EP1847791A1 - Method of drying sludge and apparatus for carrying out the method - Google Patents

Method of drying sludge and apparatus for carrying out the method Download PDF

Info

Publication number
EP1847791A1
EP1847791A1 EP07290491A EP07290491A EP1847791A1 EP 1847791 A1 EP1847791 A1 EP 1847791A1 EP 07290491 A EP07290491 A EP 07290491A EP 07290491 A EP07290491 A EP 07290491A EP 1847791 A1 EP1847791 A1 EP 1847791A1
Authority
EP
European Patent Office
Prior art keywords
enclosure
sludge
drying
pressure
microwaves
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.)
Granted
Application number
EP07290491A
Other languages
German (de)
French (fr)
Other versions
EP1847791B1 (en
Inventor
Bernard Dedieu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BARBOSA, ARTHUR
SARL INNOPARTS
BEARN INNOVATION
Original Assignee
SARL INNOPARTS
BEARN INNOVATION
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 SARL INNOPARTS, BEARN INNOVATION filed Critical SARL INNOPARTS
Priority to PL07290491T priority Critical patent/PL1847791T3/en
Publication of EP1847791A1 publication Critical patent/EP1847791A1/en
Application granted granted Critical
Publication of EP1847791B1 publication Critical patent/EP1847791B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers

Definitions

  • the present invention relates to a sludge drying process and the device for carrying out the process, and more particularly to a method and its device for drying industrial, mixed or urban sludge.
  • Another solution is initially to dry the sludge and then put in the form of granules that can be stored.
  • the drying step is generally carried out by depositing the still wet sludge on a drying bench, the sludge then being traversed by a heated air flow. At the end of this step the sludge is transformed into granules.
  • a disadvantage of this type of treatment is that the drying of the sludge with the heated air flow is too long.
  • the patent FR 2 115 951 proposes a device, which could solve the problem of the too long drying time, allowing to dry products like animal feed or fertilizer, and allowing to sterilize these products, after putting them in the form of previously fragmented sludge.
  • This device comprises a screw conveyor in the form of a tube that will allow the transport of fragmented sludge.
  • the carrier comprises a shaft extending axially with respect to the tube and having blades arranged helically.
  • This transporter has the sole purpose of advancing the fragmented sludge towards the irradiation zone by microwaves. These microwaves have the function of sterilizing the fragments and perfect drying by allowing the release of the remaining moisture of the fragmented sludge. Plots thus dried out of the device and are collected to be packaged.
  • the object of the present invention is to propose a method and its device which make it possible to optimize the sludge drying without risk of explosion while at the same time very rapidly obtaining complete sludge drying and thereby reducing the energy consumed.
  • the sludge is mixed with the mixer to allow a better homogeneity of drying, while greatly promoting the penetration of microwaves in the material.
  • the saturation water vapor pressure is in a range between 1 bar and 3 bars.
  • the saturation water vapor pressure is 1 bar.
  • the superheated steam pressure is between 1 bar and 5 bar.
  • the superheated steam pressure is 3 bar.
  • the temperature of the chamber must be lower than the temperature of the sludge to allow evaporation.
  • the irradiation by microwaves is performed when the temperature of the sludge is between 110 ° C and 140 ° C.
  • the irradiation by microwaves is performed when the temperature of the sludge is 130 ° C.
  • Another object of the invention is to provide a device for carrying out the method.
  • the device for carrying out the method consists of an enclosure, comprising a sealed tank, resistant to pressure and communicating by at least one quartz window or any other material suitable for microwaves. waves with at least one microwave generator, the chamber communicating with a saturated steam inlet path and a sludge inlet to be dried, a mixer comprising means for injecting superheated steam disposed in the enclosure, a unloading hatch of dried materials.
  • the device comprises in its lower part facing the ground an orifice for discharging by gravity runoff controlled by a valve or regulate the internal pressure of the enclosure.
  • the enclosure comprises cooling means arranged in its lowest part so as to cool its inner wall in contact with the pressurized atmosphere, the means being arranged so as to cool only part of the 'pregnant.
  • the cooling means allow to cool between half and 3 ⁇ 4 of the enclosure.
  • the mixer is formed of a tube comprising at least one blade-type mixing element integral with its periphery, the injection means being arranged on this element.
  • the tube is connected to a superheated steam generator, the steam produced by the generator circulating in the tube to reach the mixing element and then be injected by the injection means.
  • the injection means are formed by openings formed on the mixing element.
  • all the openings of the enclosure are closable with closure means ensuring the conditions of tightness to pressure and microwaves.
  • the enclosure comprises cooling means for cooling a portion of its inner surface to promote the condensation of water evaporated by the drying treatment.
  • the device comprises at least one end closable by an automatic door ensuring the conditions of tightness to pressure and microwaves.
  • the microwave generator communicates with the drying chamber through a coupler / microwave adapter.
  • the enclosure comprises a safety valve.
  • the tank is removed from the walls of the enclosure by perforated supports to allow the streaming of the condensed water
  • the device consists of an enclosure (1), preferably cylindrical and of elongate shape made of metallic material with a double wall ensuring on the one hand, both a good insulation thermal and pressure tightness of the vapor and secondly, the tightness to the waves.
  • This enclosure (1) has at least one end open on the outside and closable by a door (10) or a cover (10).
  • the enclosure (1) has a closable end.
  • the door (10) for closing the openings is made so that the enclosure (1) is completely airtight, at the vapor pressure and waves such as microwaves, when the door (10) is closed again.
  • the door (10) therefore comprises a seal (102) made of "Teflon” or silicone for pressure-tightness and metal (101) for microwave-tightness.
  • a seal (102) made of "Teflon” or silicone for pressure-tightness and metal (101) for microwave-tightness.
  • the door (10) can slide through a displacement system (152) having wheels (151) connected to the door. This system thus allows the door to be moved axially relative to the enclosure (1).
  • the sludge is loaded by the opening formed when the door is open.
  • the enclosure (1) is generally placed on the ground, and is held in place by feet (15), the portion resting on the ground forming the lower part of the enclosure (1).
  • the enclosure (1) has inside, an additional wall in its lower part forming a spherical tank (7) in which will be loaded the sludge (5) to be dried.
  • This tank (7) has upper flanges (71) fixed to the enclosure (1) and on which small openings are formed. These openings allow evacuation to the bottom of the chamber (1) condensed water on the inner wall of the enclosure (1).
  • the material (5) to be dried is loaded into the enclosure (1) by a material inlet (8).
  • This inlet (8) is disposed on a face of the enclosure (1) at mid-height thereof.
  • the loading of the material (5) to be dried is done by means of the bowl which is arranged on a trolley (152) which can be moved (151) and can be moved laterally, the unloading being carried out by flipping the tank.
  • the sludge (5) concerned by the invention are sludge type sludge, slurry, waste septic tanks ... etc.
  • the enclosure (1) also comprises at least one rounded or rectangular aperture (2) constituting a window (2).
  • the enclosure (1) comprises a plurality of windows (2). These windows (2) are made of vapor-tight material but passing microwave radiation. In one embodiment, the windows (2) are made of quartz. In another embodiment the windows (2) are "Teflon", or any other material allowing electromagnetic radiation and vapor tightness. These windows (2) under pressure can emit the waves (23) to the inside of the enclosure (1) and are said windows (2) emitter. They thus allow to pass the waves (23) which will then irradiate the sludge (5) to dry. The waves (23) are brought by a waveguide (24) to at least one window (2).
  • the waveguide (24) communicates through an impedance coupler / adapter (21) and the microwave generator (22).
  • the wave generator (22) (23) thus makes it possible to irradiate the sludge (5) to be dried.
  • the windows (2) are arranged in the upper part of the enclosure (1) that is to say the part opposite to that which rests on the ground.
  • the enclosure (1) is vertical, in this case it is higher than wide.
  • the enclosure (1) has an opening at the end opposite to that resting on the ground.
  • the windows (2) are then arranged on the upper part below the opening and therefore below the lid (10).
  • the waves are, at the exit of the windows, perpendicular to the bottom of the tank and are then redirected to arrive vertically in the material (5) to dry.
  • the windows (2) are arranged on the cover (10) and thus allow a direct radiation which arrives vertically in the material (5) to be dried.
  • the tank is arranged horizontally, it is then wider than high.
  • the opening which is always at one end will be disposed on the opposite side to the power supply.
  • the windows (2) are then always arranged in the upper part of the enclosure (1) that is to say in the opposite part to that resting on the ground.
  • the windows (2) are rectangular, they are arranged so as to be inverted relative to one another, ie a window is arranged in the direction of the length and the one next to the direction of the height etc. as illustrated in Figure 2.
  • the enclosure (1) is in communication with at least two pipes with at least two steam generator systems.
  • a first generator (9) generates saturating steam. This steam is injected into the entire enclosure (1) before loading the material (5) to be dried.
  • a second generator (32) generates superheated steam. This superheated steam is directly injected into the material (5) to be dried.
  • This mixer (3) is formed of a tube (31, 31 ') which passes through the enclosure (1).
  • This tube (31, 31 ') is connected to the superheated steam generator (32).
  • the tube (31, 31 ') comprises at minus one element (35, 35 ') mixer.
  • This element (35, 35 ') mixer has means (33, 33') for injecting superheated steam.
  • the injection means (33, 33 ') are formed by openings (33, 33') formed on the mixing element (35, 35 ').
  • the steam produced by the generator (32) flows in the tube to reach the mixing element (35, 35 ') and is then injected by the injection means (33, 33') into the core of the material ( 5) to dry.
  • the mixing element (35) is formed by blades fixed to the end of the tube (31) arriving at the bottom of the enclosure (1).
  • the mixer rotates thanks to a motor (34) disposed outside the enclosure (1).
  • the blades follow the spherical or elliptical shape of the bottom of the tank (7).
  • the tube is offset relative to the axis (A) of symmetry of the tank, that is to say close to the wall remote from the microwave source.
  • the mixing element (35 ') is formed by rectangular blades fixed on the periphery of the tube (31') preferably in a helical geometry and offset from each other.
  • the tube rotates with a motor (34) and behaves like a worm.
  • the material used for the blades is a microwave resistant material.
  • the material may for example be pyrex or "Teflon".
  • the blades are fixed so as not to exceed the material (5) to dry before drying and the amount of material (5) is adapted so that at the end of drying the blades do not exceed too much to avoid problems due to shocks with microwaves.
  • the role of the mixers is on the one hand to mix the sludge (5) to have a homogeneous drying and on the other hand to increase the penetration of microwaves in the sludge (5) and promote drying. Indeed without mixing the mud, a dry crust forms quickly on its surface which prevents the microwaves to penetrate properly, and thus prevents an effective drying and homogeneous.
  • the condensation water is discharged through a pipe (4) controlled by a valve (41) for evacuation and disposed in the lower part of the enclosure.
  • This evacuation valve (41) makes it possible to maintain the enclosure (1) at the desired pressure, to evacuate the pressure if it is too high and finally to put the enclosure (1) in the atmosphere a once the drying process is complete.
  • the upper part of the enclosure (1) comprises a safety valve (12) which is regulated according to the desired pressure and which will be used only in the event of an incident requiring pressure regulation other than with the valve (41). ) evacuation.
  • This valve (12) will therefore, in normal operation of the device, never used.
  • the enclosure (1) also comprises cooling means (203) in its double wall. These cooling means (203) are arranged to allow the cooling of the base portion of the chamber (1) and thus the condensation of the evaporation water.
  • the cooling means (203) are for example coils in which circulates a cooling gas.
  • These cooling means (203) define a cold zone (200) and a hot zone (300) in the enclosure.
  • the separation (202) between the two zones being approximately between half and 3 ⁇ 4 of the lower part of the enclosure.
  • the enclosure (1) has in its lower part a hatch (6) which allows to evacuate the dried material when the drying cycle is completed.
  • the hatch (6) also includes a guide that will allow the mixer (3) to be kept upright and thus prevent its swaying during mixing.
  • the enclosure (1) comprises means (11) for measuring the temperature and the pressure in order to regulate these parameters during drying.
  • the set of openings of the enclosure (1) comprises a valve system (91, 81, 61, 41) allowing the enclosure (1) to remain hermetic and also avoiding the leakage of microwaves.
  • the enclosure (1) comprises a level detector device for the automatic opening of the valve (41).
  • the microwave generator After a while when the sludge is dried, the microwave generator is also stopped and the pressure decreased to gradually reach atmospheric pressure.

