WO1999022844A1 - Separation de matieres particulaires solides d'ecoulements de fluides - Google Patents

Separation de matieres particulaires solides d'ecoulements de fluides Download PDF

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Publication number
WO1999022844A1
WO1999022844A1 PCT/GB1998/003258 GB9803258W WO9922844A1 WO 1999022844 A1 WO1999022844 A1 WO 1999022844A1 GB 9803258 W GB9803258 W GB 9803258W WO 9922844 A1 WO9922844 A1 WO 9922844A1
Authority
WO
WIPO (PCT)
Prior art keywords
barrier
fluid
fluid stream
stream
particles
Prior art date
Application number
PCT/GB1998/003258
Other languages
English (en)
Inventor
John Ernest Elsom Sharpe
Original Assignee
Btg International Limited
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 Btg International Limited filed Critical Btg International Limited
Priority to AU97534/98A priority Critical patent/AU9753498A/en
Priority to JP2000518768A priority patent/JP2001521811A/ja
Priority to CA002303491A priority patent/CA2303491A1/fr
Priority to EP98951575A priority patent/EP1027130A1/fr
Publication of WO1999022844A1 publication Critical patent/WO1999022844A1/fr

Links

Classifications

    • 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
    • B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/24—Hand-supported suction cleaners
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/102—Dust separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/52—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D33/56—Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/705—Filters with filtering elements which move during the filtering operation having feed or discharge devices with internal recirculation through the filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/0214—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters with filters comprising movable parts, e.g. rotating filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/0215—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters the filtering elements having the form of disks or plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2290/00—Movable parts or members in exhaust systems for other than for control purposes
    • F01N2290/02—Movable parts or members in exhaust systems for other than for control purposes with continuous rotary movement
    • F01N2290/04—Movable parts or members in exhaust systems for other than for control purposes with continuous rotary movement driven by exhaust gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • This invention relates to a method and device for separating particulate materials from fluid streams.
  • fluid in the context of the present invention includes both gaseous fluids and liquid fluids.
  • particulate material may be an undesirable constituent of a fluid stream and should therefore be removed before the fluid is introduced, for example, into engines and machinery or into industrial processes, or into the environment, whether it be the environment at large or a closed environment such as an office building.
  • Separation applications involving the use of liquids as a fluid include, for example, sand dredgers and the disposal of liquid waste.
  • a method of separating particulate material from a fluid stream which method comprises rotating in the fluid stream a perforated barrier which permits the fluid to pass through it, the axis of rotation of the barrier projecting into the fluid stream, and the front of the perforated barrier being substantially normal to the streamlines in a major part of the incoming flow at the points where the flow meets the barrier, particles colliding with the barrier being in consequence imparted with kinetic energy in a tangential direction so that they tr'avel towards the periphery of the perforated barrier entrained in a diverted portion of the fluid stream.
  • the said diverted portion of the fluid stream is guided to a place where it is separate from the vicinity of the rotating front surface of the perforated barrier so that separated particles in the said diverted portion of the stream are not caught up in the fluid stream which is approaching the rotating barrier.
  • a portion of the fluid stream which has passed through the perforated barrier is fed back around the barrier to join the diverted portion of the fluid stream containing the entrained separated particulate material.
  • the invention further provides a device for separating particulate material from a fluid stream, which device comprises:
  • a duct for conveying a fluid stream containing entrained particulate material
  • a perforated barrier which is mounted for rotation in the duct about an axis which projects into the fluid flow, said perforated barrier permitting fluid flow through it, the front of the barrier being arranged in the duct so that it is substantially normal to the streamlines in a major part of the incoming flow at the points where the flow meets the barrier;
  • the device further ' comprises a means for guiding a diverted portion of the fluid stream which contains particles which have collided with the front of the barrier and in consequence have been imparted with kinetic energy in a tangential direction by the rotation of the barrier, so that said particles are entrained in said diverted portion of the fluid stream at the periphery of said surface; said guiding means being arranged to guide said diverted portion of the stream to a place separate from the vicinity of the rotating front surface of the barrier so that separated particles in said diverted portion of the stream are not caught up in the fluid stream which is approaching the rotating barrier.
  • incoming flow By major part of the incoming flow is meant more than 50% by volume of the incoming flow.
  • One of the essential features of the present invention is that the separation of the particulate material is due not only to the limited size of openings in the rotating barrier but also to particles colliding with the rotating barrier and in consequence being imparted with kinetic energy in a tangential direction as the fluid stream meets the front of the rotating barrier.
  • the present invention combines the conventional filtration technique of using a barrier containing apertures through which only particles of a certain maximum size may pass, with a technique in which rotational kinetic energy given to the barrier is transferred to particles in the fluid stream so that the particles together with a part of the fluid, perhaps 5% to 10%, are given sufficient kinetic energy in the direction of rotation of the barrier to thus be driven outward from the axis of rotation of the barrier towards the circumference of the perforated part of the barrier so as to separate them from the main fluid stream, perhaps 90% to 95% of the original stream, which passes through the barrier together with the remainder of very small particles which are able to pass through the perforations in the barrier.
  • the present invention combines conventional barrier filtration with the use of an imposed tangential force to produce a relative separation of particulate material from a fluid in a controlled manner.
  • the barrier in order to arrange for the fluid stream containing the particulate matter to meet the front of the rotating barrier normally the barrier will usually be rotated in a plane normal to the fluid stream, although this is not absolutely essential.
  • the particulate material which is to be separated by the method and device of this invention will usually be solid particulate material.
  • the particles will perhaps, for example, have a relatively high liquid content and may be capable of description as say semi-solid or some other description which might not strictly be regarded as a solid but which nevertheless is particulate material which is able to be separated by the method and device of the invention.
