EP0429492A1 - Filter cartridge - Google Patents

Filter cartridge

Info

Publication number
EP0429492A1
EP0429492A1 EP89908972A EP89908972A EP0429492A1 EP 0429492 A1 EP0429492 A1 EP 0429492A1 EP 89908972 A EP89908972 A EP 89908972A EP 89908972 A EP89908972 A EP 89908972A EP 0429492 A1 EP0429492 A1 EP 0429492A1
Authority
EP
European Patent Office
Prior art keywords
filter
filter cartridge
air
interior
jacket
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.)
Pending
Application number
EP89908972A
Other languages
German (de)
French (fr)
Inventor
Karl-Heinz Stanelle
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0429492A1 publication Critical patent/EP0429492A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F25/00—Storing agricultural or horticultural produce; Hanging-up harvested fruit
    • A01F25/16—Arrangements in forage silos
    • A01F25/22—Ventilating arrangements
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4281—Venturi's or systems showing a venturi effect
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
    • 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
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • 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 filter cartridge for cleaning the dust removal filter of a silo.
  • the cleaning is carried out by means of intermittent air blown into the filter cartridge, the air being supplied via an air nozzle which is present above the filter cartridge.
  • Such a taubungsfi 1 ter is used for filtering the exhaust air when pneumatically filling a silo with a pulverized bulk material such as. B. cement used.
  • a pulverized bulk material such as. B. cement used.
  • the air used as the carrier medium during filling flows together with the filling material from the outside against the filter surface of the filter, which represents a filter jacket. Since only the air can escape through the filter to the outside, the contents are deposited on the outside of the filter surface. To prevent the filter from becoming ineffective, it must be cleaned from time to time.
  • filter cartridges with a diameter as small as possible are therefore desirable.
  • the filter effect depends on the size of the filter jacket.
  • Fewer filter cartridges require larger filter cartridges with a comparable filter surface.
  • the size of the diameter of a filter cartridge is practically irrelevant for the filtering process; for cleaning, however, enlarging the diameter of a filter cartridge has an unfavorable effect, since the nozzle arranged above the filter cartridge must be designed to be appropriately large in terms of its air throughput.
  • the invention has for its object filter cartridges for Specify filters that are both optimal in terms of their filtering effect and in terms of their cleaning effort.
  • a filter cartridge for cleaning the dedusting filter of a silo of the type mentioned at the outset it is accordingly characterized in that there is at least one recess body in the interior of a filter cartridge which has practically no contact with the filter jacket of the filter cartridge and which is closed on all sides or is positioned with its opening with respect to the air nozzle in the filter cartridge in such a way that no air can be blown into it through the air nozzle.
  • the recess body reduces the interior of the filter cartridge, so that the excess pressure required for cleaning inside the filter cartridge can be built up with a correspondingly reduced amount of air and thus more quickly.
  • the at least one air nozzle present above the filter cartridge can be designed for a smaller air throughput. Since the recess body has practically no contact with the filter jacket of the filter cartridge, the filter movement is not impaired. This makes it possible to use filter cartridges of relatively large diameter, which leads to a reduced total number of filter cartridges in a filer. This has significant economic advantages.
  • a particularly advantageous development of the invention is characterized in that the recess body, which extends in the longitudinal direction of the filter cartridge through the entire interior of the filter cartridge and through the interior of the venturi nozzle, is arranged centrally within the filter cartridge, and that at least two partition walls are arranged separately from each other, which are flat and each with their one end face on the inside of the F 1 termantel s or the inside of the venturi nozzle and with their opposite end face on the outside of the recess body, butting, whereby every wall is airtight on the recess body.
  • the filter cartridge but also the venturi nozzle arranged above the same is thus divided by the recess body and the partition walls into several interior areas in a structurally simple manner.
  • the recess body can be used not only to reduce the interior volume, but also as the air reservoir required in the prior art mentioned for controlling the air nozzles.
  • the filter containing the filter cartridge can thus be made compact in a desirable manner.
  • the invention is described and explained in more detail below with reference to the embodiment shown in the drawing.
  • the single figure shows a perspective schematic representation of a filter cartridge which is arranged on the schematically represented roof of a silo.
  • the hollow cylindrical housing of a filter 12 is mounted on a silo roof 10.
  • the interior of the filter 12 forms a unit with the interior of the silo.
  • a filter cartridge 16 which is open at the top, projects downward into the filter 12 from the ceiling 14 of the silo closed at the top.
  • the outer surface of the filter cartridge 16 is formed by a zigzag folded filter jacket 18.
