WO2019012034A1 - Dispositif et procédé de détermination de la concentration de particules dans un fluide - Google Patents

Dispositif et procédé de détermination de la concentration de particules dans un fluide Download PDF

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Publication number
WO2019012034A1
WO2019012034A1 PCT/EP2018/068922 EP2018068922W WO2019012034A1 WO 2019012034 A1 WO2019012034 A1 WO 2019012034A1 EP 2018068922 W EP2018068922 W EP 2018068922W WO 2019012034 A1 WO2019012034 A1 WO 2019012034A1
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WO
WIPO (PCT)
Prior art keywords
fluid
particles
magnetic separator
magnetic
weight
Prior art date
Application number
PCT/EP2018/068922
Other languages
German (de)
English (en)
Inventor
Martin Hubrich
Pavel IVASHECHKIN
Matthias KOZARISZCZUK
Original Assignee
Vdeh-Betriebsforschungsinstitut 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 Vdeh-Betriebsforschungsinstitut Gmbh filed Critical Vdeh-Betriebsforschungsinstitut Gmbh
Publication of WO2019012034A1 publication Critical patent/WO2019012034A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/005—Pretreatment specially adapted for magnetic separation
    • B03C1/01—Pretreatment specially adapted for magnetic separation by addition of magnetic adjuvants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0332—Component parts; Auxiliary operations characterised by the magnetic circuit using permanent magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B03C1/0335—Component parts; Auxiliary operations characterised by the magnetic circuit using coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/28—Magnetic plugs and dipsticks
    • B03C1/282—Magnetic plugs and dipsticks with associated accumulation indicator, e.g. Hall sensor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/28—Magnetic plugs and dipsticks
    • B03C1/286—Magnetic plugs and dipsticks disposed at the inner circumference of a recipient, e.g. magnetic drain bolt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/24—Details of magnetic or electrostatic separation for measuring or calculating parameters, efficiency, etc.
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N2015/0042—Investigating dispersion of solids
    • G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke

Definitions

  • the invention relates to an apparatus and a method for determining a concentration of particles in a fluid.
  • Particulate-containing fluids are known to be produced in production plants that produce a particle-laden exhaust gas stream or wastewater stream or the like.
  • a production plant is, for example, a blast furnace, a converter, a vacuum degassing (VDA) or vacuum oxygen decarburization (VOD), a waste incineration plant, a continuous casting plant, a rolling mill, emulsifying machine, a pickling line, etc.
  • VDA vacuum degassing
  • VOD vacuum oxygen decarburization
  • waste incineration plant a continuous casting plant
  • a rolling mill emulsifying machine
  • pickling line etc.
  • the said exhaust gas streams are typically cleaned, for example in a wet gas scrubbing, with the knowledge of the particle concentration being important for the cleaning and scrubbing water recycling as well as for the monitoring of the production process.
  • the checking of the particle concentration in the exhaust gas flow is particularly difficult when the temperature of the exhaust gas flow is high and consequently results in a high wear during the particle measurement. This is the case, for example, with particle-laden exhaust gas streams and with the discharge of dust or oxidized base material, such as iron or an alloying element, which arises during the blast furnace or converter process.
  • dust or oxidized base material such as iron or an alloying element
  • flocculants are used for particle separation in process water treatment and sludge dewatering. It is known that flocculants are added in the dewatering of thin sludge, but the dosage is based only on experience and the volume flow.
  • flocculant is generally metered in proportion to the volume flow in order to improve the separation of particles. In the absence of reliable particle measurement, there is therefore no need-based metering.
  • To monitor the particle concentration in gases are usually optical
  • Transmitted light and scattered light methods are known which use a light source to illuminate, for example, a gas sample or a gas line.
  • a light detector receives the light which, coming from the light source, a) reflects off the particles or b) is attenuated by the gas sample and the particles contained therein. On the basis of the detected a) reflection or b) attenuation, the
  • Particle concentration can be determined in the gas sample.
  • Transmitted light and scattered light methods which use a light source to illuminate, for example, a water sample.
  • a light detector receives the light coming from the light source a) reflected by the particles or b) attenuated by the water sample and the particles therein.
  • the particle concentration in the water sample can be determined.
  • the optimum measuring range is between 0, 1 g / L and 1, 5 g / L.
