Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
  • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
  • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
  • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
  • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
  • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
  • B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
  • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
  • B07B1/56—Heated screens
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
  • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
  • B07B1/56—Heated screens
  • B07B1/58—Heated screens heated by heated fluid
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
  • B07B13/14—Details or accessories
  • B07B13/16—Feed or discharge arrangements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
  • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
  • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
  • B09B3/20—Agglomeration, binding or encapsulation of solid waste
  • B09B3/25—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
  • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
  • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
  • B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
  • B09C—RECLAMATION OF CONTAMINATED SOIL
  • B09C1/00—Reclamation of contaminated soil
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F11/00—Treatment of sludge; Devices therefor
  • C02F11/008—Sludge treatment by fixation or solidification
• • 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
• • 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
  • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
  • C04B22/06—Oxides, Hydroxides
  • C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
  • C04B22/064—Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
• • 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
  • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
  • C04B26/006—Waste materials as binder
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
  • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
  • B07B2201/00—Details applicable to machines for screening using sieves or gratings
  • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/02—Treatment of water, waste water, or sewage by heating
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2303/00—Specific treatment goals
  • C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2303/00—Specific treatment goals
  • C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
• • 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 process for the treatment of sludge, in particular polluted harbor sludge; it also relates to a treatment facility capable of implementing this method.
• EP-2,050,517 also discloses a process for treating contaminated water sediment material or mineral soil, consisting, after spinning, in reducing them to powder and mixing this powder with clay, urea, a hydraulic binder and aggregates. But such a process is relatively complex to implement, and it does not provide an easily recoverable product.
• the present invention provides a method for treating sludge, after extraction, in particular port sludge, to reduce their polluting character and to present them in a form likely to facilitate their recovery.
• the method according to the invention comprises the operations consisting of:
• aggregates consisting of kernels of rubble partially or completely coated with dry sludge, which can then be stored or used for example as backfill material, filler, or bedding.
• the grinding treatment of the sludge / rubble mixture is adapted to obtain a ground material of which at least 95% by weight of the aggregates obtained have dimensions of between 0 and 150 mm, more preferably between 0 and 100 mm, and even preferably between 0 and 80 mm. It is also possible to obtain smaller aggregates, for example of which 95% by weight have dimensions of between 0 and 60 mm, or more preferably between 0 and 2 mm.
• the heating treatment of the ground material, associated with the screening operation is preferably carried out at a temperature of at least 30 ° C.
• the screening treatment is adapted to obtain at least three different granulometry of ground material, by at least two screening operations, each of said screening operations being associated with a heating treatment of said ground material.
• the treatment by grinding and / or the screening treatment of the ground material is associated with an operation of suction of gas emissions, and treatment of these emanations by filtration, before discharge into the atmosphere.
• a complementary functional product is added, before the grinding operation, between this grinding operation and the screening operation, or after the screening operation, for example cement or lime, for fix and neutralize certain constituents.
• the invention also relates to the installation for the treatment of rubble, in particular of rubble mixed with sludge, suitable for implementing the method described above, this installation comprising:
• grinding means capable of grinding concrete and / or stone rubble
• screening means capable of obtaining at least two different granulometries of ground matter, which screening means are associated with heating means, and
• the grinding means are advantageously in the form of a percussion crusher whose rotor is equipped with hammers.
• the screening means are advantageously in the form of a device of the scalping type equipped with at least one screening grid provided with heating means.
• the screen or screens of the screening means are preferably each provided with heating means arranged under their lower face.
• these screening means comprise at least two superposed screening grids, each provided with heating means arranged under their lower face.
• the grinding means and / or the screening means comprise a heat engine producing exhaust gases, and the heating means of said screening means are in the form of a pipeline (s) fed by said exhaust gases.
• At least the grinding means and / or the screening means of the installation are equipped with a covering system and / or cowling capable of partitioning any fumes of gas, which system tarpaulin and / or The cowling is equipped with means of suction and filtration of said gas emissions.
• This system for covering and / or covering the screening means advantageously comprises vertical or substantially vertical partitioning walls arranged above the upper screening grid, which walls are arranged to form gas retention cells, these cells culminating in in the upper part, to said suction and filtration means mentioned above.
• the installation comprises means for incorporating into the mixture sludge / rubble, or aggregates in the course of formation or finalized, a complementary functional product, for example cement or lime, to fix and neutralize certain constituents .
• a complementary functional product for example cement or lime
• These means may be in the form of a metering hopper, or a metering mat, provided before the grinding means, or above the transfer means, between the grinding means and the screening means. They may also be in the form of a mixer equipped with a metering device positioned at the outlet of the screening means.
