9173results about How to "Improve filtration efficiency" patented technology

A composite filtration medium web of fibers containing a controlled dispersion of a mixture of sub-micron and greater than sub-micron diameter polymeric fibers is described. The filtration medium is made by a two dimensional array of cells, each of which produces a single high velocity two-phase solids-gas jet of discontinuous fibers entrained in air. The cells are arranged so that the individual jets are induced to collide in flight with neighboring jets in their region of fiber formation, to cause the individual nascent fibers of adjacent jets to deform and become entangled with and partially wrap around each other at high velocity and in a localized fine scale manner before they have had an opportunity to cool to a relatively rigid state. The cells are individually adjusted to control the mean diameters, lengths and trajectories of the fibers they produce. Certain cells are adjusted to generate a significant percentage of fibers having diameters less than one micron diameter, and which are relatively shorter in length and certain other cells are adjusted to generate a significant percentage of structure-forming reinforcing fibers having diameters greater than one micron diameter which are relatively longer in length. By employing appropriate close positioning and orientation of the cells in the array, the sub-micron fibers are caused to promptly entangle with and partially wrap around the larger reinforcing fibers. The larger fibers thereby trap and immobilize the sub-micron diameter fibers in the region of formation, to minimize the tendency of sub-micron diameter fibers to clump, agglomerate, or rope together in flight. Also, the larger fibers in flight are made to form a protective curtain to prevent the sub-micron fibers from being carried off by stray air currents.

Fluted filter media includes filter material having a plurality of flutes formed therein having alternating ends of adjacent flutes closed to force fluid through filter material. A first embodiment of the filter media includes tapered flutes which have the open ends of the flutes larger in cross-section than the closed flutes, wherein the upstream open flutes converge toward the downstream end and the upstream closed end flutes diverge toward the downstream end. A second embodiment includes filter media which is asymmetric formed with dissimilar upstream and downstream flute cross-sections with larger flute openings to the upstream side of the filter. A third embodiment includes filter media with an upstream edge crushed to improve flow at the upstream edge. A fourth embodiment includes filter media with the upstream sealing material recessed from the upstream edge for reducing effects from blockages at the upstream edge of the filter.

A micro/ultrafiltering element (10) and method for making a filter element are provided. The filtering element comprises a multi-level support (26) having a filtering membrane layer (12) formed thereon comprising sintered particles (14) of uniform diameter. The filtering membrane preferably has an average pore size of from about 0.005-10 micrometers. The filter element is capable of being formed in a variety of geometrical shapes based on the shape of the porous support,

A filter element for reducing or eliminating the harmful vapor phase components of air or smoke. The filter element includes a first section and a second section. The first section is positioned relative to and in fluid communication with the second section and contains an activated carbon fabric. The second section contains a mixture of catalytic activated carbon and coconut activated carbon.

The invention relates to an electrospinning nano-fiber electret filtering material and its preparation method. The high-efficiency and low-resistsance nano-fiber electret filtering material having no interfibrous adhesion and having a fluffy three-dimensional netted intercommunication structure is prepared through controlling the component and the temperatures of a polymer solution in an electrospinning process and carrying out one-step forming in the nano-fiber forming rapid cooling process, wherein the gram weight of the above nanofiber layer is 0.01-70g/m<2>, and the porosity is not less than 80%. The surface electrostatic potential of the nano-fiber electret filtering material is 800-6000V, and the surface charges have lasting storage stability, the hydrophobic angle is greater than 150DEG, the filtering efficiency of the material to particles of 0.006-1[mu]m can reach above 99.999%, the piezoresistance is less than 20Pa, and the dust containing capacity is 300-3600g/m<2>. The preparation method is simple, and the filtering material has wide application prospects in the fields of individual protection mouth mask filtration, indoor air purification and filtration, and high efficiency/ultrahigh efficiency air filtration.

The present invention discloses a method and apparatus for separating particles and dissolved matter from a produced water fluid stream. Specifically, the present invention includes a first pressure source which transports untreated produced water or contaminated aqueous fluid into a separator annulus with a filter element disposed therein. The untreated fluid is placed under appropriate pressure sufficient to produce turbulent flow, increased particle kinetics and/or cavitation allowing the desired fluid to penetrate and pass into and through the filter media. The treated fluid is then transported to a collection tank. The contaminant matter retained by the filter media may be removed by the nearly instantaneous reverse pressurization of the separator annulus by a second pressure source thereby removing the contaminant particles away from contact with the filter media, and which may then be transported to a waste collection tank or a separator for further treatment.

