DE1072458B - Tubular filter element for dust separators - Google Patents
Tubular filter element for dust separatorsInfo
- Publication number
- DE1072458B DE1072458B DENDAT1072458D DE1072458DA DE1072458B DE 1072458 B DE1072458 B DE 1072458B DE NDAT1072458 D DENDAT1072458 D DE NDAT1072458D DE 1072458D A DE1072458D A DE 1072458DA DE 1072458 B DE1072458 B DE 1072458B
- Authority
- DE
- Germany
- Prior art keywords
- filter
- filter element
- cloth
- fiber
- layers
- 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
Links
- 239000000428 dust Substances 0.000 title claims description 4
- 239000004744 fabric Substances 0.000 claims description 26
- 239000000835 fiber Substances 0.000 claims description 14
- 239000002657 fibrous material Substances 0.000 claims description 8
- 239000012065 filter cake Substances 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 7
- 229910052751 metal Inorganic materials 0.000 claims 5
- 239000002184 metal Substances 0.000 claims 5
- 238000006243 chemical reaction Methods 0.000 claims 2
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 239000012808 vapor phase Substances 0.000 claims 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- B01D46/2407—Filter candles
-
- 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
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
- B01D2267/40—Different types of filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
- B01D2275/10—Multiple layers
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filtering Materials (AREA)
Description
DEUTSCHESGERMAN
Gewisse chemische Verfahren, bei denen Katalysatorteilchen im Schwebzustand aus einem Gas ausgeschieden werden müssen, erfordern außerordentlich feine Filter. Es hat sich gezeigt, daß Filterschichten aus Glasfasern für diesen Zweck besonders gut geeignet sind. Bei derart feinen Filtern besteht aber die Schwierigkeit, den nach einiger Betriebszeit auf der Filterschicht sich bildenden Kuchen aus ausgenlterten Teilchen abzulösen. Geschieht eine derartige Reinigung des Filters nicht in verhältnismäßig kurzen Zeitabständen, so nimmt der Strömungswiderstand des Filters schnell zu, und die filternde Wirkung sinkt. Schon bei Filtern aus einer starren keramischen Masse ist die Ablösung des Kuchens kaum in befriedigender Weise möglich, und die Filterschicht muß daher häufig vollkommen erneuert werden. Bei Filtern aus Glasfaser ist aber das Ablösen mit mechanischen Geräten nahezu unmöglich, weil man den Kuchen von der Schicht mit Werkzeugen nicht lösen kann, ohne die darunterliegenden Glasfasern ernstlich zu beschädigen. Man ist deshalb dazu übergegangen, solche Filterstoffschichten durch Gegenstromspülung mit staubfreiem Gas zu reinigen.Certain chemical processes in which catalyst particles are excreted from a gas in a suspended state require extremely fine filters. It has been shown that filter layers made of glass fibers particularly well suited for this purpose are. With such fine filters, however, there is the difficulty that after some operating time on the Filter layer to peel off the cake formed from aged particles. Such purification occurs of the filter does not take place at relatively short time intervals, the flow resistance of the Filters close quickly and the filtering effect decreases. Even with filters made of a rigid ceramic mass the separation of the cake is hardly possible in a satisfactory manner, and the filter layer must therefore be frequent to be completely renewed. In the case of filters made of fiberglass, however, they are removed using mechanical devices almost impossible, because you can't remove the cake from the layer with tools without them seriously damage the underlying fiber optics. One has therefore switched to such filter fabric layers to be cleaned by countercurrent purging with dust-free gas.
Die Erfindung bezieht sich auf ein Filterelement zum Ausscheiden kleiner Schwebteilchen aus einem
Gasstrom, das aus einem zylindermaiitelförmigen perforierten
Tragrohr mit außen aufgelegter Filterstoffmatte aus einer oder mehreren Watte-, Filz- oder
Stapelfasertuchschichten aus Kieselerdefascr, Schlakkenwolle
oder Aluminiumsilikatglasfaser besteht, die vom Gasstrom beim Filtern von außen nach innen
durchströmt und in der bekannten Weise periodisch durch Gegenstromspülung abgereinigt wird. Gemäß
der Erfindung ist um die Filterstoffmatte ein Gewebeband
aus einem ebensolchen Fasermaterial wendelartig herumgewunden. Dieses Band verhindert eine übermäßige
Verformung bei der Umkehrung des Gasstromes. Gleichwohl bleibt das Gebilde in sich genügend
nachgiebig, um gerade so viel Verformung zu erlauben, wie zum Brechen des Filterkuchens nötig
ist. Zudem hat das aus demselben Fasei-material bestehende
Band die gleichen Eigenschaften wie die von ihm umhüllte eigentliche Filterschicht und ist infolgedessen
am Filtriervorgang selbst mitbeteiligt. Die nutzbare Filterfläche des Röhrenelements wird daher
durch das Gewebeband nicht beeinträchtigt. Ohne das Band wäre wegen der großen Nachgiebigkeit
der Faserstoffmatte die Gegenstromspülung schädlich, weil die Filterschicht sich zu stark verformen
würde, wenn der Druck des Gegenstromes so groß gemacht wir4, wie es das Fortblasen der gebrochenen
Teile des Filterkuchens erfordert. Die Verformung der Filterschicht wäre dann so erheblich, daß das
Filterelement durch Bruch eines großen Teiles der Röhrenförmiges Filterelement