Abstract

The method involves loading sludge (5) inside a tub spaced from walls of an enclosure (1) by a material inlet (8). Heated vapor is injected into the sludge by using a mixer (3) operating closer to a tub`s wall that is spaced with respect to a microwave source. The sludge is heated to the core by emission of microwaves (23) of frequencies comprised between 400 and 2450 mega Hertz in a direction of a tub (7). Water collected by condensation on walls of the enclosure is evacuated, via small openings, towards the bottom of the enclosure by using a valve (6) communicating with the exterior. An independent claim is also included for a device permitting to implement a method for drying sludge.

Description

La présente invention concerne un procédé de séchage des boues et le dispositif permettant la mise en oeuvre du procédé, et plus particulièrement un procédé et son dispositif de séchage de boues industrielles, mixtes ou urbaines.The present invention relates to a sludge drying process and the device for carrying out the process, and more particularly to a method and its device for drying industrial, mixed or urban sludge.

Le problème posé par le traitement des boues d'épuration est un problème qui préoccupe très sérieusement les Collectivités locales et les Etats. En effet leur quantité ne cesse d'augmenter, et les risques de pollution toxique, bactériologique et olfactive qu'elles induisent pour les sols, les nappes et l'environnement augmentent aussi. Il est donc nécessaire de disposer d'une technique optimale de traitement et de valorisation de ces boues qui soit sûre, durable, écologique, économique et applicable à tous les cas.The problem posed by the treatment of sewage sludge is a problem that is of great concern to local communities and states. In fact, their quantity is constantly increasing, and the risks of toxic, bacteriological and olfactory pollution that they induce for soils, groundwater and the environment are also increasing. It is therefore necessary to have an optimal technique of treatment and recovery of these sludge that is safe, sustainable, environmentally friendly, economical and applicable to all cases.

Pour faire face à ces problèmes, il existe aujourd'hui plusieurs solutions de traitement des boues.To deal with these problems, there are now several sludge treatment solutions.

On peut notamment citer les traitements par convection, dont le principe repose sur un transfert de chaleur. L'inconvénient de cette technique est qu'elle est très onéreuse.These include convection treatments, whose principle is based on heat transfer. The disadvantage of this technique is that it is very expensive.

Une autre solution consiste dans un premier temps à faire sécher les boues pour ensuite les mettre sous forme de granulés qui pourront être stockés.Another solution is initially to dry the sludge and then put in the form of granules that can be stored.

L'étape de séchage est en général effectuée en déposant les boues encore humides sur un banc de séchage, la boue étant ensuite traversée par un flux d'air chauffé. A l'issu de cette étape les boues sont transformées sous forme de granulés.The drying step is generally carried out by depositing the still wet sludge on a drying bench, the sludge then being traversed by a heated air flow. At the end of this step the sludge is transformed into granules.

Un inconvénient de ce type de traitement est que le séchage des boues avec le flux d'air chauffé est trop long.A disadvantage of this type of treatment is that the drying of the sludge with the heated air flow is too long.

Le brevet FR 2 115 951 propose un dispositif, qui pourrait résoudre le problème du temps de séchage trop long, permettant de sécher des produit type aliments pour animaux ou fertilisant, et permettant de stériliser ces produits, après les avoir mis sous forme de boues préalablement fragmentées. Ce dispositif comprend un transporteur à vis en forme de tube qui va permettre le transport des boues fragmentées. Le transporteur comporte un arbre s'étendant axialement par rapport au tube et comportant des pales disposées en hélice. Ce transporteur à pour but unique de faire avancer les boues fragmentées vers la zone d'irradiation par des micro-ondes. Ces micro-ondes ayant pour fonction d'effectuer la stérilisation des fragments et de parfaire le séchage en permettant le dégagement du restant d'humidité des boues fragmentées. Les parcelles ainsi séchées sortent du dispositif et sont recueillies pour être conditionnées.The patent FR 2 115 951 proposes a device, which could solve the problem of the too long drying time, allowing to dry products like animal feed or fertilizer, and allowing to sterilize these products, after putting them in the form of previously fragmented sludge. This device comprises a screw conveyor in the form of a tube that will allow the transport of fragmented sludge. The carrier comprises a shaft extending axially with respect to the tube and having blades arranged helically. This transporter has the sole purpose of advancing the fragmented sludge towards the irradiation zone by microwaves. These microwaves have the function of sterilizing the fragments and perfect drying by allowing the release of the remaining moisture of the fragmented sludge. Plots thus dried out of the device and are collected to be packaged.

L'inconvénient de ce dispositif est qu'il nécessite plusieurs étapes pour arriver au séchage des produits, et notamment une étape de fragmentation des boues à sécher. Ces différentes étapes nécessitant un appareillage plus complexe et plus encombrant.The disadvantage of this device is that it requires several steps to arrive at the drying of the products, and in particular a fragmentation step of the sludge to be dried. These different steps require a more complex and more cumbersome apparatus.

Un autre inconvénient de ces dispositifs de séchages est que dans certain cas des risques d'inflammation ou d'explosion peuvent apparaître. Les risques d'explosion existent si trois facteurs sont présents : une grande teneur en poussières, un forte teneur en oxygène et une source d'ignition. Il est donc important d'éviter la présence d'un des ces trois facteurs.Another disadvantage of these drying devices is that in some cases the risk of ignition or explosion may appear. The risk of explosion exists if three factors are present: a high dust content, a high oxygen content and a source of ignition. It is therefore important to avoid the presence of any of these three factors.

De plus les dispositifs de ces techniques sont chers et leur utilisation couteuse en énergie.Moreover the devices of these techniques are expensive and their use expensive in energy.

Lorsque le séchage est correctement effectué, la boue séchée peut s'auto-échauffer ce qui peut provoquer une source d'ignition. Ce facteur d'ignition est donc souvent présent lors du séchage des boues. Il faut donc faire en sorte d'éviter la présence des deux autres facteurs à savoir les poussières et la teneur en oxygène.When drying is properly done, the dried sludge can self-heat which can cause a source of ignition. This ignition factor is therefore often present during sludge drying. It is therefore necessary to avoid the presence of the other two factors namely dust and oxygen content.

La présente invention a pour but de proposer un procédé et son dispositif qui permettent d'optimiser le séchage des boues sans risque d'explosion tout en obtenant très rapidement un séchage complet des boues et de ce fait en réduisant l'énergie consommée.The object of the present invention is to propose a method and its device which make it possible to optimize the sludge drying without risk of explosion while at the same time very rapidly obtaining complete sludge drying and thereby reducing the energy consumed.

