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WO1996011391A1 - Procede permettant de determiner le pourcentage d'humidite de pulpes pressees - Google Patents

Procede permettant de determiner le pourcentage d'humidite de pulpes pressees Download PDF

Info

Publication number
WO1996011391A1
WO1996011391A1 PCT/DE1995/001302 DE9501302W WO9611391A1 WO 1996011391 A1 WO1996011391 A1 WO 1996011391A1 DE 9501302 W DE9501302 W DE 9501302W WO 9611391 A1 WO9611391 A1 WO 9611391A1
Authority
WO
WIPO (PCT)
Prior art keywords
moisture content
chips
drum
weight
pulp
Prior art date
Application number
PCT/DE1995/001302
Other languages
German (de)
English (en)
Inventor
Bernd Langhans
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1996011391A1 publication Critical patent/WO1996011391A1/fr

Links

Classifications

    • 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
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • F26B25/225—Controlling the drying process in dependence on liquid content of solid materials or objects by repeated or continuous weighing of the material or a sample thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture

Definitions

  • the invention relates to a method for determining the moisture content of pressed chips, in particular in the automatic process control of a plant for sugar production.
  • sugar beet supplied In sugar production, the processing of the sugar beet supplied is of major importance.
  • the sugar beets are first crushed into chips, from which the so-called raw juice is extracted.
  • the remaining chips are further processed in large-volume chip drying plants.
  • the object of the invention is therefore to propose a method with which the moisture content of pressed chips can be detected objectively.
  • the object is achieved in that the moisture content of the chips is determined by means of a weight measurement.
  • the weight measurement is advantageously carried out directly at the feed screw of the drum for drying the schnitzel. To do this, the entire feed screw is weighed in particular. The latter can take place continuously or discontinuously in the production process.
  • the invention is based on the experience that essentially water determines the weight of the chips.
  • the moisture content of the pressed chips can thus be inferred from the weight measurement. This is made possible by measuring the weight directly on the feed screw of the drum dryer.
  • a conventional drum of a chip drying system is identified by 10.
  • a drum 10 which has a length of approximately 20 m and a diameter of 5 hours, is assigned specific means 11 for rotation about its longitudinal axis, which are not discussed in more detail in this context.
  • Temperature sensors are present at various locations on the drum 10, for example the sensors 12 to 14.
  • the moisture of the dried schnitzel can be measured using a sensor
  • the chips are introduced as raw material into the drum 10 via a so-called screw-in or feed screw 5.
  • the feed screw 5 is usually part of the drum.
  • the feed screw 5 is decoupled from the drum 10 in such a way that it can be weighed on its own.
  • a first signal for the absolute amount of the chips entry and a second signal for the difference ⁇ of the chips entry can be obtained, the measuring points of which are denoted by 7 and 8 in the figure.
  • the weight signals obtained by weighing are evaluated together with the speed of the feed screw 5, which gives a direct measure of the water content and the amount of press chips supplied. In order to improve the control of the entire system, a statement about the current tendency of the moisture content may be sufficient.
  • a fuzzy system 20 with inputs 21 to 26 and an output 28.
  • the temperature measured values of the sensors 12 and 13, the quantity of the presses are used as further input signals for the fuzzy system 20 schnitzel, the difference in the amount of chips, the temperature at the exit of the drum 10 and the moisture of the chips after the drum 10 is detected.
  • a signal is delivered from the output 28 of the fuzzy unit 20, which is fed via a software PID function block 29 to a compound controller 30 for the burner output. From the compound controller 30 signals to a motor 35 for the Rotation of the drum 10 on the one hand and on an actuator 40 for the burner, not shown, on the other hand. This means that the entire wood-chip drying system can be operated automatically.