• FIG. 1 is a schematic top view of a treatment plant according to the present invention.
• FIG. 2 is a schematic side view of the processing installation illustrated in FIG.
• the installation 1 comprises grinding means 2 capable of grinding rubbish of any kind, such as concrete, rock, stones, bitumen, all coming followed by means 3 which make it possible to transfer the ground materials obtained in the direction of screening means 4, adapted to obtain at least two different granulometries of ground material, these screening means 4 being associated with heating means 5.
• grinding means 2 capable of grinding rubbish of any kind, such as concrete, rock, stones, bitumen, all coming followed by means 3 which make it possible to transfer the ground materials obtained in the direction of screening means 4, adapted to obtain at least two different granulometries of ground material, these screening means 4 being associated with heating means 5.
• the grinding means 2 consist of a crusher type material, adapted to reduce large rocks, stones or concrete blocks, smaller rubble.
• these grinding means 2 consist of a material known under the name of impact mill, or percussion crusher, provided with a hammer rotor 6, associated with one or more impact screens 7, for example two in number.
• Such impact crushers are commonly used in mines and quarries in particular.
• They are suitable for grinding materials whose particle size can be up to several hundred millimeters, for example up to 800 mm, and, after treatment, to obtain grinders whose particle size ranges from 0 to several tens of millimeters for example 80 mm.
• the grinding means 2 comprise a motorized feed belt 8, vibrating or not, to supply the rotor 6 with products to be treated, and a motorized exit belt 3, for the discharge of the ground materials obtained, corresponding here to the means transfer to the screening means 4.
• the grinding means 2 further comprise a heat engine 9 for driving its various moving parts (in particular the rotor 6 and the two motorized belts 3 and 8), this heat engine 9 comprising an evacuation pipe 10 for channeling its operating gases. 'exhaust.
• the screening means 4 arranged after the impact crusher 2 are fed by the motorized transfer belt 3.
• These screening means 4 consist of a material adapted to screen and sort the materials, in order to obtain at least two ranges of different particle size.
• They consist more particularly of a material of the scalping type, provided with at least one vibrating screening grid (diagrammed at 1 1 in FIGS. 1 and 2).
• the screening means 4 comprise two superimposed screening grids, to obtain three ranges of different particle size, the sorted grinds of each of these ranges of grain size being discharged by their own motorized belt 12, 13, 14.
• screening means 4 can allow the sorting of materials according to the following three ranges of particle size: 0/6 mm - 6/30 mm and 30/80 mm.
• the screening means 4 comprise a heat engine 15 for the implementation in particular of the vibrating grids 1 1 and the conveyor belts 12, 13, 14.
• This heat engine 15 comprises a discharge pipe 16 for channeling its exhaust gas.
• the screening means 4 are here associated with heating means 5 for heating the materials being screened.
• These heating means 5 are provided at least under the upper screening grid, adapted to not interfere with the passage of materials by gravity, and preferably under the two vibrating grids.
• the heating pipe or ducts 17 are in this case connected to the exhaust gas discharge pipes 10 and 16 of the heat engines 9 and 15, for using these exhaust gases as a heating fluid.
• the temperature of these exhaust gases is higher than the ambient temperature and can rise to a few tens to a few hundred degrees.
• the heating pipe or ducts 17 lead to a muffler 18, for example of the catalytic type or with filter (s) complementary (s).
• the grinding means 2, the screening means 4, and the transfer means 3 and possibly the inlet and outlet belts 12, 13, 14 are covered by a system 20 tarpaulin and / or cowling, which is adapted to partition the atmosphere around the materials being treated, or transfer, and which is associated with means 21 for suction and filtration.
• the system 20 sheeting / cowling allows to partition possible emanations of polluting gases; and the suction / filtration means 21 make it possible to treat these possible emanations of polluting gases before they are discharged into the atmosphere.
• the system 20 of tarpaulin / cowling can be achieved by means of flexible plastic sheeting, and / or by means of metal sheets, suitably arranged over and on the sides of the various parts of the installation that is to be fitted. .
• this system 20 tarpaulin / cowling is equipped with suction / filtration means 21 above, suitably arranged to best deal with any emissions of polluting gases.
• suction / filtration means 21 consist of conventional systems of the suction turbine type, or exhaust fan, equipped with suitable filters, for example of the coal type or other.
• suction / filtration modules 21 are judiciously distributed over the entire rollover / covering system 20, so as to allow the treatment of all or almost all the volume of gas recovered.
• the roofing / covering system 20 has vertical partition walls 22, internal, which are arranged at an angle and in a staggered manner, above the upper screening grid.
