DK142264B - APPARATUS FOR CLEANING FILTER ELEMENTS IN DUST DISPENSER - Google Patents
APPARATUS FOR CLEANING FILTER ELEMENTS IN DUST DISPENSER Download PDFInfo
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- DK142264B DK142264B DK301773AA DK301773A DK142264B DK 142264 B DK142264 B DK 142264B DK 301773A A DK301773A A DK 301773AA DK 301773 A DK301773 A DK 301773A DK 142264 B DK142264 B DK 142264B
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- flushing
- chamber
- gas
- filter elements
- open
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Classifications
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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
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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
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
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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
- B01D46/0039—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
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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
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4272—Special valve constructions adapted to filters or filter elements
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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
- B01D46/66—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
- B01D46/715—Using pressurized gas at supersonic velocities
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Description
(11) FREMLÆGGELSESSKRIFT 1 42264 X^P.EL/ DANMARK (51) Int. Cl.3 B 01 D 46/04 §(21) Ansøgning nr. 3017/73 (22) indleveret den 30. maj 1973 (24) Lebedag 30. maj 1973 (44) Ansøgningen fremlagt og fremlaeggelsesskriftet offentliggjort den 6 · Okt · 1 980(11) PRESENTATION 1 42264 X ^ P.EL / DENMARK (51) Int. Cl.3 B 01 D 46/04 Section (21) Application No 3017/73 (22) filed on 30 May 1973 (24) Lebedag 30 May 1973 (44) The application presented and the petition published on 6 · Oct · 1 980
Dl REKTORATET FORDl THE RECTORATE FOR
PATENT-OG VAREMÆRKEVÆSENET (3°) Prioritet begæret fra denPATENT AND TRADEMARK (3 °) Priority requested from it
27. feb. 1973# 2309666, DEFeb 27 1973 # 2309666, DE
(71) INTENSrV-FILTEEt GMBH. & CO. KG, D-5602 Langeriberg, Vosskuhlstrasse "55a DE.(71) INTENSrV-FILTEEt GMBH. & CO. KG, D-5602 Langeriberg, Vosskuhlstrasse "55a DE.
(72> Opfinder: Heinz Meyer zu Riemsloh, D-457 Mari, Weissdornweg 4, DE.(72> Inventor: Heinz Meyer in Riemsloh, D-457 Mari, 4 Weissdornweg, DE.
(74) Fuldmægtig under sagene behandling:(74) Plenipotentiary in the proceedings:
Ingeniørfirmaet Lehmann & Ree._ (54) Apparat til afrensning af filter elementer i støvudeklllere.Lehmann & Ree._ (54) Apparatus for cleaning filter elements in dust coolers.
Opfindelsen angår et apparat til afrensning af hule, ved den ene ende åbne, udefra og indad med gasser, der skal renses, bestrålede filterelementer ved hjælp af skyllegasstråler, som under tryk og stødvis indefra og udad i modstrømsretning i forhold til gassen, der skal renses, blæses gennem filterelementerne, hvilke filterelementer er anbragte i en støvudskillers rågastilgangs-kammer og ved deres åbne ende er fastgjorte i åbninger i en mellem rågastilgangskammeret og støvudskillerens rengasafgangskammer anbragt bæreplade, på hvilken der oven over de åbne ender af filterelementerne er anbragt en række parallelt ved siden af hinanden stående skyllegaskarare, som hver til indføring af skyllegasstråler-ne under indsugning af rengas har en i åben forbindelse med rengas- 2 142264 afgangskammeret stående skyllegasindstrømningsdel med aflang, tilnærmelsesvis rektangulær indstrømningsåbning, på hvilken der over i det mindste en del af dens omkreds er anbragt en til en trykgasledning tilsluttet gasinjektor med en mod skyllegaskammerets indre rettet blæsedyse med spalteformet åbning.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a cavity cleaning apparatus, open at one end, externally and inwardly with gases to be purified, irradiated filter elements by means of flushing gas jets, which are pressurized and impacted from the inside outwards in a countercurrent direction relative to the gas to be purified. , are filtered through the filter elements, which filter elements are arranged in the raw access chamber of a dust separator and at their open end are fixed in openings in a carrier plate located between the raw separator chamber and the dust extractor chamber, on which is arranged parallel to the open ends of the filter elements. side-by-side flushing vessels, each of which for introducing the flushing gases during suction of the gas, has an open flushing gas inlet with an elongated, approximately rectangular inflow opening, which is at least part of its at least part of its is connected one to a compressed gas line gas injector with a blow nozzle with slot-shaped opening facing the interior of the purge chamber.
