EP3440471A1 - Vorrichtung und verfahren zur lokalisierung von überschlägen in kunststoff-nasselektrofiltern - Google Patents
Vorrichtung und verfahren zur lokalisierung von überschlägen in kunststoff-nasselektrofilternInfo
- Publication number
- EP3440471A1 EP3440471A1 EP17728148.2A EP17728148A EP3440471A1 EP 3440471 A1 EP3440471 A1 EP 3440471A1 EP 17728148 A EP17728148 A EP 17728148A EP 3440471 A1 EP3440471 A1 EP 3440471A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output signal
- plastic wet
- current
- measuring
- wet electrostatic
- 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.)
- Withdrawn
Links
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
- B03C3/02—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
- B03C3/40—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
- 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
- B03C3/72—Emergency control systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/44—Testing lamps
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
- B03C2201/10—Ionising electrode with two or more serrated ends or sides
-
- 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
- B03C2201/24—Details of magnetic or electrostatic separation for measuring or calculating of parameters, e.g. efficiency
-
- 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 measuring and evaluation device for continuous, contactless DC measurement of leakage currents in plastic wet electrostatic precipitators.
- the invention also relates to a method for continuous, contactless measurement and evaluation of leakage currents in plastic wet electrostatic precipitators
- a measuring and evaluation device is an electronic circuit including an evaluation unit for archiving and evaluation of the measured operating currents, by which the current distribution is monitored and disturbances are signaled and a frequency distribution of the locality of the filter discharges in the filter is estimated.
- FIG. 4 shows the functional principle of an electrostatic precipitator.
- the gas to be purified (represented here by neutral ionized gas molecules 105) passes through the regions formed by the spray electrode 3 and the precipitation electrode 2.
- An electrical field is generated with a normally high negative voltage through a high-voltage rectifier device 5 (step A).
- step A When the corona initial voltage is exceeded, the corona discharge begins, through which electrons 103 (negative charge carriers) are released. The generated
- Electrons 103 migrate due to the electric field to
- the likewise negatively charged particles 104 likewise migrate to the collecting electrode 2 (step C).
- the separated particles 104 While in dry electrostatic precipitators the separated particles 104 are cyclically cleaned by mechanical cleaning (knocking), in the wet electrostatic precipitator the separated particles 104 flow in liquid into the funnels of the filter.
- plastic wet electrostatic precipitators are increasingly being used, as shown in cross-section in FIG.
- the housing 1 and the low ⁇ impact electrodes 2 of the plastic wet electrostatic filter exist for acid resistance of plastic (eg PVC, PP).
- materials such as nickel-based alloys or lead are used.
- the sputtering electrode system is suspended in isolation via spill insulators 4 and is powered by a high voltage rectifier device 5, typically with negative high voltage (DC).
- a high voltage rectifier device 5 typically with negative high voltage (DC).
- DC negative high voltage
- an electrical contacting of graphite strips / graphite contact surfaces 6 or acid-resistant metals is carried out at the upper and lower ends of the tubes or honeycombs.
- the electrical connection of the precipitation selectors is effected by individual earth leads 7 led out of the filter housing and connected to an equipotential bonding rail 8 of the external grounding system.
- WO 01/08804 A1 describes such a wet electrode filter, which are typically used in the chemical industry.
- the high-voltage rectifier feeds the spraying system with the maximum possible voltage or maximum possible current.
- a breakdown occurs (arc ignition). Punctures must be detected si ⁇ cher by the control of the high-voltage rectifier device and the power supply to extinguish the Lichtbo- immediately be interrupted.
- Punches are the electrical signals of the high voltage generator evaluated (voltage drop secondary voltage, current increase secondary current / primary current, increase the current flow time). Each breakdown produces electrical equalization that causes high frequency current / voltage spikes on the ground conductors and terminals. To limit discharges within the earthing system, all connections (lines, contact surfaces) with the largest possible surface area should be made.