  • the filter jacket can also consist of a filter hose or another filter medium commonly used in filter technology.
  • the cross-sectional shape of the filter cartridge can also be any.
  • an air reservoir 22 which in the example is circular and cylindrical, is present centrally symmetrically and projects completely upward through the filter cartridge 16 from the bottom surface 24 of the filter cartridge 16, which is closed at the bottom.
  • the air reservoir 22 also projects through the interior of a venturi nozzle 26, which is also seated centrally on the filter cartridge 16 from above in the longitudinal direction 22.
  • each partition wall 30, 32 which extend in the longitudinal direction through the filter cartridge 16 and the venturi nozzle 26 and with one end face on the inside 28 and rest with their opposite end face on the outside of the air reservoir 22.
  • the connection of these walls 30, 32 to the air reservoir 22 is airtight. Outside the air reservoir 22, two spaces 34, 36 are thus present in the area of the venturi nozzle 26 and the filter cartridge 16.
  • An air nozzle 38, 40 is provided above each intermediate space 34, 36.
  • Each of these nozzles is connected via a branch line 42, 44 to a two-way valve 1 46 and 48, respectively.
  • the two two-way valves 46, 48 are in turn connected to a feed device 50, which in turn is connected to an air reservoir or to a compressor in a permanent conductive connection.
  • a further air line 52 branches off from the supply line 50 and is connected to a valve block 58 on the one hand and to the air reservoir 22 arranged in the interior of the filter cartridge 16 via a switch 54 designed as a two-way valve and a downstream check valve 56 is.
  • valve block 58 From the valve block 58, pneumatic line connections 60 and 62 lead to the two-way valve 46 and 48, respectively. These in the two-way valves 46, 48 are controlled via this valve block 58. The control takes place pneumatically against the two springs in their OFF position holding return springs.
  • the filter components above the ceiling 14 and those for the pneumatic control device are covered by a hood (not shown).
  • Compressed air is continuously applied to the nozzles via line 50.
  • the valves 46, 48 are in their blocking position shown in the drawing, so that the air does not pass through the nozzles in the respective intermediate positions. rough area 34 or 36 can be blown into.
  • the air line 52 is also continuously filled with compressed air.
  • a membrane 70 present in the ceiling 14 bulges out so far upwards, that the switch 54 opens against the force of a return spring via a pushing lever 72 which also moves upwards.
  • the air from the line 52 can flow both into the valve block 58 and into the air accumulator 22.
  • the air then flows from the valve block 58 via the line connections 60, 62 to the valves 46, 48.
  • the logic circuit function provided in the valve block 58 is such that the two valves 46, 48 are opened one after the other in time. Before the next valve is opened, the previous valve is closed. As a result, air is only ever blown into a space 34 or 36. During this blowing process, the air reservoir 22 is under overpressure.
  • the cleaning process is repeated in successive cycles as long as the membrane remains in its high-arched position.
  • the air required for this is supplied to the line 50 from the compressor (not shown).
  • the feeler lever 72 also moves downward, so that the switch 54 is in its position Position shown Ein ⁇ takes. In this position, the air supply to the valve block 58 and the air reservoir 22 is interrupted. The air now escapes from the air reservoir 22. As a result of the check valve 56, this air can only escape into the valve block 58.
  • valve block 58 is pressurized with air again, so that the valves 46, 48 are shifted into their ON position at least once more can. As a result, at least one cleaning process takes place again. Subsequently, the excess pressure in the air reservoir 22 is reduced, so that the valve block 58 can no longer be acted upon by control air. In turn, the re n Trentsvorgan 'g total completed. At this point, the filter jacket 18 is completely cleaned in all of its areas. The next cleaning process does not start until a certain overpressure has been established again within the filter 12 and, as a result, the membrane 60 has bulged to a certain extent.
  • filter cartridge 16 Although only one filter cartridge 16 is shown in the filter 12, a plurality of such filter cartridges 16 or other filter cartridges which only have a uniform interior can of course be present.
  • both the air nozzles from a single filter cartridge 16 and, if there are several filter cartridges, can be controlled in accordance with a plurality of nozzles.
  • the air nozzles 38, 40 of a filter cartridge corresponding to the filter cartridge 16 can also be switched together. It then only has to be ensured that not all filter cartridges present in a filter are cleaned at the same time. This can easily be ensured by cleaning the individual cartridges at different times.
  • any number of partitions in a filter cartridge or other filter body such as a plate-shaped filter makes it possible to produce the required filter surface with only a single filter body.
  • the absence of a further filter body ensures that none of the filter surfaces opposite to the filter surfaces of this filter body of a neighboring filter body are present. This allows sic the deposits thrown off the same when cleaning the filter jacket do not attach to other filter jacket surfaces.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Water Treatment By Sorption (AREA)
  • Retarders (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

