39results about How to "Small filter resistance" patented technology

The invention relates to a double-effect carbon clamping cloth with a regeneration function for an air purifier and a preparation method of the double-effect carbon clamping cloth, and the preparation method comprises the following steps: S1, uniformly mixing TiO2, K2CO3 and La (NO3) 3, roasting, immersing into a metal acid solution for dipping, taking out, drying and activating to obtain a heat release material; s2, ball-milling the heat release material obtained in the step S1 until the heat release material is uniform, and then adding a dispersing agent to obtain heat release material spraying liquid; s3, spraying the heat release material spraying liquid obtained in the step S2 on one side of a polyester non-woven fabric for multiple times to obtain a heat release skeleton layer; s4, a first hot melt adhesive net film, a first activated carbon layer and a second hot melt adhesive net film are sequentially laid on the non-spraying face of the heat-releasing framework layer obtained in the S3, after hot-pressing fixing is conducted, a second activated carbon layer, a third hot melt adhesive net film and melt-blown cloth are sequentially laid, hot-pressing forming is conducted, and the double-effect carbon clamping cloth with the regeneration function for the air purifier is obtained. Compared with the prior art, the filter material with the regeneration function is provided, the service life of a filter is prolonged, and the user cost is reduced.

The invention discloses a high-efficiency low-resistance electrostatic spinning multi-layer filtering material for a mask filter element and a preparation method of the high-efficiency low-resistance electrostatic spinning multi-layer filtering material. The method comprises the following steps: firstly, dissolving ODA and PMDA raw materials in a solvent to prepare a first PAA solution; then, preparing the solution into a first bead-like PAA nanofiber membrane by utilizing an electrostatic spinning technology; the preparation method comprises the following steps: preparing a first PAA / ZIF-8 nanofiber layer, dissolving a ZIF-8 raw material in the first PAA / ZIF-8 nanofiber layer, mixing the ZIF-8 raw material with ODA and PMDA to form a second PAA / ZIF-8 solution, superposing second PAA / ZIF-8 nanofiber layers on the first PAA / ZIF-8 nanofiber layer above and below the first PAA / ZIF-8 nanofiber layer through an electrostatic spinning technology, and carrying out thermal imidization treatment to successfully prepare the multi-layer filter material with a ZIF-8 modified PI / bead-like PI / ZIF-8 modified PI structure. The preparation process provided by the invention is simplified and efficient, and the prepared bead-like multilayer filtering material not only has the characteristics of excellent filtering efficiency and low resistance, but also shows huge application potential in the field of air purification.

The utility model discloses a piston type compressor gas filtering device which comprises a compressor body and a shell connected with a gas inlet pipe of the compressor body, a top cover is detachably installed on the top of the shell through a fixing assembly, a gas inlet is formed in the top cover, a filter cylinder is arranged in the shell, the bottom of the filter cylinder is of an open structure, and the bottom of the filter cylinder is provided with a gas outlet. The utility model relates to the technical field of compressor gas filtration, in the device, the open bottom design of the filter cartridge is combined with the ingenious matching of the guide blocks and the guide grooves, the filter cartridge is arranged in the shell, the filter cartridge is arranged in the shell, the filter cartridge is arranged in the shell, and the filter cartridge is arranged in the shell in a matched mode. A pair of guide blocks is fixedly arranged on two sides of the lower portion of the filter cartridge, and a pair of guide grooves matched with the guide blocks are formed in the inner walls of two sides. Smooth air circulation and filtering efficiency are guaranteed, the cleaning assembly is arranged, a brush on a cleaning ring is driven by a sliding rod, dust and impurities accumulated on the outer wall of the filter cylinder can be effectively removed, filtering resistance is reduced, efficient operation of the compressor is maintained, and performance reduction caused by filter blockage is avoided.

