FR2539586A1 - Dehydration accelerator which can be fitted on a cereal drier operating with a boiler having biofuels - Google Patents

Dehydration accelerator which can be fitted on a cereal drier operating with a boiler having biofuels Download PDF

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Publication number
FR2539586A1
FR2539586A1 FR8301410A FR8301410A FR2539586A1 FR 2539586 A1 FR2539586 A1 FR 2539586A1 FR 8301410 A FR8301410 A FR 8301410A FR 8301410 A FR8301410 A FR 8301410A FR 2539586 A1 FR2539586 A1 FR 2539586A1
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France
Prior art keywords
drying
boiler
thermal
grain
biofuels
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FR8301410A
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French (fr)
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GENESTIER PIERRE
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GENESTIER PIERRE
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Priority to FR8301410A priority Critical patent/FR2539586A1/en
Publication of FR2539586A1 publication Critical patent/FR2539586A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B9/00—Preservation of edible seeds, e.g. cereals
    • A23B9/08—Drying; Subsequent reconstitution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F26B17/16—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials passing down a heated surface, e.g. fluid-heated closed ducts or other heating elements in contact with the moving stack of material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
    • 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
    • F26B3/18—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
    • F26B3/22—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source and the materials or objects to be dried being in relative motion, e.g. of vibration
    • F26B3/26—Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source and the materials or objects to be dried being in relative motion, e.g. of vibration the movement being performed by gravity

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Zoology (AREA)
  • Polymers & Plastics (AREA)
  • Microbiology (AREA)
  • Food Science & Technology (AREA)
  • Wood Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention relates to the field of drying grain, and it may be applied to drying other granular products. This is an additive improving drying, which can be fitted onto the main cereal driers, if the latter operate with a boiler having biofuels. The invention consists in conveying a portion of the thermal energy with the aid of liquid circuits. The heat is diffused into the grain via thermal box structures equipped with bundles of pipes 2 for circulation of hot water. These thermal box structures are arranged alternately with the drying compartments which diffuse the hot air via their dihedral sheaths. The compartments and the thermal box structures as a whole constitute the drying column.

Description

L'invention est du domaine du séchage des grains ; elle peut s'appliquer au séchage d'autres produits granuleux. Elle concerne un dispositif s'adaptant sur les séchoirs a céréales pour véhiculer l'énergie thermique sous forme liquide, ceci pour renforcer l'action de séchage produite par l'air chaud qui traverse le grain. The invention is in the field of grain drying; it can be applied to the drying of other granular products. It relates to a device which is adapted to grain dryers to convey thermal energy in liquid form, this in order to reinforce the drying action produced by the hot air which passes through the grain.

Les séchoirs classiques utilisent comme combustibles soit le fueil, soit la gaz en phase Liquide ou gazeuse. En général, avec quelques variantes de disposition, ces séchoirs se composent 1") D'un générateur d'air chaud. soit direct, soit avec échangeur. Conventional dryers use either fuels or liquid or gaseous gas as fuel. In general, with some layout variants, these dryers consist of 1 ") A hot air generator, either direct or with exchanger.

2") D'une colonne de séchage composée de cases ou cellules de type modulaire (A) perforées de gaines où circule l'air chaud, disposées les unes au dessus des autres et traversées par le grain qui descend par gravité. 2 ") A drying column made up of modular boxes or cells (A) perforated with ducts where hot air circulates, arranged one above the other and crossed by the grain which descends by gravity.

3 ) D:une cheminée caisson (C) d'air chaud qui est accolée latéralement a la colonne et diffuse l'air chaud dans toutes les cellules pour traverser le grain. 3) D: a box chimney (C) of hot air which is attached laterally to the column and diffuses the hot air in all the cells to pass through the grain.

4 ) D'une autre cheminée caisson (D) a l'opposé de la première, qui récupère l'air saturé, chargé de buées, lequel est rejeté à l'extérieur généralement par un ventilateur (E). 4) Another box chimney (D) opposite the first, which collects the saturated air, laden with mist, which is generally rejected outside by a fan (E).

