DE3039210A1 - Digital display of filling height in fluidised bed - reactor using signals derived from two pressure difference meters - Google Patents

Digital display of filling height in fluidised bed - reactor using signals derived from two pressure difference meters

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Publication number
DE3039210A1
DE3039210A1 DE19803039210 DE3039210A DE3039210A1 DE 3039210 A1 DE3039210 A1 DE 3039210A1 DE 19803039210 DE19803039210 DE 19803039210 DE 3039210 A DE3039210 A DE 3039210A DE 3039210 A1 DE3039210 A1 DE 3039210A1
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Germany
Prior art keywords
fluidized bed
pressure difference
pressure
bulk density
bed
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Granted
Application number
DE19803039210
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German (de)
Other versions
DE3039210C2 (en
Inventor
Eckhard 5030 Hürth Marretsch
Günter Dipl.-Phys. 5042 Erftstadt Oesterle
Hans-Werner 5354 Weilerswist Valentin
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Vinnolit Monomer GmbH and Co KG
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Hoechst AG
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Priority to DE19803039210 priority Critical patent/DE3039210C2/en
Publication of DE3039210A1 publication Critical patent/DE3039210A1/en
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Publication of DE3039210C2 publication Critical patent/DE3039210C2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1809—Controlling processes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00026—Controlling or regulating the heat exchange system
    • B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
    • B01J2208/0007—Pressure measurement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00026—Controlling or regulating the heat exchange system
    • B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
    • B01J2208/00079—Fluid level measurement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/0061—Controlling the level

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

The filling ht. of the fluidised bed in a reactor is continuously presented on a display screen by appts. based on two pressure difference meters. One meter has both measuring pipes within the bed at a specified vertical distance apart, while the second meter has one pipe near the bed base and the other above the bed. Both pressure differences are converted to electrical analog signals. In a first stage in a following calculator the first meter signal is used to determine the apparent bed density, which in a second stage is used in conjunction with the second meter signal to calculate the filling height. The meters may be pneumatically or electrically operating pressure difference transmitters whose outputs are converted into electrical signals electro-pneumatically or by a digital voltmeter respectively. The bed density may also be displayed. Used for continuously monitoring conditions in a catalytic reactor to avoid collapse of bed at low pressure or expulsion of reactor granules at high pressure. The method is simple and uses known components.

Description

a) die Apordnung als Druskdifferenz-Meßgerät pneu@ a) the arrangement as a drusk difference measuring device pneu @

HOECHST AKTIENGESELLSCHAFT HOE 80/H 030 matisch arbeitende Druckdifferenz-Transmitter aufweist; b) die preumatischen Ausgang@signele der pneumatisch 5 Digitale Anzeige der Füllhohe von arbeitenden Druckdiffenenz-Transmitter durch elek-Wirbelschichtreaktoren tro-pneumatische Umsetzer in analoge elektrische Signale umgewandelt werden; 10 Die vorliegende Erfindung betrifft eig Verfahren zur digitalen Anzeige der Füllhöhe von Wirbelschichtreaktoren, welches in einer Anordnung durchgeführt wird, d) die aus einem ersten Druckdifferenz-Meßgeräts dessen Meßronre in der Wirbelschichtzone angeordnet sind, und 15 einem zweiten Druckdifferenz-Meßgerät besteht, dessen unteres Meßrohr unten in der Wirbelschichtzone und dessen oberes Meßrohr oberhalb der Wirbelschichtzone angee) die von Pochner ermitteite Schüttdichte und die ordnet ist.HOECHST AKTIENGESELLSCHAFT HOE 80 / H 030 automatically operating differential pressure transmitters having; b) the preumatic output @ signals of the pneumatic 5 digital display the filling level of working pressure difference transmitters through elek fluidized bed reactors tro-pneumatic converters are converted into analog electrical signals; 10 The present invention relates to a method for digitally displaying the fill level of fluidized bed reactors, which is carried out in an arrangement, d) the from a first differential pressure measuring device its measuring device in the fluidized bed zone are arranged, and 15 is a second differential pressure measuring device, the lower Measuring tube below in the fluidized bed zone and its upper measuring tube above the fluidized bed zone angee) the bulk density determined by Pochner and which is ordered.

