EP0746725B1 - Procede et installation de traitement de dechets par sechage, sublimation, oxydation et combustion - Google Patents
Procede et installation de traitement de dechets par sechage, sublimation, oxydation et combustion Download PDFInfo
- Publication number
- EP0746725B1 EP0746725B1 EP95910598A EP95910598A EP0746725B1 EP 0746725 B1 EP0746725 B1 EP 0746725B1 EP 95910598 A EP95910598 A EP 95910598A EP 95910598 A EP95910598 A EP 95910598A EP 0746725 B1 EP0746725 B1 EP 0746725B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bed
- waste
- installation
- furnace
- fluidized bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001035 drying Methods 0.000 title claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 title claims description 5
- 230000003647 oxidation Effects 0.000 title description 3
- 238000007254 oxidation reaction Methods 0.000 title description 3
- 238000000859 sublimation Methods 0.000 title description 2
- 230000008022 sublimation Effects 0.000 title description 2
- 239000002245 particle Substances 0.000 claims abstract description 41
- 238000009434 installation Methods 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims description 26
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 18
- 239000011707 mineral Substances 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000005243 fluidization Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 229910052845 zircon Inorganic materials 0.000 claims description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims 4
- 239000000126 substance Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 239000013618 particulate matter Substances 0.000 abstract description 3
- 230000003134 recirculating effect Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 9
- 239000010802 sludge Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
- 238000000605 extraction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910000497 Amalgam Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 206010028916 Neologism Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012633 leachable Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000002906 medical waste Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/10—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/10—Drying by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/90—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/20—Medical materials
Definitions
- the present invention relates to the technical field of waste treatment and it aims, more particularly, although in a nonlimiting manner, the treatment of wet waste and, more specifically, among these, sludge of various origins.
- the first relates to the water content which must necessarily be removed for that a suitable treatment leads to the "inerting" of dry products residual.
- the second difficulty is due to the pasty or muddy form of the waste which poses a difficult problem of transfer within a facility, by risks of clogging, solidification, vaulting which may occur within transfer circuits in particular.
- the third difficulty relates to the establishment, conduct and control a treatment process capable of safely and completely eliminating all components of waste likely to be destroyed by incineration. This is a objective that must necessarily be achieved in order to meet the requirements of regulatory, or even legislative, texts aimed at eliminating, if not ultimately immediately, deposits and spills in uncontrolled or access dumps regulated.
- the prior art has proposed a number of methods to attempt to inert the waste. These processes can be classified into two main categories, called cold process and hot process.
- Vitrification occurs at very high temperature generated by expensive, complex and delicate technical means which do not cannot be considered for the treatment of all waste and which especially not suitable for wet waste.
- the particles circulate from the bottom of the bed to the upper level from which they are recycled for incorporation into the waste.
- the mixture obtained is received in a filtration tower intended to allow the evacuation of at least part moisture.
- a low racking device is provided to extract the mixture from the tower. filtration and to direct it to the inlet of a supply system providing, in the oven at the base of the fluidized bed, the mixture of heated particles.
- the waste-particle mixture will have the property of being put into circulation and of following, by a continuous feeding from the furnace, an upward migration in the fluidized bed within which an incineration burnable components may intervene.
- the second is that the mixture from the filtration tower has a heterogeneous character which is not favorable to the progress of a process complete incineration inside the bed.
- the third is due to the fact that the fluidization of the bed is ensured by gas exhaust of a burner responsible for raising and maintaining the temperature inert recyclable particles.
- gas exhaust of a burner responsible for raising and maintaining the temperature inert recyclable particles.
- a cot is provided fluidized constituted by a mass of solid particles which come from the waste itself (see page 2 lines 28 to 34) and which are partly recycled to a unit mixing with waste to be treated.
- Such a proposal involves particles of the same kind which, for those from the fluidized bed, can still offer an ability to amalgam with those to be treated. A risk of progressive agglomeration can therefore intervene to some of these particles whose presence will result in constituting little to small an inhomogeneous fluidized bed and, consequently, incapable of submitting the waste to the same heat treatment.
- the object of the present invention is to overcome the above drawbacks listed, in order to propose a process for inerting wet waste, and more particularly sludge, which is really effective, relatively little energy consumer and which could be subject to flexibility or suppleness of driving, in particular by self-adjusting the temperature regulation of the bed taking into account the energy input resulting from the actual and complete combustion burnable components.
