DE825078C - Method and device for drying hardwood - Google Patents

Method and device for drying hardwood

Info

Publication number
DE825078C
DE825078C DEP48625A DEP0048625A DE825078C DE 825078 C DE825078 C DE 825078C DE P48625 A DEP48625 A DE P48625A DE P0048625 A DEP0048625 A DE P0048625A DE 825078 C DE825078 C DE 825078C
Authority
DE
Germany
Prior art keywords
drying
saturation point
fiber saturation
reached
hardwood
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
Application number
DEP48625A
Other languages
German (de)
Inventor
Otto Bolay
Dipl Oec Otto Kiefer
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.)
GG KIEFER MASCHF
Original Assignee
GG KIEFER MASCHF
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 GG KIEFER MASCHF filed Critical GG KIEFER MASCHF
Priority to DEP48625A priority Critical patent/DE825078C/en
Application granted granted Critical
Publication of DE825078C publication Critical patent/DE825078C/en
Expired legal-status Critical Current

Links

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
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Description

Verfahren und Vorrichtung zur Trocknung von Hartholz Die Erfindung betrifft ein Verfahren zum Trocknen von Hartholz mit einer Anfangsfeuchte über dem Fasersättigungspunkt. Bei der Trocknung von Holz mit Temperaturen über ioo° C hat sich ergeben, daß Weichholz von jedem Anfangsfeuchtigkeitsgrad an getrocknet werden kann, ohne Schaden zu erleiden, während Hartholz mit mehr als 35010 Anfangsfeuchte Risse bekommt. Dies ist darauf zurückzuführen, daß die Luft über ioo° C nicht mit ioo°/o relativer Feuchtigkeit gesättigt werden kann und das frische Hartholz bei Beginn dieser Art der Trocknung sofort an der Oberfläche verschalt, während Weichholz von innen heraus Feuchtigkeit abgibt und deshalb den Feuchtigkeitsfluß nicht abreißen läßt.Method and device for drying hardwood The invention relates to a method for drying hardwood with an initial moisture content above the fiber saturation point. When drying wood at temperatures above 100 ° C., it has been shown that softwood can be dried from any initial moisture level without suffering damage, while hardwood with an initial moisture content of more than 35,010 cracks. This is due to the fact that the air above 100 ° C cannot be saturated with 100% relative humidity and the fresh hardwood immediately joins the surface at the start of this type of drying, while softwood releases moisture from the inside and therefore the moisture flow does not tear off.

Das neue Verfahren löst die Frage, wie sich die Vorteile der Trocknung mit Temperaturen über 10o° C,auch auf frisches Hartholz wenigstens teilweise anwenden lassen. Nach dem neuen Verfahren wird die Trocknung in zwei Stufen durchgeführt. Bei der ersten Stufe wird mit Temperaturen unter 10o° C bis zum Fasersättigungspunkt heruntergetröcknet. In der zweiten Stufe wird vom Fasersättigungspunkt an mit Temperaturen über ioo° C bis zu der gewünschten Endfeuchte herabgetrocknet. Dies kann in der gleichen Kammer durch Umschalten eines Thermostaten von dem niedrigeren auf den höheren Temperatufbereich erfolgen.The new process solves the question of what the benefits of drying are at temperatures above 10o ° C, also apply at least partially to fresh hardwood permit. According to the new process, drying is carried out in two stages. The first stage is with temperatures below 10o ° C up to the fiber saturation point drunk down. The second stage starts with the fiber saturation point with temperatures dried over 100 ° C to the desired final moisture content. This can be done in the same chamber by switching one thermostat from the lower one to the higher temperature range.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Trocknung von Hartholz mit einer Anfangsfeuchte über dem Fasersättigungspunkt, dadurch gekennzeichnet, daß die Trocknung bis zum Erreichen des Fasersättigungspunktes mit Temperaturen unter 1000 C, nach Erreichen des Fasersättigungspunktes mit Temperaturen über 10o° C durchgeführt wird. PATENT CLAIMS: i. Process for drying hardwood with an initial moisture content above the fiber saturation point, characterized in that drying is carried out until the fiber saturation point is reached at temperatures below 1000 C, after the fiber saturation point is reached at temperatures above 100 ° C. 2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß ein Thermostat angeordnet ist, welcher die Konditionierung in der Kammer von Hand oder automatisch bei Erreichen des Fasersättigungspunktes von dem Temperaturbereich unter 100° C in den höheren umschaltet. Angezogene Druckschriften: Mitteilungen aus den Forschungsanstalten des Gutehoffnungshütten-honzeriis, lieft 5, "Mai 1931, S. 119 bis 122. :Mitteilungen des Fachausschusses für Holzfragen beim VDI und Deutschen Forstverein, Vorträge der Sommersitzung 194o, Aufsatz von Fr. NT e r k e 1 »EinfluB des Sprühens auf die Spannungen im Holz während des Trocknens« S. 81 bis 84.2. Apparatus for performing the method according to claim i, characterized in that a thermostat is arranged, which the conditioning in the chamber by hand or automatically when the fiber saturation point is reached switches from the temperature range below 100 ° C to the higher one. Referred publications: Messages from the research institutes of the Gutehoffnungshütten-honzeriis, ran 5, "May 1931, pp. 119 to 122.: Communications of the technical committee for wood questions at VDI and German Forest Association, lectures at the summer meeting 194o, essay by Ms. NT e r k e 1 »Influence of spraying on the tension in the wood during drying« Pp. 81 to 84.
DEP48625A 1949-07-13 1949-07-13 Method and device for drying hardwood Expired DE825078C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP48625A DE825078C (en) 1949-07-13 1949-07-13 Method and device for drying hardwood

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP48625A DE825078C (en) 1949-07-13 1949-07-13 Method and device for drying hardwood

Publications (1)

Publication Number Publication Date
DE825078C true DE825078C (en) 1951-12-17

Family

ID=7383200

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP48625A Expired DE825078C (en) 1949-07-13 1949-07-13 Method and device for drying hardwood

Country Status (1)

Country Link
DE (1) DE825078C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1017539B (en) * 1952-05-27 1957-10-10 Schilde Maschb Ag Process and device for the automatic control of drying systems
DE1103256B (en) * 1956-03-08 1961-03-23 Hans Kuebler Procedure for removing formwork from dried wood
DE3225426A1 (en) * 1982-07-07 1984-01-12 Blomberger Holzindustrie B. Hausmann GmbH & Co KG, 4933 Blomberg Process and apparatus for the drying of veneers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1017539B (en) * 1952-05-27 1957-10-10 Schilde Maschb Ag Process and device for the automatic control of drying systems
DE1103256B (en) * 1956-03-08 1961-03-23 Hans Kuebler Procedure for removing formwork from dried wood
DE3225426A1 (en) * 1982-07-07 1984-01-12 Blomberger Holzindustrie B. Hausmann GmbH & Co KG, 4933 Blomberg Process and apparatus for the drying of veneers

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