Ce but est atteint par le fait que le procédé de séchage de boue telles que les boues dépuration, le lisier ou les déchets de fosses septiques comporte:

  • une étape de mise en pression à une pression déterminée d'une enceinte étanche au moins par injection de vapeur d'eau saturante et de maintien de cette pression pendant un temps déterminé ;
  • une étape de chargement des boues à l'intérieur d'une cuve éloignée des parois de l'enceinte avec des moyens de chargement assurant le maintien en pression ;
  • une étape d'injection de vapeur surchauffée dans la boue par l'intermédiaire d'un mélangeur en action proche de la paroi de la cuve la plus éloignée par rapport à la source des micro-ondes comportant des moyens d'injections ;
  • une étape de chauffage au coeur de la boue par émission de micro-ondes dans des fréquences comprises entre 400 et 2450 MHz en direction de la cuve, cette étape étant réalisée en mélangeant la boue ;
  • une étape d'évacuation des eaux recueillies par condensation et ruissellement sur les parois de l'enceinte vers le fond de l'enceinte par l'intermédiaire d'une vanne communiquant avec l'extérieur.
This object is achieved by the fact that the sludge drying process such as sewage sludge, slurry or septic waste includes:
  • a step of pressurizing at a predetermined pressure of a sealed enclosure at least by saturating steam injection and maintaining this pressure for a predetermined time;
  • a step of loading the sludge inside a tank remote from the walls of the enclosure with loading means ensuring the maintenance pressure;
  • a step of injecting superheated steam into the sludge through a mixer in action close to the wall of the tank furthest away from the source of the microwaves comprising injection means;
  • a heating step in the heart of the sludge by microwave emission in frequencies between 400 and 2450 MHz in the direction of the tank, this step being performed by mixing the sludge;
  • a step of evacuating water collected by condensation and runoff on the walls of the enclosure towards the bottom of the enclosure via a valve communicating with the outside.

Selon une autre particularité, pendant toute la durée du séchage la boue est mélangée avec le mélangeur pour permettre une meilleure homogénéité du séchage, tout en favorisant considérablement la pénétration des micro-ondes dans la matière.According to another feature, throughout the drying period the sludge is mixed with the mixer to allow a better homogeneity of drying, while greatly promoting the penetration of microwaves in the material.

Selon une autre particularité, la pression de vapeur d'eau saturante est comprise dans une plage entre 1 bar et 3 bars.According to another feature, the saturation water vapor pressure is in a range between 1 bar and 3 bars.

Selon une autre particularité, la pression de vapeur d'eau saturante est de 1 bar.According to another feature, the saturation water vapor pressure is 1 bar.

Selon une autre particularité, la pression de vapeur surchauffée est comprise entre 1 bar et 5 bars.According to another feature, the superheated steam pressure is between 1 bar and 5 bar.

Selon une autre particularité, la pression de vapeur surchauffée est de 3 bars.According to another feature, the superheated steam pressure is 3 bar.

Selon une autre particularité, la température de l'enceinte doit être inférieure à la température de la boue pour permettre une évaporation.According to another feature, the temperature of the chamber must be lower than the temperature of the sludge to allow evaporation.

Selon une autre particularité, l'irradiation par les micro-ondes est effectuée lorsque la température de la boue est comprise entre 110°C et 140°C.According to another feature, the irradiation by microwaves is performed when the temperature of the sludge is between 110 ° C and 140 ° C.

Selon une autre particularité, l'irradiation par les micro-ondes est effectuée lorsque la température de la boue est de 130°C.According to another feature, the irradiation by microwaves is performed when the temperature of the sludge is 130 ° C.

Un autre but de l'invention est de proposer un dispositif permettant la mise en oeuvre du procédé.Another object of the invention is to provide a device for carrying out the method.

Ce but est atteint par le fait que le dispositif permettant la mise en oeuvre du procédé est constitué d'une enceinte, comportant une cuve étanche, résistante à la pression et communiquant par au moins une fenêtre en quartz ou toute autre matière convenant aux micro-ondes avec au moins un générateur de micro-ondes, l'enceinte communiquant avec un chemin d'arrivée de vapeur saturante et une arrivée de boue à sécher, un mélangeur comportant des moyens d'injection de vapeur surchauffée disposé dans l'enceinte, une trappe de déchargement des matières séchées.This object is achieved by the fact that the device for carrying out the method consists of an enclosure, comprising a sealed tank, resistant to pressure and communicating by at least one quartz window or any other material suitable for microwaves. waves with at least one microwave generator, the chamber communicating with a saturated steam inlet path and a sludge inlet to be dried, a mixer comprising means for injecting superheated steam disposed in the enclosure, a unloading hatch of dried materials.

Selon une autre particularité, le dispositif comporte dans sa partie la plus basse orientée vers le sol un orifice permettant d'évacuer par gravité des eaux de ruissellement contrôlé par une vanne ou de réguler la pression interne de l'enceinte.According to another feature, the device comprises in its lower part facing the ground an orifice for discharging by gravity runoff controlled by a valve or regulate the internal pressure of the enclosure.

Selon une autre particularité, l'enceinte comporte des moyens réfrigérants disposés dans sa partie la plus basse de façon à refroidir sa paroi interne en contact avec l'atmosphère sous pression, les moyens étant disposés de façon à ne refroidir qu'une partie de l'enceinte.According to another feature, the enclosure comprises cooling means arranged in its lowest part so as to cool its inner wall in contact with the pressurized atmosphere, the means being arranged so as to cool only part of the 'pregnant.

Selon une autre particularité, les moyens réfrigérants permettent de refroidir entre la moitié et les ¾ de l'enceinte.According to another feature, the cooling means allow to cool between half and ¾ of the enclosure.

Selon une autre particularité, le mélangeur est formé d'un tube comportant au moins un élément mélangeur de type pale solidaire de sa périphérie, les moyens d'injection étant disposés sur cet élément.According to another feature, the mixer is formed of a tube comprising at least one blade-type mixing element integral with its periphery, the injection means being arranged on this element.

Selon une autre particularité, le tube est relié à un générateur de vapeur surchauffée, la vapeur produite par le générateur circulant dans le tube pour arriver jusqu'à l'élément mélangeur et ensuite être injectée par les moyens d'injections.According to another feature, the tube is connected to a superheated steam generator, the steam produced by the generator circulating in the tube to reach the mixing element and then be injected by the injection means.

Selon une autre particularité, les moyens d'injection sont formés par des ouvertures formées sur l'élément mélangeur.According to another feature, the injection means are formed by openings formed on the mixing element.

Selon une autre particularité, toutes les ouvertures de l'enceinte sont obturables avec des moyens d'obturation assurant les conditions d'étanchéité à la pression et aux micro-ondes.According to another particularity, all the openings of the enclosure are closable with closure means ensuring the conditions of tightness to pressure and microwaves.

Selon une autre particularité, l'enceinte comporte des moyens réfrigérants permettant de refroidir une partie de sa surface interne pour favoriser la condensation de l'eau évaporée par le traitement de séchage.According to another feature, the enclosure comprises cooling means for cooling a portion of its inner surface to promote the condensation of water evaporated by the drying treatment.

Selon une autre particularité, le dispositif comporte au moins une extrémité obturable par une porte automatique assurant les conditions d'étanchéité à la pression et aux micro-ondes.According to another feature, the device comprises at least one end closable by an automatic door ensuring the conditions of tightness to pressure and microwaves.

Selon une autre particularité, le générateur de micro-ondes communique avec l'enceinte de séchage à travers un coupleur/adaptateur de micro-ondes.In another feature, the microwave generator communicates with the drying chamber through a coupler / microwave adapter.

Selon une autre particularité, l'enceinte comporte une soupape de sécurité.According to another feature, the enclosure comprises a safety valve.

Selon une autre particularité, la cuve est éloignée des parois de l'enceinte par des supports perforés pour permettre le ruissèlement de l'eau condenséeAccording to another feature, the tank is removed from the walls of the enclosure by perforated supports to allow the streaming of the condensed water

D'autres particularités et avantages de la présente invention apparaîtront plus clairement à la lecture de la description ci-après faite en référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue en coupe longitudinale d'un mode de réalisation du dispositif selon l'invention ;
  • la figure 2 représente une vue en coupe longitudinale d'un autre mode de réalisation du dispositif selon l'invention.
  • la figure 3 représente une vue en coupe transversale du mode de réalisation représenté sur la figure 2.
Other features and advantages of the present invention will appear more clearly on reading the following description made with reference to the accompanying drawings in which:
  • Figure 1 shows a longitudinal sectional view of an embodiment of the device according to the invention;
  • Figure 2 shows a longitudinal sectional view of another embodiment of the device according to the invention.
  • FIG. 3 represents a cross-sectional view of the embodiment shown in FIG. 2.

Comme représenté sur les figures 1, 2 et 3, le dispositif est constitué d'une enceinte (1), de préférence, cylindrique et de forme allongée en matériau métallique avec une double paroi assurant d'une part, à la fois une bonne isolation thermique et l'étanchéité à la pression de la vapeur et d'autre part, l'étanchéité aux ondes. Cette enceinte (1) comporte au moins une extrémité ouverte sur l'extérieur et obturable par une porte (10) ou un couvercle (10). Dans un mode préféré de réalisation de l'invention, l'enceinte (1) comporte une extrémité obturable. La porte (10) permettant d'obturer les ouvertures étant réalisée de façon à ce que l'enceinte (1) soit totalement hermétique à l'air, à la pression de vapeur et aux ondes telles que les micro-ondes, lorsque la porte (10) est refermée. La porte (10) comporte donc un joint (102) en « Téflon » ou silicone pour l'étanchéité à la pression et en métal (101) pour l'étanchéité aux micro-ondes. Dans le mode de réalisation représenté sur la figure 2 la porte (10) peut coulisser grâce à un système de déplacement (152) comportant des roues (151) relié à la porte. Ce système permet ainsi à la porte d'être déplacée axialement par rapport à l'enceinte (1). Dans ce mode de réalisation la boue est chargée par l'ouverture formée lorsque la porte est ouverte.As represented in FIGS. 1, 2 and 3, the device consists of an enclosure (1), preferably cylindrical and of elongate shape made of metallic material with a double wall ensuring on the one hand, both a good insulation thermal and pressure tightness of the vapor and secondly, the tightness to the waves. This enclosure (1) has at least one end open on the outside and closable by a door (10) or a cover (10). In a preferred embodiment of the invention, the enclosure (1) has a closable end. The door (10) for closing the openings is made so that the enclosure (1) is completely airtight, at the vapor pressure and waves such as microwaves, when the door (10) is closed again. The door (10) therefore comprises a seal (102) made of "Teflon" or silicone for pressure-tightness and metal (101) for microwave-tightness. In the embodiment shown in Figure 2 the door (10) can slide through a displacement system (152) having wheels (151) connected to the door. This system thus allows the door to be moved axially relative to the enclosure (1). In this embodiment the sludge is loaded by the opening formed when the door is open.

