WO2005019751A1 - Method for drying manure slurry and a slurry dryer - Google Patents

Method for drying manure slurry and a slurry dryer Download PDF

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Publication number
WO2005019751A1
WO2005019751A1 PCT/FR2003/002345 FR0302345W WO2005019751A1 WO 2005019751 A1 WO2005019751 A1 WO 2005019751A1 FR 0302345 W FR0302345 W FR 0302345W WO 2005019751 A1 WO2005019751 A1 WO 2005019751A1
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WO
WIPO (PCT)
Prior art keywords
slurry
layer
dryer
drying
movement
Prior art date
Application number
PCT/FR2003/002345
Other languages
French (fr)
Inventor
Raymond Chardine
Original Assignee
Euromatic Systeme S.A.R.L.
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 Euromatic Systeme S.A.R.L. filed Critical Euromatic Systeme S.A.R.L.
Priority to PCT/FR2003/002345 priority Critical patent/WO2005019751A1/en
Priority to AU2003304439A priority patent/AU2003304439A1/en
Publication of WO2005019751A1 publication Critical patent/WO2005019751A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/04—Agitating, stirring, or scraping devices
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C3/00—Treating manure; Manuring
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F3/00—Fertilisers from human or animal excrements, e.g. manure
    • C05F3/06—Apparatus for the manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/10—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in the open air; in pans or tables in rooms; Drying stacks of loose material on floors which may be covered, e.g. by a roof
    • 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
    • F26B2200/12—Manure
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock
    • Y02P20/145—Feedstock the feedstock being materials of biological origin

Definitions

  • the present invention relates to a slurry drying method and a slurry dryer.
  • One known way to dry a liquid manure consists in mixing a dry part of a liquid manure having been previously dried in a drier with a liquid part of a fresh liquid manure. The mixing can be done by stirring, for example, by means of an endless screw. The two parts, dry and liquid, are introduced into an endless screw and the mixture obtained is piled up. The contents of this pile are transferred to the dryer to dry it and thus form a new dry part.
  • This process requires significant handling of raw materials and is expensive.
  • the object of the invention is to propose in particular a drying process which reduces the handling of raw materials.
  • a slurry drying method is proposed using a dryer provided with a perforated bottom intended to receive a layer of slurry for its drying by circulation of air through said bottom, the method being remarkable in that
  • the method consists in pouring the slurry over almost the entire surface of said layer to impregnate a large volume of said layer.
  • the method consists in spraying said layer with liquid slurry.
  • the method consists in forming swaths on said layer with pasty slurry.
  • the method consists in brewing almost all of the upper part of said layer by a circular movement of fingers parallel to said layer in order to obtain high-efficiency mixing.
  • the method consists in temporarily suspending the spillage of liquid during the mixing of the upper part of said layer.
  • a dryer comprising a perforated bottom intended to receive a slurry layer for its drying by circulation of air through said bottom is also covered in the invention.
  • the dryer is remarkable in that it comprises a stirring device arranged to slide above the bottom, comprising a slurry distribution means provided for pouring slurry with a high water content on said layer and a mixer provided for mixing the upper part of said layer in order to impregnate it with the spilled slurry.
  • the mixer comprises a plurality of fingers capable of being able to be moved in said layer in a cycloidal movement so that a determined height of said layer can in this way be stirred.
  • the mixer consists of arms each supporting at least one finger, each arm being provided with a crank pin, the crank pins being driven, by means of a connecting rod, by a drive means.
  • the dispensing means consists of a trough disposed transversely to the dryer and which is open in its upper part and in which is mounted a rotary ejector capable of being able to be driven in rotation to spray the surface of said layer with liquid slurry, the trough being connected, via a pump to a liquid slurry storage tank.
  • the latter comprises a supply belt intended to pour pasty slurry in the form of swaths on the surface of said layer.
  • the conveyor belt is provided with a scraper slidably mounted thereon in an alternating movement so that it can, in one direction of movement, allow the loading of slurry on the feed belt and, in the other direction of movement, allow the discharge of slurry supported by the feed belt on the surface of said layer.
  • the scraper consists of an inclined wall mounted between two flanges, at least one of which is provided with an opening in which a lug can take place connected to the belt of the supply belt.
  • FIG. 1 shows a longitudinal sectional view of a dryer according to the invention
  • FIG. 2 shows a longitudinal and schematic view of a stirring device connected to a storage tank according to the invention
  • FIG. 3 shows a top view of a dryer according to the invention
  • FIG. 4 shows a longitudinal sectional view of a drier whose stirring device is being worked according to the invention
  • FIG. 5 shows a top view of a dryer provided with an alternative embodiment of a stirring device according to the invention
  • Fig. 6 shows a transverse view of a dryer provided with an alternative embodiment of a stirring device according to the invention
  • FIG. 7a shows a side view of a mobile scraper during movement of an alternative embodiment of a stirring device according to the invention
  • FIG. 7b shows a side view of a mobile scraper during movement in an opposite direction of an alternative embodiment of a stirring device according to the invention.
  • the dryer 100 shown in FIG. 1 consists of a bottom 120 disposed above an enclosure 110 delimited laterally by side walls 130, the assembly resting on a base 140.
  • the bottom 120 is intended to receive slurry which should be deposited under the shape of a layer H of substantially constant thickness.
  • the bottom 120 is permeable so as to allow the passage of a gas, such as air, through the slurry to allow its drying.
  • the bottom 120 is, for this purpose, provided with passages 122.
  • a stirring device 200 is arranged above the bottom 120. It is mounted to slide parallel to the bottom 120. It is designed to pour slurry at high water content on layer H and to stir the upper part of layer H of slurry in order to impregnate it with the spilled manure.
  • the stirring device 200 operates after a step of drying the slurry layer H and after a step of extracting the most dehydrated part of the slurry layer H, that is to say the lower part of said layer H of slurry.
  • the stirring device 200 comprises a carriage 210 supporting a slurry distribution means 220 and a mixer 230.
