastewater 14 sedimentable solids 30 as well as the residual water 40 can be used essentially completely.
  • a closed circuit can be formed for both the water and the sedimentable solids 30. This significantly reduces the amount of waste that can no longer be used in the production of concrete.
  • FIG. 1 The schematic structure of the system 10 is shown in somewhat more detail in FIG. The parts shown in Figure 1 and described above and Devices of the system 10 are identified in FIG. 2 with identical reference symbols. Optional devices and components of the system 10 are shown in dashed lines in FIG.
  • the solidification device 32 can comprise a solid body unit 46 for forming solid bodies 34.
  • the solid body unit 46 can be designed in the form of a plate hardener 48 for forming plate-shaped solid bodies 34.
  • the solidification device 32 can also comprise a solid grain unit 50.
  • solid particles 38 are formed directly from the sedimentable solids 30.
  • the solid particle unit 50 can comprise suitable matrices for producing pellet-shaped solid particles 38, for example, through which the enriched sedimentable solids 30 are pressed.
  • Other forms for the formation of solid particles 38 are also conceivable, for example forms into which the sedimentable solids 30 are poured and pressed into solid particles 38, for example in the form of pebbles.
  • the comminution device 36 can optionally also be dispensed with.
  • the consolidation device 32 and the comminution device 36 are preferably designed for producing solid particles 38 with an average particle size in a range from approximately 4 mm to approximately 50 mm.
  • the average grain size is advantageously in a range from approximately 6 mm to approximately 25 mm.
  • the solid grains 38 can thus be fed to the fresh concrete production as a pebble-like material.
  • the system 10 can in particular comprise a control and / or regulating device 52. Interacting with this or encompassed by it can further be an input device 54 for specifying the average grain size of the solid particles 38.
  • the control and / or regulating device 52 is there Here, it is optionally designed to work together with the solidification device 32, in particular with the solid particle unit 50, and with the comminution device 36. A user of the system 10 can thus easily specify the desired average grain size.
  • the comminution device 36 and also the solidification device 32 for forming solid particles 38 can then be mechanically adapted in particular in such a way that the solid particles 38 formed have the desired mean particle size.
  • the comminution device 36 can in particular be designed in the form of a mechanical comminution device 36.
  • this can comprise one or more crusher rollers 56 and / or one or more press rams 58 in order to comminute the solids 34, which have not yet been comminuted to the size of the desired solids 38, in the desired manner.
  • the cleaning device 28 can in particular be designed in one or more stages and comprise one or more cleaning stages 60, 62 and 64.
  • the cleaning stages 62 and 64 are shown in broken lines as optional cleaning stages.
  • the cleaning device 28 can in particular comprise a separating device 66 for separating the sedimentable solids 30 from the residual concrete water 12.
  • the separating device 66 makes it possible in particular to separate or remove the fine and / or suspended particles from the residual concrete water 12.
  • a corresponding separating device 66, 68 or 70 can be assigned to each cleaning stage 60, 62 and 64.
  • the cleaning stages 60, 62, 64 can also include the separation devices 66, 68 and 70 ⁇ m.
  • the cleaning device 28 can in particular comprise separation devices 66, 68 and 70 in the form of inclined clarifiers, lamella clarifiers and / or hydrocyclones. These devices enable the finest particles and suspended matter to be separated from the residual concrete water 12 in a simple manner.
  • the solidification device 32 can include a pressing device 72 with which the separated or removed sedimentable solids 30 from the concrete residual water can be pressed or pressed into solid bodies 34 or solid particles 38.
  • the pressing device 72 can be, in particular, a mechanical press for forming plate-shaped solid bodies 34, which can be further reduced to solid particles 38, or a die press in order to directly form solid particles 38 by pressing.
  • system 10 can optionally include a drying device 74.
  • This can be designed in particular to dry the solid particles 38 formed by the solidification device 32. Accordingly, it is connected downstream of the solidification device 32.
  • the drying device 74 can be connected upstream or downstream of the comminution device 36. There is therefore the option of drying the solids 34 still to be comminuted before comminution or drying the already comminuted solids 38.
  • system 10 can optionally comprise a thickening device 76 for thickening the separated sedimentable solids 30.
  • the thickening device 76 can in particular be connected upstream of the consolidation device 32.
  • the system 10 can comprise a filter device 78.