- Figure 1 is a schematic view illustrating an installation for the implementation of the method.
- Figure 2 is a schematic view showing an alternative embodiment of the installation.
- FIG. 1 shows a first embodiment of an installation for implementing the treatment method.
- Such an installation comprises an oven 1 delimiting an enclosure 2 for confining a bed 3 of materials or of an inert mineral material, in particulate form.
- the enclosure 2 is made so that the bed 3 can rise over a relatively large height, for example between 1 m and 2.50 m.
- the inert mineral material retained is chosen from silica, alumina, lime, zircon, with a particle size favorable for fluidization.
- the particle size is, for example, between 100 and 2000 micrometers in average diameter.
- the bed 3 can be formed from a single mineral material or from a composition of several compatible with each other.
- the oven 1 comprises an insulating envelope 4 suitably formed to form a barrier limiting the propagation of calories from the interior of the oven to the surrounding environment.
- a tank 5 is mounted which delimits the enclosure 2 .
- the tank 5 has a bottom 6 and a double bottom 6a defining between them a manifold 7 of admission and pressure distribution whose function appears in the following.
- the double bottom 6a is provided with fluidization nozzles 8 opening inside the collector 7 which communicates with a circuit 9 adapted to supply an oxygenated gaseous fluid, under pressure, responsible for ensuring the fluidization of the bed 3 .
- the gaseous fluidization fluid is, for example, supplied by a booster 10 , the outlet 11 of which can be connected to the circuit 9 , either directly or indirectly through a heating system 12 , of any suitable type, which may preferably be a heat exchanger, the second circuit of which will be described below.
- the oven 1 also comprises heating means 13 which are constituted by static means capable of heating the bed 3 .
- Such means 13 are preferably constituted by electrical resistances, arranged between the tank 5 and the insulating envelope 4 , being distributed over the entire height corresponding to that of the bed 3 at least, but preferably also over the height a chamber 14 forming an enclosure sky and delimited inside the latter by the upper level of the bed 3 .
- the chamber 14 communicates at its upper part with a chimney 15 passing through the insulating envelope 4 to ensure the extraction of the fumes and other gaseous products developing in the enclosure 2 .
- the chimney 15 leads to a cyclone 16 for separating any dust, before being connected to the heating system 12 to take the second circuit of the latter then produced in the form of a dual-circuit exchanger.
- the exchanger 12 is also connected to a smoke treatment unit 17 , produced in any known manner to provide pollution control.
- the circuit 9 comprises a branch branch 9a capable of passing through a heater 18 , the outlet of which is connected to means 19 for supplying an oxidant inside the enclosure 2 .
- the means 19 are, for example, constituted by a rod 20 , the end of which is provided with a diffuser 21 which can be located just above the upper level of the bed 3 or at least partly inside the latter. .
- the upper level of the bed 3 inside the enclosure 2 is determined by extraction means 25 which can involve active means, of the type of an extraction screw endless driven by a motor or passive means, such as an overflow through a level weir.
- the enclosure 2 is provided with means 26 for supplying waste to be treated.
- waste it is appropriate, within the meaning of the invention, to consider the term in its widest sense to designate wet materials and more generally sludge.
- the supply means 26 may consist of a sheath containing an endless screw or also of a pneumatic transfer system. In all cases, the means 26 open out at the bottom of the tank 5 , substantially at the level of the double bottom 6a and above the outlets of the nozzles 8 .
- the supply means 26 are connected by a supply line 27 to a mixing unit 28 comprising a first inlet 29 reserved for the introduction of the waste to be treated and a second inlet 30 reserved for the introduction of a charge of mineral matter in particulate form directly from means 25 .
- the mixing unit 28 comprises a box 32 defining a trough or gutter 33 for, at least, a mixing screw 34 of the Archimedes type driven in rotation by an actuator 35 .
- the gauge 33 delimits a section or zone 36 , called a mixing zone, to which the inlets 29 and 30 lead .
- the inlet 29 is connected upstream to a device 37 for supplying waste which may be a buffer tank provided with extraction means, a grinder, a kneader, an agitator, or even a granulator, if the wet waste has been previously frozen.
