WO2003025485A1 - Dispositif de traitement et procede de conditionnement de matieres en vrac - Google Patents

Dispositif de traitement et procede de conditionnement de matieres en vrac Download PDF

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Publication number
WO2003025485A1
WO2003025485A1 PCT/CH2001/000561 CH0100561W WO03025485A1 WO 2003025485 A1 WO2003025485 A1 WO 2003025485A1 CH 0100561 W CH0100561 W CH 0100561W WO 03025485 A1 WO03025485 A1 WO 03025485A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
treatment
hollow body
floor
bulk material
Prior art date
Application number
PCT/CH2001/000561
Other languages
German (de)
English (en)
Inventor
Stefan Lescae
Original Assignee
Stefan Lescae
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 Stefan Lescae filed Critical Stefan Lescae
Priority to PCT/CH2001/000561 priority Critical patent/WO2003025485A1/fr
Publication of WO2003025485A1 publication Critical patent/WO2003025485A1/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
    • F26B17/001—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement the material moving down superimposed floors
    • F26B17/002—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement the material moving down superimposed floors with floors which may rotate and turn over as a whole or in part, e.g. around a horizontal axis
    • 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 treatment device according to the preamble of claim 1 and to a method according to the preamble of claim 7 for conditioning bulk material, preferably in the form of granules
  • the term granules is intended to encompass the most diverse types of debris, which are formed by particles.
  • the particles can be cubes or pellets, expanses, agglomerates, grains, plant parts or fibers.
  • the granules exchange heat or energy during production steps or during further processing and / or moisture with a treatment fluid, in particular air, from Often shaped particles have to be dried, cooled and stabilized. To dry, they are treated in an air or gas stream at an elevated temperature. The hot air extracts moisture from the particles and warms them up. Warm particles to cool and stabilize them at a lower temperature, the particles are surrounded by air at a low temperature. The air is heated in accordance with the cooling of the particles.
  • the particles When the particles achieve a uniform and efficient removal of moisture, heating and also cooling with process air To achieve this, all particles must come into contact with the process air as intensely and uniformly as possible.
  • the particles are placed on an air-permeable belt according to the state of the art, in a fluidized state over an air-permeable floor or in the case of gravity-induced movement through a vertical shaft flows through the process air
  • the required treatment time and the size of the treatment area are important process parameters for a desired treatment of the granules.
  • the treatment area should be designed or dimensioned in such a way that the treatment device can be made as compact as possible
  • the treatment device should preferably be able to be constructed in such a way that the bulk material can be fed in continuously and discharged continuously after the treatment.
  • it In order to be able to use the treatment device as versatile as possible, it must be able to be carried out for a large spectrum of granule sizes
  • the belt surface is formed by sheet metal pallets with slots or holes.
  • a shaft dryer is known from GB 137 631, in which several tilting floors are arranged one above the other in the housing.
  • the bulk material enters the housing at the top and is held on the uppermost tilting floor.
  • these are started from The bottom to the top one after the other is opened and closed again, so that the bulk material reaches the bottom and bottom of the bottom and the discharge area
  • a fan blows hot process air above the bottom of the bottom into the housing
  • the process air flows through the bottom and onto it bulk material lying to the upper end of the housing, where it is released to the environment
  • the desired conditioning can not be guaranteed on the individual tipping floor.
  • vertically aligned heating plates are arranged over the tipping floor net, which can be heated with a heating fluid via a pipe system
  • the heat transfer from the heating plates to the bulk material takes place essentially via contact heat on the outer surface of the heating elements.This contact heat does not reach the bulk material homogeneously and leads to uneven drying of
  • the object of the invention is to find a device or a method which has fewer restrictions and thereby opens up new possibilities
  • the direct supply of the process air, or also a special gas, enables a targeted fluidization of the bulk material on the air-permeable floor, even if the floor is not close to the housing wall the process air cannot flow around the floor.
  • the tiltable mounted floors do not have to lie close to the assigned opening edge of the housing.
  • Several tiltable hollow bodies can also be arranged next to each other without them lying close together It is only necessary to ensure perforated sheets that the bulk material cannot pass through gaps between the hollow bodies.
  • the process air inside the hollow bodies cannot escape through gaps between the hollow bodies, it must pass through the air-permeable floor
  • Correspondingly perforated sheets or sieves, in particular woven fabrics, preferably made of wire, are used. It goes without saying that, when using movable floors, support elements can be used which prevent undesirably large downward deflections on a filled floor
  • the bulk material is passed on analogously from below Achieved at the top Between two tipping processes for passing on the bulk material to the hollow body underneath, a treatment cycle takes place on each layer. From the lowest hollow body the bulk material into a discharge area, from which it is preferably continuously required The targeted control of the tilting movement of hollow bodies which are arranged one above the other and in particular also next to one another enables a versatile treatment device which can continuously pick up and release bulk material.
  • the uppermost hollow body is used here preferably as a portioning base on which the bulk material is pretreated immediately after entering the treatment device. This prevents sticking during portioning of sensitive granules.
