EP0039817A1 - Méthode de réglage de la tension d'un électrofiltre placé dans une installation - Google Patents

Méthode de réglage de la tension d'un électrofiltre placé dans une installation Download PDF

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Publication number
EP0039817A1
EP0039817A1 EP81103149A EP81103149A EP0039817A1 EP 0039817 A1 EP0039817 A1 EP 0039817A1 EP 81103149 A EP81103149 A EP 81103149A EP 81103149 A EP81103149 A EP 81103149A EP 0039817 A1 EP0039817 A1 EP 0039817A1
Authority
EP
European Patent Office
Prior art keywords
voltage
filter
parameter values
electrofilter
breakdown
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
EP81103149A
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German (de)
English (en)
Other versions
EP0039817B1 (fr
Inventor
Helmut Dipl.-Ing. Herklotz
Günter Mehler
Franz Dipl.-Ing. Neulinger
Helmut Dipl.-Ing. Schummer
Horst Dr. Dipl.-Ing. Daar
Walter Dipl.-Ing. Schmidt
Heinrich Winkler
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.)
GEA Group AG
Siemens AG
Original Assignee
Metallgesellschaft AG
Siemens AG
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 Metallgesellschaft AG, Siemens AG filed Critical Metallgesellschaft AG
Priority to AT81103149T priority Critical patent/ATE8849T1/de
Publication of EP0039817A1 publication Critical patent/EP0039817A1/fr
Application granted granted Critical
Publication of EP0039817B1 publication Critical patent/EP0039817B1/fr
Expired legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S323/00—Electricity: power supply or regulation systems
    • Y10S323/903—Precipitators

