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WO1991010493A1 - Cartouche filtrante multifonctions a regulation de repartition d'ecoulement - Google Patents

Cartouche filtrante multifonctions a regulation de repartition d'ecoulement Download PDF

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Publication number
WO1991010493A1
WO1991010493A1 PCT/US1991/000304 US9100304W WO9110493A1 WO 1991010493 A1 WO1991010493 A1 WO 1991010493A1 US 9100304 W US9100304 W US 9100304W WO 9110493 A1 WO9110493 A1 WO 9110493A1
Authority
WO
WIPO (PCT)
Prior art keywords
set forth
filter
carbon body
axially
media bed
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.)
Ceased
Application number
PCT/US1991/000304
Other languages
English (en)
Inventor
Vue Z. Yang
Gary L. Hatch
Thomas D. Holler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ametek Inc
Original Assignee
Ametek Inc
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 Ametek Inc filed Critical Ametek Inc
Publication of WO1991010493A1 publication Critical patent/WO1991010493A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/04—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls
    • 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
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter 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
    • B01D29/31—Self-supporting filtering elements
    • B01D29/33—Self-supporting 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
    • B01D29/50—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 multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—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 multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—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 multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/02—Combinations of filters of different kinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/02—Column or bed processes
    • B01J47/022—Column or bed processes characterised by the construction of the column or container
    • B01J47/024—Column or bed processes characterised by the construction of the column or container where the ion-exchangers are in a removable cartridge
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/44—Special measures allowing the even or uniform distribution of fluid along the length of a conduit
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/006—Cartridges

Definitions

  • the present invention relates to a filter for removing dissolved solids and other contaminants from water and, more particularly, to a cartridge filter having either a single solid filter through which a balanced flow is attained or dual concentric filter media through which serial radial and axial flow is controlled and balanced by a flow distribution apparatus between the two filter media.
  • porous carbon filter blocks are formed in a long cylindrical shape with a hollow axial interior. Such a cylindrical filter block is placed in a suitable housing and raw water to be filtered is supplied in a manner to cause it to flow radially inwardly through the porous filter block to the hollow interior from which it is collected for use from one open end. It is also known to fill the hollow interior of the cylindrical block with another filter media in particulate form to provide supplemental filtration or water treatment.
  • U.S. Patent 3,289,847 shows a dual bed filter comprising a hollow cylindrical outer filter having its interior filled with a different typj of particulate filter material. Activated carbon and an ion exchange resin are disclosed for use in two concentric filter beds.
  • U.S. Patent 4,032,457 discloses a tubular cylindrical filter cartridge containing activated carbon in a bonded matrix. In one embodiment, the hollow interior of the cartridge may be filled with a particulate ion exchange resin.
  • U.S. Patent 3,375,933 shows a cylindrical tubular filter module comprising activated carbon particles encapsulated in a polymer resin matrix.
  • a similar filter module comprising a powdered ion exchange resin similarly bonded with a suitable polymer.
  • the use of a mixture of cation and anion exchange resins is also disclosed.
  • Resin-bonded powdered activated carbon filter blocks have gained widespread use in drinking water filter systems. Activated carbon is known to be effective for the removal of a wide range of dissolved and suspended solids, including metals and other dissolved minerals, colloidal and other suspended solids, dissolved gases, and even bacteria. As indicated, it is also known to combine other filter materials and media with porous activated carbon blocks to provide series filtration for materials which cannot be removed by the carbon or whose removal in a carbon filter is not particularly effective. For example, the interior of a hollow cylindrical carbon block filter may be filled with a wide variety of particulate filter media including minerals, resins or metals, in either finely divided or granular form. Mixtures of different types of filter media may also be utilized.
  • a porous carbon block filter formed with a hollow cylindrical body provides a relatively high filter capacity with a relatively small volume of filter material, and a corresponding low resistance to liquid flow through it.
  • a similar problem concerns the difficulty in obtaining uniform radial flow through the carbon block and subsequent maximized axial or column flow through the interior media bed.
  • one commonly used filter cartridge is adapted to be installed in a housing in which both the raw water inlet and the filtered water outlet are located in the cover for the housing.
