WO2000028214A1 - Dispositif de pompage peristaltique de fluide et/ou de separation solides/liquide - Google Patents

Dispositif de pompage peristaltique de fluide et/ou de separation solides/liquide Download PDF

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Publication number
WO2000028214A1
WO2000028214A1 PCT/GB1999/003703 GB9903703W WO0028214A1 WO 2000028214 A1 WO2000028214 A1 WO 2000028214A1 GB 9903703 W GB9903703 W GB 9903703W WO 0028214 A1 WO0028214 A1 WO 0028214A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
casing
outlet
fluid
cage
Prior art date
Application number
PCT/GB1999/003703
Other languages
English (en)
Inventor
Keith Crane
David Arthur Hoare
Original Assignee
Albury Bourne 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
Priority claimed from GBGB9824456.9A external-priority patent/GB9824456D0/en
Priority claimed from GBGB9923111.0A external-priority patent/GB9923111D0/en
Priority claimed from GBGB9923343.9A external-priority patent/GB9923343D0/en
Application filed by Albury Bourne Limited filed Critical Albury Bourne Limited
Priority to AU10597/00A priority Critical patent/AU1059700A/en
Priority to EP99954167A priority patent/EP1129289A1/fr
Publication of WO2000028214A1 publication Critical patent/WO2000028214A1/fr
Priority to US09/849,384 priority patent/US20010055534A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F04B43/1292—Pumps specially adapted for several tubular flexible members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0009—Settling tanks making use of electricity or magnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/26—Filters with built-in pumps filters provided with a pump mounted in or on the casing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0072—Special features particularities of the flexible members of tubular flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing

Definitions

  • the present invention relates to an apparatus for and method of pumping fluids and more particularly, an apparatus for and method of separating liquids from solids in a mixture of liquids and solids.
  • the method and apparatus can be used for the processing of waste water or waste liquids carrying solids or particulate matter in any proportion.
  • the invention can be used for the dewatering of animal slurries, sewage slurries and for the treatment of liquid effluent from a vegetable washing plant, from a mushroom farm, or for the treatment of the liquid effluent from poultry packing plants, dairies, creameries and cheese making factories. It can also be used for treating industrial, municipal and commercial waste liquids, municipal sewage sludges, including digested and non-digested primary and secondary sludges, industrial sludges such as paper slurries and the like.
  • the invention can be used for the extraction of juices from citrus fruits and other fruit products, such as current and apple pulp, or even for separating the juice and fruit flesh from pips, stalk, branches and leaves during the harvesting of grapes, blackcurrants and the like.
  • the invention makes use of known peristaltic pumping principles.
  • a peristaltic pump is used to separate solids from liquids.
  • an external vacuum source is used to generate a reduced pressure within the peristaltic pumping chamber.
  • Alternative constructions of peristaltic pumping apparatus are disclosed in EP-A-0470333 and JP 61016282.
  • a peristaltic fluid pumping or sludge separation device similar to that of the present invention is disclosed.
  • at least two lay-flat tubes are entrained around a plurality of rollers supported on a roller cage and rotatable within a sealed casing.
  • One of the lay-flat tubes is used to generate a reduced pressure within the casing and the other tube is used for pumping a fluid mixture of liquids and solids.
  • the liquids are separated from the solids in this apparatus by using a composite lay-flat tube for the separation process, the composite lay-flat tube having a tapered filter tube therein through which the mixture to be separated is forced.
  • the present invention is an improvement over the apparatus and method disclosed in WO 96/31269.
  • peristaltic pumping apparatus comprising at least two flexible deformable tubes entrained around a cage, rotatable within a part arcuate casing and supporting a plurality of rollers which push fluid through the tubes by squeezing the tubes, a first one of the tubes having a first end held open to the interior of the casing and an opposite end connected to a first outlet from the casing, whereby, upon operation of the apparatus, a pressure (hereinafter called negative pressure) which is less than that surrounding the casing will be generated within the casing, a second one of the tubes being connected at one end to an inlet in the casing, adapted to be connected to a fluid to be pumped and its opposite end being connected to a second outlet therein, whereby upon operation of the apparatus, the negative pressure will cause the second tube to move from a flattened state to a tubular state, whereby the fluid will be pumped through the second tube to the outlet.
  • negative pressure hereinafter called negative pressure
  • Filtering means may be located at or adjacent the outlet end of the second tube so that as the fluid is pumped through the tube, solids will be separated from liquids within the fluid.
  • the filtering means may comprise a flexible sleeve, which may be formed of textile material, at the outlet end of the tube, one end of the sleeve being connected to the tube and the opposite end being connected to an outlet pipe of the filtering means, the sleeve being located within a casing having a liquid outlet therein through which filtered liquids can pass.
  • the sleeve may be of tapered construction so that its outlet end is of reduced cross-sectional area, relative to its inlet end.
  • an apparatus for separating solids from liquids in a mixture of solids and liquids comprising a closed casing having a side wall, at least part of which is arcuate, and a pair of spaced opposed end walls, connected by said part arcuate side wall, a cage rotatable within the casing, the cage having rollers spaced around its periphery, and a first resilient tube extending around the cage and located between the peripheries of the rollers and the internal surface of the arcuate side wall, one end of the first tube being connected to a first outlet in a wall of the casing and the opposite end of the tube being connected to means within the casing to hold open said end of the tube, there being a non-return valve located within, or at the outlet end of, the first tube, means to cause rotation of the cage such that air within the casing will be drawn into the held-open end of the tube and pumped along the tube in peristaltic manner to the outlet, the non-return valve preventing air from
  • said means may comprise means for generating an electrical or electrostatic charge, which causes separation of solids from liquid in the mixture, e.g. by causing flocculation of the solid.