Definitions

  • the invention relates to a method for regulating the voltage of an electrostatic filter used in a system, in which the filter voltage is reduced by a predetermined value during breakdown and is then increased with a predetermined temporal voltage gradient until the breakdown occurs again.
  • This generic term refers to electrostatic filter controls, such as are described in more detail in Siemens Zeitschrift 1971, Issue 9, pages 567 to 572, for example.
  • the control works so that after reaching the operating voltage, the filter voltage of the respective breakdown voltage is adjusted by scanning the breakdown limit. After each breakthrough, the power supply to the filter is blocked immediately and with after a deionization time ramped up to a voltage that is a small amount less than the voltage before the breakdown. From this value, the control voltage and thus the filter voltage is then slowly increased again at an adjustable speed until another breakdown, whereupon the measures described above are repeated.
  • the breakdown frequency is dependent on the amount of voltage drop after each breakdown and the voltage gradient over time.
  • the nominal current of the system is also of interest. If the dust resistance is low, the nominal current limit of the system can be reached earlier than the breakthrough limit. Even in such a case, the automatic control system must limit the current, and the current limit should also be adjustable.
  • the object of the present invention is to design the method of the type mentioned at the outset such that the operating point of the filter is as optimal as possible to the changing operating states of the overall system is adjusted.
  • This object is achieved according to the invention in that a number of parameter values used for regulation are stored when the filter is started up and in that the parameter values which are effective during filter operation are dependent on the process state of the system.
  • the filter operation can be adapted to the changing process conditions.
  • the electrostatic filter system connected downstream of a converter may serve as an example. It can be seen that the dust accumulation will also differ during the various operating states of the converter system.
  • the operating point of the electrostatic precipitator or the electrostatic precipitator system is also set in such a way that energy is not wasted unnecessarily. Further examples of this are given at the end of the description.
  • the method described above can be used with advantage when using a microcomputer control. It is only necessary to write the relevant parameter values into the semiconductor memory of the control when the filter control is started up and to activate the individual values depending on the process.
  • the parameter values can also be advantageously changed by a higher-level master computer, which is informed about the respective status of the overall process and can accordingly calculate optimization strategies.
  • the high-voltage rectifier 4 supplying the direct voltage for the electrostatic filter 1 is fed from an alternating-voltage network N via a thyristor actuator 2 and a high-voltage transformer 3.
  • the control voltage U st for the control rate 5 of the thyristor actuator 2 is generated by, for example, a digital controller 6, to which the signals on the actual value side are supplied, inter alia, the primary current Ip, the filter current I F and the filter voltage U.
  • the controller 6 is also supplied with a signal D which indicates a breakdown.
  • a high-voltage breakdown detection is described, for example, in the above-mentioned article from Siemens magazine 1971.
  • the voltage is reduced by a predetermined value.
  • This value can be selected as a percentage value k of the filter voltage present in each case; ie the filter voltage drop is where, for example, k can fluctuate between 1 and 5%.
  • a number of these parameter values k are written into a memory 61 assigned to the controller 6 when the control is started up:
  • the voltage is then increased again with a predetermined temporal voltage gradient ⁇ until the next breakdown.
  • a number of different gradients are stored in a further memory 62 when the control is started up.
  • the control unit receives signals dependent on the process, e.g. represented by line 11.
  • Process-dependent signals can e.g. Serve signal signals about the operating state of the overall system, e.g. Blowing operation with a converter or information about gas speed and gas humidity. Additionally or alternatively, the process-dependent signals can also be derived from a dust loading measuring device 8 provided in the electrostatic filter 1.
  • the control unit 7 can be constructed in a relatively simple manner, for example in the form of a decoder, it only needs a corresponding switch in each case for a specific request and report of operating states on the line 11 position of the switch 64 to correspond.
  • FIG. 2 which represents an idealized course of the DC filter voltage
  • a filter breakdown D occurs at time t 0 .
  • the voltage is then increased, if necessary after a certain waiting time, until the breakdown D occurs again at time t 1 , whereupon the game is repeated again.
  • FIG. 3 shows the structure of the digital controller 6 as a microcomputer system 9.
  • the microcomputer system consists essentially of two microprocessors 91 and 92, of which the microprocessor 91 is used for the actual control and the microprocessor 92, which works as a slave processor, the measured value processing and Puncture detection.
  • An input / output 95 is also connected to the bus 96, to which the two microprocessors 91 and 92 are connected, via which the microcomputer system takes the measured values from the electrostatic precipitator system and outputs the control voltage Uan to the actuator 5.
  • a semiconductor memory 93 for the system program and the data is also connected to the same bus 96. Communication with a higher-level master computer is possible via a coupling module 94, which is also provided, as indicated by line 99.
  • the microcomputer system is constructed in the same way for all filter systems a supply device 97 entered the individual parameter values with the aid of a programming device 98. In this way, the same control can be individually adapted to the different filters and filter zones.
  • the gas 12 to be cleaned flows through the individual filters one after the other in the direction of the arrow.
  • the single filter, e.g. I comprises the components designated 1 to 5 in FIG. 1.
  • Each of the electrostatic filters I-III is assigned a control microcomputer system 9, which communicates with a higher-level control computer 10 via a bus 99. With this master computer, optimization strategies can then be calculated and, depending on the dust loading detected by a measuring device 8 and / or the operating states of the system supplied via line 11, those parameter values are activated in the controls 9 which result in an optimal overall efficiency of the system; e.g. it is conceivable that the filters 1 and 2 are reduced in their output in the time of a low dust accumulation and only the filter 3 is operated at full output.
  • Process-dependent signals can e.g. Messages about belt standstill serve in a sintering plant or in a cement plant messages about a temperature change in the rotary kiln, about switching on or the shutdown of the cement mill or the like.
  • process signals temperature, dust fraction, gas composition (C0, H 2 etc.), raw gas dust quantity, clean gas dust content, pressure, gas velocity, dust resistance and gas humidity; in a power plant: load condition, load change gradient, Type of coal burned (sulfur content) and in the case of waste incineration: type of waste to be burned (composition), type of additional combustion (oil, natural gas, coal).
  • the parameters affected by parameters include: filter current, filter voltage, permitted undervoltage limit, permitted number of breakdowns, gradient of the scan, level of filter voltage reduction during the knocking measures, recording of the filter characteristics allowed (yes / no), pause time of the knocking, duration of the knocking, frequency knocking measures, addition of conditioning additives (e.g. 50 3 , H 2 0), type of reaction to a breakdown (e.g. length of deionization time, ramp-up time, voltage reduction), time length of the search periods (for optimization strategies) and time length of keeping the filter voltage constant (to Breakthrough limit is sampled again).
  • conditioning additives e.g. 50 3 , H 2 0
  • type of reaction to a breakdown e.g. length of deionization time, ramp-up time, voltage reduction
  • time length of the search periods for optimization strategies
  • time length of keeping the filter voltage constant to Breakthrough limit is sampled again.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
  • Elimination Of Static Electricity (AREA)
  • Superconductor Devices And Manufacturing Methods Thereof (AREA)
  • Inorganic Insulating Materials (AREA)
  • Feedback Control In General (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Control Of Electrical Variables (AREA)
EP81103149A 1980-05-08 1981-04-27 Méthode de réglage de la tension d'un électrofiltre placé dans une installation Expired EP0039817B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103149T ATE8849T1 (de) 1980-05-08 1981-04-27 Verfahren zum regeln der spannung eines in einer anlage eingesetzten elektrofilters.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803017685 DE3017685A1 (de) 1980-05-08 1980-05-08 Verfahren zum regeln der spannung eines in einer anlage eingesetzten elektrofilters
DE3017685 1980-05-08

