WO2005080895A1 - Dispositif de sechage avec ventilation pour la canalisation d'air chaud - Google Patents

Dispositif de sechage avec ventilation pour la canalisation d'air chaud Download PDF

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Publication number
WO2005080895A1
WO2005080895A1 PCT/DE2005/000286 DE2005000286W WO2005080895A1 WO 2005080895 A1 WO2005080895 A1 WO 2005080895A1 DE 2005000286 W DE2005000286 W DE 2005000286W WO 2005080895 A1 WO2005080895 A1 WO 2005080895A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
drying
roof
supply
roofs
Prior art date
Application number
PCT/DE2005/000286
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Knoop
Original Assignee
Riela-Getreidetechnik
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
Priority claimed from DE202004002640U external-priority patent/DE202004002640U1/de
Application filed by Riela-Getreidetechnik filed Critical Riela-Getreidetechnik
Publication of WO2005080895A1 publication Critical patent/WO2005080895A1/fr

Links

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

  • each drying level can be configured uniformly in itself, with supply or exhaust air roofs aligned one above the other.
  • Fig. 3 on a larger scale than Fig. 2 shows a vertical section through some drying levels arranged one above the other.
  • a drying device 21 which has a central shaft or silo-like drying column 22, in which the material to be dried is guided from top to bottom through several areas designated as “elements” or as “levels”.
  • Several drying levels 3 and 4, 6 to 11, and 13 and 14 are provided within the drying column 22, as well as two cooling levels 1 and 2, directly above a product discharge 23, in which the drying material is flowed through by cooling air introduced from outside (in the drawing a cooling air inlet 24 is shown on the right).
  • the cooling air heated by the material to be dried reaches (in the drawing to the left of the drying column 22) a warm air hood 25.
  • this first warm air duct 26 can also be partially or completely closed by a throttle valve 27 that this proportion of warm air can be set with the maximum air temperature.
  • Warm air duct 29 as a flow path for mixed air with a reduced temperature.
  • the warm air duct 29 has a constriction 30 which is configured as a Venturi nozzle by means of obliquely arranged air baffle plates.
  • the constriction 30 represents on the one hand a flow resistance for the warm air, on the other hand accelerates the warm air in the warm air duct 29 and thirdly causes a pressure drop downstream of the nozzle.
  • the cooling air passed through the two cooling levels 1 and 2 is sucked into the warm air duct 29 by this pressure difference, so that air mixing and thus temperature compensation takes place here.
  • a particularly reliable possibility of mixing cold and warm air is achieved when the flow resistance for the warm air formed by the Venturi nozzle is approximately as large as the flow resistance that the drying material offers for the cooling air flowing through the drying material.
  • a mixing temperature of approximately 120 ° is achieved in this way, this mixing temperature being used in drying levels 6 to 10.
  • Partition plate 31 provided with an adjustable control flap 32, which is closed in the drawing, but which can be opened alternately with the throttle valve 27 in the left warm air shaft 26 if necessary. With this changeover, the drying device 21 is set to a temperature for the entire dryer column 22.
  • a "sweating zone” or “homogenization zone” is provided in each of levels 5 and 12. These two levels 5 and 12 serve to homogenize the temperature profile within the individual constituents of the material to be dried, for example within the individual cereal grains, if the drying device 21 is used as a grain dryer. Basically, the drying device 21 for granules, in particular cereals, such as. B. cereals, corn, rape or sunflowers are provided.
  • the material to be dried is overheated, that is to say a temperature is applied, which leads to a rise in temperature in the edge regions of the individual grains without this temperature level also being reached in the core region of the grains.
  • the homogenization zones 5 and 12 in which no additional temperature exposure of the material to be dried is provided, in each case enable improved moisture release, since here the
  • Dried goods are given the opportunity to assume a homogeneous temperature and moisture level within the individual grains, that is, to enable a temperature adjustment to the core of the individual grains, with simultaneous moisture transmission to the grain surface.
  • the material to be dried is again given the opportunity to create an even temperature distribution within the individual grains and a more intensive moisture transport from the grain to let the inside take place in the edge area without additional temperature exposure and stress.
  • FIG. 3 shows a vertical section through drying levels arranged one above the other on an enlarged scale compared to FIGS. 1 and 2.
  • Air ducts with an approximately roof-like or house-like cross section are shown. These air ducts extend over the entire width of the individual drying elements in the silo-like drying column 22 of the drying device 21.
  • So-called supply air roofs 33 are identified with a plus sign and exhaust air roofs 34 are identified with a minus sign, the supply air and exhaust air roofs 33 , 34 are each open at the bottom to allow the air outlet at the supply air roofs 33 and the air entry at the exhaust air roofs 34 on this underside, while the drying material flowing from top to bottom flows around these supply air and exhaust air roofs 33, 34.
  • a so-called air change takes place at the boundary between the two middle drying levels shown in FIG. 3: both above and below this air change limit, the supply air roofs 33 and the exhaust air roofs 34 are each arranged vertically aligned one above the other.
  • the supply air roofs 33 arranged above this limit are not provided above the supply air roofs 33 of the lower level, but rather above the exhaust air roofs 34 of the lower level. In this way, a more uniform application of warm air to the drying material and thus a drying result that is distributed as homogeneously as possible within the drying material and thus a uniform, homogeneous drying result is achieved.

