5 results about "Composite filter" patented technology

The invention discloses a composite biological filter for treating high algae-laden and high ammonia-nitrogen raw water and an application method thereof. An overflow pipe, a water inlet unit, a sampling opening, a carrier filling area, a water outlet unit and an aerating device are arranged on a composite biological filter body unit from top to bottom in sequence, and suspended spherical biological filter materials, zeolite filter materials, granular active carbon filter materials and a supporting layer are arranged in the carrier filling area from top to bottom in a graded mode. The composite biological filter has the advantages that the spherical biological filter materials can effectively enrich a biological film to remove nitrogen elements and other pollutants in polluted raw materials, algae can be synchronously removed through adsorption, mechanical entrapment and other functions of zeolite and activated carbon, the head loss of an aerating filter can be effectively reduced through a special composite filter material structure, and the back flush frequency is lowered. Meanwhile, the aerating mode, hydraulic retention time and other technological parameters are optimized, and fast biofilm culturing decontamination of the spherical biological filter materials and efficient and low-consumption stable running of a system are achieved.

The invention discloses a double-layer lapping-hole-free paper tube composite filter tip and forming equipment, and relates to the technical field of tobacco filter tips. The middle section of the filter tip formed by compounding double-layer lapping-hole-free paper tubes is provided with the double-layer lapping-hole-free paper tubes; lapping holes are formed by aligning the short edges and retracting the long edges of the paper tubes; the lapping holes are aligned to be in smooth transition by a paper tube forming device; and a cooling material is sprayed. Through the skillful design of thedouble-layer formed paper lapping holes, the surfaces of the formed paper tubes are in smooth transition; meanwhile, the supporting property of double-layer formed paper is very good, so that the quality problem of the circumference and roundness of existing paper tubes can be effectively improved; and namely, the rebound resilience of the pressed formed paper tubes and the roundness of the formedpaper tubes are relatively good, so that the filter tip formed by compounding the paper tubes has relatively good supporting property and cooling effect; and by unique and novel structure design andprocessing technology and equipment, the quality problem of the circumference and roundness and the cooling rate can be effectively improved, continuous industrial production can be realized, and meanwhile, the production cost is reduced.

The invention discloses a composite filter plant for a fresh air fan. The composite filter plant for the fresh air fan comprises a primary filter screen, an efficient air filter screen, an electrostatic dust removal filter screen and a photocatalyst filter screen. The electrostatic dust removal filter screen and the photocatalyst filter screen are arranged between the primary filter screen and the efficient air filter screen, the photocatalyst filter screen is a thin film filter screen, nanometer titanium dioxide and tolyltriazole are mixed with each other to manufacture the thin film filter screen, and transition metal complexes are coated on the surfaces of the photocatalyst filter screen; the electrostatic dust removal filter screen is made of polypropylene treated by electrostatic electrets. The composite filter plant for the fresh air fan has the advantages that sterilization effects can be realized by the photocatalyst filter screen without perpendicular incidence of ultraviolet light, dust removal effects of electric fields can be realized by the electrostatic dust removal filter screen without being powered on, and accordingly energy consumption can be reduced; the composite filter plant can be washed, and the filter screens are convenient to clean.

The invention discloses a 3D honeycomb type paint mist filter bag and a preparation method thereof. The preparation method comprises the four steps of preparing pyrrole-based polystyrene, preparing pyrrole-based polystyrene cross-linked glass fibers, preparing a 3D honeycomb type filter material and preparing the paint mist filter bag. According to the invention, acrylamide, polyvinyl alcohol and the pyrrole-based polystyrene cross-linked glass fibers are compounded to obtain the 3D honeycomb type filter material, the filter material is endowed with good recovery capacity through the dynamic ionic cross-linking effect of hydroxyl and borate ions of polyvinyl alcohol, and the pyrrole-based polystyrene cross-linked glass fibers and the polyvinyl alcohol form a good 3D network structure. In addition, carboxymethyl starch and acrylamide form a layer of compact composite filter membrane on the surfaces of the glass fibers, and the 3D honeycomb type filter material can be effectively fixed on the surfaces of the glass fibers. Meanwhile, the compactness and the connection strength of the glass fibers are enhanced, and the network structure of the 3D honeycomb type filter material and abundant pore structures on the surfaces of the glass fibers are beneficial to adsorption of paint mist.