  • the perforated barrier may be made like a conventional filter, for example of porous metal, sintered metal, porous ceramic material, woven or non- woven fibres, fibre bundles, tube bundles or any other conventional filter material.
  • a conventional filter for example of porous metal, sintered metal, porous ceramic material, woven or non- woven fibres, fibre bundles, tube bundles or any other conventional filter material.
  • the perforated barrier it is not essential that the perforated barrier be of such construction, as long as it permits fluid flow through it.
  • the rotating perforated barrier could be in the form of a multi-spoked or ulti-bladed wheel, a fundamental requirement of the rotating perforated barrier being that it has sufficient surface area facing the fluid stream in order to strike a high proportion of the solid particles conveyed in the stream and thus cause them to be carried by tangential force radially away from the perforated front surface of the barrier and thus to physically separate them from the main fluid flow which passes through the body. It will be seen that this mechanism allows the passageways through the barrier to remain unblocked.
  • the size of the passageways or pores through the barrier are of course relevant to the size of the particulate material which can be separated.
  • the pore size can be for example 100 m ⁇ and surprisingly using the method of the invention about 98% of particles 5 m ⁇ size are separated, that is a pore to particle size ratio of 20 to 1.
  • the present invention able to substantially remove much smaller particles than the fineness of the filter would indicate but this enables a coarser filter to be used which is also maintained in a clean and efficient state for a much longer period of time by using the method of the invention.
  • Another advantage of the present invention is that the area of filter material which is required is much smaller than in prior devices due to the structure and method of use of the device.
  • the present invention is particularly suitable for removing particles in size ranges including about 2.5 ⁇ m which have in the past been a problem in causing clogging of conventional filters.
  • One feature of the operation of ' the invention is that particulate material in the stream which meets the rotating barrier at its axis of rotation will not tend to be driven outwards, at least immediately, because of the low tangential kinetic and centrifugal forces at this point and it tends to build up to a small hyperbolic mound. This can be avoided by blanking off the surface of porous material at the axial point of the rotating body, for example preferably with paint or varnish.
  • the actual structure of the perforated barrier may be such that it contains porous material only in its central area, and the periphery may be of any suitable material and may serve as a container for the porous material.
  • a preferred shape for the barrier is a disc which may have a flat or curved face, and may be convex, conical, ovoid, dome, or bullet-shaped or any other suitable shape which permits the separated particulate material to be hit clear of the face of the barrier and preferably guided so that it does not become caught up in or interfere with fresh incoming fluid to prevent it from passing through the barrier.
  • the rotating perforated barrier is not necessarily in the form of a conventional filter, for the sake of convenience the barrier will be referred to hereafter in this description as a filter.
  • the means for causing rotation of the filter also includes means for inducing the' flow of the fluid stream.
  • the filter is formed integrally with or joined to, for example, the impeller of a turbo machine or other arrangement in the fluid duct in order to induce fluid flow, which can be positioned either in front of or to the rear of the filter in respect of the fluid flow.
  • the power means for giving rotation may conveniently be an electric motor but in the application of the present invention for example to engines, chemical plant or other processes other motive power may be available which may be more convenient or economic to use.
  • the diverted portion of the flow with the separated particles still entrained therein may be introduced into a chemical or physical process for transforming the particles.
  • two or more of the separation steps of the invention may be arranged in cascade in order to provide yet finer separation.
  • an important and very useful application of the present invention is in the field of removal of waste particulate materials which are at present handled by various forms of vacuum cleaning technique. It will be seen that the present invention offers a way of improving such techniques by substituting a rotating perforated barrier of the invention for the conventional filters used in such equipment and in many cases the change of design in relation to existing equipment is relatively minor but confers considerable benefits.
  • Such existing equipment already incorporates appropriate motive power, usually in the form of an electric motor, coupled to some form of impeller to induce the fluid flow, as well as having a collection means for separated particulate waste.
  • a rotating fluid- permeable perforated barrier of the invention needs therefore only to be coupled to the impeller of the device in the duct for the fluid stream and the existing static filter removed, in order to make use of the present invention.
  • a conventional electric battery-powered hand-held vacuum cleaner type device such as of the "Dustbuster” (Trade Mark) type which is itself a very efficient device of its kind, can be adapted as mentioned above to use the present invention.
  • Dustbuster Trade Mark
  • a specific adaptation of this device is described hereinafter.
  • vacuum cleaner which are designed for higher volumes of particulate waste include the so-called bucket or cylinder type whose common features comprise a cylinder or other container which incorporates an air inlet to which a collector hose is attached and an electrically powered impeller having in front of it one or more conventional filters being arranged to catch the particulate waste, at least one of said filters often being in the form of a porous bag.
  • a variation of the bucket vacuum cleaner is a carpet shampooer.
  • carpet shampooer In this type of cleaner it is arranged for carpet shampoo to be sprayed onto the carpet from near, the end of the collector hose.
  • the hose conducts solid particulate waste in an airstream which contains liquid back to the container.
  • a conventional "thrower" device can be fitted on the front of the rotatable filter.
  • the thrower is a solid disc which, as the name implies, rotates and throws liquid particles which are present in the gaseous stream to the side thus reducing or eliminating the amount of liquid which reaches the filter itself and which may cause possible blockage problems when mixed with the particulate material. It will be understood that there are other apparatus in which it may be desirable to introduce a liquid into the main gaseous fluid stream and in such situations it may or may not be necessary or desirable to incorporate a thrower device before the rotating filter.
  • An additional or alternative feature which may be included in such vacuum cleaning equipment is a pre- shredder, in other words a rotating blade arrangement fitted on the front of the rotating filter body which can cause some size reduction in the particulate waste before it reaches the filter face itself and thus make the particulate material more manageable.