  • the stirring device 200 is slidably mounted on rails 160 fixed to the dryer 100, for example, by means of uprights 162.
  • a drive means such as an electric motor associated with a pinion type mechanism / rack, not shown, allows the carriage 210 to move over the entire length of the bottom 120 between the two ends of said bottom.
  • the stirring device 200 is shown in its starting position where it is parked at one end of the bottom 120.
  • the slurry distribution means 220 shown in FIG. 1 is suitable for pouring liquid manure onto said layer H of manure by spraying. It is advantageously constituted in FIG.
  • the gauge 222 is connected, via a supply line 250 to a storage tank 270 intended to contain liquid slurry.
  • a pump 260 allows the liquid slurry contained in the storage tank 270 to be transferred into the trough 222 so that during the movement of the stirring device 200 the rotary ejector 224 can pour it over almost the entire surface upper layer H of slurry.
  • a flow meter 262 can be installed in the slurry supply circuit to measure the flow and volume of liquid slurry arriving in the trough 222.
  • the mixer 230 is designed to stir the upper part of the slurry layer in order to impregnate with freshly poured slurry.
  • the mixer 230 is made for this purpose, in FIG. 2, of a plurality of fingers 232 able to be moved in the slurry layer H by a drive means 240.
  • the fingers 232 can be moved in a circular movement parallel to the layer H, as shown by the arrow D in this Fig. 2.
  • the mixer 230 comprises a series of arms 234 at the ends of which fingers 232 are respectively mounted.
  • Each arm 234 is mounted for free rotation by an axis 236 in a cross member 238.
  • the drive means 240 is advantageously constituted in Figs. 2 and 3 by a connecting rod 242 joining, on the one hand, crank pins 244 provided on discs connected to the axes 236 and, on the other hand, another crank pin 246 also provided on a disc driven in rotation by a motor 248 fixed on the cross-member 238.
  • the fingers 232 thus describe cycloids which allows them to cover almost the entire surface of the layer H of slurry so that that the upper part of said layer may have a homogeneous structure and the humidity of which is increased rapidly after the pouring of the slurry by the distribution means 220.
  • Slurry is deposited in the form of a layer H on the bottom 120 as shown in FIG. 1.
  • the fan or fans 150 are put into operation and pressurized air then passes through the slurry layer H to dehydrate it.
  • it may be useful to deposit beforehand on the bottom 120 a layer of permeable material such as a layer of corn cobs.
  • the air saturates with humidity by passing through the H slurry layer so that the lower part of the H layer dehydrates faster than the upper part.
  • the air intended to be used to dry the slurry layer H comes, preferably, from the air extracted from livestock buildings or from air heated by solar collectors or even from the air heated by energy production by co-generation.
  • the slurry distribution means 220 pours liquid slurry pumped from the storage tank 270 onto the surface of the slurry layer H, then the fingers 232 of the mixer 230 stir the upper part of the slurry layer H for the mix with the spilled slurry.
  • the mixer 230 also levels the layer H of slurry so that the said layer H can be dried uniformly by the action of the fans 150.
  • the movement of the carriage 210 is interrupted when the carriage 210 reaches the other end of the bottom 120 and the slurry spillage on the surface of the layer
  • H of slurry is stopped by stopping the pump 260. It then returns to its starting position to, for example, start a new spill and stirring cycle.
  • the operation of the mixer 230 is preferably maintained to further promote the impregnation of the upper part of the slurry layer H by the recently spilled slurry.
  • An elevation device can be provided for lifting the stirring device 200 when it returns to its starting position or for adjusting the penetration depth of the fingers in the slurry layer H.
  • the operation of the stirring device 200 is then suspended until the layer H of manure can be dried by air ventilation. During the operation of incorporating slurry into layer H, the drying by circulation of air in said layer is preferably maintained.
  • the drying method and the dryer of the invention make it possible to considerably reduce the handling of the raw material compared to known techniques.
  • An alternative embodiment of the slurry distribution means is presented in FIG. 5. This is suitable for depositing on the surface of layer H, slurry of the pasty type which could not normally be pumped.
  • the slurry distribution means 220 ′ advantageously consists of a first supply belt 252 of said pasty slurry which is arranged longitudinally above the dryer 100 and a second supply belt 254 fixed to the stirring device 200 in being arranged transversely above the dryer 100.
  • a first fixed scraper 256 consisting of an inclined wall, is mounted on the first feed belt 252 in such a way that it can allow the pouring of the pasty slurry transported on the first conveyor belt 252 on the second conveyor belt 254.
  • the directions of movement of the upper faces of the belts 252 and 254 are indicated respectively by the arrows E and F.
  • a second mobile scraper 258 is slidably mounted on the second feed belt 254 in an alternating movement so that it can, in one direction of movement, allow the loading of pasty slurry onto the second feed belt 254 and, in the other direction of movement, allow the pouring of the pasty slurry supported by the second supply belt 254 on the surface of the layer H of slurry.
  • the scraper 258 is made for this purpose, in FIG. 7a, of an inclined wall mounted between two flanges 272 at least one of which is provided with an opening 274 in which a lug 276 can take place connected to the mat of the second feed mat 254.
  • a lug 276 when the lug 276 is disposed on the upper face of the mat, it drives the scraper 258 in the same direction as that in which the said upper face circulates, that is to say the direction indicated by the arrow F, then that when the pin 276 is arranged on the underside of the mat, as shown in FIG. 7b, it drives the scraper 258 in the direction opposite to that in which said upper face circulates.
