WO2009043332A1 - Cleaning device for a dust filter - Google Patents

Cleaning device for a dust filter Download PDF

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Publication number
WO2009043332A1
WO2009043332A1 PCT/DE2008/001596 DE2008001596W WO2009043332A1 WO 2009043332 A1 WO2009043332 A1 WO 2009043332A1 DE 2008001596 W DE2008001596 W DE 2008001596W WO 2009043332 A1 WO2009043332 A1 WO 2009043332A1
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WO
WIPO (PCT)
Prior art keywords
cleaning device
annular chamber
flow channel
nozzle gap
nozzle
Prior art date
Application number
PCT/DE2008/001596
Other languages
German (de)
French (fr)
Inventor
Theo Schrooten
Rainer Kräbs
Original Assignee
Intensiv-Filter Gmbh & Co. Kg
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 Intensiv-Filter Gmbh & Co. Kg filed Critical Intensiv-Filter Gmbh & Co. Kg
Publication of WO2009043332A1 publication Critical patent/WO2009043332A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04—Cleaning filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air

Definitions

  • the invention relates to a cleaning device for a dust filter, with a flow channel extending between an inlet opening and an outlet opening and an annular chamber arranged around the flow channel, from which nozzle gaps distributed over the circumference lead into the flow channel below the inlet opening, wherein the annular chamber is made two in a connection region pressure-tight interconnected ring elements composed, of which the closer to the outlet opening ring element at the same time forms the one wall of the nozzle gap.
  • Such cleaning devices are known from EP 0 034 645 B1 and EP 1 042 042 B1. They work according to the so-called Coanda principle and are used to clean the filter bags or filter cartridges of dust filters, for which purpose the cleaning device is arranged above the upwardly open filter tube or the filter cartridge.
  • the invention is based on the invention to provide a cleaning device for a dust filter which is also suitable for increased hygiene requirements.
  • Such a cleaning device is also able to meet increased hygiene standards, since it can come in the annular chamber, such as after a previous Nassüüiung, no significant bacterial contamination. This in turn is due to the fact that there is no accumulation of liquid and thus the emergence of a microorganism promoting environment.
  • Figure 1 shows the cleaning device partly in a section, partly in a view
  • Figure 2 is an enlarged detail shown in Figure 1 and
  • FIG. 3 is a plan view, partly in section, of the cleaning device according to FIG. 1.
  • Figure 1 shows a side view of a Coanda injector 1, which is connected at two points to a arranged above the Coanda injector 1 compressed gas line 2.
  • the Coanda injector 1 is designed substantially annular, with its central axis 4, the central axis 5 of the compressed gas line 2 intersects at a right angle.
  • Part of the Coanda injector is an annular chamber 7, which is arranged coaxially to the central axis 4 of the Coanda 1 injector.
  • the annular chamber 7 is connected to the interior of the compressed gas line 2 via gas inlet connection pieces 10a, 10b. Compressed air, as illustrated in FIGS.
  • a plurality of compressed gas lines 2 are arranged parallel to one another in the filter housing, in order to guide compressed air into an adjacent row of such Coanda injectors 1 in this way.
  • a whole "field" in the housing of the dust filter can be equipped with Coanda injectors, wherein each such injector 1 is arranged above a filter element of the dust filter, as for example in EP 0 034 645 B1 illustrated.
  • the annular chamber 7 of the Coanda injector is composed of two pressure-tightly interconnected in an outer connection region 12 ring elements 14, 15 together.
  • the upper ring member 14 has, integrally formed thereon, via the aforementioned gas inlet nozzle 10a, 10b for connection to the above-running compressed gas line 2.
  • This ring member 14 has a dome-shaped curved cross section, wherein at two opposite locations of this dome-shaped curved cross-section, the gas inlet nozzle 10a , 10b are formed.
  • the ring element 14 is a sheet-metal shaped part which preferably has its shape in a cold-forming process.