  • the incoming water to short circuit and take the most direct route radially through the end of the carbon block immediately adjacent the inlet and then axially through only a short length of the media bed to the filtered water outlet.
  • Short circuiting of tne flow prevents the most effective use of the entire filter cartridge, particularly those portions at the opposite axial end remote from the inlet and/or outlet.
  • the above identified patent to Matchett recognizes this problem in a filter cartridge of the type having an inlet in one end and the outlet in the other end.
  • radial flow through a portion of the length of the outer tubular filter is substantially restricted or eliminated.
  • the problem of short circuiting becomes more acute in certain situations, such as those applications in which the interior media bed comprises an ion exchange resin, where sufficient residence time of the water is critically important to effect the desired ion exchange.
  • nonuniform flow distribution and short circuiting of the water not only results in inefficient use of the interior filter media bed, but may also substantially diminish the filtering or absorption capability of the carbon body.
  • hollow cylindrical filter bodies may also be constructed of materials such as ceramics, resin bonded cellulose, bonded fibers, and a variety of other bonded particulates.
  • the present invention is directed to a filter apparatus of the type using a cartridge comprising a cylindrical body of bonded activated carbon particles or other self-supporting medium having a hollow generally cylindrical interior which may be filled with another particulate filter media.
  • the cartridge is constructed to be positioned within an outer housing such that the liquid to be filtered flows radially through the carbon body from the outside to the open interior, into the interior particulate media bed if present, and then axially through the media bed or hollow interior to a filtered water outlet at one open end of the hollow cylindrical body.
  • a flow distribution means is disposed along the carbon body between the open outlet end and the opposite end to distribute the water or other fluid passing through the carbon body axially therealong to help eliminate short circuiting, distribute the flow uniformly through the filter body, and maximize the capacity of the filter body.
  • the flow distribution means includes means for better distributing and equalizing the radial flow through the carbon body along its full axial length.
  • the flow distribution means may specifically comprise a cylindrical tubular barrier which surrounds a portion of an interior media bed and extends axially from the open end of the cartridge and terminates in an opposite end portion which defines an open area adjacent the opposite end of the media bed remote from the cartridge opening.
  • the tubular barrier has an outer surface which is spaced from the cylindrical interior surface of the carbon body such that water flowing radially through the carbon filter body will flow axially along the surface of the tubular barrier and into the media bed via the open area at the opposite end.
  • the radial flow distributing means may comprise any suitable construction for the carbon body which provides a radial flow capacity that varies axially along the length of the body from a maximum adjacent the outlet end and along the tubular barrier to a minimum adjacent the remote end of the media bed. Suitable carbon body construction includes an axially varying density or wall thickness or a combination of both.
  • the tubular barrier comprises an impervious cylindrical sleeve having an opposite end portion which terminates spaced from the remote end of the media bed.
  • the tubular sleeve preferably has an axial length in excess of one-half the length of the filter cartridge.
  • the tubular barrier is eliminated. Short circuiting is minimized and balanced flow distribution is accomplished by varying the radial flow capacity through the carbon body axially along its length in a manner opposite the preferred embodiment, i.e. varying the radial flow capacity from a minimum adjacent the outlet end to a maximum adjacent the remote end of the media bed.
  • the axial variation in radial flow capacity counters the inherent tendency toward short circuiting, resulting in better balanced radial flow along the full length of the filter body.
  • the variation in flow may likewise be provided with a carbon body that has either an axially varying porosity or wall thickness or a combinaton thereof.
  • a pervious tubular member may be placed between the carbon body and the media bed (if present), which tubular member has a uniformly varying porosity along its length from a minimum adjacent the outlet to a maximum adjacent the remote end.
  • FIG. 1 is a sectional view showing the general arrangement of the filter cartridge of the present invention inside its housing.
  • FIG. 2 is an axial sectional view through the filter cartridge of the preferred embodiment of the present invention.
  • FIG. 3 is an enlarged detail of a portion of FIG. 2 showing the tubular flow distribution barrier at the interface between the carbon filter body and the particulate filter media.
