GB2256599A - Filter with rotary washing arms - Google Patents

Filter with rotary washing arms Download PDF

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Publication number
GB2256599A
GB2256599A GB9210714A GB9210714A GB2256599A GB 2256599 A GB2256599 A GB 2256599A GB 9210714 A GB9210714 A GB 9210714A GB 9210714 A GB9210714 A GB 9210714A GB 2256599 A GB2256599 A GB 2256599A
Authority
GB
United Kingdom
Prior art keywords
filter
side wall
screen
filter according
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9210714A
Other versions
GB9210714D0 (en
Inventor
Philip Jackson
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.)
E Beaudrey et Cie SA
Original Assignee
E Beaudrey et Cie SA
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 E Beaudrey et Cie SA filed Critical E Beaudrey et Cie SA
Publication of GB9210714D0 publication Critical patent/GB9210714D0/en
Publication of GB2256599A publication Critical patent/GB2256599A/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11Filters 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
    • B01D29/114Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B01D29/115Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/44Edge filtering elements, i.e. using contiguous impervious surfaces
    • B01D29/445Bar screens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62Regenerating the filter material in the filter
    • B01D29/66Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/682Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a rotary movement with respect to the filtering element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/76Handling the filter cake in the filter for purposes other than for regenerating
    • B01D29/86Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/885Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices with internal recirculation through the filtering element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/92Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
    • B01D29/925Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate containing liquid displacement elements or cores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
    • B01D29/945Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2201/00Details relating to filtering apparatus
    • B01D2201/58Power supply means for regenerating the filter
    • B01D2201/583Power supply means for regenerating the filter using the kinetic energy of the fluid circulating in the filtering device

