WO2002065039A1 - Dispositif de sechage sous vide dielectrique et de coloration de bois de feuillus - Google Patents

Dispositif de sechage sous vide dielectrique et de coloration de bois de feuillus Download PDF

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Publication number
WO2002065039A1
WO2002065039A1 PCT/SK2001/000024 SK0100024W WO02065039A1 WO 2002065039 A1 WO2002065039 A1 WO 2002065039A1 SK 0100024 W SK0100024 W SK 0100024W WO 02065039 A1 WO02065039 A1 WO 02065039A1
Authority
WO
WIPO (PCT)
Prior art keywords
drying
colour
pressure vessel
tingeing
wood material
Prior art date
Application number
PCT/SK2001/000024
Other languages
English (en)
Inventor
Kvetoslav Nikl
¿tefan OLEJNÍK
Ivan HRICÍK
Original Assignee
Kvetoslav Nikl
Olejnik Ntefan
Hricik Ivan
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 Kvetoslav Nikl, Olejnik Ntefan, Hricik Ivan filed Critical Kvetoslav Nikl
Publication of WO2002065039A1 publication Critical patent/WO2002065039A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/16—Wood, e.g. lumber, timber

Definitions

  • the invention relates to the device intended for dielectric-vacuum drying and colour tingeing of hard wood. It is a progressive combination of vacuum-dielectric drying devices and steaming chambers, usually used for colour tingeing.
  • vacuum-based drying devices do not allow and enable homogenous material heating for which in the course of drying process there occur mechanical deformations of the material dried.
  • duration of drying-process itself during which a required output material dampness level is to be attained rises and extends inadequately in terms of time.
  • dielectric-based drying device is in principle limited in such a sense that it does not allow exhausting an immense content and volume of dampness liberated from the material. This is only possible with a certain negative pressure, which must be generated for this purpose, however, this is a technical feature of vacuum drying devices.
  • Steaming devices are self-contained, closed pressure devices (vessels) in which the quality and properties of wood material are improved, mainly its elasticity and colour tinge, with the time during which the material is exposed to specific pressure effects.
  • this process currently applied is not efficient and enormously cost- intensive.
  • it is a prerequisite to build large steaming silos (pits) and, in principle, automatic control of wood material tingeing process is not possible.
  • a required colour tinge can not be achieved with accuracy below 20 per cent.
  • the said objective and result can be achieved on the basis of the dielectric- vacuum device for drying and colour-tingeing of deciduous and hard wood materials, in accordance with the invention (of the device/dryer), consisting of a cylindrical pressure vessel into which the material to be dried is transported, inner drying space connected with the vacuum pump by means of which a negative pressure is generated, the condensing unit that changes the water vapours to a liquid state, equipped (the condensing unit) with a circulating pump and the liquid-cooling unit.
  • the condensing unit, circulating pump and cooling unit are located at the opposite end of pressure vessel.
  • Emitters with high-frequency electromagnetic energy sources are mounted at the outer surface of the vessel, behind the shielded openings through which the radiation is distributed, installed at the opposite sides of the vessel.
  • Inner drying space of the pressure vessel is connected with the liquid-pumping unit and all the said elements are linked with the process-control console.
  • the condensing unit contains a cooling medium.
  • the device In order to efficiently improve and attain higher contrast of a steaming-induced colour tinge the device has been equipped with compressor generating the positive pressure (overpressure), as well as spraying nozzles connected with hot-steam generator, which elements are linked with the process-control console too.
  • the vessel With a view to attain negative and positive, respectively pressures the vessel is equipped with a hermetic vacuum locking cover.
  • An integral part of the device is a material transport rail assembly (preferably wheeled material-supporting transport platform) by means of which the material is easily transported in and out.
  • drying parameters and colour modifications of dried wood material are remarkably improved, mainly the drying-process quality
  • High-frequency electromagnetic energy necessary to achieve a homogenous heating-up of wood material is distributed into the cylindrical pressure vessel in which the wood material dried is placed, by means of special directional emitters, directly into the entire mass of the material dried and in parallel with the effects of negative pressure, thus causing an intensive liberation of dampness from wood material dried and its (dampness) absorption in the inner environment of the device's drying space in which it is changed, through the heat shock, to a condensate that is then exhausted out of the drying space.