Publications (2)

Publication Number Publication Date
EP0039817A1 true EP0039817A1 (fr) 1981-11-18
EP0039817B1 EP0039817B1 (fr) 1984-08-08

Family

ID=6101937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103149A Expired EP0039817B1 (fr) 1980-05-08 1981-04-27 Méthode de réglage de la tension d'un électrofiltre placé dans une installation

Country Status (7)

Country Link
US (1) US4432061A (fr)
EP (1) EP0039817B1 (fr)
JP (1) JPS574245A (fr)
AT (1) ATE8849T1 (fr)
AU (1) AU534688B2 (fr)
DE (2) DE3017685A1 (fr)
ZA (1) ZA813032B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071592A2 (fr) * 1981-07-28 1983-02-09 Fläkt Aktiebolag Dispositif de commande pour un séparateur électrostatique de poussière
EP0186338A2 (fr) * 1984-12-12 1986-07-02 F.L. Smidth & Co. A/S Procédé de commande de la fréquence de pulsation pour un précipitateur électrostatique fonctionnant à pulsations
DE4142501C1 (fr) * 1991-12-21 1992-12-10 Metallgesellschaft Ag, 6000 Frankfurt, De
WO1997035666A1 (fr) * 1996-03-28 1997-10-02 ABB Fläkt Aktiebolag Technique de commande d'un precipitateur electrostatique
AT406345B (de) * 1992-07-04 2000-04-25 Rothemuehle Brandt Kritzler Verfahren zum betrieb eines elektrofilters sowie elektrofilter zur ausübung des verfahrens
EP2873464A1 (fr) * 2013-11-13 2015-05-20 Siemens VAI Metals Technologies GmbH Filtration d'un gaz d'échappement, présentant des particules solides, d'une installation technique sidérurgique

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3048979C2 (de) * 1980-12-24 1986-09-04 Thyssen Industrie Ag, 4300 Essen Verfahren zum Betrieb eines Elektroabscheiders für die Gasentstaubung und Vorrichtung dazu
DK355382A (da) * 1982-08-09 1984-02-10 Smidth & Co As F L Fremgangsmaade til styring af et impulsdrevet elektrofilter til minimal effektoptagelse ved en given rensningsgrad
DE3233249C2 (de) * 1982-09-08 1986-10-02 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Steuern eines Elektroabscheiders und Steuerungsvorrichtung zur Durchführung des Verfahrens
DE3241060A1 (de) * 1982-11-06 1984-05-10 Buckau-Walther AG, 4048 Grevenbroich Elektrische schaltung fuer einen elektrostatisch arbeitenden staubabscheider
DE3326041A1 (de) * 1983-07-20 1985-02-07 Siemens AG, 1000 Berlin und 8000 München Regeleinrichtung fuer ein elektrofilter
US4605424A (en) * 1984-06-28 1986-08-12 Johnston David F Method and apparatus for controlling power to an electronic precipitator
US4747061A (en) * 1986-03-17 1988-05-24 Westinghouse Electric Corp. Automatic transfer switch for a wide range of source voltage
DK552186A (da) * 1986-11-19 1988-05-20 Smidth & Co As F L Fremgangsmaade og apparat til detektering af tilbagestraaling i et elektrofilter med almindelig eller intermitterende jaevnspaendingsforsyning
DK171319B1 (da) * 1987-08-06 1996-09-02 Smidth & Co As F L Fremgangsmåde til styring af en roterovn under opstart
US4811197A (en) * 1987-09-02 1989-03-07 Environmental Elements Corp. Electrostatic dust collector system
DK0534950T3 (da) * 1990-04-04 1995-12-18 Siemens Ag Reguleringsfremgangsmåde til strømforsyningsindretningen i et elektrofilter
US5378978A (en) * 1993-04-02 1995-01-03 Belco Technologies Corp. System for controlling an electrostatic precipitator using digital signal processing
DE10050188C1 (de) * 2000-10-09 2002-01-24 Siemens Ag Verfahren zum Betrieb eines Elektrofilters
DE10214185A1 (de) * 2002-03-28 2003-10-16 Siemens Ag PC-Anordnung für Visualisierungs-, Diagnose- und Expertensysteme zur Überwachung und Steuerung bzw. Regelung von Hochspannungsversorgungseinheiten von Elektrofiltern
EP1872858A3 (fr) * 2006-06-29 2011-05-11 Siemens Aktiengesellschaft Procédé d'optimisation d'un filtre électrostatique multi-zones
US7488375B1 (en) * 2007-10-23 2009-02-10 Inventec Corporation Fan cooling system
EP2397227A1 (fr) * 2010-06-18 2011-12-21 Alstom Technology Ltd Procédé pour contrôler la distorsion de ligne dans un système d'alimentations électriques de dépoussiéreurs électriques

