EP1604742A1 - Gas supply for electrostatic precipitator and electrostatic precipitator - Google Patents

Gas supply for electrostatic precipitator and electrostatic precipitator Download PDF

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Publication number
EP1604742A1
EP1604742A1 EP04013364A EP04013364A EP1604742A1 EP 1604742 A1 EP1604742 A1 EP 1604742A1 EP 04013364 A EP04013364 A EP 04013364A EP 04013364 A EP04013364 A EP 04013364A EP 1604742 A1 EP1604742 A1 EP 1604742A1
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EP
European Patent Office
Prior art keywords
vortex
gas supply
gas
flow
supply according
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
EP04013364A
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German (de)
French (fr)
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EP1604742B1 (en
Inventor
Thomas Davis
Stefan Leser
Michael Kaatz
Hans Ruscheweyh
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Balcke Duerr GmbH
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Balcke Duerr GmbH
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Publication date
Application filed by Balcke Duerr GmbH filed Critical Balcke Duerr GmbH
Priority to DE502004011737T priority Critical patent/DE502004011737D1/en
Priority to PL04013364T priority patent/PL1604742T3/en
Priority to AT04013364T priority patent/ATE483524T1/en
Priority to SI200431545T priority patent/SI1604742T1/en
Priority to PT04013364T priority patent/PT1604742E/en
Priority to DK04013364.7T priority patent/DK1604742T3/en
Priority to ES04013364T priority patent/ES2351980T3/en
Priority to EP04013364A priority patent/EP1604742B1/en
Priority to US10/910,638 priority patent/US6964698B1/en
Priority to CN200510007500A priority patent/CN100577301C/en
Priority to ZA200504241A priority patent/ZA200504241B/en
Priority to CA002508257A priority patent/CA2508257C/en
Priority to TW094117132A priority patent/TWI291372B/en
Priority to AU2005202330A priority patent/AU2005202330B2/en
Priority to MXPA05005879A priority patent/MXPA05005879A/en
Priority to UAA200505390A priority patent/UA80165C2/en
Priority to RU2005117219/12A priority patent/RU2298438C2/en
Priority to JP2005167283A priority patent/JP4390746B2/en
Priority to KR1020050048599A priority patent/KR100722341B1/en
Publication of EP1604742A1 publication Critical patent/EP1604742A1/en
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Publication of EP1604742B1 publication Critical patent/EP1604742B1/en
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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
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/013—Conditioning by chemical additives, e.g. with SO3
    • 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
    • B03C3/36—Controlling flow of gases or vapour

