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EP0030320A1 - Procédé d'enregistrement de décharges dans un filtre électrostatique - Google Patents

Procédé d'enregistrement de décharges dans un filtre électrostatique Download PDF

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Publication number
EP0030320A1
EP0030320A1 EP80107358A EP80107358A EP0030320A1 EP 0030320 A1 EP0030320 A1 EP 0030320A1 EP 80107358 A EP80107358 A EP 80107358A EP 80107358 A EP80107358 A EP 80107358A EP 0030320 A1 EP0030320 A1 EP 0030320A1
Authority
EP
European Patent Office
Prior art keywords
voltage
criterion
current
filter
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
EP80107358A
Other languages
German (de)
English (en)
Other versions
EP0030320B1 (fr
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
Siemens Corp
Original Assignee
Metallgesellschaft AG
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Metallgesellschaft AG
Priority to AT80107358T priority Critical patent/ATE4373T1/de
Publication of EP0030320A1 publication Critical patent/EP0030320A1/fr
Application granted granted Critical
Publication of EP0030320B1 publication Critical patent/EP0030320B1/fr
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-OS 25 40 084.
  • a method for detecting the breakdown on the high-voltage side can be e.g. consist in 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 arcing depends on the voltage Maximum of the half-wave occur, it can suffice in many cases according to the solution of the aforementioned DE-OS 25 40 084 if the voltage profiles are compared with each other according to the amplitude maximum.
  • individual voltage values can be recorded and stored in the falling flank of the separator voltage at predetermined times and these voltage values can each be compared with the measured voltage values of a subsequent half-wave at the corresponding times shifted by the period. If the comparison shows a considerable deviation, this can serve as a criterion for the rollover.
  • the object of the present invention is to ensure immediate detection of a breakdown in the entire possible filter voltage range.
  • the peak values of the half-waves in each period of the primary current are additionally ge stores 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.
  • the sole occurrence of 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 connected to a high voltage rectifier 2 and a high-voltage transformer 3 fed from an AC network 5.
  • a thyristor actuator 4 ′ for example, is provided in the primary circuit and is controlled by a digital regulator 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.
  • switch 77 which are actuated by a synchronization control, not shown.
  • the primary current I p is rectified with a rectifier 8 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), Ip (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
  • the breakdown processing is also initiated if the detection has not been achieved according to the above two criteria, for example: due to a fault in a converter module.
  • the sole triggering according to criterion 3, falling below the minimum voltage, just like the sole occurrence of criterion 2 - excessive primary current - represents an abnormal operating result and is additionally output via gate 10 as fault signal St.
  • 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)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Electrostatic Separation (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 Procédé d'enregistrement de décharges dans un filtre électrostatique Expired EP0030320B1 (fr)

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
DE2949752 1979-12-11
DE19792949752 DE2949752A1 (de) 1979-12-11 1979-12-11 Verfahren zum erfassen von durchschlaegen bei einem elektrofilter

Publications (2)

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

Family

ID=6088125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107358A Expired EP0030320B1 (fr) 1979-12-11 1980-11-25 Procédé d'enregistrement de décharges dans un filtre électrostatique

Country Status (7)

Country Link
US (1) US4433281A (fr)
EP (1) EP0030320B1 (fr)
JP (1) JPS56124461A (fr)
AT (1) ATE4373T1 (fr)
AU (1) AU535223B2 (fr)
DE (2) DE2949752A1 (fr)
ZA (1) ZA807727B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039817A1 (fr) * 1980-05-08 1981-11-18 Metallgesellschaft Ag Méthode de réglage de la tension d'un électrofiltre placé dans une installation
US4486704A (en) * 1981-07-28 1984-12-04 Flakt Aktiebolag Control device for an electrostatic dust separator

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3275706D1 (en) * 1981-07-24 1987-04-23 Rodney John Truce Detecting, measuring and applying back corona parameters on an electrostatic precipitator
DE3343563A1 (de) * 1983-12-01 1985-06-13 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zum erfassen von durchschlaegen bei einem elektrofilter
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
EP3154702B1 (fr) * 2014-06-13 2021-07-21 FLSmidth A/S Commande d'une alimentation haute tension pour un électrofiltre
US20170354980A1 (en) 2016-06-14 2017-12-14 Pacific Air Filtration Holdings, LLC Collecting electrode
US10882053B2 (en) 2016-06-14 2021-01-05 Agentis Air Llc Electrostatic air filter
US10828646B2 (en) 2016-07-18 2020-11-10 Agentis Air Llc Electrostatic air filter
US10792673B2 (en) 2018-12-13 2020-10-06 Agentis Air Llc Electrostatic air cleaner
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

Citations (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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2540084C2 (de) * 1975-09-09 1983-08-25 Metallgesellschaft Ag, 6000 Frankfurt Einrichtung zum hochspannungsseitigen Erfassen von Überschlägen bei einem Elektroabscheider

Patent Citations (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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0039817A1 (fr) * 1980-05-08 1981-11-18 Metallgesellschaft Ag Méthode de réglage de la tension d'un électrofiltre placé dans une installation
US4486704A (en) * 1981-07-28 1984-12-04 Flakt Aktiebolag Control device for an electrostatic dust separator

Also Published As

Publication number Publication date
AU6522580A (en) 1981-06-18
ATE4373T1 (de) 1983-08-15
DE3064502D1 (en) 1983-09-08
JPS56124461A (en) 1981-09-30
JPS618745B2 (fr) 1986-03-17
DE2949752A1 (de) 1981-06-19
AU535223B2 (en) 1984-03-08
ZA807727B (en) 1981-12-30
US4433281A (en) 1984-02-21
EP0030320B1 (fr) 1983-08-03

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