GB2249736A - Filtering apparatus - Google Patents

Filtering apparatus Download PDF

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Publication number
GB2249736A
GB2249736A GB9114211A GB9114211A GB2249736A GB 2249736 A GB2249736 A GB 2249736A GB 9114211 A GB9114211 A GB 9114211A GB 9114211 A GB9114211 A GB 9114211A GB 2249736 A GB2249736 A GB 2249736A
Authority
GB
United Kingdom
Prior art keywords
effluent
pump
filtering
conveyance
filtered
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Withdrawn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
GB9114211A
Other versions
GB9114211D0 (en
Inventor
Anthony Dewhurst
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.)
BKW ENGINEERING Ltd
Original Assignee
BKW ENGINEERING Ltd
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 BKW ENGINEERING Ltd filed Critical BKW ENGINEERING Ltd
Publication of GB9114211D0 publication Critical patent/GB9114211D0/en
Publication of GB2249736A publication Critical patent/GB2249736A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/26—Filters with built-in pumps filters provided with a pump mounted in or on the casing
    • 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
    • B01D29/01—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 flat filtering elements
    • B01D29/03—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 flat filtering elements self-supporting
    • B01D29/035—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 flat filtering elements self-supporting with curved 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
    • B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
    • B01D29/605—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by level measuring
    • 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
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
    • B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
    • 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
    • B01D29/88—Filters 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
    • B01D29/90—Filters 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 feeding
    • 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
    • B01D29/88—Filters 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
    • B01D29/92—Filters 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/143—Filter condition indicators

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Filtering apparatus for farm slurry comprises a submerged hydraulic feed pump 11 connected by hose 17 to an overflow tank at one end of a curved perforate filter screen 12, and a second pump 13 which receives the filtrate from beneath the screen and delivers it through hose 24 to an irrigation sprinkler 14. Solids are swept from the screen by an array of rotating brushes 23 over chute 18. The brush drive motor and pump 11 may be controlled by a float switch in slurry pit 26. Light 29 indicates pump malfunctioning. Tanks upstream and downstream of screen 12 have overflows 27, 28. <IMAGE>