L'enceinte (1) est en générale posée sur le sol, et est maintenue en place par des pieds (15), la partie reposant sur le sol formant la partie basse de l'enceinte (1).The enclosure (1) is generally placed on the ground, and is held in place by feet (15), the portion resting on the ground forming the lower part of the enclosure (1).

L'enceinte (1) comporte à l'intérieur, une paroi supplémentaire dans sa partie basse formant une cuve (7) sphérique dans laquelle va être chargée la boue (5) à sécher. Cette cuve (7) comporte des rebords (71) supérieurs fixés à l'enceinte (1) et sur lesquels sont formés des petites ouvertures. Ces ouvertures permettent l'évacuation vers le fond de l'enceinte (1) des eaux condensées sur la paroi interne de l'enceinte (1).The enclosure (1) has inside, an additional wall in its lower part forming a spherical tank (7) in which will be loaded the sludge (5) to be dried. This tank (7) has upper flanges (71) fixed to the enclosure (1) and on which small openings are formed. These openings allow evacuation to the bottom of the chamber (1) condensed water on the inner wall of the enclosure (1).

Dans le mode de réalisation représenté sur la figure 1, la matière (5) à sécher est chargée dans l'enceinte (1) par une arrivée de matière (8). Cette arrivée (8) est disposée sur une face de l'enceinte (1) à mi-hauteur de celle-ci.In the embodiment shown in Figure 1, the material (5) to be dried is loaded into the enclosure (1) by a material inlet (8). This inlet (8) is disposed on a face of the enclosure (1) at mid-height thereof.

Dans le mode de réalisation représenté sur la figure 2, le chargement de la matière (5) à sécher se fait grâce à la cuve qui étant disposée sur un chariot (152) roulant (151) peut être déplacée latéralement, le déchargement se faisant par retournement de la cuve.In the embodiment shown in FIG. 2, the loading of the material (5) to be dried is done by means of the bowl which is arranged on a trolley (152) which can be moved (151) and can be moved laterally, the unloading being carried out by flipping the tank.

Les boues (5) concernées par l'invention sont des boues du type boues d'épuration, lisier, déchets de fosses septiques...etc.The sludge (5) concerned by the invention are sludge type sludge, slurry, waste septic tanks ... etc.

L'enceinte (1) comporte également au moins une ouverture (2) arrondie ou rectangulaire constituant une fenêtre (2). Dans un mode de réalisation de l'invention, l'enceinte (1) comporte plusieurs fenêtres (2). Ces fenêtres (2) sont constituées en matériau étanche à la vapeur mais laissant passer les rayonnements de micro-ondes. Dans un mode de réalisation les fenêtres (2) sont en quartz. Dans un autre mode de réalisation les fenêtres (2) sont en « Téflon », ou tout autre matériau permettant les rayonnements électromagnétiques et l'étanchéité à la vapeur. Ces fenêtres (2) sous pression permettent d'émettre les ondes (23) vers l'intérieur de l'enceinte (1) et sont dites fenêtres (2) émettrices. Elles permettent ainsi de laisser passer les ondes (23) qui vont irradier ensuite la boue (5) à sécher. Les ondes (23) sont amenées par un guide d'onde (24) à au moins une fenêtre (2). Le guide d'onde (24) communique à travers un coupleur/adaptateur d'impédance (21) et le générateur de micro-ondes (22). Le générateur (22) d'ondes (23) permet ainsi d'irradier la boue (5) à sécher. Les fenêtres (2) sont disposées dans la partie haute de l'enceinte (1) c'est à dire la partie opposée à celle qui repose sur le sol.The enclosure (1) also comprises at least one rounded or rectangular aperture (2) constituting a window (2). In one embodiment of the invention, the enclosure (1) comprises a plurality of windows (2). These windows (2) are made of vapor-tight material but passing microwave radiation. In one embodiment, the windows (2) are made of quartz. In another embodiment the windows (2) are "Teflon", or any other material allowing electromagnetic radiation and vapor tightness. These windows (2) under pressure can emit the waves (23) to the inside of the enclosure (1) and are said windows (2) emitter. They thus allow to pass the waves (23) which will then irradiate the sludge (5) to dry. The waves (23) are brought by a waveguide (24) to at least one window (2). The waveguide (24) communicates through an impedance coupler / adapter (21) and the microwave generator (22). The wave generator (22) (23) thus makes it possible to irradiate the sludge (5) to be dried. The windows (2) are arranged in the upper part of the enclosure (1) that is to say the part opposite to that which rests on the ground.

Dans un premier mode de réalisation représenté sur la figure 1, l'enceinte (1) est verticale, dans ce cas elle est plus haute que large. Dans ce mode de réalisation l'enceinte (1) comporte une ouverture à l'extrémité opposée à celle reposant sur le sol. Les fenêtres (2) sont alors disposées sur la partie haute dessous l'ouverture et donc au dessous du couvercle (10). Dans ce cas les ondes sont, à la sortie des fenêtres, perpendiculaires par rapport au fond de la cuve et sont ensuite redirigées de façon à arriver verticalement dans la matière (5) à sécher.In a first embodiment shown in Figure 1, the enclosure (1) is vertical, in this case it is higher than wide. In this embodiment the enclosure (1) has an opening at the end opposite to that resting on the ground. The windows (2) are then arranged on the upper part below the opening and therefore below the lid (10). In this case the waves are, at the exit of the windows, perpendicular to the bottom of the tank and are then redirected to arrive vertically in the material (5) to dry.

Dans un autre mode de réalisation les fenêtres (2) sont disposées sur le couvercle (10) et permettent ainsi un rayonnement direct qui arrive verticalement dans la matière (5) à sécher.In another embodiment the windows (2) are arranged on the cover (10) and thus allow a direct radiation which arrives vertically in the material (5) to be dried.

Dans un deuxième mode de réalisation représenté sur la figure 2, la cuve est disposée horizontalement, elle est alors plus large que haute. Dans ce cas l'ouverture qui est toujours à une extrémité va se retrouver disposée sur le coté opposé à l'alimentation. Les fenêtres (2) sont alors disposées toujours dans la partie haute de l'enceinte (1) c'est à dire dans la partie opposée à celle reposant sur le sol.In a second embodiment shown in Figure 2, the tank is arranged horizontally, it is then wider than high. In this case the opening which is always at one end will be disposed on the opposite side to the power supply. The windows (2) are then always arranged in the upper part of the enclosure (1) that is to say in the opposite part to that resting on the ground.

Quelque soit le mode de réalisation lorsque les fenêtres (2) sont rectangulaires elles sont disposées de façon a être inversées l'une par rapport à l'autre, c'est à dire qu'une fenêtre est disposée dans le sens de la longueur et celle à coté dans le sens de la hauteur etc. comme illustré sur la figure 2.Whatever the embodiment when the windows (2) are rectangular, they are arranged so as to be inverted relative to one another, ie a window is arranged in the direction of the length and the one next to the direction of the height etc. as illustrated in Figure 2.

L'enceinte (1) est en communication par au moins deux canalisations avec au moins deux systèmes générateurs de vapeur.The enclosure (1) is in communication with at least two pipes with at least two steam generator systems.

Un premier générateur (9) génère de la vapeur saturante. Cette vapeur est injectée dans toute l'enceinte (1) avant le chargement de la matière (5) à sécher.A first generator (9) generates saturating steam. This steam is injected into the entire enclosure (1) before loading the material (5) to be dried.

Un deuxième générateur (32) génère de la vapeur surchauffée. Cette vapeur surchauffée est directement injectée dans la matière (5) à sécher.A second generator (32) generates superheated steam. This superheated steam is directly injected into the material (5) to be dried.

A l'intérieur de l'enceinte (1) est disposé un mélangeur (3). Ce mélangeur (3) est formé d'un tube (31, 31') qui traverse l'enceinte (1). Ce tube (31, 31') est relié au générateur (32) de vapeur surchauffée. Le tube (31, 31') comporte au moins un élément (35, 35') mélangeur. Cet élément (35, 35') mélangeur dispose de moyens (33, 33') d'injection de la vapeur surchauffée. Les moyens d'injection (33, 33') sont formés par des ouvertures (33, 33') formées sur l'élément (35, 35') mélangeur. La vapeur produite par le générateur (32) circule dans le tube pour arriver jusqu'à l'élément (35, 35') mélangeur et est ensuite injectée par les moyens (33, 33') d'injection au coeur de la matière (5) à sécher.Inside the enclosure (1) is arranged a mixer (3). This mixer (3) is formed of a tube (31, 31 ') which passes through the enclosure (1). This tube (31, 31 ') is connected to the superheated steam generator (32). The tube (31, 31 ') comprises at minus one element (35, 35 ') mixer. This element (35, 35 ') mixer has means (33, 33') for injecting superheated steam. The injection means (33, 33 ') are formed by openings (33, 33') formed on the mixing element (35, 35 '). The steam produced by the generator (32) flows in the tube to reach the mixing element (35, 35 ') and is then injected by the injection means (33, 33') into the core of the material ( 5) to dry.

