EP0030320B1 - Verfahren zum Erfassen von Durchschlägen bei einem Elektrofilter - Google Patents

Verfahren zum Erfassen von Durchschlägen bei einem Elektrofilter Download PDF

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Publication number
EP0030320B1
EP0030320B1 EP80107358A EP80107358A EP0030320B1 EP 0030320 B1 EP0030320 B1 EP 0030320B1 EP 80107358 A EP80107358 A EP 80107358A EP 80107358 A EP80107358 A EP 80107358A EP 0030320 B1 EP0030320 B1 EP 0030320B1
Authority
EP
European Patent Office
Prior art keywords
voltage
criterion
current
filter
values
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.)
Expired
Application number
EP80107358A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0030320A1 (de
Inventor
Helmut Dipl.-Ing. Herklotz
Franz Dipl.-Ing. Neulinger
Horst Dr. Dipl.-Ing. Daar
Günter Mehler
Helmut Dipl.-Ing. Schummer
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 AT80107358T priority Critical patent/ATE4373T1/de
Publication of EP0030320A1 publication Critical patent/EP0030320A1/de
Application granted granted Critical
Publication of EP0030320B1 publication Critical patent/EP0030320B1/de
Expired legal-status Critical Current

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Classifications

    • 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 detecting breakdowns in an electrostatic filter, which is fed via a rectifier, a high-voltage transformer and an actuator from an AC voltage network and in which the breakdown criterion is the exceeding of a predetermined differential voltage value of individual measured values of the same phase position of successive half-waves of the filter voltage.
  • This generic term refers to a method as is known for example from DE-A-25 40 084.
  • a method for detecting the breakdown on the high-voltage side can, for. B. consist of the fact that the voltage amplitudes of successive half-waves of the fluctuations in the voltage at the separator are continuously compared with one another and a predetermined deviation of assigned measured values serves as a criterion for a breakdown.
  • the object of the present invention is to ensure immediate detection of a breakdown in the entire possible filter voltage range.
  • the permissible differential voltage value is specified as a percentage of the filter voltage measured in each case. In this way you have a comparison standard at any time, which is adapted to the respective operating conditions and can therefore immediately decide whether there is a breakdown or not.
  • the peak values of the half-waves are additionally stored in each period of the primary current and compared with the assigned peak values in the following network period.
  • exceeding a peak current difference proportional to the peak current value serves as a breakdown criterion.
  • the drop below a predetermined minimum voltage in the filter also serves as a breakdown criterion.
  • this criterion - without the voltage comparison criterion mentioned at the beginning - can serve as an indication of a fault in the system.
  • the calculations and storage of the measured values required for calculating the breakdown detection are advantageously carried out digitally, with the aid of a microcomputer system.
  • An electrostatic filter 1 is fed via a high-voltage rectifier 2 and a high-voltage transformer 3 from an AC network 5.
  • a thyristor actuator 4 is provided which is controlled by a digital controller 6. This digital controller forms the necessary control signals for the thyristor actuator 4 from current and voltage-dependent values in conjunction with the breakdowns.
  • Breakthrough processing in controller 6 is initiated via gate 79 if
  • Breakthrough detection is suspended for the duration of the remaining half-wave.
  • the primary current I P is rectified with a rectifier8 and the peak values I P (N) and I P (N + 1) of a half-wave and the following half-wave are stored and with the corresponding values Ip (N + 2), I P (N + 3) of the following network period compared. This results in the determination of the following current differences at the comparison stage 73 connected to the memories 71 and 72.
  • Each of the two peak value differences is compared with a limit value, which is calculated according to the following relationship: where X i is the permissible deviation of the primary current peak value. Breakthrough processing is triggered when or
  • This type of breakthrough detection is suspended during the first half-wave after a breakdown and during a run-up phase after a breakdown with several subsequent breaks.
  • the signal of the comparator 73 also goes via the gate 79 to the digital controller 6.
  • the storage and sampling and the comparison of the individual current measured values is also indicated by the switch 77 actuated by the control unit (not shown).
  • the breakthrough processing is also initiated if the detection has not been achieved according to the above two criteria, z. B. because of a fault in a converter module.
  • This microcomputer system essentially consists of a central unit 91, the actual arithmetic and control unit, the memory 92 and the input and output devices 93, all of which are connected to a common bus 94.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Testing Relating To Insulation (AREA)
  • Electrostatic Separation (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Protection Of Static Devices (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP80107358A 1979-12-11 1980-11-25 Verfahren zum Erfassen von Durchschlägen bei einem Elektrofilter Expired EP0030320B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107358T ATE4373T1 (de) 1979-12-11 1980-11-25 Verfahren zum erfassen von durchschlaegen bei einem elektrofilter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792949752 DE2949752A1 (de) 1979-12-11 1979-12-11 Verfahren zum erfassen von durchschlaegen bei einem elektrofilter
DE2949752 1979-12-11