  • the slurry distribution means 220 Given the movement of the stirring device 200, the slurry distribution means 220 then transversely forms swaths on the surface of the slurry layer H. These are then incorporated into the upper part of said layer by the mixer 230.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental Sciences (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention relates to a method for drying manure slurry by means of a dryer (100) comprising a bottom (120) for receiving a slurry layer (H) for drying it by air circulating therethrough. The inventive method is characterised in that it consists in pouring the manure slurry highly diluted with water on the slurry layer (H), and, afterwards agitating the top part thereof in order to impregnate said layer (H) with the poured manure slurry. Said invention also relates to a dryer (100) comprising a perforated bottom (120) for drying the received slurry layer (H) by air circulating therethrough Said dryer (100) is characterised in that it comprises an agitating device (200) which is slidingly arranged above the bottom (120) provided with slurry distribution means (220, 220') for pouring the manure slurry highly diluted with water on the layer (H) and a mixer (230) for agitating the top part of the layer (H) in order to impregnate it with the poured manure slurry.

Description

Procédé de séchage de lisier et séchoir à lisier Slurry drying process and slurry dryer
La présente invention concerne un procédé de séchage de lisier et un séchoir à lisier. Une manière connue pour sécher un lisier consiste à mélanger une partie sèche d'un lisier ayant été préalablement séchée dans un séchoir avec une partie liquide d'un lisier frais. Le mélange peut se faire par brassage, par exemple, par l'intermédiaire d'une vis sans fin. Les deux parties sèche et liquide sont introduites dans une vis sans fin et le mélange obtenu est mis en tas. Le contenu de ce tas est transféré dans le séchoir pour le sécher et ainsi former une nouvelle partie sèche. Ce procédé nécessite une manutention importante des matières premières et s'avère coûteux. Aussi, le but de l'invention est de proposer notamment un procédé de séchage qui réduise la manutention des matières premières. A cet effet, est proposé un procédé de séchage de lisier mettant en œuvre un séchoir pourvu d'un fond perforé destiné à recevoir une couche de lisier pour son séchage par circulation d'air au travers dudit fond, le procédé étant remarquable en ce The present invention relates to a slurry drying method and a slurry dryer. One known way to dry a liquid manure consists in mixing a dry part of a liquid manure having been previously dried in a drier with a liquid part of a fresh liquid manure. The mixing can be done by stirring, for example, by means of an endless screw. The two parts, dry and liquid, are introduced into an endless screw and the mixture obtained is piled up. The contents of this pile are transferred to the dryer to dry it and thus form a new dry part. This process requires significant handling of raw materials and is expensive. Also, the object of the invention is to propose in particular a drying process which reduces the handling of raw materials. To this end, a slurry drying method is proposed using a dryer provided with a perforated bottom intended to receive a layer of slurry for its drying by circulation of air through said bottom, the method being remarkable in that
qu'il consiste à déverser du lisier à forte teneur en eau sur ladite couche de lisier, puis à brasser la partie supérieure de ladite couche de lisier afin de l'imprégner avec le lisier déversé. Ainsi, l'incorporation de lisier liquide ou pâteux avec du lisier déjà en partie déshydraté se fait sans manipulation du lisier en cours de séchage. Selon une caractéristique additionnelle de l'invention, le procédé consiste à déverser le lisier sur la quasi-totalité de la surface de ladite couche pour imprégner un grand volume de ladite couche. Avantageusement, le procédé consiste à asperger ladite couche avec du lisier liquide. Avantageusement, le procédé consiste à former des andains sur ladite couche avec du lisier pâteux. Selon une caractéristique additionnelle de l'invention, le procédé consiste à brasser la quasi-totalité de la partie supérieure de ladite couche par un déplacement circulaire de doigts parallèlement à ladite couche pour obtenir un brassage de grande efficacité. Selon une caractéristique additionnelle de l'invention, le procédé consiste à suspendre momentanément le déversement de liquide lors du brassage de la partie supérieure de ladite couche. Un séchoir comprenant un fond perforé destiné à recevoir une couche de lisier pour son séchage par circulation d'air au travers dudit fond est également couvert dans l'invention. Le séchoir est remarquable en ce qu'il comprend un dispositif de brassage disposé à coulissement au-dessus du fond, comprenant un moyen de distribution de lisier prévu pour déverser du lisier à forte teneur en eau sur ladite couche et un mélangeur prévu pour brasser la partie supérieure de ladite couche afin de l'imprégner avec le lisier déversé. La quasi-totalité de la surface supérieure de ladite couche de lisier peut ainsi être recouverte par du lisier liquide ou pâteux et la quasi- totalité de ladite couche supérieure peut de la sorte être brassée. Selon une caractéristique additionnelle de l'invention, le mélangeur comprend une pluralité de doigts aptes à pouvoir être déplacés dans ladite couche suivant un mouvement cycloïdal si bien qu'une hauteur déterminée de ladite couche peut de la sorte être brassée. Dans un mode de réalisation avantageux, le mélangeur est constitué de bras supportant chacun au moins un doigt, chaque bras étant pourvu d'un maneton, les manetons étant entraînés, par l'intermédiaire d'une bielle, par un moyen d'entraînement. Dans un mode de réalisation avantageux, le moyen de distribution est constitué d'une auge disposée transversalement au séchoir et qui est ouverte dans sa partie haute et dans laquelle est monté un éjecteur rotatif apte à pouvoir être entraîné en rotation pour asperger la surface de ladite couche avec du lisier liquide, l'auge étant raccordée, par l'intermédiaire d'une pompe à un réservoir de stockage de lisier liquide. Dans une variante de réalisation du moyen de distribution, celui-ci comprend un tapis d'amenage prévu pour déverser du lisier pâteux sous la forme d'andains sur la surface de ladite couche. Selon une caractéristique additionnelle de l'invention, le tapis d'amenage est pourvu d'un racleur monté à coulissement sur celui-ci suivant un mouvement alternatif afin qu'il puisse, dans un sens de déplacement, permettre le chargement de lisier sur le tapis d'amenage et, dans l'autre sens de déplacement, permettre le déversement de lisier supporté par le tapis d'amenage sur la surface de ladite couche. Selon une caractéristique additionnelle de l'invention, le racleur est constitué d'une paroi inclinée montée entre deux flasques dont au moins un est pourvu d'une ouverture dans laquelle peut prendre place un ergot relié au tapis du tapis d'amenage. Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'un exemple de réalisation, ladite description étant faite en relation avec les dessins joints, parmi lesquels: la Fig. 1 représente une vue longitudinale en coupe d'un séchoir selon l'invention, la Fig. 2 représente une vue longitudinale et schématique d'un dispositif de brassage raccordé à un réservoir de stockage selon l'invention, la Fig. 3 représente une vue de dessus d'un séchoir selon l'invention, la Fig. 4 représente une vue longitudinale en coupe d'un séchoir dont le dispositif de brassage est en cours de travail selon l'invention, la Fig. 5 représente une vue de dessus d'un séchoir pourvu d'une variante de réalisation d'un dispositif de brassage selon l'invention, la Fig. 6 représente une vue transversale d'un séchoir pourvu d'une variante de réalisation d'un dispositif de brassage selon l'invention, la Fig. 7a représente une vue latérale d'un racleur mobile en cours de déplacement d'une variante de réalisation d'un dispositif de brassage selon l'invention, et la Fig. 7b représente une vue latérale d'un racleur mobile en cours de déplacement dans une direction opposée d'une variante de réalisation d'un dispositif de brassage selon l'invention. Le séchoir 100 représenté à la Fig. 1 est constitué d'un fond 120 disposé au- dessus d'une enceinte 110 délimitée latéralement par des parois latérales 130, l'ensemble reposant sur un socle 140. Le fond 120 est destiné à recevoir du lisier qu'il convient de déposer sous la forme d'une couche H d'épaisseur sensiblement constante. Le fond 120 est perméable de manière à permettre le passage d'un gaz, tel que de l'air, au travers du lisier pour permettre son séchage. Le fond 120 est, à cet effet, pourvu de passages 122. De l'air admis en surpression dans l'enceinte 110, par exemple, par l'intermédiaire d'un ou de plusieurs ventilateurs 150 peut de la sorte traverser la couche H de lisier pour le sécher, suivant en cela des trajectoires symbolisées par les flèches A. Un dispositif de brassage 200 est disposé au-dessus du fond 120. Il est monté à coulissement parallèlement au fond 120. Il est prévu pour déverser du lisier à forte teneur en eau sur la couche H et pour remuer la partie supérieure de la couche H de lisier afin de l'imprégner avec le lisier déversé. Le dispositif de brassage 200 intervient après une étape de séchage de la couche H de lisier et après une étape d'extraction de la partie la plus déshydratée de la couche H de lisier, c'est-à-dire la partie inférieure de ladite couche H de lisier. Le dispositif de brassage 200 comprend un chariot 210 supportant un moyen de distribution de lisier 220 et un mélangeur 230. A la Fig. 1, le dispositif de brassage 200 est monté à coulissement sur des rails 160 fixés au séchoir 100, par exemple, par l'intermédiaire de montants 162. Un moyen d'entraînement, tel qu'un moteur électrique associé avec un mécanisme de type pignon/crémaillère, non représenté, permet le déplacement du chariot 210 sur toute la longueur du fond 120 entre les deux extrémités dudit fond. A la Fig. 1, le dispositif de brassage 200 est représenté dans sa position de départ où il est stationné à une extrémité du fond 120. Le moyen de distribution de lisier 220 représenté à la Fig. 1 est adapté pour déverser du lisier liquide sur ladite couche H de lisier par aspersion. Il est constitué avantageusement à la Fig. 2 d'une auge 222 disposée transversalement au séchoir et qui est ouverte dans sa partie haute et dans laquelle un éjecteur rotatif 224 tel qu'un hérisson peut être entraîné en rotation comme l'indique la flèche C par un moyen non représenté à cette Fig. . L'auge 222 est raccordée, par l'intermédiaire d'une conduite d'amenée 250 à un réservoir de stockage 270 destiné à contenir du lisier liquide. Une pompe 260 permet de transférer le lisier liquide contenu dans le réservoir de stockage 270 dans l'auge 222 de manière à ce que lors du déplacement du dispositif de brassage 200 l'éjecteur rotatif 224 puisse le déverser sur la quasi-totalité de la surface supérieure de la couche H de lisier. Un débitmètre 262 peut être installé dans le circuit d'amenée du lisier pour mesurer le débit et le volume de lisier liquide parvenant dans l'auge 222. Le mélangeur 230 est conçu pour brasser la partie supérieure de la couche de lisier afin de l'imprégner avec du lisier venant d'être déversé. Le mélangeur 230 est constitué à cet effet, à la Fig. 2, d'une pluralité de doigts 232 aptes à pouvoir être déplacés dans la couche H de lisier par un moyen d'entraînement 240. Avantageusement les doigts 232 peuvent être déplacés suivant un mouvement circulaire parallèle à la couche H, comme le montre la flèche D à cette Fig. 2. A cet effet, le mélangeur 230 comprend une série de bras 234 aux extrémités desquels sont montés respectivement des doigts 232. Chaque bras 234 est monté libre à rotation par un axe 236 dans une traverse 238. Le moyen d'entraînement 240 est avantageusement constitué aux Figs. 2 et 3 par une bielle 242 réunissant, d'une part, des manetons 244 prévus sur des disques reliés aux axes 236 et, d'autre part, un autre maneton d'entraînement 246 prévu également sur un disque entraîné en rotation par un moteur 248 fixé sur la traverse 238. Pendant leurs rotations et lors du déplacement du dispositif de brassage 200, les doigts 232 décrivent ainsi des cycloïdes ce qui leur permet de couvrir la quasi-totalité de la surface de la couche H de lisier de manière à ce que la partie supérieure de ladite couche puisse présenter une structure homogène et dont le degré hygrométrique est accru rapidement après le déversement du lisier par le moyen de distribution 220. Le fonctionnement de l'invention va maintenant