EP3938073A1 - Filter assembly of the cyclone separator type with turbulence body - Google Patents
Filter assembly of the cyclone separator type with turbulence bodyInfo
- 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- Withdrawn
Links
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims description 33
- 239000000706 filtrate Substances 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000443 aerosol Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000000126 substance Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019203552.3A DE102019203552B4 (en) | 2019-03-15 | 2019-03-15 | Filter arrangement in the manner of a centrifugal separator with a turbulence body and its use |
PCT/EP2020/056428 WO2020187653A1 (en) | 2019-03-15 | 2020-03-11 | Filter assembly of the cyclone separator type with turbulence body |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3938073A1 true EP3938073A1 (en) | 2022-01-19 |
Family
ID=72241068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20715279.4A Withdrawn EP3938073A1 (en) | 2019-03-15 | 2020-03-11 | Filter assembly of the cyclone separator type with turbulence body |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3938073A1 (en) |
DE (1) | DE102019203552B4 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL181479C (en) | 1952-09-24 | |||
DE6751147U (en) | 1968-09-20 | 1969-02-13 | Voith Getriebe Kg Heidenheim | Vortex separator for separating gas from liquid |
DE19811090A1 (en) | 1998-03-13 | 1999-09-16 | Georg Klas | Cyclone separator for effluent household gray water |
DE19844441A1 (en) | 1998-09-28 | 2000-04-06 | Lundin Filter Gmbh | Device and method for separating particles from a fluid |
DE102006036943A1 (en) | 2006-08-08 | 2008-02-14 | Hydac Process Technology Gmbh | filter means |
-
2019
- 2019-03-15 DE DE102019203552.3A patent/DE102019203552B4/en active Active
-
2020
- 2020-03-11 EP EP20715279.4A patent/EP3938073A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE102019203552B4 (en) | 2023-11-09 |
DE102019203552A1 (en) | 2020-09-17 |
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