CH655170A5 - PNEUMATIC DRYER-FILTER GROUP FOR GRANULAR OR DUSTY MATERIALS. - Google Patents
PNEUMATIC DRYER-FILTER GROUP FOR GRANULAR OR DUSTY MATERIALS. Download PDFInfo
- Publication number
- CH655170A5 CH655170A5 CH794/83A CH79483A CH655170A5 CH 655170 A5 CH655170 A5 CH 655170A5 CH 794/83 A CH794/83 A CH 794/83A CH 79483 A CH79483 A CH 79483A CH 655170 A5 CH655170 A5 CH 655170A5
- Authority
- CH
- Switzerland
- Prior art keywords
- sleeves
- chamber
- dryer
- filtering
- filter
- Prior art date
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
- B01D46/02—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
- B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
- B01D46/0041—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding
- B01D46/0046—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding provoking a tangential stream
-
- 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
- B01D46/66—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/005—Separating solid material from the gas/liquid stream
- B01J8/006—Separating solid material from the gas/liquid stream by filtration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Drying Of Solid Materials (AREA)
Description
La presente invenzione concerne un gruppo essiccatoio-filtro pneumatico per materiali granulari o polverulenti. The present invention relates to a pneumatic dryer-filter unit for granular or powdery materials.
Nei normali gruppi di essiccazione per materiali granulari e simili, l'aria preveniente dallo essiccatoio e che trasporta in sospensione delle polveri viene filtrata facendola passare all'interno delle maniche filtranti, mentre quella pulita viene aspirata all'esterno di dette maniche e reimmessa nella atmosfera o anche riciclata opportunamente. In normal drying groups for granular materials and the like, the air coming from the dryer and transporting the powders in suspension is filtered by passing it inside the filter sleeves, while the clean one is sucked out of the sleeves and returned to the atmosphere. or even recycled appropriately.
Lo strato o pannello di polveri che si raccoglie all'interno di dette maniche, ostacola in breve tempo il passaggio dell'aria diminuendo il rendimento del gruppo. Pertanto questi filtri sono provvisti di opportuni sistemi di scuotimento meccanico delle maniche filtranti per rimuovere dalle loro pareti interne Io strato di polvere depositato. Questa operazione deve avvenire frequentemente mentre l'asportazione delle polveri rimosse e che ricadono all'interno delle maniche, risulta laboriosa. The layer or panel of dust that collects inside said sleeves hinders the passage of air in a short time, decreasing the efficiency of the group. Therefore these filters are provided with suitable mechanical shaking systems of the filtering sleeves to remove the deposited layer of dust from their internal walls. This operation must occur frequently while the removal of the powders removed and falling inside the sleeves is laborious.
Scopo del presente trovato è quello di realizzare un gruppo essiccatoio-filtro nel quale il deposito delle polveri avviene all'esterno delle maniche a filtro e dove la pulitura delle maniche stesse, che viene effettuata ciclicamente ed in modo automatico, resta agevolata in quanto dette polveri possono ricadere ed essere raccolte nella camera di essiccazione direttamente sottostante alla camera di filtrazione. The object of the present invention is to provide a dryer-filter unit in which the deposition of the dust takes place outside the filter sleeves and where the cleaning of the sleeves themselves, which is carried out cyclically and automatically, remains facilitated in that said powders they can fall and be collected in the drying chamber directly below the filtration chamber.
Il gruppo secondo l'invenzione dove il materiale granulare o polverulento è distribuito sotto forma di letto fluido sulla griglia dell'essiccatoio al di sopra del quale è posta la camera con le maniche filtranti provviste di mezzi per rimuovere da esse le polveri ivi depositate, si caratterizza in ciò che la camera di filtrazione si collega direttamente con la sottostante camera di essiccazione, mentre l'aria sporca viene convogliata nelle maniche filtranti in senso centripeto per raccogliere le polveri all'esterno di dette maniche facilitando così la ricaduta e la raccolta di tali polveri nel sottostante essiccatoio. The group according to the invention where the granular or powdery material is distributed in the form of a fluid bed on the grid of the dryer above which the chamber with the filtering sleeves is provided, provided with means for removing the dust deposited therein, characterizes in that the filtration chamber connects directly with the underlying drying chamber, while the dirty air is conveyed in the filter sleeves in a centripetal sense to collect the dust outside of said sleeves thus facilitating the relapse and collection of these powders in the underlying dryer.