Le renchérissement des combustibies classiques a conduit certains constructeurs, dans le cadre des économies d'energie, à faire fonctionner des séchoirs classiques, tel que décrit ci-dessus, avec des genérateurs alimentés avec des combustibles solides, d'origine végétale : bois, paille, rafles de mais, ce dernier combustible s'avérant le plus économique et intéressant. The increase in the cost of conventional combustibles has led certain manufacturers, in the context of energy savings, to operate conventional dryers, as described above, with generators supplied with solid fuels, of vegetable origin: wood, straw , corn roundups, the latter fuel proving to be the most economical and interesting.

Dans ce cas, et surtout s'il s'agit d'unités modestes de type fermier, la difficulté maieure réside dans ie fait que l'air chaud produit par le générateur avec échangeur, version biomasse, est d'une température insuffisante pour procurer un rendement de séchage intéressant. In this case, and especially in the case of modest farm-type units, the main difficulty lies in the fact that the hot air produced by the generator with exchanger, biomass version, is of a temperature insufficient to provide an interesting drying yield.

L'invention proposée permet de remédier à cet inconvénient, en permettant de véhiculer l'énergie thermique produite par une chaudière générateur, non seulement sans forme d'air chaud selon le processus classique décrit ci-dessus, mais aussi et surtout, sous une forme liquide. The proposed invention overcomes this drawback, by allowing the thermal energy produced by a generator boiler to be conveyed, not only without the form of hot air according to the conventional process described above, but also and above all, in a form liquid.

L'accélération de la déshydratation du grain sera produite par la présence dans la colonne sécheuse de caiss-ons thermiques (BJ.  The acceleration of grain dehydration will be produced by the presence in the dryer column of thermal boxes (BJ.

Un caisson thermique est formé par quatre flancs de tôle raidie dont les dimensions en long et en large serunt celles des cases de séchage, du séchoir considéré. Ces quatre flancs composent une enveloppe (I) a l'intérieur de laquelle sont disposés deux rangées superposées de tuyaux de type chauffage (2) lesquels tuyaux laissent entre eux des espaces suffisants pour le passage du grain. Ces tuyaux sont raccordés à l'une de ieur extrémité, sur un tuyau d'aii mentation (nourrice) (3) et à l'autre extrémité sur un tuyau retour (4). A thermal box is formed by four sides of stiffened sheet metal, the long and wide dimensions of which are those of the drying boxes of the dryer in question. These four sides make up an envelope (I) inside which are arranged two superimposed rows of heating type pipes (2) which pipes leave between them sufficient spaces for the passage of the grain. These pipes are connected at one end, to a supply pipe (nurse) (3) and at the other end to a return pipe (4).

Le caisson thermique est, en résumé, un-gros radiateur d circulation d'eau à plat, et fonctionnant comme tel. Le faisceau de tuyaux immergé dans le grain provoque son réchauffage et contribue de façon importante à ia dessication de ce dernier. Les caissons thermiques (B) sont disposée en ordre alterné avec les cellules sécheuses (A) et l'ensemble constitue la colonne de séchage.Cet ordre sera le suivant
On commencera toujours à la base, juste au-dessus du dispositif extracteur de grains, par un caisson thermique, sur lequel viendra une cellule sécheuse, et ainsi de suite jusqu'au sommet, pour terminer toujours par deux caissons thermiques accolés l'un à l'autre, ceci pour mettre le grain humide rapidement en température. -
Le nombre du cellules sécheuses sera variable selon le modèle de séchoir mais jamais inférieur à cinq, et le nombre de. caissons thermiques sera toujours supérieur de deux au nombre de cellules, puisque la colonne est toujours composée d'un caisson au départ et de deux au sommet.The thermal box is, in short, a large flat water circulation radiator, and functioning as such. The bundle of pipes immersed in the grain causes it to heat up and contributes significantly to the drying of the latter. The thermal boxes (B) are arranged in alternating order with the dryer cells (A) and the assembly constitutes the drying column. This order will be as follows
We will always start at the bottom, just above the grain extractor device, with a thermal box, on which a dryer cell will come, and so on to the top, always ending with two thermal boxes attached to each other. the other, this to bring the wet grain quickly to temperature. -
The number of dryer cells will vary depending on the dryer model, but never less than five, and the number of. thermal boxes will always be two greater than the number of cells, since the column is always composed of one box at the start and two at the top.