  • FIG. 4 is a view similar to FIG. 2 showing a variation in the filter cartridge of the preferred embod ment.
  • FIG. 5 is an axial sectional view through the filter cartridge of an alternate embodiment.
  • FIG. 6 is a view similar to FIG. 5 showing a variation in the filter cartridge.
  • FIGS. 7-9 are schematic cross sectional views of rigid porous filter bodies constructed to provide balanced flow in accordance with the present invention.
  • a filter cartridge 10 of the present invention is a ⁇ apte ⁇ to be inserted into an enclosing filter housing 11 from which it may be removed and disposed of after reaching its effective life. It is understood, however, that a similar cartridge construction could be provided which is permanently sealed in a housing such that the entire unit is discarded after exhaustion.
  • the filter cartridge 10 is of composite construction and includes an outer body 12 of bonded activated carbon particles having an annular cylindrical outer wall 13 defining a generally cylindrical open interior 14 which is filled with a particulate filter media bed 15.
  • the particulate media bed may comprise any of a variety of filter media such as, for example, an ion exchange resin or a mixed bed of cation and anion exchange resins.
  • the filter cartridge 10 includes an outlet end cap 16 at one end and an enclosing end cap 17 at the opposite end.
  • An annular sealing ring 18 is seated in a suitable recess 20 on the outside face of the enclosing end cap 17 and, when the filter cartridge is inserted into the housing 11, the sealing ring 18 is engaged by an annular sealing edge 21 in the bottom wall of the housing.
  • the outlet end cap 16 includes a centrally disposed hub 22 which defines an axially extending outlet opening 23.
  • the outlet end cap 16 includes an integral end plate 24 having a flanged outer edge 25 adapted to fit snuggly over the end of the carbon body 12.
  • the central hub 22 in the outlet end cap 16 includes an annular groove 26 adapted to receive and hold an O-ring 27.
  • a cover 30 is threaded onto the housing.
  • the cover 30 includes a housing inlet 31 by which unfiltered raw water is directed to the filter cartridge 10 and a housing outlet 32 from which the filtered effluent water from the filter cartridge is directed for consumption or use.
  • the cover 30 includes a cylindrical opening 33 which slides over the O-ring 27 on the central hub 22 as the cover 30 is threaded onto the housing 11. Simultaneously, the annular sealing ring 18 on the enclosing end cap 17 is pressed into engagement with the sealing edge 21 in the bottom wall of the housing. Unfiltered water entering the housing via the housing inlet passes into the space between the housing wall and the outside surface of the carbon body 12.
  • the water then flows radially inwardly through the annular wall 13 of the carbon body, into the media bed 15 filling the hollow interior, and then axially through the media bed and through the filtered water outlet opening 23 in the end cap 16.
  • the foregoing construction is generally known in the art and, without the unique flow distribution apparatus of the present invention, a significant portion of the flow of water would tend to pass through the porous carbon body 12 closely adjacent the outlet end cap 16, through the region where the resistance to flow is less.
  • the result would be less flow of water through the portions of the carbon body more remote from the outlet end cap and, correspondingly, lower flow through the portion of the media bed 15 more remote from the outlet end.
  • simply diverting the flow of water to be filtered to the remote or bottom end of the media bed would shift the flow radially through the carbon body to that remote end and, as a result, an imbalance in radial flow along the entire axial length of the carbon body would remain.
  • flow distribution means comprises a combination of a carbon body 12 having a radial flow capacity which varies axially along the length of the body and a barrier device 34 positioned axially along a portion of the interface between the carbon body 12 and the particulate media bed 15 to divert at least a portion of the radial flow of water through that part of the carbon body nearer the outlet end axially toward the opposite end of the media bed 15 which is remote from the outlet end.
  • a barrier device 34 positioned axially along a portion of the interface between the carbon body 12 and the particulate media bed 15 to divert at least a portion of the radial flow of water through that part of the carbon body nearer the outlet end axially toward the opposite end of the media bed 15 which is remote from the outlet end.
  • the barrier device 34 preferably comprises a thin-walled cylindrical tubular sleeve 35 disposed between the carbon body 12 and the media bed 15 and extending from the outlet end cap 16 axially toward the enclosing end cap 17 on the opposite end of the cartridge.
