WO2000027603A1 - Procede et dispositif pour la production de granulats en materiaux polymeres - Google Patents

Procede et dispositif pour la production de granulats en materiaux polymeres Download PDF

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Publication number
WO2000027603A1
WO2000027603A1 PCT/EP1999/008403 EP9908403W WO0027603A1 WO 2000027603 A1 WO2000027603 A1 WO 2000027603A1 EP 9908403 W EP9908403 W EP 9908403W WO 0027603 A1 WO0027603 A1 WO 0027603A1
Authority
WO
WIPO (PCT)
Prior art keywords
granules
drying
drying process
liquid
cleaning liquid
Prior art date
Application number
PCT/EP1999/008403
Other languages
German (de)
English (en)
Other versions
WO2000027603B1 (fr
Inventor
Bernhard Stark
Olaf Hustert
Udo Huber
Original Assignee
Waeschle 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 Waeschle Gmbh filed Critical Waeschle Gmbh
Priority to JP2000580812A priority Critical patent/JP2002529271A/ja
Priority to EP99957986A priority patent/EP1045748A2/fr
Publication of WO2000027603A1 publication Critical patent/WO2000027603A1/fr
Publication of WO2000027603B1 publication Critical patent/WO2000027603B1/fr

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
    • B29B13/06—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
    • 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
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
    • 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
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • 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
    • F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment

Definitions

  • the invention relates to a method for producing granules from polymeric materials according to the preamble of claim 1 and a device suitable for carrying them out.
  • CONFIRMATION COPY Apply a load to the granulate, e.g. centrifugal dryer. Under the influence of this load, the projections are knocked off the cooled granulate, which creates a considerable amount of dust-like abrasion. The granulate is then fed to a wind sifter with the aid of a pneumatic conveyor, which is used to separate the dust-like abrasion.
  • the plastic granules produced by the known method meet the usual requirements. In certain applications, for example in the extrusion of breakdown-resistant cable insulation, the purity of the product may no longer be sufficient. Any contamination of the granules increases the reject rate in these applications.
  • the present invention has for its object to increase the purity of granules made of polymeric materials.
  • the object is achieved in that the granules after the first drying process in at least one washing process in a cleaning subjected to liquid and the cleaning liquid is subsequently separated from the granulate in at least one further drying process.
  • Washing the granules does not preclude the product from being subjected to additional cleaning processes following the first drying process, in particular the air separation which is known per se.
  • the first drying process is preferably designed such that the projections on the granules are reliably knocked off due to high mechanical loads.
  • the associated formation of metallic or polymeric abrasion is of no importance for the quality of the granules due to the subsequent washing process.
  • a curved screen with a subsequent centrifugal dryer can be used.
  • the formation of abrasion should be avoided in particular by keeping the mechanical loads on the granules low.
  • particularly high-gloss polished sheet screens are suitable in connection with fluidized bed, fluidized bed, shaft or vacuum dryers. Since not only the projections on the granulate described, but also oversize or undersize grains and granule agglomerates impair the quality of the product, the granulate is subjected to a " further embodiment of the invention " , which is carried out in particular between the first drying process and the washing process can.
  • the dust-like abrasion is separated off via the cleaning liquid, it is preferable to subject it to careful filtering before it is fed back into the washing process. In certain applications, it is also advantageous to continuously remove part of the cleaning liquid during the washing process and, after filtering, to return it to the washing process via a separate circuit.
  • Fig. 1 shows an arrangement for washing the granules once
  • Fig. 2 shows an arrangement for multiple washing of the granules with previous wind classification
  • the arrangement shown in Figure 1 comprises an extruder 1, in which the polymer material to be granulated is heated and plasticized by means of external heat and friction.
  • a granulating tool 2 Provided in a granulating tool 2 is a nozzle plate 3 provided with a plurality of openings, in which the stream of plasticized polymer provided by the extruder at high pressure is divided into individual strands which are cut into granules by a rotating knife 4.
