EP3301360B1 - Procédé et installation de traitement de cendres d'une installation d'incinération de déchets - Google Patents

Procédé et installation de traitement de cendres d'une installation d'incinération de déchets Download PDF

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Publication number
EP3301360B1
EP3301360B1 EP17191311.4A EP17191311A EP3301360B1 EP 3301360 B1 EP3301360 B1 EP 3301360B1 EP 17191311 A EP17191311 A EP 17191311A EP 3301360 B1 EP3301360 B1 EP 3301360B1
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Prior art keywords
water
stage
fraction
classification
hydrocyclone
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EP17191311.4A
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German (de)
English (en)
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EP3301360A3 (fr
EP3301360A2 (fr
Inventor
Manfred Klinkhammer
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Schauenburg Maschinen-Und Anlagen-Bau GmbH
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Schauenburg Maschinen-Und Anlagen-Bau GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • 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
    • B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2700/00—Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators
    • F23J2700/001—Ash removal, handling and treatment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01001—Sorting and classifying ashes or fly-ashes from the combustion chamber before further treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01004—Separating water from ash
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/01005—Mixing water to ash

Definitions

  • the invention relates to a method and a plant for the treatment of ash from waste incineration plants.
  • the ash is in particular domestic waste incineration ash (HMVA).
  • the aim is to separate the ash so that several differently contaminated with pollutants fractions (fractions) of the ash. While highly polluted components must be disposed of in a costly manner, less heavily polluted and possibly unencumbered components can be profitably recycled. Of particular importance in the treatment of ash is the extraction of ferrous and non-ferrous metals from the ashes, which are particularly profitable.
  • the treatment of household garbage ash is carried out in a wet classification process.
  • the ash is mixed with liquid.
  • Classification is understood as meaning a separation of a starting material consisting of particles with a given particle size distribution into a plurality of fractions of different particle size distribution.
  • the classification serves, for example, to separate the ashes into different proportions of pollutants.
  • a method of treating ash by wet classification is known in which the ash is first mixed with liquid in a slurry tank and, after screening a coarse fraction, is fed as a feed stream to a classifier having an upstream classifier and an upstream hydrocyclone.
  • the feed stream comprises a particle size distribution between 0 and 4 mm.
  • Feinstteilchen be deposited.
  • a residual fraction having a particle size between 0 mm and 0.25 mm is withdrawn as suspension.
  • a Gutfr so with a grain spectrum between 0.25 mm and 4 mm is deducted.
  • the good fraction can be landfilled without environmental requirements or possibly also be used economically.
  • the residual fraction contains pollutants such as heavy metals. It must be disposed of in compliance with legal regulations.
  • a process for the treatment of ash from waste incineration plants is known in which the classifying stage also has an upstream classifier and an upstream hydrocyclone plant.
  • the good fraction is taken off at the bottom of the fluidized bed and dewatered by means of a sieve.
  • the screen passage of the screening device is returned to the hydrocyclone plant.
  • the invention has for its object to make the treatment of ash from waste incineration plants such that the treatment plants can be operated with an even higher economic efficiency.
  • the ash is classified into a first coarse fraction and a fine fraction.
  • the classification is done for example by a sizing. Water is needed for the classification. In particular, the water provides the driving force required to drive the ashes through the first classifier stage.
  • the fine fraction is preferably fed to a further treatment.
  • the first coarse fraction is fed to a second classification stage and subjected there to a control classification.
  • This classification is carried out with the addition of water, in which case the water provides the required driving force.
  • a residual fraction is separated.
  • the task of the control classification is to ensure that the first coarse fraction coming from the first classification stage actually has the desired particle size distribution. In practice, it often occurs that the first coarse fraction after the first classification stage still contains a (small) proportion of a smaller fraction. This proportion with the smaller fraction is undesirable. He can make sure that the first coarse fraction becomes less usable or even unusable.
  • the water of the first classification stage is conducted in a first water cycle and the water of the control classification in a second water cycle.
  • the invention is based on the following consideration.
  • the operation of the first classification stage in a first water cycle is known.