  • the other ring member 15 may consist of a one-piece sheet metal part. It can be, viewed from radially outside to radially inside, divided into four sections.
  • the radially outer portion 20 of the ring member 15 is part of the connection portion 12 and is designed in such a way that in this area the ring member 15 is pressure-tightly connected to the upper ring member 14.
  • the outer edge of the ring member 14 is crimped around the portion 20 of the ring member 15 around.
  • a section 21 connects radially inwardly, on which the annular chamber 7 facing side 24 of the ring member 15 is horizontal and flat. This section 21 extends up to a nozzle gap 25, at which the compressed air or the compressed gas exits from the annular chamber 7.
  • the flat side 24 of the section 21 forms at the same time the lower wall of the nozzle gap 25th
  • the ring element 15 merges integrally into the cylindrical wall 23 of a flow channel 27 in a further section 22.
  • the transition section 22 is designed in a quarter-circle in cross-section, so as to allow the emerging from the nozzle gap 25 at high speed gas jet interference-free deflection in the direction of the outlet opening 18 of the flow channel 27.
  • the gas outlet from the nozzle gap 25 also takes place in a pulse-like manner and at high speed.
  • secondary air is drawn through the inlet opening 17 from above into the flow channel 27, so that from the outlet opening 18 an increased amount of gas exits with appropriate speed (Coanda effect).
  • the inflow of the entrained secondary air into the inlet opening 17 of the Coanda injector is illustrated in FIG. 3 with reference to the flow arrows S.
  • the cylindrical wall 23 of the ring member 15 takes place in the direction of the outlet opening 18 in a separate, likewise cylindrical pipe section 30.
  • the pipe section 30 is welded from below to the wall 23 of the ring member 15.
  • the top 24 may also be radially inward, i. towards the central axis 4, slightly sloping, approximately at an angle to the horizontal of less than 3 °. It is crucial that no place within the annular chamber 7 is arranged lower than the nozzle gap 25th
  • the nozzle gap 25 may be a single, circumferential nozzle gap of the gap thickness S1. It is also possible to dispose uniformly distributed over the circumference a plurality of individual nozzle gaps from which the compressed gas exits radially inwards.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Disclosed is a cleaning device for a dust filter, comprising a duct (27) that extends between an inlet (17) and an outlet (18), and an annular chamber (7) which is arranged around the duct and from which nozzle gaps (25) extend into the duct (27) below the inlet (17). The annular chamber (7) is composed of two annular elements (14, 15) which are pressure-tightly interconnected in a connection zone (12). The annular element (15) lying closer to the outlet (18) at the same time forms one wall of the nozzle gap (25). In order to design a cleaning device that meets high hygiene standards, the side (24) of the annular element (15) facing the annular chamber (7) always extends horizontally or slopes along the radial section from the connection zone (12) to the nozzle gap (25).

Description

Reinigungsvorrichtung für ein Staubfilter Cleaning device for a dust filter
Die Erfindung betrifft eine Reinigungsvorrichtung für ein Staubfilter, mit einem sich zwischen einer Eintrittsöffnung und einer Austrittsöffnung erstreckten Strömungskanal und einer um den Strömungskanal herum angeordneten Ringkammer, von der aus über den Umfang verteilte Düsenspalte in den Strömungskanal unterhalb der Eintrittsöffnung führen, wobei sich die Ringkammer aus zwei in einem Verbindungsbereich druckdicht miteinander verbundenen Ringelementen zusammensetzt, von denen das näher zur Austrittsöffnung liegende Ringelement zugleich die eine Wandung des Düsenspalts bildet.The invention relates to a cleaning device for a dust filter, with a flow channel extending between an inlet opening and an outlet opening and an annular chamber arranged around the flow channel, from which nozzle gaps distributed over the circumference lead into the flow channel below the inlet opening, wherein the annular chamber is made two in a connection region pressure-tight interconnected ring elements composed, of which the closer to the outlet opening ring element at the same time forms the one wall of the nozzle gap.
