1742results about How to "Improve filtration efficiency" patented technology

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.

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 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.

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 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.

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.

The invention discloses a preparation method of a composite ceramic filter core containing diatomite and charcoal. In the preparation method, raw materials with high melting points are not used, and a mode of first dispersion and then partial flocculation is used for preparing a slurry for slip casting to enable raw materials and pores in a green body to be highly and uniformly dispersed, thus the sintering temperature is not higher than 950 DEG C, and natural micropores in the diatomite can not collapse because of high-temperature sintering.

The invention discloses a preparation method of a layer-by-layer self-assembled hollow fiber forward osmosis membrane. The preparation method comprises the steps of: preparing hollow fiber forward osmosis base film, modifying hollow fiber ultrafiltration base film, repeating layer-by-layer assembly of polycation and polyanion layers, performing interface cross-linking polymerization for preparinga selective functional layer, conducting moisturizing, and carrying out treatment and storage so as to prepare the layer-by-layer self-assembled hollow fiber forward osmosis membrane. The surface of the hollow fiber self-support base film which is prepared by using a phase conversion method is activated firstly, layer-by-layer assembly of polycation and polyanion is repeated on the surface of thefilm so as to form an functional polarization layer for an electrolyte solution, and the polyamide selective layer is prepared through interfacial chemical cross-linking polymerization. The prepared hollow fiber forward osmosis membrane has a controllable thickness and an internal polarization layer with a high charge capacity, and the internal concentration polarization phenomenon can be alleviated effectively during the forward osmosis process; therefore, the hollow fiber forward osmosis membrane can simultaneously obtain high flux and low reverse salt flux, has high filtration separation efficiency, easy cleaning and a long service life, and can be widely applied to seawater desalination and concentration and desalination of brine.

The invention relates to a double-component melt-blown durable electret non-woven fabric and a manufacturing method thereof. The non-woven fabric consists of tourmaline modified polypropylene/polyethylene glycol adipate (tourmaline modified PP/PET) parallel double-component melt-blown nano microfiber; and the fiber has the following components in percentage by mass: 20 to 80 percent of tourmaline modified PP, and 80 to 20 percent of PET. The method for manufacturing the non-woven fabric adopts the components in percentage by mass and the process steps of: (1) performing drying pre-treatment on the PET first; (2) then preparing a double-component melt-blown non-woven fabric by tourmaline modified PP/PET melt-blown composite spinning technology; and (3) finally obtaining the double-component melt-blown durable electret non-woven fabric by performing high-voltage corona discharge electret treatment on the non-woven fabric. The non-woven fabric can be used for durable high-efficiency filtration materials, and can also be applied to thermal insulation materials, antibacterial medical materials, oil absorption materials and the like.

The invention discloses electret master batch for melt-blown non-woven fabric for a low-resistance mask and a preparation method of the electret master batch. The electret master batch for the melt-blown non-woven fabric for the low-resistance mask is prepared from the following components in percentage by weight: 65-85% of polypropylene resin; 1-3% of electret powder; 5-15% of a dispersant; 3-10%of a nucleating agent; 3-10% of a softening agent; 0.05%-0.5% of a processing aid; wherein the softening agent is erucyl amide; the polypropylene resin is homo-polypropylene and/or co-polypropylene,and the melt index MFI of the polypropylene resin is 230 DEG C/2.16 kg and is not lower than 1000 g/10 min. According to the electret master batch, the softening agent, the nucleating agent and othercomponents are added, so that when the electret master batch and the ultra-high melt index polypropylene are mixed to be used for producing the melt-blown non-woven fabric for the mask, the obtained melt-blown non-woven fabric for the mask can have low respiratory resistance while having high filtering efficiency, and therefore the electret master batch is particularly suitable for being used as amask material. The formula does not greatly adjust the formula of the existing electret master batch, and is easy to implement.