Der kendes afrensningsapparater til filterafstøvnings-anlæg, ved hvilke der ved hjælp af oven over midten af filterele-mentet eller i række anbragte trykgasfristråledyser sendes tryk-gasdrivstråler som primær skyllegas i modstrømsretning under samtidig medrivning af ekstra sekundær skylleluft ind i filterelementerne. Disse kendte apparater har en forholdsvis lav injektorvirkningsgrad fordi drivstråleimpulsen over centralt indsatte drivstråler med meget lille diameter skal forplantes til den omgivende injektorluft, der i forvejen bremses ved injektorvæggen.Filter dust cleaning systems are known in which, by means of above the center of the filter element or in series of pressurized gas free jet nozzles, pressurized gas propellant jets are sent as primary flushing gas in the countercurrent direction while simultaneously entraining additional secondary rinsing air into the filter elements. These known devices have a relatively low injector efficiency because the drive jet pulse over centrally inserted drive jets of very small diameter must be propagated to the surrounding injector air, which is already braked at the injector wall.
Ved et andet kendt afrensningsapparat til filterafstøv-ningsanlæg blæses der over blæsedyser, der er anbragte i række, trykluft ind i en fælles rektangulær injektor. Der må her påregnes en ringe virkningsgrad,fordi den cylindriske drivstråle skal spænde over et firkantet tværsnit. En optimal virkningsgrad og en optimal trykopbygning i injektoren kan desuden heller ikke opnås, fordi injektoren er anbragt ved slangen og lommen med sin stråleretning direkte i filterelementernes akseretning og enten skal anbringes inden i eller uden for filterelementet og derved begrænses i sin længde.In another known filter-dust cleaning apparatus, blowing nozzles arranged in series of compressed air are blown into a common rectangular injector. A small efficiency must be expected here, because the cylindrical drive beam must span a square cross-section. Also, an optimum efficiency and optimum pressure build-up in the injector cannot be achieved because the injector is positioned at the hose and pocket with its jet direction directly in the axis of the filter elements and must either be placed inside or outside the filter element and thereby limited in its length.
Ved et andet kendt apparat til afrensning af filterelementer i filterafstøvningsanlæg arbejdes der med skylleluft med lavt tryk. Hertil kræves forholdsvis store og komplicerede ventiler, dyser og rørledninger. Der forbruges forholdsvis megen skylleluft, og den ekstra indtrukne injektorluftmængde er lille, hvorfor en oplagring af skylleluft mellem de enkelte skylleimpulser kun er mulig med voluminøse og derfor kostbare vindkedler.Another known apparatus for cleaning filter elements in filter dusting systems is the use of low pressure rinsing air. For this, relatively large and complicated valves, nozzles and pipelines are required. A relatively high amount of flushing air is consumed, and the extra amount of injected air volume is small, which is why storage of flushing air between the individual flushing pulses is only possible with bulky and therefore expensive boilers.
Formålet med opfindelsen er at udforme et apparat af den indledningsvis nævnte art på en sådan måde, at der til eliminering af de påviste ulemper og mangler ved den beskrevne kendte teknik forhindres tab ved, at skyllegassen, som med høj hastighed indtræder i filterelementet, støder direkte mod de rammer eller afstandsmåtter, der bærer filterelementerne, og samtidig skal der stå et stort indstrømningstværsnit til rådighed til indsugning af returskyllegassen.The object of the invention is to provide an apparatus of the kind mentioned in the first instance in such a way that, in order to eliminate the disadvantages and shortcomings of the prior art described, losses are prevented by direct rinsing of the flushing gas entering the filter element directly. against the frames or spacer mats that carry the filter elements, and at the same time a large inflow cross-section must be available for suction of the return rinse gas.