être décrit. Du lisier est déposé sous la forme d'une couche H sur le fond 120 comme cela est représenté à la Fig. 1. Pour son séchage, le ou les ventilateurs 150 sont mis en fonctionnement et de l'air sous pression traverse alors la couche H de lisier pour la déshydrater. Pour initier le processus de séchage il peut être utile de déposer préalablement sur le fond 120 une couche de matière perméable telle qu'une couche de rafles de maïs. L'air se sature en humidité en traversant la couche H de lisier si bien que la partie inférieure de la couche H se déshydrate plus rapidement que la partie supérieure. L'air destiné à être utilisé pour sécher la couche H de lisier provient, de préférence, de l'air extrait de bâtiments d'élevage ou d'air réchauffé par des capteurs solaires ou bien encore de l'air chauffé par des systèmes de production d'énergie par co-génération. Lorsque l'hygrométrie de cette partie inférieure atteint une valeur convenue, par exemple lorsque le taux de matière sèche atteint 85 %, il convient d'interrompre le séchage et d'extraire cette partie inférieure de la couche H, pour son conditionnement, par un moyen non présenté dans cette invention. On procède ensuite à l'incorporation d'une quantité de lisier dans la couche H, le lisier incorporé ayant un taux de matière sèche nettement inférieur à celui du lisier constituant la couche H. Pour cela, le dispositif de brassage 200 est mis en marche. Le chariot 210 est alors préalablement positionné dans sa position de départ comme cela est représenté à la Fig. 1, puis le chariot 210 est déplacé à vitesse constante suivant une direction représentée par la flèche B comme cela est montré aux Figs. 1 et 4. A ces Figs. 1 et 4, le moyen de distribution de lisier 220 déverse du lisier liquide pompé du réservoir de stockage 270 sur la surface de la couche H de lisier, puis les doigts 232 du mélangeur 230 brassent la partie supérieure de la couche H de lisier pour la mélanger avec le lisier déversé. Le mélangeur 230 nivelle également la couche H de lisier afin que ladite couche H puisse être asséchée de manière uniforme par l'action des ventilateurs 150. Le déplacement du chariot 210 est interrompu lorsque le chariot 210 parvient à l'autre extrémité du fond 120 et le déversement de lisier sur la surface de la couchethat it consists in pouring slurry with a high water content onto said slurry layer, then stirring the upper part of said slurry layer in order to impregnate it with the spilled slurry. Thus, the incorporation of liquid or pasty slurry with already partially dehydrated slurry is done without handling the slurry during drying. According to an additional characteristic of the invention, the method consists in pouring the slurry over almost the entire surface of said layer to impregnate a large volume of said layer. Advantageously, the method consists in spraying said layer with liquid slurry. Advantageously, the method consists in forming swaths on said layer with pasty slurry. According to an additional characteristic of the invention, the method consists in brewing almost all of the upper part of said layer by a circular movement of fingers parallel to said layer in order to obtain high-efficiency mixing. According to an additional characteristic of the invention, the method consists in temporarily suspending the spillage of liquid during the mixing of the upper part of said layer. A dryer comprising a perforated bottom intended to receive a slurry layer for its drying by circulation of air through said bottom is also covered in the invention. The dryer is remarkable in that it comprises a stirring device arranged to slide above the bottom, comprising a slurry distribution means provided for pouring slurry with a high water content on said layer and a mixer provided for mixing the upper part of said layer in order to impregnate it with the spilled slurry. Almost all of the upper surface of said slurry layer can thus be covered by liquid or pasty slurry and almost all of said upper layer can thus be stirred. According to an additional characteristic of the invention, the mixer comprises a plurality of fingers capable of being able to be moved in said layer in a cycloidal movement so that a determined height of said layer can in this way be stirred. In an advantageous embodiment, the mixer consists of arms each supporting at least one finger, each arm being provided with a crank pin, the crank pins being driven, by means of a connecting rod, by a drive means. In an advantageous embodiment, the dispensing means consists of a trough disposed transversely to the dryer and which is open in its upper part and in which is mounted a rotary ejector capable of being able to be driven in rotation to spray the surface of said layer with liquid slurry, the trough being connected, via a pump to a liquid slurry storage tank. In an alternative embodiment of the distribution means, the latter comprises a supply belt intended to pour pasty slurry in the form of swaths on the surface of said layer. According to an additional characteristic of the invention, the conveyor belt is provided with a scraper slidably mounted thereon in an alternating movement so that it can, in one direction of movement, allow the loading of slurry on the feed belt and, in the other direction of movement, allow the discharge of slurry supported by the feed belt on the surface of said layer. According to an additional characteristic of the invention, the scraper consists of an inclined wall mounted between two flanges, at least one of which is provided with an opening in which a lug can take place connected to the belt of the supply belt. The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being made in relation to the accompanying drawings, among which: FIG. . 