EP0574757A1 - Verfahren und Vorrichtung zum Einrichten von Trocknern oder Öfen - Google Patents

Verfahren und Vorrichtung zum Einrichten von Trocknern oder Öfen Download PDF

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Publication number
EP0574757A1
EP0574757A1 EP93108625A EP93108625A EP0574757A1 EP 0574757 A1 EP0574757 A1 EP 0574757A1 EP 93108625 A EP93108625 A EP 93108625A EP 93108625 A EP93108625 A EP 93108625A EP 0574757 A1 EP0574757 A1 EP 0574757A1
Authority
EP
European Patent Office
Prior art keywords
measured value
data
value recording
control device
recording system
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.)
Withdrawn
Application number
EP93108625A
Other languages
German (de)
English (en)
French (fr)
Inventor
Stephan Brodt
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.)
NOVOKERAM MAX WAGNER GmbH
Original Assignee
NOVOKERAM MAX WAGNER 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 NOVOKERAM MAX WAGNER GmbH filed Critical NOVOKERAM MAX WAGNER GmbH
Publication of EP0574757A1 publication Critical patent/EP0574757A1/de
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/16—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by wheeled trucks
    • 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
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • 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
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • F26B25/225—Controlling the drying process in dependence on liquid content of solid materials or objects by repeated or continuous weighing of the material or a sample thereof

