EP3938073A1 - Ensemble filtre à la manière d'un séparateur centrifuge doté d'un corps de turbulence - Google Patents

Ensemble filtre à la manière d'un séparateur centrifuge doté d'un corps de turbulence

Info

Publication number
EP3938073A1
EP3938073A1 EP20715279.4A EP20715279A EP3938073A1 EP 3938073 A1 EP3938073 A1 EP 3938073A1 EP 20715279 A EP20715279 A EP 20715279A EP 3938073 A1 EP3938073 A1 EP 3938073A1
Authority
EP
European Patent Office
Prior art keywords
flow
filter
longitudinal axis
filter element
arrangement according
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.)
Withdrawn
Application number
EP20715279.4A
Other languages
German (de)
English (en)
Inventor
Georg Klass
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
Priority claimed from PCT/EP2020/056428 external-priority patent/WO2020187653A1/fr
Publication of EP3938073A1 publication Critical patent/EP3938073A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
    • B01D29/945—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B01D29/115—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/904—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding directing the mixture to be filtered on the filtering element in a manner to clean the filter continuously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/908—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having 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
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00

Definitions

  • the invention relates to a filter arrangement of the type
  • Generic filter arrangements which are designed in the manner of a centrifugal separator and are often also referred to as cyclone filters, use the separating effect of centrifugal force, which acts on particles of solid substances contained within a gaseous or liquid swirl flow.
  • a rotationally symmetrically designed filter housing which is essentially tubular and laterally eccentric, serves to generate the swirl flow
  • Longitudinal axis provides a flow inlet through which the medium to be filtered is fed in with the formation of a swirl flow oriented around the longitudinal axis.
  • a tubular filter element is attached within the filter housing, which is subjected to a vacuum
  • the filter grain size of the filter wall is selected in a suitable manner, so that on the one hand a desired filter effect and on the other hand a sufficient flow passage through the filter wall into the interior of the filter element to produce a cleaned, i.e. filtered mass flow can be achieved.
  • the document EP 2 049 222 B1 discloses a generic filter device for separating impurities from a fluid stream by using a filter element which is accommodated in a filter housing, the
  • the filter housing has a swirl chamber in such a way that the fluid flow to be filtered is at least partially guided around the filter element in a swirl flow.
  • An inlet through which the medium to be filtered is fed opens into the swirl chamber, which is designed in the form of a conical widening of the filter housing, eccentrically to the longitudinal axis.
  • the filter element extending along the filter housing tapers conically with increasing distance from the swirl chamber and is connected in a fluid-tight manner in the area of the swirl chamber to an outlet for the filtered medium from the interior of the filter element.
  • filtering fluid flow which helically flows over the elongated tubular filter element with the formation of a swirl flow and, when pressurized, passes radially from the outside through the filter wall into the interior of the filter element, removing particles of solid substances.
  • the cleaned filtrate flow is pressure-driven from the inside of the filter element via the drain to the outside.
  • Filter cleaning measures often required. For example, backwashing the filter arrangement with cleaning air is suitable for this purpose.
  • the document DE 198 44 441 A1 describes a device for separating particles from a fluid with a rotating filter.
  • the document DE 198 11 090 A1 discloses a cyclone separator with a rotationally symmetrical housing, an inlet for a fluid containing dispersed substances and in each case at least one outlet for the dispersed substances and for the cleaned fluid.
  • the inlet opens into an annular channel.
  • a part of the housing wall is formed in the fleas of the annular channel in the form of a flow straightener connecting the annular channel to the interior of the housing.
  • the inside of the housing is in the form of a front end
  • Shell-shaped bottom wall is formed, the bottom wall being penetrated by a pipe arranged concentrically to the longitudinal axis, which protrudes from the bottom wall in the direction of one end face and serves as an outlet for the cleaned fluid.
  • a pipe arranged concentrically to the longitudinal axis, which protrudes from the bottom wall in the direction of one end face and serves as an outlet for the cleaned fluid.