È così realizzato un gruppo essiccatoio-filtro che provvede nel senso di assicurare e agevolare la rimozione delle polveri depositate sulle maniche filtranti, assicurando la portata media dell'aria filtrata, aumentando la produttività e quindi l'economia di esercizio del gruppo. A dryer-filter unit is thus created which ensures and facilitates the removal of the dust deposited on the filter sleeves, ensuring the average flow rate of the filtered air, increasing the productivity and therefore the operating economy of the group.
Le maniche filtranti sono combinate con ugelli a pressione di fluido associati con le aperture delle maniche stesse in modo da provocare il distacco dello strato o pannello di polveri depositato all'esterno di dette maniche per farlo ricadere nell'essiccatoio. The filtering sleeves are combined with fluid pressure nozzles associated with the openings of the sleeves themselves so as to cause the detachment of the layer or panel of dust deposited outside the said sleeves to make it fall back into the dryer.
L'invenzione verrà ora spiegata con riferimento all'annesso disegno che illustra a titolo esemplificativo una forma di realizzazione del gruppo essiccatoio-filtro con dispositivo di rimozione e pulitura pneumatico. The invention will now be explained with reference to the attached drawing which illustrates by way of example an embodiment of the dryer-filter unit with pneumatic removal and cleaning device.
Precisamente: Precisely:
le figg. 1 e 2 rappresentano in alzato e in pianta il gruppo essiccatoio-filtro secondo l'invenzione con parti sezionate. figs. 1 and 2 show an elevation and a plan view of the dryer-filter unit according to the invention with sectioned parts.
Nelle figure de disegno l'essiccatoio del gruppo è indicato con A e il filtro con B. La camera di essiccazione 2 riceve il materiale polverulento umido introdotto da una coclea K e che viene sottoposto dal basso ad una corrente d'aria, proveniente da una camera sottostante 4 nella quale l'aria è immessa dalla depressione creata dal filtro B e/o prodotta da un ventilatore 6, Combinato con un dispositivo di preriscaldamento 7. In the figures of the drawing, the dryer of the group is indicated with A and the filter with B. The drying chamber 2 receives the wet powdery material introduced by an auger K and which is subjected from below to an air flow, coming from a underlying chamber 4 in which the air is introduced by the depression created by the filter B and / or produced by a fan 6, combined with a preheating device 7.
L'aria calda proveniente dalla bocca di mandata 8, attraversa il materiale da essiccare posto sulla griglia della camera di essiccazione 2 e viene convogliata attraverso opportune aperture previste da una piastra 10 che separa l'essiccatoio A dal soprastante filtro B e che delimita in quest'ultimo la camera di filtrazione 12. Tale camera alloga una pluralità di filtri a manica 14 trattenuti alla loro estremità superiore da una piastra porta filtri 16 che delimita superiormente a detta camera 12 una camera di aspirazione 18 collegata ad un aspiratore 20 che aspira aria calda dal dispositivo 7 il quale, come già detto e se richiesto è associato con il ventilatore 6. The hot air coming from the delivery port 8 passes through the material to be dried placed on the grid of the drying chamber 2 and is conveyed through suitable openings provided by a plate 10 which separates the dryer A from the above filter B and which delimits it. last is the filter chamber 12. This chamber contains a plurality of bag filters 14 held at their upper end by a filter holder plate 16 which delimits above said chamber 12 a suction chamber 18 connected to an aspirator 20 which sucks hot air. by the device 7 which, as already said and if required, is associated with the fan 6.
Ogni manica filtrante 14 trattenuta dalla piastra 16 presenta in corrispondenza della sua apertura un ugello 22 combinato con un Venturi e alimentato da un gas in pressione alimentato da una condotta 26. Each filter sleeve 14 retained by the plate 16 has, at its opening, a nozzle 22 combined with a Venturi and fed by a pressurized gas fed by a duct 26.
L'aria sporca proveniente dall'essiccatoio A attraversa le maniche 14 in senso centripeto e la polvere si deposita all'esterno di dette maniche e forma un pannello stratificato esterno, mentre l'aria pulita viene aspirata dal ventilatore 20. L'aria pulita può essere cosi scaricata oppure riciclata entro l'essiccatoio A sia direttamente che attraverso il ventilatore 6. The dirty air coming from the dryer A passes through the sleeves 14 in a centripetal sense and the dust settles on the outside of these sleeves and forms an external stratified panel, while the clean air is sucked in by the fan 20. The clean air can thus being discharged or recycled into the dryer A both directly and through the fan 6.