The invention discloses a polylactic acid-based nanofiber membrane as well as a preparation method and application thereof, and belongs to the technical field of air filtering membrane materials, fibers of the polylactic acid-based nanofiber membrane provided by the invention are formed by compounding an electroactive heterostructure layer and a dextrorotation polylactic acid layer, and the electroactive heterostructure layer is formed by a levorotation polylactic acid layer, an electret and a nucleating agent. According to the polylactic acid-based nanofiber membrane prepared by the preparation method disclosed by the invention, the PMs filtering efficiency reaches 99.0%-99.99%, the surface potential is maintained at 12 kV to 18 kV, the breathing resistance is 90 Pa to 180 Pa, the antiviral efficiency is 99.0%-99.98%, and the bacteria filtering efficiency is 99.2%-99.98%. According to the invention, the electroactivity and hydrophobicity of the nanofiber membrane are enhanced by combining a polylactic acid interface stereochemical compound with an electroactive heterostructure, so that the nanofiber membrane has the characteristics of fouling resistance (microorganisms, blood, dyes and the like) and high air filtration performance.

The utility model discloses a two-stage electric cleaning irrigation water source filter which comprises a controller, a first-stage filter cartridge and a second-stage filter cartridge, a first-stage cylindrical filter screen is arranged in the first-stage filter cartridge, and a first-stage filter screen brush driven by a first-stage brush screen motor to rotate is arranged in the first-stage cylindrical filter screen; a second-stage cylindrical filter screen is arranged in the second-stage filter cartridge, and a second-stage filter screen brush driven by a second-stage brush screen motor to rotate is arranged in the second-stage cylindrical filter screen; a water source inlet pipe is arranged at the water inlet end of the first-stage filter cartridge; a filter communicating pipe is communicated between the water inlet end of the second-stage filter cartridge and the peripheral wall of the first-stage filter cartridge; a water source water outlet pipe is arranged on the peripheral wall of the second-stage filter cartridge, and the first-stage brush net motor and the second-stage brush net motor are controlled by the controller to perform cleaning work. Two-stage filtration is adopted, the cleaning frequency is low, and the filtration efficiency is high.

The invention relates to a method for synchronously preparing a special-shaped inorganic nanofiber membrane. The method comprises the following steps: firstly, dissolving a polymer spinning aid, an acid chloride precursor and a silicon oxide precursor in a volatile solvent, spinning the mixed solution into a membrane by adopting an electrostatic spinning technology, and carrying out high-temperature calcination on a hybrid nanofiber membrane containing the polymer spinning aid, the acid chloride precursor and the silicon oxide precursor, the special-shaped inorganic nanofiber membrane is obtained. Compared with a nanofiber membrane material prepared by an existing process technology, the special-shaped nanofiber membrane disclosed by the invention shows good gas purification performance, is high in particulate matter separation efficiency and low in filtering resistance, and provides a reference thought for related fields such as high-efficiency and low-energy-consumption air purification membrane materials and the like.

The utility model discloses high-efficiency fiber filtering equipment for rainwater purification, which relates to the field of filtering and comprises a perforated movable plate, a pre-filtering water pressing area is arranged above the perforated movable plate, and a pre-filtering water pressing area is arranged above the pre-filtering water pressing area. The utility model has the beneficial effects that a set of fiber density adjusting device and a fixed partition plate with a filter cap are designed and mounted, the fiber density adjusting device is a polyvinyl chloride (PVC) movable plate with holes, and one end of a fiber bundle of a fiber filter material layer is fixed on the adjusting device; a filter cap is mounted on the fixed partition plate, and the partition plate separates the filter area from the filtered water storage area, so that the backwash water distribution amount is ensured to be uniform and stable, pollutants such as turbidity, COD (Chemical Oxygen Demand), total nitrogen, total phosphorus, ammonia nitrogen and the like in runoff rainwater can be effectively removed, and the treated rainwater can meet the requirement of direct discharge or reuse; the device has the advantages of high filtering precision, small occupied area, small filtering resistance, low power consumption, simplicity in operation, low labor intensity and the like.