für StaubabscheiderThe invention relates to a filter element for separating small suspended particles from a gas flow, which consists of a cylinder-shaped, perforated support tube with an externally applied filter material mat made of one or more cotton, felt or staple fiber cloth layers made of silica fiber, slag wool or aluminum silicate glass fiber, which is drawn from the gas flow when filtering flows through it from the outside to the inside and is cleaned periodically in the known manner by countercurrent flushing. According to the invention, a fabric tape made of such a fiber material is wound around the filter cloth mat in a helical manner. This band prevents excessive deformation when reversing the gas flow. Nevertheless, the structure remains sufficiently flexible to allow just as much deformation as is necessary to break the filter cake. In addition, the band, which is made of the same fiber material, has the same properties as the actual filter layer it encases and is consequently involved in the filtering process itself. The usable filter surface of the tubular element is therefore not impaired by the fabric tape. Without the belt, countercurrent flushing would be harmful because of the great flexibility of the fiber mat, because the filter layer would be deformed too much if the pressure of the countercurrent was made as great as required to blow away the broken parts of the filter cake. The deformation of the filter layer would then be so significant that the filter element could break through a large part of the tubular filter element
for dust separators
Anmelder:Applicant:
United CokeUnited Coke
and Chemicals Company Limited,and Chemicals Company Limited,
Treeton, Rotherham, YorkshireTreeton, Rotherham, Yorkshire
(Großbritannien)(Great Britain)
Vertreter: Dr.-Ing. G. Eichenberg, Patentanwalt,
Düsseldorf, Cecilienallee 76Representative: Dr.-Ing. G. Eichenberg, patent attorney,
Düsseldorf, Cecilienallee 76
Beanspruchte Priorität:
Großbritannien vom 17. Dezember 1951Claimed priority:
Great Britain 17 December 1951
Harry Lister Riley und John Norris,Harry Lister Riley and John Norris,
Treeton, Rotherham, Yorkshire (Großbritannien),Treeton, Rotherham, Yorkshire (UK),
sind als Erfinder genannt wordenhave been named as inventors
Fasern für die weitere Verwendung unbrauchbar würde.Fibers would become unusable for further use.
Ist die kurzfaserige Filterstoffmatte des Filterelements mehrschichtig ausgebildet, so werden, wie dies an sich bekannt ist, zwischen die Filterschichten zweckmäßigerweise Tuchbahnen aus Langfasermaterial gleichen Stoffes eingelegt. Zusätzlich kann dann um eine oder mehrere Zwischenschichten ein weiteres Gewebeband gewunden sein. Außerdem ist es vorteilhaft, die Ränder der Filterstoffmatte mittels Bindegarn oder Schnüren aus Fasermaterial auf den Stutzen des Tragrohres zu befestigen.If the short-fiber filter material mat of the filter element is made of multiple layers, how this is known per se, expediently cloth webs made of long fiber material between the filter layers inserted in the same fabric. In addition, a further one or more intermediate layers can then be added Fabric tape to be wound. It is also advantageous to tie the edges of the filter cloth mat by means of twine or to attach cords made of fiber material to the connecting piece of the support tube.
Bekanntermaßen kann man das Abfasem einer aus einer Anschwemmung von Faserstoffen bestehenden Filterschicht dadurch verhindern, daß man auf die Oberfläche der Filterschicht ein Gewebe z. B. aus Mull auflegt. Dieses Gewebe dient hierbei jedoch nicht dem Zweck, eine unzulässig starke Verformung der eigentlichen Filterschicht zu verhindern, wenn zum Ablösen des Filterkuchens im Gegenstrom gespült wird. Es ist ferner bekannt, ein rohrförmiges Filterelement aus einem wendelförmig gewundenen Gewebeband zu bilden und dabei die Ränder des Bandes miteinander zu verbinden, so daß sich ein fester Schlauch ergibt. Diese Maßnahme zielt auf. die Gestaltung der Filterschicht als solche ab, nicht aber auf den Schutz des Faserstoffmantels beim Ablösen des Filterkuchens mittels Gegenstromspülung.As is well known, you can cut one off a precoat of fibrous material existing filter layer prevent that one on the Surface of the filter layer a fabric z. B. hangs up from gauze. However, this fabric does not serve that purpose Purpose to prevent an impermissibly strong deformation of the actual filter layer when it comes off of the filter cake is rinsed in countercurrent. It is also known to consist of a tubular filter element to form a helically wound fabric tape and thereby the edges of the tape together Connect so that a solid hose results. This measure aims at. the design of the filter layer as such, but not on the protection of the fiber jacket when the filter cake is detached by means of countercurrent flushing.
90» 707/9390 »707/93
Claims (4)
Publications (1)
Publication Number | Publication Date |
---|---|
DE1072458B true DE1072458B (en) | 1959-12-31 |
Family
ID=596921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT1072458D Pending DE1072458B (en) | Tubular filter element for dust separators |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1072458B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2503576A1 (en) * | 1981-04-14 | 1982-10-15 | Quiri Sa Usines | Oil filter cartridge for use at elevated temps. and pressures - involving bindings and felting made from glass filaments |
EP0202066A2 (en) * | 1985-05-10 | 1986-11-20 | Numatic International Limited | Filter |
-
0
- DE DENDAT1072458D patent/DE1072458B/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2503576A1 (en) * | 1981-04-14 | 1982-10-15 | Quiri Sa Usines | Oil filter cartridge for use at elevated temps. and pressures - involving bindings and felting made from glass filaments |
EP0202066A2 (en) * | 1985-05-10 | 1986-11-20 | Numatic International Limited | Filter |
EP0202066A3 (en) * | 1985-05-10 | 1988-01-20 | Numatic International Limited | Filter |
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