EP0312888A2 - Installation de séchage pour des panneaux de construction - Google Patents

Installation de séchage pour des panneaux de construction Download PDF

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Publication number
EP0312888A2
EP0312888A2 EP88116852A EP88116852A EP0312888A2 EP 0312888 A2 EP0312888 A2 EP 0312888A2 EP 88116852 A EP88116852 A EP 88116852A EP 88116852 A EP88116852 A EP 88116852A EP 0312888 A2 EP0312888 A2 EP 0312888A2
Authority
EP
European Patent Office
Prior art keywords
drying
dryer
frequency
boards
panels
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
EP88116852A
Other languages
German (de)
English (en)
Other versions
EP0312888A3 (en
EP0312888B1 (fr
Inventor
Gerhard Dipl.-Ing. Trötscher
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier 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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP0312888A2 publication Critical patent/EP0312888A2/fr
Publication of EP0312888A3 publication Critical patent/EP0312888A3/de
Application granted granted Critical
Publication of EP0312888B1 publication Critical patent/EP0312888B1/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
    • 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
    • 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
    • F26B15/18—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 endless belts
    • 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
    • F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
    • F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
    • F26B3/343—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects in combination with convection

Definitions

  • the invention relates to a dryer for building boards, in particular for gypsum fiber boards or gypsum chipboard, the boards being placed on a treadmill for drying and the water content contained in the boards being removed by supplying heat.
  • Such dryer systems for building boards are already known as convection dryers.
  • the building boards to be dried are moved one after the other into the convection dryer on a treadmill, where they are blown from above and below with hot air at different temperatures, which gradually leads to the unwanted water content contained in the building boards due to the relatively high air temperatures of around 80 ° C to 240 ° C is withdrawn.
  • HF ovens are also already known to bring about drying by removing water, but this has so far only been used in paper production for pre-drying paper and cardboard products or for complete drying of such products, although disadvantageously very high power densities and correspondingly high operating costs were required.
  • the object of the present invention is to develop a dryer system of the type mentioned at the outset so that even relatively thick, highly water-containing building boards can be dried quickly and relatively cheaply, and that during the drying process, increased qualities of the boards to be dried, in particular building boards, are achieved.
  • the invention has surprising technical advantages.
  • the essence of the invention is that the drying process first of the surface is carried out, in order to avoid damage to the sheets to be dried, the drying process is interrupted at a certain residual moisture content of the material.
  • the residual drying is then carried out from the inside of the material to a desired residual moisture, otherwise disadvantageous, but here desired water components reach the pre-dried surfaces of the building boards and there, particularly in the case of thick gypsum-bound building boards, re-moisten the surface and thus increase the strength of the building boards, because the possibly already interrupted setting process starts again and can continue undisturbed.
  • a dehydrated layer is easily formed on the top and bottom of the building boards, because the drying in the floor dryer removes the hydrated water from the surfaces. This leads to a certain destabilization of the surface layers, which become chalk-shaped due to the lack of moisture, which affects the strength of the building board. Such dehydrated layers had previously had to be accepted when only using convection dryers.
  • the solidification of the surface layers results in an increased strength of the building boards compared to other dryers.
  • the residual moisture of the building boards by intervention in one of the drying stages or is kept constant by changing the throughput speed.
  • the convection dryer will leave a certain residual moisture in the building boards, which will be used in the subsequent drying to further solidify the surfaces of the building boards when they are moistened again.
  • the drying is only carried out to such an extent that even after passing through the high-frequency furnace, a certain small amount of residual moisture remains in the building boards in order to stabilize the boards in this way.
  • An embodiment of the invention provides that the convection dryer is designed as a floor dryer with hot air nozzles arranged at the top and bottom of the drying fields, the drying fields being arranged one behind the other in the direction of falling temperature.