  • Hot air is required for drying through at least one treatment layer.
  • the layer for the main drying may be above at least one upper treatment layer has a pre-drying carried out with the temperature of the process air for the pre-drying is preferably lower than j enes for the main drying under the lowermost used for the drying treatment position, at least one treatment layer are provided for a Kuhlön discharged by the treatment materials laterally through the housing
  • Air volumes can be collected and discharged in a common exhaust air duct.
  • This exhaust air duct can also be used as a separator for separating particles and include a collection and discharge device at the lower end.
  • the bulk material from at least two treatment cycles can be collected via a further hollow body used as a portioning base and then passed on together to the treatment layer underneath and on this be subjected to stabilization treatment for at least two cycles of the preliminary treatment
  • the treatment device enables a modular structure with treatment layers lying one above the other and separate process air feeds.
  • An optimal distribution of the process air in the bulk material can be ensured by the choice of the air flow rate, the desired fluidization can be achieved, with pulsating air being used if necessary, because the conditioning during the given treatment cycles, the residence time is the same for all particles. Due to the essentially identical treatment of all ponds, it can be ensured that the temperature and humidity after the treatment only vary within narrow limits.
  • FIG. 1 shows a vertical longitudinal section through a housing cutout with a tiltably mounted hollow body
  • FIG. 2 shows a vertical cross section through a cutout in the housing with a tiltable hollow body
  • 3 shows a vertical longitudinal section through a housing cutout with four treatment layers formed by tiltable hollow bodies
  • FIG. 5 is a rear view of a treatment device with 10 hollow bodies which are arranged next to one another and can be tilted,
  • FIG. 6 shows a plan view of a treatment device with 10 hollow bodies which are arranged next to one another and can be tilted
  • FIG. 8 shows a schematic illustration of a three-stage treatment of bulk material on six treatment layers
  • Fig. 1 1 is a side view of a system according to Fig. 9, and
  • FIG. 1 and 2 show a section of a treatment device with a shaft-shaped housing 1, in which a hollow body 2 is supported such that it can be tilted about a tilting axis 3.
  • the hollow body 2 comprises an air supply in the form of a half pipe 4 and an air-permeable base 5 which is attached to it the open or concave side of the half pipe is connected to the side lines of the partial pipe running parallel to the tilting axis.
  • the air-permeable bottom is preferably formed by a perforated plate.
  • the hole size and the proportion of holes in the total area are determined according to the bulk material to be treated or the expected minimum particle size. selected For small particles, perforated plates with perforation diameters of, for example, only 0 5 mm can be used.
  • the perforation proportion can be selected in accordance with the desired air throughput, the acceptable flow resistance and the desired flow velocity of the air through the perforators Percentage of holes in a range of 25-75%.
  • narrow hollow bodies 2 are preferably used, so that even with thin perforated sheets no deformation occurs due to the weight of the bulk material.
  • Thin perforated sheets have the advantage that Current resistance of air is not unnecessarily high, even with punches with a small diameter
  • the tilt axis 3 is preferably arranged in the region of the long center line of the perforated plate, so that when the hollow body 2 is tilted, there is no movement of the half pipe against the housing. It would of course be possible to use a partial pipe with a larger diameter instead of the half pipe with the diameter of the perforated plate width or radius of curvature or a profile that runs closer along the perforated plate.
  • a connection opening 9 is formed on at least one end face 7, which connects to a corresponding feed opening 10 of the housing 1
  • a contact disk 11 is on the Inne Arranged on the side of the housing 1, through which the feed opening 10 is formed up to the end face 7.
  • connection opening 9 and the feed opening 10 are preferably each part-shaped, so that an overlap region is also provided in the position of the hollow body 2 which is tilted by 90 ° of the hollow body 2 can be shaped in such a way that it changes from the end face 7 with the connection opening towards the other end face 7 hm, in particular constricted. This can optionally ensure an optimal flow against the perforated plate
  • the tilting of the hollow body 2 is preferably carried out by means of axle parts 12, which are connected to the end faces 7 and are pivotally mounted on the housing 1 via pivot bearings 13. It goes without saying that the axle parts can also be fastened to the housing and connected to the hollow body via pivot bearings Tilting and returning of the hollow body 2, an actuation device is arranged on the housing 1, which comprises a drive element and a transmission device.
  • the movable piston part 14a of a pneumatic cylinder 14 is via a
  • the particle arrangement of the bulk material on the air-permeable soil can be periodically influenced. If, for example, air channels have formed in the bulk material, even a small tilting movement can make these channels disappear.
  • the air passing through the floor then has to find new ways through the Forming debris
  • the mobility of the particles in a stratification above the ground is already increased due to the fluidization with the air passing through the ground, so that the small tilting movements can achieve the desired movements in the stratification.
  • the frequency of the tilting vibration is preferably according to the width , or inertia of the hollow bodies are selected frequencies in the range of 0 1-10 1 / s, or 0 1-10Hz, preferably in the range of 0 5-5Hz, in particular of 1- 3Hz.
  • the mechanical fluidization by the tilting vibration leads to the combination with the fluidization through through the floor air to a uniformizing effect that exceeds the sum of the individual effects.