Dans le premier mode de réalisation l'élément (35) mélangeur est formé par des pales fixées à l'extrémité du tube (31) arrivant au fond de l'enceinte (1). Le mélangeur tourne grâce à un moteur (34) disposé à l'extérieur de l'enceinte (1). Les pales épousent la forme sphérique ou elliptique du fond de la cuve (7).In the first embodiment the mixing element (35) is formed by blades fixed to the end of the tube (31) arriving at the bottom of the enclosure (1). The mixer rotates thanks to a motor (34) disposed outside the enclosure (1). The blades follow the spherical or elliptical shape of the bottom of the tank (7).

Le tube est décalé par rapport à l'axe (A) de symétrie de la cuve, c'est à dire proche de la paroi éloignée de la source de micro-ondes.The tube is offset relative to the axis (A) of symmetry of the tank, that is to say close to the wall remote from the microwave source.

Dans le deuxième mode de réalisation l'élément (35') mélangeur est formé par des pales rectangulaires fixées sur la périphérie du tube (31') de préférence selon une géométrie hélicoïdale et décalées entre elles. Le tube tourne grâce à un moteur (34) et se comporte comme une vis sans fin.In the second embodiment the mixing element (35 ') is formed by rectangular blades fixed on the periphery of the tube (31') preferably in a helical geometry and offset from each other. The tube rotates with a motor (34) and behaves like a worm.

Dans les deux cas les pales sont fixées de façon à arriver le plus proche possible du fond de la cuve (7) pour mélanger un maximum de matière (5) à sécher. Le matériau utilisé pour les pales est un matériau résistant aux micro-ondes. Le matériau peut être par exemple du pyrex ou du « Téflon ».In both cases the blades are fixed so as to arrive as close as possible to the bottom of the tank (7) to mix a maximum of material (5) to dry. The material used for the blades is a microwave resistant material. The material may for example be pyrex or "Teflon".

Les pales sont fixées de façon à ne pas dépasser de la matière (5) à sécher avant séchage et la quantité de matière (5) est adaptée de façon à ce qu'en fin de séchage les pales ne dépassent pas trop pour éviter les problèmes dus aux chocs avec les micro-ondes.The blades are fixed so as not to exceed the material (5) to dry before drying and the amount of material (5) is adapted so that at the end of drying the blades do not exceed too much to avoid problems due to shocks with microwaves.

Le rôle des mélangeurs étant d'une part de mélanger la boue (5) pour avoir un séchage homogène et d'autre part d'accroitre la pénétration des micro-ondes dans la boue (5) et favoriser le séchage. En effet sans mélange de la boue, une croute sèche se forme rapidement à sa surface ce qui empêche les micro-ondes de pénétrer correctement, et empêche donc un séchage efficace et homogène.The role of the mixers is on the one hand to mix the sludge (5) to have a homogeneous drying and on the other hand to increase the penetration of microwaves in the sludge (5) and promote drying. Indeed without mixing the mud, a dry crust forms quickly on its surface which prevents the microwaves to penetrate properly, and thus prevents an effective drying and homogeneous.

Les eaux de condensation sont évacuées par une canalisation (4) contrôlée par une vanne (41) d'évacuation et disposée dans la partie basse de l'enceinte.The condensation water is discharged through a pipe (4) controlled by a valve (41) for evacuation and disposed in the lower part of the enclosure.

Cette vanne (41) d'évacuation permet de maintenir l'enceinte (1) à la pression désirée, d'évacuer de la pression si celle-ci est trop élevée et enfin de mettre l'enceinte (1) à l'atmosphère une fois le processus de séchage achevé.This evacuation valve (41) makes it possible to maintain the enclosure (1) at the desired pressure, to evacuate the pressure if it is too high and finally to put the enclosure (1) in the atmosphere a once the drying process is complete.

La partie supérieure de l'enceinte (1) comporte une soupape de sécurité (12) qui est réglée en fonction de la pression désirée et qui va servir uniquement en cas d'incident nécessitant de réguler la pression autrement qu'avec la vanne (41) d'évacuation. Cette soupape (12) ne sera donc, dans un fonctionnement normal du dispositif, jamais utilisée.The upper part of the enclosure (1) comprises a safety valve (12) which is regulated according to the desired pressure and which will be used only in the event of an incident requiring pressure regulation other than with the valve (41). ) evacuation. This valve (12) will therefore, in normal operation of the device, never used.

L'enceinte (1) comporte également des moyens réfrigérant (203) dans sa double paroi. Ces moyens réfrigérant (203) sont disposés de façon à permettre le refroidissement de la partie base de l'enceinte (1) et ainsi la condensation des eaux d'évaporation. Les moyens réfrigérant (203) sont par exemple des serpentins dans lesquels circule un gaz refroidissant.The enclosure (1) also comprises cooling means (203) in its double wall. These cooling means (203) are arranged to allow the cooling of the base portion of the chamber (1) and thus the condensation of the evaporation water. The cooling means (203) are for example coils in which circulates a cooling gas.

Ces moyens (203) de refroidissement délimitent une zone froide (200) et une zone chaude (300) dans l'enceinte. La séparation (202) entre les deux zones se situant environ entre la moitié et les ¾ de la partie basse de l'enceinte.These cooling means (203) define a cold zone (200) and a hot zone (300) in the enclosure. The separation (202) between the two zones being approximately between half and ¾ of the lower part of the enclosure.

L'enceinte (1) comporte dans sa partie basse une trappe (6) qui permet d'évacuer la matière séchée lorsque le cycle de séchage est terminé. Dans le mode de réalisation représenté sur la figure 1, cette trappe (6) comporte également un guide qui va permettre au mélangeur (3) d'être maintenu droit et ainsi éviter son balancement lors du mélange.The enclosure (1) has in its lower part a hatch (6) which allows to evacuate the dried material when the drying cycle is completed. In the embodiment shown in Figure 1, the hatch (6) also includes a guide that will allow the mixer (3) to be kept upright and thus prevent its swaying during mixing.

L'enceinte (1) comporte des moyens (11) de mesure de la température et de la pression afin de réguler ces paramètres au cours du séchage.The enclosure (1) comprises means (11) for measuring the temperature and the pressure in order to regulate these parameters during drying.

L'ensemble des ouvertures de l'enceinte (1) comporte un système de vanne (91, 81, 61, 41) permettant à l'enceinte (1) de rester hermétique et évitant aussi la fuite des micro-ondes.The set of openings of the enclosure (1) comprises a valve system (91, 81, 61, 41) allowing the enclosure (1) to remain hermetic and also avoiding the leakage of microwaves.

L'ensemble des pressions et des températures utilisées dans le cadre de l'invention étant calculé à partir notamment du diagramme de Mollier.The set of pressures and temperatures used in the context of the invention being calculated from, in particular, the Mollier diagram.

Le procédé de séchage mettant en oeuvre le dispositif précédemment décrit comporte les opérations suivantes :

  • mise sous pression de l'enceinte (1) par envoi de vapeur saturante dans l'enceinte (1) jusqu'à atteindre la pression correspondant à la température de fonctionnement souhaitée en vapeur saturante. On pourra choisir par exemple une pression de 1 bar pour une température de 100° Celsius de la vapeur saturante à 3 bars pour une température de 130° Celsius de la vapeur saturante.
  • introduction de la matière (5) à sécher qui se trouve sous forme de boue, à ce stade la boue (5) comporte entre 70 et 80% d'eau ;
  • envoi de la vapeur surchauffée par l'intermédiaire du tube (31, 31') et des éléments (35, 35') mélangeur au coeur de la boue (5) à sécher tout en mélangeant. Le mélange est très important car il permet de sécher uniformément. La vapeur surchauffée est injectée à une pression de 1 bar à 5 bars, et dans un mode de réalisation de 3 bars. Ce qui permet d'avoir une température de la boue (5) aux environs de 130°C. Cette étape permet d'effectuer un pré-séchage de la matière.
  • lorsque la température atteint 130°C envoi des micro-ondes pour accélérer le séchage de la matière. La longueur d'onde des micro-ondes se situe entre 400 et 2450 MHz.
The drying process using the device previously described comprises the following operations:
  • pressurizing the chamber (1) by sending saturating vapor into the chamber (1) until the pressure corresponding to the desired saturation vapor operating temperature is reached. For example, it is possible to choose a pressure of 1 bar for a temperature of 100 ° Celsius of the saturating vapor at 3 bars for a temperature of 130 ° Celsius of the saturating vapor.
  • introduction of the material (5) to be dried which is in the form of sludge, at this stage the sludge (5) comprises between 70 and 80% of water;
  • sending the superheated steam through the tube (31, 31 ') and the elements (35, 35') mixer in the heart of the sludge (5) to be dried while mixing. The mixture is very important because it allows to dry evenly. The superheated steam is injected at a pressure of 1 bar at 5 bar, and in an embodiment of 3 bar. This makes it possible to have a temperature of the sludge (5) at around 130 ° C. This step makes it possible to pre-dry the material.
  • when the temperature reaches 130 ° C sending microwaves to accelerate the drying of the material. The wavelength of the microwaves is between 400 and 2450 MHz.

