[go: up one dir, main page]

WO2004113812A1 - Dispositif et methode pour chauffer, secher et/ou cristalliser des matieres plastiques - Google Patents

Dispositif et methode pour chauffer, secher et/ou cristalliser des matieres plastiques Download PDF

Info

Publication number
WO2004113812A1
WO2004113812A1 PCT/IB2004/002053 IB2004002053W WO2004113812A1 WO 2004113812 A1 WO2004113812 A1 WO 2004113812A1 IB 2004002053 W IB2004002053 W IB 2004002053W WO 2004113812 A1 WO2004113812 A1 WO 2004113812A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
materials
stirrers
rotating
zones
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/IB2004/002053
Other languages
English (en)
Inventor
Antonio Milani
Fabrizio Parodi
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.)
Amut SpA
Original Assignee
Amut SpA
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 Amut SpA filed Critical Amut SpA
Publication of WO2004113812A1 publication Critical patent/WO2004113812A1/fr
Anticipated expiration legal-status Critical
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
    • B29B13/08—Conditioning or physical treatment of the material to be shaped by using wave energy or particle radiation
    • 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
    • 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
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
    • 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
    • F26B17/18—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0855—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using microwave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0041—Crystalline

Definitions

  • the present invention relates to a device and a method for heating and/or drying plastic materials in a continuous way.
  • Drying plastic materials is generally necessary before these materials are used in subsequent operations, for example in extrusion or injection molding processes.
  • the presence of humidity in the materials may in fact impair the quality and/or appearance of subsequent production.
  • drying may also be performed prior to a storage phase, although always in view of the subsequent need for material with a low degree of humidity.
  • it may be necessary to heat the material to a predetermined temperature to obtain the desired molecular structural characteristics prior to use in subsequent processes.
  • PET polyethylene terephtalate
  • pre-crystallization procedures before use.
  • the most widely used heating/drying systems of the prior art are essentially based on storage of the plastic materials in containers of considerable size.
  • containers are required with a volume ranging from 3 to 20 times the volume of the plastic material to be dried, generally processed in the form of flakes or granules, as a function of the apparent specific weight of the material, of the processing time and of the productivity required.
  • the heating or drying process is performed by maintaining the materials inside these containers for a time depending on the diffusion speed of the water molecules through the polymer up to the surface of the granule or flake, and on the degree of humidity of the material subjected to processing.
  • the material is heated by contact with the heated walls of the container. In some cases, vacuum pressure is produced inside the container to accelerate the drying process and evacuate the gases produced.
  • the material is mixed continuously by stirrers to even out the temperature of the mass. With specific regard to continuous processes, heating takes place by blowing heated air while, if necessary, the material can be maintained in constant movement by stirrers to prevent possible compacting.
  • the volatile substances released from the material are thus removed from the container by means of the hot air current thus produced and then dispersed into the environment.
  • the process air is previously subjected to a drying phase using specific resins, until reaching condensation temperatures ranging from -40°C to -60°C, then heated and fed into the container.
  • the resins utilized for forced drying must in turn be regenerated, that is freed from the humidity absorbed. This is produced by air heated to high temperatures.
  • the water released by regeneration of the resins is dispersed into the environment, with consequent loss of energy.
  • microwave energy in heating and/or drying processes of plastic materials, for example, hygroscopic plastic materials, in which the humidity found in the same materials constitutes the means capable of absorbing this energy, or plastic materials that are in any case sensitive to this form of energy notwithstanding their capacity to absorb humidity.
  • An example of process and apparatus for continuously heating plastic materials with the use of microwave energy is disclosed in EP-A 1-0535771.
  • the apparatus comprises a drying room with a plurality of drying zones separated by partitions in the upper portion of the room in order to apply heating at different temperatures to the materials.
  • a rotary shaft with agitating blades allows to stir the materials passing in the lower portion of the room and make them to advance in the drying room up to a material outlet.
  • the task of the present invention is to propose a method and a device for heating, drying and/or crystallizing plastic materials in a continuous way which make it possible to overcome the drawbacks of prior art.
