EP0498961B1 - Vorrichtung zum Trocknen von Holz - Google Patents

Vorrichtung zum Trocknen von Holz Download PDF

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Publication number
EP0498961B1
EP0498961B1 EP91121843A EP91121843A EP0498961B1 EP 0498961 B1 EP0498961 B1 EP 0498961B1 EP 91121843 A EP91121843 A EP 91121843A EP 91121843 A EP91121843 A EP 91121843A EP 0498961 B1 EP0498961 B1 EP 0498961B1
Authority
EP
European Patent Office
Prior art keywords
air
drying
circulating
fans
wood
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.)
Expired - Lifetime
Application number
EP91121843A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0498961A1 (de
Inventor
Josef Kronseder
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT91121843T priority Critical patent/ATE102336T1/de
Publication of EP0498961A1 publication Critical patent/EP0498961A1/de
Application granted granted Critical
Publication of EP0498961B1 publication Critical patent/EP0498961B1/de
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
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers

Definitions

  • the invention relates to a device for drying wood or other goods, with an elongated, cylindrical outer housing and a front cover, an elongated cylindrical heating shield arranged coaxially inside the housing, which encloses the actual drying chamber and on the outside with the
  • the inner casing of the circulating air duct is limited, as well as with a vacuum device and an air circulation device on the end face opposite the sealing cover.
  • Such a device is known from DE-A-35 43 248.
  • the air warmed up by the heating shield is blown lengthways through the wood stacked in the drying room enclosed by the heating shield.
  • the wood has to be re-stacked from the storage location, since it is usually stored on continuous strips.
  • the object of the present invention is to redesign a device known for longitudinal ventilation with simple means in such a way that the introduced wood can be dried more quickly and more uniformly without the wood being stacked for a drying cycle got to.
  • the drying space is closed at the end toward the air circulation device with a partition wall covering the end of the heating shield, that the space between the heating shield and the outer housing is divided by radial partition walls into an upper, a lower and two lateral air circulation ducts and that Heating shield in the area of the side air circulation ducts, which are sealed off from the closure cover, has air slots for cross ventilation of the wood stacked in the drying space, and the drying air is returned from the loading end of the drying space to the air circulation device via the upper air circulation duct.
  • the heating shield has transverse slots on one side only in the front area of one side air circulation duct and on the other side only in the rear area of the opposite air circulation duct.
  • the recirculating air duct located below has an elongated cooling register and can be acted upon parallel to the lateral recirculating air ducts, so that part of the circulated air is always recooled and freed from the water vapor carried by falling below the dew point.
  • the air circulation device consists of a plurality of separately controllable fans.
  • a method for operating such a drying device has proven particularly expedient, in which, according to the invention, the air is circulated only by a part of the fans in the warm-up phase and by a larger number of fans in the dry phase with the generation of a vacuum.
  • the drying device has an outer cylindrical housing 1 with an end closure cover 2 as the loading opening and a closed end wall 3, on the inside of which an air circulation device 4 in the form of several fans is arranged.
  • An elongated cylindrical heating shield 5 is arranged inside the cylindrical insulated housing 1 and coaxially therewith, which consists of a double jacket with heating pipes in between and which is heated from the outside via a heating boiler.
  • the interior of this heating shield 5 forms the actual drying chamber 6, in which, as can be seen from FIG. 2, corresponding long timber 7 is stacked on a carriage 8 and is retracted via the opened closure cover 2.
  • the drying chamber 6 or the heating shield 5 is closed on its inner end face opposite the fans 4 with a closed end wall 9. Furthermore, the annular space enclosed by the outer jacket of the heating shield 5 and by the inner surface of the housing 1 - as can be seen in particular from the cross section according to FIG. 2 - is divided by radial partition walls 10, 11, 12, 13, so that an upper air circulation duct 14, two side air ducts 15 and 16 and a lower air duct 17 are formed.
  • the side air circulation ducts at the end of the heating shield 5 on the cover side are sealed off via corresponding transverse walls 18 and 19 from the front space 20 between the closure cover 2 and the end of the heating shield 5, while the actual drying space 6 and the upper and lower air circulation ducts 14 and 17 lead to the end space 20 are open.
  • the heating shield 5 has air slots 21 and 22 leading radially inwards in the area covered laterally by the air circulation ducts 15 and 16 for transverse ventilation of the wood stack 7. It is included for optimal airflow and swirling Of particular advantage if, for example, starting from the left air circulation duct 15, the air slots 21 are only provided in the front half of the heating shield 5 adjacent to the fans 4, while on the opposite side, starting from the air circulation duct 16, the air slots 22 are only provided in the rear half of the heating shield 5 are provided. This means that the cross-flowing air does not encounter a counterflow, but can extend over the entire width of the stack.
  • a vacuum pump 24 is also provided for generating a vacuum in the drying room 6.
  • cooling registers 25 are arranged in the lower air circulation duct 17 in order to cool back part of the moisture-laden air and, in doing so, to achieve a precipitation of the water vapor loading by falling below the dew point.
  • a part of the circulating air is conveyed by the fans 4 practically in a bypass through the lower circulating air duct 17 to the front space 20, this proportion of air sweeping along the cooling register 25, is cooled there and releases a large part of the absorbed moisture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Drying Of Solid Materials (AREA)
EP91121843A 1991-02-15 1991-12-19 Vorrichtung zum Trocknen von Holz Expired - Lifetime EP0498961B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91121843T ATE102336T1 (de) 1991-02-15 1991-12-19 Vorrichtung zum trocknen von holz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4104768 1991-02-15
DE4104768A DE4104768C1 (enExample) 1991-02-15 1991-02-15