Gli ugelli soffianti 22 sono controllati da una o più elettrovalvole H comandate ciclicamente per controllare l'immissione in gruppi di maniche filtranti 14 di getti di aria compressa aprendo la comunicazione fra un collettore 24 e i condotti 26. The blowing nozzles 22 are controlled by one or more solenoid valves H cyclically controlled to control the injection of compressed air jets into groups of filter sleeves 14 by opening the communication between a manifold 24 and the ducts 26.
L'azione dei getti di aria in pressione viene esaltata e incrementata dai boccagli Venturi 22 in modo che all'interno delle maniche considerate si crea una pressione maggiore di quella presente nella camera di filtrazione 12 e che provoca il distacco dello strato o pannello di polvere presente su tali maniche. La rimozione dello strato esterno di polvere è facilitato in misura rilevante iti quanto l'aria in pressione all'interno della manica filtrante 14 considerata dilata e gonfia detta manica provocando così la rottura e il distacco del pannello o strato di polvere che cade o sul fondo della camera di filtrazione 12 (da dove può essere rimossa in modo noto) oppure nella sottostante camera di essiccazione 2. The action of the pressurized air jets is enhanced and increased by the Venturi nozzles 22 so that a greater pressure is created inside the sleeves considered than that present in the filtering chamber 12 and which causes the detachment of the layer or panel of dust present on these sleeves. The removal of the external layer of dust is facilitated to a significant extent as much as the air under pressure inside the filtering sleeve 14 considered to be dilated and inflates said sleeve thus causing breakage and detachment of the panel or layer of dust that falls or on the bottom of the filtration chamber 12 (from where it can be removed in a known way) or in the underlying drying chamber 2.
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655 170 655 170
Il materiale polverulento essiccato viene scaricato attraverso la bocca 9 presentata lateralmente dall'essiccatoio A e opportunamente raccolto. The dried powdery material is discharged through the mouth 9 presented laterally by the dryer A and suitably collected.
Da quanto precede risulta evidente il conseguimento degli scopi prefissi dall'invenzione; in particolare si assicura la continuità e l'efficienza automatica della filtrazione in quanto si impedisce la formazione sulle maniche filtranti 14 degli strati di polvere di spessore eccessivo che ostacolerebbero il passaggio dell'aria. Inoltre con il gruppo secondo l'invenzione è possibile trattare materiali di diversa granulometria fino a pochi micron mantenendo delle portate medie di aria da 5 a 10 volte superiore rispetto a quella che si verifica normalmente negli impianti noti ove lo strato o pannello di polvere è trattenuto aderente 5 sulla superficie filtrante delle maniche a filtro in quanto tale strato è posto all'interno di dette maniche e durante la pulizia di tali maniche la pressione d'aria esercitata all'esterno delle maniche restringe queste ultime e costipa in senso çentripeto lo strato di polvere. From the foregoing, the achievement of the aims set by the invention is evident; in particular, the automatic continuity and efficiency of the filtration is ensured since the formation on the filtering sleeves 14 of the layers of dust of excessive thickness which would hinder the passage of air is prevented. Furthermore, with the group according to the invention it is possible to treat materials of different granulometry down to a few microns while maintaining average air flow rates of 5 to 10 times higher than that which normally occurs in known systems where the layer or panel of dust is retained adherent 5 on the filtering surface of the filter sleeves since this layer is placed inside said sleeves and during the cleaning of these sleeves the air pressure exerted outside the sleeves restricts the latter and constipates the layer of powder.
