EP2062648A2 - Séparateur électrostatique - Google Patents

Séparateur électrostatique Download PDF

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Publication number
EP2062648A2
EP2062648A2 EP08019885A EP08019885A EP2062648A2 EP 2062648 A2 EP2062648 A2 EP 2062648A2 EP 08019885 A EP08019885 A EP 08019885A EP 08019885 A EP08019885 A EP 08019885A EP 2062648 A2 EP2062648 A2 EP 2062648A2
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EP
European Patent Office
Prior art keywords
energy
amount
electrode
change
supplied
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08019885A
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German (de)
English (en)
Other versions
EP2062648A3 (fr
EP2062648B1 (fr
Inventor
Dietmar Dr. Steiner
Tania Gonzalez Baquet
David Schütz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
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Priority claimed from DE200710056704 external-priority patent/DE102007056704B3/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2062648A2 publication Critical patent/EP2062648A2/fr
Publication of EP2062648A3 publication Critical patent/EP2062648A3/fr
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Publication of EP2062648B1 publication Critical patent/EP2062648B1/fr
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    • 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
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/68—Control systems therefor
    • 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
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/41—Ionising-electrodes
    • 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
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/49—Collecting-electrodes tubular
    • 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
    • B03C2201/06—Ionising electrode being a needle
    • 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
    • B03C2201/32—Checking the quality of the result or the well-functioning of the device

