WO2023174825A1 - Dispositif de séchage pour granulés de polymère - Google Patents

Dispositif de séchage pour granulés de polymère Download PDF

Info

Publication number
WO2023174825A1
WO2023174825A1 PCT/EP2023/056201 EP2023056201W WO2023174825A1 WO 2023174825 A1 WO2023174825 A1 WO 2023174825A1 EP 2023056201 W EP2023056201 W EP 2023056201W WO 2023174825 A1 WO2023174825 A1 WO 2023174825A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid feed
feed
wall
fluid
distance
Prior art date
Application number
PCT/EP2023/056201
Other languages
German (de)
English (en)
Inventor
Andreas Rogowski
Original Assignee
Uhde Inventa-Fischer Gmbh
Thyssenkrupp Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102022202630.6A external-priority patent/DE102022202630A1/de
Priority claimed from BE20225187A external-priority patent/BE1030363B1/de
Application filed by Uhde Inventa-Fischer Gmbh, Thyssenkrupp Ag filed Critical Uhde Inventa-Fischer Gmbh
Publication of WO2023174825A1 publication Critical patent/WO2023174825A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • 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
    • B29B9/16—Auxiliary treatment of granules

Definitions

  • the invention relates to a device for drying polymer granules.
  • Polyamide conditioning is known from EP 2 671 902 B1.
  • a continuous process for multi-stage drying and post-condensation of polyamide granules is known from WO 2009/153 340 A1.
  • the product homogeneity of granules is very much determined by the residence time distribution of the granules and by the residence time distribution of the gas within the device.
  • the gas can be fed to the granules in countercurrent or cocurrent.
  • conventional construction according to the current design results in zones with slower flow and zones with faster flow.
  • Capacities of more than, for example 100 t/d for polyamide could therefore only be served with two machines operated in parallel.
  • the object of the invention is to create a flow profile for gas and granules that achieves particularly uniform drying.
  • the trickle device according to the invention is suitable for a particulate material.
  • Such trickle devices are used as a drying device, condensation device, post-condensation device, conditioning device or as a silo device.
  • the particulate material is particularly preferably a polymer granulate, in particular polyamide, polyethylene terephthalate, polylactide and their copolymers.
  • the trickle device is used to process these polymers after their production.
  • the trickle device has a feed area, a middle area and an output area.
  • the particulate material is fed into the feed area, then trickles through the middle area and then ends up at the bottom of the output area where it can be removed from the trickle device.
  • the outlet for the particulate material is preferably arranged centrally on the underside. Therefore, the feed area is arranged above and immediately adjacent to the middle area and the middle area is arranged above and immediately adjacent to the output area.
  • the trickle device has an outer wall.
  • the outer wall in the sense of the invention is to be understood as the outer boundary of the interior.
  • the outer wall can have further supporting structures, insulation layers, heat transfer surfaces or the like on the outside, which, however, are not part of the outer wall in the sense of the term of the invention.
  • the central area has a first axis of symmetry.
  • the central axis of the cylinder is the axis of symmetry. This runs vertically in the longitudinal direction through the central area. This would also be the case for a polygonal cross-section, for example a square, hexagonal or octagonal cross-section.
  • a first body is arranged at least in the central region.
  • the first body extends the entire length of the midsection, from top to bottom.
  • the first body also has a second axis of symmetry. What was said about the cross section and axis of symmetry of the outer wall applies accordingly here.
  • the first axis of symmetry and the second axis of symmetry are identical, so they lie exactly on top of each other. For example, if both have a circular cross section, the center of both circular cross sections is at the same position.
  • the distance between the outer wall and the first body is constant in the middle area. This means that the first body can taper, for example, in which case the taper also takes place in parallel in the outer wall, so that the residence time distribution is not negatively influenced by the constant distance.
  • At least a first fluid feed and an optional second fluid feed are arranged in the middle area or in the output area.
  • An arrangement in the output area is preferably carried out as directly as possible below the central area.
  • the fluid feeds serve to supply a fluid, in particular a gas, into the interior. On the one hand, this allows the particulate material to be fluidized. However, it is preferred that no fluidization is effected, but only drying. On the other hand, in the case of drying, a dry gas, for example nitrogen or dry air, is supplied in order to dry the particulate material.
  • the first fluid feed and the optional second fluid feed are designed to supply fluid across the surface across the cross section of the trickle device.
  • a flat supply in the sense of the invention is to be understood as a supply of fluid across the cross section, in particular perpendicular or inclined to the axis of symmetry, with several supply points being present along the radial course.
  • Examples of flat supply of fluids are, for example, several annular elements with several supply points along the respective ring, with the different rings each having different radii.
  • the elements for surface distribution can also not be ring-shaped; for example, they can be similar polygons of different sizes, for example hexagons with one common center.
  • the fluid feed can also be designed in a spiral shape.
  • the flat feed can have an inclination, in particular the fluid feed is inclined so that it is arranged higher on the outside than in the middle.
  • the flat supply can be carried out by double cone gassing, in which the fluid supply from the side is created by conical design of the jacket, a slot-shaped supply.
  • the fluid is supplied with a downward and inward velocity component, so that a flat distribution of the fluid is created.
  • the conical shape can already be part of the narrowing to a material removal arranged at the lower end.
  • This embodiment is particularly preferred for a fluid feed arranged at the lower end.
  • the double cone gassing is particularly preferably supplemented by an additional simultaneous fluid feed at the lower end of the first body.
  • the fluid can be fed in over the entire surface or in a structured manner, for example through side nozzles. If two fluid feeds arranged one above the other are used, the upper one is preferably not designed as a double cone gassing.
  • the fluid feed does not have to be arranged flat, i.e. perpendicular to the axis of symmetry.
  • the fluid feed can be designed such that it is higher on the outside, which is directed towards the outer wall, than on the side directed towards the first body. This is particularly preferred if the fluid feeds are firmly connected to the first body, but not to the outer wall, since this optimizes the flow of force.
  • the first fluid feed and the second fluid feed are arranged one above the other.
  • the first fluid feed is arranged in the upper 20% of the central region and the second fluid feed is arranged in the lower 20% of the central region.
  • the particulate material is in contact with the outer wall and with the first body. Of course, this also leads to heat transfer between the particulate material and the outer wall or the first body.
  • the particulate material may typically have a particle size of 1 to 5 mm. For example, the average particle size can be 2.5 mm.
  • the outer wall has a constant first cross section over the central region.
  • the central region for example and preferably, has a round cross section with a radius r.
  • the central region then has this round cross section with the radius r at every position along the longitudinal axis, resulting in the basic shape of a hollow cylinder.
  • the outer wall in the middle area would be a pipe with a constant diameter r.
  • the first body has a constant second cross section over the central region, analogous to the outer wall.
  • the diameter of the first body is at least as large as ten times the particle size of the particulate material, the particle size used being the size at which 50% of all particles are below the particle size (dpso).
  • the diameter of the first body is 0.1 to 0.2 times the diameter of the outer wall.
  • the first body and the outer wall consist of the same material, in particular stainless steel.
  • the outer wall consists of a first material, for example stainless steel, and the first body consists of a second material, for example Plexiglas.
  • the first material and the second material particularly preferably have a comparable roughness.
  • the ratio of the diameter of the outer wall to the diameter of the first body in the central region is in the range 5:1 to 10:1. This ratio is particularly preferably 8:1. This creates an optimum between equalization and reduction of the volume used for the particulate material.
