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1275results about How to "High filtration precision" patented technology

Zero-emission integrated process for treatment and reuse of high-salinity wastewater

The invention discloses a zero-emission integrated process for treatment and reuse of high-salinity wastewater. The invention relates to a softening desalination treatment technology of water and particularly relates to a reuse treatment system for reverse osmosis concentrated water containing low-concentration organic matters which can achieve the requirement of 'zero emission'. The integrated process comprises the following steps: (1) firstly softening and pre-treating the high-salinity wastewater; (2) acquiring pre-treated water by virtue of activated carbon adsorption and an ultrafiltration device; (3) acquiring nanofiltration softened water and nanofiltration concentrated water by virtue of a nanofiltration device; (4) acquiring reverse osmosis softened water and reverse osmosis concentrated water by virtue of a reverse osmosis device; (5) acquiring electrodialysis softened water and electrodialysis concentrated water by virtue of an electrodialysis device; and (6) carrying out evaporation crystallization treatment on the electrodialysis concentrated water by virtue of an evaporation-crystallization device, regularly outwards transporting salts generated by the evaporation crystallization, feeding generated salt into a water-producing tank to enter a reuse system and finally completing the treatment and reuse of high-salinity wastewater. The integrated process is mainly used for the integrated treatment of the high-salinity wastewater.
Owner:XINJIANG DELAND

Filter paper for cooling system in wire electrical discharge machining (WEDM) and production method of filter paper

InactiveCN102444054AReduce the maximum apertureReduce the average pore sizeNon-fibrous pulp additionPaper/cardboardPolyesterGlass fiber
The invention relates to filter paper for a cooling system in wire electrical discharge machining (WEDM), which comprises the following components in percent by weight: 18-25 percent of phenolic resin, 0.5-5 percent of glass fiber, 0.5-5 percent of polyester fiber and 65-82 percent of wood pulp fiber. A production method of the filter paper comprises the steps of pulping, pulp mixing, paper making, drying, glue setting and forming. The filter paper adopts the wood pulp fiber as the main material which is matched with a proportion of glass fiber and polyester fiber, so that the bore diameter of the filter paper can be reduced, and the filtering accuracy can be improved; and in addition, since the polyester is chemically-synthesized fiber and has high strength, the bursting strength of the filter paper is improved, and the service life of the filter paper is prolonged. In the production process of the filter paper, thermosetting phenolic resin is introduced by dipping setting glue, and the size stability, the high temperature resistance and the water resistance of the filter paper are further improved. When being applied to a cooling liquid circulating system in WEDM, the filter paper is not deformed or expanded and has good strength in water, and the phenomena of water jetting and black water generating due to bursting are avoided.
Owner:SUZHOU XINYE PAPER - MAKING

Industrial control network information security monitoring method based on funnel type white list

The invention relates to an industrial control network information security monitoring method based on a funnel type white list. The industrial control network information security monitoring method comprises the following steps that (1) industrial communication data are deeply parsed; (2) a credible framework is established for legal operation in an industrial control network; and (3) a white list funnel is established based on the credible framework. The beneficial effects of the industrial control network information security monitoring method are that reductive analysis is performed on multiple industrial communication protocols so that abnormal monitoring of the production control behavior can be realized; and the credible framework is established through combination of the industrial control network environment so that the white list funnel with the industrial characteristics is generated, filtering precision is high and the communication behavior in the industrial control network is monitored in real time, early warning time for perception of the unknown threat is enhanced, and thus the industrial control information system environment is stabilized as the core guiding thought and a monitoring system is constructed.
Owner:上海三零卫士信息安全有限公司

Waste salt resourceful treatment system and application

The invention relates to a waste salt resourceful treatment system which comprises a waste salt carbonization and pyrolysis system, a carbon-containing salt slag dissolving and filtering system and anevaporating and salt separating system in sequential connection, wherein the waste salt carbonization and pyrolysis system can carry out carbonization and pyrolysis treatment on waste salt I composedof sodium chloride, and sodium sulfate monomer salt or mixed waste salt and also can treat tail gas; the carbon-containing salt slag dissolving and filtering system can dissolve and filter the carbon-containing salt slag treated by the waste salt carbonization and pyrolysis system; and the evaporating and salt separating system can carry out evaporation and concentration, fractional crystallization and drying treatment on the strong brine treated by the carbon-containing salt slag dissolving and filtering system to obtain product salt. The waste salt resourceful treatment system takes industrial waste salt as the raw material, removes organic pollutant from waste salt and separates mixed inorganic salt to finally obtain an industrial second-grade salt product, so that recycling of waste salt is realized, and the flue gas generated during the production process is discharged after reaching the standard.
Owner:北京航天环境工程有限公司

