EP0010784A1 - Device and method for avoiding a soiling turbulence during the ventilation of insulators in electrofilters - Google Patents

Device and method for avoiding a soiling turbulence during the ventilation of insulators in electrofilters Download PDF

Info

Publication number
EP0010784A1
EP0010784A1 EP79200485A EP79200485A EP0010784A1 EP 0010784 A1 EP0010784 A1 EP 0010784A1 EP 79200485 A EP79200485 A EP 79200485A EP 79200485 A EP79200485 A EP 79200485A EP 0010784 A1 EP0010784 A1 EP 0010784A1
Authority
EP
European Patent Office
Prior art keywords
nozzles
gas
filter
ventilation
filter wall
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Withdrawn
Application number
EP79200485A
Other languages
German (de)
French (fr)
Inventor
Wolfgang Hartmann
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
Original Assignee
Metallgesellschaft AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of EP0010784A1 publication Critical patent/EP0010784A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/70—Applications of electricity supply techniques insulating in electric separators

Definitions

  • the invention relates to a device and a method for preventing the formation of a vortex leading to contamination in the ventilation of insulators in electrostatic filters, consisting of an insulating body arranged above or in an opening of the filter wall, a cap supported on the insulating body, on which the supporting device for the live conductors Parts of the electrostatic precipitator is fastened around the insulating body in the filter wall with the outlet openings directed downwards for the introduction of ventilation gases, a nozzle arranged around the outlet openings of the nozzles under the filter wall and gas-tightly connected to the filter wall Flushing pipe with a narrowed outlet cross-section, the outlet opening of which flows into the gas space of the electrostatic precipitator or into connecting pieces to the gas space, and a pressure space arranged above the nozzles for the supply of the ventilation gases.
  • the high-voltage parts of the filter are attached to insulators, which isolate them from the earthed parts of the filter wall. Since the isolators are at least partially connected to the gas space of the filter, there is a risk of contamination of the surfaces of the isolators.
  • the dirt usually has a lower insulation capacity and also likes to absorb moisture, which makes the insulator more or less conductive. In many cases, dirt or dust is naturally electrically conductive. It must therefore be prevented that dust settles on the surface of the insulators.
  • the insulating body is arranged in a flushing pipe into which ventilation gases are conducted which flow from the outlet opening of the flushing pipe into the gas space of the filter.
  • the gas flow is intended to prevent dust from entering the flushing pipe.
  • the ventilation gases are passed from a ring line by means of pipes vertically downwards into a tapered purge pipe.
  • the ventilation gases are sucked horizontally into the purge pipe through an annular gap.
  • the ventilation gases are introduced through a feed line into a cylindrical flushing pipe and, after leaving the flushing pipe, flow onto a baffle plate arranged under the outlet opening.
  • the invention has for its object to prevent the formation of eddies and the pollution of the insulators caused thereby with all operating conditions with certainty.
  • baffle plates are arranged below the openings of the nozzles in the flushing pipe perpendicular to the jet axis and symmetrically to the jet axis of the nozzles.
  • Particularly favorable flow conditions are achieved through an annular arrangement of the nozzles and a round cross section of the flushing pipe.
  • the outlet cross section of the flushing pipe is expediently kept just above the size necessary to avoid flashovers.
  • bell-shaped insulators which are arranged above the flushing pipe, the pressure space for the supply of the ventilation gases is designed in a circular shape.
  • the sealing of the insulating body with respect to the filter can then take place in such a way that seals are placed between the cap and the insulating body and the insulating body and the filter wall, which give a gas-tight seal under the load from the supporting device attached to the cap.
  • Covering the bell-shaped insulator with a pressure chamber which is also possible, is more complex.
  • shaft-shaped insulators which are arranged partly above and partly inside the flushing pipe, the upper part is enclosed by the pressure chamber.
  • cleaned gas can also be recirculated as ventilation gas.
  • the baffle plates can also be combined into an annular disc.
  • the nozzles should be made as precisely as possible.
  • a preferred embodiment is that the surfaces of the baffle plates are concave. As a result, particularly favorable flow conditions are achieved.
  • the edges of the baffle plates can be designed with slots.
  • baffle plates are arranged at a distance of 10 to 80 mm from the outlet openings of the nozzles. This also results in particularly good flow conditions.
  • a preferred embodiment is that the lower part of the flushing tube is cylindrical. This results in a parallel flow to the support device and a favorable outflow.
  • a preferred method for operating the device according to the invention is that the ventilation gases are blown from the pressure chamber through the nozzles in such a distribution and quantity into the flushing pipe that the kinetic energy of the gas streams emerging from the nozzles is deflected, deflected and distributed on the baffle plates is converted and destroyed to the extent that a uniform flow is maintained over the entire cross-sectional area of the outlet opening of the flushing pipe.
  • a preferred method is that a gas pressure is constantly maintained in the pressure chamber, which results in a pressure difference of 0.1 to 0.2 bar compared to the pressure prevailing in the gas chamber of the electrostatic filter. Due to the high degree of throttling, the same amount of gas is supplied through all nozzle bores, thereby achieving favorable flow conditions in the flushing pipe.
  • a preferred method is that the aeration gas is compressed to 0.08 to 0.1 bar and simultaneously heated before being fed into the pressure chamber. In addition to generating good flow conditions, separate heating of the gases is therefore unnecessary.
  • a circular opening 2 is arranged in the filter wall 1 (in FIG. 1 the ceiling of the filter; in FIG. 2 a connection piece to the actual filter housing).
  • a bell-shaped insulator 3 is arranged above the opening 2.
  • a shaft-shaped insulator 3 is arranged in the opening 2.
  • the carrying device 4 is attached to a cap 5.
  • Circular nozzles 6 are arranged in the filter wall 1 around the insulating body 3, the outlet openings of which are directed vertically downwards.
  • the flushing pipe 7 is arranged gas-tight under the filter wall 1 around the nozzles 6. Its outlet cross section is reduced with the help of a conical intermediate piece.
  • the lower part is of cylindrical design.
  • the outlet opening of the flushing pipe 7 opens directly into the gas space 8 of the filter; in Fig. 2 in the gas space of the connector 8a, which is in communication with the gas space 8 of the filter.
  • An annular pressure chamber 9 is located above the nozzles 6 in FIG. 1 arranged with supply device 10 for the ventilation gases.
  • Fig. 2 the entire upper part of the insulator 3 is enclosed by a pressure chamber 9.
  • baffle plates 11 are arranged below the outlet openings of the nozzles 6 perpendicular to and symmetrical to the steel axis of the nozzles 6, the surfaces of which are concave.
  • the advantages of the invention are that in all operating conditions, even with fluctuations in the electrostatic precipitator, a steady flow of the ventilation gases with flow conditions is reliably achieved in the purge tube, which avoids eddy formation in the purge tube, and therefore no dust can get into the purge tube and leads to contamination of the insulator surface.