Füllhöhe der Wirbelschichtzone digital angezeigt werden. Level of the fluidized bed zone can be displayed digitally.

20 Beim Betrieb von Wirbelschichtreaktoren ist die Kenntnis der Schtlttdichte und der Füllhöhe der Wirbelschicht-1) zone von besonderer Bedeutung für die Leitung bzw. die Umsetzungsgeschwindigkeit. Bei Unkenntis dieser Werte kann es passieren, daß mit dem zugeführten Gas. körniger 25 Katalysator aus dem Reaktor ausgeblasen wird oder die Wirbelschichtzone zusammenfällt. Es ist deshalb beim Betrieb von Wirbelschichtreaktoren erforderlich, daß die Schüttdichte und die Füllhöhe der Wirbelschichtzone jederzeit kontrollierbar bleibt.20 When operating fluidized bed reactors, knowledge of the bulk density and the level of the fluidized bed zone 1) of particular importance for the line or the speed of implementation. If these values are not known, it can happen that with the supplied gas. Granular catalyst was blown out of the reactor or the fluidized bed zone collapses. It is therefore used in the operation of fluidized bed reactors required that the bulk density and the fill level of the fluidized bed zone at all times remains controllable.

Beim Verfahren gemäß der Erfindung entfallen individuelle 30 Es ist bekannt, die Dichte einer der Schwerkraft unterworfenen Flüssigkeit durch Messung der Differenz derhydrostatischen Drücke in zwei definienten unterschiedlichen Tiefen der Flüssigkeit zu bestimmen (vergl. HENG-35 STENBERG, STUREM, WINKLER: "Messen, Steuern und Regeln in der Chemischen Technik", Band II, Betriebsmeßtechnik II, - -1980, Seiten 142 bis 144>.In the method according to the invention, individual es are omitted known, the density of a liquid subjected to gravity by measurement the difference in the hydrostatic pressures at two defined different depths to determine the liquid (see HENG-35 STENBERG, STUREM, WINKLER: "Measure, Control and regulation in chemical engineering ", Volume II, Industrial measurement technology II, - -1980, pages 142 to 144>.

Weiterhin ist es bekannt, die Füllhöhe von Flüssigkeiten in Behältern mit Hilfe von hydrostatischen Meßverfahren zu ermitteln (vergl. u. a. HENGSTENBERG, STURM, WINKLER: "Messen, Steuern und Regeln in der Chemischen Technik, Band 1, Betriebsmeßtechnik I, 1980, Seiten 602 bis 608).It is also known to determine the level of liquids in containers to be determined with the help of hydrostatic measuring methods (see also HENGSTENBERG, STURM, WINKLER: "Measuring, controlling and regulating in chemical technology, Volume 1, industrial measurement technology I, 1980, pages 602 to 608).

Es ist Aufgabe der vorliegenden Erfindung, ein Verfahren zur Anzeige der Füllhöhe in Wirbelschichtreaktoren anzugeben, bei welchem die Kontrolle von Schüttdichte und Füllhöhe des körnigen Katalysators in der Wirbelschichtzone durch beispielsweise in einem Bedienungsstand direkt ablesbare Werte ständig möglich ist. Das wird erfindungsgemäß dadurch erreicht, daß die Meßwerte der Druckdifferenzen zu je einem elektrischen Analogsignal verarbeitet und die elektrischen Analogsignale einem Rechner zugeführt werden, wobei in dem Rechner in einem ersten Schritt aus dem elektrischen Analogsignal der ersten Druckdifferenzmessung die Schüttdichte der Wirbelschicht nach der Gleichung Druckdifferenz 1 1 Abstand = Abstand der Meßrohre . Erdbeschleunigung bestimmt wird und in einem zweiten Schritt aus der.It is the object of the present invention to provide a method for display indicate the filling level in fluidized bed reactors at which the control of Bulk density and filling height of the granular catalyst in the fluidized bed zone For example, values that can be read directly from a control station are always possible. This is achieved according to the invention in that the measured values of the pressure differences each processed into an electrical analog signal and the electrical analog signals be fed to a computer, the first step being in the computer the electrical analog signal of the first pressure difference measurement, the bulk density the fluidized bed according to the equation pressure difference 1 1 distance = distance between the measuring tubes . Gravitational acceleration is determined and in a second step from the.