  • the cleaned loading Residual clay water 12, and thus the residual water 40, which is released by the cleaning device 28, can be filtered and further cleaned in this way.
  • the system 10 further comprises a residual water collection and / or residual water storage device 80 for collecting and / or storing the residual water 40.
  • a residual water collection container 82 for collecting and / or storing the residual water 40.
  • a watertightness measuring device 84 can be formed in the residual water collecting and / or residual water storage device 80, which is connected to the control and / or regulating device 52.
  • a water density of the residual water 40 can be determined and in particular the cleaning device 28, which is designed to interact with the control and / or regulating device 52, can be controlled and / or regulated accordingly.
  • a residual water supply device 86 can also be provided.
  • several such residual water supply devices 86 can also be provided, in particular also for supplying residual water 40 from the residual water collection and / or residual water storage device 80 to the cleaning device 28.
  • the system may further include a pH meter 88 for measuring a pH of the residual water 40.
  • the pH value measuring device 88 can be arranged or formed in the residual water collection and / or residual water storage device 80. It is optionally coupled to the control and / or regulating device 52 in order to transmit the measured pH value of the residual water 40 to it.
  • the measured pH value can be used in particular to neutralize or essentially neutralize the residual water 40 with an optional neutralization device 90, in particular automatically, specifically in particular as a function of the pH value measured with the pH value measuring device 88.
  • the neutralization device 90 can in particular be controlled by the control and / or regulating device 52.
  • the water-tightness measuring device 42 already described above for measuring a density of the residual concrete water 12 can in particular be arranged or formed in the cleaning device 28. It can be designed for the continuous or discontinuous measurement of the water density.
  • the measured water density value can be transmitted to the control and / or regulating device 52 coupled to the water density measuring device 42.
  • the control and / or regulating device 52 can in particular be a
  • the control and / or regulating device 52 is designed in particular to control and / or regulate the cleaning device 28 in such a way that the residual concrete water 12 is cleaned until an actual water density value of the cleaned residual concrete water 12 measured with one of the water resistance measuring devices 42 or 84 or the residual water 40 corresponds to the water density setpoint or is smaller than the specified water density setpoint.
  • the optional binder feed device 44 can feed binders to the residual concrete water 12 upstream of the cleaning device 28.
  • a further binder feed device 44 can also be arranged such that it adds binder to the solid particles 38 formed. It can therefore also be connected downstream of the solidification device 32, in particular the solid grain unit 50, or the comminution device 36.
  • the binder feed devices 44 can be connected upstream of the optional drying devices 74. This allows the solid particles 38 to dry with the added binder.
  • the binder supply device 44 can in particular be designed in the form of a cement supply device in order to supply the concrete residual water 12 or the separated solids 30 and / or the solid particles 38 in the desired amount of binder in the form of cement.
  • the system 10 can comprise a filler and / or insulating material supply device 94 in order to supply one or more fillers and / or one or more insulating materials to the solid particles 38, specifically before they are formed, that is to say in particular upstream of the solidification device 32 or before it downstream.
  • the above-described methods for treating residual concrete water 12 can be carried out in particular.
  • the sedimentable solids 30 are formed into solid bodies 34 or into solid bodies 38. If the solids 34 are larger than the desired solids, the solids 34 are comminuted as an alternative to solids 38.
  • FIG. 4 shows an expanded flow diagram of an exemplary embodiment of a method.
  • Collected residual concrete water 12 is cleaned and the sedimentable solids 30 are separated by cleaning. As shown in FIG. 3 and described above, these can be further processed into solid particles 38.
  • the residual water 40 obtained during cleaning can in particular be supplied to the residual concrete water 12 in order to lower the density of the residual concrete water 12.
  • the residual water 40 can also be filtered before it is added to the residual concrete water 12.
  • a self-contained water circuit for treating the residual concrete water 12 can be be formed. Water losses in this circuit can be compensated for by adding fresh water, for example.
  • FIG. 5 schematically shows a further exemplary embodiment of a system for treating residual concrete water 12, designated overall by reference numeral 10, which is produced as wastewater 14 in fresh concrete production and contains fresh return or residual concrete.
  • the same reference symbols are used to designate the system 10 and its components as in connection with the exemplary embodiments of the system 10 described above
  • the further exemplary embodiment of the system 10 comprises a collecting device 16 in the form of a collecting basin 18 for collecting the residual concrete water 12.