Definitions

  • the invention relates to a method and a device for setting up dryers or ovens for the thermal treatment of dry goods with the features in the preamble of the main method and device claim.
  • Newly commissioned dryers, kilns or similar thermal treatment plants must be set up for the dry material to be treated.
  • a facility is also required when switching to a new type of dry material.
  • the operating parameters are determined empirically. Here, default values obtained from experience are set and tested in a test run with dry goods. After the run, the dry material is examined and, based on the results obtained, the parameter image for a new test run is changed. In this way, you gradually feel your way through to a final setting of the operating parameters. The procedure costs a lot of time on the one hand and on the other hand does not always lead to optimal results. In addition, a stock of dry goods must be sacrificed as rejects for each dry run, which causes considerable set-up costs.
  • the invention solves this issue with the features in the main method and device claim.
  • the invention provides for monitoring the behavior of the dry material within the dryer and during the process and for reporting the data obtained to an external evaluation and control device.
  • the operating parameters of the dryer can be set up optimally, quickly and inexpensively.
  • a measured value recording system is used to determine the behavior of the dry goods, which is carried along with the dry goods.
  • the data acquisition system is self-sufficient and cannot establish a fixed connection to the outside via a cable tractor or the like.
  • a cable presents significant thermal problems at the usual temperatures with itself, which can also manifest itself in the falsification of measured values. This difficulty is eliminated in the measured value recording system according to the invention and in the wireless remote data transmission by radio, infrared or the like.
  • the data acquisition system is thermally insulated. For thermal reasons, it is also advisable to carry out data transmission at intervals. As a result, the internal heating of the measured value recording system by the transmitter is reduced with its mostly unfavorable efficiency. In addition, the interval transmission helps to save the electricity from the battery and thereby extend the operating time or, if necessary, save weight by reducing the capacity.
  • the interval transmission can be triggered and controlled in different ways.
  • the measurement data acquisition preferably runs continuously. At least some of the measured data can also be evaluated in the measured value recording system. In this case, data is transmitted externally or only after a certain preset threshold value has been exceeded or fallen below.
  • the threshold value monitoring reduces the risk of damage or destruction of the dry goods and enables a timely alarm. In this way, personnel do not have to be present at all times when setting up the dryer.
  • the method according to the invention and the associated device are suitable for any types of dryers, ovens or the like other thermal treatment devices.
  • dryers summarized.
  • the dry material to be treated can vary in the same way.
  • the invention is particularly suitable for chamber or tunnel dryers for the thermal treatment of ceramic moldings.
  • the moldings can be dried by direct heating and / or heated and conditioned dry air.
  • a tunnel dryer usually has several mutually isolated drying zones in which different operating parameters prevail. The drying zones are gradually passed through for the dry goods. If several measurement data acquisition systems are used, the operating parameters can be changed at short notice in zones and the results can be read immediately from the subsequent zone loading.
  • a dryer (1) is shown in the form of a tunnel dryer for ceramic moldings.
  • the dryer (1) is subdivided into several mutually partitioned zones (2), in which the dry material (9) is exposed to dry air which is conditioned in different ways according to temperature and humidity.
  • One or more fans (3) and a heater (4) are arranged in each zone (2).
  • the dry material (9) is stored on mobile drying racks (7), which get into the dryer (1) on rails (8) via end locks (5) and can move out again after passing through the zones (2) .
  • a signal transmitter (6) can be arranged on the entrance-side lock (5), which signals the entry of a new drying rack (7). Similar signal transmitters (6) can also be arranged at other relevant locations inside the dryer (1), for example on the zone bulkheads.
  • the dryer (1) shown with its division and internal design can vary as desired. The same applies to the drying racks (7).
  • a chamber dryer in which the dry material is treated in a stationary manner may be mentioned as alternatives. In the tunnel dryer, however, the dry material (9) is treated in one pass.
  • the dryer (1) could also be a kiln, a kiln or the like other heat treatment device.
  • the dry material (9) can also vary as desired. This can also influence the design of the drying racks (7).
  • the ceramic moldings (9) could also be pushed as a continuous strand through a dryer and / or a burner and only then divided into individual moldings.
  • slideways or similar other means of funding are also possible.
  • the dryer (1) When starting up or changing the type of dry material (9), the dryer (1) must be set up with its operating parameters. Different operating parameters are required for the different zones (2). For example, this would be the strength, duration, direction, reversing cycle, temperature and humidity of the air flow in the individual zones (2). To do this, the blowers (3), the heaters (4) and the fresh or wet air supply must be set and controlled accordingly. Further operating parameters would be, for example, the throughput speed or the length of time that the dry goods (9) or the drying racks (7) stayed in the zones (2). The operating parameters depend on the desired drying process in the dry material (9). The dry material (9) should dry as evenly as possible.
  • a measured value acquisition system (10) is arranged on individual or on all drying racks (7), which reports the measured data determined in the process via wireless data transmission to an evaluation and control device located outside the dryer (1).
