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US20020092814A1 - Filtering apparatus and method for washing its filtering elements - Google Patents

Filtering apparatus and method for washing its filtering elements Download PDF

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Publication number
US20020092814A1
US20020092814A1 US10/090,512 US9051202A US2002092814A1 US 20020092814 A1 US20020092814 A1 US 20020092814A1 US 9051202 A US9051202 A US 9051202A US 2002092814 A1 US2002092814 A1 US 2002092814A1
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US
United States
Prior art keywords
washing
flow
pressure
organ
axle
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.)
Abandoned
Application number
US10/090,512
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English (en)
Inventor
Marko Kangasniemi
Petri Tapola
Tuomo Koivula
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.)
Parker Hannifin Oy
Original Assignee
Parker Hannifin Oy
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 Parker Hannifin Oy filed Critical Parker Hannifin Oy
Assigned to PARKER-HANNIFIN OY reassignment PARKER-HANNIFIN OY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANGASNIEMI, MARKO, KOIVULA, TUOMO, TAPOLA, PETRI
Publication of US20020092814A1 publication Critical patent/US20020092814A1/en
Priority to US10/660,392 priority Critical patent/US6827864B2/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—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
    • 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
    • B01D29/52—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 parallel connection
    • 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
    • B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward 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
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/668—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with valves, e.g. rotating valves for coaxially placed filtering elements
    • 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
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B01D2201/043—Filter tubes connected to plates
    • B01D2201/0453—Filter tubes connected to plates positioned between at least two plates