Definitions

  • the invention relates to a method for determining a state of an electrostatic precipitator according to the preamble of claim 1. Furthermore, the invention relates to a method for detecting a particle concentration in a particle stream of an electrostatic precipitator. The invention further relates to an electrostatic precipitator operated with electrical energy, in particular for an exhaust gas line of an exhaust gas purification system, according to the preamble of patent claim 12.
  • emission control systems Due to emissions from heating systems and global efforts to reduce such emissions - see, for example, the Kyoto Protocol - heating systems use appropriate emission control systems. These are in particular to filter out the harmful substances and particles from exhaust gases, so that the remaining, purified exhaust gas can be safely released to the environment.
  • emission control systems are used in biomass heating systems, where in addition to otherwise economic and environmental benefits increased emissions of pollutants in the exhaust gases can occur.
  • biomass heating systems where in addition to otherwise economic and environmental benefits increased emissions of pollutants in the exhaust gases can occur.
  • relatively high emission of particulate matter as a pollutant component is a problem in biomass heating systems.
  • An emission control system which is used for biomass heating systems to reduce particulate matter emission.
  • the device described therein can be installed in a flue gas channel and for this purpose has a lid which can be placed gas-tight on an associated opening on a flue gas channel.
  • a spray electrode for example in the form of a tensioned rod, is held over an insulating holder.
  • a high-voltage transformer with rectifier function allows the construction of a high DC voltage between the wire and the lid, which is electrically connected to the furnace tube, so that it acts as a collector electrode.
  • Such an electrostatic filter with a spray electrode and a collector electrode is also known as an electrostatic precipitator.
  • This is used for exhaust gas purification in an exhaust pipe of a heating system. It is characterized by the spray, which runs approximately centrally through the exhaust pipe and is therefore also referred to as the center electrode, and a surrounding outer surface of the exhaust pipe, a capacitor is formed, which is also referred to as a cylindrical capacitor in a cylindrical tube-shaped design of the exhaust pipe.
  • the spray or center electrode generally has a circular cross section in the flow direction of the exhaust gas, wherein the diameter of the cross section or the radius of curvature is generally formed relatively small (for example, less than 0.4 mm).
  • a field extending transversely to the flow direction is formed by the center electrode and the collector electrode formed by the lateral surface with field lines from the center electrode to the collector electrode.
  • a high voltage is applied to the center electrode, for example in the range of 15 kV.
  • a corona discharge is formed, through which the particles flowing through the field in the exhaust gas are charged in a unipolar manner. Due to this charge, the particles move through the electrostatic Coulomb forces to the inner wall of the exhaust pipe, which serves as a collector electrode.
  • electrostatic precipitators is the following:
  • free charge carriers in the form of ions are introduced into a filter area around the electrostatic precipitator by local gas discharges (corona discharges at a spray electrode). If the ions hit the soot or ash particles in the flue gas, the charges are transferred to the particles (unipolar charging). The charge generating electric field then drives the charged particles away from the electrode, which is also referred to as a spray electrode. A large part of the particles finally settles on the precipitation electrode (in this case the tube or chimney wall) and sticks there. From there, the particles can be removed by special cleaning equipment.
  • a particle layer builds up on the spray electrode of the separator.
  • the growing particle layer causes a reduction of the active surface of the spray electrode, which reduces the formation of the number of ions necessary for particle separation.
  • Reasons for the contamination of the spray electrode are described below by way of example for a negative corona discharge.
  • the document WO 2006/000114 A1 describes a method for monitoring the condition of the spray electrode.
  • the spray electrode during the filter operation added to mechanical vibrations while the AC component of the operating current of the spray detected. Too high a frequency of the alternating current component indicates a shortening (wear, breakage) of the electrode, too low a frequency indicates contamination of the electrode by deposits. The latter phenomenon can be explained by the reduction of the mechanical natural frequency of the electrode with increasing mass of particles adhering to the electrode. It is therefore the utilization of a mechanical effect.
  • a need for maintenance is signaled or a cleaning process is triggered.
  • the document DD 207 339 A describes a control device for a DC high voltage generator for feeding electrostatic precipitators and a method for operating electrostatic precipitators, which are operated just below the threshold value of an electrical flashover. In this case, a certain number of high-voltage flashovers between charging electrode and collecting electrode per unit time is accepted.
  • the patent describes a method or an electronic circuit which minimizes the electrical energy consumption of this mode of operation.
  • the document SE 2000-662 A describes a method for pulsed operation of an electrostatic precipitator. During a current pulse, the corresponding values of the rising and falling edges of the voltage are measured and registered. An internal algorithm then calculates from these values and the duration of the current pulse the optimum parameters (driving voltage, frequency) for the following current pulse.
  • the invention has for its object to provide a method and an electrostatic precipitator, with which the state of the electrostatic precipitator is detected. It is a further object of the invention to provide a method and an electrostatic precipitator with which the particle concentration in the exhaust gas of the electrostatic precipitator is detected. More specifically, it is an object of the invention to detect contamination of the center electrode and to display them to initiate any necessary steps for maintenance of the electrostatic precipitator, as well as to detect the particle concentration, to monitor them and / or possibly required steps for optimized control of initiate electrostatic precipitator.
  • the method for determining a state of an electric energy-operated electrostatic precipitator having at least one electrode for separating exhaust particles in the vicinity of the electrode, in particular for an electrostatic precipitator in an exhaust pipe of an exhaust gas purification system comprising the steps of: supplying a quantity of electrical energy to the Electrode over a period of operation of the separator to produce a predetermined corona discharge, and consuming at least a portion of the amount of electrical energy for the corona discharge at the electrode for charging the exhaust particles is characterized in that the steps are: detecting the supplied and / or or consumed amount of energy during at least two times of operation time, determining a change in the detected amount of energy, and generating a signal based on the determined change, which is the state of the electrostatic precipitator re presents.