  • the device based on the said invention (figs. 3 and 4) consisted of pressure vessel 1 in the form of pressure, thermally insulated steel cylinder of 1800 mm in diameter, in lower part of which there was a wheeled material-supporting transport platform 5 on which wood material 8 dried was placed.
  • the pressure vessel 1 was equipped with the hermetic vacuum locking cover 13.
  • At the front side there was located the inner drying space connected with the vacuum pumping unit 4.
  • At both sides of the inner drying space (approximately in the middle of the same) there were located 8 shielded openings (at each side of the cylinder's shell) behind which the high frequency electromagnetic energy emitters 3 were mounted.
  • condensing unit 7 consisting of a condenser with cooling medium, connected with the circulating pump V_ and cooling unit 12. Behind the condenser there was installed the water pump 14 for the purpose of pumping out the liquid, which water pump was connected to the inner drying space of the pressure vessel 1_. All the elements of the device were linked with a central processor unit by means of which the entire process of wood material drying and colour tingeing was controlled.
  • This device had been used both for wood material's drying and, the material's drying and colour tingeing of the same, as it is described herebelow.
  • Wood material to be dried was placed on the wheeled material-supporting transport platform and inserted in this way into the inner drying space (steel cylinder) which was then hermetically closed and locked.
  • the very drying process is fully automatic with the understanding that individual data were detected, collected and processed in the entire course of wood material drying process.
  • the moment of drying-process' deactivation was determined with reference to a volume of condensate exhausted, which volume had been (pre-)set (as the figure related to wood material output dampness level) at the drying process start-up and activation.
  • figs. 1 and 2 there is depicted the device based on the invention from figs. 3 and 4 which was equipped with compressor 6 and there were installed spraying nozzles 10 along the entire length of its upper part, connected (the nozzles) to hot-steam generator 9 installed at the back part of the device, outside the device's inner drying space. Also these elements were linked with the central processor unit.
  • the device enhanced in this manner was used for colour tingeing of wood material with the application of steaming method, as mentioned herebelow. It should be mentioned that this device makes it possible to colour-tinge the wood material, which had already been dried-up before.
  • the vacuum pump was deactivated by which act the negative pressure was eliminated and the respective positive pressure (overpressure) was generated through the steam that was brought and blown into the inner drying space of the device. Hot steam was then applied to wood material, placed on the wheeled material-supporting platform, through the spraying nozzles.
  • drying and colour-tingeing device is intended for wood and wooden material-processing business subjects and firms, as well as final wood-product manufacturers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Cette invention concerne un dispositif de séchage sous vide diélectrique et de coloration de bois de feuillus, comprenant un récipient sous pression (1) de section circulaire relié, au niveau d"un côté de l"espace de séchage interne, à une pompe sous vide (4). Les deux côtés du récipient sous pression sous pourvus d"orifices blindés pour les émetteurs (3), disposés derrière les orifices (3.1) et reliés aux sources (2) d"énergie électromagnétique haute fréquence. Ce récipient (1) est relié au groupe compresseur/condensateur (7), lequel est muni d"une pompe de circulation (11) et d"une unité de refroidissement (12), qui se trouvent à l"extrémité opposée du récipient sous pression (1) dont l"espace de séchage interne est situé derrière le groupe compresseur/condensateur (7) relié à la pompe à eau (14), qui pompe le liquide. Tous les éléments susmentionnés sont reliés au pupitre de commande de processus.
PCT/SK2001/000024 2001-02-14 2001-11-27 Dispositif de sechage sous vide dielectrique et de coloration de bois de feuillus WO2002065039A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SK227-2001 2001-02-14
SK2272001A SK2272001A3 (en) 2001-02-14 2001-02-14 A device for dielectric-vacuum drying and colour tingeing of hard wood

Publications (1)

Publication Number Publication Date
WO2002065039A1 true WO2002065039A1 (fr) 2002-08-22