The application relates to the technical field of high-solid acrylic resin, in particular to a high-solid acrylic resin production impurity removal device, which comprises a fine filter tank and a filtering assembly arranged in the fine filter tank, the fine filter tank is provided with a fine filter feeding pipe, a fine filter discharging pipe and a blowdown pipe, the filtering assembly comprises a fixed column, a plurality of rotary fine filter cartridges and a plurality of scraping plates, the plurality of rotary fine filter cartridges are distributed in a circumferential array around the axis of the fixed column and are driven to rotate around the axes thereof, the scraping plates are fixed on the fixed column, the plate surfaces of the scraping plates are in close contact with the outer walls of the rotary fine filter cartridges, the fine filter feeding pipe is used for guiding the resin to be filtered into the fine filter tank, the fine filter discharging pipe is in communication with the inner cavities of all the rotary fine filter cartridges and is used for guiding the filtrate to be discharged, and the device further comprises a preheating coarse filter tank and a conveying pipe. The application aims at solving the problem that the filter screen is prone to blockage in the prior art.

The invention belongs to the field of separation and filtration, and particularly relates to a filtering membrane with aperture sizes in gradient arrangement and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a membrane casting solution: mixing and dissolving dimethylacetamide, polyether sulfone, polyethylene glycol and an auxiliary agent, and defoaming to obtain the membrane casting solution; (2) preparing core liquid: mixing dimethylacetamide with water to obtain the core liquid; (3) preparing a gel bath: mixing dimethylacetamide with water to obtain the gel bath; the concentration of the gel bath is smaller than that of the core liquid; and (4) preparing the filter membrane: enabling the membrane casting solution to be in contact with the core solution and the gel bath through a spinneret plate, and enabling membrane filaments to pass through the gel bath to a filament collecting tank, so as to obtain the filter membrane of which the pore sizes are arranged in a gradient manner. The pore diameter of the filtering membrane is changed from a large pore diameter on one side to a small pore diameter on the other side in a gradient manner, and the filtering membrane has high retention rate and high flux, high mechanical strength, easy cleaning and low energy consumption.

This utility model provides a tap water floc separator, relating to the field of tap water treatment technology. The device includes a base, a mixing tank, a filter tank, and a chemical storage tank. The top plate of the mixing tank is provided with a first water inlet and a chemical inlet. The first water inlet is used to connect to the tap water pipe, and the chemical inlet is used to connect to the chemical storage tank. The bottom plate of the mixing tank is provided with a first water outlet, and a water pump is installed on the first water outlet. The top plate of the filter tank is provided with a second water inlet, and the output end of the water pump is connected to the second water inlet through a connecting pipe. The bottom plate of the filter tank is provided with a second water outlet and a third water outlet. An annular filter screen is provided inside the filter tank. The second water inlet and the third water outlet are located inside the filter screen, and the second water outlet is located between the filter screen and the filter tank body. A cleaning component is provided inside the filter tank to remove flocs on the water-facing side of the filter screen, preventing accumulation and ensuring that the filter screen can maintain good filtration performance, thereby improving filtration efficiency and quality.

The utility model discloses a tensioning room conveying line dust removal recycling device which comprises a belt conveying line and is characterized in that a conveying line cover plate is arranged at the top end of the belt conveying line in a covering mode, the conveying line cover plate is parallel to the belt conveying line, a dust remover is arranged at the top end of the outer portion of the conveying line cover plate, and the dust remover is connected with the belt conveying line. A dust remover is arranged on one side of the outer portion of the conveying line cover plate and connected with the conveying line cover plate through a pipeline, a dust hopper is arranged between the dust remover and the conveying line cover plate, a dust removal fan is arranged on one side of the outer portion of the dust remover and connected with the dust remover through a pipeline, and then dust-containing gas is sucked into an inner cavity filtering chamber of the dust remover through the dust removal fan in a negative pressure mode. Firstly, large-particle flying dust enters the dust hopper and then falls into the belt conveying line, fine particles are adsorbed to the outer surface of a cloth bag in the dust remover, and clean air penetrating through the cloth bag is exhausted through an exhaust chamber in the dust remover.

