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EP0039816A1 - Process for the continuous optimisation of the electrical work point in a wet electrostatic filter - Google Patents

Process for the continuous optimisation of the electrical work point in a wet electrostatic filter Download PDF

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Publication number
EP0039816A1
EP0039816A1 EP81103147A EP81103147A EP0039816A1 EP 0039816 A1 EP0039816 A1 EP 0039816A1 EP 81103147 A EP81103147 A EP 81103147A EP 81103147 A EP81103147 A EP 81103147A EP 0039816 A1 EP0039816 A1 EP 0039816A1
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EP
European Patent Office
Prior art keywords
filter
voltage
mean value
electrical
actuator
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
EP81103147A
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German (de)
French (fr)
Other versions
EP0039816B1 (en
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
Siemens Corp
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Metallgesellschaft AG
Siemens AG
Siemens Corp
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Priority to AT81103147T priority Critical patent/ATE8586T1/en
Publication of EP0039816A1 publication Critical patent/EP0039816A1/en
Application granted granted Critical
Publication of EP0039816B1 publication Critical patent/EP0039816B1/en
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
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/16—Plant or installations having external electricity supply wet type
    • 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

Definitions

  • the invention relates to a method for the continuous optimization of the electrical operating point of an electrostatic wet filter, which is connected to an AC network via an electrical actuator.
  • Electrostatic separators for cleaning gases have been known for a long time.
  • the voltage at the filter is regulated in such a way that a predetermined filter current and / or a predetermined flashover frequency is established.
  • Such wet filters are regulated to constant filter current today.
  • This predetermined filter current value can lead to an optimal electrical operating point of the filter when the filter is set;
  • the object of the present invention is to provide a method with which the electrical operating point of the wet filter can be continuously optimized.
  • control of the actuator is iteratively changed automatically at predetermined time intervals until the mean value of the measured filter DC voltage is in the range of the attainable maximum of this mean value.
  • the percentage can be changed automatically depending on the measured dust load of the clean gas and / or the electrical power consumed.
  • an AC network N feeds a high-voltage rectifier 3 via a controllable thyristor actuator 1 and a high-voltage transformer 2, which supplies the required DC voltage for the electrostatic filter 4 designed as a wet filter.
  • the control voltage U st for the tax rate 5 of the actuator 1 is now selected so that a predetermined value of the average DC filter voltage results.
  • a value proportional to the filter direct voltage U F is taken from the filter 4 in a known manner and fed to an averager 8.
  • This value U Fm together with a setpoint value of the DC filter voltage U FR stored in the memory 12, is applied to a regulator 6 which controls the control voltage U st for the tax rate 5 forms.
  • the setpoint U FRI ie the operating point at which the filter operates, is formed in the following manner.
  • the control voltage U st is continuously increased by a timer 7, which acts on the controller 6, starting from a relatively low value U o of the filter voltage. If curve I in FIG.
  • the new maximum value U ' FM is again determined, starting from a relatively low value of the modulation, and reduced by a certain factor as the new target value U FR made available to controller 6.
  • a value proportional to the filter direct current I F - line 14 - is also limited to the limitation of the Given controller 6.
  • the output signal of the controller 6 is then limited so that the current does not increase any further.
  • the reduction factor in the link 11 is not chosen to be fixed, but is changed as a function of the dust load and / or the electrical power consumed.
  • a multiplication element 13 can be provided, which forms a value from the mean DC filter voltage and the filter current and sets the reduction factor in the reduction element 11 in accordance with this value.
  • the reduction factor can also be changed as a function of the clean gas dust loading detected by a measuring device 15.
  • the search algorithm for finding the voltage maximum can also be changed somewhat, in such a way that the search is not carried out from a relatively low value of the filter voltage, but rather the change in the mean value of the filter voltage and the number of breakdowns in successive ones Search periods of, for example, 2 seconds can be compared with one another.
  • the control voltage U st is automatically reduced by a predetermined amount if: K (N + 1)> K (N) and U F (N + 1)> U Fm (N); otherwise the control voltage U st is increased by a predetermined amount. This keeps a working point close to the maximum voltage.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Filtering Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1. A process for continuously optimising the electric working point of an electro-static wet filter (4) connected to an alternating current network (N apprch) by means of an electric setting element (1), characterised in that at pre-determined time intervals the control of the setting element (1) is automatically modified in an interative manner until the mean value of the measured direct filter voltage (UFm ) lies at the achievable maximum of this mean value, that an operating point is determined therefrom, wherein the mean value of the direct filter voltage (UFR ) lies a predetermined percentage below the voltage maximum (UFM ) - when the direct filter current (JF ) is increased compared with this operating state - and that this percentage is automatically changed in dependence upon the measured dust loading of the pure gas and/or the absorbed electric power of the filter (4).