  • the length of the first body in particular the length of the straight part of the first body, corresponds exactly to the length of the central region.
  • the first fluid feed and the second fluid feed are at a distance from the outer wall, the distance between the first fluid feed and the outer wall or the second fluid feed and the outer wall being at least 10 times, preferably 20 times Particle size of the particulate material corresponds, with the particle size used being the size at which 50% of all particles are below the particle size (dpso).
  • the first fluid feed and the second fluid feed have a distance from the first body, the distance between the first fluid feed and the first body or the second fluid feed and the first body being at least 10 times, preferably 20 times, the particle size of the particulate material, whereby the particle size used is the size at which 50% of all particles are below the particle size (dpso).
  • first fluid feed and the second fluid feed consist of different elements, for example annular elements, these elements preferably also have a distance from one another which is at least 10 times, preferably 20 times, the particle size of the particulate material, the particle size being the Size is used where 50% of all particles are below the particle size (dpso).
  • the first fluid feed and the second fluid feed have a distance from the outer wall, the distance between the first fluid feed and the outer wall or the second fluid feed and the outer wall corresponding to a maximum of 120 times the particle size of the particulate material, where The particle size used is the size at which 50% of all particles are below the particle size (dpso).
  • the first fluid feed and the second fluid feed are at a distance from the first body, wherein the distance between the first fluid feed and the first body or the second fluid feed and the first body corresponds to a maximum of 120 times the particle size of the particulate material, the size being used as the particle size at which 50% of all particles are below the particle size ( d P so).
  • first fluid feed and the second fluid feed consist of different elements, for example annular elements, these elements are preferably also at a distance from one another which is at most 120 times the particle size of the particulate material, the size being 50 being used as the particle size % of all particles are below the particle size (d P so), corresponds.
  • the first fluid feed and the second fluid feed have a distance from the outer wall, the distance between the first fluid feed and the outer wall or the second fluid feed and the outer wall corresponding to 80 times the particle size of the particulate material, where as Particle size the size is used at which 50% of all particles are below the particle size (d P 5o).
  • the first fluid feed and the second fluid feed have a distance from the first body, the distance between the first fluid feed and the first body or the second fluid feed and the first body corresponding to 80 times the particle size of the particulate material, the particle size being the Size is used where 50% of all particles are below the particle size (d P 5o).
  • first fluid feed and the second fluid feed consist of different elements, for example annular elements, these elements are preferably also at a distance from one another which is 80 times the particle size of the particulate material, the particle size used being the size at which 50% of all particles are below the particle size (d P 5o).
  • the trickle device has a third fluid feed, wherein the third fluid feed is preferably arranged in the middle of the central region (center ⁇ 10%).
  • the first body has a conical shape in the feed area, with the tip pointing upwards. This achieves a good distribution of the particulate material and no accumulation of particulate material forms on the first body.
  • the tip of the first body has a distance from the material feed in the feed area, the distance between the tip and the material feed corresponding to 50 times to 300 times the particle size of the particulate material, the size being used as the particle size where 50% of all particles are below the particle size (dpso).
  • the distance between the tip and the material feed preferably corresponds to 200 times the particle size of the particulate material.
  • first fluid feed and the second fluid feed are designed to be rotationally symmetrical, in particular annular or polygonal, particularly preferably in the form of several concentric rings with different diameters.
  • the fluid feed is designed in a spiral shape.
  • the spiral-shaped fluid feed preferably has an inclination, with the outside preferably being higher than the inside.
  • the distance between the different areas of the spirals corresponds to 50 to 100 times, particularly preferably 80 times, the particle size of the particulate material corresponds, whereby the particle size used is the size at which 50% of all particles are below the particle size (dpso).
  • the trickle device has a fluid supply to the first fluid feed and to the second fluid feed, the fluid feed being arranged in the first body. Through the fluid supply, the fluid supplied from the outside reaches the fluid feeds and thus into the interior of the trickle device.
  • the first body in the feed area is connected to the outer wall in a load-bearing manner. The first body is thus arranged practically hanging inside. The advantage is that the flow of the particulate material is irregular in the feed area, but is no longer disturbed by supporting structures in the lower area.
  • the first body is connected to the outer wall in the output area.
  • the first body is supported thereby.
  • the first body is connected to the outer wall in the feed area in a load-bearing manner and is connected to the outer wall in the output area. This achieves optimal attachment with minimal disruption to the flow in the central area.
  • the fluid supply is partially arranged in the connection between the first body and the outer wall in the feed area.
  • the trickle device is a drying device.
  • the first body can also have a more complex structure.
  • the first body can be constructed from three tubular partial bodies that are connected to one another and constructed symmetrically about the axis of symmetry.
  • the volume flow of the particulate material is preferably set so that the ratio of the internal volume to the volume flow is between 2 and 25, preferably between 3 and 20, particularly preferably around 18. This means that the particulate material has an average residence time of 2 to 25, preferably 3 to 20, particularly preferably 18 hours.
  • Fig. 1 first exemplary longitudinal section
  • Fig. 2 first exemplary cross section
  • a first exemplary longitudinal section of a trickle device 10 is shown in FIG.
  • the trickle device 10 has a feed area 20 arranged at the top, a middle area 30 arranged underneath and an output area 40 arranged at the very bottom.
  • a material feed 130 opens into the feed area 20, via which particulate material can be fed.
  • the particulate material then trickles through the trickle device 10 and can then be removed again by a material removal 140 that opens into the output area 40.
  • the trickle device 10 has an axis of symmetry 60.
  • the first body 70 also lies on this axis of symmetry 60, which is connected to the outer wall 50 of the trickle device 10 via load-bearing connections 120 in the feed area 20 and is thus held mechanically.
  • a first fluid feed 80 and a second fluid feed 90 are arranged on the first body 70.
  • the first body 70 has a conical tip 100, so that the particulate material, which is introduced from the material feed 130 into the trickle device 10, is safely guided into the central area 30.
  • the conical tip 100 has an angle of 20° to 120°, preferably 40°, at the tip.
  • the output area 40 can have an angle of 10° to 60°, preferably 45°.
  • the trickle device 10 has a fluid supply 110.
  • the fluid is guided via a supporting connection 120 and the first body 70 into the two fluid feeds 80, 90 and there through fluid outlets, which are advantageously arranged on the underside of the two fluid feeds 80, 90, into the interior of the trickle device 10 headed.
  • Fig. 2 and Fig. 3 two different possible exemplary cross sections along AA in Fig. 1 are shown.
  • Fig. 2 shows a round cross section of the outer wall 50 and a round cross section of the first body 70.
  • the first fluid feed 80 consists of two annular components and four struts. These two annular components and preferably also the struts have fluid outlets on the underside.
  • FIG. 3 A second alternative cross section is shown in Fig. 3.
  • the outer wall 50 and the first body 70 have a round cross section, as in the first example shown.
  • the first fluid feed 80 is designed in a hexagonal shape, which simplifies production of the first fluid feed 80.
  • the second exemplary longitudinal section shown in FIG. 4 differs from the first exemplary longitudinal section shown in FIG. 1 in that the two fluid feeds 80, 90 have an inclination. As a result, forces can be better dissipated into the first body 70 by the particulate material striking from above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

