WO1993014795A1 - Waste sanitizing method and plant for implementing same - Google Patents

Waste sanitizing method and plant for implementing same Download PDF

Info

Publication number
WO1993014795A1
WO1993014795A1 PCT/FR1993/000096 FR9300096W WO9314795A1 WO 1993014795 A1 WO1993014795 A1 WO 1993014795A1 FR 9300096 W FR9300096 W FR 9300096W WO 9314795 A1 WO9314795 A1 WO 9314795A1
Authority
WO
WIPO (PCT)
Prior art keywords
waste
finely divided
shredding
tank
divided particles
Prior art date
Application number
PCT/FR1993/000096
Other languages
French (fr)
Inventor
Erwin Vogrin
Original Assignee
Innovation Process Vogrin S.A.
Ferdinand, Jean-François
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Innovation Process Vogrin S.A., Ferdinand, Jean-François filed Critical Innovation Process Vogrin S.A.
Priority to JP5512993A priority Critical patent/JPH06506382A/en
Priority to CA002107226A priority patent/CA2107226A1/en
Publication of WO1993014795A1 publication Critical patent/WO1993014795A1/en

Links

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
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
    • B02C19/0075—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for specially adapted for disintegrating medical waste
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L11/00—Methods specially adapted for refuse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/0075—Disposal of medical waste

Definitions

  • the present invention relates to a process for hygienizing waste which may contain biological contaminants, in particular hospital waste.
  • It also relates to a plant for hygienizing waste which may contain biological contaminants, in particular hospital waste, for the implementation of this process.
  • Publication DE-C-3 938 546 describes a device for disinfecting products by a steam treatment during a compression phase of these previously ground products. This compression takes place in a hermetically closed chamber by means of an endless screw which carries the products through this chamber. Injectors are used to inject superheated steam inside the chamber in order to sterilize them. However, the disinfection is completely incomplete because the compressed state of the products makes it impossible for sufficient vapor penetration into the very heart of the mass of particles to be treated, so that sterilization can only be partial.
  • the present invention proposes to overcome all of the above drawbacks by providing an installation based on an efficient, economical and profitable method for rendering all the biological contaminants contained in waste, and in particular hospital waste.
  • this object is achieved by the process according to the invention, characterized in that this waste is mechanically transformed to produce finely divided particles during at least one grinding and shredding step, in that these finely divided particles by means of water vapor to render the biological contaminants contained in this waste inert,. and in that the o removes these particles after decontamination in storage and / or transport containers.
  • said waste is mechanically transformed by subjecting it to at least two shredding and shredding steps, the first step consisting in dividing them to make elements whose average dimensions are less than a first given value, and the last step consisting in dividing these elements to make them said finely divided particles whose mean dimensions have a second value less than said first value.
  • the steam treatment is carried out in a tank in which the finely divided particles are stirred and in which superheated steam is blown.
  • the finely divided particles are stirred by rotating the tank around a central axis, this tank comprising fixed radial fins arranged on its inner wall to ensure the mixing of said particles during its rotation.
  • superheated steam of ea is blown into the tank by means of at least one injector located in a central zone close to the axis of the tank.
  • the finely divided particles are steam treated by keeping these particles in the tank in rotation and by continuously blowing in superheated steam for a determined time which is a function of the temperature of the steam.
  • the finely divided particles are removed after their treatment with superheated steam, using a worm screw.
  • a boiler is supplied to a steam generator by means of air drawn inside a device in which the said mechanical transformation is carried out to carry out the said finely divided particles.
  • the water vapor used during the step of treating the finely divided particles is recycled by creating a closed circuit of water vapor between the steam generator and the treatment tank.
  • the hygienization installation characterized in that it comprises a grinding and shredding device for mechanically transforming said waste into finely divided particles, a device for treating these finely divided particles at water vapor means for neutralizing said biological contaminants contained in this waste, and means for removing the particles after decontamination in storage and / or transport containers.
  • the shredding and shredding device comprises at least a first coarse shredding and shredding member, arranged to divide said waste into elements whose average dimensions are less than a first given value, and at least one second grinding and shredding arranged to divide these elements into finer particles whose average dimensions have a value less than said first given value.
  • said first organ comprises at least one pair of cylindrical rollers provided with protuberances, these rollers being driven in reverse rotation
  • the second organ also comprises at least one pair of cylindrical rollers provided with protuberances
  • the protuberances of rollers of the second member are more numerous and closer to each other than those of the rollers of the first member.
  • the shredding and shredding members are arranged on the same vertical in such a way that the waste is crushed and shredded more and more finely by passing from one member to the next by gravity.
  • the steam treatment device is advantageously arranged under the grinding and shredding device, in such a way that the finely divided particles pass from the first device to the secon by gravity.
  • a particularly advantageous embodiment consists in producing a steam treatment device comprising a cuv equipped with means for brewing said finely divided particles e means for blowing in superheated steam.
  • the means for stirring the finely divided particles advantageously comprise radial fins arranged along the inside of the tank and said tank is rotatable around a central axis.
  • the means for injecting the superheated water vapor comprise at least one injector disposed near the central axis of the rotary tank.
  • the installation advantageously includes means for sucking the air into the grinding and shredding device and for injecting it into a boiler of a steam generator. water.
  • FIG. 1 represents a schematic view in front elevation of a preferred embodiment of the installation according to the invention
  • FIG. 2 represents a partial side view of the installation of FIG. 1, and
  • FIG. 3 shows a detail view illustrating the steam treatment tank in the closed position.
  • the installation 10 represented essentially consists of a grinding and shredding device 11 for mechanically transforming the waste to be treated into finely divided particles, of a device 12 for treating these finely divided particles by means of steam of water, this installation being supplemented by means 13 making it possible to bring the waste to be treated and means 14 intended for evacuating the treated waste to a recovery zone possibly equipped with storage and / or transport containers.
  • the shredding and shredding device comprises a carcass 16 having the shape of a vertical column surmounted by an inlet hopper 17 into which are poured bags 18 containing the waste to be treated, brought in by a grab 19 moving on an elevator 20. It is understood that any other suitable feeding device could be associated with this installation. In particular, one could envisage a direct dumping of waste from an access ramp opening at the height of the inlet hopper 17, a conveyor belt or any other suitable device.
  • the shredding and shredding device shown comprises three shredding and shredding members 21a, 21b and 21c respectively, each consisting of a pair of cylindrical rollers equipped with protuberances and driven in opposite directions.
  • the grinding and shredding member 21a comprises two rollers 22a and 23a driven in synchronism by a drive motor 2 a. These two rollers are provided with a set of teeth or protuberances 25a situated on their periphery and arranged in such a way that the waste is crushed, shredded and divided into elements whose average dimensions are between a few millimeters and a few centimeters.
  • the second stage of grinding and shredding is carried out by the member 21b which also consists of two substantially cylindrical rollers 22b and 23b respectively, also driven in a synchronized manner in reverse rotation by a motor 24b.
  • These rollers carry protrusions 25b which are finer and which have the purpose of continuing and improving the grinding-shredding operation already carried out by the rollers of the previous member.
  • the divided elements obtained at the outlet of these grinding and shredding members have dimensions which are substantially smaller than those of the elements coming from member 21a.
  • the third stage of grinding and shredding takes place in the member 21c which comprises, as before, two cylindrical rollers 22c and 23c driven in reverse rotation by a drive motor 24c.
  • These rollers include a set of protrusions 25c arranged on their periphery. These protrusions are higher in number and arranged more closely than those of the rollers of the members described above, in order to complete the action of grinding and shredding and to obtain finely divided particles whose dimensions are on average smaller or equal to the centimeter.
  • the finely divided particles 26 are collected by a hopper 27 which directs them through an airlock 28 to the inlet 29 of the device 12 for steam treatment.
  • This device 12 essentially consists of an outer drum 30 inside of which is mounted a rotary tank 31, the inner wall of which is lined with a certain number of radial fins 32, the role of which will be defined below.
  • This rotary tank has an open 33 which can be closed by a sealing sector 34 mounted on two lateral arms 35 pivoting around the axis of rotation 36 of the tank.
  • the tank is in the form of a cylindrical drum whose side wall is perforated and has a set of calibrated openings 37 allowing the flow of liquid substances and water obtained by condensation of water vapor used for treatment.
  • a drive motor 38 is coupled to the axis of the rotary tank 31 to ensure its drive during the treatment and the continuous mixing of the finely divided particles contained in this tank, by means of the radial fins 32.
  • a sleeve 39 coaxial with the axis 36 of this tank, this sleeve being perforated at its periphery and comprising a series of openings constituting injectors 40 designed to inject superheated water vapor inside the tank 31.
  • This water vapor is supplied by a conduit 4.1 connected to a water vapor generator 2 associated with a boiler 43.
  • a conduit 44 also connected to the water vapor generator 42, ensures the return of water vapor and defines with the LX conduit a closed circuit in which the process water vapor circulates between the steam generator 42 and the treatment tank 31
  • a duct 45 connects the drum 30, in which the treatment tank 31 is housed, to the boiler 43 to collect the liquid substances escaping through the openings 37 of the tank 31 direct them towards the boiler 43.
  • a conduit 46 sucks the contents inside the grinding and shredding device 1 to also inject it into the boiler A3 for the destruction of the any contaminating substances that it could transport.
  • the installation works in the following way: the waste is brought into the inlet hopper 17 and is crushed shredded in the grinding and shredding device 11 to be transformed into finely divided particles 26. After this first purely mechanical operation, these particles are introduced into the tank 31 after opening the shutter sector 34. After closing the tank 31, the latter is rotated and the superheated water vape is blown into the central zone close to the axis of the tank by means of the injectors 40. During this rotation, the particles are continuously stirred by the radial fins 32 and are therefore continuously subjected to the different jets of steam generated by the injectors. The combined effect of stirring and continuous injection of superheated water vapor s these finely divided particles causes the total destruction of biological contaminants possibly carried by these particles.
  • the treatment lasts for a predetermined time which is a function of steam temperature and possibly the degree of contamination of the waste to be treated.
  • the tank is placed in a position such that its opening 33 is located in its lower part.
  • the opening is made by pivoting of the arms 35 lateral sliding of the obturation sector 34.
  • the finely divided particles treated with steam are evacuated by the evacuation means 14 which preferably comprise an endless screw 47 driven by an electric motor 48, and whose function is to transfer the treated waste into a container or into an appropriate compacting device.
  • This treated waste is classified in category d household waste and can be handled without any danger, or even used in waste recovery chains known per se.
  • the evacuation device may be different from that shown in the figures.