Schüttdichte und dem elektrischen Analogsignal der zweiten Druckdifferenzmessung die Füllhöhe der Wirbelschichtzone nach der Gleichung = .. Druckdifferenz 2 1 Füllhöhe = Schüttdichte . Erdbeschleunigung errechnet wird, und die so ermittelte Schüttdichte und Füllhöhe auf einem Anzeigegerät sichtbar gemacbtwerden.Bulk density and the electrical analog signal of the second pressure difference measurement the filling level of the fluidized bed zone according to the equation = .. pressure difference 2 1 filling level = Bulk density. Gravitational acceleration is calculated, and the bulk density determined in this way and fill level can be visibly macbted on a display device.

Das Verfahren gemäB der Erfindung kann weiterhin wahlweise dadurch ausgestaltet sein, daß a) die Anordnung als Druckdifferenz-Meßgerät pneumatisch arbeitende Druckdifferenz-Transmitter aufweist; b) die pneumatischen Ausgangssignale der pneumatisch arbeitenden Druckdifferenz-Transmitter durch elektro-pneumatische Umsetzer in analoge elektrische Signale umgewandelt werden; c) die Anordnung als Druckdifferenz-Meßgerät elektrisch arbeitende Druckdifferenz-Transmitter aufweist; d) jeweils das elektrische Analogsignal mittels eines Digital^oltmeters zu elektrischen Impulsen verarbeitet wird, die ihrerseits der Rechner zugeführt werden; e) die vom Rechner ennittelte Schüttdichte und die Füllhöhe der Wirbelschichtzone digital angezeigt werden; f) das Verfahren durchgeführt wird mit einer Anordnung, bei der die beiden Druckdifferenz-Meßgeräte an einem Stutzen gemeinsam angeschlossen sind.The method according to the invention can furthermore optionally thereby be designed that a) the arrangement as a pressure differential measuring device has pneumatically operating differential pressure transmitters; b) the pneumatic Output signals of the pneumatically operating differential pressure transmitters by means of electro-pneumatic ones Converters are converted into analog electrical signals; c) the order as Differential pressure measuring device has electrically operating differential pressure transmitters; d) in each case the electrical analog signal to electrical by means of a digital oltmeter Pulses are processed, which in turn are fed to the computer; e) from Computer averaged bulk density and the filling level of the fluidized bed zone digitally displayed will; f) the procedure is carried out with an arrangement in which the two Differential pressure gauges are jointly connected to a nozzle.

Das erfindungsgemäBe Verfahren zeichnet sich durch Einfachheit und kostengünstige Anwendung bekannter Bauelemente aus.The inventive method is characterized by simplicity and inexpensive application of known components.

Beim Verfahren gemäß der Erfindung entfallen individuelle Ablesefehler bei der Feststellung der Meßwerte der Druckdifferenzen. Vielmehr werden bei diesem Verfahren die ermittelten Meßwerte mit hoher Auflösung direkt weiterverarbeitet.In the method according to the invention, there are no individual reading errors when determining the measured values of the pressure differences. Rather, be at this Method directly processes the determined measured values with high resolution.