Il y'a donc une différence de pression entre la partie haute de l'enceinte (1) et la partie basse de l'enceinte (1) ou se trouve la boue (5). Ce différentiel de pression va favoriser l'évacuation de l'eau vers l'extérieur de la boue (5). La puissance des générateurs à micro-ondes est calculée de façon à atteindre une température de boues (5) supérieure à celle de la vapeur saturante.There is therefore a pressure difference between the upper part of the chamber (1) and the lower part of the chamber (1) where the sludge (5) is located. This pressure differential will promote the evacuation of water to the outside of the sludge (5). The power of the microwave generators is calculated so as to reach a sludge temperature (5) higher than that of the saturating vapor.

Etant donné la présence d'une pression de vapeur saturante, l'humidité dégagée par la boue lors de son traitement va donc ruisseler sur les parois froides par gravité pour être récupérée en-dessous de la grille (71) par la vanne (41) d'évacuation. L'ouverture de la vanne (41) est déclenchée à intervalles réguliers par le système de contrôle dès que le niveau se rapproche de la grille. L'enceinte (1) comporte un dispositif détecteur de niveau permettant l'ouverture automatique de la vanne (41).Given the presence of saturation vapor pressure, the humidity released by the sludge during its treatment will therefore run off the cold walls by gravity to be recovered below the gate (71) by the valve (41) evacuation. The opening of the valve (41) is triggered at regular intervals by the control system as soon as the level approaches the grid. The enclosure (1) comprises a level detector device for the automatic opening of the valve (41).

Au bout d'un certain temps lorsque la boue est séchée, le générateur de micro-ondes est également arrêté et la pression diminuée pour arriver progressivement à la pression atmosphérique.After a while when the sludge is dried, the microwave generator is also stopped and the pressure decreased to gradually reach atmospheric pressure.

Par la mise en saturation du milieu ambiant autour de la boue (5) et l'utilisation judicieuse de puissance de micro-ondes avec des consommations d'énergie bien inférieures à celles généralement utilisées dans l'art antérieur, on arrive à accélérer le processus d'évacuation de l'humidité interne de la boue (5) et obtenir des séchages plus rapides avec une consommation d'énergie inférieure.By saturation of the ambient environment around the sludge (5) and the judicious use of microwave power with much lower energy consumption than those generally used in the prior art, it is possible to accelerate the process. evacuation of the internal moisture of the sludge (5) and obtain faster drying with lower energy consumption.

De plus le fait de travailler sous pression saturante, évite les phénomènes d'explosions en empêchant la présence d'oxygène.In addition, working under saturating pressure avoids the phenomena of explosions by preventing the presence of oxygen.

Il doit être évident pour l'homme du métier que la présente invention permet des modes de réalisation sous de nombreuses autres formes spécifiques sans l'éloigner du domaine d'application de l'invention comme revendiquée. Par conséquent, les présents modes de réalisation doivent être considérés à titre d'illustration, mais peuvent être modifiés dans le domaine défini par la portée des revendications jointes, et l'invention ne doit pas être limitée aux détails donnés ci-dessus.It should be apparent to those skilled in the art that the present invention permits embodiments in many other specific forms without departing from the scope of the invention as claimed. Therefore, the present embodiments should be considered by way of illustration, but may be modified within the scope defined by the scope of the appended claims, and the invention should not be limited to the details given above.

Claims (22)

Procédé de séchage de boue (5) telles que les boues dépuration, le lisier ou déchets de fosses septiques par irradiation par micro-ondes caractérisé en ce que le procédé de séchage de boues comporte : - une étape de mise en pression à une pression déterminée d'une enceinte (1) étanche au moins par injection de vapeur d'eau saturante et de maintien de cette pression pendant un temps déterminé ; - une étape de chargement des boues à l'intérieur d'une cuve éloignée des parois de l'enceinte (1) avec des moyens de chargement assurant le maintien en pression ; - une étape d'injection de vapeur surchauffée dans la boue (5) par l'intermédiaire d'un mélangeur (3) en action proche de la paroi de la cuve la plus éloignée par rapport à la source des micro-ondes comportant des moyens (33) d'injections ; - une étape de chauffage au coeur de la boue (5) par émission de micro-ondes dans des fréquences comprises entre 400 et 2450 MHz en direction de la cuve, cette étape étant réalisée en mélangeant la boue (5) ; - une étape d'évacuation des eaux recueillies par condensation et ruissellement sur les parois de l'enceinte vers le fond de l'enceinte (1) par l'intermédiaire d'une vanne (6) communiquant avec l'extérieur. Method of drying sludge (5) such as sludge, slurry or septic tank waste by microwave irradiation characterized in that the sludge drying process comprises: - A step of pressurizing at a predetermined pressure of a chamber (1) sealed at least by saturating water vapor injection and maintaining this pressure for a predetermined time; a step of loading the sludge inside a tank remote from the walls of the enclosure (1) with loading means ensuring the maintenance under pressure; a step of injecting superheated steam into the sludge (5) via a mixer (3) in action close to the wall of the vessel furthest away from the source of the microwaves comprising means (33) injections; - A heating step in the heart of the sludge (5) by microwave emission in frequencies between 400 and 2450 MHz towards the tank, this step being performed by mixing the sludge (5); - A step of evacuating water collected by condensation and runoff on the walls of the enclosure towards the bottom of the enclosure (1) via a valve (6) communicating with the outside. Procédé de séchage selon la revendication 1, caractérisé en ce que pendant toute la durée du séchage la boue (5) est mélangée avec le mélangeur (3) pour permettre une meilleure homogénéité du séchage, tout en favorisant considérablement la pénétration des micro-ondes dans la matière.Drying method according to claim 1, characterized in that throughout the drying time the sludge (5) is mixed with the mixer (3) to allow a better homogeneity of the drying, while considerably promoting the penetration of microwaves in the matter. Procédé de séchage selon une des revendications 1 à 2, caractérisé en ce que la pression de vapeur d'eau saturante est comprise dans une plage entre 1 bar et 3 bars.Drying process according to one of Claims 1 to 2, characterized in that the saturation vapor pressure is in a range between 1 bar and 3 bars. Procédé de séchage selon une des revendications 1 à 2, caractérisé en ce que la pression de vapeur d'eau saturante est de 1 bar.Drying process according to one of Claims 1 to 2, characterized in that the saturation water vapor pressure is 1 bar. Procédé de séchage selon une des revendications 1 à 4, caractérisé en ce que la pression de vapeur surchauffée est comprise entre 1 bar et 5 bars.Drying method according to one of claims 1 to 4, characterized in that the superheated steam pressure is between 1 bar and 5 bar. Procédé de séchage selon la revendication 5, caractérisé en ce que la pression de vapeur surchauffée est de 3 bars.Drying process according to claim 5, characterized in that the superheated steam pressure is 3 bar. Procédé de séchage selon une des revendications 1 à 6, caractérisé en ce que la température de l'enceinte doit être inférieure à la température de la boue (5) pour permettre une évaporation.Drying method according to one of claims 1 to 6, characterized in that the temperature of the chamber must be lower than the temperature of the sludge (5) to allow evaporation. Procédé de séchage selon une des revendications 1 à 7, caractérisé en ce que l'irradiation par les micro-ondes est effectuée lorsque la température de la boue (5) est comprise entre 110°C et 140°C.Drying process according to one of Claims 1 to 7, characterized in that the microwave irradiation is carried out when the temperature of the sludge (5) is between 110 ° C and 140 ° C. Procédé de séchage selon une des revendications 1 à 8, caractérisé en ce que l'irradiation par les micro-ondes est effectuée lorsque la température de la boue (5) est de 130°C.Drying method according to one of Claims 1 to 8, characterized in that the microwave irradiation is carried out when the temperature of the sludge (5) is 130 ° C. Dispositif permettant la mise en oeuvre du procédé selon les revendications 1 à 9 caractérisé en ce qu'il est constitué d'une enceinte (1), comportant une cuve étanche, résistante à la pression et communiquant par au moins une fenêtre (2) en quartz ou toute autre matière convenant aux micro-ondes avec au moins un générateur (22) de micro-ondes, l'enceinte (1) communiquant avec un générateur (32) de vapeur saturante et une arrivée (8) de boue (5) à sécher, un mélangeur (3) comportant des moyens (33) d'injection de vapeur surchauffée disposé dans l'enceinte, une trappe (6) de déchargement des boues séchées.Device for carrying out the process according to Claims 1 to 9, characterized in that it consists of an enclosure (1) comprising a sealed, pressure-resistant tank communicating with at least one window (2). quartz or any other material suitable for microwaves with at least one microwave generator (22), the enclosure (1) communicating with a saturating steam generator (32) and a sludge inlet (8) (5) to dry, a mixer (3) having means (33) for injecting superheated steam disposed in the enclosure, a hatch (6) for discharging the dried sludge. Dispositif selon la revendication 10, caractérisé en ce qu'il comporte dans sa partie la plus basse orientée vers le sol un orifice (4) permettant d'évacuer par gravité des eaux de ruissellement contrôlé par une vanne (41) d'évacuation ou de réguler la pression interne de l'enceinte.Device according to claim 10, characterized in that it comprises in its lowest part facing towards the ground an orifice (4) allowing to evacuate by gravity runoff controlled by a valve (41) discharge or regulate the internal pressure of the enclosure. Dispositif selon une des revendications 10 à 11, caractérisé en ce que l'enceinte (1) comporte des moyens (203) réfrigérants disposés dans sa partie la plus basse de façon à refroidir sa paroi interne en contact avec l'atmosphère sous pression, les moyens étant disposés de façon à ne refroidir qu'une partie de l'enceinte.Device according to one of claims 10 to 11, characterized in that the enclosure (1) comprises cooling means (203) arranged in its lowest part so as to cool its internal wall in contact with the atmosphere under pressure, the means being arranged so as to cool only part of the enclosure. Dispositif selon une des revendications 10 à 12, caractérisé en ce que les moyens (203) réfrigérants permettent de refroidir entre la moitié et les ¾ de l'enceinte.Device according to one of claims 10 to 12, characterized in that the means (203) coolers can cool between half and ¾ of the enclosure. Dispositif selon une des revendications 10 à 13, caractérisé en ce que le mélangeur (3) est formé d'un tube (31) comportant au moins un élément (35) mélangeur de type pale solidaire de sa périphérie, les moyens (33) d'injection étant disposés sur cet élément.Device according to one of claims 10 to 13, characterized in that the mixer (3) is formed of a tube (31) comprising at least one blade-type mixing element (35) integral with its periphery, the means (33) of which injection being arranged on this element. Dispositif selon une des revendications 10 à 14, caractérisé en ce que le tube (31) est relié à un générateur (32) de vapeur surchauffée, la vapeur produite par le générateur circulant dans le tube (31) pour arriver jusqu'à l'élément (35) mélangeur et ensuite être injectée par les moyens (33) d'injections.Device according to one of claims 10 to 14, characterized in that the tube (31) is connected to a generator (32) of superheated steam, the steam produced by the generator circulating in the tube (31) to reach the mixing element (35) and then being injected by means (33) of injections. Dispositif selon une des revendications 10 à 15, caractérisé en ce que les moyens (33) d'injection sont formés par des ouvertures formées sur l'élément (35) mélangeur.Device according to one of Claims 10 to 15, characterized in that the injection means (33) are formed by openings formed on the mixing element (35). Dispositif selon une des revendications 10 à 16 caractérisé en ce que toutes les ouvertures de l'enceinte (1) sont obturables avec des moyens d'obturation assurant les conditions d'étanchéité à la pression et aux micro-ondes.Device according to one of claims 10 to 16 characterized in that all the openings of the enclosure (1) are closable with closure means ensuring the conditions of tightness to pressure and microwaves. Dispositif selon une des revendications 10 à 17, caractérisé en ce que l'enceinte (1) comporte des moyens (203) réfrigérants permettant de refroidir une partie de sa surface interne pour favoriser la condensation de l'eau évaporer par le traitement de séchage.Device according to one of Claims 10 to 17, characterized in that that the enclosure (1) comprises means (203) refrigerant for cooling a portion of its inner surface to promote the condensation of water evaporate by the drying treatment. Dispositif selon une des revendications 10 à 18, caractérisé en ce qu'il comporte au moins une extrémité obturable par une porte (10) automatique assurant les conditions d'étanchéité à la pression et aux micro-ondes.Device according to one of claims 10 to 18, characterized in that it comprises at least one end closable by an automatic door (10) ensuring the conditions of tightness to pressure and microwaves. Dispositif selon une des revendications 10 à 19, caractérisé en ce que le générateur (22) de micro-ondes communique avec l'enceinte (1) de séchage à travers un coupleur/adaptateur (21) de micro-ondes.Device according to one of claims 10 to 19, characterized in that the microwave generator (22) communicates with the drying chamber (1) through a microwave coupler / adapter (21). Dispositif selon les revendications 10 à 20, caractérisé en ce que l'enceinte (1) comporte une soupape (12) de sécurité.Device according to claims 10 to 20, characterized in that the enclosure (1) comprises a safety valve (12). Dispositif selon les revendications 10 à 21, caractérisé en ce que la cuve est éloignée des parois de l'enceinte par des supports perforés pour permettre le ruissèlement de l'eau condensée.Device according to claims 10 to 21, characterized in that the tank is removed from the walls of the enclosure by perforated supports to allow the streaming of the condensed water.
EP07290491A 2006-04-21 2007-04-20 Method of drying sludge and apparatus for carrying out the method Active EP1847791B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07290491T PL1847791T3 (en) 2006-04-21 2007-04-20 Method of drying sludge and apparatus for carrying out the method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0603551A FR2900224B1 (en) 2006-04-21 2006-04-21 METHOD FOR DRYING SLUDGE AND DEVICE FOR IMPLEMENTING THE METHOD