  • measuring methods which use the Coriolis effect to determine the particle concentration in liquid media.
  • oscillating sensors measure the density of the liquid medium from which the particle concentration can be derived. This method can be used from particle concentrations> 15 g / L and must be tested for the respective application.
  • the measuring methods described are very sensitive to deposits, for example of lime and contaminants, which occur in industrial gas washing waters, process waters and wastewaters. This leads to measured value corruption and high maintenance costs.
  • JP 59054943 A discloses a method for determining the amount of magnetic particles in a fluid.
  • a piezoelectric vibrating element is disposed in a tube through which a fluid containing magnetic particles can flow.
  • An electromagnet arranged in a sheath is provided outside the tube. With the electromagnet, the magnetic particles can be attracted to the surface of the piezoelectric vibrating element.
  • An excitation signal is provided for applying the electromagnet.
  • the natural vibration frequency of the piezoelectric vibrating element is stored. The natural vibration frequency is changed depending on the magnetic particles attracted to the surface of the piezoelectric vibrating element.
  • JP 59054943 A states that this makes it possible to avoid weight determination which is associated with difficulties. According to the technical teaching of JP 59054943 A is not only dispensed with a weight determination, but rather a weight determination can not be performed, since the oscillation frequency primarily by the attraction of the outside magnet and the magnetic and / or magnetizable particles present in the fluid is changed. The weight here plays a negligible role and is not determinable. JP 59054943 A requires that the dependence of the oscillation frequency for each type of magnetic particles must be determined.
  • WO 2007/018187 A1 discloses a piezoelectric vibrating element in a reaction vessel.
  • the piezoelectric vibrating element is disposed at a detecting portion.
  • a magnetic field generating material is disposed outside the reaction vessel. With the magnetic field generating material, a magnetic field can be generated on the piezoelectric vibrating element. Magnetic particles may be attracted to the surface of the piezoelectric vibrating element when the magnetic field acts on the piezoelectric vibrating element.
  • WO 2007/018187 A1 states that for detecting a concentration of the to be measured
  • the frequency of the piezoelectric vibrating element with and without acting on the piezoelectric vibrating element magnetic field is determined.
  • the oscillation frequency depends primarily on the attraction of the externally acting magnet and on the magnetic and / or magnetizable particles present in the fluid.
  • a weight is not determined and can not be determined, since the influence of the magnetic field from the outside counteracts such a determination.
  • the present invention is therefore based on the object at least partially overcome the above-mentioned disadvantages of the prior art, in particular both small and large particle concentrations can be determined.
  • the device according to main claim 1 and the method according to claim 5 are used in the technical fields mentioned in the introduction, in particular in production plants which produce a particle-laden waste gas stream or waste water stream, such as a blast furnace, a converter, a vacuum treatment plant VDA / OD ( vacuum degassing (VD) or vacuum oxygen decarburization (VOD)), a waste incineration plant, a continuous casting plant, a rolling mill, emulsifying machining machine, a pickling line, etc. and also thin sludge treatment plants, cooling water treatment plants, for example sand / gravel filter, lamellar clarifier, Use the settling tank or the like, etc.
  • VDA / OD vacuum degassing
  • VOD vacuum oxygen decarburization
  • the fluid may be a process water stream, which is produced by passing the exhaust gas stream through a wet gas scrubbing, a thin sludge, cooling water or other fluid, which typically in one of the above systems - possibly with gas scrubber - and is particulate ,
  • the device for determining a concentration of particles in a fluid in the exemplary embodiments comprises a measuring cell having at least one input and one output.
  • the fluid flows through the inlet into the measuring cell and out through the outlet.
  • the measuring cell can be completely closed except for the input and the output, while in other embodiments it can also be at least partially open on one side, eg above.
  • the particles can be magnetic or magnetizable or non-magnetic in any desired nature (see also below).
  • the particles are typically particles that arise in one of the abovementioned systems, such as iron particles, scale particles or the like.
  • the device comprises a magnetic separator, which is designed and arranged such that it deposits particles which can be magnetized in the fluid by the magnetic field generated by it in the measuring cell.
  • the magnetic field attracts the magnetizable particles in the fluid, so that they are held by the magnetic field at the magnetic separator.
  • the magnetic separator may have a permanent magnet and / or an electromagnet in order to generate the magnetic field required for the deposition of the magnetizable particles.