Derartige Reinigungsvorrichtungen sind aus der EP 0 034 645 B1 und der EP 1 042 042 B1 bekannt. Sie arbeiten nach dem so genannten Coanda-Prinzip und werden zur Reinigung der Filterschläuche oder Filterkerzen von Staubfiltern eingesetzt, wozu die Reinigungsvorrichtung oberhalb des nach oben offenen Filterschlauchs oder der Filterkerze angeordnet ist.Such cleaning devices are known from EP 0 034 645 B1 and EP 1 042 042 B1. They work according to the so-called Coanda principle and are used to clean the filter bags or filter cartridges of dust filters, for which purpose the cleaning device is arranged above the upwardly open filter tube or the filter cartridge.
Die Einsatzmöglichkeiten derartiger Reinigungsvorrichtungen sind nicht begrenzt und erfassen alle Bereiche, in denen Staubfilter industriell eingesetzt werden. Einer dieser Bereiche ist die Nahrungsmittelindustrie, z.B. die Milch zu Milchpulver verarbeitende Industrie. Für den Einsatz in der Nahrungsmittelindustrie wie auch in der pharmazeutischen Industrie gelten besonders strenge Hygieneanforderungen. Es kann zu Problemen mit Verkeimungen kommen, wenn nach der Nassreinigung der verfahrenstechnischen Anlage Flüssigkeitsreste in Anlagenteilen verbleiben. In diesem Zusammenhang wurde beobachtet, dass es bei gattungsgemäßen Reinigungsvorrichtungen dann unter ungünstigen Voraussetzungen zu Keimbildungen im Bereich der Ringkammer kommen kann, wenn dort Reste von Waschflüssigkeit längere Zeit verbleiben.The applications of such cleaning devices are not limited and cover all areas where dust filters are used industrially. One of these areas is the food industry, e.g. the milk to milk powder processing industry. For use in the food industry as well as in the pharmaceutical industry, particularly stringent hygiene requirements apply. There can be problems with microbial contamination if, after wet cleaning of the process plant, liquid residues remain in plant components. In this context, it has been observed that in the case of generic cleaning devices, under unfavorable conditions, nucleation in the area of the annular chamber can occur if residues of washing liquid remain there for a longer time.
Der Erfindung liegt die A u f g a b e zugrunde, eine auch für erhöhte Hygieneanforderungen geeignete Reinigungsvorrichtung für ein Staubfilter zu schaffen.The invention is based on the invention to provide a cleaning device for a dust filter which is also suitable for increased hygiene requirements.
Zur L ö s u n g dieser Aufgabe wird bei einer Reinigungsvorrichtung der eingangs angegebenen Art vorgeschlagen, dass die der Ringkammer zugewandte Seite des Ringelements entlang des radialen Weges vom Verbindungsbereich zum Düsenspalt stets horizontal oder abschüssig verläuft.To solve this problem is proposed in a cleaning device of the type specified that the annular chamber facing side of the ring member along the radial path from the connecting portion to the nozzle gap is always horizontal or sloping.
Figure imgf000003_0001
Eine solche Reinigungsvorrichtung vermag auch erhöhte Hygienestandards zu erfüllen, da es in der Ringkammer, etwa nach einer vorangegangenen Nassspüiung, zu keiner nennenswerten Verkeimung kommen kann. Dies wiederum ist darauf zurückzuführen, dass es dort zu keinem Ansammeln von Flüssigkeit und damit dem Entstehen einer die Verkeimung fördernden Umgebung kommt.
Figure imgf000003_0001
Such a cleaning device is also able to meet increased hygiene standards, since it can come in the annular chamber, such as after a previous Nassüüiung, no significant bacterial contamination. This in turn is due to the fact that there is no accumulation of liquid and thus the emergence of a microorganism promoting environment.