  • both means to generate an electrical charge or an electrostatic charge and filtering means may be provided.
  • the filtering means may comprise a perforated tubular member secured to the outlet end of the further tube, the perforated member preferably being flexible and formed of textile material and preferably tapering from its inlet end to its outlet end, the outlet end being connected to an outlet pipe in a filter casing, and there being a liquid outlet in said casing for liquids separated from said mixture.
  • the filtering means may be a sieve-like filter sleeve located within said at least one further resiliently deformable tube, and incorporate at least two electrodes therein, or on the surface of the sleeve, and the other running centrally of the sleeve, ' each extending the full length of the sleeve.
  • a method of pumping peristaltically and a method of separating solids peristaltically from liquids in a mixture of solids and liquids including the steps of locating a pair of flexible tubes within a casing having an at least part arcuate side wall, entraining the tubes around a cage having a plurality of rollers supported thereon, whereupon the flexible tubes are located between some of the rollers and the part arcuate side wall, one of said tubes being an evacuating tube and the other being a pumping tube, connecting an inlet end of the evacuating tube to means to hold open that end of the tube and connecting the other end of the tube to a non-return valve in the wall of the casing, causing rotation of the cage within the casing to generate a reduced pressure, relative to external pressure, within the casing, and connecting an inlet end of the further tube to an inlet in the casing, which inlet is adapted to be connected to a mixture to be pumped, whereby the reduced pressure will
  • the cage supports a plurality of guide spools for the respective tubes.
  • the cage supports a plurality of shafts circumferentially spaced around the cage, alternate shafts being used to support the rollers and the guide spools for the tubes.
  • an evacuating tube is located within the casing between a pair of pumping tubes, and hence, on each guide spool shaft, three separate guide spools are provided, a central one being for the evacuating tube and located on either side thereof, there is a lateral guide spool for the respective pumping tube.
  • each roller for the tubes is divided into a central portion for the evacuating tube and spaced to either side thereof, a lateral portion for the respective pumping tube.
  • FIGURE 1 is a side elevation of one embodiment of a portable pump/separator
  • FIGURE 2 is a plan view of the pump/separator
  • FIGURE 3 is a front elevation of the pump/separator
  • FIGURE 4 is a scrap plan view looking in the direction of the arrow A in Figure 1,
  • FIGURE 5 is a vertical section, to an enlarged scale, of filtering means shown at F in Figure 1,
  • FIGURE 6 is a plan view looking in the direction of the arrow B in Figure 5
  • FIGURE 7 is a front elevation of the filtering means shown in Figures 5 and 6,
  • FIGURE 8 is a side elevation showing a rotor drum which is located within the casing of the pump/separator shown in Figures 1 to 4,
  • FIGURE 9 is a section on the line IX-IX shown in Figure 8,
  • FIGURE 10 is a section on the line X-X in Figure 8,
  • FIGURE 11 is a schematic view of an alternative embodiment of pumping and separating apparatus
  • FIGURE 12 is a section to an enlarged scale through a preferred construction of filter sleeve having electrodes incorporated therein,
  • FIGURE 13 is a schematic scrap view showing a rotor drum having one pumping tube entrained around it and connected to an inlet and an outlet,
  • FIGURE 14 is an enlarged scrap view showing the inlet of Figure 13 in greater detail
  • FIGURE 15 is a view similar to Figure 14 but showing the outlet of Figure 13 and
  • FIGURE 16 is a schematic view of a sludge charging tank.
  • the peristaltic pump/separator is a mobile version having a wheeled support chassis 1 carrying an electric motor 3 driving the pump which is shown generally at 5, generally in known manner.
  • the pump 5 has an overall casing 7 formed of sheet steel, having a part arcuate side wall 9 and a pair of end walls 11 , which are split as shown at 13 and support split bearing members 15 for a central drum shaft 17.
  • the casing 5 is braced by a stiffening frame 19.
  • the shaft 17 supports a drum 21 which is shown in greater detail in Figures 8 to 10.
  • the casing 5 has an upper cantilever portion 23 fitted with a removable inspection cover 24 and a lower cantilever portion 25 fitted with a removable inspection cover 26.
  • Projecting arms 27 extend outwardly from each side of the cantilever portion 23 to support two filter chambers 29, as shown in Figure 2.
  • two tube or hose coupling members 31 are provide for a pair of pumping tubes and a further tube or hose connector 33 for an evacuation tube (to be described hereinafter).
  • the ends of the coupling members 31 located outside the casing 5 are connected with proprietary coupling members to respective ones of the filter chambers 29, whereas a non-return valve 35 is mounted on the outer end of the connector 33.
  • the cantilever portion 25 supports two further hose coupling members 37 for the peristaltic pumping hoses (not shown).