  • the magnetic separator may in particular be arranged at least partially in the measuring cell. Particularly preferably, the magnetic separator is arranged completely in the measuring cell, except for supplying electrical lines in the case of an electromagnet.
  • the magnetic separator may be in direct contact with the fluid at least partially or completely (except for supplying electrical lines in the case of an electromagnet). It may be provided that the magnetic separator is designed as an electromagnet, that the coil or a portion comprising the coil is arranged in the measuring cell, wherein the lines provided for the flow of current are partially arranged outside the measuring cell.
  • Magnetic separator or of the permanent magnet and / or electromagnet can be determined together with the adhering particles.
  • the weight measurement can be determined as a physically directly feasible measurement without detours.
  • the device comprises a weight measuring device which is designed to measure the weight of the deposited particles.
  • the weight measuring device detects the weight of the magnetic separator together with the weight of the deposited particles that adhere to it.
  • the weight measuring device may in particular be a measuring device for determining a mass, which usually takes place via the weight force.
  • the weight is measured either directly or compared to a known mass.
  • the weight of the magnetic separator in particular by means of a method which determines a direct weight determination of the magnetic separator, which can be configured as a permanent magnet and / or electromagnet determined.
  • the device further comprises an evaluation device, which is designed to determine the concentration of the particles in the fluid in the measuring cell.
  • the evaluation device relates the mass or the
  • the difference in weight between the "clean" magnetic separator without adhering particles and the magnetic separator with adhering particles plus the Archimedean force corresponds to the mass of the deposited and the magnetic separator adhering particles.
  • the weight difference can not account for the Archimedean force even in a somewhat less accurate approximation.
  • magnetizable encompasses both magnetic and magnetizable particles which magnetically interact with the magnetic separator, whereby a magnetizable particle is first of all in the sense of the description or in non-magnetic environment non-magnetic, but as soon as it enters the environment of the magnetic separator, this particle is also magnetic.
  • magnetizable in the sense of the description also includes the term “magnetic”, so that magnetizable particles, those are particles which are suitable for being separated from the fluid by means of the magnetic field of the magnetic separator.
  • the evaluation unit may include a microprocessor programmed to calculate the particle concentration.
  • the mass of the deposited particles can be determined in the evaluation unit.
  • the evaluation unit has a volatile memory and / or a read-only memory in which values, as well as the weight of the clean magnetic separator, can be stored, so that the microprocessor from the difference between the stored weight of the clean magnetic separator and that of the Weight measuring device determined weight of the magnetic separator with deposited particles can determine the mass of the deposited particles.
  • embodiments store the density of the particles and the fluid from which the particles are deposited.
  • the evaluation unit can be set up to output the determined particle concentration, so that it can be used by another device, for example to control a production plant or to control agents that remove particles from the fluid, or can be read on a display.
  • weight also includes the related term “mass”. Exactly considered, however, is the mass, which is given for example in kilograms, unequal to the weight, since the weight or the
  • Weight force due to the applied to a body gravitational force which is proportional to the mass of the body results.
  • a proportionality of at least the value of the weight force to the mass is simplified.
  • the value of the "mass” is a quantity proportional to the value of the "weight”.
  • the weight measuring device is configured to transmit the weight of the particles adhering to the magnetic separator to the evaluation unit.
  • the weight measuring device can accordingly be provided with a calibration function and calibrated to the weight of the clean magnetic separator so that only the mass or the weight of the particles adhering to the magnetic separator is determined and output.
  • a magnetic separator By the separation of the particles by a magnetic separator, it is possible in some embodiments, even at high levels of contamination, ie at high particle concentrations, to reliably measure the particle concentration - in contrast
  • magnetic separators can be produced inexpensively and are available in the market in a variety of designs and thus easy to procure for the respective needs.
  • a particle concentration can be determined which is in the range of 0.01 to 20 g / L. Due to the defined dilution of a partial flow of the fluid before it enters the measuring cell and / or an enlargement of the magnetic separator, it is also possible to measure particle concentrations> 20 g / l.
  • a predetermined volume or a given volume flow of the fluid per unit time flows through the measuring cell. This can be the
  • Measuring cell corresponding adjustable or set valves have at the input and / or output, which dictate the amount and / or flow rate of the incoming and / or outflowing fluid in the measuring cell.