The invention discloses an aerobic fermentation reaction system and method. The high-efficiency intelligent aerobic fermentation reaction system comprises an aerobic fermentation reactor, a circular water system, a gas intake and exhaust system, a detection system and a control system, wherein a water jacket is arranged outside a horizontal roller of the aerobic fermentation reactor; a material feeding and discharging hole and a gas intake and exhaust hole are respectively formed in sealing covers at two sides of the horizontal roller; the circular water system is connected and communicated with the water jacket on the horizontal roller; the gas intake and exhaust system is connected and communicated with the gas intake and exhaust hole in the sealing cover of the horizontal roller; a sensor of the detection system is arranged in the aerobic fermentation reactor and on a water passing pipe of the aerobic fermentation reactor; a signal output by the sensor is respectively connected with the control system; and the control system is used for controlling the circular water system, the gas intake and exhaust system, the aerobic fermentation reactor and external feeding and discharging conveying equipment. According to the high-efficiency intelligent aerobic fermentation reaction system and method disclosed by the invention, the occupied area is smaller and the fermentation efficiency is higher; no secondary pollution occurs; and the reduction, harmlessness and resourceful treatment of organic wastes can be quickly realized.

The invention belongs to the technical field of high-polymer materials, and particularly relates to a polypropylene (PP) electret master batch material, a method for preparing the same and applicationof the polypropylene electret master batch material. The PP electret master batch material is mainly prepared from components including, by weight, 50-100 parts of polypropylene, 8-50 parts of electret agents, 0-3 parts of compatibilizers, 0.05-0.35 part of antioxidants and 0-3 parts of anti-aging agents. The components are molten and granulated to obtain the polypropylene electret master batch material. The polypropylene electret master batch material, the method and the application have the advantages that resin and auxiliaries are uniformly mixed with one another in melt blending modes, accordingly, obvious electret effects can be realized by melt-blow non-woven materials produced from the polypropylene electret master batch material prepared by the aid of the method, the melt-blow non-woven materials are high in filter efficiency and low in filter resistance, and the like.

The invention discloses a handheld dust collector, which is characterized in that a body of the dust collector is internally provided with the spiral two-level tornado dust-air separation structure and a one-level dust cylinder, wherein the spiral two-level tornado dust-air separation structure comprises a first-level cyclone cylinder, a second-level cyclone cylinder, a spiral gas-air separation device arranged at the upper end of the second-level cyclone cylinder and a cyclone cover. The first-level cyclone cylinder and the cyclone cover carry out first-level gas-air separation on primary dust-air getting into the spiral two-level tornado dust-air separation structure, and separated two-level dust-air gets into the second-level cyclone cylinder to receive second-level dust-air separation. The dust collector disclosed by the invention is small in number of components, simple in assembling procedure and high in comprehensive performance of the complete machine. Meanwhile, the spiral two-level tornado dust-air separation structure is small in size, can effectively reduce the space of the machine body, and realizes the maximum dust storage volume.

The invention discloses a method for preparing a fibroin nanofiber and metal organic framework composite film. The method includes: vertically immersing a fibroin nanofiber film into first ligand solution which contains metal ions; then adding second ligand solution, and enabling the fibroin nanofiber film and the two ligand solutions to react for specific time at a specific temperature so as to enable a metal organic framework substance to grow on the surface of the fibroin nanofiber film, so that the composite film is formed; taking out the composite film, washing with deionized water, and drying to obtain the film. By adoption of the method, problems of nonuniformity in nucleating and poor processability in a metal organic frame film preparation process are solved, the film has advantages of simplicity in preparation, high filter efficiency, high capacity, particle uniformity, high stability, high film continuity and the like, the adsorption performance is improved, and adsorption of various organic and inorganic substances and wide application are realized.

A method for a vehicle comprises responsive to installation of a new exhaust particulate filter, doping fuel with an ash-producing additive, and combusting the doped fuel to produce ash, wherein the ash deposits as an ash coating on the new exhaust particulate filter. In this way, a filtration efficiency of an exhaust particulate filter can be increased quickly as compared to a filter with no deposited ash coating, inexpensively as compared to conventional methods using membranes, and with a lower back pressure drop as compared to conventional methods.

The invention relates to a compound air filter material and a method for preparing the same. The composite air filter material used for filter bags comprises a protective layer, a deodorizing layer and a filter layer, wherein the protective layer and the filter layer are compounded on two side faces of the deodorizing layer respectively; the protective layer is made of wood pulp fiber filter paper, spun-bond non-woven fabric or spun-lace non-woven fabric, and the gram weight of the material of the protective layer is 10 to 200g/m; the deodorizing layer is made of one of active carbon, zeolite , sodium bicarbonate, magnesium aluminum silicates and silica gel or a mixture of any two of the wood pulp fiber filter paper, the spun-bond non-woven fabric and the spun-lace non-woven fabric, and the gram weight of the material of the deodorizing layer is 10 to 300g/m; and the filter layer is made of melt-blown non-woven fabric, wood pulp fiber filter paper or SMS non-woven fabric, and the gram weight of the material of the filter layer is 10 to 100g/m. The compound air filter material has high filtration efficiency and deodorization efficiency, low filtration resistance and high dust capacity.