  • In the bottom wall are near the pipe
  • Drainage openings are provided which serve as an outlet for the dispersed substances.
  • the invention is based on the object of a filter arrangement in the manner of a centrifugal separator or cyclone filter with a filter around a longitudinal axis
  • a filter arrangement according to the solution with the features of the preamble of claim 1 is characterized in that a number of rod-like turbulence bodies are provided in a circular arrangement around the filter element, which are in the form of round, oval or N-shaped rods or pins in cross section and their longitudinal extensions are each oriented parallel to the longitudinal axis of the straight hollow cylinder-shaped filter element.
  • the helical flow of the fluid to be filtered that forms within the separation channel flows around the radially outer jacket surface or the outer one
  • Hollow-cylindrical filter element are attached, eddies form downstream of the overflow and / or flow around each of the turbulence bodies, in the form of so-called Lee vortices, through which material settling
  • the Lee vortices represent local flow rotors, with a
  • Rotor vortex orientation that is opposite to the overflow and / or flow around the direction is directed.
  • the filter wall is acted upon in these flow regions with fluid flow components which are oriented largely orthogonally towards and away from the filter wall.
  • this is also continuously cleaned.
  • the turbulence bodies are preferably each arranged with an equidistant circular spacing around the filter element and each extend along the entire length of the filter element.
  • the turbulence bodies can either be attached seamlessly directly to the outer surface of the straight, hollow cylinder-shaped filter element or attached to the outer surface of the straight, hollow-cylindrical filter element with a spacing or different spacing.
  • the gap that is locally enclosed by the turbulence bodies with the filter wall preferably has a gap or spacing that corresponds to at least half of a largest diameter that can be assigned to the cross section of the turbulence body and at most three times the largest diameter.
  • the Bernoulli effect comes into play when the air flows through the gap, which results in an increase in flow velocity with a simultaneous local Adjust pressure drop.
  • the Bernoulli effect thus helps to clean and keep the filter wall openings clean.
  • the hollow cylindrical filter element preferably has a perforated sheet metal or a composite of at least two lattice structure or wire mesh layers, each with lattice openings, the lattice openings of which differ at least in opening size.
  • that layer with the smaller lattice openings is arranged radially on the outside.
  • the at least one lattice structure or wire mesh layer arranged radially on the outside has elongated lattice or wire segments, the longitudinal extent of which is oriented parallel to the longitudinal axis.
  • Turbulence bodies on and around the hollow cylindrical filter element in the form of an arrangement fixed in space to the filter element can advantageously be used in cyclone filters which are operated in different ways.
  • a preferred embodiment provides for the integration of the turbulence bodies in accordance with the solution in a filter arrangement, in which a region of the flow channel axially opposite the swirl space to the longitudinal axis
  • the flow outflow emerges eccentrically and transversely to the longitudinal axis from the separation channel, which is fluidically connected to a first suction unit that generates a flow suction.
  • the flow inlet is pressurized with a fluid to be filtered, with a helical flow forming within the flow channel and oriented around the longitudinal axis with a flow direction specified by the swirl chamber and one exclusively through the first
  • Turbulence body flows over transversely or obliquely to their longitudinal extensions.
  • the filtrate space has a filtrate outlet in which a second suction unit is arranged, which generates a flow suction.
  • An alternative filter arrangement provides a pressure source along the flow inlet through which a pressurized fluid to be filtered reaches the swirl space, with a helical flow forming within the flow channel and oriented around the longitudinal axis with a predetermined through the swirl space
  • a filter arrangement designed according to the solution is particularly suitable for the filtration of fluids in the form of aerosols or suspensions, in which a fluid to be filtered is provided to the filter arrangement through the flow inlet in a pressureless or pressure-driven manner.
  • Fig. 1 a longitudinal section through a vacuum-operated filter arrangement
  • Fig. 1b is a longitudinal section through an overpressure-operated filter arrangement
  • FIG. 2b cross-sectional view of a filter element spaced apart from