  • a particularly rapid drying of the building boards is advantageously achieved, because the pre-drying can be carried out at an elevated temperature, and advantageously any surface areas of the building boards that have dried off are moistened again during the subsequent drying.
  • the high-frequency generator is advantageously designed as a high-frequency furnace and has an input lock and a first high-frequency zone and furthermore with a connecting element to a second high-frequency zone, an output lock being arranged at the output of the second high-frequency zone.
  • the treadmill is designed as a glass fiber conveyor belt by the high-frequency furnace.
  • the fiberglass tape does not impair the high frequency properties of the high-frequency furnace, so that the energy generated only benefits the building boards that have been driven through in the desired manner.
  • FIG. 1 The essence of the present invention according to FIG. 1 lies in the fact that a combination between a convection dryer 6 and a high-frequency furnace 10 or high-frequency generator is used.
  • a loading table 1 which is adjustable in height and via which the building boards to be dried are entered into the tier dryer 6 in the form of, for example, 4 levels 2 to 5.
  • the convection dryer 6 is accordingly designed as a floor dryer, i.e.
  • the plates are spaced apart on levels 2 to 5 and are blown or charged with hot air at different temperatures from below and above.
  • the number of fields 7 used for the floor dryer 6 depends on the desired and required production output. When drying such building boards, for example, a total of 10 fields 7 are used.
  • a removal station 8 is arranged, to which the dried building boards are placed in stages again, and at the outlet of the removal station 8 there is a removal table 9, each holding a building board from one floor and feeding a high-frequency furnace 10.
  • the high-frequency furnace 10 consists of an entrance lock 11 and has a first high-frequency zone 12 which is connected to a second high-frequency zone 14 via a connecting element 13. At the exit of this High-frequency furnace 10, in turn, an output lock 15 is arranged.
  • the input lock 11 and the output lock 15 serve to ensure that the high-frequency radiation generated in the high-frequency furnace 10 penetrates to the outside, so that a high-frequency-tight closure is achieved.
  • FIG. 2 shows, for example, a drying diagram of a relatively thick building board, which is explained in more detail in FIG. 3.
  • FIG. 3 schematically shows a section through a building board, such as is present in the area of the removal station 8 or the delivery table 9.
  • This plate 17 has a moist core 18, and the core surrounding zones 19 and 20, which have already been accordingly by the Kon vection dryer 6 are pre-dried.
  • the moist core 18 is dried relatively quickly by the high-frequency oven 10, with the previously dried surfaces water and water vapor particles now advantageously diffusing outward in the direction of the arrow 23 and penetrating into the dehyrated layers 21 and 22.
  • these already dried layers 21 and 22 are moistened again and the moistening results in a certain hydration, i.e. thus to re-solidify these layers because hydrate water is added again and the layer is thereby solidified again.
  • the treadmill through the high-frequency furnace is advantageously designed as a blown fiber conveyor belt at the frequency of the high-frequency furnace of approximately 14 MHz.
  • the residual moisture in the building boards is recorded by suitable measuring devices and can be kept constant by various methods, for example by varying the throughput speed or also power regulation of the high-frequency field.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
EP88116852A 1987-10-17 1988-10-11 Installation de séchage pour des panneaux de construction Expired - Lifetime EP0312888B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3735242 1987-10-17
DE19873735242 DE3735242A1 (de) 1987-10-17 1987-10-17 Trockneranlage fuer bauplatten

Publications (3)

Publication Number Publication Date
EP0312888A2 true EP0312888A2 (fr) 1989-04-26
EP0312888A3 EP0312888A3 (en) 1989-06-28
EP0312888B1 EP0312888B1 (fr) 1994-01-19

Family

ID=6338572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88116852A Expired - Lifetime EP0312888B1 (fr) 1987-10-17 1988-10-11 Installation de séchage pour des panneaux de construction

Country Status (5)

Country Link
US (1) US4890394A (fr)
EP (1) EP0312888B1 (fr)
JP (1) JPH01212886A (fr)
DE (2) DE3735242A1 (fr)
FI (1) FI884762A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739999A1 (fr) * 1995-10-17 1997-04-18 Inst Textile De France Porte-matiere permettant d'appliquer un champ electromagnetique haute-frequence sur un empilement de matieres, et enceinte de traitement, notamment sechoir rapide textile haute-frequence equipe d'un tel porte matiere
WO2008019642A1 (fr) * 2006-08-12 2008-02-21 Lindauer Dornier Gesellschaft Mbh Dispositif de transport pour un équipement de traitement à hyperfréquences

