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WO2002030555A1 - Procede et dispositif pour le traitement thermique d'un materiau se presentant sous forme pulverulente ou granulee - Google Patents

Procede et dispositif pour le traitement thermique d'un materiau se presentant sous forme pulverulente ou granulee Download PDF

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Publication number
WO2002030555A1
WO2002030555A1 PCT/EP2001/011684 EP0111684W WO0230555A1 WO 2002030555 A1 WO2002030555 A1 WO 2002030555A1 EP 0111684 W EP0111684 W EP 0111684W WO 0230555 A1 WO0230555 A1 WO 0230555A1
Authority
WO
WIPO (PCT)
Prior art keywords
segments
bulk material
rotation
axis
moving body
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.)
Ceased
Application number
PCT/EP2001/011684
Other languages
German (de)
English (en)
Other versions
WO2002030555A9 (fr
Inventor
Michael Witt
Thomas Kessler
Karl-Peter Farwerck
Kasper Evertz
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.)
Basell Polyolefine GmbH
Original Assignee
Basell Polyolefine GmbH
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 Basell Polyolefine GmbH filed Critical Basell Polyolefine GmbH
Priority to AU2002215934A priority Critical patent/AU2002215934A1/en
Priority to JP2002533991A priority patent/JP2004518931A/ja
Priority to EP01986619A priority patent/EP1330304A1/fr
Priority to US10/398,181 priority patent/US20040093759A1/en
Publication of WO2002030555A1 publication Critical patent/WO2002030555A1/fr
Anticipated expiration legal-status Critical
Publication of WO2002030555A9 publication Critical patent/WO2002030555A9/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/021—Heat treatment of powders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
    • B01J8/087—Heating or cooling the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
    • B01J8/10—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles or endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/18—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles
    • F26B11/181—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles the receptacle being a foraminous, perforated or open-structured drum or drum-like container, e.g. rotating around a substantially horizontal or vertical axis; the receptacle being multiple perforated drums, e.g. in superimposed arrangement
    • F26B11/185—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles the receptacle being a foraminous, perforated or open-structured drum or drum-like container, e.g. rotating around a substantially horizontal or vertical axis; the receptacle being multiple perforated drums, e.g. in superimposed arrangement the drum provided with internal subdivisions or multiple walls
    • F26B11/187—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles the receptacle being a foraminous, perforated or open-structured drum or drum-like container, e.g. rotating around a substantially horizontal or vertical axis; the receptacle being multiple perforated drums, e.g. in superimposed arrangement the drum provided with internal subdivisions or multiple walls the subdivisions consisting of sector-shaped perforated chambers
    • 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
    • F26B17/30—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00327—Controlling the temperature by direct heat exchange
    • B01J2208/00336—Controlling the temperature by direct heat exchange adding a temperature modifying medium to the reactants
    • B01J2208/00353—Non-cryogenic fluids
    • B01J2208/00371—Non-cryogenic fluids gaseous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • B29B2009/168—Removing undesirable residual components, e.g. solvents, unreacted monomers; Degassing