Publications (2)

Publication Number Publication Date
EP0498961A1 EP0498961A1 (de) 1992-08-19
EP0498961B1 true EP0498961B1 (de) 1994-03-02

Family

ID=6425167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121843A Expired - Lifetime EP0498961B1 (de) 1991-02-15 1991-12-19 Vorrichtung zum Trocknen von Holz

Country Status (3)

Country Link
EP (1) EP0498961B1 (enExample)
AT (1) ATE102336T1 (enExample)
DE (2) DE4104768C1 (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19543412A1 (de) * 1995-11-21 1997-05-22 Waldner Gmbh & Co Hermann Trockner, insbesondere für die chemische oder pharmazeutische Industrie

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR986549A (fr) * 1949-03-11 1951-08-01 Perfectionnements aux séchoirs à bois
IT1032926B (it) * 1975-05-19 1979-06-20 Pagnozzi Ernesto Guglielmo Procedimento a vuoto per essiccare legname massiccio particolarmente per essiccare legname delicato e o facilmente collassabile
IT1071276B (it) * 1976-05-12 1985-04-02 Pagnozzi Ernesto Guglielmo Perfezionamenti nei procedimenti e negli impianti di essiccazione del legname..particolarmente negli impianti che impiegano il vuoto
JPS53103261A (en) * 1977-02-19 1978-09-08 Kitagawa Iron Works Co Method of drying wooden products and apparatus therefor
ES8604347A1 (es) * 1984-10-18 1986-02-01 Aranguren Ind Sa Maquina para el secado de la madera.
DE3543248A1 (de) * 1985-12-06 1987-06-11 Josef Kronseder Vorrichtung zum trocknen von holz
FR2614682A1 (fr) * 1987-04-30 1988-11-04 Giuliani Lando Procede et dispositif de sechage d'un corps dans lequel une partie de l'humidite a extraire est retenue dans des cellules fermees
DE8812056U1 (de) * 1988-09-23 1989-01-19 Wolf Stahlbau Gmbh U. Co Kg, 8069 Geisenfeld Vorrichtung zum Trocknen von Hopfen in Hopfentrocknungsanlagen
DE9005827U1 (de) * 1990-05-22 1990-08-23 Kronseder, Josef, 8313 Vilsbiburg Vorrichtung zum Trocknen von Holz

Also Published As

Publication number Publication date
DE59101105D1 (de) 1994-04-07
DE4104768C1 (enExample) 1992-03-12
ATE102336T1 (de) 1994-03-15
EP0498961A1 (de) 1992-08-19

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