1 shows a longitudinal sectional view of a dryer according to the invention, FIG. 2 shows a longitudinal and schematic view of a stirring device connected to a storage tank according to the invention, FIG. 3 shows a top view of a dryer according to the invention, FIG. 4 shows a longitudinal sectional view of a drier whose stirring device is being worked according to the invention, FIG. 5 shows a top view of a dryer provided with an alternative embodiment of a stirring device according to the invention, Fig. 6 shows a transverse view of a dryer provided with an alternative embodiment of a stirring device according to the invention, FIG. 7a shows a side view of a mobile scraper during movement of an alternative embodiment of a stirring device according to the invention, and FIG. 7b shows a side view of a mobile scraper during movement in an opposite direction of an alternative embodiment of a stirring device according to the invention. The dryer 100 shown in FIG. 1 consists of a bottom 120 disposed above an enclosure 110 delimited laterally by side walls 130, the assembly resting on a base 140. The bottom 120 is intended to receive slurry which should be deposited under the shape of a layer H of substantially constant thickness. The bottom 120 is permeable so as to allow the passage of a gas, such as air, through the slurry to allow its drying. The bottom 120 is, for this purpose, provided with passages 122. Air admitted under overpressure into the enclosure 110, for example, via one or more fans 150 can in this way pass through the layer H slurry to dry it, following in this way the paths symbolized by the arrows A. A stirring device 200 is arranged above the bottom 120. It is mounted to slide parallel to the bottom 120. It is designed to pour slurry at high water content on layer H and to stir the upper part of layer H of slurry in order to impregnate it with the spilled manure. The stirring device 200 operates after a step of drying the slurry layer H and after a step of extracting the most dehydrated part of the slurry layer H, that is to say the lower part of said layer H of slurry. The stirring device 200 comprises a carriage 210 supporting a slurry distribution means 220 and a mixer 230. In FIG. 1, the stirring device 200 is slidably mounted on rails 160 fixed to the dryer 100, for example, by means of uprights 162. A drive means, such as an electric motor associated with a pinion type mechanism / rack, not shown, allows the carriage 210 to move over the entire length of the bottom 120 between the two ends of said bottom. In Fig. 1, the stirring device 200 is shown in its starting position where it is parked at one end of the bottom 120. The slurry distribution means 220 shown in FIG. 1 is suitable for pouring liquid manure onto said layer H of manure by spraying. It is advantageously constituted in FIG. 2 of a trough 222 arranged transversely to the dryer and which is open in its upper part and in which a rotary ejector 224 such as a hedgehog can be driven in rotation as indicated by arrow C by a means not shown in this FIG . . The gauge 222 is connected, via a supply line 250 to a storage tank 270 intended to contain liquid slurry. A pump 260 allows the liquid slurry contained in the storage tank 270 to be transferred into the trough 222 so that during the movement of the stirring device 200 the rotary ejector 224 can pour it over almost the entire surface upper layer H of slurry. A flow meter 262 can be installed in the slurry supply circuit to measure the flow and volume of liquid slurry arriving in the trough 222. The mixer 230 is designed to stir the upper part of the slurry layer in order to impregnate with freshly poured slurry. The mixer 230 is made for this purpose, in FIG. 2, of a plurality of fingers 232 able to be moved in the slurry layer H by a drive means 240. Advantageously the fingers 232 can be moved in a circular movement parallel to the layer H, as shown by the arrow D in this Fig. 2. To this end, the mixer 230 comprises a series of arms 234 at the ends of which fingers 232 are respectively mounted. Each arm 234 is mounted for free rotation by an axis 236 in a cross member 238. The drive means 240 is advantageously constituted in Figs. 2 and 3 by a connecting rod 242 joining, on the one hand, crank pins 244 provided on discs connected to the axes 236 and, on the other hand, another crank pin 246 also provided on a disc driven in rotation by a motor 248 fixed on the cross-member 238. During their rotations and during the movement of the stirring device 200, the fingers 232 thus describe cycloids which allows them to cover almost the entire surface of the layer H of slurry so that that the upper part of said layer may have a homogeneous structure and the humidity of which is increased rapidly after the pouring of the slurry by the distribution means 220. The operation of the invention will now be described. Slurry is deposited in the form of a layer H on the bottom 120 as shown in FIG. 1. For drying, the fan or fans 150 are put into operation and pressurized air then passes through the slurry layer H to dehydrate it. To initiate the drying process, it may be useful to deposit beforehand on the bottom 120 a layer of permeable material such as a layer of corn cobs. The air saturates with humidity by passing through the H slurry layer so that the lower part of the H layer dehydrates faster than the upper part. The air intended to be used to dry the slurry layer H comes, preferably, from the air extracted from livestock buildings or from air heated by solar collectors or even from the air heated by energy production by co-generation. When the hygrometry of this lower part reaches an agreed value, for example when the dry matter content reaches 85%, it is advisable to interrupt the drying and to extract this lower part of the layer H, for its conditioning, by a means not presented in this invention. Next, a quantity of slurry is incorporated into the layer H, the incorporated slurry having a dry matter content that is significantly lower than that of the slurry constituting the layer H. For this, the stirring device 200 is started. . The carriage 210 is then previously positioned in its starting position as shown in FIG. 1, then the carriage 210 is moved at constant speed in a direction represented by the arrow B as shown in Figs. 1 and 4. In these Figs. 1 and 4, the slurry distribution means 220 pours liquid slurry pumped from the storage tank 270 onto the surface of the slurry layer H, then the fingers 232 of the mixer 230 stir the upper part of the slurry layer H for the mix with the spilled slurry. The mixer 230 also levels the layer H of slurry so that the said layer H can be dried uniformly by the action of the fans 150. The movement of the carriage 210 is interrupted when the carriage 210 reaches the other end of the bottom 120 and the slurry spillage on the surface of the layer