Definitions

  • the invention relates to a filtering apparatus, comprising an inlet channel for the flow to be filtered, an outlet channel for the filtered flow, a number of parallel filtering elements, into which the flow to be filtered may be directed so that the infiltration occurs out of the element through the element jacket, and at least one rotating washing organ connecting alternately to different elements for forming an outlet channel for the backflushing of elements generated with the pressure of the filtered flow. Further, the invention relates to a method for washing the filtering elements of the apparatus.
  • a filtering device is needed especially in motors as a fuel or luboil filter, with the continuous backflushing of which the operation of the motor is ensured in long-term continuous use.
  • the apparatus typically comprises a large number of filtering elements, the main part of which is continuously in operation while the washing is conducted in one or several elements at a time, depending on the number of washing arms.
  • a state-of-the art backflushable filtering apparatus has been described in the patent publication DE-4 340 275.
  • the apparatus comprises parallel, candle-shaped filtering elements arranged around a vertical axle as two nested rings.
  • the flow to be filtered is directed into the elements from their upper and lower ends, and the infiltration occurs out of the element through the cylindrical jacket of each element.
  • a washing organ consisting of two washing arms of different lengths is arranged below them, the arms being fastened to the rotatable vertical axle of the apparatus.
  • the washing arms are arranged to alternately connect to the lower ends of different filtering elements so that they form outlet channels for the washing flow.
  • closers are attached to the rotating axle of the apparatus above the filtering elements, the closers closing the upper end of the filtering element in question for the duration of the washing stage, thus preventing the flow to be filtered from mixing with the washing flow.
  • the drawback of the solution in the publication DE-4 340 275 is that the rotation of the washing arms is dependent on the flow rate of the flow to be filtered coming into the apparatus, which may vary. If the flow rate is too high, it makes the washing arms to rotate too fast, and the washing periods of the filtering elements remain too short; and again, if the flow rate is too low, the washing arms rotate too slowly from one element to the other, or they stop altogether, if the decelerated flow cannot rotate the turbine rotor any more. The rotation of the washing arms is hindered by the rotor and the transmission mechanism getting dirty, and due to the structure of the apparatus, it is difficult to service the mechanism.
  • the object of the invention is to provide a solution, in which the axle of the apparatus and one or several washing organs are rotated by utilising the flow pressure present in the apparatus so that the drawbacks associated with the state-of-the art technology can be avoided. It is characteristic of the filtering apparatus of the invention that a freewheel clutch is connected to the rotating axle of the washing organ, which converts the reciprocating motion generated by the pressure of the flow present in the apparatus and by the lower pressure alternating with it into a continuously parallel, stepping rotary motion of the washing organ.
  • the rotation of the washing organ and the washing periods in different filtering elements are generated with a pressure difference, which it is possible to keep substantially constant, or which varies less than the flow rate of the flow coming into the apparatus. This ensures that the sufficiently long washing periods are repeated with a suitable frequency in all filtering elements of the apparatus.
  • a substantial advantage of a second solution of the invention is that the freewheel clutch may be arranged outside the filtering room of the apparatus, connected to the rotating axle, so that it is easy to service the freewheel clutch and other organs maintaining the rotating movement, and the service may be carried out while the filtering continues.
  • the freewheel clutch may consist of an actuator driving the rotating axle of the washing organ, which is alternately in sliding contact with the axle and which alternately locks into it so that the axle rotates along with the organ.
  • the movement of the actuator may be generated, for example, by articulating it to a piston reciprocating on the alternating pressure.
  • the pressure of the filtered flow is especially advantageously used for rotating the washing organ, by arranging the said flow to influence the said piston or another organ driving the freewheel clutch.
  • the filtered flow is pure, so that it contaminates the rotating mechanism substantially less than an unfiltered flow.
  • the apparatus of the invention preferably comprises channels and related control valves for connecting the pressure of the filtered flow and the lower counterpressure alternately to different sides of the piston.
  • the lower pressure opposite the said pressure of the filtered flow may be the pressure prevailing in the outlet channel for the washing flow of the apparatus, to which the piston or another actuator may be connected.
  • the outlet channel is generally in the atmospheric pressure prevailing in the surroundings.
  • the solution of the invention makes it possible to hydraulically adjust the rotating movement of the washing organ so that the frequency and duration of the washing periods may be controlled with it.
  • the movement of the washing organ may thus be damped, or it may be stopped exactly at the place of the element to be washed, in which the washing organ remains for a desired time before the movement continues.
  • the filtering elements are washed in the filtering apparatus, comprising an inlet channel for the flow to be filtered, an outlet channel for the filtered flow, and a number of parallel filtering elements, into which the flow to be filtered is directed so that the infiltration occurs out of the element through the element jacket.
  • the washing is achieved by coupling alternately different filtering elements to the rotary washing organ so that the washing occurs as backflushing directed to the washing organ with the pressure of the filtered flow.