  • the vacuum cleaner is the garden vacuum cleaner which is used to remove leaves and other garden debris.
  • a cleaner can use the device of the invention in a similar manner as described before but optionally with a useful variation in that the main stream of air produced by the impeller can be ducted to a point near the inlet of the collecting hose in order to dislodge debris which is then sucked into the collecting hose.
  • Liquid such as water or other treatments, either fluids or particulate matter, can if desired by introduced into the pressurized air stream. It will be seen that this kind of arrangement can also be used in a carpet shampooer so that water or carpet shampoo solution is introduced into the high pressure stream in order to carry the shampoo deep into the carpet pile.
  • the device of the invention can be applied to the removal of particles from the exhaust gases of combustion engines and other processes. It will be apparent from the previous description that this may be done by carrying the diverted portion of the fluid stream, in this case the gaseous exhaust containing a significant proportion of carbon-based particles, to a separate receptacle where they can be removed by conventional means, for example, by gravity or centrifugal force. However, this diverted stream containing the carbon particles may also be added to the inlet air of the engine so that the particles are combusted or otherwise processed by chemical or physical reaction.
  • the device of the invention can be employed in any chemical or industrial process or equipment in which particulate material needs to be separated from a fluid and in which the techniques previously mentioned can be used, for example separation of the particles from the diverted stream, recycling of the diverted stream to the main stream and removal of pollutant particles from exhaust gases and liquids, including air and liquid conditioning equipment, and reacting them subsequently to render them innocuous.
  • Figure 1 is a diagrammatic representation in section of the operation of the device of the invention
  • FIG. 2 is a diagrammatic representation in section of the device of Figure 1 in which the filter incorporates an integral axial turbo machine for producing fluid flow;
  • Figure 3 is a diagrammatic representation in section for the device of Figure 1 in which the filter incorporates a centrifugal turbo machine for producing fluid flow;
  • Figure 4 is a diagrammatic representation in section of a device similar to that of Figure 3 showing in more detail the recovery of particulate matter and recirculation of diverted fluid, including the fluid flows and particular points in the system which are referred to in Figure 5;
  • Figure 5 is a Mollier diagram of the device of
  • Figure 6 is a diagrammatic representation, partially in section, of a hand-held vacuum cleaner incorporating the device of the invention.
  • the particle laden fluid 12 approaches the rotating filter disc 1 where particles 2 unable to pass with the fluid stream 3 are thrown off the rotating disc 1 by ta'ngential forces as shown by the direction arrow.
  • the flow of fluid through the rotating filter is created by the application of a differential pressure (p 1 - p°) which may be provided by any suitable means.
  • Suitable means for providing a differential pressure across the rotating filter 1 may themselves rotate providing a suitable and integrated drive means for the disc 1.
  • Figures 2 and 3 show two suitable turbo-machinery means, Figure 2 an axial machine and Figure 3 a radial or centrifugal machine. In both cases the disc is rotated directly by the machine and forms an integral part of the rotor 4 for the axial machine and rotor 5 for the radial or centrifugal machine, respectively.
  • the operation of the rotating filter disc 1 is as previously described with the fluid 3 passing through the filter 1 and the blading of the rotors 4 and 5 respectively being clean of particulate matter 2; the filter disc also remaining clean.
  • dirty fluid 12 containing particles 2 enters a duct 14 at point A induced by the action of the centrifugal machine impeller 5.
  • This fluid is drawn through duct 14 onto the face of the rotating filter disc 1.
  • Clean fluid 3 is drawn by centrifugal action in rotor 5 through the rotating filter 1 to be exhausted into a suitable duct 11 at point E.
  • Particles 2 striking the rotating filter 1 are thrown off as described above to be carried by the diverted fluid flow 6 induced by the action of the shrouded rotating disc 1 to point F in a suitable volute duct formed with the shroud 7.
  • From F the fluid and particles pass to G in a suitable container where with lower fluid velocity a proportion of the particles 13 settle out for example under the influence of gravity.
  • the partially cleaned fluid 15 passes through duct 9 to rejoin the main stream 12 at H.
  • the precise configuration of the rotating disc is dependent on the detailed flow conditions and geometry of the main dirty flow 12 and the cleaned flow 3 which are themselves dependent on the particular application.
  • FIG. 6 shows partially diagrammatically a handheld vacuum cleaner which incorporates a device according to the present invention.
  • This vacuum cleaner is in fact an adaptation of the well-known "Dustbuster” (Trade Mark) type of hand-held vacuum cleaner which has been modified in the manner described earlier.
  • Dustbuster Trade Mark
  • the cleaner comprises a main portion (21) and a detachable nozzle portion (22) which exteriorly comprise two housings of moulded plastic material.
  • the main portion (21) houses an electric motor (23) which has switch means (not shown) .
  • the electric motor is powered by rechargeable batteries (24) and drives an impeller (25) which is integral with funnel- shaped conduit (26) at the front of which is fitted a dome-shaped perforated barrier of metal mesh (27) .
  • the housing (21) has exhaust vents (28) on each side to carry away the main stream of air produced by the impeller. Additionally, however, there is a circumferential gap (29) between the circumferential neck of the funnel-shaped conduit (26) and the impeller (25) , and the wall of the main housing (21) which faces the nozzle portion (22) . A function of this gap is to permit a portion of the airstream which has passed through the perforated barrier and the impeller to be fed back around the barrier to join the diverted portion of airstream containing the entrained separated particulate material.
  • the detachable nozzle portion (22) has a nozzle (31) which leads into an internal conduit (32) for conveying air with particulate material entrained therein.
  • the presence of the internal conduit (32) provides an annular space (33) in which separated particulate material can collect.
  • the device shown in Figure 6 operates in much the same way as the device shown at the right hand side of Figure 4 as described previously, except that instead of the diverted portion of the fluid stream containing separated particles being conducted by means of a shroud and a duct to a solute duct and/or a separate container for the particles, in the device of Figure 6 the diverted stream is contained within the detachable nozzle portion (22) and the particles can collect in the annular space (33) .
  • the nozzle portion (22) contains a substantial amount of particulate material it can be detached from the main portion (21) , shaken or otherwise treated to remove particles from the nozzle portion and then re-fitted to the main portion of the cleaner for re-use.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cyclones (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Centrifugal Separators (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