- the gauge 33 delimits, after the zone 36 , a zone or section 38 , called coating-drying, which is overhung by a hood 39 connected to the smoke treatment circuit, for example between the heating system 12 and the processing unit 17 .
- the gauge 33 is connected, opposite section 36 , to line 27 with the interposition of a launching device 40 .
- the method according to the invention consists in heating the enclosure 2 by means of the means 13 so as to maintain a constant temperature, between 400 and 1000 ° C. and typically close to 900 ° C., imposed on the bed 3 .
- the unit 28 When the desired temperature is reached and maintained by control and servo means which are not directly part of the object of the invention, the unit 28 is put into service.
- inert mineral particles at a suitable temperature are supplied, for example by an auxiliary circuit 30a to maintain a functional mode in a closed circuit.
- the inert particles come directly from the oven 2 by extraction from the upper level of the bed 3 .
- Zone 36 receives, via inlet 29, a proportional quantity of waste which is thus mixed with the particles in zone 36 .
- the screw (s) 34 then maintain effective mixing of the mixture in the zone 38 where there is progressively a coating of the hot inert mineral particles which yield their calories to the layer of waste gradually forming into a dry gangue of relatively small thickness. Given the large specific surface area of the particles, a high drying power of the waste occurs and the vapors produced are taken up by the hood and evacuated.
- the waste is entirely incorporated by coating around the particles and the mixture thus obtained can be described as homogeneous.
- coated particles are then extracted from the box 28 and taken in charge by the launcher 40 to be conducted by the line 27 to the means 26 ensuring their introduction inside the bed 3 whose fluidized state is maintained by the intake oxygenated gaseous fluid, possibly heated, supplied by the booster 10 and delivered to the lower manifold of the tank 5 .
- the coated particles Upon their introduction to the base of the fluidized bed, the coated particles are subjected to a thermal shock bringing the gangue of waste to the temperature ambient of the fluidized bed.
- This temperature rise occurs quickly, given the relatively small thickness of the gangue of dried waste surrounding the particles.
- the thermal shock weakens the gangue to the point of fracturing it and the temperature of the bed maintains the combustion of the burnable compounds during the upward path followed by the particles and the waste inside the fluidized bed 3 .
- the ascending route is positively controlled in length of stay, given that the particles and waste are trapped in a kind of fluid matrix which homogeneity is ensured by the fact that the particles of mineral matter having been coated, are of the same nature and the same particle size as those constituting the fluidized bed.
- This residence time which is consequently relatively long due to the height of the fluidized bed 3 , can, depending on the operating parameters of the furnace, be in the region of several tens of minutes, or even several hours, during which the waste is subjected to the processing temperature.
- the leachable products partially decompose in the gaseous phase, for example, the salts in the form of chloride, and this gaseous phase is evacuated from the treatment and reaction enclosure 2 , via the chimney 15 to undergo there. possible separation of the fine particles included inside the cyclone 16 before passing through the exchanger 12 making it possible to improve the energy balance of the installation in operation. Beyond the exchanger 12 , the fumes are washed and decontaminated by the unit 17 operating in a manner known per se.
- the residual part of the waste in solid form can be partly burnt and partly oxidized by the effect of the oxygen surrounding each of the particles and which comes from the gaseous fluid for fluidizing the bed 3 . It can be envisaged to improve the presence of oxygen inside the enclosure 2 by providing in particular a supply by the rod 20 to maintain, for example, in the headliner or room 14 , a partial pressure of oxygen greater than 2,000 Pascal, maintaining an oxidizing atmosphere.
- the oxidation of the residual part in solid form also occurs due to the temperature maintained inside the enclosure 2 and the long residence time which is imposed on the particles following an ascending path or path inside the fluidized bed 3 .
- the supply, continuously or discontinuously, of the mixture to be treated has the consequence of increasing the mass of the fluidized bed 3 , the surplus of which is taken up at a higher level by the extraction means 25 .
- This surplus consists of the mineral matter in inert particulate form, or even the inert inert solid fraction of the waste.
- zone 36 can involve a proportion of particulate matter of between 15 and 80% compared to the waste.
- the recommended method involves the implementation work of inert particles which can be qualified as carriers which, in the above case, operate in a closed circuit to facilitate hydrodynamics, handling and waste circulation in the installation.