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

Abstract

L'invention concerne un dispositif de séchage (21), tel qu'un séchoir à céréales, comprenant une colonne de séchage (22) de type cheminée ou silo, dans laquelle le produit à sécher passe de haut en bas, cette colonne de séchage (22) comportant plusieurs niveaux de séchage (3, 4, 6-11, 13, 14) superposés. La colonne de séchage (22) est traversée transversalement par des canalisations d'air de deux types différents, nommés couvertures d'entrée d'air et couvertures de sortie d'air. L'invention est caractérisée en ce que le dispositif est doté d'une ventilation conçue de telle sorte qu'en alignement vertical, un type de canalisation d'air (couverture d'entrée d'air (33)) est disposé sur un autre un type de canalisation d'air (couverture de sortie d'air (34))
PCT/DE2005/000286 2004-02-20 2005-02-18 Dispositif de sechage avec ventilation pour la canalisation d'air chaud WO2005080895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004002640U DE202004002640U1 (de) 2003-11-07 2004-02-20 Trocknungsvorrichtung mit Luftwechsel bei der Warmluftführung
DE202004002640.6 2004-02-20

Publications (1)

Publication Number Publication Date
WO2005080895A1 true WO2005080895A1 (fr) 2005-09-01

Family

ID=34877786

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2005/000286 WO2005080895A1 (fr) 2004-02-20 2005-02-18 Dispositif de sechage avec ventilation pour la canalisation d'air chaud

Country Status (1)

Country Link
WO (1) WO2005080895A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897148A1 (fr) * 2006-02-09 2007-08-10 Procedes Roland Pigeon Soc Par Dispositif et procede de sechage de granules a base de poudre et de liant
WO2008047194A1 (fr) * 2006-10-15 2008-04-24 Budzinski, Dariusz Colonne de séchage
WO2008047196A2 (fr) * 2006-10-15 2008-04-24 Budzinski, Dariusz Procédé de déshydratation de lignite ou charbon et unité permettant la mise en oeuvre du procédé de déshydratation de lignite ou charbon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2346964A1 (fr) * 1976-04-05 1977-11-04 Baudot Hubert Sechoir a grains
DE3100614A1 (de) * 1980-03-17 1981-11-19 Satake Engineering Co. Ltd., Tokyo Waermebehandlungsvorrichtung fuer koerniges gut
FR2646749A1 (fr) * 1989-05-11 1990-11-16 Delmas Calixte Sechoir a grains modulaire
WO2005022979A2 (fr) * 2003-09-02 2005-03-17 Riela-Getreidetechnik Dispositif de sechage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2346964A1 (fr) * 1976-04-05 1977-11-04 Baudot Hubert Sechoir a grains
DE3100614A1 (de) * 1980-03-17 1981-11-19 Satake Engineering Co. Ltd., Tokyo Waermebehandlungsvorrichtung fuer koerniges gut
FR2646749A1 (fr) * 1989-05-11 1990-11-16 Delmas Calixte Sechoir a grains modulaire
WO2005022979A2 (fr) * 2003-09-02 2005-03-17 Riela-Getreidetechnik Dispositif de sechage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897148A1 (fr) * 2006-02-09 2007-08-10 Procedes Roland Pigeon Soc Par Dispositif et procede de sechage de granules a base de poudre et de liant
EP1818636A1 (fr) * 2006-02-09 2007-08-15 Procédés Roland Pigeon Dispositif et procédé de séchage de granules à base de poudre et de liant
WO2008047194A1 (fr) * 2006-10-15 2008-04-24 Budzinski, Dariusz Colonne de séchage
WO2008047196A2 (fr) * 2006-10-15 2008-04-24 Budzinski, Dariusz Procédé de déshydratation de lignite ou charbon et unité permettant la mise en oeuvre du procédé de déshydratation de lignite ou charbon
WO2008047196A3 (fr) * 2006-10-15 2008-06-12 Budzinski Dariusz Procédé de déshydratation de lignite ou charbon et unité permettant la mise en oeuvre du procédé de déshydratation de lignite ou charbon

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