Description

1 -, ', 65 110 1) Filter with rotatinq wash manifold The present invention
is generally concerned with filters comprising a body which has an inlet and an outlet and the side wll at least of which is in the shape of a body of revolution, a fixed screen coaxial with and inside the body and whose side wall at least is a filter wall disposed between the inlet and the outlet of the body and is also in the shape of a body of revolution, and at least one washing ramp extending along a generatrix of the screen and rotatably mounted inside the screen.
Filters of this type are designed to be inserted axially under pressure into a pipe to eliminate impurities, detritus and other debris of small and medium size that may be carried by the flow in the pipe.
One problem for designers of filters of this type is the need to remove debris retained by the filter wall of the screen to prevent the latter clogging.
If no specific arrangements are made otherwise, the water jets from the washing ramp merely lift deposited debris from the filter wall temporarily before it returns thereto.
In some known designs the filter wall of the screen is generally cylindrical. and the body is periodically flushed to discharge debris on it.
Because the debris is distributed throughout the body, the effectiveness of any such flushing is limited, however.
In other known designs the filter wall of the screen is generally frustoconical and -the flushing is applied to an evacuation pipe opening axially in the vicinity of its smaller diameter end.
As previously, this flushing is of limited effectiveness, only some of the retained debris reaching A_ 2 the pipe provided for evacuating it.
An object of the present invention is a filter which has the advantage of enabling these problems to be circumvented and which provides other advantages.
The present invention provides a filter comprising a body having an inlet and an outlet and whose side wall at least is in the shape of a body of revolution, a fixed screen disposed coaxially inside said body and whose side wall at least is a filter wall disposed between an inlet and an outlet of said body and is also in the shape of a body of revolution, and at least one wash manifold rotatably mounted in said screen extending along a generatrix thereof, wherein over part at least of its length the side wall of the body is generally oblique to the side wall of the screen, converging towards the latter in the direction from the inlet of the body to its outlet, and there is provided at the same end of the side wall of the screen as the outlet of the body an annular collection space adapted to receive debris conveyed by the flow to be treated and connected to an evacuation pipe.
For reasons of simplicity, the side wall of the body is generally frustoconical and that of the screen is generally cylindrical, for example.
Because the side wall of the body is obliquely disposed to that of the screen, the velocity vector in the annular space of the incoming flow to be treated is itself oblique to the side wall of the screen with the result that this velocity vector has a component parallel to the axis of the system which distributes the flow over all of the side wall of the screen and conveys debris in the flow towards the collection space and a transverse component causing the flow to pass through the side wall of the screen.
In other words, because of this oblique 1 3 disposition, the treated flow is guided optimally along all of the side wall of the screen and is distributed optimally along the latter to pass through it.
It is preferably designed so that, given the flow cross-section provided, the modulus of the flow vector of the incoming flow to be treated remains substantially constant along all of the side wall of the screen.
Due only to this velocity vector, a significant proportion of the entrained debris is systematically conveyed towards the collection space provided at the end of the side wall of the screen.
On each rotation of the wash manifold the remaining debris deposited on the side wall of the screen is removed from the side wall of the screen by the wash water and returned into suspension in the incoming flow, as it were, and is then entrained a little further downstream by the flow until it is again deposited on the side wall of the screen.
The debris therefore eventually reaches the collection space provided at the end of the side wall of the screen.
Continuous drainage at a very low flowrate and/or periodic flushing at a high flowrate are sufficient to evacuate the debris reaching the collection space.
To improve the efficiency of this process, at least one nozzle is preferably provided discharging obliquely into the collection space to induce therein rotation about the axis of the system.
The debris present in the collection space is therefore systematically kept in motion, without being able to collect and settle in any part thereof.
At least one vane at ieast in part oblique to the axis of the system is preferably fastened to the wash manifold to rotate the manifold.