  • a state may be a deposition efficiency of the electrostatic precipitator.
  • the separation efficiency depends on a corona current. This in turn depends on an applied high voltage and a degree of contamination of the electrode. This means that the high voltage required to generate the necessary corona discharge increases with increasing particle layer on the electrode.
  • This effect can be measured by means of a characteristic current / voltage characteristic of the separator, for example at the high voltage supply. The corresponding characteristic shifts with increasing operating time or growing particle layer on the spray electrode in the direction of higher operating voltages. This effect is called degradation of the current / voltage characteristic. According to the invention, this effect is used to determine the degree of contamination of the spray electrode via the high-voltage supply. Since the operating voltage can be increased to a maximum of a breakdown voltage of the electrostatic precipitator, excessive contamination of the spray electrode must be avoided.
  • the particle concentration is correlatable to a corona stream.
  • the corona current depends on both an applied high voltage and a degree of contamination of the electrode and the particle concentration in the particle flow. This means that, on the one hand, the high voltage required to produce a constant corona discharge (constant current mode) increases with increasing electrode contamination. This effect can be measured by means of a characteristic current / voltage characteristic of the separator, for example at the high voltage supply and is referred to as degradation of the current / voltage characteristic. The corresponding characteristic shifts within several hundred hours of operation with increasing particle layer in the direction of higher operating voltages.
  • the detection of the supplied amount of energy comprises the step of: detecting a supplied amount of current.
  • the detection of the supplied amount of energy comprises the step of: detecting a supplied voltage amount.
  • a combination of the two steps is provided.
  • the step of determining a change in the detected amount of energy comprises the step of: determining at least one Mean value of the change over a period of time.
  • the determination of the change in the detected amount of energy can be carried out continuously or discretely.
  • the step of determining at least one mean value comprises the steps of: determining a plurality of mean values of the change over time periods and determining the change of the mean values over the time periods.
  • the durations can be the same length.
  • a preferred embodiment provides that the step of determining a change comprises the steps of: assigning the detected values to predetermined particle concentration values taking into account the change in the mean values and in the event of a change in the mean values which is above a limit value, performing a new assignment of the detected values to given particle concentration values.
  • a supplied output quantity of energy in an initial state of the electrode is detected, a supplied actual amount of energy is detected, and a maximum deliverable amount of energy is detected.
  • the supplied actual amount of energy is compared with the supplied initial amount of energy, the previously detected actual amount of energy and / or the maximum deliverable amount of energy. From the comparison, i. the change thus determined, a signal is calculated or determined by assignment, which as a result represents the particle concentration of the exhaust gas.
  • the capture operation includes predetermining, presetting, manual input, and the like.
  • the step of generating a signal comprises the steps of: detecting a supplied initial amount of energy in an initial state of the electrode, detecting a supplied actual amount of energy, detecting a maximum deliverable amount of energy, comparing the supplied actual amount of energy with the supplied initial amount of energy, the previously detected actual amount of energy and / or the maximum deliverable amount of energy and calculating a signal representing the efficiency of the electrostatic precipitator as a result of the comparison.
  • the capture operation includes predetermining, presetting, manual input, and the like.
  • the step of generating a signal further comprises the steps of: simulating an operation of the electrostatic precipitator and generating a signal based on the simulated operation.
  • the simulation is preferably model-based.
  • the step of generating a signal comprises the step of generating at least one signal representing a state of the electrostatic precipitator selected from the group of states efficiency, power consumption, pollution degree, maintenance time, cleaning time and the like of the precipitator.
  • the step of generating a signal comprises a reproduction, a forwarding and / or a further processing of the generated signal.
  • the reproduction can be made optically or acoustically on a display, for example.
  • the transfer can be made, for example, to a control center.
  • the signal can be further processed in a controller.
  • the electrostatic. Separator is characterized in that it comprises means for carrying out the method according to the invention.
  • an electrostatic precipitator with a flow channel having a channel wall and a channel inside, through which flows a particle-containing exhaust gas in a flow direction, in the channel interior substantially in the flow direction extending electrode for generating a corona discharge in the flow channel and a Electrode supply to supply the electrode with electrical energy, further at least one sensor for detecting a supplied amount of energy and a signal generator for generating a signal based on or based on a change in the amount of energy supplied, the signal indicating the state of the electrostatic Depositor and / or the particle concentration of the exhaust gas represents.
  • the sensor can be designed as part of the high voltage supply and / or the electrode supply.
  • the electrode feed is at least partially encased with an insulator, further comprising at least one particle repelling agent, which prevents particles of the exhaust gas from depositing on the insulator and / or the electrode.
  • the signal generator has at least one data memory with predefinable particle concentration values, which can be correlated to the signals detected by the sensor, and a processor for calculating mean values and performing comparison operations in order to use the detected signals to determine mean values and changes to calculate the mean values and, taking into account the change in the mean values, to carry out an assignment of the detected signals to the particle concentration values correlated therewith.
  • an electric field is generated in the channel interior by the electrode fed with high voltage and acting as counter electrode channel wall, wherein the field lines extend transversely to the flow direction of the exhaust gas, preferably perpendicular to the electrode.