Preparation method of pinhole-free dedusting filter bag

The invention discloses a preparation method of a pinhole-free dedusting filter bag. A filter bag is adopted, wherein the filter bag is sewn by a punched felt or nonwoven cloth the dustward surface of which is compounded with a polytetrafluoroethylene micro-pore film; a bag body is sewn by three stitches, and the bag opening is sewn by four stitches. The preparation method of the pinhole-free dedusting filter bag is characterized in that the sewing needle and thread of the filter bag is compounded with a micro-pore band which is sintered and shaped in a single surface in a hot pressing mode, and the micro-pore band covers stitch clearances of the bag body and the bag opening, so that the filtering precision at the stitch clearances of the sewn filter bag is improved; the hot pressing temperature is 400-1000 DEG C, and the compounding pressure is 0.2-1MPa. Compared with the prior art, the pinhole-free dedusting filter bag is high in filtering precision, good in dedusting efficiency, and the technical scheme is especially suitable for filter bags used for filtering PM2.5 dust; the effective filtering rate of PM2.5 dust can reach 99.99%; the pinhole-free dedusting filter bag is convenient to manufacture, is low in production cost, has a good use effect, and the preparation method is a PM2.5 filter bag manufacturing method with good application prospect and practical value.
Owner:SHANGHAI JINYOU FLUORINE MATERIALS

Preparation method of wrapped polytetrafluoroethylene ultra-micro filter tube membrane

ActiveCN103007788AAvoid layeringUniform filtering effectSemi-permeable membranesPorosityOrganic solvent
The invention discloses a preparation method of a wrapped polytetrafluoroethylene ultra-micro filter tube membrane. A sintered or unsintered drown polytetrafluoroethylene membrane of which the aperture is 0.03-0.3micon and the thickness is 10-50micon is cut into polytetrafluoroethylene strip-shaped membranes which are 5-25mm in width; the membranes are wrapped on a porous support tube which resists a temperature of 300-500 DEG C and is corrosion resistant and organic solvent resistant; and the support tube wrapped with the prepared polytetrafluoroethylene membranes is sintered for 20-80s at the temperature of 300-400 DEG C so as to prepare the wrapped polytetrafluoroethylene ultra-micro filter tube membrane of which the aperture of a filtering layer is 0.01-0.05micon. The wrapped polytetrafluoroethylene ultra-micro filter tube membrane has the advantages of high porosity, small aperture, uniformity in filtering layer, blocking resistance, internal and external pressure resistance, capability of back washing and the like, and can be used in solid-liquid and gas-liquid separation with high viscosity, high solid content and high pollution in food concentration, waste penetration liquid treatment, oil-water separation, membrane biologic reactor and the like.
Owner:ZHEJIANG SCI-TECH UNIV

Polyvinylidene fluoride based micro-pore film and preparation method thereof

InactiveCN105879710ASolve the disadvantage of insufficient hydrophobicityHas super hydrophobic effectSemi-permeable membranesMembranesPolymer sciencePolyvinylidene difluoride
The invention discloses a polyvinylidene fluoride (PVDF) based micro-pore film and a preparation method thereof. The polyvinylidene fluoride based micro-pore film comprises a polyvinylidene fluoride micro-pore film provided with a supporting layer in the middle and a low-surface-energy substance coating on the surface of the polyvinylidene fluoride micro-pore film. The preparation method comprises the following steps: selecting two types of polymers, wherein one is polyvinylidene fluoride; dissolving the two polymers into a solvent system to prepare a polymer solution; adding a pore-forming agent into the polymer solution; after uniformly stirring, standing and de-foaming to obtain a film-forming solution; immersing the supporting layer into the film-forming solution to obtain a primary micro-pore film; dissolving and etching the other polymer from the primary micro-pore film to obtain a primary PVDF based micro-pore film; immersing the primary PVDF based micro-pore film into a finishing solution containing the low-surface-energy substance and drawing out from a roller to obtain the PVDF based micro-pore. The film-forming solution is prepared by selecting two types of the incompatible polymers and the surface of the porous film is coated with the low-surface-energy substance, so that a microcosmic rough structure is formed on the surface of the micro-pore film and the super-hydrophobic effect is achieved.
Owner:DONGHUA UNIV

High temperature resistant flame retardant filter paper used for diesel filter and preparation method thereof