- the particles included also act as a vector of heat energy favoring, during mixing in the unit 28 , the drying of wet waste.
- This arrangement makes it possible to treat a wide spectrum of wet waste, even going as far as direct treatment of organic and hospital waste by planning, for example to freeze it initially to allow grinding and / or granulation favoring incorporation into the inert material. recycled whose temperature at the outlet of the oven ensures rapid drying during the mixing phase in unit 28 .
- FIG. 2 shows an alternative embodiment in which the recirculation means 30 are directed, optionally after passage through a cooler 43 , towards a separator 44 capable of ensuring, by any suitable means, such as centrifugation or mechanical stripping, the separation between the particulate inert material and the solid fraction of the waste together constituting the surplus extracted from bed 3 by means 25 .
- the separated solid fraction is evacuated to a packaging or compacting unit for ultimate waste, such as 45 , while the inert particulate matter fraction is taken up by a line 46 to reach inlet 29 .
- the invention finds a preferred application in the treatment of water sludge worn out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Drying Of Solid Materials (AREA)
Description
- créer dans l'enceinte de confinement d'un four un lit de particules inertes à la base duquel est injecté un fluide sous pression pour entretenir un lit fluidisé,
- maintenir le lit fluidisé à une température de traitement par un moyen de chauffage extérieur à l'enceinte,
- définir un niveau supérieur maximal du lit fluidisé et à extraire tout surplus à partir dudit niveau,
- mélanger les déchets avec une charge de matière minérale sous forme particulaire,
- introduire ledit mélange à la base du lit,
- soumettre le mélange à un parcours ascendant au sein du lit,
- prélever, à partir du ciel de four, les gaz produits qui sont dirigés vers une installation de traitement
- et extraire le surplus du lit fluidisé à partir du niveau supérieur,
- recycler les particules inertes chaudes extraites du lit vers une section de mélange d'une unité,
- admettre en proportion appropriée les déchets humides à traiter dans ladite section,
- procéder dans la section à un mélange,
- brasser et déplacer le mélange dans une section d'enrobage séchage où les déchets s'agglomèrent en couche autour des particules pour former une gangue en partie au moins séchée,
- recycler les particules enrobées directement à la base du lit
- et entretenir la fluidisation du lit par un fluide sous pression, oxygéné, délivré au moins à la base du lit.
Claims (12)
- Procédé de traitement de déchets par séchage, sublimation, oxydation et combustion, du type consistant à :caractérisé en ce qu'il consiste à :créer dans l'enceinte de confinement d'un four un lit de particules inertes à la base duquel est injecté un fluide sous pression pour entretenir un lit fluidisé,maintenir le lit fluidisé à une température de traitement par un moyen de chauffage extérieur à l'enceinte,définir un niveau supérieur maximal du lit fluidisé et à extraire tout surplus à partir dudit niveau,mélanger les déchets avec une charge de matière minérale sous forme particulaire,introduire ledit mélange à la base du lit,soumettre le mélange à un parcours ascendant au sein du lit,prélever, à partir du ciel de four, les gaz produits qui sont dirigés vers une installation de traitementet extraire le surplus du lit fluidisé à partir du niveau supérieur,recycler les particules inertes chaudes extraites du lit vers une section de mélange d'une unité (28),admettre en proportion appropriée les déchets humides à traiter dans ladite section,procéder dans la section à un mélange,brasser et déplacer le mélange dans une section d'enrobage séchage où les déchets s'agglomèrent en couche autour des particules pour former une gangue en partie au moins séchée,recycler les particules enrobées directement à la base du litet entretenir la fluidisation du lit par un fluide sous pression, oxygéné, délivré au moins à la base du lit.
- Procédé selon la revendication 1, caractérisé en ce que la matière minérale sous forme particulaire est choisie parmi la silice, l'alumine, le zircon, la chaux avec une granulométrie comprise entre 100 et 2000 micromètres de diamètre moyen.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que la matière minérale est mélangée aux déchets dans une proportion comprise entre 15 % et 80 %.
- Procédé selon la revendication 1, 2 ou 3, caractérisé en ce que la matière minérale et les déchets sont soumis à une température de traitement comprise entre 400 et 1000 °C.