  • the valves are electrically, magnetically, pneumatically, hydraulically or in another way controllable and can be controlled, for example, by the evaluation unit in order to set a predetermined volume flow.
  • the geometry of the measuring cell is adapted to the fluid and the particle concentration of particles, for example by having a shape that supports the flow of the fluid and / or avoids turbulence, etc.
  • the measuring cell can also be designed as a flow channel.
  • the diameter of the measuring cell may correspond to that of the inlet or outlet for the fluid.
  • the measuring cell may have a rectangular, round (circular, elliptical) or other cross-section, etc.
  • For determining the volume of the fluid in the measuring cell may be arranged before and / or after the exit flow velocity and / or flow sensors or the like, which Determining the flow rate of the inflowing or outflowing liquid medium or the flow rate and transmit the corresponding values to the evaluation unit, so that it can determine from the volume flow of the fluid from which the particles are deposited.
  • the magnetic separator is configured such that all magnetic particles are separated from the fluid in the measuring cell.
  • the magnetic field generated by the magnetic separator is in some embodiments designed such that (almost) all magnetic or magnetizable
  • the generated magnetic field can be chen embodiments to the specific geometry of the measuring cell, the volume of the fluid, the particle concentration, the particle type, the (average) particle size, the (average) particle weight or the like to be tuned.
  • the magnetic field can be adjustable.
  • the evaluation unit sets the magnetic field accordingly, that all particles are deposited in the measuring cell.
  • the magnetic separator may be configured such that the deposited particles are automatically removable from the magnetic separator.
  • the magnetic field of the magnetic separator may be turned off so that the particles no longer adhere to the magnetic separator.
  • the magnetic separator can also be constructed in two parts (additionally). A first part generates the magnetic field, for example by means of permanent magnets, and is arranged within the second part such that the particles deposit on the outside of the second part. If the first part is removed from the second part, then the particles no longer adhere to the outside.
  • the measuring cell is then rinsed with a rinsing liquid.
  • the measuring cell can additionally have a rinse inlet and rinse outlet for the rinsing liquid.
  • a measuring method for determining a concentration of particles in a fluid may comprise the steps of:
  • This measuring method can be carried out, for example, by the evaluation unit or its microprocessor of the device described above or by another device designed accordingly for carrying out the measuring method.
  • a concentration of particles in a fluid can be determined.
  • a gas scrubber it is possible to determine a particle concentration in a gas stream by means of the gas scrubber, a mixture with a liquid stream can be performed to convert the gas stream in which the concentration of particles to be determined in a fluid stream or liquid flow , If the particle concentration in the liquid stream with which the gas stream is mixed is known, the concentration in the fluid which is determined can be deduced from the concentration in the gas stream.
  • the term "volume" of the flowing fluid includes the consideration of a stationary or moving volume of the fluid, for example it may be provided that a stationary or moved volume of the fluid is considered and the particles in the volume are deposited.
  • volume of the flowing fluid may also include a "volume flow” in which a flow rate through the considered volume of the measuring cell is taken into account.
  • magnetizable or magnetic carrier particles may be added to the fluid that form a compound with non-magnetic particles in the fluid, e.g. by means of a flocculant, so that the non-magnetic particles can be deposited by the magnetic carrier particles connected to them.
  • the magnetizable or magnetic carrier particles can be chemically, physically or in another way and
  • the carrier particles may be adapted for association with the non-magnetic and non-magnetizable particles in the fluid.
  • the carrier particle concentration in the fluid is known and stored, for example, in the evaluation unit, so that the proportion by weight of the carrier particles of the measured
  • Total weight is deductible and thus the particle concentration of the particles in the fluid can be determined without the carrier particles.
  • the deposited particles can be automatically removed by, for example, the magnetic separator is designed as stated above.
  • a flow rate of the fluid can be determined and / or a constant flow rate of the fluid can be adjusted and / or the magnetic particles can be deposited in a predetermined volume.
  • Some embodiments also relate to a production plant, as mentioned above or a cleaning plant for purifying exhaust gas streams / waste water streams or other fluids that are produced in such a production plant.
  • the production / cleaning system has a controller that receives the particle concentration by performing the measurement method described above and / or by the evaluation unit of the device described above. Based on the particle concentration, the particles are then removed from the fluid by, for example, adding flocculant in the appropriate dosage.