Landscapes

  • Electrostatic Separation (AREA)

Abstract

Insulators of this kind connect partially to the gas space of the electric filter so that dust depositions form on them which can lead to sparkovers. In order to avoid this, the carrying devices (4) which are supported on the insulator (3) via a cap (5) and extend through an opening (2) of the filter wall (1) are surrounded with a so-called rinsing tube (7) which is mounted gas-tightly on the filter wall (1) and can be impacted with a ventilation gas stream. The ventilation gas is introduced into the rinsing tube in a circular fashion into the rinsing tube [lacuna] nozzles (6) arranged around the orifice (2) via a feed device (10) and an annular pressure space (9), from which it emerges into the gas space (8) of the filter. In devices of this kind, it must be prevented that inside the rinsing tube (7) eddies form which can lead to dust-containing gas being taken into the rinsing tube (7) and ultimately also to dust depositions on the insulator (3). In order to achieve this object, it is provided according to the invention that impact plates (11) are arranged below the openings of the nozzles (6) vertically and symmetrically with respect to the jet axis of the nozzles (6). In this way, an eddy-free ventilation gas stream is generated in the discharge plane of the rinsing pipe (7) and any return flow of dust-containing gases into the rinsing pipe (7) is avoided. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Verhinderung einer zur Verschmutzung führenden Wirbelbildung bei der Belüftung von Isolatoren in Elektrofiltern, bestehend aus einem über oder in einer Öffnung der Filterwandung angeordnetem Isolierkörper, einer auf dem Isolierkörper abgestützten Kappe, an der die Trageinrichtung für die spannungsführenden Teile des Elektrofilters befestigt ist, um den Isolierkörper herum in der Filterwandung mit den Austrittsöffnungen nach unten gerichtet angeordneten Düsen für die Einleitung von Belüftungsgasen, einem um die Austrittsöffnungen der Düsen herum unter der Filterwandung angeordnetem und mit der Filterwandung gasdicht verbundenem Spülrohr mit verengtem Austrittsquerschnitt, dessen Austrittsöffnung in den Gasraum des Elektrofilters oder in Verbindungsstücke zum Gasraum mündet, und einem über den Düsen angeordneten Druckraum für die Zufuhr der Belüftungsgase.The invention relates to a device and a method for preventing the formation of a vortex leading to contamination in the ventilation of insulators in electrostatic filters, consisting of an insulating body arranged above or in an opening of the filter wall, a cap supported on the insulating body, on which the supporting device for the live conductors Parts of the electrostatic precipitator is fastened around the insulating body in the filter wall with the outlet openings directed downwards for the introduction of ventilation gases, a nozzle arranged around the outlet openings of the nozzles under the filter wall and gas-tightly connected to the filter wall Flushing pipe with a narrowed outlet cross-section, the outlet opening of which flows into the gas space of the electrostatic precipitator or into connecting pieces to the gas space, and a pressure space arranged above the nozzles for the supply of the ventilation gases.