Description

FILTERING APPARATUS This invention relates to filtering apparatus particularly for use in an agricultural environment.
In agricultural establishments such as farms for example, relatively large amounts of liquid effluent waste material is commonly produced.
It has been realised that if the solid waste material is removed from the effluent waste, then it would be possible to use the liquid constituent to satisfy the irrigation needs of the land. It is possible to use a three stage settlement tank arrangement to achieve the removal of the solid waste, however the problem with this arrangement is that a relatively large area is required to accommodate the tanks and furthermore the cost and time involved may well be prohibitive to some establishments.
It is an object of the present invention to provide filtering apparatus which is of a particularly simple construction and is relatively quick and inexpensive in operation.
According to the present invention therefore there is provided filtering apparatus for liquid effluent comprising means to cause conveyance of effluent to said apparatus, filtering means through which said effluent can be filtered and means operable to cause movement of said filtered effluent to a remote location.
With this arrangement it is possible to filter effluent in a simple, quick and inexpensive manner.
Preferably said means to cause conveyance of effluent comprises a pump which may be of the submersible type. Said pump may comprise a hydraulic pump of conventional form.
Said means may cause conveyance of effluent to said apparatus via intake means Said intake means may comprise two interconnected parts, one part of which may be flexible and the other part of which may be rigid.
Said flexible part may comprise rubber or plastics tubing and said rigid part may comprise a metallic pipe. Said rigid part may be fixed to or be formed integrally with the apparatus.
Said apparatus may further include effluent storage means adapted to receive said effluent therein and said effluent storage means may be connected directly or indirectly to said intake means whereby material is conveyed into said effluent storage means by said conveyance means.
Said effluent storage means may comprise a tank which may be rectangular in configuration.
Said effluent storage means may have at least one wall or at least a part thereof of reduced height relative to the remainder of said means. Said storage means may be disposed substantially adjacent said filtering means and in particular said at least one wall of reduced height may be adjacent said filtering means.
Said filtering means may comprise a perforated sheet and furthermore may be of concave form.
Said apparatus may further include sweeping means which may be disposed above said filtering means and may be operable to sweep at least one surface of said filtering means. Said sweeping means may be rotatably mounted and may comprise multiple radially projecting arms, each arm having a brush mounted on an end thereof.
A filtration receiving means may be disposed below said filtering means and may comprise a tank.
Said means to cause movement of said filtered effluent may be connected to said filtrate receiving means and may comprise a pump. Said pump may be connected to said remote location by way of outlet means which may comprise plastics or rubber tubing.
Said remote location may comprise a remote sprinkler or similar.
The invention will now be described further by way of example only and with reference to the accompanying drawing, the single figure of which shows, partly in section, a perspective view of one form of apparatus according to the invention.
Referring now to the drawing there is shown an effluent filtering machine 10 which filters the solid waste material from a liquid effluent to give a liquid suitable for irrigation purposes.
The filtering machine 10 comprises a first pump 11 to pump effluent to the machine 10, a feed tank (not shown) to receive the effluent, a filtration mesh 12, a holding tank (not shown) to receive the filtered effluent and a second pump 13 to pump the filtered liquid to a desired remote location 14.
The first pump 11 comprises a hydraulic pump of conventional form which is able to be submersed in the effluent in operation.
The feed tank (not shown) is disposed within a machine housing and is a generally rectangular stainless steel tank. An intake conduit 16 thereof is linked to the first pump 11 by way of an intake hose 17.
A perforated filtration mesh 12 is also mounted within the housing substantially adjacent the feed tank in such a position that effluent can flow over one side of the tank and onto the mesh 12. In order to achieve this, one wall of the tank can be of reduced height relative to the remaining walls. The mesh 12 is mounted in the housing so as to adopt a concave form and one end thereof is secured to a downwardly inclined discharge chute 18.
A rotor arrangement 19 is disposed above the mesh 12 within the housing. The arrangement is of generally cross-shaped form having two projecting arms 21 mounted for rotation on a central shaft 22. The arms 21 are fixed substantially at 1800 relative to each other and each arm 21 has a brush 23 secured to one end thereof.
The rotor arrangement 19 is driven by an electric motor (not shown) which is operable to cause rotation of the central shaft 22, for a purpose to be described hereinafter.
A holding tank (not shown) is also disposed in the housing in a position directly below the filtration mesh 12 to receive the filtered effluent therein.
The second pump 13 is connected to the holding tank and is of conventional form. The second pump 13 links the holding tank and an outlet hose 24 and is operable to pump liquid from the holding tank, through the outlet hose 24 to a remote location 14.
In use the filtering machine 10 is located adjacent an effluent collection pit 26 or similar. The first pump 11 is positioned in the pit 26 submersed in the effluent.
Actuation of the first pump 11 causes effluent to be pumped through the hose 17 and intake conduit 16 into the feed tank. Thus the feed tank fills up with effluent material until the level of material therein exceeds the height of the one wall of the tank. At this time the effluent will flow over the wall and will fall onto the filtration mesh 12. A float switch (not shown) is provided in conjunction with the first pump 11 and which is operable to cause actuation of first pump 11 and the motor to drive the rotor arrangement 19 due to the presence of effluent in the collection pit 26.
Alternatively the motor to drive the rotor arrangement can be actuated by actuation of the first pump.
When the effluent drops onto the filtration mesh 12 it will be appreciated that any solid or particulate matter of greater size than the perforations in the mesh 12 will be retained on an upper surface thereof, whilst the liquid constituent and smaller solid matter will pass through the mesh into the holding tank below.
The rotating rotor arrangement 19 is positioned such that on rotation thereof, each of the brushes 23 mounted on the ends of each respective arm 21 sweeps across the surface of the mesh 12 removing the solid matter thereon and causing the same to be discharged from the machine 10 down the discharge chute 18. It will be appreciated that the mesh 12 can be chosen to have any desired perforation size such that matter greater than such desired size will not pass therethrough and furthermore the speed of rotation of the rotor can be variable or fixed, as desired, a typical speed being 8 revs/min.
Once the filtered effluent has been collected in the holding tank, the second pump 13 can be actuated manually or automatically to pump the filtered effluent down outlet hose 24 to a remote location, for example the sprinkler shown at 14 on the figure for irrigation or other purposes.
Both feed and holding tanks have respective overflow outlets 27, 28 associated therewith whereby if the level of effluent or filtered effluent rises to an unacceptable level then the material is discharged through the overflow outlets 27, 28 directly back into the effluent collection pit 26.
Furthermore, the machine 10 also incorporates a warning light 29 which is shown mounted on the top of the machine and which is connected via suitable circuitry to the or each pump 11, 13. The light 29 is caused to be actuated when a malfunction occurs in the or each pump 11, 13 to warn a user of this malfunction.
With this arrangement it is possible to filter effluent in a simple, convenient and inexpensive manner.
It is of course to be understood that the invention is not intended to be restricted to the details of the above embodiment which are described by way of example only.

Claims (32)