  • the cleaning of the fluid is also carried out by the method described above or the device described above. This may be useful, for example, for fluids with a very low particle concentration.
  • FIG. 1 shows a first embodiment of a measuring device for measuring a concentration of particles in a fluid
  • FIG. 2 shows a second embodiment of a measuring device for measuring a concentration of particles in a fluid; and a flow chart of a measuring method, the switching system of Fig. 1 in a sectional view, wherein the switching poles are in an untripped operating condition.
  • FIG. 1 shows a first exemplary embodiment of a measuring device 1 for measuring the concentration of particles 6 in a fluid 5.
  • the measuring device 1 has a measuring cell 2, through which the fluid 5 is supplied via an inlet designed as a feed line 3 and an outlet designed as a discharge 4 is discharged.
  • the measuring cell 2 has a defined volume 7. Accordingly, the fluid 5 in the measuring cell 2 also has essentially the volume 7 - except for components which are arranged next to the liquid medium 5 in the measuring cell 2, such as, for example, the magnetic separator explained below 8th.
  • a feed flow device 1 1 is provided in the feed line 3 and a discharge flow device 12 is provided in the discharge line 4.
  • the inflow device 1 1 and the outflow device 12 are each adapted to determine the flow rate of the fluid 5 flowing through them and to adjust the flow rate.
  • the measuring device 1 has a magnetic separator 8, which is formed in this embodiment as a cylindrical electromagnet and is arranged in the measuring cell 2.
  • the magnetic separator 8 is connected via a holder 13 with a weight meter 9, which in turn is attached to a support 18.
  • the weight meter 9 measures the weight of the magnetic separator 8.
  • the magnetic separator 8 generates a magnetic field which attracts the magnetic or magnetizable particles 6 and thus deposits these particles 6 on the magnetic separator 8. The particles 6 then adhere to the magnetic separator 8.
  • An evaluation unit 10 of the measuring device 1 is connected to the magnetic field of the magnetic separator 8 with this via a line 13.
  • the evaluation unit 10 is connected to this via a line 14 and the flow-through device 12 is connected via a line 15.
  • the evaluation unit 10 receives weight data from the weight meter 9 via a line 17.
  • the evaluation unit 10 evaluates the received weight data and determines from the known volume of the fluid 5 in the measuring cell 2 and the assumption that all particles 6 in this volume adhere to the magnetic separator 8, a particle concentration of the fluid 5 in the measuring cell 2 (in FIG 1, a state is visualized by way of illustration, in which not all particles 6 are yet adhering to the magnetic separator 8).
  • the volume 7 of the measuring cell 2 does not necessarily correspond exactly to the volume of the fluid 5 due to, for example, the magnetic separator 8. Accordingly, the evaluation unit 10 determines the volume of the fluid 5 in the measuring cell 2 on the basis of the feed flow device 11 and the Outflow device 12 transmitted flow rates. In other embodiments, the volume that occupies the fluid in the measuring cell 2 is simply stored in the evaluation unit 10.
  • the net weight of the magnetic separator 8 without adhering particles 6 is stored in a read-only memory of the evaluation unit 10.
  • the evaluation unit 10 has a microprocessor which determines from the received weight data and the stored net weight value of the magnetic separator 8 a weight of the adhering particles 6 and calculates the particle concentration therefrom.
  • the particle concentration can be output by the evaluation unit, for example, via a line or wirelessly and, for example, as indicated above, be received by a control of a production facility.
  • the evaluation unit also has a display on which the particle concentration and / or the determined particle weight and / or the volume of the fluid from which the particles have been deposited are output.
  • the weight meter 9 and the magnetic separator 8 is practically formed in one or as a unit.
  • the evaluation unit 10 shuts off the magnetic separator 8a so that it no longer generates a magnetic field and the particles 6 fall off.
  • the measuring cell can then, for example, be rinsed by means of a cleaning liquid and the particles 6 are removed.
  • a corresponding cleaning program for the measuring cell 2 is stored in the evaluation unit 10.
  • a measuring device 21 for measuring the particle concentration of particles 26 in a fluid 25 will be explained with reference to FIG. 2 in the second exemplary embodiment.
  • the structure and operation of identical components of the two embodiments are also substantially identical.
  • the measuring device 21 has a measuring cell 22, through which the fluid 25 is supplied via an inlet designed as a feed line 23 and an outlet designed as a discharge line 24 is discharged.
