Abstract:
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.
Abstract:
The invention relates to a method for cleaning filter structures of filtration installations for filtering liquid products containing a gas or gas mixture that is neutral to the product, in particular for filtering drinks containing the gas or gas mixture that is neutral to the product.
Abstract:
An SBX assembly comprising an ultrafine screen; a three-dimensional screen frame supportive of the screen and sealed along the screen edges to prevent liquids and solids from bypassing the screen; and an air plenum attached to the frame that provides air scouring at the lowest elevation of the screen. The air plenum is attached to the lower region of the SBX. The plenum is supplied from a source of compressed air and is provided with a plurality of exit holes. Air exiting the plenum flows along the upstream surface of the SBX screening below the level of liquid in the primary settling tank, thereby scouring accumulated residues from the screening surface. Upon reaching the liquid surface, the bubbles migrate horizontally away from the SBX assembly and toward one or more nearby scum troughs in the primary settling tank.
Abstract:
Method and apparatus are provided for treating and removing particulate matter from fluid or treating and removing fluid from a recoverable particulate matter from fluid circulating into, through and out of an industrial operation, and for washing a disposable cartridge filter used therein. The influent fluid is maintained at a flow rate such that the differential pressure across the cartridge filter is no greater than 10 psi to prevent the buildup of non-porous filter cake. A pressure detecting mechanism and method is also provided to detect the amount of deposited particulate matter inside the cartridge filter, so that an operator can determine whether the cartridge filter should be taken out to remove or recycle the deposited particulate matter.
Abstract:
The present invention discloses a system and method for self-cleaning filters without having to open the filter housing. Wash nozzles are integrated with the filter housings such that when the filters are clogged, both back-wash and regular washing can be performed with practically no down time. Moreover, without opening the filter housing, the hazardous components of the fluid to be filtered can be contained and dealt with before they escape the filter housing, thereby significantly reduces the environmental impact and harm to the working crew.
Abstract:
Systems for filtration are disclosed. A feed mixture including at least one liquid component and at least one solid component and a flow of gas may be directed to a filter element and filtrate and gas may be passed through a filter medium from a feed fluid side to a filtrate side.
Abstract:
The present invention relates to a horizontal rod-supported, pore-controllable fiber media filter comprising: a fiber support comprising fixing supports to stand at both sides thereof and a plurality of horizontal rods which are coupled rotatably to the fixing supports in a zigzag pattern at intervals in a lengthwise direction of the fixing supports; a fiber media which hangs on the horizontal rods of the fiber support in a zigzag pattern, in which the lower end of the fiber media forms a fixed end attached to the lower end of the fiber support, and the upper end of the fiber media forms a free end at the upper end of the fiber support; and an actuator which is coupled to the free end of the fiber media to pull or relax the fiber media supported by the fixed end.
Abstract:
The filter device is utilized for the separation of undissolved solid substances from liquids, in particular in the fields of waste water purification and water treatment. The filter device is arranged in a container as capable of rotation (2) and surrounded by the liquid to be filtered. The filter device (1) consists of several filter elements (6) with a space between one another, which are combined to form a rotating filter. The filtrate is drained away at the periphery of the filter elements (6). Solid substances are prevented from adhering to the filter elements (6) during the filtering process. The rotating filter comprises a hollow space in the center and an aeration device (8) is arranged in the hollow space, around which the filter device rotates. The filters are continuously cleaned by the mixture of air and liquid flowing through during the filtering process.
Abstract:
The present invention provides a gravity fiber filter, comprising: a filter tank placed in a portion of a large amount of running water; at least one unit filter disposed in the filter tank; a filtered water collecting tank disposed in a lower portion of the filter tank; a discharging pipe extended from the filtered water collecting tank to the height lower than a influent inlet of the filter tank, so that the height of the extended discharging pipe is defined as a height of starting filtration; a sensor; a air inflow pipe through which a backwash air flows in from outside to a lower portion of the filter tank; a control means controlling the operation of filtering and backwashing; and backwash water discharging pipe.
Abstract:
A filter cartridge including a frame that is formed of one or more fluid conductive members and has a fluid outlet and a plurality of spaced inlets; and a flexible fabric material that allows the flow of water therethrough, the flexible fabric material being connected to the frame in a manner defining an internal zone, whereby substantially all fluid entering the internal zone from an opposite side of the flexible fabric material passes therethrough; wherein, upon connection of the fluid outlet to a fluid intake system, fluid is drawn through the flexible fabric material into the internal zone, thereby filtering the fluid, and filtered fluid is drawn through the plurality of spaced inlets and passes to the fluid outlet for delivery into the fluid intake system. A system and method for filtering fluid intake are disclosed.