GB432742A - Improvements in or relating to the cleaning of slow sand filters - Google Patents

Improvements in or relating to the cleaning of slow sand filters

Info

Publication number
GB432742A
GB432742A GB7233/34A GB723334A GB432742A GB 432742 A GB432742 A GB 432742A GB 7233/34 A GB7233/34 A GB 7233/34A GB 723334 A GB723334 A GB 723334A GB 432742 A GB432742 A GB 432742A
Authority
GB
United Kingdom
Prior art keywords
sand
water
separating
valve
pipe
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.)
Expired
Application number
GB7233/34A
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.)
NORMAN GARSTANG ELLIOT
Original Assignee
NORMAN GARSTANG ELLIOT
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 NORMAN GARSTANG ELLIOT filed Critical NORMAN GARSTANG ELLIOT
Priority to GB7233/34A priority Critical patent/GB432742A/en
Publication of GB432742A publication Critical patent/GB432742A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D24/00Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02Filters 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
    • B01D24/20Filters 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 provided in an open container
    • B01D24/205Downward filtration without specifications about the filter material supporting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D24/00Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46Regenerating the filtering material in the filter
    • B01D24/4605Regenerating the filtering material in the filter by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer
    • B01D24/461Regenerating the filtering material in the filter by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer by scrapers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D24/00Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46Regenerating the filtering material in the filter
    • B01D24/4605Regenerating the filtering material in the filter by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer
    • B01D24/4621Regenerating the filtering material in the filter by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer by nozzles acting on the cake side of the filter material, or by fluids acting in co-current direction with the feed stream
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D24/00Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46Regenerating the filtering material in the filter
    • B01D24/4631Counter-current flushing, e.g. by air
    • B01D24/4636Counter-current flushing, e.g. by air with backwash shoes; with nozzles

Abstract

432,742. Filters. ELLIOT, N. G., Mount Green, Halifax Road, Littleborough, Lancashire. Feb. 14, 1935, No. 7233/34. [Class 46] Apparatus for cleaning sand filters comprises a separating member to be lowered into the sand in situ to separate a portion from the remainder, and means on the separating member to cause a flow of water through the separated portion of the sand comprising jets which remain above the surface of the sand and direct streams of water downwardly on to the sand with sufficient force to disturb and wash the sand to a predetermined depth. The separating member may be open at top and bottom and may consist of an annular partition 1 provided with a platform 2 having a central aperture 3 surrounded by a wall 4. A central pipe 6 is connected by a valve 7 and nozzle 8 to a flexible hose 9. The nozzle 8 has an outlet valve 10. A ball bearing 12 supported by the pipe 6 carries a spindle 13 provided with an adjusting nut 17 and ending in a hollow cone 14 provided with apertures 15 and surrounded by a bush 16. Connected with the hollow cone 14 are tubes 19 provided with drag prongs 22 and with jet branches 20. The partition 1 has an annular external flange 23 and a compartment 24 provided with a fly valve 26 operated by a rod 27. An outlet 29 is connected by a nozzle 30 to a flexible hose 31 leading to a discharge pipe below the level of the water in the filter. The separating member is floated into position and then partly filled with water through the valve 10 until the flange 23 engages the surface of the sand. Water to agitate and clear the enclosed sand is then passed under pressure through the pipe 6, tube 19, and the jets, afterwards passing upwards into the separating chamber and out through the open top of the compartment 24 and the hose 31. The reaction causes the tube 19 and spindle 13 to rotate at a speed which is kept low by the action of the drag prongs 22. When the chamber is to be floated to another position the water in it is discharged through the valve 26. To cover the whole area of the filter, the apparatus is operated in overlapping positions, a floating sectional plank and a clamping jack being provided to facilitate correct positioning. The plank is provided with lateral projections to act as positioning stops.
GB7233/34A 1935-02-14 1935-02-14 Improvements in or relating to the cleaning of slow sand filters Expired GB432742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7233/34A GB432742A (en) 1935-02-14 1935-02-14 Improvements in or relating to the cleaning of slow sand filters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7233/34A GB432742A (en) 1935-02-14 1935-02-14 Improvements in or relating to the cleaning of slow sand filters
FR786601D FR786601A (en) 1935-02-14 1935-02-27 Cleaning appliance shortbread basins for slow filtration

Publications (1)

Publication Number Publication Date
GB432742A true GB432742A (en) 1935-08-01

Family

ID=9829189

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7233/34A Expired GB432742A (en) 1935-02-14 1935-02-14 Improvements in or relating to the cleaning of slow sand filters

Country Status (2)

Country Link
FR (1) FR786601A (en)
GB (1) GB432742A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151153A (en) * 1983-11-11 1985-07-17 Projekt Wasserwirtschaft Veb Filter bed cleaning
EP0509345A2 (en) * 1991-04-15 1992-10-21 Forschungszentrum Jülich Gmbh Method for the regeneration of filter beds and filter beds with regeneration devices
FR2706442A1 (en) * 1993-06-14 1994-12-23 Morillon Corvol Courbot Sa Service equipment for a tank, water storage container or the like, especially for a slow sand filter
EP2135657A1 (en) * 2008-06-19 2009-12-23 Nagaoka International Corporation Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatus
CN102879433A (en) * 2011-07-15 2013-01-16 江苏美诚生物科技有限公司 Back-flushing eddy cleaning device for metering cup

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151153A (en) * 1983-11-11 1985-07-17 Projekt Wasserwirtschaft Veb Filter bed cleaning
EP0509345A2 (en) * 1991-04-15 1992-10-21 Forschungszentrum Jülich Gmbh Method for the regeneration of filter beds and filter beds with regeneration devices
EP0509345A3 (en) * 1991-04-15 1994-02-09 Forschungszentrum Juelich Gmbh
FR2706442A1 (en) * 1993-06-14 1994-12-23 Morillon Corvol Courbot Sa Service equipment for a tank, water storage container or the like, especially for a slow sand filter
EP2135657A1 (en) * 2008-06-19 2009-12-23 Nagaoka International Corporation Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatus
US8110116B2 (en) 2008-06-19 2012-02-07 Nagaoka International Corporation Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatus
CN101607755B (en) * 2008-06-19 2013-03-13 株式会社永冈 Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatus
CN102879433A (en) * 2011-07-15 2013-01-16 江苏美诚生物科技有限公司 Back-flushing eddy cleaning device for metering cup

Also Published As

Publication number Publication date
FR786601A (en) 1935-09-06

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