85results about How to "Meet filter requirements" patented technology

The invention aims at solving the problem of high cost of ethanol extraction of hemicellulose and provides a method for extracting the hemicellulose from plant fiber. The method is characterized by comprising the following steps of dissolving the plant fiber in an alkaline solution with the mass fraction of 5%-15%, then removing large particle impurities in the alkaline solution obtained by squeezing by adopting a conventional pre-filtration method, further enabling the alkaline solution to enter a ceramic membrane device through a pump to perform cross-flow filtration, adding an acid into an obtained concentrated solution for neutralization, collecting the precipitated hemicellulose, and drying to obtain the hemicellulose, wherein the alkaline solution after pre-filtration contains 50-100g / l of alkali and 40-60g / l of hemicellulose. The whole process basically adopts a pure physical method to extract the hemicellulose, the purity of the obtained hemicellulose is high, and the operation cost is low.

A four-model resonator-based compact dual-passband high-temperature superconductive filter is characterized by comprising an outer ring half wavelength hairclip resonator, an open circuit T type spiral branch, a first open circuit spiral branch, a second open circuit spiral branch, an input end and an output end; the open circuit T type spiral branch is arranged in the outer ring half wavelength hairclip resonator symmetrical about the open circuit T type spiral branch; the first and second open circuit spiral branches are arranged in the outer ring half wavelength hairclip resonator, and are symmetrical about the open circuit T type spiral branch; and the distance between the first open circuit spiral branch and the open circuit T type spiral branch is the same as that between the second open circuit spiral branch and the open circuit T type spiral branch; and the input end and the output end are in gap coupling with the outer ring half wavelength hairclip resonator. The four-model resonator-based compact dual-passband high-temperature superconductive filter can meet the communication system filtering demands on signals in non-adjacent wavebands, is small in size, simple and compact in structure, flexible in design and has an ultrahigh Q value.

The invention discloses a solar blind ultraviolet optical lens and system. The lens comprises a first positive lens, a reflector with a central through hole, a negative lens and a second positive lens which are arranged from an object side to an image side. An ultraviolet waveband transmission film is coated on one surface, which is back to the reflector, of the first positive lens. One surface, which faces the reflector, of the first positive lens comprises a first emergent surface, a first reflecting surface and a second emergent surface which are arranged from the top to the bottom. The ultraviolet waveband transmission film is coated on the two surfaces of the negative lens. The ultraviolet waveband transmission film is coated on one surface, which faces the negative lens, of the second positive lens, wherein the ultraviolet waveband transmission film is a film system with high transmittance for 240nm-280nm and high blocking for 280nm-600nm. The system comprises the lens, an interference type ultraviolet optical filter and an image surface. The filtering function of the solar blind ultraviolet optical system is realized by performing film coating on different lenses of the optical lens with combined use of the interference type ultraviolet optical filter.

The invention discloses a nested composite filter core. The nested composite filter core comprises a first-stage filter core and a second-stage filter core which are mutually and coaxially nested and have hollow cylinder shapes, wherein the first-stage filter core passes through and is arranged in the bore of the second-stage filter core, the first-stage and second-stage filter cores have a same height, and the external diameter of the first-stage filter core matches with the internal diameter of the second-stage filter core; and both ends of the first-stage and second-stage filter cores are respectively provided with a cover seal, and the cover seals of the first-stage and second-stage filter cores are tightly combined together through gaskets to form the composite filter core. Two different filter materials can be simultaneously provided when the composite filter core is used, so the two filter materials with different functions are combined together to realize a case that filter requirements of the two filter materials can be satisfied through only using a filter; and the two stage filter cores can be individually replaced, so the whole replacement of the filter cores is avoided, thereby the service life of the whole composite filter core is prolonged, and the use cost is reduced.

The invention discloses a manual pressurization type fast water purifier. The water purifier comprises a water storage barrel, and a filtration barrel is in threaded connection with the top of the water storage barrel; a second activated carbon filtration layer, a reverse osmosis (RO) filtration layer, a first activated carbon filtration layer and a PP cotton filtration layer are arranged in the filtration barrel from outside to inside; a pressure cylinder is fixedly connected to the inner bottom of the filtration barrel, and a plurality of one-way water outlets are uniformly formed in the bottom of the side wall of the pressure cylinder; an upper cover is in threaded connection with the top of the filtration barrel; a guide sleeve is fixedly arranged in the center of the top of the uppercover, a lifting rod is slidingly connected to the guide sleeve, a press plate is fixedly connected to the top of the lifting rod, and a reset spring is arranged between the press plate and the uppercover; the bottom end of the lifting rod is located in the pressure cylinder and fixedly connected with a pressure plate. According to the water purifier, pressure is provided downwards through the press plate, water can flow downwards rapidly, and the filtration speed is increased; meanwhile, by providing pressure, water can be conveniently filtered by the RO filtration layer, and the water purification effect is effectively improved.