L'invention concerne un procédé servant à séparer des matières particulaires d'un écoulement de fluide, qui comporte l'étape consistant à faire tourner dans l'écoulement (10) de fluide une barrière (1) perforée qui permet au fluide de passer à travers elle; l'axe de rotation de la barrière s'étend dans l'écoulement de fluide, et la surface antérieure de la barrière perforée est sensiblement perpendiculaire aux lignes d'écoulement d'une majeure partie du flux entrant aux points de rencontre du flux et de la barrière. De l'énergie cinétique est par conséquent communiquée aux particules (2) entrant en collision avec la barrière dans un sens tangentiel, de sorte qu'elles se déplacent en direction de la périphérie de la barrière perforée, entraînées dans une partie de dérivation de l'écoulement (6) de fluide.
PCT/GB1998/003258 1997-11-01 1998-11-02 Separation de matieres particulaires solides d'ecoulements de fluides WO1999022844A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU97534/98A AU9753498A (en) 1997-11-01 1998-11-02 Separation of solid particulate materials from fluid streams
JP2000518768A JP2001521811A (ja) 1997-11-01 1998-11-02 粒状固形物を流体流れから分離するための方法及び装置
CA002303491A CA2303491A1 (fr) 1997-11-01 1998-11-02 Separation de matieres particulaires solides d'ecoulements de fluides
EP98951575A EP1027130A1 (fr) 1997-11-01 1998-11-02 Separation de matieres particulaires solides d'ecoulements de fluides