- Procédé selon la revendication 1 et 2 à 4, caractérisé en ce que la matière minérale et les déchets sont soumis à un temps de séjour dans le lit fluidisé compris entre quelques dizaines de minutes et plusieurs heures.
- Procédé selon la revendication 1, caractérisé en ce qu'une pression partielle d'oxygène est maintenue dans le four.
- Procédé selon la revendication 6, caractérisé en ce que la pression partielle d'oxygène est supérieure à 2.000 Pascal.
- Procédé selon l'une des revendications 1 à 5, caractérisé en ce qu'on recycle le surplus en direction d'une installation de séparation entre la charge minérale et la fraction sèche, résiduelle et inerte des déchets.
- Installation pour la mise en oeuvre du procédé selon l'une des revendications 1 à 8, du type comprenantcaractérisée en ce qu'elle comprend,un four (1) délimitant une enceinte de confinement (2) pour un lit fluidisé (3) de matériaux,un circuit (9) de fourniture d'un fluide sous pression débouchant dans le fond de l'enceinte pour assurer la fluidisation du lit,des moyens (26) d'apport des produits à traiter à la base du litdes moyens (25) d'extraction du surplus du lit à partir du niveau supérieur de ce dernier,et une unité de mélange entre les déchets à traiter et le surplus de matériaux extraits du lit,une charge de matériaux particulaires inertes occupant l'enceinte de confinement du four pour constituer le lit fluidisé,une unité (28) de mélange comprenant une section de mélange à laquelle aboutissent une entrée de particules inertes chaudes et une entrée de déchets, d'une part, et une section d'enrobage-séchage, d'autre part,et des moyens (27) de recyclage raccordant la sortie de l'unité (28) à la base du four.
- Installation selon la revendication 9, caractérisée en ce que l'unité de mélange est réalisée sous la forme d'un caisson délimitant une auge contenant au moins un appareil mélangeur et définissant la section de mélange et la section d'enrobage-séchage.
- Installation selon la revendication 9 ou 10, caractérisée en ce que la section d'enrobage-séchage est surmontée d'une hotte de collecte et d'évacuation des vapeurs.
- Installation selon l'une des revendications 9 à 11, caractérisée en ce que les moyens de recyclage comprennent un séparateur (44) des matériaux minéraux inertes et de la fraction sèche, résiduelle et inerte des déchets traités.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9402486 | 1994-02-25 | ||
| FR9402486 | 1994-02-25 | ||
| PCT/FR1995/000223 WO1995023317A1 (fr) | 1994-02-25 | 1995-02-24 | Procede et installation de traitement de dechets par sechage, sublimation, oxydation et combustion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0746725A1 EP0746725A1 (fr) | 1996-12-11 |
| EP0746725B1 true EP0746725B1 (fr) | 1999-05-06 |
Family
ID=9460666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95910598A Expired - Lifetime EP0746725B1 (fr) | 1994-02-25 | 1995-02-24 | Procede et installation de traitement de dechets par sechage, sublimation, oxydation et combustion |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5806444A (fr) |
| EP (1) | EP0746725B1 (fr) |
| AT (1) | ATE179790T1 (fr) |
| CA (1) | CA2183786C (fr) |
| DE (1) | DE69509506T2 (fr) |
| DK (1) | DK0746725T3 (fr) |
| ES (1) | ES2133748T3 (fr) |
| WO (1) | WO1995023317A1 (fr) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020079075A1 (en) * | 1998-09-04 | 2002-06-27 | Imerys Minerals Limited | Treatment of solid containing material derived from effluent |
| CZ294933B6 (cs) | 1997-04-28 | 2005-04-13 | Melania Kaszas-Savos | Způsob zpětného získávání surovin z odpadů a zbylých látek a zařízení pro provádění tohoto způsobu |
| FI103582B (fi) * | 1997-12-19 | 1999-07-30 | Valtion Teknillinen | Menetelmä metallia sekä orgaanista ainesta sisältävän materiaalin käsi ttelemiseksi, johon sisältyy metallin erotus |
| US6135035A (en) * | 1999-03-02 | 2000-10-24 | Masek; Tommy D. | Animal waste disposal system |
| FR2811659B1 (fr) * | 2000-07-11 | 2003-05-23 | Snf Sa | Procede et installation de traitement de dechets liquides industriels, agricoles et urbains ou menagers, notamment du lisier de porc |
| US6601315B2 (en) | 2000-12-14 | 2003-08-05 | Bausch & Lomb Incorporated | Combined fluidized bed dryer and absorption bed |