ActiveCN102877368AHigh temperature resistant and flame retardantBursting strengthPaper/cardboardFiltration separationBursting strengthCellulose
The invention discloses a high temperature resistant flame retardant filter paper used for a diesel filter and a preparation method thereof. The high temperature resistant flame retardant filter paper comprises the following raw materials in parts by weight: 60-70 parts of wood pulp celluloses, 30-40 parts of vinylon fibers, 10-15 parts of glass fibers, 2-5 parts of dolomite dust, 1-3 parts of nanometer titanium dioxide, 2-4 parts of light calcium carbonate, 1-2 parts of modified nano-carbon, 1-2 parts of nanometer titanium oxide, 0.5-0.8 part of ammonium dihydrogen phosphate, 3-4 parts of modified water-soluble phenolic resin emulsion, 2-5 parts of styrene-acrylic emulsion, 0.5-1 part of diethanolamide, 0.5-1 part of silane coupling agent KH550, 0.4-0.8 part of sodium laurylsulfate and 4-6 parts of a wet strength agent. The filter paper, prepared by the invention, has the advantages of good water permeability, large filtering area, small maximum aperture, high filtering precision, strong bursting strength, high temperature resistance and flame resistance, the filtering efficiency is 99.999%, the filter paper has stable performance index at normal temperature and high temperature, and better temperature resistance and filtering effect.
Owner:ANHUI PHOENIX INT CO LTD

High-intensity low-stretchability polysulfonamide high-temperature-resisting membrane filter material and preparation method thereof

The invention provides a high-intensity low-stretchability polysulfonamide high-temperature-resisting membrane filter material and a preparation method thereof. The filter material disclosed by the invention is formed by compounding a PTFE (Polytetrafluoroethylene) high-compactness microporous membrane layer and a punched felt in sequence from top to bottom. The punched felt is formed by compounding a first polysulfonamide fiber surface layer, a high-intensity low-stretchability base cloth layer and a second polysulfonamide fiber surface layer in sequence from top to bottom. The preparation method comprises steps of: preparation of the punched felt, high-temperature thermoforming, singeing and pressing treatment, full-saturation immersion treatment, predrying, baking curing, and high-temperature high-pressure coating with the PTFE high-compactness microporous membrane. The high-intensity low-stretchability polysulfonamide high-temperature-resisting membrane filter material has high intensity and low stretchability, longitude and latitude strengths are both larger than 3000N / 50mm; the longitude and latitude elongations at break are both smaller than 10%; and the filter material can resist a high temperature grade of 250 DEG C and has high corrosion resistance, good oxidization resistance, smooth surface, high deashing efficiency and wide application range.
Owner:NANJING FIBERGLASS RES & DESIGN INST CO LTD

Composite acupuncture filter bag used for smoke treatment of ceramic kiln

The invention discloses a composite acupuncture filter bag used for smoke treatment of a ceramic kiln. Short fibers and base fabrics are acupunctured by adopting non-woven acupuncture technology to form a composite acupuncture plain felt, the plain felt is soaked and coated by adopting a surface chemical treatment agent, and then the plain felt is dried and cured at a high temperature and is tailored and sewn to form the filter bag, wherein the base fabrics adopt 30-count alkali-free glass fiber woven fabrics; the short fibers for acupuncture comprise polypropylene fibers, polyphenylene sulfide fibers and 80-count short glass fiber yarns; and the surface chemical treatment agent comprises polytetrafluoroethylene emulsion, polyacrylic ester emulsion, coupling agent, antistatic agent and water. The invention provides the composite acupuncture filter bag used for the smoke treatment of the ceramic kiln, which has the advantages of moisture resistance, good acid corrosion resistance, long service life, high strength of the base fabrics and lower production cost. The problems of poor moisture resistance, poor corrosion resistance, low strength, short service life and high production cost of the filter bag in the prior art are solved. The filter bag is suitable for dust removal and purification treatment for the smoke of the ceramic kiln.
Owner:山东兴国新力环保科技股份有限公司

Battery capacitor membrane filtration material prepared by using wet papermaking forming process, and preparation method thereof

