EP0498725A1 - Grain dryer - Google Patents

Grain dryer Download PDF

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Publication number
EP0498725A1
EP0498725A1 EP92400300A EP92400300A EP0498725A1 EP 0498725 A1 EP0498725 A1 EP 0498725A1 EP 92400300 A EP92400300 A EP 92400300A EP 92400300 A EP92400300 A EP 92400300A EP 0498725 A1 EP0498725 A1 EP 0498725A1
Authority
EP
European Patent Office
Prior art keywords
sleeves
air
sheath
sheet
grains
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.)
Withdrawn
Application number
EP92400300A
Other languages
German (de)
French (fr)
Inventor
Claude Blandin
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.)
Satig SA
Original Assignee
Satig SA
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 Satig SA filed Critical Satig SA
Publication of EP0498725A1 publication Critical patent/EP0498725A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F26B17/14—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 moving through a counter-current of gas
    • F26B17/1408—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 moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material
    • F26B17/1416—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 moving through a counter-current of gas the gas being supplied and optionally extracted through ducts extending into the moving stack of material the ducts being half open or perforated and arranged horizontally

Definitions

  • the present invention relates to a continuous grain dryer of the type in which the wet grains are introduced in the upper part to come out dry in the lower part and which comprises embedded in the mass of grains of the open sheaths arranged in rows and connected to one another. hot air and the like to a humid air exhaust duct.
  • the sleeves are staggered; most often they are open at their lower part and dihedral in the upper part.
  • the present invention relates to an improved grain dryer so as to limit overheating and to homogenize the drying of the grains.
  • This dryer is characterized in that the upper part of the side walls of the sleeves has holes or perforations and in that each sleeve is divided by a sheet metal into two spaces, one of which is connected to a source of hot air while the the other is connected to a waste air outlet.
  • the dryer according to the invention consists of a vertical enclosure 1 which is provided, at its upper part, with a loading opening 2 and, at its lower part, with unloading hoppers 3 .
  • the enclosure 1 comprises, over its entire height, horizontal sleeves 4 but may have so-called bleeding zones such as 5 a and 5 b , which do not contain sleeves.
  • the sleeves 4 are open at their lower part and have sloping side walls forming a dihedral. They are staggered.
  • each sheath is divided into two spaces 6 and 7 by a solid sheet 8 disposed obliquely at one of its ends, the sheet is located at the base of the sheath while, at its other end, it is substantially at the base of the perforated parts 5 of the side walls.
  • the sleeves are open at their two ends, the upper spaces 6 being connected to a source of hot air while the lower spaces 7 are connected, at the opposite end of the sleeve, to a waste air discharge duct.
  • the spaces 6 are closed at their end opposite to that where the hot air enters.
  • the hot air enters the sheaths 4, as indicated by the arrow f 1 , and is distributed in the spaces 6 from which it exits through the perforated parts 5.
  • Part of this air passes vertically through the grain and penetrates , as indicated by the arrows f 2 in the spaces 7 of the sleeves situated above and from which it exits on the side of the dryer opposite to that where the hot air is connected, as indicated by the arrow f 3 .
  • Another part of the air which exits through the perforated parts 5 of a sheath envelops this sheath and enters space 7, as indicated by arrow f 4 , by the base of the sheath.
  • Hot air can be introduced into the lower part of the sleeves and exit through the upper part through the perforated sheet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Grain dryer, into which the moist grains are introduced in the upper part to emerge dry in the lower part and which comprises, buried in the mass of grains, open sleeves (4) arranged in rows and connected in some cases to a hot-air source and in others to a moist-air exhaust pipe. The upper part (5) of the lateral walls of the sleeves comprises holes or perforations and each sleeve is divided by a sheet (8) into two spaces (6 and 7), one of which is connected to a hot-air source while the other is connected to a spent-air exhaust. <IMAGE>

Description

La présente invention concerne un séchoir à grains continu du type dans lequel les grains humides sont introduits en partie supérieure pour ressortir secs en partie inférieure et qui comporte noyés dans la masse de grains des fourreaux ouverts disposés en rangées et reliés les uns à une source d'air chaud et les autres à un conduit d'évacuation d'air humide. Les fourreaux sont disposés en quinconce; le plus souvent ils sont ouverts à leur partie inférieure et en forme de dièdre à leur partie supérieure.The present invention relates to a continuous grain dryer of the type in which the wet grains are introduced in the upper part to come out dry in the lower part and which comprises embedded in the mass of grains of the open sheaths arranged in rows and connected to one another. hot air and the like to a humid air exhaust duct. The sleeves are staggered; most often they are open at their lower part and dihedral in the upper part.

Dans les séchoirs de ce type on rencontre souvent des problèmes dans l'écoulement de l'air qui a tendance à surchauffer les grainns dans des tranches verticales, lorsque les rangées horizontales de fourreaux sont alternées rangée par rangée, ou dans des tranches horizontales lorsque ces rangées sont alternées par bloc de deux rangées.In driers of this type there are often problems in the flow of air which tends to overheat the grainns in vertical slices, when the horizontal rows of sleeves are alternated row by row, or in horizontal slices when these rows are alternated in blocks of two rows.