  • the filter arrangement 1 has a filter housing 2, which is preferably designed in one piece, and an upper swirl chamber 3 as well as a preferably conically tapering, immediately adjoining downward
  • Separation channel 4 includes. However, the separation channel can also
  • the filter housing 2 is essentially rotationally symmetrical about the longitudinal axis 5 and, in the area of the swirl space 3, has a flow inlet 6 which opens into the swirl space 3 essentially transversely to the longitudinal axis 5 and eccentrically to the longitudinal axis 5.
  • a gaseous or liquid fluid F to be filtered flows in through the flow inlet 6.
  • the filter housing 2 comprising the swirl chamber 3 is in this area
  • the swirl space 3 is sealed fluid-tight on one side upward to the longitudinal axis 5 and opens along the longitudinal axis 5 directly into the conically shaped separation channel 4
  • a cylindrical filter element 7 extends through the longitudinal axis 5 through the swirl space 3 and the separation channel 4. In this way, an effective swirl flow D with a high swirl number can develop within the swirl space 3 before the swirl flow D passes into the separation channel 4 with the formation of a helical flow H.
  • the suction unit 9 the fluid F to be filtered is fed into the interior of the Filter housing 1 sucked, whereby the entering the swirl chamber 3, to be filtered fluid F through the predetermined cylindrical contour in a
  • Swirl flow D is forced in the area of the swirl space 3 and the
  • the straight hollow cylinder-shaped filter element 7 has, at its end region facing away from the swirl chamber 3, a filtrate drain 10, along which a second suction unit 11 is arranged.
  • a second suction unit 11 is arranged.
  • the filter effect can be individually adapted by means of the second suction unit 11.
  • the throughput of the fluid F to be filtered which passes through the entire filter arrangement along the swirl chamber 3 and the separation channel 4, can be preset by means of the first suction unit 9.
  • the fluid can be fed under pressure instead of a pressureless fluid feed.
  • a fluid feed pump 12 is arranged in the flow inlet 6, which, driven by pressure, feeds the fluid F into the swirl space 3 and the adjoining separation channel 4, forming the swirl and helical flow D, H, see FIG. 1 b.
  • the straight hollow cylinder-shaped filter element 7 is fluidically connected to a filtrate drain 10, via which the cleaned filtrate emerges from the filter arrangement.
  • the filter element 7 which is preferably designed in the shape of a straight hollow cylinder, has a filter wall which preferably consists of a perforated, largely mechanically wear-resistant sheet metal.
  • a filter wall which preferably consists of a perforated, largely mechanically wear-resistant sheet metal.
  • Wire mesh layer is arranged with the respective smaller grid openings radially outside to the straight hollow cylinder-shaped filter element.
  • the lattice structure or wire mesh layer which is arranged at least radially on the outside and preferably has elongated lattice or wire segments, in such a way that the longitudinal extension of the lattice or
  • Wire segments is oriented as parallel as possible to the longitudinal axis 5 of the filter arrangement. In this way, each individual grid opening is formed close to the surface
  • the filter arrangement 1 is characterized in that in a circular, preferably uniformly distributed arrangement around the straight cylinder-shaped filter element 7, a number of rod-like formed turbulence body 13, for example in the form of rods or pins with a round, oval or N-cornered cross section, see FIG. 2a, is attached, the longitudinal extensions of which are each oriented parallel to the longitudinal axis 5 of the straight hollow cylinder-shaped filter element 7.
  • the rod-like turbulence body 13 can directly, s. 2a, or be arranged at a distance from the filter wall surface of the filter element, see FIG. Figure 2b.
  • the rod-like turbulence bodies 13 are overflowed by the helical flow H obliquely or orthogonally to their longitudinal extension, whereby in each case in
  • Form flow vortices so-called Lee vortices 14, which prevent or at least make it more difficult for particles to settle in and on the filter wall openings.
  • turbulence bodies 13 are made of abrasion-resistant material, preferably metal, solder, weld or adhesive connections are suitable.
  • Turbulence bodies 13 need to be attached directly or indirectly to the top and bottom of the filter, for example using a fastening ring or ring that is firmly attached to the filter element.
  • the distance a between the turbulence body 13 and the outer wall of the filter is preferably at least half the largest turbulence body diameter and at most three times the largest turbulence body diameter in each case.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cyclones (AREA)