The present invention discloses a battery capacitor membrane filtration material prepared by using a wet papermaking forming process, and a preparation method thereof. Raw materials for preparing the material comprise, fibers, inorganic powder, organic powder and a reinforced material, wherein the fibers comprise, by weight, 3-10% of plant fibers and 90-97% of synthetic fibers, the weight of the inorganic powder is 1-40% of the weight of the fibers, the weight of the organic powder is 0.1-20% of the weight of the fibers, and the weight of the reinforced material is 10-30% of the weight of the fibers. The preparation method is characterized by: respectively carrying out pulping on the plant fibers and the synthetic fibers, and respectively carrying out high pressure homogenization mixing on the inorganic powder and the organic powder. The preparation method of the present invention has the following advantages that: the process is simple, the hole size can be effectively controlled, and the hole uniformity can be improved, wherein the holes are the labyrinth type curved holes. The material of the present invention has the following advantages that: filtration accuracy and filtration efficiency are high, internal resistance of the membrane prepared by the material is lowered, the membrane prepared by the material has characteristics of high liquid retention rate, good high temperature resistance, small deformation size, avoidance of dendrite generation and long service life. The raw material and the preparation cost of the material of the present invention are the same as the raw material and the preparation cost of full chemical fiber filtration material, and the performance price ratio of the material of the present invention is more excellent than the performance price ratio of the traditional materials, such that good economic benefits and social benefits are provided.
Owner:吕凯

Yellow phosphorus preparation method and yellow phosphorus preparation equipment

The invention discloses a yellow phosphorus preparation method and yellow phosphorus preparation equipment, which produce no phosphorous slurry and reduce the dust content of tail gas. The yellow phosphorus preparation method comprises the technological processes of electric furnace smelting, furnace gas purifying and phosphorus collecting and refining. In the process of furnace gas purifying, the furnace gas discharged out from an electric furnace is guided into a furnace gas dust-collection system through a smoke discharge pipeline, the furnace gas dust-collection system at least comprises a filter for filtering the furnace gas, the filter is provided with a sintering inorganic porous material filter element meeting the following working conditions, and the operations executed on the filter comprise the operation executed during starting a machine, the operation executed during normal operation, the operation executed during back flowing and the operation executed during stopping the machine; in the operation executed during starting the machine, pre-heated inertia gas is injected into the filter so as to preheat the sintering inorganic porous material filter element in the filter to the temperature of more than 187.5 DEG C, and in the operation executed during the normal operation, the to-be-filtered furnace gas of which the temperature is kept at 420-590 DEG C is input into the filter and the dust content of the filtered clean furnace gas is lower than 10-20 mg/m<3>.
Owner:CHENGDU INTERMENT TECH

Ceramic membrane for treating dusty, poisonous and high-temperature gases and preparation method thereof

The invention belongs to the field of inorganic nonmetal materials and particularly relates to a ceramic membrane for treating dusty, poisonous and high-temperature gases and a preparation method thereof. 90-99% by mass of ceramic membrane supporting body and 1-10% by mass of catalyst are prepared into a complex, and then, a ceramic membrane coating is spray coated on the outer surface of the complex to prepare the ceramic membrane. The catalyst is an SCR (Silicon Controlled Rectifier) denitration catalyst, and the ceramic membrane supporting body is prepared from aggregate, a high temperature binder, a pore forming agent, a forming assistant and a release agent. The preparation method is as follows: firstly, preparing the ceramic membrane supporting body, and then, compounding the catalyst in the pore of the supporting body, spray coating a layer of ceramic membrane coating material on the outer surface of the supporting body, and carrying out heat treatment to prepare a ceramic membrane material. The prepared ceramic membrane material has the advantages of high filtering precision, high permeability and erosion resistance and has dust removal and catalysis functions, thereby integrating denitration with dust removal and changing the traditional mode of gradual operation of independent operation units.
Owner:SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS

Automatic temperature control heating device of diesel vehicle fuel system

The invention discloses an automatic temperature control heating device of a diesel vehicle fuel system, belongs to the technical field of accessories of a motor vehicle fuel system, and solves automatic temperature control heating for fuel. Electric heaters which can independently and automatically control the temperature respectively and have automatic safety protection function are assembled at the corresponding parts of a fuel system; the heating device comprises a fuel pipe inner heater, a filter and an oil tank inner heater, wherein the fuel pipe inner heater consists of an electric heating wire L, a thermal fuse RD1 and a bimetallic temperature controller ZK1 which are connected in series together and form a whole through injection molding and packaging; and the filter and the oil tank inner heater form a whole through a heat-sensitive resistance heating sheet and the bimetallic temperature controller which are connected in series together. The heating device has the advantages that the heating device not only can solve the problems that a diesel vehicle is difficult to start and easy to shut down during running, but also can keep the temperature of the diesel supplied to an engine by the fuel system between 7 and 24 DEG C all the time, realizes year-round use of No.0 diesel oil, has high fuel heating speed, high efficiency and reliable safety protection function, can improve filter precision and reduce oil consumption and discharge, is convenient for a user to assemble and use the heaters for the fuel system parts as required in a single mode, a combined mode or a full system mode according to different vehicles and different seasons, and simultaneously is quite convenient to use.
Owner:BEIJING GAOXIN GREAT FILTER CO LTD
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