Description

Die Erfindung bezieht sich auf ein Verfahren zur fortlaufenden Optimierung des elektrischen Arbeitspunktes eines elektrostatischen Naßfilters, das über ein elektrisches Stellglied an ein Wechselstromnetz angeschlossen ist.The invention relates to a method for the continuous optimization of the electrical operating point of an electrostatic wet filter, which is connected to an AC network via an electrical actuator.

Elektrostatische Abscheider zur Reinigung von Gasen sind bereits seit längerer Zeit bekannt. Hierbei wird im Regelfall die Spannung am Filter so geregelt, daß sich ein vorgegebener Filterstrom und/oder eine vorgegebene Überschlagshäufigkeit einstellt.Electrostatic separators for cleaning gases have been known for a long time. As a rule, the voltage at the filter is regulated in such a way that a predetermined filter current and / or a predetermined flashover frequency is established.

Einschlägige Steuerungen hierfür sind beispielsweise in der Siemens Zeitschrift 1971, Seiten 567-572 oder in der DE-AS 11 48 977 näher beschrieben.Relevant controls for this are described in more detail, for example, in Siemens magazine 1971, pages 567-572 or in DE-AS 11 48 977.

Es gibt nun elektrische Abscheider, bei denen während des Betriebs die Elektroden laufend oder zeitweise mit Wasser besprüht und zusätzlich in vorgegebenen Zeitabständen mit größeren Wassermengen gereinigt werden. Hierdurch kommt es bei diesen sog. Naßfiltern praktisch laufend zu elektrischen Überschlägen, während deren dann die Spannung am Filter einbricht.There are now electrical separators in which the electrodes are continuously or temporarily sprayed with water during operation and are additionally cleaned with larger amounts of water at predetermined intervals. This results in electrical flashovers practically continuously in these so-called wet filters, during which the voltage across the filter then drops.

Im Regelfall werden derartige Naßfilter heute auf konstanten Filterstrom geregelt. Dieser vorgegebene Filterstromwert kann bei der Einstellung des Filters zu einem optimalen elektrischen Arbeitspunkt des Filters führen;As a rule, such wet filters are regulated to constant filter current today. This predetermined filter current value can lead to an optimal electrical operating point of the filter when the filter is set;

es ist aber nicht anzunehmen, daß dieser Optimalwert erhalten bleibt, da sich die Betriebsumstände, wie z.B. die Staubbeladungsmenge des zu reinigenden Gases, die Korngröße des Staubes, die Gasmenge, die Gastemperatur und/oder die Art des Staubes ändern können.however, it cannot be assumed that this optimum value will be retained, since the operating circumstances, e.g. can change the amount of dust in the gas to be cleaned, the particle size of the dust, the amount of gas, the gas temperature and / or the type of dust.

Die Aufgabe der vorliegenden Erfindung besteht darin, ein Verfahren anzugeben, mit dem der elektrische Arbeitspunkt des Naßfilters fortlaufend optimiert werden kann.The object of the present invention is to provide a method with which the electrical operating point of the wet filter can be continuously optimized.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß in vorgegebenen Zeitabständen die Aussteuerung des Stellgliedes auf iterativem Wege selbsttätig so lange verändert wird, bis der Mittelwert der gemessenen Filtergleichspannung im Bereich des erreichbaren.Maximums dieses Mittelwertes liegt. Ein alternatives Verfahren ist im Anspruch 4 beschrieben.This object is achieved in that the control of the actuator is iteratively changed automatically at predetermined time intervals until the mean value of the measured filter DC voltage is in the range of the attainable maximum of this mean value. An alternative method is described in claim 4.