  • the tilting vibration is particularly advantageous when a layering with heavy particles is evenly massed, which can only be insufficiently fluidized by the rising air even when pulsating air is used more uniform temperature Temperature and moisture exchange and thus a higher quality of the product or particles with essentially the same temperature and humidity
  • 3 and 4 show a treatment device with 4 treatment layers, two tiltable hollow bodies 2 being arranged next to one another and in the housing 1 on each treatment layer in such a way that they can span the interior of the housing and hold back debris in the horizontal position.
  • the controller 20 can thus actuate the actuation devices that the hollow bodies 2 of a lower treatment layer are tilted, reset and then loaded with bulk material 6 by tilting the hollow bodies 2 of the next upper treatment layer.
  • the bulk material is passed on from the bottom to the bottom Topmost treatment layer carried out So that the debris is again distributed as evenly as possible on the air-permeable floor 5 after it has been passed on, these are preferably narrow, in particular in relation to the layer height of the debris, for example twice as wide
  • the fluidization by the process air in particular when using a pulsating air flow, but preferably also the tilting vibration, can contribute to making the layer height more uniform
  • the treatment on the treatment layers takes place in portions, which are gradually passed down completely, a product change can take place during operation.
  • pellets with a diameter of 10 mm are immediately connected, followed by pellets with a diameter of 4 mm treated
  • the different products cannot be mixed. If product mixing is to be completely excluded, it is only necessary to prevent consecutive portions from being brought together during discharge.This can be ensured, for example, by a brief interruption of filling between different products An empty treatment layer is achieved, which results in an interruption in the discharge with the duration of the dwell time on one layer
  • two separate air supply ducts 22 are provided, each of which supplies the hollow bodies of two treatment layers with process air.
  • the process air comes from two air conditioning and drive devices (not shown). This allows process air with different temperatures on the upper two and the lower two treatment layers For example, it is advisable to pre-dry the granulate on the upper two layers at a lower temperature and then carry out a main drying at a higher temperature on the lower two layers.
  • the exhaust air duct preferably a heat exchanger with at least one preheating duct 26.
  • the at least one preheating duct 26 is designed as a supply of air to an air conditioning and auxiliary device and uses the heat of the exhaust air in the exhaust uftschacht 24 for preheating fresh air
  • FIG. 5 to 7 show a treatment layer with a housing 1 and ten hollow bodies 2 arranged side by side, which can be tilted, reset and, if necessary, set in vibration by means of a common actuating device with a pneumatic cylinder 14 and a transmission device.
  • the movable one is movable Piston part 14a of the pneumatic cylinder 14 is connected via a pivot connection to a transmission lever 27.
  • the movement of the transmission lever 27 is transmitted to the axle parts 12 of the hollow parts via a coupling rod 28 and lever 15.
  • Transfer body 2 To actuate the pneumatic cylinder 14 in both directions, the control valve 17 is connected to the pneumatic cylinder 14 via two compressed air lines 18.
  • a viewing opening 29 on the housing 1 is preferably covered with glass -
  • the process air through the feed openings 10 into the hollow body 2, through the air-permeable bottom 5 ms of debris and then through the air outlet opening 23 in two side walls of the housing 1 from the housing 1, preferably into exhaust ducts (not shown) if large debris during treatment Layer thicknesses are provided, it may be expedient to enter additional process air ms bulk material through pipe feed openings 30 and perforated pipes adjoining them inside the housing 1.
  • FIG. 8 illustrates a treatment device for a three-stage treatment of bulk material on six treatment layers. Pre-drying takes place on the top two layers 31, main drying on the middle two layers 32 and cooling on the bottom two layers 33.
  • the top layer preferably serves as a portioning base which the bulk material is pretreated directly after the continuous entry into the treatment device. As a result, sticking during portioning can be prevented in the case of sensitive granules.
  • the process air emerging from the bulk material 6 is discharged laterally from the housing 1 into the exhaust ducts (not shown) in every position
  • the housing 1 is designed as a long vertical treatment shaft with 10 treatment layers for each treatment stage.
  • 6 hollow bodies 2 are arranged side by side.
  • the total treatment tent during which the bulk material is exposed to a treatment step can be selected as a multiple of the dwell time on a layer.
  • This treatment time is the same for all particles because the bulk material is layered falls to position downwards, it is set into a shifting movement several times during a treatment section.
  • the hollow bodies 2 are used to change the layering Tilted alternately in one and the other tilting direction The shifting movement and the optionally provided tilting vibration make it possible to uniformize the treatment of the individual particles without causing excessive abrasion
  • the at least one preheating duct 26 is designed as a supply air supply to a first fan 34 and uses the heat of the exhaust air in the exhaust duct 24 to preheat fresh air.
  • the conditioning devices 35 preferably comprise a gas burner 39 with a third fan 40 for supplying air for the combustion
  • at least one temperature sensor 41 and preferably also an anemometer 42 is arranged and connected to a controller in such a way that the desired amount of air with the desired temperature reaches the respective air supply duct 22.
  • the pulsator 36 turns on of the supplied process air pressure surges can be achieved
  • FIGS. 10 to 12 show how a system according to FIG. 9 can be installed in a building.
  • the two second fans 37 and the inlet device 43 with a rotary valve are arranged.
  • the drive and conditioning devices of the first one The second exhaust device 38 and the first discharge device 44 are shown in section in FIG. 12 so that the preheating ducts 26 arranged therein can be seen