Definitions

  • the invention relates to a method for the thermal treatment of solids in powder or granular form by means of gas streams using a body which can be moved about an axis of rotation.
  • heating pulverized or granular material is to use heated mixers, in which case both the housing surfaces of a heated mixer and the mixing tools themselves can be heated.
  • Mixer drive the control, the supply and discharge of the product must be operated, so that, for example, retrofitting existing extrusion systems and
  • Extrusion lines are generally not possible or can only be implemented with considerable effort. If steam is introduced directly for drying or conditioning solid matter in powder or granule form, rapid heating is achieved due to the high heat of condensation. If saturated steam is also used for heating with steam, local overheating can occur damage to the powder or granules to be heated can be reliably avoided.
  • the disadvantage of using steam as the temperature control medium is that the condensate formed can only be removed again with relatively great effort. For this reason, targeted heating with steam of solids in powder or granule form, for example polymer solids capable of shaking, has generally only been possible in those technical processes in which the resulting residual moisture in the heated product does not have any serious disadvantages in the process steps following the heating process entails. A post-treatment of the heated product to remove the residual moisture would be a follow-up to be carried out with great effort.
  • the object of the invention is to achieve a conditioning of solids in powder or granule form such that both solids in which oxygen residues can remain in the product to be processed, and solids in which no oxygen residues may remain in the product to be processed can be directly conditioned by means of direct steam injection.
  • this object is achieved in that, in a process for the thermal treatment of solids in powder or granule form with gas streams by means of a body moved about an axis of rotation, the following process steps are carried out successively:
  • the product throughput can be set in a targeted manner by regulating the rotational speed of the moving body about its axis of rotation by means of the body moving about its axis of rotation, which contains cells configured in segments.
  • the moving body is preferably a single cell wheel containing cells which are arranged separately from one another and whose chambers are open in the radial direction. Because of the very small structural size of the moving body and the substitution of an existing metering device, the method proposed according to the invention can be easily integrated into existing process chains in extrusion lines or extrusion machines. It is irrelevant whether the body moved about its axis of rotation is operated in a horizontal arrangement or whether the body moved about its axis of rotation is operated in a vertical arrangement.
  • the individual segments of the rotating body are loaded or emptied over the outer circumference when the body moving about its axis of rotation is arranged vertically.
  • Both the steam in particular saturated steam, air, and an inert gas, for example nitrogen, can be introduced into the individual segments or chambers via the outer circumference of the moving body.
  • a perforated segment can be provided on the outer ring of the body configured as a cellular wheel and moving about its axis of rotation.
  • the bulk material can be it in powder form or in granulate form, and can be added to the individual segments of the cellular wheel on the outer ring of the moving body, and via the outer ring after almost one revolution from the individual segments of the body moving about its axis of rotation be emptied.
  • both the bulk material from the outer circumference and the air entering from the outside can be supplied from outside the moving body.
  • Both the steam and the gas stream entering via the outer surface can advantageously be removed from the individual segments via lines formed in the hub of the cellular wheel.
  • the vapor flow introduced on the outer circumferential surface of the cellular wheel, after its condensation and flow through the cells, together with their contents, can be collected at the hub of the cellular wheel and removed from there via a discharge line running coaxially with the axis of rotation from the vane cellular wheel.
  • a gas stream for example a nitrogen stream
  • nitrogen flows into the individual segments from the hub of the cellular wheel rotating about its axis of rotation, flows through the bulk material present there and supports the product discharge from the individual segment chambers at the product discharge point at the product discharge point of the cellular wheel.
  • a bulk material supply is assigned to the outer circumference of such a cell wheel.
  • the moving body can also be operated in a horizontal arrangement, so that the bulk material received in the segments can be acted upon by gas flows parallel to the axis of rotation of the body rotating about its axis of rotation.
  • the gases preferably enter the bed from above and flow downward. In this case, the moisture can be separated off, supported by gravity.
  • the individual segments charged with bulk material, stationary lines are provided both for bulk material, for steam or in particular for gases or inert gases and a stationary extraction line.
  • the individual segments embodied on the moving rotating body configured as a cellular wheel can be provided with cover surfaces in an alternating sequence.
  • the cover areas can optionally be provided.