The invention discloses a vertical cross-flow filtration integration device based on a hollow fiber membrane. The vertical cross-flow filtration integration device includes a pressure vessel, and is characterized in that a feed solution inlet is formed in one end of the pressure vessel, a concentrated solution outlet is formed in the other end of the pressure vessel, the pressure vessel is internally provided with at least one filter element integration assembly, the flow direction of feed liquid in the pressure vessel vertically bypasses the filter membrane surfaces of the filter element integration assemblies, the filter element integration assemblies are internally provided with filtered solution collection chambers, a filtered solution collecting pipeline is arranged on the lower partof a bottom plate of the pressure vessel, each filtered solution collection chamber communicates with the filtered solution collection pipeline, a filtered solution outlet is formed in one end of thefiltered solution collection pipeline, and a waste liquid discharge outlet is formed in the position, at one end of the concentrate solution outlet, of the pressure vessel. The vertical cross-flow filtration integration device based on the hollow fiber membrane has the advantages that the problem of pollution of the hollow fiber membrane is effectively reduced, the filtration efficiency of a membrane assembly is maintained, the effective utilization rate of an internal assembly of the hollow fiber membrane can be significantly increased, and the reuse cycle of the membrane assembly is prolonged.

The invention discloses a universal rotation type filter utilizing a polyamide filter element. The universal rotation type filter comprises a shell and the filter element arranged in the shell. The filter element comprises an upper end cover, a lower end cover, filter paper and a polyamide melt-blown filter material. A thread connecting plate is arranged at an opening part of the shell. A plurality of oil inlet through holes are formed in the periphery of a thread connecting plate thread through hole. An oil product entering from a filter base oil inlet pipe enters the part between the shell and the filter element through the oil inlet through holes of the thread connecting plate. A plurality of symmetrically-distributed protruding teeth are arranged on the outer edge of the thread connecting plate. Grooves matched with the protruding teeth are formed in the opening part of the shell. The circumferential size of the protruding teeth is smaller than that of the grooves. A supporting structure is arranged at the bottom of the shell, and under the effect of the supporting structure, the thread connecting plate is pressed and attached to the part between the opening part of the shell and a filter element oil outlet. The universal rotation type filter solves the problem that a filter element in an existing filter shell cannot be replaced, has the beneficial effects of being high in dirt containing capability, high in filtering precision and the like, and is suitable for filtering of various oil products.

The invention relates to a fuel oil tank with an external circulation filtering device and a fuel oil engine. The fuel oil tank with the external circulation filtering device comprises an oil tank body and a filtering device arranged outside the oil tank body, the filtering device comprises a hydraulic pump, a filter, an oil extraction pipe and an oil return pipe, and the oil extraction pipe and the oil return pipe are arranged on an oil tank shell; and fuel oil is sucked in from the oil tank body through the hydraulic pump and is filtered through the filter to be discharged to the oil tank body through the oil return pipe, and a filter element of the filter is a polyamide melt-blow filter element. When an oil product is polluted or every a certain time, the fuel oil in the oil tank body is circulated and filtered, so that pollutants, such as metallic oxide, separated-out colloid and asphaltene generated by long-time placement, in the oil product are eliminated; and meanwhile, when the oil tank is used for the engine, pollutant discharge of the engine can be reduced, fuel consumption is reduced, and faults of the engine are reduced. Meanwhile, when the engine does not work, the oil product is repeatedly purified, the quality of the oil product is guaranteed, the combustion efficiency of the engine is improved to the maximum degree, and pollutant discharge is reduced.

The invention provides a novel cylindrical external compression ultrafilter membrane assembly. The novel cylindrical external compression ultrafilter membrane assembly comprises an external coarse filtering unit, an upper end closure unit, a lower end closure unit, and an ultrafilter membrane cluster combination filtering unit and an aeration hole arranged in the external coarse filtering unit; two ends of the external coarse filtering unit are connected with the upper end closure unit and the lower end closure unit respectively; the upper end closure unit is provided with an upper water outlet tube, a gas discharging tube and an ultrasonic device interface, and the lower end closure unit is provided with a water outlet tube and a gas inlet tube; water outlets at two ends of the ultrafilter membrane cluster combination filtering unit are connected with the upper water outlet tube and the lower water outlet tube respectively; and gas holes are arranged at the bottom of the gas discharging tube of the upper end closure unit and the bottom of the gas inlet tube of the lower end closure unit respectively. The ultrafilter membrane assembly has the advantages of compact structure, small occupied area, use convenience, flexible operation, wide application range and good popularization application prospect.