Vorteilhafte Ausgestaltungen der Reinigungsvorrichtung sind in den Unteransprüchen angegebenen.Advantageous embodiments of the cleaning device are specified in the subclaims.
Weitere Einzelheiten und Vorteile einer erfindungsgemäßen Reinigungsvorrichtung finden sich in der nachfolgenden Beschreibung eines auf der Zeichnung dargestellten Ausführungsbeispieles. Im Einzelnen zeigenFurther details and advantages of a cleaning device according to the invention can be found in the following description of an embodiment shown in the drawing. Show in detail
Figur 1 die Reinigungsvorrichtung teilweise in einem Schnitt, teilweise in einer Ansicht; Figur 2 eine vergrößert dargestellte Einzelheit aus Figur 1 undFigure 1 shows the cleaning device partly in a section, partly in a view; Figure 2 is an enlarged detail shown in Figure 1 and
Figur 3 eine teils geschnitten dargestellte Draufsicht auf die Reinigungsvorrichtung nach Figur 1.FIG. 3 is a plan view, partly in section, of the cleaning device according to FIG. 1.
Der grundsätzliche Aufbau sowie die grundsätzliche Arbeitsweise der Druckluft- Reinigungsvorrichtung, welche nach dem Coanda-Prinzip arbeitet, ist in der EP 1 042 042 B1 beschrieben, weshalb insoweit auf die dortigen Erläuterungen Bezug genommen wird.The basic structure and the basic operation of the compressed air cleaning device, which operates according to the Coanda principle, is described in EP 1 042 042 B1, which is why in this respect reference is made to the explanations there.
Figur 1 zeigt anhand einer Seitenansicht einen Coanda-Injektor 1 , der an zwei Stellen an eine oberhalb des Coanda-Injektors 1 angeordnete Druckgasleitung 2 angeschlossen ist. Der Coanda-Injektor 1 ist im Wesentlichen ringförmig gestaltet, wobei seine Mittelachse 4 die Mittelachse 5 der Druckgasleitung 2 unter einem rechten Winkel kreuzt. Bestandteil des Coanda-Injektors ist eine Ringkammer 7, welche koaxial zu der Mittelachse 4 des Coanda- Injektors 1 angeordnet ist. An zwei Orten 9a, 9b (Figur 3), die, bezogen auf die Mittelachse 4, einander um 180° gegenüberliegen, ist die Ringkammer 7 über Gaseinlassstutzen 10a, 10b mit dem Inneren der Druckgasleitung 2 verbunden. Über die beiden Gaseinlassstutzen 10a, 10b kann Druckluft, wie dies in den Figuren 1 und 3 mittels Strömungspfeilen illustriert ist, an den beiden Orten in die Ringkammer 7 einströmen. Dies geschieht im Betrieb schlagartig, da die Druckgasleitung 2 über ein sehr schnell schaltendes Ventil an eine Druckluftquelle mit hoher Druckkapazität angeschlossen ist. Bei Öffnen des schnell schaltenden Ventils gelangt schlagartig Druckluft oder ein anderes Druckgas in die Druckgasleitung 2, und über die Gaseinlassstutzen 10a, 10b in die jeweilige Ringkammer 7. Selbstverständlich sind an ein- und dieselbe Druckgasleitung 2 in Reihe mehrere derartige Coanda-Injektoren 1 angeschlossen, z.B. je nach der Größe des Staubfilters zehn bis zwanzig derartige Coanda-Injektoren. Zudem sind mehrere Druckgasleitungen 2 parallel zueinander in dem Filtergehäuse angeordnet, um auf diese Weise Druckluft auch in eine benachbarte Reihe derartiger Coanda-Injektoren 1 zu leiten. Auf diese Weise lässt sich ein ganzes „Feld" im Gehäuse des Staubfilters mit Coanda-Injektoren bestücken, wobei jeweils ein solcher Injektor 1 oberhalb eines Filterelements des Staubfilters angeordnet ist, wie dies z.B. in der EP 0 034 645 B1 illustriert ist.Figure 1 shows a side view of a Coanda injector 1, which is connected at two points to a arranged above the Coanda injector 1 compressed gas line 2. The Coanda injector 1 is designed substantially annular, with its central axis 4, the central axis 5 of the compressed gas line 2 intersects at a right angle. Part of the Coanda injector is an annular chamber 7, which is arranged