  • the tubular sleeve 35 terminates in an axially inner end 36 which is spaced from the remote end of the media bed 15.
  • the tubular sleeve 35 has a length somewhat in excess of one-half the length of the cartridge 10, but substantially less than the overall length thereof.
  • the tubular sleeve 35 is impervious along its full length and has an outer surface which is spaced slightly from the interior cylindrical surface of the carbon body.
  • This small space 37 is preferably provided by interposing a thin layer of porous material, such as a polypropylene wrap 38, between the sleeve 35 and the interior of the carbon body.
  • the impervious tubular sleeve 35 would inhibit radial flow through the carbon body in the region along the sleeve, as compared to the open lower region extending from the end 36 of the sleeve to the lower end of the cartridge.
  • the carbon body 12 is constructed to provide a radial flow capacity which varies axially along its length from a maximum adjacent the outlet end of the cartridge to a minimum adjacent the remote end at the bottom of the cartridge.
  • the thickness of the wall 13 of the carbon body is uniform along its length, but the body is formed with a graduated or axially varying porosity which varies from a maximum porosity portion 45 at the inlet end to a minimum porosity portion 46 at the remote opposite end.
  • the relative lower density (and higher porosity) of the minimum density portion 45 results in a substantially more balanced and uniform distribution of the radial flow of water through the carbon body 12 along its full length.
  • the outer surface of the carbon body 12 is provided with an inner wrap of a relatively fine polyolyefin prefilter material 40 and an outer wrap of a more porous material such as a polypropylene wrap 41 similar to the interior polypropylene wrap 38, previously described.
  • the polypropylene wrap 38 on the ID of the cylindrical carbon body preferably extends the full length thereof. These wrappings provide a prefiltering of larger particles from water entering the carbon block and help prevent particles shed from the surface thereof from entering the water.
  • the inner polypropylene wrap 38 provides the necessary space 37 between tubular sleeve 35 and the interior of the carbon body 12.
  • the carbon body 47 of the cartridge shown in FIG. 4 is also provided with a radial flow capacity which varies axially along its length from a maximum at the outlet end to a minimum adjacent the remote end.
  • the carbon body 47 is provided with a uniform porosity, but includes a uniform taper along its interior wall 51 to define a minimum wall thickness portion 48 at the outlet end and a maximum wall thickness portion 50 at the opposite remote end.
  • the interior wall 51 departs from a true cylindrical shape and is frustoconical.
  • the thinner minimum wall thickness section 48 provides less resistance to flow than the opposite thicker end 50 and, therefore, would normally provide a region of preferential flow.
  • the FIG. 4 embodiment also utilizes the same barrier device 34 comprising the tubular sleeve 35.
  • the combination of the tubular sleeve 35 with the thinner upper wall section of the carbon body 47 tends to balance the radial flow through the carbon body making it substantially equal along its axial length.
  • the tubular sleeve diverts a significant portion of the radial flow to the remote end of the cartridge, thereby maximizing axial flow through and contact with the media bed 15.
  • FIGS. 5 and 6 show somewhat simplified versions of the filter cartridge of the present invention that are also constructed to provide a balanced flow, but are somewhat less effective than the preferred embodiments of FIGS. 2 and 4.
  • the overall construction of the embodiment shown in FIG. 5 is generally similar to the previous embodiments.
  • the flow distribution means is provided by the carbon body itself which is constructed with a radial flow capacity which varies axially along its length from a minimum adjacent the outlet end to a maximum adjacent the opposite remote end. It will be recognized that this orientation is exactly opposite that of the carbon body 47 in the FIG. 4 embodiment.
  • the carbon body 53 in FIG. 5 has an interior wall 54 which is frustoconical and converges toward the upper outlet end of the cartridge to define a minimum wall thickness end 55 at the lower end remote from the outlet and a maximum wall thickness end 56 at the upper end adajcent the outlet.