Avec un séchoir agencé de cette façon le grain parviendra au dispositif extracteur non refroidi et sera en condition pour l'application du refroidissement lent différé appelé dryération. With a dryer arranged in this way the grain will reach the uncooled extractor device and will be in condition for the application of delayed slow cooling called dryeration.

La chaudière qui pourra être de différente conception ou marque, sera du type chauffage dtimmeuble avec production d'eau chaude par lame, ou anneau d'eau, avec un départ et un retour. Son système d'alimentation sera soit manuel, soit automatique, et son foyer sera conçu pour brûler des combustibles solides, d'origine végétale (bois,sciure, rafles de maïs, paille, etc..). The boiler, which may be of different design or brand, will be of the building heating type with hot water produced by a blade, or a water ring, with a flow and return. Its feeding system will be either manual or automatic, and its fireplace will be designed to burn solid fuels, of vegetable origin (wood, sawdust, corn cobs, straw, etc.).

La chaudière en elle-meme n'aura pas de parois calorifugées, mais elle sera recouverte dnas son ensemble par un carrelage en tôle, à double parois calorifugée, distant d'environ 30 centimètres des parois chauffantes. L'air chaud dégagé par la chaudière et qui se trouvera emprisonné à l'intérieur du carrénage sera aspiré par un ventilateur-turbine, pour être pulsé dans le caisson d'air chaud du séchoir (C). The boiler itself will not have any heat-insulated walls, but it will be covered in its entirety by a sheet metal tiling, with double heat-insulated walls, about 30 cm away from the heating walls. The hot air released by the boiler and which will be trapped inside the casing will be sucked in by a fan-turbine, to be blown into the hot air box of the dryer (C).

Eu résumé, on a donc une chaudière à circulation d'eau, qui est également un générateur d'air chaud. Une tuyauterie adéquate sera posée pour relier cette production d'eau chaude de la chaudière, aux caissons thermiques. In summary, we therefore have a water circulation boiler, which is also a generator of hot air. Adequate piping will be laid to connect this hot water production from the boiler to the thermal boxes.

Pour ce faire, le tuyau départ montera à l'intérieur du caisson d'air chaud ; au passage, il desservira chacun des caissons thermiques par un T suivi d'un raccord union, de la même façon que l'on raccorde un radiateur de ehauffage central d'appartement ; au sommet de la colonue le dernier caisson-thermique sera surmonté d'un vase d'exPansion à l'air libre (6).  To do this, the flow pipe will go up inside the hot air box; on the way, it will serve each of the thermal boxes with a T followed by a union connection, in the same way as one connects a central apartment heating radiator; at the top of the tower the last thermal box will be surmounted by an expansion tank in the open air (6).

Le retour d'eau en chaudière sera fait de la même manière ; au cours de sa descente dans le caisson d'air chaud, le tuyau seïa relié successivement à la tuyauterie de la base de chacun des caissons thermiques. Ces deux tuyaux, alimentation et retour, seront calorifugés dans la partie comprise entre la chaudière et le séchoir.The return of water to the boiler will be done in the same way; during its descent into the hot air box, the pipe is connected successively to the piping of the base of each of the thermal boxes. These two pipes, supply and return, will be insulated in the part between the boiler and the dryer.

