DE102010001645A1 - Volumetric flow meter e.g. thermal volumetric flow meter, for plant of industrial process technique to measure e.g. mass flow rate of raw materials, has data processing unit producing signal based on determined flow rate of medium component - Google Patents

Volumetric flow meter e.g. thermal volumetric flow meter, for plant of industrial process technique to measure e.g. mass flow rate of raw materials, has data processing unit producing signal based on determined flow rate of medium component Download PDF

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Publication number
DE102010001645A1
DE102010001645A1 DE201010001645 DE102010001645A DE102010001645A1 DE 102010001645 A1 DE102010001645 A1 DE 102010001645A1 DE 201010001645 DE201010001645 DE 201010001645 DE 102010001645 A DE102010001645 A DE 102010001645A DE 102010001645 A1 DE102010001645 A1 DE 102010001645A1
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Germany
Prior art keywords
measuring
medium
flow rate
component
mass flow
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Pending
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DE201010001645
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German (de)
Inventor
Oliver 79713 Seifert
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Endress and Hauser Flowtec AG
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Endress and Hauser Flowtec AG
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Priority to DE201010001645 priority Critical patent/DE102010001645A1/en
Publication of DE102010001645A1 publication Critical patent/DE102010001645A1/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
    • G01F1/74Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid

Abstract

Method, measuring system and flow meter of the process measuring technology, which has at least one sensor for detecting at least first measured values of the flow of a first measuring medium through a first measuring tube, which flow meter has a data processing unit, suitable for calculating the mass flow rate of at least a first component of a second medium according to a predetermined Functional specification from the first measured values and at least second measured values of at least one process variable and which data processing unit is suitable for generating a signal dependent on the determined mass flow rate of the first component of the second medium.