Definitions

  • the invention relates to a gas supply for an electrostatic precipitator according to the preamble of the claim 1 and an electrostatic filter device comprising an electrostatic precipitator and a gas supply.
  • Electrostatic precipitators are used, for example, in waste incineration plants, power plants or in industry in production plants with furnaces such as cement, lime, gypsum, iron or steelmaking used to difficult-to-deposit solid articles such as fine dust particles from an air, flue gas or more generally a gas flow out to filter out. This will be the gas flow passes through an electric field in which electrons released by electrodes attached to the dust particles, together with the dust particles in the direction of collecting electrodes wander and be deposited there.
  • furnaces such as cement, lime, gypsum, iron or steelmaking used to difficult-to-deposit solid articles such as fine dust particles from an air, flue gas or more generally a gas flow out to filter out.
  • an electrostatic filter For an electrostatic filter to be able to clean the gas in the greatest possible efficiency, it must be streamed or flowed through as uniformly as possible.
  • a non-optimal flow leads to an uneven distribution of dust, temperature or flow velocity in the gas flow, resulting in a reduced degree of separation and thus a non-optimal cleaning effect pulls. Also may be due to these uneven flow distributions very easily form particle deposits that gradually increase the flow area of the electrostatic precipitator reduce and lower its efficiency.
  • an electrostatic filter device usually has an upstream of the electrostatic precipitator Gas supply, which directs the gas to be filtered as evenly as possible to and into the filter.
  • the gas supply typically includes an inflow passage through which the gas flows toward the filter, and a gas inlet hood, which widens in a funnel shape from the inflow channel in the shape of a funnel toward the electrostatic filter.
  • the gas inlet hood thus has at its front in the flow direction cross-section a small cross-sectional area corresponding to that of the inflow channel, and at its in the flow direction behind lying cross-section on a large cross-sectional area, which is substantially which corresponds to the electrostatic precipitator.
  • the flow of the filter is usually in the gas supply at least one flow distributor immediately before the electrostatic precipitator in the widened region of the gas inlet hood arranged.
  • These flow distributors are usually gas distribution devices in the form of perforated sheets, often arranged in several layers one behind the other become.
  • conditioning agents are mixed into the gas stream in the gas feed with the aid of an admixing device. This is once a cooling conditioning in which water is sprayed into the gas flow to cool the gas. Often, the gas is conditioned without lowering the gas temperature by SO 3 , NH 3 , water vapor or the like, among other things, to reduce the electrical dust resistance are injected into the gas to be filtered.
  • the admixing device usually has a plurality of nozzles arranged in the gas supply.
  • the invention is therefore based on the object, the efficiency of electrostatic precipitators to improve.
  • the invention therefore initially relates to the gas supply for an electrostatic precipitator of an electrostatic precipitator device, since, according to studies of the inventor just in the field of supply of the gas to Filter particularly great potential for improvement with regard to the efficiency of the electrostatic filter device is available.
  • This is a basically known gas supply, the one Inflow channel with constant cross-sectional area, a gas inlet hood with in the direction of Electrostatic filter aufweitender cross-sectional area and an admixing device for a conditioning agent having.
  • At least one flow distributor is arranged in the expanded cross-sectional area.
  • the gas supply according to the invention now differs from the known gas supply lines in that a first vortex vortex generating vortex device in the inflow channel, a second leading edge vortex generating vortex device in the gas inlet hood in the gas flow direction in front of the flow distributor and the admixing device in the region of one of the two vortex devices is arranged.
  • These vortex devices are basically known Built-in elements, as described for example in EP 0638732 A1 already for a diffuser have been.
  • leading edge vertebrae can be as small in the flow direction introduce directed tornadoes whose diameters increase in the direction of flow. The vortex In doing so, they first turn outward from the side edges of the vortex device and roll then inward, causing opposite vortex rotate in opposite directions. Looking down the river to such a vortex device, the leading edge vertebrae see as two in opposite directions rolling snails out.
  • leading edge vertebrae have the advantage of being extremely stable vortex systems are that lead to a particularly effective mixing of the gas flow. This makes it possible that a largely uniform turbulent flow behavior behind such a vortex device forms that sets almost independent of the currently flowing gas through. Thus, such vortex devices do not have to be constantly adapted to fluctuating gas quantities become.
  • static mixers Based on these good mixing properties you have the vortex vortex generating vortex devices used in particular in diffusers to conventional baffles, baffles or perforated plates which serve to flow distribution or diversion to completely replace them.
  • the whirling devices are now also in the extremely widening here Gas inlet hood of a gas supply used for an electrostatic precipitator, but different than before not used to complete the flow-distributing components, ie flow distributor to replace, but only to improve their flow at least partially.
  • the vortex devices have due to their in the flow direction obliquely arranged arrangement in the flow direction only a very small projection area at a high Fluidizing effect, whereby the pressure losses are greatly reduced.
  • the turbulence at the same time dust strands are dissolved and distributed, so that the Dust particle distribution is made uniform.
  • due to the turbulent but evened Flow the flow distribution to the electrostatic precipitator already with a single perforated sheet layer respectively. This reduces the installation space in the gas supply, and the efficiency of the electrostatic precipitator or the electrostatic filter device is significantly increased overall, while the basically considered as favorably estimated flow of the electrostatic filter via a perforated plate can be.
  • the gas supply according to the invention is characterized in that a vortex device is arranged in the inflow channel with at least approximately constant cross-section.
  • a vortex device is arranged in the inflow channel with at least approximately constant cross-section.
  • first leading edge vortex already takes place in the tubular section with substantially parallel channel walls.
  • This arrangement is in contrast to the previous teaching that of it assumes that the vortex devices always within the widening areas of a diffuser should be arranged. It is based on a synergy effect resulting from the retention of at least a flow distributor in front of the electrostatic precipitator results.
  • the admixing device in the region of one of the two Whirling devices is arranged. So you can use the powerful leading edge vortices for effective Use admixture of a conditioning agent in the gas stream. Due to the flow direction spreading leading edge eddy systems thus results even with a punctual injection one particularly good mixing of the conditioning agent across the flow cross-section.
  • the first vortex device is expediently closer to the curvature inside the Anströmkanals than to the outside of the curvature, ie with respect to the center of the inflow channel arranged asymmetrically on the inside of the curvature. This will change the flow on the inside an increased flow energy supplied, which enables the flow, better the sharp deflection to follow the inner edge. It is thus in interaction with the second vortex device possible to achieve a nearly separation-free deflection in the filter hood, what the flow distribution clearly improved.
  • the first vortex device can be arranged at an angle in the inflow channel, that the leading edge of the gas flow facing at least one inflow in Direction of the curvature inside and the spoiler edge to the curvature outside of the inflow has.
  • the first vortex device is angled in the inflow channel the other way round arranged so that the leading edge of their gas flow facing at least one inflow surface in the direction of the curvature outside and the tear-off edge to the curvature inside of the inflow channel has.
  • the leading edge is the edge of the vortex device, that of the gas flow is facing and the tear-off edge is the edge that faces away from the flow.
  • the second vortex device in a lower region of the gas inlet hood is arranged.
  • in a vertically arranged inflow the, due to a Curvature deflected in the horizontal direction, air flow again through the second vortex device steered in a more horizontal direction.
  • the whirling device thus serves not only as a means for mixing but also as a deflection.
  • the second vortex device at an acute angle to a wall the gas inlet hood is arranged.
  • an angle of less than 45 ° and more than 0.5 ° to understand.
  • leading edge eddy system generates.
  • the admixing device opens behind the leading edge of a vortex device.
  • very simple Zumischvorraumen can be used, such as a simple pipe socket, which opens behind the leading edge of a vortex device. Due to the at the leading edge forming strong and conically widening in the flow direction Vortex, takes place so even with a just selective admixing a very good mixing of the pipe stub exiting conditioning with the gas flowing past.
  • the admixing device directly to the vortex device is appropriate.
  • a whirling device should have at least one vertebral disc.
  • There are swirl disks Well known and can be circular, elliptical, rectangular or even delta wing-shaped running be, with discs in straight or kinked embodiment or in triangular or drop-shaped cross-sectional embodiments are suitable.
  • a vortex device has a plurality of side by side in a flow cross-section arranged vertebrae on.
  • the vertebrae can be linked together or individually attached to the wall individually. Also, so can chain around the entire Cross-section are formed around vortex devices. That means that at one rectangular Anströmkanal each arranged at least one vortex disc top, bottom, left and right is.
  • a vortex device preferably has a plurality of cascading arranged vortex discs.
  • Cascading here means a functional sequence of successively arranged vertebral discs. These thus give a staircase-shaped image again, where also oblique or diagonally offset arrangements of the individual vertebrae are conceivable. The important thing is that the Gas flow is forwarded from one vortex disc to the next, with an optimal induction effect occurs.
  • a vortex device is a system of multiple vortex discs having.
  • Such a vortex plate system may for example consist of a plurality of vortex discs exist, which are arranged on a common pivot axis. So can several Vertebral discs together in a firmly defined functional relationship in their Mode of action, for example, be changed by turning or pivoting.
  • an electrostatic filter device the one Electrostatic precipitator and a gas supply according to one of the previously described embodiments and further developments having.
  • This electrostatic filter device is characterized in particular by the use of vertebral discs in the manner described above, which is already in the preceding Embodiments of the gas supply described advantages.
  • the embodiment of the electrostatic filter device 1 according to the invention shown in FIG. 1 has an electrostatic filter 2, a gas inlet 3 and a gas outlet 4.
  • the gas supply 3 is in operation of the electrostatic filter device 1 flows through a gas flow to be filtered 5, the latter from a deflects vertically in a substantially horizontal direction and directed to the filter 2.
  • in the Filter 2 is the gas stream 5 to be filtered then particles contained therein through the already above explained electrical processes released and exits via the gas outlet 4 as a filtered gas stream 6 the electrostatic filter device 1 from.
  • the gas supply 3 thus includes in the embodiment shown here a vertical inflow channel 7 with a substantially constant flow cross-section. Close to the inflow channel 7 in the main flow direction, a curvature 9 of the inflow channel. It changes the to be filtered Gas flow 5 its flow direction from a vertical to a horizontal direction.
  • the curved Anströmkanalabites 9 then follows the gas inlet hood 8, which extends in the direction of the filter 2 widens in its cross section.
  • the flow distributor 10 Immediately before the electrostatic filter 2, ie in the area the largest cross-sectional area of the gas inlet hood 8 is the flow distributor 10, in which this is a simple perforated plate.
  • a first leading edge vortex generating Whirling device 11 is arranged in the inflow channel 7 in front of the curved portion 9 .
  • the second leading edge vortex generating vortex device 12 is located in the narrow region of the gas inlet hood 8, ie in the flow direction in front of the perforated plate 10.
  • Both vortex devices are each a single one in the embodiment shown here circular vortex plate that at its gas flow side facing an inflow 13 has.
  • the inflow surface 13 in this case connects the upstream directed inflow edge 14 and the downstream tear-off edge 15.
  • the first vortex plate 11 is arranged in front of the curvature 9 so that the inflow surface 13 in the flow direction from the curvature outside 21 to the curvature inside 22 of the Curvature 9 extends.
  • the curvature outside 21 so the obliquely upstanding sheet, while the curvature inside 22 of the corner or the transition between inflow duct 7 and gas inlet hood 8 corresponds.
  • the first vortex plate 11 is arranged so that the leading edge 14 down, so directed against the gas flow to be filtered 5, and the tear-off edge 15 faces upward.
  • the inflow area 13 thus extends in the illustrated longitudinal section of the leading edge 14 obliquely upwards to the tear-off edge 15.
  • leading edge eddy system 16 extending from the leading edge 14 in the main flow direction 5 extends vertically upwards. This increases the diameter of the leading edge vertebrae 16 transverse to the main flow direction of the gas flow 5.
  • the second Whirling plate 12 where also forms a leading edge vortex system 17, wherein the leading edge vortex system 17 aligned substantially horizontally to the perforated plate 10 incoming is.
  • baffles 18 For the uniform deflection of the gas flow 5 from the vertical in the direction of the horizontal are in the gas inlet hood 8 in the upper part baffles 18 conventional curved design. They merely supplement the change in direction already generated by the whirling device 11 the gas flow and serve in particular not the swirling.
  • a pipe socket 19 is arranged, through which a conditioning agent 20 can be injected into the inflow channel. Due to the strong turbulence of Gas flow in the downstream propagating vortex 16 is thus a particularly good mixing of the gas with the conditioning agent 20, so that a complex Mehrdüsige Zumischvortechnik can be omitted. This lowers the flow resistance and the manufacturing costs and makes the Zumischvortechnisch 19 less susceptible to disturbances, for example, from dust deposits result.

Abstract

A vortex arrangement (11) that generates a leading edge vortex (16) is arranged in the incoming flow channel (7). A secondary vortex arrangement (12) that generates a separate leading edge vortex (17) is arranged in the gas inlet hood (8) ahead of the flow distributor (10) in the direction of gas flow. An admixture arrangement (19) is arranged near the vortex arrangements. An independent claim is also included for an electrostatic filter arrangement.

Description

Die Erfindung betrifft eine Gaszuführung für einen Elektrofilter gemäß dem Oberbegriff des Anspruchs 1 und eine Elektrofiltervorrichtung, die einen Elektrofilter und eine Gaszuführung aufweist.The invention relates to a gas supply for an electrostatic precipitator according to the preamble of the claim 1 and an electrostatic filter device comprising an electrostatic precipitator and a gas supply.

Elektrofilter werden unter anderem in Müllverbrennungsanlagen, Kraftwerken oder in der Industrie in Produktionsanlagen mit Feuerungen wie etwa bei der Zement, Kalk, Gips, Eisen oder Stahlherstellung verwendet, um schwierig abzuscheidende Festkörperartikel wie zum Beispiel feine Staubpartikel aus einer Luft-, Rauchgas- oder ganz allgemein einer Gasströmung heraus zu filtern. Dazu wird die Gasströmung durch ein elektrisches Feld geleitet, in dem sich von Elektroden freigesetzte Elektronen an die Staubpartikel anlagern, zusammen mit den Staubpartikeln in Richtung von Niederschlagselektroden wandern und dort abgeschieden werden.Electrostatic precipitators are used, for example, in waste incineration plants, power plants or in industry in production plants with furnaces such as cement, lime, gypsum, iron or steelmaking used to difficult-to-deposit solid articles such as fine dust particles from an air, flue gas or more generally a gas flow out to filter out. This will be the gas flow passes through an electric field in which electrons released by electrodes attached to the dust particles, together with the dust particles in the direction of collecting electrodes wander and be deposited there.