| JP3854839B2 (ja) * | 2001-10-02 | 2006-12-06 | キヤノン株式会社 | 磁気抵抗素子を用いた不揮発固体メモリ |
| US6904767B1 (en) * | 2004-03-15 | 2005-06-14 | John J. Sheridan & Associates, Inc. | System for the dehumification of air |
| US7165414B2 (en) * | 2004-03-15 | 2007-01-23 | J. W. Wright, Inc. | System for the dehumification of air |
| RU2549947C1 (ru) * | 2014-02-27 | 2015-05-10 | Федеральное государственное бюджетное учреждение науки Институт катализа им. Г.К. Борескова Сибирского отделения Российской академии наук | Установка и способ утилизации биомассы |
| CN105889937B (zh) * | 2014-12-10 | 2019-01-29 | 张海明 | 燃烧式生活垃圾处理机 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3677404A (en) * | 1970-11-25 | 1972-07-18 | Procedyne Corp | Moving bed filtration method |
| US3818846A (en) * | 1972-04-26 | 1974-06-25 | Combustion Power | Method and apparatus for liquid disposal in a fluid bed reactor |
| FR2234920A1 (en) * | 1973-06-26 | 1975-01-24 | Meller Jacques | Fluidised bed incineration of sewage sludge - premixed with fraction of bed material before entering reactor |
| US4232614A (en) * | 1979-06-06 | 1980-11-11 | Dorr-Oliver Incorporated | Process of incineration with predrying of moist feed using hot inert particulates |
| JPS59183209A (ja) * | 1983-03-31 | 1984-10-18 | Kawasaki Heavy Ind Ltd | 廃プラスチツクを多量に含有するごみの流動床燃焼方法 |
| US4839022A (en) * | 1984-12-03 | 1989-06-13 | Atlantic Richfield Company | Method and apparatus for treating oil-water-solids sludges and refinery waste streams |
| US5147619A (en) * | 1986-02-19 | 1992-09-15 | Camlaw Limited | Nickel recovery using a fluidized bed process |
| US4755138A (en) * | 1986-09-16 | 1988-07-05 | The United States Of America As Represented By The United States Department Of Energy | Fluidized bed calciner apparatus |
| US4777889A (en) * | 1987-05-22 | 1988-10-18 | Smith Richard D | Fluidized bed mass burner for solid waste |
| US5049361A (en) * | 1988-11-18 | 1991-09-17 | Mobil Oil Corp. | Apparatus for fluid-bed catalytic reactions |
| DE3931900A1 (de) * | 1989-09-25 | 1991-04-04 | Forschungszentrum Juelich Gmbh | Verfahren zum verbrennen granularer kunstharzabfaelle, insbesondere von ionenaustauschern |
| DE4102168C2 (de) * | 1991-01-25 | 1994-10-20 | Klein Alb Gmbh Co Kg | Verfahren und Vorrichtung zum Verbrennen von Staub |
| DE4321680C1 (de) * | 1993-06-30 | 1994-04-14 | Metallgesellschaft Ag | Verfahren zum Trocknen eines wasserhaltigen Brennstoffs durch direkten Kontakt mit heißem, körnigem Feststoffrückstand |
-
1995
- 1995-02-24 WO PCT/FR1995/000223 patent/WO1995023317A1/fr not_active Ceased
- 1995-02-24 CA CA002183786A patent/CA2183786C/fr not_active Expired - Fee Related
- 1995-02-24 DK DK95910598T patent/DK0746725T3/da active
- 1995-02-24 EP EP95910598A patent/EP0746725B1/fr not_active Expired - Lifetime
- 1995-02-24 DE DE69509506T patent/DE69509506T2/de not_active Expired - Fee Related
- 1995-02-24 AT AT95910598T patent/ATE179790T1/de not_active IP Right Cessation
- 1995-02-24 US US08/696,911 patent/US5806444A/en not_active Expired - Fee Related
- 1995-02-24 ES ES95910598T patent/ES2133748T3/es not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DK0746725T3 (da) | 1999-11-15 |
| DE69509506T2 (de) | 1999-09-02 |
| US5806444A (en) | 1998-09-15 |
| CA2183786C (fr) | 2000-04-18 |
| DE69509506D1 (de) | 1999-06-10 |
| ATE179790T1 (de) | 1999-05-15 |
| WO1995023317A1 (fr) | 1995-08-31 |
| ES2133748T3 (es) | 1999-09-16 |
| EP0746725A1 (fr) | 1996-12-11 |
| CA2183786A1 (fr) | 1995-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1890080B1 (fr) | Procédé de préparation d'une charge contenant de la biomasse en vue d'une gazeification ultèrieure | |
| WO2005018841A2 (fr) | Thermolyse de dechets organiques en four a billes | |
| CA2183786C (fr) | Procede et installation de traitement de dechets par sechage, sublimation, oxydation et combustion | |
| CA2352107C (fr) | Procede et dispositif d'incineration et de vitrification de dechets, notamment radioactifs | |
| FR2563118A1 (fr) | Procede et installation de traitement de matiere en lit fluidise circulant | |
| FR2722436A1 (fr) | Procede et installation de thermolyse de dechets | |
| MXPA04010911A (es) | Tratamiento de desechos solidos municipales. | |
| FR2473914A1 (fr) | Procede et appareil pour rendre relativement inoffensifs des dechets combustibles pouvant etre dangereux | |