  • an electrode feed which supplies the electrode with high voltage from an external voltage source. So that no discharge of the electrode takes place via the electrode feed, this is at least partially encased with an insulator.
  • the insulator is preferably formed of an insulating material comprising ceramics and the like.
  • the method and / or the electrostatic precipitator may be used in a heating system.
  • the corresponding heating system is characterized in that for generating energy by combustion of an energy source such as biomass with a particulate matter emitting heating system such as a biomass heating system for burning the energy source, particulate containing exhaust gases, an inventive electrostatic precipitator is provided or the inventive method Application finds.
  • Fig. 1 schematically shows an electrostatic precipitator 1 in a cross section.
  • the electrostatic precipitator 1 is arranged in an exhaust pipe 2 (only partially shown) of an exhaust gas purification system not shown here, and comprises: a flow channel 3.
  • the flow channel 3 is formed as a tubular portion of the exhaust pipe 2 and comprises a channel wall 4 and a channel interior Flow channel 3 flows here shown by arrows P, particle-containing exhaust gas in the flow direction also shown by the arrows P.
  • an electrode 6, which is also referred to as a center electrode or corona electrode extends in the interior of the flow channel 3.
  • the flow channel 3 is preferably formed in a rotationally symmetrical about a central axis A in cross section to the flow direction P.
  • the electrode 6 extends along this central axis A.
  • the electrode 6 is fed via an electrode feed 7, which is covered with an insulator 8, which is preferably made of a ceramic. Together with the duct wall 4, the electrode 6 forms a charging unit, in which particles S are electrically can be charged.
  • the electrode 6 forms an electric field with the channel wall 4 while applying a high voltage, the field lines of which extend essentially radially to the electrode 6 or the channel wall 4, essentially transversely, more precisely at right angles, to the flow direction P.
  • Particles S adhere and form a particle layer (as shown), which affects the generation of the electric field or the corona discharge.
  • the larger the particle layer S the more the generation of the electric field or the corona discharge is impaired. That is, to generate a sufficient, predetermined electric field, a larger amount of energy is needed.
  • the amount of energy required to feed the electrode 6 is detected by a sensor 9.
  • the sensor 9 may detect the amount of current, the amount of voltage, and the like.
  • the illustrated electrostatic precipitator 1 has a signal generator 10, which generates one or more signals based on the change in the detected amount of energy, which represent the state of the electrostatic precipitator 1, more precisely the electrode 6, and / or the concentration of the particles S. These signals can be output via display means 11 and / or passed on to a control device for controlling the heater and / or separator operation.
  • the display means 11 may be formed for example as LEDs.
  • the high combustion temperatures (up to approx. 1200 ° C) cause an ionization of the gases (thermionic discharge).
  • the resulting positive and negative ions generate electrostatically charged particles S.
  • the particle stream reaches the spray electrode 6 of the separator 1, some of the positively charged particles deposit on it before they can be negatively charged.
  • the ionization of the air molecules at the spray electrode 6 a part is split into positive ions and electrons.
  • the particles move in the electric field according to their charge to the positive or negative electrode 6.
  • positively charged particles S can arise, which can accumulate on the spray electrode 6.
  • appropriate display means 11, such as LEDs, acoustic signals, etc. can be signaled that the electrode 6 must be cleaned or replaced to an effective and optimal Operation of the separator 1 to cause or that the concentration of particles S in the particle flow is too large and appropriate steps must be taken to effect an effective and optimal operation of the separator 1.
  • Fig. 2 schematically shows a functional diagram of the correlation of corona current and high voltage.
  • the high voltage is plotted and on the ordinate the corona current.
  • five characteristic current / voltage characteristics S1 to S5 are entered, which are respectively detected at different times T1 to T5.
  • the stress lines S1 to S5 which differ in particular in the range of high high voltages (right on the abscissa) and high corona current (on the top of the ordinate), are entered in the diagram starting with an earliest time T1 up to a latest time T5.
  • the dashed arrow indicates the increasing degree of soiling of the electrode 6, by which the degradation is caused.
  • the characteristic increases with increasing voltage following a polynomial function.
  • Fig. 3 schematically shows a functional diagram of corona flow and filter efficiency or separation efficiency.
  • the abscissa shows the corona current and the ordinate the deposition efficiency.
  • the efficient range Be lies with the smallest possible corona current values, in which the separation efficiency just reaches the flat plateau. This is in FIG. 3 the area Be around the point OBP (optimal operating point). From there on to the left, the deposition efficiency becomes progressively smaller. Based on this relationship, the deposition efficiency can be indicated, for example, via LEDs.
  • Fig. 4 schematically shows a functional diagram of the correlation of corona current IC and particle concentration CP over time.
  • the time is plotted and on the ordinate the Coronastrom or the particle concentration.
  • the upper of the two functional lines identifies the particle concentration CP and the lower functional line indicates the corona current IC.
  • the two functional lines run essentially parallel to one another over the measured time, so that a direct correlation between corona current and particle concentration can be assumed. This correlation effect is used to deduce the particle concentration from the measurement of the corona current.
  • degradation is used to contamination, in particular a no longer tolerable contamination of the electrode be recognized so that appropriate steps can be taken early on.
  • the measurement of the energy is used to detect a particle concentration, in particular a no longer tolerable particle concentration, so that appropriate steps can be taken early on.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
EP08019885.6A 2007-11-24 2008-11-14 Séparateur électrostatique et procédé Active EP2062648B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710056704 DE102007056704B3 (de) 2007-11-24 2007-11-24 Elektrostatischer Abscheider und Verfahren zur Bestimmung eines Zustandes eines mit elektrischer Energie betriebenen elektrostatischen Abscheiders
DE200810010371 DE102008010371A1 (de) 2007-11-24 2008-02-21 Elektrostatischer Abscheider und Verfahren zur Bestimmung einer Partikelkonzentration eines durch einen elektrostatischen Abscheider strömenden Abgases

