EP3034975B1 - Procédé et installation de séchage pour sécher matière à sécher - Google Patents

Procédé et installation de séchage pour sécher matière à sécher Download PDF

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Publication number
EP3034975B1
EP3034975B1 EP15194413.9A EP15194413A EP3034975B1 EP 3034975 B1 EP3034975 B1 EP 3034975B1 EP 15194413 A EP15194413 A EP 15194413A EP 3034975 B1 EP3034975 B1 EP 3034975B1
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EP
European Patent Office
Prior art keywords
drying
dried
residence time
drying container
container
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.)
Active
Application number
EP15194413.9A
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German (de)
English (en)
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EP3034975A1 (fr
Inventor
Thomas Schall
Jan Rojahn
Philip Glatzer
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.)
Phoenix Contact GmbH and Co KG
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Phoenix Contact GmbH and Co KG
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Application filed by Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Priority to PL15194413T priority Critical patent/PL3034975T3/pl
Publication of EP3034975A1 publication Critical patent/EP3034975A1/fr
Application granted granted Critical
Publication of EP3034975B1 publication Critical patent/EP3034975B1/fr
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods

Definitions

  • the present invention relates to a method and a drying plant for drying a material to be dried, in particular of plastic granules, by passing a drying medium through the material to be dried.
  • the plastic raw materials mostly present in the form of granules are dried before processing.
  • dry air serving as the drying medium flows through a drying container in drying systems known from the prior art, wherein the plastic granules are taken up in bulk in the drying container.
  • the drying container is designed as a funnel, from which the plastic granulate is successively discharged into a further processing device, for example a plasticizer.
  • the drying medium is introduced by means of a blower in the drying tank and flows around the particles of the plastic granules.
  • the drying medium flows through a regenerating agent, for example a so-called molecular sieve, through which the moisture contained in the drying medium is adsorbed.
  • a regenerating agent for example a so-called molecular sieve
  • the EP 1 006 329 A1 describes a process for drying plastic raw materials, in which a gaseous drying medium flows through drying material located in a drying container, the flow of the drying medium being pulsed. By an appropriate method, the drying process is increased in its efficiency. The drying container is always completely filled.
  • the FR 2 663 259 A1 describes a method and an apparatus for drying plastic bulk material.
  • the device comprises a drying container into which the bulk material to be dried is sucked from a storage container.
  • a level detector is provided, by means of which the level of the bulk material can be measured in the container.
  • the EP 2 447 027 A1 describes a process for drying plastic granules in a drying container by passing a drying medium, usually in the form of air.
  • a drying medium usually in the form of air.
  • a gas flow rate is determined, which is necessary for drying the plastic granules, so that the plastic granules are dried in the drying container according to the specifications.
  • plastic granules For further processing provided for plastic granules has a dependent on the ambient conditions moisture. This can lead to problems during further processing, for example in an injection molding process. Because too high a moisture content causes a hydrolytic degradation during the processing Surface defects of the injection-molded component in the form of streaks can lead. If the moisture content is too low, ie if the plastic granules are overdried, the melt viscosity of the plastic increases, which can cause decomposition streaks in the finished product.
  • the plastic granulate (drying material) provided for further processing be dried in such a way that it has a moisture content in an acceptable range for further processing.
  • This moisture content correlates with a residence time of the material to be dried in the drying container.
  • the known from the prior art drying equipment for drying of material to be dried are usually designed according to the maximum plastic granule consumption in order to ensure an acceptable pre-drying at maximum capacity.
  • the temperature of the drying medium in the flow and return is measured in the prior art. If the difference between the two temperatures is within a defined tolerance band, the drying temperature is lowered to a lower value.
  • a standby mode is activated. If fresh plastic granulate is sucked in again, or no plastic granules are removed from the drying container for a predetermined time, the standby mode is deactivated to prevent rewet of the plastic granules. The drying process is then continued with the original setting.
  • the stationary state of a moisture balance of a hygroscopic plastic depends mainly on the dryness of the ambient air, ie of the im Dryer set dew point. Since only the temperature is lowered in standby mode, this does not change the stationary state of the moisture balance, but only the drying speed. Consequently, an overdrying of the plastic granules by a long dwell time within the drying container is also possible.