  • the first coarse fraction is subjected to a control classification in a second classification step and the control classification is carried out with the water of the first water cycle
  • the first water cycle accumulates with salts. This salt accumulation is undesirable.
  • the water which is guided in the substantially closed first water cycle, reaches a critical limit of pollutants (salts). When the limit is reached, all the water must be changed and disposed of. This is a typical plant by an order of 200 cubic meters.
  • the first coarse fraction is also enriched with pollutants, especially with salts. This leads to a limitation of the usability of the first coarse fraction up to a non-usability.
  • the invention is based on the finding that the first coarse fraction after the first classification stage through the water Chlorides and sulfates is largely purified.
  • the already cleaned first coarse fraction should not - as in the prior art - be contaminated by renewed contact with polluted water.
  • a second water cycle is provided in a departure from known technologies for this purpose, which is independent of the first water cycle.
  • the second water cycle due to the already cleaned first coarse fraction, has to be replaced much later than the first water cycle.
  • the second water cycle is changed at most half as often as the first water cycle. Initial tests have shown that the second water cycle can be operated much longer without water exchange.
  • a further advantage is that the quality of the remaining (thus reduced by the residual fraction) first coarse fraction is excellent. This applies to the particle size distribution and even more so for the low or nonexistent pollutant load of the remaining first coarse fraction. It is possible to easily recycle the remaining first coarse fraction. For this purpose, it is forfeited and later used, for example, for the construction of dams or in road construction.
  • the savings by the inventive method are significant and justified by the fact that less water must be replaced in larger cycles.
  • the water of the second water cycle can run longer and must be replaced less frequently.
  • the water of the second water cycle remains at least three times, preferably at least four times, as long in the circulation as the water of the first water cycle, before it is exchanged.
  • the water of the second classification stage is collected after the control classification and at least partially returned to the control classification.
  • the collecting may take place in a collecting device such as a tub.
  • the residual fraction the is pumped by a pump.
  • the residual fraction preferably has a residual moisture content of about 6% to 8%.
  • the remaining water is driven in the second cycle.
  • the second classification stage by means of a curved screen lightweight materials are removed before the water is returned to the Kontrollklass ist.
  • the lightweight materials may be unburned organic substances, such as wood or small polystyrene particles. Such substances are lighter than water and can lead to undesirable foaming. By discharging the light materials after the second classification stage foaming is prevented, so that a guiding of the water in the second water cycle is easily possible.
  • the water is collected before being pumped back to the second classification stage.
  • a storage container can be used.
  • the residual fraction is separated from the first coarse fraction. This is a false grain portion.
  • the remaining first coarse fraction can be fed directly into the appropriate grain size (without false grain) of the recovery.
  • a preferred embodiment of the invention is characterized in that in the second classification stage from the first coarse fraction at least a second Coarse fraction is deposited, which comprises only a lower particle size range of the first coarse fraction. It is thus separated from the first coarse fraction, a second coarse fraction having a smaller maximum grain size than the remaining first coarse fraction.
  • the coarse fraction comprises a particle size range between 4 mm and 60 mm.
  • the second classifying step can be set so that the grain size spectrum of the remaining first coarse fraction is, for example, 16 mm to 60 mm and that of the second coarse fraction is 4 mm to 16 mm.
  • the separation of a second coarse fraction, which is smaller than the remaining coarse fraction has the advantage of a more versatile recovery. This allows the different fractions to have different applications.
  • the residual fraction is separated off, which can also be referred to as a false fraction.
  • the residual fraction is collected in a collecting device and then fed to a first hydrocyclone, wherein the overflow of the first hydrocyclone is passed back into the collecting device.
  • the residual fraction is discharged and taken out of the water cycle. The largely freed from the residual fraction overflow is passed back to the collection device. In this way, the second water cycle is advantageously freed from the residual fraction.
  • the second classification stage has an iron deposition stage and / or a non-ferrous precipitation stage is / is downstream.
  • economically valuable iron and non-ferrous metals can be obtained.