Abstract

A waste sanitizing device and a plant for implementing same. The plant comprises a device (11) for crushing and shredding waste carried by a feeding device (13), and a steam treatment device (12), as well as a discharging assembly (14). The crushing and shredding device (11) comprises at least two crushing and shredding members (21a and 21c) each having two rollers (22a and 23a, 22c and 23c) rotating in opposite directions and having projections. The steam treatment device comprises a rotary vessel (31) combined with a steam generator (42) supplying steam to injectors (40) arranged around the shaft (36) of the vessel. The device is particularly useful for processing waste which comprises biological contaminants, e.g. hospital refuse.

Description

PROCEDE D'HYGIENISATION DE DECHETS ET INSTALLATION POUR LA MISE EN OEUVRE DE CE PROCEDE.PROCESS FOR HYGIENIZING WASTE AND INSTALLATION FOR CARRYING OUT THIS PROCESS.
La présente invention concerne un procédé d' hygiénisation de déchets pouvant contenir des contaminants biologiques , notamment de déchets hospitaliers .The present invention relates to a process for hygienizing waste which may contain biological contaminants, in particular hospital waste.
Elle concerne également une installation d'hygiénisation de déchets pouvant contenir des contaminants biologiques , notamment de déchets hospitaliers , pour la mise en oeuvre de ce procédé.It also relates to a plant for hygienizing waste which may contain biological contaminants, in particular hospital waste, for the implementation of this process.
En ce qui concerne le traitement , voire l' élimination des déchets contaminés , notamment par des contaminants biologiques comme c' est le cas pour les déchets d'origine hospitalière, deux thèses s'affrontent actuellement :With regard to the treatment, even the elimination of contaminated waste, in particular by biological contaminants as it is the case for waste of hospital origin, two theses currently clash:
- l' une propose la destruction par incinération des déchets dans l' enceinte de l' hôpital et l' évacuation des cendres dans des décharges classiques ,- one proposes the destruction by incineration of waste in the enclosure of the hospital and the evacuation of ashes in traditional landfills,
- l'autre propose une hygiénisation des déchets pour les rendre inertes et permettre de ce fait soit leur recyclage , soit leur dépôt dans des décharges classiques . En effet lorsque ces déchets contaminés sont rendus inertes ils sont classés dans la catégorie des ordures ménagères et peuvent, le cas échéant, être traités dans le cadre d' une chaîne de valorisation des déchets .- the other proposes hygienization of the waste to make it inert and thereby allow either its recycling or its deposit in conventional landfills. When these contaminated wastes are rendered inert, they are classified in the household waste category and can, if necessary, be treated as part of a waste recovery chain.
La première solution qui consiste à éliminer les déchets par incinération dans l' enceinte même de l' hôpital, se heurte à des difficultés de plus en plus marquées pour l'obtention des autorisations d'incinération "intra-muros" . La seule voie possible reste donc l' hygiénisation des déchets qui permet de les rendre inertes sur place pour les amener dans un état dans lequel ils peuvent être manipulés sans danger . Des solutions ont été proposées pour neutraliser les contaminants de ces déchets par un traitement thermique à la vapeur . Malheureusement les solutions envisagées sont inefficaces et peu rentables . Pour que la vapeur puisse agir d' une manière efficace il est nécessaire qu'elle puisse bien pénétrer dans la masse de produits à traiter et rester en contact avec ces produits pendant un temps suffisamment long pour que tous les contaminants biologiques soient détruits . On sait par expérience qu'il faut environ vingt minutes de traitement à une température de l'ordre de 125° C, dix minutes de traitement pour une température voisine de 13 -°C et seulement trois minutes de traitement pour une température voisine de 150° C. Lorsque ce traitement s' effectue à l'intérieur d'une enceinte dans laquelle les déchets sont comprimés , comme c' est par exemple le cas lorsqu'ils sont entraînés par un mécanisme de type vis sans fin, le degré de pénétration de la vapeur est relativement faible de sorte que rien ne permet de garantir que tous les contaminants biologiques ont été détruits lorsque les produits sortent de l'enceinte de traitement. Avec ce. type d' équipement, le seul moyen d'améliorer l'efficacité du système est de diminuer la masse de déchets traités par unité de temps , ce qui aboutît à un renchérissement des coûts et à une diminution sensible de la rentabilité dudit équipement.The first solution which consists in eliminating waste by incineration in the very enclosure of the hospital, encounters more and more marked difficulties for obtaining authorizations for incineration "intramural". The only possible way therefore remains the hygienization of the waste which makes it possible to inert it on the spot to bring it into a state in which it can be handled without danger. Solutions have been proposed to neutralize the contaminants of this waste by a heat treatment with steam. Unfortunately, the solutions considered are ineffective and not very profitable. In order for the vapor to act effectively it is necessary that it can penetrate well into the mass of products to be treated and remain in contact with these products for a time long enough for all the biological contaminants to be destroyed. We know from experience that it takes about twenty minutes of treatment at a temperature of about 125 ° C, ten minutes of treatment for a temperature close to 13 - ° C and only three minutes of treatment for a temperature close to 150 ° C. When this treatment is carried out inside an enclosure in which the waste is compressed, as it is for example the case when they are entrained by a worm-type mechanism, the degree of penetration steam is relatively small so there is no guarantee that all biological contaminants have been destroyed when the products leave the processing enclosure. With this. type of equipment, the only way to improve the efficiency of the system is to reduce the mass of waste treated per unit of time, which leads to higher costs and a significant decrease in the profitability of said equipment.
La publication DE-C-3 938 546 décrit un dispositif de désinfection de produits par un traitement à la vapeur au cours d'une phase de compression de ces produits préalablement broyés . Cette compression s'effectue dans une chambre hermétiquement fermée au moyen d' une vis sans fin qui effectue le transport des produits à travers cette chambre. Des injecteurs permettent d'injecter de la vapeur d'eau surchauffée à l'intérieur de la chambre en vue de les stériliser. Toutefois la désinfection est totalement incomplète parce que l'état comprimé des produits rend impossible une pénétration suffisante de la vapeur au coeur même de la masse de particules à traiter, de sorte que la stérilisation ne peut être que partielle.Publication DE-C-3 938 546 describes a device for disinfecting products by a steam treatment during a compression phase of these previously ground products. This compression takes place in a hermetically closed chamber by means of an endless screw which carries the products through this chamber. Injectors are used to inject superheated steam inside the chamber in order to sterilize them. However, the disinfection is completely incomplete because the compressed state of the products makes it impossible for sufficient vapor penetration into the very heart of the mass of particles to be treated, so that sterilization can only be partial.
La présente invention se propose de pallier l'ensemble des inconvénients ci-dessus en réalisant une installation basée sur un procédé efficace, économique et rentable pour rendre inertes tous les contaminants biologiques contenus dans des déchets , et notamment de déchets d'origine hospitalière.The present invention proposes to overcome all of the above drawbacks by providing an installation based on an efficient, economical and profitable method for rendering all the biological contaminants contained in waste, and in particular hospital waste.
