DE967879C - Device for moisture measurement of stacked goods in drying chambers - Google Patents

Device for moisture measurement of stacked goods in drying chambers

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Publication number
DE967879C
DE967879C DEK5667A DEK0005667A DE967879C DE 967879 C DE967879 C DE 967879C DE K5667 A DEK5667 A DE K5667A DE K0005667 A DEK0005667 A DE K0005667A DE 967879 C DE967879 C DE 967879C
Authority
DE
Germany
Prior art keywords
drying
wood
moisture
book
drying chambers
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
DEK5667A
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German (de)
Inventor
Dipl-Kfm 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.)
OTTO KIEFER DIPL KFM
Original Assignee
OTTO KIEFER DIPL KFM
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 OTTO KIEFER DIPL KFM filed Critical OTTO KIEFER DIPL KFM
Priority to DEK5667A priority Critical patent/DE967879C/en
Application granted granted Critical
Publication of DE967879C publication Critical patent/DE967879C/en
Expired legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/22Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
    • G01N27/223Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22Controlling the drying process in dependence on liquid content of solid materials or objects

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Description

Vorrichtung zur Feuchtemessung von Stapelgütern in Trockenkammern Die Erfindung betrifft eine Vorrichtung zur Feuchtemessung von Stapelgütern in Trockenkammern, wobei ein elektrisches Feuchtemeßgerät derart angeordnet ist, daß dessen Meßorgane innerhalb der Kammer während des Trockenvorgangs mit dem Gut in Berührung stehen und dessen Anzeigeorgane sich außerhalb des Trockenraumes befinden. Bei Trocknern, welche das Trockengut in abgeschlossenen Räumen trocknen, tritt immer wieder die Schwierigkeit auf, daß das Bedienungspersonal sich nur sehr umständlich Klarheit über den Trockenheitsgrad des Trockengutes während der Trocknung verschaffen kann. Man hat bei wissenschaftlichen Trockenversuchen dem Mißstand dadurch abzuhelfen versucht, daß man das Trockengut in der Kammer aufhängte und auf diese Weise die Gewichtsabnahme feststellte. In anderen Fällen wurde die gesamte Trockenkammer auf eine Bodenwaage gestellt, um den Fortschritt der Trocknung laufend kontrollieren zu können. Auf Grund dieser Vorversuche wurde dann der Trockenprozeß mittels einer Schaltuhr gesteuert, die nach Ablauf der Trockenzeit, weiche sich aus den Vorversuchen ergeben hatte, die Zufuhr weiterer Wärmeenergie abschaltete. Die ersteren exakten Methoden zur Bestimmung der Feuchtigkeit des Trockengutes während des Trockenprozesses sind für die Praxis zu teuer. Die letztere, die zeitliche Methode ist deshalb nicht immer befriedigend, weil in der Praxis Fälle vorkommen können, die durch Vorversuche nicht geklärt sind.Device for moisture measurement of stacked goods in drying chambers the The invention relates to a device for measuring the moisture of stacked goods in drying chambers, wherein an electrical moisture meter is arranged such that its measuring elements are in contact with the goods inside the chamber during the drying process and its display elements are located outside of the drying room. For dryers, who dry the items to be dried in closed rooms, occurs again and again Difficulty on the fact that the operating staff is only very awkwardly clear can provide about the degree of dryness of the dry goods during drying. One has to remedy the deficiency in scientific dry tests tried to hang the dry goods in the chamber and in this way the Noted weight loss. In other cases the entire drying chamber was open a floor scale is placed to continuously check the progress of the drying process to be able to. On the basis of these preliminary tests, the drying process was then carried out using a Timer controlled, which after the drying time has elapsed, evades from the preliminary tests had revealed, switched off the supply of further thermal energy. The former are exact Methods for determining the humidity of the Dry goods during of the drying process are too expensive in practice. The latter, the temporal method is therefore not always satisfactory because in practice there may be cases which have not been clarified by preliminary tests.