  • the alternating order of the cover surfaces can be chosen differently on the bottom and on the cover of the cell wheel operated in a horizontal configuration, for example as an inlet or outlet for the bulk material, as cover surfaces arranged in segments in alternating arrangement without gas passage, and for example perforated segment surfaces which allow gas passage.
  • a vane cell wheel is used as the moving body, segments are created that are pie-shaped and are separated from one another by partitions.
  • solids can be treated in a movable body divided as a cell wheel by segment walls in individual cells in such a way that oxygen residues can remain in the solid which do not interfere with further processing.
  • drying can be largely supported by the air access, so that air access is sufficient at the cell wheel moved about its axis of rotation (in a horizontal arrangement).
  • the body in the segments of the moving body which is designed as a cellular wheel, can be conditioned by means of steam for heating, which then leads to inerting of the bulk material with inert gases.
  • the outlet surfaces and possibly the access surfaces are designed as a perforated grid arrangement.
  • the method proposed according to the invention can be used both for solids in which a residual oxygen content may remain, this according to the invention proposed methods can be implemented just as well on solids in powder or granular form, in which a residual residual oxygen content in the solid is critical. This is met by the number of air or inert gas inlets or outlets on the cellular wheel, which can be provided as an exemplary embodiment of a moving body.
  • the object is further achieved by a device for the thermal treatment of solids in powder or granular form with gas streams by means of a body which can be moved about its axis of rotation and comprises individual segments, covers being provided in segments in the lid and in the bottom of the movable body allow bulk material or gas flow to enter or exit.
  • the product throughput can be individually adjusted and influenced in accordance with the plant requirements, for example for the supply of extruder raw materials.
  • the moving device which is designed to rotate about its axis of rotation, be it in a vertical or in a horizontal arrangement, can be configured as a cellular wheel, the cellular wheel hub having lines for steam condensate and gas and lines for gas to support the emptying of the individual segments over the circumference of the cell wheel acting as a moving body can have.
  • FIG. 1 shows a side view of a moving body operated in a vertical arrangement with product and product discharge and gas entry over the outer peripheral surface
  • FIG. 2 shows a cellular wheel arrangement shown in perspective, with an associated supply shaft
  • FIG. 3 shows a cell wheel operated in a horizontal orientation, rotating about its axis of rotation with schematically drawn in and out of bulk goods and
  • Figure 4 shows a cover configuration of a cellular wheel for drying mainly with
  • FIG. 5 shows the bottom configuration of a moving body for drying with air according to FIG. 4 with perforated surfaces that allow the gas to escape, covering the segments,
  • FIG. 6 shows a cover configuration of a cellular wheel functioning as a moving body for heating and optionally inerting the product
  • FIG. 7 shows the configuration of the base part of a cellular wheel belonging to the base configuration according to FIG. 6.
  • FIG. 1 shows a side view of a cell wheel operated in a vertical orientation.
  • FIG. 1 shows a cellular wheel 2 rotating about an axis of rotation 1, which rotates, for example, clockwise 26 about the axis of rotation 1.
  • the cellular wheel 2 is divided into individual cellular wheel segments 3, the individual segments 3 being formed by segment walls 6 extending from the hub of the cellular wheel 2.
  • the segment arch of a segment is shown as an example with reference number 3.1.
  • the loading or emptying of the individual segments 3 takes place over the outer circumference, on which both a bulk material feed 4 and a bulk material discharge 5 and a steam inlet 16 are indicated in a schematic manner.
  • the individual segments 3 of the cellular wheel 2 are loaded via the feed or discharge points mentioned, whereby Coaxial to the axis of rotation 1 in the area of the cellular wheel hub, outlet lines for steam condensate or air discharge lines which are set up can be provided.
  • an inert gas flow which generates radially from the inside in each segment 3 of the cellular wheel can also be produced via a feed line for inert gas which also runs coaxially with the axis of rotation 1 of the cellular wheel 2 Generate 2.
  • This inert gas flow direction can advantageously be set in the radial direction to the outside immediately before or during the point in time at which the segment bend 3.1 of a segment 3 now containing bulk material lies opposite a product discharge 5. At this time, the emptying of the respective segment 3 of treated bulk material is supported by the inert gas flow taking place from the inside, so that its complete emptying can be ensured.
  • untreated bulk material can be re-introduced into the emptied cell 3 into a segment cell of the cell wheel 2 which is emptied in this way via the bulk material feed 4.
  • An air inlet 23, which can be optionally provided, can also be provided on the outside of the cellular wheel 2 via the outer surfaces (segment arc 3.1) of the respective segments 3 of the cellular wheel 2 ,
  • the air flowing in from the outside, which dries the bulk material contained in the individual segments 3, can likewise be discharged from the individual segments 3 via the derivatives provided in the area of the cellular wheel hub.