Landscapes

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

Abstract

Dans une installation de séchage de pulpes, il est important de prendre en compte le pourcentage d'eau que les pulpes pressées introduites contiennent, notamment pour un mode opératoire automatique. Selon l'invention, le pourcentage d'humidité des pulpes est déterminé par mesure du poids, qui s'effectue directement sur la vis sans fin de chargement du tambour, ladite vis sans fin de chargement, montée de manière autonome, pouvant être pesée dans sa globalité. Le signal d'humidité dérivé de la mesure de poids peut être introduit conjointement avec d'autres signaux dans les entrées (21 à 26) d'une unité à logique floue (20). La sortie (28) fournit un signal pour un régulateur combiné (30).
PCT/DE1995/001302 1994-10-07 1995-09-21 Procede permettant de determiner le pourcentage d'humidite de pulpes pressees WO1996011391A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4435808.3 1994-10-07
DE19944435808 DE4435808A1 (de) 1994-10-07 1994-10-07 Verfahren zur Bestimmung des Feuchtegehaltes von Preßschnitzeln

Publications (1)

Publication Number Publication Date
WO1996011391A1 true WO1996011391A1 (fr) 1996-04-18

Family

ID=6530152

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001302 WO1996011391A1 (fr) 1994-10-07 1995-09-21 Procede permettant de determiner le pourcentage d'humidite de pulpes pressees

Country Status (3)

Country Link
DE (1) DE4435808A1 (fr)
TR (1) TR199501222A2 (fr)
WO (1) WO1996011391A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107014156A (zh) * 2017-04-26 2017-08-04 常州广建仪器科技有限公司 被干燥物含水量测量方法、真空干燥装置及其控制方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19919206A1 (de) * 1999-04-28 2000-11-02 Buehler Ag Verfahren zur Herstellung von Teigwaren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068917B (fr) *
DE1604806A1 (de) * 1963-12-27 1971-01-21 Buettner Schilde Haas Ag Verfahren zur Herstellung gleichmaessig abgetrockneter Futtermittel,insbesondere Diffusionsschnitzel
FR2053730A5 (en) * 1969-07-16 1971-04-16 Besson Guyard Maurice Continuous determination of sugar in vege-table products
US4179265A (en) * 1977-10-17 1979-12-18 Holly Sugar Corporation Method and apparatus for operating rotary driers
FR2699280A1 (fr) * 1992-12-11 1994-06-17 Mg Entreprise Procédé et dispositif de mesure en continu in situ du taux d'humidité de produits en vrac en cours de séchage.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1673353A1 (de) * 1967-06-10 1971-09-02 Waldhof Aschaffenburg Papier Verfahren und Vorrichtung zur Bestimmung des Feuchtigkeitsgehaltes von Hackschnitzeln aus Holz
DD226378A1 (de) * 1984-07-30 1985-08-21 Hermsdorf Keramik Veb Vorrichtung zur dichteregelung von stroemenden feststoffsuspensionen
DE9318691U1 (de) * 1993-12-07 1994-07-07 Frede, Wilhelm E., 40547 Düsseldorf Multifunktionale Meßeinrichtung für die gravimetrische Ermittlung von Schüttdichte und Massestrom fließfähiger Schüttgüter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068917B (fr) *
DE1604806A1 (de) * 1963-12-27 1971-01-21 Buettner Schilde Haas Ag Verfahren zur Herstellung gleichmaessig abgetrockneter Futtermittel,insbesondere Diffusionsschnitzel
FR2053730A5 (en) * 1969-07-16 1971-04-16 Besson Guyard Maurice Continuous determination of sugar in vege-table products
US4179265A (en) * 1977-10-17 1979-12-18 Holly Sugar Corporation Method and apparatus for operating rotary driers
FR2699280A1 (fr) * 1992-12-11 1994-06-17 Mg Entreprise Procédé et dispositif de mesure en continu in situ du taux d'humidité de produits en vrac en cours de séchage.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NAKAMURA M ET AL: "Experimental analysis and fundamental investigation on constructing a fish-drying process control system", TRANSACTIONS OF THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS, JULY 1994, JAPAN, vol. 30, no. 7, ISSN 0453-4654, pages 861 - 870 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107014156A (zh) * 2017-04-26 2017-08-04 常州广建仪器科技有限公司 被干燥物含水量测量方法、真空干燥装置及其控制方法

Also Published As

Publication number Publication date
TR199501222A2 (tr) 1996-07-21
DE4435808A1 (de) 1996-04-11

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