Publications (2)

Publication Number Publication Date
EP1847791A1 true EP1847791A1 (en) 2007-10-24
EP1847791B1 EP1847791B1 (en) 2011-09-07

Family

ID=37487735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07290491A Active EP1847791B1 (en) 2006-04-21 2007-04-20 Method of drying sludge and apparatus for carrying out the method

Country Status (21)

Country Link
US (1) US20090229140A1 (en)
EP (1) EP1847791B1 (en)
JP (1) JP4875146B2 (en)
KR (1) KR101394623B1 (en)
CN (1) CN101454630B (en)
AT (1) ATE523746T1 (en)
AU (1) AU2007242682B2 (en)
CA (1) CA2650025C (en)
DK (1) DK1847791T3 (en)
ES (1) ES2372313T3 (en)
FR (1) FR2900224B1 (en)
MA (1) MA30417B1 (en)
MX (1) MX2008013504A (en)
NO (1) NO20084754L (en)
NZ (1) NZ572340A (en)
PL (1) PL1847791T3 (en)
PT (1) PT1847791E (en)
RU (1) RU2419049C2 (en)
UA (1) UA94747C2 (en)
WO (1) WO2007122328A1 (en)
ZA (1) ZA200809360B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023198948A1 (en) * 2022-04-11 2023-10-19 Agrolinera Astur, S.L. Airtight storage tank and improved method for anaerobic treatment of slurry or whey
ES2954372A1 (en) * 2022-04-11 2023-11-21 Agrolinera Astur S L Improved anaerobic slurry treatment process (Machine-translation by Google Translate, not legally binding)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE527166C2 (en) * 2003-08-21 2006-01-10 Kerttu Eriksson Method and apparatus for dehumidification
CN101726164B (en) * 2009-11-19 2011-10-19 苗振东 Dynamic reflection type microwave heating drying sterilization equipment
CN111380331A (en) * 2018-12-29 2020-07-07 中国科学院微电子研究所 Microwave drying device

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52140964A (en) * 1976-05-20 1977-11-24 Matsushita Electric Ind Co Ltd Apparatus for drying sludge
FR2359633A1 (en) * 1976-07-29 1978-02-24 Atomic Energy Authority Uk PROCESS AND APPARATUS FOR TRANSFORMATION OF FLUID MATERIALS IN THE SOLID STATE
US4882851A (en) * 1987-04-13 1989-11-28 The Fitzpatrick Co. Apparatus and method for batch drying using a microwave vacuum system
JPH0240281A (en) * 1988-07-29 1990-02-09 Hikoma Seisakusho Kk Apparatus for drying raw sewage
FR2647103A1 (en) * 1989-05-22 1990-11-23 Lataillade Maurice Device for reducing, by drying and sterilisation, the volume of waste sludges from sewage stations by means of microwaves, and electromechanical transfer system
WO1990015515A1 (en) * 1989-06-07 1990-12-13 Wolfgang Moshammer Process and device for irradiating material containing or mixed with water with microwave energy
EP0408946A2 (en) * 1989-07-19 1991-01-23 Kurt Satow Method and apparatus for sterilising, disinfecting and/or drying
EP0505586A1 (en) * 1991-03-23 1992-09-30 Reinhard Dipl.-Ing. Brunner Apparatus for drying wood
EP0599259A1 (en) * 1992-11-25 1994-06-01 Matsushita Electric Industrial Co., Ltd. Drying apparatus
EP0606810A1 (en) * 1993-01-14 1994-07-20 Comessa S.A. Drying device
EP0619149A1 (en) * 1993-04-09 1994-10-12 Matsushita Electric Industrial Co., Ltd. Refuse processing machine
WO2000052405A1 (en) * 1999-03-01 2000-09-08 Milproc Miljöprocesser Ab A method and a plant for hygienizing and drying organic waste
EP1066837A1 (en) * 1999-07-07 2001-01-10 Helmut Dr. Katschnig Microwave sterilisation device
EP1156292A2 (en) * 2000-05-17 2001-11-21 Dolittle AB Device for treatment of biological waste
EP1224946A1 (en) * 2001-01-18 2002-07-24 Linn High Term GmbH Apparatus for treatment of bulk material, particularly cork granulates
EP1248059A1 (en) * 1997-10-30 2002-10-09 Valeurs Bois Industrie Method for drying sawn timber and device for implementing said method
WO2004113812A1 (en) * 2003-06-20 2004-12-29 Amut S.P.A. Device and method for heating, drying and/or crystallizing plastic materials

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5520614A (en) * 1978-07-31 1980-02-14 Kagaku Gijutsucho Hoshasen Igaku Sogo Kenkyusho Dehydrator
JPS5936188B2 (en) * 1979-03-06 1984-09-01 山陽自動車興業株式会社 How to dry dehydrated sludge cake
SE8405982L (en) * 1984-11-27 1986-05-28 Hans Theliander WAY TO DRY PARTICULAR MATERIAL
JPH0252981A (en) * 1988-08-12 1990-02-22 Toshiba Corp Microwave drying device for granular body
US5335425A (en) * 1991-08-14 1994-08-09 Matsushita Electric Industrial Co., Ltd. Dry-processing apparatus for heating and drying objects to be processed
US5954970A (en) * 1995-01-11 1999-09-21 Haden Schweitzer Corporation Process for treating sludge using low-level heat
DE19710711A1 (en) * 1995-09-22 1998-09-17 Dieffenbacher Gmbh Maschf Lignite dewatering under mechanical pressure, aided by superheated steam
US6675495B2 (en) * 1997-10-30 2004-01-13 Valeurs Bois Industrie Method for drying saw timber and device for implementing said method