  • a general object of the present invention is to propose a method and a device of the aforesaid type which make it possible to produce heating, drying and/or crystallizing of plastic materials in a particularly rapid and efficient way.
  • a particular object of the present invention is to propose a method and a device of the aforesaid type which make it possible to avoid overheating of the processed materials.
  • Another object of the present invention is to propose a method and a device of the aforesaid type which avoids deposition of materials inside the process container.
  • a further object of the present invention is to propose a device and a method of the aforesaid type which make it possible to avoid slow progress of the materials in the process container.
  • Yet another object of the present invention is to propose a device of the aforesaid type which allows to be cleaned in a simple and easy way.
  • a device for heating, drying and/or crystallizing plastic materials in a continuous way including at least one process container, feeding means to continuously convey the materials inside the container, rotating means to stir the materials and/or make them to advance inside the container, drawing means to continuously remove the materials from the container and one or more microwave generators to heat the materials conveyed inside the container, characterized by recirculating means to connect the drawing means with the feeding means for the recirculation of at least part of the materials.
  • Recircuiation of the materials allows to hold the process container substantially full of materials in all the operating conditions, without causing undesired slow progress or stops of the materials inside the container, mainly near the drawing means which draw the materials coming out from the device.
  • the recirculating means include preferably one or more motor driven augers receiving the materials to be recirculated through at least one outlet port provided in correspondence of the drawing means.
  • the rotation of the motor driven augers is preferably regulated steplessly between two different preset speeds in order to vary the fraction of the materials to be recirculated as a function of the operating conditions.
  • the process container preferably comprises at least two cylindrical chambers having a circular cross section and extending in the direction of the cylindrical axis, the chambers intersecting to each other along a direction parallel to the axis.
  • the rotating means include at least two stirrers positioned side by side in a respective chamber of the container and made to rotate about mutually parallel axes.
  • Each of the stirrers includes a rotating shaft on which a plurality of radial blades are fixed. As well as contributing towards making the materials advance, the stirrers also exert a continuous mixing action on them.
  • the rotating elements can be produced in materials that reflect the waves of the electromagnetic field, so as to promote diffusion of the electromagnetic field in the mass of materials being conveyed in the container.
  • the microwave generators may be disposed so as to generate an electromagnetic field directed prevalently towards a direction which is offset with respect to the axis of rotation of the rotating element(s), preferably a direction shifted laterally towards the outside in respect of a perpendicular incident to the axes of rotation.
  • stirrers allow to continuously advance the materials through the process container and avoid any deposition of materials along their path inside the container.
  • the stirrers are removably housed inside the respective chambers and can be easily extracted thanks to a movable carriage supporting at least the gearmotor unit driving the stirrers.
  • the carriage includes means for supporting the shafts in the extracted condition and can be moved by a handling motor unit between an operative position of the stirrers within the chambers and an extracted position of the stirrers outside from the chambers. This allows to facilitate cleaning of the container and the stirrers, as for example when materials to be treated are different from those previously treated as regards colors or characteristics.
  • a method for heating, drying and/or crystallizing plastic materials in a continuous way wherein the materials are fed continuously inside a process container, are made to advance inside the container by rotating means and are drawn continuously from the container, and wherein the materials are heated during their path inside the container by a microwave electromagnetic field, characterized by providing a recirculation of at least part of the materials from the drawing means to the feeding means.
  • the humidity released by the processed materials is preferably removed by maintaining a vacuum inside the container, or in any case by maintaining the pressure inside the container below the external atmospheric pressure.
  • Control of the degree of dehumidification of the materials subjected to processing is preferably performed by detecting the temperature of the materials exiting from the container.
  • the power emitted by the various microwave generators disposed along the path along which the materials are conveyed inside the container is regulated as a function of the detected temperature at different points along the path of the materials, particularly in correspondence of each generator.
  • One or more temperature sensors are thus provided, as well as means suitable to control the emission power of the microwave generators as a function of the detected temperatures.
