EP1258693B1 - Procédé et dispositif pour le séchage de bois de sciage - Google Patents

Procédé et dispositif pour le séchage de bois de sciage Download PDF

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Publication number
EP1258693B1
EP1258693B1 EP02010640A EP02010640A EP1258693B1 EP 1258693 B1 EP1258693 B1 EP 1258693B1 EP 02010640 A EP02010640 A EP 02010640A EP 02010640 A EP02010640 A EP 02010640A EP 1258693 B1 EP1258693 B1 EP 1258693B1
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EP
European Patent Office
Prior art keywords
stack
drying
fans
sealing device
drying chamber
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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
EP02010640A
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German (de)
English (en)
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EP1258693A1 (fr
Inventor
Reinhard Dipl.-Ing. Brunner
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    • 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
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/063—Movable containers or receptacles, e.g. carts, trolleys, pallet-boxes
    • 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
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
    • F26B21/028—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by air valves, movable baffles or nozzle arrangements

Definitions

  • the invention relates to a method and an apparatus for drying stacked lumber or similar material according to the preamble of claim 1 and claim 2.
  • a generic drying device is from the DE 198 01 162 known, which refers to vacuum drying.
  • the CA 2 199 776 shows a corresponding drying device with a drying chamber through which a stacked wood carrying track car to be dried can be moved. Above the stack of wood on the track car at a distance therefrom, fans are arranged in the drying chamber, the axis of rotation of which is oriented in the direction of loading and from which the desiccant flow exits into the charging direction, laterally deflected, downwards and substantially horizontally across the stacked one Wood passes. To prevent its air flow between wood stack and fan assembly are stationary there Sealing plates provided which rub on the top of the wood stack and thus subject to wear.
  • the US 2,834,120 discloses a drying method and a drying apparatus with a drying chamber into which a railroad car carrying two wood stacks can be moved in and out on the same side.
  • a drying chamber into which a railroad car carrying two wood stacks can be moved in and out on the same side.
  • two fans with an orientation parallel to the retraction direction are arranged laterally. From this emerging air is guided in a central region of the drying chamber and deflected there again by deflecting plates in the axial direction.
  • the track car has at its end faces in one embodiment in each case triangular plates, which are connected on their upper side by a narrow cover.
  • the inverted after retraction of the entry opening triangular plate has an opening which faces the central air supply ducts.
  • the entering through the opening of an end plate of the track car air flows substantially in the longitudinal direction of the channel formed by the two side woodpile and, since the entry opening facing end face is closed by the local plate, by deflection laterally through the woodpile.
  • the dry material In the case of longitudinally loaded drying chambers, the dry material is generally moved in and out on track cars through a gate on the front side. Other means of transport (eg carriages, carriages on wheels or pneumatic tires) may also be suitable for longitudinal loading.
  • the dry material in particular lumber, is pre-stacked outside the drying chamber in the form of stacking packages and placed on the track wagons for loading, eg with the aid of a forklift. Underlayed squared timbers serve as the basis for each stack package to make room for the entry and exit of the Keep forks free.
  • squared lumber oriented across the board length, eg corresponding aluminum hollow sections are used.
  • the individual board layers of each stack package are separated by stacking strips to allow passage of the desiccant across the boards in the chamber.
  • the usual dimensions of a package are 1 to 2 m in width and 1 to 1.5 m in height; the length is given by the boards.
  • the desiccant acts as a carrier of the thermal energy needed to vaporize the moisture contained in the dry matter.
  • the desiccant is heated on a heater and outputs the amount of heat absorbed at stacking passage to the wood.
  • the required flow is generated by fans.
  • the fans are to be mounted above a false ceiling or, better, in a vertical plane adjacent to a stacking row or between two rows. The exact arrangement depends on the requirements of the chamber and flow geometry. In practice, the arrangement has been proven in a horizontal row; If there is an increased need for delivery capacity, several fan rows can be arranged one above the other.
  • the conveyed gas penetrates a stacking area homogeneously, is deflected at a side wall of the chamber, flows through other stacking areas back to the opposite wall and returns to the first stacking area.
  • the separation of the opposing flow is given by the channels, which are bounded vertically by board layers, horizontally by stacking strips or squared lumber.
  • the desiccant flow but also other ways with unwanted “short circuits". If e.g. the boards can not be placed close to each other or placed (in "unedged goods", which are boards with bark and / or bevelled edges), a part of the desiccant can already reverse within the stack without reaching the wall.
  • the entire fan row with an additional, common nozzle.
  • This is formed, for example, from sheets which extend from the fan level to the adjacent stack row (s). At the ends of these nozzle plates soft sealing strips are useful, which compensate for the unevenness of the board edges when pressed against the stack and so ensure a good seal between areas of opposite flow.