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9723029.6 1997-11-01
GBGB9723029.6A GB9723029D0 (en) 1997-11-01 1997-11-01 Improvements to fluid filtration

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US09508060 A-371-Of-International 2000-03-07
US10/347,598 Continuation US20030106858A1 (en) 1997-11-01 2003-01-22 Separation of solid particulate materials from fluid streams

Publications (1)

Publication Number Publication Date
WO1999022844A1 true WO1999022844A1 (fr) 1999-05-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/003258 WO1999022844A1 (fr) 1997-11-01 1998-11-02 Separation de matieres particulaires solides d'ecoulements de fluides

Country Status (7)

Country Link
EP (1) EP1027130A1 (fr)
JP (1) JP2001521811A (fr)
CN (1) CN1278745A (fr)
AU (1) AU9753498A (fr)
CA (1) CA2303491A1 (fr)
GB (1) GB9723029D0 (fr)
WO (1) WO1999022844A1 (fr)

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WO2004100751A1 (fr) * 2003-05-15 2004-11-25 BSH Bosch und Siemens Hausgeräte GmbH Appareil de nettoyage, en particulier aspirateur, comprenant un dispositif filtrant ceramique
WO2006051161A1 (fr) * 2004-11-11 2006-05-18 Valtion Teknillinen Tutkimuskeskus Appareil de filtrage
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GB2565355A (en) * 2017-08-11 2019-02-13 Dyson Technology Ltd Dirt separator for a vacuum cleaner
GB2565362A (en) * 2017-08-11 2019-02-13 Dyson Technology Ltd Dirt separator for a vacuum cleaner
GB2565365A (en) * 2017-08-11 2019-02-13 Dyson Technology Ltd Handheld vacuum cleaner
GB2565359A (en) * 2017-08-11 2019-02-13 Dyson Technology Ltd Dirt separator for a vacuum cleaner
GB2565360A (en) * 2017-08-11 2019-02-13 Dyson Technology Ltd Dirt separator for a vacuum cleaner
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AU9753498A (en) 1999-05-24
JP2001521811A (ja) 2001-11-13
GB9723029D0 (en) 1998-01-07
EP1027130A1 (fr) 2000-08-16
CA2303491A1 (fr) 1999-05-14
CN1278745A (zh) 2001-01-03

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