A filter cartridge (16) for cleaning the dedusting filter of a silo by means of an air nozzle (26) into which the air is blown intermittently, arranged above a filter cartridge (16) of the filter (12) provided with a filter jacket (18), is characterized in that at least one recess body (22) is present inside the filter cartridge (16). Said body is virtually free of contact with the filter jacket (18) of the filter cartridge and is closed on all sides or its opening is positioned in the filter cartridge with respect to the air nozzle (38, 40) so that no air can be blown into it through the air nozzle (38, 40).

Description

BESCHREIBUNG DESCRIPTION
FilterpatroneFilter cartridge
TECHNISCHES GEBIETTECHNICAL AREA
Die Erfindung betrifft eine Filterpatrone zum Reinigen des Entstaubungsf 1 ters eines Silos. Das Reinigen erfolgt mit¬ tels stoßweise in die Filterpatrone eingeblasener Luft, wo¬ bei die Luft über eine Luftdüse zugeführt wird, die oberhalb der Filterpatrone vorhanden ist.The invention relates to a filter cartridge for cleaning the dust removal filter of a silo. The cleaning is carried out by means of intermittent air blown into the filter cartridge, the air being supplied via an air nozzle which is present above the filter cartridge.
Ein derartiger Ents taubungsfi 1 ter wird für die Filtrierung der Abluft beim pneumatischen Befüllen eines Silos mit einem pul verförmigen Schüttgut wie z. B. Zement eingesetzt. Wäh¬ rend des Fül 1 Vorganges strömt die beim Befüllen als Träger- edium eingesetzte Luft zusammen mit dem Füllmaterial von außen gegen die einen Filtermantel darstellende Filterfläche des Filters. Da lediglich die Luft durch den Filter hindurch ins Freie entweichen kann, lagert sich auf der Außenseite der Filterfläche das Füllgut ab. Damit der Filter nicht un- wirksam wird, muß er von Zeit zu Zeit gereinigt werden.Such a taubungsfi 1 ter is used for filtering the exhaust air when pneumatically filling a silo with a pulverized bulk material such as. B. cement used. During the filling process, the air used as the carrier medium during filling flows together with the filling material from the outside against the filter surface of the filter, which represents a filter jacket. Since only the air can escape through the filter to the outside, the contents are deposited on the outside of the filter surface. To prevent the filter from becoming ineffective, it must be cleaned from time to time.
STAND DER TECHNIKSTATE OF THE ART
Es ist bekannt, den Filter dadurch zu reinigen, daß von oben in seinen Innenraum Druckluft stoßweise eingeblasen wird. Während dieses Reinigungsvorganges ist der Filter in seiner Filterfunktion unwirksam, da während dieses Zeitraumes keine Luft von außen nach innen durch seinen Filtermantel hindurch¬ strömen kann.It is known to clean the filter in that compressed air is blown intermittently into its interior from above. During this cleaning process, the filter function is ineffective, since no air can flow through its filter jacket from outside to inside during this period.
Damit sich während des Reinigungsvorganges, bei dem sich durch die eingeblasene Druckluft in dem Inneren des Filters der Druck erhöht, nicht das Überdruc ventil am Silo öffnet mit der Folge, daß durch diese Zwangsentlüftung Füllgut aus dem Silo herausgeblasen wird, was sowohl aus wirtschaf l ¬ chen Gründen als auch insbesondere wegen der dadurch bewirk¬ ten Umweltverschmutzung in höchstem Maße unerwünscht ist, ist es aus der WO 87/02268 bekannt, mehrere Filterpatronen innerhalb eines Filters anzuordnen, die so zeitlich nachein¬ ander gereinigt werden, daß niemals alle Filterpatronen gleichzeitig gereinigt werden und damit für den Filtervor¬ gang nicht zur Verfügung stehen. Die den einzelnen Filter- patronen zugeordneten Luftdüsen sind steuerungsmäßig so mit einem zusätzlich vorhandenen Luftspeicher verbunden, daß nach einem durch Vorhandensein eines bestimmten Überdrucks im Filter ausgelösten Reinigungszykl usses noch einmal zumin¬ dest ein Reinigungszyklus ablaufen kann. Dadurch wird er- reicht, daß nach Beendigung eines Fül 1 Vorganges die Filter¬ schläuche gereinigt vorhanden sind.So that the overpressure valve on the silo does not open during the cleaning process, in which the pressure increases due to the blown compressed air inside the filter with the result that filling material is blown out of the silo by this forced ventilation, which is highly undesirable both for economic reasons and particularly because of the environmental pollution caused thereby, it is known from WO 87/02268, several Arrange filter cartridges within a filter which are cleaned one after the other in such a way that all filter cartridges are never cleaned at the same time and are therefore not available for the filtering process. In terms of control, the air nozzles assigned to the individual filter cartridges are connected to an additional air reservoir so that after a cleaning cycle triggered by the presence of a certain excess pressure in the filter, at least one cleaning cycle can run again. It is thereby achieved that the filter hoses are present in a cleaned state after a filling process has ended.