  • FIG. 1 is a simplified perspective view of a device according to a possible embodiment of the present invention.
  • - Figure 2 is a front elevation view in section a device according to the present invention
  • - Figure 3 is a side view in section of a device according to the present invention in its operative condition
  • FIG. 4 is a simplified top plan view in section of a device according to the present invention.
  • FIG. 5 is an enlarged view of a detail of the device shown in Figure 3.
  • FIG. 6 is a side view in section of a device according to the present invention with the stirrers extracted from the process container.
  • FIG. 1 schematically shows a possible embodiment of a device according to the present invention without some details, for sake of simplicity, as for example microwave generators and other elements of the device.
  • the device is essentially constituted by a process container 10 made preferably in a reflecting material for the microwaves at the wavelength utilized.
  • the materials are fed continuously (arrow M) to an upper collecting member, such as a hopper 22 which is at atmospheric pressure, through known devices (not shown), for example augers, band or bucket elevators or the like.
  • the hopper 22 is connected below to a compensation chamber 21 which is kept alternatively at atmospheric pressure and at vacuum or low pressure condition in order to allow the materials to be transferred to a lower hopper 20 which is kept only at vacuum or low pressure condition.
  • the latter may be directly connected to the inlet of a subsequent processing machine, as for example an extruder or the like.
  • a subsequent processing machine as for example an extruder or the like.
  • the recirculating means include at least one motor driven auger 1 which is connected to an outlet port 2 through the drawing means 40 and a discharge duct 3, where the materials are fed by gravity. Means are preferably provided to steplessly regulate the rotation of the motor driven auger(s) 1 between two different preset speeds, in order to make it possible to vary the fraction of the materials to be recirculated as a function of the quantity of materials required at discharge outlet 45.
  • the auger 1 is of the flexible type in order to bring the materials to be recirculated back to the hopper 20 through a feeding duct 4.
  • the process container 10 includes two cylindrical chambers 80 having a circular cross section and intersecting to each other along a direction parallel to the cylindrical axis.
  • the container 10 includes preferably an external coating 15 made in heat- insulating material. Inside each chamber 80 are rotating means, the function of which is essentially to stir the materials and/or make them advance.
  • Two stirrers 90 are positioned side by side in a respective chamber 80 of the container 10 and are made to rotate about mutually parallel axes.
  • Each stirrer comprises a rotating shaft 30 on which a plurality of radial blades 31 are fixed. Orientation of the blades 31 and the direction of rotation of the shafts 30 are chosen so as to make the materials advance and keep it moving towards a discharge zone of the container 10.
  • the radial blades 31 are preferably placed in alternate positions between the opposite shafts 90 (not shown in Fig. 4) in order to improve the mixing of the materials during rotation of the stirrers.
  • blades 32 and 33 faced to each other on the opposite shafts, namely two facing blades 32 in correspondence of the inlet zone of the materials feed by the hopper 20 and two facing blades 33 in correspondence of the discharging zone near the discharging outlet 2. These blades 32 and 33 avoid deposition of materials on front and rear internal walls of the container 10.
  • the materials advancing along the container 10 are heated by microwave electromagnetic field generators 50 disposed along the path of the materials in the container 10 and positioned so as to generate inside both the chambers 80 an electromagnetic field directed prevalently towards the materials being conveyed.
  • Each microwave generator 50 is mounted on the container 10 through a manifold 55, with interposition of a partition 56 made of a material transparent to microwaves (e.g. glass, TeflonTM or the like) between each manifold 55 and the container 10.
  • a partition 56 made of a material transparent to microwaves (e.g. glass, TeflonTM or the like) between each manifold 55 and the container 10.
  • the manifolds 55 have one or more holes to keep the inside of the manifold 55 at atmospheric pressure.
  • the manifolds 55 can have for example perforated walls, with hole having shape and dimensions that avoid the diffusion of microwaves o the outside.
  • the electromagnetic flux from the generators 50 is directed towards a direction which is offset with respect to the axis of rotation of the stirrers. Furthermore, the electromagnetic flux from the generators 50 is oriented towards areas free of rotating blades 31 on the respective chamber, while a rotating blade 31 is mounted on the shaft in the other chamber. In this way, the materials are continuously moved from one chamber and overheating of the same is so avoided.
  • the device according to the present invention may utilize generators 50 commonly available on the market.
  • generators 50 with a power between 2 and 10 kW can be used, designed to emit microwaves at a frequency of around 2450 MHz. in the embodiment herein disclosed, up to ten generators can be mounted, each having a power of 6kW, in order to reach a productivity of about 600 kg/h (according to, an estimate of about 100 W/kg per hour).