In Elektrofiltern zur Reinigung von trockenen oder feuchten Gasen sind die mit Hochspannung beaufschlagten Teile des Filters an Isolatoren befestigt und durch diese gegenüber den geerdeten Teilen der Filterwandung isoliert. Da die Isolatoren mindestens teilweise mit dem Gasraum des Filters in Verbindung stehen, besteht die Gefahr der Verschmutzung der Oberflächen der Isolatoren. Der Schmutz hat in der Regel eine geringere Isolierfähigkeit und nimmt zudem gerne Feuchtigkeit auf, die den Isolator mehr oder weniger leitend macht. In vielen Fällen ist der Schmutz oder auch der Staub von Natur aus elektrisch leitend. Es muß deshalb verhindert werden, daß sich Staub auf der Oberfläche der Isolatoren absetzt.In electrostatic precipitators for cleaning dry or moist gases, the high-voltage parts of the filter are attached to insulators, which isolate them from the earthed parts of the filter wall. Since the isolators are at least partially connected to the gas space of the filter, there is a risk of contamination of the surfaces of the isolators. The dirt usually has a lower insulation capacity and also likes to absorb moisture, which makes the insulator more or less conductive. In many cases, dirt or dust is naturally electrically conductive. It must therefore be prevented that dust settles on the surface of the insulators.

Es sind verschiedene Vorrichtungen bekannt, bei denen der Isolierkörper in einem Spülrohr angeordnet ist, in das Belüftungsgase geleitet werden, die aus der Austrittsöffnung des Spülrohres in den Gasraum des Filters strömen. Durch den Gasstrom soll ein Eindringen von Staub in das Spülrohr vermieden werden. Gemäß der DE-PS 4 63 528 werden die Belüftungsgase aus einer Ringleitung mittels Rohren senkrecht nach unten in ein konisch zulaufendes Spülrohr geleitet. Gemäß der DE-OS 25 23 495 werden die Belüftungsgase durch einen Ringspalt horizontal in das Spülrohr eingesaugt. Gemäß der SW-PS 147 942 werden die Belüftungsgase durch eine Zuleitung in ein zylindrisches Spülrohr eingeleitet und strömen nach Verlassen des Spülrohres auf einen unter der Austrittsöffnung angeordneten Prallteller. Mit diesen Vorrichtungen kann jedoch nicht verhindert werden, daß im Spülrohr Wirbelbildungen auftreten, wodurch staubhaltiges Gas in das Spülrohr eindringt und zu Verschmutzungen der Isolatorfläche führt. Gemäß der DE-PS 10 93 447 erfolgt die Zuführung der Belüftungsgase aus einem Druckraum über Düsen in das venturiartig ausgebildete Spülrohr. Dadurch wird die Wirbelbildung zwar verringert aber nicht vollständig verhindert.Various devices are known in which the insulating body is arranged in a flushing pipe into which ventilation gases are conducted which flow from the outlet opening of the flushing pipe into the gas space of the filter. The gas flow is intended to prevent dust from entering the flushing pipe. According to DE-PS 4 63 528, the ventilation gases are passed from a ring line by means of pipes vertically downwards into a tapered purge pipe. According to DE-OS 25 23 495, the ventilation gases are sucked horizontally into the purge pipe through an annular gap. According to SW-PS 147 942, the ventilation gases are introduced through a feed line into a cylindrical flushing pipe and, after leaving the flushing pipe, flow onto a baffle plate arranged under the outlet opening. With these devices, however, it can not be prevented that vortex formation occurs in the flushing pipe, which causes dust Gas penetrates the purge pipe and leads to contamination of the insulator surface. According to DE-PS 10 93 447, the ventilation gases are supplied from a pressure chamber via nozzles into the venturi-like flushing pipe. This reduces the vortex formation but does not completely prevent it.