Description

  • The present invention relates to a flowmeter of the process measuring technology for determining the mass flow rate of at least one component of a second multi-component measuring medium z. Example, by a pipeline, which has at least one sensor for detecting at least first measurements of the flow of a first medium through a measuring tube and which flow meter has a data processing unit, a measuring system with the flowmeter according to the invention as a component and a method for determining the mass flow rate of at least one Component of a second medium through the pipeline by means of a flow meter according to the invention.
  • Flow meters of process automation technology, such. B. Magnetic-inductive flowmeters, Coriolis flowmeters, thermal flowmeters Ultrasonic flowmeters or flowmeters by means of differential pressure measurement or vortex principle are known from the prior art exhaustively the expert. These measure the volume and / or mass flow of a medium through a measuring tube. Maybe these other parameters of the medium to be measured, such. B. its temperature or density, provide.
  • Some regulations, laws, guidelines and standards require emissions to be determined and disclosed. The Kyoto Protocol, for example, stipulates that certain industrial companies must, among other things, record the carbon dioxide emissions of their combustion processes. At the time of the patent application, the EU applies Directive 2007/589 / EC for the measurement of emissions, in Germany z. For example, the allocation ordinance ZuV 2012.
  • The object of the invention is to provide a measuring system with which emissions can be directly calculated and output.
  • The object is achieved by the subject matter of claim 1 and the further independent claims 7, 8 and 10.
  • Further developments and refinements of the inventions can be found in the features of the respective dependent claims.
  • The invention allows numerous embodiments. Some of them will be briefly explained here with reference to the following figures. Identical elements are provided in the figures with the same reference numerals.
  • 1 schematically shows a measuring system with a first flow meter according to the invention 1 the process measuring technology, which at least one sensor for detecting at least first measured values of the flow of a first measuring medium 4 by a first measuring tube, which first flow meter 1 a data processing unit, suitable for calculating the mass flow rate of at least a first component of a second medium 5 according to a predetermined functional specification of the first measured values and at least second measured values of at least one further process variable and which data processing unit is suitable, one of the determined mass flow rate of the first component of the second medium 5 generate dependent signal. The volume conversion is preferably the mass conversion. However, the mass flow rate can also be described by the standard volume throughput or the standard volume throughput, for example. In the following, only the mass conversion is discussed in more detail, which should not exclude other types of mass throughput. The second medium 5 consists in particular of at least two components. It flows, for example, through a second measuring tube, for example a chimney, whereby the mass flow rate could be referred to as the mass flow through the second measuring tube. Will be second readings from the second medium 5 in the second measuring tube from a second measuring device 3 , in particular a measuring device for determining an emission factor and / or an oxidation factor and / or a calorific value, the second medium could also be referred to as a second measuring medium. In addition to the flow of the first medium 4 through the first measuring tube are to be determined as at least one further process variable. Further process variables are, for example, emission factors and / or oxidation factors and / or calorific values of the first measurement medium 4 , Emission factors and / or oxidation factors can be determined both by the process, for example the type and technique of combustion, and by the chemical composition of the first measuring medium 4 depend.
  • In general, a measuring medium may be a pure substance or a mixture of at least two different chemical elements or chemical compounds. The various pure substances of a mixture are the components. These may be present in a heterogeneous mixture in separate phases and mixed in a homogeneous mixture at the molecular level and thus be single-phase. For the second medium 5 For example, it may be a physically and / or chemically modified first measurement medium 4 act. After combustion, the second medium 5 rather, a physical and / or chemical modified mixture of the first medium 4 and a third medium 6 , Is a hydrocarbon as the first measuring medium 4 in a burner 2 combusted under air atmosphere, among other things carbon dioxide is formed as a component of the second medium 5 from the carbon of the first medium 4 and the oxygen from the air as the third medium 6 ,
  • Use find measuring systems according to the invention z. B. in a plant of industrial process technology. There is a first flow meter according to the invention 1 an issuer 2 of the second medium 5 procedurally upstream, the first measuring medium 4 the issuer 2 for process engineering processing is supplied and wherein the second medium 5 the issue of the issuer 2 is. An incineration plant is, for example, such a plant of industrial process technology. The issuer 2 then is the burner and the first flow meter 1 is located between the tank and the burner and measures the flow of fuel as the first measuring medium 4 , The exhaust gases of the burner can z. B. be derived by a chimney. They form the second medium 5 , When the amount of carbon dioxide expelled through the burner is determined, the mass flow rate of carbon dioxide from the first flowmeter becomes equal 1 determined.
  • Not shown are the individual components of the first flowmeter 1 , Its data processing unit is suitable, for example, for the first measured values and / or the second measured values and / or the determined mass throughputs of at least the first component of the second medium 5 to save over a given period of time. Furthermore, the data processing unit may be suitable for integrating the first measured values and / or the second measured values and / or the determined mass throughputs of at least the first component of the second medium 5 over the given period. Also, the first flow meter according to the invention 1 an output unit which is suitable for outputting an alarm if it exceeds and / or falls below a predetermined threshold value of the mass flow rate of the first component of the second medium 5 or upon exceeding and / or falling below a predetermined threshold value of the time variation of the mass flow rate of the first component of the second medium 5 , In addition, an alarm may also be issued if the threshold value of the mass mass determined over the predetermined time period is exceeded and / or undershot.