H de lisier est stoppé par arrêt de la pompe 260. Il retourne ensuite vers sa position de départ pour, par exemple, démarrer un nouveau cycle de déversement et de brassage. Lors du retour du chariot 210, le fonctionnement du mélangeur 230 est de préférence maintenu pour favoriser encore l'imprégnation de la partie supérieure de la couche H de lisier par le lisier récemment déversé. Un dispositif d'élévation, non représenté, peut être prévu pour soulever le dispositif de brassage 200 lors de son retour vers sa position de départ ou pour régler la profondeur de pénétration des doigts dans la couche H de lisier. Lorsqu'une quantité déterminée de lisier liquide a été déversée, le fonctionnement du dispositif de brassage 200 est alors suspendu le temps que la couche H de lisier puisse être séchée par ventilation d'air. Pendant l'opération d'incorporation de lisier à la couche H, le séchage par circulation d'air dans ladite couche est de préférence maintenu. Le procédé de séchage et le séchoir de l'invention permettent de réduire considérablement la manutention de la matière première comparativement aux techniques connues. Une variante de réalisation du moyen de distribution de lisier est présentée à la Fig. 5. Celle-ci est adaptée pour déposer sur la surface de la couche H, du lisier de type pâteux qui ne pourrait être normalement pompé. Le moyen de distribution de lisier 220' est avantageusement constitué d'un premier tapis d'amenage 252 dudit lisier pâteux qui est disposé longitudinalement au- dessus du séchoir 100 et d'un second tapis d'amenage 254 fixé au dispositif de brassage 200 en étant disposé transversalement au-dessus du séchoir 100. Un premier racleur 256 fixe, constitué d'une paroi inclinée, est monté sur le premier tapis d'amenage 252 de telle manière qu'il puisse permettre le déversement du lisier pâteux transporté sur le premier tapis d'amenage 252 sur le second tapis d'amenage 254. Les sens de déplacement des faces supérieures des tapis 252 et 254 sont indiqués respectivement par les flèches E et F. Aux Figs. 5 et 6, un second racleur 258 mobile est monté à coulissement sur le second tapis d'amenage 254 suivant un mouvement alternatif afin qu'il puisse, dans un sens de déplacement, permettre le chargement de lisier pâteux sur le second tapis d'amenage 254 et, dans l'autre sens de déplacement, permettre le déversement du lisier pâteux supporté par le second tapis d'amenage 254 sur la surface de la couche H de lisier. Le racleur 258 est constitué à cet effet, à la Fig. 7a, d'une paroi inclinée montée entre deux flasques 272 dont au moins un est pourvu d'une ouverture 274 dans laquelle peut prendre place un ergot 276 relié au tapis du second tapis d'amenage 254. A la Fig. 7a, lorsque l'ergot 276 est disposé sur la face supérieure du tapis, il entraîne le racleur 258 dans la même direction que celle dans laquelle circule ladite face supérieure, c'est-à-dire la direction indiquée par la flèche F, alors que lorsque l'ergot 276 est disposé sur la face inférieure du tapis, comme cela apparaît à la Fig. 7b, il entraîne le racleur 258 dans la direction opposée à celle dans laquelle circule ladite face supérieure. Compte tenu du déplacement du dispositif de brassage 200, le moyen de distribution de lisier 220 forme alors transversalement des andains sur la surface de la couche H de lisier. Ceux-ci sont ensuite incorporés à la partie supérieure de ladite couche par le mélangeur 230. H of slurry is stopped by stopping the pump 260. It then returns to its starting position to, for example, start a new spill and stirring cycle. When the carriage 210 returns, the operation of the mixer 230 is preferably maintained to further promote the impregnation of the upper part of the slurry layer H by the recently spilled slurry. An elevation device, not shown, can be provided for lifting the stirring device 200 when it returns to its starting position or for adjusting the penetration depth of the fingers in the slurry layer H. When a determined quantity of liquid manure has been discharged, the operation of the stirring device 200 is then suspended until the layer H of manure can be dried by air ventilation. During the operation of incorporating slurry into layer H, the drying by circulation of air in said layer is preferably maintained. The drying method and the dryer of the invention make it possible to considerably reduce the handling of the raw material compared to known techniques. An alternative embodiment of the slurry distribution means is presented in FIG. 5. This is suitable for depositing on the surface of layer H, slurry of the pasty type which could not normally be pumped. The slurry distribution means 220 ′ advantageously consists of a first supply belt 252 of said pasty slurry which is arranged longitudinally above the dryer 100 and a second supply belt 254 fixed to the stirring device 200 in being arranged transversely above the dryer 100. A first fixed scraper 256, consisting of an inclined wall, is mounted on the first feed belt 252 in such a way that it can allow the pouring of the pasty slurry transported on the first conveyor belt 252 on the second conveyor belt 254. The directions of movement of the upper faces of the belts 252 and 254 are indicated respectively by the arrows E and F. In Figs. 5 and 6, a second mobile scraper 258 is slidably mounted on the second feed belt 254 in an alternating movement so that it can, in one direction of movement, allow the loading of pasty slurry onto the second feed belt 254 and, in the other direction of movement, allow the pouring of the pasty slurry supported by the second supply belt 254 on the surface of the layer H of slurry. The scraper 258 is made for this purpose, in FIG. 7a, of an inclined wall mounted between two flanges 272 at least one of which is provided with an opening 274 in which a lug 276 can take place connected to the mat of the second feed mat 254. In Fig. 7a, when the lug 276 is disposed on the upper face of the mat, it drives the scraper 258 in the same direction as that in which the said upper face circulates, that is to say the direction indicated by the arrow F, then that when the pin 276 is arranged on the underside of the mat, as shown in FIG. 7b, it drives the scraper 258 in the direction opposite to that in which said upper face circulates. Given the movement of the stirring device 200, the slurry distribution means 220 then transversely forms swaths on the surface of the slurry layer H. These are then incorporated into the upper part of said layer by the mixer 230.