  • the cutting takes place in the exemplary embodiment in a coolant flow, which is provided by a pump 5 and conveys the granulate to a first drying device 6, in which the coolant is separated from the granulate.
  • the first drying device 6 comprises a separator 7 and a centrifugal dryer 8, in which the granulate is exposed to a rotating air stream. Due to the high mechanical loads, undesired projections on the granules are knocked off, which can result in a not inconsiderable amount of polymeric or metallic abrasion.
  • the granules are then passed through a sieve 9 and subjected to a washing process in a container 11 provided with a stirrer 10 and filled with a cleaning liquid.
  • Purified water for example, can be used as the cleaning liquid.
  • Additives such as surfactants or alcohols can serve to accelerate the detachment of the dust from the surface of the granulate and to keep the detached dust in the cleaning liquid in suspension.
  • the stream of granules, dust and cleaning liquid enters a further drying device 12, which comprises a separator 13 and a fluid bed dryer 14.
  • a separator 13 the cleaning liquid with the dust floating in it is separated from the granulate, which is subsequently gently handled in a continuously operating fluid bed dryer 14, that is to say largely avoiding mechanical loads to the permissible residual moisture is dried.
  • the granules are then packed in bags in a device (not shown) or filled into transport or storage containers.
  • a filter 15 is used to separate the dust-like constituents from the cleaning liquid, through which the cleaning liquid is pressed through the pipeline 16 by means of a pump 17 during the return to the washing process. Another part of the washed-out abrasion is separated off by a filter 18 which is arranged in a ring line 19. In this ring line 19, part of the cleaning liquid is continuously withdrawn from the container 11 by means of a pump 20 and is fed back into the container after the filtration.
  • the method for producing the granules according to FIG. 2 differs from the method explained in FIG. 1 in particular in that the granules are subjected to an additional screening in an air classifier 21 after being separated from the cooling liquid. Furthermore, a two-stage washing process is subsequently provided, in which the granules are subjected to cleaning one after the other in the containers 11, 11 ' . After each washing process, the suspension of granules, dust and cleaning liquid is supplied by means of a pump 22, 22 ' drying devices 12, 12 ' , in which the cleaning liquid used in each case is separated off.
  • the drying apparatus 12 used in the first washing process consists of a separator 13, while the last drying apparatus 12 'to a separator 13' and a plurality comprises discontinuously to be operated vacuum dryer 14 ', are fed via a branched pipe 23 in succession.
  • a pipeline 24 feeds the granules removed from the vacuum dryers 13 "to a packaging station, not shown.
  • the system components listed in the description do not include all devices suitable for carrying out the method according to the invention. In particular, the list of useful separators, dryers and devices for washing the granules is not exhaustive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Microbiology (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un procédé de production de granulats en matériaux polymères, qui comprend les étapes consistant à: plastifier le polymère, diviser les masses plastifiées en cordons individuels, découper les cordons individuels pour former un granulat, refroidir le granulat dans un liquide de refroidissement et séparer le liquide de refroidissement du granulat selon un premier processus de séchage. Le granulat est ensuite soumis au moins à un procédé de lavage dans un liquide de nettoyage qui est à son tour séparé du granulat selon au moins un autre processus de séchage. Au cours du premier processus de séchage, le granulat est, de préférence, exposé à une sollicitation mécanique élevée dans un tamis courbe derrière lequel est placé un sécheur centrifuge, grâce à laquelle les queues sont séparées des grains de granulat. L'autre processus de séchage, réalisé en particulier au moyen d'un tamis courbe derrière lequel est monté un sécheur à lit tourbillonnaire, à lit fluidisé, à couloir ou à vide, se fait de façon douce, dans une large mesure sans érosion.
PCT/EP1999/008403 1998-11-05 1999-11-03 Procede et dispositif pour la production de granulats en materiaux polymeres WO2000027603A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000580812A JP2002529271A (ja) 1998-11-05 1999-11-03 ポリマー材料から粒状材料を製造する方法及び装置
EP99957986A EP1045748A2 (fr) 1998-11-05 1999-11-03 Procede et dispositif pour la production de granulats en materiaux polymeres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19850885A DE19850885C1 (de) 1998-11-05 1998-11-05 Verfahren zum Herstellen von Granulaten aus polymeren Werkstoffen
DE19850885.9 1998-11-05