  • In one embodiment of the invention, the data processing unit is suitable for storing the first measured values over a predetermined period of time, that is to say a predetermined time interval. Likewise, the data processing unit may be adapted to store the first and / or the second measured values and / or the determined mass throughputs of at least the first component of the second medium over a predetermined period of time. In addition, in one embodiment, the data processing unit of the first flowmeter according to the invention is suitable for integrating or, in the discrete case, summing the first and / or second measured values and / or the determined mass throughputs of at least the first component of the second medium over the predetermined period of time. As a result, the entire mass flow rate of at least the first component of the medium to be measured, for. B. by the second measuring tube, in the given period calculate. Even in the period changing concentrations can thus be taken into account by z. B. an alarm via an output unit is outputable when the concentration and / or the mass fraction of the first component in the measuring medium change over time, in particular when exceeding and / or falling below a predetermined threshold value of the mass flow rate, as described above.
  • Furthermore, a first flow measuring device according to the invention 1 Have at least one receiving unit, which receiving unit is suitable for detecting second measured values of the further process variable or the other process variables. This receiving unit can be designed so that the second measured values can be entered manually or they are then transferred online to the first flowmeter.
  • In another example, a first flow meter according to the invention 1 a control unit, suitable for controlling an emitter 2 of the second medium 5 , Based on the determined mass flow rate of the first component of the second medium 5 , Then z. B. flow meter 1 and issuer 2 be connected via a data line, which is not shown here for clarity.
  • Shown here is merely that the first flow meter 1 and the second meter 3 communicate with each other via a bus system, in particular via HART, Foundation Fieldbus or Profibus. Alternatively, a 4 ... 20 mA connection or frequency output or pulse output connection is provided between the meters. In addition to the manual entry of the second measured values, the calculation can be at least of the mass flow rate of the first component of the second medium 5 z. B. also with fixed and in the flowmeter 1 stored second measured values.
  • An inventive measuring system has just a first, inventive flow meter 1 the process measuring technology for detecting at least a first measured value of a flow of a first measuring medium 4 by a first measuring tube and at least one further, second measuring device 3 for detecting at least one second measured value of at least one further process variable, wherein the first flowmeter 1 and the second meter 3 communicate with each other, wherein at least the second measured value from the second measuring device 3 to the first flowmeter 1 is communicable, wherein the first flow meter 1 a data processing unit to a mass flow rate of a first component of a second medium 5 , in particular a mass flow rate of at least a first component of a second measuring medium 5 by a second measuring tube, to determine the first measured value and the second measured value or the first measured values and the second measured values according to a predetermined functional specification and to generate a signal dependent on the determined mass flow rate of the first component of the second medium.
  • An inventive method for determining a mass flow rate of at least a first component of a second measuring medium 5 , z. B. by a second measuring tube, comprises the following steps. By means of a first flowmeter 1 becomes at least a first measured value of a flow of a first measuring medium 4 determined by a first measuring tube, wherein based on this first measured value and based on at least one further, second measured value of at least one further process variable, the mass flow rate of the first component of the second medium 5 , For example, the emission of the issuer through the second measuring tube, from the first flow meter 1 determined, z. B. calculated according to a predetermined function rule is. This mass flow rate can then be displayed or output, for example by an alarm and / or a control signal to the issuer, especially when a predetermined threshold or its time change is exceeded or undershot. In particular, the second medium is 5 around the first measuring medium 4 after a chemical reaction, especially a combustion. The second reading is from the second meter 3 to the first flowmeter 1 transfer. This is, for example, an emission factor and / or an oxidation factor and / or a calorific value of a fuel consumed by an issuer. The second measured value can be continuously measured and transmitted by the second measuring device.
  • From a measured volume flow, z. B. the standard volume flow or standard volume flow, and / or mass flow of the first medium 4 The mass flow rate of the first component, for example carbon dioxide, of the second medium is determined according to the invention by the first measuring tube as the first measured value and from an emission factor and / or an oxidation factor and / or a calorific value as the second measured value 5 calculated by the first flowmeter.
  • The emission factor is referred to as the ratio of the mass of the emitted second medium to the mass of a first measurement medium used. The emission factor is substance- and process-specific, d. H. it depends on the starting material, ie the first measuring medium, the process, eg. As the combustion, and the emitted material. If a longer process is considered, the temporal component must also be included.
  • The calorific value is a measure of the specific thermal energy contained in a substance per unit of measurement. The calorific value in Germany is considered to be identical to the standard combustion enthalpy of general thermodynamics. Here is referenced to a combustion temperature of 25 ° C. In France and Japan, however, a combustion temperature of 0 ° C is referenced, in some English-speaking countries at 15 ° C and in the USA at 60 ° F.
  • The calorific value depends on the maximum amount of heat that can be used during combustion, which does not result in condensation of the water vapor contained in the exhaust gas, based on the amount of fuel used.
  • The oxidation factor, which accounts for the incompleteness of combustion processes, is expressed as a fraction of one.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited non-patent literature
    • Directive 2007/589 / EC [0003]