The invention discloses a multifunctional high efficient organic material decomposition agent and a preparation method thereof. The decomposition agent of the invention comprises composite original strains consisting of bacillus amyloliquefaciens, Aspergillus oryzae, Trichoderma viride, and Saccharomyces cerevisiae and an organic material carrier, and an inorganic carrier. Strains of the decomposition agent can be mutualistic, and have complementary advantages. The adaptation is wide, and a plurality of organic matter clastic enzymes can be produced by metabolism. The decomposition agent has high activity and can be used for fermentation and conversion of a plurality of organic materials such as livestock and poultry excrements, crop straws, city sludge, food waste, food processing and pharmaceutical waste residues, and has fast fermentation start, fast deodorization, low temperature resistance, and low moisture resistance. The fermentation period is shorter by 5-7 days than that in the same technology. Fermented and converted organic fertilizers have the obvious rhizosphere ecological regulation and control function, promote the root growth, and improve the root vitality. A plurality of soil borne diseases are prevented by improving the flora diversity, hyperparasitism and biological antagonism.

The invention relates to a multilayer electret nanofiber filtering material and a preparation method thereof. The invention adopted the technical scheme is as follows: through an electric-field stepped increasing/reducing technology, utilizing a combined needle head for electrostatic spinning to realize deposition of spinning polymer solution on a receiving substrate to obtain nanofiber, carrying out slight dissolving treatment on the surface of a nanofiber layer by a certain release rate by adopting a recovery solvent steam, wherein the nanofiber layer is uniformly filled with electret materials and the diameter of the nanofiber layer is distributed in a stepped-increasing or stepped-reducing manner along the direction vertical to the breadth. According to the multilayer electret nano-fiber filtering material, the electret charge stability is extremely high, the surface electrostatic potential is 250-7000V, simultaneously the filtering performance is excellent, the filtering efficiency for 0.03-10 microns particulates is more than 99.997%, the resistance pressure drop is less than or equal to 39Pa, the service life is long, and the development and application prospect in the aspect of filtering materials for air purifiers, window gauzes, masks and filtering papers and the like are wide.

The invention discloses a fermented organic fertilizer. The fermented organic fertilizer comprises the following components in parts by mass: 1000-1500 parts of stalk, 1000-1300 parts of chicken manure, 1000-1500 parts of cattle manure, 800-1200 parts of pig manure, 1200-1800 parts of soybean meal, 35-50 parts of a microbial agent, 10-20 parts of peat humic acid, 50-80 parts of corn meal, 60-90 parts of composite enzyme preparation and 30-60 parts of complex bacteria. The invention also discloses a fermentation method of the fermented organic fertilizer. As the method adopts the microbial bacteria and the composite enzyme preparation, the fermentation efficiency is improved, the fermentation time is effectively reduced, the consumption amount of water, electricity and steam is reduced, the production cost is lowered, and the method is suitable for industrial large-scale production; the fermented organic fertilizer disclosed by the invention has no malodor when used in fields, is cost-saving due to the reduction in the consumption, does not result in soil impoverishment, hardening and salinization, and meets the trend of energy-saving, environment-friendly and sustainable development.

A soil screening device with the soil crushing function comprises a bottom plate, a recycling device, a frame, support devices, a first motor device, a filtering device, a feeding device and a second motor device. The bottom plate is provided with wheels, first fixing blocks and second fixing blocks. The recycling device is provided with recycling tanks, segment rings, first fixing frames and baffle rings. The frame is provided with first through holes, filtering rings, first fixing rings, second through holes and positioning rings. The support devices are provided with second fixing frames, third fixing blocks, cushion rings and first supporting rings. The first motor device is provided with a first motor, a first rotating shaft, a rotary disc and second fixing rings. The filtering device is provided with a first filtering net, material collecting rings, first protruding blocks and a material collecting hopper. The feeding device is provided with a feeding pipe, a feeding hopper, a crushing wheel and crushing teeth. The second motor device is provided with a second motor, a connecting rope, a fixing frame, a crushing block, second protruding blocks and the like. By means of the soil screening device, the soil can be sufficiently screened and filtered, and the filtering and screening efficiency is improved.