Damit ein Elektrofilter das Gas in einem größtmöglichen Wirkungsgrad reinigen kann, muss er möglichst gleichmäßig angeströmt bzw. durchströmt werden. Eine nicht optimale Anströmung führt zu einer ungleichmäßigen Verteilung des Staubs, der Temperatur oder der Strömungsgeschwindigkeit in der Gasströmung, was einen verminderten Abscheidegrad und somit eine nicht optimalen Reinigungswirkung nach sich zieht. Auch können sich aufgrund dieser ungleichmäßigen Strömungsverteilungen sehr leicht Partikelablagerungen bilden, die den Strömungsquerschnitt des Elektrofilters nach und nach verringern und seinen Wirkungsgrad absenken.For an electrostatic filter to be able to clean the gas in the greatest possible efficiency, it must be streamed or flowed through as uniformly as possible. A non-optimal flow leads to an uneven distribution of dust, temperature or flow velocity in the gas flow, resulting in a reduced degree of separation and thus a non-optimal cleaning effect pulls. Also may be due to these uneven flow distributions very easily form particle deposits that gradually increase the flow area of the electrostatic precipitator reduce and lower its efficiency.

Daher weist eine Elektrofiltervorrichtung üblicherweise eine vor dem Elektrofilter angeordnete Gaszuführung auf, die das zu filternde Gas möglichst gleichmäßig zum und in den Filter leitet. Die Gaszuführung umfasst in der Regel einen Anströmkanal, durch den das Gas in Richtung des Filters strömt, und eine sich vom Anströmkanal etwa umgekehrt trichterförmig zum Elektrofilter hin aufweitende Gaseintrittshaube. Die Gaseintrittshaube weist also an ihrem in Strömungsrichtung vorne liegenden Querschnitt eine kleine Querschnittsfläche auf, die der des Anströmkanals entspricht, und an ihrem in Strömungsrichtung hinten liegenden Querschnitt eine große Querschnittsfläche auf, die im Wesentlichen der des Elektrofilters entspricht.Therefore, an electrostatic filter device usually has an upstream of the electrostatic precipitator Gas supply, which directs the gas to be filtered as evenly as possible to and into the filter. The gas supply typically includes an inflow passage through which the gas flows toward the filter, and a gas inlet hood, which widens in a funnel shape from the inflow channel in the shape of a funnel toward the electrostatic filter. The gas inlet hood thus has at its front in the flow direction cross-section a small cross-sectional area corresponding to that of the inflow channel, and at its in the flow direction behind lying cross-section on a large cross-sectional area, which is substantially which corresponds to the electrostatic precipitator.

Um die Anströmung des Filters zu vergleichmäßigen, ist in der Gaszuführung normalerweise unmittelbar vor dem Elektrofilter im aufgeweiteten Bereich der Gaseintrittshaube wenigstens ein Strömungsverteiler angeordnet. Bei diesen Strömungsverteilern handelt es sich üblicherweise um Gasverteilungsvorrichtungen in Form von Lochblechen, die oft in mehreren Lagen hintereinander angeordnet werden.To equalize the flow of the filter is usually in the gas supply at least one flow distributor immediately before the electrostatic precipitator in the widened region of the gas inlet hood arranged. These flow distributors are usually gas distribution devices in the form of perforated sheets, often arranged in several layers one behind the other become.

Zur weiteren Verbesserung der Filterleistung oder um überhaupt erst die zur Filtration notwendigen Bedingungen im zu filternden Gas zu schaffen, werden in der Gaszuführung mit Hilfe einer Zumischvorrichtung Konditioniermittel in den Gasstrom gemischt. Dabei handelt es sich einmal um eine abkühlende Konditionierung, bei der Wasser zur Kühlung des Gases in die Gasströmung gesprüht wird. Oft wird das Gas auch ohne Absenkung der Gastemperatur konditioniert, indem SO3, NH3, Wasserdampf oder ähnliches unter anderem zur Reduktion des elektrischen Staubwiderstandes in das zu filternde Gas eingespritzt werden. Um eine möglichst gleichmäßige Zumischung zu erreichen, weist die Zumischvorrichtung in der Regel eine Vielzahl von in der Gaszuführung angeordneten Düsen auf.To further improve the filter performance, or even to create the conditions necessary for filtration in the gas to be filtered, conditioning agents are mixed into the gas stream in the gas feed with the aid of an admixing device. This is once a cooling conditioning in which water is sprayed into the gas flow to cool the gas. Often, the gas is conditioned without lowering the gas temperature by SO 3 , NH 3 , water vapor or the like, among other things, to reduce the electrical dust resistance are injected into the gas to be filtered. In order to achieve the most uniform admixture, the admixing device usually has a plurality of nozzles arranged in the gas supply.

Diese bekannten Elektrofiltervorrichtungen haben sich in der Vergangenheit bereits sehr bewährt. Vor dem Hintergrund der immer weiter verschärften Anforderungen zum Emissionsschutz von Filteranlagen besteht aber dennoch ein großer Bedarf an Elektrofiltervorrichtungen, die einen gegenüber diesem Stand der Technik verbesserten Wirkungsgrad aufweisen.These known electrostatic filter devices have already proven themselves in the past. Against the background of the ever more stringent emission requirements of Filter systems but there is still a great need for electrostatic filter devices, the one opposite have improved efficiency in this prior art.

Der Erfindung liegt daher die Aufgabe zugrunde, den Wirkungsgrad von Elektrofiltervorrichtungen zu verbessern.The invention is therefore based on the object, the efficiency of electrostatic precipitators to improve.

Die Lösung dieser Aufgabe gelingt mit der Gaszuführung für einen Elektrofilter gemäß Anspruch 1 und der Elektrofiltervorrichtung gemäß Anspruch 12. Bevorzugte Weiterbildungen der Gaszuführung sind den Unteransprüchen zu entnehmen.The solution to this problem is achieved with the gas supply for an electric filter according to claim 1 and the electrostatic filter device according to claim 12. Preferred developments of the gas supply are to be taken from the subclaims.

Die Erfindung betrifft demnach zunächst die Gaszuführung für einen Elektrofilter einer Elektrofiltervorrichtung, da nach Untersuchungen der Erfinder gerade im Bereich der Zuleitung des Gases zum Filter besonders großes Verbesserungspotential im Hinblick auf den Wirkungsgrad der Elektrofiltervorrichtung vorhanden ist. Hierbei handelt es sich um eine grundsätzlich bekannte Gaszuführung, die einen Anströmkanal mit konstanter Querschnittsfläche, eine Gaseintrittshaube mit sich in Richtung des Elektrofilter aufweitender Querschnittsfläche und eine Zumischvorrichtung für ein Konditioniermittel aufweist. Dabei ist im aufgeweiteten Querschnittsbereich wenigstens ein Strömungsverteiler angeordnet. The invention therefore initially relates to the gas supply for an electrostatic precipitator of an electrostatic precipitator device, since, according to studies of the inventor just in the field of supply of the gas to Filter particularly great potential for improvement with regard to the efficiency of the electrostatic filter device is available. This is a basically known gas supply, the one Inflow channel with constant cross-sectional area, a gas inlet hood with in the direction of Electrostatic filter aufweitender cross-sectional area and an admixing device for a conditioning agent having. At least one flow distributor is arranged in the expanded cross-sectional area.

Die erfindungsgemäße Gaszuführung unterscheidet sich nun von den bekannten Gaszuführungen dadurch, dass eine erste Vorderkantenwirbel erzeugende Wirbelvorrichtung im Anströmkanal, eine zweite Vorderkantenwirbel erzeugende Wirbelvorrichtung in der Gaseintrittshaube in Gasströmungsrichtung vor dem Strömungsverteiler und die Zumischvorrichtung im Bereich einer der beiden Wirbelvorrichtungen angeordnet ist. Bei diesen Wirbelvorrichtungen handelt es sich um grundsätzlich bekannte Einbauelemente, wie sie zum Beispiel in der EP 0638732 A1 bereits für einen Diffusor beschrieben worden sind.The gas supply according to the invention now differs from the known gas supply lines in that a first vortex vortex generating vortex device in the inflow channel, a second leading edge vortex generating vortex device in the gas inlet hood in the gas flow direction in front of the flow distributor and the admixing device in the region of one of the two vortex devices is arranged. These vortex devices are basically known Built-in elements, as described for example in EP 0638732 A1 already for a diffuser have been.