  • the first and possibly the second coarse fraction is freed from the iron and non-ferrous metals, whereby they each gain in purity.
  • a fine fraction is classified within the scope of the invention in addition to the first coarse fraction.
  • the fine fraction preferably has a smaller average grain size than the first coarse fraction.
  • the fine fraction may be such that its maximum grain diameter is smaller than the minimum grain diameter of the first coarse fraction.
  • the separation section between a fine fraction and a coarse fraction is not always sharp due to the technology, so that partial intersections of the grain size spectra may also occur.
  • the fine fraction is fed to a second hydrocyclone, wherein in the second hydrocyclone, a first Feinstfr forcing is deposited as a sludge-water mixture and wherein the first Feinstfr quasi is thed after thickening of the sludge-water mixture.
  • the first ultrafine fraction advantageously has a spectrum with a smaller grain size than the fine fraction. Due to the second hydrocyclone, the first pollutant-contaminated first micro-fraction is withdrawn from the first water cycle, particularly advantageously immediately after the first classifying stage.
  • the thickening is preferably carried out in a thickener in which the sludge settles, and the water is supplied as clear water to the first classification stage.
  • the first water cycle is advantageously closed. If necessary, additional water can be added to the clear water.
  • additional water can be added to the clear water.
  • the make-up water compensates for the water loss that occurs, for example, in the removal of solids.
  • the sludge still has a residual moisture of about 30% after thickening of the sludge-water mixture. Also evaporation water must be supplemented.
  • a Aufstromsortierer is downstream of the second hydrocyclone, in which a second Feinstfr quasi is deposited.
  • the second ultrafine fraction is also taken out of the first water cycle and disposed of.
  • the ultrafine fraction preferably contains a solids content fraction between 0 mm and 0.25 mm. This fraction is contaminated with pollutants and must be disposed of.
  • the clear water is introduced as upstream water in the upstream sorter.
  • the clear water fulfills two functions particularly advantageous, namely, on the one hand, the brewing of the ash in the first classification stage and, on the other, the provision of the upflow water in the upstream sorter.
  • the first and the second ultrafine fraction are brought together before Verhaldung. They can then be thickened together and dewatered before being disposed of. Before disposal, they are preferably dumped.
  • An advantageous embodiment of the method according to the invention is characterized in that the fine fraction reduced by the first very fine fraction and possibly the second very fine fraction is dehydrated in at least one dehydration stage and purified in a purification stage. Then it can be spent on the landfill.
  • the cleaning stage is followed by at least one metal separator.
  • This achieves a high efficiency due to the purity of the metals and non-metals, which is also advantageous from an economic point of view.
  • the first hydrocyclone of the second water cycle was addressed.
  • the overflow is preferably fed back into the collector. It is considered particularly advantageous if the underflow of the first hydrocyclone is fed to the dewatering stage.
  • the plant is designed so that in the second water cycle between 25% and 50% of the total amount of water of the first and second water circulation are included.
  • An advantageous embodiment is characterized in that a metal separator is arranged between the first classifying stage and the second classifying stage. This may be a Kochbandmagnetabscheider.
  • the drawing shows a process scheme of a plant according to the invention for the treatment of ash.
  • the ash from a waste incineration plant is fed via a conveyor belt 1 into a mashing tank 2 in which the ash is mixed with water to form a water-ash mixture.
  • the grain size of the abandoned ash is about 0 mm to 60 mm.
  • the ash is fed as ash-water mixture of a first classification stage 3.
  • Via a first effervescing device 4, the ash is driven through the classifying stage 3. This results in a first coarse fraction 5 and a fine fraction 6, as indicated in the drawing of the respective strand.
  • the first coarse fraction 5 is fed to a second classification stage 7. Between the first classifying stage 3 and the second classifying stage 7, a metal separator 8 is arranged.
  • the metal separator 8 is designed as an overband magnet and arranged above a conveyor belt 9 which conveys the first coarse fraction from the first classifying stage 3 to the second classifying stage 7.
  • the second classification stage 7 has a second shower device 10.
  • the from the shower device 10th originating water drives the first coarse fraction 5 through the classification stage 7.
