WO2012159158A1 - Système pour lavage à contre-courant - Google Patents

Système pour lavage à contre-courant Download PDF

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Publication number
WO2012159158A1
WO2012159158A1 PCT/AU2012/000570 AU2012000570W WO2012159158A1 WO 2012159158 A1 WO2012159158 A1 WO 2012159158A1 AU 2012000570 W AU2012000570 W AU 2012000570W WO 2012159158 A1 WO2012159158 A1 WO 2012159158A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
debris
fluid
water
debris trap
Prior art date
Application number
PCT/AU2012/000570
Other languages
English (en)
Inventor
Ross Leslie Palmer
Oleksandr Babych
Craig O'NEIL
Original Assignee
Poolrite Research Pty 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
Priority claimed from AU2011901981A external-priority patent/AU2011901981A0/en
Application filed by Poolrite Research Pty Ltd filed Critical Poolrite Research Pty Ltd
Publication of WO2012159158A1 publication Critical patent/WO2012159158A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/12—Devices or arrangements for circulating water, i.e. devices for removal of polluted water, cleaning baths or for water treatment
    • E04H4/1209—Treatment of water for swimming pools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4631—Counter-current flushing, e.g. by air
    • B01D24/4642—Counter-current flushing, e.g. by air with valves, e.g. rotating valves
    • 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

Definitions

  • This invention is concerned with water processing, particularly although not exclusively with efficient backwashing of bodies of water.
  • a backwash and rinse cycle for a sand filter can consume between 1000 litres to 10,000 litres each week depending upon the. amount of contamination extracted from the pool water by the filter.
  • Commercial pools can consume hundreds of thousands of litres of water per month.
  • water is drawn from the pool via the filter pump and then through the filter medium to a storm water drain or sewer drain as required by local government authorities. In some regions authorities do not allow waste outlets to be connected to any external drains.
  • water in the pool is required to contain about 6000 ppm of sodium chloride (NaCI) for effective operation of the electrolytic chlorinator.
  • NaCI sodium chloride
  • Such a high salt content in the backwash and rinse water renders it unsuitable for collection and use for garden irrigation as in other grey water conservation systems due to the gradual accumulation of sodium chloride in the soil leading to degenerative salination of the soil.
  • the expression “swimming pool” is also intended to embrace the analogous use of spa baths, hot tubs, water parks and the like which are operated in a substantially identical manner to swimming pools.
  • the expression “backwash” is intended to include all water flows from a swimming pool filter, including backwash, rinse and bypass flows.
  • a backwash system for a body of fluid comprising:
  • a filter including filter medium
  • a debris trap for capturing debris from the filter medium
  • the debris trap is fluidly connected to the filter.
  • a backwash system for a body of fluid comprising:
  • a filter including filter medium
  • a debris trap for capturing debris from the filter medium
  • the debris trap is fluidly connected to the filter.
  • the fluid in the system of the invention can be water from a body of water such as a swimming pool, spa, waterpark, water cooling tower, waste water treatment plant, brewery, wine making facility, aquaculture facility or the like.
  • a body of water such as a swimming pool, spa, waterpark, water cooling tower, waste water treatment plant, brewery, wine making facility, aquaculture facility or the like.
  • the water is from a swimming pool or spa.
  • the water used to remove the debris from the filter medium can be returned to the body of water from whence it originated after capture of the debris in the debris trap.
  • the filter medium is generally included in a filter already fitted to the filtration system of the body of water, such as a swimming pool or spa.
  • the invention can be applied to any filter or filter medium, for example filters using media such as sand, diatomaceous earth, glass, zeolite, granular activated carbon, or filters such as bag filters, membrane filters, sieves or set of sieves or screens.
  • the body of water to which the invention is applicable can be any body of water which is filtered and backwashed on a regular basis, or irregularly, such as swimming pools, spas, water reservoirs for cooling towers and chemical/treatment plants.
  • the debris trap of the invention can be any debris trap that will adequately capture the debris in the water exiting the filter.
  • the debris trap can be a membrane filter fitted into a flexible or rigid frame, a bag filter in a rigid or flexible frame, sand or glass filter cartridges fitted into a flexible or rigid frame.
  • This debris trap can be either disposable after one or a limited number of uses, or manually cleanable in situ, or after removal from the filtration system.
  • the debris trap can be housed integral to the existing pump and filtration system of the body of water, for example included in the pump housing. Alternatively, the debris trap can be housed separately to the existing system and connected in fluid communication with the system.
  • the debris trap can comprise a single trap arrangement, or multiple arrangements, for example a number of filter bags in multiple housings in series. This configuration can be considered for more heavily soiled filtration medium.
  • the debris trap is in fluid communication with the filter including filter medium. This allows fluid, preferably water, to flow through the filter medium and through or over the debris trap to capture debris from the filter medium.
  • the fluid communication can be reversible attachment of an inlet of the debris trap to an outlet of the filter by any practicable means. For example, an existing backwash hose can be used to connect a debris trap inlet to the filter outlet.
  • the water exiting the debris trap can be directed to an inlet in the filter, enabling recirculation of the water and further debris removal.
  • the substantially debris-free water can ultimately be returned the body of water after any number of recirculation passes through the debris trap and the filter medium.
  • the debris trap can be connected to an inlet on the filter by any practicable means, including a hose attached to the debris trap outlet and filter inlet.
  • the debris trap ultimately directs the water exiting the debris trap back to the body of water.
  • This can be by any practicable means, such as a hose connected to the outlet of the debris trap.
  • Attachment of the hose can be by any practicable means, including screw attachment, clamp attachment, and pressure attachment.
  • the flow of the fluid can be directed and controlled by valves in the system. Any practicable valve can be used to control the flow of fluid from the body of water to the filtration medium; from the filtration medium to the debris trap or back to the body of water.
  • the invention therefore provides a method and system for backwashing filter medium which eliminates wastage of water.
  • the water used to backwash the filter medium is re-filtered in situ, and returned to the body of water. No water is lost or discarded in the method of the invention. Soil and public waterworks contamination, and water wastage is avoided.
  • the invention is therefore highly advantageous, and economically and environmentally beneficial.
  • FIG. 1 is a perspective view of a backwash system according to an embodiment of the invention
  • FIG. 2 is a front view showing conventional operation of a backwash system
  • FIG. 3 is a front view of a backwash system and method of the invention.
  • FIG. 1 shows a system (101) of the invention, comprising a pump housing (102) including debris trap (not visible) connected by piping (104) and (1 12) to a filter unit (105) with filter medium (not visible), which is connected by piping (106) to a sanitation unit (107).
  • the debris trap is included in the pump housing (102).
  • the debris trap can also be included in the system as a separate unit, which can be in communication with the system, or isolated therefrom.
  • FIG. 2 conventional operation of the system (201) is depicted in filter mode, with direction of water movement shown as arrows in the piping (204), (206).
  • Water from the swimming pool (208) enters the system through the pump (202), is pumped through piping (204) into the filter (205) where debris is removed from the water and accumulates in the filter medium.
  • the water is directed through the filter medium (not visible), through piping (206) to the sanitation unit (207), and returned to the swimming pool (208).
  • Conventional backwashing would entail connection of a separate hose to an outlet on the filter housing containing the filter medium, reversal of the flow of water through the filter medium to force removal of the debris in the filter medium, and discarding the water including debris down a drain to sewage, or typically storm water drains, or onto surrounding ground.
  • FIG. 3 shows the backwash method of the invention.
  • Water from the swimming pool (308) enters the system through the pump (302). Further water entry is then arrested by closing valve (309).
  • Water exiting from the system through pipe (306) is arrested by closing valve (310).
  • the resultant loop recirculates water through the pump (302) and pipe (304), into the filter (305), through the filter medium in the reverse direction to conventional operation, forcing debris which has accumulated in the filter medium to exit the filter (305) at the outlet (311) with the water.
  • the water containing the debris is then pumped through pipe (312), through the debris trap (not visible) in the pump housing (302) where substantially all or all of the debris is trapped by the debris trap.
  • the water is thereafter redirected through the filter (305) and filter medium to effectively remove any remaining debris.
  • valve (310) is opened and the debris-free water is directed through pipe (306),. through the sanitation unit (307), and returned to the swimming pool.
  • the pump housing (302) can be opened and the debris trap removed, cleaned and returned to the housing, or replaced if disposable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Architecture (AREA)
  • Water Supply & Treatment (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filtration Of Liquid (AREA)

