EP1067348A1 - Procédé et dispositif de séchage de granulat - Google Patents

Procédé et dispositif de séchage de granulat Download PDF

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Publication number
EP1067348A1
EP1067348A1 EP00112648A EP00112648A EP1067348A1 EP 1067348 A1 EP1067348 A1 EP 1067348A1 EP 00112648 A EP00112648 A EP 00112648A EP 00112648 A EP00112648 A EP 00112648A EP 1067348 A1 EP1067348 A1 EP 1067348A1
Authority
EP
European Patent Office
Prior art keywords
drying
drying air
individual
heating device
heating
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.)
Granted
Application number
EP00112648A
Other languages
German (de)
English (en)
Other versions
EP1067348B1 (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
Original Assignee
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 and is heated when flowing through a heating device, wherein the drying air flow supplied to the individual drying container depending on the current situation reflecting in the drying container concerned Temperature is more or less throttled.
  • Such a method is known from DE 31 31 471 C2.
  • a throttle valve in front of the 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. At the exit of the drying air dryer is the drying air through the only heater directed before entering the flow line to the drying containers.
  • the known device generally works satisfactorily, has the disadvantage, however, that all drying containers with Drying air at the same temperature must be fed. This proves to be inappropriate if in the individual Drying containers can be dried different materials should, because of different temperature sensitivity different temperatures should be dried. Moreover are comparatively long in the known device Lines between the heating device and the drying containers insulate to avoid excessive heat loss.
  • 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.
  • each a drying container supplied drying air flow with a single heating device is heated and that the drying air flows are not only depending on the temperature but also depending on the respective Heating output of the individual heating device in question be controlled such that when a predetermined one is reached Heating output of the individual heating device, the drying air flow in question is throttled so that its heating to a preselected target temperature regardless of the Distribution of drying air volume 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 different 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, over-dimensioned 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 can be switched on and off automatically expediently 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, a drying air dryer and one Heating device, which in a drying circuit having a blower for drying air are built into the one supply line and a return line and connecting it Branch lines for the parallel arrangement of the drying containers has, in each branch line inlet to the drying container a throttle valve is installed and each drying container a temperature sensor is assigned, which via a signal line with a control unit for adjusting the Throttle valve is connected.
  • Such a device is also from DE 31 31 471 C2 known. You are liable in a corresponding manner for the aforementioned Disadvantages.
  • the known device improved according to the invention in that in each inlet branch line a single heater for a drying container is arranged and that each individual heater over a heating power signal line with the control unit for the throttle valve associated with the same drying container is.
  • each Throttle valve in the individual heating device behind each Throttle valve arranged. This allows the individual heating device Arrange what near the associated drying container the heat losses are reduced or the effort for insulation measures belittles. At the same time, the throttle valve is less heat loaded.
  • 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 in 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 in a known manner too 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 controlled 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 above, a signal line 22d, 32d the container temperature 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 this 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 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 respectively 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)
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 true EP1067348A1 (fr) 2001-01-10
EP1067348B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1914496A2 (fr) * 2006-10-16 2008-04-23 LANCO GmbH Dispositif de séchage de produits en vrac ainsi que procédé de séchage de produits en vrac en utilisant un tel dispositif
EP2020581A1 (fr) * 2007-08-03 2009-02-04 Moretto S.P.A. Installation et procédé pour la déshumidification contrôlée de matière granulaire

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061161A2 (fr) * 1981-03-20 1982-09-29 Roderich Wilhelm Dr.-Ing. Gräff Dispositif pour sécher l'air d'échappement humide d'un ou de plusieurs récipients de séchage de marchandises en vrac
GB2122384A (en) * 1982-06-14 1984-01-11 Conair Plastics material drying cycle
US5182871A (en) * 1990-11-24 1993-02-02 Filterwerk Mann & Hummel Gmbh Apparatus for drying bulk materials
DE4234696A1 (de) * 1991-10-14 1993-05-06 Koch, Werner, 7536 Ispringen, De Vorrichtung zum trocknen von kunststoffschuettgut
DE4321895A1 (de) * 1993-07-01 1995-01-12 Holger Achelpohl Verfahren und Vorrichtung zum Trocknen von Schüttgut, vorzugsweise von Kunststoffgranulat
DE29621313U1 (de) * 1996-12-07 1997-01-30 digicolor GmbH, 33609 Bielefeld Vorrichtung zum Trocknen von Granulat

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4321863C2 (de) * 1993-07-01 2000-01-05 Behr Gmbh & Co Verfahren und Vorrichtung zur Desorption eines Feuchtigkeit adsorbierenden Materials

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061161A2 (fr) * 1981-03-20 1982-09-29 Roderich Wilhelm Dr.-Ing. Gräff Dispositif pour sécher l'air d'échappement humide d'un ou de plusieurs récipients de séchage de marchandises en vrac
DE3131471C2 (fr) 1981-03-20 1990-06-21 Roderich Wilhelm Dr.-Ing. 6100 Darmstadt De Graeff
GB2122384A (en) * 1982-06-14 1984-01-11 Conair Plastics material drying cycle
US5182871A (en) * 1990-11-24 1993-02-02 Filterwerk Mann & Hummel Gmbh Apparatus for drying bulk materials
DE4234696A1 (de) * 1991-10-14 1993-05-06 Koch, Werner, 7536 Ispringen, De Vorrichtung zum trocknen von kunststoffschuettgut
DE4321895A1 (de) * 1993-07-01 1995-01-12 Holger Achelpohl Verfahren und Vorrichtung zum Trocknen von Schüttgut, vorzugsweise von Kunststoffgranulat
DE29621313U1 (de) * 1996-12-07 1997-01-30 digicolor GmbH, 33609 Bielefeld Vorrichtung zum Trocknen von Granulat

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1914496A2 (fr) * 2006-10-16 2008-04-23 LANCO GmbH Dispositif de séchage de produits en vrac ainsi que procédé de séchage de produits en vrac en utilisant un tel dispositif
EP1914496A3 (fr) * 2006-10-16 2009-12-16 LANCO GmbH Dispositif de séchage de produits en vrac ainsi que procédé de séchage de produits en vrac en utilisant un tel dispositif
EP2020581A1 (fr) * 2007-08-03 2009-02-04 Moretto S.P.A. Installation et procédé pour la déshumidification contrôlée de matière granulaire

Also Published As

Publication number Publication date
DE19931357C1 (de) 2001-04-05
EP1067348B1 (fr) 2003-08-20
DE50003340D1 (de) 2003-09-25
CA2312511A1 (fr) 2001-01-07
ATE247812T1 (de) 2003-09-15
ES2204403T3 (es) 2004-05-01
MXPA00006721A (es) 2005-04-01
BR0002304A (pt) 2001-03-13

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