The utility model discloses a multifunctional water and fertilizer integrated irrigation machine which comprises a controller, a water source conveying and filtering device, a solid fertilizer filling device and a liquid fertilizer pesticide filling device, the controller is electrically connected with various sensors, the electric mechanism and the electric valve, so that automatic control can be realized; the water source conveying and filtering device comprises a water pump and a self-cleaning filter and can be used for conveying a water source and carrying out secondary water source filtration; the solid fertilizer filling device comprises a fertilizer dissolving water tank, a fertilizer solution filter, a shearing pump and a fertilizer solution filling pump; according to the device, the fertilizer can be injected into the fertilizer dissolving water tank in proportion, the shearing pump can circularly stir, shear, crush and dissolve the granular fertilizer, and the granular fertilizer solution is quantitatively applied into a farmland at a constant speed through an irrigation pipeline; the liquid fertilizer and pesticide filling device and the liquid fertilizer and pesticide diaphragm pump can be used for quantitatively filling liquid fertilizer and / or pesticide into the fertilizer dissolving water tank at a constant speed. The fertilizer dissolving device is complete in function, high in adaptability, good in filtering effect and high in fertilizer dissolving efficiency.

The invention relates to the technical field of aluminum alloy semi-solid processing, and provides a semi-solid slurry flow guide device for aluminum alloy, which comprises a shell, the bottom of the shell is fixedly connected with a rack, one end of the shell is fixedly connected with a feeding pipe, the other end of the shell is fixedly connected with a discharging pipe, and a material shifting mechanism is arranged at one end, close to the feeding pipe, of the inner side of the shell. The material stirring mechanism comprises two rotating plates which are arranged in parallel, a plurality of material stirring plates are fixedly connected between the two rotating plates, a plurality of electric heating pipes are arranged between every two adjacent material stirring plates, a first support is fixedly connected to the outer side of the rack, and a first motor is fixedly installed at the top of the first support; a flow guide mechanism is rotationally connected to the middle of the inner side of the shell, a filter screen is fixedly connected to the end, close to the discharging pipe, of the inner side of the shell, a stirring mechanism is arranged on one side of the filter screen, and a cleaning mechanism is arranged on the other side of the filter screen. Through the innovative mechanism design, the key problem in the aluminum alloy semi-solid slurry diversion process is solved.

The utility model discloses a flue gas purification dust remover for preparing metal silicon. The flue gas purification dust remover comprises a smelting furnace, a flue gas inlet, a raw material preheating pool, a cooling device and a dust removal filter, the dust removal filter is arranged on the right side of the cooling device, the first three-way valve, the second three-way valve and the filters are matched, the two filters are in threaded connection with the first three-way valve and the second three-way valve through the detachable pipe joints, and the dust removal effect is achieved through adjustment of the first three-way valve and the second three-way valve. When a large amount of dust is accumulated in one set of filters, the flow direction of the smoke can be changed by adjusting the first three-way valve and the second three-way valve, the smoke flows into the other set of filters, and at the moment, a user can replace the filter with the large amount of dust accumulated. Therefore, the filtering resistance is reduced, and the filtering efficiency of the filter is improved.

A method for dynamically capturing PM2.5 and bacteria by using magnetically controlled magnetic sterilization porous medium, a sandwich structure medium with magnetic, porous and sterilization functions is prepared by using a magnetically controlled pulse electrodeposition method. The magnetic sterilization porous particles are used as filter materials in a dynamic capture device, the filter materials are controlled by the magnetization force generated by the electromagnet and the centrifugal force generated by the channel rotation, the magnetic field strength and the rotation speed are changed, the magnetic sterilization porous particles achieve dynamic balance and oscillate along the force direction; in the inlet direction, the filter materials are controlled by the drag force of the airflow and the gravity, and are suspended in the channel; the suspended and oscillated magnetic sterilization porous particle filter materials dynamically capture PM2.5 and sterilize the bacteria attached to PM2.5. The centrifugal force and the magnetization force cooperatively control the suspended and oscillated filter materials to improve the meeting probability with the pollutants in the air, the filter materials have the characteristics of smaller filtration resistance, higher efficiency, sterilization function, low noise, large air processing amount per unit time and low energy consumption.