  • an evacuation hose support member 39 Located internally of the casing 5 within the cantilever portion 25 is an evacuation hose support member 39. This is mounted on upstanding brackets supported on the base of the casing 5 and has an end open to the interior of the casing 5, as shown at 43.
  • the drum 21 has a drive shaft 17 rotatable in the bearing members 15, supported by the end walls of the casing 5 and supported on the drive shaft 17 towards respective ends thereof are two spaced support plates 45, having four arcuate side walls at the junctions of which are four mounting channels, each to accommodate a roller support shaft 49.
  • a slot 51 is provided to enable mounting plates fixed on either end of the support shaft 49 to be adjustably located in the channel 47 in known manner, using suitable fixing screws 53.
  • Located midway along each side wall of each drum support plate 45 is a further mounting channel 55 for a support shaft 56 for a plurality of tube guide spools 57 (see Figures 2 and 10).
  • the shafts 56 are located in their respective mounting channels 55 in the same manner as the shafts 49.
  • each of the roller support shafts 49 rotatably supports two pumping tube rollers 59 towards each end thereof, and a centrally located evacuation tube roller 61, each of the rollers 59 and 61 being provided with its own bearings and the respective rollers being separated from one another by suitable spacers 63.
  • the evacuation tube roller 61 is contoured so as to have a central region with a uniform diameter, but tapered end regions, as shown at 65.
  • each of the shafts 56 supports a centrally located guide spool 58 for the evacuation tube and, located to either side thereof, a guide spool 57 for the respective pumping tubes.
  • the two spools 57 for the pumping tubes are somewhat wider than that for the evacuation tube since in the preferred arrangement, the pumping tubes are of larger diameter than the evacuation tube.
  • Each of the spools is provided with its own bearing so as to be able to rotate freely on its respective support shaft 56.
  • An inlet end of a resiliently deformable evacuation tube or hose 71 is connected in fluid tight manner using a screw connector 73 to the hose support member 39 and the hose 71 is then entrained around respective ones of the rollers 61 and guides 58 of the drum 21 and its outlet end is then connected in fluid-tight manner to that end of the connector 33 located within the casing 5 by a screw connector 75.
  • an inlet end of a pumping hose or tube 77 is connected by a screw connector 79 to that end of each tube connector 39 located within the casing 5 and is then entrained around respective ones of the rollers 59 and guide spools 57, and its outlet end is then connected using a respective screw connector 81 to that end of the respective tube coupling member 31 located within the casing 5.
  • Tension in the respective hoses can be adjusted by adjusting the radial spacing of the shafts 49 and 56 from the shaft 17 of the drum 21.
  • the flexible tubes 71 and 77 may either be suitably reinforced, resiliently deformable, tubular hoses which when collapsed will spring back to their tubular form or alternatively, may be reinforced, lay-flat hosing, such as that used by fire brigades. It is preferred that the evacuation hose 71 be in the form of a lay-flat hose, and the chamfered lateral portion 65 of the roller 61 are provided so as not completely to squash the two lateral edge regions of the lay-flat hose during use.
  • the pump is operated by rotating the drum 21 clockwise. Such rotation will cause the evacuation tube 71, as each roller 61 rolls around the tube, to be squashed substantially completely flat so as to drive any air within the tube from the inlet end of the tube connected to the tube support member 39 around the tube and out of the outlet hose connector 33.
  • the presence of the member 39 will ensure that at no time is the inlet end of the evacuation tube 71 collapsed. Because the member 39 is located within the casing 5 which is a totally sealed casing, each time a roller passes over the evacuation tube, a little bit more air from within the casing will be evacuated therefrom, so that eventually, the pressure within the casing 5 will be reduced substantially from normal atmospheric pressure outside the casing.
  • the stiffening frame 19 for the casing is most important.
  • the rollers 61 are rolling over the evacuation tube 71, partially to evacuate the interior of the casing 5, so the two other rollers 59 will be rolling over the two pumping hoses 77.
  • the two pumping hoses will be fully inflated, i.e. completely tubular, except where they are engaged by the rollers 59 (because, of course, the interior of the pumping tubes 77 are in communication with the exterior of the casing 5 through there respective coupling members 31 and 37).