  • Essential in the method is that the rotating axle of the washing organ is rotated continuously in the same direction in a stepping manner using a mechanism, the reciprocating movement of which is generated with the pressure of the flow in the apparatus and with the lower pressure alternating with this.
  • the former pressure is advantageously the pressure of the clean flow filtered in the apparatus, and the lower pressure is the ambient pressure present in the washing arm.
  • the steps of the washing organ may be generated with a freewheel clutch, comprising an organ driving the rotating axle of the washing organ, which is alternately in sliding contact with the axle and which alternately locks into it for rotating the axle, the said organ being moved with a piston articulated with it, the piston being reciprocated by coupling the said pressures of different sizes alternately to its different sides.
  • FIG. 1 is a vertical section of a filtering apparatus of the invention
  • FIG. 2 is a horizontal section II-II of FIG. 1, in which the parallel filtering elements of the apparatus and the washing organs above them are shown;
  • FIG. 3 shows the freewheel clutch and control valves connected to it for rotating the axle of the apparatus in the one extreme position of the coupling movement, as a section III-III of FIG. 1;
  • FIG. 4 is a similar view to FIG. 3, presenting the freewheel clutch in its other extreme position;
  • FIG. 5 shows the freewheel clutch of a second embodiment of the invention, with the related control valve, the coupling movement being in the other extreme position;
  • FIG. 6 shows the freewheel clutch of FIG. 5 in the middle position between the extreme positions of its movement
  • FIG. 7 is a vertical section of the coupling apparatus of FIGS. 5 and 6.
  • FIGS. 1 and 2 there is shown a filtering apparatus, which may work, for example, as the luboil filter of a diesel motor, continuously filtering oil as the motor is running.
  • the apparatus comprises a jacket 1 , an inlet channel 2 for the flow to be filtered, an outlet channel 3 for the filtered flow, and a number of longitudinal, candle-shaped filtering elements 5 arranged as two nested rings around the middle axis 4 of the apparatus.
  • the jackets of the elements 5 are made of porous filtering material, which retains the solid particles or other impurities in the flow as the flow extends from the interior of the elements through the jacket and out of the elements.
  • each element is open both from its upper end 6 and lower end 7 .
  • the spaces between the ends 6 , 7 of adjacent filtering elements are closed with a horizontal plate 8 , 9 both at the lower and the upper end of the elements.
  • the plates 8 , 9 are further connected to each other with a vertical, cylindrical wall 10 , which confines in its interior a vertical flow channel 11 for the flow to be filtered.
  • the flow can spread into the space restricted by the jacket 1 , from where it is transferred into the elements through the open ends 6 , 7 of the filtering elements 5 , extends through the element jackets out of the elements and is discharged as purified into the outlet channel 3 .
  • each of the candle-shaped filtering elements 5 is divided in two by a horizontal, solid partition 12 .
  • Each element 5 thus comprises an upper part 13 open from its upper end and a lower part 14 open from its lower end, through which the flows to be filtered travel independent from each other.
  • the apparatus is provided with backflushing, which is conducted with the pressure of the filtered flow in the direction opposite to the flow to be filtered through the element jackets, i.e. from the outside of the jackets into them.
  • washing organs 15 connecting alternately to different ends 6 , 7 of the elements are arranged for coupling the elements to the lower pressure for generating the washing flow. Both washing organs consist of two washing arms 15 , the lengths of which are equal to the radii of the nested rings formed by the elements.
  • the washing arms are made of a hollow tube, and they are fastened to the likewise hollow middle axle 4 of the apparatus so that together they work as discharge channels 16 for the washing flow cleaning the element.
  • the discharge channels 16 are directed to the lower part of the apparatus, from where the washing flow is suitably discharged, for example, to the discharge assembly 18 in atmospheric pressure, after having passed through the filter 17 .
  • the backflushing works so that the axle 4 with the washing arms 15 fastened to it performs a rotating movement counter clockwise so that the washing arms connect from their ends alternately to the ends 6 , 7 of different filtering elements 5 , thus coupling the interiors of these elements to a pressure which is lower than the pressure of the filtered flow in the discharge channels 16 and the discharge assembly 18 , thus generating the backflushing.
  • the washing occurs in the part between the end of the element 5 and the partition 12 at the same time as the opposite end of the element is open so that the filtering may continue in the part restricting to the said open end of the element.
  • the rotating movement of the construction consisting of the axle 4 belonging to the apparatus and of the washing arms 15 rigidly attached to the axle is generated with a mechanism, the structure and operation of which may be seen in FIGS. 3 and 4.
  • the rotating mechanism is arranged into the casing 19 above the filtering space defined by the jacket 1 of the apparatus, the end 20 of the axle 4 of the apparatus extending into this casing.
  • the axle 20 is driven by a freewheel clutch, which comprises an organ 21 annularly circulating the axle and moving in a reciprocating manner in accordance with FIGS. 3 and 4 so that it is alternately in sliding contact with the axle and that it alternately locks into the axle for rotating the axle along with the organ, depending on the direction of the movement.
  • Such coupling arrangements which may be based, for example, on an inclined, flexible or yielding cogging, are known as such.
  • the organ 21 thus slides from the position according to FIG. 3 to the position according to FIG. 4 on the axle 20 , which remains stationary, but as the organ returns back to the position in FIG. 3, it locks into the axle rotating it along one step counter clockwise.
  • the axle 20 steps counter clockwise, rotating the washing arms 15 (FIGS. 1 and 2) so that they alternately connect different filtering elements 5 to the washing stage.
  • the annular organ 21 circulating the axle 20 is provided with two protruding arms 22 , 23 arranged opposite each other, the one arm 22 being articulated to the piston 25 moving in the cylinder 24 .