Der Erfindung liegt die Aufgabe zugrunde, die Wirbelbildung und die dadurch verursachte Verschmutzung der Isolatoren bei allen Betriebsbedingungen mit Sicherheit zu verhindern.The invention has for its object to prevent the formation of eddies and the pollution of the insulators caused thereby with all operating conditions with certainty.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß dadurch, daß in dem Spülrohr senkrecht zur Strahlachse und symmetrisch zur Strahlachse der Düsen Prallteller unterhalb der Öffnungen der Düsen angeordnet sind. Durch eine ringförmige Anordnung der Düsen und einen runden Querschnitt des Spülrohres werden besonders günstige Strömungsverhältnisse erzielt. Der Austrittsquerschnitt des Spülrohres wird zweckmäßigerweise gerade etwas oberhalb der zur Vermeidung von Überschlägen notwendigen Größe gehalten. Bei glockenförmigen Isolatoren, die oberhalb des Spülrohres angeordnet sind, wird der Druckraum für die Zuführung der Belüftungsgase kreisringförmig ausgebildet. Die Abdichtung des Isolierkörpers gegenüber dem Filter kann dann in der Weise erfolgen, daß zwischen Kappe und Isolierkörper und Isolierkörper und Filterwandung Dichtungen gelegt werden, die unter der Belastung durch die an der Kappe befestigte Trageinrichtung einen gasdichten Abschluß ergeben. Eine Überdeckung des glockenförmigen Isolators mit einem Druckraum, die zwar auch möglich ist, ist aufwendiger. Bei schaftförmigen Isolatoren, die zum Teil oberhalb und zum Teil innerhalb des Spülrohres angeordnet sind, wird der obere Teil von dem Druckraum umschlossen. Als Belüftungsgas kann neben Luft auch im Filter gereinigtes Gas zurückgeführt werden. Die Prallteller können auch zu einer kreisringförmigen Scheibe zusammengefaßt werden. Die Düsen sollten möglichst präzise gefertigt sein.This object is achieved according to the invention in that baffle plates are arranged below the openings of the nozzles in the flushing pipe perpendicular to the jet axis and symmetrically to the jet axis of the nozzles. Particularly favorable flow conditions are achieved through an annular arrangement of the nozzles and a round cross section of the flushing pipe. The outlet cross section of the flushing pipe is expediently kept just above the size necessary to avoid flashovers. In the case of bell-shaped insulators, which are arranged above the flushing pipe, the pressure space for the supply of the ventilation gases is designed in a circular shape. The sealing of the insulating body with respect to the filter can then take place in such a way that seals are placed between the cap and the insulating body and the insulating body and the filter wall, which give a gas-tight seal under the load from the supporting device attached to the cap. Covering the bell-shaped insulator with a pressure chamber, which is also possible, is more complex. In the case of shaft-shaped insulators which are arranged partly above and partly inside the flushing pipe, the upper part is enclosed by the pressure chamber. In addition to air, cleaned gas can also be recirculated as ventilation gas. The baffle plates can also be combined into an annular disc. The nozzles should be made as precisely as possible.

Eine vorzugsweise Ausgestaltung besteht darin, daß die Oberflächen der Prallteller konkav ausgebildet sind. Dadurch werden besonders günstige Strömungsverhältnisse erzielt. Die Ränder der Prallteller können mit Schlitzen ausgestaltet werden.A preferred embodiment is that the surfaces of the baffle plates are concave. As a result, particularly favorable flow conditions are achieved. The edges of the baffle plates can be designed with slots.

Eine vorzugsweise Ausgestaltung besteht darin, daß die Prallteller in einem Abstand von 10 bis 80 mm von den Austrittsöffnungen der Düsen angeordnet sind. Dadurch werden ebenfalls besonders gute Strömungsverhältnisse erzielt.A preferred embodiment is that the baffle plates are arranged at a distance of 10 to 80 mm from the outlet openings of the nozzles. This also results in particularly good flow conditions.