  • the invention has the specific object to realize necessary seals and covers to avoid unwanted ways, short circuits and inhomogeneities of the desiccant flow in a simple, inexpensive and practical way.
  • the invention provides in a generic method, the characterizing features of claim 1 and in a generic device, the characterizing features of claim 2 before.
  • the required between the ends of the fan plane outgoing nozzle plates and the stack sides seals can be used without the risk of damage when pressed outside the drying chamber at the appropriate height to the sides of the resting on track cars stack row and properly fixed.
  • the sides of the gaskets facing away from the stack then slide along the straight and smooth ends of the nozzle plates or keep them at a small distance during feeding.
  • the installation and removal of the seals is easily possible because the loaded rail cars outside the chamber are freely accessible from all sides.
  • the seals can be easily attached directly to the wood pile; the required dimensional accuracy during loading can hardly be achieved this way. It is better, To use a sealing device that can be positioned accurately relative to the track car.
  • This sealing device preferably has a frame which is composed of horizontal supports and vertical connections, wherein the elements are screwed together, glued or welded depending on the material.
  • a material aluminum is particularly good, because it is lightweight, corrosion-resistant and easy to work. Therefore, aluminum tubes are preferably used as vertical connections, aluminum profiles as horizontal holders. These profiles contain a stack side in the longitudinal direction of a recess into which a sealing strip of elastic material is pressed and held there either by barbs or gluing.
  • the frame usually has the length and height of a stack row; if it is too long, it can also be made of parts so that it can be easily moved by the operator even without machine assistance.
  • the frame is designed chamber-specific, because the horizontal brackets must correspond in height with the fixedly mounted in the drying chamber nozzle plates.
  • Stanchions are preferably used to attach the rack to the railcar, e.g. in the form of aluminum hollow tubes.
  • the stanchions are placed on both sides of the stack row in corresponding recesses at the ends of the lowermost, flush with both sides of the deck squared timbers and held together at the top with a simple cross-connection.
  • the squared timbers also called so if made of other materials such as aluminum are held in place on the bed by the weight of the stacking packs resting on them.
  • the frame is suitably secured from the side to the stanchions, e.g. hung on hooks or angle plates.
  • the sealing strips press against the stack side and thus separate stack areas above and below with respect to the desiccant flow from each other. So that the stanchions do not form an obstacle to continuous sealing strips when pressed against the stack, a correspondingly yielding material is used for the sealing strips, into which the stanchions can be completely pressed.
  • Stakes as fasteners for the sealing device have an additional advantage: Since they fit snugly on both sides of the stacking row, they prevent boards from shearing laterally during drying. This is particularly important for vacuum dryers because the width of the gates is very tight for reasons of statics.
  • Covers or panels for the critical areas between the stack packages can be easily integrated into the frame of the sealing device.
  • vertical panels can be easily used to cover the package or board ends and moved horizontally as desired.
  • These panels can be made of sheet metal or plastic plates of different width, depending on current requirements. They can also be broken, if the covering effect should be lower.
  • several narrow apertures can be placed next to each other at a suitable distance. The same purpose is fulfilled by a single aperture with openings whose size or number decreases from the sides to the middle.
  • the longitudinally displaceable vertical panels can reach up to the rear wall and the door of the drying chamber, so that even at the ends of the stack row to rapid drying without additional device is avoided.
  • horizontal panels can be positioned and fixed in a simple manner in stack-side grooves of the vertical connections of the frame described, for example by means of spring clips.
  • Fig. 1 shows a drying chamber 1 with fan 2 and symmetrical nozzle plates 3.
  • fan 2 When using multiple fans these are in the longitudinal direction of the drying chamber, so perpendicular to the paper plane, lined up at the same height in a row to think; the nozzle plates extend correspondingly over the length of the chamber.
  • On each side of the fans 2 rests ever a railcar 5 with wheels 6 on tracks 4, which are laid on the ground.
  • the track cars each carry three stacking packages 7 one above the other, which each form a stack row with further (not visible) packages in the longitudinal direction of the drying chamber.
  • Each stack of piles 7 contains several layers of parallel boards 8, separated by stacking strips 9 between two layers, and rests on squared timbers 10.
  • the frame 13 laterally of the stanchions 11 is shown enlarged in Fig. 2. It is composed of vertical connections 15 and horizontal brackets 14 and suspended from mounting brackets 16.
  • the horizontal brackets 14 at the level of the interfaces 18 are provided with sealing strips 17, the ends of which are in contact with the stack.
  • Vertical panels 19 are guided in opposite grooves of the horizontal brackets 14.
  • a vertically displaceable horizontal panel 20 (indicated by a double arrow) is located at the height of the square timber 10.
  • FIG. 3 an arrangement of three vertical aperture 19 is shown side by side.
  • the circular cutout provides a view of the underlying ends of two adjacent stacking packs 7.
  • the stack-side groove 21 of a vertical connection 15 is made visible.
  • the horizontal aperture 20 is guided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Claims (9)