La présente invention a pour objet un séchoir à grains perfectionné de manière à limiter la surchauffe et à homogénéiser le séchage des grains.The present invention relates to an improved grain dryer so as to limit overheating and to homogenize the drying of the grains.

Ce séchoir est caractérisé en ce que la partie supérieure des parois latérales des fourreaux comporte des trous ou perforations et en ce que chaque fourreau est divisé par une tôle en deux espaces dont l'un est relié à une source d'air chaud alors que l'autre est relié à une évacuation d'air usé.This dryer is characterized in that the upper part of the side walls of the sleeves has holes or perforations and in that each sleeve is divided by a sheet metal into two spaces, one of which is connected to a source of hot air while the the other is connected to a waste air outlet.

On a décrit ci-après, à titre d'exemple non limitatif, un mode de réalisation du séchoir selon l'invention, avec référence au dessin annexé dans lequel :

  • La Figure 1 est une vue en coupe schématique du séchoir;
  • La Figure 2 est une vue en perspective d'un détail montrant deux fourreaux superposés;
  • La Figure 3 est un schéma montrant la circulation de l'air.
An embodiment of the dryer according to the invention has been described below, by way of nonlimiting example, with reference to the appended drawing in which:
  • Figure 1 is a schematic sectional view of the dryer;
  • Figure 2 is a perspective view of a detail showing two superimposed sleeves;
  • Figure 3 is a diagram showing the air circulation.

Tel qu'il est représenté au dessin, le séchoir selon l'invention est constitué par une enceinte verticale 1 qui est munie, à sa partie supérieure, d'une ouverture de chargement 2 et, à sa partie inférieure, de trémies de déchargement 3.As shown in the drawing, the dryer according to the invention consists of a vertical enclosure 1 which is provided, at its upper part, with a loading opening 2 and, at its lower part, with unloading hoppers 3 .

L'enceinte 1 comporte, sur toute sa hauteur, des fourreaux horizontaux 4 mais peut présenter des zones dites de ressuage telles que 5a et 5b, qui ne contiennent pas de fourreaux.The enclosure 1 comprises, over its entire height, horizontal sleeves 4 but may have so-called bleeding zones such as 5 a and 5 b , which do not contain sleeves.

Les fourreaux 4 sont ouverts à leur partie inférieure et présentent des parois latérales en pente formant dièdre. Ils sont disposés en quinconce.The sleeves 4 are open at their lower part and have sloping side walls forming a dihedral. They are staggered.

Comme on le voit à la Figure 2, la partie supérieure 5 des parois latérales d'un fourreau est constituée par un grillage ou de la tôle perforée ou bien est agencée d'une autre manière pour laisser circuler l'air tout en retenant des grains. Par ailleurs, chaque fourreau est divisé en deux espaces 6 et 7 par une tôle pleine 8 disposée obliquement à l'une de ses extrémités, la tôle se trouve à la base du fourreau alors que, à son autre extrémité, elle se trouve sensiblement à la base des parties perforées 5 des parois latérales. Les fourreaux sont ouverts à leurs deux extrémités les espaces supérieurs 6 étant reliés à une source d'air chaud alors que les espaces inférieurs 7 sont reliés, à l'extrémité opposée du fourreau, à un conduit d'évacuation d'air usé. Les espaces 6 sont fermés à leur extrémité opposée à celle où entre l'air chaud.As seen in Figure 2, the upper part 5 of the side walls of a sheath is formed by a mesh or perforated sheet or is arranged in another way to let air circulate while retaining grains . Furthermore, each sheath is divided into two spaces 6 and 7 by a solid sheet 8 disposed obliquely at one of its ends, the sheet is located at the base of the sheath while, at its other end, it is substantially at the base of the perforated parts 5 of the side walls. The sleeves are open at their two ends, the upper spaces 6 being connected to a source of hot air while the lower spaces 7 are connected, at the opposite end of the sleeve, to a waste air discharge duct. The spaces 6 are closed at their end opposite to that where the hot air enters.

En fonctionnement, l'air chaud pénètre dans les fourreaux 4, comme indiqué par la flèche f1, et se répartit dans les espaces 6 d'où il sort par les parties perforées 5. Une partie de cet air traverse verticalement le grain et pénètre, comme indiqué par les flèches f2 dans les espaces 7 des fourreaux situés au-dessus et d'où il sort du côté du séchoir opposé à celui où est relié l'air chaud, comme indiqué par la flèche f3. Une autre partie de l'air qui sort par les parties perforées 5 d'un fourreau enveloppe ce fourreau et pénètre dans l'espace 7, comme indiqué par la flèche f4, par la base du fourreau.In operation, the hot air enters the sheaths 4, as indicated by the arrow f 1 , and is distributed in the spaces 6 from which it exits through the perforated parts 5. Part of this air passes vertically through the grain and penetrates , as indicated by the arrows f 2 in the spaces 7 of the sleeves situated above and from which it exits on the side of the dryer opposite to that where the hot air is connected, as indicated by the arrow f 3 . Another part of the air which exits through the perforated parts 5 of a sheath envelops this sheath and enters space 7, as indicated by arrow f 4 , by the base of the sheath.