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507096A (en) * 1967-03-07 1970-04-21 Cottrell Res Inc Method and apparatus for automatic voltage control of electrostatic precipitators
DE1923952A1 (de) * 1969-05-10 1970-11-19 Licentia Gmbh Regelverfahren beim elektrostatischen Abscheiden von Aerosol mit einem Elektrofilter,insbesondere fuer Abgasentstaubung
DE2234046A1 (de) * 1971-07-12 1973-02-01 Envirotech Corp Steuerschaltung fuer die energiezufuhr bei elektrischen entstaubern
DE2357017A1 (de) * 1972-11-16 1974-05-30 Lodge Cottrell Ltd Automatischer spannungsregler
DE2317256A1 (de) * 1973-04-06 1974-10-31 Licentia Gmbh Steuer- und regeleinrichtung fuer eine anlage zum abscheiden von aerosolen mit einem elektroabscheider
US3877896A (en) * 1973-08-14 1975-04-15 Vectrol Inc Solid state voltage control system for electrostatic precipitators
US3893828A (en) * 1973-06-11 1975-07-08 Wahlco Inc Electrostatic precipitator central monitor and control system
US4152124A (en) * 1976-08-13 1979-05-01 General Electric Company Automatic control system for electric precipitators
EP0030320A1 (fr) * 1979-12-11 1981-06-17 Metallgesellschaft Ag Procédé d'enregistrement de décharges dans un filtre électrostatique
EP0030657A1 (fr) * 1979-12-11 1981-06-24 Metallgesellschaft Ag Procédé pour porter automatiquement la tension d'un électrofiltre à la limite de décharge et appareil pour la mise en oeuvre du procédé
EP0031056A1 (fr) * 1979-12-11 1981-07-01 Metallgesellschaft Ag Procédé pour déterminer la limite du courant de filtre d'un électrofiltre

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US3622839A (en) * 1970-01-19 1971-11-23 Robicon Corp Control system for electrostatic precipitator power supply
JPS5344068B2 (fr) * 1972-11-25 1978-11-25
GB1556264A (en) * 1976-12-15 1979-11-21 Lodge Cottrell Ltd Analogue automatic voltage controller
JPS5393482A (en) * 1977-01-28 1978-08-16 Origin Electric Operation method of electric dust collector
US4290003A (en) * 1979-04-26 1981-09-15 Belco Pollution Control Corporation High voltage control of an electrostatic precipitator system
US4267502A (en) * 1979-05-23 1981-05-12 Envirotech Corporation Precipitator voltage control system
US4326860A (en) * 1980-11-28 1982-04-27 Nwl Transformers Ripple insensitive electric precipitator