Wesentlich an diesen Wirbelvorrichtungen ist, dass sie Vorderkantenwirbel erzeugen. Diese auch als Wirbelschleppen bezeichneten Randwirbel kann man sich dabei als kleine in Strömungsrichtung gerichtete Tornados vorstellen, deren Durchmesser in Strömungsrichtung anwachsen. Die Wirbel drehen sich dabei von den Seitenrändern der Wirbelvorrichtung zunächst nach außen und rollen sich dann nach innen ein, wodurch sich gegenüberliegende Wirbel gegenläufig drehen. Blickt man stromabwärts auf eine derartige Wirbelvorrichtung, so sehen die Vorderkantenwirbel wie zwei sich gegenläufig einrollende Schnecken aus.Essential to these whirling devices is that they produce leading edge vertebrae. These Also known as wake vortices edge vortex can be as small in the flow direction introduce directed tornadoes whose diameters increase in the direction of flow. The vortex In doing so, they first turn outward from the side edges of the vortex device and roll then inward, causing opposite vortex rotate in opposite directions. Looking down the river to such a vortex device, the leading edge vertebrae see as two in opposite directions rolling snails out.

Diese Vorderkantenwirbel haben den Vorteil, dass sie ausgesprochen stabile Wirbelsysteme sind, die zu einer besonders effektiven Durchmischung der Gasströmung führen. Dadurch ist es möglich, dass sich ein weitestgehend gleichmäßig turbulentes Strömungsverhalten hinter einer solchen Wirbelvorrichtung bildet, dass sich nahezu unabhängig von der gerade durchströmenden Gasmenge einstellt. Somit müssen derartige Wirbelvorrichtungen nicht ständig an schwankende Gasmengen angepasst werden. Man spricht daher in diesem Zusammenhang auch von statischen Mischern. Aufgrund dieser guten Durchmischungseigenschaften hat man die Vorderkantenwirbel erzeugenden Wirbelvorrichtungen insbesondere in Diffusoren dazu genutzt, um herkömmliche Umlenkbleche, Leitbleche oder Lochbleche die zur Strömungsverteilung oder Umlenkung dienen, vollständig durch diese zu ersetzen.These leading edge vertebrae have the advantage of being extremely stable vortex systems are that lead to a particularly effective mixing of the gas flow. This makes it possible that a largely uniform turbulent flow behavior behind such a vortex device forms that sets almost independent of the currently flowing gas through. Thus, such vortex devices do not have to be constantly adapted to fluctuating gas quantities become. One speaks therefore in this context of static mixers. Based on these good mixing properties you have the vortex vortex generating vortex devices used in particular in diffusers to conventional baffles, baffles or perforated plates which serve to flow distribution or diversion to completely replace them.

Bisher wurden derartige Wirbelvorrichtungen nicht in Elektrofiltervorrichtungen oder Gaszuführungen für Elektrofilter benutzt, da man sie nicht für diese Anwendung als geeignet hielt, um die Strömungsverteiler (Lochbleche) vollständig zu ersetzen. Insbesondere die sich auf einer sehr kürzen Strömungsstrecke stark aufweitende Gaseintrittshaube erschien bisher für den Einsatz von derartigen Vorderkantenwirbel erzeugenden Wirbelvorrichtungen zu kurz um eine effektive Vergleichsmäßigung der Strömung zu erreichen.So far, such vortex devices have not been used in electrostatic precipitators or gas supplies used for electrostatic precipitators because they were not considered suitable for this application to the Completely replace flow distributor (perforated plates). Especially on a very short cut Flow path strongly expanding gas inlet hood previously appeared for the use of such Leading vortex vortex devices too short to effectively equalize to reach the flow.

Im Gegensatz dazu werden hier nun die Wirbelvorrichtungen auch in der sich extrem aufweitenden Gaseintrittshaube einer Gaszuführung für einen Elektrofilter eingesetzt, aber anders als bisher nicht dazu benutz, um die strömungsverteilenden Einbauelemente, sprich Strömungsverteiler, vollständig zu ersetzen, sondern nur deren Anströmung zumindest bereichsweise zu verbessern.In contrast, the whirling devices are now also in the extremely widening here Gas inlet hood of a gas supply used for an electrostatic precipitator, but different than before not used to complete the flow-distributing components, ie flow distributor to replace, but only to improve their flow at least partially.

Konkret heißt das, dass die Anströmung des vor dem Elektrofilter angeordneten Strömungsverteilers so optimiert wird, dass nur eine einzige Lochblechlage und nicht wie bisher zwei oder drei Lochblechlagen benötigt werden. Dabei haben die Wirbelvorrichtungen aufgrund ihrer in Strömungsrichtung schräg gestellten Anordnung eine in Strömungsrichtung nur sehr geringe Projektionsfläche bei einer hohen Durchwirbelungswirkung, wodurch die Druckverluste stark gesenkt werden. Zugleich ergibt die kräftige Verwirbelung, dass sich die Partikel stark bewegen und sich nicht mehr so leicht wie bisher ablagern. Durch die Verwirbelung werden gleichzeitig Staubsträhnen aufgelöst und verteilt, so dass die Staubpartikelverteilung vergleichmäßigt wird. Zugleich kann aufgrund der turbulenten aber vergleichmäßigten Anströmung, die Strömungsverteilung auf den Elektrofilter bereits mit einer einzigen Lochblechlage erfolgen. Dadurch reduzieren sich die Einbauflächen in der Gaszuführung, und der Wirkungsgrad des Elektrofilters bzw. der Elektrofiltervorrichtung wird insgesamt deutlich gesteigert, während die grundsätzlich als vorteilhaft eingeschätzte Anströmung des Elektrofilters über ein Lochblech beibehalten werden kann.Specifically, this means that the flow of the arranged upstream of the electrostatic precipitator flow is optimized so that only a single perforated sheet and not as previously two or three perforated sheet layers needed. In this case, the vortex devices have due to their in the flow direction obliquely arranged arrangement in the flow direction only a very small projection area at a high Fluidizing effect, whereby the pressure losses are greatly reduced. At the same time the results strong turbulence that the particles move strongly and no longer deposit as easily as before. The turbulence at the same time dust strands are dissolved and distributed, so that the Dust particle distribution is made uniform. At the same time, due to the turbulent but evened Flow, the flow distribution to the electrostatic precipitator already with a single perforated sheet layer respectively. This reduces the installation space in the gas supply, and the efficiency of the electrostatic precipitator or the electrostatic filter device is significantly increased overall, while the basically considered as favorably estimated flow of the electrostatic filter via a perforated plate can be.

Zudem zeichnet sich die erfindungsgemäße Gaszuführung dadurch aus, dass eine Wirbelvorrichtung im Anströmkanal mit zumindest annähernd konstantem Querschnitt angeordnet wird. Damit erfolgt die Bildung von ersten Vorderkantenwirbeln bereits im rohrförmigen Abschnitt mit im wesentlichen parallelen Kanalwänden. Diese Anordnung steht in Gegensatz zur bisherigen Lehre, die davon ausgeht, dass die Wirbelvorrichtungen stets innerhalb der sich aufweitenden Bereiche eines Diffusors angeordnet werden sollen. Sie basiert auf einem Synergieeffekt, der sich aus der Beibehaltung des wenigstens einen Strömungsverteilers vor dem Elektrofilter ergibt.In addition, the gas supply according to the invention is characterized in that a vortex device is arranged in the inflow channel with at least approximately constant cross-section. In order to the formation of first leading edge vortex already takes place in the tubular section with substantially parallel channel walls. This arrangement is in contrast to the previous teaching that of it assumes that the vortex devices always within the widening areas of a diffuser should be arranged. It is based on a synergy effect resulting from the retention of at least a flow distributor in front of the electrostatic precipitator results.