Ce but est atteint par le procédé selon l'invention caractérisé en c que l' on transforme mécaniquement ces déchets pour réaliser de particules finement divisées au cours d' au moins une étape de broyag et de dechiquetage, en ce que l'on traite ces particules finemen divisées au moyen de vapeur d' eau pour rendre inertes le contaminants biologiques contenus dans ces déchets , . et en ce que l'o évacue ces particules après décontamination dans des conteneurs d stockage et/ou de transport.This object is achieved by the process according to the invention, characterized in that this waste is mechanically transformed to produce finely divided particles during at least one grinding and shredding step, in that these finely divided particles by means of water vapor to render the biological contaminants contained in this waste inert,. and in that the o removes these particles after decontamination in storage and / or transport containers.
Selon un mode de réalisation préféré , on transforme mécaniquement lesdits déchets en les soumettant à au moins deux étapes de broyag et de dechiquetage, la première étape consistant à les diviser pour e faire des éléments dont les dimensions moyennes sont inférieures à un première valeur donnée , et la dernière étape consistant à diviser ce éléments pour en faire lesdites particules finement divisées dont le dimensions moyennes ont une deuxième valeur inférieure à ladit première valeur .According to a preferred embodiment, said waste is mechanically transformed by subjecting it to at least two shredding and shredding steps, the first step consisting in dividing them to make elements whose average dimensions are less than a first given value, and the last step consisting in dividing these elements to make them said finely divided particles whose mean dimensions have a second value less than said first value.
Dans le cadre de ce mode de réalisation préféré, le traitement à l vapeur s' effectue dans une cuve dans laquelle les particules finemen divisées sont brassées et dans laquelle on insuffle de la vapeur d' ea surchauffée.In the context of this preferred embodiment, the steam treatment is carried out in a tank in which the finely divided particles are stirred and in which superheated steam is blown.
D' une manière préférentielle, on brasse les particules finement divisée en faisant tourner la cuve autour d' un axe central, cette cuv comportant des ailettes radiales fixes disposées sur sa paroi intérieur pour assurer le brassage desdits particules au cours de sa rotation.Preferably, the finely divided particles are stirred by rotating the tank around a central axis, this tank comprising fixed radial fins arranged on its inner wall to ensure the mixing of said particles during its rotation.
Selon un mode de réalisation avantageux on insuffle de la vapeur d' ea surchauffée dans la cuve au moyen d' au moins un injecteur localis dans une zone centrale voisine de l' axe de la cuve. Afin de garantir une efficacité absolue de ce procédé, on effectue le traitement à la vapeur des particules finement divisées en maintenant ces particules dans la cuve en rotation et en insufflant continûment de la vapeur surchauffée pendant un temps déterminé qui est fonction de la température de la vapeur .According to an advantageous embodiment, superheated steam of ea is blown into the tank by means of at least one injector located in a central zone close to the axis of the tank. In order to guarantee absolute efficiency of this process, the finely divided particles are steam treated by keeping these particles in the tank in rotation and by continuously blowing in superheated steam for a determined time which is a function of the temperature of the steam.
D' une façon particulièrement avantageuse on évacue les particules finement divisées après leur traitement à la vapeur d' eau surchauffée, au moyen d' une vis sans fin .Particularly advantageously, the finely divided particles are removed after their treatment with superheated steam, using a worm screw.
Pour éliminer tout risque de prolifération ou de dispersion des contaminants biologiques , on alimente une chaudière d' un générateur de vapeur d' eau au moyen d'air aspiré à l'intérieur d'un dispositif dans lequel on effectue ladite transformation mécanique pour réaliser lesdites particules finement divisées .To eliminate any risk of proliferation or dispersion of biological contaminants, a boiler is supplied to a steam generator by means of air drawn inside a device in which the said mechanical transformation is carried out to carry out the said finely divided particles.
Pour atteindre ce même objectif , on recycle la vapeur d'eau utilisée au cours de l' étape de traitement des particules finement divisées en créant un circuit fermé de vapeur d' eau entre le générateur de vapeur d' eau et la cuve de traitement.To achieve this same objective, the water vapor used during the step of treating the finely divided particles is recycled by creating a closed circuit of water vapor between the steam generator and the treatment tank.
Ce but est également atteint par l'installation d' hygiénisation selon l'invention, caractérisée en ce qu' elle comporte un dispositif de broyage et de dechiquetage pour transformer mécaniquement lesdits déchets en particules finement divisées , un dispositif pour traiter ces particules finement divisées au moyen de vapeur d' eau pour neutraliser dits contaminants biologiques contenus dans ces déchets , et des moyens pour évacuer les particules après décontamination dans des conteneurs de stockage et/ou de transport.This object is also achieved by the hygienization installation according to the invention, characterized in that it comprises a grinding and shredding device for mechanically transforming said waste into finely divided particles, a device for treating these finely divided particles at water vapor means for neutralizing said biological contaminants contained in this waste, and means for removing the particles after decontamination in storage and / or transport containers.
Selon un mode de réalisation préféré, le dispositif de broyage et de dechiquetage comporte au moins un premier organe de broyage et de dechiquetage grossier , agencé pour diviser lesdits déchets en éléments dont les dimensions moyennes sont inférieures à une première valeur donnée , et au moins un deuxième organe de broyage et de dechiquetage agencé pour diviser ces éléments en particules plus fine dont les dimensions moyennes ont une valeur inférieure à ladit première valeur donnée.According to a preferred embodiment, the shredding and shredding device comprises at least a first coarse shredding and shredding member, arranged to divide said waste into elements whose average dimensions are less than a first given value, and at least one second grinding and shredding arranged to divide these elements into finer particles whose average dimensions have a value less than said first given value.
Toujours selon ce mode de réalisation préféré, ledit premier organ comporte au moins une paire de rouleaux cylindriques pourvus d protubérances , ces rouleaux étant entraînés en rotation inverse , ledi deuxième organe comporte également au moins une paire de rouleau cylindriques pourvus de protubérances , et les protubérances de rouleaux du deuxième organe sont plus nombreuses et plu rapprochées les unes des autres que celles des rouleaux du premie organe.Still according to this preferred embodiment, said first organ comprises at least one pair of cylindrical rollers provided with protuberances, these rollers being driven in reverse rotation, the second organ also comprises at least one pair of cylindrical rollers provided with protuberances, and the protuberances of rollers of the second member are more numerous and closer to each other than those of the rollers of the first member.
D' une manière particulièrement avantageuse, les organes de broyage e de dechiquetage sont disposés -sur une même verticale de telle manièr que les déchets soient broyés et déchiquetés de plus en plus finemen en passant d' un organe au suivant par gravité.In a particularly advantageous manner, the shredding and shredding members are arranged on the same vertical in such a way that the waste is crushed and shredded more and more finely by passing from one member to the next by gravity.
Le dispositif de traitement à la vapeur est avantageusement dispos sous le dispositif de broyage et de dechiquetage, de telle manière qu les particules finement divisées passent du premier dispositif au secon par gravité.The steam treatment device is advantageously arranged under the grinding and shredding device, in such a way that the finely divided particles pass from the first device to the secon by gravity.
Une forme de réalisation particulièrement avantageuse consiste réaliser un dispositif de traitement à la vapeur comportant une cuv équipée de moyens pour brasser lesdites particules finement divisées e des moyens pour insuffler de la vapeur surchauffée.A particularly advantageous embodiment consists in producing a steam treatment device comprising a cuv equipped with means for brewing said finely divided particles e means for blowing in superheated steam.