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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 traitement pour conditionner des matières en vrac à l'aide d'air, qui comprend un boîtier (1), au moins un fond (5) perméable à l'air, monté basculant dedans, une ouverture d'introduction de matières en vrac (21), ainsi qu'au moins une ouverture de sortie d'air (23), prévues au-dessus du fond (5) (au moins au nombre de un) et une ouverture de sortie de matières en vrac (25), ainsi qu'au moins une amenée d'air, prévues en dessous dudit fond (5)( au moins au nombre de un). L'amenée d'air (4) est reliée, dans la zone du fond (5) perméable à l'air (au moins au nombre de un), audit fond, de sorte que ledit fond (5) forme conjointement avec l'amenée d'air (4), un corps creux (2) monté basculant. Le corps creux est fermé dans le sens axial, aux deux extrémités, par des parements. Afin de pouvoir alimenter l'intérieur du corps creux en air de traitement, il est prévu une ouverture de raccordement sur un parement. Cette ouverture de raccordement est semi-annulaire et repose sur une ouverture d'alimentation correspondante du boîtier, de sorte qu'y compris lorsque le corps creux se trouve dans une position inclinée à 90°, de l'air de traitement puisse parvenir à l'intérieur du corps creux par l'ouverture d'alimentation et de raccordement. Lorsque le corps creux se trouve aligné de manière que le fond perméable à l'air soit sensiblement horizontal, l'air de traitement peut traverser les matières en vrac sur la tôle perforée et de préférence les fluidifier également. En position inclinée du corps creux, l'air qui sort par la tôle perforée assure une descente par glissement complète et de bonne qualité des matières en vrac.
PCT/CH2001/000561 2001-09-18 2001-09-18 Dispositif de traitement et procede de conditionnement de matieres en vrac WO2003025485A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CH2001/000561 WO2003025485A1 (fr) 2001-09-18 2001-09-18 Dispositif de traitement et procede de conditionnement de matieres en vrac