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3811157A1 (de) * 1988-03-31 1989-10-19 K & F Voringer Gewoelbe Und Au Verfahren zur herstellung von gipsfasermaterial aufweisenden gekruemmten flaechigen gestaltungselementen
AT403713B (de) * 1990-08-27 1998-05-25 Innotech Betriebstechnikgesell Dämmplatte aus holzwerkstoff und verfahren zu deren herstellung
US5235757A (en) * 1991-08-29 1993-08-17 Abb Flakt, Inc. Method and apparatus for distributing airflow in a paint baking oven convection zone
US5309650A (en) * 1991-08-29 1994-05-10 Abb Flakt, Inc. Method and apparatus for ventilating a paint baking oven
DE29505419U1 (de) * 1995-03-30 1995-07-13 Kollmer Hansjakob Vorrichtung zum Trocknen und Härten von orthopädischen Formteilen aus Gips
DE10038169A1 (de) * 2000-08-04 2002-03-07 November Ag Molekulare Medizin Synthetisches Partikel zur Markierung einer Substanz
FR2822746B1 (fr) * 2001-04-03 2003-06-20 Lafarge Platres Unite de fabrication de plaques de platre
US6689407B2 (en) 2001-06-25 2004-02-10 Goodmark Foods, Inc. Enhanced capacity food processing systems with efficient space utilization
US6793068B2 (en) 2002-02-04 2004-09-21 Conagra Foods, Inc. Food transport routing systems, devices, and guides for food processing systems and related methods
US6713107B2 (en) * 2002-03-01 2004-03-30 Conagra Foods, Inc. Airflow distribution systems for food processors
DE102004056795B4 (de) * 2004-11-24 2006-10-12 Lindauer Dornier Gmbh Mikrowellen-Durchlauftrockner in Mehretagenbauweise für plattenförmige Produkte, insbesondere Faserplatten
US8388926B2 (en) 2006-01-13 2013-03-05 Certainteed Gypsum, Inc. System and method for the production of gypsum using heat recovery
DK1971813T3 (en) * 2006-01-13 2016-09-19 Certainteed Gypsum Inc System og fremgangsmåde til produktion af alfa-type-gips ved anvendelse af varmegenvinding
JP4875543B2 (ja) * 2007-06-11 2012-02-15 西光エンジニアリング株式会社 紙管の乾燥装置及び紙管の乾燥方法
US8453343B2 (en) * 2010-01-12 2013-06-04 Hot Woods, LLC Method of treatment of wooden items
CN103090643A (zh) * 2013-01-14 2013-05-08 四川省食品发酵工业研究设计院 柑橘榨汁皮渣分段干燥方法
ES2702554T3 (es) 2016-04-26 2019-03-01 Metalquimia Sa Planta y método de secado por aire de alimento troceado
CN109269277A (zh) * 2018-09-15 2019-01-25 江西植提庄园健康产业有限公司 一种冰片鼓风干燥器
DE102019002671A1 (de) * 2019-04-11 2020-10-15 Grenzebach Bsh Gmbh Verfahren zum Trocknen plattenförmiger Materialien und Trocknungsvorrichtung
FR3112304B1 (fr) * 2020-07-10 2022-10-14 Exelsius Système pour le traitement d’un objet comprenant un matériau à réticuler.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567983A (en) * 1946-12-19 1951-09-18 Wood Electro Process Company Method of drying lumber
DE833987C (de) * 1950-05-23 1952-05-23 Hermann Haas Jun Dipl Ing Einrichtung zum Trocknen von nassen Faservliesen
US2909850A (en) * 1956-02-23 1959-10-27 Celotex Corp Drying gypsum wallboard
US3277580A (en) * 1963-07-05 1966-10-11 Hammtronics Systems Inc Method and apparatus for drying
DE1729250A1 (de) * 1967-03-17 1971-06-16 Lahden Rautateollisuus Oy Verfahren und Vorrichtung bei Trocknern zum Ausgleichen der Endfeuchtigkeit in Materialien
DE2517298A1 (de) * 1975-03-18 1976-10-07 Patelhold Patentverwertung Verfahren und einrichtung zur behandlung von wasserhaltigen substanzen sowie anwendung des verfahrens zur herstellung von pasteurisiertem trockenschlamm
US4148476A (en) * 1975-05-06 1979-04-10 Ab Svenska Flaktfabriken Conveyor for lamellar material
DE3546129A1 (de) * 1984-12-24 1986-07-17 Energy International, Inc., Bellevue, Wash. Mikrowellen-lebensmitteltrockner