Eine eingangs erwähnte Vorrichtung geht gemäß der Erfindung davon aus, an sich bekannte Trockeneinrichtungen mit an sich bekannten elektrischen Feuchtemessern in der Weise zu kombinieren, daß zur Messung ein Probegutsteil verwendet wird und die an diesem anliegenden Teile des Meßorgans sowie deren Haltevorrichtung derart ausgebildet sind, daß sie einerseits möglichst wenig Oberfläche des Probestückes abdecken, andererseits einen möglichst geringen Windschatten des Trockenmittels verursachen, und daß gegebenenfalls in Verbindung mit dem Anzeigeorgan ein Steuerorgan für die Energiezufuhr od. dgl. wirkt. Es ist auf diese Weise möglich, außerhalb der Trockenkammer den Trockenfortschritt fortlaufend so exakt zu beobachten, wie dies Feuchtemesser ihrem Wesen nach zulassen. A device mentioned at the beginning is based on this according to the invention from, per se known drying devices with per se known electrical moisture meters to combine in such a way that a sample part is used for the measurement and the parts of the measuring element resting against this and their holding device in this way are designed that, on the one hand, they have as little surface area of the test piece as possible cover, on the other hand as little slipstream of the desiccant as possible cause, and that possibly in connection with the display organ a control organ for the energy supply or the like. Acts. It is possible that way outside the drying chamber to continuously observe the drying progress as precisely as allow this moisture meter by its nature.

Wie bereits erwähnt, müssen Anode und Kathode derart ausgebildet sein, daß sie möglichst wenig Oberfläche des Trockengutes abdecken und möglichst nur punktförmig an der Oberfläche aufsitzen. As already mentioned, the anode and cathode must be designed in this way be that they cover as little surface of the dry material as possible and as possible just sit in spots on the surface.

Außerdem muß die Halteeinrichtung für Anode und Kathode derart ausgebildet sein, daß ein wesentlicher Windschatten bei der Umwälzung des Trockenmediums an der Prüfstelle nicht entstehen kann. Im übrigen müssen die Verbindungsleitungen und die Durchführung durch die Kammer so gut abisoliert sein, daß keine Feuchtigkeitsbeeinflussung durch das Umwälzmedium auf das Meßgerät eintreten kann. An die Stelle des Feuchtemessers kann ein Steuerorgan für die Steuerung der Trocknung treten in der Weise, daß ein verstellbarer Schieber beispielsweise auf die gewünschte Endfeuchte eingestellt wird. Erreicht nun im Laufe der Trocknung der Zeiger, welcher die Feuchtigkeit des Trockengutes anzeigt, den gewünschten Endfeuchtigkeitsgrad, so berühren sich die beiden Zeiger, wodurch ein Impuls für die Abschaltung eines Teiles oder der gesamten Trockenenergie ausgelöst werden kann. Natürlich kann auf diese Weise der Trockenprozeß auch in anderer Form gesteuert werden, etwa so, daß bei der Trocknung von Holz mit Erreichen des Fasersättigungspunktes die Energiezufuhr vorübergehend oder ganz gedrosselt wird.In addition, the holding device for anode and cathode must be designed in this way be that an essential slipstream in the circulation of the drying medium the test center cannot arise. In addition, the connecting lines and the bushing through the chamber must be so well stripped that it is not affected by moisture can enter the measuring device through the circulating medium. In place of the moisture meter a controller for controlling the drying can occur in such a way that a adjustable slide, for example, set to the desired final moisture content will. Now reaches the pointer in the course of drying, which the moisture of the Dry food indicates the desired final moisture level, so the touch two pointers, creating an impulse for the disconnection of part or the whole Dry energy can be triggered. Of course, the drying process can do this in this way can also be controlled in other ways, such as when drying wood with When the fiber saturation point is reached, the energy supply is temporarily or completely throttled will.

PATENTANSPROCHE: I. Vorrichtung zur Feuchtemessung von Stapelgütern in Trockenkammern, wobei ein elektrisches Feuchtemeßgerät derart angeordnet ist, daß dessen Meßorgane innerhalb der Kammer während des Trockenvorganges mit dem Gut in Berührung stehen und dessen Anzeigeorgane sich außerhalb des Trockenraumes befinden, dadurch gekennzeichnet, daß zur Messung ein Probegutsteil verwendet wird und die an diesem anliegenden Teile des Meßorgans sowie deren Haltevorrichtung derart ausgebildet sind, daß sie einerseits möglichst wenig Oberfläche des Probestückes abdecken, andererseits einen möglichst geringen Windschatten des Trockenmittels verursachen, und daß gegebenenfalls in Verbindung mit dem Anzeigeorgan ein Steuerorgan für die Energiezufuhr od. dgl. wirkt. PATENT APPEAL: I. Device for measuring moisture in stacked goods in drying chambers, with an electrical moisture measuring device arranged in such a way that its measuring elements within the chamber during the drying process with the material are in contact and whose display elements are outside the drying room, characterized in that a sample part is used for the measurement and the formed on this adjacent parts of the measuring element and its holding device are that on the one hand they cover as little surface of the sample as possible, on the other hand cause as little slipstream of the desiccant as possible, and that if necessary in connection with the display element a control element for the energy supply or the like. works.