  • the water used to clean the concrete mixing plant 20 or a truck mixer truck 22 is conducted as waste water 14 into the collecting basin 18 and temporarily stored there.
  • the movement device 24 With the movement device 24, the residual concrete water 12 is moved in order to keep fine particles in suspension and to avoid silting up of the collecting device 16.
  • the movement device 24 comprises a stirring device 26.
  • the residual concrete water 12 is led out of the collecting container 16 through a connecting line 102 to the consolidation device 32.
  • a water-tightness measuring device 42 and a first valve 104 are interposed in the connecting line 102, on the one hand to determine a water tightness in the residual concrete water 12 and on the other hand to open or close the connecting line 102 if necessary .
  • the consolidation device 32 is connected to the collecting device 16 again via a further connecting line 106. Through the connecting line 106, residual water 40 removed from the residual concrete water 12 can be directed back from the consolidation device 32 into the collecting basin 18.
  • a second valve is arranged in the connecting line 106 in order to open or close it if necessary.
  • the connecting line 102 and the connecting line 106 are connected to one another via a bypass line 110.
  • the bypass line 110 is fluidly connected to the connecting line 102 between the water-tightness measuring device 42 and the first valve 104, and between the second valve 108 and the collecting basin 18 to the connecting line 106.
  • a third valve 112 is provided in the bypass line 110 for opening and closing it. assigns.
  • the consolidation device 32 is designed in the form of a filter press 114. This cleans the residual concrete water 12 and solidifies the sediments and fine particles contained therein to form solid bodies 34, which are in particular in the form of filter cakes 116.
  • the water-tightness measuring device 42 serves to continuously determine the water density of the incoming concrete residual water 12 while the concrete residual water 12 is being pumped by the pump 100 from the collecting basin 18 to the consolidating device 32.
  • the three valves 104, 108 and 112 provided allow, in particular, an operator of the system 10 to decide from which water density the residual concrete water 12 is cleaned.
  • the system can be controlled in such a way that when a predetermined water density, which is determined by the water density measuring device 42, is exceeded, for example at a density of at least 1.07 kg / l, the first valve 104 is opened and that Concrete residual water 12 gets into the filter press 114.
  • the third valve 112 is closed.
  • the consolidation device 32 is put into operation and the sediments contained in the residual concrete water 12 are removed from the residual concrete water 12 by filtering and simultaneous pressing.
  • the cleaned residual water 40 is returned to the collecting basin 18 through the connecting line 110 when the second valve 108 is open.
  • the solidification device 32 stops when the water density falls below the predefined limit value, which is determined by the water-tightness measuring device 42.
  • the operation can be interrupted, for example, for an adjustable time, in particular 30 minutes.
  • a measurement of the water density is carried out automatically with the water density measuring device 42.
  • the first valve 104 and the second valve 108 are closed, but the third valve 112 is open, so that the residual concrete water 12 through the connecting line 102, the water-tightness measuring device 42, the connecting line 110 and the connecting line 106 back into the collecting tank. 18 can flow.
  • operation of the pump 100 can either be interrupted for a specific predefinable time, for example for five minutes or for ten minutes, and then restarted again in order to determine the water density in the residual concrete water 12 to determine in the manner described. If the predetermined limit value of the water density is exceeded again, the third valve 112 is closed and the first valve 104 and the second valve 108 are opened again and the operation of the filter press 114 is started.
  • the filter press 114 generates a filter cake 116 from the sediments remaining in the residual concrete water 12.
  • This cake cake typically has a residual moisture content of approximately 45% to approximately 50%.
  • the comminution device 36 is arranged directly below or below the filter press 114. At least one comminution element 120 is arranged or formed therein in order to comminute the solid body falling out of the filter press 114 in the form of the filter cake 116.
  • the comminution device 36 can in particular comprise a plurality of comminution elements 120 in the form of worm shafts 122.
  • a drive device 124 is arranged and designed to cooperate with the comminution elements 120 in order to rotate the worm shafts 122 about their longitudinal axis 126.
  • the shredding elements 120 are arranged in a shredding chamber 128, which comprises a plurality of shredding chamber walls 130 and in particular a bottom 132.