  • the second classifying stage 7 is provided.
  • a control classification takes place, which is to ensure that the second classification stage 7 leaving - cleaned - first coarse fraction actually has the desired particle size distribution and not additionally an undersize fraction.
  • a residual fraction 11 is separated from the first coarse fraction 5 in the control classification (see the strand marked 11 in the drawing).
  • the first coarse fraction 5 is supplied with water, which also serves as a driving force.
  • the water is conducted in a second circuit, which is independent of the first cycle in which the water of the first classification stage 3 is guided.
  • the second cycle is as follows: The water is added via the second shower device 10 to the first coarse fraction. Coming from the second classification stage 7, the water is collected in a collecting device 12 and from there via an optional curved screen 13, in which lightweight materials are removed, into a storage container 14, from which the water is pumped again via a pump 15 to the second shower device 10 becomes.
  • the residual fraction 11 collects in the collecting device in the lower section of the collecting device and is conducted via a pump 16 to a first hydrocyclone 17.
  • the overflow 18 is advantageously performed back to the collector 12. So this cycle is closed.
  • the second classification stage 7 may be designed such that only the first coarse fraction 5 is freed from the residual fraction 11.
  • the second classifying stage 7 is formed in two stages, as shown in the drawing.
  • at least one second coarse fraction 19 is deposited in the second classification stage 7 from the first coarse fraction 5, which has only a lower particle size range of the first coarse fraction.
  • Reference numeral 20 denotes the remaining first coarse fraction reduced by the second coarse fraction 19.
  • the first coarse fraction 5 has a particle size range of 4 mm to 60 mm (taking into account that the first coarse fraction also has a defective grain fraction)
  • the second coarse fraction has a particle size fraction between 4 mm and 16 mm.
  • the remaining grain size fraction 20 of the first coarse fraction is 16 mm to 60 mm.
  • At least one metal deposition stage 21 (ferrous metals and / or non-ferrous metals) is connected downstream of the second classification stage 7. This is advantageous insofar as both the second coarse fraction 19 and the remaining first coarse fraction 20 have a high Have purity, which is advantageous for the efficiency of metal deposition.
  • a fine fraction 6 having a smaller particle size spectrum is deposited in the first classification stage 3, as indicated at the outset.
  • the fine fraction 6 is passed by means of a pump 22 to a second hydrocyclone 23.
  • the underflow 24 of the second hydrocyclone enters a Aufstromsortierer 25th
  • a first ultrafine fraction 26 is deposited as a sludge-water mixture, which has a particle size fraction in the lowest range of the fine fraction 6.
  • the grain size between 0 mm and a maximum of 0.1 mm, preferably between 0 mm and a maximum of 0.07 mm amount.
  • the first ultrafine fraction 26 adheres to a large part of pollutants. It is subsequently dewatered in a dewatering stage 27 and thickened in a thickener 28 before it is dumped.
  • a second ultrafine fraction 29 is withdrawn as an overflow and also dewatered and thickened.
  • the first ultrafine fraction 26 and the second ultrafine fraction 29 are combined before they are thickened and dehydrated. This can be done in a collecting device 30.
  • the thickening of the first ultrafine fraction 26 and advantageously also of the second ultrafine fraction takes place, as stated, preferably in a thickener 28.
  • This may be a lap thickener.
  • Round thickeners can have diameters of 2 m to 3 m and beyond.
  • the finest fractions settle. This results in clear water 31, which is preferably fed as Aufstromwasser 32 the Aufstromsortierer 25 and / or shower water 33 of the shower device 4.
  • Via a line 34 supplementary water can be supplied to the first circuit. Via a line 35 supplementary water can be supplied to the second circuit.
  • the reference numeral 36 denotes a dehydration stage. In the dewatering stage of the lower reaches 37 of the Aufstromsortierers 25 is passed.
  • the first hydrocyclone 17 has an underflow 38, which is advantageously also fed to the dehydration stage.