1Λ 2 2 6 Λ 31Λ 2 2 6 Λ 3
Denne opgave løses ifølge opfindelsen ved, at hvert skyllegaskammers aflange, tilnærmelsesvis rektangulære indstrømningsåbning er anbragt med sin længdeakse forløbende i en vinkel på 90° på bærepladen, at der på hver af indstrømningsåbningens smalsider er anbragt en blæsedyse af samme længde som indstrømningsåbningens smalside, og som med sin spalteformede åbning forløber parallelt med smalsiden. Det tekniske fremskridt, som opnås herved, beror på flere fordele. Som følge af den drivvirkning, de primære vægstråler udøyer på den omgivende gas på grund af skyllekammerets åbne indstrømningstværsnit, rives store mængder sekundær retur-skyllegas ind i skyllekammeret. På grund af denne vægstrålestrømning langs med skyllekammerets smalsider accelereres de nært beliggende lag i skyllekammeret, og som følge af drivstrålens styrke forplantes en kraftig impuls til den omgivende strøm af sekundær skyllegas. Herved opnås særligt fordelagtige grader af injektorvirkning og et masse-strømforhold af drivstrålemængden i forhold til returskyllegasmængden på mellem 1:5 og 1:7. Afstanden mellem de ved hver sin side anbragte blæsedyser i det rektangulære tværsnit af skyllekammerets indstrømningsåbning kan være forholdsvis stor, idet den fra blæserdyserne udsendte drivstråle i forbindelse med skyllekammerets længde har en meget stor dybdevirkning. Ved hjælp af den vinkelrette anbringelse af skyllekammerets tilnærmelsesvis rektangulære indstrømningsåbning i forhold til bærepladen og dermed i forhold til længdeaksen af filterelementets indstrømningsåbning kan skyllekammeret udformes med stor længde, uden at filterhuset skal forøges tilsvarende, hvorved der kan opbygges et større tryk i skyllekammeret med en deraf følgende bedre afrensningsvirkning. Ved denne udformning undgås, at den med stor hastighed strømmende drivstråle, når der anvendes afstandsmåtter til at holde filterelementerne udspændte i afstand fra hinanden, støder direkte mod afstandsmåtternes tråde, og det er i det hele taget først nu ved hjælp af denne fordelagtige udformning muligt også at anvende den i og for sig kendte trykstød-modstrømsafrens-ning ved sådanne filterelementer, til hvilke der som afstandsholdere anvendes sådanne billige afstandsmåtter.This task is solved according to the invention in that the elongated, approximately rectangular inflow opening of each purifier chamber is arranged with its longitudinal axis extending at an angle of 90 ° to the carrier plate, that on each of the inflow opening's narrow sides is provided a blowing nozzle of the same length as with its slit-shaped opening extending parallel to the narrow side. The technical progress achieved here is based on several advantages. Due to the drive action of the primary wall jets on the surrounding gas due to the open flow section of the flushing chamber, large quantities of secondary return flushing gas are drawn into the flushing chamber. Due to this wall jet flow along the narrow sides of the flushing chamber, the adjacent layers of the flushing chamber are accelerated and, due to the power of the driving jet, a strong impulse is propagated to the surrounding stream of secondary flushing gas. This provides particularly advantageous degrees of injector action and a mass-current ratio of the drive jet amount to the return coolant amount of between 1: 5 and 1: 7. The distance between the blowing nozzles located on either side of the rectangular cross-section of the inflow chamber of the flushing chamber can be relatively large, the drive beam emitted from the blower nozzles in connection with the length of the flushing chamber having a very large depth effect. By means of the perpendicular arrangement of the approximately rectangular inflow opening of the flushing chamber with respect to the support plate and thus with respect to the longitudinal axis of the inflow opening of the filter element, the flushing chamber can be designed with great length without correspondingly increasing the filter housing with a larger pressure chamber. following better cleaning effect. This design prevents the high-flow driving beam, when using spacers to keep the filter elements spaced apart, directly against the spacers' threads, and this is only possible now with this advantageous design as well. to use the pressure shock countercurrent purge known per se in such filter elements to which such cheap spacers are used as spacers.