The invention discloses a top vertical air inlet electric bag composite dust collector, comprising an anode wire tensioning device (1), an anode tube (2), a cathode wire (3), a cathode hanging device (4), an air inlet pipe (5), a blowing device (6), an upper box (7), a flower plate (8), a filter bag (9), a bag cage (10), a middle box (11), an ash hopper (12), and an air outlet pipe (13). The middle box (11) is placed above the ash hopper (12). The blowing device (6), the upper box (7) and the flower plate (8) are arranged into four standard unit modules. The air inlet pipe (5) is vertically placed in the center of the four unit modules. The air inlet pipe (5) is provided with an anode tube (2) and a cathode wire (3). The four unit modules are placed above the middle box (11). The air outlet pipe (13) is installed on the side of the upper box (7). The invention combines the advantages of an electrostatic precipitator and a bag filter, has uniform airflow distribution, low operating resistance, extends the service life of the filter bag, reduces steel consumption compared to conventional bag filters, and has the characteristics of simplicity, practicality, high efficiency, etc.

The utility model discloses a wrinkled filter medium with M-shaped grooves, which comprises groove-shaped filter paper and plane filter paper adhered to the lower surface of the groove-shaped filter paper, the section of the groove-shaped filter paper is wave-shaped, and a plurality of air inlet channels are enclosed between the plane filter paper and the lower surface of the groove-shaped filter paper; when the corrugated filter medium forms the filter element in a winding or stacking mode, air outlet channels are defined between the upper surface of the groove-shaped filter paper and the plane filter paper above the groove-shaped filter paper, the air outlet channels and the air inlet channels are alternately arranged, the extending direction of the air outlet channels and the air inlet channels is the front-back direction, and the air outlet end is the front direction. The shapes and the sizes of the sections of the air outlet channel and the air inlet channel are kept unchanged in the front-back direction; the sectional area of the air inlet channel is larger than that of the air outlet channel. The air inlet channel is in an M shape or a double-M shape. The utility model further discloses a corresponding production line. Under the condition that the integral volume of the air inlet channel and the air outlet channel is not changed, the volume of the air inlet channel is increased, so that the dust holding capacity of the air inlet channel is improved, the filter resistance is increased less when the same amount of dust is held, and the service life of the filter element adopting the air inlet channel is prolonged.

This invention discloses a filtration method and system for solid-liquid two-phase flow. The method includes: S100, employing a filter frame with an opening at the top, the filter frame having a bottom filter section and a side filter section, the side filter section surrounding the bottom filter section; S200, a two-phase flow is introduced into the filter frame through the corresponding opening of a two-phase flow input device, and during the filtration process, a filter cake layer is formed in the filter cake accumulation area above the bottom filter section and within the side filter section, the introduced two-phase flow directly impacts the filter cake layer for filtration; and S300, when the thickness of the filter cake layer on the bottom filter section increases to the point where the filtration process cannot be completed smoothly, the two-phase flow continues to be filtered through the side filter section on the top side of the filter cake layer. The solid-liquid two-phase flow filtration method and system of this invention adopts the concept of filter layer disturbance filtration. By impacting the filter cake layer with the two-phase flow, the filter cake layer is continuously disturbed during the filtration process, resulting in a smaller filter cake layer density than that formed in a typical filtration process, thereby improving filtration efficiency and filtration quality.

The present invention relates to a novel and efficient process for refining or purifying a raw material.

The utility model provides a filter layer structure, a filter element and a kettle, the filter layer structure has a tiled state, and in the tiled state, the filter layer structure comprises a support layer, a filter element, a water inlet and a water outlet; the first hydrophilic protection layer is arranged above the supporting layer, and the first end of the first hydrophilic protection layer corresponds to the first end of the supporting layer; the filter medium layer is arranged above the supporting layer and located in the length direction of the first hydrophilic protection layer, the first end of the filter medium layer faces the second end of the first hydrophilic protection layer, and the second end of the filter medium layer corresponds to the second end of the supporting layer. According to the technical scheme, the problem that the flow velocity of filtered water is reduced due to the fact that the filtering medium layer is compacted in the related technology is effectively solved.