Untersuchungen der Erfinder haben nämlich gezeigt, dass die vorgezogene Anordnung der ersten Wirbelvorrichtung im Anströmkanal gerade bei Elektrofiltern eine ausreichend vorteilhafte Strömungsverteilung erzeugt, wenn im Anschluss eine weitere Wirbelvorrichtung und ein Strömungsverteiler, also ein Lochblech, folgen. Dadurch ist es zum Beispiel auch unter Zuhilfenahme einfacher bzw. herkömmlicher Umlenkbleche möglich, die grundsätzlich bereits turbulente und gut durchmischte Gasströmung in der Gaseintrittshaube in Richtung des Strömungsverteilers zu richten, der dann die gleichmäßige Durchströmung des Elektrofilters sicherstellt.Investigations by the inventors have shown that the preferred arrangement of the first Whirling device in the inflow, especially in electrostatic precipitators a sufficiently advantageous flow distribution produced, if subsequently another vortex device and a flow distributor, So a perforated plate, follow. This makes it easier, for example, with the help of Conventional baffles possible, the principle already turbulent and well mixed gas flow in the gas inlet hood in the direction of the flow distributor, which then the uniform Flow through the electrostatic filter ensures.

Besonders vorteilhaft ist, dass nunmehr die Zumischvorrichtung im Bereich einer der beiden Wirbelvorrichtungen angeordnet wird. So kann man die kräftigen Vorderkantenwirbel zur effektiven Zumischung eines Konditioniermittels in den Gasstrom nutzen. Aufgrund der sich in Strömungsrichtung ausbreitenden Vorderkantenwirbelsysteme ergibt sich so auch bei einer punktuellen Einspritzung eine besonders gute Vermischung des Konditioniermittels über den Strömungsquerschnitt hinweg.It is particularly advantageous that now the admixing device in the region of one of the two Whirling devices is arranged. So you can use the powerful leading edge vortices for effective Use admixture of a conditioning agent in the gas stream. Due to the flow direction spreading leading edge eddy systems thus results even with a punctual injection one particularly good mixing of the conditioning agent across the flow cross-section.

Weiterbildend ist die erste Wirbelvorrichtung in Hauptströmungsrichtung vor einer Krümmung des Anströmkanals angeordnet. Dies hat den Vorteil, dass die erste Wirbelvorrichtung auch zur Umlenkung der Gasströmung in Krümmungsrichtung des Anströmkanals benutzt wird.Developing the first vortex device in the main flow direction before a curvature arranged the Anströmkanals. This has the advantage that the first whirling device also for deflection the gas flow is used in the direction of curvature of the inflow channel.

Dabei ist die erste Wirbelvorrichtung zweckmäßiger Weise dichter zur Krümmungsinnenseite des Anströmkanals als zu dessen Krümmungsaußenseite, also in Bezug auf die Mitte des Anströmkanals asymmetrisch auf der Innenseite der Krümmung angeordnet. Dadurch wird der Strömung auf der Innenseite eine erhöhte Strömungsenergie zugeführt, die die Strömung befähigt, besser der scharfen Umlenkung der Innenkante zu folgen. Im Zusammenspiel mit der zweiten Wirbeleinrichtung ist es somit möglich, eine nahezu ablösungsfreie Umlenkung in der Filterhaube zu erzielen, was die Strömungsverteilung deutlich verbessert.In this case, the first vortex device is expediently closer to the curvature inside the Anströmkanals than to the outside of the curvature, ie with respect to the center of the inflow channel arranged asymmetrically on the inside of the curvature. This will change the flow on the inside an increased flow energy supplied, which enables the flow, better the sharp deflection to follow the inner edge. It is thus in interaction with the second vortex device possible to achieve a nearly separation-free deflection in the filter hood, what the flow distribution clearly improved.

Grundsätzlich kann die erste Wirbelvorrichtung im Anströmkanal derart angewinkelt angeordnet, dass die Anströmkante ihrer der Gasströmung zugewandten wenigstens einen Anströmfläche in Richtung der Krümmungsinnenseite und die Abrisskante zur Krümmungsaußenseite des Anströmkanals weist. Bevorzugt ist die erste Wirbelvorrichtung allerdings andersherum im Anströmkanal angewinkelt angeordnet, so dass die Anströmkante ihrer der Gasströmung zugewandten wenigstens einen Anströmfläche in Richtung der Krümmungsaußenseite und die Abrisskante zur Krümmungsinnenseite des Anströmkanals weist. Dabei ist die Anströmkante die Kante der Wirbelvorrichtung, die der Gasströmung zugewandt ist und die Abrisskante ist die Kante, die der Strömung abgewandt ist. Mit anderen Worten: An der Anströmkante wird der Wirbelvorgang ausgelöst, und an der Abströmkante verlässt die Gasströmung die Anströmfläche. Bei dieser Ausgestaltung ergibt sich ein besonders stark ausgebildetes Vorderkantenwirbelsystem an der Abrisskante, das sehr weit in den Bereich der Krümmungsaußenseite des Anströmkanals hineinreicht.In principle, the first vortex device can be arranged at an angle in the inflow channel, that the leading edge of the gas flow facing at least one inflow in Direction of the curvature inside and the spoiler edge to the curvature outside of the inflow has. Preferably, however, the first vortex device is angled in the inflow channel the other way round arranged so that the leading edge of their gas flow facing at least one inflow surface in the direction of the curvature outside and the tear-off edge to the curvature inside of the inflow channel has. The leading edge is the edge of the vortex device, that of the gas flow is facing and the tear-off edge is the edge that faces away from the flow. In other words: At the leading edge of the vortexing is triggered, and leaves at the trailing edge, the gas flow the inflow area. In this embodiment, a particularly strong trained Vorderkantenwirbelsystem At the trailing edge, which is very far in the area of the curvature outside of the Inlet duct extends.

Es ist von Vorteil, wenn die zweite Wirbelvorrichtung in einem unteren Bereich der Gaseintrittshaube angeordnet ist. Dies führt dazu, dass insbesondere der untere Bereich der Gaseintrittshaube mit Vorderkantenwirbeln durchmischt wird, so dass sich Staubpartikel, die sich aufgrund ihres Gewichtes nach unten bewegen, nicht am Boden der Gaseintrittshaube ablagern, sondern vielmehr turbulent vor dem Filter wieder in die Gasströmung eingemischt werden. Dies reduziert die sich am Boden der Gaseintrittshaube ansammelnden Partikelablagerungen und führt zu einer deutlichen Wirkungsgradverbesserung des Elektrofilters. Zudem wird bei einem vertikal angeordneten Anströmkanal die, aufgrund einer Krümmung in horizontale Richtung umgelenkte, Luftströmung nochmals durch die zweite Wirbelvorrichtung in eine horizontalere Richtung gelenkt. Die Wirbelvorrichtung dient somit nicht nur als Mittel zur Durchmischung sondern auch als Umlenkmittel.It is advantageous if the second vortex device in a lower region of the gas inlet hood is arranged. This results in that in particular the lower portion of the gas inlet hood with Leading edge vortex is mixed, causing dust particles that are due to their weight Move down, not at the bottom of the gas inlet hood deposit, but rather turbulent ago the filter are mixed back into the gas flow. This reduces the at the bottom of the gas inlet hood accumulating particle deposits and leads to a significant improvement in efficiency of the electrostatic precipitator. In addition, in a vertically arranged inflow the, due to a Curvature deflected in the horizontal direction, air flow again through the second vortex device steered in a more horizontal direction. The whirling device thus serves not only as a means for mixing but also as a deflection.

Zweckmäßig ist es, wenn die zweite Wirbelvorrichtung in einem spitzen Winkel zu einer Wand der Gaseintrittshaube angeordnet ist. Dabei ist unter einem spitzen Winkel ein Winkel von weniger als 45° und mehr als 0,5 ° zu verstehen. Dadurch wird an den Anströmkanten der Wirbelvorrichtung ein ausgeprägtes Vorderkantenwirbelsystem erzeugt.It is expedient if the second vortex device at an acute angle to a wall the gas inlet hood is arranged. At an acute angle, an angle of less than 45 ° and more than 0.5 ° to understand. As a result, at the leading edges of the vortex device pronounced leading edge eddy system generates.

