Class / Patent application number | Description | Number of patent applications / Date published |
210792000 | Particulate bed | 27 |
20100078394 | FILTER UNITS - A filter unit includes a flexible bag having permeable material on a first side and a second side that allows fluid to pass through the container. Granularized rubber is enclosed within the flexible bag. The granularized rubber filters hydrocarbon products from the fluid. | 04-01-2010 |
20100140188 | MAINTAINING WASTEWATER-TREATMENT SAND FILTERS - A downflow sand filter used for treating wastewater which has degraded in function from its original design is at least in part rejuvenated by flowing air downwardly through the bed during time when flow of wastewater is ceased. The low velocity air flow helps dewater the bed and leads to the removal of accumulated organic material which has clogged the pores of the bed. In accord with different embodiments, air flow is alternated with water flow in particular ways, for instance, so the water flow is sufficient to create ponding or is sufficient to maintain moisture content within the bed. | 06-10-2010 |
20100320159 | METHOD AND DEVICE FOR CLEANING NON-FIXED MEDIA FILTERS - A method and apparatuses are presented for rejuvenating a bed of granular filter medium that has accumulated contaminants during filtration of a liquid stream. The method first includes the step of establishing a small volumetric flow rate of clean filtrate in reverse flow. Then, the filter media is agitated to break-up contaminants that have become agglomerated on the surface of or within the interstitial spaces of the filter media. The agitating step is accomplished by exposing the liquid-full filter media to a jetting stream comprised mostly of a gas mixed with a clean liquid. The jetting stream is dispersed throughout the filter media through a plurality of radial nozzles located within the filter bed. The radial nozzles disperse the gas within the liquid and filter media causing sufficient turbulence and agitation of the filter media granules to liberate the trapped contaminants without the need for high liquid flow rates. The number of nozzles and their placement within the filter bed are varied depending on factors such as size and shape of the filter vessel and the type of filter media being cleaned. The amount of water and gas flowing through the nozzles is also adjusted to provide substantially uniform cleaning of the entire bed. This method results in lower volumes of clean filtrate being consumed in the backwash cycle and the associated storage and recycle of that liquid back into the process. The radial nozzles are each comprised of two horizontal and parallel circular disks spaced apart to create a cylindrical void through which the pressurized gas and liquid jetting stream flows. The apparatuses presented are a singular filter vessel an a plurality of filter chambers within a common filter vessel each containing granular filter media and a plurality of radial nozzles disposed with the media for dispersing the jetting stream throughout during the cleaning and rejuvenation steps of a filtering process. | 12-23-2010 |
20120031857 | FILTRATION APPARATUS AND METHOD FOR TREATING GRANULAR FILTRATION MEDIUM - Apparatuses and related methods for filtration of raw water including a filtration column having a filtrate zone and a filtration zone. | 02-09-2012 |
20120211444 | METHOD OF WASHING A PARTICULATE FILTER BED USING AN UNDERDRAIN - An apparatus for filtering water and/or wastewater including at least one underdrain lateral having a primary gas chamber and a secondary gas chamber where the secondary gas chamber serves to equalize pressure differences that may occur during the initial distribution due to velocity head changes and friction effects. Preferably, the underdrain lateral includes a plurality of chambers directing a washing fluid into the filter bed where at least one of the plurality of chambers directs a liquid and a gas simultaneously into the filter bed and at least one other chamber of the plurality of chamber directs only one of a liquid and a gas into the filter bed at the same time as that the combination of liquid and gas is directed into the-filter bed. | 08-23-2012 |
20140027389 | Method and System for Recovering Oil and Removing Oil From a Resulting Oil-Water Mixture - A filtering device comprises a vessel for containing filtering media such as nutshells. Associated with the filtering device is an eductor for scrubbing and cleaning the media and removing contaminants such as oil from the media. The eductor includes an inlet port for receiving a motive liquid. Further, the eductor includes an inlet port for receiving media held in the vessel. In operation, a motive liquid is directed into the eductor and this induces media in the vessel into the eductor. By continuously directing motive liquid from an external source into the eductor, this results in the media being fluidized and circulated and recirculated through the eductor, giving rise to a slurry that contains liquid, the media and removed contaminants. A portion of the slurry is discharged from the filtering device while the media is retained in the filtering device. | 01-30-2014 |