1. Filtering apparatus for liquid effluent comprising means to cause conveyance of effluent to said apparatus, filtering means through which said effluent can be filtered and means operable to cause movement of said filtered effluent to a remote location.
2. Apparatus according to claim 1 wherein said means to cause conveyance of effluent comprises a pump.
3. Apparatus according to claim 2 wherein said pump is of a submersible type.
4. Apparatus according to claim 2 or claim 3 wherein said pump is a hydraulic pump.
5. Apparatus according to any one of claims 1 to 4 wherein said conveyance means causes conveyance of effluent to said apparatus via intake means.
6. Apparatus according to claim 5 wherein said intake means comprises two interconnected parts.
7. Apparatus according to claim 6 wherein one part of said interconnected parts is flexible.
8. Apparatus according to claim 6 or claim 7 wherein another part of said interconnected parts is rigid.
9. Apparatus according to claim 7 wherein said flexible part comprises rubber or plastics tubing.
10. Apparatus according to claim or claim 9 wherein said rigid part comprises a metallic pipe.
11. Apparatus according to any one of claims 8 to 10 wherein said rigid part is fixed to the apparatus.
12. Apparatus according to any one of claims 8 to 10 wherein said rigid part is formed integrally with the apparatus.
13. Apparatus according to any one of claims 1 to 12 further including effluent storage means adapted to receive effluent therein.
14. Apparatus according to claim 13 wherein said effluent storage means is connected directly or indirectly to said intake means whereby material is conveyed into said effluent storage means by said conveyance means.
15. Apparatus according to claim 13 or claim 14 wherein said effluent storage means comprises a storage tank.
16. Apparatus according to any one of claims 13 to 15 wherein said effluent storage means has at least one wall, or at least a part thereof, of reduced height relative to the remainder of said means.
17. Apparatus according to any one of claims 13 to 16 wherein said storage means is disposed substantially adjacent said filtering means.
18. Apparatus according to claim 17 when dependent on claim 16 wherein said at least one wall of reduced height is adjacent said filtering means.
19. Apparatus according to any one of claims 1 to 18 wherein said filtering means comprises a perforated sheet.
20. Apparatus according to any one of claims 1 -to 19 wherein said filtering means is of concave form.
21. Apparatus according to any one of claims 1 to 20 wherein said apparatus further includes sweeping means operable to sweep at least one surface of said filtering means.
22. Apparatus according to claim 21 wherein said sweeping means is disposed above said filtering means.
23. Apparatus according to claim 21 or claim 22 wherein said sweeping means is rotatably mounted.
24. Apparatus according to claim 23 wherein said sweeping means comprises multiple radially projecting arms, each arm having a brush mounted on an end thereof.
25. Apparatus according to any one of claims 1 to 24 further including a filtration receiving means disposed below said filtering means.
26. Apparatus according to claim 25 wherein said receiving means comprises a tank.
27. Apparatus according to any one of claims 1 to 26 when dependent on claim 25 wherein said means to cause movement of said filtered effluent is connected to said filtration receiving means.
28. Apparatus according to any one of claims 1 to 27 wherein said means to cause movement of said filtered effluent comprises a pump.
29. Apparatus according to claim 28 wherein said pump is connected to said remote location by way of outlet-means.
30. Apparatus according to claim 29 wherein said outlet means comprises plastics or rubber tubing.
31. Apparatus according to any one of claims 1 to 30 wherein said remote location comprises a remote sprinkler.
32. Apparatus substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
GB9114211A 1990-06-30 1991-07-01 Filtering apparatus Withdrawn GB2249736A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909014630A GB9014630D0 (en) 1990-06-30 1990-06-30 Filtering apparatus

Publications (2)

Publication Number Publication Date
GB9114211D0 GB9114211D0 (en) 1991-08-21
GB2249736A true GB2249736A (en) 1992-05-20

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GB909014630A Pending GB9014630D0 (en) 1990-06-30 1990-06-30 Filtering apparatus
GB9114211A Withdrawn GB2249736A (en) 1990-06-30 1991-07-01 Filtering apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB909014630A Pending GB9014630D0 (en) 1990-06-30 1990-06-30 Filtering apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2715865A1 (en) * 1994-02-08 1995-08-11 Sevylor International Filtration unit for a water tank, esp. a swimming pool
US6953524B2 (en) * 2000-08-29 2005-10-11 Hydro International Plc Screen assembly for combined sewer overflow weir

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1456669A (en) * 1973-05-10 1976-11-24 Longwood Eng Co Ltd Apparatus for de-watering slurries
US4424125A (en) * 1981-12-14 1984-01-03 Axis Products Limited Separator apparatus
GB2232443A (en) * 1989-06-09 1990-12-12 Hanford Eng Ltd A venturi pump apparatus
GB2234268A (en) * 1989-07-27 1991-01-30 Hitech Equipment Limited Drain cleaning apparatus
GB2235393A (en) * 1989-08-25 1991-03-06 Wu Kie Pyng Waste separator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1456669A (en) * 1973-05-10 1976-11-24 Longwood Eng Co Ltd Apparatus for de-watering slurries
US4424125A (en) * 1981-12-14 1984-01-03 Axis Products Limited Separator apparatus
GB2232443A (en) * 1989-06-09 1990-12-12 Hanford Eng Ltd A venturi pump apparatus
GB2234268A (en) * 1989-07-27 1991-01-30 Hitech Equipment Limited Drain cleaning apparatus
GB2235393A (en) * 1989-08-25 1991-03-06 Wu Kie Pyng Waste separator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2715865A1 (en) * 1994-02-08 1995-08-11 Sevylor International Filtration unit for a water tank, esp. a swimming pool
US6953524B2 (en) * 2000-08-29 2005-10-11 Hydro International Plc Screen assembly for combined sewer overflow weir

Also Published As

Publication number Publication date
GB9114211D0 (en) 1991-08-21
GB9014630D0 (en) 1990-08-22

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)