Besonders bevorzugt mündet die Zumischvorrichtung hinter der Anströmkante einer Wirbelvorrichtung. Dadurch können auch sehr einfache Zumischvorrichtungen benutzt werden, wie zum Beispiel ein einfacher Rohrstutzen, der hinter der Anströmkante einer Wirbelvorrichtung mündet. Aufgrund der sich an der Anströmkante bildenden starken und sich in Strömungsrichtung kegelförmig ausweitenden Wirbel, erfolgt so auch bei einer nur punktuellen Zumischung eine sehr gute Vermischung des durch den Rohrstutzen austretenden Konditioniermittels mit dem vorbeiströmenden Gas. Dabei sind auch Ausführungsformen zweckmäßig, bei denen die Zumischvorrichtung unmittelbar an der Wirbelvorrichtung angebracht ist.Particularly preferably, the admixing device opens behind the leading edge of a vortex device. As a result, very simple Zumischvorrichtungen can be used, such as a simple pipe socket, which opens behind the leading edge of a vortex device. Due to the at the leading edge forming strong and conically widening in the flow direction Vortex, takes place so even with a just selective admixing a very good mixing of the pipe stub exiting conditioning with the gas flowing past. There are too Embodiments expedient in which the admixing device directly to the vortex device is appropriate.

Eine Wirbelvorrichtung sollte wenigstens eine Wirbelscheibe aufweisen. Wirbelscheiben sind hinlänglich bekannt und können kreisförmig, elliptisch, rechteckig oder auch Deltaflügel-förmig ausgeführt sein, wobei Scheiben in gerader oder geknickter Ausführungsform bzw. auch in dreieckigen oder tropfenförmigen Querschnittsausführungen geeignet sind.A whirling device should have at least one vertebral disc. There are swirl disks Well known and can be circular, elliptical, rectangular or even delta wing-shaped running be, with discs in straight or kinked embodiment or in triangular or drop-shaped cross-sectional embodiments are suitable.

Weiterbildend weist eine Wirbelvorrichtung mehrere nebeneinander in einem Strömungsquerschnitt angeordnete Wirbelscheiben auf. Dabei können die Wirbelscheiben miteinander verkettet oder auch einzeln individuell an der Wandung befestigt sein. Auch können so kettenartig um den gesamten Querschnitt herum verlaufende Wirbelvorrichtungen gebildet werden. Das bedeutet, dass bei einem rechteckigen Anströmkanal jeweils mindestens eine Wirbelscheibe oben, unten, links und rechts angeordnet ist.Further, a vortex device has a plurality of side by side in a flow cross-section arranged vertebrae on. In this case, the vertebrae can be linked together or individually attached to the wall individually. Also, so can chain around the entire Cross-section are formed around vortex devices. That means that at one rectangular Anströmkanal each arranged at least one vortex disc top, bottom, left and right is.

Bevorzugt weist eine Wirbelvorrichtung mehrere kaskadierend angeordnete Wirbelscheiben auf. Unter kaskadierend versteht man hier eine funktionale Abfolge von hintereinander angeordneten Wirbelscheiben. Diese geben somit ein treppenförmig angeordnetes Bild wieder, wobei auch schräg oder diagonal versetzte Anordnungen der einzelnen Wirbelscheiben denkbar sind. Wichtig ist nur, dass der Gasstrom von einer Wirbelscheibe zur nächsten weitergeleitet wird, wobei eine optimale Induktionswirkung auftritt. A vortex device preferably has a plurality of cascading arranged vortex discs. Cascading here means a functional sequence of successively arranged vertebral discs. These thus give a staircase-shaped image again, where also oblique or diagonally offset arrangements of the individual vertebrae are conceivable. The important thing is that the Gas flow is forwarded from one vortex disc to the next, with an optimal induction effect occurs.

Auch ist es zu bevorzugen, wenn eine Wirbelvorrichtung ein System aus mehreren Wirbelscheiben aufweist. Ein derartiges Wirbelscheibensystem kann zum Beispiel aus einer Mehrzahl von Wirbelscheiben bestehen, die auf einer gemeinsamen Schwenkachse angeordnet sind. So können mehrere Wirbelscheiben gemeinsam in einem zueinander fest definierten funktionalen Zusammenhang in ihrer Wirkungsweise zum Beispiel durch Drehen bzw. Verschwenken verändert werden.Also, it is preferable if a vortex device is a system of multiple vortex discs having. Such a vortex plate system may for example consist of a plurality of vortex discs exist, which are arranged on a common pivot axis. So can several Vertebral discs together in a firmly defined functional relationship in their Mode of action, for example, be changed by turning or pivoting.

Erfindungsgemäß wird die Aufgabe auch durch eine Elektrofiltervorrichtung gelöst, die einen Elektrofilter und eine Gaszuführung nach einer der vorher geschilderten Ausführungs- und Weiterbildungsformen aufweist. Diese Elektrofiltervorrichtung zeichnet sich insbesondere durch die Verwendung von Wirbelscheiben in der vorbeschriebenen Art und Weise aus, wodurch sich die bereits in den vorhergehenden Ausführungsformen der Gaszuführung beschriebenen Vorteile ergeben.According to the invention the object is also achieved by an electrostatic filter device, the one Electrostatic precipitator and a gas supply according to one of the previously described embodiments and further developments having. This electrostatic filter device is characterized in particular by the use of vertebral discs in the manner described above, which is already in the preceding Embodiments of the gas supply described advantages.

Nachfolgend wird die Erfindung anhand einer Zeichnung weiter erläutert. Darin zeigt schematisch:

Fig. 1
einen Längsschnitt durch eine Elektrofiltervorrichtung die einen Elektrofilter und eine Gaszuführung aufweist.
The invention will be further explained with reference to a drawing. In it shows schematically:
Fig. 1
a longitudinal section through an electrostatic filter device having an electric filter and a gas supply.

Die in Fig. 1 gezeigte Ausführungsform der erfindungsgemäßen Elektrofiltervorrichtung 1 hat einen Elektrofilter 2, eine Gaszuführung 3 und einer Gasabführung 4. Die Gaszuführung 3 wird im Betrieb der Elektrofiltervorrichtung 1 von einem zu filternden Gasstrom 5 durchströmt, die diesen aus einer vertikalen in eine im Wesentlichen horizontale Richtung umlenkt und auf den Filter 2 richtet. Im Filter 2 wird der zu filternde Gasstrom 5 dann von darin enthaltenen Partikeln durch die bereits oben erläuterten elektrischen Vorgänge befreit und tritt über die Gasabführung 4 als gefilterter Gasstrom 6 aus der Elektrofiltervorrichtung 1 aus.The embodiment of the electrostatic filter device 1 according to the invention shown in FIG. 1 has an electrostatic filter 2, a gas inlet 3 and a gas outlet 4. The gas supply 3 is in operation of the electrostatic filter device 1 flows through a gas flow to be filtered 5, the latter from a deflects vertically in a substantially horizontal direction and directed to the filter 2. in the Filter 2 is the gas stream 5 to be filtered then particles contained therein through the already above explained electrical processes released and exits via the gas outlet 4 as a filtered gas stream 6 the electrostatic filter device 1 from.

Die Gaszuführung 3 beinhaltet also in der hier gezeigten Ausführungsform einen vertikalen Anströmkanal 7 mit im Wesentlichen konstantem Strömungsquerschnitt. An den Anströmkanal 7 schließt sich in Hauptströmungsrichtung eine Krümmung 9 des Anströmkanals an. Dabei verändert der zu filternde Gasstrom 5 seine Strömungsrichtung von einer vertikalen hin zu einer horizontalen Richtung.The gas supply 3 thus includes in the embodiment shown here a vertical inflow channel 7 with a substantially constant flow cross-section. Close to the inflow channel 7 in the main flow direction, a curvature 9 of the inflow channel. It changes the to be filtered Gas flow 5 its flow direction from a vertical to a horizontal direction.

Dem gekrümmten Anströmkanalabschnitt 9 folgt dann die Gaseintrittshaube 8, die sich in Richtung des Filters 2 in ihrem Querschnitt aufweitet. Unmittelbar vor dem Elektrofilter 2, also im Bereich der größten Querschnittsfläche der Gaseintrittshaube 8 befindet sich der Strömungsverteiler 10, bei dem es sich hier um ein einfaches Lochblech handelt. The curved Anströmkanalabschnitt 9 then follows the gas inlet hood 8, which extends in the direction of the filter 2 widens in its cross section. Immediately before the electrostatic filter 2, ie in the area the largest cross-sectional area of the gas inlet hood 8 is the flow distributor 10, in which this is a simple perforated plate.