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1 foglio disegni 1 sheet of drawings
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8221133U IT8221133V0 (en) | 1982-03-15 | 1982-03-15 | DRYER-FILTER UNIT WITH DEVICE FOR CLEANING FILTERS. |
Publications (1)
Publication Number | Publication Date |
---|---|
CH655170A5 true CH655170A5 (en) | 1986-03-27 |
Family
ID=11177230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH794/83A CH655170A5 (en) | 1982-03-15 | 1983-02-11 | PNEUMATIC DRYER-FILTER GROUP FOR GRANULAR OR DUSTY MATERIALS. |
Country Status (7)
Country | Link |
---|---|
CH (1) | CH655170A5 (en) |
DE (1) | DE8306217U1 (en) |
DK (1) | DK62883A (en) |
ES (1) | ES270454Y (en) |
FR (1) | FR2522981A1 (en) |
GB (1) | GB2116872B (en) |
IT (1) | IT8221133V0 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3412000A1 (en) * | 1984-03-31 | 1985-10-10 | Dr. Madaus & Co, 5000 Köln | PNEUMATIC MIXING DEVICE FOR SCHUETTGUETER |
DE9302136U1 (en) * | 1993-02-15 | 1993-04-01 | Draiswerke Gmbh, 6800 Mannheim | Mixer-dryer |
WO1996033793A1 (en) * | 1993-09-23 | 1996-10-31 | Gubler Scott A | Compact flexible filter assembly for a fluid bed granulator, coater or dryer |
JP2003524142A (en) * | 2000-02-25 | 2003-08-12 | グラツト ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method for producing particulate articles |
RU186511U1 (en) * | 2018-09-03 | 2019-01-22 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | PLANT FOR PROCESSING BULK BODIES IN A PSEUDO-LIQUID LAYER |
CN110530142A (en) * | 2019-09-10 | 2019-12-03 | 连云港市沃鑫高新材料有限公司 | The drying system of carborundum powder |
CN110595186A (en) * | 2019-09-20 | 2019-12-20 | 刘涛 | Material drying device is used in grain oil processing |
CN114165991A (en) * | 2021-12-21 | 2022-03-11 | 江苏国朗机械制造有限公司 | Quick boiling formula drying equipment of fodder granule |
CN114251926B (en) * | 2021-12-30 | 2023-03-14 | 宜春万申制药机械有限公司 | Boiling dryer |
DE102022108651A1 (en) * | 2022-04-08 | 2023-10-12 | Gausling Engineering GmbH & Co. KG | Method for cleaning a filter system in a dryer |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB812244A (en) * | 1956-07-09 | 1959-04-22 | Metals Disintegrating Co | A gas filtering apparatus |
DE1507839A1 (en) * | 1965-07-22 | 1970-01-02 | Josef Pausch | Method and device for cleaning filter media |
AT298514B (en) * | 1967-08-03 | 1972-05-10 | Josef Pausch | Device for backwashing a dust separation device with tubular filter elements |
US3503184A (en) * | 1968-03-07 | 1970-03-31 | Aluminum Co Of America | Treatment of gases evolved in the production of aluminum |
US3735566A (en) * | 1971-01-04 | 1973-05-29 | Carborundum Co | Control system for a filtering apparatus |
DE2332031B2 (en) * | 1973-06-23 | 1979-03-22 | Intensiv-Filter Gmbh & Co Kg, 5602 Langenberg | Cleaning device for gas filter elements |
CH612003A5 (en) * | 1976-03-02 | 1979-06-29 | Kuelling Hans Peter | |
GB2050199B (en) * | 1979-05-21 | 1983-09-01 | American Air Filter Co | Filter bag-mounting arrangement |
-
1982
- 1982-03-15 IT IT8221133U patent/IT8221133V0/en unknown
-
1983
- 1983-02-11 CH CH794/83A patent/CH655170A5/en not_active IP Right Cessation
- 1983-02-14 DK DK62883A patent/DK62883A/en not_active Application Discontinuation
- 1983-02-21 ES ES1983270454U patent/ES270454Y/en not_active Expired
- 1983-03-04 DE DE19838306217U patent/DE8306217U1/en not_active Expired
- 1983-03-11 FR FR8304019A patent/FR2522981A1/en active Granted
- 1983-03-15 GB GB08307168A patent/GB2116872B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE8306217U1 (en) | 1983-07-21 |
GB2116872A (en) | 1983-10-05 |
GB8307168D0 (en) | 1983-04-20 |
IT8221133V0 (en) | 1982-03-15 |
FR2522981A1 (en) | 1983-09-16 |
GB2116872B (en) | 1985-08-07 |
ES270454U (en) | 1983-11-01 |
ES270454Y (en) | 1984-05-01 |
DK62883A (en) | 1983-09-16 |
FR2522981B3 (en) | 1985-03-01 |
DK62883D0 (en) | 1983-02-14 |
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Legal Events
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PL | Patent ceased |