EP0882222A1 - Procede et dispositif permettant de mettre a disposition des echantillons de produits en vrac pour l'analyse de constituants - Google Patents

Procede et dispositif permettant de mettre a disposition des echantillons de produits en vrac pour l'analyse de constituants

Info

Publication number
EP0882222A1
EP0882222A1 EP97942948A EP97942948A EP0882222A1 EP 0882222 A1 EP0882222 A1 EP 0882222A1 EP 97942948 A EP97942948 A EP 97942948A EP 97942948 A EP97942948 A EP 97942948A EP 0882222 A1 EP0882222 A1 EP 0882222A1
Authority
EP
European Patent Office
Prior art keywords
analysis
bulk material
flow
window
conveyor
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.)
Withdrawn
Application number
EP97942948A
Other languages
German (de)
English (en)
Inventor
Jörg SAATHOFF
Eckhard Nehring
Hartmut Hoyer
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.)
BRAN and LUEBBE
SPX Flow Technology Germany GmbH
Original Assignee
BRAN and LUEBBE
Bran und Luebbe GmbH
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 BRAN and LUEBBE, Bran und Luebbe GmbH filed Critical BRAN and LUEBBE
Publication of EP0882222A1 publication Critical patent/EP0882222A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G27/00—Jigging conveyors
    • B65G27/02—Jigging conveyors comprising helical or spiral channels or conduits for elevation of materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials

Definitions

  • the invention relates to a method and a device for providing bulk material samples for the, preferably optical, analysis of substances.
  • NIR spectroscopy Near infrared spectroscopy
  • the substances to be analyzed are irradiated with light and the absorption or reflection properties and / or transmission properties of the sample are evaluated for the quantitative and qualitative determination of the ingredients.
  • Samples in a fluid state are usually irradiated for this purpose, while solids or solids suspended in the fluid phase are examined for their reflective properties.
  • the various methods are described, for example, in the book by Osborn, B.G. et al. "Near Infrared Spectroscopy in Food Analysis", Longman Group U.K. Limited, 1986.
  • a method known from US Pat. No. 4,883,963, for example, is suitable for analysis, in which the sample is irradiated in incident light, which has different wavelengths by means of an acousto-optically tunable filter.
  • the light reflected from the sample is collected by an integrating sphere and directed to sensors that generate a corresponding electrical measurement signal.
  • the integrating ball used is known from DE 3466435.
  • Diode line interferometers possible, as described for example in WO 81/00775 or US 4,627,008.
  • Beam path have two separate paths, the beam of one path being used as a reference beam and the other as a measuring beam, as described, for example, in US Pat. No. 4,663,961.
  • a partial stream is branched off for the online analysis and is passed through a specially designed sample cell.
  • the sample cell forces the partial flow into a laminar flow with a constant layer thickness, such as in the above. Book by Osborn described on page 72.
  • sampling systems have been developed that are intended to enable continuous sample presentation.
  • the systems that work in a touching manner include, for example, the system according to WO89 / 09388. With this system, the sample is covered by a moving belt. The disadvantage here is that the tape the spectrum is characteristically falsified. The sample is in a container.
  • the sample is transferred by gas to a fluidized bed in which the sensor is arranged.
  • the device known from WO 95/24633 has a flap which smoothes and compresses the surface of the sample before the measurement.
  • Such additional measures are complex and increase the risk of breakdowns.
  • the object of the invention is therefore to provide a method and a device with which bulk material samples can be provided simply and safely for analysis of the ingredients with reproducible sample constitution.
  • Bulk material is placed on a vibratory conveyor, which generates torsional vibrations or rotary-stroke vibrations and conveys the bulk material as current to the measuring location of a sensor for analysis.
  • the method can bring advantages not only in optical analysis methods, but also in the measurement of other parameters, such as the moisture or conductivity of minced meat, cheese etc.
  • the bulk material is surprisingly evenly compressed, so that reproducible analysis results can be obtained. This also applies to other non-optical measurements.
  • the measure that the bulk material is conveyed in a constant layer thickness is also very important in order to obtain reproducible analysis results.
  • vibratory conveyors can be regulated well, so that constant conditions for the layer thickness and its consistency can also be created in this way, which is advantageous for the analysis.
  • the process also allows continuous processes to be monitored online when the flow is on the bulk material is taken from a continuous product stream.
  • the reproducibility of the analysis results is improved by interrupting the vibratory conveyor's request for the duration of the analysis.
  • the measure has proven to be very positive, especially for spectrometers with filter wheels, where an analysis takes several seconds.
  • Disruptive material input from the outside is avoided if the claim is made in a claim container closed at the top. This allows the bulk material flow to be hermetically sealed from the environment, which is very advantageous in many processes. In this way, substances introduced into the environment cannot falsify the measurement result. In addition, it is avoided in the opposite direction that product m crosses the environment.
  • a requirement has proven to be particularly suitable in which the requirement is helical due to torsional vibrations.
  • the requirement can run here in a closed pot except for the inlet and outlet, in which, for example, the constant layer height is ensured by an overflow.
  • This helical requirement also provides for the constructive implementation of the method
  • the bulk material flow can be branched off from a product flow and can easily be returned to it after the analysis.
  • the flow is advantageously irradiated for analysis and the reflection is evaluated. Combinations of these methods are also possible.
  • a device for providing bulk material samples for the, preferably optical, analysis of contents which has an oscillating conveyor for conveying the bulk material, which is designed to generate rotating or rotating stroke vibrations.
  • the vibratory conveyor conveys the bulk material flow particularly evenly under reproducible conditions.
  • the device has a delivery container that is closed at the top, can
  • the device can also be designed to be explosion-proof and be used in a potentially explosive atmosphere.
  • the delivery container has at least one window.
  • the light necessary for analysis can shine through this window. It is therefore not necessary, for example by means of an optical waveguide, to bring the light into the delivery container first. In this way, mechanically highly stressed connections to the vibrating part of the device are advantageously avoided.
  • An analysis with transmission measurement is made possible if the conveying container has a second window on the side opposite the first window.
  • the layer thickness can advantageously be easily adjusted if the conveying container has a template for regulating the layer thickness, preferably as a constriction in the region of the window or windows or in the region of the reflector.
  • a template for regulating the layer thickness preferably as a constriction in the region of the window or windows or in the region of the reflector.
  • a flattening of the trough provided in the area of the window acts as a template.
  • the flow rate in the area of the measurement is constant.
  • the window or windows are arranged at a distance from the bulk material flow. This prevents the window from becoming dirty.
  • the window which advantageously consists of sapphire, can also come into direct contact with the bulk material flow. The window is then subjected to constant cleaning due to the abrasive properties of the bulk material flow. The hard sapphire prevents the bulk material from leaving signs of wear on the window.
  • a spectrometer in particular an NIR spectrometer, is preferably provided as the device for analysis, leads to a particularly advantageous combination of analysis device and sampling device.
  • a synchronization is provided between the device for analysis and the device, which is designed to switch off the vibratory conveyor for the duration of the analysis. This measure has proven to be particularly advantageous in the case of analytical devices which have a long measurement duration, for example in the case of spectrometers which work with filter wheels.
  • the conveyor is designed as a spiral conveyor, the bulk material flow can be connected to the product flow in a structurally advantageous manner.
  • the embodiment of the invention that the conveying container is connected to a CIP cleaning device is of paramount importance. This is the only way to meet a series of hygienic regulations.
  • Has product line or a collecting device from which the bulk material flow as a partial flow of a continuous product flow by means of a Sampling tube can be branched, continuous production processes of bulk materials can also be monitored with the aid of the device.
  • the entire system, including the sampling device, is also CIP-compatible.
  • Product losses are advantageously avoided if the device has a return line to the product line through which the bulk material flow can be fed to the product flow.
  • the invention is in a preferred
  • Figure 1 is a side view of the device according to the invention with sampling tube and optical module and
  • Figure 2 is a plan view of the sampling tube and the device according to the invention.
  • 1 denotes the oscillating drive for the conveying container 2 of the sampling device.
  • the optical module 3 of an analysis device for example a spectrometer, is arranged above the conveying container 2.
  • the conveying container 2 is charged with bulk material via a removal line 4 and a feed funnel 10.
  • the bulk material to be analyzed is branched off from a product stream 5 which flows through a sampling tube 6.
  • a suitable frame 8 is used to support the individual parts.
  • Sampling line 4 has an opening cross section 9, which takes up part of the free cross section of the sampling tube 6.
  • This conveying container is closed at the top and has a window 11 over approximately half the conveying path through which the bulk material flow flowing beneath it can be analyzed.
  • the vibrating delivery container is connected to the fixed sampling tube 6 or the fixed sampling and return line via elastic connections 12.
  • the device according to the invention avoids a complex sample preparation device.
  • the sampling tube is designed to be depressurized. So that the measuring system for maintenance and testing of the sampling device can be separated from the production facilities, it is advisable to arrange flap valves in front of and behind the sampling tube.
  • the sampling line is designed so that the
  • the container is continuously loaded with the bulk material to be analyzed.
  • the excess product flows past the sampling line as soon as it is filled.
  • the feed hopper 10 leads so there is always material, so that it is possible to operate the analysis system continuously.
  • the flattened U-shaped delivery container 2 which is mounted on the top of the vibratory drive 1, enables the bulk material to be defined
  • the device according to the invention makes it possible for the first time to supply various types of powders, small pellets and other granules as bulk material for continuous optical analysis.
  • the optical or the optical window can be different and the requirements of the optical Analysis unit 3 and the applied spectroscopic method can be arranged accordingly.
  • the measurement data processing system belonging to the optical module can be set up remotely from the optical module.
  • the use of the vibratory conveyor in particular the spiral conveyor, makes it possible to transport other, soft bulk goods, for example pieces of meat, or flaky, for example shredded foam.
  • the use of the vibratory conveyor is preferably used to achieve a certain conveying quality of the material to be conveyed for subsequent measuring processes. Conveying quality in the above-mentioned sense includes, among other things, a constant delivery head, constant compression or even