The invention relates to the technical field of filtering materials, and discloses a nanometer air filtering material which is composed of electrostatic spinning fibers loaded with calyx seu fructus physalis extract. The electrostatic spinning fiber loaded with the calyx seu fructus physalis extract comprises the following components in percentage by mass: 1-50% of the calyx seu fructus physalis extract and 50-99% of an electrostatic spinning material. According to the nanometer air filtering material, the calyx seu fructus physalis extract serves as an antibacterial component and is evenly mixed into an electrostatic spinning material, the nanometer fiber air filtering material which is remarkable in antibacterial effect, high in filtering efficiency and low in filtering resistance is prepared through electrostatic spinning, and the nanometer fiber air filtering material can be widely applied to air filters in closed environments.

The invention relates to a carbon-sandwiched cloth capable of efficiently absorbing VOCs in air and a preparation method thereof, and the preparation method comprises the following steps: carrying out ball milling on a mixed solution of first activated carbon and water until activated carbon particles are uniformly distributed, adding a modifier, and carrying out ultrasonic dipping dispersion to obtain a spraying solution; spraying the spraying liquid on a receiving base material and drying to obtain a high-water-absorption framework layer; uniformly mixing the second activated carbon with the activated aluminum oxide impregnated with the active component to obtain an adsorption material; laying a first hot melt adhesive net film on the non-sprayed surface of the super absorbent skeleton layer, continuously laying the adsorption material after hot pressing, then laying a second hot melt adhesive net film, performing hot pressing and fixing, and finally laying melt-blown cloth to obtain the carbon-sandwiched cloth. According to the invention, the coconut shell activated carbon which is dominated by mesopores and micropores and is loaded with strong water absorption groups is arranged at the upstream of the receiving base material, so that the material still has relatively high performance in a high-humidity environment; the moisture content of the VOCs in the mixed gas is reduced after the VOCs pass through the receiving base material, and adsorption of the VOCs on the microporous activated carbon is facilitated under the action of the active components.

This invention relates to the field of papermaking technology, specifically to a high charge density composite retention and filtration aid, its preparation method, and its application. The invention uses montmorillonite as raw material, acidifying it with sulfuric acid and then treating it with 3-mercaptopropyltrimethoxysilane to obtain modified montmorillonite; subsequently, it is mixed with acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, and 10-undecenal, and polymerized under nitrogen atmosphere using sodium persulfate as an initiator to prepare polymer-modified montmorillonite powder; using linear corn starch as raw material, it is gelatinized and reacted with 3-chloro-2-hydroxypropyltrimethylammonium chloride to obtain cationic starch; the cationic starch is then compounded with polymer-modified montmorillonite to obtain a high charge density composite retention and filtration aid.

The utility model relates to the technical field of pipeline filtering devices, and discloses a low-resistance pipeline filtering device which comprises a filtering cylinder body, a filtering cavity is formed in the filtering cylinder body, a filtering assembly is installed in the filtering cavity, and a first pipeline is arranged on the side, located on the filtering assembly, of the filtering cylinder body. A second pipeline is arranged on the filter cartridge main body on the other side of the filter assembly, the first pipeline is provided with a water flow inlet, and the second pipeline is provided with a water flow outlet; the filter assembly comprises a first water filter screen, a second water filter screen, a third water filter screen and a fourth water filter screen which are arranged in sequence, and an S-shaped channel is formed among the first water filter screen, the second water filter screen, the third water filter screen and the fourth water filter screen; the S-shaped channel is formed between the filtering assemblies, so that the filtering resistance of the pipeline is effectively reduced, and the service life of the pipeline filtering device is remarkably prolonged.

The application discloses a monolithic structure ceramic filter plate for low-grade iron concentrate dewatering and a preparation method thereof, and belongs to the technical field of ceramic filter plates.The application is characterized in that: a ceramic 3D printing material is prepared, and a double-head double-precision 3D printer is used to layer-by-layer print a monolithic structure ceramic filter plate base body; the base body mud blank is dried and fired, coated and fired again, and then a water outlet nozzle and a positioning hole are installed to obtain the monolithic structure ceramic filter plate for low-grade iron concentrate dewatering.The application reduces the surface roughness of the monolithic structure ceramic filter plate, improves the corrosion resistance and service life; the 3D printing technology is used to make the inner cavity of the monolithic structure ceramic filter plate have better symmetry, reduce the corrosion and damage caused by the too thin side of the filter plate, and the unique inner cavity column design has higher water flux under the premise of ensuring the strength of the base body, and the resistance caused by the reduction of the micro-pore diameter is compensated.