  • the passage of the rollers 59 around the pumping tube 77 within the casing will cause any fluid within the tubes 77 to be pushed around the tube 77 from their inlet ends, towards their outlet ends connected by the connectors 81 to the coupling members 31. This in turn will cause fluid to be drawn into the casing through the tube inlets 37 and fluid to be pumped out of the casing through the couplings 31. Because the pressure within the casing 5 is reduced relative to atmospheric pressure, the two pumping hoses 77 will always be caused to return to their fully tubular configuration, immediately after a roller 59 has rolled over the tube. Hence, using the peristaltic pumping principles described, the pump will generate a negative pressure within the casing and at the same time, cause fluid to be pumped through the casing, through the two pumping tubes 77.
  • each filter chamber 29 is generally trough-shaped (as shown in Figure 7) with there being a liquid outlet 85 in the bottom of the trough.
  • An inlet end of each filter chamber 29 is connected by a suitable screw connector 87 to a respective one of the hose coupling members 31, there being a suitable spigot 89 projecting inwardly into the interior of the chamber.
  • the chamber has an outlet pipe 91 for solids welded therein and during use, a suitable filter sleeve 93 which is preferably tapered, as shown in Figure 6, is connected, e.g. with Jubilee clips or the like, between the spigot 89 and the outlet pipe 91.
  • a clear inspection cover 97 is provided for each filter chamber 27 to enable users to inspect the filtering process and to enable users to see when the filter members 93 need to be changed.
  • FIG 11 shows an alternative construction of pumping and separating apparatus schematically, with sludge to be pumped and separated indicated generally at 101 and the pumping and separating apparatus, which is largely identical to that shown generally at 5 in Figure 1, shown at 105.
  • a negative pressure is created within the apparatus 105, as in the embodiment of Figure 1, only a single pumping tube 107 is illustrated which is entrained around some of the rollers of the drum 121.
  • the tube 107 is connected at an inlet end to the sludge 101 by an inlet pipe 103 and at its outlet end, the tube 107 is connected to an outlet pipe 109 which deposits the sludge in a settling tank 111.
  • a plurality of lengths of polypropylene twine 113 are entrained within the tube 107, one end of the polypropylene strands being anchored to the tube 107 at their inlet ends and the other ends being allowed to "stream" out of the outlet end of the tube 107.
  • Material other than polypropylene and which is also known to generate an electrostatic charge could be used as an alternative.
  • two electrodes 115 and 117 which act alternately as a cathode and an anode, are supported above the settling tank 111, which is earthed as shown at 119.
  • An AC current of low voltage e.g. about 12 volts, is supplied to the electrodes 115,117.
  • a proportion of the sludge being pumped from the apparatus 105 into the outlet line 109 is taken from the pipe 109 and into a further pipe 122, an outlet end of which discharges into a further tank 123.
  • the tank 123 has a semi-arcuate metallic screen 125 therein, the apertures in which are approximately 2 or 3 millimetres in diameter, and rotatable within the screen 125 are a plurality of paddles supported on an axis of rotation 127, each of the paddles extending across the full width of the screen 125 and being comprised of a plurality of polypropylene bristles 129 which contact the surface of the screen 125. These bristles impart further electrostatic charge to the sludge which exits from the tank 125 through an outlet pipe 131 for discharge into the settling tank 111.
  • FIG. 12 An alternative embodiment of pumping and separating apparatus is disclosed in Figures 12 to 15.
  • Figure 13 shows a pump 205 similar to the pump 5 of Figure 1 and having a drum 221 rotatable therein, similar to that shown in Figure 2 and Figures 8 to 10.
  • the pump 205 generates a negative pressure in the same manner as the pump of Figure 1, and it also has one or more pumping tubes 207 entrained around the drum 221.
  • the or each pumping tube 207 comprises a resiliently deformable external tube 209 within which a filter sleeve 211 is located.
  • each pumping tube 207 is connected at its inlet end to a coupling member 237 comprising an external cylindrical portion 239 which may be formed of metal and an internal cylindrical coupling spigot 241 which forms a fluid tight joint with the external portion 239 and has an inner end with which one end of the filter sleeve 211 is connected in known manner, and an outer end to which a hose leading from a supply of sludge 201 to be pumped is connected in fluid tight manner.
  • the coupling spigot 41 is formed of electrically insulating material.
  • the filter sleeve 211 is of generally circular cross section and diametrically opposed to each other, a pair of pockets are formed in the sleeve.
  • an electrode 215 is located, typically a copper tape, and internally of the sleeve 211, a further electrode 217 is located, this electrode 217 being surrounded by a permeable sleeve-like envelope 219 which protects the electrode 217.
  • the envelope 219 is manufactured from a liquid permeable electrically insulating material so as to prevent either of the electrodes 215 coming into contact with the electrode 217 when the filter sleeve 215 is collapsed during the peristaltic pumping operation.