  • the object underlying the present invention is to provide a method for drying a drying material in a drying container, which ensures a moisture content of the material to be dried within a predetermined moisture content regardless of the consumption of a further processing plant, which is downstream of a drying plant.
  • the present invention has the object to provide a drying plant with a drying container for drying drying material located in the drying container, which ensures a moisture content of the material to be dried within a predetermined moisture content regardless of the consumption of the drying plant downstream processing equipment.
  • process steps are thus arranged in the form of a repetitive loop and are repeated at predetermined intervals in order to adjust the actual residence time of the desired residence time reliably over a longer period of time and with changing consumption conditions.
  • An appropriate method ensures that regardless of the consumption of the drying plant downstream processing plant, the residence time of the material to be dried in the drying tank is always within a predetermined time range, so that the subsidized from the drying tank or from the drying plant plastic granules always has a moisture content within a predetermined Moisture range is.
  • the inventive method ensures that a control signal is output, which causes a filling of the drying container with Trocknungsgut. As a result, further drying material is conveyed into the drying container, so that the actual residence time is prolonged and consequently approaches the desired residence time.
  • the residual moisture of the plastic granules should preferably be between 0.04% and 0.10%, so that the plastic granules can then be easily further processed by a further processing facility. A corresponding residual moisture is achieved if, under normal drying conditions, the plastic granules remain between 2.5 hours and 8 hours in the drying tank.
  • the material to be dried can also be referred to as plastic granules and / or as plastic raw material.
  • the actual residence time is the calculated emptying time of the drying tank.
  • the consumption of the material to be dried is the consumption of a further processing device downstream of the drying container, for example a plasticizer.
  • the drying medium may be, for example, air which is adjusted to a predetermined temperature and humidity. However, it is of course also possible to use as the drying medium another gaseous drying medium.
  • the consumption of the material to be dried can be determined, for example, by means of a flow meter downstream of a drying container outlet downstream. It is also possible to provide a plurality of flowmeters, which are connected upstream of further processing devices.
  • the consumption of the material to be dried is determined by means of an MES system (Manufacturing Execution System).
  • An MES system is a link between the planning level of a company and the manufacturing level with the manufacturing / production processes.
  • the flow rate of the drying medium is adjusted by the drying tank.
  • the drying rate of the material to be dried is influenced, so that thereby the desired residence time of the material to be dried in the drying tank is changed.
  • the determination of the filling quantity and / or the mass of the material to be dried in the drying container is carried out by measuring and / or calculating the filling quantity or the mass of the material to be dried. More specifically, the determination of the amount in the drying container by measuring the level, that is, the filling level of the material to be dried in the drying tank and subsequent calculation of the filling quantity taking into account the geometry, in particular the cross-sectional geometry of the drying container and the density of the material to be dried takes place.
  • the determination of the mass of the material to be dried in the drying container can also be done by using a balance. By using a balance to determine the filling amount of the drying container, the material to be dried in the drying container may have any distribution, for example, form a pour cone, it being ensured that the filling quantity is reliably determined in this case.
  • the filling level or the filling amount of the material to be dried in the drying container can be determined in a variety of ways. For example, capacitive sensors can be used. Furthermore, ultrasonic sensors and / or light barriers can also be used to determine the filling quantity. With regard to the investigation procedure for determining the filling quantity of the material to be dried in the drying container and with regard to the use of different level sensors, there are no restrictions whatsoever.
  • the calculation of the actual residence time of the material to be dried in the drying container can be done by dividing the filling amount by the consumption amount. More specifically, the calculation of the actual residence time by dividing the mass of the drying material in the drying container by the consumption mass of the material to be dried by the drying tank downstream processing equipment done. The consumption quantity is given in mass per unit of time. Furthermore, it is possible to determine the actual residence time by dividing the volume of the material to be dried in the drying container by the consumption volume of the material to be dried. The consumption volume is given in volume per unit of time.