The invention discloses a nanofiber membrane for oil / water filtration and a preparation method and application thereof, and belongs to the technical field of filtration. The preparation method comprises the following steps: dispersing a polyurethane polymer into an organic solvent, stirring to obtain a spinning solution, then determining a receiving base material, and carrying out electrostatic spinning by using the spinning solution to obtain the nanofiber membrane for oil / water filtration. Due to the unique structure, the nanofiber membrane for oil / water filtration has the advantages of large specific surface area, high porosity, high filtration efficiency and low filtration resistance, is uniform in filtration effect, has hydrophilic and lipophilic properties, can be used for filtration of oily particles, water-based particles and salt particles, and is simple in structure and easy to implement. The filter is easy to manufacture and has a wide application prospect in the field of filtration.

The application discloses a kind of preparation methods of multifunctional fiber membrane based on multi-level hole limited dispersion, belong to membrane material preparation technical field.The application designs and prepares multi-level hole fiber membrane using electrospinning technology, and by regulating spinning solution component and spinning parameter, the controllable adjustment preparation of multi-level hole structure can be realized.Based on the space limited system of hole structure, high dispersity Pt cluster is constructed in fiber channel using atomic layer deposition technology, and multifunctional fiber membrane is constructed.The multifunctional fiber membrane prepared in the application can simultaneously realize the efficient low-resistance interception of particulate matter in indoor air and the complete catalytic removal of low-concentration formaldehyde, and provides reliable technical support for developing high-performance multifunctional membrane materials.

The invention relates to the technical field of synthetic fibers, and particularly discloses a nylon 66 fiber for filter fabric as well as a preparation method and application of the nylon 66 fiber. Nylon 66A and nylon 66B melts with different relative viscosities are distributed in a parallel composite spinning mode and then extruded through a special-shaped spinneret plate, forming is conducted through a TCS one-step spinning process, and the nylon 66 fiber with micro grooves in the fiber surface and with a twisted spiral structure in the length direction is prepared. Even if warp and weft crossed meshes of the fabric are blocked by solid particles, under the action of filtering pressure, fluid can still be transferred to the lower portion from the position above the fibers (the direction of incoming flow of filtered fluid) along the micro-grooves, and it can be guaranteed that the fluid penetrates through the filter cloth to flow smoothly by stacking the micro-grooves layer by layer. The prepared composite parallel fiber has the advantages of being small in filtering resistance, high in filtering precision, long in service life and the like, can be widely applied to the field of filter fabrics, and has high application and popularization value.

The invention belongs to the technical field of air filter materials, and discloses a multi-interface dielectric filter material with a woven structure and application thereof, the multi-interface dielectric filter material is composed of a fabric substrate and a dielectric enhancement layer attached to the surface of the fabric substrate; the fabric substrate comprises two layers of mesh surfaces and connecting monofilaments for connecting the two layers of mesh surfaces; the dielectric enhancement layer includes a base material and a solvent. The multi-interface dielectric filter material has a super-loose structure, and can be repeatedly cleaned to remove accumulated dust in the filter material, prolong the service life of the filter material, reduce the replacement frequency of the filter material and reduce the maintenance cost of a user; and the filter material with the ultra-loose structure can simultaneously realize ultra-low filter resistance, reduce energy consumption and reduce the use cost of a user.

The invention relates to numerical control micron-sized titanium metal fiber production equipment. The equipment is composed of a machine base, a high-precision servo speed reducer, a five-axis robot three-dimensional precision cutting tool rest, a special tool rest, a special blade, a servo fiber former, a servo fiber winding displacement device, a servo fiber take-up device, a computer control cabinet and the like. Micro contact is generated between the cutting tool and a workpiece through the special tool in the automatically-changed direction and angle and certain frequency and amplitude, cutting is achieved, and titanium metal and nickel metal can be machined into 10-50-micron superfine fibers. The invention has the advantages of small cutting force, low cutting heat, high tool durability, stable processing, high production efficiency and the like.