Beim erfindungsgemäßen Verfahren stehen die für den Betrieb eines Wirbelschichtreaktors besonders wichtigen Werte "Füllhöhe" und "Schüttdichte" als kontinuierliche Anzeige jederzeit zur Verfügung.In the method according to the invention, the stand for the operation of a Fluidized bed reactor particularly important values "filling height" and "bulk density" as continuous display available at any time.

In der beigefügten Zeichnung ist eine Anordnung zur Durchführung des erfindungsgemäßen Verfahrens schematisch dargestellt.-Ein Reaktor 2 enthält eine Wirbelschichtzone 1, in welcher sich fluidisierter körniger Katalysator befindet.In the accompanying drawing is an arrangement for performing the Process according to the invention shown schematically.-A reactor 2 contains a Fluidized bed zone 1, in which there is fluidized granular catalyst.

Am Reaktor 2 sind mehrere Meßrohre (3, 4, 6, 7) von Druckdifferenz-Meßgeräten (5, 8) angeordnet, welche mit Spülgas aus einer Druckgasleitung 9 beaufschlagt werden. Die von dem ersten Druckdifferenz-Meßgerät 5 ermittelten pneumatischen Meßgrößen werden in den elektro-pneumatischen Umsetzer 10 übergeben, dessen elektrischer Ausgangswert in einem Digitalvoltmeter 11 in elektrische Impulse umgewandelt wird. Aus diesen elektrischen Impulsen wird in einem Rechner 14 die Schüttdichte berechnet, gespeichert und in einem Anzeigegerät 15 digital sichtbar gemacht.At the reactor 2 there are several measuring tubes (3, 4, 6, 7) of differential pressure measuring devices (5, 8) are arranged, which are acted upon with flushing gas from a compressed gas line 9. The pneumatic measured variables determined by the first pressure difference measuring device 5 are transferred to the electro-pneumatic converter 10, its electrical output value is converted into electrical impulses in a digital voltmeter 11. From these electrical impulses, the bulk density is calculated in a computer 14, stored and made digitally visible in a display device 15.

Die von dem zweiten Druckdifferenz-Meßgerät 8 ermittelten pneumatischen Meßgrößen werden in den elektro-pneumatischen Umsetzer 12 übergeben, dessen elektrischer Ausgangswert in einem Digitalvoltmeter 13 in elektrische Impulse umgewandelt wird. Aus diesen elektrischen Impulsen und dem gespeicherten Wert der Schüttdichte wird im Rechner 14 die Füllhöhe berechnet und in dem Anzeigegerät 16 digital sichtbar gemacht.The determined by the second pressure difference measuring device 8 pneumatic Measured variables are transferred to the electro-pneumatic converter 12, its electrical Output value is converted into electrical pulses in a digital voltmeter 13. From these electrical impulses and the stored value, the bulk density becomes the filling level is calculated in the computer 14 and is digitally visible in the display device 16 made.

Claims (7)