Eine vorzugsweise Ausgestaltung besteht darin, daß der untere Teil des Spülrohres zylindrisch ausgebildet ist. Dadurch wird eine parallele Strömung zu der Trageinrichtung und eine günstige Ausströmung erzielt.A preferred embodiment is that the lower part of the flushing tube is cylindrical. This results in a parallel flow to the support device and a favorable outflow.

Ein bevorzugtes Verfahren zum Betreiben der erfindungsgemäßen Vorrichtung besteht darin, daß die Belüftungsgase aus dem Druckraum durch die Düsen in solcher Verteilung und Menge in das Spülrohr eingeblasen werden, daß die kinetische Energie der aus den Düsen austretenden Gasströme durch Ablenkung, Umlenkung und Verteilung auf den Pralltellern soweit umgewandelt und vernichtet wird, daß über die gesamte Querschnittsfläche der Austrittsöffnung des Spülrohres eine gleichmäßige Strömung aufrechterhalten wird. Mit diesen Maßnahmen werden günstige Strömungsverhältnisse im Hinblick auf die Verhinderung von Wirbelbildungen erzielt.A preferred method for operating the device according to the invention is that the ventilation gases are blown from the pressure chamber through the nozzles in such a distribution and quantity into the flushing pipe that the kinetic energy of the gas streams emerging from the nozzles is deflected, deflected and distributed on the baffle plates is converted and destroyed to the extent that a uniform flow is maintained over the entire cross-sectional area of the outlet opening of the flushing pipe. With these measures, favorable flow conditions are achieved with a view to preventing eddy formation.

Ein bevorzugtes Verfahren besteht darin, daß in dem Druckraum ständig ein Gasdruck aufrechtgehalten wird, der eine Druckdifferenz gegenüber dem im Gasraum des Elektrofilters herrschenden Druck von 0,1 bis 0,2 bar ergibt. Durch den bedingten hohen Drosselgrad werden durch alle Düsenbohrungen gleiche Gasmengen zugeführt und dadurch günstige Strömungsverhältnisse im Spülrohr erzielt.A preferred method is that a gas pressure is constantly maintained in the pressure chamber, which results in a pressure difference of 0.1 to 0.2 bar compared to the pressure prevailing in the gas chamber of the electrostatic filter. Due to the high degree of throttling, the same amount of gas is supplied through all nozzle bores, thereby achieving favorable flow conditions in the flushing pipe.

Ein bevorzugtes Verfahren besteht darin, daß das Belüftungsgas vor der Zufuhr in den Druckraum auf 0,08 bis 0,1 bar komprimiert und gleichzeitig erwärmt wird. Dadurch wird neben der Erzeugung guter Strömungsverhältnisse eine separate Erwärmung der Gase überflüssig.A preferred method is that the aeration gas is compressed to 0.08 to 0.1 bar and simultaneously heated before being fed into the pressure chamber. In addition to generating good flow conditions, separate heating of the gases is therefore unnecessary.

Die Erfindung wird an Hand der Figuren näher und beispielsweise erläutert.

  • Fig. 1 zeigt schematisch einen Querschnitt durch einen glockenförmigen Isolator, der auf der Filterdecke angeordnet ist, und bei dem das Spülrohr direkt im Filterraum angeordnet ist.
  • Fig. 2 zeigt schematisch einen Querschnitt durch einen schaftförmigen Isolator, der neben dem eigentlichen Filter angeordnet ist, wobei die Verbindung durch ein Verbindungsstück hergestellt wird.
The invention is explained in more detail with reference to the figures and, for example, explained.
  • Fig. 1 shows schematically a cross section through a bell-shaped insulator, which is arranged on the filter ceiling, and in which the flushing pipe is arranged directly in the filter space.
  • Fig. 2 shows schematically a cross section through a shaft-shaped insulator which is arranged next to the actual filter, the connection being established by a connecting piece.