  • the inert gas flow direction 9 can be handled by the individual bulk material that is now treated, ie. heated and dried cells containing bulk 3 in Set the manner already mentioned above, so that the inert gas flow 9 running from the inside to the outside through the segments 3 allows complete emptying of the individual segments 3 of the cellular wheel 2 with respect to the bulk material removal 5.
  • Figure la shows the schematic representation of a vane wheel.
  • the vane wheel 2 which is rotatable about its axis of rotation 1 and is preferably used as a moving body, rotates relative to a boundary surface, not shown here. When installed in a vertical arrangement 28, it rotates with respect to two laterally arranged, stationary receiving boundary surfaces; when in a horizontal arrangement 29, relative to a bottom surface and top surface. If the vane wheel according to FIG. 1 a is arranged horizontally, an upper cover can be provided, but this is not absolutely necessary.
  • the individual segments 3 which are open in the region of the segment arch 3.1 are separated from one another by segment walls 6.
  • the direction of rotation of the vane wheel 2 used as a moving body corresponds in the configuration according to FIG. 1 and la clockwise; however, the direction of rotation could also be reversed if the entry and exit surfaces were adjusted accordingly.
  • FIG. 2 A perspective view of FIG. 2 shows in more detail a cell wheel 2 which can be rotated in a vertical arrangement 28 about its axis of rotation and which is supplied with bulk material over its outer circumference via a bulk material feed device 10 shown in a schematic configuration. Not shown here, there is a bulk material supply above the bulk material shaft, via which bulk material is continuously present at the bulk material feed device 10.
  • the opening of the bulk material chute can advantageously be adapted to the outer curvature of the circumferential surface of the cell wheel serving as rotating body 3 and, with its opening area 13, can only sweep over a fraction of the segment sheet 3.1 of a segment 3 of the cell wheel 2 that is to be filled or loaded. In contrast, the opening can also sweep over the entire segment arch 3.1 between two adjacent segment walls 6.
  • Reference number 5 denotes the bulk material removal point, which is not shown in any more detail here (see illustration according to FIG. 1).
  • the bulk material discharge 5 is preferably located on the underside in order to empty the individual containing the product, which is favored by gravity, in addition to the inert gas flow 9 running radially from the inside to the outside through the individual segments 3 To ensure cells 3 of the cellular wheel 2.
  • a cell wheel 2 operated in a horizontal orientation is shown in a schematic arrangement.
  • the bodies configured as cellular wheel 2, rotating about the axis of rotation 1 in the clockwise direction 26, contain individual segments 3 which are separated from one another by segment walls 6 extending in a star shape via the hub.
  • the height of the individual segments 3 of the cellular wheel 2 is identified by reference numeral 18.
  • the cover system of the cellular wheel 2 which is not shown in detail here, but which is explained in more detail below, which can optionally be provided with a horizontal arrangement 29.
  • the perforated segments that allow gas access are optionally provided.
  • the bulk material to be treated which is in powder or granule form, is introduced into the individual segments 3 of the cellular wheel 2.
  • a cellular wheel 2 is provided, from which, identified by reference numeral 17, a product is discharged into a further processing unit (not shown here), for example an extruder.
  • the segment 3 of the cellular wheel 2 which is just filled with bulk material to be treated in powder or granule form rotates clockwise 26 about its axis of rotation 1 oriented in the vertical direction as shown in FIG. 3.
  • the bulk material contained in the segment cell 3 is separated by the heated with reference numeral 16 or 22 provided steam entry in the corresponding segment 3 in stationary form.
  • the drying takes place.
  • Steam entry, inert gas supply and an optional air inlet can be provided stationary on the top of the cellular wheel 2. It is particularly preferred to carry out the steam introduction on the segmented areas configured as pie pieces.
  • the gas escapes on the underside of the cellular wheel 2.
  • the bottom area of the cellular wheel 2 according to Figure 3 - although not shown here - provided with gas permitting surfaces.
  • FIG. 4 shows the lid area of a movable body 2, which is designed as a cellular wheel and is used essentially for drying the solid in powder or granular form with air.
  • An optional cell wheel cover designated by reference numeral 19 is divided into individual segments 3 by segment walls 6 as shown in FIG. 3.
  • Reference number 4 denotes the product entry to be made in segment 3, while the segment 3 lying next to it in the clockwise direction 26 is closed by a fixed cover 21.
  • the segments 3 appearing as white areas in FIG. 4 represent the segments 3 of the cellular wheel 2, which moves clockwise 26 about its axis of rotation 1, taken in a vertical arrangement. Through the opening of the corresponding segment 3, which is released at 4, solids can consequently enter this segment 3.
  • the bulk material is not treated; in the adjoining segment 3, viewed in the clockwise direction 26, a steam supply 22 takes place.
  • the outer arc of the segment 3 is designated by reference number 3.1.
  • a cover configuration 19 of a cellular wheel 2 two adjacent segments 3 are opened in order to allow inert gases such as CO 2 to pass through.
  • the white area means a corresponding opening or a plate that allows gas to pass through.