Publications (3)

Publication Number Publication Date
EP2062648A2 true EP2062648A2 (fr) 2009-05-27
EP2062648A3 EP2062648A3 (fr) 2013-05-29
EP2062648B1 EP2062648B1 (fr) 2019-06-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012162004A1 (fr) * 2011-05-24 2012-11-29 Carrier Corporation Surveillance du courant dans un système de filtration d'air électriquement amélioré

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD207339A1 (de) 1982-05-21 1984-02-29 Karl Richter Regeleinrichtung fuer einen gleichspannungs-hochspannungserzeuger zur speisung elektrostatischer abscheider
EP1193445A2 (fr) 2000-10-02 2002-04-03 Eidgenössische Materialprüfungs- und Forschungsanstalt Empa Dispositif pour épurer les gaz de combustion de petites installations de chauffe
WO2006000114A1 (fr) 2004-06-29 2006-01-05 Eidgenössische Materialprüfungs- und Forschungsanstalt Empa Procede et unite de commande pour reguler une tension de service et pour controler l'usure d'un dispositif pour la separation electrostatique des particules dans des flux gazeux

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1675730B (zh) * 2002-06-21 2011-01-12 德塞拉股份有限公司 控制流体流动的静电流体加速器和方法
WO2007051239A1 (fr) * 2005-10-31 2007-05-10 Indigo Technologies Group Pty Ltd Systeme de commande d'energisation de precipitateur
JP4665839B2 (ja) * 2006-06-08 2011-04-06 パナソニック電工株式会社 静電霧化装置
EP1872858A3 (fr) * 2006-06-29 2011-05-11 Siemens Aktiengesellschaft Procédé d'optimisation d'un filtre électrostatique multi-zones

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD207339A1 (de) 1982-05-21 1984-02-29 Karl Richter Regeleinrichtung fuer einen gleichspannungs-hochspannungserzeuger zur speisung elektrostatischer abscheider
EP1193445A2 (fr) 2000-10-02 2002-04-03 Eidgenössische Materialprüfungs- und Forschungsanstalt Empa Dispositif pour épurer les gaz de combustion de petites installations de chauffe
WO2006000114A1 (fr) 2004-06-29 2006-01-05 Eidgenössische Materialprüfungs- und Forschungsanstalt Empa Procede et unite de commande pour reguler une tension de service et pour controler l'usure d'un dispositif pour la separation electrostatique des particules dans des flux gazeux

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012162004A1 (fr) * 2011-05-24 2012-11-29 Carrier Corporation Surveillance du courant dans un système de filtration d'air électriquement amélioré
US9797864B2 (en) 2011-05-24 2017-10-24 Carrier Corporation Current monitoring in electrically enhanced air filtration system

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EP2062648A3 (fr) 2013-05-29
EP2062648B1 (fr) 2019-06-19

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