| CA2195742C (fr) | Procede de recyclage des bois traites et l'installation de mise en oeuvre du procede | |
| US4050900A (en) | Incineration apparatus | |
| FR2556983A1 (fr) | Procede et installation de traitement de matieres en lit fluidise, en particulier pour la combustion ou gazeification de matiere combustible | |
| CH619486A5 (fr) | ||
| EA000220B1 (ru) | Способ переработки органических отходов и устройство для его осуществления | |
| EP0485255B2 (fr) | Procédé et dispositif de production d'un combustible solide à partir de déchets combustibles | |
| FR2513622A1 (fr) | Procede et appareil pour la calcination des matieres minerales en poudre, notamment en cimenterie | |
| EP0426925B1 (fr) | Procédé et installation de traitement de déchets urbains et/ou industriels | |
| FR2496085A1 (fr) | Procede et dispositif pour le sechage et la combustion des boues | |
| EP0426926A1 (fr) | Procédé, four et installation pour la destruction de déchets industriels | |
| US12247170B2 (en) | Systems and methods for the thermochemical production and refining of hydrocarbon compounds | |
| CA1185075A (fr) | Procede d'epuration des gaz et installation pour sa mise en oeuvre | |
| WO2017137698A1 (fr) | Procede et installation de traitement d'un lixiviat ou d'un concentrat de lixiviat charge en constituants mineraux et organiques | |
| WO2010136662A1 (fr) | Procede de traitement thermique de biomasse avec un solide caloporteur | |
| EP1498191A1 (fr) | Procédé et installation pour la dépollution en continu de terres ou de boues | |
| FR2710967A1 (fr) | Procédé et unité de traitement par calcination de déchets dangereux. | |
| BE506669A (fr) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19960913 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE DK ES FR GB IE IT LI SE |
|
| 17Q | First examination report despatched |
Effective date: 19980624 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT CH DE DK ES FR GB IE IT LI SE |
|
| REF | Corresponds to: |
Ref document number: 179790 Country of ref document: AT Date of ref document: 19990515 Kind code of ref document: T |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REF | Corresponds to: |
Ref document number: 69509506 Country of ref document: DE Date of ref document: 19990610 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: FRENCH |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: BOVARD AG PATENTANWAELTE |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19990721 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2133748 Country of ref document: ES Kind code of ref document: T3 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: TQ |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20040224 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20050218 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IE Payment date: 20050221 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20050223 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20050228 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20050308 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20050315 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20050317 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20050322 Year of fee payment: 11 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051031 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20051031 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060224 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060224 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060224 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060225 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060225 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060228 Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060228 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060228 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20060228 Year of fee payment: 12 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060901 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| EUG | Se: european patent has lapsed | ||
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20060224 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20060225 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070224 |