In der Filterwandung 1 (in Fig. 1 die Decke des Filters; in Fig. 2 ein Verbindungsstück zum eigentlichen Filtergehäuse) ist eine kreisförmige Öffnung 2 angeordnet. In Fig. 1 ist über der Öffnung 2 ein glockenförmiger Isolator 3 angeordnet. In Fig. 2 ist in der Öffnung 2 ein schaftförmiger Isolator 3 angeordnet. Die Trageinrichtung 4 ist an einer Kappe 5 befestigt. Um den Isolierkörper 3 herum sind in der Filterwandung 1 kreisförmig Düsen 6 angeordnet, deren Austrittsöffnungen senkrecht nach unten gerichtet sind. Um die Düsen 6 herum ist das Spülrohr 7 unter der Filterwandung 1 gasdicht angeordnet. Sein Austrittsquerschnitt wird mit Hilfe eines konischen Zwischenstückes verringert. Der untere Teil ist zylindrisch ausgebildete In Fig. 1 mündet die Austrittsöffnung des Spülrohres 7 direkt in den Gasraum 8 des Filters; in Fig. 2 in den Gasraum des Verbindungsstückes 8a, der mit dem Gasraum 8 des Filters in Verbindung steht. Über den Düsen 6 der Fig. 1 ist ein kreisringförmiger Druckraum 9 mit Zuleitungsvorrichtung 10 für die Belüftungsgase angeordnet. In Fig. 2 ist der gesamte obere Teil des Isolators 3 von einem Druckraum 9 umschlossen. In dem Spülrohr 7 sind unter den Austrittsöffnungen der Düsen 6 senkrecht zur und symmetrisch zur Stahlachse der Düsen 6 Prallteller 11 angeordnet, deren Oberflächen konkav ausgebildet sind.A circular opening 2 is arranged in the filter wall 1 (in FIG. 1 the ceiling of the filter; in FIG. 2 a connection piece to the actual filter housing). In Fig. 1, a bell-shaped insulator 3 is arranged above the opening 2. 2, a shaft-shaped insulator 3 is arranged in the opening 2. The carrying device 4 is attached to a cap 5. Circular nozzles 6 are arranged in the filter wall 1 around the insulating body 3, the outlet openings of which are directed vertically downwards. The flushing pipe 7 is arranged gas-tight under the filter wall 1 around the nozzles 6. Its outlet cross section is reduced with the help of a conical intermediate piece. The lower part is of cylindrical design. In FIG. 1 the outlet opening of the flushing pipe 7 opens directly into the gas space 8 of the filter; in Fig. 2 in the gas space of the connector 8a, which is in communication with the gas space 8 of the filter. An annular pressure chamber 9 is located above the nozzles 6 in FIG. 1 arranged with supply device 10 for the ventilation gases. In Fig. 2, the entire upper part of the insulator 3 is enclosed by a pressure chamber 9. In the flushing pipe 7, baffle plates 11 are arranged below the outlet openings of the nozzles 6 perpendicular to and symmetrical to the steel axis of the nozzles 6, the surfaces of which are concave.

Die Vorteile der Erfindung bestehen darin, daß bei allen Betriebsbedingungen, auch bei Schwankungen des Elektrofilters, im Spülrohr mit Sicherheit eine gleichmäßige Strömung der Belüftungsgase mit Strömungsverhältnissen erzielt wird, die Wirbelbildungen im Spülrohr vermeidet, und daß deshalb mit Sicherheit kein Staub in das Spülrohr gelangt und zu Verschmutzungen der Isolatorfläche führt.The advantages of the invention are that in all operating conditions, even with fluctuations in the electrostatic precipitator, a steady flow of the ventilation gases with flow conditions is reliably achieved in the purge tube, which avoids eddy formation in the purge tube, and therefore no dust can get into the purge tube and leads to contamination of the insulator surface.

Claims (7)