  • the filter sleeve 211 must be in sealing engagement with the inner end of the spigot 241 and its two electrodes must be electrically connected to respective terminals 223, whereas the electrode 217 must be connected to a separate terminal 225.
  • the two terminals 223 are connected to a low voltage supply of AC electricity, e.g. of 12 volts.
  • the outlet end of the pumping tube 207 is connected to a coupling member 231 comprised of an external cylindrical collar 233, which may be formed of metal, and an internal spigot 235 sealingly engaged with the external collar 233 and formed of electrically insulating material.
  • the coupling member 231 has an outlet for liquid shown generally at 243 and an outlet for solids shown generally at 245.
  • the electrodes 211 are connected to terminals on the spigot 235 as is the electrode 217.
  • the filter sleeve 211 will maintain solids therein but allow liquids to pass therethrough. Because of the presence of the electrodes 215,217 located respectively externally of the sludge and internally of the sludge, which electrodes are fed with the low voltage AC current, so there will be an electric charge set up in the sludge as it passes through the filter sleeve 211, this charge tending to cause small solid particles in the sludge to be attracted to one another, thus causing these particles to flocculate, i.e. to form into larger particles which tend to separate out from the liquids in the sludge.
  • the filtering performance of the filter sleeve 211 is enhanced, thus causing liquids to be expressed from the sludge and passed from within to without the filter sleeve 11 as the sludge is pumped around the pump from the inlet coupling member 231 to the outlet coupling member 237.
  • the outlet coupling member 231 only solids will exit at 245 and relatively clean liquid will exit at 243.
  • a source of compressed air may be led to the inner end of the spigot 235 by an air line 247, extending internally of the spigot 235.
  • FIG 16 shows a modification at the inlet end of the pumping and separating apparatus.
  • the sludge 201 is passed through a charging tank 249.
  • the charging tank has two compartments 251 and 253 separated by a weir 255 which is removable.
  • a pair of closely spaced electrodes 257,259 are provided which are connected to a source of low voltage AC current, e.g. at 12 volts.
  • a plurality of aeration pipes 261 are provided, each having at spaced intervals along their length a plurality of outlet nozzles 263 through which gentle jets of compressed air may exit into the base of the chamber 253.
  • Located immediately above the air pipes 261 is at least one pair of rod-like electrodes 265, the electrodes of each pair being connected to a further source of low voltage AC electric current, e.g. of 12 volts. These electrodes impart further electrical charge to the sludge before it enters the filter tube, thus assisting in the separation of solids from the liquid in the sludge.
  • the present invention also extends to the filter sleeve described with reference to Figures 11 to 15, and to the charging tank described with reference to Figure 16.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un dispositif de pompage péristaltique (5) équipé d'une cage à rouleaux (59) espacés sur la circonférence de cette cage, laquelle tourne dans une enceinte. Au moins deux tubes flexibles s'étendent autour de la cage; un premier tube d'évacuation a une extrémité d'admission maintenue ouverte dans l'enceinte (43) et une extrémité opposée reliée à une première évacuation hors de l'enceinte (33); un second tube de pompage s'étend entre une admission dans l'enceinte (37), pour communiquer avec un liquide à pomper, et une seconde évacuation hors de l'enceinte (31). Ainsi, lorsque la cage est mise en rotation, par exemple via un moteur électrique, une pression négative apparaît dans l'enceinte (7) et le liquide est pompé par l'appareil. Si l'appareil doit être utilisé comme séparateur pour la séparation de solides en suspension dans le mélange à pomper/mélangés avec lui, un système de filtrage (29) peut être prévu à l'extrémité aval du tube de pompage à l'extérieur de l'enceinte ou dans le tube lui-même. Pour éviter le déplacement latéral des tubes et leur usure dans l'enceinte, plusieurs bobines de guidage (57) sont placées sur la périphérie de la cage, de préférence en alternance avec les rouleaux également placés sur la circonférence. Au lieu d'utiliser un système de filtrage, on peut recourir, pour la séparation solides/liquide du mélange, à une charge électrostatique intervenant dans le mélange, ou encore à une charge électrique, en employant pour cela des électrodes et un courant alternatif de faible tension.
PCT/GB1999/003703 1998-11-06 1999-11-08 Dispositif de pompage peristaltique de fluide et/ou de separation solides/liquide WO2000028214A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU10597/00A AU1059700A (en) 1998-11-06 1999-11-08 Peristaltic fluid pumping and/or separation apparatus
EP99954167A EP1129289A1 (fr) 1998-11-06 1999-11-08 Dispositif de pompage peristaltique de fluide et/ou de separation solides/liquide
US09/849,384 US20010055534A1 (en) 1998-11-06 2001-05-05 Fluid pumping and separation apparatus