  • the measurement data can be displayed, saved and logged.
  • the operating parameters in the dryer (1) or the individual zones (2) are changed until the desired drying process is achieved.
  • the measured value recording system (10) is housed in a thermally insulated housing (15) and is preferably arranged in the relatively cool bottom area of the drying rack (7).
  • Measuring sensors (16, 18) are arranged on one or preferably several ceramic moldings (9), which provide relevant physical data on the condition of the dry material.
  • the measuring sensor (16) is designed, for example, as a moist probe which is embedded in a suitable manner in the ceramic molding (9).
  • the transducer (18) is designed as a strain gauge cell, which measures the weight of the molding (9) as a type of pressure sensor and thus conveys information about the water content or the progress of drying.
  • Vibration measurement suitable displacement sensors such as potentiometers, are used.
  • Reference number (17) denotes a temperature sensor which is positioned on the drying rack (7) in the embodiment shown and measures the prevailing ambient temperature.
  • a moist probe can also be provided in the same way.
  • a temperature sensor can also be arranged on or in a ceramic molding (9). Basically, all types of transducers can be used that provide relevant physical data.
  • the transducers (16, 17, 18) are connected to the data acquisition system (10) via suitable lines.
  • they are preferably connected to a computer (14) which is equipped with a microprocessor and has a program memory, a data memory for preset values and an intermediate memory about the data supplied by the measurement sensors (16, 17, 18).
  • the data input lines are preferably connected in parallel, so that the incoming measurement data can be processed simultaneously and in parallel.
  • the measured value recording system (10) has a transmitter (11) for wireless data transmission, which is preferably designed as a radio, but can also be an infrared transmitter or another suitable device.
  • the measured value recording system (10) can also have a receiver (12).
  • the transmitter (11) and the receiver (12) are connected to the computer (14) by data lines.
  • a converter (not shown) is preferably connected to the data connection, which converts the data processed in parallel in the computer converted into serial data and sent to the transmitter (11) or received by the receiver (12). In this way, the number of transmit and receive channels can be kept smaller than the number of measurement data. Depending on the embodiment of the measured value recording system (10), the converter can also be omitted.
  • the measured value recording system (10) has its own on-board power supply (13) from which the consumers are fed. This is preferably a battery or a rechargeable battery.
  • the measured values can be recorded continuously using the sensors (16, 17, 18).
  • the transmitter (11) is only switched on for a short time. The intervals can be determined internally or externally.
  • the measurement data is preferably acquired, processed and transmitted from the measurement value acquisition system (10) to the external evaluation and control device (19) in real time.
  • the evaluation and control device (19) has at least one receiver (20) corresponding to the transmitter (11). It can additionally have a transmitter (21) which communicates with the receiver (12) of the measured value recording system (10).
  • a computer (22) with a microprocessor, suitable data and program memories, display elements etc. is preferably also provided in the evaluation and control device (19).
  • the common evaluation and control device (19) is equipped with suitable coding devices. For example, coding is carried out using a radio key with a bit pattern.
  • the evaluation and control device (19) can use the radio key to specifically address the individual measured value acquisition systems (10).
  • the evaluation and control device (19) can identify the transmitting measured value acquisition systems (10) and assign the received data using the same coding.
  • the measurement data can be recorded and transmitted intermittently in different ways.
  • the measured value recording system (10) is switched on remotely from the outside by the evaluation and control device (19). It records the data from the transducers (16, 17, 18) and sends them via the transmitter (11) to the evaluation and control device (19).
  • the intervals can be specified by an operator or a program in the evaluation and control device (19).
  • the transmission intervals can also be linked to certain operating events in the dryer (1).
  • the entry or the position of a drying rack (19) can be reported to the evaluation and control device (19) via the signal transmitters (6).
  • such a signal transmitter (6) can be designed as a light barrier on the lock wall or a zone bulkhead. With this signal, zone changes can be signaled and, depending on this, the measured value acquisition can be permitted.
  • the intervals or the transmission clock can also be specified by the measured value acquisition system (10).
  • this is possible through an integrated timer, with which fixed intervals are preferably set.
  • data are continuously supplied to the measured value acquisition system (10), which are evaluated and prepared before the shipment. They are stored in the buffer at least temporarily and compared with one another. The comparison can be made, for example, by means of a differentiation in order to detect special, in particular sudden changes in the state of the dry material (9). Alternatively, the incoming data can also be compared with stored default values or threshold values. As soon as a special data event occurs, for example the abrupt change in state or a significant overshoot or undershoot of the threshold value, the computer (14) transmits the data to the transmitter (11) for transmission. In this way, data transmission can also take place between the defined intervals in order to make special events noticeable in real time and, if necessary, to trigger an alarm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
EP93108625A 1992-06-13 1993-05-28 Verfahren und Vorrichtung zum Einrichten von Trocknern oder Öfen Withdrawn EP0574757A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4219465 1992-06-13
DE19924219465 DE4219465C1 (enrdf_load_stackoverflow) 1992-06-13 1992-06-13