  • the number, layout and power of the generators 50 may obviously vary as a function of the length of the container 10, and as a function of the conditions and characteristics of the materials that are prevalently processed in the device and the flow rates of materials that the device must be capable of sustaining.
  • the rotation in opposite direction may be imparted by the gearmotor unit 35 at the same speed or, alternatively, the gearmotor unit may be designed to impart rotation at different speeds in order to obtain a random action of the blades 31 on the materials.
  • the auger 40 of the drawing means is driven by a gearmotor unit 44 which can be subject to a control unit that determines the rotation speed as a function of the output rate to be obtained. This is particularly useful when a device according to the present invention is directly connected to the feed section of an extruder, or of any other similar machine, positioned immediately downstream of the device.
  • a control unit (not shown) is preferably provided to allow the emission power of each of the generators 50 to be varied as a function of the characteristics, the conditions of humidity of the processed materials, and the degree of humidity to be obtained in the materials delivered.
  • Control is preferably produced as a function of the temperature of the materials detected in different points of the container. Temperature sensors 60 are thereby provided to produce a signal representing the temperature in each zone of the container 10 in which they are installed. These signals are sent to the control unit to adjust almost instantly the power emitted by each generator 50.
  • one or more sensors may be provided to detect the level of the materials in one or more zones of said container.
  • at least one sensor 66 can be provided in the upper portion of the discharging area inside the container 10 - the first area that can be partially emptied - in order to send signals representative of this detected condition to a suitable control unit.
  • the latter may be programmed to continuously vary the amount of materials coming out from the process container 10, i.e. the sum of the flow rate of materials drawn by the auger 40 and the flow rate of materials recirculated through the auger 1.
  • the control unit therefore operates on the gearmotor units driving auger 1 and 40 in order to restore the required filling condition inside the process container 10.
  • electrical conductive elements are placed between the container and the rotating shafts of the stirrers to keep the same in electrical contact to each other. This is due to the fact that electromagnetic fields can induce electrical current on metal elements. It must therefore be assured in any case - also in presence of lubricating materials - the electrical continuity between the rotating shafts 30 and the container 10 in order to avoid electrical discharges mainly inside the low pressure or vacuum environment of the container 10.
  • FIG. 5 A possible embodiment of this feature is shown in the enlarged view of Figure 5, where a bush 70 made of an electrical conductive and hardwearing material is pushed against the respective shaft 30 by spring means 71. Moreover, rotating sealing means 73 are provided for preventing the passage of processed materials towards the conductive bush 70. Sealing means 73 are also made of a conductive material suitable to operate at high temperatures in presence of variable electromagnetic fields. During steady operation, the materials to be processed are fed continuously to the container 10 and expelled through the discharge port 45.
  • the flow rate of the materials coming out through the outlet port 2 determines the speed of advance of the materials inside the process container 10.
  • a preset flow rate through the outlet port 2 can avoid accumulation of the materials at the end of the container.
  • the rotation speed of the stirrers 90 is automatically varied within a preset range in order to keep a preset torque on the gearmotor unit 35 driving the same stirrers.
  • the transport capacity of the stirrers is determined by setting a pre-established inclination of some blades 31 as a function of the physical properties of the materials to be processed.
  • the signal detected by the level sensor 66 ( Figure 3) is used to determine the flow rate at the outlet port 2 for keeping the required filling level and therefore assuring the desired cleaning action on the internal surfaces of the process container 10.
  • the stirrers 90 are removably housed inside the respective chambers 80 of the process container 10.
  • Figure 6 shows the device according to the invention with the stirrers 90 in extracted position.
  • the gearmotor unit 35 is mounted on a carriage 200 which is movable with respect to the supporting structure 100 of the container 10.
  • Means 201 are provided on the movable carriage 200 for supporting the stirrers 90 when they are extracted from the container 10.
  • a handling motor unit (not shown) can be provided for moving the carriage 200 between the operative position ( Figure 3) and the extracted position of the stirrers 90 ( Figure 6).
  • the stirrers 90 are designed to be easily removed to facilitate cleaning operations, especially when materials with different characteristics must be processed in succession, and also maintenance operations on the blades 31 and the shafts 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Microbiology (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