  • the comminution chamber walls 130 and the bottom 132 delimit a comminution space 129, in which the comminution of the solid bodies 34 is carried out.
  • a solid grain outlet 134 is arranged in the bottom 132 and can optionally be closed with a closure flap.
  • the solid particles 38 formed in the comminution device 36 also referred to as granulator 136, can be discharged through the solid particle outlet 134.
  • Both inner wall surfaces 138 and the comminuting elements 120 are provided with a solid-body non-stick coating 140 in order to prevent the filter cake 116 and the solid particles 138 comminuted therefrom from sticking or caking. It is thus possible, in particular, to transfer the filter cake 116, ie the solid body 34, directly from the solidification device 32 to the comminution device 36 without an additional transport device.
  • a consolidation device outlet 142 can be provided at the bottom of the consolidation device 32, which outlet is closed, for example, with a closure flap while the consolidation device 32 is operated.
  • the closure flap is opened to discharge the formed filter cake 116 in order to expose the solidification device outlet 142, so that the filter cake 116, and consequently the solid body 34, from the solidification device solely on account of the gravity force 118 acting on it, that is to say only by its weight 32 can fall into the shredding device 36 through a filling opening 144 thereof into the shredding chamber 128.
  • a conventional transport container such as that used, for example, as an overseas container, is sufficient to accommodate the consolidation device 32 and the comminution device 36, as well as the valves 104, 108 and 112.
  • Corresponding connections can then be provided on the transport container can be fluidly connected to the connecting lines 106 and 102 NEN.
  • the bypass line 110 can also be arranged on such a container. Such an arrangement enables, in particular, mobile use of the system 10.
  • FIG. 6 shows a further exemplary embodiment of a system 10, in which the same reference numerals are used to designate identical or similar components as in the exemplary embodiment described in connection with FIG. 5.
  • the control and / or regulating device 52 is used in particular to control and / or regulate the system 10, which, in particular via control lines, is effective for control purposes with the water-resistance measuring device 42, the first valve 104, the second valve 108, the third valve 112, the drive device 124 , a drive device 150 of the consolidation device 32 and of the movement device 24 is connected in a control-effective manner in order to start, operate and operate the described components in the desired manner.
  • the collecting device 16 can in particular have an inlet 152 for the waste water 14, an outlet 154, which is fluidly connected to the connecting line 148 for discharging residual concrete water 12 by means of the pump 146 to the concrete mixing plant 20, and a remaining concrete water outlet 156, which is connected to the connecting line 102 fluidly connected.
  • a residual water inlet 158 which is fluidly connected to the connecting line 106, can optionally be provided on the collecting device 16.
  • the operation of the system 10 is controlled and / or regulated by means of the control and / or regulating device 52.
  • an input device can optionally be provided in order to store a desired limit value for the water density for starting the consolidation device 32. The system 10 can then automatically perform the operation described above.
  • FIG. 1 A schematic illustration of an exemplary embodiment of a comminution device 36 is shown in FIG.
  • the comminution device 36 comprises a comminution chamber 128 with comminution chamber walls 130, one of which is designed in the form of a bottom 132 and which delimit a comminution space 129.
  • Four shredding elements 120 in the form of worm shafts 122 rotating about their longitudinal axes 126 are arranged in the shredding chamber 128.
  • the four worm shafts 122 are aligned with their longitudinal axes 126 parallel to one another.
  • the worm shafts comprise a cylindrical shaft 160 which carries a spiral 162, on the edge of which extends away from the longitudinal axis, a plurality of comminution members 166 in the form of saw teeth 168 are formed.
  • Both inner wall surfaces 138 of the comminution chamber walls 130 and the worm shafts 122 are optionally provided with a solid-body non-stick coating 140. This prevents the solid body 34 to be comminuted and the comminuted solid particles 38 from adhering.
  • a filling funnel 170 which has a filling funnel inlet 172 and a filling funnel outlet 174, can be arranged between the solidification device outlet 142 and the filling opening 144 for simple introduction of the solid bodies 34 into the comminution device 36 having.
  • the hopper inlet 172 has a larger free cross-sectional area than the hopper outlet 174.
  • the hopper inlet 172 faces the solidification device outlet 142 and is arranged below it in relation to the direction of gravity.
  • the filling funnel outlet 174 faces the filling opening 144 and is arranged above it in the direction of gravity.