  • the minimum wall thickness end 55 provides substantially less resistant to the radial flow of water and will, therefore, tend to balance the short circuiting flow through the upper outlet end, resulting in a greater volume of water also passing axially through substantially the full length of the media bed 15 as well as a balance in the flow. Without the barrier device 34 of the preferred embodiment, there will be some unavoidable short circuiting of flow through the maximum wall thickness end 56 which flow then may not be exposed to adequate contact time with the corresponding short length of media bed 15, as previously discussed. However, this embodiment still provides a similar balance in radial flow through the carbon body 53 along its full length as in the previously described embodiments. When used in certain applications, the cartridge shown in FIG. 5 is believed to be particularly effective in providing full utilization of both filter media, as in the following example.
  • the flow through the lower minimum wall thickness end 55 of the carbon body 53 will result in the pores in that part of the body becoming filled with sediment and plugged first.
  • An increasing volume of radial flow through the body will progress axially toward the maximum wall thickness end 56 as the thinner opposite end regions become filled, thereby effectively utilizing the full axial length of the carbon body.
  • less length of media bed 15 is available to provide its separate filtering or removal function.
  • the carbon body could be utilized which is virtually identical to the carbon body 12 of the preferred FIG. 2 construction.
  • the variation in radial flow capacity through the carbon body which varies axially along its length from an outlet end minimum to a maximum at the opposite end may be provided with a carbon body having a graduated (axially varying) porosity and oriented just opposite the body 12 in FIG. 2.
  • the minimum porosity portion would be located adjacent the outlet and the maximum porosity portion adjacent the opposite remote end.
  • the flow characteristics of the carbon body would otherwise be the same as described with respect to the FIG. 5 embodiment.
  • FIG. 6 shows yet another variation in a flow distribution means comprising a single element.
  • the carbon body 57 is of completely conventional construction with a uniform cylindrical interior wall 58 and uniform porosity along its entire length.
  • a flow distribution tube 60 is disposed along the interface between the interior wall 58 of the carbon body and the media bed 15.
  • the tube 60 is provided with a uniformly varying porosity along its length which varies from a minimum adjacent the outlet end to a maximum adjacent the opposite lower end.
  • the larger radial flow capacity through the carbon body 57 nearer the lower remote end helps counter the inherent short circuiting of flow through the upper outlet end.
  • FIG. 5 shows yet another variation in a flow distribution means comprising a single element.
  • the axially varying porosity in the flow distribution tube 60 is provided by a series of holes which progress from a large diameter size 61 at the remote lower end of the carbon body and media bed to a small diameter size 62 adjacent the upper outlet end of the cartridge.
  • this embodiment of the flow distribution means also creates a better balance in flow through the carbon body 57, thereby maximizing effective use of the carbon filter and the media bed 15.
  • the upper small diameter holes 62 may be sized and spaced to substantially prevent any substantial radial flow through the carbon body in this region, but to allow continuously greater flow as the lower regions of the carbon body become increasingly clogged, as with entrained sediment or the like.
  • FIGS. 7-9 show schematic representations of filter bodies constructed to provide a balanced radial flow through the body along its full axial length.
  • Each of the filter bodies 63-65 may be made of resin- bonded activated carbon particles or of any other porous filter media which can -be formed into a substantially self-supporting body defining a cylindrical shape with a hollow interior. Further, the hollow interior portions 66-68, respectively, may be left open or filled with a particulate filter media or some other type of liquid treatment mechanism. Filter bodies 63 and 64 are intended to function in the same manner as the graduated porosity and tapered constructions 12 and 47 described with respect to the preferred embodiments of the invention.