  1. Procédé pour sécher du bois coupé empilé ou un matériau similaire dans une chambre de séchage à chargement longitudinal au moyen d'un chariot sur rails équipée d'un chauffage par convection, de ventilateurs faisant circuler le dessiccateur gazeux transversalement au sens du chargement et d'un dispositif d'étanchéité fixé au chariot sur rails pour séparer le flux à contre-courant du dessiccateur des zones d'empilage, caractérisé en ce que le dispositif d'étanchéité est fixé en dehors de la chambre de séchage (1) sous forme d'un bâti par au moins deux attaches horizontales (14), dans chacune desquelles est enfoncé un listel d'étanchéité (17) en matériau élastique, et par des raccords verticaux à un chariot sur rails (5) chargé de piles (7) et en ce que le dispositif d'étanchéité rentre dans la chambre de séchage avec le chariot.
  2. Dispositif pour sécher du bois coupé empilé ou un matériau similaire pour application du procédé selon la revendication 1, avec un chariot sur rails (5) chargé de piles (7) avec un dispositif d'étanchéité qui lui est fixé, caractérisé en ce que le dispositif d'étanchéité présente un bâti placé sur le chariot (5), ledit bâti étant formé par au moins deux attaches horizontales (14) et raccords verticaux (15), un listel d'étanchéité (17) en matériau élastique étant enfoncé dans chacune de ces attaches horizontales (14).
  3. Dispositif selon la revendication 2, caractérisé en ce que le dispositif d'étanchéité (13) est placé sur des ranchers (11), lesquels ranchers retiennent latéralement les piles (7) et sont reliés au chariot sur rails (5) de manière adéquate, les listels d'étanchéité (17) se trouvant en contact avec la file de piles.
  4. Dispositif selon la revendication 2 ou 3, caractérisé en ce que les attaches horizontales (14) possèdent des rainures continues sur leurs faces supérieure et inférieure, lesdites rainures servant de support pour les panneaux verticaux (19) coulissant horizontalement.
  5. Dispositif selon l'une des revendications 2 à 4, caractérisé en ce que les raccords verticaux (15) présentent une rainure (21) du côté faisant face à la pile, ladite rainure servant de guide et de fixation aux panneaux horizontaux (20) coulissant verticalement.
  6. Dispositif selon une des revendications 2 à 5, caractérisé en ce que le dispositif d'étanchéité pénètre avec le chariot sur rails (5) dans une chambre de séchage (1) dans laquelle des ventilateurs (2) sont placés en file l'un derrière l'autre dans le sens longitudinal.
  7. Dispositif selon la revendication 6, caractérisé en ce que le courant de dessiccation sort des ventilateurs (2) transversalement au sens du chargement.
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que les ventilateurs sont placés entre les piles (7).
  9. Dispositif selon une des revendications 6 à 8, caractérisé par des tôles de tuyères symétriques (3) aux ventilateurs (2).
EP02010640A 2001-05-14 2002-05-11 Procédé et dispositif pour le séchage de bois de sciage Expired - Lifetime EP1258693B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10124555 2001-05-14
DE10124555A DE10124555C1 (de) 2001-05-14 2001-05-14 Verfahren und Vorrichtung zum Trocknen von Schnittholz