The invention relates to a nanofiber filter material which comprises at least one porous nanofiber layer formed by continuous polymer fibers with a diameter less than 1000 nm. The nanofiber filter material is characterized in that the nanofibers are prepared by the solution jet spinning technology, the gram weight of each nano-layer is at least 1.5 g/m<2>; the nanofibers are in a three-dimensional curled state, the porosity of the fiber layer is more than 95%, and the proportion of the pores having an aperture of 1-10 micron in the fiber layer is more than 95%. When particles having a mean grain size of 0.3 micron are filtered at a surface speed of 5.33 cm/s, the filtration efficiency of the filter material nanofiber layer is at least 40%, the initial pressure drop is less than 8 mmH2O, and the filtration quality factor QF of the filter material is higher than 0.06 (1/mmH2O). The nanofiber filter material provided by the invention has a filtering property with high efficiency and low resistance.

The invention discloses a production method of a high-salt diluted and low-temperature fragrant soy sauce, which comprises the following steps of: (1) curing raw materials including wheat and defatted soybeans, and then uniformly mixing the wheat and the defatted soybeans; (2) inoculating aspergillus oryzae strains to the obtained raw material mixture so as to obtain a yeast; (3) cultivating the yeast for 44-48 hours at a temperature of 25-30 DEG C so as to obtain a mature yeast; (4) adding 2.0-2.5 weight times of saline water into the mature yeast so as to obtain a raw soy sauce mash; (5) moving the raw soy sauce mash to the inside of an airtight fermentation tank for fermenting: firstly fermenting for 23-27 days at a temperature of 13-17 DEG C, then continuing to ferment at a temperature of 28-32 DEG C, and on the 28-32nd days, adding mixed fermentation strains into the fermentation tank and continuing to ferment; in the process of fermentation, stirring by using a compressed air flow; and fermenting for more than six months so as to obtain a mature soy sauce mash; and (6) squeezing and filtering the mature soy sauce mash so as to obtain the low-temperature fragrant soy sauce. According to the invention, the conversion rate of proteins in raw materials is high, and the contents of ammonia nitrogen, total nitrogen, soybean peptides and soybean oligosaccharides in the prepared soy sauce are high.

A porous polymeric sheet is provided having an electrostatic charge and comprising a zero-three composite of a polymeric matrix and a ferroelectric material dispersed therein. The polymeric component comprises a non-polar thermoplastic polymer, such as a polyolefin, and a second thermoplastic polymer having polar functional units, such as a telomer. The composite material is formed into a porous sheet and is electrically or corona poled to create an electret material which is well suited four use in various filtration, air-masking and dust wipe applications.

An object of the present invention is to provide a method for manufacturing a hollow fiber module that makes it possible to decrease the spacing between a plurality of hollow fiber sheets and facilitate the formation of a potting portion with a two-layer structure. The method for manufacturing a hollow fiber module of a preferred embodiment includes: a first step of preparing a plurality of units in which a plurality of hollow fibers are fixed and provided side by side at the end portion side thereof on plate-shaped members; a second step of laminating the plurality of units so that portions of the plate-shaped members overlap via a first curable resin and filling a partial region on a side opposite the end portion side between the adjacent plate-shaped members with the first curable resin; and a third step of filling a region on the end portion side from the first curable resin between the adjacent plate-shaped members with a second curable resin having a hardness after curing that is higher than that of the first curable resin, and then curing the second curable resin.

The invention provides methods and systems for the production of at least one product from the microbial fermentation of a gaseous susbtrate, wherein the gaseous substrate is derived from a biomass liquefaction process. The invention provides a method for improving efficiency of the fermentation by passing biomass accumulated in the fermentation process to the biomass liquefaction process for conversion to a gaseous substrate. In a particular aspect of the invention, the biomass liquefaction process is selected from pyrolysis or torrefaction.