- the sum electrical resistance is drastically increased from the location of the arc ignition to the external ground terminal by defective earth connections of the collecting electrodes, by dry areas on the tubes / honeycomb or redu ced ⁇ conductance of the liquid film.
- the current distribution of the electrode system and thus usually the separation efficiency are negatively affected.
- Far more critical is that at very high sum resistance the ignition of the arc to any evaluable change in the curve and thus the evaluation option for secondary voltage / secondary current / primary current / ignition angle are given.
- the arc is therefore not recognized by the control of the high voltage generator. Unmatched and not immediately extinguished arcs lead to the thermal destruction of the collecting electrodes and housing up to the fire and thus to partially considerable damage and downtime.
- the object of the invention is to provide a measuring and evaluation device, which is a continuous, contactless
- Wet electrostatic precipitators can also close on the local location of short circuits within the plastic wet electrostatic precipitator. Furthermore, it is an object of the invention analogous to the device to provide a method for continuous, non-contact measurement and evaluation of leakage currents in plastic wet electrostatic precipitators.
- a measuring and evaluation device for continuous, contactless, galvanically isolated direct current measurement of the operating currents of plastic wet electrostatic precipitators comprising a measuring device with an electronic current transformer, an electronic circuit and an isolating amplifier a potential-separated analog output signal of the Operating current of the plastic wet electrostatic filter between the low ⁇ impact electrode and the ground terminal ready provides.
- a control device for signal processing of the output signal comprises the signal mean values of the output signals ⁇ forms and records the waveforms with triggering with filter punch and the individual short circuit currents ⁇ calculated.
- a computer evaluation unit coupled via PROFIBUS is included, by means of which the average values of the operating currents as well as the measured data of the high-voltage generator are continuously archived and monitored. Deviations in the time course of the individual operating currents or differences to the total current are recorded and reported. The transmitted values of the short-circuit currents in the event of a filter breakdown are also archived and evaluated in this way. tet that a statistical frequency distribution of ⁇ rt ⁇ probability of filter punches are reproduced. The ar ⁇ chiv convinced measuring data is visualized through integrated, scalable trend displays. A multi-channel oscilloscope is integrated for the display of the individual, analog measuring signals.
- the measuring device according to the invention for continuous, contactless direct current measurement is shown in FIG.
- an insulating housing mounted an electronic, galvanic ⁇ cally separate current transformer 13, whose opening 20mm 0 permits the performance of a conductor having sufficient cross-section / surface, a high insulating ability, a small offset drift as well as sufficient bandwidth (> 5 kHz) over the measuring range (eg 0-lOOOmA).
- the measuring system also consists of an electronic circuit for power supply and signal conditioning, a buffer amplifier for the provision of a 4-20mA analog signal.
- In addition to the housing connecting rails are provided, which serve to connect the measuring device between ground terminal collecting electrode (implementation) and He ⁇ system and a bridging set.
- the present invention proposes a measuring device, the signals provided by the filter operating current measurements processed by a hardware / software solution 11 and 12 such that all filter operating currents and the seconding ⁇ därstrom of the high voltage rectifier device are continuously analyzed and archived.
- the current distribution of the individual ground lines differs from ground to ground, both during operation and without process gas.
- gas variables affect how the gas ⁇ airfoil (type of incident flow, gas distribution, type of exhaust pipe), wetting of the precipitation tubes, conductivity of the deposited medium or conductance of continuous loading nebelung, conductivity of the rinse water for operation shortly after the Rinsing, load condition and gas conditions, degree of soiling of the electrodes and execution / state of the internal earthing of the collecting electrodes themselves.
- a normal, typical current distribution can be determined and parameterized during commissioning, for example. If the current distribution is independent of the load condition or the gas conditions, the trend values of the earth currents are monitored with a predefinable minimum value, whereby an error message is output in case of deviation. For example, this may indicate the failure of ground current measurement at ⁇ 4mA.