L'invention concerne un dispositif de ruissellement (10) pour une matière particulaire, le dispositif de ruissellement (10) ayant une région d'alimentation (20), une région centrale (30) et une région de distribution (40), la région d'alimentation (20) étant agencée au-dessus et directement de manière adjacente à la région centrale (30), la région centrale (30) étant agencée au-dessus et directement de manière adjacente à la région de distribution (40), le dispositif de ruissellement (10) ayant une paroi externe (50), la région centrale (30) ayant un premier axe de symétrie (60), un premier corps (70) étant agencé au moins dans la région centrale (30), le premier corps (70) s'étendant sur toute la longueur de la région centrale (30), le premier corps (70) ayant un second axe de symétrie (60), le premier axe de symétrie (60) et le second axe de symétrie (60) étant coaxiaux, la distance entre la paroi externe (50) et le premier corps (70) dans la région centrale étant constante, au moins une première alimentation en fluide (80) et une seconde alimentation en fluide facultative (90) étant agencées dans la région centrale (30), la première alimentation en fluide (80) et la seconde alimentation en fluide facultative (90) étant conçues pour fournir une alimentation uniforme en fluide sur la section transversale du dispositif de ruissellement (10).
PCT/EP2023/056201 2022-03-17 2023-03-10 Dispositif de séchage pour granulés de polymère WO2023174825A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102022202630.6 2022-03-17
DE102022202630.6A DE102022202630A1 (de) 2022-03-17 2022-03-17 Trocknungsvorrichtung für Polymergranulate
BE20225187A BE1030363B1 (de) 2022-03-17 2022-03-17 Trocknungsvorrichtung für Polymergranulate
BEBE2022/5187 2022-03-17