  • An inner hopper surface 176 is preferably also provided with a solid non-stick coating 140 in order to prevent the solid bodies 34 from sticking when it comes into contact with the inner hopper surface 176 and to enable the system 10 to operate safely and continuously.
  • the solid-body non-stick coating 140 is formed, for example, from one or more plastics, at least one ceramic and / or from at least one metal.
  • polyethylene and here in particular ultra-high molecular weight polyethylene (UHMWPE), urethane and / or polyurethane (PU) or combinations of these plastics can be used as plastics.
  • UHMWPE ultra-high molecular weight polyethylene
  • PU polyurethane
  • a suitable non-stick solid body coating can be formed, for example, from TempCoat 1023 from Impregion. It is a special fluoropolymer system with good non-stick and gliding properties.
  • ultra-high molecular weight polyethylene marketed by ThyssenKrupp is used as a solid non-stick coating 140, in particular under the name PE 1000.
  • urethane coatings from Tandem Products, Inc. under the "RHINO HYDE ® " brand.
  • the crushing elements 120 and / or the inner hopper surfaces 176 and / or the wall surfaces 138 of the crushing chamber walls 130 can be coated with zinc.
  • the solid-body non-stick coating 140 advantageously shows not only the desired non-stick properties, but also sufficiently good sliding properties which enable the solid bodies 34 and the solid grains 38 to slide off optimally on the named surfaces of the comminution device 36 and the optional filling funnel 170.
  • An essential component of the systems 10 are the comminution device 36 or the solidification device 32, which make it possible to use the sedimentable solids 30, which previously had to be disposed of as hazardous waste in a time-consuming or costly manner, to produce valuable raw materials for concrete production in the form of solid particles 38 or as raw materials in the form of solid bodies 34 form.

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Abstract

L'invention vise à améliorer un procédé de préparation d'eau résiduelle de béton, laquelle est recueillie lors de la production de béton frais en tant qu'eau usée et contient du béton rejeté ou résiduel, procédé selon lequel l'eau résiduelle de béton est collectée et nettoyée, les matières solides sédimentables y contenues sont séparées ou éliminées lors du nettoyage de l'eau résiduelle de béton, et des corps solides sont formés à partir des matières solides sédimentées séparées ou éliminées, de manière à réduire la quantité de matières sédimentables inexploitables à éliminer, les corps solides étant broyés en grains solides. À cet effet, selon l'invention, le dispositif de broyage du dispositif de consolidation est disposé ou réalisé directement en aval du dispositif de consolidation sans intercalage d'un système d'acheminement. L'invention concerne en outre un système amélioré de préparation d'eau résiduelle de béton.
PCT/EP2019/071290 2018-08-08 2019-08-08 Dispositif et système de préparation d'eau résiduelle de béton WO2020030729A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11325135B1 (en) * 2021-09-01 2022-05-10 Michael Robert Dehart Production of alternative supplemental cementitious material from uncured concrete made with Portland cement
EP4197985A1 (fr) 2021-12-17 2023-06-21 HeidelbergCement AG Procédé d'utilisation des eaux résiduelles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5554297A (en) 1993-12-29 1996-09-10 Tanii Industries Co., Ltd. Process of removing surfactant from uncured concrete by flotation
EP3357581A1 (fr) * 2017-02-07 2018-08-08 Bernd Hahn Procédé et système de préparation d'eaux résiduelles du béton

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5554297A (en) 1993-12-29 1996-09-10 Tanii Industries Co., Ltd. Process of removing surfactant from uncured concrete by flotation
EP3357581A1 (fr) * 2017-02-07 2018-08-08 Bernd Hahn Procédé et système de préparation d'eaux résiduelles du béton

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11325135B1 (en) * 2021-09-01 2022-05-10 Michael Robert Dehart Production of alternative supplemental cementitious material from uncured concrete made with Portland cement
US11453011B1 (en) * 2021-09-01 2022-09-27 Michael Robert Dehart Production of alternative supplemental cementitious material from uncured concrete made with Portland cement
EP4197985A1 (fr) 2021-12-17 2023-06-21 HeidelbergCement AG Procédé d'utilisation des eaux résiduelles
WO2023110634A1 (fr) 2021-12-17 2023-06-22 Heidelbergcement Ag Procédé pour l'utilisation d'eau résiduaire

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