coaxially to the central axis 4 of the Coanda 1 injector. At two locations 9a, 9b (FIG. 3), which lie opposite one another by 180 ° relative to the center axis 4, the annular chamber 7 is connected to the interior of the compressed gas line 2 via gas inlet connection pieces 10a, 10b. Compressed air, as illustrated in FIGS. 1 and 3 by means of flow arrows, can flow into the annular chamber 7 at the two locations via the two gas inlet stubs 10a, 10b. This happens abruptly in operation, since the compressed gas line 2 is connected via a very fast switching valve to a compressed air source with high pressure capacity. When the fast-switching valve opens, compressed air or another pressurized gas suddenly enters the compressed gas line 2, and via the gas inlet nozzles 10a, 10b into the respective annular chamber 7. Of course, several such Coanda injectors 1 are connected to one and the same compressed gas line 2 in series, for example, depending on the size of the dust filter ten to twenty such Coanda injectors. In addition, a plurality of compressed gas lines 2 are arranged parallel to one another in the filter housing, in order to guide compressed air into an adjacent row of such Coanda injectors 1 in this way. In this way, a whole "field" in the housing of the dust filter can be equipped with Coanda injectors, wherein each such injector 1 is arranged above a filter element of the dust filter, as for example in EP 0 034 645 B1 illustrated.
Die Ringkammer 7 des Coanda-Injektors setzt sich aus zwei in einem äußeren Verbindungsbereich 12 druckdicht miteinander verbundenen Ringelementen 14, 15 zusammen. Das obere Ringelement 14 verfügt, einstückig daran angeformt, über die bereits erwähnten Gaseinlassstutzen 10a, 10b zur Verbindung mit der oberhalb verlaufenden Druckgasleitung 2. Dieses Ringelement 14 weist einen kuppeiförmig gewölbten Querschnitt auf, wobei an zwei einander gegenüberliegenden Orten dieses kuppeiförmig gewölbten Querschnitts die Gaseinlassstutzen 10a, 10b angeformt sind. Bei dem Ringelement 14 handelt es sich um ein Blechformteil, welches seine Gestalt vorzugsweise in einem Kaltformverfahren erhält.The annular chamber 7 of the Coanda injector is composed of two pressure-tightly interconnected in an outer connection region 12 ring elements 14, 15 together. The upper ring member 14 has, integrally formed thereon, via the aforementioned gas inlet nozzle 10a, 10b for connection to the above-running compressed gas line 2. This ring member 14 has a dome-shaped curved cross section, wherein at two opposite locations of this dome-shaped curved cross-section, the gas inlet nozzle 10a , 10b are formed. The ring element 14 is a sheet-metal shaped part which preferably has its shape in a cold-forming process.
Auch das andere Ringelement 15 kann aus einem einstückigen Blechformteil bestehen. Es lässt sich, von radial außen nach radial innen betrachtet, in insgesamt vier Abschnitte unterteilen. Der radial außen liegende Abschnitt 20 des Ringelements 15 ist Bestandteil des Verbindungsbereichs 12 und ist in der Weise gestaltet, dass in diesem Bereich das Ringelement 15 druckfest mit dem oberen Ringelement 14 verbunden ist. Zu diesem Zweck ist der Außenrand des Ringelements 14 um den Abschnitt 20 des Ringelements 15 herum gebördelt.Also, the other ring member 15 may consist of a one-piece sheet metal part. It can be, viewed from radially outside to radially inside, divided into four sections. The radially outer portion 20 of the ring member 15 is part of the connection portion 12 and is designed in such a way that in this area the ring member 15 is pressure-tightly connected to the upper ring member 14. For this purpose, the outer edge of the ring member 14 is crimped around the portion 20 of the ring member 15 around.
