Abstract:
The invention relates to a method for flushing particle-bearing filter beds which are located in circuit or linear water-treatment plants, to sterilise and decontaminate said beds. The method is characterised in that an aqueous solution containing chlorine oxide and/or halogen and/or peroxide is left to act on the deposits of the particle-type filter bed and said bed is subsequently flushed with water or an aqueous medium, to remove the reaction products caused by the aforementioned process and any residual chlorine oxides or halogens or peroxides.
Abstract:
A fluid filter and a method of filtering flowing fluid so as to remove undesirable particulates and bacterial constituents, the method comprising providing an enclosed channel for fluid flow and passing the fluid flow through a filter material, disposed within the channel and in the fluid flow path, the filter material comprising a metal alloy consisting primarily copper and zinc and further comprising a metal fiber wool consisting of metal fibers having an average diameter from 12 microns to 150 microns, contact of the fluid with the fibers of the metal fiber wool providing a bactericide effect and inhibiting further propagation of bacteria and particulates from flowing through the filter material. In a radial-flow filter comprising multi-perforate pipe and a plurality of overlapping layers of strip of fibrous metal wool includes metal wool containing copper (Cu). The a multi-perforate shell may have an inner diameter approximately equal to the outer diameter of the outermost layer of wool and a tubular metal mesh encompassing the exterior of the pipe between the pipe and the innermost layer of metal wool, the tubular mesh being a woven mesh of stainless steel. The metal of the fiber wool layers is a brass alloy having between 50 to 90 weight % copper and from 10 to 50 weight % zinc, a preferable density in a range between 0.4 g/cm3 to 2.5 g/cm3, a more preferred density in a range between 0.5 g/cm3 and about 1.5 g/cm3 and a most preferred density approximately 0.8 g/cm3.
Abstract translation:流体过滤器和过滤流体流体以消除不期望的微粒和细菌成分的流体过滤器和方法,该方法包括提供用于流体流动的封闭通道并使流体流通过过滤材料,该过滤材料设置在通道内并且在流体流动路径 过滤材料包括主要由铜和锌组成的金属合金,并且还包括由平均直径为12微米至150微米的金属纤维组成的金属纤维棉,所述流体与提供杀菌剂的金属纤维羊毛的纤维接触 影响和抑制细菌和微粒进一步繁殖流过过滤材料。 在包括多穿孔管的径向流过滤器和多个纤维金属棉条的重叠层包括含有铜(Cu)的金属棉。 多孔外壳可以具有大致等于羊毛最外层的外径的内径和在管和最内层的金属羊毛之间包围管的外部的管状金属网,管状网是 不锈钢编织网。 纤维羊毛层的金属是黄铜合金,其具有50至90重量%的铜和10至50重量%的锌,优选密度在0.4g / cm 3至2.5g / cm 3的范围内,更优选的密度 在0.5g / cm 3至约1.5g / cm 3之间的范围内,最优选的密度约为0.8g / cm 3。
Abstract:
An improved sintered porous thermoplastic filter incorporating a second thermoplastic treated with a non-leaching antimicrobial agent for the purification of liquids. The method of making the filter is also disclosed.
Abstract:
A device/apparatus for using a multilayer fabric of varying deniers for the processing and treatment of fluids which must be treated to remove materials so that the resultant treated fluid may be reused and/or returned to the earth and particularly to the water table. More particularly the multilayer fabric, each layer being of selected denier, is used in combination with conduit in a drainage field or leaching system usually associated with a septic tank or septic system. Most particularly the multilayer fabric of varying deniers is wrapped around corrugated plastic pipe of the type well known in the field of drainage or leaching fields. At least one of the multilayer fabric layers is formed from an unstructured assemblage of fibers. The unstructured assemblage of fibers are supported by an outer sheeting. Oils, greases and chemicals contained in the fluids to be treated and entering within the fluid conducting conduit structure are entrapped within at least one of the first layers and at least one additional layer of fabric and particularly on the unstructured assemblage of fibers. The unstructured assemblage of fibers provides a large surface area whereon consequent biodegradation of said oils, greases and chemicals takes place permitting treated fluid to pass omnidirectionally through the unstructured assemblage of fibers and subsequently leach into the ground. The particular objectives, features and advantages of the device are: 1) Multiple layers of fabric; 2) Fabric layers of varying deniers; 3) Useful in wrapping corrugated plastic pipe; 4) With the selection of fabric and fabric denier, specific fluid treatment objective can be met; 5) The multilayer fabric provides boundaries/interfaces and regions within which specifically chosen bacteria, chemicals, microbes and the like may be introduced to facilitate the biodegradation of specifically chosen undesirable materials; and 6) Improve performance over the currently known leach fields.