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507096A (en) * 1967-03-07 1970-04-21 Cottrell Res Inc Method and apparatus for automatic voltage control of electrostatic precipitators
DE1923952A1 (de) * 1969-05-10 1970-11-19 Licentia Gmbh Regelverfahren beim elektrostatischen Abscheiden von Aerosol mit einem Elektrofilter,insbesondere fuer Abgasentstaubung
DE2234046A1 (de) * 1971-07-12 1973-02-01 Envirotech Corp Steuerschaltung fuer die energiezufuhr bei elektrischen entstaubern
FR2146007A5 (fr) * 1971-07-12 1973-02-23 Envirotech Corp
US3959715A (en) * 1972-11-16 1976-05-25 Dresser Industries, Inc. Automatic controller for electrostatic precipitator
DE2357017A1 (de) * 1972-11-16 1974-05-30 Lodge Cottrell Ltd Automatischer spannungsregler
DE2317256A1 (de) * 1973-04-06 1974-10-31 Licentia Gmbh Steuer- und regeleinrichtung fuer eine anlage zum abscheiden von aerosolen mit einem elektroabscheider
US3893828A (en) * 1973-06-11 1975-07-08 Wahlco Inc Electrostatic precipitator central monitor and control system
US3877896A (en) * 1973-08-14 1975-04-15 Vectrol Inc Solid state voltage control system for electrostatic precipitators
US4152124A (en) * 1976-08-13 1979-05-01 General Electric Company Automatic control system for electric precipitators
EP0030320A1 (fr) * 1979-12-11 1981-06-17 Metallgesellschaft Ag Procédé d'enregistrement de décharges dans un filtre électrostatique
EP0030657A1 (fr) * 1979-12-11 1981-06-24 Metallgesellschaft Ag Procédé pour porter automatiquement la tension d'un électrofiltre à la limite de décharge et appareil pour la mise en oeuvre du procédé
EP0031056A1 (fr) * 1979-12-11 1981-07-01 Metallgesellschaft Ag Procédé pour déterminer la limite du courant de filtre d'un électrofiltre

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071592A2 (fr) * 1981-07-28 1983-02-09 Fläkt Aktiebolag Dispositif de commande pour un séparateur électrostatique de poussière
EP0071592A3 (en) * 1981-07-28 1984-04-18 Flakt Aktiebolag Control device for an electrostatic dust separator
EP0186338A2 (fr) * 1984-12-12 1986-07-02 F.L. Smidth & Co. A/S Procédé de commande de la fréquence de pulsation pour un précipitateur électrostatique fonctionnant à pulsations
EP0186338A3 (en) * 1984-12-12 1987-06-03 F.L. Smidth & Co. A/S Method of controlling the pulse frequency of a pulse operated electrostatic precipitator
DE4142501C1 (fr) * 1991-12-21 1992-12-10 Metallgesellschaft Ag, 6000 Frankfurt, De
EP0549007A1 (fr) * 1991-12-21 1993-06-30 METALLGESELLSCHAFT Aktiengesellschaft Procédé pour déterminer la tension à atteindre UZF après une décharge dans séparateur électrostatique
AT406345B (de) * 1992-07-04 2000-04-25 Rothemuehle Brandt Kritzler Verfahren zum betrieb eines elektrofilters sowie elektrofilter zur ausübung des verfahrens
WO1997035666A1 (fr) * 1996-03-28 1997-10-02 ABB Fläkt Aktiebolag Technique de commande d'un precipitateur electrostatique
EP2873464A1 (fr) * 2013-11-13 2015-05-20 Siemens VAI Metals Technologies GmbH Filtration d'un gaz d'échappement, présentant des particules solides, d'une installation technique sidérurgique
WO2015071151A1 (fr) * 2013-11-13 2015-05-21 Siemens Vai Metals Technologies Gmbh Filtration d'un gaz d'échappement, comportant des particules de matières solides, d'une installation métallurgique
CN105992651A (zh) * 2013-11-13 2016-10-05 首要金属科技奥地利有限责任公司 冶炼技术设备的具有固体颗粒的废气的过滤

Also Published As

Publication number Publication date
EP0039817B1 (fr) 1984-08-08
JPS574245A (en) 1982-01-09
AU7024481A (en) 1981-11-12
ZA813032B (en) 1982-05-26
AU534688B2 (en) 1984-02-09
US4432061A (en) 1984-02-14
DE3017685A1 (de) 1981-11-12
DE3165352D1 (en) 1984-09-13
ATE8849T1 (de) 1984-08-15

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