Abstract

L'invention concerne un ensemble filtre à la manière d'un séparateur centrifuge ou d'un filtre cyclonique comportant un boîtier de filtre à symétrie de rotation autour d'un axe longitudinal, ledit boîtier de filtre comprenant un élément filtrant agencé de manière centrée par rapport à l'axe longitudinal et conçu cylindrique creux, l'élément filtrant entourant un espace intérieur cylindrique de produit filtré et le boîtier de filtre délimitant conjointement avec l'élément filtrant un conduit d'écoulement annulaire en section transversale, ledit conduit d'écoulement comportant un espace de tourbillonnement, dans lequel débouche une entrée d'écoulement de manière excentrée et transversalement à l'axe longitudinal, ainsi qu'un conduit de séparation attenant et s'étendant le long de l'axe longitudinal indirectement ou directement par rapport à l'espace de tourbillonnement. L'invention se caractérise en ce qu'un certain nombre de corps de turbulence se présentant sous forme de barres sont agencés de manière circulaire autour de l'élément filtrant, lesdits corps de turbulence étant conçus comme des barres ou des tiges rondes, ovales ou polygonales en section transversale et leurs extensions longitudinales étant orientées dans chaque cas parallèlement à l'axe longitudinal de l'élément filtrant conçu cylindrique creux.
EP20715279.4A 2019-03-15 2020-03-11 Ensemble filtre à la manière d'un séparateur centrifuge doté d'un corps de turbulence Withdrawn EP3938073A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019203552.3A DE102019203552B4 (de) 2019-03-15 2019-03-15 Filteranordnung nach Art eines Fliehkraftabscheiders mit Turbulenzkörper und deren Verwendung
PCT/EP2020/056428 WO2020187653A1 (fr) 2019-03-15 2020-03-11 Ensemble filtre à la manière d'un séparateur centrifuge doté d'un corps de turbulence

Publications (1)

Publication Number Publication Date
EP3938073A1 true EP3938073A1 (fr) 2022-01-19

Family

ID=72241068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20715279.4A Withdrawn EP3938073A1 (fr) 2019-03-15 2020-03-11 Ensemble filtre à la manière d'un séparateur centrifuge doté d'un corps de turbulence

Country Status (2)

Country Link
EP (1) EP3938073A1 (fr)
DE (1) DE102019203552B4 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069116B (de) * 1952-09-24 1959-11-19 Nichols Engineering S. Research Corporation, New- York, N. Y. (V.St.A.) Verfahren und Vorrichtung zum Abscheiden von feste Stoffe enthaltenden Faserstoffaufschwemmungen an einem Hydrozyklon
DE6751147U (de) * 1968-09-20 1969-02-13 Voith Getriebe Kg Heidenheim Wirbelabscheider zum abscheiden von gas aus fluessigkeit
DE19811090A1 (de) * 1998-03-13 1999-09-16 Georg Klas Zyklonabscheider
DE19844441A1 (de) * 1998-09-28 2000-04-06 Lundin Filter Gmbh Vorrichtung und Verfahren zum Abtrennen von Teilchen aus einem Fluid
DE102006036943A1 (de) 2006-08-08 2008-02-14 Hydac Process Technology Gmbh Filtervorrichtung

Also Published As

Publication number Publication date
DE102019203552B4 (de) 2023-11-09
DE102019203552A1 (de) 2020-09-17

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