On chauffe des matières plastiques pendant que celles-ci traversent un conteneur (10) au moyen d'un champ électromagnétique aux micro-ondes et on remet continuellement en circulation au moins une partie des matières plastiques.
PCT/IB2004/002053 2003-06-20 2004-06-21 Dispositif et methode pour chauffer, secher et/ou cristalliser des matieres plastiques Ceased WO2004113812A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPCT/IT03/00381 2003-06-20
PCT/IT2003/000381 WO2005003664A1 (fr) 2003-06-20 2003-06-20 Dispositif et procede permettant de chauffer et/ou de secher des materiaux en plastique

Publications (1)

Publication Number Publication Date
WO2004113812A1 true WO2004113812A1 (fr) 2004-12-29

Family

ID=33524017

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/IT2003/000381 Ceased WO2005003664A1 (fr) 2003-06-20 2003-06-20 Dispositif et procede permettant de chauffer et/ou de secher des materiaux en plastique
PCT/IB2004/002053 Ceased WO2004113812A1 (fr) 2003-06-20 2004-06-21 Dispositif et methode pour chauffer, secher et/ou cristalliser des matieres plastiques

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/IT2003/000381 Ceased WO2005003664A1 (fr) 2003-06-20 2003-06-20 Dispositif et procede permettant de chauffer et/ou de secher des materiaux en plastique

Country Status (1)

Country Link
WO (2) WO2005003664A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007068647A1 (fr) * 2005-12-15 2007-06-21 Basf Aktiengesellschaft Procédé de traitement d'une poudre ou d'un granulat d'un thermoplastique ou d'un caoutchouc dans une machine à vis
EP1847791A1 (fr) * 2006-04-21 2007-10-24 Bearn Innovation Procédé de séchage des boues et dispositif permettant la mise en oeuvre du procédé
CN104552651A (zh) * 2014-11-25 2015-04-29 常州市兆辉电子有限公司 塑料颗粒搅拌电热丝加热排风干燥机
CN110815633A (zh) * 2019-11-23 2020-02-21 郑州大岭塑胶制品有限公司 一种塑料袋加工用塑料颗粒融化装置
WO2024047295A1 (fr) * 2022-08-29 2024-03-07 Innovation & Development Company Four de calcination par micro-ondes pour matériaux solides divisés en fines particules

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109028902A (zh) * 2018-08-28 2018-12-18 河南省德耀节能科技股份有限公司 一种湿、粘类物料烘干系统及其烘干设备
CN115751923A (zh) * 2022-11-23 2023-03-07 景津装备股份有限公司 四层螺旋折返输料式热气穿流除湿机及滤饼四步除湿方法

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE45080C (de) * 1888-01-17 1888-11-02 BÜTTNER & MEYER in Uerdingen a. Rhein Trockner mit Sichteinrichtung
GB191405647A (en) * 1914-03-05 1915-03-05 Richard Simon Improvements connected with Drying Machines.
US2705842A (en) * 1952-03-28 1955-04-12 Prentice E Edrington Dehydrating apparatus
US3834038A (en) * 1972-09-14 1974-09-10 Gammaflux Inc Method for drying moldable resins
DE2752363A1 (de) * 1977-11-24 1979-06-07 Metallgesellschaft Ag Kontinuierliches verfahren und vorrichtung zur mechanischen und thermischen behandlung von foerderfaehigen produkten
EP0005552A2 (fr) * 1978-05-23 1979-11-28 Bruno Granella Dispositif de chauffage et de mélange de matériaux de construction
GB2110803A (en) * 1981-10-23 1983-06-22 Balfour And Co Limited Henry Microwave drying of granular materials
US4406937A (en) * 1980-03-13 1983-09-27 Joel Soulier Microwave device for the heat treatment of powdery or granular materials
US4881473A (en) * 1984-12-03 1989-11-21 Atlantic Richfield Company Method and apparatus for treating oil-water-solids sludges and refinery waste streams
EP0345020A2 (fr) * 1988-05-31 1989-12-06 Kawata Co., Ltd Dispositif pour sécher et cristalliser des granules
DE3907248A1 (de) * 1989-03-07 1990-09-13 Kirchhoff Gmbh F Muldentrockner fuer schuettgut, insbesondere asphaltgranulat
EP0535771A1 (fr) * 1991-10-04 1993-04-07 Matsui Manufacturing Co., Ltd. Dispositif pour le séchage de produits pulvérulents ou granuleux
US5263267A (en) * 1989-03-20 1993-11-23 Judco Manufacturing, Inc. Method and apparatus for reducing volatile content of sewage sludge and other feed materials
EP0590411A2 (fr) * 1992-09-16 1994-04-06 Doryokuro Kakunenryo Kaihatsu Jigyodan Appareillage pour la dénitrification en continu
DE4321142A1 (de) * 1993-06-25 1995-01-05 Colortronic Gmbh Verfahren und Vorrichtung zum Trocknen von Granulat
US5401402A (en) * 1991-08-26 1995-03-28 Rdp Company Process and apparatus for treating sewage sludge
US5454344A (en) * 1993-03-01 1995-10-03 Hosokawa Bepex Corporation System for polymer crystallization
US5857264A (en) * 1994-03-31 1999-01-12 Debolini; Paolo Dryer, particulary for granular or powdered products