20140246388 | METHOD FOR THE TREATMENT OF WATER AND WASTEWATER - A method and a plant for the treatment of water or wastewater having impurities by filtration of the water through two granular media filter stages of the moving bed type operated in series. The method includes the steps of feeding the water/wastewater as a first influent to first stage granular media filters; filtration of the first influent in the first stage granular media filters to produce a first effluent; feeding the first effluent as a second influent to second stage granular media filters; and filtration of the second influent in the second stage granular media filters to produce a second effluent. The second stage granular media filters are operated with intermittent washing of the granular filter media. | 09-04-2014 |
20150068988 | APPARATUS FOR REMOVING IMPURITIES FROM WATER OR WASTEWATER AND A METHOD OF INSTALLING A FLUID DISTRIBUTION SYSTEM THEREIN - An apparatus for removing impurities from water and/or wastewater and a method of washing a filter having a filter bed for filtering water or wastewater. In the most preferred form of the invention, the fluid distribution system is an air scour system for directing air through the filter bed to assist in cleaning of the filter bed to remove impurities trapped in the filter bed during a service run. In the most preferred form, the air scour system includes an adapter for permitting adjustment of at least one component of the air scour system during installation. | 03-12-2015 |
210793000 | Reverse flow | 18 |
20090277848 | Water recycling apparatus and method - A water recycling tank | 11-12-2009 |
20090277849 | BIOLOGICAL CLEANING FILTER APPARATUS AND SYSTEM FOR AQUA-CULTURE - A filter apparatus may be provided. The filter apparatus may include a multi-port valve; a strainer coupled in flow communication to the multi-port valve, wherein the strainer may include a conical portion and an attachment portion extending away therefrom; a diffusing column coupled to the strainer and coupled in flow communication to the multi-port valve; and an equalizer column coupled in flow communication to the strainer. | 11-12-2009 |
20100102010 | Vortex generator for a fluid filter - A vortex generator for use in a fluid filter operable in both a normal filtering mode and a back flushing mode. The vortex generator including a flapper valve that moves between an open position and a closed position in correspondence to the direction of fluid flow through the fluid filter. In the open position, fluid is permitted to flow through openings formed in a base of the vortex generator. In the closed position, fluid is prevented from flowing through the openings. | 04-29-2010 |
20110073549 | Clog Resistant Media Retainer Assembly - A media retainer assembly for retaining filter media in a filter assembly includes a top plate for supporting the filter media, the top plate having a top surface, a bottom surface and a plurality of openings extending therethrough; a bottom plate having a top surface and a plurality of openings extending therethrough; and scouring media, the scouring media being adapted to abrade the surfaces of the top and bottom plates. The top plate is connected to the bottom plate such that the top surface of the bottom plate is spaced from the bottom surface of the top plate to define at least one chamber between the top plate and the bottom plate. The top surface of the top plate is in fluid communication with the chamber via the openings in the top plate. The scouring media is supported by the bottom plate within the at least one chamber. | 03-31-2011 |
20110147321 | FILTER WITH ADJUSTABLE POROSITY - A filter includes a filter chamber of adjustable volume. The filter chamber encloses a compactable filter medium through which fluid to be filtered may flow. The filter medium includes a plurality of filter particles. A filter particle has an initial shape and is deformable upon application of a deforming force, being capable of substantially regaining its initial shape upon removal of the deforming force. The porosity of the filter medium is adjustable by adjusting the volume of the filter chamber so as adjust the compaction of the filter medium. | 06-23-2011 |