  • the dehydration stage 36 may be followed by a post-purification stage 39, in which dehydration is also carried out. After the post-purification stage 39, at least one metal separator 40, in particular at least one iron metal separator and / or one iron metal separator, is advantageously arranged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (21)

  1. Procédé pour le traitement de cendres issues d'installations d'incinération de déchets, dans lequel
    - les cendres sont mises à disposition,
    - dans un premier étage de criblage (3), les cendres sont criblées en une première fraction grossière (5) et une fraction fine (6) par ajout d'eau qui est guidée dans un premier circuit d'eau,
    - dans un deuxième étage de criblage (7), la première fraction grossière (5) est soumise à un criblage de contrôle et une fraction résiduelle (11) est ce faisant séparée, et dans lequel
    - le criblage de contrôle s'effectue par ajout d'eau qui est guidée dans un deuxième circuit d'eau indépendant du premier circuit d'eau.
  2. Procédé selon la revendication 1, caractérisé en ce qu'entre 25 % et 50 % de la quantité d'eau totale des premier et deuxième circuits d'eau sont contenus dans le deuxième circuit d'eau.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que du métal est séparé entre le premier étage de criblage (3) et le deuxième étage de criblage (7).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'eau du deuxième étage de criblage (7) est collectée après le criblage de contrôle et est au moins partiellement de nouveau amenée au criblage de contrôle.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'après le deuxième étage de criblage (7), des matières légères sont éliminées au moyen d'un tamis courbe (13) avant de reconduire l'eau vers le criblage de contrôle, dans lequel l'eau est de préférence collectée après le tamis courbe (13) avant de la ramener par pompage vers le deuxième étage de criblage (7).
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que, dans le deuxième étage de criblage (7), on sépare de la première fraction grossière (5) au moins une deuxième fraction grossière (19) qui comprend simplement une plage de granulométrie inférieure de la première fraction grossière (5).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la fraction résiduelle (11) est collectée dans un dispositif de collecte (12) et est amenée à un premier hydrocyclone (17) et en ce que la surverse du premier hydrocyclone (17) est renvoyée dans le dispositif de collecte (12).
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce qu'en aval du deuxième étage de criblage (7) est/sont disposé(s) au moins un étage séparateur de métaux (21), en particulier un étage séparateur de fer et/ou un étage séparateur de métaux non ferreux.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la fraction fine (6) est amenée à un deuxième hydrocyclone (23), en ce que dans le deuxième hydrocyclone (23) une première fraction la plus fine (26) est séparée en tant que mélange de boue-eau et en ce que la première fraction la plus fine (26) est stockée après l'épaississement du mélange de boue-eau, dans lequel l'épaississement s'effectue de préférence dans un épaississeur (28) dans lequel la boue se dépose, et en outre l'eau en tant qu'eau claire (31) est de préférence amenée au premier étage de criblage (3).
  10. Procédé selon la revendication 9, caractérisé en ce qu'en aval du deuxième hydrocyclone (23) est disposé un classificateur à courant ascendant (25) dans lequel une deuxième fraction la plus fine (29) est séparée et dans lequel l'eau claire (31) est de préférence introduite en tant qu'eau de courant ascendant (32), dans lequel de préférence la première fraction la plus fine (26) et la deuxième fraction la plus fine (29) sont réunies avant le stockage.
  11. Procédé selon la revendication 9 ou 10, caractérisé en ce que la fraction fine (6) réduite à la première fraction la plus fine (26) et le cas échéant de la deuxième fraction la plus fine (29) est égouttée dans au moins un étage d'égouttage (36) et est nettoyée dans un étage de nettoyage (39), dans lequel de préférence au moins un séparateur de métaux (49) est disposé en aval de l'étage de nettoyage.
  12. Procédé selon la revendication 7 et la revendication 11, caractérisé en ce que la sousverse (38) du premier hydrocyclone (17) est amenée à l'étage d'égouttage (36).