  • the piston 25 is moved in the cylinder 24 back and forth utilising the higher pressure of the filtered flow present in the filtering room of the apparatus and the lower pressure of the washing channels 16 , by connecting these to the cylinder alternately in different sides of the piston. From the side of the filtered flow, the filtering room is in contact with the casing 19 containing the freewheel clutch through the channel 26 (FIG. 1) so that the casing is filled with the filtered substance, such as lubricating oil.
  • a connection is built from the casing 19 to the flushing channels 16 through the channel 27 .
  • the piston 25 is controlled with the main valve 28 and two control valves 29 , 30 controlling it.
  • the main valve 28 is connected to the cylinder 24 at different sides of the piston 25 driving the freewheel clutch using the tubes 31 , 32 .
  • the leftmost control valve 29 is connected to the front end of the main valve 28 with the tube 33
  • the rightmost control valve 30 is connected to the back end of the main valve with the tube 34 .
  • the main valve 28 and the control valves 29 , 30 are connected to the said channel 27 in the lower pressure with the tubes 35 , 36 , 37 , 38 .
  • the arm 23 of the actuator 21 has pressed the piston 39 inside the leftmost control valve 29 against the spring into a position in which it releases the higher pressure in the casing 19 from the assembly 40 into the tube 33 and from there to the front end of the main valve 28 , in which it has pushed the piston of the main valve to a position in which the pressure in the casing 19 has connected from the assembly 42 to the tube 31 , which connects the pressure with the cylinder 24 to the right side of the piston 25 driving the freewheel clutch.
  • the back end of the main valve 28 is connected to the lower pressure in the channel 27 through the tube 34 , the right control valve 30 and the tube 38 .
  • the movement of the piston 41 of the main valve 28 connects the cylinder 24 to the said lower pressure from the left side of the piston 25 through the tube 32 , the main valve and the tube 35 .
  • the duration of the washing periods may be adjusted by stopping the washing arm 15 at the place of the element 5 to be washed for a desired period.
  • the adjustment may be achieved, for example, with flow controller valves (not shown) installed into the tubes 31 and 32 , which slow down the reverse stroke of the piston 25 of the cylinder 24 , so that the arm 15 stays stationary during the movement in question.
  • Alternative ways for adjusting the rotating movement of the arm 15 may include the adjustment of the pressure prevailing in the casing by choking the flow going into or out from the cylinder 24 in the channels 26 and 27 with a valve or valves placed in the channel 26 .
  • FIGS. 5 - 7 show an alternative control arrangement for the freewheel clutch for rotating the axle 20 and the washing arms of the filtering apparatus.
  • the structure in FIGS. 5 - 7 corresponds to that shown above in connection of FIGS. 3 and 4, and therefore, they are not explained in more detail here.
  • valve 28 which corresponds to the main valve 28 in FIGS. 3 and 4, forms the only control valve of the system.
  • FIG. 5 shows the position of the ring 21 and the left arm 44 , in which the arm has pushed the piston of the valve 28 into the extreme right position of the piston.
  • the piston of the cylinder 24 has rotated the ring 21 counter clockwise by pushing the arm 22 to the half-way of the movement, in which the arms 44 , 45 driving the valve 28 are both detached from the ends of the valve.
  • the right arm 45 pushes the piston of the valve 28 to the position extremely in the left, so that the pressures in different sides of the piston of the cylinder 24 switch places and start the reverse stroke of the piston and the rotation of the ring 21 clockwise back into the position according to FIG. 5.
  • the freewheel clutch controlled with the pressure difference has the problem that if the pressure difference is small and/or if there is friction in the moving parts of the mechanism, it easily occurs that the piston of the cylinder 24 begins to move but it does not have enough strength to complete the movement, but it stops without achieving the rotation of the axle 20 . It may also happen that the strength of the arm 44 , 45 is not sufficient to move the piston of the valve 28 , which is the condition for the continuance of operation of the apparatus.
  • the coupling comprises a separate coupling ring 47 provided with the crank arm 46 of its own, which is also pivoted to rotate the axle 20 .
  • the arms 44 , 45 moving the piston of the valve 28 are attached to the latter ring 47 .
  • the rotation of the arm 46 and the coupling ring 47 is achieved with the help of magnets in the arm installed stationarily in relation to the casing 19 .
  • the end 46 of the arm is provided with a magnet 48 , which is attracted by the magnets 49 , 50 in FIGS. 5 and 6 installed stationarily to the ends of the path.
  • the arm 46 comprises a second magnet 51 , with two repelling magnets 52 , 53 placed above and below.
  • the three magnets 51 , 52 , 53 mentioned last are situated opposite each other as the arm 46 is in the half-way of its movement according to FIG. 6.
  • the arm 46 which until now has moved along with the arm 22 pushed by the piston of the cylinder 24 , is able to move in front of the arm 22 pushed by the piston within the tolerance adjusted by the control screws 54 seen in FIGS. 5 and 6, and to finish the rotating movement by rotating the coupling ring 47 .
  • the rotating movement is no longer dependent on the pressure difference prevailing in the piston cylinder 24 , and the rotating movement accelerated towards the end by the magnets does not tend to remain unfinished, as could happen when operating merely on the pressure difference and the cylinder piston.
  • the attracting magnets 48 - 50 or the repelling magnets 51 - 53 may by themselves be enough to achieve the effect intensifying the necessary rotary movement.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Transmission Devices (AREA)
  • Cleaning By Liquid Or Steam (AREA)
US10/090,512 1999-09-20 2002-03-04 Filtering apparatus and method for washing its filtering elements Abandoned US20020092814A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/660,392 US6827864B2 (en) 1999-09-20 2003-09-11 Filtering apparatus and method for washing its filtering elements