• partition walls 22, disposed within the system 20 tarpaulin / cowling, are adapted to form gas retention cells, leading in the upper part to the aforementioned means 21 suction / filtration.
• the installation 1 may comprise means for separating and setting aside the metal elements present in the rubble or the sludge, for example in the form of magnetic mats, disposed above the motorized belt 3.
• the grinding means 2 before the grinding means 2, between the grinding means 2 and the screening means 4, or after the screening means 4, provision may be made for the presence of means for incorporating into the grind a functional product, in liquid or powder form, for example, to fix and neutralize certain pollutants.
• means for incorporating into the grind a functional product in liquid or powder form, for example, to fix and neutralize certain pollutants.
• the incorporation of cement or lime for example at a rate of 0.2 to 5% of the weight of the sludge, may be provided to neutralize the heavy metals in particular.
• the installation may comprise for this purpose a metering hopper or a measuring mat, above the feed belt 8 or above the transfer belt 3 (between the milling means 2 and the screening means 4).
• This plant 1 is particularly suitable for treating sludge, in particular of port origin, as described below.
• these sludges in liquid or semi-liquid form are mixed with rubbish containing in particular concrete and / or stone rubble, and / or everything coming with possibly earthy materials, after a first sorting to eliminate any detritus or bulky.
• Coarse pre-mixing can be achieved by pouring sludge on the pile of rubble so that the sludge begins to permeate the rubble.
• this premixing is carried out at the rate of one volume of sludge for 0.5 to 3 volumes of rubble; the corresponding ratio is determined during the implementation of the process, according to the structural and physicochemical characteristics of the sludge to be treated.
• this premix is poured onto the motorized belt 8 to feed the impact crusher 2 to ensure the desired operation of grinding materials.
• the impact crusher 2 reduces the size of the reported rubble and performs / complete the mixture between these rubbish and sludge, the latter being fixed on rubbish or completely coating them. This grinding operation partially dries the sludge.
• the quantities of sludge and rubble mixed, as well as the grinding characteristics applied, in terms of size reduction, are adapted to obtain, for the most part, particles or aggregates formed of a core of gravel at least partially embedded in mud. .
• the corresponding rubble / sludge mill is supported by the transfer means 3 to undergo a screening operation by the screening means 4, in order to perform the desired sorting operation, in which it will simultaneously undergo a heating operation ensuring the drying and fixing of the mud on the stones of rubble.
• the heating in question is carried out at a temperature above 20 ° C, and more preferably above 30 ° C, on the vibrating grids 11.
• the sorting of the crushed granules makes it possible to obtain different particle size ranges, each of these ranges being recovered and discharged by one of the motorized belts 12, 13, 14.
• the three corresponding grain size ranges can be 0/6 mm, 6/30 mm and 30/80 mm.
• the grinding treatment promotes the coating of the crushed rubble with the sludge, and also promotes the formation of gaseous fumes loaded with pollutants, for their treatment by the filtering means 21.
• the screening operation associated with the heating treatment, also promotes the formation of these gaseous fumes subsequently treated by the filtering means 21.
• particles or granules formed are formed from a hard stone core partially or wholly coated with a dry layer of sludge, these particles possibly being very small (of the order of a millimeter, or even less). , of medium size (a few millimeters), or of larger size (a few centimeters). These particles are devoid or virtually odorless and they are likely to be valued, for example as backfill material, load or laying bed for pipes in particular.
• a first pass / cycle makes it possible to check the result obtained and, possibly, to determine the interest of adding a complementary functional product, before, after or between the grinding and screening means, for example cement or lime.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Ceramic Engineering (AREA)
• Environmental & Geological Engineering (AREA)
• Organic Chemistry (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Materials Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Food Science & Technology (AREA)
• Soil Sciences (AREA)
• Hydrology & Water Resources (AREA)
• Water Supply & Treatment (AREA)
• Thermal Sciences (AREA)
• Physics & Mathematics (AREA)
• Inorganic Chemistry (AREA)
• Processing Of Solid Wastes (AREA)
• Treatment Of Sludge (AREA)

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• 2013
  • 2013-07-03 FR FR1356515A patent/FR3008006B1/fr not_active Expired - Fee Related
• 2014
  • 2014-06-30 CN CN201480037358.XA patent/CN105408262A/zh active Pending
  • 2014-06-30 WO PCT/FR2014/051673 patent/WO2015001239A1/fr active Application Filing
  • 2014-06-30 US US14/902,531 patent/US20160376195A1/en not_active Abandoned
  • 2014-06-30 EP EP14745196.7A patent/EP3016914A1/de not_active Withdrawn

Non-Patent Citations (2)

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