Til opnåelse af en optimal trykforøgelse i skyllekammeret er der i området mellem skyllekammeret og filterelementet anbragt en ledetunge med en i forhold til skyllekammerets højde og bredde optimal længde.In order to obtain an optimum pressure increase in the flushing chamber, a guide tongue of an optimum length relative to the height and width of the flushing chamber is arranged in the area between the flushing chamber and the filter element.
4 1422644 142264
Derved opnås en god føring af den nederste trykgasstråle og fordelagtige omsætningsgrader.This provides a good guide for the lower compressed gas jet and advantageous conversion rates.
Til opnåelse af en i videst muligt omfang tabsfri afbøjning af driv- og skyllegasstrømmen og en god overføring af trykket fra skyllekammeret til filterelementet er der anbragt i og for sig kendte ledeplader i skyllegaskammeret. På denne måde tilvejebringes en vægstrømning med stor hastighed ved skyllekam-merets vægflade.In order to obtain as far as possible a lossless deflection of the drive and purge gas flow and a good transfer of the pressure from the purge chamber to the filter element, known baffles in the purge gas chamber are known per se. In this way, a high velocity wall flow is provided at the wall surface of the rinsing chamber.
Til tilvejebringelse af en trykopbygning i det tilsluttede filterelement er skyllegaskammeret forsynet med parallelt med hinanden anbragte vægflader med til udnyttelse af drivstrålens strømnings impuls optimal længde.In order to provide a pressure build-up in the connected filter element, the purge gas chamber is provided with wall surfaces arranged parallel to one another with the optimum length of the impetus of the driving jet flow.
I en praktisk udformning er forholdet mellem skyllegas-kammerets smalside og længdeside 1:4 til 1:8, fortrinsvis 1:6.In a practical embodiment, the ratio of the narrow side of the purge gas chamber to the longitudinal side is 1: 4 to 1: 8, preferably 1: 6.
Derved kan der i forbindelse med skyllegaskammerets store længde, der er muliggjort som følge af dets anbringelse med indstrømningsåbningen vinkelret på bærepladen, opnås en optimal virkningsgrad og en optimal trykopbygning i skyllegaskammeret.Thereby, in connection with the large length of the purge gas chamber, which is made possible due to its placement with the inflow opening perpendicular to the carrier plate, an optimal efficiency and pressure build-up in the purge gas chamber can be obtained.
Soiti en særlig hensigtsmæssig foranstaltning, der er af væsentlig betydning, er hver i indstrømningsåbningen anbragt blæ-sedyse udformet som en lavaldyse med en spalteformet åbning, der i retningen mod skyllegaskammeret udvides kontinuerligt.Soiti, a particularly expedient measure which is of significant importance, each bladder nozzle disposed in the inlet opening is formed as a low-nozzle with a slit-shaped opening which is continuously expanded in the direction of the purge chamber.
En udførelsesform for apparatet ifølge opfindelsen er anskueliggjort på tegningen. På tegningen viser:An embodiment of the apparatus according to the invention is illustrated in the drawing. In the drawing:
Fig. 1 et længdesnit gennem apparatet ifølge opfindelsen set forfra, fig. 2 en blæsedyse i tværsnit og i større målestok, og fig. 3 apparatet set fra siden delvis i snit og med filterelementerne i den venstre halvdel trukket over afstandsmåtter og i den højre halvdel over støtterammer.FIG. 1 is a front view of a longitudinal section through the apparatus according to the invention; FIG. 2 is a cross-sectional and larger-scale blow nozzle; and FIG. 3 shows the device partly in section and with the filter elements in the left half pulled over spacers and in the right half over support frames.
Apparatet ifølge opfindelsen består af et hus 10, som er opdelt i et rengastilgangskammer 11 og et rengasafgangskammer 12.The apparatus according to the invention consists of a housing 10 which is divided into a clean access chamber 11 and a clean exit chamber 12.