  • the measuring cell 22 has a defined volume 27. Accordingly, the fluid 25 in the measuring cell 22 also has essentially the volume 27 - except for components which are arranged next to the liquid medium 25 in the measuring cell 22, such as the magnetic separator explained below 28th
  • a feed flow device 31 is provided in the supply line 23 and a discharge flow device 32 is provided in the discharge line 24.
  • the feed flow device 31 and the drain flow device 32 are each configured to determine the flow velocity of the fluid 25 flowing through them and to adjust the flow velocity.
  • the measuring device 21 has a magnetic separator 28, which in this embodiment has a plurality of magnetic rods 28a, 28b, 28c and 28d, which are each formed as permanent magnets.
  • the magnetic separator 28 is fastened to a support 38 via a holder 33.
  • the holder 33 is in turn connected to a linear drive 39, which can move up and down the magnetic separator 28 with its individual magnetic bars 28a to 28d.
  • the magnetic separator 28 has four magnetic bars 28a to 28d. In other embodiments, more magnetic rods may be present and these may in principle be arranged arbitrarily.
  • the magnetic rods 28a to 28d may be engaged with a corresponding separating portion of the magnetic separator 28 formed of four separator tubes 40a to 40d with the separator tubes 40a to 40d connected to each other.
  • the magnetic bars 28a to 28d are complete and substantially in operation of the measuring cell 22 arranged fluid-tight in the separator tubes 40a to 40d. Accordingly, the magnetic particles 26 are attracted to the magnetic field generated by the magnetic bars 28a to 28d and adhere to the outside of the separator tubes 40a to 40d and do not get into the inside thereof. Consequently, no particles 26 adhere to the magnetic bars 28a to 28d.
  • the Abscheiderschreiben 40 a to 40 d are connected via a holder 41 and a support rod 42 with a weight knife 29, which in turn is attached to the support 38.
  • the weight meter 29 measures the weight of the separator tubes 40 a to 40 d with the holder 41 and the holding rod 42.
  • An evaluation unit 30 of the measuring device 21 is connected to the linear drive 39 with this via a line 36.
  • the evaluation unit 30 is connected to this via a line 34 and the flow-through device 32 it is via a
  • the evaluation unit 30 receives weight data from the weight meter 29 via a line 37.
  • the evaluation unit 30 determines the volume of the fluid 25 in the measuring cell 22 on the basis of the flow rates communicated from the inlet flow device 31 and the outlet flow device 32.
  • the evaluation unit 30 evaluates the received weight data, as has already been explained in connection with the first embodiment, and determines from the known or determined volume of the fluid 25 and the assumption that all particles 26 of the fluid 25 in the measuring cell 22 at the separator tubes 40a to 40d adhere, a particle concentration of the fluid 25 in the measuring cell 22 (in Fig. 2, a state is visualized for illustration, in which not all particles 26 adhere to the Abscheiderschreiben 40a to 40d).
  • the weight meter 29 is calibrated so that it
  • the evaluation unit 30 has a microprocessor which determines a particle concentration from the received weight data and the known volume of the volume contained in the measuring cell 22, from which the particles 26 were deposited.
  • the evaluation unit 30 controls the linear drive 39 in such a way that the magnetic rods 28a to 28d are moved out of the separator tubes 40a to 40d, so that the particles 26 adhering to the separator tubes 40a to 40d fall off, since the magnetic field of the magnetic rods 28a until 28d does not affect them anymore.
  • the distance of the upper wall of the measuring cell 2 to the Separating tubes 40a to 40d dimensioned accordingly in Fig. 2, the distance between Abscheiderschreiben 40a to 40d and the upper measuring cell wall is shown smaller than it is in reality).
  • the measuring cell 22 is provided at the top with a corresponding opening through which the magnetic separator 28 can be moved out. As already mentioned above, the measuring cell 22 can then be rinsed with a rinsing liquid in order to remove the particles 26 from it.
  • the particle concentration can be output by the evaluation unit 30, as already explained above, for example via a line or wirelessly and, for example, as indicated above, be received by a control of a production plant.
  • the evaluation unit 30 also has a display on which the particle concentration and / or the determined particle weight and / or the volume of the fluid from which the particles have been deposited are output.