  13. Installation pour le traitement de cendres issues d'installations d'incinération de déchets, avec
    - un premier étage de criblage (3) pour la production d'une première fraction grossière (5) et d'une fraction fine (6),
    - un premier dispositif d'arrosage (4) pour l'arrosage des cendres dans le premier étage de criblage avec de l'eau qui est guidée dans un premier circuit d'eau,
    - un deuxième étage de criblage (7) avec un deuxième dispositif d'arrosage (10) pour l'arrosage de la première fraction grossière (5) avec de l'eau qui est guidée dans un deuxième circuit d'eau,
    - dans laquelle les premier et deuxième circuits d'eau sont indépendants l'un de l'autre.
  14. Installation selon la revendication 13, caractérisée en ce que l'installation est étudiée de telle sorte qu'entre 25 % et 50 % de la quantité d'eau totale des premier et deuxième circuits d'eau sont contenus dans le deuxième circuit d'eau.
  15. Installation selon la revendication 13 ou 14, caractérisée en ce qu'un séparateur de métaux (8) est disposé entre le premier étage de criblage (3) et le deuxième étage de criblage (7).
  16. Installation selon l'une des revendications 13 à 15, caractérisée en ce qu'un tamis courbe (13) est disposé en aval du deuxième étage de criblage (7).
  17. Installation selon l'une des revendications 13 à 16, caractérisée en ce qu'un dispositif de collecte (12) est disposé en aval du deuxième étage de criblage (7) et un premier hydrocyclone (17) avec une surverse (18) et une sousverse (38) est disposé en aval du dispositif de collecte, et que la surverse est en ce raccordement de conduite avec le dispositif de collecte.
  18. Installation selon l'une des revendications 13 à 17, caractérisée en ce qu'en aval du deuxième étage de criblage (7) est/sont disposé(s).au moins un étage séparateur de métaux (21), en particulier un étage séparateur de fer et/ou un étage séparateur de métaux non ferreux
  19. Installation selon l'une des revendications 13 à 18, caractérisée en ce que, dans le premier circuit d'eau, un deuxième hydrocyclone (23) avec une surverse (26) et une sousverse (24) est disposé en aval du premier étage de criblage (3) et en ce qu'un épaississeur (28) est disposé en aval de la surverse, dans laquelle l'épaississeur (28) présente de préférence un dispositif d'évacuation pour évacuer de l'eau claire (31) de l'épaississeur et le dispositif d'évacuation est en raccordement de conduite avec le premier dispositif d'arrosage (4).
  20. Installation selon la revendication 19, caractérisée en ce qu'en aval du deuxième hydrocyclone (23) est disposé un classificateur à courant ascendant (25) avec une surverse (29) et une sousverse (37) dans lequel l'eau claire (31) est de préférence introduite en tant qu'eau de courant ascendant (32), dans laquelle un dispositif de collecte (30) est de préférence disposé entre le deuxième hydrocyclone (23) et l'épaississeur (28), dispositif dans lequel la surverse (26) du deuxième hydrocyclone (23) et la surverse (29) du classificateur à courant ascendant (25) sont réunies.
  21. Installation selon la revendication 17 et la revendication 20, caractérisée en ce que la sousverse (38) du premier hydrocyclone (17) est amenée vers un étage d'égouttage (36) auquel on amène également la sousverse (37) du classificateur à courant ascendant (25).
EP17191311.4A 2016-09-20 2017-09-15 Procédé et installation de traitement de cendres d'une installation d'incinération de déchets Active EP3301360B1 (fr)

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EP2113490B1 (fr) * 2008-04-28 2012-09-12 Edgar Bonnaire Procédé et dispositif de séparation mécanique de matières brutes secondaires à partir des boues contenant du fer
DE102011013030A1 (de) 2011-03-04 2012-09-06 Alexandra Beckmann Aufbereiten von Müllverbrennungsasche
DE102011013033A1 (de) * 2011-03-04 2012-09-06 Alexandra Beckmann Aufbereiten von Müllverbrennungsasche
DE102014100725B3 (de) 2013-12-23 2014-12-31 Schauenburg Maschinen- Und Anlagen-Bau Gmbh Verfahren zur Aufbereitung von Asche aus Müllverbrennungsanlagen durch Nassklassierung

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