Les moyens pour brasser les particules finement divisées comporten avantageusement des ailettes radiales disposées le long de la par intérieure de la cuve et ladite cuve est rotative autour d'un ax central. Pour que le traitement soit aussi efficace que possible, les moyens pour insuffler la vapeur d' eau surchauffée comportent au moins un injecteur disposé à proximité de l' axe central de la cuve rotative.The means for stirring the finely divided particles advantageously comprise radial fins arranged along the inside of the tank and said tank is rotatable around a central axis. In order for the treatment to be as effective as possible, the means for injecting the superheated water vapor comprise at least one injector disposed near the central axis of the rotary tank.
Pour éviter la dissémination des contaminants biologiques inclus dans les déchets à traiter , l'installation comporte avantageusement des moyens pour aspirer l' air dans le dispositif de broyage et de dechiquetage et pour l' injecter dans une chaudière d' un générateur de vapeur d' eau.To avoid the dissemination of biological contaminants included in the waste to be treated, the installation advantageously includes means for sucking the air into the grinding and shredding device and for injecting it into a boiler of a steam generator. water.
La présente invention sera mieux comprise en référence à la description d' un exemple de réalisation préférée et du dessin annexé dans lequel :The present invention will be better understood with reference to the description of a preferred embodiment and of the accompanying drawing in which:
- la figure 1 représente une vue schématique en élévation frontale d' une forme de réalisation préférée de l'installation selon l'invention,FIG. 1 represents a schematic view in front elevation of a preferred embodiment of the installation according to the invention,
- la figure 2 représente une vue partielle de côté de l'installation de la figure 1 , etFIG. 2 represents a partial side view of the installation of FIG. 1, and
- la figure 3 représente une vue de détail illustrant la cuve de traitement à la vapeur en position fermée.- Figure 3 shows a detail view illustrating the steam treatment tank in the closed position.
En référence aux figures , l'installation 10 représentée se compose essentiellement d' un dispositif de broyage et de dechiquetage 11 pour transformer mécaniquement les déchets à traiter en particules finement divisées , d' un dispositif 12 pour traiter ces particules finement divisées au moyen de vapeur d' eau , cette installation étant complétée par des moyens 13 permettant d'amener les déchets à traiter et des moyens 14 destinés à évacuer les déchets traités vers une zone de récupération éventuellement équipée de conteneurs de stockage et/ou de transport .With reference to the figures, the installation 10 represented essentially consists of a grinding and shredding device 11 for mechanically transforming the waste to be treated into finely divided particles, of a device 12 for treating these finely divided particles by means of steam of water, this installation being supplemented by means 13 making it possible to bring the waste to be treated and means 14 intended for evacuating the treated waste to a recovery zone possibly equipped with storage and / or transport containers.
Le dispositif de broyage et de dechiquetage comporte une carcasse 16 ayant la forme d' une colonne verticale surmontée d' une trémie d' entrée 17 dans laquelle sont déversés des sacs 18 contenant les déchets à traiter , amenés par une benne 19 se déplaçant sur un élévateur 20. 11 est bien entendu que tout autre dispositif d' amenée approprié pourrait être associé à cette installation . En particulier , on pourrait envisager un déversement direct des déchets à partir d' une rampe d'accès débouchant à la hauteur de la trémie d' arrivée 17 , une bande transporteuse ou tout autre dispositif approprié .The shredding and shredding device comprises a carcass 16 having the shape of a vertical column surmounted by an inlet hopper 17 into which are poured bags 18 containing the waste to be treated, brought in by a grab 19 moving on an elevator 20. It is understood that any other suitable feeding device could be associated with this installation. In particular, one could envisage a direct dumping of waste from an access ramp opening at the height of the inlet hopper 17, a conveyor belt or any other suitable device.
Le dispositif de broyage et de dechiquetage représenté comporte trois organes de broyage et de dechiquetage respectivement 21a, 21b et 21c se composant chacun d' une paire de rouleaux cylindriques équipés de protubérances et entraînés en sens inverse . L' organe de broyage et de dechiquetage 21a comporte deux rouleaux 22a et 23a entraînés en synchronisme par un moteur d' entraînement 2 a. Ces deux rouleaux sont pourvus d' un ensemble de dents ou de protubérances 25a situées sur leur périphérie et disposées de telle manière que les déchets sont broyés , déchiquetés et divisés en éléments dont les dimensions moyennes sont comprises entre quelques millimètres et quelques centimètres .The shredding and shredding device shown comprises three shredding and shredding members 21a, 21b and 21c respectively, each consisting of a pair of cylindrical rollers equipped with protuberances and driven in opposite directions. The grinding and shredding member 21a comprises two rollers 22a and 23a driven in synchronism by a drive motor 2 a. These two rollers are provided with a set of teeth or protuberances 25a situated on their periphery and arranged in such a way that the waste is crushed, shredded and divided into elements whose average dimensions are between a few millimeters and a few centimeters.
La deuxième étape de broyage et de dechiquetage est effectuée par l'organe 21b qui se compose également de deux rouleaux sensiblement cylindriques respectivement 22b et 23b , également entraînés d' une manière synchronisée en rotation inverse par un moteur 24b . Ces rouleaux portent des protubérances 25b qui sont plus fines et qui ont pour objet de continuer et d' améliorer l'opération de broyage- déchiquetage déjà effectuée par les rouleaux de l' organe précédent. Les éléments divisés obtenus à la sortie de ces organes de broyage et de dechiquetage ont des dimensions qui sont sensiblement inférieures à celles des éléments issus de l' organe 21a .The second stage of grinding and shredding is carried out by the member 21b which also consists of two substantially cylindrical rollers 22b and 23b respectively, also driven in a synchronized manner in reverse rotation by a motor 24b. These rollers carry protrusions 25b which are finer and which have the purpose of continuing and improving the grinding-shredding operation already carried out by the rollers of the previous member. The divided elements obtained at the outlet of these grinding and shredding members have dimensions which are substantially smaller than those of the elements coming from member 21a.
La troisième étape de broyage et de dechiquetage s' effectue dans l'organe 21c qui comporte comme précédemment deux rouleaux cylindriques 22c et 23c entraînés en rotation inverse par un moteu d' entraînement 24c . Ces rouleaux comportent un ensemble de protubérances 25c disposées sur leur périphérie. Ces protubérances sont en nombre plus élevé et disposées de façon plus rapprochée que celles des rouleaux des organes décrits précédemment , dans le but de compléter l' action de broyage et de dechiquetage et d'obtenir des particules finement divisées dont les dimensions sont en moyenne inférieures ou égales au centimètre.The third stage of grinding and shredding takes place in the member 21c which comprises, as before, two cylindrical rollers 22c and 23c driven in reverse rotation by a drive motor 24c. These rollers include a set of protrusions 25c arranged on their periphery. These protrusions are higher in number and arranged more closely than those of the rollers of the members described above, in order to complete the action of grinding and shredding and to obtain finely divided particles whose dimensions are on average smaller or equal to the centimeter.