20130168331 | Means for Cleaning Packed Media In a Wastewater Filter Treatment System - A highly efficient means for progressively backwashing and fluidizing filter media in packed media filtration systems utilized for removing contaminants from wastewater is disclosed. The means is suited for use with a generally unsaturated filter with air and water flowing concurrently in a downward direction during treatment. During periodic backwashing, a pump provides treated wastewater from a holding tank to an underdrain and a pressurized water jet configured as an eductor within the filter vessel to progressively fluidize, backwash and redistribute the media. Fluidized media flow induced by the water jet is turbulently transported to the top of the filter vessel in an upflow pipe, wherein excess biofilm is scoured from the media. Scoured biofilm leaves the filter with backwash water through an overflow conduit and an exit port. Backwashing removes excess solids caught in the filter media and controls the biofilm thickness and the nature of the biofilm. | 07-04-2013 |
20140001128 | Backwash Reclamation Method | 01-02-2014 |
20160002941 | HIGH EFFICIENCY, LOW-PRESSURE FILTRATION UNIT - A swimming pool water filtration unit includes: a plurality of shallow-bed sand filter modules that receive water from a swimming pool and discharge filtered water simultaneously via a pool water return conduit common to all modules. A valve arrangement associated with the filter modules: (i) selectively but simultaneously switching on and off of all filtered water flow from the trays, which takes place through the return conduit common to all trays, to the pool water return coupling of the tank; and (ii) enable backwash water flow into the individual filter trays in selectable order, preferably through the common return conduit, and opens a conduit for backwash water to pass to waste in a switching state where water flow to the pool water return coupling is blocked. | 01-07-2016 |
20160051908 | FILTER APPARATUS AND METHODS FOR PROVIDING BOILER FEED WATER - A filter apparatus includes an intake conduit that receives intake water. A bypass conduit receives intake water from the intake conduit in a filtering mode. A first discharge conduit receives intake water from the bypass conduit and discharges intake water to a waste receptacle in the filtering mode. A filter device receives intake water from the intake conduit in the filtering mode. The filter device removes suspended solids from intake water in the filtering mode. A second discharge conduit receives filtered water from the filter device in the filtering mode. The second discharge conduit discharges filtered water to a water receptacle in the filtering mode. The filter device receives water to remove suspended solids from the filter device in the backwashing mode. The first discharge conduit receives water and suspended solids from the filter device and discharges water and suspended solids to the waste receptacle in the backwashing mode. | 02-25-2016 |
210794000 | Including addition of diverse fluid | 9 |
20090071914 | Underdrain for a filter system for filtering water or wastewater and a method of washing the filter system - An apparatus for filtering water and/or wastewater including at least one underdrain lateral. The underdrain lateral is configured to receive a liquid during a filtration cycle and directs a washing fluid through a filter bed of one or more layers of filter media during a washing cycle. The filter can take any form including but not limited to an upflow clarifier, an upflow filter, a downflow clarifier, a downflow filter and a bi-flow filter. The filter media may be supported by one or more layers of gravel. Alternatively, a porous plate can be attached to the underdrain lateral in place of the gravel layers. The washing cycle can be a liquid only wash, a gas only wash, a combined liquid and gas wash or a combination of any of the aforementioned wash cycles. Preferably, the underdrain lateral includes a primary gas chamber and a secondary gas chamber where the secondary gas chamber serves to equalize pressure differences that may occur during the initial distribution due to velocity head changes and friction effects. Preferably, the underdrain lateral includes a plurality of chambers directing a washing fluid into the filter bed during a washing cycle where at least one of the plurality of chambers directs a liquid and a gas simultaneously into the filter bed and at least one other chamber of the plurality of chamber directs only one of a liquid and a gas into the filter bed at the same time as that the combination of liquid and gas is directed into the filter bed. Preferably, the height of evacuation openings formed in at least one wall common to a gas wash chamber and at least one adjacent chamber are varied to compensate for velocity head or friction loss. | 03-19-2009 |
20100213143 | Apparatus for Inhibiting Fines Carryover - Apparatus for inhibiting fines carryover in the form of a settlement tank comprising: a filter which divides the tank into upper and lower portions; a fluid inlet in the lower portion for admitting into the tank a fluid with entrained solids; and a fluid outlet in the upper portion through which filtered fluid can leave the tank. The filter comprises filter media supported on a permeable wall, the wall including a filter media outlet which is normally closed, and opening means for opening the filter media outlet to allow the filter media to discharge into the lower portion of the tank. The invention also relates to a method of refilling the filter with filter media. | 08-26-2010 |