Publications (1)

Publication Number Publication Date
WO2023174825A1 true WO2023174825A1 (fr) 2023-09-21

Family

ID=85640615

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/056201 WO2023174825A1 (fr) 2022-03-17 2023-03-10 Dispositif de séchage pour granulés de polymère

Country Status (2)

Country Link
TW (1) TW202337968A (fr)
WO (1) WO2023174825A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923061C1 (fr) 1989-07-13 1990-07-26 Basf Ag, 6700 Ludwigshafen, De
US5558678A (en) * 1992-11-13 1996-09-24 Karl Fischer Industrieanlagen Gmbh Process and apparatus for continuous crystallization of plastic granules
US5797989A (en) * 1995-01-09 1998-08-25 Buehler Ag Apparatus for the continuous crystallization of polyester materials
CN1779400A (zh) * 2004-10-18 2006-05-31 莫雷多股份公司 用于松散颗粒物质除湿的料斗
US20090163694A1 (en) 2007-12-21 2009-06-25 Michael Gann Process for the continuous production of high efficient aqueous amino formaldehyde resin solutions
WO2009153340A1 (fr) 2008-06-20 2009-12-23 Basf Se Procédé continu de séchage et post-condensation en plusieurs étapes d’un granulat de polyamide
CN102374760A (zh) * 2010-08-03 2012-03-14 莫雷托股份公司 用于颗粒状塑料材料除湿的除湿设备和方法及料斗结构
EP2671902B1 (fr) 2012-06-05 2018-01-03 Polymetrix AG Conditionnement de polyamide
EP3722717B1 (fr) * 2019-04-08 2021-12-22 Piovan S.P.A. Trémie pour le conditionnement thermique de matières plastiques, installation comprenant une telle trémie et procédé d'utilisation d'une telle trémie