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52140964A (en) * 1976-05-20 1977-11-24 Matsushita Electric Ind Co Ltd Apparatus for drying sludge
FR2359633A1 (en) * 1976-07-29 1978-02-24 Atomic Energy Authority Uk PROCESS AND APPARATUS FOR TRANSFORMATION OF FLUID MATERIALS IN THE SOLID STATE
US4882851A (en) * 1987-04-13 1989-11-28 The Fitzpatrick Co. Apparatus and method for batch drying using a microwave vacuum system
JPH0240281A (en) * 1988-07-29 1990-02-09 Hikoma Seisakusho Kk Apparatus for drying raw sewage
FR2647103A1 (en) * 1989-05-22 1990-11-23 Lataillade Maurice Device for reducing, by drying and sterilisation, the volume of waste sludges from sewage stations by means of microwaves, and electromechanical transfer system
WO1990015515A1 (en) * 1989-06-07 1990-12-13 Wolfgang Moshammer Process and device for irradiating material containing or mixed with water with microwave energy
EP0408946A2 (en) * 1989-07-19 1991-01-23 Kurt Satow Method and apparatus for sterilising, disinfecting and/or drying
EP0505586A1 (en) * 1991-03-23 1992-09-30 Reinhard Dipl.-Ing. Brunner Apparatus for drying wood
EP0599259A1 (en) * 1992-11-25 1994-06-01 Matsushita Electric Industrial Co., Ltd. Drying apparatus
EP0606810A1 (en) * 1993-01-14 1994-07-20 Comessa S.A. Drying device
EP0619149A1 (en) * 1993-04-09 1994-10-12 Matsushita Electric Industrial Co., Ltd. Refuse processing machine
EP1248059A1 (en) * 1997-10-30 2002-10-09 Valeurs Bois Industrie Method for drying sawn timber and device for implementing said method
WO2000052405A1 (en) * 1999-03-01 2000-09-08 Milproc Miljöprocesser Ab A method and a plant for hygienizing and drying organic waste
EP1066837A1 (en) * 1999-07-07 2001-01-10 Helmut Dr. Katschnig Microwave sterilisation device
EP1156292A2 (en) * 2000-05-17 2001-11-21 Dolittle AB Device for treatment of biological waste
EP1224946A1 (en) * 2001-01-18 2002-07-24 Linn High Term GmbH Apparatus for treatment of bulk material, particularly cork granulates
WO2004113812A1 (en) * 2003-06-20 2004-12-29 Amut S.P.A. Device and method for heating, drying and/or crystallizing plastic materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023198948A1 (en) * 2022-04-11 2023-10-19 Agrolinera Astur, S.L. Airtight storage tank and improved method for anaerobic treatment of slurry or whey
ES2954372A1 (en) * 2022-04-11 2023-11-21 Agrolinera Astur S L Improved anaerobic slurry treatment process (Machine-translation by Google Translate, not legally binding)

Also Published As

Publication number Publication date
ZA200809360B (en) 2009-07-29
EP1847791B1 (en) 2011-09-07
NO20084754L (en) 2008-12-12
KR20090007458A (en) 2009-01-16
NZ572340A (en) 2011-07-29
JP2009534623A (en) 2009-09-24
PT1847791E (en) 2011-11-28
FR2900224A1 (en) 2007-10-26
ES2372313T3 (en) 2012-01-18
JP4875146B2 (en) 2012-02-15
RU2419049C2 (en) 2011-05-20
WO2007122328A1 (en) 2007-11-01
AU2007242682B2 (en) 2011-12-22
CN101454630B (en) 2012-12-26
RU2008142146A (en) 2010-05-27
CA2650025C (en) 2015-06-23
FR2900224B1 (en) 2008-07-04
MA30417B1 (en) 2009-05-04
AU2007242682A1 (en) 2007-11-01
CA2650025A1 (en) 2007-11-01
UA94747C2 (en) 2011-06-10
DK1847791T3 (en) 2012-01-09
MX2008013504A (en) 2009-02-23
KR101394623B1 (en) 2014-05-13
PL1847791T3 (en) 2012-03-30
US20090229140A1 (en) 2009-09-17
WO2007122328A8 (en) 2008-12-18
ATE523746T1 (en) 2011-09-15
CN101454630A (en) 2009-06-10

Similar Documents

Publication Publication Date Title
EP1027567B1 (en) Method for drying saw timber and device for implementing said method
EP1847791B1 (en) Method of drying sludge and apparatus for carrying out the method
EP0496684B1 (en) Apparatus for the simultaneous wet processing of a plurality of samples, and use of the apparatus
EP2991934B1 (en) Method for ultra dewatering viscous or pasty biomass forming products and installation for carrying out the method
CA1331280C (en) Furnace for dehydrating pulverulent or granular materials
FR2924300A1 (en) DEVICE FOR THERMALLY TREATING DIVIDED SOLIDS.
FR2931162A1 (en) CARBONIZATION METHOD AND DEVICE
FR2892888A1 (en) Divided solid/product e.g. meat, heat treating e.g. browning, device, has radiant heating parts emitting radiation in direction of free surface of divided solid mass spread in envelope while being simultaneously mixed/heated by helical part
WO2004068907A1 (en) Microwave radiation heating device and method of implementing same
EP1133666A1 (en) Device for high temperature heat treatment of ligneous material
WO2004068906A1 (en) Method and system for heating granules by microwave radiation
FR2857291A1 (en) Thermal processing method for wood, involves recovering mixture containing heat transfer fluid and gas produced from heating of wood through outlet opening and extracting resin part and water vapor contained in gas
FR2799397A1 (en) Process for obtaining flour from animal or vegetable waste has an isothermal reactor operating under a vacuum
FR3030559A1 (en) DEVICE FOR TREATING GAS / SOLID BY A SCREW REACTOR COMPRISING A BRUSH REPORTED ON THE SCREW
WO1989009917A1 (en) Industrial microwave oven with radiant slits for continuous treatment of the charge
WO2019211526A1 (en) Magnetic filter for optimum stoichiometry
FR2702931A1 (en) Installation for drying fruits such as walnuts, almonds, chesnuts and the like
WO2002021939A1 (en) Method for treating ligneous products designed to produce flavouring substances

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

AKX Designation fees paid
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SARL INNOPARTS

Owner name: BARBOSA, ARTHUR

Owner name: BEARN INNOVATION

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

17P Request for examination filed

Effective date: 20080416

RAX Requested extension states of the european patent have changed

Extension state: AL

Payment date: 20080416

Extension state: HR

Payment date: 20080416

Extension state: RS

Payment date: 20080416

Extension state: MK

Payment date: 20080416

Extension state: BA

Payment date: 20080416

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RTI1 Title (correction)

Free format text: METHOD OF DRYING SLUDGE AND APPARATUS FOR CARRYING OUT THE METHOD

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602007016941

Country of ref document: DE

Effective date: 20111103

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20111110

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: R. A. EGLI & CO. PATENTANWAELTE

REG Reference to a national code

Ref country code: RO

Ref legal event code: EPE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2372313

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20120118

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110907

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20110907

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110907

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110907

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110907

REG Reference to a national code

Ref country code: GR

Ref legal event code: EP

Ref document number: 20110402921

Country of ref document: GR

Effective date: 20120206

REG Reference to a national code

Ref country code: PL

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110907

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110907

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

REG Reference to a national code

Ref country code: HU

Ref legal event code: AG4A

Ref document number: E013304

Country of ref document: HU

26N No opposition filed

Effective date: 20120611

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602007016941

Country of ref document: DE

Effective date: 20120611

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20130419

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110907

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20130430

Year of fee payment: 7

Ref country code: FI

Payment date: 20130426

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140420

REG Reference to a national code

Ref country code: GR

Ref legal event code: ML

Ref document number: 20110402921

Country of ref document: GR

Effective date: 20141104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140420

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160430

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160430

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: BE

Effective date: 20161022

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: INNOTHERM-E TECHNOLOGIES, FR

Free format text: FORMER OWNER: BEARN INNOVATION, FR

Ref country code: CH

Ref legal event code: PUEA

Owner name: BEARN INNOVATION, FR

Free format text: FORMER OWNER: BEARN INNOVATION, FR

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20190411

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200420

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201020

Ref country code: RO

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200420

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20210421

Year of fee payment: 15

Ref country code: MC

Payment date: 20210422

Year of fee payment: 15

Ref country code: DE

Payment date: 20210428

Year of fee payment: 15

Ref country code: FR

Payment date: 20210423

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20210427

Year of fee payment: 15

Ref country code: DK

Payment date: 20210428

Year of fee payment: 15

Ref country code: CH

Payment date: 20210505

Year of fee payment: 15

Ref country code: BG

Payment date: 20210427

Year of fee payment: 15

Ref country code: ES

Payment date: 20210504

Year of fee payment: 15

Ref country code: HU

Payment date: 20210426

Year of fee payment: 15

Ref country code: PL

Payment date: 20210420

Year of fee payment: 15

Ref country code: IE

Payment date: 20210427

Year of fee payment: 15

Ref country code: SE

Payment date: 20210428

Year of fee payment: 15

Ref country code: BE

Payment date: 20210427

Year of fee payment: 15

Ref country code: AT

Payment date: 20210421

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20210426

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200420

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602007016941

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20220430

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20220501

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 523746

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220420

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20220420

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20220430

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: 20220421

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220501

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220502

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220430

Ref country code: HU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220421

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220420

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220430

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20221103

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220430

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220430

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: 20220420

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220430

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20230530

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220420

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220420

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220421