Im Anströmkanal 7 vor dem gekrümmten Abschnitt 9 ist eine erste Vorderkantenwirbel erzeugende Wirbelvorrichtung 11 angeordnet. Die zweite Vorderkantenwirbel erzeugende Wirbelvorrichtung 12 befindet sich im schmalen Bereich der Gaseintrittshaube 8, also in Strömungsrichtung vor dem Lochblech 10. Beide Wirbelvorrichtungen sind in dem hier gezeigten Ausführungsbeispiel jeweils ein einzelnes kreisförmiges Wirbelblech, dass an seiner der Gasströmung zugewandten Seite eine Anströmfläche 13 aufweist. Die Anströmfläche 13 verbindet hierbei die stromaufwärts gerichtete Anströmkante 14 und die stromabwärts gerichtete Abrisskante 15.In the inflow channel 7 in front of the curved portion 9 is a first leading edge vortex generating Whirling device 11 is arranged. The second leading edge vortex generating vortex device 12 is located in the narrow region of the gas inlet hood 8, ie in the flow direction in front of the perforated plate 10. Both vortex devices are each a single one in the embodiment shown here circular vortex plate that at its gas flow side facing an inflow 13 has. The inflow surface 13 in this case connects the upstream directed inflow edge 14 and the downstream tear-off edge 15.

Dabei ist das erste Wirbelblech 11 vor der Krümmung 9 so angeordnet, dass die Anströmfläche 13 sich in Strömungsrichtung von der Krümmungsaußenseite 21 zur Krümmungsinnenseite 22 der Krümmung 9 erstreckt. Bei der hier dargestellten sehr scharfen Krümmung 9 ist die Krümmungsaußenseite 21 also das schräg nach oben stehende Blech, während die Krümmungsinnenseite 22 der Ecke bzw. dem Übergang zwischen Anströmkanal 7 und Gaseintrittshaube 8 entspricht.In this case, the first vortex plate 11 is arranged in front of the curvature 9 so that the inflow surface 13 in the flow direction from the curvature outside 21 to the curvature inside 22 of the Curvature 9 extends. In the very sharp curvature 9 shown here is the curvature outside 21 so the obliquely upstanding sheet, while the curvature inside 22 of the corner or the transition between inflow duct 7 and gas inlet hood 8 corresponds.

Konkret ist das erste Wirbelblech 11 so angeordnet, dass die Anströmkante 14 nach unten, also gegen die zu filternden Gasströmung 5, gerichtet ist und die Abrisskante 15 nach oben weist. Die Anströmfläche 13 verläuft also im dargestellten Längsschnitt von der Anströmkante 14 schräg nach oben zur Abrisskante 15.Specifically, the first vortex plate 11 is arranged so that the leading edge 14 down, so directed against the gas flow to be filtered 5, and the tear-off edge 15 faces upward. The inflow area 13 thus extends in the illustrated longitudinal section of the leading edge 14 obliquely upwards to the tear-off edge 15.

An dieser schräg angeströmten Wirbelvorrichtung 11 bildet sich hinter der Anströmkante 14 ein ausgeprägtes Vorderkantenwirbelsystem 16, welches sich von der Anströmkante 14 in Hauptströmungsrichtung 5 vertikal nach oben ausbreitet. Dabei vergrößert sich der Durchmesser der Vorderkantenwirbel 16 quer zur Hauptströmungsrichtung der Gasströmung 5. Entsprechendes gilt auch für das zweite Wirbelblech 12, wo sich ebenfalls ein Vorderkantenwirbelsystem 17 ausbildet, wobei das Vorderkantenwirbelsystem 17 im Wesentlichen auf das Lochblech 10 zuströmend nahezu horizontal ausgerichtet ist.At this obliquely flowed vortex device 11 forms behind the leading edge 14 a pronounced leading edge eddy system 16 extending from the leading edge 14 in the main flow direction 5 extends vertically upwards. This increases the diameter of the leading edge vertebrae 16 transverse to the main flow direction of the gas flow 5. The same applies to the second Whirling plate 12, where also forms a leading edge vortex system 17, wherein the leading edge vortex system 17 aligned substantially horizontally to the perforated plate 10 incoming is.

Zur gleichmäßigen Umlenkung der Gaströmung 5 von der Vertikalen in Richtung der Horizontalen befinden sich in der Gaseintrittshaube 8 im oberen Bereich Umlenkbleche 18 herkömmlicher gekrümmter Bauart. Sie ergänzen lediglich den bereits durch die Wirbelvorrichtung 11 erzeugte Richtungsänderung der Gasströmung und dienen insbesondere nicht der Verwirbelung.For the uniform deflection of the gas flow 5 from the vertical in the direction of the horizontal are in the gas inlet hood 8 in the upper part baffles 18 conventional curved design. They merely supplement the change in direction already generated by the whirling device 11 the gas flow and serve in particular not the swirling.

Zur Konditionierung des zu filternden Gases 5 ist im Anströmkanal 7 und zwar im Bereich der Anströmkante 14 des ersten Wirbelblechs 11 ein Rohrstutzen 19 angeordnet, durch den ein Konditioniermittel 20 in den Anströmkanal eingespritzt werden kann. Aufgrund der starken Verwirbelung der Gasströmung in dem sich stromabwärts ausbreitenden Wirbel 16 erfolgt so eine besonders gute Durchmischung des Gases mit dem Konditioniermittel 20, so dass eine aufwendige mehrdüsige Zumischvorrichtung entfallen kann. Dies senkt den Strömungswiderstand und die Herstellungskosten und macht die Zumischvorrichtung 19 weniger anfällig für Störungen, die sich zum Beispiel aus Staubablagerungen ergeben.For conditioning of the gas to be filtered 5 is in the inflow duct 7 and that in the region of Leading edge 14 of the first vortex plate 11 a pipe socket 19 is arranged, through which a conditioning agent 20 can be injected into the inflow channel. Due to the strong turbulence of Gas flow in the downstream propagating vortex 16 is thus a particularly good mixing of the gas with the conditioning agent 20, so that a complex Mehrdüsige Zumischvorrichtung can be omitted. This lowers the flow resistance and the manufacturing costs and makes the Zumischvorrichtung 19 less susceptible to disturbances, for example, from dust deposits result.

Claims (12)