  • the method further comprises a method step for outputting a second control signal for stopping the filling of the drying container with material to be dried in the event that the actual residence time is equal to or greater than the desired residence time.
  • a corresponding method may be necessary for a drying plant in which a filling opening for the plastic granules in the drying container is not automatically closed in the absence of the control signal for filling the drying container.
  • the method comprises an initial step of inputting and / or setting the desired residence time of the material to be dried in the drying container. It is thereby achieved that a drying plant which uses or carries out the method according to the invention quickly reaches different drying material and / or different throughflow temperatures and moisture conditions of the drying medium can be adjusted by the drying material.
  • the object underlying the present invention is also achieved by a drying system with a drying container for drying drying material in the drying container by passing a drying medium through the material to be dried, the drying system a level sensor for determining the level of the material to be dried in the drying container and / or a weight sensor for Determining the weight of the material to be dried in the drying container.
  • the drying system has a control device, which is connected to the level sensor and / or the weight sensor via a signal line.
  • the control device is designed to receive a consumption signal representing the consumption of the material to be dried via the signal line and / or via a further signal line.
  • control device is designed to calculate an actual residence time of the material to be dried in the drying container based on the consumption of the material to be dried and the filling amount of the material to be dried and / or the mass of the material to be dried in the drying container, wherein the control device is further adapted to a control signal for filling of the drying container to output with drying material when the actual residence time is less than the desired residence time.
  • control device is designed to output a second control signal for stopping the filling of the drying container with material to be dried in the event that the actual residence time is equal to or greater than the desired residence time.
  • the residence time of the material to be dried in the drying tank is always within a predetermined time range, so that the conveyed from the drying tank or from the drying plant plastic granules always has a moisture content within a predetermined residual moisture range lies.
  • the actual residence time is less than the desired residence time, i. If the actual residence time of the material to be dried in the drying container is shorter than the desired residence time, which is linked to the desired moisture content of the material to be dried, then causes the control device of the drying system, that a control signal for filling the drying container is output with Trocknungsgut. As a result, further drying material is conveyed into the drying container, so that the actual residence time is prolonged and consequently approaches the desired residence time.
  • the control device is designed such that the determination of the level of the material to be dried in the drying container, the determination of the consumption of the material to be dried, the calculation of the actual residence time of the material to be dried in the drying tank based on the consumption of the material to be dried and the amount of material to be dried and the output of a control signal for filling the drying container with material to be dried, if the actual residence time is less than the desired residence time, be carried out repeatedly in the form of a repetitive loop.
  • a magnetic switch By outputting the control signal for filling the drying container, a magnetic switch can be actuated or activated, for example, by means of which a closure flap, which closes a filling opening of the drying container in its closed position, is transferred from its closed position into its open position.
  • the closure cap can be biased alternatively or additionally by means of a force spring device in its closed position.
  • the drying system may also be designed such that when a control signal for filling the drying container, the filling opening of the drying container is opened for a predetermined time, so that a predetermined amount of material to be dried is introduced into the drying container. After the predetermined time has elapsed, the closing flap automatically closes the filling opening of the drying container, whereupon the method steps described above are carried out again by the control device. In this way, a gradual adaptation of the actual residence time to the desired residence time takes place.
  • control signal for filling the drying container could also be a conveyor, such as a vacuum pump can be controlled, which causes a conveying of the material to be dried in the drying container.
  • the signal line may be an arbitrarily designed signal line, which may be formed, for example, wired or radio-based.
  • control device is designed to output a second control signal for stopping the filling of the drying container with material to be dried in the event that the actual residence time is equal to or greater than the desired residence time.
  • a suitably designed drying plant allows the use of a shutter that is not automatically transferred from the open position to its closed position when a control signal for filling the drying tank fails.
  • the level sensor is designed as a capacitive level sensor.
  • a corresponding design of the drying plant is structurally particularly simple and therefore inexpensive to implement, since corresponding level sensors are inexpensive to buy and can be easily implemented or installed in existing drying systems.
  • the level sensor extends parallel to a longitudinal axis of the drying container.
  • the level of the drying container can be determined continuously, i. not only only discrete filling states can be determined.
  • only a single level sensor is necessary to determine over the entire longitudinal extent of the drying tank whose level with Trocknungsgut.
  • the drying plant has a plurality of level sensors. This can increase the reliability.
  • the individual fill level sensors can be configured as light barriers, wherein in each case a light transmitter is arranged opposite a light receiver. Due to the large number of light barriers, there is a certain amount of redundancy, so that increased reliability is ensured.
  • the individual level sensors are arranged at different axial heights of the drying container.
  • a corresponding design of the drying plant is structurally simple.
  • the individual level sensors need not be arranged equidistant in the drying container, but the distances from adjacent level sensors may be smaller in the bottom region of the drying container than the distances of adjacent level sensors in the region of an upper lid of the drying container.
  • FIG. 1 shows a drying system 1 according to the invention, which has a drying container 10 for drying of drying material 30 located in the drying container 10.
  • the drying material 30 is dryable by passing through a drying medium. Any suitable gaseous drying medium, for example air, can be used as the drying medium.
  • the drying material 30 is usually a plastic raw material in the form of granules, which is also referred to as plastic granules 30.
  • the drying plant 1 has an inlet opening 11 for filling the drying container 10 with material to be dried 30 and an outlet opening 15 for removing the material to be dried 30 from the drying container 10. In the illustrated embodiment, the inlet opening 11 can be closed by means of an inlet flap 12.
  • a switch 13 is provided in the form of a magnetic switch 13, by means of which the inlet flap 12 between a in FIG. 1 shown Closed position and is pivotable at an open position.
  • the inlet opening 11 is in fluid communication with a suction power 14 for sucking drying material 30 from a storage volume (not shown).
  • the suction box 16 and thus also the outlet opening 15 are in fluid communication with an outlet line 17 for conveying the material to be dried to a further processing device (not shown).
  • the drying plant 1 has a fill level sensor 18 for determining the fill level of the drying container 10 with material 30 to be dried.
  • the level sensor 18 is designed as a capacitive level sensor 18.
  • other sensors such as acoustic or optical sensors (photoelectric sensors) can be used as level sensors 18.
  • the level sensor 18 extends parallel to a longitudinal axis of the drying container 10 over a large part of its total longitudinal extent. Consequently, with the level sensor 18, the level of the drying container 10 can be continuously determined between an (approximately) empty and a (fully) filled state.
  • the drying installation 1 has a control device 19, which is connected to the fill level sensor 18 via a signal line 20.
  • the signal line 20 as an electrical (galvanic) connection between the level sensor 18 and the controller 19 is shown.
  • 20 may be realized as a signal line 20 as a radio-based signal line.
  • the control device 19 receives from the level sensor 18 via the signal line 20 a signal representing the level of the drying container 10. Furthermore, the control device 19 receives a consumption signal, which represents a consumption of the material to be dried 30, via a further (second) signal line 21.
  • the consumption of the material to be dried 30 can be determined, for example, by means of a flow meter, which is not shown and arranged downstream of the outlet 16 or suction box 16 of the drying container 10. Furthermore, the consumption of the material to be dried 30 can also be determined by means of an MES system.
  • FIG. 1 it can be seen open in the control device 19 further signal lines 21, via which, for example, information about the flow of the drying medium through the drying container 1, the temperature of the drying medium and / or the moisture content of the drying medium can be transmitted to the control device 19.
  • a first method step S1 the consumption of the material to be dried 30 is determined.
  • a filling quantity of the material to be dried 30 in the drying container 10 is determined by means of the level sensor 18.
  • the control device 19 calculates an actual residence time IV of the item to be dried 30 in the drying container 10, taking into account the consumption of the item to be dried 30 and taking into account the capacity of the item to be dried 30 in the drying container 10.
  • the actual residence time corresponds while the actual residence time of the material to be dried 30 in the drying tank 10 and is determined by dividing the filling amount of the material to be dried 30 in the drying tank 10 by the consumption of the material to be dried 30. It is then checked whether the actual residence time IV is smaller than a desired residence time SV of the material to be dried 30 in the drying container 10th
  • the desired residence time SV is specific to the plastic granulate 30 and depends on the flow rate of the drying medium through the drying tank 10, on the temperature and the moisture content of the drying medium.
  • the desired residence time SV can be input to the control device 19 in a method step preceding the method step S1. This can be done for example by means of an input device, not shown here, which is connected to the control device 19.
  • the control device 19 outputs in a method step S4 a control signal for filling the drying container 10 with material 30 to be dried.
  • a signal is output to the magnetic switch 13 to open the inlet door 12 via a signal output line 22.
  • further drying material 30 is introduced into the drying container 10, thereby prolonging the actual residence time IV in the drying container 10.
  • the method steps are carried out again beginning at step S1 until the actual residence time IV is not less than the desired residence time SV.
  • no control signal for filling the drying container 10 is then output with 30 more drying because the actual residence time IV is sufficiently large, so that the drying material 30, regardless of the amount consumed by downstream processing equipment always has a predetermined and suitable for further processing residual moisture.
  • the drying plant 1 shown can be configured such that when receiving a control signal for filling the drying container 10 with 30 Trocknungsgut the magnetic switch 13 opens the inlet flap 12 for a predetermined time, so that a predetermined amount of Trocknungsgut 30 is filled into the drying tank 10, after which Inlet flap 12 is automatically closed. After filling the predetermined amount of drying material 30, the method steps S1 to S4 are carried out again until the actual residence time IV is no smaller than the desired residence time SV. A corresponding procedure leads to a stepwise adaptation of the actual residence time IV to the desired residence time SV.
  • the control device 19 is adapted to output a second control signal for stopping the filling of the drying container 10 with the material to be dried 30, if the actual residence time IV is equal to or greater than the desired residence time SV. If the actual residence time IV is equal to or greater than the desired residence time SV, then in a method step S5 a second control signal for stopping the filling of the drying container 10 with material 30 to be dried is output. Upon receipt of this signal, the switch 13 transfers the inlet door 12 from its open position their closed position. The remainder of the operation of the controller 19 is identical to that described with reference to FIG. 2a explained operation of the control device 19 so that a repetitive description is avoided.
  • FIG. 3 the realized control loop of the drying plant 1 is shown.
  • the desired residence time SV is compared with the actual residence time IV. More specifically, the difference .DELTA.t between the actual residence time IV and target residence time SV is formed.
  • This result .DELTA.t is further processed by a control software contained in the control device 19 together with further information, which are indicated by arrows opening into the control device 19.
  • the control software then outputs to a conveyor system 25 control data. If the difference ⁇ t ⁇ 0, ie if the actual residence time IV (emptying time) is greater than the desired residence time SV, then a mass m F ⁇ of the material to be dried 30 is fed into the dryer 10. By filling the material to be dried 30 in the drying tank 10, the level h increases.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Claims (7)

  1. Procédé de séchage d'une matière à sécher (30) se trouvant dans un récipient de séchage (10) par écoulement d'un fluide de séchage à travers la matière à sécher (30), lequel procédé comprend les étapes se répétant suivantes :
    - déterminer une consommation de la matière à sécher (30) au moyen d'un système d'exécution de la fabrication (MES) et d'une quantité de remplissage et/ou d'une masse de la matière à sécher (30) dans le récipient de séchage (10) ;
    - calculer un temps de séjour réel (IV) de la matière à sécher (30) dans le récipient de séchage (10) en prenant en compte la consommation de la matière à sécher (30) et en prenant en compte la quantité de remplissage de la matière à sécher (30) et/ou la masse de la matière à sécher (30) dans le récipient de séchage (10) ; et
    - délivrer un signal de commande pour le remplissage du récipient de séchage (10) avec de la matière à sécher (30) dans le cas où le temps de séjour réel (IV) est inférieur au temps de séjour de consigne (SV),
    le procédé comprenant en outre une étape de délivrance d'un deuxième signal de commande pour arrêter le remplissage du récipient de séchage (10) avec de la matière à sécher (30) dans le cas où le temps de séjour réel (IV) est supérieur ou égal au temps de séjour de consigne (SV).
  2. Procédé selon la revendication 1, caractérisé en ce que le procédé comprend une étape initiale d'entrée et/ou de réglage du temps de séjour de consigne (SV) de la matière à sécher (30) dans le récipient de séchage (10).
  3. Installation de séchage (1) comprenant un récipient de séchage (10) pour le séchage de la matière à sécher (30) se trouvant dans le récipient de séchage (10) par écoulement d'un fluide de séchage à travers la matière à sécher (30), laquelle installation présente les caractéristiques suivantes :
    - l'installation de séchage (1) comprend un capteur de niveau de remplissage (18) pour la détermination du niveau de remplissage de la matière à sécher (30) dans le récipient de séchage (10) et/ou comprend un capteur de poids pour la détermination du poids de la matière à sécher (30) dans le récipient de séchage (10) ;
    - l'installation de séchage (1) comprend un dispositif de commande (19) qui est relié au capteur de niveau de remplissage (18) et/ou au capteur de poids par le biais d'une ligne d'acheminement de signaux (20) ;
    - le dispositif de commande (19) est conçu pour, par le biais de la ligne d'acheminement de signaux (20) et/ou par le biais d'une autre ligne d'acheminement de signaux (21), recevoir un signal de consommation en provenance d'un système MES, lequel signal de consommation représente une consommation de la matière à sécher (30) ;
    - le dispositif de commande (19) est conçu pour, sur la base de la consommation de la matière à sécher (30) et de la quantité de remplissage de la matière à sécher (30) et/ou de la masse de la matière à sécher (30) dans le récipient de séchage (10), calculer un temps de séjour réel (IV) de la matière à sécher (30) dans le récipient de séchage (10), et est en outre conçu pour, lorsque le temps de séjour réel (IV) est inférieur à un temps de séjour de consigne (SV), délivrer un signal de commande pour le remplissage du récipient de séchage (10) avec de la matière à sécher (30) ; et
    - le dispositif de commande (19) est conçu pour délivrer un deuxième signal de commande pour arrêter le remplissage du récipient de séchage (10) avec de la matière à sécher (30) dans le cas où le temps de séjour réel (IV) est supérieur ou égal au temps de séjour de consigne (SV).
  4. Installation de séchage (1) selon la revendication 3, caractérisée en ce que le capteur de niveau de remplissage (18) est conçu en tant que capteur de niveau de remplissage capacitif (18).
  5. Installation de séchage (1) selon la revendication 4, caractérisée en ce que le capteur de niveau de remplissage (18) s'étend parallèlement à un axe longitudinal du récipient de séchage (10).
  6. Installation de séchage (1) selon les revendications 3 à 5, caractérisée en ce que l'installation de séchage (1) comprend une pluralité de capteurs de niveau de remplissage (18) .
  7. Installation de séchage (1) selon la revendication 6, caractérisée en ce que les capteurs de niveau de remplissage (18) sont disposés à différentes hauteurs axiales du récipient de séchage (10).
EP15194413.9A 2014-12-16 2015-11-13 Procédé et installation de séchage pour sécher matière à sécher Active EP3034975B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15194413T PL3034975T3 (pl) 2014-12-16 2015-11-13 Sposób i urządzenie suszarnicze do suszenia materiału suszonego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014118742.3A DE102014118742A1 (de) 2014-12-16 2014-12-16 Verfahren und Trocknungsanlage zum Trocknen von Kunststoffgranulat

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EP3034975A1 EP3034975A1 (fr) 2016-06-22
EP3034975B1 true EP3034975B1 (fr) 2019-03-27

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EP (1) EP3034975B1 (fr)
DE (1) DE102014118742A1 (fr)
ES (1) ES2727935T3 (fr)
PL (1) PL3034975T3 (fr)

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US20220341662A1 (en) * 2019-06-12 2022-10-27 Wittmann Technology Gmbh Method for drying bulk materials, in particular solids, such as granulates, powders, grains, foils, shavings or the like, preferably plastic granulate

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PL3034975T3 (pl) 2019-09-30
DE102014118742A1 (de) 2016-06-16
EP3034975A1 (fr) 2016-06-22

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