Rotation is usually obtained by means of jets 4 issuing obliquely from the wash manifold itself.
Apart from the fact that such jets consume energy., the rotation torque they are capable of generating is still relatively weak and the resulting rotation speed is usually difficult to control.
The vane(s), which may be sufficient on their own or used in conjunction with such jets, advantageously make it possible to exploit the kinetic energy of the outgoing flow already treated to achieve the required rotation. Their angle of incidence relative to the velocity vector of the flow and their surface area advantageously allow convenient control of the resulting rotation speed.
They have the further advantage of yielding a maximum torque on starting up.
In brief, a filter in accordance with the invention is advantageously a compact counterflow washed filter using a wash manifold whose output is advantageously reinjected into the treated flow so that washing requires no aspiration or suction system with the result that its construction can with advantage be relatively crude and therefore economical; nor does the filter require any motor to drive the wash manifold and so is not subject to any wear; because the wash manifold is on the same side as the treated outgoing flow, its is not subject to jamming and therefore requires relatively little maintenance.
The features and advantages of the invention will emerge from the following description given by way of example only with reference to the appended diagrammatic drawings in which:
- figure 1 is a view in axial cross-section of a filter in accordance with the invention; - f igure 2 is a view of it in transverse crosssection on the line II-II in figure 1; is - figures 3 and 4 are partial views of it in partial cross-section parallel to its axis on the respective lines III-III and IV-IV in figure 1.
Referring to the ' figures, a filter 10 designed for treating any kind of flow, any kind of flow of water, for example, comprises a fixed body 11, a screen 12 inside the body 11 and at least one wash manifold 13 rotatably mounted inside the screen 12. These arrangements are known in themselves.
The body 11 has an inlet 15A and an outlet 15B and its side wall 16 at least is in the shape of a body of revolution.
The axis A of this body of revolution is shown by a chain-dotted line in figure 1 and its position is shown in figure 2.
The filter 10 is designed to be inserted axially under pressure between two sections 17A, 17B of a pipe, as schematically represented in chain-dotted line in f igure 1, its inlet 15A and its outlet 15B are axial, coaxial with the axis A of the side wall 16 and surrounded by respective f langes 18A, 18B transverse to the axis A for making the appropriate connections.
The body 11 has at the same end as its inlet 15A a back 20 of toroidal shape joining the side wall 16 to a section of pipe 21 at the end of which is the respective transverse flange 18A.
The flange 18B at the same end as the outlet 15B is directly at the end of the side wall 16, being laid against and fastened to a counter-flange 22 mounted on the outside of the side wall 16.
The fixed screen 12 is disposed coaxially inside the body 11, defining an annular space 24 with the side wall 16 thereof. At least its side wall 25, which is a filter wall inserted between the inlet 15A and the outlet 15B of the body 11, is also in the shape of a body of 6 revolution about the axis A.
At the same end as the inlet 15A of the body 11, the screen 12 is closed by a back 26 with which is associated a cap 27 shaped for improved guidance of the incoming flow to be treated. It is open at the same end as the outlet 15B of the body 11.
Only the side wall 25 is a filter wall.
In a manner that is known in itself and not relevant to the present invention, so that there is no need to describe it in detail here, the filter wall may be made up of spaced bars parallel to the axis A joined transversely together by spaced annular cross members defining a grid with the bars.
Over part at least of its length the side wall 16 of the body 11 is generally oblique to the side wall 25 of the screen 12, converging towards the latter in the direction from the inlet 15A of the body 11 to its outlet 15B. At the same end as the outlet 15B of the body 11, at the end of the side wall 25 of the screen 12, there is a collection space 28 adapted to receive debris entrained by the flow to be treated and connected to an evacuation pipe 30.
The side wall 16 of the body 11 is generally frustoconical and the side wall 25 of the screen 12 is generally cylindrical.
The collection space 28 extends radially from the screen 12 towards the axis A.
The collection space 28 is delimited by the side wall 16 and the flange 18B of the body 11, by an annular flange 31 fastened to the respective end of the screen 12 and, like the flange 18B, disposed transversely to the axis A, and by a cylindrical member 33 joining the annular flange 31 to the flange 18B.