  • FIG. 3 illustrates a flowchart of a measuring method for determining a concentration of particles in a fluid.
  • the measuring method is carried out in a cleaning or production plant, for example by the evaluation unit 10 or 30 of the first or second embodiment, or by a microprocessor or the like.
  • the method starts at 50 and generates a predetermined flow of the fluid in a step 51.
  • the flow of the fluid is formed for example by an outflow of a production plant and, for example, by a valve, a Strömungsbegren- zer or the like set.
  • a volume of the flowing fluid is determined.
  • the volume can, as stated above, be determined by the volume of a measuring cell or the like. However, it can also be determined by a flow rate determination or the like, as has already been explained above.
  • magnetizable particles in the detected volume of fluid are deposited by substantially 100 percent by applying a magnetic field.
  • the mass of the deposited particles is determined at 54. Based on the now known mass of the deposited particles, the concentration of the particles contained in the determined volume of the fluid is determined at 55. The measuring cycle can then be terminated 56 or repeated 57 until the maximum magnet load is reached. After cleaning the magnetic separator, the cycle can start anew. As stated above, the particle concentration determined in this way can be used, for example, for metering a flocculant to remove the particles from the fluid.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dispersion Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

L'invention concerne un dispositif de détermination de la concentration de particules dans un fluide. Le dispositif comprend: une cellule de mesure pourvue d'au moins une entrée et une sortie, le fluide circulant jusque dans la cellule de mesure en passant par l'entrée et sortant par la sortie, un séparateur magnétique conçu et disposé de manière à précipiter dans le fluide des particules magnétisables par le champ magnétique qu'il génère dans la cellule de mesure, un moyen de mesure de poids conçu pour mesurer le poids des particules précipitées, et un moyen d'évaluation conçu pour déterminer la concentration de particules dans le fluide de la cellule de mesure.
PCT/EP2018/068922 2017-07-14 2018-07-12 Dispositif et procédé de détermination de la concentration de particules dans un fluide WO2019012034A1 (fr)

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DE102017006676.0A DE102017006676A1 (de) 2017-07-14 2017-07-14 Vorrichtung und Verfahren zur Bestimmung einer Konzentration von Partikeln in einem Fluid

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111811984A (zh) * 2020-08-06 2020-10-23 上海市机电设计研究院有限公司 磁粉含量测定装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954943A (ja) 1982-09-22 1984-03-29 Daido Steel Co Ltd 流体中の磁性粒子量測定方法
EP1251344A2 (fr) * 2001-04-18 2002-10-23 AVL List GmbH Procédé de mésure des particules aérosols dans des échantillons gazeux
WO2007018187A1 (fr) 2005-08-05 2007-02-15 Kyowa Medex Co., Ltd. Instrument de mesure, kit de mesure employant cet instrument, procédé de mesure, dispositif de mesure, et procédé permettant de reproduire un oscillateur piézoélectrique
DE102012211538A1 (de) * 2012-07-03 2014-01-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und System zum Nachweisen von in einem Aerosol schwebenden Kohlenstoffnanoröhren
CN104165819B (zh) * 2013-08-29 2016-06-08 北京至感传感器技术研究院有限公司 一种在线实时磁性颗粒监测系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954943A (ja) 1982-09-22 1984-03-29 Daido Steel Co Ltd 流体中の磁性粒子量測定方法
EP1251344A2 (fr) * 2001-04-18 2002-10-23 AVL List GmbH Procédé de mésure des particules aérosols dans des échantillons gazeux
WO2007018187A1 (fr) 2005-08-05 2007-02-15 Kyowa Medex Co., Ltd. Instrument de mesure, kit de mesure employant cet instrument, procédé de mesure, dispositif de mesure, et procédé permettant de reproduire un oscillateur piézoélectrique
DE102012211538A1 (de) * 2012-07-03 2014-01-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und System zum Nachweisen von in einem Aerosol schwebenden Kohlenstoffnanoröhren
CN104165819B (zh) * 2013-08-29 2016-06-08 北京至感传感器技术研究院有限公司 一种在线实时磁性颗粒监测系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111811984A (zh) * 2020-08-06 2020-10-23 上海市机电设计研究院有限公司 磁粉含量测定装置
CN111811984B (zh) * 2020-08-06 2022-07-19 上海市机电设计研究院有限公司 磁粉含量测定装置

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