Claims (1)

2. Vorrichtung nach Anspruch I, dadurch gekennzeichnet, daß das Anzeigeorgan mit einem verstellbaren Kontakt ausgestattet ist, der die weitere Energiezufuhr zum Trockner einschränkt oder ganz ausschaltet, wenn ein bestimmter gewünschter Trockenheitsgrad des Trockengutes erreicht ist, oder der den Trockenprozeß in sonstiger Weise steuert. 2. Apparatus according to claim I, characterized in that the display member is equipped with an adjustable contact that provides additional energy Restricts the dryer or switches it off completely if a certain desired Degree of dryness of the dry goods is reached, or the drying process in other Way controls. In Betracht gezogene Druckschriften: Zeitschrift »Holz als Roh- und Werkstoff«, Mai I939, S. I69 bis I72; »Der Chemie-Ingenieur«, Bd. II, dritter Teil, 1933, S. i58 und 97; Buch »Messung von Zustandsgrößen im Betriel)e« von M. Jakob, Akad. Verlagsgesellschaft m. b. H., I933, S. 97; Buch »Technologie des Holzes«, 1936, S. 73, von Kollmann, Verlag Springer, Berlin; Forschungsberichte Holz, I935, Heft 5; Aufsatz »Die Bestimmung der Holzfeuchtigkeit durch Messung des elektrischen Widerstandes« von Dr.-Ing. E. Nusser; deutsche Patentschriften Nr. 7I4257, 571 117, 64 126. Publications considered: magazine »Holz als Roh- und Material ", May 1939, pp. 169 to 172; "The chemical engineer", Vol. II, third part, 1933, pp. I58 and 97; Book "Measurement of State Variables in Betriel) e" by M. Jakob, Akad. Verlagsgesellschaft m. B. H., 1933, p. 97; Book »Technology of Wood«, 1936, p. 73, von Kollmann, Verlag Springer, Berlin; Research reports wood, I935, Booklet 5; Essay »The determination of wood moisture by measuring the electrical Resistance «by Dr.-Ing. E. Nusser; German patents No. 7I4257, 571 117, 64 126.
DEK5667A 1950-07-27 1950-07-27 Device for moisture measurement of stacked goods in drying chambers Expired DE967879C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK5667A DE967879C (en) 1950-07-27 1950-07-27 Device for moisture measurement of stacked goods in drying chambers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK5667A DE967879C (en) 1950-07-27 1950-07-27 Device for moisture measurement of stacked goods in drying chambers

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DE967879C true DE967879C (en) 1957-12-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178787B (en) * 1959-06-11 1964-09-24 Centre Nat Rech Scient Method and device for the automatic control of a freeze-drying
DE1275473B (en) * 1961-12-23 1968-08-14 Gann App Und Maschb G M B H Procedure for operating wood drying chambers
DE2917513A1 (en) * 1979-04-30 1980-11-06 Bollmann L Kg Process-controlled timber seasoning chamber - has humidity and temp. cycles controlled to suit inherent measured humidity in timber stack

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE64126C (en) * 1892-02-05 1892-08-31 H. KORI in Berlin W., Königin-Augustastrafse 13 p Process for the automatic closing of the desiccant inlet and outlet openings on drying devices
DE571117C (en) * 1930-10-07 1933-02-23 Franz Schenk Device for measuring and displaying the moisture content of moist material, in particular wood, during treatment in drying chambers
DE714257C (en) * 1938-06-14 1941-11-25 Paul Lippke Drying vessel with moisture meter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE64126C (en) * 1892-02-05 1892-08-31 H. KORI in Berlin W., Königin-Augustastrafse 13 p Process for the automatic closing of the desiccant inlet and outlet openings on drying devices
DE571117C (en) * 1930-10-07 1933-02-23 Franz Schenk Device for measuring and displaying the moisture content of moist material, in particular wood, during treatment in drying chambers
DE714257C (en) * 1938-06-14 1941-11-25 Paul Lippke Drying vessel with moisture meter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178787B (en) * 1959-06-11 1964-09-24 Centre Nat Rech Scient Method and device for the automatic control of a freeze-drying
DE1275473B (en) * 1961-12-23 1968-08-14 Gann App Und Maschb G M B H Procedure for operating wood drying chambers
DE2917513A1 (en) * 1979-04-30 1980-11-06 Bollmann L Kg Process-controlled timber seasoning chamber - has humidity and temp. cycles controlled to suit inherent measured humidity in timber stack

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