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI991997A FI107021B (fi) 1999-09-20 1999-09-20 Suodatuslaitteisto ja menetelmä sen suodatinelementtien huuhtelemiseksi
FI19991997 1999-09-20
PCT/FI2000/000800 WO2001021280A1 (en) 1999-09-20 2000-09-20 Filtering apparatus and method for washing of its filtering elements

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2000/000800 Continuation WO2001021280A1 (en) 1999-09-20 2000-09-20 Filtering apparatus and method for washing of its filtering elements

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/660,392 Continuation US6827864B2 (en) 1999-09-20 2003-09-11 Filtering apparatus and method for washing its filtering elements

Publications (1)

Publication Number Publication Date
US20020092814A1 true US20020092814A1 (en) 2002-07-18

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ID=8555313

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US10/090,512 Abandoned US20020092814A1 (en) 1999-09-20 2002-03-04 Filtering apparatus and method for washing its filtering elements
US10/660,392 Expired - Lifetime US6827864B2 (en) 1999-09-20 2003-09-11 Filtering apparatus and method for washing its filtering elements

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/660,392 Expired - Lifetime US6827864B2 (en) 1999-09-20 2003-09-11 Filtering apparatus and method for washing its filtering elements

Country Status (10)

Country Link
US (2) US20020092814A1 (de)
EP (1) EP1231998B1 (de)
JP (1) JP4043786B2 (de)
KR (1) KR100752788B1 (de)
DE (2) DE1231998T1 (de)
DK (1) DK1231998T3 (de)
ES (1) ES2183751T3 (de)
FI (1) FI107021B (de)
NO (1) NO20021352D0 (de)
WO (1) WO2001021280A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030136715A1 (en) * 2000-05-19 2003-07-24 Willi Rott Backflush filter, in particular for filtering lubricant oil
US20070262003A1 (en) * 2004-11-12 2007-11-15 Tiefenbach Control System Gmbh Method to operate a flushable filter column for a liquid
CN115075084A (zh) * 2022-05-30 2022-09-20 河南省科学院地理研究所 一种海绵城市渗排水装置