Je kleiner die Filterpatrone ist, umso leichter d. h. mit umso weniger Luftmenge läßt sich ein Unterdruck in der Fil- terpatrone zum Zwecke des Reinigens aufbauen. Daher sind aus Reinigungsgründen möglichst im Durchmesser kleine Filterpa¬ tronen wünschenswert. Die Filterwirkung hängt dagegen von der Größe des Filtermantels ab. Mit je weniger Filterpatro¬ nen aber eine bestimmte Gesamt-Fi 1 termanteloberflache zur Verfügung gestellt wird, desto preiswerter sind die Gesamt¬ kosten für den Filter. Weniger Filterpatronen bedingen bei vergleichbarer Filteroberfläche allerdings im Durchmesser größere Filterpatronen. Für den Filtervorgang ist die Größe des Durchmessers einer Filterpatrone praktisch ohne Belang; zum Reinigen wirkt sich das Vergrößern einer Filterpatrone im Durchmesser dagegen ungünstig aus, da die oberhalb der Filterpatrone angeordnete Düse bezüglich ihres Luftdurchsat¬ zes entsprechend groß ausgelegt werden muß.The smaller the filter cartridge, the easier d. H. With the less air volume, a vacuum can be built up in the filter cartridge for the purpose of cleaning. For cleaning reasons, filter cartridges with a diameter as small as possible are therefore desirable. The filter effect, however, depends on the size of the filter jacket. However, the fewer filter cartridges a certain total surface area is made available, the cheaper the total costs for the filter are. Fewer filter cartridges require larger filter cartridges with a comparable filter surface. The size of the diameter of a filter cartridge is practically irrelevant for the filtering process; for cleaning, however, enlarging the diameter of a filter cartridge has an unfavorable effect, since the nozzle arranged above the filter cartridge must be designed to be appropriately large in terms of its air throughput.
DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION
Ausgehend von diesem vorbekannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, Filterpatronen für einen Filter anzugeben, die sowohl optimal hinsichtlich ihrer Fil¬ terwirkung als auch hinsichtlich ihres Reinigungsaufwandes sind.Based on this known prior art, the invention has for its object filter cartridges for Specify filters that are both optimal in terms of their filtering effect and in terms of their cleaning effort.
Diese Erfindung ist durch die Merkmale des Hauptanspruchs ge¬ geben. Sie ist bei einer Filterpatrone zum Reinigen des Ent- staubungsfi 1 ters eines Silos der eingangs genannten Art dem¬ entsprechend dadurch gekennzeichnet, daß zumindest ein Aus¬ sparungskörper im Inneren einer Filterpatrone vorhanden ist, der praktisch keinen Kontakt mit dem Filtermantel der Filter¬ patrone besitzt und der allseitig verschlossen oder mit sei¬ ner Öffnung bezüglich der Luftdüse so in der Filterpatrone positioniert ist, daß durch die Luftdüse keine Luft in ihn hineingeblasen werden kann. Bei einer darartigen Filterpatro- ne verkleinert der Aussparungskörper den Innenraum der Fil¬ terpatrone, so daß sich der zum Reinigen erforderliche Über¬ druck im Inneren der F lterpatrone mit einer entsprechend verringerten Luftmenge und damit schneller aufbauen läßt. Dies führt dazu, daß die oberhalb der Filterpatrone vorhande- ne zumindest eine Luftdüse für einen kleineren Luftdurchsatz ausgelegt werden kann. Da der Aussparungskörper praktisch keinen Kontakt mit dem Filtermantel der F lterpatrone be¬ sitzt, wird die Filterwi kung nicht beeinträchtigt. Dadurch ist es möglich, im Durchmesser relativ große F lterpatronen einzusetzen, was zu einer verringerten Gesamtanzahl von Fil¬ terpatronen in einem Filer führt. Dies hat bedeutende wirt¬ schaftliche Vorteile.This invention is given by the features of the main claim. In the case of a filter cartridge for cleaning the dedusting filter of a silo of the type mentioned at the outset, it is accordingly characterized in that there is at least one recess body in the interior of a filter cartridge which has practically no contact with the filter jacket of the filter cartridge and which is closed on all sides or is positioned with its opening with respect to the air nozzle in the filter cartridge in such a way that no air can be blown into it through the air nozzle. In a filter cartridge of this type, the recess body reduces the interior of the filter cartridge, so that the excess pressure required for cleaning inside the filter cartridge can be built up with a correspondingly reduced amount of air and thus more quickly. This leads to the fact that the at least one air nozzle present above the filter cartridge can be designed for a smaller air throughput. Since the recess body has practically no contact with the filter jacket of the filter cartridge, the filter movement is not impaired. This makes it possible to use filter cartridges of relatively large diameter, which leads to a reduced total number of filter cartridges in a filer. This has significant economic advantages.
Um zu erreichen, daß vergleichsweise noch kleiner ausgelegte Luftdüsen verwendet werden können, sind in vorteilhafter Wei¬ se in der Filterpatrone Zwischenwände vorhanden, die die Innenseite des Filtermantels mit der Außenseite des Ausspa¬ rungskörpers so luftdicht verbinden, daß der Innenraum der F 1 terpatrone in mehrere, oben offene, seitlich durch Berei- ehe des Filtermantels und Bereiche des Aussparungskörpers um¬ grenzte Innenraumberei ehe unterteilt wird, wobei dann ober¬ halb jedes dieser Innenraumberei ehe eine Luftdüse angeordnet werden kann. Durch die Zwischenräume wird innerhalb einer Fil terpatrone der wirksam vorhandene Innenraum unterteilt, so daß nicht ein einziger verkleinerter Innenraum sondern mehrere, nochmals verkleinerte Innenraumbereiche bezüglich einer einzelnen Luftdüse vorhanden sind. Zur Reduzierung des Luftbedarfs ist in vorteilhafter Weise zwischen einer Luft¬ düse und der Filterpatrone eine Venturidüse angeordnet.In order to ensure that even smaller air nozzles can be used, there are advantageously intermediate walls in the filter cartridge which connect the inside of the filter jacket to the outside of the recess body in such an air-tight manner that the interior of the filter cartridge in a plurality of interior areas, open at the top and laterally delimited by areas of the filter jacket and areas of the recess body, is subdivided, an air nozzle then being able to be arranged above each of these interior areas. Through the gaps within one Fil terpatrone the effectively existing interior divided, so that not a single reduced interior but several, even smaller interior areas are available with respect to a single air nozzle. To reduce the air requirement, a Venturi nozzle is advantageously arranged between an air nozzle and the filter cartridge.