At least one nozzle 34 discharges obliquely into the resulting collection space 20A. The nozzle injects 1 ST 110T11m 6t, adTd L. Aq st, duind an-4 jo apTs aba:u.qos-FP eq-4 0-4 P6-40euU00 OSTU eau tú SOTZZOU eql 8t7 STUGS A-TRIOJ PTA ú1 SPTOjTURDI qsRM E)n; SPO0g qO-FI4M PUP EI U0WOS eT4: -;0 -TOTXG;UT 6R4 04 qt adTd p Aq pa4oauuoo sT epTs uoT-4ons esoqm qt duind u go apTs ef5.iuT4z)sTp ei14 o4 tt edTd L. Aq pa4oeuuoo E: jeqwRilD OE P 4T uT sOuTleP PUP ";T SaTJJR0 q07qm luOezOS aW4 JO 9E Xopq en4 q5nojq4 ATT2TxP sGsgud It -4gung mOTTOn enl Et AP4S jo aequieuissojo R Aq pa4o@uuooST T40Pa 90T11m 04 PUP ulaqi 04 J04um BuTPE)eg T 4MS 111OTTOn u uO 04u4OJ 04 Pa;UnOul exe Aeil-4 i13-pT4m Aq ot, qnti uourmoo p moig tunaqpTepupD P 30 sul-TG? OW4 EMT PU8'4xE) ú1 sPI01-TuPM 11sum a111 pue-4xe AGT1.4 llo-rqm BUOIR XTJ'4Pjeuob Gll; 0,4 TOTTU-19d PUP;RTJ Gap SGTZZOU aRl 8c SGTZZOU POORds seTaapo 41 - uioa; eaeq:; az)UR:STP L2 '4R lU UeeJDS eW4;0 SE TIRM ePTS eq4 30 XT- TIP-Teu;95 R BUOTP spue-4xe ET PTOgTupul nsum ROPS suoT;Tsod pesoddo Alluj,4euieTp;p papTAoid eau ú1 sPIO9Tupul 1{slgm TPOT4uGPT om; -4uE)uiTpoquia sTq,4 uI UTU-TP 12 04 -TO;DFD-TUt{DSTP 9 O;;T BUT;DGUUOD LE E)dTcl '-0 0-4 9C 8ATUA P 90 TW-4u00 e'Ll'4 -Tepun pa-4z)auuoD aq oi pE):pdL-pp sT ()ú ed-pd uoT-41E?nDuAe eTA:1 'E e-Tnf)-p_j uT auTT PE);40P-UTI?lli UT PG-4UE)Sejde-7 Sv - I I AP0q OT O; IRT,4U95UP1 ST 41 -tú seTZZOU a11,4 0,4 U0-p;DE)-ITP a-4-psoddo etl-4 U-r -,8E 031eds U0-P-4DOTTOZ) e.q.4 o-4 ATenb-c-rqo pau-roC s-r OE ad-rd uo-c-:L-noL-Ae eql TT Apoq aLl-4 go qT TTRm apTs ail-4 go aDue-ieguinD-TTD uowwoD P 04 i2T, 4uabup: AITPT4up4sqns eau aeaq4 TIP pup v 9TxP 9q4 punoap pa4nqTX;STP AlipInBup -Tnbe eap tú seTzzou aaaq4 4ueuiTpoqtua 9TR4 uI -v sTxp eq.4 -4noqL. uoT,4R,4oj oonpuT o; ja;Rm eni.70 9T 11PM GPTS aTI.4 L gú OE ST 8 represented in figure 1 by a single line.
To rotate the wash manifolds 13 at least one vane 50 at least partly oblique to the axis A of the system is fastened to each wash manifold 13.
In this embodiment two vanes 50 are provided, one for each wash manifold 13, near the end of the wash manifold 13 and each carried by a radial arm 51 fastened to the respective wash manifold 13.
The arms 51 extend radially from the wash manifolds 13 to a tube section 52 centred on the axis A of the system, common to the two arms 51 and providing access to the -hub 40 carrying the wash manifolds 13 for mounting and for demounting them if necessary.
The arms 51 are axially elongated flanges.
The vanes 50 that they carry are in one piece with them, each being simply formed by an oblique lip along one radial edge.
In this embodiment this is the trailing edge but it could equally well be the leading edge.
The vanes 50 extend circularly in the same sense.
The f low to be treated enters the body 11 under pressure through its inlet 15A, as diagrammatically represented by the arrow FA in figure 1.
It then enters the annular space 24 between the body 11 and the screen 12.
Its velocity vector V in this annular space 24 is diagrammatically represented in figure 1.
Because the side wall 16 of the body 11 is oblique to the side wall 25 of the screen 12 the velocity vector 3 is oblique to the latter.
It therefore has a component V1 parallel to the axis A and a component V2 transverse to the axis A.
Because of the component V1 the incoming flow travels along the side wall 25 of the screen 12.
Because of the component V2 it passes through the 1 9 side wall 25.
Debris 25 entrained by the incoming flow to be treated is retained by the screen 12, as diagrammatically shown in figure 1.
The jets from the nozzles 38 temporarily detach the debris from the side wall 25 of the screen 12 each time that a wash manifold 13 passes across it, as diagrammatically represented in figure 1 by arrows Fl.
Returned to the incoming flow, the debris is progressively entrained by the latter towards the collection space 28, in successive steps diagrammatical13, represented by the arrows F2 in figure 1.
Because of the jets from the nozzles 34, debris in the collection space 28 is caused to rotate continuously about the axis A, as diagrammatically represented by the arrows F3 in figure 2.
It is therefore sufficient to open the valve 36 periodically to evacuate the debris through the pipe 30.
This flushing may be controlled by a clock, for example.
After passing through the side wall 25 of the screen 12 the treated flow leaves the body 11 through its outlet 15B as diagrammatically represented by the arrow FB in figure 1.
The thrust exerted in the axial direction on the vanes 50 by the treated outgoing flow rotates the wash manifolds 13 in a direction opposite that in which the vanes 50 extend.. as diagrammatically represented by the arrow F4 in figure 2.
Of course, the present invention is not limited to the embodiment described and shown but encompasses any variant execution thereof.
Specifically, the filter wall of the screen may be implemented differently from that specifically described.
Although the filter is shown as if it were horizontal, this is not necessarily always the case.