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1941163A1 (de) * 1969-08-13 1971-02-25 Albert Ag Chem Werke Verfahren und Vorrichtung zum kontinuierlichen Trocknen bzw. Vorwaermen und Vorplastifizieren von Formmassen mit Hochfrequenz
US4055001A (en) 1971-11-18 1977-10-25 Exxon Research & Engineering Co. Microwave drying process for synthetic polymers
US3777095A (en) * 1972-05-15 1973-12-04 Tokyo Shibaura Electric Co Microwave heating apparatus
US4038021A (en) * 1976-04-05 1977-07-26 Benson John O Continuous grain drier and method
US5105555A (en) 1990-01-11 1992-04-21 Shoji Nakagomi Plastic drying apparatus
DK172734B1 (da) * 1996-03-21 1999-06-21 Peter Kier Apparat til tørring af et granulat

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE45080C (de) * 1888-01-17 1888-11-02 BÜTTNER & MEYER in Uerdingen a. Rhein Trockner mit Sichteinrichtung
GB191405647A (en) * 1914-03-05 1915-03-05 Richard Simon Improvements connected with Drying Machines.
US2705842A (en) * 1952-03-28 1955-04-12 Prentice E Edrington Dehydrating apparatus
US3834038A (en) * 1972-09-14 1974-09-10 Gammaflux Inc Method for drying moldable resins
DE2752363A1 (de) * 1977-11-24 1979-06-07 Metallgesellschaft Ag Kontinuierliches verfahren und vorrichtung zur mechanischen und thermischen behandlung von foerderfaehigen produkten
EP0005552A2 (fr) * 1978-05-23 1979-11-28 Bruno Granella Dispositif de chauffage et de mélange de matériaux de construction
US4406937A (en) * 1980-03-13 1983-09-27 Joel Soulier Microwave device for the heat treatment of powdery or granular materials
GB2110803A (en) * 1981-10-23 1983-06-22 Balfour And Co Limited Henry Microwave drying of granular materials
US4881473A (en) * 1984-12-03 1989-11-21 Atlantic Richfield Company Method and apparatus for treating oil-water-solids sludges and refinery waste streams
EP0345020A2 (fr) * 1988-05-31 1989-12-06 Kawata Co., Ltd Dispositif pour sécher et cristalliser des granules
DE3907248A1 (de) * 1989-03-07 1990-09-13 Kirchhoff Gmbh F Muldentrockner fuer schuettgut, insbesondere asphaltgranulat
US5263267A (en) * 1989-03-20 1993-11-23 Judco Manufacturing, Inc. Method and apparatus for reducing volatile content of sewage sludge and other feed materials
US5401402A (en) * 1991-08-26 1995-03-28 Rdp Company Process and apparatus for treating sewage sludge
EP0535771A1 (fr) * 1991-10-04 1993-04-07 Matsui Manufacturing Co., Ltd. Dispositif pour le séchage de produits pulvérulents ou granuleux
EP0590411A2 (fr) * 1992-09-16 1994-04-06 Doryokuro Kakunenryo Kaihatsu Jigyodan Appareillage pour la dénitrification en continu
US5454344A (en) * 1993-03-01 1995-10-03 Hosokawa Bepex Corporation System for polymer crystallization
DE4321142A1 (de) * 1993-06-25 1995-01-05 Colortronic Gmbh Verfahren und Vorrichtung zum Trocknen von Granulat
US5857264A (en) * 1994-03-31 1999-01-12 Debolini; Paolo Dryer, particulary for granular or powdered products