Publications (1)

Publication Number Publication Date
EP0574757A1 true EP0574757A1 (de) 1993-12-22

Family

ID=6460997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108625A Withdrawn EP0574757A1 (de) 1992-06-13 1993-05-28 Verfahren und Vorrichtung zum Einrichten von Trocknern oder Öfen

Country Status (2)

Country Link
EP (1) EP0574757A1 (enrdf_load_stackoverflow)
DE (1) DE4219465C1 (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167907A1 (en) * 2000-06-23 2002-01-02 Piccinini Impianti S.r.l. Plant for the continuous drying of brick products
WO2002076330A1 (de) * 2001-03-21 2002-10-03 Dentsply Detrey Gmbh Verfahren und vorrichtung zum drahtlosen übertragen von dentalprozessdaten
EP1736113A1 (en) * 2005-06-03 2006-12-27 3M Innovative Properties Company Dental material processing device, information device, communication method, and system
DE102007053071A1 (de) * 2007-11-07 2009-05-14 Ivoclar Vivadent Ag Brennofen

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9322346D0 (en) * 1993-10-29 1993-12-15 British Ceramic Service Co Kiln control
DE19525379A1 (de) * 1995-07-12 1997-01-16 Heimsoth Keramische Oefen Und Vorrichtung zur Datenerfassung für einen Wärmebehandlungsvorgang
DE102006019641B4 (de) * 2005-04-28 2013-08-01 Martin Christ Gefriertrocknungsanlagen Gmbh Gefriertrocknungsanlage
DE102006017457A1 (de) * 2006-04-13 2007-10-18 Werner & Pfleiderer Lebensmitteltechnik Gmbh Vakuumiervorrichtung, Verfahren zum Kalibrieren einer Saugleistung einer Unterdruckquelle im Rahmen eines Vakuumiervorgangs für einen bestimmten Typ von Backgut unter Verwendung einer derartigen Vakuumiervorrichtung sowie Vakuumiervorrichtung mit einem Vakuumierprogramm, welches auf eine durch ein derartiges Kalibrierverfahren gewonnene Kalibriertabelle zugreift
EP1959218A1 (en) * 2007-02-15 2008-08-20 IMAS S.P.A. Industria Meccanica Process for controlling, checking and adjusting instantaneous values of ceramic products submitted to drying
DE102007016358A1 (de) * 2007-04-03 2008-10-09 Novokeram Gmbh Einrichtung und Verfahren zum Trocknen keramischer Teile
DE202007015025U1 (de) 2007-04-03 2008-08-14 Novokeram Gmbh Einrichtung zum Trocknen von Formteilen
FR2918176B1 (fr) * 2007-06-28 2010-09-10 Peugeot Citroen Automobiles Sa Procede de mesure du profil de temperature d'un objet realise en tole metallique et couvert d'un revetement pendant son passage dans une etuve de cuisson de ce revetement.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2524283A1 (de) * 1975-05-31 1976-12-09 Bollmann L Kg Verfahren und vorrichtung zur holzfeuchtemessung und holztrocknung
US4386471A (en) * 1980-04-08 1983-06-07 Unisearch Limited In-store drying control method and sytem
DE3343800A1 (de) * 1983-12-03 1985-09-19 ALPAS Peter Schuldt KG, 2800 Bremen Verfahren und vorrichtung zur steuerung des trocknungsverlaufs von nahrungsmitteln, insbesondere rohwurst
EP0347632A1 (de) * 1988-06-20 1989-12-27 Regeltron Computer Gmbh Gerät zur bedienungsfreien Erfassung und Speicherung von Messwerten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2308887C3 (de) * 1973-02-23 1985-08-08 Atmos Fritzsching & Co Gmbh, Zweigniederlassung Lenzkirch Im Schwarzwald, 7825 Lenzkirch Temperaturmeßverfahren und -einrichtung mit Speicherung der Meßwerte in einem temperaturisolierten Gefäß
DE3545215C1 (de) * 1985-12-20 1986-11-06 Didier-Werke Ag, 6200 Wiesbaden Messwerterfassungseinrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2524283A1 (de) * 1975-05-31 1976-12-09 Bollmann L Kg Verfahren und vorrichtung zur holzfeuchtemessung und holztrocknung
US4386471A (en) * 1980-04-08 1983-06-07 Unisearch Limited In-store drying control method and sytem
DE3343800A1 (de) * 1983-12-03 1985-09-19 ALPAS Peter Schuldt KG, 2800 Bremen Verfahren und vorrichtung zur steuerung des trocknungsverlaufs von nahrungsmitteln, insbesondere rohwurst
EP0347632A1 (de) * 1988-06-20 1989-12-27 Regeltron Computer Gmbh Gerät zur bedienungsfreien Erfassung und Speicherung von Messwerten

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167907A1 (en) * 2000-06-23 2002-01-02 Piccinini Impianti S.r.l. Plant for the continuous drying of brick products
WO2002076330A1 (de) * 2001-03-21 2002-10-03 Dentsply Detrey Gmbh Verfahren und vorrichtung zum drahtlosen übertragen von dentalprozessdaten
EP1736113A1 (en) * 2005-06-03 2006-12-27 3M Innovative Properties Company Dental material processing device, information device, communication method, and system
DE102007053071A1 (de) * 2007-11-07 2009-05-14 Ivoclar Vivadent Ag Brennofen

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Publication number Publication date
DE4219465C1 (enrdf_load_stackoverflow) 1993-07-22

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