An den äußeren Abschnitt 20 schließt sich nach radial innen ein Abschnitt 21 an, auf welchem die der Ringkammer 7 zugewandte Seite 24 des Ringelements 15 horizontal und eben verläuft. Dieser Abschnitt 21 erstreckt sich bis zu einem Düsenspalt 25, an dem die Druckluft bzw. das Druckgas aus der Ringkammer 7 austritt. Die flach gestaltete Seite 24 des Abschnitts 21 bildet hierbei zugleich die untere Wandung des Düsenspalts 25.At the outer portion 20, a section 21 connects radially inwardly, on which the annular chamber 7 facing side 24 of the ring member 15 is horizontal and flat. This section 21 extends up to a nozzle gap 25, at which the compressed air or the compressed gas exits from the annular chamber 7. The flat side 24 of the section 21 forms at the same time the lower wall of the nozzle gap 25th
Stromab des Düsenspalts 25 geht das Ringelement 15 in einem weiteren Abschnitt 22 einstückig in die zylindrische Wandung 23 eines Strömungskanals 27 über. Hierbei ist der Übergangsabschnitt 22 im Querschnitt viertelkreisförmig gestaltet, um so dem aus dem Düsenspalt 25 mit hoher Geschwindigkeit austretenden Gasstrahl eine störungsfreie Umlenkung in Richtung auf die Austrittsöffnung 18 des Strömungskanals 27 zu ermöglichen. Entsprechend der Druckversorgung über die ventilgesteuerte Druckgasleitung 2 erfolgt auch der Gasaustritt aus dem Düsenspalt 25 impulsartig und mit hoher Geschwindigkeit. Hierbei wird Sekundärluft über die Eintrittsöffnung 17 von oben her in den Strömungskanal 27 eingezogen, so dass aus der Austrittsöffnung 18 eine erhöhte Gasmenge mit entsprechender Geschwindigkeit austritt (Coanda-Effekt). Das Einströmen der mitgerissenen Sekundärluft in die Eintrittsöffnung 17 des Coanda-Injektors ist in Figur 3 anhand der Strömungspfeile S illustriert.Downstream of the nozzle gap 25, the ring element 15 merges integrally into the cylindrical wall 23 of a flow channel 27 in a further section 22. In this case, the transition section 22 is designed in a quarter-circle in cross-section, so as to allow the emerging from the nozzle gap 25 at high speed gas jet interference-free deflection in the direction of the outlet opening 18 of the flow channel 27. Corresponding to the pressure supply via the valve-controlled compressed gas line 2, the gas outlet from the nozzle gap 25 also takes place in a pulse-like manner and at high speed. Here, secondary air is drawn through the inlet opening 17 from above into the flow channel 27, so that from the outlet opening 18 an increased amount of gas exits with appropriate speed (Coanda effect). The inflow of the entrained secondary air into the inlet opening 17 of the Coanda injector is illustrated in FIG. 3 with reference to the flow arrows S.
Die zylindrische Wandung 23 des Ringelements 15 findet in Richtung auf die Austrittsöffnung 18 ihre Fortsetzung in einem separaten, ebenfalls zylindrischen Rohrstück 30. Das Rohrstück 30 ist von unten an die Wandung 23 des Ringelements 15 angeschweißt.The cylindrical wall 23 of the ring member 15 takes place in the direction of the outlet opening 18 in a separate, likewise cylindrical pipe section 30. The pipe section 30 is welded from below to the wall 23 of the ring member 15.