Publications (2)

Publication Number Publication Date
WO2000027603A1 true WO2000027603A1 (fr) 2000-05-18
WO2000027603B1 WO2000027603B1 (fr) 2000-07-06

Family

ID=7886704

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/008403 WO2000027603A1 (fr) 1998-11-05 1999-11-03 Procede et dispositif pour la production de granulats en materiaux polymeres

Country Status (4)

Country Link
EP (1) EP1045748A2 (fr)
JP (1) JP2002529271A (fr)
DE (1) DE19850885C1 (fr)
WO (1) WO2000027603A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1778454A1 (fr) * 2004-08-20 2007-05-02 Fonterra IP Limited Appareil d"extrusion et procede d"extrusion d"aliments a forte teneur en proteines
CN103552169A (zh) * 2013-11-25 2014-02-05 佛山欣涛新材料科技有限公司 一种热熔胶粒的流水线生产系统
WO2014179031A1 (fr) * 2013-05-01 2014-11-06 Invista North America S.A.R.L. Procédé et système de coupe au mouillé et de séchage de granulés de polyamide
CN112793037A (zh) * 2020-12-21 2021-05-14 雷丽 一种用于生产改性塑料的混合设备

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116910C1 (de) * 2001-04-05 2002-11-21 Coperion Waeschle Gmbh & Co Kg Verfahren und Vorrichtung zur Förderung von Kunststoff-Granulat
DE102004011325A1 (de) * 2004-03-09 2005-09-29 Coperion Waeschle Gmbh & Co. Kg Verfahren und Anlage zum Trocknen von Kunststoff-Granulat
DE102008023046A1 (de) 2008-05-09 2009-11-12 Coperion Gmbh Kunststoffgranulieranlage sowie Kunststoffgranulierverfahren
CN105109776B (zh) * 2015-09-06 2018-03-30 河北尚华塑料科技有限公司 高分子粒料筛选包装设备
CN112277186A (zh) * 2020-10-09 2021-01-29 长兴材料工业（广东）有限公司 一种低tg结晶共聚酯高效造粒系统
CN113458067A (zh) * 2021-07-12 2021-10-01 浙江摩天新材料有限公司 一种环保型mq硅树脂的制备装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578740A (en) * 1968-10-08 1971-05-18 Goodrich Gulf Chemical Inc Dewatering pelletizer apparatus
DE2948492A1 (de) * 1979-12-01 1981-06-04 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur herstellung einer von wasserloeslichen und/oder hygroskopischen salzen weitgehend freien isolierung fuer elektrische kabel
US4280303A (en) * 1980-05-01 1981-07-28 Hermann Weber Plastic pellet cleaning apparatus and method for optical lense molding
DE3631376C1 (de) * 1986-09-15 1988-05-11 Werner & Pfleiderer Kuehlvorrichtung fuer Kunststoffgranulat
DE3722684C1 (en) * 1987-07-09 1988-10-27 Werner & Pfleiderer Pelletising water tank
EP0410914A1 (fr) * 1989-07-27 1991-01-30 Eastman Chemical Company Particles coulables en matériaux collants dans leur état normal, et procédé pour sa préparation
US5098586A (en) * 1989-08-23 1992-03-24 Werner & Pfleiderer Gmbh Method for the gentle separation of granulate and water
EP0616856A1 (fr) * 1993-03-23 1994-09-28 Teijin Chemicals, Ltd. Méthode et appareil pour l'enlèvement de particules fines des granules en résine synthétique
DE19709553A1 (de) * 1997-03-07 1998-09-10 Targor Gmbh Verfahren zur Desodorierung von Polyolefingranulaten
US5895617A (en) * 1996-07-31 1999-04-20 The Japan Steel Works, Ltd. Method and apparatus for transporting underwater cut pellets

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578740A (en) * 1968-10-08 1971-05-18 Goodrich Gulf Chemical Inc Dewatering pelletizer apparatus
DE2948492A1 (de) * 1979-12-01 1981-06-04 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur herstellung einer von wasserloeslichen und/oder hygroskopischen salzen weitgehend freien isolierung fuer elektrische kabel
US4280303A (en) * 1980-05-01 1981-07-28 Hermann Weber Plastic pellet cleaning apparatus and method for optical lense molding
DE3631376C1 (de) * 1986-09-15 1988-05-11 Werner & Pfleiderer Kuehlvorrichtung fuer Kunststoffgranulat
DE3722684C1 (en) * 1987-07-09 1988-10-27 Werner & Pfleiderer Pelletising water tank
EP0410914A1 (fr) * 1989-07-27 1991-01-30 Eastman Chemical Company Particles coulables en matériaux collants dans leur état normal, et procédé pour sa préparation
US5098586A (en) * 1989-08-23 1992-03-24 Werner & Pfleiderer Gmbh Method for the gentle separation of granulate and water
EP0616856A1 (fr) * 1993-03-23 1994-09-28 Teijin Chemicals, Ltd. Méthode et appareil pour l'enlèvement de particules fines des granules en résine synthétique
US5895617A (en) * 1996-07-31 1999-04-20 The Japan Steel Works, Ltd. Method and apparatus for transporting underwater cut pellets
DE19709553A1 (de) * 1997-03-07 1998-09-10 Targor Gmbh Verfahren zur Desodorierung von Polyolefingranulaten

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1778454A1 (fr) * 2004-08-20 2007-05-02 Fonterra IP Limited Appareil d"extrusion et procede d"extrusion d"aliments a forte teneur en proteines
EP1778454A4 (fr) * 2004-08-20 2009-11-18 Fonterra Ip Ltd Appareil d"extrusion et procede d"extrusion d"aliments a forte teneur en proteines
WO2014179031A1 (fr) * 2013-05-01 2014-11-06 Invista North America S.A.R.L. Procédé et système de coupe au mouillé et de séchage de granulés de polyamide
CN103552169A (zh) * 2013-11-25 2014-02-05 佛山欣涛新材料科技有限公司 一种热熔胶粒的流水线生产系统
CN103552169B (zh) * 2013-11-25 2016-06-29 广东欣涛新材料科技股份有限公司 一种热熔胶粒的流水线生产系统
CN112793037A (zh) * 2020-12-21 2021-05-14 雷丽 一种用于生产改性塑料的混合设备

Also Published As

Publication number Publication date
EP1045748A2 (fr) 2000-10-25
DE19850885C1 (de) 2000-07-20
JP2002529271A (ja) 2002-09-10
WO2000027603B1 (fr) 2000-07-06

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