Abstract:
An antimicrobial filter cartridge having a perforated core member wrapped with a first microporous membrane, which is in turn overwrapped with second and third microporous membranes. The membranes are covered with a criss-cross wrapping of antimicrobial treated yarn. The filter cartridge is sized so as to fit tightly into a cartridge housing of a fluid filtration system. Fluid passing through the cartridge housing will be filtered by the filter cartridge to remove microorganisms from the water and which prevents the growth of bacterial and other microorganisms on the filter media.
Abstract:
A method and apparatus for testing the integrity of filter elements is provided. The filter assembly comprises a plurality of filter elements which are subdivided into a plurality of sections. By measuring the gas flow rate under known pressure conditions through all of the sections or a selected portion of the sections, defective filter elements can be isolated in a systematic manner.
Abstract:
A method of improving the operation of backwashable fixed beds formed of granular materials and used during purification of waste water of sewage or during water treatment, wherein the fixed bed is conditioned during a last step of the backwashing operation by filling the fixed bed with a liquid for a predetermined time duration. The liquid contains distributed as uniformly as possible therein at least one substance which in the presence of a catalytically triggered decomposition reaction gives off a gaseous component and thereafter the liquid to be treated is filtered.
Abstract:
A method of improving the backwashing of fixed beds formed of granular materials and used during waste water purification or water treatment, wherein the fixed bed, during the course of the backwashing thereof, is maintained during a predetermined time duration filled with a quiescent liquid. This liquid contains at least one substance which is distributed as uniformly as possible therein. In the presence of a spontaneous, catalytically triggered decomposition reaction, this substance releases a gaseous component. Then, the fixed bed is backwashed with water.
Abstract:
A filtration system is provided that directs a fluid to be filtered through a disposable tubular filtration element, supports the filtration element, and accommodates for "wet growth" of the filtration element. The system operates with an inside-to-outside forced fluid flow through the filtration element and includes a generally cylindrical housing with a fluid inlet and outlet. A perforated outer support screen is mounted within the housing and surrounds the walls of the tubular filtration element with slight clearance. Under the influence of the fluid pressure and the wet growth, the walls of the filtration element bear against the screen. A sealing and support assembly having upstream and downstream fluid guides, each carrying, in a preferred form, a pair of resilient sealing members, is positioned inside the filtration element. A rigid inner member bridges the opposing faces of the resilient member pairs. A rod and nut arrangement draws the flow guides towards one another to apply a longitudinal compressive force on the resilient members caught between a flange on the flow guides and the rigid inner member. This compressive force deforms the resilient members in a radially outward direction to seal the filtration element to the housing and isolate the filtered fluid. In a preferred form, the adjacent faces of each pair of resilient members are aligned with the interior edge of an impregnated end portion of the filtration element. In addition, a tubular prefiltration element may be positioned inside the rigid inner member.
Abstract:
919,470. Filters. BERLINE J. R. A. July 25, 1961 [July 27, 1960], No. 26925/61. Class 46. In a cluster of filtering tubes each tube 1 has a flared upper end supported by an annular rubber or plastic gasket 18 in a supporting plate 16 and is held under adjustable pressure from bolts 21 in washers 20 which, through tube retaining rings 19, exert pressure against a plurality of tubes simultaneously. Each tube consists of a core 2 of perforated sheet metal or expanded metal and a sheath 5 of metal or synethetic fabric e.g. " Terylene " Registered Trade Mark and is rigidly united with an endpiece 4 which is secured to a metal lattice 6 by a stud 8. For cleaning, filtrate accumulated in a dome of the filter housing is counterstreamed by the pressure of gas in the dome, or introduced thereto, and this with the help of the resultant vibration of the tubes, causes the filter cake on the outer face of the filter fabric to be removed. Alternatively, steam under pressure may be used to clean the tubes. The washers may be circular or star-shaped, each point of a star being assigned to a tube.