Hierbei wird von der Überlegung ausgegangen, daß bei einem Naßfilter infolge der Spannungszusammenbrüche durch Überschläge der über einen Zeitraum von z.B. 5 Sekunden gemittelte Wert der Filtergleichspannung ein Maximum hat, ab dem dieser Wert trotz weiterer Aussteuerung des Stellgliedes wieder sinkt und dabei der Filterstrom weiter ansteigt. Da für eine ausreichende Abscheidung Filterstrom und Filterspannung vorhanden sein müssen, liegt im Bereich des Maximums des Mittelwertes der Filtergleichspannung der beste Abscheidungswirkungsgrad. Genauere Untersuchungen haben dabei ergeben, daß der als Arbeitspunkt dienende Mittelwert der Filtergleichspannung um einen vorgegebenen Prozentsatz unterhalb des Spannungsmaximums -- bei gegenüber diesem Betriebszustand erhöhten Filtergleichstrom - liegen sollte, da hier noch ausreichende Spannungen mit verhältnismäßig großen Strömen zusammentreffen.This is based on the consideration that in the case of a wet filter, due to the voltage breakdowns caused by flashovers, the over a period of e.g. 5 seconds mean value of the filter DC voltage has a maximum, from which this value drops again despite further actuation of the actuator and the filter current increases further. Since the filter current and filter voltage must be available for adequate separation, the best separation efficiency lies in the range of the maximum of the mean value of the filter DC voltage. More detailed investigations have shown that the mean value of the DC filter voltage serving as the operating point should be a predetermined percentage below the maximum voltage - with an increased filter DC current compared to this operating state - since sufficient voltages still coincide with relatively large currents.

Der Prozentsatz kann dabei selbsttätig abhängig von der gemessenen Staubbeladung des Reingases und/oder der aufgenommenen elektrischen Leistung zusätzlich verändert werden.The percentage can be changed automatically depending on the measured dust load of the clean gas and / or the electrical power consumed.

Aufgrund des vorstehend beschriebenen Regelverfahrens ist weitgehend gesichert, daß das Filter zumindest während des größten Teils der Betriebszeit im optimalen Arbeitspunkt arbeitet.Due to the control method described above, it is largely ensured that the filter works at the optimum operating point at least for the majority of the operating time.

Anhand eines in der Zeichnung_dargestellten Ausführungsbeispieles sei die Erfindung näher erläutert; es zeigen:

  • Figur 1 ein schematisches Schaltungsschema einer Steuerung und
  • Figur 2 mögliche Verläufe des Filtergleichstroms; aufgetragen über dem Mittelwert der Filtergleichspannung.
The invention will be explained in more detail using an exemplary embodiment shown in the drawing; show it:
  • Figure 1 is a schematic circuit diagram of a controller and
  • FIG. 2 possible courses of the filter direct current; plotted against the mean value of the filter DC voltage.

Wie aus Figur 1 ersichtlich, speist ein Wechselstromnetz N über ein steuerbares Thyristorstellglied 1 und einen Hochspannungstransformator 2 einen Hochspannungsgleichrichter 3, der die benötigte Gleichspannung für das als Naßfilter ausgebildete Elektrofilter 4 liefert. Die Steuerspannung Ust für den Steuersatz 5 des Stellgliedes 1 wird nun so gewählt, daß sich ein vorgegebener Wert der mittleren Filtergleichspannung ergibt.As can be seen from FIG. 1, an AC network N feeds a high-voltage rectifier 3 via a controllable thyristor actuator 1 and a high-voltage transformer 2, which supplies the required DC voltage for the electrostatic filter 4 designed as a wet filter. The control voltage U st for the tax rate 5 of the actuator 1 is now selected so that a predetermined value of the average DC filter voltage results.