Eine besonders vorteilhafte Weiterbildung der Erfindung zeichnet sich dadurch aus,, daß der Aussparungskörper, der sich in Längsrichtung der F lterpatrone durch den gesamten Innenraum der Filterpatrone und durch den Innenraum der Ven- turi-Düse erstreckt, zentrisch innerhalb der Filterpatrone angeordnet wird, und daß zumindest zwei getrennt voneinander angeordnete Zwischenwände angeordnet werden, die ebenflächig ausgebildet sind und die jeweils mit ihrer einen Stirnseite auf der Innenseite des F 1 termantel s bzw. de r Innenseite der Venturi-Düse und mit ihrer gegenüberliegenden Stirnseite auf der Außenseite des Aussparuπgskörper anstosseπ, wobei jede Wand an dem Aussparungskörper luftdicht anliegt. Nicht nur die Filterpatrone sondern auch die oberhalb derselben ange¬ ordnete Venturi-Düse wird damit durch den Aussparungskörper und die Zwischenwände in mehrere Innenraumbereiche auf kon¬ struktiv einfache Weise unterteilt.A particularly advantageous development of the invention is characterized in that the recess body, which extends in the longitudinal direction of the filter cartridge through the entire interior of the filter cartridge and through the interior of the venturi nozzle, is arranged centrally within the filter cartridge, and that at least two partition walls are arranged separately from each other, which are flat and each with their one end face on the inside of the F 1 termantel s or the inside of the venturi nozzle and with their opposite end face on the outside of the recess body, butting, whereby every wall is airtight on the recess body. Not only the filter cartridge but also the venturi nozzle arranged above the same is thus divided by the recess body and the partition walls into several interior areas in a structurally simple manner.
Der Aussparungskörper läßt sich in vorte lhafter Weise nicht nur zum Verkleinern des Innenraumvolu ens benutzen, sondern auch als der im erwähnten Stand der Technik zum Ansteuern der Luftdüsen erforderliche Luftspeicher. Durch Integration des Luftspeichers mit der Patrone, läßt sich der die Filter- patrone enthaltende Filter damit wünschenswert kompakt aus¬ bilden.The recess body can be used not only to reduce the interior volume, but also as the air reservoir required in the prior art mentioned for controlling the air nozzles. By integrating the air reservoir with the cartridge, the filter containing the filter cartridge can thus be made compact in a desirable manner.
Weitere Ausgestaltungen und Vorteile der Erfindung sind den in den Ansprüchen weiterhin aufgeführten Merkmalen zu ent- nehmen. KURZE BESCHREIBUNG DER ZEICHNUNGFurther refinements and advantages of the invention can be found in the features further specified in the claims. BRIEF DESCRIPTION OF THE DRAWING
Die Erfindung wird im folgenden anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher beschrieben und er- läutert. Die einzige Figur zeigt eine perspektivische Sche a' tische Darstellung einer Filterpatrone, die auf dem schema¬ tisch dargestellten Dach eines Silos angeordnet ist.The invention is described and explained in more detail below with reference to the embodiment shown in the drawing. The single figure shows a perspective schematic representation of a filter cartridge which is arranged on the schematically represented roof of a silo.
WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS OF CARRYING OUT THE INVENTION
Auf einem Silodach 10 ist das hohl zyl i nderförmige Gehäuse eines Filters 12 montiert. Das Innere des Filters 12 bildet mit dem Inneren des Silos eine Einheit.The hollow cylindrical housing of a filter 12 is mounted on a silo roof 10. The interior of the filter 12 forms a unit with the interior of the silo.
Von der oben verschlossenen Decke 14 des Silos ragt eine oben offene Filterpatrone 16 nach unten in den Filter 12 hin¬ ein. Die Außenfläche der Filterpatrone 16 wird von einem zickzackförmig gefalteten Filtermantel 18 gebildet. Der Fil¬ termantel kann auch aus einem Filterschlauch oder einem sonstigen in der Filtertechnik gebräuchlichen Filtermedium bestehen. Auch die Querschnittsform der Filterpatrone kann beliebig sein.A filter cartridge 16, which is open at the top, projects downward into the filter 12 from the ceiling 14 of the silo closed at the top. The outer surface of the filter cartridge 16 is formed by a zigzag folded filter jacket 18. The filter jacket can also consist of a filter hose or another filter medium commonly used in filter technology. The cross-sectional shape of the filter cartridge can also be any.
Im Inneren der sich in Längsrichtung 20 erstreckenden Filter- patrone 16 ist zentral symmetri seh ein im Beispielfall kreis- zylinderförmiger Luftspeicher 22 vorhanden, der von der unten verschlossenen Bodenfläche 24 de r Filterpatrone 16 nach oben durch die Filterpatrone 16 vollständig hindurch¬ ragt. Der Luftspeicher 22 ragt ferner noch durch das Innere einer Venturi-Düse 26 hindurch, die ebenfalls zentrisch zur Längsrichtung 22 von oben auf der Filterpatrone 16 aufsitzt.In the interior of the filter cartridge 16, which extends in the longitudinal direction 20, an air reservoir 22, which in the example is circular and cylindrical, is present centrally symmetrically and projects completely upward through the filter cartridge 16 from the bottom surface 24 of the filter cartridge 16, which is closed at the bottom. The air reservoir 22 also projects through the interior of a venturi nozzle 26, which is also seated centrally on the filter cartridge 16 from above in the longitudinal direction 22.