Denne opdeling sker ved hjælp af en skillevæg 13, der er forsynet med et til antallet af filterelementer svarende antal slidsformede åbninger 17. Huset 10's rågastilgangskammer 11 har en rågasindstrøm-ningsåbning 14 til den støvfyldte rågas og er ved dets nederste ende, der indsnævres til en støvopsamlingsbeholder, forsynet med et kendt ikke nærmere vist udtømnings- og aflukningsorgan til udtag- 5 14226Λ ning af det frafiltrerede støv. Rengasafgangskammeret 12 har en rengasudstrømningsåbning 15 for rengassen. I de slidsformede åbninger 17 er der ophængt afstandsmåtter 18 eller støtterammer 19, som filterelementerne 20 kan trækkes over. Afstandsmåtterne 18 består af trådvæv eller trådfletning med en foroven påhægtet skrueformet snoet tråd 21, der ligger på de slidsformede åbninger 17's opadbøje-de kanter. Støtterammerne 19 består hver af to trådmåtter, der er anbragt i afstand fra hinanden, og med vinkelorganer 22 hviler på kanterne af de slidsformede åbninger 17. På dette sted er filterelementerne 20's åbningskanter aftættede mod skillevæggen 13.This division is effected by means of a partition 13 provided with a number of slit-shaped apertures corresponding to the number of filter elements 17. The raw-access chamber 11 of the housing 10 has a raw gas inlet opening 14 for the dust-filled raw gas and is at its lower end that narrows to a dust collection vessel, provided with a discharge and closure means not known in detail for withdrawing the filtered dust. The purge exhaust chamber 12 has a purge gas outlet opening 15 for the purge gas. In the slot-shaped openings 17, spacer mats 18 or support frames 19 are hung over which the filter elements 20 can be pulled. The spacer mats 18 consist of thread weave or braid with an upwardly threaded helical wire 21 lying on the curved edges of the slotted apertures 17. The support frames 19 each consist of two spaced apart wire mats, and with angular means 22 resting on the edges of the slotted apertures 17. At this location, the opening edges of the filter elements 20 are sealed against the partition wall 13.
Ί :Ί:
Inde i rengasafgangskammeret 12 er der parallelt med hvert filterelement 20's åbning anbragt et skyllekammer 23, der strækker sig over filterelementet 20's fulde længde og videre hen til rengasafgangskammeret 12's rengasudstrømningsåbning 15. Hvert skyllekammer 23 består af et langt smalt hus.24, som er åbent ved dets mod filterelementet 20 vendende smalside,og danner en åben forbindelse med filterelementet i form af en længdeslids. I den ved rengasafgangskammeret 12'srengasudstrømningsåbning 15 beliggende ende af hvert skyllekammer 23 er der på hver af dennes smalsider anbragt en blæsedyse 25, der er udformet som en lavaldyse med i retning ind mod huset 24 udvidet rektangulært tværsnit 26. Hver blæsedyse 25 er over en trykgasledning 27 og en magnetventil 28 forbundet med en trykgasbeholder 29.Inside the purge outlet chamber 12, a flushing chamber 23 is arranged parallel to the opening of each filter element 20, extending over the full length of the filter element 20 and further to the purge outlet chamber 15. The purge chamber 23 consists of a long narrow housing.24 which is open at its narrow side facing the filter element 20, and forms an open connection with the filter element in the form of a longitudinal slot. At the end of each flushing chamber 23 located at the purge outlet chamber 12 at the purge gas outflow opening 15, a blow nozzle 25 is formed on each of its narrow sides, which is formed as a low-nozzle with a rectangular cross section 26 extending towards the housing 24. pressure gas line 27 and a solenoid valve 28 connected to a pressure gas vessel 29.
Blæsedyserne 25 er anbragte på vægplader 30, der udgør skyllekamrene 23's smalsider, således at de trykgasstråler 31, der udsendes fra blæsedyserne 25, føres langs vægpladerne 30. Den mod filteråbningen vendende smalside 30 af skyllekammeret 23 er ved hjælp af en ledetunge 32 forlænget hen til længdeslidsen mellem blæ-sedysen 23 og filterelementet 20. I den bageste del af skyllekammeret 23 er der anbragt flere ledeplader 33.The blowing nozzles 25 are arranged on wall plates 30 which constitute the narrow sides of the flushing chambers 23, so that the compressed gas jets 31 emitted from the blowing nozzles 25 are passed along the wall plates 30. The narrow side 30 of the flushing chamber 23 facing the filter opening is extended to a the longitudinal slot between the blow nozzle 23 and the filter element 20. In the rear of the flushing chamber 23, several baffles 33 are arranged.