Hierzu wird am Filter 4 in bekannter Weise ein der Filtergleichspannung UF proportionaler Wert abgenommen und einem Mittelwertbildner 8 zugeführt. Dieser bildet aus der pulsierenden und lückenden Filtergleichspannung innerhalb einer Zeitdauer von z.B. 5 Sekunden fortlaufend den Mittelwert UFm der Filtergleichspannung. Dieser Wert UFm liegt zusammen mit einem im Speicher 12 gespeicherten Sollwert der Filtergleichspannung UFR an einem Regler 6 der die Steuerspannung Ust für den Steuersatz 5 bildet. Die Bildung des Sollwertes UFRI, d.h. der Arbeitspunkt bei dem das Filter arbeitet, wird auf folgende Weise vorgenommen. Durch ein Zeitglied 7, das auf den Regler 6 wirkt, wird - ausgehend von einem relativ niedrigen Wert Uo der Filterspannung - die Steuerspannung Ust fortlaufend erhöht. Erreicht hierdurch - Kurve I in Figur 2 - der Mittelwert der Filtergleichspannung, das Maximum UFM, d.h. dUFMO, wobei mit IF der Filterstrom bezeichnet ist, dIF so wird durch die Maximalwerterfassung 9 der Speicher 10 freigegeben und übernimmt den gerade am Ausgang des Mittelwertbildners 8 anstehenden Wert UFm, der diesem Maximum UFM entspricht. Dieser Wert wird mittels eines Reduziergliedes 11 um z.B. 10% auf.den Wert UFR verringert und an den Speicher 12 als Sollwert für den Regler 6 weitergegeben. Der Regler 6 führt nun die Steuerspannung Ust in der Weise, daß dieser Sollwert möglichst erhalten bleibt.For this purpose, a value proportional to the filter direct voltage U F is taken from the filter 4 in a known manner and fed to an averager 8. This continuously forms the mean value U Fm of the filter DC voltage from the pulsating and gaping DC filter voltage within a period of, for example, 5 seconds. This value U Fm , together with a setpoint value of the DC filter voltage U FR stored in the memory 12, is applied to a regulator 6 which controls the control voltage U st for the tax rate 5 forms. The setpoint U FRI , ie the operating point at which the filter operates, is formed in the following manner. The control voltage U st is continuously increased by a timer 7, which acts on the controller 6, starting from a relatively low value U o of the filter voltage. If curve I in FIG. 2 thereby reaches the mean value of the DC filter voltage, the maximum U FM, ie dU FM O, where I F denotes the filter current, d I F, the memory 10 is released by the maximum value detection 9 and is currently taking over value U Fm present at the output of the mean value generator 8, which corresponds to this maximum U FM . This value is reduced by means of a reducing element 11 by, for example, 10% to the value U FR and passed on to the memory 12 as a setpoint for the controller 6. The controller 6 now leads the control voltage Ust in such a way that this setpoint is retained as far as possible.

Nach z.B. einem Zeitraum von 10 Minuten wird der Vorgang der Suche des optimalen Arbeitspunktes erneut wiederholt.After e.g. The process of finding the optimum working point is repeated again within a period of 10 minutes.

Sei z.B. angenommen, daß sich jetzt ein Kurvenverlauf gemäß der gestrichelt gezeichneten Kurve II in Figur 2 ergibt, so wird wiederum - ausgehend von einem relativ niedrigen Wert der Aussteuerung - der neue Maximalwert U'FM ermittelt und um einen bestimmten Faktor reduziert als neuer Sollwert UFR dem Regler 6 zur Verfügung gestellt.Assuming, for example, that there is now a curve in accordance with the dashed curve II in FIG. 2, the new maximum value U ' FM is again determined, starting from a relatively low value of the modulation, and reduced by a certain factor as the new target value U FR made available to controller 6.

Damit bei dem vorstehend beschriebenen Regelverfahren bestimmte Grenzwerte des Stromes nicht überschritten werden, wird ferner noch ein dem Filtergleichstrom IF proportionaler Wert - Leitung 14 - auf die Begrenzung des Reglers 6 gegeben. Beim Erreichen der vorgegebenen Stromgrenzen wird dann das Ausgangssignal des Reglers 6 so begrenzt, daß der Strom nicht weiter ansteigt.So that certain limit values of the current are not exceeded in the control method described above, a value proportional to the filter direct current I F - line 14 - is also limited to the limitation of the Given controller 6. When the predetermined current limits are reached, the output signal of the controller 6 is then limited so that the current does not increase any further.

Wie bereits bemerkt, kann es von Vorteil sein, wenn der Reduktionsfaktor im Glied 11 nicht fest gewählt wird, sondern abhängig von der Staubbeladung und/oder der aufgenommenen elektrischen Leistung verändert wird. Hierzu kann z.B. ein Multiplikationsglied 13 vorgesehen sein, das aus der mittleren Filtergleichspannung und dem Filterstrom einen Wert bildet und entsprechend diesem Wert den Reduktionsfaktor im Reduzierglied 11 einstellt. Wie durch die gestrichelte Leitung 16 angedeutet, kann aber auch der Reduktionsfaktor abhängig von der durch ein Meßgerät 15.erfaßten Reingasstaubbeladung verändert werden.As already noted, it can be advantageous if the reduction factor in the link 11 is not chosen to be fixed, but is changed as a function of the dust load and / or the electrical power consumed. For this, e.g. a multiplication element 13 can be provided, which forms a value from the mean DC filter voltage and the filter current and sets the reduction factor in the reduction element 11 in accordance with this value. As indicated by the dashed line 16, however, the reduction factor can also be changed as a function of the clean gas dust loading detected by a measuring device 15.