The invention provides a double-channel ceramic filtering membrane. A main body of the membrane is in a cylindrical shape, the center of a circle is provided with a drainage hole, the periphery of the drainage hole is radially provided with two layers of membrane holes, membranes are coated in the membrane holes, the drainage hole is externally connected with a water outlet pipe, the membrane holes are externally connected with a water inlet pipe, penetrating liquid after being filtered by an inner-layer membrane hole enters the drainage hole under the action of pressure of the water inlet pipe and is recovered by the water outlet pipe, penetrating liquid after being filtered by an outer-layer membrane hole is infiltrated under the action of pressure of the water inlet pipe by the outer wall of the main body of the double-channel ceramic filtering membrane and is also recovered so as to form double channels, and the water inlet pipe and the membrane holes are sealed; moreover, the compactness degree of the water inlet pipe is greater than the compactness degree of the membranes in the membrane holes, and a plurality of grooves are integrally arranged on the outer circumference of the main body of the membrane in an axial direction; and moreover, the width of the grooves is greater than the diameter of the membrane holes. According to the double-channel ceramic filtering membrane, the path of liquid reaching a penetrating side from a material inlet side in the main body of the membrane is shortened, one penetrating side is added for the inner-layer membrane hole which is adjacent to the drainage hole by the drainage hole, the filtration resistance is greatly lowered, and the filtration efficiency is enhanced.

This invention relates to a compressed gas cleaner utilizing a centrifugal impeller and spiral grooves by spinning a centrifugal impeller automatically with the dynamic power of compressed gas from a compressor, thus the separation of liquid, water, oil sludge and particular pollution dust can be completely cleaned with the spiral grooves instead of solid filters on the basis of specific difference, 1 to 1000, between gas and liquid. A compressed gas cleaner utilizing a centrifugal impeller and spiral grooves comprising: the spiral grooves for generating centrifugal gas stream without loss of pressure and the path of a liquid flow without sludge plugging on the basis of the labyrinth principle. Thus it is upgraded for a higher gas cleaning efficiency, 99.9% without any kind of solid filtering elements, drying chemicals and dehumidifying refrigerators on the basis of simple parts and structure for horizontal piping, low manufacturing fee, easy assembly and free maintenance for many years.

The invention discloses a method for producing marsh gas by utilizing corn cob fungi slag as a raw material through anaerobic fermentation. The method comprises the following steps: mixing the fungi slag wasted after corn cob is used as a main raw material to cultivate edible fungus with pig manure or cow dung, adding a methane reagent, and carrying out pile fermentation; and putting fermentationraw materials in a household methane-generating pit or an anaerobic reactor, wherein the addition amount of the raw materials is 80-130 kg per cubic meter of pit volume. In the invention, generation of methane via anerobic fermentation is achieved by carrying out reasonable proportioning, pretreatment, pile outside the pit, fermentation starting and the like on the fermentation raw materials, thereby effectively solving the problem that the pollution is caused by discarding the fungi slag at random and simultaneously turning waste into wealth. After the method is utilized, the gas can be normally generated by the fungi slag in the household, and the method is simple with no need of special equipment and can be applied and disseminated in edible fungus cultivating households.

The invention belongs to the technical field of textile, and particularly relates to a fabrication method of a needling/spunlace and electrostatic spinning compound filtering material. The method comprises the steps of fabricating a high-performance filtering material substrate by a needling method or a spunlace method, fabricating a high-performance filtering material surface layer by electrostatic spinning, placing the fabricated filtering material surface layer on the filtering material substrate, compounding by hot rolling at a temperature that is equal to or higher than a melting point of a low melting point fiber within 20 DEG C, and fabricating the high performance filtering material. The warpwise breaking strength of the fabricated high-performance filtering material is greater than or equal to 900N/5cm, and the weftwise breaking strength of the high-performance filtering material is greater than or equal to 1200N/5cm. According to the method, the novel high-performance filtering material is fabricated by a high-strength needling/spunlace filtering material and a high-filtration-performance electrostatic spinning fiber layer; the novel high-performance filtering material is high in filter efficiency, low in resistance, and high in breaking strength; the low-melting point fiber is mixed on the upper surface layer of the needling/spunlace filtering material to fabricate a needling/spunlace felt substrate; the felt substrate is compounded with the electrostatic spinning surface layer by the hot rolling; and a stable structure of the filtering material is formed by heat setting.

The invention relates to a method for producing organic fertilizer by using pig manures. After pig manures are subjected to dry-wet separation, the pig manures are subjected to dynamic-continuous high-temperature fermentation by using microorganisms, and in the process of fermentation, substances which are easily decomposed and easily produce odor in raw materials are decomposed and transformed by using the microorganisms, and the purposes of killing pathogens, eliminating odor, reducing the water content, lowering the volume and weight, and enhancing the available nutrient content are achieved by using the high temperature produced in the process of decomposition.