A la sortie du dispositif de broyage et de dechiquetage, les particules finement divisées 26 sont recueillies par une trémie 27 qui les dirige à travers un sas 28 sur l' entrée 29 du dispositif 12 de traitement à la vapeur. Ce dispositif 12 se compose essentiellement d'un tambour extérieur 30 à l'intérieur duquel est montée une cuve rotative 31 dont la paroi intérieure est tapissée d' un certain nombre d' ailettes radiales 32 dont le rôle sera défini ci-dessous . Cette cuve rotative comporte une ouverte 33 qui peut être fermée par un secteur d' obturation 34 monté sur deux bras latéraux 35 pivotant autour de l' axe de rotation 36 de la cuve. Comme le montre plus particulièrement la figure 2, la cuve se présente sous la forme d' un tambour cylindrique dont la paroi latérale est perforée et comporte un ensemble d' ouvertures calibrées 37 permettant l' écoulement des substances liquides et de l' eau obtenue par condensation de la vapeur d' eau utilisée pour le traitement. Un moteur d' entraînement 38 est couplé à l'axe de la cuve rotative 31 pour assurer son entraînement au cours du traitement et le brassage continu des particules finement divisées contenues dans cette cuve , au moyen des ailettes radiales 32.On leaving the grinding and shredding device, the finely divided particles 26 are collected by a hopper 27 which directs them through an airlock 28 to the inlet 29 of the device 12 for steam treatment. This device 12 essentially consists of an outer drum 30 inside of which is mounted a rotary tank 31, the inner wall of which is lined with a certain number of radial fins 32, the role of which will be defined below. This rotary tank has an open 33 which can be closed by a sealing sector 34 mounted on two lateral arms 35 pivoting around the axis of rotation 36 of the tank. As shown more particularly in Figure 2, the tank is in the form of a cylindrical drum whose side wall is perforated and has a set of calibrated openings 37 allowing the flow of liquid substances and water obtained by condensation of water vapor used for treatment. A drive motor 38 is coupled to the axis of the rotary tank 31 to ensure its drive during the treatment and the continuous mixing of the finely divided particles contained in this tank, by means of the radial fins 32.
A l'intérieur de la cuve est monté un manchon 39 coaxial à l'axe 36 de cette cuve , ce manchon étant perforé à sa périphérie et comportant une série d' ouvertures constituant des injecteurs 40 conçus pour insuffler de la vapeur d' eau surchauffée à l'intérieur de la cuve 31.Inside the tank is mounted a sleeve 39 coaxial with the axis 36 of this tank, this sleeve being perforated at its periphery and comprising a series of openings constituting injectors 40 designed to inject superheated water vapor inside the tank 31.
Cette vapeur d' eau est amenée par un conduit 4.1 raccordé à un générateur de vapeur d' eau 2 associé à une chaudière 43. On notera qu' un conduit 44 , également connecté au générateur 42 de vapeur d' eau, assure le retour de la vapeur d' eau et définit avec le conduit LX un circuit fermé dans lequel la vapeur d' eau de traitement circule entre le générateur de vapeur d' eau 42 et la cuve de traitement 31 Par ailleurs , un conduit 45 relie le tambour 30 , dans lequel est logé la cuve de traitement 31 , à la chaudière 43 pour recueillir le substances liquides s' échappant par les ouvertures 37 de la cuve 31 les diriger vers la chaudière 43. Par ailleurs un conduit 46 aspire l'ai contenu à l' intérieur du dispositif de broyage et de dechiquetage 1 pour l' injecter également dans la chaudière A3 en vue de la destructio des éventuelles substances contaminantes qu' il pourrait véhiculer .This water vapor is supplied by a conduit 4.1 connected to a water vapor generator 2 associated with a boiler 43. It will be noted that a conduit 44, also connected to the water vapor generator 42, ensures the return of water vapor and defines with the LX conduit a closed circuit in which the process water vapor circulates between the steam generator 42 and the treatment tank 31 Furthermore, a duct 45 connects the drum 30, in which the treatment tank 31 is housed, to the boiler 43 to collect the liquid substances escaping through the openings 37 of the tank 31 direct them towards the boiler 43. Furthermore, a conduit 46 sucks the contents inside the grinding and shredding device 1 to also inject it into the boiler A3 for the destruction of the any contaminating substances that it could transport.
Dans la pratique, l'installation fonctionne de la manière suivante : le déchets sont amenés dans la trémie d'entrée 17 et sont broyés déchiquetés dans le dispositif de broyage et de dechiquetage 11 pou être transformés en particules 26 finement divisées . Après cett première opération purement mécanique, ces particules sont introduite dans la cuve 31 après ouverture du secteur d'obturation 34. Aprè fermeture de la cuve 31 , celle-ci est mise en rotation et de la vape d' eau surchauffée est insufflée dans la zone centrale voisine de l'ax de la cuve au moyen des injecteurs 40. Pendant cette mise en rotatio les particules sont brassées d' une manière continue par les ailette radiales 32 et sont de ce fait soumises d' une manière continue au différents jets de vapeur générés par les injecteurs . L' effet combi du brassage et de l'injection continue de vapeur d'eau surchauffée s ces particules finement divisées provoque la destruction totale d contaminants biologiques éventuellement portés par ces particules . traitement dure pendant un temps prédéterminé qui est fonction de température de la vapeur et éventuellement du degré de contaminatio des déchets à traiter . A la fin du traitement , la cuve est placée da une position telle que son ouverture 33 soit située dans sa part inférieure . L'ouverture se fait par pivotement des bras 35 glissement latéral du secteur d'obturation 34. Les particules fineme divisées traitées à la vapeur sont évacuées par les moyens d'évacuati 14 qui comportent de préférence une vis sans fin 47 entraînée par u moteur électrique 48, et dont la fonction est de transvaser les déche traités dans un conteneur ou dans un dispositif compacteur approprié . Ces déchets traités sont classés dans la catégorie d ordures ménagères et peuvent être manipulés sans aucun danger, voire utilisés dans des chaînes de valorisation de déchets connues en soi.In practice, the installation works in the following way: the waste is brought into the inlet hopper 17 and is crushed shredded in the grinding and shredding device 11 to be transformed into finely divided particles 26. After this first purely mechanical operation, these particles are introduced into the tank 31 after opening the shutter sector 34. After closing the tank 31, the latter is rotated and the superheated water vape is blown into the central zone close to the axis of the tank by means of the injectors 40. During this rotation, the particles are continuously stirred by the radial fins 32 and are therefore continuously subjected to the different jets of steam generated by the injectors. The combined effect of stirring and continuous injection of superheated water vapor s these finely divided particles causes the total destruction of biological contaminants possibly carried by these particles. treatment lasts for a predetermined time which is a function of steam temperature and possibly the degree of contamination of the waste to be treated. At the end of the treatment, the tank is placed in a position such that its opening 33 is located in its lower part. The opening is made by pivoting of the arms 35 lateral sliding of the obturation sector 34. The finely divided particles treated with steam are evacuated by the evacuation means 14 which preferably comprise an endless screw 47 driven by an electric motor 48, and whose function is to transfer the treated waste into a container or into an appropriate compacting device. This treated waste is classified in category d household waste and can be handled without any danger, or even used in waste recovery chains known per se.
La présente invention n' est pas limitée aux formes de réalisations décrites et peut subir différentes modifications présentées sous diverses variantes évidentes pour l'homme de l'art . En particulier le dispositif d' évacuation peut être différent de celui qui est représenté par les figures . On pourrait envisager le recours à une bande transporteuse sans fin , ou à un dispositif de conditionnement quelconque ou tout simplement le déversement dans des conteneurs ou des wagonnets de transport . The present invention is not limited to the embodiments described and may undergo various modifications presented in various variants obvious to those skilled in the art. In particular, the evacuation device may be different from that shown in the figures. One could consider the use of an endless conveyor belt, or some type of packaging device or simply the dumping in containers or transport wagons.