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
GBGB9824456.9A GB9824456D0 (en) 1998-11-06 1998-11-06 Peristaltic fluid pumping and/or separation device
GB9824456.9 1998-11-06
GB9922399.2 1999-09-23
GBGB9922399.2A GB9922399D0 (en) 1998-11-06 1999-09-23 Mark III pump/seperator
GBGB9923111.0A GB9923111D0 (en) 1999-10-01 1999-10-01 Effluent treatment
GB9923111.0 1999-10-01
GBGB9923343.9A GB9923343D0 (en) 1999-10-05 1999-10-05 Treatment system
GB9923343.9 1999-10-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/849,384 Division US20010055534A1 (en) 1998-11-06 2001-05-05 Fluid pumping and separation apparatus

Publications (1)

Publication Number Publication Date
WO2000028214A1 true WO2000028214A1 (fr) 2000-05-18

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Application Number Title Priority Date Filing Date
PCT/GB1999/003703 WO2000028214A1 (fr) 1998-11-06 1999-11-08 Dispositif de pompage peristaltique de fluide et/ou de separation solides/liquide

Country Status (4)

Country Link
US (1) US20010055534A1 (fr)
EP (1) EP1129289A1 (fr)
AU (1) AU1059700A (fr)
WO (1) WO2000028214A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102188845A (zh) * 2010-03-03 2011-09-21 张民良 压榨装置的过滤元件
US8313885B2 (en) 2005-11-10 2012-11-20 Agfa Graphics Nv Lithographic printing plate precursor comprising bi-functional compounds

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CN102188846B (zh) * 2010-03-03 2013-09-11 张民良 用于压榨装置的设有多层透水板的过滤元件
CN114349158B (zh) * 2021-12-28 2023-08-25 广西南宁绿泽环保科技有限公司 一种稳固化循环填料制备方法和应用

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EP0794157A1 (fr) * 1996-03-05 1997-09-10 Ming Shing Lee Traitement des eaux par l'électroflottation et l'électrocoagulation

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US4043918A (en) * 1976-05-24 1977-08-23 Reed Irrigation Systems Self cleaning filter assembly with fluttering inner filter member
US4540350A (en) * 1983-06-03 1985-09-10 Manfred Streicher Stricture pump
EP0323117A2 (fr) * 1987-12-24 1989-07-05 Toray Industries, Inc. Filtre pour liquide et méthode de filtration d'un liquide
US5049048A (en) * 1988-08-12 1991-09-17 KWW Gesellschaft fur Verfahrenstechnik mbH Hose pump
US5249938A (en) * 1989-06-06 1993-10-05 Bellhouse Technology Limited Peristaltic pump
WO1996031269A1 (fr) * 1995-04-07 1996-10-10 Albury Bourne Ltd. Dispositif de pompage peristaltique de fluides et/ou separateur de boues
EP0794157A1 (fr) * 1996-03-05 1997-09-10 Ming Shing Lee Traitement des eaux par l'électroflottation et l'électrocoagulation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8313885B2 (en) 2005-11-10 2012-11-20 Agfa Graphics Nv Lithographic printing plate precursor comprising bi-functional compounds
CN102188845A (zh) * 2010-03-03 2011-09-21 张民良 压榨装置的过滤元件
CN102188845B (zh) * 2010-03-03 2013-10-16 张民良 压榨装置的过滤元件

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