Da die der Ringkammer 7 zugewandte Oberseite 24 des unteren Ringelements 15 bis zum Düsenspalt 25 horizontal verläuft, kann sich Flüssigkeit dort nicht ansammeln und eine dieSince the annular chamber 7 facing top 24 of the lower ring member 15 extends horizontally to the nozzle gap 25, liquid can not accumulate there and a the
Verkeimung fördernde Atmosphäre bilden. Vielmehr können etwaige Flüssigkeitsreste stets über den Düsenspalt 25 ablaufen und damit entweichen. Um diesen Effekt zu verstärken, kann die Oberseite 24 auch nach radial innen, d.h. zu der Mittelachse 4 hin, leicht abschüssig verlaufen, etwa unter einem Winkel zur Horizontalen von weniger als 3°. Entscheidend ist, dass kein Ort innerhalb der Ringkammer 7 tiefer angeordnet ist, als der Düsenspalt 25.Make microbial promoting atmosphere. Rather, any liquid residues can always run over the nozzle gap 25 and thus escape. To enhance this effect, the top 24 may also be radially inward, i. towards the central axis 4, slightly sloping, approximately at an angle to the horizontal of less than 3 °. It is crucial that no place within the annular chamber 7 is arranged lower than the nozzle gap 25th
Bei dem Düsenspalt 25 kann es sich um einen einzigen, umlaufenden Düsenspalt der Spaltdicke S1 handeln. Ebenso ist es möglich, über den Umfang gleichmäßig verteilt eine Vielzahl einzelner Düsenspalte anzuordnen, aus denen das Druckgas radial nach innen austritt. The nozzle gap 25 may be a single, circumferential nozzle gap of the gap thickness S1. It is also possible to dispose uniformly distributed over the circumference a plurality of individual nozzle gaps from which the compressed gas exits radially inwards.
Bezugszeichen listeReference number list
1 Coanda-Injektor1 Coanda injector
2 Druckgasleitung2 compressed gas line
4 Mittelachse4 central axis
5 Mittelachse5 central axis
7 Ringkammer7 annular chamber
9a Ort9a place
9b Ort9b place
10a Gaseinlassstutzen10a gas inlet
10b Gaseinlassstutzen10b gas inlet
12 Verbindungsbereich12 connection area
14 Ringelement14 ring element
15 Ringelement15 ring element
17 Eintrittsöffnung17 entrance opening
18 Austrittsöffnung18 outlet opening
20 Abschnitt20 section
21 Abschnitt21 section
22 Abschnitt22 section
23 Wandung23 wall
24 Seite24 page
25 Düsenspalt25 nozzle gap
27 Strömungskanal27 flow channel
30 Rohrstück30 pipe section
S StrömungS flow
S1 Dicke des Düsenspalts S1 thickness of the nozzle gap

Claims

Ansprüche claims
1. Reinigungsvorrichtung für ein Staubfilter, mit einem sich zwischen einer Eintrittsöffnung (17) und einer Austrittsöffnung (18) erstreckenden Strömungskanal (27) und einer um den Strömungskanal (27) herum angeordneten Ringkammer (7), von der aus über den Umfang verteilte Düsenspalte (25) in den Strömungskanal (27) unterhalb der Eintrittsöffnung (17) führen, wobei sich die Ringkammer (7) aus zwei in einem Verbindungsbereich (12) druckdicht miteinander verbundenen Ringelementen (14, 15) zusammensetzt, von denen das näher zur Austrittsöffnung (18) liegendeA cleaning device for a dust filter, comprising a flow channel (27) extending between an inlet opening (17) and an outlet opening (18) and an annular chamber (7) arranged around the flow channel (27), from the nozzle column distributed over the circumference (25) into the flow channel (27) below the inlet opening (17), wherein the annular chamber (7) consists of two in a connecting region (12) pressure-tight interconnected ring elements (14, 15), of which the closer to the outlet opening ( 18) lying
Ringelement (15) zugleich die eine Wandung des Düsenspalts (25) bildet, dad urch geken nzeichnet, dass die der Ringkammer (7) zugewandte Seite (24) des Ringelements (15) entlang des radialen Weges vom Verbindungsbereich (12) zum Düsenspalt (25) stets horizontal oder abschüssig verläuft.Ring element (15) at the same time forms the one wall of the nozzle gap (25), characterized in that the annular chamber (7) facing side (24) of the ring element (15) along the radial path from the connecting region (12) to the nozzle gap (25 ) always runs horizontally or downhill.