Digitale Anzeige der Füllhöhe von Wirbelschichtreaktoren Patentansprüche Verfahren zur digitalen Anzeige der Füllhöhe von Wirbelschichtreaktoren, durchgeführt in einer Anordnung, bestehend aus einem ersten Druckdifferenz-Meßgerät, dessen Meßrohre in der T;Wirbelschichttone angeordnet sind, und einem zweiten Druckdifferenz-Meßgerät, dessen unteres Meßrohr unten in der Wirbelschichtzone und dessen oberes Meßrohr oberhalb der Wirbelschichtzone angeordnet ist, dadurch zekennzeichnet, daß die Meßwerte der Druckdifferenzen zu je einem elektrischen Analogsignal verarbeitet und die elektrischen Analogsignale einem Rechner zugeführt werden, wobei in dem Rechner in einem ersten Schritt aus dem elektrischen Analogsignal der ersten Druckdifferenzmessung die Schüttdichte der Wirbelschicht nach der Gleichung Druckdifferenz 1 1 Schüttdichte = # Abstand der Meßrohre bestimmt wird und in einem zweiten Schritt aus der Schüttdichte und dem elektrischen Analogsignal der zweiten Druckdifferenzmessung die Füllhöhe der Wirbelschichtzone nach der Gleichung Füllhöhe = Druckdifferenz 2 . 1 Schüttdichte Erdbeschleunigung errechnet wird, und die so ermittelte Schüttdichte und die Füllhöhe auf einem Anzeigegerät sichtbar gemacht werden. Digital display of the fill level of fluidized bed reactors Process for the digital display of the fill level of fluidized bed reactors in an arrangement consisting of a first differential pressure measuring device, its measuring tubes in which T; fluidized bed clays are arranged, and a second pressure differential measuring device, its lower measuring tube down in the fluidized bed zone and its upper measuring tube is arranged above the fluidized bed zone, characterized in that the measured values the pressure differences are processed into an electrical analog signal each and the electrical Analog signals are fed to a computer, wherein in the computer in a first Step from the electrical analog signal of the first pressure difference measurement the bulk density the fluidized bed according to the equation pressure difference 1 1 bulk density = # distance the measuring tube is determined and in a second step from the bulk density and the electrical analog signal of the second pressure difference measurement the level of the Fluidized bed zone according to the equation Filling level = pressure difference 2 . 1 bulk density acceleration due to gravity is calculated, and the bulk density thus determined and the filling level can be made visible on a display device. 2) Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Anordnung als Druckdifferenz-Meßgeräte pneumatisch arbeitende Druckdifferenz-Transmitter aufweist.2) Method according to claim 1, characterized in that the arrangement has as differential pressure measuring devices pneumatically operating differential pressure transmitters. 3) Verfahren nach Anspruch 1 oder 2, dadurch gekenn zeichnet, daß die pneumatischen Ausgangssignale der pneumatisch arbeitenden Druckdifferenz-Transmitter durch elektro-pneumatische Umsetzer in analoge elektrische Signale umgewanaelt werden.3) Method according to claim 1 or 2, characterized in that the pneumatic output signals of the pneumatically operating differential pressure transmitter can be converted into analog electrical signals by electro-pneumatic converters. 4) Verfahren nach Anspruch 1, dadurch gekennzeichnet.4) Method according to claim 1, characterized. daß die Anordnung als Druckdifferenz-Meßgeräte elektrisch arbeitende DruckdiIferenz-Transmitter aufweist. that the arrangement as a differential pressure measuring devices working electrically Having pressure differential transmitter. 5) Verfahren nach einem der Anspruche 1 bis 4, dadurch gekennzeichnet, daß jeweils aas elektrische Analogsignal mittels eines Digitalvoltmeters zu elektrischen Impulsen verarbeitet wird, die ihrerseits dem Rechner zugeführt werden.5) Method according to one of claims 1 to 4, characterized in that that each aas electrical analog signal by means of a digital voltmeter to electrical Pulses is processed, which in turn are fed to the computer. 6) Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die vom Rechner ermittelte Schüttdichte und die Füllhöhe der Wirbelsehiohtzone digital angezeigt werden.6) Method according to one of claims 1 to 5, characterized in that that the bulk density determined by the computer and the fill level of the vertebral vision zone can be displayed digitally. 7) Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Verfahren mit einer Anordnung durchgeführt wird, bei der die beiden Druckdifferenz-Meßgeräte an einem Stutzen gemeinsam angeschlossen sind.7) Method according to one of claims 1 to 6, characterized in that that the method is carried out with an arrangement in which the two pressure difference measuring devices are jointly connected to one nozzle.
DE19803039210 1980-10-17 1980-10-17 Digital display of the bulk density and fill level of granular catalysts in a fluidized bed reactor Expired DE3039210C2 (en)