Apparatet ifølge opfindelsen arbejder på følgende måde:The apparatus according to the invention works as follows:
Den støvfyldte røggas føres til udskillelse af støvpartiklerne i pilretningen 34 gennem rågasindstrømningsåbningen 14 ind i rågas-tilgangskammeret 11. Rågassen strømmer udefra i pilretningerne 35 mod filterelementerne 20, der er trukket over afstandsmåtter 18 eller støtterammer 19, og gennem filterelementerne 20's vægge ind i filterelementerne. Herunder bliver støvpartiklerne siddende på ydersiden af filterelementerne 20's af tekstilstof bestående filtmateriale. Den rensede gas omledes i skyllekamrene 23 i pilretningen 36 og føres gennem skyllekamrene 23 og rengasudstrømningsåbningen 142264 6 15 i pilretningen 37 ud i det fri. Filterelementerne 20 afrenses under den normale filtreringsproces med mellemrum enkeltvis og fuldautomatisk i brøkdele af et sekund ved hjælp af trykgas. Hertil indblæses trykgassen i modsat retning af rengassens strømnings-retning. Den til afrensningen påkrævede trykgas frembringes ved hjælp af en ikke nærmere vist trykgaskompressor og tilføres trykgasbeholderen 29. I trykgasbeholderen 29 hersker et tryk på 6-8 atm. Ved åbning af den magnetventil 28, der hører til det filterelement 20, der skal afrenses i brøkdele af sekunder, udsendes der med mellemrum et trykgasstød over blæsedyserne 25 ind i skyllekammeret 23.The dust-filled flue gas is passed to separate the dust particles in the arrow direction 34 through the raw gas inlet opening 14 into the raw gas inlet chamber 11. The raw gas flows from the outside in the arrow directions 35 towards the filter elements 20 drawn over spacer mats 18 or support frames 19 and through the walls of the filter elements 20. Below this, the dust particles become seated on the outside of the filter elements 20's textile fabric felt material. The purified gas is diverted into the flushing chambers 23 in the direction of the arrow 36 and is passed through the flushing chambers 23 and the clean gas outlet opening 14 in the direction of the arrow 37 into the open. During the normal filtration process, the filter elements 20 are spaced apart individually and fully automatically in fractions of a second by means of pressurized gas. To this end, the compressed gas is blown in the opposite direction of the flow direction of the gas. The pressurized gas required for purification is produced by means of a compressed gas compressor not shown, and supplied to the pressurized gas container 29. A pressure of 6-8 atm prevails in the compressed gas container 29. Upon opening of the solenoid valve 28 belonging to the filter element 20 to be cleaned in fractions of seconds, a pressurized gas shock is emitted over the nozzles 25 into the flushing chamber 23 at intervals.
Ved en praktisk udførelsesform ligger impulstiden for det samlede trykgasstød mellem 100 og 200 msek., medens tidsrummet fra magnetventilens åbnen til opnåelse af rensningstrykket andrager 20-50 msek. således at trykforøgelsen i filterelementet 20 af hensyn til fjernelsen af støvet fra filtermaterialets yderside sker stødvis.In a practical embodiment, the pulse time for the total thrust gas is between 100 and 200 msec, while the time from the solenoid valve opening to achieve the purge pressure is 20-50 msec. so that the pressure increase in the filter element 20 for the sake of removing the dust from the outside of the filter material occurs shockingly.
Trykgasstrømningen i blæsedyserne 25 når herunder op på overlydshastighed og river over skyllekammeret 23's indstrømnings-åbning 23a ekstra sekundær skyllegas tilbage fra rengasstrømmen.The pressurized gas flow in the blowing nozzles 25 then reaches over-noise velocity and rises additional secondary flushing gas from the purge chamber 23a of the flushing chamber 23a from the purge gas stream.
I skyllegaskammeret 23 opbygges et tryk, og hele den af primær- og sekundærskyllegas bestående skyllegasmængde føres langs skyllekammeret 23’s vægplader 30, afbøjes ved ledepladerne 33 og presses over den slidsformede forbindelse mellem skyllekammeret og filterelementet 20 brat ind i filterelementet 20.In the rinse chamber 23, pressure is built up and the entire amount of primary and secondary rinse gas is passed along the wall plates 30 of the rinse chamber 23, deflected by the baffles 33 and pressed across the slit-shaped connection between the rinse chamber and the filter element 20 abruptly into the filter element 20.