1. Vorrichtung zur Verhinderung einer zur Verschmutzung führenden Wirbelbildung bei der Belüftung von Isolatoren in Elektrofiltern, bestehend aus einem über oder in einer Öffnung der Filterwandung angeordnetem Isolierkörper, einer auf dem Isolierkörper abgestützten Kappe, an der die Trageinrichtung für die spannungsführenden Teile des Elektrofilters befestigt ist, um den Isolierkörper herum in der Filterwandung mit den Austrittsöffnungen nach unten gerichtet angeordneten Düsen für die Einleitung von Belüftungsgasen, einem um die Austrittsöffnungen der Düsen herum unter der Filterwandung angeordnetem und mit der Filterwandung gasdicht verbundenem Spülrohr mit verengtem Austrittsquerschnitt, dessen Austrittsöffnung in den Gasraum des Elektrofilters oder in Verbindungsstücke zum Gasraum mündet, und einem über den Düsen angeordneten Druckraum für die Zufuhr der Belüftungsgase, dadurch gekennzeichnet, daß in dem Spülrohr (7) senkrecht zur und symmetrisch zur Strahlachse der Düsen (6) Prallteller (11) unterhalb der Öffnungen der Düsen (6) angeordnet sind.1. Device for preventing a vortex formation leading to pollution when ventilating insulators in electrostatic filters, consisting of an insulating body arranged above or in an opening of the filter wall, a cap supported on the insulating body, to which the carrying device for the live parts of the electrostatic filter is fastened , around the insulating body in the filter wall with the outlet openings directed downwards for the introduction of ventilation gases, a flush pipe arranged around the outlet openings of the nozzles under the filter wall and connected to the filter wall in a gas-tight manner, the outlet opening into the gas space of the Electrofilter or in connectors to the gas chamber, and a pressure chamber arranged above the nozzles for the supply of ventilation gases, characterized in that the flushing tube (7) bounces perpendicular to and symmetrically to the jet axis of the nozzles (6) eller (11) below the openings of the nozzles (6) are arranged. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Oberflächen der Prallteller (11) konkav ausgebildet sind.2. Device according to claim 1, characterized in that the surfaces of the baffle plates (11) are concave. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Prallteller (11) in einem Abstand von 10 bis 80 mm von den Austrittsöffnungen der Düsen angeordnet sind.3. Apparatus according to claim 1 or 2, characterized in that the baffle plates (11) are arranged at a distance of 10 to 80 mm from the outlet openings of the nozzles. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der untere Teil des Spülrohres (7) zylindrisch ausgebildet ist.4. Device according to one of claims 1 to 3, characterized in that the lower part of the flushing tube (7) is cylindrical. 5. Verfahren zum Betreiben der Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Belüftungsgase aus dem Druckraum durch die Düsen in solcher Verteilung und Menge in das Spülrohr eingeblasen werden, daß die kinetische Energie der aus den Düsen austretenden Gasströme durch Ablenkung, Umlenkung und Verteilung auf den Pralltellern soweit umgewandelt und vernichtet wird, daß über die gesamte Querschnittsfläche der Austrittsöffnung des Spülrohres eine gleichmäßige Strömung aufrechterhalten wird.5. A method of operating the device according to one of claims 1 to 4, characterized in that the ventilation gases are blown from the pressure chamber through the nozzles in such a distribution and quantity into the flushing pipe that the kinetic energy of the gas flows emerging from the nozzles by deflection , Deflection and distribution on the baffle plates is converted and destroyed to the extent that a uniform flow is maintained over the entire cross-sectional area of the outlet opening of the flushing pipe. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß in dem Druckraum ständig ein Gasdruck aufrechtgehalten wird, der eine Druckdifferenz gegenüber dem im Gasraum des Elektrofilters herrschenden Druck von 0,1 bis 0,2 bar ergibt.6. The method according to claim 5, characterized in that a gas pressure is constantly maintained in the pressure chamber, which results in a pressure difference compared to the prevailing in the gas space of the electrostatic filter from 0.1 to 0.2 bar. 7. Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß das Belüftungsgas vor der Zufuhr in den Druckraum auf 0,08 bis 0,1 bar komprimiert und gleichzeitig erwärmt wird.7. The method according to claim 5 or 6, characterized in that the ventilation gas is compressed to 0.08 to 0.1 bar and simultaneously heated before being fed into the pressure chamber.
EP79200485A 1978-10-27 1979-09-04 Device and method for avoiding a soiling turbulence during the ventilation of insulators in electrofilters Withdrawn EP0010784A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782846798 DE2846798A1 (en) 1978-10-27 1978-10-27 DEVICE AND METHOD FOR PREVENTING A POLLUTION WHICH LEADS TO POLLUTION IN THE VENTILATION OF INSULATORS IN ELECTRIC FILTERS
DE2846798 1978-10-27

Publications (1)

Publication Number Publication Date
EP0010784A1 true EP0010784A1 (en) 1980-05-14

Family

ID=6053275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200485A Withdrawn EP0010784A1 (en) 1978-10-27 1979-09-04 Device and method for avoiding a soiling turbulence during the ventilation of insulators in electrofilters

Country Status (3)

Country Link
EP (1) EP0010784A1 (en)
JP (1) JPS5559854A (en)
DE (1) DE2846798A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3209412C2 (en) * 1982-03-16 1985-10-17 Metallgesellschaft Ag, 6000 Frankfurt Device for keeping post insulators clean in electrostatic precipitators