2. Reinigungsvorrichtung nach Anspruch 1 , dad u rch gekennzei chnet, dass die der Ringkammer (7) zugewandte Seite (24) des Ringelements (15) stromab des Düsenspalts (25) mehr und mehr abfällt.2. Cleaning device according to claim 1, dad u rch gekennzei chnet that the annular chamber (7) facing side (24) of the ring member (15) downstream of the nozzle gap (25) more and more drops.
3. Reinigungsvorrichtung nach Anspruch 1 oder 2, dad u rch g ekennzeichnet, dass das Ringelement (15) stromab des Düsenspalts (25) in einer Viertelkreisbiegung einstückig in die Wandung (23) des Strömungskanals (27) übergeht.3. Cleaning device according to claim 1 or 2, dad u rch g ekennzeichnet that the ring element (15) downstream of the nozzle gap (25) in a Viertelkreisbiegung integrally into the wall (23) of the flow channel (27) passes.
4. Reinigungsvorrichtung nach einem der Ansprüche 1 bis 3, dad urch gekennzeichnet, dass das andere Ringelement (14) einen kuppeiförmig gewölbten Querschnitt aufweist.4. Cleaning device according to one of claims 1 to 3, dad urch in that the other ring element (14) has a dome-shaped curved cross-section.
5. Reinigungsvorrichtung nach Anspruch 4, dadu rch g eken nzeichnet, dass an zwei Orten (9a, 9b) des kuppeiförmig gewölbten Querschnitts Gaseinlassstutzen (10a, 10b) angeformt sind, und dass die Gaseinlassstutzen (10a, 10b), bezogen auf die Mittelachse (4) des Strömungskanals (27), einander um 180° gegenüberliegen. 5. Cleaning device according to claim 4, characterized in that gas inlet nozzles (10a, 10b) are integrally formed at two locations (9a, 9b) of the dome-shaped cross section, and in that the gas inlet nozzles (10a, 10b), relative to the central axis ( 4) of the flow channel (27), facing each other by 180 °.
PCT/DE2008/001596 2007-10-02 2008-10-02 Cleaning device for a dust filter WO2009043332A1 (en)

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DE102007047276A DE102007047276A1 (en) 2007-10-02 2007-10-02 Cleaning device for a dust filter
DE102007047276.7 2007-10-02

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JP2017087212A (en) * 2012-08-07 2017-05-25 株式会社アクロス商事 Air amplification device for bag filter and air amplification system for bag filter with use of air amplification device for bag filter

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DE102017100583A1 (en) 2017-01-13 2018-07-19 Himenviro Deutschland Gmbh Cleaning device for a dust filter
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DE2104758A1 (en) * 1970-11-04 1972-05-10 Pausch, Josef, Hopkins,Minn. (V.St.A.) Method for cleaning permeable filters and apparatus for carrying out the method
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Publication number Priority date Publication date Assignee Title
JP2017087212A (en) * 2012-08-07 2017-05-25 株式会社アクロス商事 Air amplification device for bag filter and air amplification system for bag filter with use of air amplification device for bag filter
JP2017100134A (en) * 2012-08-07 2017-06-08 株式会社アクロス商事 Bag-filter-dedicated air amplifying device and bag-filter-dedicated air amplifying system using the same
DE102015111825A1 (en) 2015-07-21 2017-01-26 Himenviro Deutschland Gmbh Cleaning device for a dust filter
US9789431B2 (en) 2015-07-21 2017-10-17 Himenviro Deutschland Gmbh Cleaning device for a dust filter

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