Trykgasafrensningen udfører herunder følgende tre funktioner: 1. Den normale filtreringsstrømning afbrydes i et kort tidsrum, 2. filterelementet blæses brat op ved hjælp af trykgasstrømmen i modstrømsretning, og 3. det støvlag, der er aflejret på filtermaterialet, afblæses ved hjælp af den primære trykgasstrøm og den fra skylle-kammerets indstrømningsåbning medrevne sekundære skyllegas-strøm.The pressurized gas purge performs the following three functions including: 1. The normal filtration flow is interrupted for a short period of time, 2. the filter element is inflated abruptly by the pressurized gas flow in the countercurrent direction, and 3. the dust layer deposited on the filter material is blown off by means of the primary pressurized gas stream. and the secondary purge gas stream provided from the inflow opening of the flushing chamber.
Det støvlag, som på denne måde fjernes fra filterelementerne 20, samles i huset 10's støvopsamlingsbeholder og fjernes fra denne over de ikke nærmere viste kendte udtømnings- og afspærringsorganer.The dust layer thus removed from the filter elements 20 is collected in the dust collection container of the housing 10 and removed from it over the known discharge and shut-off means not shown.
Efter at magnetventilen 28 atter er lukket, opstår der atter normal filtreringsstrømning i det rensede filterelement.After the solenoid valve 28 is closed again, normal filtration flow again occurs in the purified filter element.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2309666 | 1973-02-27 | ||
DE19732309666 DE2309666C3 (en) | 1973-02-27 | Cleaning device |
Publications (2)
Publication Number | Publication Date |
---|---|
DK142264B true DK142264B (en) | 1980-10-06 |
DK142264C DK142264C (en) | 1981-03-02 |
Family
ID=5873201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK301773A DK142264C (en) | 1973-02-27 | 1973-05-30 | APPARATUS FOR CLEANING FILTER ELEMENTS IN DUST DISPENSER |
Country Status (9)
Country | Link |
---|---|
AT (1) | AT356073B (en) |
BE (1) | BE799889A (en) |
CH (1) | CH565582A5 (en) |
DK (1) | DK142264C (en) |
FR (1) | FR2218923B1 (en) |
GB (1) | GB1430135A (en) |
IT (1) | IT989123B (en) |
NL (1) | NL151268B (en) |
SE (1) | SE435812B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3813259A1 (en) * | 1988-04-20 | 1989-11-02 | Nordson Corp | POWDER RECOVERY DEVICE FOR POWDER COATING PLANTS OR THE LIKE |
-
1973
- 1973-04-25 AT AT367873A patent/AT356073B/en not_active IP Right Cessation
- 1973-04-27 CH CH607973A patent/CH565582A5/xx not_active IP Right Cessation
- 1973-05-16 FR FR7317773A patent/FR2218923B1/fr not_active Expired
- 1973-05-22 BE BE131406A patent/BE799889A/en not_active IP Right Cessation
- 1973-05-25 GB GB2504373A patent/GB1430135A/en not_active Expired
- 1973-05-30 DK DK301773A patent/DK142264C/en active
- 1973-05-30 NL NL737307538A patent/NL151268B/en not_active IP Right Cessation
- 1973-06-04 SE SE7307867A patent/SE435812B/en unknown
- 1973-06-13 IT IT25306/73A patent/IT989123B/en active
Also Published As
Publication number | Publication date |
---|---|
AT356073B (en) | 1980-04-10 |
DE2309666A1 (en) | 1974-09-05 |
FR2218923A1 (en) | 1974-09-20 |
BE799889A (en) | 1973-09-17 |
IT989123B (en) | 1975-05-20 |
DE2309666B2 (en) | 1976-03-25 |
NL7307538A (en) | 1974-08-29 |
ATA367873A (en) | 1979-09-15 |
SE435812B (en) | 1984-10-22 |
NL151268B (en) | 1976-11-15 |
GB1430135A (en) | 1976-03-31 |
DK142264C (en) | 1981-03-02 |
FR2218923B1 (en) | 1977-09-02 |
CH565582A5 (en) | 1975-08-29 |
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