Claims (11)

1. Filter comprising a body having an inlet and an outlet and whose side wall at least is in the shape of a body of revolution, a, fixed screen disposed coaxially inside said body and whose side wall at least is a filter wall disposed between an inlet and an outlet of said body and is also in the shape of a body of revolution, and at least one wash manifold rotatably mounted in said screen extending along a generatrix thereof, wherein over part at least of its length the side wall of the body is generally oblique to the side wall of the screen, converging towards the latter in the direction from the inlet of the body to its outlet, and there is provided at the same end of the side wall of the screen as the outlet of the body an annular collection space adapted to receive debris conveyed by the flow to be treated and connected to an evacuation pipe.
2. Filter according to claim 1 wherein at least one nozzle discharges obliquely into said collection space to induce therein rotation about the filter axis.
3. Filter according to claim 2 wherein the evacuation pipe is joined obliquely to the collection space in the opposite sense to the nozzle or nozzles discharging thereinto.
4. Filter according to any one of claims 1 to 3 wherein the collection space extends radially from the screen towards the filter axis.
5. Filter according to any one of claims 1 to 4 wherein at least one vane fastened to said wash manifold - in part oblique to the filter axis is and at least associated with the or each wash manifold to rotate it.
6. Filter according to claim 5 wherein said vane is in the vicinity of the end of the wash manifold and is carried by a radial arm fastened to the latter.
7. Filter according to claim 6 wherein the arm 12 carrying said vane comprises an axially elongate f lange and said vane is in one piece with said arm, constituting an oblique lip along one radial edge thereof.
8. Filter according to claim 6 or claim 7 wherein two wash manifolds are provided at diametrally opposed positions and the arms which carry the respective vanes each extend radially from the respective wash manifold to a tube section centred on the filter axis, common to them and providing access to a hub carrying the wash manifolds.
9. Filter according to any one of claims 1 to 8 wherein the side wall of the body is generally frustoconical and that of the screen is generally cylindrical.
- Filter according to any one of claims 1 to 9 wherein the inlet and the outlet of the body are axial.
11. Filter substantially as hereinbefore described with reference to the accompanying drawing.
1
GB9210714A 1991-06-06 1992-05-20 Filter with rotary washing arms Withdrawn GB2256599A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9106851A FR2677264A1 (en) 1991-06-06 1991-06-06 ROTARY WASHING RAMP FILTER.

Publications (2)

Publication Number Publication Date
GB9210714D0 GB9210714D0 (en) 1992-07-08
GB2256599A true GB2256599A (en) 1992-12-16

Family

ID=9413534

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9210714A Withdrawn GB2256599A (en) 1991-06-06 1992-05-20 Filter with rotary washing arms

Country Status (4)

Country Link
JP (1) JPH05261209A (en)
DE (1) DE4217411A1 (en)
FR (1) FR2677264A1 (en)
GB (1) GB2256599A (en)