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007068647A1 (fr) * 2005-12-15 2007-06-21 Basf Aktiengesellschaft Procédé de traitement d'une poudre ou d'un granulat d'un thermoplastique ou d'un caoutchouc dans une machine à vis
EP1847791A1 (fr) * 2006-04-21 2007-10-24 Bearn Innovation Procédé de séchage des boues et dispositif permettant la mise en oeuvre du procédé
FR2900224A1 (fr) * 2006-04-21 2007-10-26 Bearn Innovation Bernard Dedie Procede de sechage des boues et dispositif permettant la mise en oeuvre du procede
WO2007122328A1 (fr) * 2006-04-21 2007-11-01 Bearn Innovation - Dedieu Bernard Procédé de séchage des boues et dispositif permettant la mise en oeuvre du procédé
AU2007242682B2 (en) * 2006-04-21 2011-12-22 INNOTHERM-E Technologies Method of drying sludge and device for implementing the method
CN104552651A (zh) * 2014-11-25 2015-04-29 常州市兆辉电子有限公司 塑料颗粒搅拌电热丝加热排风干燥机
CN110815633A (zh) * 2019-11-23 2020-02-21 郑州大岭塑胶制品有限公司 一种塑料袋加工用塑料颗粒融化装置
WO2024047295A1 (fr) * 2022-08-29 2024-03-07 Innovation & Development Company Four de calcination par micro-ondes pour matériaux solides divisés en fines particules

Also Published As

Publication number Publication date
WO2005003664A1 (fr) 2005-01-13

Similar Documents

Publication Publication Date Title
CN102821923B (zh) 喷管
RU2441752C2 (ru) Способ и устройство для обработки полимерного материала
EP0535771B1 (fr) Dispositif pour le séchage de produits pulvérulents ou granuleux
EP2650632B1 (fr) Séchoir à bandes multi-produits pour matériaux pâteux et/ou poudreux, particulièrement pour sécher des boues d'usines de traitement ou de la biomasse
EP0466362B1 (fr) Dispositif pour le séchage de produits pulvérulents ou granuleux
US20170051974A1 (en) Infrared drying system for wet organic solids
KR20000005149A (ko) 스크류 컨베이어에서의 벌크 재료 열처리 장치 및벌크 재료 건조 방법
WO2004113812A1 (fr) Dispositif et methode pour chauffer, secher et/ou cristalliser des matieres plastiques
EP0312741A2 (fr) Procédé et dispositif pour le séchage de matériau synthétique au moyen de micro-ondes
US20120067438A1 (en) Polymer treatment device for providing a treatment to a polymer bed, a computer-readable medium associated with a controller thereof, and an associated molding system
JPH0615639A (ja) 熱可塑性の重縮合物から重合体を製造するための方法および装置
EP2999544A2 (fr) Une méthode, un système et dispositifs pour traiter au moins une substance en un produit final sec, fragmenté et fluidisé
CN110186253B (zh) 一种用于粮食加工的微波干燥机及其干燥方法
KR20100128621A (ko) 가공폐기물 건조장치
CN111231274A (zh) 一种高效的塑料桶全自动供料生产系统
EP1703239B1 (fr) Dispositif pour la déshumidification rapide et continue de matières en vrac, notamment de granules pour une machine de moulage de matières plastiques
JP2009082764A (ja) 食品ゴミの乾燥方法及び装置
CN116481287B (zh) 一种颗粒饲料加工在线烘干装置
CN1684997A (zh) 通过固相聚合增加聚酯材料的特性粘度的方法及设备
US5740617A (en) Rotary drum dryer
EP3978853A1 (fr) Silo à séchage vertical
CN214183998U (zh) 一种干燥脱挥振动筛装置
CN113758187A (zh) 一种塑料制品生产用防潮干燥装置
CN220008450U (zh) 一种具有定量出料功能的塑料颗粒干燥装置
KR20000040206A (ko) 곡물 및 고추 건조장치

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase