EP1067348B1 - Procédé et dispositif de séchage de granulat - Google Patents

Procédé et dispositif de séchage de granulat Download PDF

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Publication number
EP1067348B1
EP1067348B1 EP00112648A EP00112648A EP1067348B1 EP 1067348 B1 EP1067348 B1 EP 1067348B1 EP 00112648 A EP00112648 A EP 00112648A EP 00112648 A EP00112648 A EP 00112648A EP 1067348 B1 EP1067348 B1 EP 1067348B1
Authority
EP
European Patent Office
Prior art keywords
drying
drying air
individual
heating device
containers
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.)
Expired - Lifetime
Application number
EP00112648A
Other languages
German (de)
English (en)
Other versions
EP1067348A1 (fr
Inventor
Andreas Vierling
Gerd Adolf Richter
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.)
Colortronic GmbH
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Colortronic 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 Colortronic GmbH filed Critical Colortronic GmbH
Publication of EP1067348A1 publication Critical patent/EP1067348A1/fr
Application granted granted Critical
Publication of EP1067348B1 publication Critical patent/EP1067348B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/083—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area

Definitions

  • the invention relates to a method for drying Granules in at least two drying containers using heated Drying air through the drying container connected in parallel and circulated through a drying air dryer , each drying air stream supplied to a drying tank with one assigned to this drying container Individual heating device is heated and the individual drying container supplied drying air flow depending on one of the current conditions in the concerned Drying container reflecting temperature more or less is throttled.
  • Such a method is known from EP 61 161 A.
  • There are three drying containers connected in parallel are provided, in their Branch line inlet one throttle each before Drying container is installed, which is controlled by an actuator Depending on the signal from a temperature sensor, which is arranged in the branch line outlet behind the drying container is.
  • the drying air dryer has adsorption cells on, through which the circulating drying air and a Regeneration agents (hot air) are passed through. Indeed only one common heating device is provided and at the exit of the drying air dryer is the drying air passed through the only heater before entering the Flow line to the drying containers enters.
  • the method described at the outset is known from DE 296 21 313 U.
  • the drying system described there has three in parallel switched on drying containers, each with a single heating device and a throttle device for that Drying container supplied drying air assigned are. It is therefore possible to use the drying container To feed drying air of different temperatures, which is useful, for example, if in the individual Drying containers can be dried different materials should, because of different temperature sensitivity different temperatures should be dried. There however, the air volume distribution over the individual drying containers by the extent of the throttling of the individual drying containers supplied drying air flows is determined, the situation may arise that one of the individual heating devices excessively strong with a high drying air flow is claimed so that the intended heating temperature the drying air may no longer be reached. To the Maintain the setpoint temperature in all operating states may need to be over-performing disadvantageously and thus complex individual heating devices are used become.
  • the invention is based on the object to improve known methods so that for the individual Drying container drying air of different temperatures can be provided and the target temperatures of the various drying air flows under all operating conditions can be achieved without being overly powerful Heaters must be used.
  • drying air flows not only temperature-dependent but also dependent of the respective heating output of the individual heating device in question be controlled so that when reaching predetermined heating power of the individual heater relevant drying air flow is additionally throttled, so that its heating to a preselected target temperature is independent from the distribution of drying air to the individual Drying air flows is guaranteed.
  • the provision of the individual heating devices creates the possibility the drying air flows supplied to the various drying containers according to the respective requirements to heat different temperatures. Will the capacity of a single heater because the concerned Drying air flow due to severe throttling of the others Drying air flows increases sharply and / or for the person concerned Drying air flow a comparatively high target temperature is specified, the drying air flow concerned experiences throttling until the ratio of drying air flow sufficient for the available heating capacity, to achieve the target temperature. Therefore, oversized Individual heating devices can be dispensed with without that there is a risk that under extreme operating conditions the target temperature of the drying air on one of the drying tanks is not reached.
  • the method according to the invention becomes dependent on the use of Individual heating devices that can be switched on and off automatically Conveniently carried out so that the heat output dependent Additional throttling of a drying air flow is triggered when the individual heating device in question does not turn off within a predetermined period of time.
  • the continuous operation of the individual heating device ascertained during the period is evaluated in the sense that the heating power not sufficient for the current drying air throughput to reach the target temperature.
  • the invention also relates to a device for performing of the method according to the invention with at least two Drying containers and a drying air dryer, which in a drying circuit for drying air having a blower are installed, the one flow line and one Return line and these connecting branch lines for the parallel arrangement of the drying container, wherein in a throttle valve for each branch line inlet to the drying tank and one each assigned to this drying container Individual heating devices are installed and each drying container a temperature sensor is assigned, which is via a signal line with a control unit for adjusting the throttle valve connected is.
  • the known device improved according to the invention in that each individual heating device via a heating power signal line with the control unit for the throttle valve assigned to the same drying container connected is.
  • each Throttle valve in the individual heating device behind each Throttle valve arranged. This allows the individual heating device arrange close to the associated drying container, what the heat losses are reduced or the effort for insulation measures decreases. At the same time, the throttle valve is less heat stress.
  • the temperature sensors are each installed in the relevant drying container. In this way, reliable temperature values can be obtained achieve for the control of the device.
  • FIG. 1 An embodiment of a device according to the invention is explained in more detail below with the aid of a schematic drawing.
  • the only figure shows essentially one Top view of a device with two shown in side view Drying containers and with a drying air dryer.
  • the regeneration circuit 8 are one behind the other in the flow direction a suction filter 1, a regeneration blower 2, a Regeneration heater 3 and the two reversing valves 4a, 4b installed, between which two adsorption cells 5a, 5b are arranged are.
  • the two reversing valves 4a, 4b and the two adsorption cells 5a, 5b are also the drying cycle in the same way 9 assigned so that by reversing the reversing valves 4a, 4b the two adsorption cells 5a, 5b alternately in the Regeneration circuit 8 or switched on in the drying circuit 9 are.
  • the drying circuit 9 is with a blower 6 for the Drying air and provided with a filter 7 for the return air.
  • the drying circuit 9 includes a flow line 11 and a return line 12 for the circulating drying air and a first branch line with a branch line inlet 21 and a branch line outlet 28 and a second branch line with a branch line inlet 31 and a branch line outlet 38, each to the flow line 11 or to the return line 12 connected and through a first drying container 20 or a second drying container 30 with each other are connected.
  • the two drying containers 20 and 30 are used to dry granulate, which is known to and is dissipated, so that further explanations are not required are.
  • each branch line inlet 21, 31 contains one Throttle valve 22a, 32a and a single heater 23a, 33a.
  • the heating output is regulated so that the drying container 20, 30 supplied drying air if necessary the granulate to be dried has a set temperature.
  • a temperature sensor 23e, 33e arranged via a signal line 23d, 33d is connected to a control unit 23c, 33c, which the Heat supply through the heating line 23b, 33b to the individual heating device 23a, 33a controls.
  • the throttle valve 22a, 32a enables the air throughput to be adjusted to the granulate throughput through the drying container 20, 30 to in this optimal drying conditions (Drying temperatures). This is in the Drying container 20, 30 a temperature sensor 22e, 32e installed, the container temperature via a signal line 22d, 32d reports to a control unit 22c, 32c. This creates a Control signal for the throttle valve 22a, 32a, to this over a control line 22b, 32b is transmitted.
  • the control unit 23c, 33c for the heating power is via a signal line 24, 34 with the control unit 22c, 32c for the throttle valve 22a, 32a and supplies it with the heating power relevant data.
  • the granules filled in the drying containers 20, 30 at which are different materials with different materials Properties can be dealt with by the Drying circuit 9 by means of the blower 6 circulating drying air dried, for example by means of the adsorption cell 5b is continuously dehumidified.
  • the adsorption cell 5a in the regeneration circuit 8 arranged and is regenerated accordingly.
  • the reversing valves 4a, 4b switched, so that now the freshly regenerated adsorption cell 5a in the drying cycle 9 and the more or less exhausted adsorption cell 5b in Regeneration circuit 8 is and is now regenerated. This Switching between the adsorption cells 5a and 5b continues accordingly.
  • the drying containers 20, 30 individually supplied drying air in the individual heating devices 23b, 33b except for the one provided Target temperature heated.
  • 32e is determined temperature value the throttle valve 22a, 32a via the control unit 22c, 32c an optimal drying air throughput in the drying container concerned 20, 30 set.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Drying Of Solid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (4)

  1. Procédé de séchage de granulat dans au moins deux récipients de séchage (20, 30) au moyen d'air de séchage échauffé que l'on fait circuler à travers les récipients de séchage (20, 30) montés en parallèle et à travers un sécheur (10) d'air de séchage, chaque flux d'air de séchage apporté à un récipient de séchage (20, 30) étant échauffé par un équipement individuel de chauffage (23a, 33a) associé à ce récipient de séchage (20 ou 30), et le flux d'air de séchage apporté au récipient individuel de séchage (20, 30) étant respectivement plus ou moins étranglé en fonction d'une température reflétant les conditions momentanées dans le récipient de séchage concerné (20, 30), caractérisé en ce que les flux d'air de séchage sont commandés non seulement en fonction de la température mais aussi en fonction de la puissance de chauffage respective de l'équipement individuel de chauffage (23a, 33a) concerné, de telle sorte qu'à l'atteinte d'une puissance prédéterminée de chauffage de l'équipement individuel de chauffage (23a, 33a), le flux concerné d'air de chauffage subit un étranglement supplémentaire, de sorte que son échauffement à une température de consigne présélectionnée est garanti indépendamment de la répartition quantitative de l'air de séchage sur les flux individuels d'air de séchage.
  2. Procédé selon la revendication 1 avec des équipements individuels de chauffage (23a, 33a) pouvant être automatiquement activés et désactivés en fonction des besoins, caractérisé en ce que l'étranglement supplémentaire d'un flux d'air de séchage en fonction de la puissance de chauffage est déclenché si l'équipement individuel de chauffage (23a, 33a) concerné ne se désactive pas à l'intérieur d'un intervalle de temps prédéterminé.
  3. Dispositif pour la mise en oeuvre du procédé selon la revendication 1 ou 2, avec au moins deux récipients de séchage (20, 30) et un sécheur (10) d'air de séchage qui sont incorporés dans un circuit de séchage (9) pour l'air de séchage qui comprend une soufflante (6) et qui présente une conduite aller (11), une conduite de retour (12) et des conduites dérivées (21, 28; 21, 38) reliant les conduites précitées pour la disposition en parallèle des récipients de séchage (20, 30), un clapet d'étranglement (22a, 32a) et un équipement individuel de chauffage (23a, 33a) respectivement associé à chaque récipient de séchage (20, 30) étant incorporés dans chaque conduite dérivée d'amenée (21, 31) menant à ce récipient de séchage (20, 30) et un capteur de température (22e, 32e) étant associé à chaque récipient de séchage (20, 30), capteur qui est relié par l'intermédiaire d'une ligne de signaux (22d, 32d) à un appareil de commande (22c, 32c) pour régler le clapet d'étranglement (22a, 32a), caractérisé en ce que chaque équipement individuel de chauffage (23a, 33a) est relié par l'intermédiaire d'une ligne (24, 34) de signaux de puissance de chauffage à l'appareil de commande (22c, 32c) pour le clapet d'étranglement (22a, 32a) associé au récipient de séchage correspondant (20, 30).
  4. Dispositif selon la revendication 3, caractérisé en ce que l'équipement individuel de chauffage (23a, 33a) est disposé après le clapet d'étranglement (22a, 32a) dans chaque conduite dérivée d'amenée (21, 31).
EP00112648A 1999-07-07 2000-06-15 Procédé et dispositif de séchage de granulat Expired - Lifetime EP1067348B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19931357A DE19931357C1 (de) 1999-07-07 1999-07-07 Verfahren und Vorrichtung zum Trocknen von Granulat
DE19931357 1999-07-07

Publications (2)

Publication Number Publication Date
EP1067348A1 EP1067348A1 (fr) 2001-01-10
EP1067348B1 true EP1067348B1 (fr) 2003-08-20

Family

ID=7913946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00112648A Expired - Lifetime EP1067348B1 (fr) 1999-07-07 2000-06-15 Procédé et dispositif de séchage de granulat

Country Status (7)

Country Link
EP (1) EP1067348B1 (fr)
AT (1) ATE247812T1 (fr)
BR (1) BR0002304A (fr)
CA (1) CA2312511A1 (fr)
DE (2) DE19931357C1 (fr)
ES (1) ES2204403T3 (fr)
MX (1) MXPA00006721A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006049437B3 (de) * 2006-10-16 2008-03-27 Lanco Gmbh Vorrichtung zum Trocknen von Schüttgut sowie Verfahren zum Trocknen von Schüttgut unter Verwendung einer solchen Vorrichtung
EP2020581A1 (fr) * 2007-08-03 2009-02-04 Moretto S.P.A. Installation et procédé pour la déshumidification contrôlée de matière granulaire
DE102015005822A1 (de) * 2015-05-05 2016-11-10 Zbk Zentrum Für Baukeramik Gmbh Anlage und Verfahren zm Trocknen keramischer Rohstoffe oder Rohlinge
DE102015116876A1 (de) * 2015-10-05 2017-04-06 Zbk Zentrum Für Baukeramik Gmbh Anlage und Verfahren zum Trocknen keramischer Rohstoffe und Rohlinge
CN106903987A (zh) * 2017-03-13 2017-06-30 广州黑马科技有限公司 凹版印刷机空气循环系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3131471A1 (de) * 1981-03-20 1982-09-30 Roderich Wilhelm Dr.-Ing. 6100 Darmstadt Gräff Vorrichtung zum trocknen feuchter abluft aus einem oder mehreren schuettgut-trocknungsbehaeltern
GB2122384A (en) * 1982-06-14 1984-01-11 Conair Plastics material drying cycle
DE4037443A1 (de) * 1990-11-24 1992-05-27 Mann & Hummel Filter Vorrichtung zum trocknen von schuettgut
DE4234696C2 (de) * 1991-10-14 1994-06-09 Werner Koch Vorrichtung zum Trocknen von Kunststoffschüttgut
DE4321895A1 (de) * 1993-07-01 1995-01-12 Holger Achelpohl Verfahren und Vorrichtung zum Trocknen von Schüttgut, vorzugsweise von Kunststoffgranulat
DE4321863C2 (de) * 1993-07-01 2000-01-05 Behr Gmbh & Co Verfahren und Vorrichtung zur Desorption eines Feuchtigkeit adsorbierenden Materials
DE29621313U1 (de) * 1996-12-07 1997-01-30 digicolor GmbH, 33609 Bielefeld Vorrichtung zum Trocknen von Granulat

Also Published As

Publication number Publication date
EP1067348A1 (fr) 2001-01-10
BR0002304A (pt) 2001-03-13
CA2312511A1 (fr) 2001-01-07
ATE247812T1 (de) 2003-09-15
ES2204403T3 (es) 2004-05-01
MXPA00006721A (es) 2005-04-01
DE19931357C1 (de) 2001-04-05
DE50003340D1 (de) 2003-09-25

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