A feedthrough terminal assembly for an active implantable medical device includes a conductive ferrule conductively coupled to a housing of the medical device, a feedthrough capacitor conductively coupled to the ferrule, an inductor closely associated with the capacitor in non-conductive relation, and a conductive terminal pin extending through the capacitor and the inductor. The terminal pin extends through the inductor in non-conductive relation and is conductively coupled to active electrode plates of the capacitor. In one preferred form, the terminal pin is wound about the inductor. Additionally, the inductor may be maintained in close association with the capacitor without forming a direct physical attachment therebetween.

A cordierite ceramic body having (i) a pore size distribution and a porosity which satisfy the relationship 10.2474/[(d50)<2>(pore fraction)]+0.0366183(d90)-0.00040119(d90)<2>+0.468815(1/pore fraction)<2>+0.0297715(d50)+1.61 639(d50-d10)/d50<=3.65, and (ii) a CTE (25°-800° C.) of <=15X10<-7>/° C., wherein the cordierite ceramic body is produced from a moldable mixture comprising cordierite-forming raw materials including (a) a fine talc having a median particle diameter, as measured by laser diffraction, of less than 10 micrometers, and a B.E.T. specific surface area of greater than 5 m<2>/g, and (b) a pore former. The cordierite ceramic body is suitable in the fabrication of cellular, wall-flow diesel particulate filters having a low pressure drop, high filtration efficiency and improved strength.

The present invention provides improved processes for recovering components of distillers' grain, such as, the components of distillers' dried grain (DDG), for use in various applications, including in the production of ethanol.

Provided is a composite fuel filter material which comprises (A) a support layer made of wet laid cellulose and/or synthetic fibers, (B) a barrier layer having wet laid glass fibers for providing increased efficiency to the filter material, (C) a thermosetting bonding agent dispersed through the composite and in an amount sufficient for bonding the composite into a strong, tear resistant and pleatable material, and (D) a water repellant agent dispersed in the composite for removing and coalescing water dispersed in a fuel to be filtered. In a preferred embodiment for a diesel fuel filter, the glass fibers have an average diameter of about 0.1 to 2.0 microns and the thermosetting bonding agent is an epoxy resin in the composite in an amount of between 1 and 5% by weight. A filter efficiency of at least 90% or even 99% can be achieved, along with a water removal of 90 to 99.9%. Preferably, the barrier layer has a small amount of synthetic fibers therein and an interface between the support layer and the barrier layer is mechanically interlocked.

The invention discloses a mixed plant culture medium and a preparation method thereof. The culture medium comprises peat and an agricultural and forest residue compositing fermentation medium, wherein the volume proportion of peat to agricultural and forest residue compositing fermentation medium is (30-50):(50-70). The mixed culture medium prepared by the method in the invention has the advantages of balanced nutrition, high nutrition component contents and stable physical property. The mixed culture medium prepared by the method in the invention is reasonable in nutrition structure and convenient for absorption of foliage plants and meets the growth requirement of the foliage plants, thereby improving the culture survival rate and viewing effect of the foliage plants.

An improved EMI shielded detection system. The disclosed system may include features configured to increase radio wave and microwave absorbance while retaining significant transparency at visible and/or infrared wavelengths, thus increasing EMI shielding efficiency. This may be accomplished through the use of a conductive mesh having appropriately chosen dimensions and spacing, and embedded in a transparent medium. To minimize the impact of the mesh on the effective aperture of the medium, the strands of the mesh may be made relatively narrow, and to provide sufficient shielding despite the narrow strand width, the mesh may be embedded relatively deeply in the medium.

The invention discloses a purification system of vent gas of diesel engine. The purification system of vent gas of diesel engine essentially consists of a wall-flow diesel particle filter (DPF) and a heating regeneration device used for regeneration of the wall-flow diesel particle filter (DPF). The heating regeneration device consists of an electronic control unit (ECU), a combustion chamber and an ignition system. The ignition system comprises a spark plug, a high voltage wire and an ignition coil, a combustion air generating device and relevant pipes, ejector components and pipes, an oil nozzle, relevant temperature and pressure sensor and other gas paths, a valve of oil circuit and an automatic protection device. Compared with the prior art, the invention is characterized by reliable regeneration, efficient purification and no restriction of the way vehicle driving, etc.

The invention discloses a fully-degradable polylactic acid fiber SMS compound non-woven and a manufacturing method thereof. The non-woven is compounded by three layers of non-woven by self-bonding or hot rolling, wherein the middle layer is polylactic acid meltblown non-woven, and the upper layer and the lower layer of the middle layer are both polylactic acid spunbonded non-woven. The SMS non-woven is even and has stable quality and excellent physical property, filtering property and shielding property. A thin SMS product has favourable waterproof permeability and is especially suitable for the fields of hygienic materials, packaging materials and the like; an SMS product with medium thickness is suitable for the disposable products of the field of medical treatments, and a thick SMS product is suitable for the field of industrial filtering. The production technology of the invention is easy to operate and control, has favorable stability and can carry out industrial production.