La disposition des entrées et des sorties d'ai usé peut être inversée par rapport à l'exemple décrit ci-dessus. L'air chaud peut être introduit à la partie basse des fourreaux et ressortir par la partie supérieure au travers de la tôle perforée.The layout of the waste air inlets and outlets can be reversed from the example described above. Hot air can be introduced into the lower part of the sleeves and exit through the upper part through the perforated sheet.

Claims (3)

Séchoir à grains, dans lequel les grains humides sont introduits en partie supérieure pour ressortir secs en partie inférieure et qui comporte noyés dans la masse de grains des fourreaux (4) ouverts disposés en rangées et reliés les uns à une source d'air chaud et les autres à un conduit d'évacuation d'air humide,
caractérisé en ce que la partie supérieure (5) des parois latérales des fourreaux comporte des trous ou perforations et
en ce que chaque fourreau est divisé par une tôle (8) en deux espaces (6 et 7) dont l'un est relié à une source d'air chaud alors que l'autre est relié à une évacuation d'air usé.Grain dryer, in which the moist grains are introduced in the upper part to come out dry in the lower part and which comprises embedded in the mass of grains of the sheaths (4) open arranged in rows and connected to one another a source of hot air and the others to a humid air exhaust duct,
characterized in that the upper part (5) of the side walls of the sleeves has holes or perforations and
in that each sheath is divided by a sheet (8) into two spaces (6 and 7), one of which is connected to a source of hot air while the other is connected to a discharge of used air. Séchoir selon la revendication 1,
caractérisé en ce que la tôle (8) est disposée obliquement.Dryer according to claim 1,
characterized in that the sheet (8) is arranged obliquely. Séchoir selon la revendication 2,
caractérisé en ce que la tôle (8) se trouve à l'une de ses extrémités à la base du fourreau et, à son extrémité opposée, sensiblement à la base des parties perforées (5) des parois latérales de ce fourreau.Dryer according to claim 2,
characterized in that the sheet (8) is located at one of its ends at the base of the sheath and, at its opposite end, substantially at the base of the perforated parts (5) of the side walls of this sheath.
EP92400300A 1991-02-06 1992-02-05 Grain dryer Withdrawn EP0498725A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9101702A FR2672377A1 (en) 1991-02-06 1991-02-06 GRAIN DRYER.
FR9101702 1991-02-06

Publications (1)

Publication Number Publication Date
EP0498725A1 true EP0498725A1 (en) 1992-08-12

Family

ID=9409680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400300A Withdrawn EP0498725A1 (en) 1991-02-06 1992-02-05 Grain dryer

Country Status (5)

Country Link
EP (1) EP0498725A1 (en)
CS (1) CS32292A3 (en)
FR (1) FR2672377A1 (en)
HU (1) HUT67337A (en)
PL (1) PL293396A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014200A1 (en) * 1993-11-16 1995-05-26 Knoll Anlagenbau Gmbh Drying plant for cereals, maize and other granular products
NL1017343C2 (en) * 2001-02-12 2002-08-13 Holding Dinnissen B V Device suitable for drying bulk material.
WO2008047194A1 (en) * 2006-10-15 2008-04-24 Budzinski, Dariusz Draying column

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR25343E (en) * 1921-09-03 1923-01-24 Continuous automatic grain dryer
GB1172522A (en) * 1966-01-28 1969-12-03 Ransomes Sims & Jefferies Ltd Improvements in or relating to Apparatus for the Drying of Grain or other Granular Material
US3913242A (en) * 1974-09-11 1975-10-21 Gear Co M W Preheater for grain dryer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR25343E (en) * 1921-09-03 1923-01-24 Continuous automatic grain dryer
GB1172522A (en) * 1966-01-28 1969-12-03 Ransomes Sims & Jefferies Ltd Improvements in or relating to Apparatus for the Drying of Grain or other Granular Material
US3913242A (en) * 1974-09-11 1975-10-21 Gear Co M W Preheater for grain dryer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CONSERVA vol. 8, Juin 1960, LA HAYE pages 323 - 355; KREYGER, J.: 'invloed van de luchttemperatuur op de kwaliteit van gedroogd graan' *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014200A1 (en) * 1993-11-16 1995-05-26 Knoll Anlagenbau Gmbh Drying plant for cereals, maize and other granular products
NL1017343C2 (en) * 2001-02-12 2002-08-13 Holding Dinnissen B V Device suitable for drying bulk material.
EP1231441A1 (en) * 2001-02-12 2002-08-14 Holding Dinnissen B.V. A device suitable for drying bulk goods
WO2008047194A1 (en) * 2006-10-15 2008-04-24 Budzinski, Dariusz Draying column

Also Published As

Publication number Publication date
HUT67337A (en) 1995-03-28
PL293396A1 (en) 1992-10-19
CS32292A3 (en) 1992-10-14
FR2672377A1 (en) 1992-08-07
HU9200356D0 (en) 1992-04-28

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