Zwischen dem Luftspeicher 22 und der Innenseite 28 des Fil- teπnantels 18 sind zwei Trennwände 30, 32 vorhanden, die sich in Längsrichtung durch die Filterpatrone 16 und die Ven¬ turi-Düse 26 hindurch erstrecken und mit i rer einen Stirn¬ seite auf der Innenseite 28 und mit ihrer gegenüberliegenden Stirnseite auf der Außenseite des Luftspeichers 22 anliegen. Die Verbindung dieser Wände 30, 32 mit dem Luftspeicher 22 ist luftdicht. Außerhalb des Luftspeichers 22 sind damit im Bereich der Venturi-Düse 26 und der Filterpatrone 16 zwei Zwischenräume 34, 36 vorhanden. Oberhalb eines jeden Zwi- schenraumes 34, 36 ist eine Luftdüse 38, 40 vorhanden. Jede dieser Düsen ist über.eine Stichleitung 42, 44 mit einem ZweiWege-Venti 1 46 bzw. 48 verbunden. Die beiden Zwei-Wege- Ventile 46, 48 sind ihrerseits mit einer Zuführle tung 50 verbunden, die ihrerseits an einem Luft-Vorratsbehälter oder mit einem Kompressor in dauernder leitender Verbindung steht.Between the air reservoir 22 and the inside 28 of the filter shell 18 there are two partition walls 30, 32 which extend in the longitudinal direction through the filter cartridge 16 and the venturi nozzle 26 and with one end face on the inside 28 and rest with their opposite end face on the outside of the air reservoir 22. The connection of these walls 30, 32 to the air reservoir 22 is airtight. Outside the air reservoir 22, two spaces 34, 36 are thus present in the area of the venturi nozzle 26 and the filter cartridge 16. An air nozzle 38, 40 is provided above each intermediate space 34, 36. Each of these nozzles is connected via a branch line 42, 44 to a two-way valve 1 46 and 48, respectively. The two two-way valves 46, 48 are in turn connected to a feed device 50, which in turn is connected to an air reservoir or to a compressor in a permanent conductive connection.
Von der Zuführleitung 50 zweigt eine weitere Luftleitung 52 ab, die über einen als Zwei-Wege-Ventil ausgebildeten Schal- ter 54 und ein nachgeschaltetes Rückschlagventil 56 einer¬ seits mit einem Ventilblock 58 und andererseits mit dem im Inneren der Filterpatrone 16 angeordneten Luftspeicher 22 verbunden ist.A further air line 52 branches off from the supply line 50 and is connected to a valve block 58 on the one hand and to the air reservoir 22 arranged in the interior of the filter cartridge 16 via a switch 54 designed as a two-way valve and a downstream check valve 56 is.
Von dem Ventilblock 58 führen pneumatische Lei tungsverbindun gen 60 bzw. 62 zu dem Zwei-Wege-Ventil 46 bzw. 48. Diese bei den Zwei-Wege-Ventile 46, 48 werden über diesen Ventilblock 58 gesteuert. Die Steuerung geschieht pneumatisch gegen die beiden Ventilen in ihrer AUS-Stellung haltende Rückstell- federn.From the valve block 58, pneumatic line connections 60 and 62 lead to the two-way valve 46 and 48, respectively. These in the two-way valves 46, 48 are controlled via this valve block 58. The control takes place pneumatically against the two springs in their OFF position holding return springs.
Die oberhalb der Decke 14 vorhandenen Bauteile des Filters bzw. die für die pneumatische Steuerungsvorrichtuπg werden von einer nicht dargestellten Haube bedeckt.The filter components above the ceiling 14 and those for the pneumatic control device are covered by a hood (not shown).
Die Zufuhr von Luft vom Kompressor durch die Luftdüsen 38, 40 in die Filterpatrone 16 hinein funktioniert auf folgende Wei se :The supply of air from the compressor through the air nozzles 38, 40 into the filter cartridge 16 works in the following way:
An den Düsen liegt fortwährend über die Leitung 50 Druckluft an. In Ruhestellung befinden sich die Ventile 46, 48 in ihrer in der Zeichnung dargestellten Sperrstellung, so daß die Luft nicht durch die Düsen in den jeweiligen Zwischen- rau bereich 34 bzw. 36 hineingeblasen werden kann.Compressed air is continuously applied to the nozzles via line 50. In the rest position, the valves 46, 48 are in their blocking position shown in the drawing, so that the air does not pass through the nozzles in the respective intermediate positions. rough area 34 or 36 can be blown into.
Auch die Luftleitung 52 ist fortwährend mit Druckluft ge¬ füllt. Sobald nun im Silo und damit im Inneren des Filters 12 sich ein bestimmter Überdruck aufgebaut hat, weil sich an der Außenseite des Filtermantels 18 eine bestimmte Menge an Füllstoffen abgelagert hat, wölbt sich eine in der Decke 14 vorhandene Membran 70 so weit nach oben aus, daß sich über einen sich ebenfalls nach .oben verschiebenden Tasthebel 72 der Schalter 54 gegen die Kraft einer Rückstellfeder hin öff¬ net. Dadurch kann die Luft aus der Leitung 52 sowohl in den Ventilblock 58 als auch in den Luftspeicher 22 strömen. Von dem Ventilblock 58 strömt dann die Luft über die Leitungsver¬ bindungen 60, 62 zu den Ventilen 46, 48. Die in dem Ventil- block 58 vorgesehene logische Schaltungsfunktion ist derart, daß die beiden Ventile 46, 48 zeitlich nacheinander geöffnet werden. Bevor dabei das jeweils nächste Ventil geöffnet wird, wird das vorherige Ventil geschlossen. Dadurch wird immer nur in einen Zwischenraumbereich 34 bzw. 36 Luft hin- eingeblasen. Während dieses Blasvorganges steht der Luftspei¬ cher 22 unter Überdruck.The air line 52 is also continuously filled with compressed air. As soon as a certain overpressure has built up in the silo and thus inside the filter 12 because a certain amount of fillers has deposited on the outside of the filter jacket 18, a membrane 70 present in the ceiling 14 bulges out so far upwards, that the switch 54 opens against the force of a return spring via a pushing lever 72 which also moves upwards. As a result, the air from the line 52 can flow both into the valve block 58 and into the air accumulator 22. The air then flows from the valve block 58 via the line connections 60, 62 to the valves 46, 48. The logic circuit function provided in the valve block 58 is such that the two valves 46, 48 are opened one after the other in time. Before the next valve is opened, the previous valve is closed. As a result, air is only ever blown into a space 34 or 36. During this blowing process, the air reservoir 22 is under overpressure.