The invention belongs to the field of high polymer materials, and provides a long-acting electrostatic holding meltblown polypropylene electret and a preparation method and an application thereof. Themeltblown polypropylene electret provided by the invention contains blended master batch and meltblown polypropylene; the master batch contains a matrix material, an electret filler, a modifier, a dispersing agent, a coupling agent and an antioxidant, wherein the matrix material is polypropylene; the electrets filler is tourmaline and/or a fluorine-containing polymer, and the modifier is a nucleating agent. The meltblown polypropylene electret provided by the invention is obtained by adding the master batch into the meltblown polypropylene for spinning and by passing through a corona electrets, and the obtained meltblown polypropylene electrets material is stable in charge storage, high in filtering efficiency and high in temperature resistance.

A system is provided for proceeding with filtration of liquids in a manner having enhanced control characteristics. Yields are enhanced. The system and method can be used to maintain a substantially constant trans-membrane pressure. When desired, that constant trans-membrane pressure is especially well-suited to yield enhancement for the particular liquid being filtered, concentrated or collected, while minimizing a risk of damage to or loss of valuable components. Additionally, a constant feed rate or pump output can be maintained.

The invention discloses a filter material for cigarette filter and the preparation method. Based on the expanded cabo particles from <The Preparation Method of an Expanded Cabo Particles and Relevant Equipment> (Application No.: 200710065892.3), the expanded cabo particles are extracted, shaped and selected as so to become the required filter material. The filter material utilizes the waste in the cigarette production, which not only has significant economic benefits, but also is not necessary to be recycled, and will not cause the abrasion of equipment and affect the sensory quality of cigarette. The filter material is uniformly arranged on the filter tows so as to make a composite filter; as the composite is applicable to the cigarette, the smell of the cigarette will be more clear and soft, and the tar and nicotine content in the smoke gas can be reduced effectively. The invention has the advantages that: the operation is simple; the effect is remarkable, therefore the invention has a good applicable prospect.

The invention discloses a dust collecting unit of vacuum cleaner, which mainly comprises a first cyclone device for filtering the foreign bodies in air for first time, a second cyclone device used for filtering the foreign bodies in air passing through the first cyclone device for the second time, over three dust collecting cylinders of dust collecting chambers used for separating foreign bodies in the air collected, an upper surface cover used for covering the upper surface of the dust collecting cylinder and a lower surface cover used for covering the lower surface of the dust collecting cylinder. The invention has the advantages that: the foreign bodies in air absorbed from outside in the vacuum cleaner are double filtered through the flow of the cyclone, therefore, is can enhance the air purify capacity of the vacuum cleaner, namely the filtering capacity. The invention has three dust collecting chambers to collect the foreign bodies in air, thus the foreign bodies will be separated gradually, which improves the filtering efficiency; besides, the dust collecting cylinder is made of transparent material, which enables users conveniently confirm the foreign bodies quantity collected without needing to separating the dust collecting unit out from the cleaner body.

The invention provides permeable magnetically responsive filtration membranes that include a filtration membrane polymer base suitable for fluid filtration; hydrophilic polymers conjugated to the surface of the filtration membrane polymer; and magnetic nanoparticles affixed to the ends of a plurality of the hydrophilic polymers, wherein the hydrophilic polymers are movable with respect to the surface of the filtration membrane polymer surface in the presence of an oscillating magnetic field.

This invention relates to advanced composite filtration media comprising a functional filtration component and a matrix component, and methods for preparing and using same. More particularly, this invention pertains to advanced composite filtration media and advanced composite filtration media products comprised of a functional filtration component, such as a biogenic silica product (e.g., diatomite), a natural glass product (e.g., expanded perlite), or a natural or synthetic crystalline mineral (e.g., titanium dioxide), which is thermally sintered to a matrix component, such as an engineering polymer (e.g., glasses, natural or synthetic crystalline minerals, thermoplastics, and metals) or a suitable natural material (e.g., rice hull ash, sponge spicules) that has a softening temperature below that of the functional filtration component. This invention also relates to advanced composite media and advanced composite media products, generally, which are also useful in non-filtration applications.

The invention provides a modified polypropylene master batch, melt-blow cloth, a preparation method and an application thereof. The modified polypropylene master batch is mainly produced from, by weight, 77-90% of polypropylene, 5-20% of a graphene material and 1-5% of an additive. The graphene material includes any one or more of graphene, graphene oxide and graphene derivative. The additive includes any one or more of a coupling agent, a dispersant and an antioxidant and preferably includes the coupling agent, the dispersant and the antioxidant. The modified polypropylene master batch, when being used for manufacturing the melt-blow cloth, not only improves antibacterial and electrification property but also increases the filtering efficiency and dust capacity of the melt-blow cloth.