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DE102004004756A1 (de) 2004-01-30 2005-08-25 Hydac Process Technology Gmbh Filtervorrichtung
KR100630372B1 (ko) 2005-02-04 2006-09-29 주식회사 에네트 여과장치
US7487875B2 (en) * 2005-08-30 2009-02-10 General Electric Company Candle filter assembly and candle filter element
FI121367B (fi) * 2008-07-29 2010-10-29 Parker Hannifin Oy Kääntölaite ja sitä soveltava suodatusmenetelmä
CN101658741B (zh) * 2009-09-28 2011-05-04 郑业 流体自动过滤的回流反洗机构
KR101287090B1 (ko) * 2011-10-13 2013-07-17 주식회사 파나시아 고밀도 필터 구조의 고효율 캔들 타입 밸러스트수 여과장치
KR101287114B1 (ko) * 2011-10-14 2013-07-17 주식회사 파나시아 배압형성을 방지하는 캔들 타입 밸러스트수 여과장치
CN117018739B (zh) * 2022-12-23 2025-10-10 珂睿斯科技(深圳)有限公司 一种净水滤芯的自清洁方法

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US3169109A (en) * 1962-04-16 1965-02-09 Hirs Gene Filter apparatus
US3176946A (en) 1963-12-11 1965-04-06 Floyd M Burdick Watch holder
FR1437838A (fr) * 1965-06-11 1966-05-06 Filtre comportant un dispositif de nettoyage automatique pour tous fluides
US3476248A (en) * 1968-03-01 1969-11-04 Renard P Adams Suction backwash means for a low pressure,multiple element,filter assembly
US4482461A (en) * 1982-12-20 1984-11-13 French Systems, Inc. Backwash control for constant volume-pressure filtration system
DE4030084C2 (de) * 1990-09-22 1999-09-30 Boll & Kirch Filter Rückspülfilter
DE4345412C2 (de) * 1993-11-26 1999-11-11 Boll & Kirch Filter Filterkerze
DE4340275C2 (de) * 1993-11-26 1999-10-21 Boll & Kirch Filter Rückspülfilter
FI110483B (fi) * 1999-09-20 2003-02-14 Parker Hannifin Oy Suodatuslaitteisto

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030136715A1 (en) * 2000-05-19 2003-07-24 Willi Rott Backflush filter, in particular for filtering lubricant oil
US6890434B2 (en) * 2000-05-19 2005-05-10 Boll & Kirch Filterbau Gmbh Backflush filter, in particular for filtering lubricant oil
US20070262003A1 (en) * 2004-11-12 2007-11-15 Tiefenbach Control System Gmbh Method to operate a flushable filter column for a liquid
CN115075084A (zh) * 2022-05-30 2022-09-20 河南省科学院地理研究所 一种海绵城市渗排水装置

Also Published As

Publication number Publication date
ES2183751T1 (es) 2003-04-01
JP2003509203A (ja) 2003-03-11
US20040050803A1 (en) 2004-03-18
DE60035893T2 (de) 2008-04-17
NO20021352L (no) 2002-03-19
ES2183751T3 (es) 2008-02-16
NO20021352D0 (no) 2002-03-19
US6827864B2 (en) 2004-12-07
JP4043786B2 (ja) 2008-02-06
DE60035893D1 (de) 2007-09-20
KR100752788B1 (ko) 2007-08-29
DE1231998T1 (de) 2003-02-06
KR20020029939A (ko) 2002-04-20
EP1231998A1 (de) 2002-08-21
DK1231998T3 (da) 2007-11-19
WO2001021280A1 (en) 2001-03-29
FI107021B (fi) 2001-05-31
FI19991997A7 (fi) 2001-03-20
EP1231998B1 (de) 2007-08-08

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