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Jigging Conveyors (AREA)

Abstract

L'invention concerne un procédé permettant de mettre à disposition des échantillons de produits en vrac, en vue de l'analyse optique de substances. Selon l'invention, le produit en vrac est déposé sur un convoyeur oscillant qui produit des oscillations tournantes ou des oscillations tournantes et ascendantes et achemine le produit en vrac sous forme de flux ayant une épaisseur de couche constante, jusqu'au point de mesure d'un détecteur, en vue de l'analyse. L'acheminement assuré par le convoyeur oscillant peut être interrompu pendant la durée de l'analyse. Le flux acheminé est alors soumis à une analyse spectroscopique. L'invention concerne en outre un dispositif permettant de mettre ledit procédé en oeuvre, qui comprend un convoyeur oscillant (1, 2) pour acheminer les produits en vrac (5), se présentant de manière à produire des oscillations tournantes et ascendantes, ainsi que de préférence un récipient de transport (2) comportant une fenêtre, qui est fermé en haut.
EP97942948A 1996-10-29 1997-09-18 Procede et dispositif permettant de mettre a disposition des echantillons de produits en vrac pour l'analyse de constituants Withdrawn EP0882222A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19644871 1996-10-29
DE19644871A DE19644871A1 (de) 1996-10-29 1996-10-29 Verfahren und Vorrichtung zur Bereitstellung von Schüttgutproben für die Analyse von Inhaltsstoffen
PCT/EP1997/005114 WO1998019149A1 (fr) 1996-10-29 1997-09-18 Procede et dispositif permettant de mettre a disposition des echantillons de produits en vrac pour l'analyse de constituants

Publications (1)

Publication Number Publication Date
EP0882222A1 true EP0882222A1 (fr) 1998-12-09

Family

ID=7810272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97942948A Withdrawn EP0882222A1 (fr) 1996-10-29 1997-09-18 Procede et dispositif permettant de mettre a disposition des echantillons de produits en vrac pour l'analyse de constituants

Country Status (4)

Country Link
EP (1) EP0882222A1 (fr)
JP (1) JP2000503400A (fr)
DE (1) DE19644871A1 (fr)
WO (1) WO1998019149A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005001850B4 (de) * 2005-01-10 2007-11-15 Ese Embedded System Engineering Gmbh Messeinrichtung und Verfahren zum Messen einer Größe einer Flüssigkeit
DE102019109054A1 (de) * 2019-04-05 2020-10-08 Rwe Power Ag Vorrichtungen und Verfahren zum Ermitteln einer Elementzusammensetzung eines Materials

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3549263A (en) * 1968-01-24 1970-12-22 Tokyo Shibaura Electric Co Apparatus for detecting foreign matters mixed with powdered or granular materials
GB1479783A (en) * 1974-12-16 1977-07-13 Pye Ltd Chemical analysis apparatus
ZA765149B (en) * 1976-08-27 1978-04-26 De Beers Ind Diamond Measurement of optical properties
US4422760A (en) * 1981-02-20 1983-12-27 Pacific Scientific Instruments Company Optical analyzing instrument having vibrating trough
US4530431A (en) * 1982-12-06 1985-07-23 Syn-Energy, Inc. Center flow feeder and vibratory conveyor
SE454387B (sv) * 1983-07-04 1988-04-25 Peter Perten Anordning vid en infrarodanalysator for relativ mengdbestemning av ett visst eller vissa emnen i ett pulverformigt material
US4742228A (en) * 1984-04-19 1988-05-03 Gebruder Buhler Ag Infrared measuring apparatus and process for the continuous quantitative determination of individual components of flour or other groundable food products
DD235918A1 (de) * 1985-04-01 1986-05-21 Wtz Holzverarbeitende Ind Anordnung zur kontinuierlichen feuchtemessung von holzpartikeln
US4883963A (en) * 1986-04-28 1989-11-28 Bran+Luebbe Gmbh Optical analysis method and apparatus having programmable rapid random wavelength access
JPH0795014B2 (ja) * 1988-07-29 1995-10-11 カワサキ機工株式会社 加工茶葉のサンプリング装置
GB8920056D0 (en) * 1989-09-05 1989-10-18 Prisecter Sampling Plc Apparatus and method for monitoring particulate material
DK170899B1 (da) * 1994-03-11 1996-03-04 Tecator Ab Prøvebeholder til brug ved analyse af en heri anbragt materialeprøve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9819149A1 *

Also Published As

Publication number Publication date
WO1998019149A1 (fr) 1998-05-07
JP2000503400A (ja) 2000-03-21
DE19644871A1 (de) 1998-05-07

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