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US5425876A (en) * 1993-10-25 1995-06-20 Claude Laval Corporation Gravity screen filter with dynamic backwash
US6398037B1 (en) * 1997-12-18 2002-06-04 “AR-KAL” Plastics Products Reverse flow spin-cleaning liquid filters
US6520752B1 (en) 1999-04-08 2003-02-18 James Peter Hosford Pumps and filter assemblies with application to aquatic and other environments
GB2392855A (en) * 2002-09-13 2004-03-17 Richard Victor Johnson Filter cleaning device
CN1329098C (en) * 2005-07-06 2007-08-01 陈子耀 Sewage filter
EP1874428A1 (en) * 2005-04-14 2008-01-09 Alberto Dibella Voraxial filtration system with self-cleaning auxiliary filtration apparatus
WO2012046240A3 (en) * 2010-10-07 2012-07-05 Amiad Water Systems Ltd. Fluid filtering unit and system
CN104857756A (en) * 2015-06-18 2015-08-26 南通市华盟船舶机械厂 Liquid filter with automatic back washing device
CN105582722A (en) * 2015-11-26 2016-05-18 蚌埠市风驰滤清器有限公司 Backwash type self-cleaning oil filter
CN111495897A (en) * 2020-04-14 2020-08-07 中国一冶集团有限公司 Concrete pouring conduit cleaning device and using method thereof

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EP0815302B1 (en) * 1995-03-24 1999-12-29 Ulrich I. Steinike Moving cleaner
ATE266456T1 (en) * 2000-09-05 2004-05-15 Gerhard Truessel DEVICE FOR FILTRATION OF CONTAMINATED LIQUID, IN PARTICULAR WATER
DK3367801T3 (en) * 2015-10-27 2022-10-03 Feltrim Pastoral Company Pty Ltd An apparatus for storing organic material
CN109499252A (en) * 2018-12-25 2019-03-22 象山平悦环保科技有限公司 Waste gas recovering device
CN114109678B (en) * 2021-11-04 2023-04-18 轻骑集团江门光速摩托车有限公司 Vertical fuel filter

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US5425876A (en) * 1993-10-25 1995-06-20 Claude Laval Corporation Gravity screen filter with dynamic backwash
US6398037B1 (en) * 1997-12-18 2002-06-04 “AR-KAL” Plastics Products Reverse flow spin-cleaning liquid filters
US6520752B1 (en) 1999-04-08 2003-02-18 James Peter Hosford Pumps and filter assemblies with application to aquatic and other environments
GB2392855A (en) * 2002-09-13 2004-03-17 Richard Victor Johnson Filter cleaning device
GB2392855B (en) * 2002-09-13 2004-08-18 Richard Victor Johnson Filter for the removal of suspended solids from a liquid or gas
EP1874428A1 (en) * 2005-04-14 2008-01-09 Alberto Dibella Voraxial filtration system with self-cleaning auxiliary filtration apparatus
EP1874428A4 (en) * 2005-04-14 2010-06-02 Alberto Dibella Voraxial filtration system with self-cleaning auxiliary filtration apparatus
CN1329098C (en) * 2005-07-06 2007-08-01 陈子耀 Sewage filter
WO2012046240A3 (en) * 2010-10-07 2012-07-05 Amiad Water Systems Ltd. Fluid filtering unit and system
CN105268240A (en) * 2010-10-07 2016-01-27 阿迈德水系统有限公司 Fluid filtering unit and system
US9347570B2 (en) 2010-10-07 2016-05-24 Amiad Water Systems Ltd Fluid filtering unit and system
CN105268240B (en) * 2010-10-07 2018-02-02 阿迈德水系统有限公司 Filtering flow unit and system
CN104857756A (en) * 2015-06-18 2015-08-26 南通市华盟船舶机械厂 Liquid filter with automatic back washing device
CN105582722A (en) * 2015-11-26 2016-05-18 蚌埠市风驰滤清器有限公司 Backwash type self-cleaning oil filter
CN111495897A (en) * 2020-04-14 2020-08-07 中国一冶集团有限公司 Concrete pouring conduit cleaning device and using method thereof

Also Published As

Publication number Publication date
JPH05261209A (en) 1993-10-12
GB9210714D0 (en) 1992-07-08
FR2677264A1 (en) 1992-12-11
DE4217411A1 (en) 1992-12-10

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