Claims (12)

  1. Flowmeter of process measurement, which has at least one sensor for detecting at least first measured values of the flow of a first medium through a first measuring tube, which flow meter has a data processing unit, suitable for calculating the mass flow rate, in particular the mass flow rate, at least a first component of a second medium after a predetermined function specification from the first measured values and at least second measured values of at least one process variable and which data processing unit is suitable for generating a signal dependent on the ascertained mass flow rate of the first component of the second medium.
  2. Flowmeter according to claim 1, characterized in that the data processing unit is suitable for storing the first measured values and / or the second measured values and / or the determined mass flow rates of at least the first component of the second medium over a predetermined period.
  3. Flowmeter according to claim 1 or 2, characterized in that the data processing unit is suitable for integrating the first measured values and / or the second measured values and / or the determined mass flow rates of at least the first component of the second medium over the predetermined period.
  4. Flowmeter according to one of claims 1 to 3, characterized in that it comprises an output unit, suitable to issue an alarm when exceeding and / or falling below a predetermined threshold value of the mass flow rate of the first component of the second medium and / or exceeded and / or undershooting a predetermined threshold value of the mass of at least the first component of the measuring medium calculated by the integration over the predetermined period of time.
  5. Flowmeter according to one of claims 1 to 4, characterized in that the flowmeter has at least one receiving unit, which receiving unit is suitable for detecting second measured values of the process variable.
  6. Flowmeter according to one of claims 1 to 5, characterized in that it comprises a control unit, suitable for controlling an emitter of the measured medium, based on the determined mass flow rate of the first component of the second medium or on the basis of the integration over the predetermined period calculated mass at least the first component of the measuring medium.
  7. Use of a measuring device according to one of claims 1 to 6, characterized in that it is upstream of an issuer of the second medium process technology in a plant of industrial process technology, wherein the first measuring medium is supplied to the issuer for process engineering processing and wherein the second medium, the emission of the Issuer is.
  8. Method for determining a mass flow rate of at least one first component of a second medium, wherein at least a first measured value of a flow of a first measuring medium is determined by a first measuring tube by means of a flow measuring device, wherein based on this first measured value and based on at least one second measured value of at least one process variable, the mass flow rate first component of the second medium is determined by the flowmeter.
  9. A method according to claim 7, characterized in that from a measured volume and / or mass flow of the first measuring medium through the first measuring tube as a first measured value and an emission factor and / or an oxidation factor and / or a calorific value as a second measured value of the mass flow rate of the first component of the second medium is calculated.
  10. Measuring system having a first flow measuring device of the process measuring technology for detecting at least a first measured value of a flow of a first measuring medium through a first measuring tube and at least a second measuring device for detecting at least a second measured value of at least one process variable, wherein the first and the second measuring device communicate with each other at least the second measured value can be transmitted from the second measuring device to the first flow measuring device, wherein the first flow measuring device has a data processing unit in order to determine a mass flow, in particular a mass flow rate, of at least a first component of a second medium according to a predetermined functional specification from the first measured value and the second measured value and to generate a dependent of the determined mass flow rate of the first component of the second medium signal.
  11. Measuring system according to claim 10, characterized in that the first measuring device is a flow meter and that the second measuring device is a measuring device for determining an emission factor and / or an oxidation factor and / or a calorific value.
  12. Measuring system according to claim 10 or 11, characterized in that the first and the second measuring device communicate with each other via a bus system.
DE201010001645 2010-02-05 2010-02-05 Volumetric flow meter e.g. thermal volumetric flow meter, for plant of industrial process technique to measure e.g. mass flow rate of raw materials, has data processing unit producing signal based on determined flow rate of medium component Pending DE102010001645A1 (en)

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DE201010001645 DE102010001645A1 (en) 2010-02-05 2010-02-05 Volumetric flow meter e.g. thermal volumetric flow meter, for plant of industrial process technique to measure e.g. mass flow rate of raw materials, has data processing unit producing signal based on determined flow rate of medium component

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DE201010001645 DE102010001645A1 (en) 2010-02-05 2010-02-05 Volumetric flow meter e.g. thermal volumetric flow meter, for plant of industrial process technique to measure e.g. mass flow rate of raw materials, has data processing unit producing signal based on determined flow rate of medium component

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9102208U1 (en) * 1991-02-25 1992-03-26 Siemens Ag, 8000 Muenchen, De
US20020108451A1 (en) * 2000-12-27 2002-08-15 May David F. Gaseous mass flow measurement device
US20060069494A1 (en) * 2004-09-30 2006-03-30 Hitachi Ltd. Method for obtaining exhaust gas flow quantity, exhaust gas flow measurement apparatus, and exhaust gas recirculation control system
DE69734664T2 (en) * 1996-09-27 2006-08-10 Hino Jidosha Kogyo K.K., Hino Gas meter
DE602004004709D1 (en) * 2003-08-18 2007-03-29 Horiba Ltd Method and device for measuring the exhaust gas flow

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9102208U1 (en) * 1991-02-25 1992-03-26 Siemens Ag, 8000 Muenchen, De
DE69734664T2 (en) * 1996-09-27 2006-08-10 Hino Jidosha Kogyo K.K., Hino Gas meter
US20020108451A1 (en) * 2000-12-27 2002-08-15 May David F. Gaseous mass flow measurement device
DE602004004709D1 (en) * 2003-08-18 2007-03-29 Horiba Ltd Method and device for measuring the exhaust gas flow
US20060069494A1 (en) * 2004-09-30 2006-03-30 Hitachi Ltd. Method for obtaining exhaust gas flow quantity, exhaust gas flow measurement apparatus, and exhaust gas recirculation control system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Richtlinie 2007/589/EG

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