Publications (2)

Publication Number Publication Date
EP1258693A1 EP1258693A1 (fr) 2002-11-20
EP1258693B1 true EP1258693B1 (fr) 2007-07-11

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EP02010640A Expired - Lifetime EP1258693B1 (fr) 2001-05-14 2002-05-11 Procédé et dispositif pour le séchage de bois de sciage

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EP (1) EP1258693B1 (fr)
AT (1) ATE366902T1 (fr)
DE (2) DE10124555C1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015110750B4 (de) * 2014-07-07 2021-12-09 Hildebrand Holztechnik Gmbh Trocknungsvorrichtung
EP3190370A1 (fr) * 2016-01-05 2017-07-12 Hildebrand Holztechnik GmbH Dispositif de séchage
CN113231280A (zh) * 2021-03-31 2021-08-10 重庆展成家俱制造有限公司 一种家具板材的涂胶烘烤装置
DE102022130433B4 (de) 2022-05-09 2024-09-05 Reinhard Brunner Kanal-Trocknungsvorrichtung

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1571226A (en) * 1920-01-19 1926-02-02 Barducci Pilade Drying plant
US2055834A (en) * 1931-06-01 1936-09-29 Moore Dry Kiln Company Dry kiln
US2050226A (en) * 1932-02-15 1936-08-04 Nat Dry Kiln Company Apparatus for drying lumber
US2050597A (en) * 1934-02-07 1936-08-11 James M Thorp Dehydrator
FR993971A (fr) * 1944-11-29 1951-11-09 Perfectionnements aux séchoirs à chariots
GB738345A (en) * 1953-06-25 1955-10-12 G F Wells Ltd Improvements in and relating to drying kilns
US2834120A (en) * 1954-05-24 1958-05-13 Greenhood Elisha Russell Lumber curing process
GB849075A (en) * 1959-01-29 1960-09-21 Vanicek Viktor Improvements in or relating to drying chambers, particularly for wood
GB1331229A (en) * 1969-12-10 1973-09-26 Wells Ltd G F Drying kilns
DE3941134A1 (de) * 1989-12-13 1991-06-20 Wagner Max Novokeram Verfahren und vorrichtung zum trocknen von guetern, insbesondere keramischen formlingen
DE4228698C2 (de) * 1991-12-02 1994-07-07 Neumann Rodolfo J Vorrichtung und Verfahren zur Kondensationstrocknung
DE19801162C1 (de) * 1998-01-15 1999-09-23 Reinhard Brunner Vorrichtung zum Trocknen von gestapeltem Schnittholz

Also Published As

Publication number Publication date
DE10124555C1 (de) 2002-11-07
EP1258693A1 (fr) 2002-11-20
DE50210436D1 (de) 2007-08-23
ATE366902T1 (de) 2007-08-15

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