  • the body 65 of the FIG. 9 filter incorporates a composite of the construction of the filter bodies of FIGS. 7 and 8 by utilizing both a graduated porosity and a tapered hollow interior 68. This is only one example of a composite construction which, with appropriate changes in media size, density of compaction and taper angle, could be provided with a construction opposite that shown, but still providing the desired balance in radial flow along the axial length of the body.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

Un filtre composite (10) du type cartouche, du genre utilisant un corps cylindrique creux en carbone aggloméré (12) ainsi qu'un lit intérieur rempli d'un milieu filtrant particulaire, est disposé à l'intérieur d'un logement (11) de sorte que de l'eau non filtrée à l'état brut passe radialement intérieurement à travers le corps de carbone (12) dans le lit intérieur puis axialement dans le lit du milieu, jusqu'à une sortie se trouvant dans une extrémité. Afin d'équilibrer l'écoulement radial d'eau dans le corps de carbone, et afin de maximiser le contact avec le lit de milieu particulaire, on a disposé un dispositif de répartition d'écoulement dans l'interface entre le corps de carbone (12) et le lit de milieu filtrant particulaire, afin de répartir une partie de l'écoulement vers l'extrémité du lit de milieu la plus éloignée de la sortie de la cartouche. Ainsi, on élimine les courts-circuits de l'eau passant dans le filtre, on équilibre l'écoulement radial passant dans le corps de carbone (12), et on force une partie substantielle de l'écoulement à suivre un chemin le portant dans la totalité de la longueur du lit de milieu particulaire. Selon le mode réalisation préféré, le dispositif de répartition d'écoulement comprend une combinaison d'un corps de carbone (12) représentant une capacité d'écoulement radial variant axialement sur sa longueur et d'un manchon tubulaire imperméable à paroi mince, lequel s'étend de l'extrémité de sortie du filtre jusqu'à une extrémité opposée espacée de l'extrémité fermée (17) dudit filtre. Le manchon de répartition d'écoulement est légèrement espacé de la surface intérieure du corps de carbone afin de ménager un chemin d'écoulement direct à l'eau sortant du corps de carbone jusque dans le lit de milieu se trouvant dans la région éloignée de la sortie du filtre. On peut varier la capacité d'écoulement radiale en façonnement de manière unique la section transversale du corps de carbone ou en produisant un corps d'une porosité graduée. On peut également obtenir l'équilibre de base ainsi que la régulation de la répartition de l'écoulement dans des corps construits de manière similaire, à l'aide de différents milieux de filtres, avec ou sans un lit intérieur de milieu particulaire.
PCT/US1991/000304 1990-01-16 1991-01-15 Cartouche filtrante multifonctions a regulation de repartition d'ecoulement Ceased WO1991010493A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46487290A 1990-01-16 1990-01-16
US464,872 1990-01-16

Publications (1)

Publication Number Publication Date
WO1991010493A1 true WO1991010493A1 (fr) 1991-07-25

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0554223A1 (fr) * 1992-01-29 1993-08-04 Domme, Isfried Procédé de préparation d'un dispositif de filtration et le dispositif de filtration préparé selon ledit procédé
WO1997013042A1 (fr) * 1995-10-03 1997-04-10 Poels, Johannus, Hermanus Appareil sanitaire pour l'eau comportant un appareil de filtrage des fibres et notamment des fibres d'amiante
RU2121976C1 (ru) * 1996-09-11 1998-11-20 Российский федеральный ядерный центр - Всероссийский научно-исследовательский институт технической связи Фильтр для очистки жидкости
WO2000058222A1 (fr) * 1999-03-29 2000-10-05 Pierre Jean Messier Cartouche de filtre a eau
WO2001010531A1 (fr) * 1999-04-30 2001-02-15 Philip Hambley Systeme collecteur de sortie de filtre destine au decolmatage et methode de mesure correspondante