Der Reinigungsvorgang wird in aufeinanderfolgenden Zyklen so¬ lange wiederholt, wie die Membran in ihrer hochgewölbten Stellung verharrt. Die dazu benötigte Luft wird aus dem nicht dargestellten Kompressor der Leitung 50 zugeführt. So¬ bald der Überdruck im Filter und damit auch der im Silo unter einen gewünschten Wert gefallen ist und die Membran 70 aus ihrer maximalen Wölbstellung wieder abgesunken ist, ver- schiebt sich der Tasthebel 72 ebenfalls nach unten, so daß der Schalter 54 seine in der Zeichnung dargestellte Lage ein¬ nimmt. In dieser Stellung wird die Luftzufuhr zu dem Ventil¬ block 58 und dem Luftspeicher 22 unterbrochen. Nunmehr ent¬ weicht die Luft aus dem Luftspeicher 22 heraus. Infolge des Rückschlagventils 56 kann diese Luft nur in den Ventilblock 58 hineinentweichen. Dadurch wird der Ventilblock 58 noch einmal mit Luft beaufschlagt, so daß zumindest noch einmal die Ventile 46, 48 in ihre EIN-Stellung verschoben werden können. Es findet dadurch noch einmal zumindest ein Reini¬ gungsvorgang statt. Anschließend daran ist der Überdruck im Luftspeicher 22 abgebaut, so daß der Ventilblock 58 nicht mehr mit einer Steuerluft beaufschlagt werden kann. Dadurch wiederum ist der Re nigungsvorgan'g insgesamt abgeschlossen. Zu diesem Zeitpunkt ist der Filtermantel 18 in allen seinen Bereichen vollständig gereinigt. Der nächste Reinigungsvor¬ gang setzt erst ein, wenn sich wieder innerhalb des Filters 12 ein bestimmter Überdruck eingestellt und sich infolgedes sen die Membran 60 um ein bestimmtes Maß ausgewölbt hat.The cleaning process is repeated in successive cycles as long as the membrane remains in its high-arched position. The air required for this is supplied to the line 50 from the compressor (not shown). As soon as the overpressure in the filter and thus also in the silo has dropped below a desired value and the membrane 70 has dropped out of its maximum arching position, the feeler lever 72 also moves downward, so that the switch 54 is in its position Position shown Ein¬ takes. In this position, the air supply to the valve block 58 and the air reservoir 22 is interrupted. The air now escapes from the air reservoir 22. As a result of the check valve 56, this air can only escape into the valve block 58. As a result, the valve block 58 is pressurized with air again, so that the valves 46, 48 are shifted into their ON position at least once more can. As a result, at least one cleaning process takes place again. Subsequently, the excess pressure in the air reservoir 22 is reduced, so that the valve block 58 can no longer be acted upon by control air. In turn, the re nigungsvorgan 'g total completed. At this point, the filter jacket 18 is completely cleaned in all of its areas. The next cleaning process does not start until a certain overpressure has been established again within the filter 12 and, as a result, the membrane 60 has bulged to a certain extent.
Obwohl nur eine Filterpatrone 16 im Filter 12 dargestellt ist, können selbstverständlich mehrere derartige Filterpatr nen 16 oder auch andere Filterpatronen, die nur einen ein- heitlichen Innenraum besitzen, vorhanden sein.Although only one filter cartridge 16 is shown in the filter 12, a plurality of such filter cartridges 16 or other filter cartridges which only have a uniform interior can of course be present.
Aus dem Luftspeicher 22 können -sowohl die Luftdüsen von einer einzelnen Filterpatrone 16 als auch - beim Vorhanden¬ sein von mehreren Filterpatronen - die entsprechend dann mehreren Düsen gesteuert werden.From the air reservoir 22, both the air nozzles from a single filter cartridge 16 and, if there are several filter cartridges, can be controlled in accordance with a plurality of nozzles.
Bei Vorhandensein von mehreren F lterpatronen innerhalb eines Filters 12 können die Luftdüsen 38, 40 einer der Fil¬ terpatrone 16 entsprechenden F 1 terpatrone auch gemeinsam g schaltet werden. Es muß dann nur sichergestellt werden, daß nicht alle in einem Filter vorhandenen Filterpatronen gleic zeitig gereinigt werden. Dies kann durch einen entsprechend zeitlich versetzten Reinigungsvorgang für die einzelnen Patronen leicht sichergestellt werden.If there are several filter cartridges within a filter 12, the air nozzles 38, 40 of a filter cartridge corresponding to the filter cartridge 16 can also be switched together. It then only has to be ensured that not all filter cartridges present in a filter are cleaned at the same time. This can easily be ensured by cleaning the individual cartridges at different times.
Die Anordnung von beliebig vielen Zwischenwänden in einer Filterpatrone oder einem sonstigen Filterkörper wie bei¬ spielsweise einem pl attenförmigen Filter erlaubt es, die erforderliche Filteroberfl che nur mit einem einzigen Filte körper herzustellen. Durch das Fehlen eines weiteren Fil.ter körpers wird erreicht, daß keine der F 1 eroberf1 che diese Filterkörpers gegenüberliegenden F 1teroberf1ächen eines be nachbarten Filterkörpers vorhanden sind. Dadurch können sic die beim Abreinigen des Filtermantels von demselben wegge¬ schleuderten Ablagerungen nicht auf anderen Filtermantel- Oberflächen festsetzen. The arrangement of any number of partitions in a filter cartridge or other filter body such as a plate-shaped filter makes it possible to produce the required filter surface with only a single filter body. The absence of a further filter body ensures that none of the filter surfaces opposite to the filter surfaces of this filter body of a neighboring filter body are present. This allows sic the deposits thrown off the same when cleaning the filter jacket do not attach to other filter jacket surfaces.