Family

ID=20435774

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SK2001/000024 WO2002065039A1 (fr) 2001-02-14 2001-11-27 Dispositif de sechage sous vide dielectrique et de coloration de bois de feuillus

Country Status (2)

Country Link
SK (1) SK2272001A3 (fr)
WO (1) WO2002065039A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925774A (zh) * 2014-04-16 2014-07-16 中山市东成家具有限公司 能充分发挥红木家具保健功能的干燥方法
CN111121417A (zh) * 2019-12-30 2020-05-08 齐宽宽 一种加热均匀的高效型木材干燥设备

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE374362C (de) * 1919-09-13 1923-07-18 Paul H Mueller Dr Ing Verfahren und Vorrichtung zum Trocknen bei Dampfspannung im Unterdruck fuer Holz usw
DE4228698A1 (de) * 1991-12-02 1993-06-03 Neumann Rodolfo J Vorrichtung und verfahren zur kondensationstrocknung
US5228209A (en) * 1991-03-23 1993-07-20 Reinhard Brunner Apparatus for drying out wood
WO1996001971A1 (fr) * 1994-07-12 1996-01-25 Nauchno-Proizvodstvenny Tsentr Informatsionnykh I Promyshlennykh Tekhnology Rossiyskoi Akademii Nauk Chambre de sechage di-electrique sous vide
EP0887606A1 (fr) * 1997-06-28 1998-12-30 Bernhard Gerl Dispositif de séchage
US5979074A (en) * 1995-06-17 1999-11-09 Brunner; Reinhard Method and device for drying sawn timber at reduced pressure
DE19822355A1 (de) * 1998-05-19 1999-11-25 Pierre Flecher Feinvakuum-Kondensationsholztrockner mit Warmwasser- und Mikrowellenheizung
GB2343502A (en) * 1998-11-03 2000-05-10 Shunichi Yagi Microwave and far infrared drying under reduced pressure
FR2793008A1 (fr) * 1999-04-30 2000-11-03 Valeurs Bois Ind Procede d'extraction de jus naturel de matieres vegetales ligneuses, dispositif permettant la mise en oeuvre du procede et utilisation du procede pour la production de vegetaux ligneux seches

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE374362C (de) * 1919-09-13 1923-07-18 Paul H Mueller Dr Ing Verfahren und Vorrichtung zum Trocknen bei Dampfspannung im Unterdruck fuer Holz usw
US5228209A (en) * 1991-03-23 1993-07-20 Reinhard Brunner Apparatus for drying out wood
DE4228698A1 (de) * 1991-12-02 1993-06-03 Neumann Rodolfo J Vorrichtung und verfahren zur kondensationstrocknung
WO1996001971A1 (fr) * 1994-07-12 1996-01-25 Nauchno-Proizvodstvenny Tsentr Informatsionnykh I Promyshlennykh Tekhnology Rossiyskoi Akademii Nauk Chambre de sechage di-electrique sous vide
US5979074A (en) * 1995-06-17 1999-11-09 Brunner; Reinhard Method and device for drying sawn timber at reduced pressure
EP0887606A1 (fr) * 1997-06-28 1998-12-30 Bernhard Gerl Dispositif de séchage
DE19822355A1 (de) * 1998-05-19 1999-11-25 Pierre Flecher Feinvakuum-Kondensationsholztrockner mit Warmwasser- und Mikrowellenheizung
GB2343502A (en) * 1998-11-03 2000-05-10 Shunichi Yagi Microwave and far infrared drying under reduced pressure
FR2793008A1 (fr) * 1999-04-30 2000-11-03 Valeurs Bois Ind Procede d'extraction de jus naturel de matieres vegetales ligneuses, dispositif permettant la mise en oeuvre du procede et utilisation du procede pour la production de vegetaux ligneux seches

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925774A (zh) * 2014-04-16 2014-07-16 中山市东成家具有限公司 能充分发挥红木家具保健功能的干燥方法
CN111121417A (zh) * 2019-12-30 2020-05-08 齐宽宽 一种加热均匀的高效型木材干燥设备

Also Published As

Publication number Publication date
SK2272001A3 (en) 2002-12-03

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