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EP0093801A2 (en) * 1982-05-11 1983-11-16 KRW Energy Systems Inc. Control of bed height in a fluidized bed gasification system
EP0112105A1 (en) * 1982-12-16 1984-06-27 The Babcock & Wilcox Company Fluidised bed level measurement
EP0145379A2 (en) * 1983-11-23 1985-06-19 Transitron Electronics Corp. Tank level measuring system
EP0183154A2 (en) * 1984-11-23 1986-06-04 BASF Aktiengesellschaft Method for the continuous measurement of the degree of filling fluidised-powder apparatuses
DE3525455A1 (en) * 1985-07-17 1987-01-29 Helmut Haiges Control device for fermenting temperature
EP0214801A1 (en) * 1985-08-22 1987-03-18 Parmade Instruments C.C. A method of monitoring the liquid contents of a container vessel, monitoring apparatus for use in such method, and an installation including such apparatus
DE3728042A1 (en) * 1987-08-22 1989-03-02 Bosch Gmbh Robert Filling-level indicator for closable containers
FR2678398A1 (en) * 1991-06-28 1992-12-31 Champagne Moet Chandon Process for delivering a specified quantity of particles in suspension in a fluid and apparatus for the execution of this process
DE19714168A1 (en) * 1997-04-07 1998-10-08 Rossendorf Forschzent Device for hydrostatic filling measurement in pressure container
EP1092958A1 (en) * 1999-10-14 2001-04-18 Wagner International Ag Method and device for measuring the quantity of powder or the change of the quantity of powder in a container
CN107782403A (en) * 2017-10-23 2018-03-09 福建龙净脱硫脱硝工程有限公司 A kind of apparatus for measuring charge level and material level measuring method

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RU2124702C1 (en) * 1995-07-10 1999-01-10 Чангмин Ко., Лтд. Process measuring level of water or liquid ( versions ) and bubbling level indicator
CN104089680B (en) * 2014-07-25 2018-01-12 赵云华 The measuring method and device of liquid level height

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DE2849066A1 (en) * 1978-11-11 1980-05-22 Vdo Schindling Vehicle fuel tank level indicator - uses low-pass filter to eliminate interference caused by vehicle movement mounted between tank transducer and indicators

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093801A3 (en) * 1982-05-11 1984-10-03 Westinghouse Electric Corporation Control of bed height in a fluidized bed gasification system
EP0093801A2 (en) * 1982-05-11 1983-11-16 KRW Energy Systems Inc. Control of bed height in a fluidized bed gasification system
EP0112105A1 (en) * 1982-12-16 1984-06-27 The Babcock & Wilcox Company Fluidised bed level measurement
EP0145379A3 (en) * 1983-11-23 1987-06-24 Transitron Electronics Corp. Tank level measuring system
EP0145379A2 (en) * 1983-11-23 1985-06-19 Transitron Electronics Corp. Tank level measuring system
EP0183154A2 (en) * 1984-11-23 1986-06-04 BASF Aktiengesellschaft Method for the continuous measurement of the degree of filling fluidised-powder apparatuses
EP0183154A3 (en) * 1984-11-23 1987-06-16 BASF Aktiengesellschaft Method for the continuous measurement of the degree of filling fluidised-powder apparatuses
DE3525455A1 (en) * 1985-07-17 1987-01-29 Helmut Haiges Control device for fermenting temperature
EP0214801A1 (en) * 1985-08-22 1987-03-18 Parmade Instruments C.C. A method of monitoring the liquid contents of a container vessel, monitoring apparatus for use in such method, and an installation including such apparatus
DE3728042A1 (en) * 1987-08-22 1989-03-02 Bosch Gmbh Robert Filling-level indicator for closable containers
FR2678398A1 (en) * 1991-06-28 1992-12-31 Champagne Moet Chandon Process for delivering a specified quantity of particles in suspension in a fluid and apparatus for the execution of this process
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US5323930A (en) * 1991-06-28 1994-06-28 Champagne Moet & Chandon Method of dispensing a determined amount of particles suspended in a fluid and device for carrying out this method
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