Gaszuführung (3) für einen Elektrofilter (2), die einen Anströmkanal (7) mit konstanter Querschnittsfläche, eine Gaseintrittshaube (8) mit sich in Richtung des Elektrofilters (2) aufweitender Querschnittsfläche und eine Zumischvorrichtung (19) für ein Konditioniermittel (20) aufweist, wobei im aufgeweiteten Querschnittsbereich der Gaseintrittshaube (8) wenigstens ein Strömungsverteiler (10) angeordnet ist,
dadurch gekennzeichnet, dass eine erste Vorderkantenwirbel (16) erzeugende Wirbelvorrichtung (11) im Anströmkanal (7), eine zweite Vorderkantenwirbel (17) erzeugende Wirbelvorrichtung (12) in der Gaseintrittshaube (8) in Gasströmungsrichtung vor dem Strömungsverteiler (10) und die Zumischvorrichtung (19) im Bereich einer der beiden Wirbelvorrichtungen (11, 12) angeordnet ist.Gas supply (3) for an electrostatic filter (2) having a Anströmkanal (7) with a constant cross-sectional area, a gas inlet hood (8) in the direction of the electrostatic filter (2) aufweitender cross-sectional area and a Zumischvorrichtung (19) for a conditioning (20) in which at least one flow distributor (10) is arranged in the widened cross-sectional area of the gas inlet hood (8),
characterized in that a first vortex vortex (16) generating vortex device (11) in the inflow channel (7), a second vortex vortex (17) generating vortex device (12) in the gas inlet hood (8) in the gas flow direction upstream of the flow distributor (10) and the Zumischvorrichtung ( 19) in the region of one of the two vortex devices (11, 12) is arranged. Gaszuführung nach Anspruch 1,
dadurch gekennzeichnet, dass die erste Wirbelvorrichtung (11) in Hauptströmungsrichtung vor einer Krümmung (9) des Anströmkanals (7) angeordnet ist.Gas supply according to claim 1,
characterized in that the first vortex device (11) in the main flow direction in front of a curvature (9) of the inflow channel (7) is arranged. Gaszuführung nach Anspruch 2,
dadurch gekennzeichnet, dass die erste Wirbelvorrichtung (11) dichter zur Krümmungsinnenseite (22) des Anströmkanals als zu dessen Krümmungsaußenseite (21) angeordnet ist. Gas supply according to claim 2,
characterized in that the first vortex device (11) is arranged closer to the curvature inside (22) of the inflow channel than to its curvature outside (21). Gaszuführung nach einem der Ansprüche 2 oder 3,
dadurch gekennzeichnet, dass die erste Wirbelvorrichtung (11) im Anströmkanal (7) derart angewinkelt angeordnet ist, dass die Anströmkante (14) ihrer der Gasströmung (5) zugewandten wenigstens einen Anströmfläche (13) in Richtung der Krümmungsaußenseite (21) und die Abrisskante (15) zur Krümmungsinnenseite (22) des Anströmkanals (7) weist.Gas supply according to one of claims 2 or 3,
characterized in that the first vortex device (11) in the inflow passage (7) is arranged angled such that the leading edge (14) of the gas flow (5) facing at least one inflow surface (13) in the direction of the curvature outside (21) and the trailing edge ( 15) to the curvature inside (22) of the inflow channel (7). Gaszuführung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die zweite Wirbelvorrichtung (12) in einem unteren Bereich der Gaseintrittshaube (8) angeordnet ist.Gas supply according to one of the preceding claims,
characterized in that the second vortex device (12) is arranged in a lower region of the gas inlet hood (8). Gaszuführung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die zweite Wirbelvorrichtung (12) in einem spitzen Winkel zu einer Wand der Gaseintrittshaube (8) angeordnet ist.Gas supply according to one of the preceding claims,
characterized in that the second vortex device (12) is arranged at an acute angle to a wall of the gas inlet hood (8). Gaszuführung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Zumischvorrichtung (19) hinter der Anströmkante (14) einer Wirbelvorrichtung (11, 12) mündet.Gas supply according to one of the preceding claims,
characterized in that the admixing device (19) behind the leading edge (14) of a vortex device (11, 12) opens. Gaszuführung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass eine Wirbelvorrichtung (11, 12) wenigstens eine Wirbelscheibe aufweist.Gas supply according to one of the preceding claims,
characterized in that a vortex device (11, 12) has at least one intervertebral disk. Gaszuführung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass eine Wirbelvorrichtung (11, 12) mehrere nebeneinander in einem Strömungsquerschnitt angeordnete Wirbelscheiben aufweist.Gas supply according to one of the preceding claims,
characterized in that a vortex device (11, 12) has a plurality of side by side arranged in a flow cross-section vertebrae. Gaszuführung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass eine Wirbelvorrichtung (11, 12) mehrere kaskadierend angeordnete Wirbelscheiben aufweist. Gas supply according to one of the preceding claims,
characterized in that a vortex device (11, 12) has a plurality of cascading arranged vertebrae. Gaszuführung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass eine Wirbelvorrichtung (11, 12) ein System aus mehreren Wirbelscheiben aufweist.Gas supply according to one of the preceding claims,
characterized in that a vortex device (11, 12) comprises a system of a plurality of vortex discs. Elektrofiltervorrichtung (1), die einen Elektrofilter (2) und eine Gaszuführung (3) nach einem der vorhergehenden Ansprüche aufweist.Electrostatic filter device (1) having an electrostatic precipitator (2) and a gas supply (3) after a of the preceding claims.
EP04013364A 2004-06-07 2004-06-07 Gas supply for electrostatic precipitator and electrostatic precipitator Active EP1604742B1 (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
DE502004011737T DE502004011737D1 (en) 2004-06-07 2004-06-07 Gas supply for electrostatic filter and electrostatic filter device
PL04013364T PL1604742T3 (en) 2004-06-07 2004-06-07 Gas supply for electrostatic precipitator and electrostatic precipitator
AT04013364T ATE483524T1 (en) 2004-06-07 2004-06-07 GAS SUPPLY FOR ELECTRICAL FILTER AND ELECTRICAL FILTER DEVICE
SI200431545T SI1604742T1 (en) 2004-06-07 2004-06-07 Gas supply for electrostatic precipitator and electrostatic precipitator
PT04013364T PT1604742E (en) 2004-06-07 2004-06-07 Gas supply for electrostatic precipitator and electrostatic precipitator
DK04013364.7T DK1604742T3 (en) 2004-06-07 2004-06-07 Gas supply for electrofilter and electrofilter device
ES04013364T ES2351980T3 (en) 2004-06-07 2004-06-07 GAS SUPPLY FOR ELECTROSTATIC PRECIPITATOR AND ELECTROSTATIC PRECIPITATOR.
EP04013364A EP1604742B1 (en) 2004-06-07 2004-06-07 Gas supply for electrostatic precipitator and electrostatic precipitator
US10/910,638 US6964698B1 (en) 2004-06-07 2004-08-04 Gas supply for electrostatic filter and electrostatic filter arrangement
CN200510007500A CN100577301C (en) 2004-06-07 2005-02-22 Gas supply for electrostatic filter and electrostatic filter arrangement
ZA200504241A ZA200504241B (en) 2004-06-07 2005-05-24 Gas supply for electrostatic filter and electrostatic filter arrangement
CA002508257A CA2508257C (en) 2004-06-07 2005-05-24 Gas supply for electrostatic filter and electrostatic filter arrangement
TW094117132A TWI291372B (en) 2004-06-07 2005-05-25 Gas supply for electrostatic filter and electrostatic filter arrangement
AU2005202330A AU2005202330B2 (en) 2004-06-07 2005-05-30 Gas supply for electrostatic filters and electrostatic filter arrangement
MXPA05005879A MXPA05005879A (en) 2004-06-07 2005-06-02 Gas supply for electrostatic filter and electrostatic filter arrangement.
RU2005117219/12A RU2298438C2 (en) 2004-06-07 2005-06-06 Pipeline for supplying gas to electrostatic filter and system with electrostatic filter
UAA200505390A UA80165C2 (en) 2004-06-07 2005-06-06 Gas supply for electrostatic filter and electrostatic filter arrangement
JP2005167283A JP4390746B2 (en) 2004-06-07 2005-06-07 Electrostatic filter device and gas supply device for electrostatic filter
KR1020050048599A KR100722341B1 (en) 2004-06-07 2005-06-07 Gas supply for electrostatic filter and electrostatic filter arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04013364A EP1604742B1 (en) 2004-06-07 2004-06-07 Gas supply for electrostatic precipitator and electrostatic precipitator

Publications (2)

Publication Number Publication Date
EP1604742A1 true EP1604742A1 (en) 2005-12-14
EP1604742B1 EP1604742B1 (en) 2010-10-06

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ID=34925272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04013364A Active EP1604742B1 (en) 2004-06-07 2004-06-07 Gas supply for electrostatic precipitator and electrostatic precipitator

Country Status (19)

Country Link
US (1) US6964698B1 (en)
EP (1) EP1604742B1 (en)
JP (1) JP4390746B2 (en)
KR (1) KR100722341B1 (en)
CN (1) CN100577301C (en)
AT (1) ATE483524T1 (en)
AU (1) AU2005202330B2 (en)
CA (1) CA2508257C (en)
DE (1) DE502004011737D1 (en)
DK (1) DK1604742T3 (en)
ES (1) ES2351980T3 (en)
MX (1) MXPA05005879A (en)
PL (1) PL1604742T3 (en)
PT (1) PT1604742E (en)
RU (1) RU2298438C2 (en)
SI (1) SI1604742T1 (en)
TW (1) TWI291372B (en)
UA (1) UA80165C2 (en)
ZA (1) ZA200504241B (en)

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Also Published As

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RU2005117219A (en) 2006-11-20
TW200539945A (en) 2005-12-16
JP2006021194A (en) 2006-01-26
PT1604742E (en) 2010-12-07
ZA200504241B (en) 2006-10-25
KR20060048237A (en) 2006-05-18
ES2351980T3 (en) 2011-02-14
TWI291372B (en) 2007-12-21
CA2508257A1 (en) 2005-12-07
AU2005202330B2 (en) 2009-12-03
DE502004011737D1 (en) 2010-11-18
KR100722341B1 (en) 2007-05-28
PL1604742T3 (en) 2011-05-31
RU2298438C2 (en) 2007-05-10
UA80165C2 (en) 2007-08-27
ATE483524T1 (en) 2010-10-15
CN1706554A (en) 2005-12-14
DK1604742T3 (en) 2011-01-03
US6964698B1 (en) 2005-11-15
CN100577301C (en) 2010-01-06
AU2005202330A1 (en) 2005-12-22
CA2508257C (en) 2008-09-09
EP1604742B1 (en) 2010-10-06
MXPA05005879A (en) 2006-03-17
US20050268784A1 (en) 2005-12-08
JP4390746B2 (en) 2009-12-24
SI1604742T1 (en) 2011-01-31

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