Claims

REVENDICATIONS
1) Procédé de séchage de lisier mettant en œuvre un séchoir (100) pourvu d'un fond (120) perforé destiné à recevoir une couche (H) de lisier pour son séchage par circulation d'air au travers dudit fond (120), caractérisé en ce qu'il consiste à déverser du lisier à forte teneur en eau sur la couche (H), puis à brasser la partie supérieure de ladite couche (H) afin de l'imprégner avec le lisier déversé. 2) Procédé de séchage selon la revendication 1, caractérisé en ce qu'il consiste à déverser le lisier sur la quasi-totalité de la surface de ladite couche. 3) Procédé de séchage selon la revendication 2, caractérisé en ce qu'il consiste à asperger ladite couche avec du lisier liquide. 4) Procédé de séchage selon la revendication 2, caractérisé en ce qu'il consiste à former des andains sur ladite couche avec du lisier pâteux. 5) Procédé de séchage selon l'une des revendications 1 à 4, caractérisé en ce qu'il consiste à brasser la quasi-totalité de la partie supérieure de ladite couche par un déplacement circulaire de doigts (232) parallèlement à ladite couche (H). 6) Procédé de séchage selon l'une des revendications 1 à 5, caractérisé en ce qu'il consiste à suspendre momentanément le déversement de liquide lors du brassage de la partie supérieure de ladite couche. 7) Séchoir (100) comprenant un fond (120) perforé destiné à recevoir une couche (H) de lisier pour son séchage par circulation d'air au travers dudit fond (120), caractérisé en ce qu'il comprend un dispositif de brassage (200) disposé à coulissement au-dessus du fond (120), comprenant un moyen de distribution (220,1) Slurry drying method using a dryer (100) provided with a perforated bottom (120) intended to receive a layer (H) of slurry for its drying by circulation of air through said bottom (120), characterized in that it consists in pouring slurry with a high water content onto the layer (H), then stirring the upper part of said layer (H) in order to impregnate it with the spilled slurry. 2) A drying method according to claim 1, characterized in that it consists in pouring the slurry over almost the entire surface of said layer. 3) A drying method according to claim 2, characterized in that it consists in spraying said layer with liquid slurry. 4) A drying method according to claim 2, characterized in that it consists in forming swaths on said layer with pasty slurry. 5) A drying method according to one of claims 1 to 4, characterized in that it consists in brewing almost all of the upper part of said layer by a circular movement of fingers (232) parallel to said layer (H ). 6) A drying method according to one of claims 1 to 5, characterized in that it consists in temporarily suspending the spillage of liquid during the stirring of the upper part of said layer. 7) Drier (100) comprising a perforated bottom (120) intended to receive a layer (H) of slurry for its drying by circulation of air through said bottom (120), characterized in that it comprises a stirring device (200) arranged to slide above the bottom (120), comprising a distribution means (220,
220') de lisier prévu pour déverser du lisier à forte teneur en eau sur ladite couche220 ') of slurry intended to pour slurry with a high water content on said layer
(H) et un mélangeur (230) prévu pour brasser la partie supérieure de ladite couche(H) and a mixer (230) provided for mixing the upper part of said layer
(H) afin de l'imprégner avec le lisier déversé. 8) Séchoir selon la revendication 7, caractérisé en ce que le mélangeur (230) comprend une pluralité de doigts (232) aptes à pouvoir être déplacés dans ladite couche (H) suivant un mouvement cycloïdal. 9) Séchoir selon la revendication 8, caractérisé en ce que le mélangeur (230) est constitué de bras (234) supportant chacun au moins un doigt (232), chaque bras (234) étant pourvu d'un maneton (244), les manetons (244) étant entraînés, par l'intermédiaire d'une bielle (242), par un moyen d'entraînement (240). 10) Séchoir selon l'une quelconque des revendications 7 à 9, caractérisé en ce que le moyen de distribution (220) est constitué d'une auge (222) disposée transversalement au séchoir (100) et qui est ouverte dans sa partie haute et dans laquelle est monté un éjecteur rotatif (224) apte à pouvoir être entraîné en rotation, l'auge (222) étant raccordée, par l'intermédiaire d'une pompe (260) à un réservoir de stockage (270) de lisier liquide. 11) Séchoir selon l'une quelconque des revendications 7 à 10, caractérisé en ce que le moyen de distribution (220') comprend un tapis d'amenage (254). 12) Séchoir selon la revendication 11, caractérisé en ce que le tapis d'amenage (254) est pourvu d'un racleur (258) monté à coulissement sur celui-ci suivant un mouvement alternatif afin qu'il puisse, dans un sens de déplacement, permettre le chargement de lisier sur le tapis d'amenage (254) et, dans l'autre sens de déplacement, permettre le déversement de lisier supporté par le tapis d'amenage (254) sur la surface de ladite couche (H). 13) Séchoir selon la revendication 12, caractérisé en ce que le racleur (258) est constitué d'une paroi inclinée montée entre deux flasques (272) dont au moins un est pourvu d'une ouverture (274) dans laquelle peut prendre place un ergot (276) relié au tapis du tapis d'amenage (254). (H) in order to impregnate it with the spilled slurry. 8) A dryer according to claim 7, characterized in that the mixer (230) comprises a plurality of fingers (232) able to be moved in said layer (H) in a cycloidal movement. 9) A dryer according to claim 8, characterized in that the mixer (230) consists of arms (234) each supporting at least one finger (232), each arm (234) being provided with a crank pin (244), the crank pins (244) being driven, via a connecting rod (242), by a drive means (240). 10) A dryer according to any one of claims 7 to 9, characterized in that the distribution means (220) consists of a trough (222) arranged transversely to the dryer (100) and which is open in its upper part and in which is mounted a rotary ejector (224) able to be driven in rotation, the trough (222) being connected, by means of a pump (260) to a storage tank (270) of liquid slurry. 11) Drier according to any one of claims 7 to 10, characterized in that the distribution means (220 ') comprises a supply belt (254). 12) A dryer according to claim 11, characterized in that the feed belt (254) is provided with a scraper (258) mounted to slide thereon in an alternating movement so that it can, in a direction of movement, allow the loading of slurry on the supply belt (254) and, in the other direction of movement, allow the discharge of slurry supported by the supply belt (254) on the surface of said layer (H) . 13) dryer according to claim 12, characterized in that the scraper (258) consists of an inclined wall mounted between two flanges (272) at least one of which is provided with an opening (274) in which can take a lug (276) connected to the mat of the feed mat (254).
PCT/FR2003/002345 2003-07-25 2003-07-25 Method for drying manure slurry and a slurry dryer WO2005019751A1 (en)

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WO2009056895A2 (en) * 2007-10-30 2009-05-07 LO-KA Környezetvédelmi Kft. Process and apparatus for the production of organic fertilizer
WO2009056895A3 (en) * 2007-10-30 2009-09-11 LO-KA Környezetvédelmi Kft. Process and apparatus for the production of organic fertilizer
ES2449667A1 (en) * 2013-09-19 2014-03-20 Test Positive, S.L. Perfected animal manure drying facility
EP2850927A1 (en) * 2013-09-19 2015-03-25 Test Positive, S.L Perfected animal manure drying facility

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