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408434A (en) * 1942-03-02 1946-10-01 Julius W Mann Method and apparatus for drying materials uniformly throughout their mass
US2543618A (en) * 1946-12-19 1951-02-27 Wood Electro Process Company Apparatus for drying wood
US3435535A (en) * 1967-12-04 1969-04-01 Robert C Blair Means and method for controlling the edge-drying of gypsum wallboard
US3548513A (en) * 1968-05-06 1970-12-22 Frederick T Taylor Dryer with ejectors
US3775860A (en) * 1971-06-03 1973-12-04 Mac Millan Bloedel Ltd Method for drying materials with microwave energy
JPS5022342A (fr) * 1973-06-30 1975-03-10
JPS5077957A (fr) * 1973-11-12 1975-06-25
DE2613512A1 (de) * 1976-03-30 1977-10-06 Buettner Schilde Haas Ag Zweistufiges trocknungsverfahren und trocknungsanlage
DE2721965C2 (de) * 1977-05-14 1986-09-11 Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld Verfahren zur Überwachung und Steuerung der Trocknung von Furnierblättern im Durchlaufverfahren
DE2816551C3 (de) * 1978-04-17 1981-11-26 SIEMENS AG AAAAA, 1000 Berlin und 8000 München Trocknungsregelung an einer Papiermaschine
GB2110803B (en) * 1981-10-23 1985-05-01 Balfour And Co Limited Henry Microwave drying of granular materials
JPS58117986A (ja) * 1981-12-29 1983-07-13 段谷産業株式会社 木材の乾燥方法及び装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567983A (en) * 1946-12-19 1951-09-18 Wood Electro Process Company Method of drying lumber
DE833987C (de) * 1950-05-23 1952-05-23 Hermann Haas Jun Dipl Ing Einrichtung zum Trocknen von nassen Faservliesen
US2909850A (en) * 1956-02-23 1959-10-27 Celotex Corp Drying gypsum wallboard
US3277580A (en) * 1963-07-05 1966-10-11 Hammtronics Systems Inc Method and apparatus for drying
DE1729250A1 (de) * 1967-03-17 1971-06-16 Lahden Rautateollisuus Oy Verfahren und Vorrichtung bei Trocknern zum Ausgleichen der Endfeuchtigkeit in Materialien
DE2517298A1 (de) * 1975-03-18 1976-10-07 Patelhold Patentverwertung Verfahren und einrichtung zur behandlung von wasserhaltigen substanzen sowie anwendung des verfahrens zur herstellung von pasteurisiertem trockenschlamm
US4148476A (en) * 1975-05-06 1979-04-10 Ab Svenska Flaktfabriken Conveyor for lamellar material
DE3546129A1 (de) * 1984-12-24 1986-07-17 Energy International, Inc., Bellevue, Wash. Mikrowellen-lebensmitteltrockner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739999A1 (fr) * 1995-10-17 1997-04-18 Inst Textile De France Porte-matiere permettant d'appliquer un champ electromagnetique haute-frequence sur un empilement de matieres, et enceinte de traitement, notamment sechoir rapide textile haute-frequence equipe d'un tel porte matiere
WO2008019642A1 (fr) * 2006-08-12 2008-02-21 Lindauer Dornier Gesellschaft Mbh Dispositif de transport pour un équipement de traitement à hyperfréquences

Also Published As

Publication number Publication date
EP0312888A3 (en) 1989-06-28
FI884762A (fi) 1989-04-18
DE3735242C2 (fr) 1990-12-20
DE3887257D1 (de) 1994-03-03
JPH01212886A (ja) 1989-08-25
DE3735242A1 (de) 1989-04-27
US4890394A (en) 1990-01-02
EP0312888B1 (fr) 1994-01-19
FI884762A0 (fi) 1988-10-14

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