20110163049 | Water Treatment Apparatus and System - The present invention relates generally to a system and method for treating wastewater in a filter media apparatus having a draft tube system. The filter media may be walnut shell media. | 07-07-2011 |
20140166593 | Gas-Liquid Distribution Technique for Water or Wastewater Filters Using Underdrains - A method of distributing gas and liquid through an underdrain system includes: a) positioning an underdrain system on a filter floor, the underdrain system comprising at least one underdrain block and filter media positioned on top of the underdrain block; b) distributing gas sufficiently evenly through the underdrain system at a rate of less than 2 scfm/ft | 06-19-2014 |
20140190907 | UPPER-LAYER CLEANING DEVICE FOR WATER TREATMENT DEVICE, AND METHOD FOR CLEANING WATER TREATMENT DEVICE FILTER LAYER - Water treatment apparatus includes raw water special air mixing nozzles ( | 07-10-2014 |
20140190908 | CONTINUOUS CIRCULATION SAND FILTER AND CONTINUOUS CIRCULATION SAND FILTERING METHOD - Provided is a continuous circulation sand filter including a filtering barrel filled with a sand filtering layer, an inflow tube for introducing raw water into the filtering barrel, a treated water discharge part for discharging treated water purified by passing the raw water through the sand filtering layer from a lower end of the sand filtering layer to an upper end thereof, an air lift tube for transferring contaminated sand, located in the lower end of the sand filtering layer, from a lower part of the filtering barrel to an upper part thereof, a transfer water discharge filter contacting the air lift tube to discharge transfer water moved upward together with sand through the air lift tube and trap the sand and a foreign substance, a descent guide tube downwardly moving the sand and the foreign substance moved to the upper part of the filtering barrel through the air lift tube, and a foreign substance separation tube suctioning the downwardly moving foreign substance to remove the foreign substance from the downwardly moving sand, and discharging the foreign substance. | 07-10-2014 |
20150008195 | METHOD FOR WASHING A FILTER HAVING AT LEAST TWO LAYERS OF FILTERING MEDIA, IN PARTICULAR FOR FILTERING SEAWATER, AND EQUIPMENT FOR IMPLEMENTING SAID METHOD - The invention relates to a method for washing a filter (F) having at least two layers of filtering media ( | 01-08-2015 |
210795000 | Expanded bed | 2 |
20110174746 | Water Treatment Methods - The present invention relates generally to a system and method for treating wastewater in a filter media apparatus having a draft tube system. The filter media may be walnut shell media. | 07-21-2011 |
20150068989 | APPARATUS FOR REMOVING IMPURITIES FROM WATER OR WASTEWATER AND A METHOD OF INSTALLING A FLUID DISTRIBUTION SYSTEM THEREIN - An apparatus for removing impurities from water and/or wastewater and a method of installing a fluid distribution system in the apparatus. In the most preferred form of the invention, the fluid distribution system is an air scour system for directing air through the filter bed to assist in cleaning of the filter bed to remove impurities trapped in the filter bed during a service run. In the most preferred form, the method of installing the fluid distribution system in the filter bed is performed by imparting a force to the filter bed to permit the fluid distribution system to be installed in the filter bed without removing media. The fluid distribution system is preferably configured to permit the fluid distribution system to be readily installed in the filter bed and at an optimum orientation. | 03-12-2015 |
210796000 | Includng mechanical agitation | 1 |
20140166594 | EXTERNAL DEVICE FOR CLEANING FILTRATION MATERIAL AND ADAPTED FOR APPLICATION TO FILTRATION DEVICE - An external device for cleaning a filtration material is applied to a filtration device for filtering a supplied unfiltered liquid by layers of a filtration material to remove muddiness in the liquid and discharging the cleaned liquid to the outside. The cleaning device has an upstanding outer tube, a screw conveyor rotatably placed in the outer tube and transferring the filtration material upward from the lower rod to the upper end of the outer tube while rub-washing the filtration material, a drive section for rotationally driving the screw conveyor, a control section for controlling rotation of the drive section, and a discharge tube for discharging the filtration material having been rub-washed, into a filtration container from the inside of the outer tube and an introduction tube that introduces the filtration material into the outer tube. | 06-19-2014 |