US6797166B1 (en) 1999-04-30 2004-09-28 Newtech Filter Systems, Inc. Underdrain apparatus
WO2005002706A1 (fr) * 2003-07-01 2005-01-13 Blue Air Ab Dispositif de filtration d'eau
EP1935471A3 (fr) * 2006-12-15 2009-02-25 Atlas Filtri S.r.l. Dispositif pour traiter et filtrer l'eau
US7964099B2 (en) * 2008-10-22 2011-06-21 Te-Hsing Wang Water filtering device
EP3583992A1 (fr) * 2018-06-18 2019-12-25 Franke Technology and Trademark Ltd Insert de filtre pour une robinetterie d'écoulement d'eau pourvu de filtre à eau potable
RU2734973C1 (ru) * 2020-05-04 2020-10-26 Общество С Ограниченной Ответственностью "Аквафор" (Ооо "Аквафор") Фильтрующий модуль
CN112044166A (zh) * 2020-08-14 2020-12-08 安徽千一智能设备股份有限公司 一种多介质过滤器及其过滤方法

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US3384241A (en) * 1966-01-12 1968-05-21 Nefco Filter Corp Graduated dual density liquid filter element
US4032457A (en) * 1975-06-04 1977-06-28 Fibredyne, Inc. Plural stage filter cartridge wherein at least one stage comprises pulverized particulate material
US4187136A (en) * 1978-04-14 1980-02-05 Nelson Industries, Inc. Method of making a graduated density liquid filter element
DE3204022A1 (de) * 1982-02-05 1983-08-11 Joachim 7252 Weil der Stadt Wolf Filterpatrone
EP0316687A1 (fr) * 1987-11-06 1989-05-24 Knight, John B., Jr. Dispositif pour le traitement de l'eau

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384241A (en) * 1966-01-12 1968-05-21 Nefco Filter Corp Graduated dual density liquid filter element
US4032457A (en) * 1975-06-04 1977-06-28 Fibredyne, Inc. Plural stage filter cartridge wherein at least one stage comprises pulverized particulate material
US4187136A (en) * 1978-04-14 1980-02-05 Nelson Industries, Inc. Method of making a graduated density liquid filter element
DE3204022A1 (de) * 1982-02-05 1983-08-11 Joachim 7252 Weil der Stadt Wolf Filterpatrone
EP0316687A1 (fr) * 1987-11-06 1989-05-24 Knight, John B., Jr. Dispositif pour le traitement de l'eau

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0554223A1 (fr) * 1992-01-29 1993-08-04 Domme, Isfried Procédé de préparation d'un dispositif de filtration et le dispositif de filtration préparé selon ledit procédé
WO1997013042A1 (fr) * 1995-10-03 1997-04-10 Poels, Johannus, Hermanus Appareil sanitaire pour l'eau comportant un appareil de filtrage des fibres et notamment des fibres d'amiante
RU2121976C1 (ru) * 1996-09-11 1998-11-20 Российский федеральный ядерный центр - Всероссийский научно-исследовательский институт технической связи Фильтр для очистки жидкости
WO2000058222A1 (fr) * 1999-03-29 2000-10-05 Pierre Jean Messier Cartouche de filtre a eau
US7138056B2 (en) 1999-04-30 2006-11-21 Hambley David M Filter underdrain system for backwash flow and method for measuring same
WO2001010531A1 (fr) * 1999-04-30 2001-02-15 Philip Hambley Systeme collecteur de sortie de filtre destine au decolmatage et methode de mesure correspondante
US6797166B1 (en) 1999-04-30 2004-09-28 Newtech Filter Systems, Inc. Underdrain apparatus
US7323104B2 (en) 2003-07-01 2008-01-29 Blue Air Ab Water filtering device
WO2005002706A1 (fr) * 2003-07-01 2005-01-13 Blue Air Ab Dispositif de filtration d'eau
EP1935471A3 (fr) * 2006-12-15 2009-02-25 Atlas Filtri S.r.l. Dispositif pour traiter et filtrer l'eau
US7964099B2 (en) * 2008-10-22 2011-06-21 Te-Hsing Wang Water filtering device
EP3583992A1 (fr) * 2018-06-18 2019-12-25 Franke Technology and Trademark Ltd Insert de filtre pour une robinetterie d'écoulement d'eau pourvu de filtre à eau potable
RU2734973C1 (ru) * 2020-05-04 2020-10-26 Общество С Ограниченной Ответственностью "Аквафор" (Ооо "Аквафор") Фильтрующий модуль
WO2021225470A1 (fr) * 2020-05-04 2021-11-11 Общество С Ограниченной Ответственностью "Аквафор" (Ооо "Аквафор") Module de filtration
US20230218104A1 (en) * 2020-05-04 2023-07-13 Electrophor, Inc. Filter module
CN112044166A (zh) * 2020-08-14 2020-12-08 安徽千一智能设备股份有限公司 一种多介质过滤器及其过滤方法

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