Publications (2)

Publication Number Publication Date
EP0030320A1 EP0030320A1 (de) 1981-06-17
EP0030320B1 true EP0030320B1 (de) 1983-08-03

Family

ID=6088125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107358A Expired EP0030320B1 (de) 1979-12-11 1980-11-25 Verfahren zum Erfassen von Durchschlägen bei einem Elektrofilter

Country Status (7)

Country Link
US (1) US4433281A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0030320B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS56124461A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE4373T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU535223B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE2949752A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ZA (1) ZA807727B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343563A1 (de) * 1983-12-01 1985-06-13 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zum erfassen von durchschlaegen bei einem elektrofilter

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017685A1 (de) * 1980-05-08 1981-11-12 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zum regeln der spannung eines in einer anlage eingesetzten elektrofilters
WO1983000297A1 (en) * 1981-07-24 1983-02-03 Rodney John Truce Detecting, measuring and applying back corona parameters on an electrostatic precipitator
SE8104574L (sv) * 1981-07-28 1983-01-29 Svenska Flaektfabriken Ab Styranordning for en elektrostatisk stoftavskiljare
JPS6125650A (ja) * 1984-07-17 1986-02-04 Sumitomo Heavy Ind Ltd 電気集塵装置の荷電制御方法
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
US5378978A (en) * 1993-04-02 1995-01-03 Belco Technologies Corp. System for controlling an electrostatic precipitator using digital signal processing
US7357828B2 (en) * 2006-07-17 2008-04-15 Oreck Holdings Llc Air cleaner including constant current power supply
PL3154702T3 (pl) * 2014-06-13 2021-12-13 Flsmidth A/S Sterowanie zasilaczem wysokonapięciowym elektrofiltra
US10882053B2 (en) 2016-06-14 2021-01-05 Agentis Air Llc Electrostatic air filter
US20170354980A1 (en) 2016-06-14 2017-12-14 Pacific Air Filtration Holdings, LLC Collecting electrode
US10828646B2 (en) 2016-07-18 2020-11-10 Agentis Air Llc Electrostatic air filter
US20200188931A1 (en) * 2018-12-13 2020-06-18 Pacific Air Filtration Holdings, LLC Electronic device with advanced control features
US10875034B2 (en) 2018-12-13 2020-12-29 Agentis Air Llc Electrostatic precipitator
US10792673B2 (en) 2018-12-13 2020-10-06 Agentis Air Llc Electrostatic air cleaner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2540084A1 (de) * 1975-09-09 1977-03-17 Siemens Ag Einrichtung zum hochspannungsseitigen erfassen von ueberschlaegen bei einem elektroabscheider

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1374149A (fr) * 1963-11-12 1964-10-02 Améliorations de la régulation automatique de voltage dans des filtres électrostatiques

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2540084A1 (de) * 1975-09-09 1977-03-17 Siemens Ag Einrichtung zum hochspannungsseitigen erfassen von ueberschlaegen bei einem elektroabscheider

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343563A1 (de) * 1983-12-01 1985-06-13 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zum erfassen von durchschlaegen bei einem elektrofilter

Also Published As

Publication number Publication date
DE3064502D1 (en) 1983-09-08
ZA807727B (en) 1981-12-30
JPS56124461A (en) 1981-09-30
DE2949752A1 (de) 1981-06-19
AU6522580A (en) 1981-06-18
ATE4373T1 (de) 1983-08-15
JPS618745B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1986-03-17
US4433281A (en) 1984-02-21
AU535223B2 (en) 1984-03-08
EP0030320A1 (de) 1981-06-17

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