- a measured current> 4mA but less than the predetermined minimum value may be an indication of a changed current distribution: If, in a concurrent over- review of the breakdown behavior found that allocated for this earth current increases punches ⁇ to, this indicates errors during filter grounding or mechanical fault. Furthermore, the total current of the high voltage rectifier can be compared with the sum of the earth currents. If there is a reduction in the earth's total current compared to the total current HV plant, this could provide an indication of possibly existing leakage currents outside the field.
- the typical power distribution for example, when commissioning ⁇ setting after rinsing are recorded for a reference measurement to dividing up the percentage of each ground currents to be measured.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electrostatic Separation (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016210241 | 2016-06-09 | ||
| DE102017201870.4A DE102017201870A1 (de) | 2016-06-09 | 2017-02-07 | Mess- und Auswerteeinrichtung zur kontinuierlichen, kontaktlosen Gleichstrommessung von Ableitströmen bei Kunststoff-Nasselektrofiltern zur Detektion von Kurzschlussströmen |
| PCT/EP2017/063239 WO2017211658A1 (de) | 2016-06-09 | 2017-06-01 | Vorrichtung und verfahren zur lokalisierung von überschlägen in kunststoff-nasselektrofiltern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3440471A1 true EP3440471A1 (de) | 2019-02-13 |
Family
ID=60419944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17728148.2A Withdrawn EP3440471A1 (de) | 2016-06-09 | 2017-06-01 | Vorrichtung und verfahren zur lokalisierung von überschlägen in kunststoff-nasselektrofiltern |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3440471A1 (de) |
| DE (1) | DE102017201870A1 (de) |
| WO (1) | WO2017211658A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120754987B (zh) * | 2025-09-05 | 2025-11-28 | 国网江西省电力有限公司电力科学研究院 | 一种电除尘优化控制方法及系统 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1237763A (en) * | 1983-07-25 | 1988-06-07 | Frank Gallo | Modulated power supply for an electrostatic precipitator |
| IT1247337B (it) * | 1991-04-12 | 1994-12-12 | Ente Naz Energia Elettrica | Alimentatore protetto del tipo a commutazione ad alta frequenza, in particolare per precipitatori elettrostatici |
| US5689177A (en) * | 1996-01-11 | 1997-11-18 | The Babcock & Wilcox Company | Method and apparatus to regulate a voltage controller |
| DE19946283C1 (de) | 1999-07-31 | 2000-09-28 | Metallgesellschaft Ag | Erdleiter für Erdungsanlagen |
| DE10328586A1 (de) * | 2003-06-25 | 2005-01-20 | Siemens Ag | Elektrostatisches Filter mit Durchschlagerkennung |
| US7452403B2 (en) * | 2005-12-29 | 2008-11-18 | General Electric Company | System and method for applying partial discharge analysis for electrostatic precipitator |
| DE102007056704B3 (de) * | 2007-11-24 | 2009-04-23 | Robert Bosch Gmbh | Elektrostatischer Abscheider und Verfahren zur Bestimmung eines Zustandes eines mit elektrischer Energie betriebenen elektrostatischen Abscheiders |
| US8216341B2 (en) * | 2008-11-12 | 2012-07-10 | Babcock & Wilcox Power Generation Group, Inc. | System and method for locating sparks in electrostatic precipitators |
| DE102011110057A1 (de) * | 2011-08-12 | 2013-02-14 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Verfahren zum Regeln einer Ionisationseinrichtung von einer Abgasnachbehandlungsvorrichtung |
| US10245595B2 (en) * | 2014-06-13 | 2019-04-02 | Flsmidth A/S | Controlling a high voltage power supply for an electrostatic precipitator |
-
2017
- 2017-02-07 DE DE102017201870.4A patent/DE102017201870A1/de not_active Ceased
- 2017-06-01 WO PCT/EP2017/063239 patent/WO2017211658A1/de not_active Ceased
- 2017-06-01 EP EP17728148.2A patent/EP3440471A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017201870A1 (de) | 2017-12-14 |
| WO2017211658A1 (de) | 2017-12-14 |
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