Claims

Revendications claims
1 . Procédé d' hygiénisation de déchets pouvant contenir de contaminants biologiques , notamment de déchets hospitaliers , caractérisé en ce que l' on transforme mécaniquement ces déchets pou réaliser des particules finement divisées au cours d' au moins une étap de broyage et de dechiquetage , en ce que l' on traite ces particule finement divisées au moyen de vapeur d' eau pour rendre inertes le contaminants biologiques contenus dans ces déchets , et en ce que l'o évacue ces particules après décontamination dans des conteneurs d stockage et/ou de transport .1. Method for hygienizing waste which may contain biological contaminants, in particular hospital waste, characterized in that this waste is mechanically transformed in order to produce finely divided particles during at least one stage of grinding and shredding, in that that these finely divided particles are treated by means of steam to make the biological contaminants contained in this waste inert, and that the o removes these particles after decontamination in storage and / or transport containers.
2. Procédé selon la revendication 1 , caractérisé en ce que l' o transforme mécaniquement lesdits déchets en les soumettant à au moin deux étapes de broyage et de dechiquetage , la première étap consistant à les diviser pour en faire des éléments dont les dimension moyennes sont inférieures à une première valeur donnée et la dernièr étape consistant à diviser ces éléments pour en faire lesdites particule finement divisées dont les dimensions moyennes ont une deuxièm valeur inférieure à ladite première valeur .2. Method according to claim 1, characterized in that o mechanically transforms said waste by subjecting it to at least two stages of grinding and shredding, the first step consisting in dividing them to make them elements whose average dimensions are less than a first given value and the last step of dividing these elements to make them said finely divided particle whose average dimensions have a second value less than said first value.
3. Procédé selon la revendication 1 , caractérisé en ce que le traitemen à la vapeur d' eau s' effectue dans une cuve dans laquelle les particule finement divisées sont brassées et dans laquelle on insuffle de l vapeur d' eau surchauffée .3. Method according to claim 1, characterized in that the steam treatment is carried out in a tank in which the finely divided particles are stirred and in which superheated steam is blown.
. Procédé selon la revendication 3 , caractérisé en ce que l' on brass les particules finement divisées en faisant tourner la cuve autour d' u axe central , cette cuve comportant des ailettes radiales fixes disposée sur sa paroi intérieure pour assurer le brassage desdites particules a cours de sa rotation .. Method according to claim 3, characterized in that the finely divided particles are stirred by rotating the tank around a central axis, this tank comprising fixed radial fins arranged on its inner wall to ensure the mixing of said particles during of its rotation.
5. Procédé selon la revendication 4 , caractérisé en ce qu' on insuffle d la vapeur d' eau surchauffée dans la cuve au moyen d' au moins u injecteur localisé dans une zone centrale voisine de l' axe de la cuve . 5. Method according to claim 4, characterized in that the superheated water vapor is injected into the tank by means of at least one injector located in a central zone close to the axis of the tank.
6. Procédé selon la revendication 4, caractérisé en ce que l'on effectue le traitement à la vapeur des particules finement divisées en maintenant ces particules dans la cuve en rotation et en insufflant continûment de la vapeur surchauffée, pendant un temps déterminé qui est fonction de la température de la vapeur.6. Method according to claim 4, characterized in that one carries out the steam treatment of the finely divided particles by keeping these particles in the tank in rotation and by continuously blowing in superheated steam, for a determined time which is dependent of the steam temperature.
7. Procédé selon la revendication 6, caractérisée en ce que l'on évacue les particules finement divisées après leur traitement à la vapeur d'eau surchauffée, au moyen d'une vis sans fin.7. Method according to claim 6, characterized in that the finely divided particles are removed after their treatment with superheated steam, by means of a worm.
8. Procédé selon la revendication 1 , caractérisé en ce que l'on alimente une chaudière d' un générateur de vapeur d'eau au moyen d'air aspiré à l'intérieur d'un dispositif dans lequel on effectue ladite transformation mécanique pour réaliser lesdites particules finement divisées .8. Method according to claim 1, characterized in that a boiler is supplied to a steam generator by means of air drawn inside a device in which said mechanical transformation is carried out to carry out said finely divided particles.
9. Procédé selon la revendication 8, caractérisé en ce que l'on recycle la vapeur d'eau utilisée au cours de l' étape de traitement des particules finement divisées en créant un circuit fermé de vapeur d'eau entre le générateur de vapeur d' eau et la cuve de traitement.9. Method according to claim 8, characterized in that the water vapor used during the step of treating the finely divided particles is recycled by creating a closed circuit of water vapor between the steam generator d and the treatment tank.
10. nstallation d'hygiénisation de déchets pouvant contenir des contaminants biologiques , notamment de déchets hospitaliers , caractérisée en ce qu'elle comporte un dispositif (11) de broyage et de dechiquetage pour transformer mécaniquement lesdits déchets en particules finement divisées , un dispositif (12) pour traiter ces particules finement divisées au moyen de vapeur d'eau pour neutraliser les contaminants biologiques contenus dans ces déchets , et des moyens (14) pour évacuer les particules après décontamination dans des conteneurs de stockage et/ou de transport.10. A facility for hygienizing waste which may contain biological contaminants, in particular hospital waste, characterized in that it comprises a device (11) for grinding and shredding to mechanically transform said waste into finely divided particles, a device (12 ) to treat these finely divided particles by means of water vapor to neutralize the biological contaminants contained in this waste, and means (14) for removing the particles after decontamination in storage and / or transport containers.
11. nstallation selon la revendication 10, caractérisée en ce que le dispositif (11) de broyage et de dechiquetage comporte au moins un premier organe (21a) de broyage et de dechiquetage grossier, agencé pour diviser lesdits déchets en éléments dont les dimensions moyenne sont inférieures à une première valeur donnée , et au moins u deuxième organe (21c) de broyage et de dechiquetage agencé pou diviser ces éléments en particules plus fines dont - les dimension moyennes ont une valeur inférieure à ladite première valeur donnée.11. Installation according to claim 10, characterized in that the device (11) for grinding and shredding comprises at least one first member (21a) for coarse grinding and shredding, arranged to divide said waste into elements whose average dimensions are less than a first given value, and at least u second member (21c) for grinding and shredding arranged to divide these elements into finer particles whose - the average dimensions have a lower value at said first given value.