Abstract

La présente invention a pour objet un système de lavage à contre-courant pour un corps de fluide comprenant un filtre comprenant un milieu filtrant et un piège à débris pour la capture de débris à partir du milieu filtrant, le piège à débris étant en communication fluidique avec le filtre, et un procédé associé de lavage à contre-courant d'un milieu filtrant contaminé, comprenant les étapes consistant à faire traverser le milieu filtrant à un fluide provenant d'un corps de fluide pour produire un milieu filtrant contaminé; à faire traverser le milieu filtrant contaminé au fluide pour éliminer les débris du milieu; et à capturer les débris éliminés dans un piège à débris.
PCT/AU2012/000570 2011-05-20 2012-05-21 Système pour lavage à contre-courant WO2012159158A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2011901981A AU2011901981A0 (en) 2011-05-20 System for backwashing
AU2011901981 2011-05-20

Publications (1)

Publication Number Publication Date
WO2012159158A1 true WO2012159158A1 (fr) 2012-11-29

Family

ID=47216448

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2012/000570 WO2012159158A1 (fr) 2011-05-20 2012-05-21 Système pour lavage à contre-courant

Country Status (1)

Country Link
WO (1) WO2012159158A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3096982A1 (fr) * 2019-06-10 2020-12-11 Abpool Dispositif de traitement de l'eau d'un bassin et procédé associé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138552A (en) * 1961-04-18 1964-06-23 John A Richards Means for backwashing a filter bed
US20100320159A1 (en) * 2007-02-09 2010-12-23 Lee Douglas W Method and device for cleaning non-fixed media filters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138552A (en) * 1961-04-18 1964-06-23 John A Richards Means for backwashing a filter bed
US20100320159A1 (en) * 2007-02-09 2010-12-23 Lee Douglas W Method and device for cleaning non-fixed media filters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3096982A1 (fr) * 2019-06-10 2020-12-11 Abpool Dispositif de traitement de l'eau d'un bassin et procédé associé

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