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923061C1 (fr) 1989-07-13 1990-07-26 Basf Ag, 6700 Ludwigshafen, De
US5558678A (en) * 1992-11-13 1996-09-24 Karl Fischer Industrieanlagen Gmbh Process and apparatus for continuous crystallization of plastic granules
US5797989A (en) * 1995-01-09 1998-08-25 Buehler Ag Apparatus for the continuous crystallization of polyester materials
CN1779400A (zh) * 2004-10-18 2006-05-31 莫雷多股份公司 用于松散颗粒物质除湿的料斗
US20090163694A1 (en) 2007-12-21 2009-06-25 Michael Gann Process for the continuous production of high efficient aqueous amino formaldehyde resin solutions
WO2009153340A1 (fr) 2008-06-20 2009-12-23 Basf Se Procédé continu de séchage et post-condensation en plusieurs étapes d’un granulat de polyamide
CN102374760A (zh) * 2010-08-03 2012-03-14 莫雷托股份公司 用于颗粒状塑料材料除湿的除湿设备和方法及料斗结构
EP2671902B1 (fr) 2012-06-05 2018-01-03 Polymetrix AG Conditionnement de polyamide
EP3722717B1 (fr) * 2019-04-08 2021-12-22 Piovan S.P.A. Trémie pour le conditionnement thermique de matières plastiques, installation comprenant une telle trémie et procédé d'utilisation d'une telle trémie

Also Published As

Publication number Publication date
TW202337968A (zh) 2023-10-01

Similar Documents

Publication Publication Date Title
EP0332929B2 (fr) Procédé et dispositif pour la granulation dans un lit fluidisé
WO2012055388A2 (fr) Broyeur à boulets avec agitateur
EP0451546A2 (fr) Tour de traitement d'un matériau pulvérulent ou granuleux, et procédé pour sa mise en oeuvre
WO2001037980A2 (fr) Dispositif de revetement de particules
EP2981352A2 (fr) Carrousel pour séchoir rotatif et procédé pour traiter des particules solides
EP2159526A2 (fr) Installation de traitement pour produits en vrac
WO2018054698A1 (fr) Dispositif et procédé de production de matières plastiques pulvérulentes structurées sphériques
DE2330160A1 (de) Verteilungsvorrichtung
BE1030363B1 (de) Trocknungsvorrichtung für Polymergranulate
EP3157665A1 (fr) Dispositif pour l'introduction de gouttes d'une solution monomérique dans un réacteur
WO2014131803A1 (fr) Dispositif de chargement de matériau catalyseur dans des réacteurs, en particulier radiaux
WO2023174825A1 (fr) Dispositif de séchage pour granulés de polymère
DE102022202630A1 (de) Trocknungsvorrichtung für Polymergranulate
EP0089486B1 (fr) Colonne à plusieurs enceintes fluidisées
DE69916328T2 (de) Vorrichtung zum dispergieren von schüttgut im innenraum eines behälters
EP1288600B1 (fr) Dispositif de séchage d'un matériau en vrac en contre-courant avec un fluide gazeux
CH430397A (de) Gravimetrische Ausgleichseinrichtung für Schüttgüter
EP2720785B1 (fr) Dispositif destiné au traitement de matières particulaires
EP0410229B1 (fr) Broyeur agitateur pour le microbroyage
EP2490797B1 (fr) Dispositif de traitement de produit particulaire comprenant une base de circulation à double flux
EP3157962B1 (fr) Dispositif de fabrication de poly(méth)acrylate pulvérulent
WO2017085093A1 (fr) Dispositif servant à produire du poly(méth)acrylate pulvérulent
AT392015B (de) Ruehrvorrichtung fuer wirbelschichten mit klassierendem abzug
CN218700433U (zh) 用于颗粒状材料的流动装置
DE10104184B4 (de) Verfahren zum Behandeln eines partikelförmigen Guts mit einem Überzugsmedium sowie Vorrichtung zur Durchführung eines derartigen Verfahrens

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23711012

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202437053293

Country of ref document: IN