12. Installation selon la revendication 11 , caractérisée en ce que ledi premier organe (21a) comporte au moins une paire de rouleaux (22a 23a) cylindriques pourvus de protubérances (25a) , ces rouleaux étan entraînés en rotation inverse, en ce que ledit deuxième organe (21c comporte également au moins une paire de rouleaux (22c, 23c cylindriques pourvus de protubérances (25c) , et en ce que le protubérances des rouleaux du deuxième organe sont plus nombreuse et plus rapprochées les unes des autres que celles des rouleaux d premier organe.12. Installation according to claim 11, characterized in that ledi first member (21a) comprises at least one pair of cylindrical rollers (22a 23a) provided with protuberances (25a), these etan rollers driven in reverse rotation, in that said second member (21c also comprises at least one pair of cylindrical rollers (22c, 23c provided with protuberances (25c), and in that the protuberances of the rollers of the second member are more numerous and closer to each other than those of the first rollers organ.
13. Installation selon la revendication 11 , caractérisée en ce que le organes (21a, 21b , 21c) de broyage et de dechiquetage sont disposé sur une même verticale de telle manière que les déchets soient broyé et déchiquetés de plus en plus finement en passant d' un organe a suivant par gravité.13. Installation according to claim 11, characterized in that the members (21a, 21b, 21c) of grinding and shredding are arranged on the same vertical so that the waste is crushed and shredded more and more finely by passing d 'an organ has following by gravity.
14. Installation selon la revendication 10, caractérisée en ce que l dispositif ( 12) de traitement à la vapeur est disposé sous le dispositi ( 11 ) de broyage et de dechiquetage, de telle manière que le particules finement divisées passent du premier dispositif au secon par gravité.14. Installation according to claim 10, characterized in that the device (12) for steam treatment is arranged under the device (11) for grinding and shredding, so that the finely divided particles pass from the first device to the second by gravity.
15. Installation selon la revendication 10, caractérisée en ce que l dispositif ( 12) de traitement à la vapeur comporte une cuve (31 équipée de moyens pour brasser lesdites particules finement divisées e des moyens pour insuffler de la vapeur surchauffée.15. Installation according to claim 10, characterized in that the device (12) for steam treatment comprises a tank (31 equipped with means for brewing said finely divided particles e means for injecting superheated steam.
16. Installation selon la revendication 15 , caractérisée en ce que le moyens pour brasser les particules finement divisées comportent de ailettes radiales (32) disposées le long de la paroi intérieure de la cuve et en ce que cette cuve est rotative autour d'un axe central (33) .16. Installation according to claim 15, characterized in that the means for stirring the finely divided particles comprise radial fins (32) arranged along the inner wall of the tank and in that this tank is rotatable about a central axis (33).
17. Installation selon la revendication 16, caractérisée en ce que les moyens pour insuffler la vapeur d' eau surchauffée comportent au moins un injecteur disposé à proximité de l'axe central (33) de la cuve rotative.17. Installation according to claim 16, characterized in that the means for blowing the superheated water vapor comprise at least one injector disposed near the central axis (33) of the rotary tank.
18. Installation selon la revendication 10, caractérisée en ce qu'elle comporte des moyens (46) pour aspirer l'air dans le dispositif de broyage et de dechiquetage et pour l'injecter dans la chaudière (43) du générateur de vapeur d'eau (42) . 18. Installation according to claim 10, characterized in that it comprises means (46) for sucking the air into the grinding and shredding device and for injecting it into the boiler (43) of the steam generator. water (42).
PCT/FR1993/000096 1992-01-30 1993-01-29 Waste sanitizing method and plant for implementing same WO1993014795A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP5512993A JPH06506382A (en) 1992-01-30 1993-01-29 Waste disinfection method and plant for implementing it
CA002107226A CA2107226A1 (en) 1992-01-30 1993-01-29 Waste hygienization equipment and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9201188A FR2686794B1 (en) 1992-01-30 1992-01-30 PROCESS FOR HYGIENIZING WASTE AND INSTALLATION FOR CARRYING OUT THIS PROCESS.
FR92/01188 1992-01-30

Publications (1)

Publication Number Publication Date
WO1993014795A1 true WO1993014795A1 (en) 1993-08-05

Family

ID=9426281

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1993/000096 WO1993014795A1 (en) 1992-01-30 1993-01-29 Waste sanitizing method and plant for implementing same

Country Status (5)

Country Link
EP (1) EP0577819A1 (en)
JP (1) JPH06506382A (en)
CA (1) CA2107226A1 (en)
FR (1) FR2686794B1 (en)
WO (1) WO1993014795A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995032063A1 (en) * 1994-05-24 1995-11-30 Ets Lajtos S.A. Facility for grinding and decontaminating waste, particularly hospital waste
WO1997015408A1 (en) * 1995-10-23 1997-05-01 Gbattista Bruno Iucolano Apparatus for transforming urban waste into sterile muds
EP0763390A3 (en) * 1995-09-13 1998-03-04 Carmelo Rivera Montanes System for treating hospital waste, starting from bags of the said waste
EP0908190A2 (en) * 1997-10-09 1999-04-14 General Waste Reduction Limited Waste sterilisation
AT405718B (en) * 1998-04-07 1999-11-25 Mut Maschinen Umwelttechnik Arrangement for sanitization of bulk material
WO2000038744A1 (en) * 1998-12-24 2000-07-06 Medivac Technology Pty Limited Waste treatment apparatus
WO2003024633A1 (en) * 2001-09-20 2003-03-27 Thermsave Engineering Uk Limited Improved waste treatment
WO2003049863A1 (en) * 2001-12-11 2003-06-19 Medivac Technology Pty Limited Waste treatment apparatus
WO2003049864A1 (en) * 2001-12-11 2003-06-19 Medivac Technology Pty Limited Waste treatment apparatus
CN104148376A (en) * 2014-08-15 2014-11-19 山东新华医用环保设备有限公司 Integrative machine for first crushing medical waste and then sterilizing medical waste
CN105499258A (en) * 2016-01-19 2016-04-20 陈吉美 Medical waste crushing treatment device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH694115A5 (en) * 1999-07-05 2004-07-30 Luna Two Sa Procedure and plant for the sterilization and elimination of potentially infectious waste.
JP4555399B2 (en) * 2008-07-04 2010-09-29 清正工業株式会社 Medical waste treatment equipment
JP5620760B2 (en) * 2010-09-03 2014-11-05 カワテックス株式会社 Sterilization system
JP2013220131A (en) * 2012-04-13 2013-10-28 Green:Kk Sterilization device and method for sterilization