Claims

ANSPRÜCHEEXPECTATIONS
01) Fi 1 terpatrone zum Reinigen des Entstaubungsfi 1 ters eines Silos mittels einer Luftdüse, in die stoßweise Luft eingebla sen wird, die oberhalb einer einen Filtermantel besitzenden Filterpatrone des Filters angeordnet ist, d a d u r c h g e k e n n z e i c h n e t ., daß zumindest ein Aussparungskörper (22) im Inneren der Filter- patrone (16) vorhanden ist, der praktisch keinen Kontakt mit dem Filtermantel (18) der Filterpatrone besitzt und der allseitig verschlossen oder mit seiner Öffnung bezüglich der Luftdüse (38, 40) so in der Filterpatrone positioniert ist, daß durch die Luftdüse (38, 40) keine Luft in ihn hi neigebl äsen werden kann.01) filter cartridge for cleaning the dust removal filter of a silo by means of an air nozzle into which air is blown intermittently, which is arranged above a filter cartridge of the filter having a filter jacket, characterized in that at least one recess body (22) inside the There is a filter cartridge (16) which has practically no contact with the filter jacket (18) of the filter cartridge and which is closed on all sides or positioned with its opening in relation to the air nozzle (38, 40) in the filter cartridge in such a way that the air nozzle ( 38, 40) no air can be blown into it.
02) Filterpatrone nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß Zwischenwände (30, 32) vorhanden sind, die die Innenseite- (28) des Filtermantels (18) mit der Außenseite des Ausspa¬ rungskörpers (22) so luftdicht verbinden, daß der Innenraum der Filterpatrone in mehrere, oben offene, seitlich durch Bereiche des Filtermantels (18) und Bereiche des Aussparungs körers (22) umgrenzte Innenraumbereiche (34, 36) unterteilt ist, und daß oberhalb jedes dieser Innenraumbereiche eine Luftdüse (38, 40) vorhanden ist.02) filter cartridge according to claim 1, characterized in that there are partition walls (30, 32) which connect the inside (28) of the filter jacket (18) with the outside of the recess body (22) so that they are airtight so that the interior of the filter cartridge is divided into several, open at the top, laterally through areas of the filter jacket (18) and areas of the recess body (22) bounded interior areas (34, 36), and that above each of these interior areas an air nozzle (38, 40) is present.
03) Filterpatrone nach Anspruch 1, d a d u r c h g e k e n n z e c h n e t , daß zwischen der zumindest einen Luftdüse (38, 40) und der Fil¬ terpatrone (16) eine Venturi-Düse (26) angeordnet ist.03) Filter cartridge according to claim 1, so that a venturi nozzle (26) is arranged between the at least one air nozzle (38, 40) and the filter cartridge (16).
04) Filterpatrone nach Anspruch 2 und 3, d a d u r c h g e k e n n z e i c h n e t , daß - ein Aussparungskörper (22) vorhanden ist, der zentrisch innerhalb der Filterpatrone (16) angeordnet ist und sich in04) filter cartridge according to claim 2 and 3, d a d u r c h g e k e n n z e i c h n e t that - there is a recess body (22) which is arranged centrally within the filter cartridge (16) and in
Längsrichtung (20) der F lterpatrone (16) durch den gesamtenLongitudinal direction (20) of the filter cartridge (16) through the entire
Innenraum derselben und durch den Innenraum der Venturi-Düse (26) erstreckt, undInterior of the same and through the interior of the Venturi nozzle (26) extends, and
- zumindest zwei getrennt voneinander angeordnete Zwischen¬ wände (30, 32) vorhanden sind, die ebenflächig ausgebildet sind und die mit ihrer einen Stirnseite auf der Innenseite (28) des Filtermantels (18) bzw. der Innenseite der Venturi- Düse (26) und mit ihrer gegenüberliegenden Stirnseite auf der Außenseite des Aussparungskörpers (22) anstoßen, wobei jede Wand (30, 32) an dem Aussparungskörper (22) luftdicht anl iegt.- There are at least two partition walls (30, 32) arranged separately from one another, which are flat and which have one end face on the inside (28) of the filter jacket (18) or the inside of the Venturi nozzle (26) and abut with its opposite end face on the outside of the recess body (22), each wall (30, 32) lying airtight on the recess body (22).
05) F 1 terpatrone nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , daß der Aussparungskörper als Druckluftspeicher (22) ausgebildet ist, der über, eine Luftleitung (52) an einer Druck1 uftver- sorgungs-Ei nrichtung anschließbar ist. 05) F 1 ter cartridge according to one of claims 1 to 4, so that the recess body is designed as a compressed air reservoir (22) which can be connected to a compressed air supply device via an air line (52).
EP89908972A 1988-08-13 1989-08-09 Filter cartridge Pending EP0429492A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8810295U 1988-08-13
DE8810295U DE8810295U1 (en) 1988-08-13 1988-08-13 Filter cartridge

Publications (1)

Publication Number Publication Date
EP0429492A1 true EP0429492A1 (en) 1991-06-05

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ID=6826889

Family Applications (2)

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EP89114723A Expired - Lifetime EP0355010B1 (en) 1988-08-13 1989-08-09 Filter cartridge
EP89908972A Pending EP0429492A1 (en) 1988-08-13 1989-08-09 Filter cartridge

Family Applications Before (1)

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Country Status (7)

Country Link
US (1) US5338325A (en)
EP (2) EP0355010B1 (en)
AT (1) ATE88656T1 (en)
AU (1) AU4041789A (en)
DE (2) DE8810295U1 (en)
ES (1) ES2040947T3 (en)
WO (1) WO1990001364A1 (en)

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Also Published As

Publication number Publication date
WO1990001364A1 (en) 1990-02-22
EP0355010B1 (en) 1993-04-28
AU4041789A (en) 1990-03-05
EP0355010A1 (en) 1990-02-21
ATE88656T1 (en) 1993-05-15
DE58904184D1 (en) 1993-06-03
DE8810295U1 (en) 1988-10-13
ES2040947T3 (en) 1993-11-01
US5338325A (en) 1994-08-16

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