  • FIG. 4 segment areas lying next to one another in the lower area and allowing an inert gas supply 24, of which only 2 are shown here, can also extend over more than 2 segments 3 of the cellular wheel 2.
  • FIG. 5 shows the bottom area of a cellular wheel 2, which primarily serves to dry a solid by supplying air, wherein oxygen residues which do not impair the further processing of the solid may still be present in the solid to be dried.
  • Reference number 17 denotes segment 3, on which the bulk material picked up in segment 3 during a rotation of cell wheel 2 in the clockwise direction 26 of its axis of rotation 1 has undergone a complete treatment cycle and leaves segment 3 at this point.
  • Reference 17 denotes the product discharge from the respective segment 3.
  • the bottom of a cellular wheel 2 serving as a moving body is equipped with both gas passage and solid sheets 25 per segment 3 preventing bulk material passage, whereas from the illustration gem.
  • Figure 5 shows that individual segments 3 can be provided with a perforated or lattice-shaped bottom, which Although the bulk material in the individual segments 3, which are separated from one another by the indicated segment walls 6 of the cellular wheel 2, is retained, it does, however, permit water vapor, inert gas and drying air to pass through.
  • FIGS. 6 and 7 show configurations of a movable body which allows solids to be treated in granular or powder form, in which no disturbing oxygen residues which may impair further processing may be present after the treatment. For example, this can be a problem when composing polyethylenes; especially if the products are pneumatically conveyed with air and therefore have a high oxygen content.
  • FIGS. 4 and 5 are in accordance with the design variants. 6 and 7, a larger proportion of segments 3 on the cellular wheel 2 are exposed to nitrogen inert gas inlets 24.1, 24.2, 24.3 and 24.4, whereas an air supply in the individual segments according to FIG. of the cover configuration 19 in FIG. 6 is completely omitted.
  • the inert gas for example nitrogen
  • the lid configuration in FIG. 4 would further increase the currently undesirable oxygen content of the solid in the form of granules or powder. Accordingly, the bottom side is gem. the representation from FIG.
  • the bottoms of the individual segments 3 are made in such a way that the bulk material remains in them, but inertization of the bulk material contained therein remains possible.
  • the lattice-shaped or mesh-like or perforated bottoms allow the bulk material to be conditioned to be retained in the segments 3 of the cellular wheel 2; on the other hand, gas passage can be achieved through the openings provided in the bottom. 7 shows that the individual base segments 27.1, 27.2, 27.3, 27.4, 27.5, 27.6 and 27.7 lie next to one another in the direction of rotation 26, ie seen in the clockwise direction.
  • the product discharge parallel to the axis of rotation 1 of the cellular wheel 2 is possible, at which the product leaves the segments 3 of the cellular wheel 2.
  • a cellular wheel 2 operated in this way in a horizontal arrangement 29 it can be very efficiently by direct steam introduction on the cover side 19 of the cellular wheel 2 as well drive out oxygen from the granules or powder present in solid form by subsequent inert gas supply at meler successive locations.
  • a low oxygen content in the feed stream and in the polymer melt means a higher quality product, which can be classified in terms of quality, for example with regard to the yellowness index.
  • Extruder is reduced. This means advantages in terms of the life of the extruder and advantages in terms of maintenance cycles.
  • the material throughput can be increased significantly.
  • the overall height 18 of the cellular wheel 2 is approximately 11.3 cm.
  • 0.5 t steam per hour which is about 800 m 3, is used to heat the polyethylene grit or the bulk material in granular or powder form from 20 to 100 ° C corresponds per hour.
  • 13 m can be passed through the cellular wheel 2 per minute. This corresponds to a volume flow of 200 1 steam per second. Assuming the flow velocity of the steam is about 4.5 km / h. an average dwell time of the material present in powder or granule form in the steam flow is about 6 seconds.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour traiter thermiquement des matières solides se présentant sous forme pulvérulente ou granulée à l'aide de flux de gaz (7, 16, 22, 23, 24), au moyen d'un corps (2) en mouvement autour de son axe de rotation (1). Ce procédé comprend successivement les étapes suivantes : dans un premier temps, les matières en vrac placées dans des segments (3) du corps en mouvement (2) sont chauffées par exposition à de la vapeur d'eau (22). Les matières en vrac chauffées sont ensuite soumises à une amenée d'air (23) et/ou à une amenée de gaz inerte (24) au cours d'une ou de plusieurs étapes subséquentes. Pour finir, les matières séchées et/ou rendues inertes sont extraites (17) des segments (3) du corps (2) en mouvement autour de son axe de rotation (1).
PCT/EP2001/011684 2000-10-13 2001-10-10 Procede et dispositif pour le traitement thermique d'un materiau se presentant sous forme pulverulente ou granulee Ceased WO2002030555A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2002215934A AU2002215934A1 (en) 2000-10-13 2001-10-10 Method and device for thermally treating a material in pulverulent or granulate form
JP2002533991A JP2004518931A (ja) 2000-10-13 2001-10-10 粉末状又は顆粒状物質を熱処理する方法及び装置
EP01986619A EP1330304A1 (fr) 2000-10-13 2001-10-10 Procede et dispositif pour le traitement thermique d'un materiau se presentant sous forme pulverulente ou granulee
US10/398,181 US20040093759A1 (en) 2000-10-13 2001-10-10 Method and device for the thermally treating a material in pulverulent or granulate form