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731208A (en) * 1952-01-28 1956-01-17 Hospital Sanitation Equipment Apparatus for disposing of contaminated waste
FR2240041A1 (en) * 1973-08-07 1975-03-07 Vandekerckhove Constr Slaughterhouse waste sterilizer - with stirrer mechanism of hollow compo-nents for fluid circulation
DE2550142A1 (en) * 1975-11-07 1977-05-18 Muenchner Medizin Mechanik DEVICE FOR DISINFECTING AND / OR STERILIZING MATERIALS CONSISTING AT LEAST PARTLY OF SOLIDS, IN PARTICULAR SOLIDS CARRYING WATER
EP0081727A2 (en) * 1981-12-15 1983-06-22 Intec S.R.L. Plant for treating solid urban refuse
WO1990001340A1 (en) * 1988-08-08 1990-02-22 Rolf Emil Roland Process and heated conveyor for disinfecting contaminated, size-reduced hospital refuse
DE3938546C1 (en) * 1989-11-21 1990-07-12 Christel 2000 Hamburg De Silber Feed worms in high temp. hospital waste disinfector - have separate high pressure steam and sub-atmos-zones

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731208A (en) * 1952-01-28 1956-01-17 Hospital Sanitation Equipment Apparatus for disposing of contaminated waste
FR2240041A1 (en) * 1973-08-07 1975-03-07 Vandekerckhove Constr Slaughterhouse waste sterilizer - with stirrer mechanism of hollow compo-nents for fluid circulation
DE2550142A1 (en) * 1975-11-07 1977-05-18 Muenchner Medizin Mechanik DEVICE FOR DISINFECTING AND / OR STERILIZING MATERIALS CONSISTING AT LEAST PARTLY OF SOLIDS, IN PARTICULAR SOLIDS CARRYING WATER
EP0081727A2 (en) * 1981-12-15 1983-06-22 Intec S.R.L. Plant for treating solid urban refuse
WO1990001340A1 (en) * 1988-08-08 1990-02-22 Rolf Emil Roland Process and heated conveyor for disinfecting contaminated, size-reduced hospital refuse
DE3938546C1 (en) * 1989-11-21 1990-07-12 Christel 2000 Hamburg De Silber Feed worms in high temp. hospital waste disinfector - have separate high pressure steam and sub-atmos-zones

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995032063A1 (en) * 1994-05-24 1995-11-30 Ets Lajtos S.A. Facility for grinding and decontaminating waste, particularly hospital waste
EP0763390A3 (en) * 1995-09-13 1998-03-04 Carmelo Rivera Montanes System for treating hospital waste, starting from bags of the said waste
ES2128207A1 (en) * 1995-09-13 1999-05-01 Rivera Montanes Carmelo System for treating hospital waste, starting from bags of the said waste
WO1997015408A1 (en) * 1995-10-23 1997-05-01 Gbattista Bruno Iucolano Apparatus for transforming urban waste into sterile muds
EP0908190A2 (en) * 1997-10-09 1999-04-14 General Waste Reduction Limited Waste sterilisation
EP0908190A3 (en) * 1997-10-09 1999-09-29 General Waste Reduction Limited Waste sterilisation
AT405718B (en) * 1998-04-07 1999-11-25 Mut Maschinen Umwelttechnik Arrangement for sanitization of bulk material
WO2000038744A1 (en) * 1998-12-24 2000-07-06 Medivac Technology Pty Limited Waste treatment apparatus
WO2003024633A1 (en) * 2001-09-20 2003-03-27 Thermsave Engineering Uk Limited Improved waste treatment
WO2003049863A1 (en) * 2001-12-11 2003-06-19 Medivac Technology Pty Limited Waste treatment apparatus
WO2003049864A1 (en) * 2001-12-11 2003-06-19 Medivac Technology Pty Limited Waste treatment apparatus
CN104148376A (en) * 2014-08-15 2014-11-19 山东新华医用环保设备有限公司 Integrative machine for first crushing medical waste and then sterilizing medical waste
CN105499258A (en) * 2016-01-19 2016-04-20 陈吉美 Medical waste crushing treatment device

Also Published As

Publication number Publication date
CA2107226A1 (en) 1993-07-31
FR2686794B1 (en) 1995-06-16
JPH06506382A (en) 1994-07-21
FR2686794A1 (en) 1993-08-06
EP0577819A1 (en) 1994-01-12

Similar Documents

Publication Publication Date Title
WO1993014795A1 (en) Waste sanitizing method and plant for implementing same
CA2129896C (en) Process, machine and plant for extraction by evaporation of the solid residues of a fluid substance
FR2654936A1 (en) PROCESS FOR THE TREATMENT AND DISPOSAL OF MEDICAL WASTE AND DEVICE FOR IMPLEMENTING THE PROCESS.
CA2954947A1 (en) System for the continuous treatment of products by thermal input
FR2644373A1 (en) Waste processing machine
FR2697754A1 (en) Method and machine for the treatment of medical waste
EP0413813A1 (en) Devices for treating human or animal dejections by means of micro-waves.
FR2842427A1 (en) DEVICE FOR PARCELLIZING AND DISINFECTING WASTE, PARTICULARLY MEDICAL WASTE
US5433390A (en) Decentralized solid waste recycling systems
EP0714241A1 (en) Device for continuously washing products, especially plant products
FR2953726A1 (en) PROCESS FOR TREATING INFECTIOUS RISK WASTE AND EQUIPMENT FOR CARRYING OUT SAID METHOD
EP0452231B1 (en) Method for sterilization of contaminated waste and device for carrying-out thereof
CA2314526C (en) Drum for garbage processing apparatus and associated apparatus
EP4168188A1 (en) System and method for making waste safe
WO2000067808A1 (en) Method and device for grinding and disinfecting medical waste
FR2715087A1 (en) Heat treatment plant for hazardous waste
EP1131109B1 (en) Method and apparatus for treating contaminated waste
EP1370145A1 (en) Method for microbiological decontamination of powdery products
EP0574328A1 (en) Method of treating and neutralizing wastes containing pathogens
FR2752228A1 (en) Waste bin filling system
BE423522A (en)
WO2001002027A1 (en) Process for sterilizing and disposing of potentially contaminated waste
EP0412004A2 (en) Rotary comminutor and container for manipulating objects containing toxic or radioactive elements
FR2757063A1 (en) METHOD AND DEVICE FOR TREATING MATERIALS, ESPECIALLY STERILIZING INFECTIOUS MEDICAL WASTE
AU765307B2 (en) Waste treatment apparatus

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

WWE Wipo information: entry into national phase

Ref document number: 2107226

Country of ref document: CA

ENP Entry into the national phase

Ref document number: 1993 122547

Country of ref document: US

Date of ref document: 19930929

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1993904138

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1993904138

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1993904138

Country of ref document: EP