Normalement la circulation d'eau s'effectuera selon l'effet thermo-siphon. Normally the water circulation will take place according to the thermo-siphon effect.

Pour une circulation accélérée, ou si l'installation comporte des différences de niveaux, un circulateur dieau pourra être monté sur le tuyau retour.For accelerated circulation, or if the installation has differences in levels, a water circulator can be mounted on the return pipe.

La figure a représente en coupe un caisson thermique. Figure a shows in section a thermal box.

La figure 2 Leprésente une case de séchage classique avec ses gaines. Figure 2 shows a classic drying box with its sheaths.

La figure 3 montre la disposition alternée des cases de séchage (A) et des caissons thermiques (B) dans un séchoir selon l'invention.  Figure 3 shows the alternate arrangement of drying boxes (A) and thermal boxes (B) in a dryer according to the invention.

Claims (1)

- REVENDICATION  - CLAIM Dispositif accélérateur de déshydratation adaptable sur séchoir à céréales de type continu, fonctionnant avec chaudière biocombustibles, caractérisé en ce qu'il comporte des caissons thermiques (B) disposés dans la colonne de sechage en ordre alterné avec les cellules sécheuses a air chaud (A). Dehydration accelerator device adaptable to a continuous type grain dryer, operating with a biofuel boiler, characterized in that it comprises thermal chambers (B) arranged in the drying column in alternating order with the hot air dryer cells (A) . Ces caissons thermiques. constitués d'une enveloppe métallique (I) a l'intérieur de laquelle est disposé un faisceau de tuyaux (2) a circulation d'eau chaude, ont pour effet de diffuser dans le grain lténergie thermique prouuiLe par la chaudière à biocombustibles, énergie qui se trouve ainsi vehiculée depuis la chaudière sous forme liquide.  These thermal boxes. consisting of a metal casing (I) inside which is disposed a bundle of pipes (2) for circulation of hot water, have the effect of diffusing in the grain lt thermal energy produced by the biofuel boiler, energy which is thus transported from the boiler in liquid form.
FR8301410A 1983-01-26 1983-01-26 Dehydration accelerator which can be fitted on a cereal drier operating with a boiler having biofuels Withdrawn FR2539586A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8301410A FR2539586A1 (en) 1983-01-26 1983-01-26 Dehydration accelerator which can be fitted on a cereal drier operating with a boiler having biofuels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8301410A FR2539586A1 (en) 1983-01-26 1983-01-26 Dehydration accelerator which can be fitted on a cereal drier operating with a boiler having biofuels

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FR2539586A1 true FR2539586A1 (en) 1984-07-27

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2646749A1 (en) * 1989-05-11 1990-11-16 Delmas Calixte Modular grain drier
EP0407278A1 (en) * 1989-07-06 1991-01-09 François Laurenty Tower for granular products
CN110325626A (en) * 2017-01-24 2019-10-11 皇冠制铁公司 The vertical seed regulator heating part of modularization
CN111023786A (en) * 2019-12-09 2020-04-17 湖南省农友机械集团有限公司 Drying machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2646749A1 (en) * 1989-05-11 1990-11-16 Delmas Calixte Modular grain drier
EP0407278A1 (en) * 1989-07-06 1991-01-09 François Laurenty Tower for granular products
FR2652153A1 (en) * 1989-07-06 1991-03-22 Laurenty Francois METHOD AND DRYING TOWER OF GRAIN PRODUCTS.
US5111596A (en) * 1989-07-06 1992-05-12 Francois Laurenty Drying process and tower for products in grain form
CN110325626A (en) * 2017-01-24 2019-10-11 皇冠制铁公司 The vertical seed regulator heating part of modularization
EP3574065A4 (en) * 2017-01-24 2020-09-23 Crown Iron Works Company Modular vertical seed conditioner heating section
CN111023786A (en) * 2019-12-09 2020-04-17 湖南省农友机械集团有限公司 Drying machine

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