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10050720A DE10050720A1 (de) 2000-10-13 2000-10-13 Verfahren und Vorrichtung zur thermischen Behandlung pulver- oder granulatförmig vorliegenden Materials
DE10050720.4 2000-10-13

Publications (2)

Publication Number Publication Date
WO2002030555A1 true WO2002030555A1 (fr) 2002-04-18
WO2002030555A9 WO2002030555A9 (fr) 2003-12-11

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PCT/EP2001/011684 Ceased WO2002030555A1 (fr) 2000-10-13 2001-10-10 Procede et dispositif pour le traitement thermique d'un materiau se presentant sous forme pulverulente ou granulee

Country Status (7)

Country Link
US (1) US20040093759A1 (fr)
EP (1) EP1330304A1 (fr)
JP (1) JP2004518931A (fr)
CN (1) CN1630550A (fr)
AU (1) AU2002215934A1 (fr)
DE (1) DE10050720A1 (fr)
WO (1) WO2002030555A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
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CN118463509A (zh) * 2024-07-11 2024-08-09 福建拓天生物科技有限公司 一种桑葚冷冻干燥设备及干燥方法

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CN106403537B (zh) * 2016-11-22 2018-11-20 中联重机股份有限公司 一种用于经济作物烘干机的料盒式转筒
CN108413406B (zh) * 2018-02-28 2024-03-22 浙江大学城市学院 一种焚烧充分的垃圾焚烧装置及其使用方法
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CN111721091A (zh) * 2020-06-26 2020-09-29 贾萍 一种农产品生产用种子沥水烘干一体式系统
CN114111253A (zh) * 2020-08-31 2022-03-01 湖南省靖泰现代农业科技有限公司 一种生产原生态果蔬产品使用的多功能果蔬烘干设备

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CN114234583B (zh) * 2022-02-28 2022-05-31 山东宝阳干燥设备科技有限公司 一种石墨高效烘干机
CN118463509A (zh) * 2024-07-11 2024-08-09 福建拓天生物科技有限公司 一种桑葚冷冻干燥设备及干燥方法

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CN1630550A (zh) 2005-06-22
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DE10050720A1 (de) 2002-04-25
US20040093759A1 (en) 2004-05-20
JP2004518931A (ja) 2004-06-24

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