Zur Ergänzung des vorstehend beschriebenen Suchverfahrens des optimalen Arbeitspunktes wurden Funktionsbausteine in Form logischer Schaltungen und Verstärker angegeben. Im Zuge der Rechnertechnik, insbesondere dem Einsatz von_Mikroprozessoren, wird heute vorteilhafterweise die Steuerung durch eine entsprechende Mikrocomputersteuerung realisiert. In einer solchen Steuerung können dann auch noch weitere Parameter,wie Primärstrom und Durchschlagshäufigkeit, verarbeitet werden.To complement the search procedure for the optimum operating point described above, function blocks in the form of logic circuits and amplifiers were specified. In the course of computer technology, in particular the use of microprocessors, the control is advantageously implemented today by a corresponding microcomputer control. In such a control system, other parameters such as primary current and breakdown frequency can also be processed.

Im Rahmen der vorliegenden Erfindung läßt sich auch der Suchalgorithmus zur Findung des Spannungsmaximums etwas abändern, und zwar derart, daß die Suche nicht von einem relativ niedrigem Wert der Filterspannung aus vorgenommen wird, sondern die Veränderung des Mittelwertes der Filterspannung und die Zahl der Durchschläge in aufeinanderfolgenden Suchperioden von z.B. 2 sec miteinander verglichen werden. Sei z.B. angenommen, daß in der Suchperiode N die Zahl der Filterdurchschläge K (N) betrage und der Mittelwert der Filtergleichspannung UFm (N) und die entsprechenden Werte der nächsten Suchperiode N+1 K (N+1) und UFm (N+1) seien, so wird die Steuerspannung Ust selbsttätig um einen vorgegebenen Betrag erniedrigt, falls: K (N+1)>K (N) und UF (N+1)> UFm (N); im anderen Falle wird die Steuerspannung Ust um einen vorgegebenen Betrag erhöht. Damit bleibt ein Arbeitspunkt in der Nähe des Spannungsmaximums erhalten.Within the scope of the present invention, the search algorithm for finding the voltage maximum can also be changed somewhat, in such a way that the search is not carried out from a relatively low value of the filter voltage, but rather the change in the mean value of the filter voltage and the number of breakdowns in successive ones Search periods of, for example, 2 seconds can be compared with one another. For example, suppose that in the search period N the number of filter breakdowns is K (N) and the mean value of the DC filter voltage U Fm (N) and the corresponding values of the next search period N + 1 K (N + 1) and U Fm (N + 1), the control voltage U st is automatically reduced by a predetermined amount if: K (N + 1)> K (N) and U F (N + 1)> U Fm (N); otherwise the control voltage U st is increased by a predetermined amount. This keeps a working point close to the maximum voltage.

Claims (4)

1. Verfahren zur fortlaufenden Optimierung des elektrischen Arbeitspunktes eines elektrostatischen Naßfilters, das über ein elektrisches Stellglied an ein Wechselstromnetz angeschlossen ist, dadurch gekennzeichnet, daß in vorgegebenen Zeitabständen die Aussteuerung des Stellgliedes (1) auf iterativem Wege selbsttätig so lange verändert wird, bis der Mittelwert der gemessenen Filtergleichspannung (UFm) im Bereich des erreichbaren Maximums dieses Mittelwertes liegt.1. A method for the continuous optimization of the electrical operating point of an electrostatic wet filter, which is connected via an electrical actuator to an AC network, characterized in that the control of the actuator (1) is automatically changed iteratively until the mean value at predetermined intervals the measured DC filter voltage (U Fm ) is in the range of the attainable maximum of this mean value. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der als Arbeitspunkt dienende Mittelwert der Filtergleichspannung (UFR) um einen vorgegebenen-Prozentsatz unterhalb des Spannungsmaximums - bei gegenüber diesem Betriebszustand erhöhten Filtergleichstrom - liegt.2. The method according to claim 1, characterized in that the mean value of the DC filter voltage (U FR ) serving as the operating point is a predetermined percentage below the voltage maximum - with increased filter DC current compared to this operating state. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Prozentsatz abhängig von der gemessenen Staubbeladung des Reingases und/oder der aufgenommenen elektrischen Leistung des Filters selbsttätig verändert wird.3. The method according to claim 2, characterized in that the percentage is automatically changed depending on the measured dust load of the clean gas and / or the electrical power consumed by the filter. 4. Verfahren zur fortlaufenden Optimierung des elektrischen Arbeitspunktes eines elektrostatischen Naßfilters, das über ein elektrisches Stellglied an ein Wechselstromnetz angeschlossen ist, dadurch gekennzeichnet, daß Mittelwerte der Filtergleichspannung (UFm) und Zahl der.Durchschläge in aufeinanderfolgenden Suchperioden (N) miteinander verglichen werden und bei einer Zunahme der Zahl der Durchschläge und einem Absinken der mittleren Filtergleichspannung die Steuerspannung (Ust) für das Stellglied (1) selbsttätig erniedrigt und im umgekehrten Fall erhöht wird.4. A method for the continuous optimization of the electrical operating point of an electrostatic wet filter which is connected to an AC network via an electrical actuator, characterized in that mean values of the filter DC voltage (U Fm ) and number of the breakthroughs in successive search periods (N) are compared with one another and with an increase in the number of breakdowns and a decrease in the average DC filter voltage, the control voltage (U st ) for the actuator (1) is automatically reduced and increased in the opposite case.
EP81103147A 1980-05-09 1981-04-27 Process for the continuous optimisation of the electrical work point in a wet electrostatic filter Expired EP0039816B1 (en)