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2001/000561 WO2003025485A1 (fr) 2001-09-18 2001-09-18 Dispositif de traitement et procede de conditionnement de matieres en vrac

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WO2003025485A1 true WO2003025485A1 (fr) 2003-03-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3057345A1 (fr) * 2016-10-11 2018-04-13 Gerard Heurgue Dispositif de sechage et de refroidissement d'un produit granulaire par flux d'air ascendant

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302706C (fr) *
GB137631A (en) 1919-02-05 1920-01-22 Joergen Joergensen Krueger Improvements in apparatus for drying granular and other substances
US1432270A (en) * 1922-10-17 walsh
US1472314A (en) * 1918-04-27 1923-10-30 Perry & Webster Inc Process of and apparatus for drying and treating materials
GB487256A (en) * 1937-01-30 1938-06-17 Thomas Robinson & Son Ltd Improvements in drying and conditioning machines for cereal grain
US3063848A (en) * 1959-06-01 1962-11-13 Basic Vegets Le Products Inc Fluid treatment for food materials
DE1954617A1 (de) * 1969-10-30 1971-05-19 Claas Maschf Gmbh Geb Durchlauftrockner fuer Korngut,insbesondere fuer Mais
US3604126A (en) * 1970-02-11 1971-09-14 Adams & Whelan Grain treatment apparatus
FR2563327A1 (fr) * 1984-04-24 1985-10-25 Bertin & Cie Installation de sechage de produits par echange de chaleur avec un fluide de sechage
DE3526092A1 (de) * 1984-09-07 1986-03-13 VEB Plastmaschinenwerk Schwerin, DDR-2781 Schwerin Einrichtung zum trocknen von koernigem material
WO1998045655A1 (fr) 1997-04-04 1998-10-15 Geelen Techniek B.V. Procede de fonctionnement d'un dispositif de sechage de meme que dispositif pour executer ce procede

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE302706C (fr) *
US1432270A (en) * 1922-10-17 walsh
US1472314A (en) * 1918-04-27 1923-10-30 Perry & Webster Inc Process of and apparatus for drying and treating materials
GB137631A (en) 1919-02-05 1920-01-22 Joergen Joergensen Krueger Improvements in apparatus for drying granular and other substances
GB487256A (en) * 1937-01-30 1938-06-17 Thomas Robinson & Son Ltd Improvements in drying and conditioning machines for cereal grain
US3063848A (en) * 1959-06-01 1962-11-13 Basic Vegets Le Products Inc Fluid treatment for food materials
DE1954617A1 (de) * 1969-10-30 1971-05-19 Claas Maschf Gmbh Geb Durchlauftrockner fuer Korngut,insbesondere fuer Mais
US3604126A (en) * 1970-02-11 1971-09-14 Adams & Whelan Grain treatment apparatus
FR2563327A1 (fr) * 1984-04-24 1985-10-25 Bertin & Cie Installation de sechage de produits par echange de chaleur avec un fluide de sechage
DE3526092A1 (de) * 1984-09-07 1986-03-13 VEB Plastmaschinenwerk Schwerin, DDR-2781 Schwerin Einrichtung zum trocknen von koernigem material
WO1998045655A1 (fr) 1997-04-04 1998-10-15 Geelen Techniek B.V. Procede de fonctionnement d'un dispositif de sechage de meme que dispositif pour executer ce procede

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3057345A1 (fr) * 2016-10-11 2018-04-13 Gerard Heurgue Dispositif de sechage et de refroidissement d'un produit granulaire par flux d'air ascendant

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