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463528C (en) * 1927-06-19 1928-07-30 Metallbank Insulation protection for high-voltage insulators for electrical gas cleaning systems, especially for the brown coal briquette industry
DE488155C (en) * 1924-09-02 1929-12-23 Siemens Schuckertwerke Akt Ges Method and device for preventing dust deposits on the insulators of electric gas cleaners
DE505686C (en) * 1925-12-23 1930-08-23 Siemens Schuckertwerke Akt Ges Device for preventing dust deposits on the insulators of electrical gas cleaners
CH224043A (en) * 1942-02-05 1942-10-31 Porzellanfabrik Langenthal A G Isolator on electrical dust extractors.
DE1765569B1 (en) * 1968-06-11 1973-08-16 Rhein Westfael Isolatoren DEVICE FOR THE PROTECTION OF ELECTRIC FEED-THROUGH INSULATORS AGAINST HEAVY POLLUTION

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE488155C (en) * 1924-09-02 1929-12-23 Siemens Schuckertwerke Akt Ges Method and device for preventing dust deposits on the insulators of electric gas cleaners
DE505686C (en) * 1925-12-23 1930-08-23 Siemens Schuckertwerke Akt Ges Device for preventing dust deposits on the insulators of electrical gas cleaners
DE463528C (en) * 1927-06-19 1928-07-30 Metallbank Insulation protection for high-voltage insulators for electrical gas cleaning systems, especially for the brown coal briquette industry
CH224043A (en) * 1942-02-05 1942-10-31 Porzellanfabrik Langenthal A G Isolator on electrical dust extractors.
DE1765569B1 (en) * 1968-06-11 1973-08-16 Rhein Westfael Isolatoren DEVICE FOR THE PROTECTION OF ELECTRIC FEED-THROUGH INSULATORS AGAINST HEAVY POLLUTION

Also Published As

Publication number Publication date
JPS5559854A (en) 1980-05-06
DE2846798A1 (en) 1980-05-08

Similar Documents

Publication Publication Date Title
DE1757006A1 (en) Equipment for chimneys and ventilation systems
EP0253145A1 (en) Apparatus for treatment of material surfaces by electric corona discharge
DE3238149C2 (en) Device for atomizing liquids
DE2646798A1 (en) Electric charging device for liq. or solid particles in air stream - has particles charged with one polarity by first electrode and with opposite polarity by second electrode
DE4310470C1 (en) Surface-treatment equipment with spray nozzles - has common extraction cowl containing spray nozzles and outer ring of air nozzles and central top extraction pipe
EP0066164B1 (en) Method of heating the surface of a substrate by means of a hot gas jet, particularly with simultaneous supply of coating material using the flame spraying process, and burner for the realization of said method
DE4109349A1 (en) METHOD FOR SEPARATING PARTICLES FROM A FLUE GAS FLOW AND ELECTROSTATIC DEPOSIT DEVICE WITH WET MOISTURED WALLS AND LIQUID RECIRCULATION
DE1577739B2 (en) Electrostatic spray device
DE2139824C2 (en) Device for leading a voltage supply conductor through the cover of an electrostatic precipitator
EP0854782B1 (en) Device for treating flat substrates by a corona station
EP0010784A1 (en) Device and method for avoiding a soiling turbulence during the ventilation of insulators in electrofilters
DE3524861C2 (en) Electrostatic separator
DE1093447B (en) Device for preventing the formation of eddies leading to pollution during the ventilation of insulators in electrical gas cleaning or emulsion separation systems
DE19731474C1 (en) Method of operating corner burners for tangential firing
EP1515806B1 (en) Leadthrough for electric high-voltage through a wall separating an environment area from a process area
DE571158C (en) Centrifugal wet electrostatic precipitator
DE2530788C2 (en) Apparatus for wet cleaning of a dust-laden gas and method for its use
DE3546231A1 (en) Powder spray gun
DE2263585A1 (en) METHOD FOR ELECTROSTATICALLY APPLICATION OF POWDER COATING MATERIALS TO AN ARTICLE
DE2749400C3 (en) Electrostatic spray device with protective gas jacket
DE3918452A1 (en) Washing rising gases - by pressurised transverse liq. sprays from annular jets at intervals up column
DE3209412C2 (en) Device for keeping post insulators clean in electrostatic precipitators
DE102005013987B3 (en) Apparatus for neutralizing electrically charged aerosol particles flowing in tube, comprising ante-chamber(s) supplied with ionized gas over gas-permeable region(s) of tube side(s)
DE4407152C1 (en) Device for insulating electrostatic separators
DE2903754C2 (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn
RIN1 Information on inventor provided before grant (corrected)

Inventor name: HARTMANN, WOLFGANG