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Application Number Priority Date Filing Date Title
AT81103147T ATE8586T1 (en) 1980-05-09 1981-04-27 PROCEDURE FOR CONTINUOUS OPTIMIZATION OF THE ELECTRICAL WORKING POINT OF AN ELECTROSTATIC WET FILTER.

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DE19803017884 DE3017884A1 (en) 1980-05-09 1980-05-09 METHOD FOR CONTINUOUS OPTIMIZATION OF THE ELECTRICAL WORKING POINT OF AN ELECTROSTATIC WET FILTER
DE3017884 1980-05-09

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EP0039816A1 true EP0039816A1 (en) 1981-11-18
EP0039816B1 EP0039816B1 (en) 1984-07-25

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102449A3 (en) * 1982-09-08 1985-05-22 Licentia Patent-Verwaltungs-GmbH Separating function control method for an electrostatic separator, and control apparatus therefor
WO1990011132A1 (en) * 1989-03-28 1990-10-04 ABB Fläkt Aktiebolag Method for controlling the current pulse supply to an electrostatic precipitator
CN106607190A (en) * 2016-12-31 2017-05-03 区永辉 Air purifier and method
WO2018120860A1 (en) * 2016-12-31 2018-07-05 区永辉 Air purification device and method

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EP0031056A1 (en) * 1979-12-11 1981-07-01 Metallgesellschaft Ag Method of determining the filter current limit of an electrostatic filter

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Publication number Priority date Publication date Assignee Title
US2907403A (en) * 1955-03-31 1959-10-06 Western Precipitation Corp Apparatus for controlling the operation of electrical precipitators
GB956783A (en) * 1960-08-05 1964-04-29 Brandt Herbert Voltage regulation in gas purifying plant
DE1557234A1 (en) * 1967-12-18 1970-05-21 Projektierungs Konstruktions U Process and device for the automatic regulation of the voltage of electrostatic precipitator high voltage generators
DE2357017A1 (en) * 1972-11-16 1974-05-30 Lodge Cottrell Ltd AUTOMATIC VOLTAGE REGULATOR
EP0031056A1 (en) * 1979-12-11 1981-07-01 Metallgesellschaft Ag Method of determining the filter current limit of an electrostatic filter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102449A3 (en) * 1982-09-08 1985-05-22 Licentia Patent-Verwaltungs-GmbH Separating function control method for an electrostatic separator, and control apparatus therefor
WO1990011132A1 (en) * 1989-03-28 1990-10-04 ABB Fläkt Aktiebolag Method for controlling the current pulse supply to an electrostatic precipitator
CN106607190A (en) * 2016-12-31 2017-05-03 区永辉 Air purifier and method
WO2018120860A1 (en) * 2016-12-31 2018-07-05 区永辉 Air purification device and method

Also Published As

Publication number Publication date
EP0039816B1 (en) 1984-07-25
DE3165015D1 (en) 1984-08-30
DE3017884A1 (en) 1981-11-19
ATE8586T1 (en) 1984-08-15

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